M: Paul Zimmerman <paulz@synopsys.com>
L: linux-usb@vger.kernel.org
S: Maintained
-F: drivers/staging/dwc2/
+F: drivers/usb/dwc2/
DESIGNWARE USB3 DRD IP DRIVER
M: Felipe Balbi <balbi@ti.com>
source "drivers/staging/mt29f_spinand/Kconfig"
-source "drivers/staging/dwc2/Kconfig"
-
source "drivers/staging/lustre/Kconfig"
source "drivers/staging/xillybus/Kconfig"
obj-$(CONFIG_SB105X) += sb105x/
obj-$(CONFIG_FIREWIRE_SERIAL) += fwserial/
obj-$(CONFIG_GOLDFISH) += goldfish/
-obj-$(CONFIG_USB_DWC2) += dwc2/
obj-$(CONFIG_LUSTRE_FS) += lustre/
obj-$(CONFIG_XILLYBUS) += xillybus/
obj-$(CONFIG_DGNC) += dgnc/
+++ /dev/null
-config USB_DWC2
- tristate "DesignWare USB2 DRD Core Support"
- depends on USB
- help
- Say Y or M here if your system has a Dual Role HighSpeed
- USB controller based on the DesignWare HSOTG IP Core.
-
- If you choose to build this driver as dynamically linked
- modules, the core module will be called dwc2.ko, the
- PCI bus interface module (if you have a PCI bus system)
- will be called dwc2_pci.ko and the platform interface module
- (for controllers directly connected to the CPU) will be called
- dwc2_platform.ko.
-
- NOTE: This driver at present only implements the Host mode
- of the controller. The existing s3c-hsotg driver supports
- Peripheral mode, but only for the Samsung S3C platforms.
- There are plans to merge the s3c-hsotg driver with this
- driver in the near future to create a dual-role driver.
-
-if USB_DWC2
-
-config USB_DWC2_DEBUG
- bool "Enable Debugging Messages"
- help
- Say Y here to enable debugging messages in the DWC2 Driver.
-
-config USB_DWC2_VERBOSE
- bool "Enable Verbose Debugging Messages"
- depends on USB_DWC2_DEBUG
- help
- Say Y here to enable verbose debugging messages in the DWC2 Driver.
- WARNING: Enabling this will quickly fill your message log.
- If in doubt, say N.
-
-config USB_DWC2_TRACK_MISSED_SOFS
- bool "Enable Missed SOF Tracking"
- help
- Say Y here to enable logging of missed SOF events to the dmesg log.
- WARNING: This feature is still experimental.
- If in doubt, say N.
-
-config USB_DWC2_DEBUG_PERIODIC
- bool "Enable Debugging Messages For Periodic Transfers"
- depends on USB_DWC2_DEBUG || USB_DWC2_VERBOSE
- default y
- help
- Say N here to disable (verbose) debugging messages to be
- logged for periodic transfers. This allows better debugging of
- non-periodic transfers, but of course the debug logs will be
- incomplete. Note that this also disables some debug messages
- for which the transfer type cannot be deduced.
-endif
+++ /dev/null
-ccflags-$(CONFIG_USB_DWC2_DEBUG) += -DDEBUG
-ccflags-$(CONFIG_USB_DWC2_VERBOSE) += -DVERBOSE_DEBUG
-
-obj-$(CONFIG_USB_DWC2) += dwc2.o
-
-dwc2-y += core.o core_intr.o
-
-# NOTE: This driver at present only implements the Host mode
-# of the controller. The existing s3c-hsotg driver supports
-# Peripheral mode, but only for the Samsung S3C platforms.
-# There are plans to merge the s3c-hsotg driver with this
-# driver in the near future to create a dual-role driver. Once
-# that is done, Host mode will become an optional feature that
-# is selected with a config option.
-
-dwc2-y += hcd.o hcd_intr.o
-dwc2-y += hcd_queue.o hcd_ddma.o
-
-ifneq ($(CONFIG_PCI),)
- obj-$(CONFIG_USB_DWC2) += dwc2_pci.o
-endif
-obj-$(CONFIG_USB_DWC2) += dwc2_platform.o
-
-dwc2_pci-y += pci.o
-dwc2_platform-y += platform.o
+++ /dev/null
-TODO:
- - Dan Carpenter would like to see some cleanups to the microframe
- scheduler code:
- http://www.mail-archive.com/linux-usb@vger.kernel.org/msg26650.html
-
- - Should merge the NAK holdoff patch from Raspberry Pi
- (http://marc.info/?l=linux-usb&m=137625067103833). But as it stands
- that patch is incomplete, it needs more investigation to see if it
- can be made to work for non-Raspberry Pi platforms that lack the
- special FIQ interrupt that the Pi has. Without this patch, the driver
- has a high interrupt rate (8K/sec).
-
- - The Raspberry Pi platform needs to have support for its FIQ interrupt
- added, to get the same level of functionality as the downstream
- driver. The raspberrypi.org developers have indicated they are
- willing to help with that.
-
- - Some of the default driver parameters (see 'struct dwc2_core_params'
- in core.h) won't work for many platforms. So DT attributes will need
- to be added for some of these. But that can be done as-needed as new
- platforms are added.
-
- - Eventually the driver should be merged with the s3c-hsotg peripheral
- mode driver, so that both modes of operation can be supported with a
- single driver. But I think that can wait till after the driver has
- been moved to mainline.
-
- - After that, OTG support can be added. I'm not sure how much demand
- there is for that, though, so I have that as a low priority.
-
-Please send any patches for this driver to Paul Zimmerman <paulz@synopsys.com>
-and Greg Kroah-Hartman <gregkh@linuxfoundation.org>. And please CC linux-usb
-<linux-usb@vger.kernel.org> too.
+++ /dev/null
-/*
- * core.c - DesignWare HS OTG Controller common routines
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * The Core code provides basic services for accessing and managing the
- * DWC_otg hardware. These services are used by both the Host Controller
- * Driver and the Peripheral Controller Driver.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-
-#include <linux/usb/hcd.h>
-#include <linux/usb/ch11.h>
-
-#include "core.h"
-#include "hcd.h"
-
-/**
- * dwc2_enable_common_interrupts() - Initializes the commmon interrupts,
- * used in both device and host modes
- *
- * @hsotg: Programming view of the DWC_otg controller
- */
-static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg)
-{
- u32 intmsk;
-
- /* Clear any pending OTG Interrupts */
- writel(0xffffffff, hsotg->regs + GOTGINT);
-
- /* Clear any pending interrupts */
- writel(0xffffffff, hsotg->regs + GINTSTS);
-
- /* Enable the interrupts in the GINTMSK */
- intmsk = GINTSTS_MODEMIS | GINTSTS_OTGINT;
-
- if (hsotg->core_params->dma_enable <= 0)
- intmsk |= GINTSTS_RXFLVL;
-
- intmsk |= GINTSTS_CONIDSTSCHNG | GINTSTS_WKUPINT | GINTSTS_USBSUSP |
- GINTSTS_SESSREQINT;
-
- writel(intmsk, hsotg->regs + GINTMSK);
-}
-
-/*
- * Initializes the FSLSPClkSel field of the HCFG register depending on the
- * PHY type
- */
-static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
-{
- u32 hcfg, val;
-
- if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
- hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
- hsotg->core_params->ulpi_fs_ls > 0) ||
- hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
- /* Full speed PHY */
- val = HCFG_FSLSPCLKSEL_48_MHZ;
- } else {
- /* High speed PHY running at full speed or high speed */
- val = HCFG_FSLSPCLKSEL_30_60_MHZ;
- }
-
- dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val);
- hcfg = readl(hsotg->regs + HCFG);
- hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
- hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT;
- writel(hcfg, hsotg->regs + HCFG);
-}
-
-/*
- * Do core a soft reset of the core. Be careful with this because it
- * resets all the internal state machines of the core.
- */
-static int dwc2_core_reset(struct dwc2_hsotg *hsotg)
-{
- u32 greset;
- int count = 0;
-
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- /* Wait for AHB master IDLE state */
- do {
- usleep_range(20000, 40000);
- greset = readl(hsotg->regs + GRSTCTL);
- if (++count > 50) {
- dev_warn(hsotg->dev,
- "%s() HANG! AHB Idle GRSTCTL=%0x\n",
- __func__, greset);
- return -EBUSY;
- }
- } while (!(greset & GRSTCTL_AHBIDLE));
-
- /* Core Soft Reset */
- count = 0;
- greset |= GRSTCTL_CSFTRST;
- writel(greset, hsotg->regs + GRSTCTL);
- do {
- usleep_range(20000, 40000);
- greset = readl(hsotg->regs + GRSTCTL);
- if (++count > 50) {
- dev_warn(hsotg->dev,
- "%s() HANG! Soft Reset GRSTCTL=%0x\n",
- __func__, greset);
- return -EBUSY;
- }
- } while (greset & GRSTCTL_CSFTRST);
-
- /*
- * NOTE: This long sleep is _very_ important, otherwise the core will
- * not stay in host mode after a connector ID change!
- */
- usleep_range(150000, 200000);
-
- return 0;
-}
-
-static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
-{
- u32 usbcfg, i2cctl;
- int retval = 0;
-
- /*
- * core_init() is now called on every switch so only call the
- * following for the first time through
- */
- if (select_phy) {
- dev_dbg(hsotg->dev, "FS PHY selected\n");
- usbcfg = readl(hsotg->regs + GUSBCFG);
- usbcfg |= GUSBCFG_PHYSEL;
- writel(usbcfg, hsotg->regs + GUSBCFG);
-
- /* Reset after a PHY select */
- retval = dwc2_core_reset(hsotg);
- if (retval) {
- dev_err(hsotg->dev, "%s() Reset failed, aborting",
- __func__);
- return retval;
- }
- }
-
- /*
- * Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also
- * do this on HNP Dev/Host mode switches (done in dev_init and
- * host_init).
- */
- if (dwc2_is_host_mode(hsotg))
- dwc2_init_fs_ls_pclk_sel(hsotg);
-
- if (hsotg->core_params->i2c_enable > 0) {
- dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
-
- /* Program GUSBCFG.OtgUtmiFsSel to I2C */
- usbcfg = readl(hsotg->regs + GUSBCFG);
- usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL;
- writel(usbcfg, hsotg->regs + GUSBCFG);
-
- /* Program GI2CCTL.I2CEn */
- i2cctl = readl(hsotg->regs + GI2CCTL);
- i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK;
- i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT;
- i2cctl &= ~GI2CCTL_I2CEN;
- writel(i2cctl, hsotg->regs + GI2CCTL);
- i2cctl |= GI2CCTL_I2CEN;
- writel(i2cctl, hsotg->regs + GI2CCTL);
- }
-
- return retval;
-}
-
-static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
-{
- u32 usbcfg;
- int retval = 0;
-
- if (!select_phy)
- return -ENODEV;
-
- usbcfg = readl(hsotg->regs + GUSBCFG);
-
- /*
- * HS PHY parameters. These parameters are preserved during soft reset
- * so only program the first time. Do a soft reset immediately after
- * setting phyif.
- */
- switch (hsotg->core_params->phy_type) {
- case DWC2_PHY_TYPE_PARAM_ULPI:
- /* ULPI interface */
- dev_dbg(hsotg->dev, "HS ULPI PHY selected\n");
- usbcfg |= GUSBCFG_ULPI_UTMI_SEL;
- usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL);
- if (hsotg->core_params->phy_ulpi_ddr > 0)
- usbcfg |= GUSBCFG_DDRSEL;
- break;
- case DWC2_PHY_TYPE_PARAM_UTMI:
- /* UTMI+ interface */
- dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n");
- usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16);
- if (hsotg->core_params->phy_utmi_width == 16)
- usbcfg |= GUSBCFG_PHYIF16;
- break;
- default:
- dev_err(hsotg->dev, "FS PHY selected at HS!\n");
- break;
- }
-
- writel(usbcfg, hsotg->regs + GUSBCFG);
-
- /* Reset after setting the PHY parameters */
- retval = dwc2_core_reset(hsotg);
- if (retval) {
- dev_err(hsotg->dev, "%s() Reset failed, aborting",
- __func__);
- return retval;
- }
-
- return retval;
-}
-
-static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
-{
- u32 usbcfg;
- int retval = 0;
-
- if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL &&
- hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
- /* If FS mode with FS PHY */
- retval = dwc2_fs_phy_init(hsotg, select_phy);
- if (retval)
- return retval;
- } else {
- /* High speed PHY */
- retval = dwc2_hs_phy_init(hsotg, select_phy);
- if (retval)
- return retval;
- }
-
- if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
- hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
- hsotg->core_params->ulpi_fs_ls > 0) {
- dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
- usbcfg = readl(hsotg->regs + GUSBCFG);
- usbcfg |= GUSBCFG_ULPI_FS_LS;
- usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M;
- writel(usbcfg, hsotg->regs + GUSBCFG);
- } else {
- usbcfg = readl(hsotg->regs + GUSBCFG);
- usbcfg &= ~GUSBCFG_ULPI_FS_LS;
- usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M;
- writel(usbcfg, hsotg->regs + GUSBCFG);
- }
-
- return retval;
-}
-
-static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg)
-{
- u32 ahbcfg = readl(hsotg->regs + GAHBCFG);
-
- switch (hsotg->hw_params.arch) {
- case GHWCFG2_EXT_DMA_ARCH:
- dev_err(hsotg->dev, "External DMA Mode not supported\n");
- return -EINVAL;
-
- case GHWCFG2_INT_DMA_ARCH:
- dev_dbg(hsotg->dev, "Internal DMA Mode\n");
- if (hsotg->core_params->ahbcfg != -1) {
- ahbcfg &= GAHBCFG_CTRL_MASK;
- ahbcfg |= hsotg->core_params->ahbcfg &
- ~GAHBCFG_CTRL_MASK;
- }
- break;
-
- case GHWCFG2_SLAVE_ONLY_ARCH:
- default:
- dev_dbg(hsotg->dev, "Slave Only Mode\n");
- break;
- }
-
- dev_dbg(hsotg->dev, "dma_enable:%d dma_desc_enable:%d\n",
- hsotg->core_params->dma_enable,
- hsotg->core_params->dma_desc_enable);
-
- if (hsotg->core_params->dma_enable > 0) {
- if (hsotg->core_params->dma_desc_enable > 0)
- dev_dbg(hsotg->dev, "Using Descriptor DMA mode\n");
- else
- dev_dbg(hsotg->dev, "Using Buffer DMA mode\n");
- } else {
- dev_dbg(hsotg->dev, "Using Slave mode\n");
- hsotg->core_params->dma_desc_enable = 0;
- }
-
- if (hsotg->core_params->dma_enable > 0)
- ahbcfg |= GAHBCFG_DMA_EN;
-
- writel(ahbcfg, hsotg->regs + GAHBCFG);
-
- return 0;
-}
-
-static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg)
-{
- u32 usbcfg;
-
- usbcfg = readl(hsotg->regs + GUSBCFG);
- usbcfg &= ~(GUSBCFG_HNPCAP | GUSBCFG_SRPCAP);
-
- switch (hsotg->hw_params.op_mode) {
- case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
- if (hsotg->core_params->otg_cap ==
- DWC2_CAP_PARAM_HNP_SRP_CAPABLE)
- usbcfg |= GUSBCFG_HNPCAP;
- if (hsotg->core_params->otg_cap !=
- DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
- usbcfg |= GUSBCFG_SRPCAP;
- break;
-
- case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
- case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
- case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
- if (hsotg->core_params->otg_cap !=
- DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
- usbcfg |= GUSBCFG_SRPCAP;
- break;
-
- case GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE:
- case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE:
- case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST:
- default:
- break;
- }
-
- writel(usbcfg, hsotg->regs + GUSBCFG);
-}
-
-/**
- * dwc2_core_init() - Initializes the DWC_otg controller registers and
- * prepares the core for device mode or host mode operation
- *
- * @hsotg: Programming view of the DWC_otg controller
- * @select_phy: If true then also set the Phy type
- * @irq: If >= 0, the irq to register
- */
-int dwc2_core_init(struct dwc2_hsotg *hsotg, bool select_phy, int irq)
-{
- u32 usbcfg, otgctl;
- int retval;
-
- dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
-
- usbcfg = readl(hsotg->regs + GUSBCFG);
-
- /* Set ULPI External VBUS bit if needed */
- usbcfg &= ~GUSBCFG_ULPI_EXT_VBUS_DRV;
- if (hsotg->core_params->phy_ulpi_ext_vbus ==
- DWC2_PHY_ULPI_EXTERNAL_VBUS)
- usbcfg |= GUSBCFG_ULPI_EXT_VBUS_DRV;
-
- /* Set external TS Dline pulsing bit if needed */
- usbcfg &= ~GUSBCFG_TERMSELDLPULSE;
- if (hsotg->core_params->ts_dline > 0)
- usbcfg |= GUSBCFG_TERMSELDLPULSE;
-
- writel(usbcfg, hsotg->regs + GUSBCFG);
-
- /* Reset the Controller */
- retval = dwc2_core_reset(hsotg);
- if (retval) {
- dev_err(hsotg->dev, "%s(): Reset failed, aborting\n",
- __func__);
- return retval;
- }
-
- /*
- * This needs to happen in FS mode before any other programming occurs
- */
- retval = dwc2_phy_init(hsotg, select_phy);
- if (retval)
- return retval;
-
- /* Program the GAHBCFG Register */
- retval = dwc2_gahbcfg_init(hsotg);
- if (retval)
- return retval;
-
- /* Program the GUSBCFG register */
- dwc2_gusbcfg_init(hsotg);
-
- /* Program the GOTGCTL register */
- otgctl = readl(hsotg->regs + GOTGCTL);
- otgctl &= ~GOTGCTL_OTGVER;
- if (hsotg->core_params->otg_ver > 0)
- otgctl |= GOTGCTL_OTGVER;
- writel(otgctl, hsotg->regs + GOTGCTL);
- dev_dbg(hsotg->dev, "OTG VER PARAM: %d\n", hsotg->core_params->otg_ver);
-
- /* Clear the SRP success bit for FS-I2c */
- hsotg->srp_success = 0;
-
- if (irq >= 0) {
- dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
- irq);
- retval = devm_request_irq(hsotg->dev, irq,
- dwc2_handle_common_intr, IRQF_SHARED,
- dev_name(hsotg->dev), hsotg);
- if (retval)
- return retval;
- }
-
- /* Enable common interrupts */
- dwc2_enable_common_interrupts(hsotg);
-
- /*
- * Do device or host intialization based on mode during PCD and
- * HCD initialization
- */
- if (dwc2_is_host_mode(hsotg)) {
- dev_dbg(hsotg->dev, "Host Mode\n");
- hsotg->op_state = OTG_STATE_A_HOST;
- } else {
- dev_dbg(hsotg->dev, "Device Mode\n");
- hsotg->op_state = OTG_STATE_B_PERIPHERAL;
- }
-
- return 0;
-}
-
-/**
- * dwc2_enable_host_interrupts() - Enables the Host mode interrupts
- *
- * @hsotg: Programming view of DWC_otg controller
- */
-void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg)
-{
- u32 intmsk;
-
- dev_dbg(hsotg->dev, "%s()\n", __func__);
-
- /* Disable all interrupts */
- writel(0, hsotg->regs + GINTMSK);
- writel(0, hsotg->regs + HAINTMSK);
-
- /* Enable the common interrupts */
- dwc2_enable_common_interrupts(hsotg);
-
- /* Enable host mode interrupts without disturbing common interrupts */
- intmsk = readl(hsotg->regs + GINTMSK);
- intmsk |= GINTSTS_DISCONNINT | GINTSTS_PRTINT | GINTSTS_HCHINT;
- writel(intmsk, hsotg->regs + GINTMSK);
-}
-
-/**
- * dwc2_disable_host_interrupts() - Disables the Host Mode interrupts
- *
- * @hsotg: Programming view of DWC_otg controller
- */
-void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg)
-{
- u32 intmsk = readl(hsotg->regs + GINTMSK);
-
- /* Disable host mode interrupts without disturbing common interrupts */
- intmsk &= ~(GINTSTS_SOF | GINTSTS_PRTINT | GINTSTS_HCHINT |
- GINTSTS_PTXFEMP | GINTSTS_NPTXFEMP);
- writel(intmsk, hsotg->regs + GINTMSK);
-}
-
-static void dwc2_config_fifos(struct dwc2_hsotg *hsotg)
-{
- struct dwc2_core_params *params = hsotg->core_params;
- u32 nptxfsiz, hptxfsiz, dfifocfg, grxfsiz;
-
- if (!params->enable_dynamic_fifo)
- return;
-
- /* Rx FIFO */
- grxfsiz = readl(hsotg->regs + GRXFSIZ);
- dev_dbg(hsotg->dev, "initial grxfsiz=%08x\n", grxfsiz);
- grxfsiz &= ~GRXFSIZ_DEPTH_MASK;
- grxfsiz |= params->host_rx_fifo_size <<
- GRXFSIZ_DEPTH_SHIFT & GRXFSIZ_DEPTH_MASK;
- writel(grxfsiz, hsotg->regs + GRXFSIZ);
- dev_dbg(hsotg->dev, "new grxfsiz=%08x\n", readl(hsotg->regs + GRXFSIZ));
-
- /* Non-periodic Tx FIFO */
- dev_dbg(hsotg->dev, "initial gnptxfsiz=%08x\n",
- readl(hsotg->regs + GNPTXFSIZ));
- nptxfsiz = params->host_nperio_tx_fifo_size <<
- FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
- nptxfsiz |= params->host_rx_fifo_size <<
- FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
- writel(nptxfsiz, hsotg->regs + GNPTXFSIZ);
- dev_dbg(hsotg->dev, "new gnptxfsiz=%08x\n",
- readl(hsotg->regs + GNPTXFSIZ));
-
- /* Periodic Tx FIFO */
- dev_dbg(hsotg->dev, "initial hptxfsiz=%08x\n",
- readl(hsotg->regs + HPTXFSIZ));
- hptxfsiz = params->host_perio_tx_fifo_size <<
- FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
- hptxfsiz |= (params->host_rx_fifo_size +
- params->host_nperio_tx_fifo_size) <<
- FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
- writel(hptxfsiz, hsotg->regs + HPTXFSIZ);
- dev_dbg(hsotg->dev, "new hptxfsiz=%08x\n",
- readl(hsotg->regs + HPTXFSIZ));
-
- if (hsotg->core_params->en_multiple_tx_fifo > 0 &&
- hsotg->hw_params.snpsid <= DWC2_CORE_REV_2_94a) {
- /*
- * Global DFIFOCFG calculation for Host mode -
- * include RxFIFO, NPTXFIFO and HPTXFIFO
- */
- dfifocfg = readl(hsotg->regs + GDFIFOCFG);
- dfifocfg &= ~GDFIFOCFG_EPINFOBASE_MASK;
- dfifocfg |= (params->host_rx_fifo_size +
- params->host_nperio_tx_fifo_size +
- params->host_perio_tx_fifo_size) <<
- GDFIFOCFG_EPINFOBASE_SHIFT &
- GDFIFOCFG_EPINFOBASE_MASK;
- writel(dfifocfg, hsotg->regs + GDFIFOCFG);
- }
-}
-
-/**
- * dwc2_core_host_init() - Initializes the DWC_otg controller registers for
- * Host mode
- *
- * @hsotg: Programming view of DWC_otg controller
- *
- * This function flushes the Tx and Rx FIFOs and flushes any entries in the
- * request queues. Host channels are reset to ensure that they are ready for
- * performing transfers.
- */
-void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
-{
- u32 hcfg, hfir, otgctl;
-
- dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
-
- /* Restart the Phy Clock */
- writel(0, hsotg->regs + PCGCTL);
-
- /* Initialize Host Configuration Register */
- dwc2_init_fs_ls_pclk_sel(hsotg);
- if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL) {
- hcfg = readl(hsotg->regs + HCFG);
- hcfg |= HCFG_FSLSSUPP;
- writel(hcfg, hsotg->regs + HCFG);
- }
-
- /*
- * This bit allows dynamic reloading of the HFIR register during
- * runtime. This bit needs to be programmed during initial configuration
- * and its value must not be changed during runtime.
- */
- if (hsotg->core_params->reload_ctl > 0) {
- hfir = readl(hsotg->regs + HFIR);
- hfir |= HFIR_RLDCTRL;
- writel(hfir, hsotg->regs + HFIR);
- }
-
- if (hsotg->core_params->dma_desc_enable > 0) {
- u32 op_mode = hsotg->hw_params.op_mode;
- if (hsotg->hw_params.snpsid < DWC2_CORE_REV_2_90a ||
- !hsotg->hw_params.dma_desc_enable ||
- op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE ||
- op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE ||
- op_mode == GHWCFG2_OP_MODE_UNDEFINED) {
- dev_err(hsotg->dev,
- "Hardware does not support descriptor DMA mode -\n");
- dev_err(hsotg->dev,
- "falling back to buffer DMA mode.\n");
- hsotg->core_params->dma_desc_enable = 0;
- } else {
- hcfg = readl(hsotg->regs + HCFG);
- hcfg |= HCFG_DESCDMA;
- writel(hcfg, hsotg->regs + HCFG);
- }
- }
-
- /* Configure data FIFO sizes */
- dwc2_config_fifos(hsotg);
-
- /* TODO - check this */
- /* Clear Host Set HNP Enable in the OTG Control Register */
- otgctl = readl(hsotg->regs + GOTGCTL);
- otgctl &= ~GOTGCTL_HSTSETHNPEN;
- writel(otgctl, hsotg->regs + GOTGCTL);
-
- /* Make sure the FIFOs are flushed */
- dwc2_flush_tx_fifo(hsotg, 0x10 /* all TX FIFOs */);
- dwc2_flush_rx_fifo(hsotg);
-
- /* Clear Host Set HNP Enable in the OTG Control Register */
- otgctl = readl(hsotg->regs + GOTGCTL);
- otgctl &= ~GOTGCTL_HSTSETHNPEN;
- writel(otgctl, hsotg->regs + GOTGCTL);
-
- if (hsotg->core_params->dma_desc_enable <= 0) {
- int num_channels, i;
- u32 hcchar;
-
- /* Flush out any leftover queued requests */
- num_channels = hsotg->core_params->host_channels;
- for (i = 0; i < num_channels; i++) {
- hcchar = readl(hsotg->regs + HCCHAR(i));
- hcchar &= ~HCCHAR_CHENA;
- hcchar |= HCCHAR_CHDIS;
- hcchar &= ~HCCHAR_EPDIR;
- writel(hcchar, hsotg->regs + HCCHAR(i));
- }
-
- /* Halt all channels to put them into a known state */
- for (i = 0; i < num_channels; i++) {
- int count = 0;
-
- hcchar = readl(hsotg->regs + HCCHAR(i));
- hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS;
- hcchar &= ~HCCHAR_EPDIR;
- writel(hcchar, hsotg->regs + HCCHAR(i));
- dev_dbg(hsotg->dev, "%s: Halt channel %d\n",
- __func__, i);
- do {
- hcchar = readl(hsotg->regs + HCCHAR(i));
- if (++count > 1000) {
- dev_err(hsotg->dev,
- "Unable to clear enable on channel %d\n",
- i);
- break;
- }
- udelay(1);
- } while (hcchar & HCCHAR_CHENA);
- }
- }
-
- /* Turn on the vbus power */
- dev_dbg(hsotg->dev, "Init: Port Power? op_state=%d\n", hsotg->op_state);
- if (hsotg->op_state == OTG_STATE_A_HOST) {
- u32 hprt0 = dwc2_read_hprt0(hsotg);
-
- dev_dbg(hsotg->dev, "Init: Power Port (%d)\n",
- !!(hprt0 & HPRT0_PWR));
- if (!(hprt0 & HPRT0_PWR)) {
- hprt0 |= HPRT0_PWR;
- writel(hprt0, hsotg->regs + HPRT0);
- }
- }
-
- dwc2_enable_host_interrupts(hsotg);
-}
-
-static void dwc2_hc_enable_slave_ints(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
- u32 hcintmsk = HCINTMSK_CHHLTD;
-
- switch (chan->ep_type) {
- case USB_ENDPOINT_XFER_CONTROL:
- case USB_ENDPOINT_XFER_BULK:
- dev_vdbg(hsotg->dev, "control/bulk\n");
- hcintmsk |= HCINTMSK_XFERCOMPL;
- hcintmsk |= HCINTMSK_STALL;
- hcintmsk |= HCINTMSK_XACTERR;
- hcintmsk |= HCINTMSK_DATATGLERR;
- if (chan->ep_is_in) {
- hcintmsk |= HCINTMSK_BBLERR;
- } else {
- hcintmsk |= HCINTMSK_NAK;
- hcintmsk |= HCINTMSK_NYET;
- if (chan->do_ping)
- hcintmsk |= HCINTMSK_ACK;
- }
-
- if (chan->do_split) {
- hcintmsk |= HCINTMSK_NAK;
- if (chan->complete_split)
- hcintmsk |= HCINTMSK_NYET;
- else
- hcintmsk |= HCINTMSK_ACK;
- }
-
- if (chan->error_state)
- hcintmsk |= HCINTMSK_ACK;
- break;
-
- case USB_ENDPOINT_XFER_INT:
- if (dbg_perio())
- dev_vdbg(hsotg->dev, "intr\n");
- hcintmsk |= HCINTMSK_XFERCOMPL;
- hcintmsk |= HCINTMSK_NAK;
- hcintmsk |= HCINTMSK_STALL;
- hcintmsk |= HCINTMSK_XACTERR;
- hcintmsk |= HCINTMSK_DATATGLERR;
- hcintmsk |= HCINTMSK_FRMOVRUN;
-
- if (chan->ep_is_in)
- hcintmsk |= HCINTMSK_BBLERR;
- if (chan->error_state)
- hcintmsk |= HCINTMSK_ACK;
- if (chan->do_split) {
- if (chan->complete_split)
- hcintmsk |= HCINTMSK_NYET;
- else
- hcintmsk |= HCINTMSK_ACK;
- }
- break;
-
- case USB_ENDPOINT_XFER_ISOC:
- if (dbg_perio())
- dev_vdbg(hsotg->dev, "isoc\n");
- hcintmsk |= HCINTMSK_XFERCOMPL;
- hcintmsk |= HCINTMSK_FRMOVRUN;
- hcintmsk |= HCINTMSK_ACK;
-
- if (chan->ep_is_in) {
- hcintmsk |= HCINTMSK_XACTERR;
- hcintmsk |= HCINTMSK_BBLERR;
- }
- break;
- default:
- dev_err(hsotg->dev, "## Unknown EP type ##\n");
- break;
- }
-
- writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
-}
-
-static void dwc2_hc_enable_dma_ints(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
- u32 hcintmsk = HCINTMSK_CHHLTD;
-
- /*
- * For Descriptor DMA mode core halts the channel on AHB error.
- * Interrupt is not required.
- */
- if (hsotg->core_params->dma_desc_enable <= 0) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "desc DMA disabled\n");
- hcintmsk |= HCINTMSK_AHBERR;
- } else {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "desc DMA enabled\n");
- if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
- hcintmsk |= HCINTMSK_XFERCOMPL;
- }
-
- if (chan->error_state && !chan->do_split &&
- chan->ep_type != USB_ENDPOINT_XFER_ISOC) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "setting ACK\n");
- hcintmsk |= HCINTMSK_ACK;
- if (chan->ep_is_in) {
- hcintmsk |= HCINTMSK_DATATGLERR;
- if (chan->ep_type != USB_ENDPOINT_XFER_INT)
- hcintmsk |= HCINTMSK_NAK;
- }
- }
-
- writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
-}
-
-static void dwc2_hc_enable_ints(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
- u32 intmsk;
-
- if (hsotg->core_params->dma_enable > 0) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "DMA enabled\n");
- dwc2_hc_enable_dma_ints(hsotg, chan);
- } else {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "DMA disabled\n");
- dwc2_hc_enable_slave_ints(hsotg, chan);
- }
-
- /* Enable the top level host channel interrupt */
- intmsk = readl(hsotg->regs + HAINTMSK);
- intmsk |= 1 << chan->hc_num;
- writel(intmsk, hsotg->regs + HAINTMSK);
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "set HAINTMSK to %08x\n", intmsk);
-
- /* Make sure host channel interrupts are enabled */
- intmsk = readl(hsotg->regs + GINTMSK);
- intmsk |= GINTSTS_HCHINT;
- writel(intmsk, hsotg->regs + GINTMSK);
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "set GINTMSK to %08x\n", intmsk);
-}
-
-/**
- * dwc2_hc_init() - Prepares a host channel for transferring packets to/from
- * a specific endpoint
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Information needed to initialize the host channel
- *
- * The HCCHARn register is set up with the characteristics specified in chan.
- * Host channel interrupts that may need to be serviced while this transfer is
- * in progress are enabled.
- */
-void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
-{
- u8 hc_num = chan->hc_num;
- u32 hcintmsk;
- u32 hcchar;
- u32 hcsplt = 0;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- /* Clear old interrupt conditions for this host channel */
- hcintmsk = 0xffffffff;
- hcintmsk &= ~HCINTMSK_RESERVED14_31;
- writel(hcintmsk, hsotg->regs + HCINT(hc_num));
-
- /* Enable channel interrupts required for this transfer */
- dwc2_hc_enable_ints(hsotg, chan);
-
- /*
- * Program the HCCHARn register with the endpoint characteristics for
- * the current transfer
- */
- hcchar = chan->dev_addr << HCCHAR_DEVADDR_SHIFT & HCCHAR_DEVADDR_MASK;
- hcchar |= chan->ep_num << HCCHAR_EPNUM_SHIFT & HCCHAR_EPNUM_MASK;
- if (chan->ep_is_in)
- hcchar |= HCCHAR_EPDIR;
- if (chan->speed == USB_SPEED_LOW)
- hcchar |= HCCHAR_LSPDDEV;
- hcchar |= chan->ep_type << HCCHAR_EPTYPE_SHIFT & HCCHAR_EPTYPE_MASK;
- hcchar |= chan->max_packet << HCCHAR_MPS_SHIFT & HCCHAR_MPS_MASK;
- writel(hcchar, hsotg->regs + HCCHAR(hc_num));
- if (dbg_hc(chan)) {
- dev_vdbg(hsotg->dev, "set HCCHAR(%d) to %08x\n",
- hc_num, hcchar);
-
- dev_vdbg(hsotg->dev, "%s: Channel %d\n",
- __func__, hc_num);
- dev_vdbg(hsotg->dev, " Dev Addr: %d\n",
- chan->dev_addr);
- dev_vdbg(hsotg->dev, " Ep Num: %d\n",
- chan->ep_num);
- dev_vdbg(hsotg->dev, " Is In: %d\n",
- chan->ep_is_in);
- dev_vdbg(hsotg->dev, " Is Low Speed: %d\n",
- chan->speed == USB_SPEED_LOW);
- dev_vdbg(hsotg->dev, " Ep Type: %d\n",
- chan->ep_type);
- dev_vdbg(hsotg->dev, " Max Pkt: %d\n",
- chan->max_packet);
- }
-
- /* Program the HCSPLT register for SPLITs */
- if (chan->do_split) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev,
- "Programming HC %d with split --> %s\n",
- hc_num,
- chan->complete_split ? "CSPLIT" : "SSPLIT");
- if (chan->complete_split)
- hcsplt |= HCSPLT_COMPSPLT;
- hcsplt |= chan->xact_pos << HCSPLT_XACTPOS_SHIFT &
- HCSPLT_XACTPOS_MASK;
- hcsplt |= chan->hub_addr << HCSPLT_HUBADDR_SHIFT &
- HCSPLT_HUBADDR_MASK;
- hcsplt |= chan->hub_port << HCSPLT_PRTADDR_SHIFT &
- HCSPLT_PRTADDR_MASK;
- if (dbg_hc(chan)) {
- dev_vdbg(hsotg->dev, " comp split %d\n",
- chan->complete_split);
- dev_vdbg(hsotg->dev, " xact pos %d\n",
- chan->xact_pos);
- dev_vdbg(hsotg->dev, " hub addr %d\n",
- chan->hub_addr);
- dev_vdbg(hsotg->dev, " hub port %d\n",
- chan->hub_port);
- dev_vdbg(hsotg->dev, " is_in %d\n",
- chan->ep_is_in);
- dev_vdbg(hsotg->dev, " Max Pkt %d\n",
- chan->max_packet);
- dev_vdbg(hsotg->dev, " xferlen %d\n",
- chan->xfer_len);
- }
- }
-
- writel(hcsplt, hsotg->regs + HCSPLT(hc_num));
-}
-
-/**
- * dwc2_hc_halt() - Attempts to halt a host channel
- *
- * @hsotg: Controller register interface
- * @chan: Host channel to halt
- * @halt_status: Reason for halting the channel
- *
- * This function should only be called in Slave mode or to abort a transfer in
- * either Slave mode or DMA mode. Under normal circumstances in DMA mode, the
- * controller halts the channel when the transfer is complete or a condition
- * occurs that requires application intervention.
- *
- * In slave mode, checks for a free request queue entry, then sets the Channel
- * Enable and Channel Disable bits of the Host Channel Characteristics
- * register of the specified channel to intiate the halt. If there is no free
- * request queue entry, sets only the Channel Disable bit of the HCCHARn
- * register to flush requests for this channel. In the latter case, sets a
- * flag to indicate that the host channel needs to be halted when a request
- * queue slot is open.
- *
- * In DMA mode, always sets the Channel Enable and Channel Disable bits of the
- * HCCHARn register. The controller ensures there is space in the request
- * queue before submitting the halt request.
- *
- * Some time may elapse before the core flushes any posted requests for this
- * host channel and halts. The Channel Halted interrupt handler completes the
- * deactivation of the host channel.
- */
-void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
- enum dwc2_halt_status halt_status)
-{
- u32 nptxsts, hptxsts, hcchar;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
- if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS)
- dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status);
-
- if (halt_status == DWC2_HC_XFER_URB_DEQUEUE ||
- halt_status == DWC2_HC_XFER_AHB_ERR) {
- /*
- * Disable all channel interrupts except Ch Halted. The QTD
- * and QH state associated with this transfer has been cleared
- * (in the case of URB_DEQUEUE), so the channel needs to be
- * shut down carefully to prevent crashes.
- */
- u32 hcintmsk = HCINTMSK_CHHLTD;
-
- dev_vdbg(hsotg->dev, "dequeue/error\n");
- writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
-
- /*
- * Make sure no other interrupts besides halt are currently
- * pending. Handling another interrupt could cause a crash due
- * to the QTD and QH state.
- */
- writel(~hcintmsk, hsotg->regs + HCINT(chan->hc_num));
-
- /*
- * Make sure the halt status is set to URB_DEQUEUE or AHB_ERR
- * even if the channel was already halted for some other
- * reason
- */
- chan->halt_status = halt_status;
-
- hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
- if (!(hcchar & HCCHAR_CHENA)) {
- /*
- * The channel is either already halted or it hasn't
- * started yet. In DMA mode, the transfer may halt if
- * it finishes normally or a condition occurs that
- * requires driver intervention. Don't want to halt
- * the channel again. In either Slave or DMA mode,
- * it's possible that the transfer has been assigned
- * to a channel, but not started yet when an URB is
- * dequeued. Don't want to halt a channel that hasn't
- * started yet.
- */
- return;
- }
- }
- if (chan->halt_pending) {
- /*
- * A halt has already been issued for this channel. This might
- * happen when a transfer is aborted by a higher level in
- * the stack.
- */
- dev_vdbg(hsotg->dev,
- "*** %s: Channel %d, chan->halt_pending already set ***\n",
- __func__, chan->hc_num);
- return;
- }
-
- hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
-
- /* No need to set the bit in DDMA for disabling the channel */
- /* TODO check it everywhere channel is disabled */
- if (hsotg->core_params->dma_desc_enable <= 0) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "desc DMA disabled\n");
- hcchar |= HCCHAR_CHENA;
- } else {
- if (dbg_hc(chan))
- dev_dbg(hsotg->dev, "desc DMA enabled\n");
- }
- hcchar |= HCCHAR_CHDIS;
-
- if (hsotg->core_params->dma_enable <= 0) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "DMA not enabled\n");
- hcchar |= HCCHAR_CHENA;
-
- /* Check for space in the request queue to issue the halt */
- if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
- chan->ep_type == USB_ENDPOINT_XFER_BULK) {
- dev_vdbg(hsotg->dev, "control/bulk\n");
- nptxsts = readl(hsotg->regs + GNPTXSTS);
- if ((nptxsts & TXSTS_QSPCAVAIL_MASK) == 0) {
- dev_vdbg(hsotg->dev, "Disabling channel\n");
- hcchar &= ~HCCHAR_CHENA;
- }
- } else {
- if (dbg_perio())
- dev_vdbg(hsotg->dev, "isoc/intr\n");
- hptxsts = readl(hsotg->regs + HPTXSTS);
- if ((hptxsts & TXSTS_QSPCAVAIL_MASK) == 0 ||
- hsotg->queuing_high_bandwidth) {
- if (dbg_perio())
- dev_vdbg(hsotg->dev, "Disabling channel\n");
- hcchar &= ~HCCHAR_CHENA;
- }
- }
- } else {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "DMA enabled\n");
- }
-
- writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
- chan->halt_status = halt_status;
-
- if (hcchar & HCCHAR_CHENA) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "Channel enabled\n");
- chan->halt_pending = 1;
- chan->halt_on_queue = 0;
- } else {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "Channel disabled\n");
- chan->halt_on_queue = 1;
- }
-
- if (dbg_hc(chan)) {
- dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
- chan->hc_num);
- dev_vdbg(hsotg->dev, " hcchar: 0x%08x\n",
- hcchar);
- dev_vdbg(hsotg->dev, " halt_pending: %d\n",
- chan->halt_pending);
- dev_vdbg(hsotg->dev, " halt_on_queue: %d\n",
- chan->halt_on_queue);
- dev_vdbg(hsotg->dev, " halt_status: %d\n",
- chan->halt_status);
- }
-}
-
-/**
- * dwc2_hc_cleanup() - Clears the transfer state for a host channel
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Identifies the host channel to clean up
- *
- * This function is normally called after a transfer is done and the host
- * channel is being released
- */
-void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
-{
- u32 hcintmsk;
-
- chan->xfer_started = 0;
-
- /*
- * Clear channel interrupt enables and any unhandled channel interrupt
- * conditions
- */
- writel(0, hsotg->regs + HCINTMSK(chan->hc_num));
- hcintmsk = 0xffffffff;
- hcintmsk &= ~HCINTMSK_RESERVED14_31;
- writel(hcintmsk, hsotg->regs + HCINT(chan->hc_num));
-}
-
-/**
- * dwc2_hc_set_even_odd_frame() - Sets the channel property that indicates in
- * which frame a periodic transfer should occur
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Identifies the host channel to set up and its properties
- * @hcchar: Current value of the HCCHAR register for the specified host channel
- *
- * This function has no effect on non-periodic transfers
- */
-static void dwc2_hc_set_even_odd_frame(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, u32 *hcchar)
-{
- if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
- /* 1 if _next_ frame is odd, 0 if it's even */
- if (!(dwc2_hcd_get_frame_number(hsotg) & 0x1))
- *hcchar |= HCCHAR_ODDFRM;
- }
-}
-
-static void dwc2_set_pid_isoc(struct dwc2_host_chan *chan)
-{
- /* Set up the initial PID for the transfer */
- if (chan->speed == USB_SPEED_HIGH) {
- if (chan->ep_is_in) {
- if (chan->multi_count == 1)
- chan->data_pid_start = DWC2_HC_PID_DATA0;
- else if (chan->multi_count == 2)
- chan->data_pid_start = DWC2_HC_PID_DATA1;
- else
- chan->data_pid_start = DWC2_HC_PID_DATA2;
- } else {
- if (chan->multi_count == 1)
- chan->data_pid_start = DWC2_HC_PID_DATA0;
- else
- chan->data_pid_start = DWC2_HC_PID_MDATA;
- }
- } else {
- chan->data_pid_start = DWC2_HC_PID_DATA0;
- }
-}
-
-/**
- * dwc2_hc_write_packet() - Writes a packet into the Tx FIFO associated with
- * the Host Channel
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Information needed to initialize the host channel
- *
- * This function should only be called in Slave mode. For a channel associated
- * with a non-periodic EP, the non-periodic Tx FIFO is written. For a channel
- * associated with a periodic EP, the periodic Tx FIFO is written.
- *
- * Upon return the xfer_buf and xfer_count fields in chan are incremented by
- * the number of bytes written to the Tx FIFO.
- */
-static void dwc2_hc_write_packet(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
- u32 i;
- u32 remaining_count;
- u32 byte_count;
- u32 dword_count;
- u32 __iomem *data_fifo;
- u32 *data_buf = (u32 *)chan->xfer_buf;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- data_fifo = (u32 __iomem *)(hsotg->regs + HCFIFO(chan->hc_num));
-
- remaining_count = chan->xfer_len - chan->xfer_count;
- if (remaining_count > chan->max_packet)
- byte_count = chan->max_packet;
- else
- byte_count = remaining_count;
-
- dword_count = (byte_count + 3) / 4;
-
- if (((unsigned long)data_buf & 0x3) == 0) {
- /* xfer_buf is DWORD aligned */
- for (i = 0; i < dword_count; i++, data_buf++)
- writel(*data_buf, data_fifo);
- } else {
- /* xfer_buf is not DWORD aligned */
- for (i = 0; i < dword_count; i++, data_buf++) {
- u32 data = data_buf[0] | data_buf[1] << 8 |
- data_buf[2] << 16 | data_buf[3] << 24;
- writel(data, data_fifo);
- }
- }
-
- chan->xfer_count += byte_count;
- chan->xfer_buf += byte_count;
-}
-
-/**
- * dwc2_hc_start_transfer() - Does the setup for a data transfer for a host
- * channel and starts the transfer
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Information needed to initialize the host channel. The xfer_len value
- * may be reduced to accommodate the max widths of the XferSize and
- * PktCnt fields in the HCTSIZn register. The multi_count value may be
- * changed to reflect the final xfer_len value.
- *
- * This function may be called in either Slave mode or DMA mode. In Slave mode,
- * the caller must ensure that there is sufficient space in the request queue
- * and Tx Data FIFO.
- *
- * For an OUT transfer in Slave mode, it loads a data packet into the
- * appropriate FIFO. If necessary, additional data packets are loaded in the
- * Host ISR.
- *
- * For an IN transfer in Slave mode, a data packet is requested. The data
- * packets are unloaded from the Rx FIFO in the Host ISR. If necessary,
- * additional data packets are requested in the Host ISR.
- *
- * For a PING transfer in Slave mode, the Do Ping bit is set in the HCTSIZ
- * register along with a packet count of 1 and the channel is enabled. This
- * causes a single PING transaction to occur. Other fields in HCTSIZ are
- * simply set to 0 since no data transfer occurs in this case.
- *
- * For a PING transfer in DMA mode, the HCTSIZ register is initialized with
- * all the information required to perform the subsequent data transfer. In
- * addition, the Do Ping bit is set in the HCTSIZ register. In this case, the
- * controller performs the entire PING protocol, then starts the data
- * transfer.
- */
-void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
- u32 max_hc_xfer_size = hsotg->core_params->max_transfer_size;
- u16 max_hc_pkt_count = hsotg->core_params->max_packet_count;
- u32 hcchar;
- u32 hctsiz = 0;
- u16 num_packets;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- if (chan->do_ping) {
- if (hsotg->core_params->dma_enable <= 0) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "ping, no DMA\n");
- dwc2_hc_do_ping(hsotg, chan);
- chan->xfer_started = 1;
- return;
- } else {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "ping, DMA\n");
- hctsiz |= TSIZ_DOPNG;
- }
- }
-
- if (chan->do_split) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "split\n");
- num_packets = 1;
-
- if (chan->complete_split && !chan->ep_is_in)
- /*
- * For CSPLIT OUT Transfer, set the size to 0 so the
- * core doesn't expect any data written to the FIFO
- */
- chan->xfer_len = 0;
- else if (chan->ep_is_in || chan->xfer_len > chan->max_packet)
- chan->xfer_len = chan->max_packet;
- else if (!chan->ep_is_in && chan->xfer_len > 188)
- chan->xfer_len = 188;
-
- hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
- TSIZ_XFERSIZE_MASK;
- } else {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "no split\n");
- /*
- * Ensure that the transfer length and packet count will fit
- * in the widths allocated for them in the HCTSIZn register
- */
- if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
- /*
- * Make sure the transfer size is no larger than one
- * (micro)frame's worth of data. (A check was done
- * when the periodic transfer was accepted to ensure
- * that a (micro)frame's worth of data can be
- * programmed into a channel.)
- */
- u32 max_periodic_len =
- chan->multi_count * chan->max_packet;
-
- if (chan->xfer_len > max_periodic_len)
- chan->xfer_len = max_periodic_len;
- } else if (chan->xfer_len > max_hc_xfer_size) {
- /*
- * Make sure that xfer_len is a multiple of max packet
- * size
- */
- chan->xfer_len =
- max_hc_xfer_size - chan->max_packet + 1;
- }
-
- if (chan->xfer_len > 0) {
- num_packets = (chan->xfer_len + chan->max_packet - 1) /
- chan->max_packet;
- if (num_packets > max_hc_pkt_count) {
- num_packets = max_hc_pkt_count;
- chan->xfer_len = num_packets * chan->max_packet;
- }
- } else {
- /* Need 1 packet for transfer length of 0 */
- num_packets = 1;
- }
-
- if (chan->ep_is_in)
- /*
- * Always program an integral # of max packets for IN
- * transfers
- */
- chan->xfer_len = num_packets * chan->max_packet;
-
- if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC)
- /*
- * Make sure that the multi_count field matches the
- * actual transfer length
- */
- chan->multi_count = num_packets;
-
- if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
- dwc2_set_pid_isoc(chan);
-
- hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
- TSIZ_XFERSIZE_MASK;
- }
-
- chan->start_pkt_count = num_packets;
- hctsiz |= num_packets << TSIZ_PKTCNT_SHIFT & TSIZ_PKTCNT_MASK;
- hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
- TSIZ_SC_MC_PID_MASK;
- writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
- if (dbg_hc(chan)) {
- dev_vdbg(hsotg->dev, "Wrote %08x to HCTSIZ(%d)\n",
- hctsiz, chan->hc_num);
-
- dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
- chan->hc_num);
- dev_vdbg(hsotg->dev, " Xfer Size: %d\n",
- (hctsiz & TSIZ_XFERSIZE_MASK) >>
- TSIZ_XFERSIZE_SHIFT);
- dev_vdbg(hsotg->dev, " Num Pkts: %d\n",
- (hctsiz & TSIZ_PKTCNT_MASK) >>
- TSIZ_PKTCNT_SHIFT);
- dev_vdbg(hsotg->dev, " Start PID: %d\n",
- (hctsiz & TSIZ_SC_MC_PID_MASK) >>
- TSIZ_SC_MC_PID_SHIFT);
- }
-
- if (hsotg->core_params->dma_enable > 0) {
- dma_addr_t dma_addr;
-
- if (chan->align_buf) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "align_buf\n");
- dma_addr = chan->align_buf;
- } else {
- dma_addr = chan->xfer_dma;
- }
- writel((u32)dma_addr, hsotg->regs + HCDMA(chan->hc_num));
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "Wrote %08lx to HCDMA(%d)\n",
- (unsigned long)dma_addr, chan->hc_num);
- }
-
- /* Start the split */
- if (chan->do_split) {
- u32 hcsplt = readl(hsotg->regs + HCSPLT(chan->hc_num));
-
- hcsplt |= HCSPLT_SPLTENA;
- writel(hcsplt, hsotg->regs + HCSPLT(chan->hc_num));
- }
-
- hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
- hcchar &= ~HCCHAR_MULTICNT_MASK;
- hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT &
- HCCHAR_MULTICNT_MASK;
- dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
-
- if (hcchar & HCCHAR_CHDIS)
- dev_warn(hsotg->dev,
- "%s: chdis set, channel %d, hcchar 0x%08x\n",
- __func__, chan->hc_num, hcchar);
-
- /* Set host channel enable after all other setup is complete */
- hcchar |= HCCHAR_CHENA;
- hcchar &= ~HCCHAR_CHDIS;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
- (hcchar & HCCHAR_MULTICNT_MASK) >>
- HCCHAR_MULTICNT_SHIFT);
-
- writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
- chan->hc_num);
-
- chan->xfer_started = 1;
- chan->requests++;
-
- if (hsotg->core_params->dma_enable <= 0 &&
- !chan->ep_is_in && chan->xfer_len > 0)
- /* Load OUT packet into the appropriate Tx FIFO */
- dwc2_hc_write_packet(hsotg, chan);
-}
-
-/**
- * dwc2_hc_start_transfer_ddma() - Does the setup for a data transfer for a
- * host channel and starts the transfer in Descriptor DMA mode
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Information needed to initialize the host channel
- *
- * Initializes HCTSIZ register. For a PING transfer the Do Ping bit is set.
- * Sets PID and NTD values. For periodic transfers initializes SCHED_INFO field
- * with micro-frame bitmap.
- *
- * Initializes HCDMA register with descriptor list address and CTD value then
- * starts the transfer via enabling the channel.
- */
-void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
- u32 hcchar;
- u32 hc_dma;
- u32 hctsiz = 0;
-
- if (chan->do_ping)
- hctsiz |= TSIZ_DOPNG;
-
- if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
- dwc2_set_pid_isoc(chan);
-
- /* Packet Count and Xfer Size are not used in Descriptor DMA mode */
- hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
- TSIZ_SC_MC_PID_MASK;
-
- /* 0 - 1 descriptor, 1 - 2 descriptors, etc */
- hctsiz |= (chan->ntd - 1) << TSIZ_NTD_SHIFT & TSIZ_NTD_MASK;
-
- /* Non-zero only for high-speed interrupt endpoints */
- hctsiz |= chan->schinfo << TSIZ_SCHINFO_SHIFT & TSIZ_SCHINFO_MASK;
-
- if (dbg_hc(chan)) {
- dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
- chan->hc_num);
- dev_vdbg(hsotg->dev, " Start PID: %d\n",
- chan->data_pid_start);
- dev_vdbg(hsotg->dev, " NTD: %d\n", chan->ntd - 1);
- }
-
- writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
-
- hc_dma = (u32)chan->desc_list_addr & HCDMA_DMA_ADDR_MASK;
-
- /* Always start from first descriptor */
- hc_dma &= ~HCDMA_CTD_MASK;
- writel(hc_dma, hsotg->regs + HCDMA(chan->hc_num));
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "Wrote %08x to HCDMA(%d)\n",
- hc_dma, chan->hc_num);
-
- hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
- hcchar &= ~HCCHAR_MULTICNT_MASK;
- hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT &
- HCCHAR_MULTICNT_MASK;
-
- if (hcchar & HCCHAR_CHDIS)
- dev_warn(hsotg->dev,
- "%s: chdis set, channel %d, hcchar 0x%08x\n",
- __func__, chan->hc_num, hcchar);
-
- /* Set host channel enable after all other setup is complete */
- hcchar |= HCCHAR_CHENA;
- hcchar &= ~HCCHAR_CHDIS;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
- (hcchar & HCCHAR_MULTICNT_MASK) >>
- HCCHAR_MULTICNT_SHIFT);
-
- writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
- chan->hc_num);
-
- chan->xfer_started = 1;
- chan->requests++;
-}
-
-/**
- * dwc2_hc_continue_transfer() - Continues a data transfer that was started by
- * a previous call to dwc2_hc_start_transfer()
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Information needed to initialize the host channel
- *
- * The caller must ensure there is sufficient space in the request queue and Tx
- * Data FIFO. This function should only be called in Slave mode. In DMA mode,
- * the controller acts autonomously to complete transfers programmed to a host
- * channel.
- *
- * For an OUT transfer, a new data packet is loaded into the appropriate FIFO
- * if there is any data remaining to be queued. For an IN transfer, another
- * data packet is always requested. For the SETUP phase of a control transfer,
- * this function does nothing.
- *
- * Return: 1 if a new request is queued, 0 if no more requests are required
- * for this transfer
- */
-int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
- chan->hc_num);
-
- if (chan->do_split)
- /* SPLITs always queue just once per channel */
- return 0;
-
- if (chan->data_pid_start == DWC2_HC_PID_SETUP)
- /* SETUPs are queued only once since they can't be NAK'd */
- return 0;
-
- if (chan->ep_is_in) {
- /*
- * Always queue another request for other IN transfers. If
- * back-to-back INs are issued and NAKs are received for both,
- * the driver may still be processing the first NAK when the
- * second NAK is received. When the interrupt handler clears
- * the NAK interrupt for the first NAK, the second NAK will
- * not be seen. So we can't depend on the NAK interrupt
- * handler to requeue a NAK'd request. Instead, IN requests
- * are issued each time this function is called. When the
- * transfer completes, the extra requests for the channel will
- * be flushed.
- */
- u32 hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
-
- dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
- hcchar |= HCCHAR_CHENA;
- hcchar &= ~HCCHAR_CHDIS;
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, " IN xfer: hcchar = 0x%08x\n",
- hcchar);
- writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
- chan->requests++;
- return 1;
- }
-
- /* OUT transfers */
-
- if (chan->xfer_count < chan->xfer_len) {
- if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
- u32 hcchar = readl(hsotg->regs +
- HCCHAR(chan->hc_num));
-
- dwc2_hc_set_even_odd_frame(hsotg, chan,
- &hcchar);
- }
-
- /* Load OUT packet into the appropriate Tx FIFO */
- dwc2_hc_write_packet(hsotg, chan);
- chan->requests++;
- return 1;
- }
-
- return 0;
-}
-
-/**
- * dwc2_hc_do_ping() - Starts a PING transfer
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Information needed to initialize the host channel
- *
- * This function should only be called in Slave mode. The Do Ping bit is set in
- * the HCTSIZ register, then the channel is enabled.
- */
-void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
-{
- u32 hcchar;
- u32 hctsiz;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
- chan->hc_num);
-
-
- hctsiz = TSIZ_DOPNG;
- hctsiz |= 1 << TSIZ_PKTCNT_SHIFT;
- writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
-
- hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
- hcchar |= HCCHAR_CHENA;
- hcchar &= ~HCCHAR_CHDIS;
- writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
-}
-
-/**
- * dwc2_calc_frame_interval() - Calculates the correct frame Interval value for
- * the HFIR register according to PHY type and speed
- *
- * @hsotg: Programming view of DWC_otg controller
- *
- * NOTE: The caller can modify the value of the HFIR register only after the
- * Port Enable bit of the Host Port Control and Status register (HPRT.EnaPort)
- * has been set
- */
-u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg)
-{
- u32 usbcfg;
- u32 hprt0;
- int clock = 60; /* default value */
-
- usbcfg = readl(hsotg->regs + GUSBCFG);
- hprt0 = readl(hsotg->regs + HPRT0);
-
- if (!(usbcfg & GUSBCFG_PHYSEL) && (usbcfg & GUSBCFG_ULPI_UTMI_SEL) &&
- !(usbcfg & GUSBCFG_PHYIF16))
- clock = 60;
- if ((usbcfg & GUSBCFG_PHYSEL) && hsotg->hw_params.fs_phy_type ==
- GHWCFG2_FS_PHY_TYPE_SHARED_ULPI)
- clock = 48;
- if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
- !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
- clock = 30;
- if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
- !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && !(usbcfg & GUSBCFG_PHYIF16))
- clock = 60;
- if ((usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
- !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
- clock = 48;
- if ((usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_PHYIF16) &&
- hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_SHARED_UTMI)
- clock = 48;
- if ((usbcfg & GUSBCFG_PHYSEL) &&
- hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
- clock = 48;
-
- if ((hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT == HPRT0_SPD_HIGH_SPEED)
- /* High speed case */
- return 125 * clock;
- else
- /* FS/LS case */
- return 1000 * clock;
-}
-
-/**
- * dwc2_read_packet() - Reads a packet from the Rx FIFO into the destination
- * buffer
- *
- * @core_if: Programming view of DWC_otg controller
- * @dest: Destination buffer for the packet
- * @bytes: Number of bytes to copy to the destination
- */
-void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes)
-{
- u32 __iomem *fifo = hsotg->regs + HCFIFO(0);
- u32 *data_buf = (u32 *)dest;
- int word_count = (bytes + 3) / 4;
- int i;
-
- /*
- * Todo: Account for the case where dest is not dword aligned. This
- * requires reading data from the FIFO into a u32 temp buffer, then
- * moving it into the data buffer.
- */
-
- dev_vdbg(hsotg->dev, "%s(%p,%p,%d)\n", __func__, hsotg, dest, bytes);
-
- for (i = 0; i < word_count; i++, data_buf++)
- *data_buf = readl(fifo);
-}
-
-/**
- * dwc2_dump_host_registers() - Prints the host registers
- *
- * @hsotg: Programming view of DWC_otg controller
- *
- * NOTE: This function will be removed once the peripheral controller code
- * is integrated and the driver is stable
- */
-void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg)
-{
-#ifdef DEBUG
- u32 __iomem *addr;
- int i;
-
- dev_dbg(hsotg->dev, "Host Global Registers\n");
- addr = hsotg->regs + HCFG;
- dev_dbg(hsotg->dev, "HCFG @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HFIR;
- dev_dbg(hsotg->dev, "HFIR @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HFNUM;
- dev_dbg(hsotg->dev, "HFNUM @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HPTXSTS;
- dev_dbg(hsotg->dev, "HPTXSTS @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HAINT;
- dev_dbg(hsotg->dev, "HAINT @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HAINTMSK;
- dev_dbg(hsotg->dev, "HAINTMSK @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- if (hsotg->core_params->dma_desc_enable > 0) {
- addr = hsotg->regs + HFLBADDR;
- dev_dbg(hsotg->dev, "HFLBADDR @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- }
-
- addr = hsotg->regs + HPRT0;
- dev_dbg(hsotg->dev, "HPRT0 @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
-
- for (i = 0; i < hsotg->core_params->host_channels; i++) {
- dev_dbg(hsotg->dev, "Host Channel %d Specific Registers\n", i);
- addr = hsotg->regs + HCCHAR(i);
- dev_dbg(hsotg->dev, "HCCHAR @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HCSPLT(i);
- dev_dbg(hsotg->dev, "HCSPLT @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HCINT(i);
- dev_dbg(hsotg->dev, "HCINT @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HCINTMSK(i);
- dev_dbg(hsotg->dev, "HCINTMSK @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HCTSIZ(i);
- dev_dbg(hsotg->dev, "HCTSIZ @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HCDMA(i);
- dev_dbg(hsotg->dev, "HCDMA @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- if (hsotg->core_params->dma_desc_enable > 0) {
- addr = hsotg->regs + HCDMAB(i);
- dev_dbg(hsotg->dev, "HCDMAB @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- }
- }
-#endif
-}
-
-/**
- * dwc2_dump_global_registers() - Prints the core global registers
- *
- * @hsotg: Programming view of DWC_otg controller
- *
- * NOTE: This function will be removed once the peripheral controller code
- * is integrated and the driver is stable
- */
-void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg)
-{
-#ifdef DEBUG
- u32 __iomem *addr;
-
- dev_dbg(hsotg->dev, "Core Global Registers\n");
- addr = hsotg->regs + GOTGCTL;
- dev_dbg(hsotg->dev, "GOTGCTL @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GOTGINT;
- dev_dbg(hsotg->dev, "GOTGINT @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GAHBCFG;
- dev_dbg(hsotg->dev, "GAHBCFG @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GUSBCFG;
- dev_dbg(hsotg->dev, "GUSBCFG @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GRSTCTL;
- dev_dbg(hsotg->dev, "GRSTCTL @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GINTSTS;
- dev_dbg(hsotg->dev, "GINTSTS @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GINTMSK;
- dev_dbg(hsotg->dev, "GINTMSK @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GRXSTSR;
- dev_dbg(hsotg->dev, "GRXSTSR @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GRXFSIZ;
- dev_dbg(hsotg->dev, "GRXFSIZ @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GNPTXFSIZ;
- dev_dbg(hsotg->dev, "GNPTXFSIZ @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GNPTXSTS;
- dev_dbg(hsotg->dev, "GNPTXSTS @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GI2CCTL;
- dev_dbg(hsotg->dev, "GI2CCTL @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GPVNDCTL;
- dev_dbg(hsotg->dev, "GPVNDCTL @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GGPIO;
- dev_dbg(hsotg->dev, "GGPIO @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GUID;
- dev_dbg(hsotg->dev, "GUID @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GSNPSID;
- dev_dbg(hsotg->dev, "GSNPSID @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GHWCFG1;
- dev_dbg(hsotg->dev, "GHWCFG1 @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GHWCFG2;
- dev_dbg(hsotg->dev, "GHWCFG2 @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GHWCFG3;
- dev_dbg(hsotg->dev, "GHWCFG3 @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GHWCFG4;
- dev_dbg(hsotg->dev, "GHWCFG4 @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GLPMCFG;
- dev_dbg(hsotg->dev, "GLPMCFG @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GPWRDN;
- dev_dbg(hsotg->dev, "GPWRDN @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + GDFIFOCFG;
- dev_dbg(hsotg->dev, "GDFIFOCFG @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
- addr = hsotg->regs + HPTXFSIZ;
- dev_dbg(hsotg->dev, "HPTXFSIZ @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
-
- addr = hsotg->regs + PCGCTL;
- dev_dbg(hsotg->dev, "PCGCTL @0x%08lX : 0x%08X\n",
- (unsigned long)addr, readl(addr));
-#endif
-}
-
-/**
- * dwc2_flush_tx_fifo() - Flushes a Tx FIFO
- *
- * @hsotg: Programming view of DWC_otg controller
- * @num: Tx FIFO to flush
- */
-void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num)
-{
- u32 greset;
- int count = 0;
-
- dev_vdbg(hsotg->dev, "Flush Tx FIFO %d\n", num);
-
- greset = GRSTCTL_TXFFLSH;
- greset |= num << GRSTCTL_TXFNUM_SHIFT & GRSTCTL_TXFNUM_MASK;
- writel(greset, hsotg->regs + GRSTCTL);
-
- do {
- greset = readl(hsotg->regs + GRSTCTL);
- if (++count > 10000) {
- dev_warn(hsotg->dev,
- "%s() HANG! GRSTCTL=%0x GNPTXSTS=0x%08x\n",
- __func__, greset,
- readl(hsotg->regs + GNPTXSTS));
- break;
- }
- udelay(1);
- } while (greset & GRSTCTL_TXFFLSH);
-
- /* Wait for at least 3 PHY Clocks */
- udelay(1);
-}
-
-/**
- * dwc2_flush_rx_fifo() - Flushes the Rx FIFO
- *
- * @hsotg: Programming view of DWC_otg controller
- */
-void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg)
-{
- u32 greset;
- int count = 0;
-
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- greset = GRSTCTL_RXFFLSH;
- writel(greset, hsotg->regs + GRSTCTL);
-
- do {
- greset = readl(hsotg->regs + GRSTCTL);
- if (++count > 10000) {
- dev_warn(hsotg->dev, "%s() HANG! GRSTCTL=%0x\n",
- __func__, greset);
- break;
- }
- udelay(1);
- } while (greset & GRSTCTL_RXFFLSH);
-
- /* Wait for at least 3 PHY Clocks */
- udelay(1);
-}
-
-#define DWC2_OUT_OF_BOUNDS(a, b, c) ((a) < (b) || (a) > (c))
-
-/* Parameter access functions */
-void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- switch (val) {
- case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
- if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
- valid = 0;
- break;
- case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
- switch (hsotg->hw_params.op_mode) {
- case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
- case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
- case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
- case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
- break;
- default:
- valid = 0;
- break;
- }
- break;
- case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
- /* always valid */
- break;
- default:
- valid = 0;
- break;
- }
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for otg_cap parameter. Check HW configuration.\n",
- val);
- switch (hsotg->hw_params.op_mode) {
- case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
- val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
- break;
- case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
- case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
- case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
- val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
- break;
- default:
- val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
- break;
- }
- dev_dbg(hsotg->dev, "Setting otg_cap to %d\n", val);
- }
-
- hsotg->core_params->otg_cap = val;
-}
-
-void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val > 0 && hsotg->hw_params.arch == GHWCFG2_SLAVE_ONLY_ARCH)
- valid = 0;
- if (val < 0)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for dma_enable parameter. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.arch != GHWCFG2_SLAVE_ONLY_ARCH;
- dev_dbg(hsotg->dev, "Setting dma_enable to %d\n", val);
- }
-
- hsotg->core_params->dma_enable = val;
-}
-
-void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val > 0 && (hsotg->core_params->dma_enable <= 0 ||
- !hsotg->hw_params.dma_desc_enable))
- valid = 0;
- if (val < 0)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for dma_desc_enable parameter. Check HW configuration.\n",
- val);
- val = (hsotg->core_params->dma_enable > 0 &&
- hsotg->hw_params.dma_desc_enable);
- dev_dbg(hsotg->dev, "Setting dma_desc_enable to %d\n", val);
- }
-
- hsotg->core_params->dma_desc_enable = val;
-}
-
-void dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg,
- int val)
-{
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "Wrong value for host_support_fs_low_power\n");
- dev_err(hsotg->dev,
- "host_support_fs_low_power must be 0 or 1\n");
- }
- val = 0;
- dev_dbg(hsotg->dev,
- "Setting host_support_fs_low_power to %d\n", val);
- }
-
- hsotg->core_params->host_support_fs_ls_low_power = val;
-}
-
-void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val > 0 && !hsotg->hw_params.enable_dynamic_fifo)
- valid = 0;
- if (val < 0)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for enable_dynamic_fifo parameter. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.enable_dynamic_fifo;
- dev_dbg(hsotg->dev, "Setting enable_dynamic_fifo to %d\n", val);
- }
-
- hsotg->core_params->enable_dynamic_fifo = val;
-}
-
-void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val < 16 || val > hsotg->hw_params.host_rx_fifo_size)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for host_rx_fifo_size. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.host_rx_fifo_size;
- dev_dbg(hsotg->dev, "Setting host_rx_fifo_size to %d\n", val);
- }
-
- hsotg->core_params->host_rx_fifo_size = val;
-}
-
-void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val < 16 || val > hsotg->hw_params.host_nperio_tx_fifo_size)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for host_nperio_tx_fifo_size. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.host_nperio_tx_fifo_size;
- dev_dbg(hsotg->dev, "Setting host_nperio_tx_fifo_size to %d\n",
- val);
- }
-
- hsotg->core_params->host_nperio_tx_fifo_size = val;
-}
-
-void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val < 16 || val > hsotg->hw_params.host_perio_tx_fifo_size)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for host_perio_tx_fifo_size. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.host_perio_tx_fifo_size;
- dev_dbg(hsotg->dev, "Setting host_perio_tx_fifo_size to %d\n",
- val);
- }
-
- hsotg->core_params->host_perio_tx_fifo_size = val;
-}
-
-void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val < 2047 || val > hsotg->hw_params.max_transfer_size)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for max_transfer_size. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.max_transfer_size;
- dev_dbg(hsotg->dev, "Setting max_transfer_size to %d\n", val);
- }
-
- hsotg->core_params->max_transfer_size = val;
-}
-
-void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val < 15 || val > hsotg->hw_params.max_packet_count)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for max_packet_count. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.max_packet_count;
- dev_dbg(hsotg->dev, "Setting max_packet_count to %d\n", val);
- }
-
- hsotg->core_params->max_packet_count = val;
-}
-
-void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (val < 1 || val > hsotg->hw_params.host_channels)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for host_channels. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.host_channels;
- dev_dbg(hsotg->dev, "Setting host_channels to %d\n", val);
- }
-
- hsotg->core_params->host_channels = val;
-}
-
-void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 0;
- u32 hs_phy_type, fs_phy_type;
-
- if (DWC2_OUT_OF_BOUNDS(val, DWC2_PHY_TYPE_PARAM_FS,
- DWC2_PHY_TYPE_PARAM_ULPI)) {
- if (val >= 0) {
- dev_err(hsotg->dev, "Wrong value for phy_type\n");
- dev_err(hsotg->dev, "phy_type must be 0, 1 or 2\n");
- }
-
- valid = 0;
- }
-
- hs_phy_type = hsotg->hw_params.hs_phy_type;
- fs_phy_type = hsotg->hw_params.fs_phy_type;
- if (val == DWC2_PHY_TYPE_PARAM_UTMI &&
- (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
- hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
- valid = 1;
- else if (val == DWC2_PHY_TYPE_PARAM_ULPI &&
- (hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI ||
- hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
- valid = 1;
- else if (val == DWC2_PHY_TYPE_PARAM_FS &&
- fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
- valid = 1;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for phy_type. Check HW configuration.\n",
- val);
- val = DWC2_PHY_TYPE_PARAM_FS;
- if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
- if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
- hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
- val = DWC2_PHY_TYPE_PARAM_UTMI;
- else
- val = DWC2_PHY_TYPE_PARAM_ULPI;
- }
- dev_dbg(hsotg->dev, "Setting phy_type to %d\n", val);
- }
-
- hsotg->core_params->phy_type = val;
-}
-
-static int dwc2_get_param_phy_type(struct dwc2_hsotg *hsotg)
-{
- return hsotg->core_params->phy_type;
-}
-
-void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev, "Wrong value for speed parameter\n");
- dev_err(hsotg->dev, "max_speed parameter must be 0 or 1\n");
- }
- valid = 0;
- }
-
- if (val == DWC2_SPEED_PARAM_HIGH &&
- dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for speed parameter. Check HW configuration.\n",
- val);
- val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS ?
- DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
- dev_dbg(hsotg->dev, "Setting speed to %d\n", val);
- }
-
- hsotg->core_params->speed = val;
-}
-
-void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (DWC2_OUT_OF_BOUNDS(val, DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ,
- DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ)) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "Wrong value for host_ls_low_power_phy_clk parameter\n");
- dev_err(hsotg->dev,
- "host_ls_low_power_phy_clk must be 0 or 1\n");
- }
- valid = 0;
- }
-
- if (val == DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ &&
- dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for host_ls_low_power_phy_clk. Check HW configuration.\n",
- val);
- val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS
- ? DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ
- : DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ;
- dev_dbg(hsotg->dev, "Setting host_ls_low_power_phy_clk to %d\n",
- val);
- }
-
- hsotg->core_params->host_ls_low_power_phy_clk = val;
-}
-
-void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val)
-{
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev, "Wrong value for phy_ulpi_ddr\n");
- dev_err(hsotg->dev, "phy_upli_ddr must be 0 or 1\n");
- }
- val = 0;
- dev_dbg(hsotg->dev, "Setting phy_upli_ddr to %d\n", val);
- }
-
- hsotg->core_params->phy_ulpi_ddr = val;
-}
-
-void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val)
-{
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "Wrong value for phy_ulpi_ext_vbus\n");
- dev_err(hsotg->dev,
- "phy_ulpi_ext_vbus must be 0 or 1\n");
- }
- val = 0;
- dev_dbg(hsotg->dev, "Setting phy_ulpi_ext_vbus to %d\n", val);
- }
-
- hsotg->core_params->phy_ulpi_ext_vbus = val;
-}
-
-void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 0;
-
- switch (hsotg->hw_params.utmi_phy_data_width) {
- case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
- valid = (val == 8);
- break;
- case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
- valid = (val == 16);
- break;
- case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
- valid = (val == 8 || val == 16);
- break;
- }
-
- if (!valid) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "%d invalid for phy_utmi_width. Check HW configuration.\n",
- val);
- }
- val = (hsotg->hw_params.utmi_phy_data_width ==
- GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
- dev_dbg(hsotg->dev, "Setting phy_utmi_width to %d\n", val);
- }
-
- hsotg->core_params->phy_utmi_width = val;
-}
-
-void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val)
-{
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev, "Wrong value for ulpi_fs_ls\n");
- dev_err(hsotg->dev, "ulpi_fs_ls must be 0 or 1\n");
- }
- val = 0;
- dev_dbg(hsotg->dev, "Setting ulpi_fs_ls to %d\n", val);
- }
-
- hsotg->core_params->ulpi_fs_ls = val;
-}
-
-void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val)
-{
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev, "Wrong value for ts_dline\n");
- dev_err(hsotg->dev, "ts_dline must be 0 or 1\n");
- }
- val = 0;
- dev_dbg(hsotg->dev, "Setting ts_dline to %d\n", val);
- }
-
- hsotg->core_params->ts_dline = val;
-}
-
-void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev, "Wrong value for i2c_enable\n");
- dev_err(hsotg->dev, "i2c_enable must be 0 or 1\n");
- }
-
- valid = 0;
- }
-
- if (val == 1 && !(hsotg->hw_params.i2c_enable))
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for i2c_enable. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.i2c_enable;
- dev_dbg(hsotg->dev, "Setting i2c_enable to %d\n", val);
- }
-
- hsotg->core_params->i2c_enable = val;
-}
-
-void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "Wrong value for en_multiple_tx_fifo,\n");
- dev_err(hsotg->dev,
- "en_multiple_tx_fifo must be 0 or 1\n");
- }
- valid = 0;
- }
-
- if (val == 1 && !hsotg->hw_params.en_multiple_tx_fifo)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for parameter en_multiple_tx_fifo. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.en_multiple_tx_fifo;
- dev_dbg(hsotg->dev, "Setting en_multiple_tx_fifo to %d\n", val);
- }
-
- hsotg->core_params->en_multiple_tx_fifo = val;
-}
-
-void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val)
-{
- int valid = 1;
-
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "'%d' invalid for parameter reload_ctl\n", val);
- dev_err(hsotg->dev, "reload_ctl must be 0 or 1\n");
- }
- valid = 0;
- }
-
- if (val == 1 && hsotg->hw_params.snpsid < DWC2_CORE_REV_2_92a)
- valid = 0;
-
- if (!valid) {
- if (val >= 0)
- dev_err(hsotg->dev,
- "%d invalid for parameter reload_ctl. Check HW configuration.\n",
- val);
- val = hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_92a;
- dev_dbg(hsotg->dev, "Setting reload_ctl to %d\n", val);
- }
-
- hsotg->core_params->reload_ctl = val;
-}
-
-void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
-{
- if (val != -1)
- hsotg->core_params->ahbcfg = val;
- else
- hsotg->core_params->ahbcfg = GAHBCFG_HBSTLEN_INCR4 <<
- GAHBCFG_HBSTLEN_SHIFT;
-}
-
-void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val)
-{
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "'%d' invalid for parameter otg_ver\n", val);
- dev_err(hsotg->dev,
- "otg_ver must be 0 (for OTG 1.3 support) or 1 (for OTG 2.0 support)\n");
- }
- val = 0;
- dev_dbg(hsotg->dev, "Setting otg_ver to %d\n", val);
- }
-
- hsotg->core_params->otg_ver = val;
-}
-
-static void dwc2_set_param_uframe_sched(struct dwc2_hsotg *hsotg, int val)
-{
- if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
- if (val >= 0) {
- dev_err(hsotg->dev,
- "'%d' invalid for parameter uframe_sched\n",
- val);
- dev_err(hsotg->dev, "uframe_sched must be 0 or 1\n");
- }
- val = 1;
- dev_dbg(hsotg->dev, "Setting uframe_sched to %d\n", val);
- }
-
- hsotg->core_params->uframe_sched = val;
-}
-
-/*
- * This function is called during module intialization to pass module parameters
- * for the DWC_otg core.
- */
-void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
- const struct dwc2_core_params *params)
-{
- dev_dbg(hsotg->dev, "%s()\n", __func__);
-
- dwc2_set_param_otg_cap(hsotg, params->otg_cap);
- dwc2_set_param_dma_enable(hsotg, params->dma_enable);
- dwc2_set_param_dma_desc_enable(hsotg, params->dma_desc_enable);
- dwc2_set_param_host_support_fs_ls_low_power(hsotg,
- params->host_support_fs_ls_low_power);
- dwc2_set_param_enable_dynamic_fifo(hsotg,
- params->enable_dynamic_fifo);
- dwc2_set_param_host_rx_fifo_size(hsotg,
- params->host_rx_fifo_size);
- dwc2_set_param_host_nperio_tx_fifo_size(hsotg,
- params->host_nperio_tx_fifo_size);
- dwc2_set_param_host_perio_tx_fifo_size(hsotg,
- params->host_perio_tx_fifo_size);
- dwc2_set_param_max_transfer_size(hsotg,
- params->max_transfer_size);
- dwc2_set_param_max_packet_count(hsotg,
- params->max_packet_count);
- dwc2_set_param_host_channels(hsotg, params->host_channels);
- dwc2_set_param_phy_type(hsotg, params->phy_type);
- dwc2_set_param_speed(hsotg, params->speed);
- dwc2_set_param_host_ls_low_power_phy_clk(hsotg,
- params->host_ls_low_power_phy_clk);
- dwc2_set_param_phy_ulpi_ddr(hsotg, params->phy_ulpi_ddr);
- dwc2_set_param_phy_ulpi_ext_vbus(hsotg,
- params->phy_ulpi_ext_vbus);
- dwc2_set_param_phy_utmi_width(hsotg, params->phy_utmi_width);
- dwc2_set_param_ulpi_fs_ls(hsotg, params->ulpi_fs_ls);
- dwc2_set_param_ts_dline(hsotg, params->ts_dline);
- dwc2_set_param_i2c_enable(hsotg, params->i2c_enable);
- dwc2_set_param_en_multiple_tx_fifo(hsotg,
- params->en_multiple_tx_fifo);
- dwc2_set_param_reload_ctl(hsotg, params->reload_ctl);
- dwc2_set_param_ahbcfg(hsotg, params->ahbcfg);
- dwc2_set_param_otg_ver(hsotg, params->otg_ver);
- dwc2_set_param_uframe_sched(hsotg, params->uframe_sched);
-}
-
-/**
- * During device initialization, read various hardware configuration
- * registers and interpret the contents.
- */
-int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
-{
- struct dwc2_hw_params *hw = &hsotg->hw_params;
- unsigned width;
- u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
- u32 hptxfsiz, grxfsiz, gnptxfsiz;
- u32 gusbcfg;
-
- /*
- * Attempt to ensure this device is really a DWC_otg Controller.
- * Read and verify the GSNPSID register contents. The value should be
- * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3",
- * as in "OTG version 2.xx" or "OTG version 3.xx".
- */
- hw->snpsid = readl(hsotg->regs + GSNPSID);
- if ((hw->snpsid & 0xfffff000) != 0x4f542000 &&
- (hw->snpsid & 0xfffff000) != 0x4f543000) {
- dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
- hw->snpsid);
- return -ENODEV;
- }
-
- dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
- hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
- hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
-
- hwcfg1 = readl(hsotg->regs + GHWCFG1);
- hwcfg2 = readl(hsotg->regs + GHWCFG2);
- hwcfg3 = readl(hsotg->regs + GHWCFG3);
- hwcfg4 = readl(hsotg->regs + GHWCFG4);
- gnptxfsiz = readl(hsotg->regs + GNPTXFSIZ);
- grxfsiz = readl(hsotg->regs + GRXFSIZ);
-
- dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hwcfg1);
- dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hwcfg2);
- dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hwcfg3);
- dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hwcfg4);
- dev_dbg(hsotg->dev, "gnptxfsiz=%08x\n", gnptxfsiz);
- dev_dbg(hsotg->dev, "grxfsiz=%08x\n", grxfsiz);
-
- /* Force host mode to get HPTXFSIZ exact power on value */
- gusbcfg = readl(hsotg->regs + GUSBCFG);
- gusbcfg |= GUSBCFG_FORCEHOSTMODE;
- writel(gusbcfg, hsotg->regs + GUSBCFG);
- usleep_range(100000, 150000);
-
- hptxfsiz = readl(hsotg->regs + HPTXFSIZ);
- dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hptxfsiz);
- gusbcfg = readl(hsotg->regs + GUSBCFG);
- gusbcfg &= ~GUSBCFG_FORCEHOSTMODE;
- writel(gusbcfg, hsotg->regs + GUSBCFG);
- usleep_range(100000, 150000);
-
- /* hwcfg2 */
- hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
- GHWCFG2_OP_MODE_SHIFT;
- hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
- GHWCFG2_ARCHITECTURE_SHIFT;
- hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
- hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
- GHWCFG2_NUM_HOST_CHAN_SHIFT);
- hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
- GHWCFG2_HS_PHY_TYPE_SHIFT;
- hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
- GHWCFG2_FS_PHY_TYPE_SHIFT;
- hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
- GHWCFG2_NUM_DEV_EP_SHIFT;
- hw->nperio_tx_q_depth =
- (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
- GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
- hw->host_perio_tx_q_depth =
- (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
- GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
- hw->dev_token_q_depth =
- (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
- GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
-
- /* hwcfg3 */
- width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
- GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
- hw->max_transfer_size = (1 << (width + 11)) - 1;
- width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
- GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
- hw->max_packet_count = (1 << (width + 4)) - 1;
- hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
- hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
- GHWCFG3_DFIFO_DEPTH_SHIFT;
-
- /* hwcfg4 */
- hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
- hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
- GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
- hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
- hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
- hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
- GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
-
- /* fifo sizes */
- hw->host_rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
- GRXFSIZ_DEPTH_SHIFT;
- hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
- FIFOSIZE_DEPTH_SHIFT;
- hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
- FIFOSIZE_DEPTH_SHIFT;
-
- dev_dbg(hsotg->dev, "Detected values from hardware:\n");
- dev_dbg(hsotg->dev, " op_mode=%d\n",
- hw->op_mode);
- dev_dbg(hsotg->dev, " arch=%d\n",
- hw->arch);
- dev_dbg(hsotg->dev, " dma_desc_enable=%d\n",
- hw->dma_desc_enable);
- dev_dbg(hsotg->dev, " power_optimized=%d\n",
- hw->power_optimized);
- dev_dbg(hsotg->dev, " i2c_enable=%d\n",
- hw->i2c_enable);
- dev_dbg(hsotg->dev, " hs_phy_type=%d\n",
- hw->hs_phy_type);
- dev_dbg(hsotg->dev, " fs_phy_type=%d\n",
- hw->fs_phy_type);
- dev_dbg(hsotg->dev, " utmi_phy_data_wdith=%d\n",
- hw->utmi_phy_data_width);
- dev_dbg(hsotg->dev, " num_dev_ep=%d\n",
- hw->num_dev_ep);
- dev_dbg(hsotg->dev, " num_dev_perio_in_ep=%d\n",
- hw->num_dev_perio_in_ep);
- dev_dbg(hsotg->dev, " host_channels=%d\n",
- hw->host_channels);
- dev_dbg(hsotg->dev, " max_transfer_size=%d\n",
- hw->max_transfer_size);
- dev_dbg(hsotg->dev, " max_packet_count=%d\n",
- hw->max_packet_count);
- dev_dbg(hsotg->dev, " nperio_tx_q_depth=0x%0x\n",
- hw->nperio_tx_q_depth);
- dev_dbg(hsotg->dev, " host_perio_tx_q_depth=0x%0x\n",
- hw->host_perio_tx_q_depth);
- dev_dbg(hsotg->dev, " dev_token_q_depth=0x%0x\n",
- hw->dev_token_q_depth);
- dev_dbg(hsotg->dev, " enable_dynamic_fifo=%d\n",
- hw->enable_dynamic_fifo);
- dev_dbg(hsotg->dev, " en_multiple_tx_fifo=%d\n",
- hw->en_multiple_tx_fifo);
- dev_dbg(hsotg->dev, " total_fifo_size=%d\n",
- hw->total_fifo_size);
- dev_dbg(hsotg->dev, " host_rx_fifo_size=%d\n",
- hw->host_rx_fifo_size);
- dev_dbg(hsotg->dev, " host_nperio_tx_fifo_size=%d\n",
- hw->host_nperio_tx_fifo_size);
- dev_dbg(hsotg->dev, " host_perio_tx_fifo_size=%d\n",
- hw->host_perio_tx_fifo_size);
- dev_dbg(hsotg->dev, "\n");
-
- return 0;
-}
-
-u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg)
-{
- return hsotg->core_params->otg_ver == 1 ? 0x0200 : 0x0103;
-}
-
-bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg)
-{
- if (readl(hsotg->regs + GSNPSID) == 0xffffffff)
- return false;
- else
- return true;
-}
-
-/**
- * dwc2_enable_global_interrupts() - Enables the controller's Global
- * Interrupt in the AHB Config register
- *
- * @hsotg: Programming view of DWC_otg controller
- */
-void dwc2_enable_global_interrupts(struct dwc2_hsotg *hsotg)
-{
- u32 ahbcfg = readl(hsotg->regs + GAHBCFG);
-
- ahbcfg |= GAHBCFG_GLBL_INTR_EN;
- writel(ahbcfg, hsotg->regs + GAHBCFG);
-}
-
-/**
- * dwc2_disable_global_interrupts() - Disables the controller's Global
- * Interrupt in the AHB Config register
- *
- * @hsotg: Programming view of DWC_otg controller
- */
-void dwc2_disable_global_interrupts(struct dwc2_hsotg *hsotg)
-{
- u32 ahbcfg = readl(hsotg->regs + GAHBCFG);
-
- ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
- writel(ahbcfg, hsotg->regs + GAHBCFG);
-}
-
-MODULE_DESCRIPTION("DESIGNWARE HS OTG Core");
-MODULE_AUTHOR("Synopsys, Inc.");
-MODULE_LICENSE("Dual BSD/GPL");
+++ /dev/null
-/*
- * core.h - DesignWare HS OTG Controller common declarations
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef __DWC2_CORE_H__
-#define __DWC2_CORE_H__
-
-#include <linux/usb/phy.h>
-#include "hw.h"
-
-#ifdef DWC2_LOG_WRITES
-static inline void do_write(u32 value, void *addr)
-{
- writel(value, addr);
- pr_info("INFO:: wrote %08x to %p\n", value, addr);
-}
-
-#undef writel
-#define writel(v, a) do_write(v, a)
-#endif
-
-/* Maximum number of Endpoints/HostChannels */
-#define MAX_EPS_CHANNELS 16
-
-struct dwc2_hsotg;
-struct dwc2_host_chan;
-
-/* Device States */
-enum dwc2_lx_state {
- DWC2_L0, /* On state */
- DWC2_L1, /* LPM sleep state */
- DWC2_L2, /* USB suspend state */
- DWC2_L3, /* Off state */
-};
-
-/**
- * struct dwc2_core_params - Parameters for configuring the core
- *
- * @otg_cap: Specifies the OTG capabilities.
- * 0 - HNP and SRP capable
- * 1 - SRP Only capable
- * 2 - No HNP/SRP capable (always available)
- * Defaults to best available option (0, 1, then 2)
- * @otg_ver: OTG version supported
- * 0 - 1.3 (default)
- * 1 - 2.0
- * @dma_enable: Specifies whether to use slave or DMA mode for accessing
- * the data FIFOs. The driver will automatically detect the
- * value for this parameter if none is specified.
- * 0 - Slave (always available)
- * 1 - DMA (default, if available)
- * @dma_desc_enable: When DMA mode is enabled, specifies whether to use
- * address DMA mode or descriptor DMA mode for accessing
- * the data FIFOs. The driver will automatically detect the
- * value for this if none is specified.
- * 0 - Address DMA
- * 1 - Descriptor DMA (default, if available)
- * @speed: Specifies the maximum speed of operation in host and
- * device mode. The actual speed depends on the speed of
- * the attached device and the value of phy_type.
- * 0 - High Speed
- * (default when phy_type is UTMI+ or ULPI)
- * 1 - Full Speed
- * (default when phy_type is Full Speed)
- * @enable_dynamic_fifo: 0 - Use coreConsultant-specified FIFO size parameters
- * 1 - Allow dynamic FIFO sizing (default, if available)
- * @en_multiple_tx_fifo: Specifies whether dedicated per-endpoint transmit FIFOs
- * are enabled
- * @host_rx_fifo_size: Number of 4-byte words in the Rx FIFO in host mode when
- * dynamic FIFO sizing is enabled
- * 16 to 32768
- * Actual maximum value is autodetected and also
- * the default.
- * @host_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO
- * in host mode when dynamic FIFO sizing is enabled
- * 16 to 32768
- * Actual maximum value is autodetected and also
- * the default.
- * @host_perio_tx_fifo_size: Number of 4-byte words in the periodic Tx FIFO in
- * host mode when dynamic FIFO sizing is enabled
- * 16 to 32768
- * Actual maximum value is autodetected and also
- * the default.
- * @max_transfer_size: The maximum transfer size supported, in bytes
- * 2047 to 65,535
- * Actual maximum value is autodetected and also
- * the default.
- * @max_packet_count: The maximum number of packets in a transfer
- * 15 to 511
- * Actual maximum value is autodetected and also
- * the default.
- * @host_channels: The number of host channel registers to use
- * 1 to 16
- * Actual maximum value is autodetected and also
- * the default.
- * @phy_type: Specifies the type of PHY interface to use. By default,
- * the driver will automatically detect the phy_type.
- * 0 - Full Speed Phy
- * 1 - UTMI+ Phy
- * 2 - ULPI Phy
- * Defaults to best available option (2, 1, then 0)
- * @phy_utmi_width: Specifies the UTMI+ Data Width (in bits). This parameter
- * is applicable for a phy_type of UTMI+ or ULPI. (For a
- * ULPI phy_type, this parameter indicates the data width
- * between the MAC and the ULPI Wrapper.) Also, this
- * parameter is applicable only if the OTG_HSPHY_WIDTH cC
- * parameter was set to "8 and 16 bits", meaning that the
- * core has been configured to work at either data path
- * width.
- * 8 or 16 (default 16 if available)
- * @phy_ulpi_ddr: Specifies whether the ULPI operates at double or single
- * data rate. This parameter is only applicable if phy_type
- * is ULPI.
- * 0 - single data rate ULPI interface with 8 bit wide
- * data bus (default)
- * 1 - double data rate ULPI interface with 4 bit wide
- * data bus
- * @phy_ulpi_ext_vbus: For a ULPI phy, specifies whether to use the internal or
- * external supply to drive the VBus
- * 0 - Internal supply (default)
- * 1 - External supply
- * @i2c_enable: Specifies whether to use the I2Cinterface for a full
- * speed PHY. This parameter is only applicable if phy_type
- * is FS.
- * 0 - No (default)
- * 1 - Yes
- * @ulpi_fs_ls: Make ULPI phy operate in FS/LS mode only
- * 0 - No (default)
- * 1 - Yes
- * @host_support_fs_ls_low_power: Specifies whether low power mode is supported
- * when attached to a Full Speed or Low Speed device in
- * host mode.
- * 0 - Don't support low power mode (default)
- * 1 - Support low power mode
- * @host_ls_low_power_phy_clk: Specifies the PHY clock rate in low power mode
- * when connected to a Low Speed device in host
- * mode. This parameter is applicable only if
- * host_support_fs_ls_low_power is enabled.
- * 0 - 48 MHz
- * (default when phy_type is UTMI+ or ULPI)
- * 1 - 6 MHz
- * (default when phy_type is Full Speed)
- * @ts_dline: Enable Term Select Dline pulsing
- * 0 - No (default)
- * 1 - Yes
- * @reload_ctl: Allow dynamic reloading of HFIR register during runtime
- * 0 - No (default for core < 2.92a)
- * 1 - Yes (default for core >= 2.92a)
- * @ahbcfg: This field allows the default value of the GAHBCFG
- * register to be overridden
- * -1 - GAHBCFG value will be set to 0x06
- * (INCR4, default)
- * all others - GAHBCFG value will be overridden with
- * this value
- * Not all bits can be controlled like this, the
- * bits defined by GAHBCFG_CTRL_MASK are controlled
- * by the driver and are ignored in this
- * configuration value.
- * @uframe_sched: True to enable the microframe scheduler
- *
- * The following parameters may be specified when starting the module. These
- * parameters define how the DWC_otg controller should be configured. A
- * value of -1 (or any other out of range value) for any parameter means
- * to read the value from hardware (if possible) or use the builtin
- * default described above.
- */
-struct dwc2_core_params {
- /*
- * Don't add any non-int members here, this will break
- * dwc2_set_all_params!
- */
- int otg_cap;
- int otg_ver;
- int dma_enable;
- int dma_desc_enable;
- int speed;
- int enable_dynamic_fifo;
- int en_multiple_tx_fifo;
- int host_rx_fifo_size;
- int host_nperio_tx_fifo_size;
- int host_perio_tx_fifo_size;
- int max_transfer_size;
- int max_packet_count;
- int host_channels;
- int phy_type;
- int phy_utmi_width;
- int phy_ulpi_ddr;
- int phy_ulpi_ext_vbus;
- int i2c_enable;
- int ulpi_fs_ls;
- int host_support_fs_ls_low_power;
- int host_ls_low_power_phy_clk;
- int ts_dline;
- int reload_ctl;
- int ahbcfg;
- int uframe_sched;
-};
-
-/**
- * struct dwc2_hw_params - Autodetected parameters.
- *
- * These parameters are the various parameters read from hardware
- * registers during initialization. They typically contain the best
- * supported or maximum value that can be configured in the
- * corresponding dwc2_core_params value.
- *
- * The values that are not in dwc2_core_params are documented below.
- *
- * @op_mode Mode of Operation
- * 0 - HNP- and SRP-Capable OTG (Host & Device)
- * 1 - SRP-Capable OTG (Host & Device)
- * 2 - Non-HNP and Non-SRP Capable OTG (Host & Device)
- * 3 - SRP-Capable Device
- * 4 - Non-OTG Device
- * 5 - SRP-Capable Host
- * 6 - Non-OTG Host
- * @arch Architecture
- * 0 - Slave only
- * 1 - External DMA
- * 2 - Internal DMA
- * @power_optimized Are power optimizations enabled?
- * @num_dev_ep Number of device endpoints available
- * @num_dev_perio_in_ep Number of device periodic IN endpoints
- * avaialable
- * @dev_token_q_depth Device Mode IN Token Sequence Learning Queue
- * Depth
- * 0 to 30
- * @host_perio_tx_q_depth
- * Host Mode Periodic Request Queue Depth
- * 2, 4 or 8
- * @nperio_tx_q_depth
- * Non-Periodic Request Queue Depth
- * 2, 4 or 8
- * @hs_phy_type High-speed PHY interface type
- * 0 - High-speed interface not supported
- * 1 - UTMI+
- * 2 - ULPI
- * 3 - UTMI+ and ULPI
- * @fs_phy_type Full-speed PHY interface type
- * 0 - Full speed interface not supported
- * 1 - Dedicated full speed interface
- * 2 - FS pins shared with UTMI+ pins
- * 3 - FS pins shared with ULPI pins
- * @total_fifo_size: Total internal RAM for FIFOs (bytes)
- * @utmi_phy_data_width UTMI+ PHY data width
- * 0 - 8 bits
- * 1 - 16 bits
- * 2 - 8 or 16 bits
- * @snpsid: Value from SNPSID register
- */
-struct dwc2_hw_params {
- unsigned op_mode:3;
- unsigned arch:2;
- unsigned dma_desc_enable:1;
- unsigned enable_dynamic_fifo:1;
- unsigned en_multiple_tx_fifo:1;
- unsigned host_rx_fifo_size:16;
- unsigned host_nperio_tx_fifo_size:16;
- unsigned host_perio_tx_fifo_size:16;
- unsigned nperio_tx_q_depth:3;
- unsigned host_perio_tx_q_depth:3;
- unsigned dev_token_q_depth:5;
- unsigned max_transfer_size:26;
- unsigned max_packet_count:11;
- unsigned host_channels:5;
- unsigned hs_phy_type:2;
- unsigned fs_phy_type:2;
- unsigned i2c_enable:1;
- unsigned num_dev_ep:4;
- unsigned num_dev_perio_in_ep:4;
- unsigned total_fifo_size:16;
- unsigned power_optimized:1;
- unsigned utmi_phy_data_width:2;
- u32 snpsid;
-};
-
-/**
- * struct dwc2_hsotg - Holds the state of the driver, including the non-periodic
- * and periodic schedules
- *
- * @dev: The struct device pointer
- * @regs: Pointer to controller regs
- * @core_params: Parameters that define how the core should be configured
- * @hw_params: Parameters that were autodetected from the
- * hardware registers
- * @op_state: The operational State, during transitions (a_host=>
- * a_peripheral and b_device=>b_host) this may not match
- * the core, but allows the software to determine
- * transitions
- * @queuing_high_bandwidth: True if multiple packets of a high-bandwidth
- * transfer are in process of being queued
- * @srp_success: Stores status of SRP request in the case of a FS PHY
- * with an I2C interface
- * @wq_otg: Workqueue object used for handling of some interrupts
- * @wf_otg: Work object for handling Connector ID Status Change
- * interrupt
- * @wkp_timer: Timer object for handling Wakeup Detected interrupt
- * @lx_state: Lx state of connected device
- * @flags: Flags for handling root port state changes
- * @non_periodic_sched_inactive: Inactive QHs in the non-periodic schedule.
- * Transfers associated with these QHs are not currently
- * assigned to a host channel.
- * @non_periodic_sched_active: Active QHs in the non-periodic schedule.
- * Transfers associated with these QHs are currently
- * assigned to a host channel.
- * @non_periodic_qh_ptr: Pointer to next QH to process in the active
- * non-periodic schedule
- * @periodic_sched_inactive: Inactive QHs in the periodic schedule. This is a
- * list of QHs for periodic transfers that are _not_
- * scheduled for the next frame. Each QH in the list has an
- * interval counter that determines when it needs to be
- * scheduled for execution. This scheduling mechanism
- * allows only a simple calculation for periodic bandwidth
- * used (i.e. must assume that all periodic transfers may
- * need to execute in the same frame). However, it greatly
- * simplifies scheduling and should be sufficient for the
- * vast majority of OTG hosts, which need to connect to a
- * small number of peripherals at one time. Items move from
- * this list to periodic_sched_ready when the QH interval
- * counter is 0 at SOF.
- * @periodic_sched_ready: List of periodic QHs that are ready for execution in
- * the next frame, but have not yet been assigned to host
- * channels. Items move from this list to
- * periodic_sched_assigned as host channels become
- * available during the current frame.
- * @periodic_sched_assigned: List of periodic QHs to be executed in the next
- * frame that are assigned to host channels. Items move
- * from this list to periodic_sched_queued as the
- * transactions for the QH are queued to the DWC_otg
- * controller.
- * @periodic_sched_queued: List of periodic QHs that have been queued for
- * execution. Items move from this list to either
- * periodic_sched_inactive or periodic_sched_ready when the
- * channel associated with the transfer is released. If the
- * interval for the QH is 1, the item moves to
- * periodic_sched_ready because it must be rescheduled for
- * the next frame. Otherwise, the item moves to
- * periodic_sched_inactive.
- * @periodic_usecs: Total bandwidth claimed so far for periodic transfers.
- * This value is in microseconds per (micro)frame. The
- * assumption is that all periodic transfers may occur in
- * the same (micro)frame.
- * @frame_usecs: Internal variable used by the microframe scheduler
- * @frame_number: Frame number read from the core at SOF. The value ranges
- * from 0 to HFNUM_MAX_FRNUM.
- * @periodic_qh_count: Count of periodic QHs, if using several eps. Used for
- * SOF enable/disable.
- * @free_hc_list: Free host channels in the controller. This is a list of
- * struct dwc2_host_chan items.
- * @periodic_channels: Number of host channels assigned to periodic transfers.
- * Currently assuming that there is a dedicated host
- * channel for each periodic transaction and at least one
- * host channel is available for non-periodic transactions.
- * @non_periodic_channels: Number of host channels assigned to non-periodic
- * transfers
- * @available_host_channels Number of host channels available for the microframe
- * scheduler to use
- * @hc_ptr_array: Array of pointers to the host channel descriptors.
- * Allows accessing a host channel descriptor given the
- * host channel number. This is useful in interrupt
- * handlers.
- * @status_buf: Buffer used for data received during the status phase of
- * a control transfer.
- * @status_buf_dma: DMA address for status_buf
- * @start_work: Delayed work for handling host A-cable connection
- * @reset_work: Delayed work for handling a port reset
- * @lock: Spinlock that protects all the driver data structures
- * @priv: Stores a pointer to the struct usb_hcd
- * @otg_port: OTG port number
- * @frame_list: Frame list
- * @frame_list_dma: Frame list DMA address
- */
-struct dwc2_hsotg {
- struct device *dev;
- void __iomem *regs;
- /** Params detected from hardware */
- struct dwc2_hw_params hw_params;
- /** Params to actually use */
- struct dwc2_core_params *core_params;
- enum usb_otg_state op_state;
-
- unsigned int queuing_high_bandwidth:1;
- unsigned int srp_success:1;
-
- struct workqueue_struct *wq_otg;
- struct work_struct wf_otg;
- struct timer_list wkp_timer;
- enum dwc2_lx_state lx_state;
-
- union dwc2_hcd_internal_flags {
- u32 d32;
- struct {
- unsigned port_connect_status_change:1;
- unsigned port_connect_status:1;
- unsigned port_reset_change:1;
- unsigned port_enable_change:1;
- unsigned port_suspend_change:1;
- unsigned port_over_current_change:1;
- unsigned port_l1_change:1;
- unsigned reserved:26;
- } b;
- } flags;
-
- struct list_head non_periodic_sched_inactive;
- struct list_head non_periodic_sched_active;
- struct list_head *non_periodic_qh_ptr;
- struct list_head periodic_sched_inactive;
- struct list_head periodic_sched_ready;
- struct list_head periodic_sched_assigned;
- struct list_head periodic_sched_queued;
- u16 periodic_usecs;
- u16 frame_usecs[8];
- u16 frame_number;
- u16 periodic_qh_count;
-
-#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
-#define FRAME_NUM_ARRAY_SIZE 1000
- u16 last_frame_num;
- u16 *frame_num_array;
- u16 *last_frame_num_array;
- int frame_num_idx;
- int dumped_frame_num_array;
-#endif
-
- struct list_head free_hc_list;
- int periodic_channels;
- int non_periodic_channels;
- int available_host_channels;
- struct dwc2_host_chan *hc_ptr_array[MAX_EPS_CHANNELS];
- u8 *status_buf;
- dma_addr_t status_buf_dma;
-#define DWC2_HCD_STATUS_BUF_SIZE 64
-
- struct delayed_work start_work;
- struct delayed_work reset_work;
- spinlock_t lock;
- void *priv;
- u8 otg_port;
- u32 *frame_list;
- dma_addr_t frame_list_dma;
-
- /* DWC OTG HW Release versions */
-#define DWC2_CORE_REV_2_71a 0x4f54271a
-#define DWC2_CORE_REV_2_90a 0x4f54290a
-#define DWC2_CORE_REV_2_92a 0x4f54292a
-#define DWC2_CORE_REV_2_94a 0x4f54294a
-#define DWC2_CORE_REV_3_00a 0x4f54300a
-
-#ifdef DEBUG
- u32 frrem_samples;
- u64 frrem_accum;
-
- u32 hfnum_7_samples_a;
- u64 hfnum_7_frrem_accum_a;
- u32 hfnum_0_samples_a;
- u64 hfnum_0_frrem_accum_a;
- u32 hfnum_other_samples_a;
- u64 hfnum_other_frrem_accum_a;
-
- u32 hfnum_7_samples_b;
- u64 hfnum_7_frrem_accum_b;
- u32 hfnum_0_samples_b;
- u64 hfnum_0_frrem_accum_b;
- u32 hfnum_other_samples_b;
- u64 hfnum_other_frrem_accum_b;
-#endif
-};
-
-/* Reasons for halting a host channel */
-enum dwc2_halt_status {
- DWC2_HC_XFER_NO_HALT_STATUS,
- DWC2_HC_XFER_COMPLETE,
- DWC2_HC_XFER_URB_COMPLETE,
- DWC2_HC_XFER_ACK,
- DWC2_HC_XFER_NAK,
- DWC2_HC_XFER_NYET,
- DWC2_HC_XFER_STALL,
- DWC2_HC_XFER_XACT_ERR,
- DWC2_HC_XFER_FRAME_OVERRUN,
- DWC2_HC_XFER_BABBLE_ERR,
- DWC2_HC_XFER_DATA_TOGGLE_ERR,
- DWC2_HC_XFER_AHB_ERR,
- DWC2_HC_XFER_PERIODIC_INCOMPLETE,
- DWC2_HC_XFER_URB_DEQUEUE,
-};
-
-/*
- * The following functions support initialization of the core driver component
- * and the DWC_otg controller
- */
-extern void dwc2_core_host_init(struct dwc2_hsotg *hsotg);
-
-/*
- * Host core Functions.
- * The following functions support managing the DWC_otg controller in host
- * mode.
- */
-extern void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan);
-extern void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
- enum dwc2_halt_status halt_status);
-extern void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan);
-extern void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan);
-extern void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan);
-extern int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan);
-extern void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan);
-extern void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg);
-extern void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg);
-
-extern u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg);
-extern bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg);
-
-/*
- * Common core Functions.
- * The following functions support managing the DWC_otg controller in either
- * device or host mode.
- */
-extern void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes);
-extern void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num);
-extern void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg);
-
-extern int dwc2_core_init(struct dwc2_hsotg *hsotg, bool select_phy, int irq);
-extern void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd);
-extern void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd);
-
-/* This function should be called on every hardware interrupt. */
-extern irqreturn_t dwc2_handle_common_intr(int irq, void *dev);
-
-/* OTG Core Parameters */
-
-/*
- * Specifies the OTG capabilities. The driver will automatically
- * detect the value for this parameter if none is specified.
- * 0 - HNP and SRP capable (default)
- * 1 - SRP Only capable
- * 2 - No HNP/SRP capable
- */
-extern void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_CAP_PARAM_HNP_SRP_CAPABLE 0
-#define DWC2_CAP_PARAM_SRP_ONLY_CAPABLE 1
-#define DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE 2
-
-/*
- * Specifies whether to use slave or DMA mode for accessing the data
- * FIFOs. The driver will automatically detect the value for this
- * parameter if none is specified.
- * 0 - Slave
- * 1 - DMA (default, if available)
- */
-extern void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * When DMA mode is enabled specifies whether to use
- * address DMA or DMA Descritor mode for accessing the data
- * FIFOs in device mode. The driver will automatically detect
- * the value for this parameter if none is specified.
- * 0 - address DMA
- * 1 - DMA Descriptor(default, if available)
- */
-extern void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies the maximum speed of operation in host and device mode.
- * The actual speed depends on the speed of the attached device and
- * the value of phy_type. The actual speed depends on the speed of the
- * attached device.
- * 0 - High Speed (default)
- * 1 - Full Speed
- */
-extern void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_SPEED_PARAM_HIGH 0
-#define DWC2_SPEED_PARAM_FULL 1
-
-/*
- * Specifies whether low power mode is supported when attached
- * to a Full Speed or Low Speed device in host mode.
- *
- * 0 - Don't support low power mode (default)
- * 1 - Support low power mode
- */
-extern void dwc2_set_param_host_support_fs_ls_low_power(
- struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies the PHY clock rate in low power mode when connected to a
- * Low Speed device in host mode. This parameter is applicable only if
- * HOST_SUPPORT_FS_LS_LOW_POWER is enabled. If PHY_TYPE is set to FS
- * then defaults to 6 MHZ otherwise 48 MHZ.
- *
- * 0 - 48 MHz
- * 1 - 6 MHz
- */
-extern void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg,
- int val);
-#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ 0
-#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ 1
-
-/*
- * 0 - Use cC FIFO size parameters
- * 1 - Allow dynamic FIFO sizing (default)
- */
-extern void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg,
- int val);
-
-/*
- * Number of 4-byte words in the Rx FIFO in host mode when dynamic
- * FIFO sizing is enabled.
- * 16 to 32768 (default 1024)
- */
-extern void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Number of 4-byte words in the non-periodic Tx FIFO in host mode
- * when Dynamic FIFO sizing is enabled in the core.
- * 16 to 32768 (default 256)
- */
-extern void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg,
- int val);
-
-/*
- * Number of 4-byte words in the host periodic Tx FIFO when dynamic
- * FIFO sizing is enabled.
- * 16 to 32768 (default 256)
- */
-extern void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg,
- int val);
-
-/*
- * The maximum transfer size supported in bytes.
- * 2047 to 65,535 (default 65,535)
- */
-extern void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * The maximum number of packets in a transfer.
- * 15 to 511 (default 511)
- */
-extern void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * The number of host channel registers to use.
- * 1 to 16 (default 11)
- * Note: The FPGA configuration supports a maximum of 11 host channels.
- */
-extern void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies the type of PHY interface to use. By default, the driver
- * will automatically detect the phy_type.
- *
- * 0 - Full Speed PHY
- * 1 - UTMI+ (default)
- * 2 - ULPI
- */
-extern void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_PHY_TYPE_PARAM_FS 0
-#define DWC2_PHY_TYPE_PARAM_UTMI 1
-#define DWC2_PHY_TYPE_PARAM_ULPI 2
-
-/*
- * Specifies the UTMI+ Data Width. This parameter is
- * applicable for a PHY_TYPE of UTMI+ or ULPI. (For a ULPI
- * PHY_TYPE, this parameter indicates the data width between
- * the MAC and the ULPI Wrapper.) Also, this parameter is
- * applicable only if the OTG_HSPHY_WIDTH cC parameter was set
- * to "8 and 16 bits", meaning that the core has been
- * configured to work at either data path width.
- *
- * 8 or 16 bits (default 16)
- */
-extern void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies whether the ULPI operates at double or single
- * data rate. This parameter is only applicable if PHY_TYPE is
- * ULPI.
- *
- * 0 - single data rate ULPI interface with 8 bit wide data
- * bus (default)
- * 1 - double data rate ULPI interface with 4 bit wide data
- * bus
- */
-extern void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies whether to use the internal or external supply to
- * drive the vbus with a ULPI phy.
- */
-extern void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val);
-#define DWC2_PHY_ULPI_INTERNAL_VBUS 0
-#define DWC2_PHY_ULPI_EXTERNAL_VBUS 1
-
-/*
- * Specifies whether to use the I2Cinterface for full speed PHY. This
- * parameter is only applicable if PHY_TYPE is FS.
- * 0 - No (default)
- * 1 - Yes
- */
-extern void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Specifies whether dedicated transmit FIFOs are
- * enabled for non periodic IN endpoints in device mode
- * 0 - No
- * 1 - Yes
- */
-extern void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg,
- int val);
-
-extern void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val);
-
-extern void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val);
-
-/*
- * Dump core registers and SPRAM
- */
-extern void dwc2_dump_dev_registers(struct dwc2_hsotg *hsotg);
-extern void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg);
-extern void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg);
-
-/*
- * Return OTG version - either 1.3 or 2.0
- */
-extern u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg);
-
-#endif /* __DWC2_CORE_H__ */
+++ /dev/null
-/*
- * core_intr.c - DesignWare HS OTG Controller common interrupt handling
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * This file contains the common interrupt handlers
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-
-#include <linux/usb/hcd.h>
-#include <linux/usb/ch11.h>
-
-#include "core.h"
-#include "hcd.h"
-
-static const char *dwc2_op_state_str(struct dwc2_hsotg *hsotg)
-{
- switch (hsotg->op_state) {
- case OTG_STATE_A_HOST:
- return "a_host";
- case OTG_STATE_A_SUSPEND:
- return "a_suspend";
- case OTG_STATE_A_PERIPHERAL:
- return "a_peripheral";
- case OTG_STATE_B_PERIPHERAL:
- return "b_peripheral";
- case OTG_STATE_B_HOST:
- return "b_host";
- default:
- return "unknown";
- }
-}
-
-/**
- * dwc2_handle_mode_mismatch_intr() - Logs a mode mismatch warning message
- *
- * @hsotg: Programming view of DWC_otg controller
- */
-static void dwc2_handle_mode_mismatch_intr(struct dwc2_hsotg *hsotg)
-{
- dev_warn(hsotg->dev, "Mode Mismatch Interrupt: currently in %s mode\n",
- dwc2_is_host_mode(hsotg) ? "Host" : "Device");
-
- /* Clear interrupt */
- writel(GINTSTS_MODEMIS, hsotg->regs + GINTSTS);
-}
-
-/**
- * dwc2_handle_otg_intr() - Handles the OTG Interrupts. It reads the OTG
- * Interrupt Register (GOTGINT) to determine what interrupt has occurred.
- *
- * @hsotg: Programming view of DWC_otg controller
- */
-static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
-{
- u32 gotgint;
- u32 gotgctl;
- u32 gintmsk;
-
- gotgint = readl(hsotg->regs + GOTGINT);
- gotgctl = readl(hsotg->regs + GOTGCTL);
- dev_dbg(hsotg->dev, "++OTG Interrupt gotgint=%0x [%s]\n", gotgint,
- dwc2_op_state_str(hsotg));
-
- if (gotgint & GOTGINT_SES_END_DET) {
- dev_dbg(hsotg->dev,
- " ++OTG Interrupt: Session End Detected++ (%s)\n",
- dwc2_op_state_str(hsotg));
- gotgctl = readl(hsotg->regs + GOTGCTL);
-
- if (hsotg->op_state == OTG_STATE_B_HOST) {
- hsotg->op_state = OTG_STATE_B_PERIPHERAL;
- } else {
- /*
- * If not B_HOST and Device HNP still set, HNP did
- * not succeed!
- */
- if (gotgctl & GOTGCTL_DEVHNPEN) {
- dev_dbg(hsotg->dev, "Session End Detected\n");
- dev_err(hsotg->dev,
- "Device Not Connected/Responding!\n");
- }
-
- /*
- * If Session End Detected the B-Cable has been
- * disconnected
- */
- /* Reset to a clean state */
- hsotg->lx_state = DWC2_L0;
- }
-
- gotgctl = readl(hsotg->regs + GOTGCTL);
- gotgctl &= ~GOTGCTL_DEVHNPEN;
- writel(gotgctl, hsotg->regs + GOTGCTL);
- }
-
- if (gotgint & GOTGINT_SES_REQ_SUC_STS_CHNG) {
- dev_dbg(hsotg->dev,
- " ++OTG Interrupt: Session Request Success Status Change++\n");
- gotgctl = readl(hsotg->regs + GOTGCTL);
- if (gotgctl & GOTGCTL_SESREQSCS) {
- if (hsotg->core_params->phy_type ==
- DWC2_PHY_TYPE_PARAM_FS
- && hsotg->core_params->i2c_enable > 0) {
- hsotg->srp_success = 1;
- } else {
- /* Clear Session Request */
- gotgctl = readl(hsotg->regs + GOTGCTL);
- gotgctl &= ~GOTGCTL_SESREQ;
- writel(gotgctl, hsotg->regs + GOTGCTL);
- }
- }
- }
-
- if (gotgint & GOTGINT_HST_NEG_SUC_STS_CHNG) {
- /*
- * Print statements during the HNP interrupt handling
- * can cause it to fail
- */
- gotgctl = readl(hsotg->regs + GOTGCTL);
- /*
- * WA for 3.00a- HW is not setting cur_mode, even sometimes
- * this does not help
- */
- if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a)
- udelay(100);
- if (gotgctl & GOTGCTL_HSTNEGSCS) {
- if (dwc2_is_host_mode(hsotg)) {
- hsotg->op_state = OTG_STATE_B_HOST;
- /*
- * Need to disable SOF interrupt immediately.
- * When switching from device to host, the PCD
- * interrupt handler won't handle the interrupt
- * if host mode is already set. The HCD
- * interrupt handler won't get called if the
- * HCD state is HALT. This means that the
- * interrupt does not get handled and Linux
- * complains loudly.
- */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk &= ~GINTSTS_SOF;
- writel(gintmsk, hsotg->regs + GINTMSK);
-
- /*
- * Call callback function with spin lock
- * released
- */
- spin_unlock(&hsotg->lock);
-
- /* Initialize the Core for Host mode */
- dwc2_hcd_start(hsotg);
- spin_lock(&hsotg->lock);
- hsotg->op_state = OTG_STATE_B_HOST;
- }
- } else {
- gotgctl = readl(hsotg->regs + GOTGCTL);
- gotgctl &= ~(GOTGCTL_HNPREQ | GOTGCTL_DEVHNPEN);
- writel(gotgctl, hsotg->regs + GOTGCTL);
- dev_dbg(hsotg->dev, "HNP Failed\n");
- dev_err(hsotg->dev,
- "Device Not Connected/Responding\n");
- }
- }
-
- if (gotgint & GOTGINT_HST_NEG_DET) {
- /*
- * The disconnect interrupt is set at the same time as
- * Host Negotiation Detected. During the mode switch all
- * interrupts are cleared so the disconnect interrupt
- * handler will not get executed.
- */
- dev_dbg(hsotg->dev,
- " ++OTG Interrupt: Host Negotiation Detected++ (%s)\n",
- (dwc2_is_host_mode(hsotg) ? "Host" : "Device"));
- if (dwc2_is_device_mode(hsotg)) {
- dev_dbg(hsotg->dev, "a_suspend->a_peripheral (%d)\n",
- hsotg->op_state);
- spin_unlock(&hsotg->lock);
- dwc2_hcd_disconnect(hsotg);
- spin_lock(&hsotg->lock);
- hsotg->op_state = OTG_STATE_A_PERIPHERAL;
- } else {
- /* Need to disable SOF interrupt immediately */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk &= ~GINTSTS_SOF;
- writel(gintmsk, hsotg->regs + GINTMSK);
- spin_unlock(&hsotg->lock);
- dwc2_hcd_start(hsotg);
- spin_lock(&hsotg->lock);
- hsotg->op_state = OTG_STATE_A_HOST;
- }
- }
-
- if (gotgint & GOTGINT_A_DEV_TOUT_CHG)
- dev_dbg(hsotg->dev,
- " ++OTG Interrupt: A-Device Timeout Change++\n");
- if (gotgint & GOTGINT_DBNCE_DONE)
- dev_dbg(hsotg->dev, " ++OTG Interrupt: Debounce Done++\n");
-
- /* Clear GOTGINT */
- writel(gotgint, hsotg->regs + GOTGINT);
-}
-
-/**
- * dwc2_handle_conn_id_status_change_intr() - Handles the Connector ID Status
- * Change Interrupt
- *
- * @hsotg: Programming view of DWC_otg controller
- *
- * Reads the OTG Interrupt Register (GOTCTL) to determine whether this is a
- * Device to Host Mode transition or a Host to Device Mode transition. This only
- * occurs when the cable is connected/removed from the PHY connector.
- */
-static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
-{
- u32 gintmsk = readl(hsotg->regs + GINTMSK);
-
- /* Need to disable SOF interrupt immediately */
- gintmsk &= ~GINTSTS_SOF;
- writel(gintmsk, hsotg->regs + GINTMSK);
-
- dev_dbg(hsotg->dev, " ++Connector ID Status Change Interrupt++ (%s)\n",
- dwc2_is_host_mode(hsotg) ? "Host" : "Device");
-
- /*
- * Need to schedule a work, as there are possible DELAY function calls.
- * Release lock before scheduling workq as it holds spinlock during
- * scheduling.
- */
- spin_unlock(&hsotg->lock);
- queue_work(hsotg->wq_otg, &hsotg->wf_otg);
- spin_lock(&hsotg->lock);
-
- /* Clear interrupt */
- writel(GINTSTS_CONIDSTSCHNG, hsotg->regs + GINTSTS);
-}
-
-/**
- * dwc2_handle_session_req_intr() - This interrupt indicates that a device is
- * initiating the Session Request Protocol to request the host to turn on bus
- * power so a new session can begin
- *
- * @hsotg: Programming view of DWC_otg controller
- *
- * This handler responds by turning on bus power. If the DWC_otg controller is
- * in low power mode, this handler brings the controller out of low power mode
- * before turning on bus power.
- */
-static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
-{
- dev_dbg(hsotg->dev, "++Session Request Interrupt++\n");
-
- /* Clear interrupt */
- writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS);
-}
-
-/*
- * This interrupt indicates that the DWC_otg controller has detected a
- * resume or remote wakeup sequence. If the DWC_otg controller is in
- * low power mode, the handler must brings the controller out of low
- * power mode. The controller automatically begins resume signaling.
- * The handler schedules a time to stop resume signaling.
- */
-static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
-{
- dev_dbg(hsotg->dev, "++Resume or Remote Wakeup Detected Interrupt++\n");
- dev_dbg(hsotg->dev, "%s lxstate = %d\n", __func__, hsotg->lx_state);
-
- if (dwc2_is_device_mode(hsotg)) {
- dev_dbg(hsotg->dev, "DSTS=0x%0x\n", readl(hsotg->regs + DSTS));
- if (hsotg->lx_state == DWC2_L2) {
- u32 dctl = readl(hsotg->regs + DCTL);
-
- /* Clear Remote Wakeup Signaling */
- dctl &= ~DCTL_RMTWKUPSIG;
- writel(dctl, hsotg->regs + DCTL);
- }
- /* Change to L0 state */
- hsotg->lx_state = DWC2_L0;
- } else {
- if (hsotg->lx_state != DWC2_L1) {
- u32 pcgcctl = readl(hsotg->regs + PCGCTL);
-
- /* Restart the Phy Clock */
- pcgcctl &= ~PCGCTL_STOPPCLK;
- writel(pcgcctl, hsotg->regs + PCGCTL);
- mod_timer(&hsotg->wkp_timer,
- jiffies + msecs_to_jiffies(71));
- } else {
- /* Change to L0 state */
- hsotg->lx_state = DWC2_L0;
- }
- }
-
- /* Clear interrupt */
- writel(GINTSTS_WKUPINT, hsotg->regs + GINTSTS);
-}
-
-/*
- * This interrupt indicates that a device has been disconnected from the
- * root port
- */
-static void dwc2_handle_disconnect_intr(struct dwc2_hsotg *hsotg)
-{
- dev_dbg(hsotg->dev, "++Disconnect Detected Interrupt++ (%s) %s\n",
- dwc2_is_host_mode(hsotg) ? "Host" : "Device",
- dwc2_op_state_str(hsotg));
-
- /* Change to L3 (OFF) state */
- hsotg->lx_state = DWC2_L3;
-
- writel(GINTSTS_DISCONNINT, hsotg->regs + GINTSTS);
-}
-
-/*
- * This interrupt indicates that SUSPEND state has been detected on the USB.
- *
- * For HNP the USB Suspend interrupt signals the change from "a_peripheral"
- * to "a_host".
- *
- * When power management is enabled the core will be put in low power mode.
- */
-static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
-{
- u32 dsts;
-
- dev_dbg(hsotg->dev, "USB SUSPEND\n");
-
- if (dwc2_is_device_mode(hsotg)) {
- /*
- * Check the Device status register to determine if the Suspend
- * state is active
- */
- dsts = readl(hsotg->regs + DSTS);
- dev_dbg(hsotg->dev, "DSTS=0x%0x\n", dsts);
- dev_dbg(hsotg->dev,
- "DSTS.Suspend Status=%d HWCFG4.Power Optimize=%d\n",
- !!(dsts & DSTS_SUSPSTS),
- hsotg->hw_params.power_optimized);
- } else {
- if (hsotg->op_state == OTG_STATE_A_PERIPHERAL) {
- dev_dbg(hsotg->dev, "a_peripheral->a_host\n");
-
- /* Clear the a_peripheral flag, back to a_host */
- spin_unlock(&hsotg->lock);
- dwc2_hcd_start(hsotg);
- spin_lock(&hsotg->lock);
- hsotg->op_state = OTG_STATE_A_HOST;
- }
- }
-
- /* Change to L2 (suspend) state */
- hsotg->lx_state = DWC2_L2;
-
- /* Clear interrupt */
- writel(GINTSTS_USBSUSP, hsotg->regs + GINTSTS);
-}
-
-#define GINTMSK_COMMON (GINTSTS_WKUPINT | GINTSTS_SESSREQINT | \
- GINTSTS_CONIDSTSCHNG | GINTSTS_OTGINT | \
- GINTSTS_MODEMIS | GINTSTS_DISCONNINT | \
- GINTSTS_USBSUSP | GINTSTS_PRTINT)
-
-/*
- * This function returns the Core Interrupt register
- */
-static u32 dwc2_read_common_intr(struct dwc2_hsotg *hsotg)
-{
- u32 gintsts;
- u32 gintmsk;
- u32 gahbcfg;
- u32 gintmsk_common = GINTMSK_COMMON;
-
- gintsts = readl(hsotg->regs + GINTSTS);
- gintmsk = readl(hsotg->regs + GINTMSK);
- gahbcfg = readl(hsotg->regs + GAHBCFG);
-
- /* If any common interrupts set */
- if (gintsts & gintmsk_common)
- dev_dbg(hsotg->dev, "gintsts=%08x gintmsk=%08x\n",
- gintsts, gintmsk);
-
- if (gahbcfg & GAHBCFG_GLBL_INTR_EN)
- return gintsts & gintmsk & gintmsk_common;
- else
- return 0;
-}
-
-/*
- * Common interrupt handler
- *
- * The common interrupts are those that occur in both Host and Device mode.
- * This handler handles the following interrupts:
- * - Mode Mismatch Interrupt
- * - OTG Interrupt
- * - Connector ID Status Change Interrupt
- * - Disconnect Interrupt
- * - Session Request Interrupt
- * - Resume / Remote Wakeup Detected Interrupt
- * - Suspend Interrupt
- */
-irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
-{
- struct dwc2_hsotg *hsotg = dev;
- u32 gintsts;
- irqreturn_t retval = IRQ_NONE;
-
- if (!dwc2_is_controller_alive(hsotg)) {
- dev_warn(hsotg->dev, "Controller is dead\n");
- goto out;
- }
-
- spin_lock(&hsotg->lock);
-
- gintsts = dwc2_read_common_intr(hsotg);
- if (gintsts & ~GINTSTS_PRTINT)
- retval = IRQ_HANDLED;
-
- if (gintsts & GINTSTS_MODEMIS)
- dwc2_handle_mode_mismatch_intr(hsotg);
- if (gintsts & GINTSTS_OTGINT)
- dwc2_handle_otg_intr(hsotg);
- if (gintsts & GINTSTS_CONIDSTSCHNG)
- dwc2_handle_conn_id_status_change_intr(hsotg);
- if (gintsts & GINTSTS_DISCONNINT)
- dwc2_handle_disconnect_intr(hsotg);
- if (gintsts & GINTSTS_SESSREQINT)
- dwc2_handle_session_req_intr(hsotg);
- if (gintsts & GINTSTS_WKUPINT)
- dwc2_handle_wakeup_detected_intr(hsotg);
- if (gintsts & GINTSTS_USBSUSP)
- dwc2_handle_usb_suspend_intr(hsotg);
-
- if (gintsts & GINTSTS_PRTINT) {
- /*
- * The port interrupt occurs while in device mode with HPRT0
- * Port Enable/Disable
- */
- if (dwc2_is_device_mode(hsotg)) {
- dev_dbg(hsotg->dev,
- " --Port interrupt received in Device mode--\n");
- gintsts = GINTSTS_PRTINT;
- writel(gintsts, hsotg->regs + GINTSTS);
- retval = 1;
- }
- }
-
- spin_unlock(&hsotg->lock);
-out:
- return retval;
-}
-EXPORT_SYMBOL_GPL(dwc2_handle_common_intr);
+++ /dev/null
-/*
- * hcd.c - DesignWare HS OTG Controller host-mode routines
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * This file contains the core HCD code, and implements the Linux hc_driver
- * API
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-
-#include <linux/usb/hcd.h>
-#include <linux/usb/ch11.h>
-
-#include "core.h"
-#include "hcd.h"
-
-/**
- * dwc2_dump_channel_info() - Prints the state of a host channel
- *
- * @hsotg: Programming view of DWC_otg controller
- * @chan: Pointer to the channel to dump
- *
- * Must be called with interrupt disabled and spinlock held
- *
- * NOTE: This function will be removed once the peripheral controller code
- * is integrated and the driver is stable
- */
-static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan)
-{
-#ifdef VERBOSE_DEBUG
- int num_channels = hsotg->core_params->host_channels;
- struct dwc2_qh *qh;
- u32 hcchar;
- u32 hcsplt;
- u32 hctsiz;
- u32 hc_dma;
- int i;
-
- if (chan == NULL)
- return;
-
- hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
- hcsplt = readl(hsotg->regs + HCSPLT(chan->hc_num));
- hctsiz = readl(hsotg->regs + HCTSIZ(chan->hc_num));
- hc_dma = readl(hsotg->regs + HCDMA(chan->hc_num));
-
- dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan);
- dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n",
- hcchar, hcsplt);
- dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n",
- hctsiz, hc_dma);
- dev_dbg(hsotg->dev, " dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
- chan->dev_addr, chan->ep_num, chan->ep_is_in);
- dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type);
- dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
- dev_dbg(hsotg->dev, " data_pid_start: %d\n", chan->data_pid_start);
- dev_dbg(hsotg->dev, " xfer_started: %d\n", chan->xfer_started);
- dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status);
- dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf);
- dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
- (unsigned long)chan->xfer_dma);
- dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len);
- dev_dbg(hsotg->dev, " qh: %p\n", chan->qh);
- dev_dbg(hsotg->dev, " NP inactive sched:\n");
- list_for_each_entry(qh, &hsotg->non_periodic_sched_inactive,
- qh_list_entry)
- dev_dbg(hsotg->dev, " %p\n", qh);
- dev_dbg(hsotg->dev, " NP active sched:\n");
- list_for_each_entry(qh, &hsotg->non_periodic_sched_active,
- qh_list_entry)
- dev_dbg(hsotg->dev, " %p\n", qh);
- dev_dbg(hsotg->dev, " Channels:\n");
- for (i = 0; i < num_channels; i++) {
- struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
-
- dev_dbg(hsotg->dev, " %2d: %p\n", i, chan);
- }
-#endif /* VERBOSE_DEBUG */
-}
-
-/*
- * Processes all the URBs in a single list of QHs. Completes them with
- * -ETIMEDOUT and frees the QTD.
- *
- * Must be called with interrupt disabled and spinlock held
- */
-static void dwc2_kill_urbs_in_qh_list(struct dwc2_hsotg *hsotg,
- struct list_head *qh_list)
-{
- struct dwc2_qh *qh, *qh_tmp;
- struct dwc2_qtd *qtd, *qtd_tmp;
-
- list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) {
- list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list,
- qtd_list_entry) {
- dwc2_host_complete(hsotg, qtd, -ETIMEDOUT);
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
- }
- }
-}
-
-static void dwc2_qh_list_free(struct dwc2_hsotg *hsotg,
- struct list_head *qh_list)
-{
- struct dwc2_qtd *qtd, *qtd_tmp;
- struct dwc2_qh *qh, *qh_tmp;
- unsigned long flags;
-
- if (!qh_list->next)
- /* The list hasn't been initialized yet */
- return;
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- /* Ensure there are no QTDs or URBs left */
- dwc2_kill_urbs_in_qh_list(hsotg, qh_list);
-
- list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) {
- dwc2_hcd_qh_unlink(hsotg, qh);
-
- /* Free each QTD in the QH's QTD list */
- list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list,
- qtd_list_entry)
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
- dwc2_hcd_qh_free(hsotg, qh);
- spin_lock_irqsave(&hsotg->lock, flags);
- }
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
-}
-
-/*
- * Responds with an error status of -ETIMEDOUT to all URBs in the non-periodic
- * and periodic schedules. The QTD associated with each URB is removed from
- * the schedule and freed. This function may be called when a disconnect is
- * detected or when the HCD is being stopped.
- *
- * Must be called with interrupt disabled and spinlock held
- */
-static void dwc2_kill_all_urbs(struct dwc2_hsotg *hsotg)
-{
- dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_inactive);
- dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_active);
- dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_inactive);
- dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_ready);
- dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_assigned);
- dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_queued);
-}
-
-/**
- * dwc2_hcd_start() - Starts the HCD when switching to Host mode
- *
- * @hsotg: Pointer to struct dwc2_hsotg
- */
-void dwc2_hcd_start(struct dwc2_hsotg *hsotg)
-{
- u32 hprt0;
-
- if (hsotg->op_state == OTG_STATE_B_HOST) {
- /*
- * Reset the port. During a HNP mode switch the reset
- * needs to occur within 1ms and have a duration of at
- * least 50ms.
- */
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 |= HPRT0_RST;
- writel(hprt0, hsotg->regs + HPRT0);
- }
-
- queue_delayed_work(hsotg->wq_otg, &hsotg->start_work,
- msecs_to_jiffies(50));
-}
-
-/* Must be called with interrupt disabled and spinlock held */
-static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg)
-{
- int num_channels = hsotg->core_params->host_channels;
- struct dwc2_host_chan *channel;
- u32 hcchar;
- int i;
-
- if (hsotg->core_params->dma_enable <= 0) {
- /* Flush out any channel requests in slave mode */
- for (i = 0; i < num_channels; i++) {
- channel = hsotg->hc_ptr_array[i];
- if (!list_empty(&channel->hc_list_entry))
- continue;
- hcchar = readl(hsotg->regs + HCCHAR(i));
- if (hcchar & HCCHAR_CHENA) {
- hcchar &= ~(HCCHAR_CHENA | HCCHAR_EPDIR);
- hcchar |= HCCHAR_CHDIS;
- writel(hcchar, hsotg->regs + HCCHAR(i));
- }
- }
- }
-
- for (i = 0; i < num_channels; i++) {
- channel = hsotg->hc_ptr_array[i];
- if (!list_empty(&channel->hc_list_entry))
- continue;
- hcchar = readl(hsotg->regs + HCCHAR(i));
- if (hcchar & HCCHAR_CHENA) {
- /* Halt the channel */
- hcchar |= HCCHAR_CHDIS;
- writel(hcchar, hsotg->regs + HCCHAR(i));
- }
-
- dwc2_hc_cleanup(hsotg, channel);
- list_add_tail(&channel->hc_list_entry, &hsotg->free_hc_list);
- /*
- * Added for Descriptor DMA to prevent channel double cleanup in
- * release_channel_ddma(), which is called from ep_disable when
- * device disconnects
- */
- channel->qh = NULL;
- }
-}
-
-/**
- * dwc2_hcd_disconnect() - Handles disconnect of the HCD
- *
- * @hsotg: Pointer to struct dwc2_hsotg
- *
- * Must be called with interrupt disabled and spinlock held
- */
-void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg)
-{
- u32 intr;
-
- /* Set status flags for the hub driver */
- hsotg->flags.b.port_connect_status_change = 1;
- hsotg->flags.b.port_connect_status = 0;
-
- /*
- * Shutdown any transfers in process by clearing the Tx FIFO Empty
- * interrupt mask and status bits and disabling subsequent host
- * channel interrupts.
- */
- intr = readl(hsotg->regs + GINTMSK);
- intr &= ~(GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT);
- writel(intr, hsotg->regs + GINTMSK);
- intr = GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT;
- writel(intr, hsotg->regs + GINTSTS);
-
- /*
- * Turn off the vbus power only if the core has transitioned to device
- * mode. If still in host mode, need to keep power on to detect a
- * reconnection.
- */
- if (dwc2_is_device_mode(hsotg)) {
- if (hsotg->op_state != OTG_STATE_A_SUSPEND) {
- dev_dbg(hsotg->dev, "Disconnect: PortPower off\n");
- writel(0, hsotg->regs + HPRT0);
- }
-
- dwc2_disable_host_interrupts(hsotg);
- }
-
- /* Respond with an error status to all URBs in the schedule */
- dwc2_kill_all_urbs(hsotg);
-
- if (dwc2_is_host_mode(hsotg))
- /* Clean up any host channels that were in use */
- dwc2_hcd_cleanup_channels(hsotg);
-
- dwc2_host_disconnect(hsotg);
-}
-
-/**
- * dwc2_hcd_rem_wakeup() - Handles Remote Wakeup
- *
- * @hsotg: Pointer to struct dwc2_hsotg
- */
-static void dwc2_hcd_rem_wakeup(struct dwc2_hsotg *hsotg)
-{
- if (hsotg->lx_state == DWC2_L2)
- hsotg->flags.b.port_suspend_change = 1;
- else
- hsotg->flags.b.port_l1_change = 1;
-}
-
-/**
- * dwc2_hcd_stop() - Halts the DWC_otg host mode operations in a clean manner
- *
- * @hsotg: Pointer to struct dwc2_hsotg
- *
- * Must be called with interrupt disabled and spinlock held
- */
-void dwc2_hcd_stop(struct dwc2_hsotg *hsotg)
-{
- dev_dbg(hsotg->dev, "DWC OTG HCD STOP\n");
-
- /*
- * The root hub should be disconnected before this function is called.
- * The disconnect will clear the QTD lists (via ..._hcd_urb_dequeue)
- * and the QH lists (via ..._hcd_endpoint_disable).
- */
-
- /* Turn off all host-specific interrupts */
- dwc2_disable_host_interrupts(hsotg);
-
- /* Turn off the vbus power */
- dev_dbg(hsotg->dev, "PortPower off\n");
- writel(0, hsotg->regs + HPRT0);
-}
-
-static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
- struct dwc2_hcd_urb *urb, void **ep_handle,
- gfp_t mem_flags)
-{
- struct dwc2_qtd *qtd;
- unsigned long flags;
- u32 intr_mask;
- int retval;
- int dev_speed;
-
- if (!hsotg->flags.b.port_connect_status) {
- /* No longer connected */
- dev_err(hsotg->dev, "Not connected\n");
- return -ENODEV;
- }
-
- dev_speed = dwc2_host_get_speed(hsotg, urb->priv);
-
- /* Some configurations cannot support LS traffic on a FS root port */
- if ((dev_speed == USB_SPEED_LOW) &&
- (hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED) &&
- (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI)) {
- u32 hprt0 = readl(hsotg->regs + HPRT0);
- u32 prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
-
- if (prtspd == HPRT0_SPD_FULL_SPEED)
- return -ENODEV;
- }
-
- qtd = kzalloc(sizeof(*qtd), mem_flags);
- if (!qtd)
- return -ENOMEM;
-
- dwc2_hcd_qtd_init(qtd, urb);
- retval = dwc2_hcd_qtd_add(hsotg, qtd, (struct dwc2_qh **)ep_handle,
- mem_flags);
- if (retval) {
- dev_err(hsotg->dev,
- "DWC OTG HCD URB Enqueue failed adding QTD. Error status %d\n",
- retval);
- kfree(qtd);
- return retval;
- }
-
- intr_mask = readl(hsotg->regs + GINTMSK);
- if (!(intr_mask & GINTSTS_SOF)) {
- enum dwc2_transaction_type tr_type;
-
- if (qtd->qh->ep_type == USB_ENDPOINT_XFER_BULK &&
- !(qtd->urb->flags & URB_GIVEBACK_ASAP))
- /*
- * Do not schedule SG transactions until qtd has
- * URB_GIVEBACK_ASAP set
- */
- return 0;
-
- spin_lock_irqsave(&hsotg->lock, flags);
- tr_type = dwc2_hcd_select_transactions(hsotg);
- if (tr_type != DWC2_TRANSACTION_NONE)
- dwc2_hcd_queue_transactions(hsotg, tr_type);
- spin_unlock_irqrestore(&hsotg->lock, flags);
- }
-
- return 0;
-}
-
-/* Must be called with interrupt disabled and spinlock held */
-static int dwc2_hcd_urb_dequeue(struct dwc2_hsotg *hsotg,
- struct dwc2_hcd_urb *urb)
-{
- struct dwc2_qh *qh;
- struct dwc2_qtd *urb_qtd;
-
- urb_qtd = urb->qtd;
- if (!urb_qtd) {
- dev_dbg(hsotg->dev, "## Urb QTD is NULL ##\n");
- return -EINVAL;
- }
-
- qh = urb_qtd->qh;
- if (!qh) {
- dev_dbg(hsotg->dev, "## Urb QTD QH is NULL ##\n");
- return -EINVAL;
- }
-
- urb->priv = NULL;
-
- if (urb_qtd->in_process && qh->channel) {
- dwc2_dump_channel_info(hsotg, qh->channel);
-
- /* The QTD is in process (it has been assigned to a channel) */
- if (hsotg->flags.b.port_connect_status)
- /*
- * If still connected (i.e. in host mode), halt the
- * channel so it can be used for other transfers. If
- * no longer connected, the host registers can't be
- * written to halt the channel since the core is in
- * device mode.
- */
- dwc2_hc_halt(hsotg, qh->channel,
- DWC2_HC_XFER_URB_DEQUEUE);
- }
-
- /*
- * Free the QTD and clean up the associated QH. Leave the QH in the
- * schedule if it has any remaining QTDs.
- */
- if (hsotg->core_params->dma_desc_enable <= 0) {
- u8 in_process = urb_qtd->in_process;
-
- dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh);
- if (in_process) {
- dwc2_hcd_qh_deactivate(hsotg, qh, 0);
- qh->channel = NULL;
- } else if (list_empty(&qh->qtd_list)) {
- dwc2_hcd_qh_unlink(hsotg, qh);
- }
- } else {
- dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh);
- }
-
- return 0;
-}
-
-/* Must NOT be called with interrupt disabled or spinlock held */
-static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg,
- struct usb_host_endpoint *ep, int retry)
-{
- struct dwc2_qtd *qtd, *qtd_tmp;
- struct dwc2_qh *qh;
- unsigned long flags;
- int rc;
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- qh = ep->hcpriv;
- if (!qh) {
- rc = -EINVAL;
- goto err;
- }
-
- while (!list_empty(&qh->qtd_list) && retry--) {
- if (retry == 0) {
- dev_err(hsotg->dev,
- "## timeout in dwc2_hcd_endpoint_disable() ##\n");
- rc = -EBUSY;
- goto err;
- }
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
- usleep_range(20000, 40000);
- spin_lock_irqsave(&hsotg->lock, flags);
- qh = ep->hcpriv;
- if (!qh) {
- rc = -EINVAL;
- goto err;
- }
- }
-
- dwc2_hcd_qh_unlink(hsotg, qh);
-
- /* Free each QTD in the QH's QTD list */
- list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry)
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
-
- ep->hcpriv = NULL;
- spin_unlock_irqrestore(&hsotg->lock, flags);
- dwc2_hcd_qh_free(hsotg, qh);
-
- return 0;
-
-err:
- ep->hcpriv = NULL;
- spin_unlock_irqrestore(&hsotg->lock, flags);
-
- return rc;
-}
-
-/* Must be called with interrupt disabled and spinlock held */
-static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg,
- struct usb_host_endpoint *ep)
-{
- struct dwc2_qh *qh = ep->hcpriv;
-
- if (!qh)
- return -EINVAL;
-
- qh->data_toggle = DWC2_HC_PID_DATA0;
-
- return 0;
-}
-
-/*
- * Initializes dynamic portions of the DWC_otg HCD state
- *
- * Must be called with interrupt disabled and spinlock held
- */
-static void dwc2_hcd_reinit(struct dwc2_hsotg *hsotg)
-{
- struct dwc2_host_chan *chan, *chan_tmp;
- int num_channels;
- int i;
-
- hsotg->flags.d32 = 0;
- hsotg->non_periodic_qh_ptr = &hsotg->non_periodic_sched_active;
-
- if (hsotg->core_params->uframe_sched > 0) {
- hsotg->available_host_channels =
- hsotg->core_params->host_channels;
- } else {
- hsotg->non_periodic_channels = 0;
- hsotg->periodic_channels = 0;
- }
-
- /*
- * Put all channels in the free channel list and clean up channel
- * states
- */
- list_for_each_entry_safe(chan, chan_tmp, &hsotg->free_hc_list,
- hc_list_entry)
- list_del_init(&chan->hc_list_entry);
-
- num_channels = hsotg->core_params->host_channels;
- for (i = 0; i < num_channels; i++) {
- chan = hsotg->hc_ptr_array[i];
- list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
- dwc2_hc_cleanup(hsotg, chan);
- }
-
- /* Initialize the DWC core for host mode operation */
- dwc2_core_host_init(hsotg);
-}
-
-static void dwc2_hc_init_split(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb)
-{
- int hub_addr, hub_port;
-
- chan->do_split = 1;
- chan->xact_pos = qtd->isoc_split_pos;
- chan->complete_split = qtd->complete_split;
- dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port);
- chan->hub_addr = (u8)hub_addr;
- chan->hub_port = (u8)hub_port;
-}
-
-static void *dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- struct dwc2_qtd *qtd, void *bufptr)
-{
- struct dwc2_hcd_urb *urb = qtd->urb;
- struct dwc2_hcd_iso_packet_desc *frame_desc;
-
- switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) {
- case USB_ENDPOINT_XFER_CONTROL:
- chan->ep_type = USB_ENDPOINT_XFER_CONTROL;
-
- switch (qtd->control_phase) {
- case DWC2_CONTROL_SETUP:
- dev_vdbg(hsotg->dev, " Control setup transaction\n");
- chan->do_ping = 0;
- chan->ep_is_in = 0;
- chan->data_pid_start = DWC2_HC_PID_SETUP;
- if (hsotg->core_params->dma_enable > 0)
- chan->xfer_dma = urb->setup_dma;
- else
- chan->xfer_buf = urb->setup_packet;
- chan->xfer_len = 8;
- bufptr = NULL;
- break;
-
- case DWC2_CONTROL_DATA:
- dev_vdbg(hsotg->dev, " Control data transaction\n");
- chan->data_pid_start = qtd->data_toggle;
- break;
-
- case DWC2_CONTROL_STATUS:
- /*
- * Direction is opposite of data direction or IN if no
- * data
- */
- dev_vdbg(hsotg->dev, " Control status transaction\n");
- if (urb->length == 0)
- chan->ep_is_in = 1;
- else
- chan->ep_is_in =
- dwc2_hcd_is_pipe_out(&urb->pipe_info);
- if (chan->ep_is_in)
- chan->do_ping = 0;
- chan->data_pid_start = DWC2_HC_PID_DATA1;
- chan->xfer_len = 0;
- if (hsotg->core_params->dma_enable > 0)
- chan->xfer_dma = hsotg->status_buf_dma;
- else
- chan->xfer_buf = hsotg->status_buf;
- bufptr = NULL;
- break;
- }
- break;
-
- case USB_ENDPOINT_XFER_BULK:
- chan->ep_type = USB_ENDPOINT_XFER_BULK;
- break;
-
- case USB_ENDPOINT_XFER_INT:
- chan->ep_type = USB_ENDPOINT_XFER_INT;
- break;
-
- case USB_ENDPOINT_XFER_ISOC:
- chan->ep_type = USB_ENDPOINT_XFER_ISOC;
- if (hsotg->core_params->dma_desc_enable > 0)
- break;
-
- frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
- frame_desc->status = 0;
-
- if (hsotg->core_params->dma_enable > 0) {
- chan->xfer_dma = urb->dma;
- chan->xfer_dma += frame_desc->offset +
- qtd->isoc_split_offset;
- } else {
- chan->xfer_buf = urb->buf;
- chan->xfer_buf += frame_desc->offset +
- qtd->isoc_split_offset;
- }
-
- chan->xfer_len = frame_desc->length - qtd->isoc_split_offset;
-
- /* For non-dword aligned buffers */
- if (hsotg->core_params->dma_enable > 0 &&
- (chan->xfer_dma & 0x3))
- bufptr = (u8 *)urb->buf + frame_desc->offset +
- qtd->isoc_split_offset;
- else
- bufptr = NULL;
-
- if (chan->xact_pos == DWC2_HCSPLT_XACTPOS_ALL) {
- if (chan->xfer_len <= 188)
- chan->xact_pos = DWC2_HCSPLT_XACTPOS_ALL;
- else
- chan->xact_pos = DWC2_HCSPLT_XACTPOS_BEGIN;
- }
- break;
- }
-
- return bufptr;
-}
-
-static int dwc2_hc_setup_align_buf(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- struct dwc2_host_chan *chan, void *bufptr)
-{
- u32 buf_size;
-
- if (chan->ep_type != USB_ENDPOINT_XFER_ISOC)
- buf_size = hsotg->core_params->max_transfer_size;
- else
- buf_size = 4096;
-
- if (!qh->dw_align_buf) {
- qh->dw_align_buf = dma_alloc_coherent(hsotg->dev, buf_size,
- &qh->dw_align_buf_dma,
- GFP_ATOMIC);
- if (!qh->dw_align_buf)
- return -ENOMEM;
- }
-
- if (!chan->ep_is_in && chan->xfer_len) {
- dma_sync_single_for_cpu(hsotg->dev, chan->xfer_dma, buf_size,
- DMA_TO_DEVICE);
- memcpy(qh->dw_align_buf, bufptr, chan->xfer_len);
- dma_sync_single_for_device(hsotg->dev, chan->xfer_dma, buf_size,
- DMA_TO_DEVICE);
- }
-
- chan->align_buf = qh->dw_align_buf_dma;
- return 0;
-}
-
-/**
- * dwc2_assign_and_init_hc() - Assigns transactions from a QTD to a free host
- * channel and initializes the host channel to perform the transactions. The
- * host channel is removed from the free list.
- *
- * @hsotg: The HCD state structure
- * @qh: Transactions from the first QTD for this QH are selected and assigned
- * to a free host channel
- */
-static int dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- struct dwc2_host_chan *chan;
- struct dwc2_hcd_urb *urb;
- struct dwc2_qtd *qtd;
- void *bufptr = NULL;
-
- if (dbg_qh(qh))
- dev_vdbg(hsotg->dev, "%s(%p,%p)\n", __func__, hsotg, qh);
-
- if (list_empty(&qh->qtd_list)) {
- dev_dbg(hsotg->dev, "No QTDs in QH list\n");
- return -ENOMEM;
- }
-
- if (list_empty(&hsotg->free_hc_list)) {
- dev_dbg(hsotg->dev, "No free channel to assign\n");
- return -ENOMEM;
- }
-
- chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan,
- hc_list_entry);
-
- /* Remove host channel from free list */
- list_del_init(&chan->hc_list_entry);
-
- qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry);
- urb = qtd->urb;
- qh->channel = chan;
- qtd->in_process = 1;
-
- /*
- * Use usb_pipedevice to determine device address. This address is
- * 0 before the SET_ADDRESS command and the correct address afterward.
- */
- chan->dev_addr = dwc2_hcd_get_dev_addr(&urb->pipe_info);
- chan->ep_num = dwc2_hcd_get_ep_num(&urb->pipe_info);
- chan->speed = qh->dev_speed;
- chan->max_packet = dwc2_max_packet(qh->maxp);
-
- chan->xfer_started = 0;
- chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS;
- chan->error_state = (qtd->error_count > 0);
- chan->halt_on_queue = 0;
- chan->halt_pending = 0;
- chan->requests = 0;
-
- /*
- * The following values may be modified in the transfer type section
- * below. The xfer_len value may be reduced when the transfer is
- * started to accommodate the max widths of the XferSize and PktCnt
- * fields in the HCTSIZn register.
- */
-
- chan->ep_is_in = (dwc2_hcd_is_pipe_in(&urb->pipe_info) != 0);
- if (chan->ep_is_in)
- chan->do_ping = 0;
- else
- chan->do_ping = qh->ping_state;
-
- chan->data_pid_start = qh->data_toggle;
- chan->multi_count = 1;
-
- if (urb->actual_length > urb->length &&
- !dwc2_hcd_is_pipe_in(&urb->pipe_info))
- urb->actual_length = urb->length;
-
- if (hsotg->core_params->dma_enable > 0) {
- chan->xfer_dma = urb->dma + urb->actual_length;
-
- /* For non-dword aligned case */
- if (hsotg->core_params->dma_desc_enable <= 0 &&
- (chan->xfer_dma & 0x3))
- bufptr = (u8 *)urb->buf + urb->actual_length;
- } else {
- chan->xfer_buf = (u8 *)urb->buf + urb->actual_length;
- }
-
- chan->xfer_len = urb->length - urb->actual_length;
- chan->xfer_count = 0;
-
- /* Set the split attributes if required */
- if (qh->do_split)
- dwc2_hc_init_split(hsotg, chan, qtd, urb);
- else
- chan->do_split = 0;
-
- /* Set the transfer attributes */
- bufptr = dwc2_hc_init_xfer(hsotg, chan, qtd, bufptr);
-
- /* Non DWORD-aligned buffer case */
- if (bufptr) {
- dev_vdbg(hsotg->dev, "Non-aligned buffer\n");
- if (dwc2_hc_setup_align_buf(hsotg, qh, chan, bufptr)) {
- dev_err(hsotg->dev,
- "%s: Failed to allocate memory to handle non-dword aligned buffer\n",
- __func__);
- /* Add channel back to free list */
- chan->align_buf = 0;
- chan->multi_count = 0;
- list_add_tail(&chan->hc_list_entry,
- &hsotg->free_hc_list);
- qtd->in_process = 0;
- qh->channel = NULL;
- return -ENOMEM;
- }
- } else {
- chan->align_buf = 0;
- }
-
- if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC)
- /*
- * This value may be modified when the transfer is started
- * to reflect the actual transfer length
- */
- chan->multi_count = dwc2_hb_mult(qh->maxp);
-
- if (hsotg->core_params->dma_desc_enable > 0)
- chan->desc_list_addr = qh->desc_list_dma;
-
- dwc2_hc_init(hsotg, chan);
- chan->qh = qh;
-
- return 0;
-}
-
-/**
- * dwc2_hcd_select_transactions() - Selects transactions from the HCD transfer
- * schedule and assigns them to available host channels. Called from the HCD
- * interrupt handler functions.
- *
- * @hsotg: The HCD state structure
- *
- * Return: The types of new transactions that were assigned to host channels
- */
-enum dwc2_transaction_type dwc2_hcd_select_transactions(
- struct dwc2_hsotg *hsotg)
-{
- enum dwc2_transaction_type ret_val = DWC2_TRANSACTION_NONE;
- struct list_head *qh_ptr;
- struct dwc2_qh *qh;
- int num_channels;
-
-#ifdef DWC2_DEBUG_SOF
- dev_vdbg(hsotg->dev, " Select Transactions\n");
-#endif
-
- /* Process entries in the periodic ready list */
- qh_ptr = hsotg->periodic_sched_ready.next;
- while (qh_ptr != &hsotg->periodic_sched_ready) {
- if (list_empty(&hsotg->free_hc_list))
- break;
- if (hsotg->core_params->uframe_sched > 0) {
- if (hsotg->available_host_channels <= 1)
- break;
- hsotg->available_host_channels--;
- }
- qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
- if (dwc2_assign_and_init_hc(hsotg, qh))
- break;
-
- /*
- * Move the QH from the periodic ready schedule to the
- * periodic assigned schedule
- */
- qh_ptr = qh_ptr->next;
- list_move(&qh->qh_list_entry, &hsotg->periodic_sched_assigned);
- ret_val = DWC2_TRANSACTION_PERIODIC;
- }
-
- /*
- * Process entries in the inactive portion of the non-periodic
- * schedule. Some free host channels may not be used if they are
- * reserved for periodic transfers.
- */
- num_channels = hsotg->core_params->host_channels;
- qh_ptr = hsotg->non_periodic_sched_inactive.next;
- while (qh_ptr != &hsotg->non_periodic_sched_inactive) {
- if (hsotg->core_params->uframe_sched <= 0 &&
- hsotg->non_periodic_channels >= num_channels -
- hsotg->periodic_channels)
- break;
- if (list_empty(&hsotg->free_hc_list))
- break;
- qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
- if (hsotg->core_params->uframe_sched > 0) {
- if (hsotg->available_host_channels < 1)
- break;
- hsotg->available_host_channels--;
- }
-
- if (dwc2_assign_and_init_hc(hsotg, qh))
- break;
-
- /*
- * Move the QH from the non-periodic inactive schedule to the
- * non-periodic active schedule
- */
- qh_ptr = qh_ptr->next;
- list_move(&qh->qh_list_entry,
- &hsotg->non_periodic_sched_active);
-
- if (ret_val == DWC2_TRANSACTION_NONE)
- ret_val = DWC2_TRANSACTION_NON_PERIODIC;
- else
- ret_val = DWC2_TRANSACTION_ALL;
-
- if (hsotg->core_params->uframe_sched <= 0)
- hsotg->non_periodic_channels++;
- }
-
- return ret_val;
-}
-
-/**
- * dwc2_queue_transaction() - Attempts to queue a single transaction request for
- * a host channel associated with either a periodic or non-periodic transfer
- *
- * @hsotg: The HCD state structure
- * @chan: Host channel descriptor associated with either a periodic or
- * non-periodic transfer
- * @fifo_dwords_avail: Number of DWORDs available in the periodic Tx FIFO
- * for periodic transfers or the non-periodic Tx FIFO
- * for non-periodic transfers
- *
- * Return: 1 if a request is queued and more requests may be needed to
- * complete the transfer, 0 if no more requests are required for this
- * transfer, -1 if there is insufficient space in the Tx FIFO
- *
- * This function assumes that there is space available in the appropriate
- * request queue. For an OUT transfer or SETUP transaction in Slave mode,
- * it checks whether space is available in the appropriate Tx FIFO.
- *
- * Must be called with interrupt disabled and spinlock held
- */
-static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- u16 fifo_dwords_avail)
-{
- int retval = 0;
-
- if (hsotg->core_params->dma_enable > 0) {
- if (hsotg->core_params->dma_desc_enable > 0) {
- if (!chan->xfer_started ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
- dwc2_hcd_start_xfer_ddma(hsotg, chan->qh);
- chan->qh->ping_state = 0;
- }
- } else if (!chan->xfer_started) {
- dwc2_hc_start_transfer(hsotg, chan);
- chan->qh->ping_state = 0;
- }
- } else if (chan->halt_pending) {
- /* Don't queue a request if the channel has been halted */
- } else if (chan->halt_on_queue) {
- dwc2_hc_halt(hsotg, chan, chan->halt_status);
- } else if (chan->do_ping) {
- if (!chan->xfer_started)
- dwc2_hc_start_transfer(hsotg, chan);
- } else if (!chan->ep_is_in ||
- chan->data_pid_start == DWC2_HC_PID_SETUP) {
- if ((fifo_dwords_avail * 4) >= chan->max_packet) {
- if (!chan->xfer_started) {
- dwc2_hc_start_transfer(hsotg, chan);
- retval = 1;
- } else {
- retval = dwc2_hc_continue_transfer(hsotg, chan);
- }
- } else {
- retval = -1;
- }
- } else {
- if (!chan->xfer_started) {
- dwc2_hc_start_transfer(hsotg, chan);
- retval = 1;
- } else {
- retval = dwc2_hc_continue_transfer(hsotg, chan);
- }
- }
-
- return retval;
-}
-
-/*
- * Processes periodic channels for the next frame and queues transactions for
- * these channels to the DWC_otg controller. After queueing transactions, the
- * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions
- * to queue as Periodic Tx FIFO or request queue space becomes available.
- * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled.
- *
- * Must be called with interrupt disabled and spinlock held
- */
-static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
-{
- struct list_head *qh_ptr;
- struct dwc2_qh *qh;
- u32 tx_status;
- u32 fspcavail;
- u32 gintmsk;
- int status;
- int no_queue_space = 0;
- int no_fifo_space = 0;
- u32 qspcavail;
-
- if (dbg_perio())
- dev_vdbg(hsotg->dev, "Queue periodic transactions\n");
-
- tx_status = readl(hsotg->regs + HPTXSTS);
- qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
- TXSTS_QSPCAVAIL_SHIFT;
- fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
- TXSTS_FSPCAVAIL_SHIFT;
-
- if (dbg_perio()) {
- dev_vdbg(hsotg->dev, " P Tx Req Queue Space Avail (before queue): %d\n",
- qspcavail);
- dev_vdbg(hsotg->dev, " P Tx FIFO Space Avail (before queue): %d\n",
- fspcavail);
- }
-
- qh_ptr = hsotg->periodic_sched_assigned.next;
- while (qh_ptr != &hsotg->periodic_sched_assigned) {
- tx_status = readl(hsotg->regs + HPTXSTS);
- qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
- TXSTS_QSPCAVAIL_SHIFT;
- if (qspcavail == 0) {
- no_queue_space = 1;
- break;
- }
-
- qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
- if (!qh->channel) {
- qh_ptr = qh_ptr->next;
- continue;
- }
-
- /* Make sure EP's TT buffer is clean before queueing qtds */
- if (qh->tt_buffer_dirty) {
- qh_ptr = qh_ptr->next;
- continue;
- }
-
- /*
- * Set a flag if we're queuing high-bandwidth in slave mode.
- * The flag prevents any halts to get into the request queue in
- * the middle of multiple high-bandwidth packets getting queued.
- */
- if (hsotg->core_params->dma_enable <= 0 &&
- qh->channel->multi_count > 1)
- hsotg->queuing_high_bandwidth = 1;
-
- fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
- TXSTS_FSPCAVAIL_SHIFT;
- status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
- if (status < 0) {
- no_fifo_space = 1;
- break;
- }
-
- /*
- * In Slave mode, stay on the current transfer until there is
- * nothing more to do or the high-bandwidth request count is
- * reached. In DMA mode, only need to queue one request. The
- * controller automatically handles multiple packets for
- * high-bandwidth transfers.
- */
- if (hsotg->core_params->dma_enable > 0 || status == 0 ||
- qh->channel->requests == qh->channel->multi_count) {
- qh_ptr = qh_ptr->next;
- /*
- * Move the QH from the periodic assigned schedule to
- * the periodic queued schedule
- */
- list_move(&qh->qh_list_entry,
- &hsotg->periodic_sched_queued);
-
- /* done queuing high bandwidth */
- hsotg->queuing_high_bandwidth = 0;
- }
- }
-
- if (hsotg->core_params->dma_enable <= 0) {
- tx_status = readl(hsotg->regs + HPTXSTS);
- qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
- TXSTS_QSPCAVAIL_SHIFT;
- fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
- TXSTS_FSPCAVAIL_SHIFT;
- if (dbg_perio()) {
- dev_vdbg(hsotg->dev,
- " P Tx Req Queue Space Avail (after queue): %d\n",
- qspcavail);
- dev_vdbg(hsotg->dev,
- " P Tx FIFO Space Avail (after queue): %d\n",
- fspcavail);
- }
-
- if (!list_empty(&hsotg->periodic_sched_assigned) ||
- no_queue_space || no_fifo_space) {
- /*
- * May need to queue more transactions as the request
- * queue or Tx FIFO empties. Enable the periodic Tx
- * FIFO empty interrupt. (Always use the half-empty
- * level to ensure that new requests are loaded as
- * soon as possible.)
- */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk |= GINTSTS_PTXFEMP;
- writel(gintmsk, hsotg->regs + GINTMSK);
- } else {
- /*
- * Disable the Tx FIFO empty interrupt since there are
- * no more transactions that need to be queued right
- * now. This function is called from interrupt
- * handlers to queue more transactions as transfer
- * states change.
- */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk &= ~GINTSTS_PTXFEMP;
- writel(gintmsk, hsotg->regs + GINTMSK);
- }
- }
-}
-
-/*
- * Processes active non-periodic channels and queues transactions for these
- * channels to the DWC_otg controller. After queueing transactions, the NP Tx
- * FIFO Empty interrupt is enabled if there are more transactions to queue as
- * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx
- * FIFO Empty interrupt is disabled.
- *
- * Must be called with interrupt disabled and spinlock held
- */
-static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg)
-{
- struct list_head *orig_qh_ptr;
- struct dwc2_qh *qh;
- u32 tx_status;
- u32 qspcavail;
- u32 fspcavail;
- u32 gintmsk;
- int status;
- int no_queue_space = 0;
- int no_fifo_space = 0;
- int more_to_do = 0;
-
- dev_vdbg(hsotg->dev, "Queue non-periodic transactions\n");
-
- tx_status = readl(hsotg->regs + GNPTXSTS);
- qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
- TXSTS_QSPCAVAIL_SHIFT;
- fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
- TXSTS_FSPCAVAIL_SHIFT;
- dev_vdbg(hsotg->dev, " NP Tx Req Queue Space Avail (before queue): %d\n",
- qspcavail);
- dev_vdbg(hsotg->dev, " NP Tx FIFO Space Avail (before queue): %d\n",
- fspcavail);
-
- /*
- * Keep track of the starting point. Skip over the start-of-list
- * entry.
- */
- if (hsotg->non_periodic_qh_ptr == &hsotg->non_periodic_sched_active)
- hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
- orig_qh_ptr = hsotg->non_periodic_qh_ptr;
-
- /*
- * Process once through the active list or until no more space is
- * available in the request queue or the Tx FIFO
- */
- do {
- tx_status = readl(hsotg->regs + GNPTXSTS);
- qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
- TXSTS_QSPCAVAIL_SHIFT;
- if (hsotg->core_params->dma_enable <= 0 && qspcavail == 0) {
- no_queue_space = 1;
- break;
- }
-
- qh = list_entry(hsotg->non_periodic_qh_ptr, struct dwc2_qh,
- qh_list_entry);
- if (!qh->channel)
- goto next;
-
- /* Make sure EP's TT buffer is clean before queueing qtds */
- if (qh->tt_buffer_dirty)
- goto next;
-
- fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
- TXSTS_FSPCAVAIL_SHIFT;
- status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
-
- if (status > 0) {
- more_to_do = 1;
- } else if (status < 0) {
- no_fifo_space = 1;
- break;
- }
-next:
- /* Advance to next QH, skipping start-of-list entry */
- hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
- if (hsotg->non_periodic_qh_ptr ==
- &hsotg->non_periodic_sched_active)
- hsotg->non_periodic_qh_ptr =
- hsotg->non_periodic_qh_ptr->next;
- } while (hsotg->non_periodic_qh_ptr != orig_qh_ptr);
-
- if (hsotg->core_params->dma_enable <= 0) {
- tx_status = readl(hsotg->regs + GNPTXSTS);
- qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
- TXSTS_QSPCAVAIL_SHIFT;
- fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
- TXSTS_FSPCAVAIL_SHIFT;
- dev_vdbg(hsotg->dev,
- " NP Tx Req Queue Space Avail (after queue): %d\n",
- qspcavail);
- dev_vdbg(hsotg->dev,
- " NP Tx FIFO Space Avail (after queue): %d\n",
- fspcavail);
-
- if (more_to_do || no_queue_space || no_fifo_space) {
- /*
- * May need to queue more transactions as the request
- * queue or Tx FIFO empties. Enable the non-periodic
- * Tx FIFO empty interrupt. (Always use the half-empty
- * level to ensure that new requests are loaded as
- * soon as possible.)
- */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk |= GINTSTS_NPTXFEMP;
- writel(gintmsk, hsotg->regs + GINTMSK);
- } else {
- /*
- * Disable the Tx FIFO empty interrupt since there are
- * no more transactions that need to be queued right
- * now. This function is called from interrupt
- * handlers to queue more transactions as transfer
- * states change.
- */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk &= ~GINTSTS_NPTXFEMP;
- writel(gintmsk, hsotg->regs + GINTMSK);
- }
- }
-}
-
-/**
- * dwc2_hcd_queue_transactions() - Processes the currently active host channels
- * and queues transactions for these channels to the DWC_otg controller. Called
- * from the HCD interrupt handler functions.
- *
- * @hsotg: The HCD state structure
- * @tr_type: The type(s) of transactions to queue (non-periodic, periodic,
- * or both)
- *
- * Must be called with interrupt disabled and spinlock held
- */
-void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
- enum dwc2_transaction_type tr_type)
-{
-#ifdef DWC2_DEBUG_SOF
- dev_vdbg(hsotg->dev, "Queue Transactions\n");
-#endif
- /* Process host channels associated with periodic transfers */
- if ((tr_type == DWC2_TRANSACTION_PERIODIC ||
- tr_type == DWC2_TRANSACTION_ALL) &&
- !list_empty(&hsotg->periodic_sched_assigned))
- dwc2_process_periodic_channels(hsotg);
-
- /* Process host channels associated with non-periodic transfers */
- if (tr_type == DWC2_TRANSACTION_NON_PERIODIC ||
- tr_type == DWC2_TRANSACTION_ALL) {
- if (!list_empty(&hsotg->non_periodic_sched_active)) {
- dwc2_process_non_periodic_channels(hsotg);
- } else {
- /*
- * Ensure NP Tx FIFO empty interrupt is disabled when
- * there are no non-periodic transfers to process
- */
- u32 gintmsk = readl(hsotg->regs + GINTMSK);
-
- gintmsk &= ~GINTSTS_NPTXFEMP;
- writel(gintmsk, hsotg->regs + GINTMSK);
- }
- }
-}
-
-static void dwc2_conn_id_status_change(struct work_struct *work)
-{
- struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
- wf_otg);
- u32 count = 0;
- u32 gotgctl;
-
- dev_dbg(hsotg->dev, "%s()\n", __func__);
-
- gotgctl = readl(hsotg->regs + GOTGCTL);
- dev_dbg(hsotg->dev, "gotgctl=%0x\n", gotgctl);
- dev_dbg(hsotg->dev, "gotgctl.b.conidsts=%d\n",
- !!(gotgctl & GOTGCTL_CONID_B));
-
- /* B-Device connector (Device Mode) */
- if (gotgctl & GOTGCTL_CONID_B) {
- /* Wait for switch to device mode */
- dev_dbg(hsotg->dev, "connId B\n");
- while (!dwc2_is_device_mode(hsotg)) {
- dev_info(hsotg->dev,
- "Waiting for Peripheral Mode, Mode=%s\n",
- dwc2_is_host_mode(hsotg) ? "Host" :
- "Peripheral");
- usleep_range(20000, 40000);
- if (++count > 250)
- break;
- }
- if (count > 250)
- dev_err(hsotg->dev,
- "Connection id status change timed out\n");
- hsotg->op_state = OTG_STATE_B_PERIPHERAL;
- dwc2_core_init(hsotg, false, -1);
- dwc2_enable_global_interrupts(hsotg);
- } else {
- /* A-Device connector (Host Mode) */
- dev_dbg(hsotg->dev, "connId A\n");
- while (!dwc2_is_host_mode(hsotg)) {
- dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n",
- dwc2_is_host_mode(hsotg) ?
- "Host" : "Peripheral");
- usleep_range(20000, 40000);
- if (++count > 250)
- break;
- }
- if (count > 250)
- dev_err(hsotg->dev,
- "Connection id status change timed out\n");
- hsotg->op_state = OTG_STATE_A_HOST;
-
- /* Initialize the Core for Host mode */
- dwc2_core_init(hsotg, false, -1);
- dwc2_enable_global_interrupts(hsotg);
- dwc2_hcd_start(hsotg);
- }
-}
-
-static void dwc2_wakeup_detected(unsigned long data)
-{
- struct dwc2_hsotg *hsotg = (struct dwc2_hsotg *)data;
- u32 hprt0;
-
- dev_dbg(hsotg->dev, "%s()\n", __func__);
-
- /*
- * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms
- * so that OPT tests pass with all PHYs.)
- */
- hprt0 = dwc2_read_hprt0(hsotg);
- dev_dbg(hsotg->dev, "Resume: HPRT0=%0x\n", hprt0);
- hprt0 &= ~HPRT0_RES;
- writel(hprt0, hsotg->regs + HPRT0);
- dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n",
- readl(hsotg->regs + HPRT0));
-
- dwc2_hcd_rem_wakeup(hsotg);
-
- /* Change to L0 state */
- hsotg->lx_state = DWC2_L0;
-}
-
-static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg)
-{
- struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
-
- return hcd->self.b_hnp_enable;
-}
-
-/* Must NOT be called with interrupt disabled or spinlock held */
-static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
-{
- unsigned long flags;
- u32 hprt0;
- u32 pcgctl;
- u32 gotgctl;
-
- dev_dbg(hsotg->dev, "%s()\n", __func__);
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- if (windex == hsotg->otg_port && dwc2_host_is_b_hnp_enabled(hsotg)) {
- gotgctl = readl(hsotg->regs + GOTGCTL);
- gotgctl |= GOTGCTL_HSTSETHNPEN;
- writel(gotgctl, hsotg->regs + GOTGCTL);
- hsotg->op_state = OTG_STATE_A_SUSPEND;
- }
-
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 |= HPRT0_SUSP;
- writel(hprt0, hsotg->regs + HPRT0);
-
- /* Update lx_state */
- hsotg->lx_state = DWC2_L2;
-
- /* Suspend the Phy Clock */
- pcgctl = readl(hsotg->regs + PCGCTL);
- pcgctl |= PCGCTL_STOPPCLK;
- writel(pcgctl, hsotg->regs + PCGCTL);
- udelay(10);
-
- /* For HNP the bus must be suspended for at least 200ms */
- if (dwc2_host_is_b_hnp_enabled(hsotg)) {
- pcgctl = readl(hsotg->regs + PCGCTL);
- pcgctl &= ~PCGCTL_STOPPCLK;
- writel(pcgctl, hsotg->regs + PCGCTL);
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
-
- usleep_range(200000, 250000);
- } else {
- spin_unlock_irqrestore(&hsotg->lock, flags);
- }
-}
-
-/* Handles hub class-specific requests */
-static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
- u16 wvalue, u16 windex, char *buf, u16 wlength)
-{
- struct usb_hub_descriptor *hub_desc;
- int retval = 0;
- u32 hprt0;
- u32 port_status;
- u32 speed;
- u32 pcgctl;
-
- switch (typereq) {
- case ClearHubFeature:
- dev_dbg(hsotg->dev, "ClearHubFeature %1xh\n", wvalue);
-
- switch (wvalue) {
- case C_HUB_LOCAL_POWER:
- case C_HUB_OVER_CURRENT:
- /* Nothing required here */
- break;
-
- default:
- retval = -EINVAL;
- dev_err(hsotg->dev,
- "ClearHubFeature request %1xh unknown\n",
- wvalue);
- }
- break;
-
- case ClearPortFeature:
- if (wvalue != USB_PORT_FEAT_L1)
- if (!windex || windex > 1)
- goto error;
- switch (wvalue) {
- case USB_PORT_FEAT_ENABLE:
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_ENABLE\n");
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 |= HPRT0_ENA;
- writel(hprt0, hsotg->regs + HPRT0);
- break;
-
- case USB_PORT_FEAT_SUSPEND:
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_SUSPEND\n");
- writel(0, hsotg->regs + PCGCTL);
- usleep_range(20000, 40000);
-
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 |= HPRT0_RES;
- writel(hprt0, hsotg->regs + HPRT0);
- hprt0 &= ~HPRT0_SUSP;
- usleep_range(100000, 150000);
-
- hprt0 &= ~HPRT0_RES;
- writel(hprt0, hsotg->regs + HPRT0);
- break;
-
- case USB_PORT_FEAT_POWER:
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_POWER\n");
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 &= ~HPRT0_PWR;
- writel(hprt0, hsotg->regs + HPRT0);
- break;
-
- case USB_PORT_FEAT_INDICATOR:
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_INDICATOR\n");
- /* Port indicator not supported */
- break;
-
- case USB_PORT_FEAT_C_CONNECTION:
- /*
- * Clears driver's internal Connect Status Change flag
- */
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n");
- hsotg->flags.b.port_connect_status_change = 0;
- break;
-
- case USB_PORT_FEAT_C_RESET:
- /* Clears driver's internal Port Reset Change flag */
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_C_RESET\n");
- hsotg->flags.b.port_reset_change = 0;
- break;
-
- case USB_PORT_FEAT_C_ENABLE:
- /*
- * Clears the driver's internal Port Enable/Disable
- * Change flag
- */
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n");
- hsotg->flags.b.port_enable_change = 0;
- break;
-
- case USB_PORT_FEAT_C_SUSPEND:
- /*
- * Clears the driver's internal Port Suspend Change
- * flag, which is set when resume signaling on the host
- * port is complete
- */
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n");
- hsotg->flags.b.port_suspend_change = 0;
- break;
-
- case USB_PORT_FEAT_C_PORT_L1:
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_C_PORT_L1\n");
- hsotg->flags.b.port_l1_change = 0;
- break;
-
- case USB_PORT_FEAT_C_OVER_CURRENT:
- dev_dbg(hsotg->dev,
- "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n");
- hsotg->flags.b.port_over_current_change = 0;
- break;
-
- default:
- retval = -EINVAL;
- dev_err(hsotg->dev,
- "ClearPortFeature request %1xh unknown or unsupported\n",
- wvalue);
- }
- break;
-
- case GetHubDescriptor:
- dev_dbg(hsotg->dev, "GetHubDescriptor\n");
- hub_desc = (struct usb_hub_descriptor *)buf;
- hub_desc->bDescLength = 9;
- hub_desc->bDescriptorType = 0x29;
- hub_desc->bNbrPorts = 1;
- hub_desc->wHubCharacteristics = cpu_to_le16(0x08);
- hub_desc->bPwrOn2PwrGood = 1;
- hub_desc->bHubContrCurrent = 0;
- hub_desc->u.hs.DeviceRemovable[0] = 0;
- hub_desc->u.hs.DeviceRemovable[1] = 0xff;
- break;
-
- case GetHubStatus:
- dev_dbg(hsotg->dev, "GetHubStatus\n");
- memset(buf, 0, 4);
- break;
-
- case GetPortStatus:
- dev_vdbg(hsotg->dev,
- "GetPortStatus wIndex=0x%04x flags=0x%08x\n", windex,
- hsotg->flags.d32);
- if (!windex || windex > 1)
- goto error;
-
- port_status = 0;
- if (hsotg->flags.b.port_connect_status_change)
- port_status |= USB_PORT_STAT_C_CONNECTION << 16;
- if (hsotg->flags.b.port_enable_change)
- port_status |= USB_PORT_STAT_C_ENABLE << 16;
- if (hsotg->flags.b.port_suspend_change)
- port_status |= USB_PORT_STAT_C_SUSPEND << 16;
- if (hsotg->flags.b.port_l1_change)
- port_status |= USB_PORT_STAT_C_L1 << 16;
- if (hsotg->flags.b.port_reset_change)
- port_status |= USB_PORT_STAT_C_RESET << 16;
- if (hsotg->flags.b.port_over_current_change) {
- dev_warn(hsotg->dev, "Overcurrent change detected\n");
- port_status |= USB_PORT_STAT_C_OVERCURRENT << 16;
- }
-
- if (!hsotg->flags.b.port_connect_status) {
- /*
- * The port is disconnected, which means the core is
- * either in device mode or it soon will be. Just
- * return 0's for the remainder of the port status
- * since the port register can't be read if the core
- * is in device mode.
- */
- *(__le32 *)buf = cpu_to_le32(port_status);
- break;
- }
-
- hprt0 = readl(hsotg->regs + HPRT0);
- dev_vdbg(hsotg->dev, " HPRT0: 0x%08x\n", hprt0);
-
- if (hprt0 & HPRT0_CONNSTS)
- port_status |= USB_PORT_STAT_CONNECTION;
- if (hprt0 & HPRT0_ENA)
- port_status |= USB_PORT_STAT_ENABLE;
- if (hprt0 & HPRT0_SUSP)
- port_status |= USB_PORT_STAT_SUSPEND;
- if (hprt0 & HPRT0_OVRCURRACT)
- port_status |= USB_PORT_STAT_OVERCURRENT;
- if (hprt0 & HPRT0_RST)
- port_status |= USB_PORT_STAT_RESET;
- if (hprt0 & HPRT0_PWR)
- port_status |= USB_PORT_STAT_POWER;
-
- speed = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
- if (speed == HPRT0_SPD_HIGH_SPEED)
- port_status |= USB_PORT_STAT_HIGH_SPEED;
- else if (speed == HPRT0_SPD_LOW_SPEED)
- port_status |= USB_PORT_STAT_LOW_SPEED;
-
- if (hprt0 & HPRT0_TSTCTL_MASK)
- port_status |= USB_PORT_STAT_TEST;
- /* USB_PORT_FEAT_INDICATOR unsupported always 0 */
-
- dev_vdbg(hsotg->dev, "port_status=%08x\n", port_status);
- *(__le32 *)buf = cpu_to_le32(port_status);
- break;
-
- case SetHubFeature:
- dev_dbg(hsotg->dev, "SetHubFeature\n");
- /* No HUB features supported */
- break;
-
- case SetPortFeature:
- dev_dbg(hsotg->dev, "SetPortFeature\n");
- if (wvalue != USB_PORT_FEAT_TEST && (!windex || windex > 1))
- goto error;
-
- if (!hsotg->flags.b.port_connect_status) {
- /*
- * The port is disconnected, which means the core is
- * either in device mode or it soon will be. Just
- * return without doing anything since the port
- * register can't be written if the core is in device
- * mode.
- */
- break;
- }
-
- switch (wvalue) {
- case USB_PORT_FEAT_SUSPEND:
- dev_dbg(hsotg->dev,
- "SetPortFeature - USB_PORT_FEAT_SUSPEND\n");
- if (windex != hsotg->otg_port)
- goto error;
- dwc2_port_suspend(hsotg, windex);
- break;
-
- case USB_PORT_FEAT_POWER:
- dev_dbg(hsotg->dev,
- "SetPortFeature - USB_PORT_FEAT_POWER\n");
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 |= HPRT0_PWR;
- writel(hprt0, hsotg->regs + HPRT0);
- break;
-
- case USB_PORT_FEAT_RESET:
- hprt0 = dwc2_read_hprt0(hsotg);
- dev_dbg(hsotg->dev,
- "SetPortFeature - USB_PORT_FEAT_RESET\n");
- pcgctl = readl(hsotg->regs + PCGCTL);
- pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK);
- writel(pcgctl, hsotg->regs + PCGCTL);
- /* ??? Original driver does this */
- writel(0, hsotg->regs + PCGCTL);
-
- hprt0 = dwc2_read_hprt0(hsotg);
- /* Clear suspend bit if resetting from suspend state */
- hprt0 &= ~HPRT0_SUSP;
-
- /*
- * When B-Host the Port reset bit is set in the Start
- * HCD Callback function, so that the reset is started
- * within 1ms of the HNP success interrupt
- */
- if (!dwc2_hcd_is_b_host(hsotg)) {
- hprt0 |= HPRT0_PWR | HPRT0_RST;
- dev_dbg(hsotg->dev,
- "In host mode, hprt0=%08x\n", hprt0);
- writel(hprt0, hsotg->regs + HPRT0);
- }
-
- /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
- usleep_range(50000, 70000);
- hprt0 &= ~HPRT0_RST;
- writel(hprt0, hsotg->regs + HPRT0);
- hsotg->lx_state = DWC2_L0; /* Now back to On state */
- break;
-
- case USB_PORT_FEAT_INDICATOR:
- dev_dbg(hsotg->dev,
- "SetPortFeature - USB_PORT_FEAT_INDICATOR\n");
- /* Not supported */
- break;
-
- default:
- retval = -EINVAL;
- dev_err(hsotg->dev,
- "SetPortFeature %1xh unknown or unsupported\n",
- wvalue);
- break;
- }
- break;
-
- default:
-error:
- retval = -EINVAL;
- dev_dbg(hsotg->dev,
- "Unknown hub control request: %1xh wIndex: %1xh wValue: %1xh\n",
- typereq, windex, wvalue);
- break;
- }
-
- return retval;
-}
-
-static int dwc2_hcd_is_status_changed(struct dwc2_hsotg *hsotg, int port)
-{
- int retval;
-
- if (port != 1)
- return -EINVAL;
-
- retval = (hsotg->flags.b.port_connect_status_change ||
- hsotg->flags.b.port_reset_change ||
- hsotg->flags.b.port_enable_change ||
- hsotg->flags.b.port_suspend_change ||
- hsotg->flags.b.port_over_current_change);
-
- if (retval) {
- dev_dbg(hsotg->dev,
- "DWC OTG HCD HUB STATUS DATA: Root port status changed\n");
- dev_dbg(hsotg->dev, " port_connect_status_change: %d\n",
- hsotg->flags.b.port_connect_status_change);
- dev_dbg(hsotg->dev, " port_reset_change: %d\n",
- hsotg->flags.b.port_reset_change);
- dev_dbg(hsotg->dev, " port_enable_change: %d\n",
- hsotg->flags.b.port_enable_change);
- dev_dbg(hsotg->dev, " port_suspend_change: %d\n",
- hsotg->flags.b.port_suspend_change);
- dev_dbg(hsotg->dev, " port_over_current_change: %d\n",
- hsotg->flags.b.port_over_current_change);
- }
-
- return retval;
-}
-
-int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg)
-{
- u32 hfnum = readl(hsotg->regs + HFNUM);
-
-#ifdef DWC2_DEBUG_SOF
- dev_vdbg(hsotg->dev, "DWC OTG HCD GET FRAME NUMBER %d\n",
- (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT);
-#endif
- return (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT;
-}
-
-int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg)
-{
- return hsotg->op_state == OTG_STATE_B_HOST;
-}
-
-static struct dwc2_hcd_urb *dwc2_hcd_urb_alloc(struct dwc2_hsotg *hsotg,
- int iso_desc_count,
- gfp_t mem_flags)
-{
- struct dwc2_hcd_urb *urb;
- u32 size = sizeof(*urb) + iso_desc_count *
- sizeof(struct dwc2_hcd_iso_packet_desc);
-
- urb = kzalloc(size, mem_flags);
- if (urb)
- urb->packet_count = iso_desc_count;
- return urb;
-}
-
-static void dwc2_hcd_urb_set_pipeinfo(struct dwc2_hsotg *hsotg,
- struct dwc2_hcd_urb *urb, u8 dev_addr,
- u8 ep_num, u8 ep_type, u8 ep_dir, u16 mps)
-{
- if (dbg_perio() ||
- ep_type == USB_ENDPOINT_XFER_BULK ||
- ep_type == USB_ENDPOINT_XFER_CONTROL)
- dev_vdbg(hsotg->dev,
- "addr=%d, ep_num=%d, ep_dir=%1x, ep_type=%1x, mps=%d\n",
- dev_addr, ep_num, ep_dir, ep_type, mps);
- urb->pipe_info.dev_addr = dev_addr;
- urb->pipe_info.ep_num = ep_num;
- urb->pipe_info.pipe_type = ep_type;
- urb->pipe_info.pipe_dir = ep_dir;
- urb->pipe_info.mps = mps;
-}
-
-/*
- * NOTE: This function will be removed once the peripheral controller code
- * is integrated and the driver is stable
- */
-void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg)
-{
-#ifdef DEBUG
- struct dwc2_host_chan *chan;
- struct dwc2_hcd_urb *urb;
- struct dwc2_qtd *qtd;
- int num_channels;
- u32 np_tx_status;
- u32 p_tx_status;
- int i;
-
- num_channels = hsotg->core_params->host_channels;
- dev_dbg(hsotg->dev, "\n");
- dev_dbg(hsotg->dev,
- "************************************************************\n");
- dev_dbg(hsotg->dev, "HCD State:\n");
- dev_dbg(hsotg->dev, " Num channels: %d\n", num_channels);
-
- for (i = 0; i < num_channels; i++) {
- chan = hsotg->hc_ptr_array[i];
- dev_dbg(hsotg->dev, " Channel %d:\n", i);
- dev_dbg(hsotg->dev,
- " dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
- chan->dev_addr, chan->ep_num, chan->ep_is_in);
- dev_dbg(hsotg->dev, " speed: %d\n", chan->speed);
- dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type);
- dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
- dev_dbg(hsotg->dev, " data_pid_start: %d\n",
- chan->data_pid_start);
- dev_dbg(hsotg->dev, " multi_count: %d\n", chan->multi_count);
- dev_dbg(hsotg->dev, " xfer_started: %d\n",
- chan->xfer_started);
- dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf);
- dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
- (unsigned long)chan->xfer_dma);
- dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len);
- dev_dbg(hsotg->dev, " xfer_count: %d\n", chan->xfer_count);
- dev_dbg(hsotg->dev, " halt_on_queue: %d\n",
- chan->halt_on_queue);
- dev_dbg(hsotg->dev, " halt_pending: %d\n",
- chan->halt_pending);
- dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status);
- dev_dbg(hsotg->dev, " do_split: %d\n", chan->do_split);
- dev_dbg(hsotg->dev, " complete_split: %d\n",
- chan->complete_split);
- dev_dbg(hsotg->dev, " hub_addr: %d\n", chan->hub_addr);
- dev_dbg(hsotg->dev, " hub_port: %d\n", chan->hub_port);
- dev_dbg(hsotg->dev, " xact_pos: %d\n", chan->xact_pos);
- dev_dbg(hsotg->dev, " requests: %d\n", chan->requests);
- dev_dbg(hsotg->dev, " qh: %p\n", chan->qh);
-
- if (chan->xfer_started) {
- u32 hfnum, hcchar, hctsiz, hcint, hcintmsk;
-
- hfnum = readl(hsotg->regs + HFNUM);
- hcchar = readl(hsotg->regs + HCCHAR(i));
- hctsiz = readl(hsotg->regs + HCTSIZ(i));
- hcint = readl(hsotg->regs + HCINT(i));
- hcintmsk = readl(hsotg->regs + HCINTMSK(i));
- dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", hfnum);
- dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar);
- dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", hctsiz);
- dev_dbg(hsotg->dev, " hcint: 0x%08x\n", hcint);
- dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", hcintmsk);
- }
-
- if (!(chan->xfer_started && chan->qh))
- continue;
-
- list_for_each_entry(qtd, &chan->qh->qtd_list, qtd_list_entry) {
- if (!qtd->in_process)
- break;
- urb = qtd->urb;
- dev_dbg(hsotg->dev, " URB Info:\n");
- dev_dbg(hsotg->dev, " qtd: %p, urb: %p\n",
- qtd, urb);
- if (urb) {
- dev_dbg(hsotg->dev,
- " Dev: %d, EP: %d %s\n",
- dwc2_hcd_get_dev_addr(&urb->pipe_info),
- dwc2_hcd_get_ep_num(&urb->pipe_info),
- dwc2_hcd_is_pipe_in(&urb->pipe_info) ?
- "IN" : "OUT");
- dev_dbg(hsotg->dev,
- " Max packet size: %d\n",
- dwc2_hcd_get_mps(&urb->pipe_info));
- dev_dbg(hsotg->dev,
- " transfer_buffer: %p\n",
- urb->buf);
- dev_dbg(hsotg->dev,
- " transfer_dma: %08lx\n",
- (unsigned long)urb->dma);
- dev_dbg(hsotg->dev,
- " transfer_buffer_length: %d\n",
- urb->length);
- dev_dbg(hsotg->dev, " actual_length: %d\n",
- urb->actual_length);
- }
- }
- }
-
- dev_dbg(hsotg->dev, " non_periodic_channels: %d\n",
- hsotg->non_periodic_channels);
- dev_dbg(hsotg->dev, " periodic_channels: %d\n",
- hsotg->periodic_channels);
- dev_dbg(hsotg->dev, " periodic_usecs: %d\n", hsotg->periodic_usecs);
- np_tx_status = readl(hsotg->regs + GNPTXSTS);
- dev_dbg(hsotg->dev, " NP Tx Req Queue Space Avail: %d\n",
- (np_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT);
- dev_dbg(hsotg->dev, " NP Tx FIFO Space Avail: %d\n",
- (np_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT);
- p_tx_status = readl(hsotg->regs + HPTXSTS);
- dev_dbg(hsotg->dev, " P Tx Req Queue Space Avail: %d\n",
- (p_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT);
- dev_dbg(hsotg->dev, " P Tx FIFO Space Avail: %d\n",
- (p_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT);
- dwc2_hcd_dump_frrem(hsotg);
- dwc2_dump_global_registers(hsotg);
- dwc2_dump_host_registers(hsotg);
- dev_dbg(hsotg->dev,
- "************************************************************\n");
- dev_dbg(hsotg->dev, "\n");
-#endif
-}
-
-/*
- * NOTE: This function will be removed once the peripheral controller code
- * is integrated and the driver is stable
- */
-void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg)
-{
-#ifdef DWC2_DUMP_FRREM
- dev_dbg(hsotg->dev, "Frame remaining at SOF:\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->frrem_samples, hsotg->frrem_accum,
- hsotg->frrem_samples > 0 ?
- hsotg->frrem_accum / hsotg->frrem_samples : 0);
- dev_dbg(hsotg->dev, "\n");
- dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 7):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_7_samples,
- hsotg->hfnum_7_frrem_accum,
- hsotg->hfnum_7_samples > 0 ?
- hsotg->hfnum_7_frrem_accum / hsotg->hfnum_7_samples : 0);
- dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 0):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_0_samples,
- hsotg->hfnum_0_frrem_accum,
- hsotg->hfnum_0_samples > 0 ?
- hsotg->hfnum_0_frrem_accum / hsotg->hfnum_0_samples : 0);
- dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 1-6):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_other_samples,
- hsotg->hfnum_other_frrem_accum,
- hsotg->hfnum_other_samples > 0 ?
- hsotg->hfnum_other_frrem_accum / hsotg->hfnum_other_samples :
- 0);
- dev_dbg(hsotg->dev, "\n");
- dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 7):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_7_samples_a, hsotg->hfnum_7_frrem_accum_a,
- hsotg->hfnum_7_samples_a > 0 ?
- hsotg->hfnum_7_frrem_accum_a / hsotg->hfnum_7_samples_a : 0);
- dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 0):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_0_samples_a, hsotg->hfnum_0_frrem_accum_a,
- hsotg->hfnum_0_samples_a > 0 ?
- hsotg->hfnum_0_frrem_accum_a / hsotg->hfnum_0_samples_a : 0);
- dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 1-6):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_other_samples_a, hsotg->hfnum_other_frrem_accum_a,
- hsotg->hfnum_other_samples_a > 0 ?
- hsotg->hfnum_other_frrem_accum_a / hsotg->hfnum_other_samples_a
- : 0);
- dev_dbg(hsotg->dev, "\n");
- dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 7):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_7_samples_b, hsotg->hfnum_7_frrem_accum_b,
- hsotg->hfnum_7_samples_b > 0 ?
- hsotg->hfnum_7_frrem_accum_b / hsotg->hfnum_7_samples_b : 0);
- dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 0):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_0_samples_b, hsotg->hfnum_0_frrem_accum_b,
- (hsotg->hfnum_0_samples_b > 0) ?
- hsotg->hfnum_0_frrem_accum_b / hsotg->hfnum_0_samples_b : 0);
- dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 1-6):\n");
- dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
- hsotg->hfnum_other_samples_b, hsotg->hfnum_other_frrem_accum_b,
- (hsotg->hfnum_other_samples_b > 0) ?
- hsotg->hfnum_other_frrem_accum_b / hsotg->hfnum_other_samples_b
- : 0);
-#endif
-}
-
-struct wrapper_priv_data {
- struct dwc2_hsotg *hsotg;
-};
-
-/* Gets the dwc2_hsotg from a usb_hcd */
-static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd)
-{
- struct wrapper_priv_data *p;
-
- p = (struct wrapper_priv_data *) &hcd->hcd_priv;
- return p->hsotg;
-}
-
-static int _dwc2_hcd_start(struct usb_hcd *hcd);
-
-void dwc2_host_start(struct dwc2_hsotg *hsotg)
-{
- struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
-
- hcd->self.is_b_host = dwc2_hcd_is_b_host(hsotg);
- _dwc2_hcd_start(hcd);
-}
-
-void dwc2_host_disconnect(struct dwc2_hsotg *hsotg)
-{
- struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
-
- hcd->self.is_b_host = 0;
-}
-
-void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context, int *hub_addr,
- int *hub_port)
-{
- struct urb *urb = context;
-
- if (urb->dev->tt)
- *hub_addr = urb->dev->tt->hub->devnum;
- else
- *hub_addr = 0;
- *hub_port = urb->dev->ttport;
-}
-
-int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context)
-{
- struct urb *urb = context;
-
- return urb->dev->speed;
-}
-
-static void dwc2_allocate_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
- struct urb *urb)
-{
- struct usb_bus *bus = hcd_to_bus(hcd);
-
- if (urb->interval)
- bus->bandwidth_allocated += bw / urb->interval;
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
- bus->bandwidth_isoc_reqs++;
- else
- bus->bandwidth_int_reqs++;
-}
-
-static void dwc2_free_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
- struct urb *urb)
-{
- struct usb_bus *bus = hcd_to_bus(hcd);
-
- if (urb->interval)
- bus->bandwidth_allocated -= bw / urb->interval;
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
- bus->bandwidth_isoc_reqs--;
- else
- bus->bandwidth_int_reqs--;
-}
-
-/*
- * Sets the final status of an URB and returns it to the upper layer. Any
- * required cleanup of the URB is performed.
- *
- * Must be called with interrupt disabled and spinlock held
- */
-void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
- int status)
-{
- struct urb *urb;
- int i;
-
- if (!qtd) {
- dev_dbg(hsotg->dev, "## %s: qtd is NULL ##\n", __func__);
- return;
- }
-
- if (!qtd->urb) {
- dev_dbg(hsotg->dev, "## %s: qtd->urb is NULL ##\n", __func__);
- return;
- }
-
- urb = qtd->urb->priv;
- if (!urb) {
- dev_dbg(hsotg->dev, "## %s: urb->priv is NULL ##\n", __func__);
- return;
- }
-
- urb->actual_length = dwc2_hcd_urb_get_actual_length(qtd->urb);
-
- if (dbg_urb(urb))
- dev_vdbg(hsotg->dev,
- "%s: urb %p device %d ep %d-%s status %d actual %d\n",
- __func__, urb, usb_pipedevice(urb->pipe),
- usb_pipeendpoint(urb->pipe),
- usb_pipein(urb->pipe) ? "IN" : "OUT", status,
- urb->actual_length);
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS && dbg_perio()) {
- for (i = 0; i < urb->number_of_packets; i++)
- dev_vdbg(hsotg->dev, " ISO Desc %d status %d\n",
- i, urb->iso_frame_desc[i].status);
- }
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- urb->error_count = dwc2_hcd_urb_get_error_count(qtd->urb);
- for (i = 0; i < urb->number_of_packets; ++i) {
- urb->iso_frame_desc[i].actual_length =
- dwc2_hcd_urb_get_iso_desc_actual_length(
- qtd->urb, i);
- urb->iso_frame_desc[i].status =
- dwc2_hcd_urb_get_iso_desc_status(qtd->urb, i);
- }
- }
-
- urb->status = status;
- if (!status) {
- if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
- urb->actual_length < urb->transfer_buffer_length)
- urb->status = -EREMOTEIO;
- }
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
- usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
- struct usb_host_endpoint *ep = urb->ep;
-
- if (ep)
- dwc2_free_bus_bandwidth(dwc2_hsotg_to_hcd(hsotg),
- dwc2_hcd_get_ep_bandwidth(hsotg, ep),
- urb);
- }
-
- usb_hcd_unlink_urb_from_ep(dwc2_hsotg_to_hcd(hsotg), urb);
- urb->hcpriv = NULL;
- kfree(qtd->urb);
- qtd->urb = NULL;
-
- spin_unlock(&hsotg->lock);
- usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status);
- spin_lock(&hsotg->lock);
-}
-
-/*
- * Work queue function for starting the HCD when A-Cable is connected
- */
-static void dwc2_hcd_start_func(struct work_struct *work)
-{
- struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
- start_work.work);
-
- dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg);
- dwc2_host_start(hsotg);
-}
-
-/*
- * Reset work queue function
- */
-static void dwc2_hcd_reset_func(struct work_struct *work)
-{
- struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
- reset_work.work);
- u32 hprt0;
-
- dev_dbg(hsotg->dev, "USB RESET function called\n");
- hprt0 = dwc2_read_hprt0(hsotg);
- hprt0 &= ~HPRT0_RST;
- writel(hprt0, hsotg->regs + HPRT0);
- hsotg->flags.b.port_reset_change = 1;
-}
-
-/*
- * =========================================================================
- * Linux HC Driver Functions
- * =========================================================================
- */
-
-/*
- * Initializes the DWC_otg controller and its root hub and prepares it for host
- * mode operation. Activates the root port. Returns 0 on success and a negative
- * error code on failure.
- */
-static int _dwc2_hcd_start(struct usb_hcd *hcd)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
- struct usb_bus *bus = hcd_to_bus(hcd);
- unsigned long flags;
-
- dev_dbg(hsotg->dev, "DWC OTG HCD START\n");
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- hcd->state = HC_STATE_RUNNING;
-
- if (dwc2_is_device_mode(hsotg)) {
- spin_unlock_irqrestore(&hsotg->lock, flags);
- return 0; /* why 0 ?? */
- }
-
- dwc2_hcd_reinit(hsotg);
-
- /* Initialize and connect root hub if one is not already attached */
- if (bus->root_hub) {
- dev_dbg(hsotg->dev, "DWC OTG HCD Has Root Hub\n");
- /* Inform the HUB driver to resume */
- usb_hcd_resume_root_hub(hcd);
- }
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
- return 0;
-}
-
-/*
- * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
- * stopped.
- */
-static void _dwc2_hcd_stop(struct usb_hcd *hcd)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
- unsigned long flags;
-
- spin_lock_irqsave(&hsotg->lock, flags);
- dwc2_hcd_stop(hsotg);
- spin_unlock_irqrestore(&hsotg->lock, flags);
-
- usleep_range(1000, 3000);
-}
-
-/* Returns the current frame number */
-static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
-
- return dwc2_hcd_get_frame_number(hsotg);
-}
-
-static void dwc2_dump_urb_info(struct usb_hcd *hcd, struct urb *urb,
- char *fn_name)
-{
-#ifdef VERBOSE_DEBUG
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
- char *pipetype;
- char *speed;
-
- dev_vdbg(hsotg->dev, "%s, urb %p\n", fn_name, urb);
- dev_vdbg(hsotg->dev, " Device address: %d\n",
- usb_pipedevice(urb->pipe));
- dev_vdbg(hsotg->dev, " Endpoint: %d, %s\n",
- usb_pipeendpoint(urb->pipe),
- usb_pipein(urb->pipe) ? "IN" : "OUT");
-
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_CONTROL:
- pipetype = "CONTROL";
- break;
- case PIPE_BULK:
- pipetype = "BULK";
- break;
- case PIPE_INTERRUPT:
- pipetype = "INTERRUPT";
- break;
- case PIPE_ISOCHRONOUS:
- pipetype = "ISOCHRONOUS";
- break;
- default:
- pipetype = "UNKNOWN";
- break;
- }
-
- dev_vdbg(hsotg->dev, " Endpoint type: %s %s (%s)\n", pipetype,
- usb_urb_dir_in(urb) ? "IN" : "OUT", usb_pipein(urb->pipe) ?
- "IN" : "OUT");
-
- switch (urb->dev->speed) {
- case USB_SPEED_HIGH:
- speed = "HIGH";
- break;
- case USB_SPEED_FULL:
- speed = "FULL";
- break;
- case USB_SPEED_LOW:
- speed = "LOW";
- break;
- default:
- speed = "UNKNOWN";
- break;
- }
-
- dev_vdbg(hsotg->dev, " Speed: %s\n", speed);
- dev_vdbg(hsotg->dev, " Max packet size: %d\n",
- usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)));
- dev_vdbg(hsotg->dev, " Data buffer length: %d\n",
- urb->transfer_buffer_length);
- dev_vdbg(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n",
- urb->transfer_buffer, (unsigned long)urb->transfer_dma);
- dev_vdbg(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n",
- urb->setup_packet, (unsigned long)urb->setup_dma);
- dev_vdbg(hsotg->dev, " Interval: %d\n", urb->interval);
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
- int i;
-
- for (i = 0; i < urb->number_of_packets; i++) {
- dev_vdbg(hsotg->dev, " ISO Desc %d:\n", i);
- dev_vdbg(hsotg->dev, " offset: %d, length %d\n",
- urb->iso_frame_desc[i].offset,
- urb->iso_frame_desc[i].length);
- }
- }
-#endif
-}
-
-/*
- * Starts processing a USB transfer request specified by a USB Request Block
- * (URB). mem_flags indicates the type of memory allocation to use while
- * processing this URB.
- */
-static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
- gfp_t mem_flags)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
- struct usb_host_endpoint *ep = urb->ep;
- struct dwc2_hcd_urb *dwc2_urb;
- int i;
- int retval;
- int alloc_bandwidth = 0;
- u8 ep_type = 0;
- u32 tflags = 0;
- void *buf;
- unsigned long flags;
-
- if (dbg_urb(urb)) {
- dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n");
- dwc2_dump_urb_info(hcd, urb, "urb_enqueue");
- }
-
- if (ep == NULL)
- return -EINVAL;
-
- if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
- usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
- spin_lock_irqsave(&hsotg->lock, flags);
- if (!dwc2_hcd_is_bandwidth_allocated(hsotg, ep))
- alloc_bandwidth = 1;
- spin_unlock_irqrestore(&hsotg->lock, flags);
- }
-
- switch (usb_pipetype(urb->pipe)) {
- case PIPE_CONTROL:
- ep_type = USB_ENDPOINT_XFER_CONTROL;
- break;
- case PIPE_ISOCHRONOUS:
- ep_type = USB_ENDPOINT_XFER_ISOC;
- break;
- case PIPE_BULK:
- ep_type = USB_ENDPOINT_XFER_BULK;
- break;
- case PIPE_INTERRUPT:
- ep_type = USB_ENDPOINT_XFER_INT;
- break;
- default:
- dev_warn(hsotg->dev, "Wrong ep type\n");
- }
-
- dwc2_urb = dwc2_hcd_urb_alloc(hsotg, urb->number_of_packets,
- mem_flags);
- if (!dwc2_urb)
- return -ENOMEM;
-
- dwc2_hcd_urb_set_pipeinfo(hsotg, dwc2_urb, usb_pipedevice(urb->pipe),
- usb_pipeendpoint(urb->pipe), ep_type,
- usb_pipein(urb->pipe),
- usb_maxpacket(urb->dev, urb->pipe,
- !(usb_pipein(urb->pipe))));
-
- buf = urb->transfer_buffer;
-
- if (hcd->self.uses_dma) {
- if (!buf && (urb->transfer_dma & 3)) {
- dev_err(hsotg->dev,
- "%s: unaligned transfer with no transfer_buffer",
- __func__);
- retval = -EINVAL;
- goto fail1;
- }
- }
-
- if (!(urb->transfer_flags & URB_NO_INTERRUPT))
- tflags |= URB_GIVEBACK_ASAP;
- if (urb->transfer_flags & URB_ZERO_PACKET)
- tflags |= URB_SEND_ZERO_PACKET;
-
- dwc2_urb->priv = urb;
- dwc2_urb->buf = buf;
- dwc2_urb->dma = urb->transfer_dma;
- dwc2_urb->length = urb->transfer_buffer_length;
- dwc2_urb->setup_packet = urb->setup_packet;
- dwc2_urb->setup_dma = urb->setup_dma;
- dwc2_urb->flags = tflags;
- dwc2_urb->interval = urb->interval;
- dwc2_urb->status = -EINPROGRESS;
-
- for (i = 0; i < urb->number_of_packets; ++i)
- dwc2_hcd_urb_set_iso_desc_params(dwc2_urb, i,
- urb->iso_frame_desc[i].offset,
- urb->iso_frame_desc[i].length);
-
- urb->hcpriv = dwc2_urb;
-
- spin_lock_irqsave(&hsotg->lock, flags);
- retval = usb_hcd_link_urb_to_ep(hcd, urb);
- spin_unlock_irqrestore(&hsotg->lock, flags);
- if (retval)
- goto fail1;
-
- retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, &ep->hcpriv, mem_flags);
- if (retval)
- goto fail2;
-
- if (alloc_bandwidth) {
- spin_lock_irqsave(&hsotg->lock, flags);
- dwc2_allocate_bus_bandwidth(hcd,
- dwc2_hcd_get_ep_bandwidth(hsotg, ep),
- urb);
- spin_unlock_irqrestore(&hsotg->lock, flags);
- }
-
- return 0;
-
-fail2:
- spin_lock_irqsave(&hsotg->lock, flags);
- dwc2_urb->priv = NULL;
- usb_hcd_unlink_urb_from_ep(hcd, urb);
- spin_unlock_irqrestore(&hsotg->lock, flags);
-fail1:
- urb->hcpriv = NULL;
- kfree(dwc2_urb);
-
- return retval;
-}
-
-/*
- * Aborts/cancels a USB transfer request. Always returns 0 to indicate success.
- */
-static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
- int status)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
- int rc;
- unsigned long flags;
-
- dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n");
- dwc2_dump_urb_info(hcd, urb, "urb_dequeue");
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- rc = usb_hcd_check_unlink_urb(hcd, urb, status);
- if (rc)
- goto out;
-
- if (!urb->hcpriv) {
- dev_dbg(hsotg->dev, "## urb->hcpriv is NULL ##\n");
- goto out;
- }
-
- rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv);
-
- usb_hcd_unlink_urb_from_ep(hcd, urb);
-
- kfree(urb->hcpriv);
- urb->hcpriv = NULL;
-
- /* Higher layer software sets URB status */
- spin_unlock(&hsotg->lock);
- usb_hcd_giveback_urb(hcd, urb, status);
- spin_lock(&hsotg->lock);
-
- dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n");
- dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status);
-out:
- spin_unlock_irqrestore(&hsotg->lock, flags);
-
- return rc;
-}
-
-/*
- * Frees resources in the DWC_otg controller related to a given endpoint. Also
- * clears state in the HCD related to the endpoint. Any URBs for the endpoint
- * must already be dequeued.
- */
-static void _dwc2_hcd_endpoint_disable(struct usb_hcd *hcd,
- struct usb_host_endpoint *ep)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
-
- dev_dbg(hsotg->dev,
- "DWC OTG HCD EP DISABLE: bEndpointAddress=0x%02x, ep->hcpriv=%p\n",
- ep->desc.bEndpointAddress, ep->hcpriv);
- dwc2_hcd_endpoint_disable(hsotg, ep, 250);
-}
-
-/*
- * Resets endpoint specific parameter values, in current version used to reset
- * the data toggle (as a WA). This function can be called from usb_clear_halt
- * routine.
- */
-static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd,
- struct usb_host_endpoint *ep)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
- int is_control = usb_endpoint_xfer_control(&ep->desc);
- int is_out = usb_endpoint_dir_out(&ep->desc);
- int epnum = usb_endpoint_num(&ep->desc);
- struct usb_device *udev;
- unsigned long flags;
-
- dev_dbg(hsotg->dev,
- "DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n",
- ep->desc.bEndpointAddress);
-
- udev = to_usb_device(hsotg->dev);
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- usb_settoggle(udev, epnum, is_out, 0);
- if (is_control)
- usb_settoggle(udev, epnum, !is_out, 0);
- dwc2_hcd_endpoint_reset(hsotg, ep);
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
-}
-
-/*
- * Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if
- * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid
- * interrupt.
- *
- * This function is called by the USB core when an interrupt occurs
- */
-static irqreturn_t _dwc2_hcd_irq(struct usb_hcd *hcd)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
-
- return dwc2_handle_hcd_intr(hsotg);
-}
-
-/*
- * Creates Status Change bitmap for the root hub and root port. The bitmap is
- * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1
- * is the status change indicator for the single root port. Returns 1 if either
- * change indicator is 1, otherwise returns 0.
- */
-static int _dwc2_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
-
- buf[0] = dwc2_hcd_is_status_changed(hsotg, 1) << 1;
- return buf[0] != 0;
-}
-
-/* Handles hub class-specific requests */
-static int _dwc2_hcd_hub_control(struct usb_hcd *hcd, u16 typereq, u16 wvalue,
- u16 windex, char *buf, u16 wlength)
-{
- int retval = dwc2_hcd_hub_control(dwc2_hcd_to_hsotg(hcd), typereq,
- wvalue, windex, buf, wlength);
- return retval;
-}
-
-/* Handles hub TT buffer clear completions */
-static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd,
- struct usb_host_endpoint *ep)
-{
- struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
- struct dwc2_qh *qh;
- unsigned long flags;
-
- qh = ep->hcpriv;
- if (!qh)
- return;
-
- spin_lock_irqsave(&hsotg->lock, flags);
- qh->tt_buffer_dirty = 0;
-
- if (hsotg->flags.b.port_connect_status)
- dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_ALL);
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
-}
-
-static struct hc_driver dwc2_hc_driver = {
- .description = "dwc2_hsotg",
- .product_desc = "DWC OTG Controller",
- .hcd_priv_size = sizeof(struct wrapper_priv_data),
-
- .irq = _dwc2_hcd_irq,
- .flags = HCD_MEMORY | HCD_USB2,
-
- .start = _dwc2_hcd_start,
- .stop = _dwc2_hcd_stop,
- .urb_enqueue = _dwc2_hcd_urb_enqueue,
- .urb_dequeue = _dwc2_hcd_urb_dequeue,
- .endpoint_disable = _dwc2_hcd_endpoint_disable,
- .endpoint_reset = _dwc2_hcd_endpoint_reset,
- .get_frame_number = _dwc2_hcd_get_frame_number,
-
- .hub_status_data = _dwc2_hcd_hub_status_data,
- .hub_control = _dwc2_hcd_hub_control,
- .clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete,
-};
-
-/*
- * Frees secondary storage associated with the dwc2_hsotg structure contained
- * in the struct usb_hcd field
- */
-static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
-{
- u32 ahbcfg;
- u32 dctl;
- int i;
-
- dev_dbg(hsotg->dev, "DWC OTG HCD FREE\n");
-
- /* Free memory for QH/QTD lists */
- dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_inactive);
- dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_active);
- dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_inactive);
- dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_ready);
- dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_assigned);
- dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_queued);
-
- /* Free memory for the host channels */
- for (i = 0; i < MAX_EPS_CHANNELS; i++) {
- struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
-
- if (chan != NULL) {
- dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n",
- i, chan);
- hsotg->hc_ptr_array[i] = NULL;
- kfree(chan);
- }
- }
-
- if (hsotg->core_params->dma_enable > 0) {
- if (hsotg->status_buf) {
- dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE,
- hsotg->status_buf,
- hsotg->status_buf_dma);
- hsotg->status_buf = NULL;
- }
- } else {
- kfree(hsotg->status_buf);
- hsotg->status_buf = NULL;
- }
-
- ahbcfg = readl(hsotg->regs + GAHBCFG);
-
- /* Disable all interrupts */
- ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
- writel(ahbcfg, hsotg->regs + GAHBCFG);
- writel(0, hsotg->regs + GINTMSK);
-
- if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a) {
- dctl = readl(hsotg->regs + DCTL);
- dctl |= DCTL_SFTDISCON;
- writel(dctl, hsotg->regs + DCTL);
- }
-
- if (hsotg->wq_otg) {
- if (!cancel_work_sync(&hsotg->wf_otg))
- flush_workqueue(hsotg->wq_otg);
- destroy_workqueue(hsotg->wq_otg);
- }
-
- kfree(hsotg->core_params);
- hsotg->core_params = NULL;
- del_timer(&hsotg->wkp_timer);
-}
-
-static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
-{
- /* Turn off all host-specific interrupts */
- dwc2_disable_host_interrupts(hsotg);
-
- dwc2_hcd_free(hsotg);
-}
-
-/*
- * Sets all parameters to the given value.
- *
- * Assumes that the dwc2_core_params struct contains only integers.
- */
-void dwc2_set_all_params(struct dwc2_core_params *params, int value)
-{
- int *p = (int *)params;
- size_t size = sizeof(*params) / sizeof(*p);
- int i;
-
- for (i = 0; i < size; i++)
- p[i] = value;
-}
-EXPORT_SYMBOL_GPL(dwc2_set_all_params);
-
-/*
- * Initializes the HCD. This function allocates memory for and initializes the
- * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the
- * USB bus with the core and calls the hc_driver->start() function. It returns
- * a negative error on failure.
- */
-int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
- const struct dwc2_core_params *params)
-{
- struct usb_hcd *hcd;
- struct dwc2_host_chan *channel;
- u32 hcfg;
- int i, num_channels;
- int retval;
-
- dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n");
-
- /* Detect config values from hardware */
- retval = dwc2_get_hwparams(hsotg);
-
- if (retval)
- return retval;
-
- retval = -ENOMEM;
-
- hcfg = readl(hsotg->regs + HCFG);
- dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg);
-
-#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
- hsotg->frame_num_array = kzalloc(sizeof(*hsotg->frame_num_array) *
- FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
- if (!hsotg->frame_num_array)
- goto error1;
- hsotg->last_frame_num_array = kzalloc(
- sizeof(*hsotg->last_frame_num_array) *
- FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
- if (!hsotg->last_frame_num_array)
- goto error1;
- hsotg->last_frame_num = HFNUM_MAX_FRNUM;
-#endif
-
- hsotg->core_params = kzalloc(sizeof(*hsotg->core_params), GFP_KERNEL);
- if (!hsotg->core_params)
- goto error1;
-
- dwc2_set_all_params(hsotg->core_params, -1);
-
- /* Validate parameter values */
- dwc2_set_parameters(hsotg, params);
-
- /* Check if the bus driver or platform code has setup a dma_mask */
- if (hsotg->core_params->dma_enable > 0 &&
- hsotg->dev->dma_mask == NULL) {
- dev_warn(hsotg->dev,
- "dma_mask not set, disabling DMA\n");
- hsotg->core_params->dma_enable = 0;
- hsotg->core_params->dma_desc_enable = 0;
- }
-
- /* Set device flags indicating whether the HCD supports DMA */
- if (hsotg->core_params->dma_enable > 0) {
- if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
- dev_warn(hsotg->dev, "can't set DMA mask\n");
- if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
- dev_warn(hsotg->dev, "can't set coherent DMA mask\n");
- }
-
- hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev));
- if (!hcd)
- goto error1;
-
- if (hsotg->core_params->dma_enable <= 0)
- hcd->self.uses_dma = 0;
-
- hcd->has_tt = 1;
-
- spin_lock_init(&hsotg->lock);
- ((struct wrapper_priv_data *) &hcd->hcd_priv)->hsotg = hsotg;
- hsotg->priv = hcd;
-
- /*
- * Disable the global interrupt until all the interrupt handlers are
- * installed
- */
- dwc2_disable_global_interrupts(hsotg);
-
- /* Initialize the DWC_otg core, and select the Phy type */
- retval = dwc2_core_init(hsotg, true, irq);
- if (retval)
- goto error2;
-
- /* Create new workqueue and init work */
- retval = -ENOMEM;
- hsotg->wq_otg = create_singlethread_workqueue("dwc2");
- if (!hsotg->wq_otg) {
- dev_err(hsotg->dev, "Failed to create workqueue\n");
- goto error2;
- }
- INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change);
-
- setup_timer(&hsotg->wkp_timer, dwc2_wakeup_detected,
- (unsigned long)hsotg);
-
- /* Initialize the non-periodic schedule */
- INIT_LIST_HEAD(&hsotg->non_periodic_sched_inactive);
- INIT_LIST_HEAD(&hsotg->non_periodic_sched_active);
-
- /* Initialize the periodic schedule */
- INIT_LIST_HEAD(&hsotg->periodic_sched_inactive);
- INIT_LIST_HEAD(&hsotg->periodic_sched_ready);
- INIT_LIST_HEAD(&hsotg->periodic_sched_assigned);
- INIT_LIST_HEAD(&hsotg->periodic_sched_queued);
-
- /*
- * Create a host channel descriptor for each host channel implemented
- * in the controller. Initialize the channel descriptor array.
- */
- INIT_LIST_HEAD(&hsotg->free_hc_list);
- num_channels = hsotg->core_params->host_channels;
- memset(&hsotg->hc_ptr_array[0], 0, sizeof(hsotg->hc_ptr_array));
-
- for (i = 0; i < num_channels; i++) {
- channel = kzalloc(sizeof(*channel), GFP_KERNEL);
- if (channel == NULL)
- goto error3;
- channel->hc_num = i;
- hsotg->hc_ptr_array[i] = channel;
- }
-
- if (hsotg->core_params->uframe_sched > 0)
- dwc2_hcd_init_usecs(hsotg);
-
- /* Initialize hsotg start work */
- INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func);
-
- /* Initialize port reset work */
- INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func);
-
- /*
- * Allocate space for storing data on status transactions. Normally no
- * data is sent, but this space acts as a bit bucket. This must be
- * done after usb_add_hcd since that function allocates the DMA buffer
- * pool.
- */
- if (hsotg->core_params->dma_enable > 0)
- hsotg->status_buf = dma_alloc_coherent(hsotg->dev,
- DWC2_HCD_STATUS_BUF_SIZE,
- &hsotg->status_buf_dma, GFP_KERNEL);
- else
- hsotg->status_buf = kzalloc(DWC2_HCD_STATUS_BUF_SIZE,
- GFP_KERNEL);
-
- if (!hsotg->status_buf)
- goto error3;
-
- hsotg->otg_port = 1;
- hsotg->frame_list = NULL;
- hsotg->frame_list_dma = 0;
- hsotg->periodic_qh_count = 0;
-
- /* Initiate lx_state to L3 disconnected state */
- hsotg->lx_state = DWC2_L3;
-
- hcd->self.otg_port = hsotg->otg_port;
-
- /* Don't support SG list at this point */
- hcd->self.sg_tablesize = 0;
-
- /*
- * Finish generic HCD initialization and start the HCD. This function
- * allocates the DMA buffer pool, registers the USB bus, requests the
- * IRQ line, and calls hcd_start method.
- */
- retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
- if (retval < 0)
- goto error3;
-
- dwc2_hcd_dump_state(hsotg);
-
- dwc2_enable_global_interrupts(hsotg);
-
- return 0;
-
-error3:
- dwc2_hcd_release(hsotg);
-error2:
- usb_put_hcd(hcd);
-error1:
- kfree(hsotg->core_params);
-
-#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
- kfree(hsotg->last_frame_num_array);
- kfree(hsotg->frame_num_array);
-#endif
-
- dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval);
- return retval;
-}
-EXPORT_SYMBOL_GPL(dwc2_hcd_init);
-
-/*
- * Removes the HCD.
- * Frees memory and resources associated with the HCD and deregisters the bus.
- */
-void dwc2_hcd_remove(struct dwc2_hsotg *hsotg)
-{
- struct usb_hcd *hcd;
-
- dev_dbg(hsotg->dev, "DWC OTG HCD REMOVE\n");
-
- hcd = dwc2_hsotg_to_hcd(hsotg);
- dev_dbg(hsotg->dev, "hsotg->hcd = %p\n", hcd);
-
- if (!hcd) {
- dev_dbg(hsotg->dev, "%s: dwc2_hsotg_to_hcd(hsotg) NULL!\n",
- __func__);
- return;
- }
-
- usb_remove_hcd(hcd);
- hsotg->priv = NULL;
- dwc2_hcd_release(hsotg);
- usb_put_hcd(hcd);
-
-#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
- kfree(hsotg->last_frame_num_array);
- kfree(hsotg->frame_num_array);
-#endif
-}
-EXPORT_SYMBOL_GPL(dwc2_hcd_remove);
+++ /dev/null
-/*
- * hcd.h - DesignWare HS OTG Controller host-mode declarations
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-#ifndef __DWC2_HCD_H__
-#define __DWC2_HCD_H__
-
-/*
- * This file contains the structures, constants, and interfaces for the
- * Host Contoller Driver (HCD)
- *
- * The Host Controller Driver (HCD) is responsible for translating requests
- * from the USB Driver into the appropriate actions on the DWC_otg controller.
- * It isolates the USBD from the specifics of the controller by providing an
- * API to the USBD.
- */
-
-struct dwc2_qh;
-
-/**
- * struct dwc2_host_chan - Software host channel descriptor
- *
- * @hc_num: Host channel number, used for register address lookup
- * @dev_addr: Address of the device
- * @ep_num: Endpoint of the device
- * @ep_is_in: Endpoint direction
- * @speed: Device speed. One of the following values:
- * - USB_SPEED_LOW
- * - USB_SPEED_FULL
- * - USB_SPEED_HIGH
- * @ep_type: Endpoint type. One of the following values:
- * - USB_ENDPOINT_XFER_CONTROL: 0
- * - USB_ENDPOINT_XFER_ISOC: 1
- * - USB_ENDPOINT_XFER_BULK: 2
- * - USB_ENDPOINT_XFER_INTR: 3
- * @max_packet: Max packet size in bytes
- * @data_pid_start: PID for initial transaction.
- * 0: DATA0
- * 1: DATA2
- * 2: DATA1
- * 3: MDATA (non-Control EP),
- * SETUP (Control EP)
- * @multi_count: Number of additional periodic transactions per
- * (micro)frame
- * @xfer_buf: Pointer to current transfer buffer position
- * @xfer_dma: DMA address of xfer_buf
- * @align_buf: In Buffer DMA mode this will be used if xfer_buf is not
- * DWORD aligned
- * @xfer_len: Total number of bytes to transfer
- * @xfer_count: Number of bytes transferred so far
- * @start_pkt_count: Packet count at start of transfer
- * @xfer_started: True if the transfer has been started
- * @ping: True if a PING request should be issued on this channel
- * @error_state: True if the error count for this transaction is non-zero
- * @halt_on_queue: True if this channel should be halted the next time a
- * request is queued for the channel. This is necessary in
- * slave mode if no request queue space is available when
- * an attempt is made to halt the channel.
- * @halt_pending: True if the host channel has been halted, but the core
- * is not finished flushing queued requests
- * @do_split: Enable split for the channel
- * @complete_split: Enable complete split
- * @hub_addr: Address of high speed hub for the split
- * @hub_port: Port of the low/full speed device for the split
- * @xact_pos: Split transaction position. One of the following values:
- * - DWC2_HCSPLT_XACTPOS_MID
- * - DWC2_HCSPLT_XACTPOS_BEGIN
- * - DWC2_HCSPLT_XACTPOS_END
- * - DWC2_HCSPLT_XACTPOS_ALL
- * @requests: Number of requests issued for this channel since it was
- * assigned to the current transfer (not counting PINGs)
- * @schinfo: Scheduling micro-frame bitmap
- * @ntd: Number of transfer descriptors for the transfer
- * @halt_status: Reason for halting the host channel
- * @hcint Contents of the HCINT register when the interrupt came
- * @qh: QH for the transfer being processed by this channel
- * @hc_list_entry: For linking to list of host channels
- * @desc_list_addr: Current QH's descriptor list DMA address
- *
- * This structure represents the state of a single host channel when acting in
- * host mode. It contains the data items needed to transfer packets to an
- * endpoint via a host channel.
- */
-struct dwc2_host_chan {
- u8 hc_num;
-
- unsigned dev_addr:7;
- unsigned ep_num:4;
- unsigned ep_is_in:1;
- unsigned speed:4;
- unsigned ep_type:2;
- unsigned max_packet:11;
- unsigned data_pid_start:2;
-#define DWC2_HC_PID_DATA0 TSIZ_SC_MC_PID_DATA0
-#define DWC2_HC_PID_DATA2 TSIZ_SC_MC_PID_DATA2
-#define DWC2_HC_PID_DATA1 TSIZ_SC_MC_PID_DATA1
-#define DWC2_HC_PID_MDATA TSIZ_SC_MC_PID_MDATA
-#define DWC2_HC_PID_SETUP TSIZ_SC_MC_PID_SETUP
-
- unsigned multi_count:2;
-
- u8 *xfer_buf;
- dma_addr_t xfer_dma;
- dma_addr_t align_buf;
- u32 xfer_len;
- u32 xfer_count;
- u16 start_pkt_count;
- u8 xfer_started;
- u8 do_ping;
- u8 error_state;
- u8 halt_on_queue;
- u8 halt_pending;
- u8 do_split;
- u8 complete_split;
- u8 hub_addr;
- u8 hub_port;
- u8 xact_pos;
-#define DWC2_HCSPLT_XACTPOS_MID HCSPLT_XACTPOS_MID
-#define DWC2_HCSPLT_XACTPOS_END HCSPLT_XACTPOS_END
-#define DWC2_HCSPLT_XACTPOS_BEGIN HCSPLT_XACTPOS_BEGIN
-#define DWC2_HCSPLT_XACTPOS_ALL HCSPLT_XACTPOS_ALL
-
- u8 requests;
- u8 schinfo;
- u16 ntd;
- enum dwc2_halt_status halt_status;
- u32 hcint;
- struct dwc2_qh *qh;
- struct list_head hc_list_entry;
- dma_addr_t desc_list_addr;
-};
-
-struct dwc2_hcd_pipe_info {
- u8 dev_addr;
- u8 ep_num;
- u8 pipe_type;
- u8 pipe_dir;
- u16 mps;
-};
-
-struct dwc2_hcd_iso_packet_desc {
- u32 offset;
- u32 length;
- u32 actual_length;
- u32 status;
-};
-
-struct dwc2_qtd;
-
-struct dwc2_hcd_urb {
- void *priv;
- struct dwc2_qtd *qtd;
- void *buf;
- dma_addr_t dma;
- void *setup_packet;
- dma_addr_t setup_dma;
- u32 length;
- u32 actual_length;
- u32 status;
- u32 error_count;
- u32 packet_count;
- u32 flags;
- u16 interval;
- struct dwc2_hcd_pipe_info pipe_info;
- struct dwc2_hcd_iso_packet_desc iso_descs[0];
-};
-
-/* Phases for control transfers */
-enum dwc2_control_phase {
- DWC2_CONTROL_SETUP,
- DWC2_CONTROL_DATA,
- DWC2_CONTROL_STATUS,
-};
-
-/* Transaction types */
-enum dwc2_transaction_type {
- DWC2_TRANSACTION_NONE,
- DWC2_TRANSACTION_PERIODIC,
- DWC2_TRANSACTION_NON_PERIODIC,
- DWC2_TRANSACTION_ALL,
-};
-
-/**
- * struct dwc2_qh - Software queue head structure
- *
- * @ep_type: Endpoint type. One of the following values:
- * - USB_ENDPOINT_XFER_CONTROL
- * - USB_ENDPOINT_XFER_BULK
- * - USB_ENDPOINT_XFER_INT
- * - USB_ENDPOINT_XFER_ISOC
- * @ep_is_in: Endpoint direction
- * @maxp: Value from wMaxPacketSize field of Endpoint Descriptor
- * @dev_speed: Device speed. One of the following values:
- * - USB_SPEED_LOW
- * - USB_SPEED_FULL
- * - USB_SPEED_HIGH
- * @data_toggle: Determines the PID of the next data packet for
- * non-controltransfers. Ignored for control transfers.
- * One of the following values:
- * - DWC2_HC_PID_DATA0
- * - DWC2_HC_PID_DATA1
- * @ping_state: Ping state
- * @do_split: Full/low speed endpoint on high-speed hub requires split
- * @td_first: Index of first activated isochronous transfer descriptor
- * @td_last: Index of last activated isochronous transfer descriptor
- * @usecs: Bandwidth in microseconds per (micro)frame
- * @interval: Interval between transfers in (micro)frames
- * @sched_frame: (Micro)frame to initialize a periodic transfer.
- * The transfer executes in the following (micro)frame.
- * @frame_usecs: Internal variable used by the microframe scheduler
- * @start_split_frame: (Micro)frame at which last start split was initialized
- * @ntd: Actual number of transfer descriptors in a list
- * @dw_align_buf: Used instead of original buffer if its physical address
- * is not dword-aligned
- * @dw_align_buf_dma: DMA address for align_buf
- * @qtd_list: List of QTDs for this QH
- * @channel: Host channel currently processing transfers for this QH
- * @qh_list_entry: Entry for QH in either the periodic or non-periodic
- * schedule
- * @desc_list: List of transfer descriptors
- * @desc_list_dma: Physical address of desc_list
- * @n_bytes: Xfer Bytes array. Each element corresponds to a transfer
- * descriptor and indicates original XferSize value for the
- * descriptor
- * @tt_buffer_dirty True if clear_tt_buffer_complete is pending
- *
- * A Queue Head (QH) holds the static characteristics of an endpoint and
- * maintains a list of transfers (QTDs) for that endpoint. A QH structure may
- * be entered in either the non-periodic or periodic schedule.
- */
-struct dwc2_qh {
- u8 ep_type;
- u8 ep_is_in;
- u16 maxp;
- u8 dev_speed;
- u8 data_toggle;
- u8 ping_state;
- u8 do_split;
- u8 td_first;
- u8 td_last;
- u16 usecs;
- u16 interval;
- u16 sched_frame;
- u16 frame_usecs[8];
- u16 start_split_frame;
- u16 ntd;
- u8 *dw_align_buf;
- dma_addr_t dw_align_buf_dma;
- struct list_head qtd_list;
- struct dwc2_host_chan *channel;
- struct list_head qh_list_entry;
- struct dwc2_hcd_dma_desc *desc_list;
- dma_addr_t desc_list_dma;
- u32 *n_bytes;
- unsigned tt_buffer_dirty:1;
-};
-
-/**
- * struct dwc2_qtd - Software queue transfer descriptor (QTD)
- *
- * @control_phase: Current phase for control transfers (Setup, Data, or
- * Status)
- * @in_process: Indicates if this QTD is currently processed by HW
- * @data_toggle: Determines the PID of the next data packet for the
- * data phase of control transfers. Ignored for other
- * transfer types. One of the following values:
- * - DWC2_HC_PID_DATA0
- * - DWC2_HC_PID_DATA1
- * @complete_split: Keeps track of the current split type for FS/LS
- * endpoints on a HS Hub
- * @isoc_split_pos: Position of the ISOC split in full/low speed
- * @isoc_frame_index: Index of the next frame descriptor for an isochronous
- * transfer. A frame descriptor describes the buffer
- * position and length of the data to be transferred in the
- * next scheduled (micro)frame of an isochronous transfer.
- * It also holds status for that transaction. The frame
- * index starts at 0.
- * @isoc_split_offset: Position of the ISOC split in the buffer for the
- * current frame
- * @ssplit_out_xfer_count: How many bytes transferred during SSPLIT OUT
- * @error_count: Holds the number of bus errors that have occurred for
- * a transaction within this transfer
- * @n_desc: Number of DMA descriptors for this QTD
- * @isoc_frame_index_last: Last activated frame (packet) index, used in
- * descriptor DMA mode only
- * @urb: URB for this transfer
- * @qh: Queue head for this QTD
- * @qtd_list_entry: For linking to the QH's list of QTDs
- *
- * A Queue Transfer Descriptor (QTD) holds the state of a bulk, control,
- * interrupt, or isochronous transfer. A single QTD is created for each URB
- * (of one of these types) submitted to the HCD. The transfer associated with
- * a QTD may require one or multiple transactions.
- *
- * A QTD is linked to a Queue Head, which is entered in either the
- * non-periodic or periodic schedule for execution. When a QTD is chosen for
- * execution, some or all of its transactions may be executed. After
- * execution, the state of the QTD is updated. The QTD may be retired if all
- * its transactions are complete or if an error occurred. Otherwise, it
- * remains in the schedule so more transactions can be executed later.
- */
-struct dwc2_qtd {
- enum dwc2_control_phase control_phase;
- u8 in_process;
- u8 data_toggle;
- u8 complete_split;
- u8 isoc_split_pos;
- u16 isoc_frame_index;
- u16 isoc_split_offset;
- u32 ssplit_out_xfer_count;
- u8 error_count;
- u8 n_desc;
- u16 isoc_frame_index_last;
- struct dwc2_hcd_urb *urb;
- struct dwc2_qh *qh;
- struct list_head qtd_list_entry;
-};
-
-#ifdef DEBUG
-struct hc_xfer_info {
- struct dwc2_hsotg *hsotg;
- struct dwc2_host_chan *chan;
-};
-#endif
-
-/* Gets the struct usb_hcd that contains a struct dwc2_hsotg */
-static inline struct usb_hcd *dwc2_hsotg_to_hcd(struct dwc2_hsotg *hsotg)
-{
- return (struct usb_hcd *)hsotg->priv;
-}
-
-/*
- * Inline used to disable one channel interrupt. Channel interrupts are
- * disabled when the channel is halted or released by the interrupt handler.
- * There is no need to handle further interrupts of that type until the
- * channel is re-assigned. In fact, subsequent handling may cause crashes
- * because the channel structures are cleaned up when the channel is released.
- */
-static inline void disable_hc_int(struct dwc2_hsotg *hsotg, int chnum, u32 intr)
-{
- u32 mask = readl(hsotg->regs + HCINTMSK(chnum));
-
- mask &= ~intr;
- writel(mask, hsotg->regs + HCINTMSK(chnum));
-}
-
-/*
- * Returns the mode of operation, host or device
- */
-static inline int dwc2_is_host_mode(struct dwc2_hsotg *hsotg)
-{
- return (readl(hsotg->regs + GINTSTS) & GINTSTS_CURMODE_HOST) != 0;
-}
-static inline int dwc2_is_device_mode(struct dwc2_hsotg *hsotg)
-{
- return (readl(hsotg->regs + GINTSTS) & GINTSTS_CURMODE_HOST) == 0;
-}
-
-/*
- * Reads HPRT0 in preparation to modify. It keeps the WC bits 0 so that if they
- * are read as 1, they won't clear when written back.
- */
-static inline u32 dwc2_read_hprt0(struct dwc2_hsotg *hsotg)
-{
- u32 hprt0 = readl(hsotg->regs + HPRT0);
-
- hprt0 &= ~(HPRT0_ENA | HPRT0_CONNDET | HPRT0_ENACHG | HPRT0_OVRCURRCHG);
- return hprt0;
-}
-
-static inline u8 dwc2_hcd_get_ep_num(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->ep_num;
-}
-
-static inline u8 dwc2_hcd_get_pipe_type(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->pipe_type;
-}
-
-static inline u16 dwc2_hcd_get_mps(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->mps;
-}
-
-static inline u8 dwc2_hcd_get_dev_addr(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->dev_addr;
-}
-
-static inline u8 dwc2_hcd_is_pipe_isoc(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->pipe_type == USB_ENDPOINT_XFER_ISOC;
-}
-
-static inline u8 dwc2_hcd_is_pipe_int(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->pipe_type == USB_ENDPOINT_XFER_INT;
-}
-
-static inline u8 dwc2_hcd_is_pipe_bulk(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->pipe_type == USB_ENDPOINT_XFER_BULK;
-}
-
-static inline u8 dwc2_hcd_is_pipe_control(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->pipe_type == USB_ENDPOINT_XFER_CONTROL;
-}
-
-static inline u8 dwc2_hcd_is_pipe_in(struct dwc2_hcd_pipe_info *pipe)
-{
- return pipe->pipe_dir == USB_DIR_IN;
-}
-
-static inline u8 dwc2_hcd_is_pipe_out(struct dwc2_hcd_pipe_info *pipe)
-{
- return !dwc2_hcd_is_pipe_in(pipe);
-}
-
-extern int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
- const struct dwc2_core_params *params);
-extern void dwc2_hcd_remove(struct dwc2_hsotg *hsotg);
-extern void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
- const struct dwc2_core_params *params);
-extern void dwc2_set_all_params(struct dwc2_core_params *params, int value);
-extern int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
-
-/* Transaction Execution Functions */
-extern enum dwc2_transaction_type dwc2_hcd_select_transactions(
- struct dwc2_hsotg *hsotg);
-extern void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
- enum dwc2_transaction_type tr_type);
-
-/* Schedule Queue Functions */
-/* Implemented in hcd_queue.c */
-extern void dwc2_hcd_init_usecs(struct dwc2_hsotg *hsotg);
-extern void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
-extern int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
-extern void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
-extern void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- int sched_csplit);
-
-extern void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb);
-extern int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
- struct dwc2_qh **qh, gfp_t mem_flags);
-
-/* Unlinks and frees a QTD */
-static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg,
- struct dwc2_qtd *qtd,
- struct dwc2_qh *qh)
-{
- list_del(&qtd->qtd_list_entry);
- kfree(qtd);
-}
-
-/* Descriptor DMA support functions */
-extern void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh);
-extern void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- enum dwc2_halt_status halt_status);
-
-extern int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- gfp_t mem_flags);
-extern void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
-
-/* Check if QH is non-periodic */
-#define dwc2_qh_is_non_per(_qh_ptr_) \
- ((_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_BULK || \
- (_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_CONTROL)
-
-#ifdef CONFIG_USB_DWC2_DEBUG_PERIODIC
-static inline bool dbg_hc(struct dwc2_host_chan *hc) { return true; }
-static inline bool dbg_qh(struct dwc2_qh *qh) { return true; }
-static inline bool dbg_urb(struct urb *urb) { return true; }
-static inline bool dbg_perio(void) { return true; }
-#else /* !CONFIG_USB_DWC2_DEBUG_PERIODIC */
-static inline bool dbg_hc(struct dwc2_host_chan *hc)
-{
- return hc->ep_type == USB_ENDPOINT_XFER_BULK ||
- hc->ep_type == USB_ENDPOINT_XFER_CONTROL;
-}
-
-static inline bool dbg_qh(struct dwc2_qh *qh)
-{
- return qh->ep_type == USB_ENDPOINT_XFER_BULK ||
- qh->ep_type == USB_ENDPOINT_XFER_CONTROL;
-}
-
-static inline bool dbg_urb(struct urb *urb)
-{
- return usb_pipetype(urb->pipe) == PIPE_BULK ||
- usb_pipetype(urb->pipe) == PIPE_CONTROL;
-}
-
-static inline bool dbg_perio(void) { return false; }
-#endif
-
-/* High bandwidth multiplier as encoded in highspeed endpoint descriptors */
-#define dwc2_hb_mult(wmaxpacketsize) (1 + (((wmaxpacketsize) >> 11) & 0x03))
-
-/* Packet size for any kind of endpoint descriptor */
-#define dwc2_max_packet(wmaxpacketsize) ((wmaxpacketsize) & 0x07ff)
-
-/*
- * Returns true if frame1 is less than or equal to frame2. The comparison is
- * done modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the
- * frame number when the max frame number is reached.
- */
-static inline int dwc2_frame_num_le(u16 frame1, u16 frame2)
-{
- return ((frame2 - frame1) & HFNUM_MAX_FRNUM) <= (HFNUM_MAX_FRNUM >> 1);
-}
-
-/*
- * Returns true if frame1 is greater than frame2. The comparison is done
- * modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the frame
- * number when the max frame number is reached.
- */
-static inline int dwc2_frame_num_gt(u16 frame1, u16 frame2)
-{
- return (frame1 != frame2) &&
- ((frame1 - frame2) & HFNUM_MAX_FRNUM) < (HFNUM_MAX_FRNUM >> 1);
-}
-
-/*
- * Increments frame by the amount specified by inc. The addition is done
- * modulo HFNUM_MAX_FRNUM. Returns the incremented value.
- */
-static inline u16 dwc2_frame_num_inc(u16 frame, u16 inc)
-{
- return (frame + inc) & HFNUM_MAX_FRNUM;
-}
-
-static inline u16 dwc2_full_frame_num(u16 frame)
-{
- return (frame & HFNUM_MAX_FRNUM) >> 3;
-}
-
-static inline u16 dwc2_micro_frame_num(u16 frame)
-{
- return frame & 0x7;
-}
-
-/*
- * Returns the Core Interrupt Status register contents, ANDed with the Core
- * Interrupt Mask register contents
- */
-static inline u32 dwc2_read_core_intr(struct dwc2_hsotg *hsotg)
-{
- return readl(hsotg->regs + GINTSTS) & readl(hsotg->regs + GINTMSK);
-}
-
-static inline u32 dwc2_hcd_urb_get_status(struct dwc2_hcd_urb *dwc2_urb)
-{
- return dwc2_urb->status;
-}
-
-static inline u32 dwc2_hcd_urb_get_actual_length(
- struct dwc2_hcd_urb *dwc2_urb)
-{
- return dwc2_urb->actual_length;
-}
-
-static inline u32 dwc2_hcd_urb_get_error_count(struct dwc2_hcd_urb *dwc2_urb)
-{
- return dwc2_urb->error_count;
-}
-
-static inline void dwc2_hcd_urb_set_iso_desc_params(
- struct dwc2_hcd_urb *dwc2_urb, int desc_num, u32 offset,
- u32 length)
-{
- dwc2_urb->iso_descs[desc_num].offset = offset;
- dwc2_urb->iso_descs[desc_num].length = length;
-}
-
-static inline u32 dwc2_hcd_urb_get_iso_desc_status(
- struct dwc2_hcd_urb *dwc2_urb, int desc_num)
-{
- return dwc2_urb->iso_descs[desc_num].status;
-}
-
-static inline u32 dwc2_hcd_urb_get_iso_desc_actual_length(
- struct dwc2_hcd_urb *dwc2_urb, int desc_num)
-{
- return dwc2_urb->iso_descs[desc_num].actual_length;
-}
-
-static inline int dwc2_hcd_is_bandwidth_allocated(struct dwc2_hsotg *hsotg,
- struct usb_host_endpoint *ep)
-{
- struct dwc2_qh *qh = ep->hcpriv;
-
- if (qh && !list_empty(&qh->qh_list_entry))
- return 1;
-
- return 0;
-}
-
-static inline u16 dwc2_hcd_get_ep_bandwidth(struct dwc2_hsotg *hsotg,
- struct usb_host_endpoint *ep)
-{
- struct dwc2_qh *qh = ep->hcpriv;
-
- if (!qh) {
- WARN_ON(1);
- return 0;
- }
-
- return qh->usecs;
-}
-
-extern void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd);
-
-/* HCD Core API */
-
-/**
- * dwc2_handle_hcd_intr() - Called on every hardware interrupt
- *
- * @hsotg: The DWC2 HCD
- *
- * Returns IRQ_HANDLED if interrupt is handled
- * Return IRQ_NONE if interrupt is not handled
- */
-extern irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg);
-
-/**
- * dwc2_hcd_stop() - Halts the DWC_otg host mode operation
- *
- * @hsotg: The DWC2 HCD
- */
-extern void dwc2_hcd_stop(struct dwc2_hsotg *hsotg);
-
-extern void dwc2_hcd_start(struct dwc2_hsotg *hsotg);
-extern void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg);
-
-/**
- * dwc2_hcd_is_b_host() - Returns 1 if core currently is acting as B host,
- * and 0 otherwise
- *
- * @hsotg: The DWC2 HCD
- */
-extern int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg);
-
-/**
- * dwc2_hcd_get_frame_number() - Returns current frame number
- *
- * @hsotg: The DWC2 HCD
- */
-extern int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg);
-
-/**
- * dwc2_hcd_dump_state() - Dumps hsotg state
- *
- * @hsotg: The DWC2 HCD
- *
- * NOTE: This function will be removed once the peripheral controller code
- * is integrated and the driver is stable
- */
-extern void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg);
-
-/**
- * dwc2_hcd_dump_frrem() - Dumps the average frame remaining at SOF
- *
- * @hsotg: The DWC2 HCD
- *
- * This can be used to determine average interrupt latency. Frame remaining is
- * also shown for start transfer and two additional sample points.
- *
- * NOTE: This function will be removed once the peripheral controller code
- * is integrated and the driver is stable
- */
-extern void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg);
-
-/* URB interface */
-
-/* Transfer flags */
-#define URB_GIVEBACK_ASAP 0x1
-#define URB_SEND_ZERO_PACKET 0x2
-
-/* Host driver callbacks */
-
-extern void dwc2_host_start(struct dwc2_hsotg *hsotg);
-extern void dwc2_host_disconnect(struct dwc2_hsotg *hsotg);
-extern void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context,
- int *hub_addr, int *hub_port);
-extern int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context);
-extern void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
- int status);
-
-#ifdef DEBUG
-/*
- * Macro to sample the remaining PHY clocks left in the current frame. This
- * may be used during debugging to determine the average time it takes to
- * execute sections of code. There are two possible sample points, "a" and
- * "b", so the _letter_ argument must be one of these values.
- *
- * To dump the average sample times, read the "hcd_frrem" sysfs attribute. For
- * example, "cat /sys/devices/lm0/hcd_frrem".
- */
-#define dwc2_sample_frrem(_hcd_, _qh_, _letter_) \
-do { \
- struct hfnum_data _hfnum_; \
- struct dwc2_qtd *_qtd_; \
- \
- _qtd_ = list_entry((_qh_)->qtd_list.next, struct dwc2_qtd, \
- qtd_list_entry); \
- if (usb_pipeint(_qtd_->urb->pipe) && \
- (_qh_)->start_split_frame != 0 && !_qtd_->complete_split) { \
- _hfnum_.d32 = readl((_hcd_)->regs + HFNUM); \
- switch (_hfnum_.b.frnum & 0x7) { \
- case 7: \
- (_hcd_)->hfnum_7_samples_##_letter_++; \
- (_hcd_)->hfnum_7_frrem_accum_##_letter_ += \
- _hfnum_.b.frrem; \
- break; \
- case 0: \
- (_hcd_)->hfnum_0_samples_##_letter_++; \
- (_hcd_)->hfnum_0_frrem_accum_##_letter_ += \
- _hfnum_.b.frrem; \
- break; \
- default: \
- (_hcd_)->hfnum_other_samples_##_letter_++; \
- (_hcd_)->hfnum_other_frrem_accum_##_letter_ += \
- _hfnum_.b.frrem; \
- break; \
- } \
- } \
-} while (0)
-#else
-#define dwc2_sample_frrem(_hcd_, _qh_, _letter_) do {} while (0)
-#endif
-
-#endif /* __DWC2_HCD_H__ */
+++ /dev/null
-/*
- * hcd_ddma.c - DesignWare HS OTG Controller descriptor DMA routines
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * This file contains the Descriptor DMA implementation for Host mode
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-
-#include <linux/usb/hcd.h>
-#include <linux/usb/ch11.h>
-
-#include "core.h"
-#include "hcd.h"
-
-static u16 dwc2_frame_list_idx(u16 frame)
-{
- return frame & (FRLISTEN_64_SIZE - 1);
-}
-
-static u16 dwc2_desclist_idx_inc(u16 idx, u16 inc, u8 speed)
-{
- return (idx + inc) &
- ((speed == USB_SPEED_HIGH ? MAX_DMA_DESC_NUM_HS_ISOC :
- MAX_DMA_DESC_NUM_GENERIC) - 1);
-}
-
-static u16 dwc2_desclist_idx_dec(u16 idx, u16 inc, u8 speed)
-{
- return (idx - inc) &
- ((speed == USB_SPEED_HIGH ? MAX_DMA_DESC_NUM_HS_ISOC :
- MAX_DMA_DESC_NUM_GENERIC) - 1);
-}
-
-static u16 dwc2_max_desc_num(struct dwc2_qh *qh)
-{
- return (qh->ep_type == USB_ENDPOINT_XFER_ISOC &&
- qh->dev_speed == USB_SPEED_HIGH) ?
- MAX_DMA_DESC_NUM_HS_ISOC : MAX_DMA_DESC_NUM_GENERIC;
-}
-
-static u16 dwc2_frame_incr_val(struct dwc2_qh *qh)
-{
- return qh->dev_speed == USB_SPEED_HIGH ?
- (qh->interval + 8 - 1) / 8 : qh->interval;
-}
-
-static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- gfp_t flags)
-{
- qh->desc_list = dma_alloc_coherent(hsotg->dev,
- sizeof(struct dwc2_hcd_dma_desc) *
- dwc2_max_desc_num(qh), &qh->desc_list_dma,
- flags);
-
- if (!qh->desc_list)
- return -ENOMEM;
-
- memset(qh->desc_list, 0,
- sizeof(struct dwc2_hcd_dma_desc) * dwc2_max_desc_num(qh));
-
- qh->n_bytes = kzalloc(sizeof(u32) * dwc2_max_desc_num(qh), flags);
- if (!qh->n_bytes) {
- dma_free_coherent(hsotg->dev, sizeof(struct dwc2_hcd_dma_desc)
- * dwc2_max_desc_num(qh), qh->desc_list,
- qh->desc_list_dma);
- qh->desc_list = NULL;
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static void dwc2_desc_list_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- if (qh->desc_list) {
- dma_free_coherent(hsotg->dev, sizeof(struct dwc2_hcd_dma_desc)
- * dwc2_max_desc_num(qh), qh->desc_list,
- qh->desc_list_dma);
- qh->desc_list = NULL;
- }
-
- kfree(qh->n_bytes);
- qh->n_bytes = NULL;
-}
-
-static int dwc2_frame_list_alloc(struct dwc2_hsotg *hsotg, gfp_t mem_flags)
-{
- if (hsotg->frame_list)
- return 0;
-
- hsotg->frame_list = dma_alloc_coherent(hsotg->dev,
- 4 * FRLISTEN_64_SIZE,
- &hsotg->frame_list_dma,
- mem_flags);
- if (!hsotg->frame_list)
- return -ENOMEM;
-
- memset(hsotg->frame_list, 0, 4 * FRLISTEN_64_SIZE);
- return 0;
-}
-
-static void dwc2_frame_list_free(struct dwc2_hsotg *hsotg)
-{
- u32 *frame_list;
- dma_addr_t frame_list_dma;
- unsigned long flags;
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- if (!hsotg->frame_list) {
- spin_unlock_irqrestore(&hsotg->lock, flags);
- return;
- }
-
- frame_list = hsotg->frame_list;
- frame_list_dma = hsotg->frame_list_dma;
- hsotg->frame_list = NULL;
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
-
- dma_free_coherent(hsotg->dev, 4 * FRLISTEN_64_SIZE, frame_list,
- frame_list_dma);
-}
-
-static void dwc2_per_sched_enable(struct dwc2_hsotg *hsotg, u32 fr_list_en)
-{
- u32 hcfg;
- unsigned long flags;
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- hcfg = readl(hsotg->regs + HCFG);
- if (hcfg & HCFG_PERSCHEDENA) {
- /* already enabled */
- spin_unlock_irqrestore(&hsotg->lock, flags);
- return;
- }
-
- writel(hsotg->frame_list_dma, hsotg->regs + HFLBADDR);
-
- hcfg &= ~HCFG_FRLISTEN_MASK;
- hcfg |= fr_list_en | HCFG_PERSCHEDENA;
- dev_vdbg(hsotg->dev, "Enabling Periodic schedule\n");
- writel(hcfg, hsotg->regs + HCFG);
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
-}
-
-static void dwc2_per_sched_disable(struct dwc2_hsotg *hsotg)
-{
- u32 hcfg;
- unsigned long flags;
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- hcfg = readl(hsotg->regs + HCFG);
- if (!(hcfg & HCFG_PERSCHEDENA)) {
- /* already disabled */
- spin_unlock_irqrestore(&hsotg->lock, flags);
- return;
- }
-
- hcfg &= ~HCFG_PERSCHEDENA;
- dev_vdbg(hsotg->dev, "Disabling Periodic schedule\n");
- writel(hcfg, hsotg->regs + HCFG);
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
-}
-
-/*
- * Activates/Deactivates FrameList entries for the channel based on endpoint
- * servicing period
- */
-static void dwc2_update_frame_list(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- int enable)
-{
- struct dwc2_host_chan *chan;
- u16 i, j, inc;
-
- if (!hsotg) {
- pr_err("hsotg = %p\n", hsotg);
- return;
- }
-
- if (!qh->channel) {
- dev_err(hsotg->dev, "qh->channel = %p\n", qh->channel);
- return;
- }
-
- if (!hsotg->frame_list) {
- dev_err(hsotg->dev, "hsotg->frame_list = %p\n",
- hsotg->frame_list);
- return;
- }
-
- chan = qh->channel;
- inc = dwc2_frame_incr_val(qh);
- if (qh->ep_type == USB_ENDPOINT_XFER_ISOC)
- i = dwc2_frame_list_idx(qh->sched_frame);
- else
- i = 0;
-
- j = i;
- do {
- if (enable)
- hsotg->frame_list[j] |= 1 << chan->hc_num;
- else
- hsotg->frame_list[j] &= ~(1 << chan->hc_num);
- j = (j + inc) & (FRLISTEN_64_SIZE - 1);
- } while (j != i);
-
- if (!enable)
- return;
-
- chan->schinfo = 0;
- if (chan->speed == USB_SPEED_HIGH && qh->interval) {
- j = 1;
- /* TODO - check this */
- inc = (8 + qh->interval - 1) / qh->interval;
- for (i = 0; i < inc; i++) {
- chan->schinfo |= j;
- j = j << qh->interval;
- }
- } else {
- chan->schinfo = 0xff;
- }
-}
-
-static void dwc2_release_channel_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh)
-{
- struct dwc2_host_chan *chan = qh->channel;
-
- if (dwc2_qh_is_non_per(qh)) {
- if (hsotg->core_params->uframe_sched > 0)
- hsotg->available_host_channels++;
- else
- hsotg->non_periodic_channels--;
- } else {
- dwc2_update_frame_list(hsotg, qh, 0);
- }
-
- /*
- * The condition is added to prevent double cleanup try in case of
- * device disconnect. See channel cleanup in dwc2_hcd_disconnect().
- */
- if (chan->qh) {
- if (!list_empty(&chan->hc_list_entry))
- list_del(&chan->hc_list_entry);
- dwc2_hc_cleanup(hsotg, chan);
- list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
- chan->qh = NULL;
- }
-
- qh->channel = NULL;
- qh->ntd = 0;
-
- if (qh->desc_list)
- memset(qh->desc_list, 0, sizeof(struct dwc2_hcd_dma_desc) *
- dwc2_max_desc_num(qh));
-}
-
-/**
- * dwc2_hcd_qh_init_ddma() - Initializes a QH structure's Descriptor DMA
- * related members
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: The QH to init
- *
- * Return: 0 if successful, negative error code otherwise
- *
- * Allocates memory for the descriptor list. For the first periodic QH,
- * allocates memory for the FrameList and enables periodic scheduling.
- */
-int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- gfp_t mem_flags)
-{
- int retval;
-
- if (qh->do_split) {
- dev_err(hsotg->dev,
- "SPLIT Transfers are not supported in Descriptor DMA mode.\n");
- retval = -EINVAL;
- goto err0;
- }
-
- retval = dwc2_desc_list_alloc(hsotg, qh, mem_flags);
- if (retval)
- goto err0;
-
- if (qh->ep_type == USB_ENDPOINT_XFER_ISOC ||
- qh->ep_type == USB_ENDPOINT_XFER_INT) {
- if (!hsotg->frame_list) {
- retval = dwc2_frame_list_alloc(hsotg, mem_flags);
- if (retval)
- goto err1;
- /* Enable periodic schedule on first periodic QH */
- dwc2_per_sched_enable(hsotg, HCFG_FRLISTEN_64);
- }
- }
-
- qh->ntd = 0;
- return 0;
-
-err1:
- dwc2_desc_list_free(hsotg, qh);
-err0:
- return retval;
-}
-
-/**
- * dwc2_hcd_qh_free_ddma() - Frees a QH structure's Descriptor DMA related
- * members
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: The QH to free
- *
- * Frees descriptor list memory associated with the QH. If QH is periodic and
- * the last, frees FrameList memory and disables periodic scheduling.
- */
-void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- dwc2_desc_list_free(hsotg, qh);
-
- /*
- * Channel still assigned due to some reasons.
- * Seen on Isoc URB dequeue. Channel halted but no subsequent
- * ChHalted interrupt to release the channel. Afterwards
- * when it comes here from endpoint disable routine
- * channel remains assigned.
- */
- if (qh->channel)
- dwc2_release_channel_ddma(hsotg, qh);
-
- if ((qh->ep_type == USB_ENDPOINT_XFER_ISOC ||
- qh->ep_type == USB_ENDPOINT_XFER_INT) &&
- (hsotg->core_params->uframe_sched > 0 ||
- !hsotg->periodic_channels) && hsotg->frame_list) {
- dwc2_per_sched_disable(hsotg);
- dwc2_frame_list_free(hsotg);
- }
-}
-
-static u8 dwc2_frame_to_desc_idx(struct dwc2_qh *qh, u16 frame_idx)
-{
- if (qh->dev_speed == USB_SPEED_HIGH)
- /* Descriptor set (8 descriptors) index which is 8-aligned */
- return (frame_idx & ((MAX_DMA_DESC_NUM_HS_ISOC / 8) - 1)) * 8;
- else
- return frame_idx & (MAX_DMA_DESC_NUM_GENERIC - 1);
-}
-
-/*
- * Determine starting frame for Isochronous transfer.
- * Few frames skipped to prevent race condition with HC.
- */
-static u16 dwc2_calc_starting_frame(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh, u16 *skip_frames)
-{
- u16 frame;
-
- hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);
-
- /* sched_frame is always frame number (not uFrame) both in FS and HS! */
-
- /*
- * skip_frames is used to limit activated descriptors number
- * to avoid the situation when HC services the last activated
- * descriptor firstly.
- * Example for FS:
- * Current frame is 1, scheduled frame is 3. Since HC always fetches
- * the descriptor corresponding to curr_frame+1, the descriptor
- * corresponding to frame 2 will be fetched. If the number of
- * descriptors is max=64 (or greather) the list will be fully programmed
- * with Active descriptors and it is possible case (rare) that the
- * latest descriptor(considering rollback) corresponding to frame 2 will
- * be serviced first. HS case is more probable because, in fact, up to
- * 11 uframes (16 in the code) may be skipped.
- */
- if (qh->dev_speed == USB_SPEED_HIGH) {
- /*
- * Consider uframe counter also, to start xfer asap. If half of
- * the frame elapsed skip 2 frames otherwise just 1 frame.
- * Starting descriptor index must be 8-aligned, so if the
- * current frame is near to complete the next one is skipped as
- * well.
- */
- if (dwc2_micro_frame_num(hsotg->frame_number) >= 5) {
- *skip_frames = 2 * 8;
- frame = dwc2_frame_num_inc(hsotg->frame_number,
- *skip_frames);
- } else {
- *skip_frames = 1 * 8;
- frame = dwc2_frame_num_inc(hsotg->frame_number,
- *skip_frames);
- }
-
- frame = dwc2_full_frame_num(frame);
- } else {
- /*
- * Two frames are skipped for FS - the current and the next.
- * But for descriptor programming, 1 frame (descriptor) is
- * enough, see example above.
- */
- *skip_frames = 1;
- frame = dwc2_frame_num_inc(hsotg->frame_number, 2);
- }
-
- return frame;
-}
-
-/*
- * Calculate initial descriptor index for isochronous transfer based on
- * scheduled frame
- */
-static u16 dwc2_recalc_initial_desc_idx(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh)
-{
- u16 frame, fr_idx, fr_idx_tmp, skip_frames;
-
- /*
- * With current ISOC processing algorithm the channel is being released
- * when no more QTDs in the list (qh->ntd == 0). Thus this function is
- * called only when qh->ntd == 0 and qh->channel == 0.
- *
- * So qh->channel != NULL branch is not used and just not removed from
- * the source file. It is required for another possible approach which
- * is, do not disable and release the channel when ISOC session
- * completed, just move QH to inactive schedule until new QTD arrives.
- * On new QTD, the QH moved back to 'ready' schedule, starting frame and
- * therefore starting desc_index are recalculated. In this case channel
- * is released only on ep_disable.
- */
-
- /*
- * Calculate starting descriptor index. For INTERRUPT endpoint it is
- * always 0.
- */
- if (qh->channel) {
- frame = dwc2_calc_starting_frame(hsotg, qh, &skip_frames);
- /*
- * Calculate initial descriptor index based on FrameList current
- * bitmap and servicing period
- */
- fr_idx_tmp = dwc2_frame_list_idx(frame);
- fr_idx = (FRLISTEN_64_SIZE +
- dwc2_frame_list_idx(qh->sched_frame) - fr_idx_tmp)
- % dwc2_frame_incr_val(qh);
- fr_idx = (fr_idx + fr_idx_tmp) % FRLISTEN_64_SIZE;
- } else {
- qh->sched_frame = dwc2_calc_starting_frame(hsotg, qh,
- &skip_frames);
- fr_idx = dwc2_frame_list_idx(qh->sched_frame);
- }
-
- qh->td_first = qh->td_last = dwc2_frame_to_desc_idx(qh, fr_idx);
-
- return skip_frames;
-}
-
-#define ISOC_URB_GIVEBACK_ASAP
-
-#define MAX_ISOC_XFER_SIZE_FS 1023
-#define MAX_ISOC_XFER_SIZE_HS 3072
-#define DESCNUM_THRESHOLD 4
-
-static void dwc2_fill_host_isoc_dma_desc(struct dwc2_hsotg *hsotg,
- struct dwc2_qtd *qtd,
- struct dwc2_qh *qh, u32 max_xfer_size,
- u16 idx)
-{
- struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[idx];
- struct dwc2_hcd_iso_packet_desc *frame_desc;
-
- memset(dma_desc, 0, sizeof(*dma_desc));
- frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index_last];
-
- if (frame_desc->length > max_xfer_size)
- qh->n_bytes[idx] = max_xfer_size;
- else
- qh->n_bytes[idx] = frame_desc->length;
-
- dma_desc->buf = (u32)(qtd->urb->dma + frame_desc->offset);
- dma_desc->status = qh->n_bytes[idx] << HOST_DMA_ISOC_NBYTES_SHIFT &
- HOST_DMA_ISOC_NBYTES_MASK;
-
-#ifdef ISOC_URB_GIVEBACK_ASAP
- /* Set IOC for each descriptor corresponding to last frame of URB */
- if (qtd->isoc_frame_index_last == qtd->urb->packet_count)
- dma_desc->status |= HOST_DMA_IOC;
-#endif
-
- qh->ntd++;
- qtd->isoc_frame_index_last++;
-}
-
-static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh, u16 skip_frames)
-{
- struct dwc2_qtd *qtd;
- u32 max_xfer_size;
- u16 idx, inc, n_desc, ntd_max = 0;
-
- idx = qh->td_last;
- inc = qh->interval;
- n_desc = 0;
-
- if (qh->interval) {
- ntd_max = (dwc2_max_desc_num(qh) + qh->interval - 1) /
- qh->interval;
- if (skip_frames && !qh->channel)
- ntd_max -= skip_frames / qh->interval;
- }
-
- max_xfer_size = qh->dev_speed == USB_SPEED_HIGH ?
- MAX_ISOC_XFER_SIZE_HS : MAX_ISOC_XFER_SIZE_FS;
-
- list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry) {
- while (qh->ntd < ntd_max && qtd->isoc_frame_index_last <
- qtd->urb->packet_count) {
- if (n_desc > 1)
- qh->desc_list[n_desc - 1].status |= HOST_DMA_A;
- dwc2_fill_host_isoc_dma_desc(hsotg, qtd, qh,
- max_xfer_size, idx);
- idx = dwc2_desclist_idx_inc(idx, inc, qh->dev_speed);
- n_desc++;
- }
- qtd->in_process = 1;
- }
-
- qh->td_last = idx;
-
-#ifdef ISOC_URB_GIVEBACK_ASAP
- /* Set IOC for last descriptor if descriptor list is full */
- if (qh->ntd == ntd_max) {
- idx = dwc2_desclist_idx_dec(qh->td_last, inc, qh->dev_speed);
- qh->desc_list[idx].status |= HOST_DMA_IOC;
- }
-#else
- /*
- * Set IOC bit only for one descriptor. Always try to be ahead of HW
- * processing, i.e. on IOC generation driver activates next descriptor
- * but core continues to process descriptors following the one with IOC
- * set.
- */
-
- if (n_desc > DESCNUM_THRESHOLD)
- /*
- * Move IOC "up". Required even if there is only one QTD
- * in the list, because QTDs might continue to be queued,
- * but during the activation it was only one queued.
- * Actually more than one QTD might be in the list if this
- * function called from XferCompletion - QTDs was queued during
- * HW processing of the previous descriptor chunk.
- */
- idx = dwc2_desclist_idx_dec(idx, inc * ((qh->ntd + 1) / 2),
- qh->dev_speed);
- else
- /*
- * Set the IOC for the latest descriptor if either number of
- * descriptors is not greater than threshold or no more new
- * descriptors activated
- */
- idx = dwc2_desclist_idx_dec(qh->td_last, inc, qh->dev_speed);
-
- qh->desc_list[idx].status |= HOST_DMA_IOC;
-#endif
-
- if (n_desc) {
- qh->desc_list[n_desc - 1].status |= HOST_DMA_A;
- if (n_desc > 1)
- qh->desc_list[0].status |= HOST_DMA_A;
- }
-}
-
-static void dwc2_fill_host_dma_desc(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- struct dwc2_qtd *qtd, struct dwc2_qh *qh,
- int n_desc)
-{
- struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[n_desc];
- int len = chan->xfer_len;
-
- if (len > MAX_DMA_DESC_SIZE - (chan->max_packet - 1))
- len = MAX_DMA_DESC_SIZE - (chan->max_packet - 1);
-
- if (chan->ep_is_in) {
- int num_packets;
-
- if (len > 0 && chan->max_packet)
- num_packets = (len + chan->max_packet - 1)
- / chan->max_packet;
- else
- /* Need 1 packet for transfer length of 0 */
- num_packets = 1;
-
- /* Always program an integral # of packets for IN transfers */
- len = num_packets * chan->max_packet;
- }
-
- dma_desc->status = len << HOST_DMA_NBYTES_SHIFT & HOST_DMA_NBYTES_MASK;
- qh->n_bytes[n_desc] = len;
-
- if (qh->ep_type == USB_ENDPOINT_XFER_CONTROL &&
- qtd->control_phase == DWC2_CONTROL_SETUP)
- dma_desc->status |= HOST_DMA_SUP;
-
- dma_desc->buf = (u32)chan->xfer_dma;
-
- /*
- * Last (or only) descriptor of IN transfer with actual size less
- * than MaxPacket
- */
- if (len > chan->xfer_len) {
- chan->xfer_len = 0;
- } else {
- chan->xfer_dma += len;
- chan->xfer_len -= len;
- }
-}
-
-static void dwc2_init_non_isoc_dma_desc(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh)
-{
- struct dwc2_qtd *qtd;
- struct dwc2_host_chan *chan = qh->channel;
- int n_desc = 0;
-
- dev_vdbg(hsotg->dev, "%s(): qh=%p dma=%08lx len=%d\n", __func__, qh,
- (unsigned long)chan->xfer_dma, chan->xfer_len);
-
- /*
- * Start with chan->xfer_dma initialized in assign_and_init_hc(), then
- * if SG transfer consists of multiple URBs, this pointer is re-assigned
- * to the buffer of the currently processed QTD. For non-SG request
- * there is always one QTD active.
- */
-
- list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry) {
- dev_vdbg(hsotg->dev, "qtd=%p\n", qtd);
-
- if (n_desc) {
- /* SG request - more than 1 QTD */
- chan->xfer_dma = qtd->urb->dma +
- qtd->urb->actual_length;
- chan->xfer_len = qtd->urb->length -
- qtd->urb->actual_length;
- dev_vdbg(hsotg->dev, "buf=%08lx len=%d\n",
- (unsigned long)chan->xfer_dma, chan->xfer_len);
- }
-
- qtd->n_desc = 0;
- do {
- if (n_desc > 1) {
- qh->desc_list[n_desc - 1].status |= HOST_DMA_A;
- dev_vdbg(hsotg->dev,
- "set A bit in desc %d (%p)\n",
- n_desc - 1,
- &qh->desc_list[n_desc - 1]);
- }
- dwc2_fill_host_dma_desc(hsotg, chan, qtd, qh, n_desc);
- dev_vdbg(hsotg->dev,
- "desc %d (%p) buf=%08x status=%08x\n",
- n_desc, &qh->desc_list[n_desc],
- qh->desc_list[n_desc].buf,
- qh->desc_list[n_desc].status);
- qtd->n_desc++;
- n_desc++;
- } while (chan->xfer_len > 0 &&
- n_desc != MAX_DMA_DESC_NUM_GENERIC);
-
- dev_vdbg(hsotg->dev, "n_desc=%d\n", n_desc);
- qtd->in_process = 1;
- if (qh->ep_type == USB_ENDPOINT_XFER_CONTROL)
- break;
- if (n_desc == MAX_DMA_DESC_NUM_GENERIC)
- break;
- }
-
- if (n_desc) {
- qh->desc_list[n_desc - 1].status |=
- HOST_DMA_IOC | HOST_DMA_EOL | HOST_DMA_A;
- dev_vdbg(hsotg->dev, "set IOC/EOL/A bits in desc %d (%p)\n",
- n_desc - 1, &qh->desc_list[n_desc - 1]);
- if (n_desc > 1) {
- qh->desc_list[0].status |= HOST_DMA_A;
- dev_vdbg(hsotg->dev, "set A bit in desc 0 (%p)\n",
- &qh->desc_list[0]);
- }
- chan->ntd = n_desc;
- }
-}
-
-/**
- * dwc2_hcd_start_xfer_ddma() - Starts a transfer in Descriptor DMA mode
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: The QH to init
- *
- * Return: 0 if successful, negative error code otherwise
- *
- * For Control and Bulk endpoints, initializes descriptor list and starts the
- * transfer. For Interrupt and Isochronous endpoints, initializes descriptor
- * list then updates FrameList, marking appropriate entries as active.
- *
- * For Isochronous endpoints the starting descriptor index is calculated based
- * on the scheduled frame, but only on the first transfer descriptor within a
- * session. Then the transfer is started via enabling the channel.
- *
- * For Isochronous endpoints the channel is not halted on XferComplete
- * interrupt so remains assigned to the endpoint(QH) until session is done.
- */
-void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- /* Channel is already assigned */
- struct dwc2_host_chan *chan = qh->channel;
- u16 skip_frames = 0;
-
- switch (chan->ep_type) {
- case USB_ENDPOINT_XFER_CONTROL:
- case USB_ENDPOINT_XFER_BULK:
- dwc2_init_non_isoc_dma_desc(hsotg, qh);
- dwc2_hc_start_transfer_ddma(hsotg, chan);
- break;
- case USB_ENDPOINT_XFER_INT:
- dwc2_init_non_isoc_dma_desc(hsotg, qh);
- dwc2_update_frame_list(hsotg, qh, 1);
- dwc2_hc_start_transfer_ddma(hsotg, chan);
- break;
- case USB_ENDPOINT_XFER_ISOC:
- if (!qh->ntd)
- skip_frames = dwc2_recalc_initial_desc_idx(hsotg, qh);
- dwc2_init_isoc_dma_desc(hsotg, qh, skip_frames);
-
- if (!chan->xfer_started) {
- dwc2_update_frame_list(hsotg, qh, 1);
-
- /*
- * Always set to max, instead of actual size. Otherwise
- * ntd will be changed with channel being enabled. Not
- * recommended.
- */
- chan->ntd = dwc2_max_desc_num(qh);
-
- /* Enable channel only once for ISOC */
- dwc2_hc_start_transfer_ddma(hsotg, chan);
- }
-
- break;
- default:
- break;
- }
-}
-
-#define DWC2_CMPL_DONE 1
-#define DWC2_CMPL_STOP 2
-
-static int dwc2_cmpl_host_isoc_dma_desc(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- struct dwc2_qtd *qtd,
- struct dwc2_qh *qh, u16 idx)
-{
- struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[idx];
- struct dwc2_hcd_iso_packet_desc *frame_desc;
- u16 remain = 0;
- int rc = 0;
-
- if (!qtd->urb)
- return -EINVAL;
-
- frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index_last];
- dma_desc->buf = (u32)(qtd->urb->dma + frame_desc->offset);
- if (chan->ep_is_in)
- remain = (dma_desc->status & HOST_DMA_ISOC_NBYTES_MASK) >>
- HOST_DMA_ISOC_NBYTES_SHIFT;
-
- if ((dma_desc->status & HOST_DMA_STS_MASK) == HOST_DMA_STS_PKTERR) {
- /*
- * XactError, or unable to complete all the transactions
- * in the scheduled micro-frame/frame, both indicated by
- * HOST_DMA_STS_PKTERR
- */
- qtd->urb->error_count++;
- frame_desc->actual_length = qh->n_bytes[idx] - remain;
- frame_desc->status = -EPROTO;
- } else {
- /* Success */
- frame_desc->actual_length = qh->n_bytes[idx] - remain;
- frame_desc->status = 0;
- }
-
- if (++qtd->isoc_frame_index == qtd->urb->packet_count) {
- /*
- * urb->status is not used for isoc transfers here. The
- * individual frame_desc status are used instead.
- */
- dwc2_host_complete(hsotg, qtd, 0);
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
-
- /*
- * This check is necessary because urb_dequeue can be called
- * from urb complete callback (sound driver for example). All
- * pending URBs are dequeued there, so no need for further
- * processing.
- */
- if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE)
- return -1;
- rc = DWC2_CMPL_DONE;
- }
-
- qh->ntd--;
-
- /* Stop if IOC requested descriptor reached */
- if (dma_desc->status & HOST_DMA_IOC)
- rc = DWC2_CMPL_STOP;
-
- return rc;
-}
-
-static void dwc2_complete_isoc_xfer_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- enum dwc2_halt_status halt_status)
-{
- struct dwc2_hcd_iso_packet_desc *frame_desc;
- struct dwc2_qtd *qtd, *qtd_tmp;
- struct dwc2_qh *qh;
- u16 idx;
- int rc;
-
- qh = chan->qh;
- idx = qh->td_first;
-
- if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) {
- list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry)
- qtd->in_process = 0;
- return;
- }
-
- if (halt_status == DWC2_HC_XFER_AHB_ERR ||
- halt_status == DWC2_HC_XFER_BABBLE_ERR) {
- /*
- * Channel is halted in these error cases, considered as serious
- * issues.
- * Complete all URBs marking all frames as failed, irrespective
- * whether some of the descriptors (frames) succeeded or not.
- * Pass error code to completion routine as well, to update
- * urb->status, some of class drivers might use it to stop
- * queing transfer requests.
- */
- int err = halt_status == DWC2_HC_XFER_AHB_ERR ?
- -EIO : -EOVERFLOW;
-
- list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list,
- qtd_list_entry) {
- if (qtd->urb) {
- for (idx = 0; idx < qtd->urb->packet_count;
- idx++) {
- frame_desc = &qtd->urb->iso_descs[idx];
- frame_desc->status = err;
- }
-
- dwc2_host_complete(hsotg, qtd, err);
- }
-
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
- }
-
- return;
- }
-
- list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) {
- if (!qtd->in_process)
- break;
- do {
- rc = dwc2_cmpl_host_isoc_dma_desc(hsotg, chan, qtd, qh,
- idx);
- if (rc < 0)
- return;
- idx = dwc2_desclist_idx_inc(idx, qh->interval,
- chan->speed);
- if (rc == DWC2_CMPL_STOP)
- goto stop_scan;
- if (rc == DWC2_CMPL_DONE)
- break;
- } while (idx != qh->td_first);
- }
-
-stop_scan:
- qh->td_first = idx;
-}
-
-static int dwc2_update_non_isoc_urb_state_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- struct dwc2_qtd *qtd,
- struct dwc2_hcd_dma_desc *dma_desc,
- enum dwc2_halt_status halt_status,
- u32 n_bytes, int *xfer_done)
-{
- struct dwc2_hcd_urb *urb = qtd->urb;
- u16 remain = 0;
-
- if (chan->ep_is_in)
- remain = (dma_desc->status & HOST_DMA_NBYTES_MASK) >>
- HOST_DMA_NBYTES_SHIFT;
-
- dev_vdbg(hsotg->dev, "remain=%d dwc2_urb=%p\n", remain, urb);
-
- if (halt_status == DWC2_HC_XFER_AHB_ERR) {
- dev_err(hsotg->dev, "EIO\n");
- urb->status = -EIO;
- return 1;
- }
-
- if ((dma_desc->status & HOST_DMA_STS_MASK) == HOST_DMA_STS_PKTERR) {
- switch (halt_status) {
- case DWC2_HC_XFER_STALL:
- dev_vdbg(hsotg->dev, "Stall\n");
- urb->status = -EPIPE;
- break;
- case DWC2_HC_XFER_BABBLE_ERR:
- dev_err(hsotg->dev, "Babble\n");
- urb->status = -EOVERFLOW;
- break;
- case DWC2_HC_XFER_XACT_ERR:
- dev_err(hsotg->dev, "XactErr\n");
- urb->status = -EPROTO;
- break;
- default:
- dev_err(hsotg->dev,
- "%s: Unhandled descriptor error status (%d)\n",
- __func__, halt_status);
- break;
- }
- return 1;
- }
-
- if (dma_desc->status & HOST_DMA_A) {
- dev_vdbg(hsotg->dev,
- "Active descriptor encountered on channel %d\n",
- chan->hc_num);
- return 0;
- }
-
- if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL) {
- if (qtd->control_phase == DWC2_CONTROL_DATA) {
- urb->actual_length += n_bytes - remain;
- if (remain || urb->actual_length >= urb->length) {
- /*
- * For Control Data stage do not set urb->status
- * to 0, to prevent URB callback. Set it when
- * Status phase is done. See below.
- */
- *xfer_done = 1;
- }
- } else if (qtd->control_phase == DWC2_CONTROL_STATUS) {
- urb->status = 0;
- *xfer_done = 1;
- }
- /* No handling for SETUP stage */
- } else {
- /* BULK and INTR */
- urb->actual_length += n_bytes - remain;
- dev_vdbg(hsotg->dev, "length=%d actual=%d\n", urb->length,
- urb->actual_length);
- if (remain || urb->actual_length >= urb->length) {
- urb->status = 0;
- *xfer_done = 1;
- }
- }
-
- return 0;
-}
-
-static int dwc2_process_non_isoc_desc(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- int chnum, struct dwc2_qtd *qtd,
- int desc_num,
- enum dwc2_halt_status halt_status,
- int *xfer_done)
-{
- struct dwc2_qh *qh = chan->qh;
- struct dwc2_hcd_urb *urb = qtd->urb;
- struct dwc2_hcd_dma_desc *dma_desc;
- u32 n_bytes;
- int failed;
-
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- if (!urb)
- return -EINVAL;
-
- dma_desc = &qh->desc_list[desc_num];
- n_bytes = qh->n_bytes[desc_num];
- dev_vdbg(hsotg->dev,
- "qtd=%p dwc2_urb=%p desc_num=%d desc=%p n_bytes=%d\n",
- qtd, urb, desc_num, dma_desc, n_bytes);
- failed = dwc2_update_non_isoc_urb_state_ddma(hsotg, chan, qtd, dma_desc,
- halt_status, n_bytes,
- xfer_done);
- if (failed || (*xfer_done && urb->status != -EINPROGRESS)) {
- dwc2_host_complete(hsotg, qtd, urb->status);
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
- dev_vdbg(hsotg->dev, "failed=%1x xfer_done=%1x status=%08x\n",
- failed, *xfer_done, urb->status);
- return failed;
- }
-
- if (qh->ep_type == USB_ENDPOINT_XFER_CONTROL) {
- switch (qtd->control_phase) {
- case DWC2_CONTROL_SETUP:
- if (urb->length > 0)
- qtd->control_phase = DWC2_CONTROL_DATA;
- else
- qtd->control_phase = DWC2_CONTROL_STATUS;
- dev_vdbg(hsotg->dev,
- " Control setup transaction done\n");
- break;
- case DWC2_CONTROL_DATA:
- if (*xfer_done) {
- qtd->control_phase = DWC2_CONTROL_STATUS;
- dev_vdbg(hsotg->dev,
- " Control data transfer done\n");
- } else if (desc_num + 1 == qtd->n_desc) {
- /*
- * Last descriptor for Control data stage which
- * is not completed yet
- */
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum,
- qtd);
- }
- break;
- default:
- break;
- }
- }
-
- return 0;
-}
-
-static void dwc2_complete_non_isoc_xfer_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- int chnum,
- enum dwc2_halt_status halt_status)
-{
- struct list_head *qtd_item, *qtd_tmp;
- struct dwc2_qh *qh = chan->qh;
- struct dwc2_qtd *qtd = NULL;
- int xfer_done;
- int desc_num = 0;
-
- if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) {
- list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry)
- qtd->in_process = 0;
- return;
- }
-
- list_for_each_safe(qtd_item, qtd_tmp, &qh->qtd_list) {
- int i;
-
- qtd = list_entry(qtd_item, struct dwc2_qtd, qtd_list_entry);
- xfer_done = 0;
-
- for (i = 0; i < qtd->n_desc; i++) {
- if (dwc2_process_non_isoc_desc(hsotg, chan, chnum, qtd,
- desc_num, halt_status,
- &xfer_done)) {
- qtd = NULL;
- break;
- }
- desc_num++;
- }
- }
-
- if (qh->ep_type != USB_ENDPOINT_XFER_CONTROL) {
- /*
- * Resetting the data toggle for bulk and interrupt endpoints
- * in case of stall. See handle_hc_stall_intr().
- */
- if (halt_status == DWC2_HC_XFER_STALL)
- qh->data_toggle = DWC2_HC_PID_DATA0;
- else if (qtd)
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
- }
-
- if (halt_status == DWC2_HC_XFER_COMPLETE) {
- if (chan->hcint & HCINTMSK_NYET) {
- /*
- * Got a NYET on the last transaction of the transfer.
- * It means that the endpoint should be in the PING
- * state at the beginning of the next transfer.
- */
- qh->ping_state = 1;
- }
- }
-}
-
-/**
- * dwc2_hcd_complete_xfer_ddma() - Scans the descriptor list, updates URB's
- * status and calls completion routine for the URB if it's done. Called from
- * interrupt handlers.
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @chan: Host channel the transfer is completed on
- * @chnum: Index of Host channel registers
- * @halt_status: Reason the channel is being halted or just XferComplete
- * for isochronous transfers
- *
- * Releases the channel to be used by other transfers.
- * In case of Isochronous endpoint the channel is not halted until the end of
- * the session, i.e. QTD list is empty.
- * If periodic channel released the FrameList is updated accordingly.
- * Calls transaction selection routines to activate pending transfers.
- */
-void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- enum dwc2_halt_status halt_status)
-{
- struct dwc2_qh *qh = chan->qh;
- int continue_isoc_xfer = 0;
- enum dwc2_transaction_type tr_type;
-
- if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
- dwc2_complete_isoc_xfer_ddma(hsotg, chan, halt_status);
-
- /* Release the channel if halted or session completed */
- if (halt_status != DWC2_HC_XFER_COMPLETE ||
- list_empty(&qh->qtd_list)) {
- /* Halt the channel if session completed */
- if (halt_status == DWC2_HC_XFER_COMPLETE)
- dwc2_hc_halt(hsotg, chan, halt_status);
- dwc2_release_channel_ddma(hsotg, qh);
- dwc2_hcd_qh_unlink(hsotg, qh);
- } else {
- /* Keep in assigned schedule to continue transfer */
- list_move(&qh->qh_list_entry,
- &hsotg->periodic_sched_assigned);
- continue_isoc_xfer = 1;
- }
- /*
- * Todo: Consider the case when period exceeds FrameList size.
- * Frame Rollover interrupt should be used.
- */
- } else {
- /*
- * Scan descriptor list to complete the URB(s), then release
- * the channel
- */
- dwc2_complete_non_isoc_xfer_ddma(hsotg, chan, chnum,
- halt_status);
- dwc2_release_channel_ddma(hsotg, qh);
- dwc2_hcd_qh_unlink(hsotg, qh);
-
- if (!list_empty(&qh->qtd_list)) {
- /*
- * Add back to inactive non-periodic schedule on normal
- * completion
- */
- dwc2_hcd_qh_add(hsotg, qh);
- }
- }
-
- tr_type = dwc2_hcd_select_transactions(hsotg);
- if (tr_type != DWC2_TRANSACTION_NONE || continue_isoc_xfer) {
- if (continue_isoc_xfer) {
- if (tr_type == DWC2_TRANSACTION_NONE)
- tr_type = DWC2_TRANSACTION_PERIODIC;
- else if (tr_type == DWC2_TRANSACTION_NON_PERIODIC)
- tr_type = DWC2_TRANSACTION_ALL;
- }
- dwc2_hcd_queue_transactions(hsotg, tr_type);
- }
-}
+++ /dev/null
-/*
- * hcd_intr.c - DesignWare HS OTG Controller host-mode interrupt handling
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * This file contains the interrupt handlers for Host mode
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-
-#include <linux/usb/hcd.h>
-#include <linux/usb/ch11.h>
-
-#include "core.h"
-#include "hcd.h"
-
-/* This function is for debug only */
-static void dwc2_track_missed_sofs(struct dwc2_hsotg *hsotg)
-{
-#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
- u16 curr_frame_number = hsotg->frame_number;
-
- if (hsotg->frame_num_idx < FRAME_NUM_ARRAY_SIZE) {
- if (((hsotg->last_frame_num + 1) & HFNUM_MAX_FRNUM) !=
- curr_frame_number) {
- hsotg->frame_num_array[hsotg->frame_num_idx] =
- curr_frame_number;
- hsotg->last_frame_num_array[hsotg->frame_num_idx] =
- hsotg->last_frame_num;
- hsotg->frame_num_idx++;
- }
- } else if (!hsotg->dumped_frame_num_array) {
- int i;
-
- dev_info(hsotg->dev, "Frame Last Frame\n");
- dev_info(hsotg->dev, "----- ----------\n");
- for (i = 0; i < FRAME_NUM_ARRAY_SIZE; i++) {
- dev_info(hsotg->dev, "0x%04x 0x%04x\n",
- hsotg->frame_num_array[i],
- hsotg->last_frame_num_array[i]);
- }
- hsotg->dumped_frame_num_array = 1;
- }
- hsotg->last_frame_num = curr_frame_number;
-#endif
-}
-
-static void dwc2_hc_handle_tt_clear(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- struct dwc2_qtd *qtd)
-{
- struct urb *usb_urb;
-
- if (!chan->qh)
- return;
-
- if (chan->qh->dev_speed == USB_SPEED_HIGH)
- return;
-
- if (!qtd->urb)
- return;
-
- usb_urb = qtd->urb->priv;
- if (!usb_urb || !usb_urb->dev || !usb_urb->dev->tt)
- return;
-
- if (qtd->urb->status != -EPIPE && qtd->urb->status != -EREMOTEIO) {
- chan->qh->tt_buffer_dirty = 1;
- if (usb_hub_clear_tt_buffer(usb_urb))
- /* Clear failed; let's hope things work anyway */
- chan->qh->tt_buffer_dirty = 0;
- }
-}
-
-/*
- * Handles the start-of-frame interrupt in host mode. Non-periodic
- * transactions may be queued to the DWC_otg controller for the current
- * (micro)frame. Periodic transactions may be queued to the controller
- * for the next (micro)frame.
- */
-static void dwc2_sof_intr(struct dwc2_hsotg *hsotg)
-{
- struct list_head *qh_entry;
- struct dwc2_qh *qh;
- enum dwc2_transaction_type tr_type;
-
-#ifdef DEBUG_SOF
- dev_vdbg(hsotg->dev, "--Start of Frame Interrupt--\n");
-#endif
-
- hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);
-
- dwc2_track_missed_sofs(hsotg);
-
- /* Determine whether any periodic QHs should be executed */
- qh_entry = hsotg->periodic_sched_inactive.next;
- while (qh_entry != &hsotg->periodic_sched_inactive) {
- qh = list_entry(qh_entry, struct dwc2_qh, qh_list_entry);
- qh_entry = qh_entry->next;
- if (dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number))
- /*
- * Move QH to the ready list to be executed next
- * (micro)frame
- */
- list_move(&qh->qh_list_entry,
- &hsotg->periodic_sched_ready);
- }
- tr_type = dwc2_hcd_select_transactions(hsotg);
- if (tr_type != DWC2_TRANSACTION_NONE)
- dwc2_hcd_queue_transactions(hsotg, tr_type);
-
- /* Clear interrupt */
- writel(GINTSTS_SOF, hsotg->regs + GINTSTS);
-}
-
-/*
- * Handles the Rx FIFO Level Interrupt, which indicates that there is
- * at least one packet in the Rx FIFO. The packets are moved from the FIFO to
- * memory if the DWC_otg controller is operating in Slave mode.
- */
-static void dwc2_rx_fifo_level_intr(struct dwc2_hsotg *hsotg)
-{
- u32 grxsts, chnum, bcnt, dpid, pktsts;
- struct dwc2_host_chan *chan;
-
- if (dbg_perio())
- dev_vdbg(hsotg->dev, "--RxFIFO Level Interrupt--\n");
-
- grxsts = readl(hsotg->regs + GRXSTSP);
- chnum = (grxsts & GRXSTS_HCHNUM_MASK) >> GRXSTS_HCHNUM_SHIFT;
- chan = hsotg->hc_ptr_array[chnum];
- if (!chan) {
- dev_err(hsotg->dev, "Unable to get corresponding channel\n");
- return;
- }
-
- bcnt = (grxsts & GRXSTS_BYTECNT_MASK) >> GRXSTS_BYTECNT_SHIFT;
- dpid = (grxsts & GRXSTS_DPID_MASK) >> GRXSTS_DPID_SHIFT;
- pktsts = (grxsts & GRXSTS_PKTSTS_MASK) >> GRXSTS_PKTSTS_SHIFT;
-
- /* Packet Status */
- if (dbg_perio()) {
- dev_vdbg(hsotg->dev, " Ch num = %d\n", chnum);
- dev_vdbg(hsotg->dev, " Count = %d\n", bcnt);
- dev_vdbg(hsotg->dev, " DPID = %d, chan.dpid = %d\n", dpid,
- chan->data_pid_start);
- dev_vdbg(hsotg->dev, " PStatus = %d\n", pktsts);
- }
-
- switch (pktsts) {
- case GRXSTS_PKTSTS_HCHIN:
- /* Read the data into the host buffer */
- if (bcnt > 0) {
- dwc2_read_packet(hsotg, chan->xfer_buf, bcnt);
-
- /* Update the HC fields for the next packet received */
- chan->xfer_count += bcnt;
- chan->xfer_buf += bcnt;
- }
- break;
- case GRXSTS_PKTSTS_HCHIN_XFER_COMP:
- case GRXSTS_PKTSTS_DATATOGGLEERR:
- case GRXSTS_PKTSTS_HCHHALTED:
- /* Handled in interrupt, just ignore data */
- break;
- default:
- dev_err(hsotg->dev,
- "RxFIFO Level Interrupt: Unknown status %d\n", pktsts);
- break;
- }
-}
-
-/*
- * This interrupt occurs when the non-periodic Tx FIFO is half-empty. More
- * data packets may be written to the FIFO for OUT transfers. More requests
- * may be written to the non-periodic request queue for IN transfers. This
- * interrupt is enabled only in Slave mode.
- */
-static void dwc2_np_tx_fifo_empty_intr(struct dwc2_hsotg *hsotg)
-{
- dev_vdbg(hsotg->dev, "--Non-Periodic TxFIFO Empty Interrupt--\n");
- dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_NON_PERIODIC);
-}
-
-/*
- * This interrupt occurs when the periodic Tx FIFO is half-empty. More data
- * packets may be written to the FIFO for OUT transfers. More requests may be
- * written to the periodic request queue for IN transfers. This interrupt is
- * enabled only in Slave mode.
- */
-static void dwc2_perio_tx_fifo_empty_intr(struct dwc2_hsotg *hsotg)
-{
- if (dbg_perio())
- dev_vdbg(hsotg->dev, "--Periodic TxFIFO Empty Interrupt--\n");
- dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_PERIODIC);
-}
-
-static void dwc2_hprt0_enable(struct dwc2_hsotg *hsotg, u32 hprt0,
- u32 *hprt0_modify)
-{
- struct dwc2_core_params *params = hsotg->core_params;
- int do_reset = 0;
- u32 usbcfg;
- u32 prtspd;
- u32 hcfg;
- u32 fslspclksel;
- u32 hfir;
-
- dev_vdbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
-
- /* Every time when port enables calculate HFIR.FrInterval */
- hfir = readl(hsotg->regs + HFIR);
- hfir &= ~HFIR_FRINT_MASK;
- hfir |= dwc2_calc_frame_interval(hsotg) << HFIR_FRINT_SHIFT &
- HFIR_FRINT_MASK;
- writel(hfir, hsotg->regs + HFIR);
-
- /* Check if we need to adjust the PHY clock speed for low power */
- if (!params->host_support_fs_ls_low_power) {
- /* Port has been enabled, set the reset change flag */
- hsotg->flags.b.port_reset_change = 1;
- return;
- }
-
- usbcfg = readl(hsotg->regs + GUSBCFG);
- prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
-
- if (prtspd == HPRT0_SPD_LOW_SPEED || prtspd == HPRT0_SPD_FULL_SPEED) {
- /* Low power */
- if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL)) {
- /* Set PHY low power clock select for FS/LS devices */
- usbcfg |= GUSBCFG_PHY_LP_CLK_SEL;
- writel(usbcfg, hsotg->regs + GUSBCFG);
- do_reset = 1;
- }
-
- hcfg = readl(hsotg->regs + HCFG);
- fslspclksel = (hcfg & HCFG_FSLSPCLKSEL_MASK) >>
- HCFG_FSLSPCLKSEL_SHIFT;
-
- if (prtspd == HPRT0_SPD_LOW_SPEED &&
- params->host_ls_low_power_phy_clk ==
- DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ) {
- /* 6 MHZ */
- dev_vdbg(hsotg->dev,
- "FS_PHY programming HCFG to 6 MHz\n");
- if (fslspclksel != HCFG_FSLSPCLKSEL_6_MHZ) {
- fslspclksel = HCFG_FSLSPCLKSEL_6_MHZ;
- hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
- hcfg |= fslspclksel << HCFG_FSLSPCLKSEL_SHIFT;
- writel(hcfg, hsotg->regs + HCFG);
- do_reset = 1;
- }
- } else {
- /* 48 MHZ */
- dev_vdbg(hsotg->dev,
- "FS_PHY programming HCFG to 48 MHz\n");
- if (fslspclksel != HCFG_FSLSPCLKSEL_48_MHZ) {
- fslspclksel = HCFG_FSLSPCLKSEL_48_MHZ;
- hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
- hcfg |= fslspclksel << HCFG_FSLSPCLKSEL_SHIFT;
- writel(hcfg, hsotg->regs + HCFG);
- do_reset = 1;
- }
- }
- } else {
- /* Not low power */
- if (usbcfg & GUSBCFG_PHY_LP_CLK_SEL) {
- usbcfg &= ~GUSBCFG_PHY_LP_CLK_SEL;
- writel(usbcfg, hsotg->regs + GUSBCFG);
- do_reset = 1;
- }
- }
-
- if (do_reset) {
- *hprt0_modify |= HPRT0_RST;
- queue_delayed_work(hsotg->wq_otg, &hsotg->reset_work,
- msecs_to_jiffies(60));
- } else {
- /* Port has been enabled, set the reset change flag */
- hsotg->flags.b.port_reset_change = 1;
- }
-}
-
-/*
- * There are multiple conditions that can cause a port interrupt. This function
- * determines which interrupt conditions have occurred and handles them
- * appropriately.
- */
-static void dwc2_port_intr(struct dwc2_hsotg *hsotg)
-{
- u32 hprt0;
- u32 hprt0_modify;
-
- dev_vdbg(hsotg->dev, "--Port Interrupt--\n");
-
- hprt0 = readl(hsotg->regs + HPRT0);
- hprt0_modify = hprt0;
-
- /*
- * Clear appropriate bits in HPRT0 to clear the interrupt bit in
- * GINTSTS
- */
- hprt0_modify &= ~(HPRT0_ENA | HPRT0_CONNDET | HPRT0_ENACHG |
- HPRT0_OVRCURRCHG);
-
- /*
- * Port Connect Detected
- * Set flag and clear if detected
- */
- if (hprt0 & HPRT0_CONNDET) {
- dev_vdbg(hsotg->dev,
- "--Port Interrupt HPRT0=0x%08x Port Connect Detected--\n",
- hprt0);
- hsotg->flags.b.port_connect_status_change = 1;
- hsotg->flags.b.port_connect_status = 1;
- hprt0_modify |= HPRT0_CONNDET;
-
- /*
- * The Hub driver asserts a reset when it sees port connect
- * status change flag
- */
- }
-
- /*
- * Port Enable Changed
- * Clear if detected - Set internal flag if disabled
- */
- if (hprt0 & HPRT0_ENACHG) {
- dev_vdbg(hsotg->dev,
- " --Port Interrupt HPRT0=0x%08x Port Enable Changed (now %d)--\n",
- hprt0, !!(hprt0 & HPRT0_ENA));
- hprt0_modify |= HPRT0_ENACHG;
- if (hprt0 & HPRT0_ENA)
- dwc2_hprt0_enable(hsotg, hprt0, &hprt0_modify);
- else
- hsotg->flags.b.port_enable_change = 1;
- }
-
- /* Overcurrent Change Interrupt */
- if (hprt0 & HPRT0_OVRCURRCHG) {
- dev_vdbg(hsotg->dev,
- " --Port Interrupt HPRT0=0x%08x Port Overcurrent Changed--\n",
- hprt0);
- hsotg->flags.b.port_over_current_change = 1;
- hprt0_modify |= HPRT0_OVRCURRCHG;
- }
-
- /* Clear Port Interrupts */
- writel(hprt0_modify, hsotg->regs + HPRT0);
-}
-
-/*
- * Gets the actual length of a transfer after the transfer halts. halt_status
- * holds the reason for the halt.
- *
- * For IN transfers where halt_status is DWC2_HC_XFER_COMPLETE, *short_read
- * is set to 1 upon return if less than the requested number of bytes were
- * transferred. short_read may also be NULL on entry, in which case it remains
- * unchanged.
- */
-static u32 dwc2_get_actual_xfer_length(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd,
- enum dwc2_halt_status halt_status,
- int *short_read)
-{
- u32 hctsiz, count, length;
-
- hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
-
- if (halt_status == DWC2_HC_XFER_COMPLETE) {
- if (chan->ep_is_in) {
- count = (hctsiz & TSIZ_XFERSIZE_MASK) >>
- TSIZ_XFERSIZE_SHIFT;
- length = chan->xfer_len - count;
- if (short_read != NULL)
- *short_read = (count != 0);
- } else if (chan->qh->do_split) {
- length = qtd->ssplit_out_xfer_count;
- } else {
- length = chan->xfer_len;
- }
- } else {
- /*
- * Must use the hctsiz.pktcnt field to determine how much data
- * has been transferred. This field reflects the number of
- * packets that have been transferred via the USB. This is
- * always an integral number of packets if the transfer was
- * halted before its normal completion. (Can't use the
- * hctsiz.xfersize field because that reflects the number of
- * bytes transferred via the AHB, not the USB).
- */
- count = (hctsiz & TSIZ_PKTCNT_MASK) >> TSIZ_PKTCNT_SHIFT;
- length = (chan->start_pkt_count - count) * chan->max_packet;
- }
-
- return length;
-}
-
-/**
- * dwc2_update_urb_state() - Updates the state of the URB after a Transfer
- * Complete interrupt on the host channel. Updates the actual_length field
- * of the URB based on the number of bytes transferred via the host channel.
- * Sets the URB status if the data transfer is finished.
- *
- * Return: 1 if the data transfer specified by the URB is completely finished,
- * 0 otherwise
- */
-static int dwc2_update_urb_state(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_hcd_urb *urb,
- struct dwc2_qtd *qtd)
-{
- u32 hctsiz;
- int xfer_done = 0;
- int short_read = 0;
- int xfer_length = dwc2_get_actual_xfer_length(hsotg, chan, chnum, qtd,
- DWC2_HC_XFER_COMPLETE,
- &short_read);
-
- if (urb->actual_length + xfer_length > urb->length) {
- dev_warn(hsotg->dev, "%s(): trimming xfer length\n", __func__);
- xfer_length = urb->length - urb->actual_length;
- }
-
- /* Non DWORD-aligned buffer case handling */
- if (chan->align_buf && xfer_length && chan->ep_is_in) {
- dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
- dma_sync_single_for_cpu(hsotg->dev, urb->dma, urb->length,
- DMA_FROM_DEVICE);
- memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf,
- xfer_length);
- dma_sync_single_for_device(hsotg->dev, urb->dma, urb->length,
- DMA_FROM_DEVICE);
- }
-
- dev_vdbg(hsotg->dev, "urb->actual_length=%d xfer_length=%d\n",
- urb->actual_length, xfer_length);
- urb->actual_length += xfer_length;
-
- if (xfer_length && chan->ep_type == USB_ENDPOINT_XFER_BULK &&
- (urb->flags & URB_SEND_ZERO_PACKET) &&
- urb->actual_length >= urb->length &&
- !(urb->length % chan->max_packet)) {
- xfer_done = 0;
- } else if (short_read || urb->actual_length >= urb->length) {
- xfer_done = 1;
- urb->status = 0;
- }
-
- hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
- dev_vdbg(hsotg->dev, "DWC_otg: %s: %s, channel %d\n",
- __func__, (chan->ep_is_in ? "IN" : "OUT"), chnum);
- dev_vdbg(hsotg->dev, " chan->xfer_len %d\n", chan->xfer_len);
- dev_vdbg(hsotg->dev, " hctsiz.xfersize %d\n",
- (hctsiz & TSIZ_XFERSIZE_MASK) >> TSIZ_XFERSIZE_SHIFT);
- dev_vdbg(hsotg->dev, " urb->transfer_buffer_length %d\n", urb->length);
- dev_vdbg(hsotg->dev, " urb->actual_length %d\n", urb->actual_length);
- dev_vdbg(hsotg->dev, " short_read %d, xfer_done %d\n", short_read,
- xfer_done);
-
- return xfer_done;
-}
-
-/*
- * Save the starting data toggle for the next transfer. The data toggle is
- * saved in the QH for non-control transfers and it's saved in the QTD for
- * control transfers.
- */
-void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- u32 hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
- u32 pid = (hctsiz & TSIZ_SC_MC_PID_MASK) >> TSIZ_SC_MC_PID_SHIFT;
-
- if (chan->ep_type != USB_ENDPOINT_XFER_CONTROL) {
- if (pid == TSIZ_SC_MC_PID_DATA0)
- chan->qh->data_toggle = DWC2_HC_PID_DATA0;
- else
- chan->qh->data_toggle = DWC2_HC_PID_DATA1;
- } else {
- if (pid == TSIZ_SC_MC_PID_DATA0)
- qtd->data_toggle = DWC2_HC_PID_DATA0;
- else
- qtd->data_toggle = DWC2_HC_PID_DATA1;
- }
-}
-
-/**
- * dwc2_update_isoc_urb_state() - Updates the state of an Isochronous URB when
- * the transfer is stopped for any reason. The fields of the current entry in
- * the frame descriptor array are set based on the transfer state and the input
- * halt_status. Completes the Isochronous URB if all the URB frames have been
- * completed.
- *
- * Return: DWC2_HC_XFER_COMPLETE if there are more frames remaining to be
- * transferred in the URB. Otherwise return DWC2_HC_XFER_URB_COMPLETE.
- */
-static enum dwc2_halt_status dwc2_update_isoc_urb_state(
- struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
- int chnum, struct dwc2_qtd *qtd,
- enum dwc2_halt_status halt_status)
-{
- struct dwc2_hcd_iso_packet_desc *frame_desc;
- struct dwc2_hcd_urb *urb = qtd->urb;
-
- if (!urb)
- return DWC2_HC_XFER_NO_HALT_STATUS;
-
- frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
-
- switch (halt_status) {
- case DWC2_HC_XFER_COMPLETE:
- frame_desc->status = 0;
- frame_desc->actual_length = dwc2_get_actual_xfer_length(hsotg,
- chan, chnum, qtd, halt_status, NULL);
-
- /* Non DWORD-aligned buffer case handling */
- if (chan->align_buf && frame_desc->actual_length &&
- chan->ep_is_in) {
- dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n",
- __func__);
- dma_sync_single_for_cpu(hsotg->dev, urb->dma,
- urb->length, DMA_FROM_DEVICE);
- memcpy(urb->buf + frame_desc->offset +
- qtd->isoc_split_offset, chan->qh->dw_align_buf,
- frame_desc->actual_length);
- dma_sync_single_for_device(hsotg->dev, urb->dma,
- urb->length,
- DMA_FROM_DEVICE);
- }
- break;
- case DWC2_HC_XFER_FRAME_OVERRUN:
- urb->error_count++;
- if (chan->ep_is_in)
- frame_desc->status = -ENOSR;
- else
- frame_desc->status = -ECOMM;
- frame_desc->actual_length = 0;
- break;
- case DWC2_HC_XFER_BABBLE_ERR:
- urb->error_count++;
- frame_desc->status = -EOVERFLOW;
- /* Don't need to update actual_length in this case */
- break;
- case DWC2_HC_XFER_XACT_ERR:
- urb->error_count++;
- frame_desc->status = -EPROTO;
- frame_desc->actual_length = dwc2_get_actual_xfer_length(hsotg,
- chan, chnum, qtd, halt_status, NULL);
-
- /* Non DWORD-aligned buffer case handling */
- if (chan->align_buf && frame_desc->actual_length &&
- chan->ep_is_in) {
- dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n",
- __func__);
- dma_sync_single_for_cpu(hsotg->dev, urb->dma,
- urb->length, DMA_FROM_DEVICE);
- memcpy(urb->buf + frame_desc->offset +
- qtd->isoc_split_offset, chan->qh->dw_align_buf,
- frame_desc->actual_length);
- dma_sync_single_for_device(hsotg->dev, urb->dma,
- urb->length,
- DMA_FROM_DEVICE);
- }
-
- /* Skip whole frame */
- if (chan->qh->do_split &&
- chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in &&
- hsotg->core_params->dma_enable > 0) {
- qtd->complete_split = 0;
- qtd->isoc_split_offset = 0;
- }
-
- break;
- default:
- dev_err(hsotg->dev, "Unhandled halt_status (%d)\n",
- halt_status);
- break;
- }
-
- if (++qtd->isoc_frame_index == urb->packet_count) {
- /*
- * urb->status is not used for isoc transfers. The individual
- * frame_desc statuses are used instead.
- */
- dwc2_host_complete(hsotg, qtd, 0);
- halt_status = DWC2_HC_XFER_URB_COMPLETE;
- } else {
- halt_status = DWC2_HC_XFER_COMPLETE;
- }
-
- return halt_status;
-}
-
-/*
- * Frees the first QTD in the QH's list if free_qtd is 1. For non-periodic
- * QHs, removes the QH from the active non-periodic schedule. If any QTDs are
- * still linked to the QH, the QH is added to the end of the inactive
- * non-periodic schedule. For periodic QHs, removes the QH from the periodic
- * schedule if no more QTDs are linked to the QH.
- */
-static void dwc2_deactivate_qh(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- int free_qtd)
-{
- int continue_split = 0;
- struct dwc2_qtd *qtd;
-
- if (dbg_qh(qh))
- dev_vdbg(hsotg->dev, " %s(%p,%p,%d)\n", __func__,
- hsotg, qh, free_qtd);
-
- if (list_empty(&qh->qtd_list)) {
- dev_dbg(hsotg->dev, "## QTD list empty ##\n");
- goto no_qtd;
- }
-
- qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry);
-
- if (qtd->complete_split)
- continue_split = 1;
- else if (qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_MID ||
- qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_END)
- continue_split = 1;
-
- if (free_qtd) {
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
- continue_split = 0;
- }
-
-no_qtd:
- if (qh->channel)
- qh->channel->align_buf = 0;
- qh->channel = NULL;
- dwc2_hcd_qh_deactivate(hsotg, qh, continue_split);
-}
-
-/**
- * dwc2_release_channel() - Releases a host channel for use by other transfers
- *
- * @hsotg: The HCD state structure
- * @chan: The host channel to release
- * @qtd: The QTD associated with the host channel. This QTD may be
- * freed if the transfer is complete or an error has occurred.
- * @halt_status: Reason the channel is being released. This status
- * determines the actions taken by this function.
- *
- * Also attempts to select and queue more transactions since at least one host
- * channel is available.
- */
-static void dwc2_release_channel(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- struct dwc2_qtd *qtd,
- enum dwc2_halt_status halt_status)
-{
- enum dwc2_transaction_type tr_type;
- u32 haintmsk;
- int free_qtd = 0;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, " %s: channel %d, halt_status %d\n",
- __func__, chan->hc_num, halt_status);
-
- switch (halt_status) {
- case DWC2_HC_XFER_URB_COMPLETE:
- free_qtd = 1;
- break;
- case DWC2_HC_XFER_AHB_ERR:
- case DWC2_HC_XFER_STALL:
- case DWC2_HC_XFER_BABBLE_ERR:
- free_qtd = 1;
- break;
- case DWC2_HC_XFER_XACT_ERR:
- if (qtd && qtd->error_count >= 3) {
- dev_vdbg(hsotg->dev,
- " Complete URB with transaction error\n");
- free_qtd = 1;
- dwc2_host_complete(hsotg, qtd, -EPROTO);
- }
- break;
- case DWC2_HC_XFER_URB_DEQUEUE:
- /*
- * The QTD has already been removed and the QH has been
- * deactivated. Don't want to do anything except release the
- * host channel and try to queue more transfers.
- */
- goto cleanup;
- case DWC2_HC_XFER_PERIODIC_INCOMPLETE:
- dev_vdbg(hsotg->dev, " Complete URB with I/O error\n");
- free_qtd = 1;
- dwc2_host_complete(hsotg, qtd, -EIO);
- break;
- case DWC2_HC_XFER_NO_HALT_STATUS:
- default:
- break;
- }
-
- dwc2_deactivate_qh(hsotg, chan->qh, free_qtd);
-
-cleanup:
- /*
- * Release the host channel for use by other transfers. The cleanup
- * function clears the channel interrupt enables and conditions, so
- * there's no need to clear the Channel Halted interrupt separately.
- */
- if (!list_empty(&chan->hc_list_entry))
- list_del(&chan->hc_list_entry);
- dwc2_hc_cleanup(hsotg, chan);
- list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
-
- if (hsotg->core_params->uframe_sched > 0) {
- hsotg->available_host_channels++;
- } else {
- switch (chan->ep_type) {
- case USB_ENDPOINT_XFER_CONTROL:
- case USB_ENDPOINT_XFER_BULK:
- hsotg->non_periodic_channels--;
- break;
- default:
- /*
- * Don't release reservations for periodic channels
- * here. That's done when a periodic transfer is
- * descheduled (i.e. when the QH is removed from the
- * periodic schedule).
- */
- break;
- }
- }
-
- haintmsk = readl(hsotg->regs + HAINTMSK);
- haintmsk &= ~(1 << chan->hc_num);
- writel(haintmsk, hsotg->regs + HAINTMSK);
-
- /* Try to queue more transfers now that there's a free channel */
- tr_type = dwc2_hcd_select_transactions(hsotg);
- if (tr_type != DWC2_TRANSACTION_NONE)
- dwc2_hcd_queue_transactions(hsotg, tr_type);
-}
-
-/*
- * Halts a host channel. If the channel cannot be halted immediately because
- * the request queue is full, this function ensures that the FIFO empty
- * interrupt for the appropriate queue is enabled so that the halt request can
- * be queued when there is space in the request queue.
- *
- * This function may also be called in DMA mode. In that case, the channel is
- * simply released since the core always halts the channel automatically in
- * DMA mode.
- */
-static void dwc2_halt_channel(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, struct dwc2_qtd *qtd,
- enum dwc2_halt_status halt_status)
-{
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- if (hsotg->core_params->dma_enable > 0) {
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "DMA enabled\n");
- dwc2_release_channel(hsotg, chan, qtd, halt_status);
- return;
- }
-
- /* Slave mode processing */
- dwc2_hc_halt(hsotg, chan, halt_status);
-
- if (chan->halt_on_queue) {
- u32 gintmsk;
-
- dev_vdbg(hsotg->dev, "Halt on queue\n");
- if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
- chan->ep_type == USB_ENDPOINT_XFER_BULK) {
- dev_vdbg(hsotg->dev, "control/bulk\n");
- /*
- * Make sure the Non-periodic Tx FIFO empty interrupt
- * is enabled so that the non-periodic schedule will
- * be processed
- */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk |= GINTSTS_NPTXFEMP;
- writel(gintmsk, hsotg->regs + GINTMSK);
- } else {
- dev_vdbg(hsotg->dev, "isoc/intr\n");
- /*
- * Move the QH from the periodic queued schedule to
- * the periodic assigned schedule. This allows the
- * halt to be queued when the periodic schedule is
- * processed.
- */
- list_move(&chan->qh->qh_list_entry,
- &hsotg->periodic_sched_assigned);
-
- /*
- * Make sure the Periodic Tx FIFO Empty interrupt is
- * enabled so that the periodic schedule will be
- * processed
- */
- gintmsk = readl(hsotg->regs + GINTMSK);
- gintmsk |= GINTSTS_PTXFEMP;
- writel(gintmsk, hsotg->regs + GINTMSK);
- }
- }
-}
-
-/*
- * Performs common cleanup for non-periodic transfers after a Transfer
- * Complete interrupt. This function should be called after any endpoint type
- * specific handling is finished to release the host channel.
- */
-static void dwc2_complete_non_periodic_xfer(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan,
- int chnum, struct dwc2_qtd *qtd,
- enum dwc2_halt_status halt_status)
-{
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- qtd->error_count = 0;
-
- if (chan->hcint & HCINTMSK_NYET) {
- /*
- * Got a NYET on the last transaction of the transfer. This
- * means that the endpoint should be in the PING state at the
- * beginning of the next transfer.
- */
- dev_vdbg(hsotg->dev, "got NYET\n");
- chan->qh->ping_state = 1;
- }
-
- /*
- * Always halt and release the host channel to make it available for
- * more transfers. There may still be more phases for a control
- * transfer or more data packets for a bulk transfer at this point,
- * but the host channel is still halted. A channel will be reassigned
- * to the transfer when the non-periodic schedule is processed after
- * the channel is released. This allows transactions to be queued
- * properly via dwc2_hcd_queue_transactions, which also enables the
- * Tx FIFO Empty interrupt if necessary.
- */
- if (chan->ep_is_in) {
- /*
- * IN transfers in Slave mode require an explicit disable to
- * halt the channel. (In DMA mode, this call simply releases
- * the channel.)
- */
- dwc2_halt_channel(hsotg, chan, qtd, halt_status);
- } else {
- /*
- * The channel is automatically disabled by the core for OUT
- * transfers in Slave mode
- */
- dwc2_release_channel(hsotg, chan, qtd, halt_status);
- }
-}
-
-/*
- * Performs common cleanup for periodic transfers after a Transfer Complete
- * interrupt. This function should be called after any endpoint type specific
- * handling is finished to release the host channel.
- */
-static void dwc2_complete_periodic_xfer(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd,
- enum dwc2_halt_status halt_status)
-{
- u32 hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
-
- qtd->error_count = 0;
-
- if (!chan->ep_is_in || (hctsiz & TSIZ_PKTCNT_MASK) == 0)
- /* Core halts channel in these cases */
- dwc2_release_channel(hsotg, chan, qtd, halt_status);
- else
- /* Flush any outstanding requests from the Tx queue */
- dwc2_halt_channel(hsotg, chan, qtd, halt_status);
-}
-
-static int dwc2_xfercomp_isoc_split_in(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- struct dwc2_hcd_iso_packet_desc *frame_desc;
- u32 len;
-
- if (!qtd->urb)
- return 0;
-
- frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
- len = dwc2_get_actual_xfer_length(hsotg, chan, chnum, qtd,
- DWC2_HC_XFER_COMPLETE, NULL);
- if (!len) {
- qtd->complete_split = 0;
- qtd->isoc_split_offset = 0;
- return 0;
- }
-
- frame_desc->actual_length += len;
-
- if (chan->align_buf) {
- dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
- dma_sync_single_for_cpu(hsotg->dev, qtd->urb->dma,
- qtd->urb->length, DMA_FROM_DEVICE);
- memcpy(qtd->urb->buf + frame_desc->offset +
- qtd->isoc_split_offset, chan->qh->dw_align_buf, len);
- dma_sync_single_for_device(hsotg->dev, qtd->urb->dma,
- qtd->urb->length, DMA_FROM_DEVICE);
- }
-
- qtd->isoc_split_offset += len;
-
- if (frame_desc->actual_length >= frame_desc->length) {
- frame_desc->status = 0;
- qtd->isoc_frame_index++;
- qtd->complete_split = 0;
- qtd->isoc_split_offset = 0;
- }
-
- if (qtd->isoc_frame_index == qtd->urb->packet_count) {
- dwc2_host_complete(hsotg, qtd, 0);
- dwc2_release_channel(hsotg, chan, qtd,
- DWC2_HC_XFER_URB_COMPLETE);
- } else {
- dwc2_release_channel(hsotg, chan, qtd,
- DWC2_HC_XFER_NO_HALT_STATUS);
- }
-
- return 1; /* Indicates that channel released */
-}
-
-/*
- * Handles a host channel Transfer Complete interrupt. This handler may be
- * called in either DMA mode or Slave mode.
- */
-static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- struct dwc2_hcd_urb *urb = qtd->urb;
- int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
- enum dwc2_halt_status halt_status = DWC2_HC_XFER_COMPLETE;
- int urb_xfer_done;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev,
- "--Host Channel %d Interrupt: Transfer Complete--\n",
- chnum);
-
- if (hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, halt_status);
- if (pipe_type == USB_ENDPOINT_XFER_ISOC)
- /* Do not disable the interrupt, just clear it */
- return;
- goto handle_xfercomp_done;
- }
-
- /* Handle xfer complete on CSPLIT */
- if (chan->qh->do_split) {
- if (chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in &&
- hsotg->core_params->dma_enable > 0) {
- if (qtd->complete_split &&
- dwc2_xfercomp_isoc_split_in(hsotg, chan, chnum,
- qtd))
- goto handle_xfercomp_done;
- } else {
- qtd->complete_split = 0;
- }
- }
-
- if (!urb)
- goto handle_xfercomp_done;
-
- /* Update the QTD and URB states */
- switch (pipe_type) {
- case USB_ENDPOINT_XFER_CONTROL:
- switch (qtd->control_phase) {
- case DWC2_CONTROL_SETUP:
- if (urb->length > 0)
- qtd->control_phase = DWC2_CONTROL_DATA;
- else
- qtd->control_phase = DWC2_CONTROL_STATUS;
- dev_vdbg(hsotg->dev,
- " Control setup transaction done\n");
- halt_status = DWC2_HC_XFER_COMPLETE;
- break;
- case DWC2_CONTROL_DATA:
- urb_xfer_done = dwc2_update_urb_state(hsotg, chan,
- chnum, urb, qtd);
- if (urb_xfer_done) {
- qtd->control_phase = DWC2_CONTROL_STATUS;
- dev_vdbg(hsotg->dev,
- " Control data transfer done\n");
- } else {
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum,
- qtd);
- }
- halt_status = DWC2_HC_XFER_COMPLETE;
- break;
- case DWC2_CONTROL_STATUS:
- dev_vdbg(hsotg->dev, " Control transfer complete\n");
- if (urb->status == -EINPROGRESS)
- urb->status = 0;
- dwc2_host_complete(hsotg, qtd, urb->status);
- halt_status = DWC2_HC_XFER_URB_COMPLETE;
- break;
- }
-
- dwc2_complete_non_periodic_xfer(hsotg, chan, chnum, qtd,
- halt_status);
- break;
- case USB_ENDPOINT_XFER_BULK:
- dev_vdbg(hsotg->dev, " Bulk transfer complete\n");
- urb_xfer_done = dwc2_update_urb_state(hsotg, chan, chnum, urb,
- qtd);
- if (urb_xfer_done) {
- dwc2_host_complete(hsotg, qtd, urb->status);
- halt_status = DWC2_HC_XFER_URB_COMPLETE;
- } else {
- halt_status = DWC2_HC_XFER_COMPLETE;
- }
-
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
- dwc2_complete_non_periodic_xfer(hsotg, chan, chnum, qtd,
- halt_status);
- break;
- case USB_ENDPOINT_XFER_INT:
- dev_vdbg(hsotg->dev, " Interrupt transfer complete\n");
- urb_xfer_done = dwc2_update_urb_state(hsotg, chan, chnum, urb,
- qtd);
-
- /*
- * Interrupt URB is done on the first transfer complete
- * interrupt
- */
- if (urb_xfer_done) {
- dwc2_host_complete(hsotg, qtd, urb->status);
- halt_status = DWC2_HC_XFER_URB_COMPLETE;
- } else {
- halt_status = DWC2_HC_XFER_COMPLETE;
- }
-
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
- dwc2_complete_periodic_xfer(hsotg, chan, chnum, qtd,
- halt_status);
- break;
- case USB_ENDPOINT_XFER_ISOC:
- if (dbg_perio())
- dev_vdbg(hsotg->dev, " Isochronous transfer complete\n");
- if (qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_ALL)
- halt_status = dwc2_update_isoc_urb_state(hsotg, chan,
- chnum, qtd, DWC2_HC_XFER_COMPLETE);
- dwc2_complete_periodic_xfer(hsotg, chan, chnum, qtd,
- halt_status);
- break;
- }
-
-handle_xfercomp_done:
- disable_hc_int(hsotg, chnum, HCINTMSK_XFERCOMPL);
-}
-
-/*
- * Handles a host channel STALL interrupt. This handler may be called in
- * either DMA mode or Slave mode.
- */
-static void dwc2_hc_stall_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- struct dwc2_hcd_urb *urb = qtd->urb;
- int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
-
- dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: STALL Received--\n",
- chnum);
-
- if (hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
- DWC2_HC_XFER_STALL);
- goto handle_stall_done;
- }
-
- if (!urb)
- goto handle_stall_halt;
-
- if (pipe_type == USB_ENDPOINT_XFER_CONTROL)
- dwc2_host_complete(hsotg, qtd, -EPIPE);
-
- if (pipe_type == USB_ENDPOINT_XFER_BULK ||
- pipe_type == USB_ENDPOINT_XFER_INT) {
- dwc2_host_complete(hsotg, qtd, -EPIPE);
- /*
- * USB protocol requires resetting the data toggle for bulk
- * and interrupt endpoints when a CLEAR_FEATURE(ENDPOINT_HALT)
- * setup command is issued to the endpoint. Anticipate the
- * CLEAR_FEATURE command since a STALL has occurred and reset
- * the data toggle now.
- */
- chan->qh->data_toggle = 0;
- }
-
-handle_stall_halt:
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_STALL);
-
-handle_stall_done:
- disable_hc_int(hsotg, chnum, HCINTMSK_STALL);
-}
-
-/*
- * Updates the state of the URB when a transfer has been stopped due to an
- * abnormal condition before the transfer completes. Modifies the
- * actual_length field of the URB to reflect the number of bytes that have
- * actually been transferred via the host channel.
- */
-static void dwc2_update_urb_state_abn(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_hcd_urb *urb,
- struct dwc2_qtd *qtd,
- enum dwc2_halt_status halt_status)
-{
- u32 xfer_length = dwc2_get_actual_xfer_length(hsotg, chan, chnum,
- qtd, halt_status, NULL);
- u32 hctsiz;
-
- if (urb->actual_length + xfer_length > urb->length) {
- dev_warn(hsotg->dev, "%s(): trimming xfer length\n", __func__);
- xfer_length = urb->length - urb->actual_length;
- }
-
- /* Non DWORD-aligned buffer case handling */
- if (chan->align_buf && xfer_length && chan->ep_is_in) {
- dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
- dma_sync_single_for_cpu(hsotg->dev, urb->dma, urb->length,
- DMA_FROM_DEVICE);
- memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf,
- xfer_length);
- dma_sync_single_for_device(hsotg->dev, urb->dma, urb->length,
- DMA_FROM_DEVICE);
- }
-
- urb->actual_length += xfer_length;
-
- hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
- dev_vdbg(hsotg->dev, "DWC_otg: %s: %s, channel %d\n",
- __func__, (chan->ep_is_in ? "IN" : "OUT"), chnum);
- dev_vdbg(hsotg->dev, " chan->start_pkt_count %d\n",
- chan->start_pkt_count);
- dev_vdbg(hsotg->dev, " hctsiz.pktcnt %d\n",
- (hctsiz & TSIZ_PKTCNT_MASK) >> TSIZ_PKTCNT_SHIFT);
- dev_vdbg(hsotg->dev, " chan->max_packet %d\n", chan->max_packet);
- dev_vdbg(hsotg->dev, " bytes_transferred %d\n",
- xfer_length);
- dev_vdbg(hsotg->dev, " urb->actual_length %d\n",
- urb->actual_length);
- dev_vdbg(hsotg->dev, " urb->transfer_buffer_length %d\n",
- urb->length);
-}
-
-/*
- * Handles a host channel NAK interrupt. This handler may be called in either
- * DMA mode or Slave mode.
- */
-static void dwc2_hc_nak_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NAK Received--\n",
- chnum);
-
- /*
- * Handle NAK for IN/OUT SSPLIT/CSPLIT transfers, bulk, control, and
- * interrupt. Re-start the SSPLIT transfer.
- */
- if (chan->do_split) {
- if (chan->complete_split)
- qtd->error_count = 0;
- qtd->complete_split = 0;
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK);
- goto handle_nak_done;
- }
-
- switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
- case USB_ENDPOINT_XFER_CONTROL:
- case USB_ENDPOINT_XFER_BULK:
- if (hsotg->core_params->dma_enable > 0 && chan->ep_is_in) {
- /*
- * NAK interrupts are enabled on bulk/control IN
- * transfers in DMA mode for the sole purpose of
- * resetting the error count after a transaction error
- * occurs. The core will continue transferring data.
- */
- qtd->error_count = 0;
- break;
- }
-
- /*
- * NAK interrupts normally occur during OUT transfers in DMA
- * or Slave mode. For IN transfers, more requests will be
- * queued as request queue space is available.
- */
- qtd->error_count = 0;
-
- if (!chan->qh->ping_state) {
- dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb,
- qtd, DWC2_HC_XFER_NAK);
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
-
- if (chan->speed == USB_SPEED_HIGH)
- chan->qh->ping_state = 1;
- }
-
- /*
- * Halt the channel so the transfer can be re-started from
- * the appropriate point or the PING protocol will
- * start/continue
- */
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK);
- break;
- case USB_ENDPOINT_XFER_INT:
- qtd->error_count = 0;
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK);
- break;
- case USB_ENDPOINT_XFER_ISOC:
- /* Should never get called for isochronous transfers */
- dev_err(hsotg->dev, "NACK interrupt for ISOC transfer\n");
- break;
- }
-
-handle_nak_done:
- disable_hc_int(hsotg, chnum, HCINTMSK_NAK);
-}
-
-/*
- * Handles a host channel ACK interrupt. This interrupt is enabled when
- * performing the PING protocol in Slave mode, when errors occur during
- * either Slave mode or DMA mode, and during Start Split transactions.
- */
-static void dwc2_hc_ack_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- struct dwc2_hcd_iso_packet_desc *frame_desc;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: ACK Received--\n",
- chnum);
-
- if (chan->do_split) {
- /* Handle ACK on SSPLIT. ACK should not occur in CSPLIT. */
- if (!chan->ep_is_in &&
- chan->data_pid_start != DWC2_HC_PID_SETUP)
- qtd->ssplit_out_xfer_count = chan->xfer_len;
-
- if (chan->ep_type != USB_ENDPOINT_XFER_ISOC || chan->ep_is_in) {
- qtd->complete_split = 1;
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_ACK);
- } else {
- /* ISOC OUT */
- switch (chan->xact_pos) {
- case DWC2_HCSPLT_XACTPOS_ALL:
- break;
- case DWC2_HCSPLT_XACTPOS_END:
- qtd->isoc_split_pos = DWC2_HCSPLT_XACTPOS_ALL;
- qtd->isoc_split_offset = 0;
- break;
- case DWC2_HCSPLT_XACTPOS_BEGIN:
- case DWC2_HCSPLT_XACTPOS_MID:
- /*
- * For BEGIN or MID, calculate the length for
- * the next microframe to determine the correct
- * SSPLIT token, either MID or END
- */
- frame_desc = &qtd->urb->iso_descs[
- qtd->isoc_frame_index];
- qtd->isoc_split_offset += 188;
-
- if (frame_desc->length - qtd->isoc_split_offset
- <= 188)
- qtd->isoc_split_pos =
- DWC2_HCSPLT_XACTPOS_END;
- else
- qtd->isoc_split_pos =
- DWC2_HCSPLT_XACTPOS_MID;
- break;
- }
- }
- } else {
- qtd->error_count = 0;
-
- if (chan->qh->ping_state) {
- chan->qh->ping_state = 0;
- /*
- * Halt the channel so the transfer can be re-started
- * from the appropriate point. This only happens in
- * Slave mode. In DMA mode, the ping_state is cleared
- * when the transfer is started because the core
- * automatically executes the PING, then the transfer.
- */
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_ACK);
- }
- }
-
- /*
- * If the ACK occurred when _not_ in the PING state, let the channel
- * continue transferring data after clearing the error count
- */
- disable_hc_int(hsotg, chnum, HCINTMSK_ACK);
-}
-
-/*
- * Handles a host channel NYET interrupt. This interrupt should only occur on
- * Bulk and Control OUT endpoints and for complete split transactions. If a
- * NYET occurs at the same time as a Transfer Complete interrupt, it is
- * handled in the xfercomp interrupt handler, not here. This handler may be
- * called in either DMA mode or Slave mode.
- */
-static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NYET Received--\n",
- chnum);
-
- /*
- * NYET on CSPLIT
- * re-do the CSPLIT immediately on non-periodic
- */
- if (chan->do_split && chan->complete_split) {
- if (chan->ep_is_in && chan->ep_type == USB_ENDPOINT_XFER_ISOC &&
- hsotg->core_params->dma_enable > 0) {
- qtd->complete_split = 0;
- qtd->isoc_split_offset = 0;
- qtd->isoc_frame_index++;
- if (qtd->urb &&
- qtd->isoc_frame_index == qtd->urb->packet_count) {
- dwc2_host_complete(hsotg, qtd, 0);
- dwc2_release_channel(hsotg, chan, qtd,
- DWC2_HC_XFER_URB_COMPLETE);
- } else {
- dwc2_release_channel(hsotg, chan, qtd,
- DWC2_HC_XFER_NO_HALT_STATUS);
- }
- goto handle_nyet_done;
- }
-
- if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
- int frnum = dwc2_hcd_get_frame_number(hsotg);
-
- if (dwc2_full_frame_num(frnum) !=
- dwc2_full_frame_num(chan->qh->sched_frame)) {
- /*
- * No longer in the same full speed frame.
- * Treat this as a transaction error.
- */
-#if 0
- /*
- * Todo: Fix system performance so this can
- * be treated as an error. Right now complete
- * splits cannot be scheduled precisely enough
- * due to other system activity, so this error
- * occurs regularly in Slave mode.
- */
- qtd->error_count++;
-#endif
- qtd->complete_split = 0;
- dwc2_halt_channel(hsotg, chan, qtd,
- DWC2_HC_XFER_XACT_ERR);
- /* Todo: add support for isoc release */
- goto handle_nyet_done;
- }
- }
-
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NYET);
- goto handle_nyet_done;
- }
-
- chan->qh->ping_state = 1;
- qtd->error_count = 0;
-
- dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb, qtd,
- DWC2_HC_XFER_NYET);
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
-
- /*
- * Halt the channel and re-start the transfer so the PING protocol
- * will start
- */
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NYET);
-
-handle_nyet_done:
- disable_hc_int(hsotg, chnum, HCINTMSK_NYET);
-}
-
-/*
- * Handles a host channel babble interrupt. This handler may be called in
- * either DMA mode or Slave mode.
- */
-static void dwc2_hc_babble_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: Babble Error--\n",
- chnum);
-
- dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
-
- if (hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
- DWC2_HC_XFER_BABBLE_ERR);
- goto disable_int;
- }
-
- if (chan->ep_type != USB_ENDPOINT_XFER_ISOC) {
- dwc2_host_complete(hsotg, qtd, -EOVERFLOW);
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_BABBLE_ERR);
- } else {
- enum dwc2_halt_status halt_status;
-
- halt_status = dwc2_update_isoc_urb_state(hsotg, chan, chnum,
- qtd, DWC2_HC_XFER_BABBLE_ERR);
- dwc2_halt_channel(hsotg, chan, qtd, halt_status);
- }
-
-disable_int:
- disable_hc_int(hsotg, chnum, HCINTMSK_BBLERR);
-}
-
-/*
- * Handles a host channel AHB error interrupt. This handler is only called in
- * DMA mode.
- */
-static void dwc2_hc_ahberr_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- struct dwc2_hcd_urb *urb = qtd->urb;
- char *pipetype, *speed;
- u32 hcchar;
- u32 hcsplt;
- u32 hctsiz;
- u32 hc_dma;
-
- dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: AHB Error--\n",
- chnum);
-
- if (!urb)
- goto handle_ahberr_halt;
-
- dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
-
- hcchar = readl(hsotg->regs + HCCHAR(chnum));
- hcsplt = readl(hsotg->regs + HCSPLT(chnum));
- hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
- hc_dma = readl(hsotg->regs + HCDMA(chnum));
-
- dev_err(hsotg->dev, "AHB ERROR, Channel %d\n", chnum);
- dev_err(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n", hcchar, hcsplt);
- dev_err(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n", hctsiz, hc_dma);
- dev_err(hsotg->dev, " Device address: %d\n",
- dwc2_hcd_get_dev_addr(&urb->pipe_info));
- dev_err(hsotg->dev, " Endpoint: %d, %s\n",
- dwc2_hcd_get_ep_num(&urb->pipe_info),
- dwc2_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT");
-
- switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) {
- case USB_ENDPOINT_XFER_CONTROL:
- pipetype = "CONTROL";
- break;
- case USB_ENDPOINT_XFER_BULK:
- pipetype = "BULK";
- break;
- case USB_ENDPOINT_XFER_INT:
- pipetype = "INTERRUPT";
- break;
- case USB_ENDPOINT_XFER_ISOC:
- pipetype = "ISOCHRONOUS";
- break;
- default:
- pipetype = "UNKNOWN";
- break;
- }
-
- dev_err(hsotg->dev, " Endpoint type: %s\n", pipetype);
-
- switch (chan->speed) {
- case USB_SPEED_HIGH:
- speed = "HIGH";
- break;
- case USB_SPEED_FULL:
- speed = "FULL";
- break;
- case USB_SPEED_LOW:
- speed = "LOW";
- break;
- default:
- speed = "UNKNOWN";
- break;
- }
-
- dev_err(hsotg->dev, " Speed: %s\n", speed);
-
- dev_err(hsotg->dev, " Max packet size: %d\n",
- dwc2_hcd_get_mps(&urb->pipe_info));
- dev_err(hsotg->dev, " Data buffer length: %d\n", urb->length);
- dev_err(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n",
- urb->buf, (unsigned long)urb->dma);
- dev_err(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n",
- urb->setup_packet, (unsigned long)urb->setup_dma);
- dev_err(hsotg->dev, " Interval: %d\n", urb->interval);
-
- /* Core halts the channel for Descriptor DMA mode */
- if (hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
- DWC2_HC_XFER_AHB_ERR);
- goto handle_ahberr_done;
- }
-
- dwc2_host_complete(hsotg, qtd, -EIO);
-
-handle_ahberr_halt:
- /*
- * Force a channel halt. Don't call dwc2_halt_channel because that won't
- * write to the HCCHARn register in DMA mode to force the halt.
- */
- dwc2_hc_halt(hsotg, chan, DWC2_HC_XFER_AHB_ERR);
-
-handle_ahberr_done:
- disable_hc_int(hsotg, chnum, HCINTMSK_AHBERR);
-}
-
-/*
- * Handles a host channel transaction error interrupt. This handler may be
- * called in either DMA mode or Slave mode.
- */
-static void dwc2_hc_xacterr_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- dev_dbg(hsotg->dev,
- "--Host Channel %d Interrupt: Transaction Error--\n", chnum);
-
- dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
-
- if (hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
- DWC2_HC_XFER_XACT_ERR);
- goto handle_xacterr_done;
- }
-
- switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
- case USB_ENDPOINT_XFER_CONTROL:
- case USB_ENDPOINT_XFER_BULK:
- qtd->error_count++;
- if (!chan->qh->ping_state) {
-
- dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb,
- qtd, DWC2_HC_XFER_XACT_ERR);
- dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
- if (!chan->ep_is_in && chan->speed == USB_SPEED_HIGH)
- chan->qh->ping_state = 1;
- }
-
- /*
- * Halt the channel so the transfer can be re-started from
- * the appropriate point or the PING protocol will start
- */
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_XACT_ERR);
- break;
- case USB_ENDPOINT_XFER_INT:
- qtd->error_count++;
- if (chan->do_split && chan->complete_split)
- qtd->complete_split = 0;
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_XACT_ERR);
- break;
- case USB_ENDPOINT_XFER_ISOC:
- {
- enum dwc2_halt_status halt_status;
-
- halt_status = dwc2_update_isoc_urb_state(hsotg, chan,
- chnum, qtd, DWC2_HC_XFER_XACT_ERR);
- dwc2_halt_channel(hsotg, chan, qtd, halt_status);
- }
- break;
- }
-
-handle_xacterr_done:
- disable_hc_int(hsotg, chnum, HCINTMSK_XACTERR);
-}
-
-/*
- * Handles a host channel frame overrun interrupt. This handler may be called
- * in either DMA mode or Slave mode.
- */
-static void dwc2_hc_frmovrun_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- enum dwc2_halt_status halt_status;
-
- if (dbg_hc(chan))
- dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: Frame Overrun--\n",
- chnum);
-
- dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
-
- switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
- case USB_ENDPOINT_XFER_CONTROL:
- case USB_ENDPOINT_XFER_BULK:
- break;
- case USB_ENDPOINT_XFER_INT:
- dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_FRAME_OVERRUN);
- break;
- case USB_ENDPOINT_XFER_ISOC:
- halt_status = dwc2_update_isoc_urb_state(hsotg, chan, chnum,
- qtd, DWC2_HC_XFER_FRAME_OVERRUN);
- dwc2_halt_channel(hsotg, chan, qtd, halt_status);
- break;
- }
-
- disable_hc_int(hsotg, chnum, HCINTMSK_FRMOVRUN);
-}
-
-/*
- * Handles a host channel data toggle error interrupt. This handler may be
- * called in either DMA mode or Slave mode.
- */
-static void dwc2_hc_datatglerr_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- dev_dbg(hsotg->dev,
- "--Host Channel %d Interrupt: Data Toggle Error--\n", chnum);
-
- if (chan->ep_is_in)
- qtd->error_count = 0;
- else
- dev_err(hsotg->dev,
- "Data Toggle Error on OUT transfer, channel %d\n",
- chnum);
-
- dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
- disable_hc_int(hsotg, chnum, HCINTMSK_DATATGLERR);
-}
-
-/*
- * For debug only. It checks that a valid halt status is set and that
- * HCCHARn.chdis is clear. If there's a problem, corrective action is
- * taken and a warning is issued.
- *
- * Return: true if halt status is ok, false otherwise
- */
-static bool dwc2_halt_status_ok(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
-#ifdef DEBUG
- u32 hcchar;
- u32 hctsiz;
- u32 hcintmsk;
- u32 hcsplt;
-
- if (chan->halt_status == DWC2_HC_XFER_NO_HALT_STATUS) {
- /*
- * This code is here only as a check. This condition should
- * never happen. Ignore the halt if it does occur.
- */
- hcchar = readl(hsotg->regs + HCCHAR(chnum));
- hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
- hcintmsk = readl(hsotg->regs + HCINTMSK(chnum));
- hcsplt = readl(hsotg->regs + HCSPLT(chnum));
- dev_dbg(hsotg->dev,
- "%s: chan->halt_status DWC2_HC_XFER_NO_HALT_STATUS,\n",
- __func__);
- dev_dbg(hsotg->dev,
- "channel %d, hcchar 0x%08x, hctsiz 0x%08x,\n",
- chnum, hcchar, hctsiz);
- dev_dbg(hsotg->dev,
- "hcint 0x%08x, hcintmsk 0x%08x, hcsplt 0x%08x,\n",
- chan->hcint, hcintmsk, hcsplt);
- if (qtd)
- dev_dbg(hsotg->dev, "qtd->complete_split %d\n",
- qtd->complete_split);
- dev_warn(hsotg->dev,
- "%s: no halt status, channel %d, ignoring interrupt\n",
- __func__, chnum);
- return false;
- }
-
- /*
- * This code is here only as a check. hcchar.chdis should never be set
- * when the halt interrupt occurs. Halt the channel again if it does
- * occur.
- */
- hcchar = readl(hsotg->regs + HCCHAR(chnum));
- if (hcchar & HCCHAR_CHDIS) {
- dev_warn(hsotg->dev,
- "%s: hcchar.chdis set unexpectedly, hcchar 0x%08x, trying to halt again\n",
- __func__, hcchar);
- chan->halt_pending = 0;
- dwc2_halt_channel(hsotg, chan, qtd, chan->halt_status);
- return false;
- }
-#endif
-
- return true;
-}
-
-/*
- * Handles a host Channel Halted interrupt in DMA mode. This handler
- * determines the reason the channel halted and proceeds accordingly.
- */
-static void dwc2_hc_chhltd_intr_dma(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- u32 hcintmsk;
- int out_nak_enh = 0;
-
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev,
- "--Host Channel %d Interrupt: DMA Channel Halted--\n",
- chnum);
-
- /*
- * For core with OUT NAK enhancement, the flow for high-speed
- * CONTROL/BULK OUT is handled a little differently
- */
- if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_71a) {
- if (chan->speed == USB_SPEED_HIGH && !chan->ep_is_in &&
- (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
- chan->ep_type == USB_ENDPOINT_XFER_BULK)) {
- out_nak_enh = 1;
- }
- }
-
- if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE ||
- (chan->halt_status == DWC2_HC_XFER_AHB_ERR &&
- hsotg->core_params->dma_desc_enable <= 0)) {
- if (hsotg->core_params->dma_desc_enable > 0)
- dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
- chan->halt_status);
- else
- /*
- * Just release the channel. A dequeue can happen on a
- * transfer timeout. In the case of an AHB Error, the
- * channel was forced to halt because there's no way to
- * gracefully recover.
- */
- dwc2_release_channel(hsotg, chan, qtd,
- chan->halt_status);
- return;
- }
-
- hcintmsk = readl(hsotg->regs + HCINTMSK(chnum));
-
- if (chan->hcint & HCINTMSK_XFERCOMPL) {
- /*
- * Todo: This is here because of a possible hardware bug. Spec
- * says that on SPLIT-ISOC OUT transfers in DMA mode that a HALT
- * interrupt w/ACK bit set should occur, but I only see the
- * XFERCOMP bit, even with it masked out. This is a workaround
- * for that behavior. Should fix this when hardware is fixed.
- */
- if (chan->ep_type == USB_ENDPOINT_XFER_ISOC && !chan->ep_is_in)
- dwc2_hc_ack_intr(hsotg, chan, chnum, qtd);
- dwc2_hc_xfercomp_intr(hsotg, chan, chnum, qtd);
- } else if (chan->hcint & HCINTMSK_STALL) {
- dwc2_hc_stall_intr(hsotg, chan, chnum, qtd);
- } else if ((chan->hcint & HCINTMSK_XACTERR) &&
- hsotg->core_params->dma_desc_enable <= 0) {
- if (out_nak_enh) {
- if (chan->hcint &
- (HCINTMSK_NYET | HCINTMSK_NAK | HCINTMSK_ACK)) {
- dev_vdbg(hsotg->dev,
- "XactErr with NYET/NAK/ACK\n");
- qtd->error_count = 0;
- } else {
- dev_vdbg(hsotg->dev,
- "XactErr without NYET/NAK/ACK\n");
- }
- }
-
- /*
- * Must handle xacterr before nak or ack. Could get a xacterr
- * at the same time as either of these on a BULK/CONTROL OUT
- * that started with a PING. The xacterr takes precedence.
- */
- dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
- } else if ((chan->hcint & HCINTMSK_XCS_XACT) &&
- hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
- } else if ((chan->hcint & HCINTMSK_AHBERR) &&
- hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hc_ahberr_intr(hsotg, chan, chnum, qtd);
- } else if (chan->hcint & HCINTMSK_BBLERR) {
- dwc2_hc_babble_intr(hsotg, chan, chnum, qtd);
- } else if (chan->hcint & HCINTMSK_FRMOVRUN) {
- dwc2_hc_frmovrun_intr(hsotg, chan, chnum, qtd);
- } else if (!out_nak_enh) {
- if (chan->hcint & HCINTMSK_NYET) {
- /*
- * Must handle nyet before nak or ack. Could get a nyet
- * at the same time as either of those on a BULK/CONTROL
- * OUT that started with a PING. The nyet takes
- * precedence.
- */
- dwc2_hc_nyet_intr(hsotg, chan, chnum, qtd);
- } else if ((chan->hcint & HCINTMSK_NAK) &&
- !(hcintmsk & HCINTMSK_NAK)) {
- /*
- * If nak is not masked, it's because a non-split IN
- * transfer is in an error state. In that case, the nak
- * is handled by the nak interrupt handler, not here.
- * Handle nak here for BULK/CONTROL OUT transfers, which
- * halt on a NAK to allow rewinding the buffer pointer.
- */
- dwc2_hc_nak_intr(hsotg, chan, chnum, qtd);
- } else if ((chan->hcint & HCINTMSK_ACK) &&
- !(hcintmsk & HCINTMSK_ACK)) {
- /*
- * If ack is not masked, it's because a non-split IN
- * transfer is in an error state. In that case, the ack
- * is handled by the ack interrupt handler, not here.
- * Handle ack here for split transfers. Start splits
- * halt on ACK.
- */
- dwc2_hc_ack_intr(hsotg, chan, chnum, qtd);
- } else {
- if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
- chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
- /*
- * A periodic transfer halted with no other
- * channel interrupts set. Assume it was halted
- * by the core because it could not be completed
- * in its scheduled (micro)frame.
- */
- dev_dbg(hsotg->dev,
- "%s: Halt channel %d (assume incomplete periodic transfer)\n",
- __func__, chnum);
- dwc2_halt_channel(hsotg, chan, qtd,
- DWC2_HC_XFER_PERIODIC_INCOMPLETE);
- } else {
- dev_err(hsotg->dev,
- "%s: Channel %d - ChHltd set, but reason is unknown\n",
- __func__, chnum);
- dev_err(hsotg->dev,
- "hcint 0x%08x, intsts 0x%08x\n",
- chan->hcint,
- readl(hsotg->regs + GINTSTS));
- }
- }
- } else {
- dev_info(hsotg->dev,
- "NYET/NAK/ACK/other in non-error case, 0x%08x\n",
- chan->hcint);
- }
-}
-
-/*
- * Handles a host channel Channel Halted interrupt
- *
- * In slave mode, this handler is called only when the driver specifically
- * requests a halt. This occurs during handling other host channel interrupts
- * (e.g. nak, xacterr, stall, nyet, etc.).
- *
- * In DMA mode, this is the interrupt that occurs when the core has finished
- * processing a transfer on a channel. Other host channel interrupts (except
- * ahberr) are disabled in DMA mode.
- */
-static void dwc2_hc_chhltd_intr(struct dwc2_hsotg *hsotg,
- struct dwc2_host_chan *chan, int chnum,
- struct dwc2_qtd *qtd)
-{
- if (dbg_hc(chan))
- dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: Channel Halted--\n",
- chnum);
-
- if (hsotg->core_params->dma_enable > 0) {
- dwc2_hc_chhltd_intr_dma(hsotg, chan, chnum, qtd);
- } else {
- if (!dwc2_halt_status_ok(hsotg, chan, chnum, qtd))
- return;
- dwc2_release_channel(hsotg, chan, qtd, chan->halt_status);
- }
-}
-
-/* Handles interrupt for a specific Host Channel */
-static void dwc2_hc_n_intr(struct dwc2_hsotg *hsotg, int chnum)
-{
- struct dwc2_qtd *qtd;
- struct dwc2_host_chan *chan;
- u32 hcint, hcintmsk;
-
- chan = hsotg->hc_ptr_array[chnum];
-
- hcint = readl(hsotg->regs + HCINT(chnum));
- hcintmsk = readl(hsotg->regs + HCINTMSK(chnum));
- if (!chan) {
- dev_err(hsotg->dev, "## hc_ptr_array for channel is NULL ##\n");
- writel(hcint, hsotg->regs + HCINT(chnum));
- return;
- }
-
- if (dbg_hc(chan)) {
- dev_vdbg(hsotg->dev, "--Host Channel Interrupt--, Channel %d\n",
- chnum);
- dev_vdbg(hsotg->dev,
- " hcint 0x%08x, hcintmsk 0x%08x, hcint&hcintmsk 0x%08x\n",
- hcint, hcintmsk, hcint & hcintmsk);
- }
-
- writel(hcint, hsotg->regs + HCINT(chnum));
- chan->hcint = hcint;
- hcint &= hcintmsk;
-
- /*
- * If the channel was halted due to a dequeue, the qtd list might
- * be empty or at least the first entry will not be the active qtd.
- * In this case, take a shortcut and just release the channel.
- */
- if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) {
- /*
- * If the channel was halted, this should be the only
- * interrupt unmasked
- */
- WARN_ON(hcint != HCINTMSK_CHHLTD);
- if (hsotg->core_params->dma_desc_enable > 0)
- dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
- chan->halt_status);
- else
- dwc2_release_channel(hsotg, chan, NULL,
- chan->halt_status);
- return;
- }
-
- if (list_empty(&chan->qh->qtd_list)) {
- /*
- * TODO: Will this ever happen with the
- * DWC2_HC_XFER_URB_DEQUEUE handling above?
- */
- dev_dbg(hsotg->dev, "## no QTD queued for channel %d ##\n",
- chnum);
- dev_dbg(hsotg->dev,
- " hcint 0x%08x, hcintmsk 0x%08x, hcint&hcintmsk 0x%08x\n",
- chan->hcint, hcintmsk, hcint);
- chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS;
- disable_hc_int(hsotg, chnum, HCINTMSK_CHHLTD);
- chan->hcint = 0;
- return;
- }
-
- qtd = list_first_entry(&chan->qh->qtd_list, struct dwc2_qtd,
- qtd_list_entry);
-
- if (hsotg->core_params->dma_enable <= 0) {
- if ((hcint & HCINTMSK_CHHLTD) && hcint != HCINTMSK_CHHLTD)
- hcint &= ~HCINTMSK_CHHLTD;
- }
-
- if (hcint & HCINTMSK_XFERCOMPL) {
- dwc2_hc_xfercomp_intr(hsotg, chan, chnum, qtd);
- /*
- * If NYET occurred at same time as Xfer Complete, the NYET is
- * handled by the Xfer Complete interrupt handler. Don't want
- * to call the NYET interrupt handler in this case.
- */
- hcint &= ~HCINTMSK_NYET;
- }
- if (hcint & HCINTMSK_CHHLTD)
- dwc2_hc_chhltd_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_AHBERR)
- dwc2_hc_ahberr_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_STALL)
- dwc2_hc_stall_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_NAK)
- dwc2_hc_nak_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_ACK)
- dwc2_hc_ack_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_NYET)
- dwc2_hc_nyet_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_XACTERR)
- dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_BBLERR)
- dwc2_hc_babble_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_FRMOVRUN)
- dwc2_hc_frmovrun_intr(hsotg, chan, chnum, qtd);
- if (hcint & HCINTMSK_DATATGLERR)
- dwc2_hc_datatglerr_intr(hsotg, chan, chnum, qtd);
-
- chan->hcint = 0;
-}
-
-/*
- * This interrupt indicates that one or more host channels has a pending
- * interrupt. There are multiple conditions that can cause each host channel
- * interrupt. This function determines which conditions have occurred for each
- * host channel interrupt and handles them appropriately.
- */
-static void dwc2_hc_intr(struct dwc2_hsotg *hsotg)
-{
- u32 haint;
- int i;
-
- haint = readl(hsotg->regs + HAINT);
- if (dbg_perio()) {
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- dev_vdbg(hsotg->dev, "HAINT=%08x\n", haint);
- }
-
- for (i = 0; i < hsotg->core_params->host_channels; i++) {
- if (haint & (1 << i))
- dwc2_hc_n_intr(hsotg, i);
- }
-}
-
-/* This function handles interrupts for the HCD */
-irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg)
-{
- u32 gintsts, dbg_gintsts;
- irqreturn_t retval = IRQ_NONE;
-
- if (!dwc2_is_controller_alive(hsotg)) {
- dev_warn(hsotg->dev, "Controller is dead\n");
- return retval;
- }
-
- spin_lock(&hsotg->lock);
-
- /* Check if HOST Mode */
- if (dwc2_is_host_mode(hsotg)) {
- gintsts = dwc2_read_core_intr(hsotg);
- if (!gintsts) {
- spin_unlock(&hsotg->lock);
- return retval;
- }
-
- retval = IRQ_HANDLED;
-
- dbg_gintsts = gintsts;
-#ifndef DEBUG_SOF
- dbg_gintsts &= ~GINTSTS_SOF;
-#endif
- if (!dbg_perio())
- dbg_gintsts &= ~(GINTSTS_HCHINT | GINTSTS_RXFLVL |
- GINTSTS_PTXFEMP);
-
- /* Only print if there are any non-suppressed interrupts left */
- if (dbg_gintsts)
- dev_vdbg(hsotg->dev,
- "DWC OTG HCD Interrupt Detected gintsts&gintmsk=0x%08x\n",
- gintsts);
-
- if (gintsts & GINTSTS_SOF)
- dwc2_sof_intr(hsotg);
- if (gintsts & GINTSTS_RXFLVL)
- dwc2_rx_fifo_level_intr(hsotg);
- if (gintsts & GINTSTS_NPTXFEMP)
- dwc2_np_tx_fifo_empty_intr(hsotg);
- if (gintsts & GINTSTS_PRTINT)
- dwc2_port_intr(hsotg);
- if (gintsts & GINTSTS_HCHINT)
- dwc2_hc_intr(hsotg);
- if (gintsts & GINTSTS_PTXFEMP)
- dwc2_perio_tx_fifo_empty_intr(hsotg);
-
- if (dbg_gintsts) {
- dev_vdbg(hsotg->dev,
- "DWC OTG HCD Finished Servicing Interrupts\n");
- dev_vdbg(hsotg->dev,
- "DWC OTG HCD gintsts=0x%08x gintmsk=0x%08x\n",
- readl(hsotg->regs + GINTSTS),
- readl(hsotg->regs + GINTMSK));
- }
- }
-
- spin_unlock(&hsotg->lock);
-
- return retval;
-}
+++ /dev/null
-/*
- * hcd_queue.c - DesignWare HS OTG Controller host queuing routines
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * This file contains the functions to manage Queue Heads and Queue
- * Transfer Descriptors for Host mode
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-
-#include <linux/usb/hcd.h>
-#include <linux/usb/ch11.h>
-
-#include "core.h"
-#include "hcd.h"
-
-/**
- * dwc2_qh_init() - Initializes a QH structure
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: The QH to init
- * @urb: Holds the information about the device/endpoint needed to initialize
- * the QH
- */
-#define SCHEDULE_SLOP 10
-static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- struct dwc2_hcd_urb *urb)
-{
- int dev_speed, hub_addr, hub_port;
- char *speed, *type;
-
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- /* Initialize QH */
- qh->ep_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
- qh->ep_is_in = dwc2_hcd_is_pipe_in(&urb->pipe_info) ? 1 : 0;
-
- qh->data_toggle = DWC2_HC_PID_DATA0;
- qh->maxp = dwc2_hcd_get_mps(&urb->pipe_info);
- INIT_LIST_HEAD(&qh->qtd_list);
- INIT_LIST_HEAD(&qh->qh_list_entry);
-
- /* FS/LS Endpoint on HS Hub, NOT virtual root hub */
- dev_speed = dwc2_host_get_speed(hsotg, urb->priv);
-
- dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port);
-
- if ((dev_speed == USB_SPEED_LOW || dev_speed == USB_SPEED_FULL) &&
- hub_addr != 0 && hub_addr != 1) {
- dev_vdbg(hsotg->dev,
- "QH init: EP %d: TT found at hub addr %d, for port %d\n",
- dwc2_hcd_get_ep_num(&urb->pipe_info), hub_addr,
- hub_port);
- qh->do_split = 1;
- }
-
- if (qh->ep_type == USB_ENDPOINT_XFER_INT ||
- qh->ep_type == USB_ENDPOINT_XFER_ISOC) {
- /* Compute scheduling parameters once and save them */
- u32 hprt, prtspd;
-
- /* Todo: Account for split transfers in the bus time */
- int bytecount =
- dwc2_hb_mult(qh->maxp) * dwc2_max_packet(qh->maxp);
-
- qh->usecs = NS_TO_US(usb_calc_bus_time(qh->do_split ?
- USB_SPEED_HIGH : dev_speed, qh->ep_is_in,
- qh->ep_type == USB_ENDPOINT_XFER_ISOC,
- bytecount));
- /* Start in a slightly future (micro)frame */
- qh->sched_frame = dwc2_frame_num_inc(hsotg->frame_number,
- SCHEDULE_SLOP);
- qh->interval = urb->interval;
-#if 0
- /* Increase interrupt polling rate for debugging */
- if (qh->ep_type == USB_ENDPOINT_XFER_INT)
- qh->interval = 8;
-#endif
- hprt = readl(hsotg->regs + HPRT0);
- prtspd = (hprt & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
- if (prtspd == HPRT0_SPD_HIGH_SPEED &&
- (dev_speed == USB_SPEED_LOW ||
- dev_speed == USB_SPEED_FULL)) {
- qh->interval *= 8;
- qh->sched_frame |= 0x7;
- qh->start_split_frame = qh->sched_frame;
- }
- dev_dbg(hsotg->dev, "interval=%d\n", qh->interval);
- }
-
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH Initialized\n");
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH - qh = %p\n", qh);
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Device Address = %d\n",
- dwc2_hcd_get_dev_addr(&urb->pipe_info));
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Endpoint %d, %s\n",
- dwc2_hcd_get_ep_num(&urb->pipe_info),
- dwc2_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT");
-
- qh->dev_speed = dev_speed;
-
- switch (dev_speed) {
- case USB_SPEED_LOW:
- speed = "low";
- break;
- case USB_SPEED_FULL:
- speed = "full";
- break;
- case USB_SPEED_HIGH:
- speed = "high";
- break;
- default:
- speed = "?";
- break;
- }
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Speed = %s\n", speed);
-
- switch (qh->ep_type) {
- case USB_ENDPOINT_XFER_ISOC:
- type = "isochronous";
- break;
- case USB_ENDPOINT_XFER_INT:
- type = "interrupt";
- break;
- case USB_ENDPOINT_XFER_CONTROL:
- type = "control";
- break;
- case USB_ENDPOINT_XFER_BULK:
- type = "bulk";
- break;
- default:
- type = "?";
- break;
- }
-
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Type = %s\n", type);
-
- if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH - usecs = %d\n",
- qh->usecs);
- dev_vdbg(hsotg->dev, "DWC OTG HCD QH - interval = %d\n",
- qh->interval);
- }
-}
-
-/**
- * dwc2_hcd_qh_create() - Allocates and initializes a QH
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @urb: Holds the information about the device/endpoint needed
- * to initialize the QH
- * @atomic_alloc: Flag to do atomic allocation if needed
- *
- * Return: Pointer to the newly allocated QH, or NULL on error
- */
-static struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg,
- struct dwc2_hcd_urb *urb,
- gfp_t mem_flags)
-{
- struct dwc2_qh *qh;
-
- if (!urb->priv)
- return NULL;
-
- /* Allocate memory */
- qh = kzalloc(sizeof(*qh), mem_flags);
- if (!qh)
- return NULL;
-
- dwc2_qh_init(hsotg, qh, urb);
-
- if (hsotg->core_params->dma_desc_enable > 0 &&
- dwc2_hcd_qh_init_ddma(hsotg, qh, mem_flags) < 0) {
- dwc2_hcd_qh_free(hsotg, qh);
- return NULL;
- }
-
- return qh;
-}
-
-/**
- * dwc2_hcd_qh_free() - Frees the QH
- *
- * @hsotg: HCD instance
- * @qh: The QH to free
- *
- * QH should already be removed from the list. QTD list should already be empty
- * if called from URB Dequeue.
- *
- * Must NOT be called with interrupt disabled or spinlock held
- */
-void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- u32 buf_size;
-
- if (hsotg->core_params->dma_desc_enable > 0) {
- dwc2_hcd_qh_free_ddma(hsotg, qh);
- } else if (qh->dw_align_buf) {
- if (qh->ep_type == USB_ENDPOINT_XFER_ISOC)
- buf_size = 4096;
- else
- buf_size = hsotg->core_params->max_transfer_size;
- dma_free_coherent(hsotg->dev, buf_size, qh->dw_align_buf,
- qh->dw_align_buf_dma);
- }
-
- kfree(qh);
-}
-
-/**
- * dwc2_periodic_channel_available() - Checks that a channel is available for a
- * periodic transfer
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- *
- * Return: 0 if successful, negative error code otherwise
- */
-static int dwc2_periodic_channel_available(struct dwc2_hsotg *hsotg)
-{
- /*
- * Currently assuming that there is a dedicated host channel for
- * each periodic transaction plus at least one host channel for
- * non-periodic transactions
- */
- int status;
- int num_channels;
-
- num_channels = hsotg->core_params->host_channels;
- if (hsotg->periodic_channels + hsotg->non_periodic_channels <
- num_channels
- && hsotg->periodic_channels < num_channels - 1) {
- status = 0;
- } else {
- dev_dbg(hsotg->dev,
- "%s: Total channels: %d, Periodic: %d, "
- "Non-periodic: %d\n", __func__, num_channels,
- hsotg->periodic_channels, hsotg->non_periodic_channels);
- status = -ENOSPC;
- }
-
- return status;
-}
-
-/**
- * dwc2_check_periodic_bandwidth() - Checks that there is sufficient bandwidth
- * for the specified QH in the periodic schedule
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: QH containing periodic bandwidth required
- *
- * Return: 0 if successful, negative error code otherwise
- *
- * For simplicity, this calculation assumes that all the transfers in the
- * periodic schedule may occur in the same (micro)frame
- */
-static int dwc2_check_periodic_bandwidth(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh)
-{
- int status;
- s16 max_claimed_usecs;
-
- status = 0;
-
- if (qh->dev_speed == USB_SPEED_HIGH || qh->do_split) {
- /*
- * High speed mode
- * Max periodic usecs is 80% x 125 usec = 100 usec
- */
- max_claimed_usecs = 100 - qh->usecs;
- } else {
- /*
- * Full speed mode
- * Max periodic usecs is 90% x 1000 usec = 900 usec
- */
- max_claimed_usecs = 900 - qh->usecs;
- }
-
- if (hsotg->periodic_usecs > max_claimed_usecs) {
- dev_err(hsotg->dev,
- "%s: already claimed usecs %d, required usecs %d\n",
- __func__, hsotg->periodic_usecs, qh->usecs);
- status = -ENOSPC;
- }
-
- return status;
-}
-
-/**
- * Microframe scheduler
- * track the total use in hsotg->frame_usecs
- * keep each qh use in qh->frame_usecs
- * when surrendering the qh then donate the time back
- */
-static const unsigned short max_uframe_usecs[] = {
- 100, 100, 100, 100, 100, 100, 30, 0
-};
-
-void dwc2_hcd_init_usecs(struct dwc2_hsotg *hsotg)
-{
- int i;
-
- for (i = 0; i < 8; i++)
- hsotg->frame_usecs[i] = max_uframe_usecs[i];
-}
-
-static int dwc2_find_single_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- unsigned short utime = qh->usecs;
- int i;
-
- for (i = 0; i < 8; i++) {
- /* At the start hsotg->frame_usecs[i] = max_uframe_usecs[i] */
- if (utime <= hsotg->frame_usecs[i]) {
- hsotg->frame_usecs[i] -= utime;
- qh->frame_usecs[i] += utime;
- return i;
- }
- }
- return -ENOSPC;
-}
-
-/*
- * use this for FS apps that can span multiple uframes
- */
-static int dwc2_find_multi_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- unsigned short utime = qh->usecs;
- unsigned short xtime;
- int t_left;
- int i;
- int j;
- int k;
-
- for (i = 0; i < 8; i++) {
- if (hsotg->frame_usecs[i] <= 0)
- continue;
-
- /*
- * we need n consecutive slots so use j as a start slot
- * j plus j+1 must be enough time (for now)
- */
- xtime = hsotg->frame_usecs[i];
- for (j = i + 1; j < 8; j++) {
- /*
- * if we add this frame remaining time to xtime we may
- * be OK, if not we need to test j for a complete frame
- */
- if (xtime + hsotg->frame_usecs[j] < utime) {
- if (hsotg->frame_usecs[j] <
- max_uframe_usecs[j])
- continue;
- }
- if (xtime >= utime) {
- t_left = utime;
- for (k = i; k < 8; k++) {
- t_left -= hsotg->frame_usecs[k];
- if (t_left <= 0) {
- qh->frame_usecs[k] +=
- hsotg->frame_usecs[k]
- + t_left;
- hsotg->frame_usecs[k] = -t_left;
- return i;
- } else {
- qh->frame_usecs[k] +=
- hsotg->frame_usecs[k];
- hsotg->frame_usecs[k] = 0;
- }
- }
- }
- /* add the frame time to x time */
- xtime += hsotg->frame_usecs[j];
- /* we must have a fully available next frame or break */
- if (xtime < utime &&
- hsotg->frame_usecs[j] == max_uframe_usecs[j])
- continue;
- }
- }
- return -ENOSPC;
-}
-
-static int dwc2_find_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- int ret;
-
- if (qh->dev_speed == USB_SPEED_HIGH) {
- /* if this is a hs transaction we need a full frame */
- ret = dwc2_find_single_uframe(hsotg, qh);
- } else {
- /*
- * if this is a fs transaction we may need a sequence
- * of frames
- */
- ret = dwc2_find_multi_uframe(hsotg, qh);
- }
- return ret;
-}
-
-/**
- * dwc2_check_max_xfer_size() - Checks that the max transfer size allowed in a
- * host channel is large enough to handle the maximum data transfer in a single
- * (micro)frame for a periodic transfer
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: QH for a periodic endpoint
- *
- * Return: 0 if successful, negative error code otherwise
- */
-static int dwc2_check_max_xfer_size(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh)
-{
- u32 max_xfer_size;
- u32 max_channel_xfer_size;
- int status = 0;
-
- max_xfer_size = dwc2_max_packet(qh->maxp) * dwc2_hb_mult(qh->maxp);
- max_channel_xfer_size = hsotg->core_params->max_transfer_size;
-
- if (max_xfer_size > max_channel_xfer_size) {
- dev_err(hsotg->dev,
- "%s: Periodic xfer length %d > max xfer length for channel %d\n",
- __func__, max_xfer_size, max_channel_xfer_size);
- status = -ENOSPC;
- }
-
- return status;
-}
-
-/**
- * dwc2_schedule_periodic() - Schedules an interrupt or isochronous transfer in
- * the periodic schedule
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: QH for the periodic transfer. The QH should already contain the
- * scheduling information.
- *
- * Return: 0 if successful, negative error code otherwise
- */
-static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- int status;
-
- if (hsotg->core_params->uframe_sched > 0) {
- int frame = -1;
-
- status = dwc2_find_uframe(hsotg, qh);
- if (status == 0)
- frame = 7;
- else if (status > 0)
- frame = status - 1;
-
- /* Set the new frame up */
- if (frame >= 0) {
- qh->sched_frame &= ~0x7;
- qh->sched_frame |= (frame & 7);
- }
-
- if (status > 0)
- status = 0;
- } else {
- status = dwc2_periodic_channel_available(hsotg);
- if (status) {
- dev_info(hsotg->dev,
- "%s: No host channel available for periodic transfer\n",
- __func__);
- return status;
- }
-
- status = dwc2_check_periodic_bandwidth(hsotg, qh);
- }
-
- if (status) {
- dev_dbg(hsotg->dev,
- "%s: Insufficient periodic bandwidth for periodic transfer\n",
- __func__);
- return status;
- }
-
- status = dwc2_check_max_xfer_size(hsotg, qh);
- if (status) {
- dev_dbg(hsotg->dev,
- "%s: Channel max transfer size too small for periodic transfer\n",
- __func__);
- return status;
- }
-
- if (hsotg->core_params->dma_desc_enable > 0)
- /* Don't rely on SOF and start in ready schedule */
- list_add_tail(&qh->qh_list_entry, &hsotg->periodic_sched_ready);
- else
- /* Always start in inactive schedule */
- list_add_tail(&qh->qh_list_entry,
- &hsotg->periodic_sched_inactive);
-
- if (hsotg->core_params->uframe_sched <= 0)
- /* Reserve periodic channel */
- hsotg->periodic_channels++;
-
- /* Update claimed usecs per (micro)frame */
- hsotg->periodic_usecs += qh->usecs;
-
- return status;
-}
-
-/**
- * dwc2_deschedule_periodic() - Removes an interrupt or isochronous transfer
- * from the periodic schedule
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: QH for the periodic transfer
- */
-static void dwc2_deschedule_periodic(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh)
-{
- int i;
-
- list_del_init(&qh->qh_list_entry);
-
- /* Update claimed usecs per (micro)frame */
- hsotg->periodic_usecs -= qh->usecs;
-
- if (hsotg->core_params->uframe_sched > 0) {
- for (i = 0; i < 8; i++) {
- hsotg->frame_usecs[i] += qh->frame_usecs[i];
- qh->frame_usecs[i] = 0;
- }
- } else {
- /* Release periodic channel reservation */
- hsotg->periodic_channels--;
- }
-}
-
-/**
- * dwc2_hcd_qh_add() - Adds a QH to either the non periodic or periodic
- * schedule if it is not already in the schedule. If the QH is already in
- * the schedule, no action is taken.
- *
- * @hsotg: The HCD state structure for the DWC OTG controller
- * @qh: The QH to add
- *
- * Return: 0 if successful, negative error code otherwise
- */
-int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- int status;
- u32 intr_mask;
-
- if (dbg_qh(qh))
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- if (!list_empty(&qh->qh_list_entry))
- /* QH already in a schedule */
- return 0;
-
- /* Add the new QH to the appropriate schedule */
- if (dwc2_qh_is_non_per(qh)) {
- /* Always start in inactive schedule */
- list_add_tail(&qh->qh_list_entry,
- &hsotg->non_periodic_sched_inactive);
- return 0;
- }
-
- status = dwc2_schedule_periodic(hsotg, qh);
- if (status)
- return status;
- if (!hsotg->periodic_qh_count) {
- intr_mask = readl(hsotg->regs + GINTMSK);
- intr_mask |= GINTSTS_SOF;
- writel(intr_mask, hsotg->regs + GINTMSK);
- }
- hsotg->periodic_qh_count++;
-
- return 0;
-}
-
-/**
- * dwc2_hcd_qh_unlink() - Removes a QH from either the non-periodic or periodic
- * schedule. Memory is not freed.
- *
- * @hsotg: The HCD state structure
- * @qh: QH to remove from schedule
- */
-void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
-{
- u32 intr_mask;
-
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- if (list_empty(&qh->qh_list_entry))
- /* QH is not in a schedule */
- return;
-
- if (dwc2_qh_is_non_per(qh)) {
- if (hsotg->non_periodic_qh_ptr == &qh->qh_list_entry)
- hsotg->non_periodic_qh_ptr =
- hsotg->non_periodic_qh_ptr->next;
- list_del_init(&qh->qh_list_entry);
- return;
- }
-
- dwc2_deschedule_periodic(hsotg, qh);
- hsotg->periodic_qh_count--;
- if (!hsotg->periodic_qh_count) {
- intr_mask = readl(hsotg->regs + GINTMSK);
- intr_mask &= ~GINTSTS_SOF;
- writel(intr_mask, hsotg->regs + GINTMSK);
- }
-}
-
-/*
- * Schedule the next continuing periodic split transfer
- */
-static void dwc2_sched_periodic_split(struct dwc2_hsotg *hsotg,
- struct dwc2_qh *qh, u16 frame_number,
- int sched_next_periodic_split)
-{
- u16 incr;
-
- if (sched_next_periodic_split) {
- qh->sched_frame = frame_number;
- incr = dwc2_frame_num_inc(qh->start_split_frame, 1);
- if (dwc2_frame_num_le(frame_number, incr)) {
- /*
- * Allow one frame to elapse after start split
- * microframe before scheduling complete split, but
- * DON'T if we are doing the next start split in the
- * same frame for an ISOC out
- */
- if (qh->ep_type != USB_ENDPOINT_XFER_ISOC ||
- qh->ep_is_in != 0) {
- qh->sched_frame =
- dwc2_frame_num_inc(qh->sched_frame, 1);
- }
- }
- } else {
- qh->sched_frame = dwc2_frame_num_inc(qh->start_split_frame,
- qh->interval);
- if (dwc2_frame_num_le(qh->sched_frame, frame_number))
- qh->sched_frame = frame_number;
- qh->sched_frame |= 0x7;
- qh->start_split_frame = qh->sched_frame;
- }
-}
-
-/*
- * Deactivates a QH. For non-periodic QHs, removes the QH from the active
- * non-periodic schedule. The QH is added to the inactive non-periodic
- * schedule if any QTDs are still attached to the QH.
- *
- * For periodic QHs, the QH is removed from the periodic queued schedule. If
- * there are any QTDs still attached to the QH, the QH is added to either the
- * periodic inactive schedule or the periodic ready schedule and its next
- * scheduled frame is calculated. The QH is placed in the ready schedule if
- * the scheduled frame has been reached already. Otherwise it's placed in the
- * inactive schedule. If there are no QTDs attached to the QH, the QH is
- * completely removed from the periodic schedule.
- */
-void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
- int sched_next_periodic_split)
-{
- u16 frame_number;
-
- if (dbg_qh(qh))
- dev_vdbg(hsotg->dev, "%s()\n", __func__);
-
- if (dwc2_qh_is_non_per(qh)) {
- dwc2_hcd_qh_unlink(hsotg, qh);
- if (!list_empty(&qh->qtd_list))
- /* Add back to inactive non-periodic schedule */
- dwc2_hcd_qh_add(hsotg, qh);
- return;
- }
-
- frame_number = dwc2_hcd_get_frame_number(hsotg);
-
- if (qh->do_split) {
- dwc2_sched_periodic_split(hsotg, qh, frame_number,
- sched_next_periodic_split);
- } else {
- qh->sched_frame = dwc2_frame_num_inc(qh->sched_frame,
- qh->interval);
- if (dwc2_frame_num_le(qh->sched_frame, frame_number))
- qh->sched_frame = frame_number;
- }
-
- if (list_empty(&qh->qtd_list)) {
- dwc2_hcd_qh_unlink(hsotg, qh);
- return;
- }
- /*
- * Remove from periodic_sched_queued and move to
- * appropriate queue
- */
- if ((hsotg->core_params->uframe_sched > 0 &&
- dwc2_frame_num_le(qh->sched_frame, frame_number)) ||
- (hsotg->core_params->uframe_sched <= 0 &&
- qh->sched_frame == frame_number))
- list_move(&qh->qh_list_entry, &hsotg->periodic_sched_ready);
- else
- list_move(&qh->qh_list_entry, &hsotg->periodic_sched_inactive);
-}
-
-/**
- * dwc2_hcd_qtd_init() - Initializes a QTD structure
- *
- * @qtd: The QTD to initialize
- * @urb: The associated URB
- */
-void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb)
-{
- qtd->urb = urb;
- if (dwc2_hcd_get_pipe_type(&urb->pipe_info) ==
- USB_ENDPOINT_XFER_CONTROL) {
- /*
- * The only time the QTD data toggle is used is on the data
- * phase of control transfers. This phase always starts with
- * DATA1.
- */
- qtd->data_toggle = DWC2_HC_PID_DATA1;
- qtd->control_phase = DWC2_CONTROL_SETUP;
- }
-
- /* Start split */
- qtd->complete_split = 0;
- qtd->isoc_split_pos = DWC2_HCSPLT_XACTPOS_ALL;
- qtd->isoc_split_offset = 0;
- qtd->in_process = 0;
-
- /* Store the qtd ptr in the urb to reference the QTD */
- urb->qtd = qtd;
-}
-
-/**
- * dwc2_hcd_qtd_add() - Adds a QTD to the QTD-list of a QH
- *
- * @hsotg: The DWC HCD structure
- * @qtd: The QTD to add
- * @qh: Out parameter to return queue head
- * @atomic_alloc: Flag to do atomic alloc if needed
- *
- * Return: 0 if successful, negative error code otherwise
- *
- * Finds the correct QH to place the QTD into. If it does not find a QH, it
- * will create a new QH. If the QH to which the QTD is added is not currently
- * scheduled, it is placed into the proper schedule based on its EP type.
- */
-int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
- struct dwc2_qh **qh, gfp_t mem_flags)
-{
- struct dwc2_hcd_urb *urb = qtd->urb;
- unsigned long flags;
- int allocated = 0;
- int retval;
-
- /*
- * Get the QH which holds the QTD-list to insert to. Create QH if it
- * doesn't exist.
- */
- if (*qh == NULL) {
- *qh = dwc2_hcd_qh_create(hsotg, urb, mem_flags);
- if (*qh == NULL)
- return -ENOMEM;
- allocated = 1;
- }
-
- spin_lock_irqsave(&hsotg->lock, flags);
-
- retval = dwc2_hcd_qh_add(hsotg, *qh);
- if (retval)
- goto fail;
-
- qtd->qh = *qh;
- list_add_tail(&qtd->qtd_list_entry, &(*qh)->qtd_list);
- spin_unlock_irqrestore(&hsotg->lock, flags);
-
- return 0;
-
-fail:
- if (allocated) {
- struct dwc2_qtd *qtd2, *qtd2_tmp;
- struct dwc2_qh *qh_tmp = *qh;
-
- *qh = NULL;
- dwc2_hcd_qh_unlink(hsotg, qh_tmp);
-
- /* Free each QTD in the QH's QTD list */
- list_for_each_entry_safe(qtd2, qtd2_tmp, &qh_tmp->qtd_list,
- qtd_list_entry)
- dwc2_hcd_qtd_unlink_and_free(hsotg, qtd2, qh_tmp);
-
- spin_unlock_irqrestore(&hsotg->lock, flags);
- dwc2_hcd_qh_free(hsotg, qh_tmp);
- } else {
- spin_unlock_irqrestore(&hsotg->lock, flags);
- }
-
- return retval;
-}
+++ /dev/null
-/*
- * hw.h - DesignWare HS OTG Controller hardware definitions
- *
- * Copyright 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef __DWC2_HW_H__
-#define __DWC2_HW_H__
-
-#define HSOTG_REG(x) (x)
-
-#define GOTGCTL HSOTG_REG(0x000)
-#define GOTGCTL_CHIRPEN (1 << 27)
-#define GOTGCTL_MULT_VALID_BC_MASK (0x1f << 22)
-#define GOTGCTL_MULT_VALID_BC_SHIFT 22
-#define GOTGCTL_OTGVER (1 << 20)
-#define GOTGCTL_BSESVLD (1 << 19)
-#define GOTGCTL_ASESVLD (1 << 18)
-#define GOTGCTL_DBNC_SHORT (1 << 17)
-#define GOTGCTL_CONID_B (1 << 16)
-#define GOTGCTL_DEVHNPEN (1 << 11)
-#define GOTGCTL_HSTSETHNPEN (1 << 10)
-#define GOTGCTL_HNPREQ (1 << 9)
-#define GOTGCTL_HSTNEGSCS (1 << 8)
-#define GOTGCTL_SESREQ (1 << 1)
-#define GOTGCTL_SESREQSCS (1 << 0)
-
-#define GOTGINT HSOTG_REG(0x004)
-#define GOTGINT_DBNCE_DONE (1 << 19)
-#define GOTGINT_A_DEV_TOUT_CHG (1 << 18)
-#define GOTGINT_HST_NEG_DET (1 << 17)
-#define GOTGINT_HST_NEG_SUC_STS_CHNG (1 << 9)
-#define GOTGINT_SES_REQ_SUC_STS_CHNG (1 << 8)
-#define GOTGINT_SES_END_DET (1 << 2)
-
-#define GAHBCFG HSOTG_REG(0x008)
-#define GAHBCFG_AHB_SINGLE (1 << 23)
-#define GAHBCFG_NOTI_ALL_DMA_WRIT (1 << 22)
-#define GAHBCFG_REM_MEM_SUPP (1 << 21)
-#define GAHBCFG_P_TXF_EMP_LVL (1 << 8)
-#define GAHBCFG_NP_TXF_EMP_LVL (1 << 7)
-#define GAHBCFG_DMA_EN (1 << 5)
-#define GAHBCFG_HBSTLEN_MASK (0xf << 1)
-#define GAHBCFG_HBSTLEN_SHIFT 1
-#define GAHBCFG_HBSTLEN_SINGLE 0
-#define GAHBCFG_HBSTLEN_INCR 1
-#define GAHBCFG_HBSTLEN_INCR4 3
-#define GAHBCFG_HBSTLEN_INCR8 5
-#define GAHBCFG_HBSTLEN_INCR16 7
-#define GAHBCFG_GLBL_INTR_EN (1 << 0)
-#define GAHBCFG_CTRL_MASK (GAHBCFG_P_TXF_EMP_LVL | \
- GAHBCFG_NP_TXF_EMP_LVL | \
- GAHBCFG_DMA_EN | \
- GAHBCFG_GLBL_INTR_EN)
-
-#define GUSBCFG HSOTG_REG(0x00C)
-#define GUSBCFG_FORCEDEVMODE (1 << 30)
-#define GUSBCFG_FORCEHOSTMODE (1 << 29)
-#define GUSBCFG_TXENDDELAY (1 << 28)
-#define GUSBCFG_ICTRAFFICPULLREMOVE (1 << 27)
-#define GUSBCFG_ICUSBCAP (1 << 26)
-#define GUSBCFG_ULPI_INT_PROT_DIS (1 << 25)
-#define GUSBCFG_INDICATORPASSTHROUGH (1 << 24)
-#define GUSBCFG_INDICATORCOMPLEMENT (1 << 23)
-#define GUSBCFG_TERMSELDLPULSE (1 << 22)
-#define GUSBCFG_ULPI_INT_VBUS_IND (1 << 21)
-#define GUSBCFG_ULPI_EXT_VBUS_DRV (1 << 20)
-#define GUSBCFG_ULPI_CLK_SUSP_M (1 << 19)
-#define GUSBCFG_ULPI_AUTO_RES (1 << 18)
-#define GUSBCFG_ULPI_FS_LS (1 << 17)
-#define GUSBCFG_OTG_UTMI_FS_SEL (1 << 16)
-#define GUSBCFG_PHY_LP_CLK_SEL (1 << 15)
-#define GUSBCFG_USBTRDTIM_MASK (0xf << 10)
-#define GUSBCFG_USBTRDTIM_SHIFT 10
-#define GUSBCFG_HNPCAP (1 << 9)
-#define GUSBCFG_SRPCAP (1 << 8)
-#define GUSBCFG_DDRSEL (1 << 7)
-#define GUSBCFG_PHYSEL (1 << 6)
-#define GUSBCFG_FSINTF (1 << 5)
-#define GUSBCFG_ULPI_UTMI_SEL (1 << 4)
-#define GUSBCFG_PHYIF16 (1 << 3)
-#define GUSBCFG_TOUTCAL_MASK (0x7 << 0)
-#define GUSBCFG_TOUTCAL_SHIFT 0
-#define GUSBCFG_TOUTCAL_LIMIT 0x7
-#define GUSBCFG_TOUTCAL(_x) ((_x) << 0)
-
-#define GRSTCTL HSOTG_REG(0x010)
-#define GRSTCTL_AHBIDLE (1 << 31)
-#define GRSTCTL_DMAREQ (1 << 30)
-#define GRSTCTL_TXFNUM_MASK (0x1f << 6)
-#define GRSTCTL_TXFNUM_SHIFT 6
-#define GRSTCTL_TXFNUM_LIMIT 0x1f
-#define GRSTCTL_TXFNUM(_x) ((_x) << 6)
-#define GRSTCTL_TXFFLSH (1 << 5)
-#define GRSTCTL_RXFFLSH (1 << 4)
-#define GRSTCTL_IN_TKNQ_FLSH (1 << 3)
-#define GRSTCTL_FRMCNTRRST (1 << 2)
-#define GRSTCTL_HSFTRST (1 << 1)
-#define GRSTCTL_CSFTRST (1 << 0)
-
-#define GINTSTS HSOTG_REG(0x014)
-#define GINTMSK HSOTG_REG(0x018)
-#define GINTSTS_WKUPINT (1 << 31)
-#define GINTSTS_SESSREQINT (1 << 30)
-#define GINTSTS_DISCONNINT (1 << 29)
-#define GINTSTS_CONIDSTSCHNG (1 << 28)
-#define GINTSTS_LPMTRANRCVD (1 << 27)
-#define GINTSTS_PTXFEMP (1 << 26)
-#define GINTSTS_HCHINT (1 << 25)
-#define GINTSTS_PRTINT (1 << 24)
-#define GINTSTS_RESETDET (1 << 23)
-#define GINTSTS_FET_SUSP (1 << 22)
-#define GINTSTS_INCOMPL_IP (1 << 21)
-#define GINTSTS_INCOMPL_SOIN (1 << 20)
-#define GINTSTS_OEPINT (1 << 19)
-#define GINTSTS_IEPINT (1 << 18)
-#define GINTSTS_EPMIS (1 << 17)
-#define GINTSTS_RESTOREDONE (1 << 16)
-#define GINTSTS_EOPF (1 << 15)
-#define GINTSTS_ISOUTDROP (1 << 14)
-#define GINTSTS_ENUMDONE (1 << 13)
-#define GINTSTS_USBRST (1 << 12)
-#define GINTSTS_USBSUSP (1 << 11)
-#define GINTSTS_ERLYSUSP (1 << 10)
-#define GINTSTS_I2CINT (1 << 9)
-#define GINTSTS_ULPI_CK_INT (1 << 8)
-#define GINTSTS_GOUTNAKEFF (1 << 7)
-#define GINTSTS_GINNAKEFF (1 << 6)
-#define GINTSTS_NPTXFEMP (1 << 5)
-#define GINTSTS_RXFLVL (1 << 4)
-#define GINTSTS_SOF (1 << 3)
-#define GINTSTS_OTGINT (1 << 2)
-#define GINTSTS_MODEMIS (1 << 1)
-#define GINTSTS_CURMODE_HOST (1 << 0)
-
-#define GRXSTSR HSOTG_REG(0x01C)
-#define GRXSTSP HSOTG_REG(0x020)
-#define GRXSTS_FN_MASK (0x7f << 25)
-#define GRXSTS_FN_SHIFT 25
-#define GRXSTS_PKTSTS_MASK (0xf << 17)
-#define GRXSTS_PKTSTS_SHIFT 17
-#define GRXSTS_PKTSTS_GLOBALOUTNAK 1
-#define GRXSTS_PKTSTS_OUTRX 2
-#define GRXSTS_PKTSTS_HCHIN 2
-#define GRXSTS_PKTSTS_OUTDONE 3
-#define GRXSTS_PKTSTS_HCHIN_XFER_COMP 3
-#define GRXSTS_PKTSTS_SETUPDONE 4
-#define GRXSTS_PKTSTS_DATATOGGLEERR 5
-#define GRXSTS_PKTSTS_SETUPRX 6
-#define GRXSTS_PKTSTS_HCHHALTED 7
-#define GRXSTS_HCHNUM_MASK (0xf << 0)
-#define GRXSTS_HCHNUM_SHIFT 0
-#define GRXSTS_DPID_MASK (0x3 << 15)
-#define GRXSTS_DPID_SHIFT 15
-#define GRXSTS_BYTECNT_MASK (0x7ff << 4)
-#define GRXSTS_BYTECNT_SHIFT 4
-#define GRXSTS_EPNUM_MASK (0xf << 0)
-#define GRXSTS_EPNUM_SHIFT 0
-
-#define GRXFSIZ HSOTG_REG(0x024)
-#define GRXFSIZ_DEPTH_MASK (0xffff << 0)
-#define GRXFSIZ_DEPTH_SHIFT 0
-
-#define GNPTXFSIZ HSOTG_REG(0x028)
-/* Use FIFOSIZE_* constants to access this register */
-
-#define GNPTXSTS HSOTG_REG(0x02C)
-#define GNPTXSTS_NP_TXQ_TOP_MASK (0x7f << 24)
-#define GNPTXSTS_NP_TXQ_TOP_SHIFT 24
-#define GNPTXSTS_NP_TXQ_SPC_AVAIL_MASK (0xff << 16)
-#define GNPTXSTS_NP_TXQ_SPC_AVAIL_SHIFT 16
-#define GNPTXSTS_NP_TXQ_SPC_AVAIL_GET(_v) (((_v) >> 16) & 0xff)
-#define GNPTXSTS_NP_TXF_SPC_AVAIL_MASK (0xffff << 0)
-#define GNPTXSTS_NP_TXF_SPC_AVAIL_SHIFT 0
-#define GNPTXSTS_NP_TXF_SPC_AVAIL_GET(_v) (((_v) >> 0) & 0xffff)
-
-#define GI2CCTL HSOTG_REG(0x0030)
-#define GI2CCTL_BSYDNE (1 << 31)
-#define GI2CCTL_RW (1 << 30)
-#define GI2CCTL_I2CDATSE0 (1 << 28)
-#define GI2CCTL_I2CDEVADDR_MASK (0x3 << 26)
-#define GI2CCTL_I2CDEVADDR_SHIFT 26
-#define GI2CCTL_I2CSUSPCTL (1 << 25)
-#define GI2CCTL_ACK (1 << 24)
-#define GI2CCTL_I2CEN (1 << 23)
-#define GI2CCTL_ADDR_MASK (0x7f << 16)
-#define GI2CCTL_ADDR_SHIFT 16
-#define GI2CCTL_REGADDR_MASK (0xff << 8)
-#define GI2CCTL_REGADDR_SHIFT 8
-#define GI2CCTL_RWDATA_MASK (0xff << 0)
-#define GI2CCTL_RWDATA_SHIFT 0
-
-#define GPVNDCTL HSOTG_REG(0x0034)
-#define GGPIO HSOTG_REG(0x0038)
-#define GUID HSOTG_REG(0x003c)
-#define GSNPSID HSOTG_REG(0x0040)
-#define GHWCFG1 HSOTG_REG(0x0044)
-
-#define GHWCFG2 HSOTG_REG(0x0048)
-#define GHWCFG2_OTG_ENABLE_IC_USB (1 << 31)
-#define GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK (0x1f << 26)
-#define GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT 26
-#define GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK (0x3 << 24)
-#define GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT 24
-#define GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK (0x3 << 22)
-#define GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT 22
-#define GHWCFG2_MULTI_PROC_INT (1 << 20)
-#define GHWCFG2_DYNAMIC_FIFO (1 << 19)
-#define GHWCFG2_PERIO_EP_SUPPORTED (1 << 18)
-#define GHWCFG2_NUM_HOST_CHAN_MASK (0xf << 14)
-#define GHWCFG2_NUM_HOST_CHAN_SHIFT 14
-#define GHWCFG2_NUM_DEV_EP_MASK (0xf << 10)
-#define GHWCFG2_NUM_DEV_EP_SHIFT 10
-#define GHWCFG2_FS_PHY_TYPE_MASK (0x3 << 8)
-#define GHWCFG2_FS_PHY_TYPE_SHIFT 8
-#define GHWCFG2_FS_PHY_TYPE_NOT_SUPPORTED 0
-#define GHWCFG2_FS_PHY_TYPE_DEDICATED 1
-#define GHWCFG2_FS_PHY_TYPE_SHARED_UTMI 2
-#define GHWCFG2_FS_PHY_TYPE_SHARED_ULPI 3
-#define GHWCFG2_HS_PHY_TYPE_MASK (0x3 << 6)
-#define GHWCFG2_HS_PHY_TYPE_SHIFT 6
-#define GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED 0
-#define GHWCFG2_HS_PHY_TYPE_UTMI 1
-#define GHWCFG2_HS_PHY_TYPE_ULPI 2
-#define GHWCFG2_HS_PHY_TYPE_UTMI_ULPI 3
-#define GHWCFG2_POINT2POINT (1 << 5)
-#define GHWCFG2_ARCHITECTURE_MASK (0x3 << 3)
-#define GHWCFG2_ARCHITECTURE_SHIFT 3
-#define GHWCFG2_SLAVE_ONLY_ARCH 0
-#define GHWCFG2_EXT_DMA_ARCH 1
-#define GHWCFG2_INT_DMA_ARCH 2
-#define GHWCFG2_OP_MODE_MASK (0x7 << 0)
-#define GHWCFG2_OP_MODE_SHIFT 0
-#define GHWCFG2_OP_MODE_HNP_SRP_CAPABLE 0
-#define GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE 1
-#define GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE 2
-#define GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE 3
-#define GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE 4
-#define GHWCFG2_OP_MODE_SRP_CAPABLE_HOST 5
-#define GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST 6
-#define GHWCFG2_OP_MODE_UNDEFINED 7
-
-#define GHWCFG3 HSOTG_REG(0x004c)
-#define GHWCFG3_DFIFO_DEPTH_MASK (0xffff << 16)
-#define GHWCFG3_DFIFO_DEPTH_SHIFT 16
-#define GHWCFG3_OTG_LPM_EN (1 << 15)
-#define GHWCFG3_BC_SUPPORT (1 << 14)
-#define GHWCFG3_OTG_ENABLE_HSIC (1 << 13)
-#define GHWCFG3_ADP_SUPP (1 << 12)
-#define GHWCFG3_SYNCH_RESET_TYPE (1 << 11)
-#define GHWCFG3_OPTIONAL_FEATURES (1 << 10)
-#define GHWCFG3_VENDOR_CTRL_IF (1 << 9)
-#define GHWCFG3_I2C (1 << 8)
-#define GHWCFG3_OTG_FUNC (1 << 7)
-#define GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK (0x7 << 4)
-#define GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT 4
-#define GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK (0xf << 0)
-#define GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT 0
-
-#define GHWCFG4 HSOTG_REG(0x0050)
-#define GHWCFG4_DESC_DMA_DYN (1 << 31)
-#define GHWCFG4_DESC_DMA (1 << 30)
-#define GHWCFG4_NUM_IN_EPS_MASK (0xf << 26)
-#define GHWCFG4_NUM_IN_EPS_SHIFT 26
-#define GHWCFG4_DED_FIFO_EN (1 << 25)
-#define GHWCFG4_SESSION_END_FILT_EN (1 << 24)
-#define GHWCFG4_B_VALID_FILT_EN (1 << 23)
-#define GHWCFG4_A_VALID_FILT_EN (1 << 22)
-#define GHWCFG4_VBUS_VALID_FILT_EN (1 << 21)
-#define GHWCFG4_IDDIG_FILT_EN (1 << 20)
-#define GHWCFG4_NUM_DEV_MODE_CTRL_EP_MASK (0xf << 16)
-#define GHWCFG4_NUM_DEV_MODE_CTRL_EP_SHIFT 16
-#define GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK (0x3 << 14)
-#define GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT 14
-#define GHWCFG4_UTMI_PHY_DATA_WIDTH_8 0
-#define GHWCFG4_UTMI_PHY_DATA_WIDTH_16 1
-#define GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16 2
-#define GHWCFG4_XHIBER (1 << 7)
-#define GHWCFG4_HIBER (1 << 6)
-#define GHWCFG4_MIN_AHB_FREQ (1 << 5)
-#define GHWCFG4_POWER_OPTIMIZ (1 << 4)
-#define GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK (0xf << 0)
-#define GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT 0
-
-#define GLPMCFG HSOTG_REG(0x0054)
-#define GLPMCFG_INV_SEL_HSIC (1 << 31)
-#define GLPMCFG_HSIC_CONNECT (1 << 30)
-#define GLPMCFG_RETRY_COUNT_STS_MASK (0x7 << 25)
-#define GLPMCFG_RETRY_COUNT_STS_SHIFT 25
-#define GLPMCFG_SEND_LPM (1 << 24)
-#define GLPMCFG_RETRY_COUNT_MASK (0x7 << 21)
-#define GLPMCFG_RETRY_COUNT_SHIFT 21
-#define GLPMCFG_LPM_CHAN_INDEX_MASK (0xf << 17)
-#define GLPMCFG_LPM_CHAN_INDEX_SHIFT 17
-#define GLPMCFG_SLEEP_STATE_RESUMEOK (1 << 16)
-#define GLPMCFG_PRT_SLEEP_STS (1 << 15)
-#define GLPMCFG_LPM_RESP_MASK (0x3 << 13)
-#define GLPMCFG_LPM_RESP_SHIFT 13
-#define GLPMCFG_HIRD_THRES_MASK (0x1f << 8)
-#define GLPMCFG_HIRD_THRES_SHIFT 8
-#define GLPMCFG_HIRD_THRES_EN (0x10 << 8)
-#define GLPMCFG_EN_UTMI_SLEEP (1 << 7)
-#define GLPMCFG_REM_WKUP_EN (1 << 6)
-#define GLPMCFG_HIRD_MASK (0xf << 2)
-#define GLPMCFG_HIRD_SHIFT 2
-#define GLPMCFG_APPL_RESP (1 << 1)
-#define GLPMCFG_LPM_CAP_EN (1 << 0)
-
-#define GPWRDN HSOTG_REG(0x0058)
-#define GPWRDN_MULT_VAL_ID_BC_MASK (0x1f << 24)
-#define GPWRDN_MULT_VAL_ID_BC_SHIFT 24
-#define GPWRDN_ADP_INT (1 << 23)
-#define GPWRDN_BSESSVLD (1 << 22)
-#define GPWRDN_IDSTS (1 << 21)
-#define GPWRDN_LINESTATE_MASK (0x3 << 19)
-#define GPWRDN_LINESTATE_SHIFT 19
-#define GPWRDN_STS_CHGINT_MSK (1 << 18)
-#define GPWRDN_STS_CHGINT (1 << 17)
-#define GPWRDN_SRP_DET_MSK (1 << 16)
-#define GPWRDN_SRP_DET (1 << 15)
-#define GPWRDN_CONNECT_DET_MSK (1 << 14)
-#define GPWRDN_CONNECT_DET (1 << 13)
-#define GPWRDN_DISCONN_DET_MSK (1 << 12)
-#define GPWRDN_DISCONN_DET (1 << 11)
-#define GPWRDN_RST_DET_MSK (1 << 10)
-#define GPWRDN_RST_DET (1 << 9)
-#define GPWRDN_LNSTSCHG_MSK (1 << 8)
-#define GPWRDN_LNSTSCHG (1 << 7)
-#define GPWRDN_DIS_VBUS (1 << 6)
-#define GPWRDN_PWRDNSWTCH (1 << 5)
-#define GPWRDN_PWRDNRSTN (1 << 4)
-#define GPWRDN_PWRDNCLMP (1 << 3)
-#define GPWRDN_RESTORE (1 << 2)
-#define GPWRDN_PMUACTV (1 << 1)
-#define GPWRDN_PMUINTSEL (1 << 0)
-
-#define GDFIFOCFG HSOTG_REG(0x005c)
-#define GDFIFOCFG_EPINFOBASE_MASK (0xffff << 16)
-#define GDFIFOCFG_EPINFOBASE_SHIFT 16
-#define GDFIFOCFG_GDFIFOCFG_MASK (0xffff << 0)
-#define GDFIFOCFG_GDFIFOCFG_SHIFT 0
-
-#define ADPCTL HSOTG_REG(0x0060)
-#define ADPCTL_AR_MASK (0x3 << 27)
-#define ADPCTL_AR_SHIFT 27
-#define ADPCTL_ADP_TMOUT_INT_MSK (1 << 26)
-#define ADPCTL_ADP_SNS_INT_MSK (1 << 25)
-#define ADPCTL_ADP_PRB_INT_MSK (1 << 24)
-#define ADPCTL_ADP_TMOUT_INT (1 << 23)
-#define ADPCTL_ADP_SNS_INT (1 << 22)
-#define ADPCTL_ADP_PRB_INT (1 << 21)
-#define ADPCTL_ADPENA (1 << 20)
-#define ADPCTL_ADPRES (1 << 19)
-#define ADPCTL_ENASNS (1 << 18)
-#define ADPCTL_ENAPRB (1 << 17)
-#define ADPCTL_RTIM_MASK (0x7ff << 6)
-#define ADPCTL_RTIM_SHIFT 6
-#define ADPCTL_PRB_PER_MASK (0x3 << 4)
-#define ADPCTL_PRB_PER_SHIFT 4
-#define ADPCTL_PRB_DELTA_MASK (0x3 << 2)
-#define ADPCTL_PRB_DELTA_SHIFT 2
-#define ADPCTL_PRB_DSCHRG_MASK (0x3 << 0)
-#define ADPCTL_PRB_DSCHRG_SHIFT 0
-
-#define HPTXFSIZ HSOTG_REG(0x100)
-/* Use FIFOSIZE_* constants to access this register */
-
-#define DPTXFSIZN(_a) HSOTG_REG(0x104 + (((_a) - 1) * 4))
-/* Use FIFOSIZE_* constants to access this register */
-
-/* These apply to the GNPTXFSIZ, HPTXFSIZ and DPTXFSIZN registers */
-#define FIFOSIZE_DEPTH_MASK (0xffff << 16)
-#define FIFOSIZE_DEPTH_SHIFT 16
-#define FIFOSIZE_STARTADDR_MASK (0xffff << 0)
-#define FIFOSIZE_STARTADDR_SHIFT 0
-
-/* Device mode registers */
-
-#define DCFG HSOTG_REG(0x800)
-#define DCFG_EPMISCNT_MASK (0x1f << 18)
-#define DCFG_EPMISCNT_SHIFT 18
-#define DCFG_EPMISCNT_LIMIT 0x1f
-#define DCFG_EPMISCNT(_x) ((_x) << 18)
-#define DCFG_PERFRINT_MASK (0x3 << 11)
-#define DCFG_PERFRINT_SHIFT 11
-#define DCFG_PERFRINT_LIMIT 0x3
-#define DCFG_PERFRINT(_x) ((_x) << 11)
-#define DCFG_DEVADDR_MASK (0x7f << 4)
-#define DCFG_DEVADDR_SHIFT 4
-#define DCFG_DEVADDR_LIMIT 0x7f
-#define DCFG_DEVADDR(_x) ((_x) << 4)
-#define DCFG_NZ_STS_OUT_HSHK (1 << 2)
-#define DCFG_DEVSPD_MASK (0x3 << 0)
-#define DCFG_DEVSPD_SHIFT 0
-#define DCFG_DEVSPD_HS 0
-#define DCFG_DEVSPD_FS 1
-#define DCFG_DEVSPD_LS 2
-#define DCFG_DEVSPD_FS48 3
-
-#define DCTL HSOTG_REG(0x804)
-#define DCTL_PWRONPRGDONE (1 << 11)
-#define DCTL_CGOUTNAK (1 << 10)
-#define DCTL_SGOUTNAK (1 << 9)
-#define DCTL_CGNPINNAK (1 << 8)
-#define DCTL_SGNPINNAK (1 << 7)
-#define DCTL_TSTCTL_MASK (0x7 << 4)
-#define DCTL_TSTCTL_SHIFT 4
-#define DCTL_GOUTNAKSTS (1 << 3)
-#define DCTL_GNPINNAKSTS (1 << 2)
-#define DCTL_SFTDISCON (1 << 1)
-#define DCTL_RMTWKUPSIG (1 << 0)
-
-#define DSTS HSOTG_REG(0x808)
-#define DSTS_SOFFN_MASK (0x3fff << 8)
-#define DSTS_SOFFN_SHIFT 8
-#define DSTS_SOFFN_LIMIT 0x3fff
-#define DSTS_SOFFN(_x) ((_x) << 8)
-#define DSTS_ERRATICERR (1 << 3)
-#define DSTS_ENUMSPD_MASK (0x3 << 1)
-#define DSTS_ENUMSPD_SHIFT 1
-#define DSTS_ENUMSPD_HS 0
-#define DSTS_ENUMSPD_FS 1
-#define DSTS_ENUMSPD_LS 2
-#define DSTS_ENUMSPD_FS48 3
-#define DSTS_SUSPSTS (1 << 0)
-
-#define DIEPMSK HSOTG_REG(0x810)
-#define DIEPMSK_TXFIFOEMPTY (1 << 7)
-#define DIEPMSK_INEPNAKEFFMSK (1 << 6)
-#define DIEPMSK_INTKNEPMISMSK (1 << 5)
-#define DIEPMSK_INTKNTXFEMPMSK (1 << 4)
-#define DIEPMSK_TIMEOUTMSK (1 << 3)
-#define DIEPMSK_AHBERRMSK (1 << 2)
-#define DIEPMSK_EPDISBLDMSK (1 << 1)
-#define DIEPMSK_XFERCOMPLMSK (1 << 0)
-
-#define DOEPMSK HSOTG_REG(0x814)
-#define DOEPMSK_BACK2BACKSETUP (1 << 6)
-#define DOEPMSK_OUTTKNEPDISMSK (1 << 4)
-#define DOEPMSK_SETUPMSK (1 << 3)
-#define DOEPMSK_AHBERRMSK (1 << 2)
-#define DOEPMSK_EPDISBLDMSK (1 << 1)
-#define DOEPMSK_XFERCOMPLMSK (1 << 0)
-
-#define DAINT HSOTG_REG(0x818)
-#define DAINTMSK HSOTG_REG(0x81C)
-#define DAINT_OUTEP_SHIFT 16
-#define DAINT_OUTEP(_x) (1 << ((_x) + 16))
-#define DAINT_INEP(_x) (1 << (_x))
-
-#define DTKNQR1 HSOTG_REG(0x820)
-#define DTKNQR2 HSOTG_REG(0x824)
-#define DTKNQR3 HSOTG_REG(0x830)
-#define DTKNQR4 HSOTG_REG(0x834)
-
-#define DVBUSDIS HSOTG_REG(0x828)
-#define DVBUSPULSE HSOTG_REG(0x82C)
-
-#define DIEPCTL0 HSOTG_REG(0x900)
-#define DIEPCTL(_a) HSOTG_REG(0x900 + ((_a) * 0x20))
-
-#define DOEPCTL0 HSOTG_REG(0xB00)
-#define DOEPCTL(_a) HSOTG_REG(0xB00 + ((_a) * 0x20))
-
-/* EP0 specialness:
- * bits[29..28] - reserved (no SetD0PID, SetD1PID)
- * bits[25..22] - should always be zero, this isn't a periodic endpoint
- * bits[10..0] - MPS setting different for EP0
- */
-#define D0EPCTL_MPS_MASK (0x3 << 0)
-#define D0EPCTL_MPS_SHIFT 0
-#define D0EPCTL_MPS_64 0
-#define D0EPCTL_MPS_32 1
-#define D0EPCTL_MPS_16 2
-#define D0EPCTL_MPS_8 3
-
-#define DXEPCTL_EPENA (1 << 31)
-#define DXEPCTL_EPDIS (1 << 30)
-#define DXEPCTL_SETD1PID (1 << 29)
-#define DXEPCTL_SETODDFR (1 << 29)
-#define DXEPCTL_SETD0PID (1 << 28)
-#define DXEPCTL_SETEVENFR (1 << 28)
-#define DXEPCTL_SNAK (1 << 27)
-#define DXEPCTL_CNAK (1 << 26)
-#define DXEPCTL_TXFNUM_MASK (0xf << 22)
-#define DXEPCTL_TXFNUM_SHIFT 22
-#define DXEPCTL_TXFNUM_LIMIT 0xf
-#define DXEPCTL_TXFNUM(_x) ((_x) << 22)
-#define DXEPCTL_STALL (1 << 21)
-#define DXEPCTL_SNP (1 << 20)
-#define DXEPCTL_EPTYPE_MASK (0x3 << 18)
-#define DXEPCTL_EPTYPE_SHIFT 18
-#define DXEPCTL_EPTYPE_CONTROL 0
-#define DXEPCTL_EPTYPE_ISO 1
-#define DXEPCTL_EPTYPE_BULK 2
-#define DXEPCTL_EPTYPE_INTTERUPT 3
-#define DXEPCTL_NAKSTS (1 << 17)
-#define DXEPCTL_DPID (1 << 16)
-#define DXEPCTL_EOFRNUM (1 << 16)
-#define DXEPCTL_USBACTEP (1 << 15)
-#define DXEPCTL_NEXTEP_MASK (0xf << 11)
-#define DXEPCTL_NEXTEP_SHIFT 11
-#define DXEPCTL_NEXTEP_LIMIT 0xf
-#define DXEPCTL_NEXTEP(_x) ((_x) << 11)
-#define DXEPCTL_MPS_MASK (0x7ff << 0)
-#define DXEPCTL_MPS_SHIFT 0
-#define DXEPCTL_MPS_LIMIT 0x7ff
-#define DXEPCTL_MPS(_x) ((_x) << 0)
-
-#define DIEPINT(_a) HSOTG_REG(0x908 + ((_a) * 0x20))
-#define DOEPINT(_a) HSOTG_REG(0xB08 + ((_a) * 0x20))
-#define DXEPINT_INEPNAKEFF (1 << 6)
-#define DXEPINT_BACK2BACKSETUP (1 << 6)
-#define DXEPINT_INTKNEPMIS (1 << 5)
-#define DXEPINT_INTKNTXFEMP (1 << 4)
-#define DXEPINT_OUTTKNEPDIS (1 << 4)
-#define DXEPINT_TIMEOUT (1 << 3)
-#define DXEPINT_SETUP (1 << 3)
-#define DXEPINT_AHBERR (1 << 2)
-#define DXEPINT_EPDISBLD (1 << 1)
-#define DXEPINT_XFERCOMPL (1 << 0)
-
-#define DIEPTSIZ0 HSOTG_REG(0x910)
-#define DIEPTSIZ0_PKTCNT_MASK (0x3 << 19)
-#define DIEPTSIZ0_PKTCNT_SHIFT 19
-#define DIEPTSIZ0_PKTCNT_LIMIT 0x3
-#define DIEPTSIZ0_PKTCNT(_x) ((_x) << 19)
-#define DIEPTSIZ0_XFERSIZE_MASK (0x7f << 0)
-#define DIEPTSIZ0_XFERSIZE_SHIFT 0
-#define DIEPTSIZ0_XFERSIZE_LIMIT 0x7f
-#define DIEPTSIZ0_XFERSIZE(_x) ((_x) << 0)
-
-#define DOEPTSIZ0 HSOTG_REG(0xB10)
-#define DOEPTSIZ0_SUPCNT_MASK (0x3 << 29)
-#define DOEPTSIZ0_SUPCNT_SHIFT 29
-#define DOEPTSIZ0_SUPCNT_LIMIT 0x3
-#define DOEPTSIZ0_SUPCNT(_x) ((_x) << 29)
-#define DOEPTSIZ0_PKTCNT (1 << 19)
-#define DOEPTSIZ0_XFERSIZE_MASK (0x7f << 0)
-#define DOEPTSIZ0_XFERSIZE_SHIFT 0
-
-#define DIEPTSIZ(_a) HSOTG_REG(0x910 + ((_a) * 0x20))
-#define DOEPTSIZ(_a) HSOTG_REG(0xB10 + ((_a) * 0x20))
-#define DXEPTSIZ_MC_MASK (0x3 << 29)
-#define DXEPTSIZ_MC_SHIFT 29
-#define DXEPTSIZ_MC_LIMIT 0x3
-#define DXEPTSIZ_MC(_x) ((_x) << 29)
-#define DXEPTSIZ_PKTCNT_MASK (0x3ff << 19)
-#define DXEPTSIZ_PKTCNT_SHIFT 19
-#define DXEPTSIZ_PKTCNT_LIMIT 0x3ff
-#define DXEPTSIZ_PKTCNT_GET(_v) (((_v) >> 19) & 0x3ff)
-#define DXEPTSIZ_PKTCNT(_x) ((_x) << 19)
-#define DXEPTSIZ_XFERSIZE_MASK (0x7ffff << 0)
-#define DXEPTSIZ_XFERSIZE_SHIFT 0
-#define DXEPTSIZ_XFERSIZE_LIMIT 0x7ffff
-#define DXEPTSIZ_XFERSIZE_GET(_v) (((_v) >> 0) & 0x7ffff)
-#define DXEPTSIZ_XFERSIZE(_x) ((_x) << 0)
-
-#define DIEPDMA(_a) HSOTG_REG(0x914 + ((_a) * 0x20))
-#define DOEPDMA(_a) HSOTG_REG(0xB14 + ((_a) * 0x20))
-
-#define DTXFSTS(_a) HSOTG_REG(0x918 + ((_a) * 0x20))
-
-#define PCGCTL HSOTG_REG(0x0e00)
-#define PCGCTL_IF_DEV_MODE (1 << 31)
-#define PCGCTL_P2HD_PRT_SPD_MASK (0x3 << 29)
-#define PCGCTL_P2HD_PRT_SPD_SHIFT 29
-#define PCGCTL_P2HD_DEV_ENUM_SPD_MASK (0x3 << 27)
-#define PCGCTL_P2HD_DEV_ENUM_SPD_SHIFT 27
-#define PCGCTL_MAC_DEV_ADDR_MASK (0x7f << 20)
-#define PCGCTL_MAC_DEV_ADDR_SHIFT 20
-#define PCGCTL_MAX_TERMSEL (1 << 19)
-#define PCGCTL_MAX_XCVRSELECT_MASK (0x3 << 17)
-#define PCGCTL_MAX_XCVRSELECT_SHIFT 17
-#define PCGCTL_PORT_POWER (1 << 16)
-#define PCGCTL_PRT_CLK_SEL_MASK (0x3 << 14)
-#define PCGCTL_PRT_CLK_SEL_SHIFT 14
-#define PCGCTL_ESS_REG_RESTORED (1 << 13)
-#define PCGCTL_EXTND_HIBER_SWITCH (1 << 12)
-#define PCGCTL_EXTND_HIBER_PWRCLMP (1 << 11)
-#define PCGCTL_ENBL_EXTND_HIBER (1 << 10)
-#define PCGCTL_RESTOREMODE (1 << 9)
-#define PCGCTL_RESETAFTSUSP (1 << 8)
-#define PCGCTL_DEEP_SLEEP (1 << 7)
-#define PCGCTL_PHY_IN_SLEEP (1 << 6)
-#define PCGCTL_ENBL_SLEEP_GATING (1 << 5)
-#define PCGCTL_RSTPDWNMODULE (1 << 3)
-#define PCGCTL_PWRCLMP (1 << 2)
-#define PCGCTL_GATEHCLK (1 << 1)
-#define PCGCTL_STOPPCLK (1 << 0)
-
-#define EPFIFO(_a) HSOTG_REG(0x1000 + ((_a) * 0x1000))
-
-/* Host Mode Registers */
-
-#define HCFG HSOTG_REG(0x0400)
-#define HCFG_MODECHTIMEN (1 << 31)
-#define HCFG_PERSCHEDENA (1 << 26)
-#define HCFG_FRLISTEN_MASK (0x3 << 24)
-#define HCFG_FRLISTEN_SHIFT 24
-#define HCFG_FRLISTEN_8 (0 << 24)
-#define FRLISTEN_8_SIZE 8
-#define HCFG_FRLISTEN_16 (1 << 24)
-#define FRLISTEN_16_SIZE 16
-#define HCFG_FRLISTEN_32 (2 << 24)
-#define FRLISTEN_32_SIZE 32
-#define HCFG_FRLISTEN_64 (3 << 24)
-#define FRLISTEN_64_SIZE 64
-#define HCFG_DESCDMA (1 << 23)
-#define HCFG_RESVALID_MASK (0xff << 8)
-#define HCFG_RESVALID_SHIFT 8
-#define HCFG_ENA32KHZ (1 << 7)
-#define HCFG_FSLSSUPP (1 << 2)
-#define HCFG_FSLSPCLKSEL_MASK (0x3 << 0)
-#define HCFG_FSLSPCLKSEL_SHIFT 0
-#define HCFG_FSLSPCLKSEL_30_60_MHZ 0
-#define HCFG_FSLSPCLKSEL_48_MHZ 1
-#define HCFG_FSLSPCLKSEL_6_MHZ 2
-
-#define HFIR HSOTG_REG(0x0404)
-#define HFIR_FRINT_MASK (0xffff << 0)
-#define HFIR_FRINT_SHIFT 0
-#define HFIR_RLDCTRL (1 << 16)
-
-#define HFNUM HSOTG_REG(0x0408)
-#define HFNUM_FRREM_MASK (0xffff << 16)
-#define HFNUM_FRREM_SHIFT 16
-#define HFNUM_FRNUM_MASK (0xffff << 0)
-#define HFNUM_FRNUM_SHIFT 0
-#define HFNUM_MAX_FRNUM 0x3fff
-
-#define HPTXSTS HSOTG_REG(0x0410)
-#define TXSTS_QTOP_ODD (1 << 31)
-#define TXSTS_QTOP_CHNEP_MASK (0xf << 27)
-#define TXSTS_QTOP_CHNEP_SHIFT 27
-#define TXSTS_QTOP_TOKEN_MASK (0x3 << 25)
-#define TXSTS_QTOP_TOKEN_SHIFT 25
-#define TXSTS_QTOP_TERMINATE (1 << 24)
-#define TXSTS_QSPCAVAIL_MASK (0xff << 16)
-#define TXSTS_QSPCAVAIL_SHIFT 16
-#define TXSTS_FSPCAVAIL_MASK (0xffff << 0)
-#define TXSTS_FSPCAVAIL_SHIFT 0
-
-#define HAINT HSOTG_REG(0x0414)
-#define HAINTMSK HSOTG_REG(0x0418)
-#define HFLBADDR HSOTG_REG(0x041c)
-
-#define HPRT0 HSOTG_REG(0x0440)
-#define HPRT0_SPD_MASK (0x3 << 17)
-#define HPRT0_SPD_SHIFT 17
-#define HPRT0_SPD_HIGH_SPEED 0
-#define HPRT0_SPD_FULL_SPEED 1
-#define HPRT0_SPD_LOW_SPEED 2
-#define HPRT0_TSTCTL_MASK (0xf << 13)
-#define HPRT0_TSTCTL_SHIFT 13
-#define HPRT0_PWR (1 << 12)
-#define HPRT0_LNSTS_MASK (0x3 << 10)
-#define HPRT0_LNSTS_SHIFT 10
-#define HPRT0_RST (1 << 8)
-#define HPRT0_SUSP (1 << 7)
-#define HPRT0_RES (1 << 6)
-#define HPRT0_OVRCURRCHG (1 << 5)
-#define HPRT0_OVRCURRACT (1 << 4)
-#define HPRT0_ENACHG (1 << 3)
-#define HPRT0_ENA (1 << 2)
-#define HPRT0_CONNDET (1 << 1)
-#define HPRT0_CONNSTS (1 << 0)
-
-#define HCCHAR(_ch) HSOTG_REG(0x0500 + 0x20 * (_ch))
-#define HCCHAR_CHENA (1 << 31)
-#define HCCHAR_CHDIS (1 << 30)
-#define HCCHAR_ODDFRM (1 << 29)
-#define HCCHAR_DEVADDR_MASK (0x7f << 22)
-#define HCCHAR_DEVADDR_SHIFT 22
-#define HCCHAR_MULTICNT_MASK (0x3 << 20)
-#define HCCHAR_MULTICNT_SHIFT 20
-#define HCCHAR_EPTYPE_MASK (0x3 << 18)
-#define HCCHAR_EPTYPE_SHIFT 18
-#define HCCHAR_LSPDDEV (1 << 17)
-#define HCCHAR_EPDIR (1 << 15)
-#define HCCHAR_EPNUM_MASK (0xf << 11)
-#define HCCHAR_EPNUM_SHIFT 11
-#define HCCHAR_MPS_MASK (0x7ff << 0)
-#define HCCHAR_MPS_SHIFT 0
-
-#define HCSPLT(_ch) HSOTG_REG(0x0504 + 0x20 * (_ch))
-#define HCSPLT_SPLTENA (1 << 31)
-#define HCSPLT_COMPSPLT (1 << 16)
-#define HCSPLT_XACTPOS_MASK (0x3 << 14)
-#define HCSPLT_XACTPOS_SHIFT 14
-#define HCSPLT_XACTPOS_MID 0
-#define HCSPLT_XACTPOS_END 1
-#define HCSPLT_XACTPOS_BEGIN 2
-#define HCSPLT_XACTPOS_ALL 3
-#define HCSPLT_HUBADDR_MASK (0x7f << 7)
-#define HCSPLT_HUBADDR_SHIFT 7
-#define HCSPLT_PRTADDR_MASK (0x7f << 0)
-#define HCSPLT_PRTADDR_SHIFT 0
-
-#define HCINT(_ch) HSOTG_REG(0x0508 + 0x20 * (_ch))
-#define HCINTMSK(_ch) HSOTG_REG(0x050c + 0x20 * (_ch))
-#define HCINTMSK_RESERVED14_31 (0x3ffff << 14)
-#define HCINTMSK_FRM_LIST_ROLL (1 << 13)
-#define HCINTMSK_XCS_XACT (1 << 12)
-#define HCINTMSK_BNA (1 << 11)
-#define HCINTMSK_DATATGLERR (1 << 10)
-#define HCINTMSK_FRMOVRUN (1 << 9)
-#define HCINTMSK_BBLERR (1 << 8)
-#define HCINTMSK_XACTERR (1 << 7)
-#define HCINTMSK_NYET (1 << 6)
-#define HCINTMSK_ACK (1 << 5)
-#define HCINTMSK_NAK (1 << 4)
-#define HCINTMSK_STALL (1 << 3)
-#define HCINTMSK_AHBERR (1 << 2)
-#define HCINTMSK_CHHLTD (1 << 1)
-#define HCINTMSK_XFERCOMPL (1 << 0)
-
-#define HCTSIZ(_ch) HSOTG_REG(0x0510 + 0x20 * (_ch))
-#define TSIZ_DOPNG (1 << 31)
-#define TSIZ_SC_MC_PID_MASK (0x3 << 29)
-#define TSIZ_SC_MC_PID_SHIFT 29
-#define TSIZ_SC_MC_PID_DATA0 0
-#define TSIZ_SC_MC_PID_DATA2 1
-#define TSIZ_SC_MC_PID_DATA1 2
-#define TSIZ_SC_MC_PID_MDATA 3
-#define TSIZ_SC_MC_PID_SETUP 3
-#define TSIZ_PKTCNT_MASK (0x3ff << 19)
-#define TSIZ_PKTCNT_SHIFT 19
-#define TSIZ_NTD_MASK (0xff << 8)
-#define TSIZ_NTD_SHIFT 8
-#define TSIZ_SCHINFO_MASK (0xff << 0)
-#define TSIZ_SCHINFO_SHIFT 0
-#define TSIZ_XFERSIZE_MASK (0x7ffff << 0)
-#define TSIZ_XFERSIZE_SHIFT 0
-
-#define HCDMA(_ch) HSOTG_REG(0x0514 + 0x20 * (_ch))
-#define HCDMA_DMA_ADDR_MASK (0x1fffff << 11)
-#define HCDMA_DMA_ADDR_SHIFT 11
-#define HCDMA_CTD_MASK (0xff << 3)
-#define HCDMA_CTD_SHIFT 3
-
-#define HCDMAB(_ch) HSOTG_REG(0x051c + 0x20 * (_ch))
-
-#define HCFIFO(_ch) HSOTG_REG(0x1000 + 0x1000 * (_ch))
-
-/**
- * struct dwc2_hcd_dma_desc - Host-mode DMA descriptor structure
- *
- * @status: DMA descriptor status quadlet
- * @buf: DMA descriptor data buffer pointer
- *
- * DMA Descriptor structure contains two quadlets:
- * Status quadlet and Data buffer pointer.
- */
-struct dwc2_hcd_dma_desc {
- u32 status;
- u32 buf;
-};
-
-#define HOST_DMA_A (1 << 31)
-#define HOST_DMA_STS_MASK (0x3 << 28)
-#define HOST_DMA_STS_SHIFT 28
-#define HOST_DMA_STS_PKTERR (1 << 28)
-#define HOST_DMA_EOL (1 << 26)
-#define HOST_DMA_IOC (1 << 25)
-#define HOST_DMA_SUP (1 << 24)
-#define HOST_DMA_ALT_QTD (1 << 23)
-#define HOST_DMA_QTD_OFFSET_MASK (0x3f << 17)
-#define HOST_DMA_QTD_OFFSET_SHIFT 17
-#define HOST_DMA_ISOC_NBYTES_MASK (0xfff << 0)
-#define HOST_DMA_ISOC_NBYTES_SHIFT 0
-#define HOST_DMA_NBYTES_MASK (0x1ffff << 0)
-#define HOST_DMA_NBYTES_SHIFT 0
-
-#define MAX_DMA_DESC_SIZE 131071
-#define MAX_DMA_DESC_NUM_GENERIC 64
-#define MAX_DMA_DESC_NUM_HS_ISOC 256
-
-#endif /* __DWC2_HW_H__ */
+++ /dev/null
-/*
- * pci.c - DesignWare HS OTG Controller PCI driver
- *
- * Copyright (C) 2004-2013 Synopsys, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Provides the initialization and cleanup entry points for the DWC_otg PCI
- * driver
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/pci.h>
-#include <linux/usb.h>
-
-#include <linux/usb/hcd.h>
-#include <linux/usb/ch11.h>
-
-#include "core.h"
-#include "hcd.h"
-
-#define PCI_VENDOR_ID_SYNOPSYS 0x16c3
-#define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0
-
-static const char dwc2_driver_name[] = "dwc2";
-
-static const struct dwc2_core_params dwc2_module_params = {
- .otg_cap = -1,
- .otg_ver = -1,
- .dma_enable = -1,
- .dma_desc_enable = 0,
- .speed = -1,
- .enable_dynamic_fifo = -1,
- .en_multiple_tx_fifo = -1,
- .host_rx_fifo_size = 1024,
- .host_nperio_tx_fifo_size = 256,
- .host_perio_tx_fifo_size = 1024,
- .max_transfer_size = 65535,
- .max_packet_count = 511,
- .host_channels = -1,
- .phy_type = -1,
- .phy_utmi_width = -1,
- .phy_ulpi_ddr = -1,
- .phy_ulpi_ext_vbus = -1,
- .i2c_enable = -1,
- .ulpi_fs_ls = -1,
- .host_support_fs_ls_low_power = -1,
- .host_ls_low_power_phy_clk = -1,
- .ts_dline = -1,
- .reload_ctl = -1,
- .ahbcfg = -1,
- .uframe_sched = -1,
-};
-
-/**
- * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
- * DWC_otg driver
- *
- * @dev: Bus device
- *
- * This routine is called, for example, when the rmmod command is executed. The
- * device may or may not be electrically present. If it is present, the driver
- * stops device processing. Any resources used on behalf of this device are
- * freed.
- */
-static void dwc2_driver_remove(struct pci_dev *dev)
-{
- struct dwc2_hsotg *hsotg = pci_get_drvdata(dev);
-
- dwc2_hcd_remove(hsotg);
- pci_disable_device(dev);
-}
-
-/**
- * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
- * driver
- *
- * @dev: Bus device
- *
- * This routine creates the driver components required to control the device
- * (core, HCD, and PCD) and initializes the device. The driver components are
- * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
- * in the device private data. This allows the driver to access the dwc2_hsotg
- * structure on subsequent calls to driver methods for this device.
- */
-static int dwc2_driver_probe(struct pci_dev *dev,
- const struct pci_device_id *id)
-{
- struct dwc2_hsotg *hsotg;
- int retval;
-
- hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
- if (!hsotg)
- return -ENOMEM;
-
- hsotg->dev = &dev->dev;
- hsotg->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);
- if (IS_ERR(hsotg->regs))
- return PTR_ERR(hsotg->regs);
-
- dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
- (unsigned long)pci_resource_start(dev, 0), hsotg->regs);
-
- if (pci_enable_device(dev) < 0)
- return -ENODEV;
-
- pci_set_master(dev);
-
- retval = dwc2_hcd_init(hsotg, dev->irq, &dwc2_module_params);
- if (retval) {
- pci_disable_device(dev);
- return retval;
- }
-
- pci_set_drvdata(dev, hsotg);
-
- return retval;
-}
-
-static const struct pci_device_id dwc2_pci_ids[] = {
- {
- PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
- },
- {
- PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
- PCI_DEVICE_ID_STMICRO_USB_OTG),
- },
- { /* end: all zeroes */ }
-};
-MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
-
-static struct pci_driver dwc2_pci_driver = {
- .name = dwc2_driver_name,
- .id_table = dwc2_pci_ids,
- .probe = dwc2_driver_probe,
- .remove = dwc2_driver_remove,
-};
-
-module_pci_driver(dwc2_pci_driver);
-
-MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
-MODULE_AUTHOR("Synopsys, Inc.");
-MODULE_LICENSE("Dual BSD/GPL");
+++ /dev/null
-/*
- * platform.c - DesignWare HS OTG Controller platform driver
- *
- * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The names of the above-listed copyright holders may not be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * ALTERNATIVELY, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option) any
- * later version.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-
-#include "core.h"
-#include "hcd.h"
-
-static const char dwc2_driver_name[] = "dwc2";
-
-static const struct dwc2_core_params params_bcm2835 = {
- .otg_cap = 0, /* HNP/SRP capable */
- .otg_ver = 0, /* 1.3 */
- .dma_enable = 1,
- .dma_desc_enable = 0,
- .speed = 0, /* High Speed */
- .enable_dynamic_fifo = 1,
- .en_multiple_tx_fifo = 1,
- .host_rx_fifo_size = 774, /* 774 DWORDs */
- .host_nperio_tx_fifo_size = 256, /* 256 DWORDs */
- .host_perio_tx_fifo_size = 512, /* 512 DWORDs */
- .max_transfer_size = 65535,
- .max_packet_count = 511,
- .host_channels = 8,
- .phy_type = 1, /* UTMI */
- .phy_utmi_width = 8, /* 8 bits */
- .phy_ulpi_ddr = 0, /* Single */
- .phy_ulpi_ext_vbus = 0,
- .i2c_enable = 0,
- .ulpi_fs_ls = 0,
- .host_support_fs_ls_low_power = 0,
- .host_ls_low_power_phy_clk = 0, /* 48 MHz */
- .ts_dline = 0,
- .reload_ctl = 0,
- .ahbcfg = 0x10,
- .uframe_sched = 0,
-};
-
-/**
- * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
- * DWC_otg driver
- *
- * @dev: Platform device
- *
- * This routine is called, for example, when the rmmod command is executed. The
- * device may or may not be electrically present. If it is present, the driver
- * stops device processing. Any resources used on behalf of this device are
- * freed.
- */
-static int dwc2_driver_remove(struct platform_device *dev)
-{
- struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
-
- dwc2_hcd_remove(hsotg);
-
- return 0;
-}
-
-static const struct of_device_id dwc2_of_match_table[] = {
- { .compatible = "brcm,bcm2835-usb", .data = ¶ms_bcm2835 },
- { .compatible = "snps,dwc2", .data = NULL },
- {},
-};
-MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
-
-/**
- * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
- * driver
- *
- * @dev: Platform device
- *
- * This routine creates the driver components required to control the device
- * (core, HCD, and PCD) and initializes the device. The driver components are
- * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
- * in the device private data. This allows the driver to access the dwc2_hsotg
- * structure on subsequent calls to driver methods for this device.
- */
-static int dwc2_driver_probe(struct platform_device *dev)
-{
- const struct of_device_id *match;
- const struct dwc2_core_params *params;
- struct dwc2_core_params defparams;
- struct dwc2_hsotg *hsotg;
- struct resource *res;
- int retval;
- int irq;
-
- match = of_match_device(dwc2_of_match_table, &dev->dev);
- if (match && match->data) {
- params = match->data;
- } else {
- /* Default all params to autodetect */
- dwc2_set_all_params(&defparams, -1);
- params = &defparams;
- }
-
- hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
- if (!hsotg)
- return -ENOMEM;
-
- hsotg->dev = &dev->dev;
-
- /*
- * Use reasonable defaults so platforms don't have to provide these.
- */
- if (!dev->dev.dma_mask)
- dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
- retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
- if (retval)
- return retval;
-
- irq = platform_get_irq(dev, 0);
- if (irq < 0) {
- dev_err(&dev->dev, "missing IRQ resource\n");
- return irq;
- }
-
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- hsotg->regs = devm_ioremap_resource(&dev->dev, res);
- if (IS_ERR(hsotg->regs))
- return PTR_ERR(hsotg->regs);
-
- dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
- (unsigned long)res->start, hsotg->regs);
-
- retval = dwc2_hcd_init(hsotg, irq, params);
- if (retval)
- return retval;
-
- platform_set_drvdata(dev, hsotg);
-
- return retval;
-}
-
-static struct platform_driver dwc2_platform_driver = {
- .driver = {
- .name = dwc2_driver_name,
- .of_match_table = dwc2_of_match_table,
- },
- .probe = dwc2_driver_probe,
- .remove = dwc2_driver_remove,
-};
-
-module_platform_driver(dwc2_platform_driver);
-
-MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
-MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
-MODULE_LICENSE("Dual BSD/GPL");
source "drivers/usb/dwc3/Kconfig"
+source "drivers/usb/dwc2/Kconfig"
+
source "drivers/usb/chipidea/Kconfig"
comment "USB port drivers"
obj-$(CONFIG_USB) += core/
obj-$(CONFIG_USB_DWC3) += dwc3/
+obj-$(CONFIG_USB_DWC2) += dwc2/
obj-$(CONFIG_USB_MON) += mon/
--- /dev/null
+config USB_DWC2
+ tristate "DesignWare USB2 DRD Core Support"
+ depends on USB
+ help
+ Say Y or M here if your system has a Dual Role HighSpeed
+ USB controller based on the DesignWare HSOTG IP Core.
+
+ If you choose to build this driver as dynamically linked
+ modules, the core module will be called dwc2.ko, the
+ PCI bus interface module (if you have a PCI bus system)
+ will be called dwc2_pci.ko and the platform interface module
+ (for controllers directly connected to the CPU) will be called
+ dwc2_platform.ko.
+
+ NOTE: This driver at present only implements the Host mode
+ of the controller. The existing s3c-hsotg driver supports
+ Peripheral mode, but only for the Samsung S3C platforms.
+ There are plans to merge the s3c-hsotg driver with this
+ driver in the near future to create a dual-role driver.
+
+if USB_DWC2
+
+config USB_DWC2_DEBUG
+ bool "Enable Debugging Messages"
+ help
+ Say Y here to enable debugging messages in the DWC2 Driver.
+
+config USB_DWC2_VERBOSE
+ bool "Enable Verbose Debugging Messages"
+ depends on USB_DWC2_DEBUG
+ help
+ Say Y here to enable verbose debugging messages in the DWC2 Driver.
+ WARNING: Enabling this will quickly fill your message log.
+ If in doubt, say N.
+
+config USB_DWC2_TRACK_MISSED_SOFS
+ bool "Enable Missed SOF Tracking"
+ help
+ Say Y here to enable logging of missed SOF events to the dmesg log.
+ WARNING: This feature is still experimental.
+ If in doubt, say N.
+
+config USB_DWC2_DEBUG_PERIODIC
+ bool "Enable Debugging Messages For Periodic Transfers"
+ depends on USB_DWC2_DEBUG || USB_DWC2_VERBOSE
+ default y
+ help
+ Say N here to disable (verbose) debugging messages to be
+ logged for periodic transfers. This allows better debugging of
+ non-periodic transfers, but of course the debug logs will be
+ incomplete. Note that this also disables some debug messages
+ for which the transfer type cannot be deduced.
+endif
--- /dev/null
+ccflags-$(CONFIG_USB_DWC2_DEBUG) += -DDEBUG
+ccflags-$(CONFIG_USB_DWC2_VERBOSE) += -DVERBOSE_DEBUG
+
+obj-$(CONFIG_USB_DWC2) += dwc2.o
+
+dwc2-y += core.o core_intr.o
+
+# NOTE: This driver at present only implements the Host mode
+# of the controller. The existing s3c-hsotg driver supports
+# Peripheral mode, but only for the Samsung S3C platforms.
+# There are plans to merge the s3c-hsotg driver with this
+# driver in the near future to create a dual-role driver. Once
+# that is done, Host mode will become an optional feature that
+# is selected with a config option.
+
+dwc2-y += hcd.o hcd_intr.o
+dwc2-y += hcd_queue.o hcd_ddma.o
+
+ifneq ($(CONFIG_PCI),)
+ obj-$(CONFIG_USB_DWC2) += dwc2_pci.o
+endif
+obj-$(CONFIG_USB_DWC2) += dwc2_platform.o
+
+dwc2_pci-y += pci.o
+dwc2_platform-y += platform.o
--- /dev/null
+/*
+ * core.c - DesignWare HS OTG Controller common routines
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * The Core code provides basic services for accessing and managing the
+ * DWC_otg hardware. These services are used by both the Host Controller
+ * Driver and the Peripheral Controller Driver.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <linux/usb/hcd.h>
+#include <linux/usb/ch11.h>
+
+#include "core.h"
+#include "hcd.h"
+
+/**
+ * dwc2_enable_common_interrupts() - Initializes the commmon interrupts,
+ * used in both device and host modes
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ */
+static void dwc2_enable_common_interrupts(struct dwc2_hsotg *hsotg)
+{
+ u32 intmsk;
+
+ /* Clear any pending OTG Interrupts */
+ writel(0xffffffff, hsotg->regs + GOTGINT);
+
+ /* Clear any pending interrupts */
+ writel(0xffffffff, hsotg->regs + GINTSTS);
+
+ /* Enable the interrupts in the GINTMSK */
+ intmsk = GINTSTS_MODEMIS | GINTSTS_OTGINT;
+
+ if (hsotg->core_params->dma_enable <= 0)
+ intmsk |= GINTSTS_RXFLVL;
+
+ intmsk |= GINTSTS_CONIDSTSCHNG | GINTSTS_WKUPINT | GINTSTS_USBSUSP |
+ GINTSTS_SESSREQINT;
+
+ writel(intmsk, hsotg->regs + GINTMSK);
+}
+
+/*
+ * Initializes the FSLSPClkSel field of the HCFG register depending on the
+ * PHY type
+ */
+static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
+{
+ u32 hcfg, val;
+
+ if ((hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
+ hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
+ hsotg->core_params->ulpi_fs_ls > 0) ||
+ hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
+ /* Full speed PHY */
+ val = HCFG_FSLSPCLKSEL_48_MHZ;
+ } else {
+ /* High speed PHY running at full speed or high speed */
+ val = HCFG_FSLSPCLKSEL_30_60_MHZ;
+ }
+
+ dev_dbg(hsotg->dev, "Initializing HCFG.FSLSPClkSel to %08x\n", val);
+ hcfg = readl(hsotg->regs + HCFG);
+ hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
+ hcfg |= val << HCFG_FSLSPCLKSEL_SHIFT;
+ writel(hcfg, hsotg->regs + HCFG);
+}
+
+/*
+ * Do core a soft reset of the core. Be careful with this because it
+ * resets all the internal state machines of the core.
+ */
+static int dwc2_core_reset(struct dwc2_hsotg *hsotg)
+{
+ u32 greset;
+ int count = 0;
+
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ /* Wait for AHB master IDLE state */
+ do {
+ usleep_range(20000, 40000);
+ greset = readl(hsotg->regs + GRSTCTL);
+ if (++count > 50) {
+ dev_warn(hsotg->dev,
+ "%s() HANG! AHB Idle GRSTCTL=%0x\n",
+ __func__, greset);
+ return -EBUSY;
+ }
+ } while (!(greset & GRSTCTL_AHBIDLE));
+
+ /* Core Soft Reset */
+ count = 0;
+ greset |= GRSTCTL_CSFTRST;
+ writel(greset, hsotg->regs + GRSTCTL);
+ do {
+ usleep_range(20000, 40000);
+ greset = readl(hsotg->regs + GRSTCTL);
+ if (++count > 50) {
+ dev_warn(hsotg->dev,
+ "%s() HANG! Soft Reset GRSTCTL=%0x\n",
+ __func__, greset);
+ return -EBUSY;
+ }
+ } while (greset & GRSTCTL_CSFTRST);
+
+ /*
+ * NOTE: This long sleep is _very_ important, otherwise the core will
+ * not stay in host mode after a connector ID change!
+ */
+ usleep_range(150000, 200000);
+
+ return 0;
+}
+
+static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
+{
+ u32 usbcfg, i2cctl;
+ int retval = 0;
+
+ /*
+ * core_init() is now called on every switch so only call the
+ * following for the first time through
+ */
+ if (select_phy) {
+ dev_dbg(hsotg->dev, "FS PHY selected\n");
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+ usbcfg |= GUSBCFG_PHYSEL;
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+
+ /* Reset after a PHY select */
+ retval = dwc2_core_reset(hsotg);
+ if (retval) {
+ dev_err(hsotg->dev, "%s() Reset failed, aborting",
+ __func__);
+ return retval;
+ }
+ }
+
+ /*
+ * Program DCFG.DevSpd or HCFG.FSLSPclkSel to 48Mhz in FS. Also
+ * do this on HNP Dev/Host mode switches (done in dev_init and
+ * host_init).
+ */
+ if (dwc2_is_host_mode(hsotg))
+ dwc2_init_fs_ls_pclk_sel(hsotg);
+
+ if (hsotg->core_params->i2c_enable > 0) {
+ dev_dbg(hsotg->dev, "FS PHY enabling I2C\n");
+
+ /* Program GUSBCFG.OtgUtmiFsSel to I2C */
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+ usbcfg |= GUSBCFG_OTG_UTMI_FS_SEL;
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+
+ /* Program GI2CCTL.I2CEn */
+ i2cctl = readl(hsotg->regs + GI2CCTL);
+ i2cctl &= ~GI2CCTL_I2CDEVADDR_MASK;
+ i2cctl |= 1 << GI2CCTL_I2CDEVADDR_SHIFT;
+ i2cctl &= ~GI2CCTL_I2CEN;
+ writel(i2cctl, hsotg->regs + GI2CCTL);
+ i2cctl |= GI2CCTL_I2CEN;
+ writel(i2cctl, hsotg->regs + GI2CCTL);
+ }
+
+ return retval;
+}
+
+static int dwc2_hs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
+{
+ u32 usbcfg;
+ int retval = 0;
+
+ if (!select_phy)
+ return -ENODEV;
+
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+
+ /*
+ * HS PHY parameters. These parameters are preserved during soft reset
+ * so only program the first time. Do a soft reset immediately after
+ * setting phyif.
+ */
+ switch (hsotg->core_params->phy_type) {
+ case DWC2_PHY_TYPE_PARAM_ULPI:
+ /* ULPI interface */
+ dev_dbg(hsotg->dev, "HS ULPI PHY selected\n");
+ usbcfg |= GUSBCFG_ULPI_UTMI_SEL;
+ usbcfg &= ~(GUSBCFG_PHYIF16 | GUSBCFG_DDRSEL);
+ if (hsotg->core_params->phy_ulpi_ddr > 0)
+ usbcfg |= GUSBCFG_DDRSEL;
+ break;
+ case DWC2_PHY_TYPE_PARAM_UTMI:
+ /* UTMI+ interface */
+ dev_dbg(hsotg->dev, "HS UTMI+ PHY selected\n");
+ usbcfg &= ~(GUSBCFG_ULPI_UTMI_SEL | GUSBCFG_PHYIF16);
+ if (hsotg->core_params->phy_utmi_width == 16)
+ usbcfg |= GUSBCFG_PHYIF16;
+ break;
+ default:
+ dev_err(hsotg->dev, "FS PHY selected at HS!\n");
+ break;
+ }
+
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+
+ /* Reset after setting the PHY parameters */
+ retval = dwc2_core_reset(hsotg);
+ if (retval) {
+ dev_err(hsotg->dev, "%s() Reset failed, aborting",
+ __func__);
+ return retval;
+ }
+
+ return retval;
+}
+
+static int dwc2_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
+{
+ u32 usbcfg;
+ int retval = 0;
+
+ if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL &&
+ hsotg->core_params->phy_type == DWC2_PHY_TYPE_PARAM_FS) {
+ /* If FS mode with FS PHY */
+ retval = dwc2_fs_phy_init(hsotg, select_phy);
+ if (retval)
+ return retval;
+ } else {
+ /* High speed PHY */
+ retval = dwc2_hs_phy_init(hsotg, select_phy);
+ if (retval)
+ return retval;
+ }
+
+ if (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI &&
+ hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED &&
+ hsotg->core_params->ulpi_fs_ls > 0) {
+ dev_dbg(hsotg->dev, "Setting ULPI FSLS\n");
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+ usbcfg |= GUSBCFG_ULPI_FS_LS;
+ usbcfg |= GUSBCFG_ULPI_CLK_SUSP_M;
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+ } else {
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+ usbcfg &= ~GUSBCFG_ULPI_FS_LS;
+ usbcfg &= ~GUSBCFG_ULPI_CLK_SUSP_M;
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+ }
+
+ return retval;
+}
+
+static int dwc2_gahbcfg_init(struct dwc2_hsotg *hsotg)
+{
+ u32 ahbcfg = readl(hsotg->regs + GAHBCFG);
+
+ switch (hsotg->hw_params.arch) {
+ case GHWCFG2_EXT_DMA_ARCH:
+ dev_err(hsotg->dev, "External DMA Mode not supported\n");
+ return -EINVAL;
+
+ case GHWCFG2_INT_DMA_ARCH:
+ dev_dbg(hsotg->dev, "Internal DMA Mode\n");
+ if (hsotg->core_params->ahbcfg != -1) {
+ ahbcfg &= GAHBCFG_CTRL_MASK;
+ ahbcfg |= hsotg->core_params->ahbcfg &
+ ~GAHBCFG_CTRL_MASK;
+ }
+ break;
+
+ case GHWCFG2_SLAVE_ONLY_ARCH:
+ default:
+ dev_dbg(hsotg->dev, "Slave Only Mode\n");
+ break;
+ }
+
+ dev_dbg(hsotg->dev, "dma_enable:%d dma_desc_enable:%d\n",
+ hsotg->core_params->dma_enable,
+ hsotg->core_params->dma_desc_enable);
+
+ if (hsotg->core_params->dma_enable > 0) {
+ if (hsotg->core_params->dma_desc_enable > 0)
+ dev_dbg(hsotg->dev, "Using Descriptor DMA mode\n");
+ else
+ dev_dbg(hsotg->dev, "Using Buffer DMA mode\n");
+ } else {
+ dev_dbg(hsotg->dev, "Using Slave mode\n");
+ hsotg->core_params->dma_desc_enable = 0;
+ }
+
+ if (hsotg->core_params->dma_enable > 0)
+ ahbcfg |= GAHBCFG_DMA_EN;
+
+ writel(ahbcfg, hsotg->regs + GAHBCFG);
+
+ return 0;
+}
+
+static void dwc2_gusbcfg_init(struct dwc2_hsotg *hsotg)
+{
+ u32 usbcfg;
+
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+ usbcfg &= ~(GUSBCFG_HNPCAP | GUSBCFG_SRPCAP);
+
+ switch (hsotg->hw_params.op_mode) {
+ case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
+ if (hsotg->core_params->otg_cap ==
+ DWC2_CAP_PARAM_HNP_SRP_CAPABLE)
+ usbcfg |= GUSBCFG_HNPCAP;
+ if (hsotg->core_params->otg_cap !=
+ DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
+ usbcfg |= GUSBCFG_SRPCAP;
+ break;
+
+ case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
+ case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
+ case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
+ if (hsotg->core_params->otg_cap !=
+ DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE)
+ usbcfg |= GUSBCFG_SRPCAP;
+ break;
+
+ case GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE:
+ case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE:
+ case GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST:
+ default:
+ break;
+ }
+
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+}
+
+/**
+ * dwc2_core_init() - Initializes the DWC_otg controller registers and
+ * prepares the core for device mode or host mode operation
+ *
+ * @hsotg: Programming view of the DWC_otg controller
+ * @select_phy: If true then also set the Phy type
+ * @irq: If >= 0, the irq to register
+ */
+int dwc2_core_init(struct dwc2_hsotg *hsotg, bool select_phy, int irq)
+{
+ u32 usbcfg, otgctl;
+ int retval;
+
+ dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
+
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+
+ /* Set ULPI External VBUS bit if needed */
+ usbcfg &= ~GUSBCFG_ULPI_EXT_VBUS_DRV;
+ if (hsotg->core_params->phy_ulpi_ext_vbus ==
+ DWC2_PHY_ULPI_EXTERNAL_VBUS)
+ usbcfg |= GUSBCFG_ULPI_EXT_VBUS_DRV;
+
+ /* Set external TS Dline pulsing bit if needed */
+ usbcfg &= ~GUSBCFG_TERMSELDLPULSE;
+ if (hsotg->core_params->ts_dline > 0)
+ usbcfg |= GUSBCFG_TERMSELDLPULSE;
+
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+
+ /* Reset the Controller */
+ retval = dwc2_core_reset(hsotg);
+ if (retval) {
+ dev_err(hsotg->dev, "%s(): Reset failed, aborting\n",
+ __func__);
+ return retval;
+ }
+
+ /*
+ * This needs to happen in FS mode before any other programming occurs
+ */
+ retval = dwc2_phy_init(hsotg, select_phy);
+ if (retval)
+ return retval;
+
+ /* Program the GAHBCFG Register */
+ retval = dwc2_gahbcfg_init(hsotg);
+ if (retval)
+ return retval;
+
+ /* Program the GUSBCFG register */
+ dwc2_gusbcfg_init(hsotg);
+
+ /* Program the GOTGCTL register */
+ otgctl = readl(hsotg->regs + GOTGCTL);
+ otgctl &= ~GOTGCTL_OTGVER;
+ if (hsotg->core_params->otg_ver > 0)
+ otgctl |= GOTGCTL_OTGVER;
+ writel(otgctl, hsotg->regs + GOTGCTL);
+ dev_dbg(hsotg->dev, "OTG VER PARAM: %d\n", hsotg->core_params->otg_ver);
+
+ /* Clear the SRP success bit for FS-I2c */
+ hsotg->srp_success = 0;
+
+ if (irq >= 0) {
+ dev_dbg(hsotg->dev, "registering common handler for irq%d\n",
+ irq);
+ retval = devm_request_irq(hsotg->dev, irq,
+ dwc2_handle_common_intr, IRQF_SHARED,
+ dev_name(hsotg->dev), hsotg);
+ if (retval)
+ return retval;
+ }
+
+ /* Enable common interrupts */
+ dwc2_enable_common_interrupts(hsotg);
+
+ /*
+ * Do device or host intialization based on mode during PCD and
+ * HCD initialization
+ */
+ if (dwc2_is_host_mode(hsotg)) {
+ dev_dbg(hsotg->dev, "Host Mode\n");
+ hsotg->op_state = OTG_STATE_A_HOST;
+ } else {
+ dev_dbg(hsotg->dev, "Device Mode\n");
+ hsotg->op_state = OTG_STATE_B_PERIPHERAL;
+ }
+
+ return 0;
+}
+
+/**
+ * dwc2_enable_host_interrupts() - Enables the Host mode interrupts
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg)
+{
+ u32 intmsk;
+
+ dev_dbg(hsotg->dev, "%s()\n", __func__);
+
+ /* Disable all interrupts */
+ writel(0, hsotg->regs + GINTMSK);
+ writel(0, hsotg->regs + HAINTMSK);
+
+ /* Enable the common interrupts */
+ dwc2_enable_common_interrupts(hsotg);
+
+ /* Enable host mode interrupts without disturbing common interrupts */
+ intmsk = readl(hsotg->regs + GINTMSK);
+ intmsk |= GINTSTS_DISCONNINT | GINTSTS_PRTINT | GINTSTS_HCHINT;
+ writel(intmsk, hsotg->regs + GINTMSK);
+}
+
+/**
+ * dwc2_disable_host_interrupts() - Disables the Host Mode interrupts
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg)
+{
+ u32 intmsk = readl(hsotg->regs + GINTMSK);
+
+ /* Disable host mode interrupts without disturbing common interrupts */
+ intmsk &= ~(GINTSTS_SOF | GINTSTS_PRTINT | GINTSTS_HCHINT |
+ GINTSTS_PTXFEMP | GINTSTS_NPTXFEMP);
+ writel(intmsk, hsotg->regs + GINTMSK);
+}
+
+static void dwc2_config_fifos(struct dwc2_hsotg *hsotg)
+{
+ struct dwc2_core_params *params = hsotg->core_params;
+ u32 nptxfsiz, hptxfsiz, dfifocfg, grxfsiz;
+
+ if (!params->enable_dynamic_fifo)
+ return;
+
+ /* Rx FIFO */
+ grxfsiz = readl(hsotg->regs + GRXFSIZ);
+ dev_dbg(hsotg->dev, "initial grxfsiz=%08x\n", grxfsiz);
+ grxfsiz &= ~GRXFSIZ_DEPTH_MASK;
+ grxfsiz |= params->host_rx_fifo_size <<
+ GRXFSIZ_DEPTH_SHIFT & GRXFSIZ_DEPTH_MASK;
+ writel(grxfsiz, hsotg->regs + GRXFSIZ);
+ dev_dbg(hsotg->dev, "new grxfsiz=%08x\n", readl(hsotg->regs + GRXFSIZ));
+
+ /* Non-periodic Tx FIFO */
+ dev_dbg(hsotg->dev, "initial gnptxfsiz=%08x\n",
+ readl(hsotg->regs + GNPTXFSIZ));
+ nptxfsiz = params->host_nperio_tx_fifo_size <<
+ FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
+ nptxfsiz |= params->host_rx_fifo_size <<
+ FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
+ writel(nptxfsiz, hsotg->regs + GNPTXFSIZ);
+ dev_dbg(hsotg->dev, "new gnptxfsiz=%08x\n",
+ readl(hsotg->regs + GNPTXFSIZ));
+
+ /* Periodic Tx FIFO */
+ dev_dbg(hsotg->dev, "initial hptxfsiz=%08x\n",
+ readl(hsotg->regs + HPTXFSIZ));
+ hptxfsiz = params->host_perio_tx_fifo_size <<
+ FIFOSIZE_DEPTH_SHIFT & FIFOSIZE_DEPTH_MASK;
+ hptxfsiz |= (params->host_rx_fifo_size +
+ params->host_nperio_tx_fifo_size) <<
+ FIFOSIZE_STARTADDR_SHIFT & FIFOSIZE_STARTADDR_MASK;
+ writel(hptxfsiz, hsotg->regs + HPTXFSIZ);
+ dev_dbg(hsotg->dev, "new hptxfsiz=%08x\n",
+ readl(hsotg->regs + HPTXFSIZ));
+
+ if (hsotg->core_params->en_multiple_tx_fifo > 0 &&
+ hsotg->hw_params.snpsid <= DWC2_CORE_REV_2_94a) {
+ /*
+ * Global DFIFOCFG calculation for Host mode -
+ * include RxFIFO, NPTXFIFO and HPTXFIFO
+ */
+ dfifocfg = readl(hsotg->regs + GDFIFOCFG);
+ dfifocfg &= ~GDFIFOCFG_EPINFOBASE_MASK;
+ dfifocfg |= (params->host_rx_fifo_size +
+ params->host_nperio_tx_fifo_size +
+ params->host_perio_tx_fifo_size) <<
+ GDFIFOCFG_EPINFOBASE_SHIFT &
+ GDFIFOCFG_EPINFOBASE_MASK;
+ writel(dfifocfg, hsotg->regs + GDFIFOCFG);
+ }
+}
+
+/**
+ * dwc2_core_host_init() - Initializes the DWC_otg controller registers for
+ * Host mode
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ *
+ * This function flushes the Tx and Rx FIFOs and flushes any entries in the
+ * request queues. Host channels are reset to ensure that they are ready for
+ * performing transfers.
+ */
+void dwc2_core_host_init(struct dwc2_hsotg *hsotg)
+{
+ u32 hcfg, hfir, otgctl;
+
+ dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
+
+ /* Restart the Phy Clock */
+ writel(0, hsotg->regs + PCGCTL);
+
+ /* Initialize Host Configuration Register */
+ dwc2_init_fs_ls_pclk_sel(hsotg);
+ if (hsotg->core_params->speed == DWC2_SPEED_PARAM_FULL) {
+ hcfg = readl(hsotg->regs + HCFG);
+ hcfg |= HCFG_FSLSSUPP;
+ writel(hcfg, hsotg->regs + HCFG);
+ }
+
+ /*
+ * This bit allows dynamic reloading of the HFIR register during
+ * runtime. This bit needs to be programmed during initial configuration
+ * and its value must not be changed during runtime.
+ */
+ if (hsotg->core_params->reload_ctl > 0) {
+ hfir = readl(hsotg->regs + HFIR);
+ hfir |= HFIR_RLDCTRL;
+ writel(hfir, hsotg->regs + HFIR);
+ }
+
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ u32 op_mode = hsotg->hw_params.op_mode;
+ if (hsotg->hw_params.snpsid < DWC2_CORE_REV_2_90a ||
+ !hsotg->hw_params.dma_desc_enable ||
+ op_mode == GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE ||
+ op_mode == GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE ||
+ op_mode == GHWCFG2_OP_MODE_UNDEFINED) {
+ dev_err(hsotg->dev,
+ "Hardware does not support descriptor DMA mode -\n");
+ dev_err(hsotg->dev,
+ "falling back to buffer DMA mode.\n");
+ hsotg->core_params->dma_desc_enable = 0;
+ } else {
+ hcfg = readl(hsotg->regs + HCFG);
+ hcfg |= HCFG_DESCDMA;
+ writel(hcfg, hsotg->regs + HCFG);
+ }
+ }
+
+ /* Configure data FIFO sizes */
+ dwc2_config_fifos(hsotg);
+
+ /* TODO - check this */
+ /* Clear Host Set HNP Enable in the OTG Control Register */
+ otgctl = readl(hsotg->regs + GOTGCTL);
+ otgctl &= ~GOTGCTL_HSTSETHNPEN;
+ writel(otgctl, hsotg->regs + GOTGCTL);
+
+ /* Make sure the FIFOs are flushed */
+ dwc2_flush_tx_fifo(hsotg, 0x10 /* all TX FIFOs */);
+ dwc2_flush_rx_fifo(hsotg);
+
+ /* Clear Host Set HNP Enable in the OTG Control Register */
+ otgctl = readl(hsotg->regs + GOTGCTL);
+ otgctl &= ~GOTGCTL_HSTSETHNPEN;
+ writel(otgctl, hsotg->regs + GOTGCTL);
+
+ if (hsotg->core_params->dma_desc_enable <= 0) {
+ int num_channels, i;
+ u32 hcchar;
+
+ /* Flush out any leftover queued requests */
+ num_channels = hsotg->core_params->host_channels;
+ for (i = 0; i < num_channels; i++) {
+ hcchar = readl(hsotg->regs + HCCHAR(i));
+ hcchar &= ~HCCHAR_CHENA;
+ hcchar |= HCCHAR_CHDIS;
+ hcchar &= ~HCCHAR_EPDIR;
+ writel(hcchar, hsotg->regs + HCCHAR(i));
+ }
+
+ /* Halt all channels to put them into a known state */
+ for (i = 0; i < num_channels; i++) {
+ int count = 0;
+
+ hcchar = readl(hsotg->regs + HCCHAR(i));
+ hcchar |= HCCHAR_CHENA | HCCHAR_CHDIS;
+ hcchar &= ~HCCHAR_EPDIR;
+ writel(hcchar, hsotg->regs + HCCHAR(i));
+ dev_dbg(hsotg->dev, "%s: Halt channel %d\n",
+ __func__, i);
+ do {
+ hcchar = readl(hsotg->regs + HCCHAR(i));
+ if (++count > 1000) {
+ dev_err(hsotg->dev,
+ "Unable to clear enable on channel %d\n",
+ i);
+ break;
+ }
+ udelay(1);
+ } while (hcchar & HCCHAR_CHENA);
+ }
+ }
+
+ /* Turn on the vbus power */
+ dev_dbg(hsotg->dev, "Init: Port Power? op_state=%d\n", hsotg->op_state);
+ if (hsotg->op_state == OTG_STATE_A_HOST) {
+ u32 hprt0 = dwc2_read_hprt0(hsotg);
+
+ dev_dbg(hsotg->dev, "Init: Power Port (%d)\n",
+ !!(hprt0 & HPRT0_PWR));
+ if (!(hprt0 & HPRT0_PWR)) {
+ hprt0 |= HPRT0_PWR;
+ writel(hprt0, hsotg->regs + HPRT0);
+ }
+ }
+
+ dwc2_enable_host_interrupts(hsotg);
+}
+
+static void dwc2_hc_enable_slave_ints(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+ u32 hcintmsk = HCINTMSK_CHHLTD;
+
+ switch (chan->ep_type) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ case USB_ENDPOINT_XFER_BULK:
+ dev_vdbg(hsotg->dev, "control/bulk\n");
+ hcintmsk |= HCINTMSK_XFERCOMPL;
+ hcintmsk |= HCINTMSK_STALL;
+ hcintmsk |= HCINTMSK_XACTERR;
+ hcintmsk |= HCINTMSK_DATATGLERR;
+ if (chan->ep_is_in) {
+ hcintmsk |= HCINTMSK_BBLERR;
+ } else {
+ hcintmsk |= HCINTMSK_NAK;
+ hcintmsk |= HCINTMSK_NYET;
+ if (chan->do_ping)
+ hcintmsk |= HCINTMSK_ACK;
+ }
+
+ if (chan->do_split) {
+ hcintmsk |= HCINTMSK_NAK;
+ if (chan->complete_split)
+ hcintmsk |= HCINTMSK_NYET;
+ else
+ hcintmsk |= HCINTMSK_ACK;
+ }
+
+ if (chan->error_state)
+ hcintmsk |= HCINTMSK_ACK;
+ break;
+
+ case USB_ENDPOINT_XFER_INT:
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, "intr\n");
+ hcintmsk |= HCINTMSK_XFERCOMPL;
+ hcintmsk |= HCINTMSK_NAK;
+ hcintmsk |= HCINTMSK_STALL;
+ hcintmsk |= HCINTMSK_XACTERR;
+ hcintmsk |= HCINTMSK_DATATGLERR;
+ hcintmsk |= HCINTMSK_FRMOVRUN;
+
+ if (chan->ep_is_in)
+ hcintmsk |= HCINTMSK_BBLERR;
+ if (chan->error_state)
+ hcintmsk |= HCINTMSK_ACK;
+ if (chan->do_split) {
+ if (chan->complete_split)
+ hcintmsk |= HCINTMSK_NYET;
+ else
+ hcintmsk |= HCINTMSK_ACK;
+ }
+ break;
+
+ case USB_ENDPOINT_XFER_ISOC:
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, "isoc\n");
+ hcintmsk |= HCINTMSK_XFERCOMPL;
+ hcintmsk |= HCINTMSK_FRMOVRUN;
+ hcintmsk |= HCINTMSK_ACK;
+
+ if (chan->ep_is_in) {
+ hcintmsk |= HCINTMSK_XACTERR;
+ hcintmsk |= HCINTMSK_BBLERR;
+ }
+ break;
+ default:
+ dev_err(hsotg->dev, "## Unknown EP type ##\n");
+ break;
+ }
+
+ writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
+}
+
+static void dwc2_hc_enable_dma_ints(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+ u32 hcintmsk = HCINTMSK_CHHLTD;
+
+ /*
+ * For Descriptor DMA mode core halts the channel on AHB error.
+ * Interrupt is not required.
+ */
+ if (hsotg->core_params->dma_desc_enable <= 0) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "desc DMA disabled\n");
+ hcintmsk |= HCINTMSK_AHBERR;
+ } else {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "desc DMA enabled\n");
+ if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
+ hcintmsk |= HCINTMSK_XFERCOMPL;
+ }
+
+ if (chan->error_state && !chan->do_split &&
+ chan->ep_type != USB_ENDPOINT_XFER_ISOC) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "setting ACK\n");
+ hcintmsk |= HCINTMSK_ACK;
+ if (chan->ep_is_in) {
+ hcintmsk |= HCINTMSK_DATATGLERR;
+ if (chan->ep_type != USB_ENDPOINT_XFER_INT)
+ hcintmsk |= HCINTMSK_NAK;
+ }
+ }
+
+ writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "set HCINTMSK to %08x\n", hcintmsk);
+}
+
+static void dwc2_hc_enable_ints(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+ u32 intmsk;
+
+ if (hsotg->core_params->dma_enable > 0) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "DMA enabled\n");
+ dwc2_hc_enable_dma_ints(hsotg, chan);
+ } else {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "DMA disabled\n");
+ dwc2_hc_enable_slave_ints(hsotg, chan);
+ }
+
+ /* Enable the top level host channel interrupt */
+ intmsk = readl(hsotg->regs + HAINTMSK);
+ intmsk |= 1 << chan->hc_num;
+ writel(intmsk, hsotg->regs + HAINTMSK);
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "set HAINTMSK to %08x\n", intmsk);
+
+ /* Make sure host channel interrupts are enabled */
+ intmsk = readl(hsotg->regs + GINTMSK);
+ intmsk |= GINTSTS_HCHINT;
+ writel(intmsk, hsotg->regs + GINTMSK);
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "set GINTMSK to %08x\n", intmsk);
+}
+
+/**
+ * dwc2_hc_init() - Prepares a host channel for transferring packets to/from
+ * a specific endpoint
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Information needed to initialize the host channel
+ *
+ * The HCCHARn register is set up with the characteristics specified in chan.
+ * Host channel interrupts that may need to be serviced while this transfer is
+ * in progress are enabled.
+ */
+void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
+{
+ u8 hc_num = chan->hc_num;
+ u32 hcintmsk;
+ u32 hcchar;
+ u32 hcsplt = 0;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ /* Clear old interrupt conditions for this host channel */
+ hcintmsk = 0xffffffff;
+ hcintmsk &= ~HCINTMSK_RESERVED14_31;
+ writel(hcintmsk, hsotg->regs + HCINT(hc_num));
+
+ /* Enable channel interrupts required for this transfer */
+ dwc2_hc_enable_ints(hsotg, chan);
+
+ /*
+ * Program the HCCHARn register with the endpoint characteristics for
+ * the current transfer
+ */
+ hcchar = chan->dev_addr << HCCHAR_DEVADDR_SHIFT & HCCHAR_DEVADDR_MASK;
+ hcchar |= chan->ep_num << HCCHAR_EPNUM_SHIFT & HCCHAR_EPNUM_MASK;
+ if (chan->ep_is_in)
+ hcchar |= HCCHAR_EPDIR;
+ if (chan->speed == USB_SPEED_LOW)
+ hcchar |= HCCHAR_LSPDDEV;
+ hcchar |= chan->ep_type << HCCHAR_EPTYPE_SHIFT & HCCHAR_EPTYPE_MASK;
+ hcchar |= chan->max_packet << HCCHAR_MPS_SHIFT & HCCHAR_MPS_MASK;
+ writel(hcchar, hsotg->regs + HCCHAR(hc_num));
+ if (dbg_hc(chan)) {
+ dev_vdbg(hsotg->dev, "set HCCHAR(%d) to %08x\n",
+ hc_num, hcchar);
+
+ dev_vdbg(hsotg->dev, "%s: Channel %d\n",
+ __func__, hc_num);
+ dev_vdbg(hsotg->dev, " Dev Addr: %d\n",
+ chan->dev_addr);
+ dev_vdbg(hsotg->dev, " Ep Num: %d\n",
+ chan->ep_num);
+ dev_vdbg(hsotg->dev, " Is In: %d\n",
+ chan->ep_is_in);
+ dev_vdbg(hsotg->dev, " Is Low Speed: %d\n",
+ chan->speed == USB_SPEED_LOW);
+ dev_vdbg(hsotg->dev, " Ep Type: %d\n",
+ chan->ep_type);
+ dev_vdbg(hsotg->dev, " Max Pkt: %d\n",
+ chan->max_packet);
+ }
+
+ /* Program the HCSPLT register for SPLITs */
+ if (chan->do_split) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev,
+ "Programming HC %d with split --> %s\n",
+ hc_num,
+ chan->complete_split ? "CSPLIT" : "SSPLIT");
+ if (chan->complete_split)
+ hcsplt |= HCSPLT_COMPSPLT;
+ hcsplt |= chan->xact_pos << HCSPLT_XACTPOS_SHIFT &
+ HCSPLT_XACTPOS_MASK;
+ hcsplt |= chan->hub_addr << HCSPLT_HUBADDR_SHIFT &
+ HCSPLT_HUBADDR_MASK;
+ hcsplt |= chan->hub_port << HCSPLT_PRTADDR_SHIFT &
+ HCSPLT_PRTADDR_MASK;
+ if (dbg_hc(chan)) {
+ dev_vdbg(hsotg->dev, " comp split %d\n",
+ chan->complete_split);
+ dev_vdbg(hsotg->dev, " xact pos %d\n",
+ chan->xact_pos);
+ dev_vdbg(hsotg->dev, " hub addr %d\n",
+ chan->hub_addr);
+ dev_vdbg(hsotg->dev, " hub port %d\n",
+ chan->hub_port);
+ dev_vdbg(hsotg->dev, " is_in %d\n",
+ chan->ep_is_in);
+ dev_vdbg(hsotg->dev, " Max Pkt %d\n",
+ chan->max_packet);
+ dev_vdbg(hsotg->dev, " xferlen %d\n",
+ chan->xfer_len);
+ }
+ }
+
+ writel(hcsplt, hsotg->regs + HCSPLT(hc_num));
+}
+
+/**
+ * dwc2_hc_halt() - Attempts to halt a host channel
+ *
+ * @hsotg: Controller register interface
+ * @chan: Host channel to halt
+ * @halt_status: Reason for halting the channel
+ *
+ * This function should only be called in Slave mode or to abort a transfer in
+ * either Slave mode or DMA mode. Under normal circumstances in DMA mode, the
+ * controller halts the channel when the transfer is complete or a condition
+ * occurs that requires application intervention.
+ *
+ * In slave mode, checks for a free request queue entry, then sets the Channel
+ * Enable and Channel Disable bits of the Host Channel Characteristics
+ * register of the specified channel to intiate the halt. If there is no free
+ * request queue entry, sets only the Channel Disable bit of the HCCHARn
+ * register to flush requests for this channel. In the latter case, sets a
+ * flag to indicate that the host channel needs to be halted when a request
+ * queue slot is open.
+ *
+ * In DMA mode, always sets the Channel Enable and Channel Disable bits of the
+ * HCCHARn register. The controller ensures there is space in the request
+ * queue before submitting the halt request.
+ *
+ * Some time may elapse before the core flushes any posted requests for this
+ * host channel and halts. The Channel Halted interrupt handler completes the
+ * deactivation of the host channel.
+ */
+void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
+ enum dwc2_halt_status halt_status)
+{
+ u32 nptxsts, hptxsts, hcchar;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+ if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS)
+ dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status);
+
+ if (halt_status == DWC2_HC_XFER_URB_DEQUEUE ||
+ halt_status == DWC2_HC_XFER_AHB_ERR) {
+ /*
+ * Disable all channel interrupts except Ch Halted. The QTD
+ * and QH state associated with this transfer has been cleared
+ * (in the case of URB_DEQUEUE), so the channel needs to be
+ * shut down carefully to prevent crashes.
+ */
+ u32 hcintmsk = HCINTMSK_CHHLTD;
+
+ dev_vdbg(hsotg->dev, "dequeue/error\n");
+ writel(hcintmsk, hsotg->regs + HCINTMSK(chan->hc_num));
+
+ /*
+ * Make sure no other interrupts besides halt are currently
+ * pending. Handling another interrupt could cause a crash due
+ * to the QTD and QH state.
+ */
+ writel(~hcintmsk, hsotg->regs + HCINT(chan->hc_num));
+
+ /*
+ * Make sure the halt status is set to URB_DEQUEUE or AHB_ERR
+ * even if the channel was already halted for some other
+ * reason
+ */
+ chan->halt_status = halt_status;
+
+ hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
+ if (!(hcchar & HCCHAR_CHENA)) {
+ /*
+ * The channel is either already halted or it hasn't
+ * started yet. In DMA mode, the transfer may halt if
+ * it finishes normally or a condition occurs that
+ * requires driver intervention. Don't want to halt
+ * the channel again. In either Slave or DMA mode,
+ * it's possible that the transfer has been assigned
+ * to a channel, but not started yet when an URB is
+ * dequeued. Don't want to halt a channel that hasn't
+ * started yet.
+ */
+ return;
+ }
+ }
+ if (chan->halt_pending) {
+ /*
+ * A halt has already been issued for this channel. This might
+ * happen when a transfer is aborted by a higher level in
+ * the stack.
+ */
+ dev_vdbg(hsotg->dev,
+ "*** %s: Channel %d, chan->halt_pending already set ***\n",
+ __func__, chan->hc_num);
+ return;
+ }
+
+ hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
+
+ /* No need to set the bit in DDMA for disabling the channel */
+ /* TODO check it everywhere channel is disabled */
+ if (hsotg->core_params->dma_desc_enable <= 0) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "desc DMA disabled\n");
+ hcchar |= HCCHAR_CHENA;
+ } else {
+ if (dbg_hc(chan))
+ dev_dbg(hsotg->dev, "desc DMA enabled\n");
+ }
+ hcchar |= HCCHAR_CHDIS;
+
+ if (hsotg->core_params->dma_enable <= 0) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "DMA not enabled\n");
+ hcchar |= HCCHAR_CHENA;
+
+ /* Check for space in the request queue to issue the halt */
+ if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
+ chan->ep_type == USB_ENDPOINT_XFER_BULK) {
+ dev_vdbg(hsotg->dev, "control/bulk\n");
+ nptxsts = readl(hsotg->regs + GNPTXSTS);
+ if ((nptxsts & TXSTS_QSPCAVAIL_MASK) == 0) {
+ dev_vdbg(hsotg->dev, "Disabling channel\n");
+ hcchar &= ~HCCHAR_CHENA;
+ }
+ } else {
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, "isoc/intr\n");
+ hptxsts = readl(hsotg->regs + HPTXSTS);
+ if ((hptxsts & TXSTS_QSPCAVAIL_MASK) == 0 ||
+ hsotg->queuing_high_bandwidth) {
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, "Disabling channel\n");
+ hcchar &= ~HCCHAR_CHENA;
+ }
+ }
+ } else {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "DMA enabled\n");
+ }
+
+ writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
+ chan->halt_status = halt_status;
+
+ if (hcchar & HCCHAR_CHENA) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "Channel enabled\n");
+ chan->halt_pending = 1;
+ chan->halt_on_queue = 0;
+ } else {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "Channel disabled\n");
+ chan->halt_on_queue = 1;
+ }
+
+ if (dbg_hc(chan)) {
+ dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
+ chan->hc_num);
+ dev_vdbg(hsotg->dev, " hcchar: 0x%08x\n",
+ hcchar);
+ dev_vdbg(hsotg->dev, " halt_pending: %d\n",
+ chan->halt_pending);
+ dev_vdbg(hsotg->dev, " halt_on_queue: %d\n",
+ chan->halt_on_queue);
+ dev_vdbg(hsotg->dev, " halt_status: %d\n",
+ chan->halt_status);
+ }
+}
+
+/**
+ * dwc2_hc_cleanup() - Clears the transfer state for a host channel
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Identifies the host channel to clean up
+ *
+ * This function is normally called after a transfer is done and the host
+ * channel is being released
+ */
+void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
+{
+ u32 hcintmsk;
+
+ chan->xfer_started = 0;
+
+ /*
+ * Clear channel interrupt enables and any unhandled channel interrupt
+ * conditions
+ */
+ writel(0, hsotg->regs + HCINTMSK(chan->hc_num));
+ hcintmsk = 0xffffffff;
+ hcintmsk &= ~HCINTMSK_RESERVED14_31;
+ writel(hcintmsk, hsotg->regs + HCINT(chan->hc_num));
+}
+
+/**
+ * dwc2_hc_set_even_odd_frame() - Sets the channel property that indicates in
+ * which frame a periodic transfer should occur
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Identifies the host channel to set up and its properties
+ * @hcchar: Current value of the HCCHAR register for the specified host channel
+ *
+ * This function has no effect on non-periodic transfers
+ */
+static void dwc2_hc_set_even_odd_frame(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, u32 *hcchar)
+{
+ if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ /* 1 if _next_ frame is odd, 0 if it's even */
+ if (!(dwc2_hcd_get_frame_number(hsotg) & 0x1))
+ *hcchar |= HCCHAR_ODDFRM;
+ }
+}
+
+static void dwc2_set_pid_isoc(struct dwc2_host_chan *chan)
+{
+ /* Set up the initial PID for the transfer */
+ if (chan->speed == USB_SPEED_HIGH) {
+ if (chan->ep_is_in) {
+ if (chan->multi_count == 1)
+ chan->data_pid_start = DWC2_HC_PID_DATA0;
+ else if (chan->multi_count == 2)
+ chan->data_pid_start = DWC2_HC_PID_DATA1;
+ else
+ chan->data_pid_start = DWC2_HC_PID_DATA2;
+ } else {
+ if (chan->multi_count == 1)
+ chan->data_pid_start = DWC2_HC_PID_DATA0;
+ else
+ chan->data_pid_start = DWC2_HC_PID_MDATA;
+ }
+ } else {
+ chan->data_pid_start = DWC2_HC_PID_DATA0;
+ }
+}
+
+/**
+ * dwc2_hc_write_packet() - Writes a packet into the Tx FIFO associated with
+ * the Host Channel
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Information needed to initialize the host channel
+ *
+ * This function should only be called in Slave mode. For a channel associated
+ * with a non-periodic EP, the non-periodic Tx FIFO is written. For a channel
+ * associated with a periodic EP, the periodic Tx FIFO is written.
+ *
+ * Upon return the xfer_buf and xfer_count fields in chan are incremented by
+ * the number of bytes written to the Tx FIFO.
+ */
+static void dwc2_hc_write_packet(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+ u32 i;
+ u32 remaining_count;
+ u32 byte_count;
+ u32 dword_count;
+ u32 __iomem *data_fifo;
+ u32 *data_buf = (u32 *)chan->xfer_buf;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ data_fifo = (u32 __iomem *)(hsotg->regs + HCFIFO(chan->hc_num));
+
+ remaining_count = chan->xfer_len - chan->xfer_count;
+ if (remaining_count > chan->max_packet)
+ byte_count = chan->max_packet;
+ else
+ byte_count = remaining_count;
+
+ dword_count = (byte_count + 3) / 4;
+
+ if (((unsigned long)data_buf & 0x3) == 0) {
+ /* xfer_buf is DWORD aligned */
+ for (i = 0; i < dword_count; i++, data_buf++)
+ writel(*data_buf, data_fifo);
+ } else {
+ /* xfer_buf is not DWORD aligned */
+ for (i = 0; i < dword_count; i++, data_buf++) {
+ u32 data = data_buf[0] | data_buf[1] << 8 |
+ data_buf[2] << 16 | data_buf[3] << 24;
+ writel(data, data_fifo);
+ }
+ }
+
+ chan->xfer_count += byte_count;
+ chan->xfer_buf += byte_count;
+}
+
+/**
+ * dwc2_hc_start_transfer() - Does the setup for a data transfer for a host
+ * channel and starts the transfer
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Information needed to initialize the host channel. The xfer_len value
+ * may be reduced to accommodate the max widths of the XferSize and
+ * PktCnt fields in the HCTSIZn register. The multi_count value may be
+ * changed to reflect the final xfer_len value.
+ *
+ * This function may be called in either Slave mode or DMA mode. In Slave mode,
+ * the caller must ensure that there is sufficient space in the request queue
+ * and Tx Data FIFO.
+ *
+ * For an OUT transfer in Slave mode, it loads a data packet into the
+ * appropriate FIFO. If necessary, additional data packets are loaded in the
+ * Host ISR.
+ *
+ * For an IN transfer in Slave mode, a data packet is requested. The data
+ * packets are unloaded from the Rx FIFO in the Host ISR. If necessary,
+ * additional data packets are requested in the Host ISR.
+ *
+ * For a PING transfer in Slave mode, the Do Ping bit is set in the HCTSIZ
+ * register along with a packet count of 1 and the channel is enabled. This
+ * causes a single PING transaction to occur. Other fields in HCTSIZ are
+ * simply set to 0 since no data transfer occurs in this case.
+ *
+ * For a PING transfer in DMA mode, the HCTSIZ register is initialized with
+ * all the information required to perform the subsequent data transfer. In
+ * addition, the Do Ping bit is set in the HCTSIZ register. In this case, the
+ * controller performs the entire PING protocol, then starts the data
+ * transfer.
+ */
+void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+ u32 max_hc_xfer_size = hsotg->core_params->max_transfer_size;
+ u16 max_hc_pkt_count = hsotg->core_params->max_packet_count;
+ u32 hcchar;
+ u32 hctsiz = 0;
+ u16 num_packets;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ if (chan->do_ping) {
+ if (hsotg->core_params->dma_enable <= 0) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "ping, no DMA\n");
+ dwc2_hc_do_ping(hsotg, chan);
+ chan->xfer_started = 1;
+ return;
+ } else {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "ping, DMA\n");
+ hctsiz |= TSIZ_DOPNG;
+ }
+ }
+
+ if (chan->do_split) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "split\n");
+ num_packets = 1;
+
+ if (chan->complete_split && !chan->ep_is_in)
+ /*
+ * For CSPLIT OUT Transfer, set the size to 0 so the
+ * core doesn't expect any data written to the FIFO
+ */
+ chan->xfer_len = 0;
+ else if (chan->ep_is_in || chan->xfer_len > chan->max_packet)
+ chan->xfer_len = chan->max_packet;
+ else if (!chan->ep_is_in && chan->xfer_len > 188)
+ chan->xfer_len = 188;
+
+ hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
+ TSIZ_XFERSIZE_MASK;
+ } else {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "no split\n");
+ /*
+ * Ensure that the transfer length and packet count will fit
+ * in the widths allocated for them in the HCTSIZn register
+ */
+ if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ /*
+ * Make sure the transfer size is no larger than one
+ * (micro)frame's worth of data. (A check was done
+ * when the periodic transfer was accepted to ensure
+ * that a (micro)frame's worth of data can be
+ * programmed into a channel.)
+ */
+ u32 max_periodic_len =
+ chan->multi_count * chan->max_packet;
+
+ if (chan->xfer_len > max_periodic_len)
+ chan->xfer_len = max_periodic_len;
+ } else if (chan->xfer_len > max_hc_xfer_size) {
+ /*
+ * Make sure that xfer_len is a multiple of max packet
+ * size
+ */
+ chan->xfer_len =
+ max_hc_xfer_size - chan->max_packet + 1;
+ }
+
+ if (chan->xfer_len > 0) {
+ num_packets = (chan->xfer_len + chan->max_packet - 1) /
+ chan->max_packet;
+ if (num_packets > max_hc_pkt_count) {
+ num_packets = max_hc_pkt_count;
+ chan->xfer_len = num_packets * chan->max_packet;
+ }
+ } else {
+ /* Need 1 packet for transfer length of 0 */
+ num_packets = 1;
+ }
+
+ if (chan->ep_is_in)
+ /*
+ * Always program an integral # of max packets for IN
+ * transfers
+ */
+ chan->xfer_len = num_packets * chan->max_packet;
+
+ if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC)
+ /*
+ * Make sure that the multi_count field matches the
+ * actual transfer length
+ */
+ chan->multi_count = num_packets;
+
+ if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
+ dwc2_set_pid_isoc(chan);
+
+ hctsiz |= chan->xfer_len << TSIZ_XFERSIZE_SHIFT &
+ TSIZ_XFERSIZE_MASK;
+ }
+
+ chan->start_pkt_count = num_packets;
+ hctsiz |= num_packets << TSIZ_PKTCNT_SHIFT & TSIZ_PKTCNT_MASK;
+ hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
+ TSIZ_SC_MC_PID_MASK;
+ writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
+ if (dbg_hc(chan)) {
+ dev_vdbg(hsotg->dev, "Wrote %08x to HCTSIZ(%d)\n",
+ hctsiz, chan->hc_num);
+
+ dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
+ chan->hc_num);
+ dev_vdbg(hsotg->dev, " Xfer Size: %d\n",
+ (hctsiz & TSIZ_XFERSIZE_MASK) >>
+ TSIZ_XFERSIZE_SHIFT);
+ dev_vdbg(hsotg->dev, " Num Pkts: %d\n",
+ (hctsiz & TSIZ_PKTCNT_MASK) >>
+ TSIZ_PKTCNT_SHIFT);
+ dev_vdbg(hsotg->dev, " Start PID: %d\n",
+ (hctsiz & TSIZ_SC_MC_PID_MASK) >>
+ TSIZ_SC_MC_PID_SHIFT);
+ }
+
+ if (hsotg->core_params->dma_enable > 0) {
+ dma_addr_t dma_addr;
+
+ if (chan->align_buf) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "align_buf\n");
+ dma_addr = chan->align_buf;
+ } else {
+ dma_addr = chan->xfer_dma;
+ }
+ writel((u32)dma_addr, hsotg->regs + HCDMA(chan->hc_num));
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "Wrote %08lx to HCDMA(%d)\n",
+ (unsigned long)dma_addr, chan->hc_num);
+ }
+
+ /* Start the split */
+ if (chan->do_split) {
+ u32 hcsplt = readl(hsotg->regs + HCSPLT(chan->hc_num));
+
+ hcsplt |= HCSPLT_SPLTENA;
+ writel(hcsplt, hsotg->regs + HCSPLT(chan->hc_num));
+ }
+
+ hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
+ hcchar &= ~HCCHAR_MULTICNT_MASK;
+ hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT &
+ HCCHAR_MULTICNT_MASK;
+ dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
+
+ if (hcchar & HCCHAR_CHDIS)
+ dev_warn(hsotg->dev,
+ "%s: chdis set, channel %d, hcchar 0x%08x\n",
+ __func__, chan->hc_num, hcchar);
+
+ /* Set host channel enable after all other setup is complete */
+ hcchar |= HCCHAR_CHENA;
+ hcchar &= ~HCCHAR_CHDIS;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
+ (hcchar & HCCHAR_MULTICNT_MASK) >>
+ HCCHAR_MULTICNT_SHIFT);
+
+ writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
+ chan->hc_num);
+
+ chan->xfer_started = 1;
+ chan->requests++;
+
+ if (hsotg->core_params->dma_enable <= 0 &&
+ !chan->ep_is_in && chan->xfer_len > 0)
+ /* Load OUT packet into the appropriate Tx FIFO */
+ dwc2_hc_write_packet(hsotg, chan);
+}
+
+/**
+ * dwc2_hc_start_transfer_ddma() - Does the setup for a data transfer for a
+ * host channel and starts the transfer in Descriptor DMA mode
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Information needed to initialize the host channel
+ *
+ * Initializes HCTSIZ register. For a PING transfer the Do Ping bit is set.
+ * Sets PID and NTD values. For periodic transfers initializes SCHED_INFO field
+ * with micro-frame bitmap.
+ *
+ * Initializes HCDMA register with descriptor list address and CTD value then
+ * starts the transfer via enabling the channel.
+ */
+void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+ u32 hcchar;
+ u32 hc_dma;
+ u32 hctsiz = 0;
+
+ if (chan->do_ping)
+ hctsiz |= TSIZ_DOPNG;
+
+ if (chan->ep_type == USB_ENDPOINT_XFER_ISOC)
+ dwc2_set_pid_isoc(chan);
+
+ /* Packet Count and Xfer Size are not used in Descriptor DMA mode */
+ hctsiz |= chan->data_pid_start << TSIZ_SC_MC_PID_SHIFT &
+ TSIZ_SC_MC_PID_MASK;
+
+ /* 0 - 1 descriptor, 1 - 2 descriptors, etc */
+ hctsiz |= (chan->ntd - 1) << TSIZ_NTD_SHIFT & TSIZ_NTD_MASK;
+
+ /* Non-zero only for high-speed interrupt endpoints */
+ hctsiz |= chan->schinfo << TSIZ_SCHINFO_SHIFT & TSIZ_SCHINFO_MASK;
+
+ if (dbg_hc(chan)) {
+ dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
+ chan->hc_num);
+ dev_vdbg(hsotg->dev, " Start PID: %d\n",
+ chan->data_pid_start);
+ dev_vdbg(hsotg->dev, " NTD: %d\n", chan->ntd - 1);
+ }
+
+ writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
+
+ hc_dma = (u32)chan->desc_list_addr & HCDMA_DMA_ADDR_MASK;
+
+ /* Always start from first descriptor */
+ hc_dma &= ~HCDMA_CTD_MASK;
+ writel(hc_dma, hsotg->regs + HCDMA(chan->hc_num));
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "Wrote %08x to HCDMA(%d)\n",
+ hc_dma, chan->hc_num);
+
+ hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
+ hcchar &= ~HCCHAR_MULTICNT_MASK;
+ hcchar |= chan->multi_count << HCCHAR_MULTICNT_SHIFT &
+ HCCHAR_MULTICNT_MASK;
+
+ if (hcchar & HCCHAR_CHDIS)
+ dev_warn(hsotg->dev,
+ "%s: chdis set, channel %d, hcchar 0x%08x\n",
+ __func__, chan->hc_num, hcchar);
+
+ /* Set host channel enable after all other setup is complete */
+ hcchar |= HCCHAR_CHENA;
+ hcchar &= ~HCCHAR_CHDIS;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, " Multi Cnt: %d\n",
+ (hcchar & HCCHAR_MULTICNT_MASK) >>
+ HCCHAR_MULTICNT_SHIFT);
+
+ writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "Wrote %08x to HCCHAR(%d)\n", hcchar,
+ chan->hc_num);
+
+ chan->xfer_started = 1;
+ chan->requests++;
+}
+
+/**
+ * dwc2_hc_continue_transfer() - Continues a data transfer that was started by
+ * a previous call to dwc2_hc_start_transfer()
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Information needed to initialize the host channel
+ *
+ * The caller must ensure there is sufficient space in the request queue and Tx
+ * Data FIFO. This function should only be called in Slave mode. In DMA mode,
+ * the controller acts autonomously to complete transfers programmed to a host
+ * channel.
+ *
+ * For an OUT transfer, a new data packet is loaded into the appropriate FIFO
+ * if there is any data remaining to be queued. For an IN transfer, another
+ * data packet is always requested. For the SETUP phase of a control transfer,
+ * this function does nothing.
+ *
+ * Return: 1 if a new request is queued, 0 if no more requests are required
+ * for this transfer
+ */
+int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
+ chan->hc_num);
+
+ if (chan->do_split)
+ /* SPLITs always queue just once per channel */
+ return 0;
+
+ if (chan->data_pid_start == DWC2_HC_PID_SETUP)
+ /* SETUPs are queued only once since they can't be NAK'd */
+ return 0;
+
+ if (chan->ep_is_in) {
+ /*
+ * Always queue another request for other IN transfers. If
+ * back-to-back INs are issued and NAKs are received for both,
+ * the driver may still be processing the first NAK when the
+ * second NAK is received. When the interrupt handler clears
+ * the NAK interrupt for the first NAK, the second NAK will
+ * not be seen. So we can't depend on the NAK interrupt
+ * handler to requeue a NAK'd request. Instead, IN requests
+ * are issued each time this function is called. When the
+ * transfer completes, the extra requests for the channel will
+ * be flushed.
+ */
+ u32 hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
+
+ dwc2_hc_set_even_odd_frame(hsotg, chan, &hcchar);
+ hcchar |= HCCHAR_CHENA;
+ hcchar &= ~HCCHAR_CHDIS;
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, " IN xfer: hcchar = 0x%08x\n",
+ hcchar);
+ writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
+ chan->requests++;
+ return 1;
+ }
+
+ /* OUT transfers */
+
+ if (chan->xfer_count < chan->xfer_len) {
+ if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ u32 hcchar = readl(hsotg->regs +
+ HCCHAR(chan->hc_num));
+
+ dwc2_hc_set_even_odd_frame(hsotg, chan,
+ &hcchar);
+ }
+
+ /* Load OUT packet into the appropriate Tx FIFO */
+ dwc2_hc_write_packet(hsotg, chan);
+ chan->requests++;
+ return 1;
+ }
+
+ return 0;
+}
+
+/**
+ * dwc2_hc_do_ping() - Starts a PING transfer
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Information needed to initialize the host channel
+ *
+ * This function should only be called in Slave mode. The Do Ping bit is set in
+ * the HCTSIZ register, then the channel is enabled.
+ */
+void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan)
+{
+ u32 hcchar;
+ u32 hctsiz;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "%s: Channel %d\n", __func__,
+ chan->hc_num);
+
+
+ hctsiz = TSIZ_DOPNG;
+ hctsiz |= 1 << TSIZ_PKTCNT_SHIFT;
+ writel(hctsiz, hsotg->regs + HCTSIZ(chan->hc_num));
+
+ hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
+ hcchar |= HCCHAR_CHENA;
+ hcchar &= ~HCCHAR_CHDIS;
+ writel(hcchar, hsotg->regs + HCCHAR(chan->hc_num));
+}
+
+/**
+ * dwc2_calc_frame_interval() - Calculates the correct frame Interval value for
+ * the HFIR register according to PHY type and speed
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ *
+ * NOTE: The caller can modify the value of the HFIR register only after the
+ * Port Enable bit of the Host Port Control and Status register (HPRT.EnaPort)
+ * has been set
+ */
+u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg)
+{
+ u32 usbcfg;
+ u32 hprt0;
+ int clock = 60; /* default value */
+
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+ hprt0 = readl(hsotg->regs + HPRT0);
+
+ if (!(usbcfg & GUSBCFG_PHYSEL) && (usbcfg & GUSBCFG_ULPI_UTMI_SEL) &&
+ !(usbcfg & GUSBCFG_PHYIF16))
+ clock = 60;
+ if ((usbcfg & GUSBCFG_PHYSEL) && hsotg->hw_params.fs_phy_type ==
+ GHWCFG2_FS_PHY_TYPE_SHARED_ULPI)
+ clock = 48;
+ if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
+ !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
+ clock = 30;
+ if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
+ !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && !(usbcfg & GUSBCFG_PHYIF16))
+ clock = 60;
+ if ((usbcfg & GUSBCFG_PHY_LP_CLK_SEL) && !(usbcfg & GUSBCFG_PHYSEL) &&
+ !(usbcfg & GUSBCFG_ULPI_UTMI_SEL) && (usbcfg & GUSBCFG_PHYIF16))
+ clock = 48;
+ if ((usbcfg & GUSBCFG_PHYSEL) && !(usbcfg & GUSBCFG_PHYIF16) &&
+ hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_SHARED_UTMI)
+ clock = 48;
+ if ((usbcfg & GUSBCFG_PHYSEL) &&
+ hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
+ clock = 48;
+
+ if ((hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT == HPRT0_SPD_HIGH_SPEED)
+ /* High speed case */
+ return 125 * clock;
+ else
+ /* FS/LS case */
+ return 1000 * clock;
+}
+
+/**
+ * dwc2_read_packet() - Reads a packet from the Rx FIFO into the destination
+ * buffer
+ *
+ * @core_if: Programming view of DWC_otg controller
+ * @dest: Destination buffer for the packet
+ * @bytes: Number of bytes to copy to the destination
+ */
+void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes)
+{
+ u32 __iomem *fifo = hsotg->regs + HCFIFO(0);
+ u32 *data_buf = (u32 *)dest;
+ int word_count = (bytes + 3) / 4;
+ int i;
+
+ /*
+ * Todo: Account for the case where dest is not dword aligned. This
+ * requires reading data from the FIFO into a u32 temp buffer, then
+ * moving it into the data buffer.
+ */
+
+ dev_vdbg(hsotg->dev, "%s(%p,%p,%d)\n", __func__, hsotg, dest, bytes);
+
+ for (i = 0; i < word_count; i++, data_buf++)
+ *data_buf = readl(fifo);
+}
+
+/**
+ * dwc2_dump_host_registers() - Prints the host registers
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ *
+ * NOTE: This function will be removed once the peripheral controller code
+ * is integrated and the driver is stable
+ */
+void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg)
+{
+#ifdef DEBUG
+ u32 __iomem *addr;
+ int i;
+
+ dev_dbg(hsotg->dev, "Host Global Registers\n");
+ addr = hsotg->regs + HCFG;
+ dev_dbg(hsotg->dev, "HCFG @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HFIR;
+ dev_dbg(hsotg->dev, "HFIR @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HFNUM;
+ dev_dbg(hsotg->dev, "HFNUM @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HPTXSTS;
+ dev_dbg(hsotg->dev, "HPTXSTS @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HAINT;
+ dev_dbg(hsotg->dev, "HAINT @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HAINTMSK;
+ dev_dbg(hsotg->dev, "HAINTMSK @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ addr = hsotg->regs + HFLBADDR;
+ dev_dbg(hsotg->dev, "HFLBADDR @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ }
+
+ addr = hsotg->regs + HPRT0;
+ dev_dbg(hsotg->dev, "HPRT0 @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+
+ for (i = 0; i < hsotg->core_params->host_channels; i++) {
+ dev_dbg(hsotg->dev, "Host Channel %d Specific Registers\n", i);
+ addr = hsotg->regs + HCCHAR(i);
+ dev_dbg(hsotg->dev, "HCCHAR @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HCSPLT(i);
+ dev_dbg(hsotg->dev, "HCSPLT @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HCINT(i);
+ dev_dbg(hsotg->dev, "HCINT @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HCINTMSK(i);
+ dev_dbg(hsotg->dev, "HCINTMSK @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HCTSIZ(i);
+ dev_dbg(hsotg->dev, "HCTSIZ @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HCDMA(i);
+ dev_dbg(hsotg->dev, "HCDMA @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ addr = hsotg->regs + HCDMAB(i);
+ dev_dbg(hsotg->dev, "HCDMAB @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ }
+ }
+#endif
+}
+
+/**
+ * dwc2_dump_global_registers() - Prints the core global registers
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ *
+ * NOTE: This function will be removed once the peripheral controller code
+ * is integrated and the driver is stable
+ */
+void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg)
+{
+#ifdef DEBUG
+ u32 __iomem *addr;
+
+ dev_dbg(hsotg->dev, "Core Global Registers\n");
+ addr = hsotg->regs + GOTGCTL;
+ dev_dbg(hsotg->dev, "GOTGCTL @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GOTGINT;
+ dev_dbg(hsotg->dev, "GOTGINT @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GAHBCFG;
+ dev_dbg(hsotg->dev, "GAHBCFG @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GUSBCFG;
+ dev_dbg(hsotg->dev, "GUSBCFG @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GRSTCTL;
+ dev_dbg(hsotg->dev, "GRSTCTL @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GINTSTS;
+ dev_dbg(hsotg->dev, "GINTSTS @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GINTMSK;
+ dev_dbg(hsotg->dev, "GINTMSK @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GRXSTSR;
+ dev_dbg(hsotg->dev, "GRXSTSR @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GRXFSIZ;
+ dev_dbg(hsotg->dev, "GRXFSIZ @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GNPTXFSIZ;
+ dev_dbg(hsotg->dev, "GNPTXFSIZ @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GNPTXSTS;
+ dev_dbg(hsotg->dev, "GNPTXSTS @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GI2CCTL;
+ dev_dbg(hsotg->dev, "GI2CCTL @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GPVNDCTL;
+ dev_dbg(hsotg->dev, "GPVNDCTL @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GGPIO;
+ dev_dbg(hsotg->dev, "GGPIO @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GUID;
+ dev_dbg(hsotg->dev, "GUID @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GSNPSID;
+ dev_dbg(hsotg->dev, "GSNPSID @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GHWCFG1;
+ dev_dbg(hsotg->dev, "GHWCFG1 @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GHWCFG2;
+ dev_dbg(hsotg->dev, "GHWCFG2 @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GHWCFG3;
+ dev_dbg(hsotg->dev, "GHWCFG3 @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GHWCFG4;
+ dev_dbg(hsotg->dev, "GHWCFG4 @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GLPMCFG;
+ dev_dbg(hsotg->dev, "GLPMCFG @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GPWRDN;
+ dev_dbg(hsotg->dev, "GPWRDN @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + GDFIFOCFG;
+ dev_dbg(hsotg->dev, "GDFIFOCFG @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+ addr = hsotg->regs + HPTXFSIZ;
+ dev_dbg(hsotg->dev, "HPTXFSIZ @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+
+ addr = hsotg->regs + PCGCTL;
+ dev_dbg(hsotg->dev, "PCGCTL @0x%08lX : 0x%08X\n",
+ (unsigned long)addr, readl(addr));
+#endif
+}
+
+/**
+ * dwc2_flush_tx_fifo() - Flushes a Tx FIFO
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @num: Tx FIFO to flush
+ */
+void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num)
+{
+ u32 greset;
+ int count = 0;
+
+ dev_vdbg(hsotg->dev, "Flush Tx FIFO %d\n", num);
+
+ greset = GRSTCTL_TXFFLSH;
+ greset |= num << GRSTCTL_TXFNUM_SHIFT & GRSTCTL_TXFNUM_MASK;
+ writel(greset, hsotg->regs + GRSTCTL);
+
+ do {
+ greset = readl(hsotg->regs + GRSTCTL);
+ if (++count > 10000) {
+ dev_warn(hsotg->dev,
+ "%s() HANG! GRSTCTL=%0x GNPTXSTS=0x%08x\n",
+ __func__, greset,
+ readl(hsotg->regs + GNPTXSTS));
+ break;
+ }
+ udelay(1);
+ } while (greset & GRSTCTL_TXFFLSH);
+
+ /* Wait for at least 3 PHY Clocks */
+ udelay(1);
+}
+
+/**
+ * dwc2_flush_rx_fifo() - Flushes the Rx FIFO
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg)
+{
+ u32 greset;
+ int count = 0;
+
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ greset = GRSTCTL_RXFFLSH;
+ writel(greset, hsotg->regs + GRSTCTL);
+
+ do {
+ greset = readl(hsotg->regs + GRSTCTL);
+ if (++count > 10000) {
+ dev_warn(hsotg->dev, "%s() HANG! GRSTCTL=%0x\n",
+ __func__, greset);
+ break;
+ }
+ udelay(1);
+ } while (greset & GRSTCTL_RXFFLSH);
+
+ /* Wait for at least 3 PHY Clocks */
+ udelay(1);
+}
+
+#define DWC2_OUT_OF_BOUNDS(a, b, c) ((a) < (b) || (a) > (c))
+
+/* Parameter access functions */
+void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ switch (val) {
+ case DWC2_CAP_PARAM_HNP_SRP_CAPABLE:
+ if (hsotg->hw_params.op_mode != GHWCFG2_OP_MODE_HNP_SRP_CAPABLE)
+ valid = 0;
+ break;
+ case DWC2_CAP_PARAM_SRP_ONLY_CAPABLE:
+ switch (hsotg->hw_params.op_mode) {
+ case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
+ case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
+ case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
+ case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
+ break;
+ default:
+ valid = 0;
+ break;
+ }
+ break;
+ case DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE:
+ /* always valid */
+ break;
+ default:
+ valid = 0;
+ break;
+ }
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for otg_cap parameter. Check HW configuration.\n",
+ val);
+ switch (hsotg->hw_params.op_mode) {
+ case GHWCFG2_OP_MODE_HNP_SRP_CAPABLE:
+ val = DWC2_CAP_PARAM_HNP_SRP_CAPABLE;
+ break;
+ case GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE:
+ case GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE:
+ case GHWCFG2_OP_MODE_SRP_CAPABLE_HOST:
+ val = DWC2_CAP_PARAM_SRP_ONLY_CAPABLE;
+ break;
+ default:
+ val = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
+ break;
+ }
+ dev_dbg(hsotg->dev, "Setting otg_cap to %d\n", val);
+ }
+
+ hsotg->core_params->otg_cap = val;
+}
+
+void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val > 0 && hsotg->hw_params.arch == GHWCFG2_SLAVE_ONLY_ARCH)
+ valid = 0;
+ if (val < 0)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for dma_enable parameter. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.arch != GHWCFG2_SLAVE_ONLY_ARCH;
+ dev_dbg(hsotg->dev, "Setting dma_enable to %d\n", val);
+ }
+
+ hsotg->core_params->dma_enable = val;
+}
+
+void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val > 0 && (hsotg->core_params->dma_enable <= 0 ||
+ !hsotg->hw_params.dma_desc_enable))
+ valid = 0;
+ if (val < 0)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for dma_desc_enable parameter. Check HW configuration.\n",
+ val);
+ val = (hsotg->core_params->dma_enable > 0 &&
+ hsotg->hw_params.dma_desc_enable);
+ dev_dbg(hsotg->dev, "Setting dma_desc_enable to %d\n", val);
+ }
+
+ hsotg->core_params->dma_desc_enable = val;
+}
+
+void dwc2_set_param_host_support_fs_ls_low_power(struct dwc2_hsotg *hsotg,
+ int val)
+{
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "Wrong value for host_support_fs_low_power\n");
+ dev_err(hsotg->dev,
+ "host_support_fs_low_power must be 0 or 1\n");
+ }
+ val = 0;
+ dev_dbg(hsotg->dev,
+ "Setting host_support_fs_low_power to %d\n", val);
+ }
+
+ hsotg->core_params->host_support_fs_ls_low_power = val;
+}
+
+void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val > 0 && !hsotg->hw_params.enable_dynamic_fifo)
+ valid = 0;
+ if (val < 0)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for enable_dynamic_fifo parameter. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.enable_dynamic_fifo;
+ dev_dbg(hsotg->dev, "Setting enable_dynamic_fifo to %d\n", val);
+ }
+
+ hsotg->core_params->enable_dynamic_fifo = val;
+}
+
+void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val < 16 || val > hsotg->hw_params.host_rx_fifo_size)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for host_rx_fifo_size. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.host_rx_fifo_size;
+ dev_dbg(hsotg->dev, "Setting host_rx_fifo_size to %d\n", val);
+ }
+
+ hsotg->core_params->host_rx_fifo_size = val;
+}
+
+void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val < 16 || val > hsotg->hw_params.host_nperio_tx_fifo_size)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for host_nperio_tx_fifo_size. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.host_nperio_tx_fifo_size;
+ dev_dbg(hsotg->dev, "Setting host_nperio_tx_fifo_size to %d\n",
+ val);
+ }
+
+ hsotg->core_params->host_nperio_tx_fifo_size = val;
+}
+
+void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val < 16 || val > hsotg->hw_params.host_perio_tx_fifo_size)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for host_perio_tx_fifo_size. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.host_perio_tx_fifo_size;
+ dev_dbg(hsotg->dev, "Setting host_perio_tx_fifo_size to %d\n",
+ val);
+ }
+
+ hsotg->core_params->host_perio_tx_fifo_size = val;
+}
+
+void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val < 2047 || val > hsotg->hw_params.max_transfer_size)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for max_transfer_size. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.max_transfer_size;
+ dev_dbg(hsotg->dev, "Setting max_transfer_size to %d\n", val);
+ }
+
+ hsotg->core_params->max_transfer_size = val;
+}
+
+void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val < 15 || val > hsotg->hw_params.max_packet_count)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for max_packet_count. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.max_packet_count;
+ dev_dbg(hsotg->dev, "Setting max_packet_count to %d\n", val);
+ }
+
+ hsotg->core_params->max_packet_count = val;
+}
+
+void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (val < 1 || val > hsotg->hw_params.host_channels)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for host_channels. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.host_channels;
+ dev_dbg(hsotg->dev, "Setting host_channels to %d\n", val);
+ }
+
+ hsotg->core_params->host_channels = val;
+}
+
+void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 0;
+ u32 hs_phy_type, fs_phy_type;
+
+ if (DWC2_OUT_OF_BOUNDS(val, DWC2_PHY_TYPE_PARAM_FS,
+ DWC2_PHY_TYPE_PARAM_ULPI)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev, "Wrong value for phy_type\n");
+ dev_err(hsotg->dev, "phy_type must be 0, 1 or 2\n");
+ }
+
+ valid = 0;
+ }
+
+ hs_phy_type = hsotg->hw_params.hs_phy_type;
+ fs_phy_type = hsotg->hw_params.fs_phy_type;
+ if (val == DWC2_PHY_TYPE_PARAM_UTMI &&
+ (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
+ hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
+ valid = 1;
+ else if (val == DWC2_PHY_TYPE_PARAM_ULPI &&
+ (hs_phy_type == GHWCFG2_HS_PHY_TYPE_ULPI ||
+ hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI))
+ valid = 1;
+ else if (val == DWC2_PHY_TYPE_PARAM_FS &&
+ fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED)
+ valid = 1;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for phy_type. Check HW configuration.\n",
+ val);
+ val = DWC2_PHY_TYPE_PARAM_FS;
+ if (hs_phy_type != GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED) {
+ if (hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI ||
+ hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI_ULPI)
+ val = DWC2_PHY_TYPE_PARAM_UTMI;
+ else
+ val = DWC2_PHY_TYPE_PARAM_ULPI;
+ }
+ dev_dbg(hsotg->dev, "Setting phy_type to %d\n", val);
+ }
+
+ hsotg->core_params->phy_type = val;
+}
+
+static int dwc2_get_param_phy_type(struct dwc2_hsotg *hsotg)
+{
+ return hsotg->core_params->phy_type;
+}
+
+void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev, "Wrong value for speed parameter\n");
+ dev_err(hsotg->dev, "max_speed parameter must be 0 or 1\n");
+ }
+ valid = 0;
+ }
+
+ if (val == DWC2_SPEED_PARAM_HIGH &&
+ dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for speed parameter. Check HW configuration.\n",
+ val);
+ val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS ?
+ DWC2_SPEED_PARAM_FULL : DWC2_SPEED_PARAM_HIGH;
+ dev_dbg(hsotg->dev, "Setting speed to %d\n", val);
+ }
+
+ hsotg->core_params->speed = val;
+}
+
+void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (DWC2_OUT_OF_BOUNDS(val, DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ,
+ DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "Wrong value for host_ls_low_power_phy_clk parameter\n");
+ dev_err(hsotg->dev,
+ "host_ls_low_power_phy_clk must be 0 or 1\n");
+ }
+ valid = 0;
+ }
+
+ if (val == DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ &&
+ dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for host_ls_low_power_phy_clk. Check HW configuration.\n",
+ val);
+ val = dwc2_get_param_phy_type(hsotg) == DWC2_PHY_TYPE_PARAM_FS
+ ? DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ
+ : DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ;
+ dev_dbg(hsotg->dev, "Setting host_ls_low_power_phy_clk to %d\n",
+ val);
+ }
+
+ hsotg->core_params->host_ls_low_power_phy_clk = val;
+}
+
+void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val)
+{
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev, "Wrong value for phy_ulpi_ddr\n");
+ dev_err(hsotg->dev, "phy_upli_ddr must be 0 or 1\n");
+ }
+ val = 0;
+ dev_dbg(hsotg->dev, "Setting phy_upli_ddr to %d\n", val);
+ }
+
+ hsotg->core_params->phy_ulpi_ddr = val;
+}
+
+void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val)
+{
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "Wrong value for phy_ulpi_ext_vbus\n");
+ dev_err(hsotg->dev,
+ "phy_ulpi_ext_vbus must be 0 or 1\n");
+ }
+ val = 0;
+ dev_dbg(hsotg->dev, "Setting phy_ulpi_ext_vbus to %d\n", val);
+ }
+
+ hsotg->core_params->phy_ulpi_ext_vbus = val;
+}
+
+void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 0;
+
+ switch (hsotg->hw_params.utmi_phy_data_width) {
+ case GHWCFG4_UTMI_PHY_DATA_WIDTH_8:
+ valid = (val == 8);
+ break;
+ case GHWCFG4_UTMI_PHY_DATA_WIDTH_16:
+ valid = (val == 16);
+ break;
+ case GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16:
+ valid = (val == 8 || val == 16);
+ break;
+ }
+
+ if (!valid) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "%d invalid for phy_utmi_width. Check HW configuration.\n",
+ val);
+ }
+ val = (hsotg->hw_params.utmi_phy_data_width ==
+ GHWCFG4_UTMI_PHY_DATA_WIDTH_8) ? 8 : 16;
+ dev_dbg(hsotg->dev, "Setting phy_utmi_width to %d\n", val);
+ }
+
+ hsotg->core_params->phy_utmi_width = val;
+}
+
+void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val)
+{
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev, "Wrong value for ulpi_fs_ls\n");
+ dev_err(hsotg->dev, "ulpi_fs_ls must be 0 or 1\n");
+ }
+ val = 0;
+ dev_dbg(hsotg->dev, "Setting ulpi_fs_ls to %d\n", val);
+ }
+
+ hsotg->core_params->ulpi_fs_ls = val;
+}
+
+void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val)
+{
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev, "Wrong value for ts_dline\n");
+ dev_err(hsotg->dev, "ts_dline must be 0 or 1\n");
+ }
+ val = 0;
+ dev_dbg(hsotg->dev, "Setting ts_dline to %d\n", val);
+ }
+
+ hsotg->core_params->ts_dline = val;
+}
+
+void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev, "Wrong value for i2c_enable\n");
+ dev_err(hsotg->dev, "i2c_enable must be 0 or 1\n");
+ }
+
+ valid = 0;
+ }
+
+ if (val == 1 && !(hsotg->hw_params.i2c_enable))
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for i2c_enable. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.i2c_enable;
+ dev_dbg(hsotg->dev, "Setting i2c_enable to %d\n", val);
+ }
+
+ hsotg->core_params->i2c_enable = val;
+}
+
+void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "Wrong value for en_multiple_tx_fifo,\n");
+ dev_err(hsotg->dev,
+ "en_multiple_tx_fifo must be 0 or 1\n");
+ }
+ valid = 0;
+ }
+
+ if (val == 1 && !hsotg->hw_params.en_multiple_tx_fifo)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for parameter en_multiple_tx_fifo. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.en_multiple_tx_fifo;
+ dev_dbg(hsotg->dev, "Setting en_multiple_tx_fifo to %d\n", val);
+ }
+
+ hsotg->core_params->en_multiple_tx_fifo = val;
+}
+
+void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val)
+{
+ int valid = 1;
+
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "'%d' invalid for parameter reload_ctl\n", val);
+ dev_err(hsotg->dev, "reload_ctl must be 0 or 1\n");
+ }
+ valid = 0;
+ }
+
+ if (val == 1 && hsotg->hw_params.snpsid < DWC2_CORE_REV_2_92a)
+ valid = 0;
+
+ if (!valid) {
+ if (val >= 0)
+ dev_err(hsotg->dev,
+ "%d invalid for parameter reload_ctl. Check HW configuration.\n",
+ val);
+ val = hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_92a;
+ dev_dbg(hsotg->dev, "Setting reload_ctl to %d\n", val);
+ }
+
+ hsotg->core_params->reload_ctl = val;
+}
+
+void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val)
+{
+ if (val != -1)
+ hsotg->core_params->ahbcfg = val;
+ else
+ hsotg->core_params->ahbcfg = GAHBCFG_HBSTLEN_INCR4 <<
+ GAHBCFG_HBSTLEN_SHIFT;
+}
+
+void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val)
+{
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "'%d' invalid for parameter otg_ver\n", val);
+ dev_err(hsotg->dev,
+ "otg_ver must be 0 (for OTG 1.3 support) or 1 (for OTG 2.0 support)\n");
+ }
+ val = 0;
+ dev_dbg(hsotg->dev, "Setting otg_ver to %d\n", val);
+ }
+
+ hsotg->core_params->otg_ver = val;
+}
+
+static void dwc2_set_param_uframe_sched(struct dwc2_hsotg *hsotg, int val)
+{
+ if (DWC2_OUT_OF_BOUNDS(val, 0, 1)) {
+ if (val >= 0) {
+ dev_err(hsotg->dev,
+ "'%d' invalid for parameter uframe_sched\n",
+ val);
+ dev_err(hsotg->dev, "uframe_sched must be 0 or 1\n");
+ }
+ val = 1;
+ dev_dbg(hsotg->dev, "Setting uframe_sched to %d\n", val);
+ }
+
+ hsotg->core_params->uframe_sched = val;
+}
+
+/*
+ * This function is called during module intialization to pass module parameters
+ * for the DWC_otg core.
+ */
+void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
+ const struct dwc2_core_params *params)
+{
+ dev_dbg(hsotg->dev, "%s()\n", __func__);
+
+ dwc2_set_param_otg_cap(hsotg, params->otg_cap);
+ dwc2_set_param_dma_enable(hsotg, params->dma_enable);
+ dwc2_set_param_dma_desc_enable(hsotg, params->dma_desc_enable);
+ dwc2_set_param_host_support_fs_ls_low_power(hsotg,
+ params->host_support_fs_ls_low_power);
+ dwc2_set_param_enable_dynamic_fifo(hsotg,
+ params->enable_dynamic_fifo);
+ dwc2_set_param_host_rx_fifo_size(hsotg,
+ params->host_rx_fifo_size);
+ dwc2_set_param_host_nperio_tx_fifo_size(hsotg,
+ params->host_nperio_tx_fifo_size);
+ dwc2_set_param_host_perio_tx_fifo_size(hsotg,
+ params->host_perio_tx_fifo_size);
+ dwc2_set_param_max_transfer_size(hsotg,
+ params->max_transfer_size);
+ dwc2_set_param_max_packet_count(hsotg,
+ params->max_packet_count);
+ dwc2_set_param_host_channels(hsotg, params->host_channels);
+ dwc2_set_param_phy_type(hsotg, params->phy_type);
+ dwc2_set_param_speed(hsotg, params->speed);
+ dwc2_set_param_host_ls_low_power_phy_clk(hsotg,
+ params->host_ls_low_power_phy_clk);
+ dwc2_set_param_phy_ulpi_ddr(hsotg, params->phy_ulpi_ddr);
+ dwc2_set_param_phy_ulpi_ext_vbus(hsotg,
+ params->phy_ulpi_ext_vbus);
+ dwc2_set_param_phy_utmi_width(hsotg, params->phy_utmi_width);
+ dwc2_set_param_ulpi_fs_ls(hsotg, params->ulpi_fs_ls);
+ dwc2_set_param_ts_dline(hsotg, params->ts_dline);
+ dwc2_set_param_i2c_enable(hsotg, params->i2c_enable);
+ dwc2_set_param_en_multiple_tx_fifo(hsotg,
+ params->en_multiple_tx_fifo);
+ dwc2_set_param_reload_ctl(hsotg, params->reload_ctl);
+ dwc2_set_param_ahbcfg(hsotg, params->ahbcfg);
+ dwc2_set_param_otg_ver(hsotg, params->otg_ver);
+ dwc2_set_param_uframe_sched(hsotg, params->uframe_sched);
+}
+
+/**
+ * During device initialization, read various hardware configuration
+ * registers and interpret the contents.
+ */
+int dwc2_get_hwparams(struct dwc2_hsotg *hsotg)
+{
+ struct dwc2_hw_params *hw = &hsotg->hw_params;
+ unsigned width;
+ u32 hwcfg1, hwcfg2, hwcfg3, hwcfg4;
+ u32 hptxfsiz, grxfsiz, gnptxfsiz;
+ u32 gusbcfg;
+
+ /*
+ * Attempt to ensure this device is really a DWC_otg Controller.
+ * Read and verify the GSNPSID register contents. The value should be
+ * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3",
+ * as in "OTG version 2.xx" or "OTG version 3.xx".
+ */
+ hw->snpsid = readl(hsotg->regs + GSNPSID);
+ if ((hw->snpsid & 0xfffff000) != 0x4f542000 &&
+ (hw->snpsid & 0xfffff000) != 0x4f543000) {
+ dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n",
+ hw->snpsid);
+ return -ENODEV;
+ }
+
+ dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x (snpsid=%x)\n",
+ hw->snpsid >> 12 & 0xf, hw->snpsid >> 8 & 0xf,
+ hw->snpsid >> 4 & 0xf, hw->snpsid & 0xf, hw->snpsid);
+
+ hwcfg1 = readl(hsotg->regs + GHWCFG1);
+ hwcfg2 = readl(hsotg->regs + GHWCFG2);
+ hwcfg3 = readl(hsotg->regs + GHWCFG3);
+ hwcfg4 = readl(hsotg->regs + GHWCFG4);
+ gnptxfsiz = readl(hsotg->regs + GNPTXFSIZ);
+ grxfsiz = readl(hsotg->regs + GRXFSIZ);
+
+ dev_dbg(hsotg->dev, "hwcfg1=%08x\n", hwcfg1);
+ dev_dbg(hsotg->dev, "hwcfg2=%08x\n", hwcfg2);
+ dev_dbg(hsotg->dev, "hwcfg3=%08x\n", hwcfg3);
+ dev_dbg(hsotg->dev, "hwcfg4=%08x\n", hwcfg4);
+ dev_dbg(hsotg->dev, "gnptxfsiz=%08x\n", gnptxfsiz);
+ dev_dbg(hsotg->dev, "grxfsiz=%08x\n", grxfsiz);
+
+ /* Force host mode to get HPTXFSIZ exact power on value */
+ gusbcfg = readl(hsotg->regs + GUSBCFG);
+ gusbcfg |= GUSBCFG_FORCEHOSTMODE;
+ writel(gusbcfg, hsotg->regs + GUSBCFG);
+ usleep_range(100000, 150000);
+
+ hptxfsiz = readl(hsotg->regs + HPTXFSIZ);
+ dev_dbg(hsotg->dev, "hptxfsiz=%08x\n", hptxfsiz);
+ gusbcfg = readl(hsotg->regs + GUSBCFG);
+ gusbcfg &= ~GUSBCFG_FORCEHOSTMODE;
+ writel(gusbcfg, hsotg->regs + GUSBCFG);
+ usleep_range(100000, 150000);
+
+ /* hwcfg2 */
+ hw->op_mode = (hwcfg2 & GHWCFG2_OP_MODE_MASK) >>
+ GHWCFG2_OP_MODE_SHIFT;
+ hw->arch = (hwcfg2 & GHWCFG2_ARCHITECTURE_MASK) >>
+ GHWCFG2_ARCHITECTURE_SHIFT;
+ hw->enable_dynamic_fifo = !!(hwcfg2 & GHWCFG2_DYNAMIC_FIFO);
+ hw->host_channels = 1 + ((hwcfg2 & GHWCFG2_NUM_HOST_CHAN_MASK) >>
+ GHWCFG2_NUM_HOST_CHAN_SHIFT);
+ hw->hs_phy_type = (hwcfg2 & GHWCFG2_HS_PHY_TYPE_MASK) >>
+ GHWCFG2_HS_PHY_TYPE_SHIFT;
+ hw->fs_phy_type = (hwcfg2 & GHWCFG2_FS_PHY_TYPE_MASK) >>
+ GHWCFG2_FS_PHY_TYPE_SHIFT;
+ hw->num_dev_ep = (hwcfg2 & GHWCFG2_NUM_DEV_EP_MASK) >>
+ GHWCFG2_NUM_DEV_EP_SHIFT;
+ hw->nperio_tx_q_depth =
+ (hwcfg2 & GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK) >>
+ GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT << 1;
+ hw->host_perio_tx_q_depth =
+ (hwcfg2 & GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK) >>
+ GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT << 1;
+ hw->dev_token_q_depth =
+ (hwcfg2 & GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK) >>
+ GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT;
+
+ /* hwcfg3 */
+ width = (hwcfg3 & GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK) >>
+ GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT;
+ hw->max_transfer_size = (1 << (width + 11)) - 1;
+ width = (hwcfg3 & GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK) >>
+ GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT;
+ hw->max_packet_count = (1 << (width + 4)) - 1;
+ hw->i2c_enable = !!(hwcfg3 & GHWCFG3_I2C);
+ hw->total_fifo_size = (hwcfg3 & GHWCFG3_DFIFO_DEPTH_MASK) >>
+ GHWCFG3_DFIFO_DEPTH_SHIFT;
+
+ /* hwcfg4 */
+ hw->en_multiple_tx_fifo = !!(hwcfg4 & GHWCFG4_DED_FIFO_EN);
+ hw->num_dev_perio_in_ep = (hwcfg4 & GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK) >>
+ GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT;
+ hw->dma_desc_enable = !!(hwcfg4 & GHWCFG4_DESC_DMA);
+ hw->power_optimized = !!(hwcfg4 & GHWCFG4_POWER_OPTIMIZ);
+ hw->utmi_phy_data_width = (hwcfg4 & GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK) >>
+ GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT;
+
+ /* fifo sizes */
+ hw->host_rx_fifo_size = (grxfsiz & GRXFSIZ_DEPTH_MASK) >>
+ GRXFSIZ_DEPTH_SHIFT;
+ hw->host_nperio_tx_fifo_size = (gnptxfsiz & FIFOSIZE_DEPTH_MASK) >>
+ FIFOSIZE_DEPTH_SHIFT;
+ hw->host_perio_tx_fifo_size = (hptxfsiz & FIFOSIZE_DEPTH_MASK) >>
+ FIFOSIZE_DEPTH_SHIFT;
+
+ dev_dbg(hsotg->dev, "Detected values from hardware:\n");
+ dev_dbg(hsotg->dev, " op_mode=%d\n",
+ hw->op_mode);
+ dev_dbg(hsotg->dev, " arch=%d\n",
+ hw->arch);
+ dev_dbg(hsotg->dev, " dma_desc_enable=%d\n",
+ hw->dma_desc_enable);
+ dev_dbg(hsotg->dev, " power_optimized=%d\n",
+ hw->power_optimized);
+ dev_dbg(hsotg->dev, " i2c_enable=%d\n",
+ hw->i2c_enable);
+ dev_dbg(hsotg->dev, " hs_phy_type=%d\n",
+ hw->hs_phy_type);
+ dev_dbg(hsotg->dev, " fs_phy_type=%d\n",
+ hw->fs_phy_type);
+ dev_dbg(hsotg->dev, " utmi_phy_data_wdith=%d\n",
+ hw->utmi_phy_data_width);
+ dev_dbg(hsotg->dev, " num_dev_ep=%d\n",
+ hw->num_dev_ep);
+ dev_dbg(hsotg->dev, " num_dev_perio_in_ep=%d\n",
+ hw->num_dev_perio_in_ep);
+ dev_dbg(hsotg->dev, " host_channels=%d\n",
+ hw->host_channels);
+ dev_dbg(hsotg->dev, " max_transfer_size=%d\n",
+ hw->max_transfer_size);
+ dev_dbg(hsotg->dev, " max_packet_count=%d\n",
+ hw->max_packet_count);
+ dev_dbg(hsotg->dev, " nperio_tx_q_depth=0x%0x\n",
+ hw->nperio_tx_q_depth);
+ dev_dbg(hsotg->dev, " host_perio_tx_q_depth=0x%0x\n",
+ hw->host_perio_tx_q_depth);
+ dev_dbg(hsotg->dev, " dev_token_q_depth=0x%0x\n",
+ hw->dev_token_q_depth);
+ dev_dbg(hsotg->dev, " enable_dynamic_fifo=%d\n",
+ hw->enable_dynamic_fifo);
+ dev_dbg(hsotg->dev, " en_multiple_tx_fifo=%d\n",
+ hw->en_multiple_tx_fifo);
+ dev_dbg(hsotg->dev, " total_fifo_size=%d\n",
+ hw->total_fifo_size);
+ dev_dbg(hsotg->dev, " host_rx_fifo_size=%d\n",
+ hw->host_rx_fifo_size);
+ dev_dbg(hsotg->dev, " host_nperio_tx_fifo_size=%d\n",
+ hw->host_nperio_tx_fifo_size);
+ dev_dbg(hsotg->dev, " host_perio_tx_fifo_size=%d\n",
+ hw->host_perio_tx_fifo_size);
+ dev_dbg(hsotg->dev, "\n");
+
+ return 0;
+}
+
+u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg)
+{
+ return hsotg->core_params->otg_ver == 1 ? 0x0200 : 0x0103;
+}
+
+bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg)
+{
+ if (readl(hsotg->regs + GSNPSID) == 0xffffffff)
+ return false;
+ else
+ return true;
+}
+
+/**
+ * dwc2_enable_global_interrupts() - Enables the controller's Global
+ * Interrupt in the AHB Config register
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+void dwc2_enable_global_interrupts(struct dwc2_hsotg *hsotg)
+{
+ u32 ahbcfg = readl(hsotg->regs + GAHBCFG);
+
+ ahbcfg |= GAHBCFG_GLBL_INTR_EN;
+ writel(ahbcfg, hsotg->regs + GAHBCFG);
+}
+
+/**
+ * dwc2_disable_global_interrupts() - Disables the controller's Global
+ * Interrupt in the AHB Config register
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+void dwc2_disable_global_interrupts(struct dwc2_hsotg *hsotg)
+{
+ u32 ahbcfg = readl(hsotg->regs + GAHBCFG);
+
+ ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
+ writel(ahbcfg, hsotg->regs + GAHBCFG);
+}
+
+MODULE_DESCRIPTION("DESIGNWARE HS OTG Core");
+MODULE_AUTHOR("Synopsys, Inc.");
+MODULE_LICENSE("Dual BSD/GPL");
--- /dev/null
+/*
+ * core.h - DesignWare HS OTG Controller common declarations
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __DWC2_CORE_H__
+#define __DWC2_CORE_H__
+
+#include <linux/usb/phy.h>
+#include "hw.h"
+
+#ifdef DWC2_LOG_WRITES
+static inline void do_write(u32 value, void *addr)
+{
+ writel(value, addr);
+ pr_info("INFO:: wrote %08x to %p\n", value, addr);
+}
+
+#undef writel
+#define writel(v, a) do_write(v, a)
+#endif
+
+/* Maximum number of Endpoints/HostChannels */
+#define MAX_EPS_CHANNELS 16
+
+struct dwc2_hsotg;
+struct dwc2_host_chan;
+
+/* Device States */
+enum dwc2_lx_state {
+ DWC2_L0, /* On state */
+ DWC2_L1, /* LPM sleep state */
+ DWC2_L2, /* USB suspend state */
+ DWC2_L3, /* Off state */
+};
+
+/**
+ * struct dwc2_core_params - Parameters for configuring the core
+ *
+ * @otg_cap: Specifies the OTG capabilities.
+ * 0 - HNP and SRP capable
+ * 1 - SRP Only capable
+ * 2 - No HNP/SRP capable (always available)
+ * Defaults to best available option (0, 1, then 2)
+ * @otg_ver: OTG version supported
+ * 0 - 1.3 (default)
+ * 1 - 2.0
+ * @dma_enable: Specifies whether to use slave or DMA mode for accessing
+ * the data FIFOs. The driver will automatically detect the
+ * value for this parameter if none is specified.
+ * 0 - Slave (always available)
+ * 1 - DMA (default, if available)
+ * @dma_desc_enable: When DMA mode is enabled, specifies whether to use
+ * address DMA mode or descriptor DMA mode for accessing
+ * the data FIFOs. The driver will automatically detect the
+ * value for this if none is specified.
+ * 0 - Address DMA
+ * 1 - Descriptor DMA (default, if available)
+ * @speed: Specifies the maximum speed of operation in host and
+ * device mode. The actual speed depends on the speed of
+ * the attached device and the value of phy_type.
+ * 0 - High Speed
+ * (default when phy_type is UTMI+ or ULPI)
+ * 1 - Full Speed
+ * (default when phy_type is Full Speed)
+ * @enable_dynamic_fifo: 0 - Use coreConsultant-specified FIFO size parameters
+ * 1 - Allow dynamic FIFO sizing (default, if available)
+ * @en_multiple_tx_fifo: Specifies whether dedicated per-endpoint transmit FIFOs
+ * are enabled
+ * @host_rx_fifo_size: Number of 4-byte words in the Rx FIFO in host mode when
+ * dynamic FIFO sizing is enabled
+ * 16 to 32768
+ * Actual maximum value is autodetected and also
+ * the default.
+ * @host_nperio_tx_fifo_size: Number of 4-byte words in the non-periodic Tx FIFO
+ * in host mode when dynamic FIFO sizing is enabled
+ * 16 to 32768
+ * Actual maximum value is autodetected and also
+ * the default.
+ * @host_perio_tx_fifo_size: Number of 4-byte words in the periodic Tx FIFO in
+ * host mode when dynamic FIFO sizing is enabled
+ * 16 to 32768
+ * Actual maximum value is autodetected and also
+ * the default.
+ * @max_transfer_size: The maximum transfer size supported, in bytes
+ * 2047 to 65,535
+ * Actual maximum value is autodetected and also
+ * the default.
+ * @max_packet_count: The maximum number of packets in a transfer
+ * 15 to 511
+ * Actual maximum value is autodetected and also
+ * the default.
+ * @host_channels: The number of host channel registers to use
+ * 1 to 16
+ * Actual maximum value is autodetected and also
+ * the default.
+ * @phy_type: Specifies the type of PHY interface to use. By default,
+ * the driver will automatically detect the phy_type.
+ * 0 - Full Speed Phy
+ * 1 - UTMI+ Phy
+ * 2 - ULPI Phy
+ * Defaults to best available option (2, 1, then 0)
+ * @phy_utmi_width: Specifies the UTMI+ Data Width (in bits). This parameter
+ * is applicable for a phy_type of UTMI+ or ULPI. (For a
+ * ULPI phy_type, this parameter indicates the data width
+ * between the MAC and the ULPI Wrapper.) Also, this
+ * parameter is applicable only if the OTG_HSPHY_WIDTH cC
+ * parameter was set to "8 and 16 bits", meaning that the
+ * core has been configured to work at either data path
+ * width.
+ * 8 or 16 (default 16 if available)
+ * @phy_ulpi_ddr: Specifies whether the ULPI operates at double or single
+ * data rate. This parameter is only applicable if phy_type
+ * is ULPI.
+ * 0 - single data rate ULPI interface with 8 bit wide
+ * data bus (default)
+ * 1 - double data rate ULPI interface with 4 bit wide
+ * data bus
+ * @phy_ulpi_ext_vbus: For a ULPI phy, specifies whether to use the internal or
+ * external supply to drive the VBus
+ * 0 - Internal supply (default)
+ * 1 - External supply
+ * @i2c_enable: Specifies whether to use the I2Cinterface for a full
+ * speed PHY. This parameter is only applicable if phy_type
+ * is FS.
+ * 0 - No (default)
+ * 1 - Yes
+ * @ulpi_fs_ls: Make ULPI phy operate in FS/LS mode only
+ * 0 - No (default)
+ * 1 - Yes
+ * @host_support_fs_ls_low_power: Specifies whether low power mode is supported
+ * when attached to a Full Speed or Low Speed device in
+ * host mode.
+ * 0 - Don't support low power mode (default)
+ * 1 - Support low power mode
+ * @host_ls_low_power_phy_clk: Specifies the PHY clock rate in low power mode
+ * when connected to a Low Speed device in host
+ * mode. This parameter is applicable only if
+ * host_support_fs_ls_low_power is enabled.
+ * 0 - 48 MHz
+ * (default when phy_type is UTMI+ or ULPI)
+ * 1 - 6 MHz
+ * (default when phy_type is Full Speed)
+ * @ts_dline: Enable Term Select Dline pulsing
+ * 0 - No (default)
+ * 1 - Yes
+ * @reload_ctl: Allow dynamic reloading of HFIR register during runtime
+ * 0 - No (default for core < 2.92a)
+ * 1 - Yes (default for core >= 2.92a)
+ * @ahbcfg: This field allows the default value of the GAHBCFG
+ * register to be overridden
+ * -1 - GAHBCFG value will be set to 0x06
+ * (INCR4, default)
+ * all others - GAHBCFG value will be overridden with
+ * this value
+ * Not all bits can be controlled like this, the
+ * bits defined by GAHBCFG_CTRL_MASK are controlled
+ * by the driver and are ignored in this
+ * configuration value.
+ * @uframe_sched: True to enable the microframe scheduler
+ *
+ * The following parameters may be specified when starting the module. These
+ * parameters define how the DWC_otg controller should be configured. A
+ * value of -1 (or any other out of range value) for any parameter means
+ * to read the value from hardware (if possible) or use the builtin
+ * default described above.
+ */
+struct dwc2_core_params {
+ /*
+ * Don't add any non-int members here, this will break
+ * dwc2_set_all_params!
+ */
+ int otg_cap;
+ int otg_ver;
+ int dma_enable;
+ int dma_desc_enable;
+ int speed;
+ int enable_dynamic_fifo;
+ int en_multiple_tx_fifo;
+ int host_rx_fifo_size;
+ int host_nperio_tx_fifo_size;
+ int host_perio_tx_fifo_size;
+ int max_transfer_size;
+ int max_packet_count;
+ int host_channels;
+ int phy_type;
+ int phy_utmi_width;
+ int phy_ulpi_ddr;
+ int phy_ulpi_ext_vbus;
+ int i2c_enable;
+ int ulpi_fs_ls;
+ int host_support_fs_ls_low_power;
+ int host_ls_low_power_phy_clk;
+ int ts_dline;
+ int reload_ctl;
+ int ahbcfg;
+ int uframe_sched;
+};
+
+/**
+ * struct dwc2_hw_params - Autodetected parameters.
+ *
+ * These parameters are the various parameters read from hardware
+ * registers during initialization. They typically contain the best
+ * supported or maximum value that can be configured in the
+ * corresponding dwc2_core_params value.
+ *
+ * The values that are not in dwc2_core_params are documented below.
+ *
+ * @op_mode Mode of Operation
+ * 0 - HNP- and SRP-Capable OTG (Host & Device)
+ * 1 - SRP-Capable OTG (Host & Device)
+ * 2 - Non-HNP and Non-SRP Capable OTG (Host & Device)
+ * 3 - SRP-Capable Device
+ * 4 - Non-OTG Device
+ * 5 - SRP-Capable Host
+ * 6 - Non-OTG Host
+ * @arch Architecture
+ * 0 - Slave only
+ * 1 - External DMA
+ * 2 - Internal DMA
+ * @power_optimized Are power optimizations enabled?
+ * @num_dev_ep Number of device endpoints available
+ * @num_dev_perio_in_ep Number of device periodic IN endpoints
+ * avaialable
+ * @dev_token_q_depth Device Mode IN Token Sequence Learning Queue
+ * Depth
+ * 0 to 30
+ * @host_perio_tx_q_depth
+ * Host Mode Periodic Request Queue Depth
+ * 2, 4 or 8
+ * @nperio_tx_q_depth
+ * Non-Periodic Request Queue Depth
+ * 2, 4 or 8
+ * @hs_phy_type High-speed PHY interface type
+ * 0 - High-speed interface not supported
+ * 1 - UTMI+
+ * 2 - ULPI
+ * 3 - UTMI+ and ULPI
+ * @fs_phy_type Full-speed PHY interface type
+ * 0 - Full speed interface not supported
+ * 1 - Dedicated full speed interface
+ * 2 - FS pins shared with UTMI+ pins
+ * 3 - FS pins shared with ULPI pins
+ * @total_fifo_size: Total internal RAM for FIFOs (bytes)
+ * @utmi_phy_data_width UTMI+ PHY data width
+ * 0 - 8 bits
+ * 1 - 16 bits
+ * 2 - 8 or 16 bits
+ * @snpsid: Value from SNPSID register
+ */
+struct dwc2_hw_params {
+ unsigned op_mode:3;
+ unsigned arch:2;
+ unsigned dma_desc_enable:1;
+ unsigned enable_dynamic_fifo:1;
+ unsigned en_multiple_tx_fifo:1;
+ unsigned host_rx_fifo_size:16;
+ unsigned host_nperio_tx_fifo_size:16;
+ unsigned host_perio_tx_fifo_size:16;
+ unsigned nperio_tx_q_depth:3;
+ unsigned host_perio_tx_q_depth:3;
+ unsigned dev_token_q_depth:5;
+ unsigned max_transfer_size:26;
+ unsigned max_packet_count:11;
+ unsigned host_channels:5;
+ unsigned hs_phy_type:2;
+ unsigned fs_phy_type:2;
+ unsigned i2c_enable:1;
+ unsigned num_dev_ep:4;
+ unsigned num_dev_perio_in_ep:4;
+ unsigned total_fifo_size:16;
+ unsigned power_optimized:1;
+ unsigned utmi_phy_data_width:2;
+ u32 snpsid;
+};
+
+/**
+ * struct dwc2_hsotg - Holds the state of the driver, including the non-periodic
+ * and periodic schedules
+ *
+ * @dev: The struct device pointer
+ * @regs: Pointer to controller regs
+ * @core_params: Parameters that define how the core should be configured
+ * @hw_params: Parameters that were autodetected from the
+ * hardware registers
+ * @op_state: The operational State, during transitions (a_host=>
+ * a_peripheral and b_device=>b_host) this may not match
+ * the core, but allows the software to determine
+ * transitions
+ * @queuing_high_bandwidth: True if multiple packets of a high-bandwidth
+ * transfer are in process of being queued
+ * @srp_success: Stores status of SRP request in the case of a FS PHY
+ * with an I2C interface
+ * @wq_otg: Workqueue object used for handling of some interrupts
+ * @wf_otg: Work object for handling Connector ID Status Change
+ * interrupt
+ * @wkp_timer: Timer object for handling Wakeup Detected interrupt
+ * @lx_state: Lx state of connected device
+ * @flags: Flags for handling root port state changes
+ * @non_periodic_sched_inactive: Inactive QHs in the non-periodic schedule.
+ * Transfers associated with these QHs are not currently
+ * assigned to a host channel.
+ * @non_periodic_sched_active: Active QHs in the non-periodic schedule.
+ * Transfers associated with these QHs are currently
+ * assigned to a host channel.
+ * @non_periodic_qh_ptr: Pointer to next QH to process in the active
+ * non-periodic schedule
+ * @periodic_sched_inactive: Inactive QHs in the periodic schedule. This is a
+ * list of QHs for periodic transfers that are _not_
+ * scheduled for the next frame. Each QH in the list has an
+ * interval counter that determines when it needs to be
+ * scheduled for execution. This scheduling mechanism
+ * allows only a simple calculation for periodic bandwidth
+ * used (i.e. must assume that all periodic transfers may
+ * need to execute in the same frame). However, it greatly
+ * simplifies scheduling and should be sufficient for the
+ * vast majority of OTG hosts, which need to connect to a
+ * small number of peripherals at one time. Items move from
+ * this list to periodic_sched_ready when the QH interval
+ * counter is 0 at SOF.
+ * @periodic_sched_ready: List of periodic QHs that are ready for execution in
+ * the next frame, but have not yet been assigned to host
+ * channels. Items move from this list to
+ * periodic_sched_assigned as host channels become
+ * available during the current frame.
+ * @periodic_sched_assigned: List of periodic QHs to be executed in the next
+ * frame that are assigned to host channels. Items move
+ * from this list to periodic_sched_queued as the
+ * transactions for the QH are queued to the DWC_otg
+ * controller.
+ * @periodic_sched_queued: List of periodic QHs that have been queued for
+ * execution. Items move from this list to either
+ * periodic_sched_inactive or periodic_sched_ready when the
+ * channel associated with the transfer is released. If the
+ * interval for the QH is 1, the item moves to
+ * periodic_sched_ready because it must be rescheduled for
+ * the next frame. Otherwise, the item moves to
+ * periodic_sched_inactive.
+ * @periodic_usecs: Total bandwidth claimed so far for periodic transfers.
+ * This value is in microseconds per (micro)frame. The
+ * assumption is that all periodic transfers may occur in
+ * the same (micro)frame.
+ * @frame_usecs: Internal variable used by the microframe scheduler
+ * @frame_number: Frame number read from the core at SOF. The value ranges
+ * from 0 to HFNUM_MAX_FRNUM.
+ * @periodic_qh_count: Count of periodic QHs, if using several eps. Used for
+ * SOF enable/disable.
+ * @free_hc_list: Free host channels in the controller. This is a list of
+ * struct dwc2_host_chan items.
+ * @periodic_channels: Number of host channels assigned to periodic transfers.
+ * Currently assuming that there is a dedicated host
+ * channel for each periodic transaction and at least one
+ * host channel is available for non-periodic transactions.
+ * @non_periodic_channels: Number of host channels assigned to non-periodic
+ * transfers
+ * @available_host_channels Number of host channels available for the microframe
+ * scheduler to use
+ * @hc_ptr_array: Array of pointers to the host channel descriptors.
+ * Allows accessing a host channel descriptor given the
+ * host channel number. This is useful in interrupt
+ * handlers.
+ * @status_buf: Buffer used for data received during the status phase of
+ * a control transfer.
+ * @status_buf_dma: DMA address for status_buf
+ * @start_work: Delayed work for handling host A-cable connection
+ * @reset_work: Delayed work for handling a port reset
+ * @lock: Spinlock that protects all the driver data structures
+ * @priv: Stores a pointer to the struct usb_hcd
+ * @otg_port: OTG port number
+ * @frame_list: Frame list
+ * @frame_list_dma: Frame list DMA address
+ */
+struct dwc2_hsotg {
+ struct device *dev;
+ void __iomem *regs;
+ /** Params detected from hardware */
+ struct dwc2_hw_params hw_params;
+ /** Params to actually use */
+ struct dwc2_core_params *core_params;
+ enum usb_otg_state op_state;
+
+ unsigned int queuing_high_bandwidth:1;
+ unsigned int srp_success:1;
+
+ struct workqueue_struct *wq_otg;
+ struct work_struct wf_otg;
+ struct timer_list wkp_timer;
+ enum dwc2_lx_state lx_state;
+
+ union dwc2_hcd_internal_flags {
+ u32 d32;
+ struct {
+ unsigned port_connect_status_change:1;
+ unsigned port_connect_status:1;
+ unsigned port_reset_change:1;
+ unsigned port_enable_change:1;
+ unsigned port_suspend_change:1;
+ unsigned port_over_current_change:1;
+ unsigned port_l1_change:1;
+ unsigned reserved:26;
+ } b;
+ } flags;
+
+ struct list_head non_periodic_sched_inactive;
+ struct list_head non_periodic_sched_active;
+ struct list_head *non_periodic_qh_ptr;
+ struct list_head periodic_sched_inactive;
+ struct list_head periodic_sched_ready;
+ struct list_head periodic_sched_assigned;
+ struct list_head periodic_sched_queued;
+ u16 periodic_usecs;
+ u16 frame_usecs[8];
+ u16 frame_number;
+ u16 periodic_qh_count;
+
+#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
+#define FRAME_NUM_ARRAY_SIZE 1000
+ u16 last_frame_num;
+ u16 *frame_num_array;
+ u16 *last_frame_num_array;
+ int frame_num_idx;
+ int dumped_frame_num_array;
+#endif
+
+ struct list_head free_hc_list;
+ int periodic_channels;
+ int non_periodic_channels;
+ int available_host_channels;
+ struct dwc2_host_chan *hc_ptr_array[MAX_EPS_CHANNELS];
+ u8 *status_buf;
+ dma_addr_t status_buf_dma;
+#define DWC2_HCD_STATUS_BUF_SIZE 64
+
+ struct delayed_work start_work;
+ struct delayed_work reset_work;
+ spinlock_t lock;
+ void *priv;
+ u8 otg_port;
+ u32 *frame_list;
+ dma_addr_t frame_list_dma;
+
+ /* DWC OTG HW Release versions */
+#define DWC2_CORE_REV_2_71a 0x4f54271a
+#define DWC2_CORE_REV_2_90a 0x4f54290a
+#define DWC2_CORE_REV_2_92a 0x4f54292a
+#define DWC2_CORE_REV_2_94a 0x4f54294a
+#define DWC2_CORE_REV_3_00a 0x4f54300a
+
+#ifdef DEBUG
+ u32 frrem_samples;
+ u64 frrem_accum;
+
+ u32 hfnum_7_samples_a;
+ u64 hfnum_7_frrem_accum_a;
+ u32 hfnum_0_samples_a;
+ u64 hfnum_0_frrem_accum_a;
+ u32 hfnum_other_samples_a;
+ u64 hfnum_other_frrem_accum_a;
+
+ u32 hfnum_7_samples_b;
+ u64 hfnum_7_frrem_accum_b;
+ u32 hfnum_0_samples_b;
+ u64 hfnum_0_frrem_accum_b;
+ u32 hfnum_other_samples_b;
+ u64 hfnum_other_frrem_accum_b;
+#endif
+};
+
+/* Reasons for halting a host channel */
+enum dwc2_halt_status {
+ DWC2_HC_XFER_NO_HALT_STATUS,
+ DWC2_HC_XFER_COMPLETE,
+ DWC2_HC_XFER_URB_COMPLETE,
+ DWC2_HC_XFER_ACK,
+ DWC2_HC_XFER_NAK,
+ DWC2_HC_XFER_NYET,
+ DWC2_HC_XFER_STALL,
+ DWC2_HC_XFER_XACT_ERR,
+ DWC2_HC_XFER_FRAME_OVERRUN,
+ DWC2_HC_XFER_BABBLE_ERR,
+ DWC2_HC_XFER_DATA_TOGGLE_ERR,
+ DWC2_HC_XFER_AHB_ERR,
+ DWC2_HC_XFER_PERIODIC_INCOMPLETE,
+ DWC2_HC_XFER_URB_DEQUEUE,
+};
+
+/*
+ * The following functions support initialization of the core driver component
+ * and the DWC_otg controller
+ */
+extern void dwc2_core_host_init(struct dwc2_hsotg *hsotg);
+
+/*
+ * Host core Functions.
+ * The following functions support managing the DWC_otg controller in host
+ * mode.
+ */
+extern void dwc2_hc_init(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan);
+extern void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
+ enum dwc2_halt_status halt_status);
+extern void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan);
+extern void dwc2_hc_start_transfer(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan);
+extern void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan);
+extern int dwc2_hc_continue_transfer(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan);
+extern void dwc2_hc_do_ping(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan);
+extern void dwc2_enable_host_interrupts(struct dwc2_hsotg *hsotg);
+extern void dwc2_disable_host_interrupts(struct dwc2_hsotg *hsotg);
+
+extern u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg);
+extern bool dwc2_is_controller_alive(struct dwc2_hsotg *hsotg);
+
+/*
+ * Common core Functions.
+ * The following functions support managing the DWC_otg controller in either
+ * device or host mode.
+ */
+extern void dwc2_read_packet(struct dwc2_hsotg *hsotg, u8 *dest, u16 bytes);
+extern void dwc2_flush_tx_fifo(struct dwc2_hsotg *hsotg, const int num);
+extern void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg);
+
+extern int dwc2_core_init(struct dwc2_hsotg *hsotg, bool select_phy, int irq);
+extern void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd);
+extern void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd);
+
+/* This function should be called on every hardware interrupt. */
+extern irqreturn_t dwc2_handle_common_intr(int irq, void *dev);
+
+/* OTG Core Parameters */
+
+/*
+ * Specifies the OTG capabilities. The driver will automatically
+ * detect the value for this parameter if none is specified.
+ * 0 - HNP and SRP capable (default)
+ * 1 - SRP Only capable
+ * 2 - No HNP/SRP capable
+ */
+extern void dwc2_set_param_otg_cap(struct dwc2_hsotg *hsotg, int val);
+#define DWC2_CAP_PARAM_HNP_SRP_CAPABLE 0
+#define DWC2_CAP_PARAM_SRP_ONLY_CAPABLE 1
+#define DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE 2
+
+/*
+ * Specifies whether to use slave or DMA mode for accessing the data
+ * FIFOs. The driver will automatically detect the value for this
+ * parameter if none is specified.
+ * 0 - Slave
+ * 1 - DMA (default, if available)
+ */
+extern void dwc2_set_param_dma_enable(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * When DMA mode is enabled specifies whether to use
+ * address DMA or DMA Descritor mode for accessing the data
+ * FIFOs in device mode. The driver will automatically detect
+ * the value for this parameter if none is specified.
+ * 0 - address DMA
+ * 1 - DMA Descriptor(default, if available)
+ */
+extern void dwc2_set_param_dma_desc_enable(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Specifies the maximum speed of operation in host and device mode.
+ * The actual speed depends on the speed of the attached device and
+ * the value of phy_type. The actual speed depends on the speed of the
+ * attached device.
+ * 0 - High Speed (default)
+ * 1 - Full Speed
+ */
+extern void dwc2_set_param_speed(struct dwc2_hsotg *hsotg, int val);
+#define DWC2_SPEED_PARAM_HIGH 0
+#define DWC2_SPEED_PARAM_FULL 1
+
+/*
+ * Specifies whether low power mode is supported when attached
+ * to a Full Speed or Low Speed device in host mode.
+ *
+ * 0 - Don't support low power mode (default)
+ * 1 - Support low power mode
+ */
+extern void dwc2_set_param_host_support_fs_ls_low_power(
+ struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Specifies the PHY clock rate in low power mode when connected to a
+ * Low Speed device in host mode. This parameter is applicable only if
+ * HOST_SUPPORT_FS_LS_LOW_POWER is enabled. If PHY_TYPE is set to FS
+ * then defaults to 6 MHZ otherwise 48 MHZ.
+ *
+ * 0 - 48 MHz
+ * 1 - 6 MHz
+ */
+extern void dwc2_set_param_host_ls_low_power_phy_clk(struct dwc2_hsotg *hsotg,
+ int val);
+#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_48MHZ 0
+#define DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ 1
+
+/*
+ * 0 - Use cC FIFO size parameters
+ * 1 - Allow dynamic FIFO sizing (default)
+ */
+extern void dwc2_set_param_enable_dynamic_fifo(struct dwc2_hsotg *hsotg,
+ int val);
+
+/*
+ * Number of 4-byte words in the Rx FIFO in host mode when dynamic
+ * FIFO sizing is enabled.
+ * 16 to 32768 (default 1024)
+ */
+extern void dwc2_set_param_host_rx_fifo_size(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Number of 4-byte words in the non-periodic Tx FIFO in host mode
+ * when Dynamic FIFO sizing is enabled in the core.
+ * 16 to 32768 (default 256)
+ */
+extern void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg,
+ int val);
+
+/*
+ * Number of 4-byte words in the host periodic Tx FIFO when dynamic
+ * FIFO sizing is enabled.
+ * 16 to 32768 (default 256)
+ */
+extern void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg,
+ int val);
+
+/*
+ * The maximum transfer size supported in bytes.
+ * 2047 to 65,535 (default 65,535)
+ */
+extern void dwc2_set_param_max_transfer_size(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * The maximum number of packets in a transfer.
+ * 15 to 511 (default 511)
+ */
+extern void dwc2_set_param_max_packet_count(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * The number of host channel registers to use.
+ * 1 to 16 (default 11)
+ * Note: The FPGA configuration supports a maximum of 11 host channels.
+ */
+extern void dwc2_set_param_host_channels(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Specifies the type of PHY interface to use. By default, the driver
+ * will automatically detect the phy_type.
+ *
+ * 0 - Full Speed PHY
+ * 1 - UTMI+ (default)
+ * 2 - ULPI
+ */
+extern void dwc2_set_param_phy_type(struct dwc2_hsotg *hsotg, int val);
+#define DWC2_PHY_TYPE_PARAM_FS 0
+#define DWC2_PHY_TYPE_PARAM_UTMI 1
+#define DWC2_PHY_TYPE_PARAM_ULPI 2
+
+/*
+ * Specifies the UTMI+ Data Width. This parameter is
+ * applicable for a PHY_TYPE of UTMI+ or ULPI. (For a ULPI
+ * PHY_TYPE, this parameter indicates the data width between
+ * the MAC and the ULPI Wrapper.) Also, this parameter is
+ * applicable only if the OTG_HSPHY_WIDTH cC parameter was set
+ * to "8 and 16 bits", meaning that the core has been
+ * configured to work at either data path width.
+ *
+ * 8 or 16 bits (default 16)
+ */
+extern void dwc2_set_param_phy_utmi_width(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Specifies whether the ULPI operates at double or single
+ * data rate. This parameter is only applicable if PHY_TYPE is
+ * ULPI.
+ *
+ * 0 - single data rate ULPI interface with 8 bit wide data
+ * bus (default)
+ * 1 - double data rate ULPI interface with 4 bit wide data
+ * bus
+ */
+extern void dwc2_set_param_phy_ulpi_ddr(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Specifies whether to use the internal or external supply to
+ * drive the vbus with a ULPI phy.
+ */
+extern void dwc2_set_param_phy_ulpi_ext_vbus(struct dwc2_hsotg *hsotg, int val);
+#define DWC2_PHY_ULPI_INTERNAL_VBUS 0
+#define DWC2_PHY_ULPI_EXTERNAL_VBUS 1
+
+/*
+ * Specifies whether to use the I2Cinterface for full speed PHY. This
+ * parameter is only applicable if PHY_TYPE is FS.
+ * 0 - No (default)
+ * 1 - Yes
+ */
+extern void dwc2_set_param_i2c_enable(struct dwc2_hsotg *hsotg, int val);
+
+extern void dwc2_set_param_ulpi_fs_ls(struct dwc2_hsotg *hsotg, int val);
+
+extern void dwc2_set_param_ts_dline(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Specifies whether dedicated transmit FIFOs are
+ * enabled for non periodic IN endpoints in device mode
+ * 0 - No
+ * 1 - Yes
+ */
+extern void dwc2_set_param_en_multiple_tx_fifo(struct dwc2_hsotg *hsotg,
+ int val);
+
+extern void dwc2_set_param_reload_ctl(struct dwc2_hsotg *hsotg, int val);
+
+extern void dwc2_set_param_ahbcfg(struct dwc2_hsotg *hsotg, int val);
+
+extern void dwc2_set_param_otg_ver(struct dwc2_hsotg *hsotg, int val);
+
+/*
+ * Dump core registers and SPRAM
+ */
+extern void dwc2_dump_dev_registers(struct dwc2_hsotg *hsotg);
+extern void dwc2_dump_host_registers(struct dwc2_hsotg *hsotg);
+extern void dwc2_dump_global_registers(struct dwc2_hsotg *hsotg);
+
+/*
+ * Return OTG version - either 1.3 or 2.0
+ */
+extern u16 dwc2_get_otg_version(struct dwc2_hsotg *hsotg);
+
+#endif /* __DWC2_CORE_H__ */
--- /dev/null
+/*
+ * core_intr.c - DesignWare HS OTG Controller common interrupt handling
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file contains the common interrupt handlers
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <linux/usb/hcd.h>
+#include <linux/usb/ch11.h>
+
+#include "core.h"
+#include "hcd.h"
+
+static const char *dwc2_op_state_str(struct dwc2_hsotg *hsotg)
+{
+ switch (hsotg->op_state) {
+ case OTG_STATE_A_HOST:
+ return "a_host";
+ case OTG_STATE_A_SUSPEND:
+ return "a_suspend";
+ case OTG_STATE_A_PERIPHERAL:
+ return "a_peripheral";
+ case OTG_STATE_B_PERIPHERAL:
+ return "b_peripheral";
+ case OTG_STATE_B_HOST:
+ return "b_host";
+ default:
+ return "unknown";
+ }
+}
+
+/**
+ * dwc2_handle_mode_mismatch_intr() - Logs a mode mismatch warning message
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+static void dwc2_handle_mode_mismatch_intr(struct dwc2_hsotg *hsotg)
+{
+ dev_warn(hsotg->dev, "Mode Mismatch Interrupt: currently in %s mode\n",
+ dwc2_is_host_mode(hsotg) ? "Host" : "Device");
+
+ /* Clear interrupt */
+ writel(GINTSTS_MODEMIS, hsotg->regs + GINTSTS);
+}
+
+/**
+ * dwc2_handle_otg_intr() - Handles the OTG Interrupts. It reads the OTG
+ * Interrupt Register (GOTGINT) to determine what interrupt has occurred.
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ */
+static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 gotgint;
+ u32 gotgctl;
+ u32 gintmsk;
+
+ gotgint = readl(hsotg->regs + GOTGINT);
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ dev_dbg(hsotg->dev, "++OTG Interrupt gotgint=%0x [%s]\n", gotgint,
+ dwc2_op_state_str(hsotg));
+
+ if (gotgint & GOTGINT_SES_END_DET) {
+ dev_dbg(hsotg->dev,
+ " ++OTG Interrupt: Session End Detected++ (%s)\n",
+ dwc2_op_state_str(hsotg));
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+
+ if (hsotg->op_state == OTG_STATE_B_HOST) {
+ hsotg->op_state = OTG_STATE_B_PERIPHERAL;
+ } else {
+ /*
+ * If not B_HOST and Device HNP still set, HNP did
+ * not succeed!
+ */
+ if (gotgctl & GOTGCTL_DEVHNPEN) {
+ dev_dbg(hsotg->dev, "Session End Detected\n");
+ dev_err(hsotg->dev,
+ "Device Not Connected/Responding!\n");
+ }
+
+ /*
+ * If Session End Detected the B-Cable has been
+ * disconnected
+ */
+ /* Reset to a clean state */
+ hsotg->lx_state = DWC2_L0;
+ }
+
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ gotgctl &= ~GOTGCTL_DEVHNPEN;
+ writel(gotgctl, hsotg->regs + GOTGCTL);
+ }
+
+ if (gotgint & GOTGINT_SES_REQ_SUC_STS_CHNG) {
+ dev_dbg(hsotg->dev,
+ " ++OTG Interrupt: Session Request Success Status Change++\n");
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ if (gotgctl & GOTGCTL_SESREQSCS) {
+ if (hsotg->core_params->phy_type ==
+ DWC2_PHY_TYPE_PARAM_FS
+ && hsotg->core_params->i2c_enable > 0) {
+ hsotg->srp_success = 1;
+ } else {
+ /* Clear Session Request */
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ gotgctl &= ~GOTGCTL_SESREQ;
+ writel(gotgctl, hsotg->regs + GOTGCTL);
+ }
+ }
+ }
+
+ if (gotgint & GOTGINT_HST_NEG_SUC_STS_CHNG) {
+ /*
+ * Print statements during the HNP interrupt handling
+ * can cause it to fail
+ */
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ /*
+ * WA for 3.00a- HW is not setting cur_mode, even sometimes
+ * this does not help
+ */
+ if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a)
+ udelay(100);
+ if (gotgctl & GOTGCTL_HSTNEGSCS) {
+ if (dwc2_is_host_mode(hsotg)) {
+ hsotg->op_state = OTG_STATE_B_HOST;
+ /*
+ * Need to disable SOF interrupt immediately.
+ * When switching from device to host, the PCD
+ * interrupt handler won't handle the interrupt
+ * if host mode is already set. The HCD
+ * interrupt handler won't get called if the
+ * HCD state is HALT. This means that the
+ * interrupt does not get handled and Linux
+ * complains loudly.
+ */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk &= ~GINTSTS_SOF;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+
+ /*
+ * Call callback function with spin lock
+ * released
+ */
+ spin_unlock(&hsotg->lock);
+
+ /* Initialize the Core for Host mode */
+ dwc2_hcd_start(hsotg);
+ spin_lock(&hsotg->lock);
+ hsotg->op_state = OTG_STATE_B_HOST;
+ }
+ } else {
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ gotgctl &= ~(GOTGCTL_HNPREQ | GOTGCTL_DEVHNPEN);
+ writel(gotgctl, hsotg->regs + GOTGCTL);
+ dev_dbg(hsotg->dev, "HNP Failed\n");
+ dev_err(hsotg->dev,
+ "Device Not Connected/Responding\n");
+ }
+ }
+
+ if (gotgint & GOTGINT_HST_NEG_DET) {
+ /*
+ * The disconnect interrupt is set at the same time as
+ * Host Negotiation Detected. During the mode switch all
+ * interrupts are cleared so the disconnect interrupt
+ * handler will not get executed.
+ */
+ dev_dbg(hsotg->dev,
+ " ++OTG Interrupt: Host Negotiation Detected++ (%s)\n",
+ (dwc2_is_host_mode(hsotg) ? "Host" : "Device"));
+ if (dwc2_is_device_mode(hsotg)) {
+ dev_dbg(hsotg->dev, "a_suspend->a_peripheral (%d)\n",
+ hsotg->op_state);
+ spin_unlock(&hsotg->lock);
+ dwc2_hcd_disconnect(hsotg);
+ spin_lock(&hsotg->lock);
+ hsotg->op_state = OTG_STATE_A_PERIPHERAL;
+ } else {
+ /* Need to disable SOF interrupt immediately */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk &= ~GINTSTS_SOF;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ spin_unlock(&hsotg->lock);
+ dwc2_hcd_start(hsotg);
+ spin_lock(&hsotg->lock);
+ hsotg->op_state = OTG_STATE_A_HOST;
+ }
+ }
+
+ if (gotgint & GOTGINT_A_DEV_TOUT_CHG)
+ dev_dbg(hsotg->dev,
+ " ++OTG Interrupt: A-Device Timeout Change++\n");
+ if (gotgint & GOTGINT_DBNCE_DONE)
+ dev_dbg(hsotg->dev, " ++OTG Interrupt: Debounce Done++\n");
+
+ /* Clear GOTGINT */
+ writel(gotgint, hsotg->regs + GOTGINT);
+}
+
+/**
+ * dwc2_handle_conn_id_status_change_intr() - Handles the Connector ID Status
+ * Change Interrupt
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ *
+ * Reads the OTG Interrupt Register (GOTCTL) to determine whether this is a
+ * Device to Host Mode transition or a Host to Device Mode transition. This only
+ * occurs when the cable is connected/removed from the PHY connector.
+ */
+static void dwc2_handle_conn_id_status_change_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 gintmsk = readl(hsotg->regs + GINTMSK);
+
+ /* Need to disable SOF interrupt immediately */
+ gintmsk &= ~GINTSTS_SOF;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+
+ dev_dbg(hsotg->dev, " ++Connector ID Status Change Interrupt++ (%s)\n",
+ dwc2_is_host_mode(hsotg) ? "Host" : "Device");
+
+ /*
+ * Need to schedule a work, as there are possible DELAY function calls.
+ * Release lock before scheduling workq as it holds spinlock during
+ * scheduling.
+ */
+ spin_unlock(&hsotg->lock);
+ queue_work(hsotg->wq_otg, &hsotg->wf_otg);
+ spin_lock(&hsotg->lock);
+
+ /* Clear interrupt */
+ writel(GINTSTS_CONIDSTSCHNG, hsotg->regs + GINTSTS);
+}
+
+/**
+ * dwc2_handle_session_req_intr() - This interrupt indicates that a device is
+ * initiating the Session Request Protocol to request the host to turn on bus
+ * power so a new session can begin
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ *
+ * This handler responds by turning on bus power. If the DWC_otg controller is
+ * in low power mode, this handler brings the controller out of low power mode
+ * before turning on bus power.
+ */
+static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
+{
+ dev_dbg(hsotg->dev, "++Session Request Interrupt++\n");
+
+ /* Clear interrupt */
+ writel(GINTSTS_SESSREQINT, hsotg->regs + GINTSTS);
+}
+
+/*
+ * This interrupt indicates that the DWC_otg controller has detected a
+ * resume or remote wakeup sequence. If the DWC_otg controller is in
+ * low power mode, the handler must brings the controller out of low
+ * power mode. The controller automatically begins resume signaling.
+ * The handler schedules a time to stop resume signaling.
+ */
+static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
+{
+ dev_dbg(hsotg->dev, "++Resume or Remote Wakeup Detected Interrupt++\n");
+ dev_dbg(hsotg->dev, "%s lxstate = %d\n", __func__, hsotg->lx_state);
+
+ if (dwc2_is_device_mode(hsotg)) {
+ dev_dbg(hsotg->dev, "DSTS=0x%0x\n", readl(hsotg->regs + DSTS));
+ if (hsotg->lx_state == DWC2_L2) {
+ u32 dctl = readl(hsotg->regs + DCTL);
+
+ /* Clear Remote Wakeup Signaling */
+ dctl &= ~DCTL_RMTWKUPSIG;
+ writel(dctl, hsotg->regs + DCTL);
+ }
+ /* Change to L0 state */
+ hsotg->lx_state = DWC2_L0;
+ } else {
+ if (hsotg->lx_state != DWC2_L1) {
+ u32 pcgcctl = readl(hsotg->regs + PCGCTL);
+
+ /* Restart the Phy Clock */
+ pcgcctl &= ~PCGCTL_STOPPCLK;
+ writel(pcgcctl, hsotg->regs + PCGCTL);
+ mod_timer(&hsotg->wkp_timer,
+ jiffies + msecs_to_jiffies(71));
+ } else {
+ /* Change to L0 state */
+ hsotg->lx_state = DWC2_L0;
+ }
+ }
+
+ /* Clear interrupt */
+ writel(GINTSTS_WKUPINT, hsotg->regs + GINTSTS);
+}
+
+/*
+ * This interrupt indicates that a device has been disconnected from the
+ * root port
+ */
+static void dwc2_handle_disconnect_intr(struct dwc2_hsotg *hsotg)
+{
+ dev_dbg(hsotg->dev, "++Disconnect Detected Interrupt++ (%s) %s\n",
+ dwc2_is_host_mode(hsotg) ? "Host" : "Device",
+ dwc2_op_state_str(hsotg));
+
+ /* Change to L3 (OFF) state */
+ hsotg->lx_state = DWC2_L3;
+
+ writel(GINTSTS_DISCONNINT, hsotg->regs + GINTSTS);
+}
+
+/*
+ * This interrupt indicates that SUSPEND state has been detected on the USB.
+ *
+ * For HNP the USB Suspend interrupt signals the change from "a_peripheral"
+ * to "a_host".
+ *
+ * When power management is enabled the core will be put in low power mode.
+ */
+static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 dsts;
+
+ dev_dbg(hsotg->dev, "USB SUSPEND\n");
+
+ if (dwc2_is_device_mode(hsotg)) {
+ /*
+ * Check the Device status register to determine if the Suspend
+ * state is active
+ */
+ dsts = readl(hsotg->regs + DSTS);
+ dev_dbg(hsotg->dev, "DSTS=0x%0x\n", dsts);
+ dev_dbg(hsotg->dev,
+ "DSTS.Suspend Status=%d HWCFG4.Power Optimize=%d\n",
+ !!(dsts & DSTS_SUSPSTS),
+ hsotg->hw_params.power_optimized);
+ } else {
+ if (hsotg->op_state == OTG_STATE_A_PERIPHERAL) {
+ dev_dbg(hsotg->dev, "a_peripheral->a_host\n");
+
+ /* Clear the a_peripheral flag, back to a_host */
+ spin_unlock(&hsotg->lock);
+ dwc2_hcd_start(hsotg);
+ spin_lock(&hsotg->lock);
+ hsotg->op_state = OTG_STATE_A_HOST;
+ }
+ }
+
+ /* Change to L2 (suspend) state */
+ hsotg->lx_state = DWC2_L2;
+
+ /* Clear interrupt */
+ writel(GINTSTS_USBSUSP, hsotg->regs + GINTSTS);
+}
+
+#define GINTMSK_COMMON (GINTSTS_WKUPINT | GINTSTS_SESSREQINT | \
+ GINTSTS_CONIDSTSCHNG | GINTSTS_OTGINT | \
+ GINTSTS_MODEMIS | GINTSTS_DISCONNINT | \
+ GINTSTS_USBSUSP | GINTSTS_PRTINT)
+
+/*
+ * This function returns the Core Interrupt register
+ */
+static u32 dwc2_read_common_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 gintsts;
+ u32 gintmsk;
+ u32 gahbcfg;
+ u32 gintmsk_common = GINTMSK_COMMON;
+
+ gintsts = readl(hsotg->regs + GINTSTS);
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gahbcfg = readl(hsotg->regs + GAHBCFG);
+
+ /* If any common interrupts set */
+ if (gintsts & gintmsk_common)
+ dev_dbg(hsotg->dev, "gintsts=%08x gintmsk=%08x\n",
+ gintsts, gintmsk);
+
+ if (gahbcfg & GAHBCFG_GLBL_INTR_EN)
+ return gintsts & gintmsk & gintmsk_common;
+ else
+ return 0;
+}
+
+/*
+ * Common interrupt handler
+ *
+ * The common interrupts are those that occur in both Host and Device mode.
+ * This handler handles the following interrupts:
+ * - Mode Mismatch Interrupt
+ * - OTG Interrupt
+ * - Connector ID Status Change Interrupt
+ * - Disconnect Interrupt
+ * - Session Request Interrupt
+ * - Resume / Remote Wakeup Detected Interrupt
+ * - Suspend Interrupt
+ */
+irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
+{
+ struct dwc2_hsotg *hsotg = dev;
+ u32 gintsts;
+ irqreturn_t retval = IRQ_NONE;
+
+ if (!dwc2_is_controller_alive(hsotg)) {
+ dev_warn(hsotg->dev, "Controller is dead\n");
+ goto out;
+ }
+
+ spin_lock(&hsotg->lock);
+
+ gintsts = dwc2_read_common_intr(hsotg);
+ if (gintsts & ~GINTSTS_PRTINT)
+ retval = IRQ_HANDLED;
+
+ if (gintsts & GINTSTS_MODEMIS)
+ dwc2_handle_mode_mismatch_intr(hsotg);
+ if (gintsts & GINTSTS_OTGINT)
+ dwc2_handle_otg_intr(hsotg);
+ if (gintsts & GINTSTS_CONIDSTSCHNG)
+ dwc2_handle_conn_id_status_change_intr(hsotg);
+ if (gintsts & GINTSTS_DISCONNINT)
+ dwc2_handle_disconnect_intr(hsotg);
+ if (gintsts & GINTSTS_SESSREQINT)
+ dwc2_handle_session_req_intr(hsotg);
+ if (gintsts & GINTSTS_WKUPINT)
+ dwc2_handle_wakeup_detected_intr(hsotg);
+ if (gintsts & GINTSTS_USBSUSP)
+ dwc2_handle_usb_suspend_intr(hsotg);
+
+ if (gintsts & GINTSTS_PRTINT) {
+ /*
+ * The port interrupt occurs while in device mode with HPRT0
+ * Port Enable/Disable
+ */
+ if (dwc2_is_device_mode(hsotg)) {
+ dev_dbg(hsotg->dev,
+ " --Port interrupt received in Device mode--\n");
+ gintsts = GINTSTS_PRTINT;
+ writel(gintsts, hsotg->regs + GINTSTS);
+ retval = 1;
+ }
+ }
+
+ spin_unlock(&hsotg->lock);
+out:
+ return retval;
+}
+EXPORT_SYMBOL_GPL(dwc2_handle_common_intr);
--- /dev/null
+/*
+ * hcd.c - DesignWare HS OTG Controller host-mode routines
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file contains the core HCD code, and implements the Linux hc_driver
+ * API
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <linux/usb/hcd.h>
+#include <linux/usb/ch11.h>
+
+#include "core.h"
+#include "hcd.h"
+
+/**
+ * dwc2_dump_channel_info() - Prints the state of a host channel
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @chan: Pointer to the channel to dump
+ *
+ * Must be called with interrupt disabled and spinlock held
+ *
+ * NOTE: This function will be removed once the peripheral controller code
+ * is integrated and the driver is stable
+ */
+static void dwc2_dump_channel_info(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan)
+{
+#ifdef VERBOSE_DEBUG
+ int num_channels = hsotg->core_params->host_channels;
+ struct dwc2_qh *qh;
+ u32 hcchar;
+ u32 hcsplt;
+ u32 hctsiz;
+ u32 hc_dma;
+ int i;
+
+ if (chan == NULL)
+ return;
+
+ hcchar = readl(hsotg->regs + HCCHAR(chan->hc_num));
+ hcsplt = readl(hsotg->regs + HCSPLT(chan->hc_num));
+ hctsiz = readl(hsotg->regs + HCTSIZ(chan->hc_num));
+ hc_dma = readl(hsotg->regs + HCDMA(chan->hc_num));
+
+ dev_dbg(hsotg->dev, " Assigned to channel %p:\n", chan);
+ dev_dbg(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n",
+ hcchar, hcsplt);
+ dev_dbg(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n",
+ hctsiz, hc_dma);
+ dev_dbg(hsotg->dev, " dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
+ chan->dev_addr, chan->ep_num, chan->ep_is_in);
+ dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type);
+ dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
+ dev_dbg(hsotg->dev, " data_pid_start: %d\n", chan->data_pid_start);
+ dev_dbg(hsotg->dev, " xfer_started: %d\n", chan->xfer_started);
+ dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status);
+ dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf);
+ dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
+ (unsigned long)chan->xfer_dma);
+ dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len);
+ dev_dbg(hsotg->dev, " qh: %p\n", chan->qh);
+ dev_dbg(hsotg->dev, " NP inactive sched:\n");
+ list_for_each_entry(qh, &hsotg->non_periodic_sched_inactive,
+ qh_list_entry)
+ dev_dbg(hsotg->dev, " %p\n", qh);
+ dev_dbg(hsotg->dev, " NP active sched:\n");
+ list_for_each_entry(qh, &hsotg->non_periodic_sched_active,
+ qh_list_entry)
+ dev_dbg(hsotg->dev, " %p\n", qh);
+ dev_dbg(hsotg->dev, " Channels:\n");
+ for (i = 0; i < num_channels; i++) {
+ struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
+
+ dev_dbg(hsotg->dev, " %2d: %p\n", i, chan);
+ }
+#endif /* VERBOSE_DEBUG */
+}
+
+/*
+ * Processes all the URBs in a single list of QHs. Completes them with
+ * -ETIMEDOUT and frees the QTD.
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+static void dwc2_kill_urbs_in_qh_list(struct dwc2_hsotg *hsotg,
+ struct list_head *qh_list)
+{
+ struct dwc2_qh *qh, *qh_tmp;
+ struct dwc2_qtd *qtd, *qtd_tmp;
+
+ list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) {
+ list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list,
+ qtd_list_entry) {
+ dwc2_host_complete(hsotg, qtd, -ETIMEDOUT);
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
+ }
+ }
+}
+
+static void dwc2_qh_list_free(struct dwc2_hsotg *hsotg,
+ struct list_head *qh_list)
+{
+ struct dwc2_qtd *qtd, *qtd_tmp;
+ struct dwc2_qh *qh, *qh_tmp;
+ unsigned long flags;
+
+ if (!qh_list->next)
+ /* The list hasn't been initialized yet */
+ return;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ /* Ensure there are no QTDs or URBs left */
+ dwc2_kill_urbs_in_qh_list(hsotg, qh_list);
+
+ list_for_each_entry_safe(qh, qh_tmp, qh_list, qh_list_entry) {
+ dwc2_hcd_qh_unlink(hsotg, qh);
+
+ /* Free each QTD in the QH's QTD list */
+ list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list,
+ qtd_list_entry)
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ dwc2_hcd_qh_free(hsotg, qh);
+ spin_lock_irqsave(&hsotg->lock, flags);
+ }
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+}
+
+/*
+ * Responds with an error status of -ETIMEDOUT to all URBs in the non-periodic
+ * and periodic schedules. The QTD associated with each URB is removed from
+ * the schedule and freed. This function may be called when a disconnect is
+ * detected or when the HCD is being stopped.
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+static void dwc2_kill_all_urbs(struct dwc2_hsotg *hsotg)
+{
+ dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_inactive);
+ dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->non_periodic_sched_active);
+ dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_inactive);
+ dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_ready);
+ dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_assigned);
+ dwc2_kill_urbs_in_qh_list(hsotg, &hsotg->periodic_sched_queued);
+}
+
+/**
+ * dwc2_hcd_start() - Starts the HCD when switching to Host mode
+ *
+ * @hsotg: Pointer to struct dwc2_hsotg
+ */
+void dwc2_hcd_start(struct dwc2_hsotg *hsotg)
+{
+ u32 hprt0;
+
+ if (hsotg->op_state == OTG_STATE_B_HOST) {
+ /*
+ * Reset the port. During a HNP mode switch the reset
+ * needs to occur within 1ms and have a duration of at
+ * least 50ms.
+ */
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 |= HPRT0_RST;
+ writel(hprt0, hsotg->regs + HPRT0);
+ }
+
+ queue_delayed_work(hsotg->wq_otg, &hsotg->start_work,
+ msecs_to_jiffies(50));
+}
+
+/* Must be called with interrupt disabled and spinlock held */
+static void dwc2_hcd_cleanup_channels(struct dwc2_hsotg *hsotg)
+{
+ int num_channels = hsotg->core_params->host_channels;
+ struct dwc2_host_chan *channel;
+ u32 hcchar;
+ int i;
+
+ if (hsotg->core_params->dma_enable <= 0) {
+ /* Flush out any channel requests in slave mode */
+ for (i = 0; i < num_channels; i++) {
+ channel = hsotg->hc_ptr_array[i];
+ if (!list_empty(&channel->hc_list_entry))
+ continue;
+ hcchar = readl(hsotg->regs + HCCHAR(i));
+ if (hcchar & HCCHAR_CHENA) {
+ hcchar &= ~(HCCHAR_CHENA | HCCHAR_EPDIR);
+ hcchar |= HCCHAR_CHDIS;
+ writel(hcchar, hsotg->regs + HCCHAR(i));
+ }
+ }
+ }
+
+ for (i = 0; i < num_channels; i++) {
+ channel = hsotg->hc_ptr_array[i];
+ if (!list_empty(&channel->hc_list_entry))
+ continue;
+ hcchar = readl(hsotg->regs + HCCHAR(i));
+ if (hcchar & HCCHAR_CHENA) {
+ /* Halt the channel */
+ hcchar |= HCCHAR_CHDIS;
+ writel(hcchar, hsotg->regs + HCCHAR(i));
+ }
+
+ dwc2_hc_cleanup(hsotg, channel);
+ list_add_tail(&channel->hc_list_entry, &hsotg->free_hc_list);
+ /*
+ * Added for Descriptor DMA to prevent channel double cleanup in
+ * release_channel_ddma(), which is called from ep_disable when
+ * device disconnects
+ */
+ channel->qh = NULL;
+ }
+}
+
+/**
+ * dwc2_hcd_disconnect() - Handles disconnect of the HCD
+ *
+ * @hsotg: Pointer to struct dwc2_hsotg
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg)
+{
+ u32 intr;
+
+ /* Set status flags for the hub driver */
+ hsotg->flags.b.port_connect_status_change = 1;
+ hsotg->flags.b.port_connect_status = 0;
+
+ /*
+ * Shutdown any transfers in process by clearing the Tx FIFO Empty
+ * interrupt mask and status bits and disabling subsequent host
+ * channel interrupts.
+ */
+ intr = readl(hsotg->regs + GINTMSK);
+ intr &= ~(GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT);
+ writel(intr, hsotg->regs + GINTMSK);
+ intr = GINTSTS_NPTXFEMP | GINTSTS_PTXFEMP | GINTSTS_HCHINT;
+ writel(intr, hsotg->regs + GINTSTS);
+
+ /*
+ * Turn off the vbus power only if the core has transitioned to device
+ * mode. If still in host mode, need to keep power on to detect a
+ * reconnection.
+ */
+ if (dwc2_is_device_mode(hsotg)) {
+ if (hsotg->op_state != OTG_STATE_A_SUSPEND) {
+ dev_dbg(hsotg->dev, "Disconnect: PortPower off\n");
+ writel(0, hsotg->regs + HPRT0);
+ }
+
+ dwc2_disable_host_interrupts(hsotg);
+ }
+
+ /* Respond with an error status to all URBs in the schedule */
+ dwc2_kill_all_urbs(hsotg);
+
+ if (dwc2_is_host_mode(hsotg))
+ /* Clean up any host channels that were in use */
+ dwc2_hcd_cleanup_channels(hsotg);
+
+ dwc2_host_disconnect(hsotg);
+}
+
+/**
+ * dwc2_hcd_rem_wakeup() - Handles Remote Wakeup
+ *
+ * @hsotg: Pointer to struct dwc2_hsotg
+ */
+static void dwc2_hcd_rem_wakeup(struct dwc2_hsotg *hsotg)
+{
+ if (hsotg->lx_state == DWC2_L2)
+ hsotg->flags.b.port_suspend_change = 1;
+ else
+ hsotg->flags.b.port_l1_change = 1;
+}
+
+/**
+ * dwc2_hcd_stop() - Halts the DWC_otg host mode operations in a clean manner
+ *
+ * @hsotg: Pointer to struct dwc2_hsotg
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+void dwc2_hcd_stop(struct dwc2_hsotg *hsotg)
+{
+ dev_dbg(hsotg->dev, "DWC OTG HCD STOP\n");
+
+ /*
+ * The root hub should be disconnected before this function is called.
+ * The disconnect will clear the QTD lists (via ..._hcd_urb_dequeue)
+ * and the QH lists (via ..._hcd_endpoint_disable).
+ */
+
+ /* Turn off all host-specific interrupts */
+ dwc2_disable_host_interrupts(hsotg);
+
+ /* Turn off the vbus power */
+ dev_dbg(hsotg->dev, "PortPower off\n");
+ writel(0, hsotg->regs + HPRT0);
+}
+
+static int dwc2_hcd_urb_enqueue(struct dwc2_hsotg *hsotg,
+ struct dwc2_hcd_urb *urb, void **ep_handle,
+ gfp_t mem_flags)
+{
+ struct dwc2_qtd *qtd;
+ unsigned long flags;
+ u32 intr_mask;
+ int retval;
+ int dev_speed;
+
+ if (!hsotg->flags.b.port_connect_status) {
+ /* No longer connected */
+ dev_err(hsotg->dev, "Not connected\n");
+ return -ENODEV;
+ }
+
+ dev_speed = dwc2_host_get_speed(hsotg, urb->priv);
+
+ /* Some configurations cannot support LS traffic on a FS root port */
+ if ((dev_speed == USB_SPEED_LOW) &&
+ (hsotg->hw_params.fs_phy_type == GHWCFG2_FS_PHY_TYPE_DEDICATED) &&
+ (hsotg->hw_params.hs_phy_type == GHWCFG2_HS_PHY_TYPE_UTMI)) {
+ u32 hprt0 = readl(hsotg->regs + HPRT0);
+ u32 prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
+
+ if (prtspd == HPRT0_SPD_FULL_SPEED)
+ return -ENODEV;
+ }
+
+ qtd = kzalloc(sizeof(*qtd), mem_flags);
+ if (!qtd)
+ return -ENOMEM;
+
+ dwc2_hcd_qtd_init(qtd, urb);
+ retval = dwc2_hcd_qtd_add(hsotg, qtd, (struct dwc2_qh **)ep_handle,
+ mem_flags);
+ if (retval) {
+ dev_err(hsotg->dev,
+ "DWC OTG HCD URB Enqueue failed adding QTD. Error status %d\n",
+ retval);
+ kfree(qtd);
+ return retval;
+ }
+
+ intr_mask = readl(hsotg->regs + GINTMSK);
+ if (!(intr_mask & GINTSTS_SOF)) {
+ enum dwc2_transaction_type tr_type;
+
+ if (qtd->qh->ep_type == USB_ENDPOINT_XFER_BULK &&
+ !(qtd->urb->flags & URB_GIVEBACK_ASAP))
+ /*
+ * Do not schedule SG transactions until qtd has
+ * URB_GIVEBACK_ASAP set
+ */
+ return 0;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+ tr_type = dwc2_hcd_select_transactions(hsotg);
+ if (tr_type != DWC2_TRANSACTION_NONE)
+ dwc2_hcd_queue_transactions(hsotg, tr_type);
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ }
+
+ return 0;
+}
+
+/* Must be called with interrupt disabled and spinlock held */
+static int dwc2_hcd_urb_dequeue(struct dwc2_hsotg *hsotg,
+ struct dwc2_hcd_urb *urb)
+{
+ struct dwc2_qh *qh;
+ struct dwc2_qtd *urb_qtd;
+
+ urb_qtd = urb->qtd;
+ if (!urb_qtd) {
+ dev_dbg(hsotg->dev, "## Urb QTD is NULL ##\n");
+ return -EINVAL;
+ }
+
+ qh = urb_qtd->qh;
+ if (!qh) {
+ dev_dbg(hsotg->dev, "## Urb QTD QH is NULL ##\n");
+ return -EINVAL;
+ }
+
+ urb->priv = NULL;
+
+ if (urb_qtd->in_process && qh->channel) {
+ dwc2_dump_channel_info(hsotg, qh->channel);
+
+ /* The QTD is in process (it has been assigned to a channel) */
+ if (hsotg->flags.b.port_connect_status)
+ /*
+ * If still connected (i.e. in host mode), halt the
+ * channel so it can be used for other transfers. If
+ * no longer connected, the host registers can't be
+ * written to halt the channel since the core is in
+ * device mode.
+ */
+ dwc2_hc_halt(hsotg, qh->channel,
+ DWC2_HC_XFER_URB_DEQUEUE);
+ }
+
+ /*
+ * Free the QTD and clean up the associated QH. Leave the QH in the
+ * schedule if it has any remaining QTDs.
+ */
+ if (hsotg->core_params->dma_desc_enable <= 0) {
+ u8 in_process = urb_qtd->in_process;
+
+ dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh);
+ if (in_process) {
+ dwc2_hcd_qh_deactivate(hsotg, qh, 0);
+ qh->channel = NULL;
+ } else if (list_empty(&qh->qtd_list)) {
+ dwc2_hcd_qh_unlink(hsotg, qh);
+ }
+ } else {
+ dwc2_hcd_qtd_unlink_and_free(hsotg, urb_qtd, qh);
+ }
+
+ return 0;
+}
+
+/* Must NOT be called with interrupt disabled or spinlock held */
+static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg,
+ struct usb_host_endpoint *ep, int retry)
+{
+ struct dwc2_qtd *qtd, *qtd_tmp;
+ struct dwc2_qh *qh;
+ unsigned long flags;
+ int rc;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ qh = ep->hcpriv;
+ if (!qh) {
+ rc = -EINVAL;
+ goto err;
+ }
+
+ while (!list_empty(&qh->qtd_list) && retry--) {
+ if (retry == 0) {
+ dev_err(hsotg->dev,
+ "## timeout in dwc2_hcd_endpoint_disable() ##\n");
+ rc = -EBUSY;
+ goto err;
+ }
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ usleep_range(20000, 40000);
+ spin_lock_irqsave(&hsotg->lock, flags);
+ qh = ep->hcpriv;
+ if (!qh) {
+ rc = -EINVAL;
+ goto err;
+ }
+ }
+
+ dwc2_hcd_qh_unlink(hsotg, qh);
+
+ /* Free each QTD in the QH's QTD list */
+ list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry)
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
+
+ ep->hcpriv = NULL;
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ dwc2_hcd_qh_free(hsotg, qh);
+
+ return 0;
+
+err:
+ ep->hcpriv = NULL;
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+
+ return rc;
+}
+
+/* Must be called with interrupt disabled and spinlock held */
+static int dwc2_hcd_endpoint_reset(struct dwc2_hsotg *hsotg,
+ struct usb_host_endpoint *ep)
+{
+ struct dwc2_qh *qh = ep->hcpriv;
+
+ if (!qh)
+ return -EINVAL;
+
+ qh->data_toggle = DWC2_HC_PID_DATA0;
+
+ return 0;
+}
+
+/*
+ * Initializes dynamic portions of the DWC_otg HCD state
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+static void dwc2_hcd_reinit(struct dwc2_hsotg *hsotg)
+{
+ struct dwc2_host_chan *chan, *chan_tmp;
+ int num_channels;
+ int i;
+
+ hsotg->flags.d32 = 0;
+ hsotg->non_periodic_qh_ptr = &hsotg->non_periodic_sched_active;
+
+ if (hsotg->core_params->uframe_sched > 0) {
+ hsotg->available_host_channels =
+ hsotg->core_params->host_channels;
+ } else {
+ hsotg->non_periodic_channels = 0;
+ hsotg->periodic_channels = 0;
+ }
+
+ /*
+ * Put all channels in the free channel list and clean up channel
+ * states
+ */
+ list_for_each_entry_safe(chan, chan_tmp, &hsotg->free_hc_list,
+ hc_list_entry)
+ list_del_init(&chan->hc_list_entry);
+
+ num_channels = hsotg->core_params->host_channels;
+ for (i = 0; i < num_channels; i++) {
+ chan = hsotg->hc_ptr_array[i];
+ list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
+ dwc2_hc_cleanup(hsotg, chan);
+ }
+
+ /* Initialize the DWC core for host mode operation */
+ dwc2_core_host_init(hsotg);
+}
+
+static void dwc2_hc_init_split(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb)
+{
+ int hub_addr, hub_port;
+
+ chan->do_split = 1;
+ chan->xact_pos = qtd->isoc_split_pos;
+ chan->complete_split = qtd->complete_split;
+ dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port);
+ chan->hub_addr = (u8)hub_addr;
+ chan->hub_port = (u8)hub_port;
+}
+
+static void *dwc2_hc_init_xfer(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ struct dwc2_qtd *qtd, void *bufptr)
+{
+ struct dwc2_hcd_urb *urb = qtd->urb;
+ struct dwc2_hcd_iso_packet_desc *frame_desc;
+
+ switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ chan->ep_type = USB_ENDPOINT_XFER_CONTROL;
+
+ switch (qtd->control_phase) {
+ case DWC2_CONTROL_SETUP:
+ dev_vdbg(hsotg->dev, " Control setup transaction\n");
+ chan->do_ping = 0;
+ chan->ep_is_in = 0;
+ chan->data_pid_start = DWC2_HC_PID_SETUP;
+ if (hsotg->core_params->dma_enable > 0)
+ chan->xfer_dma = urb->setup_dma;
+ else
+ chan->xfer_buf = urb->setup_packet;
+ chan->xfer_len = 8;
+ bufptr = NULL;
+ break;
+
+ case DWC2_CONTROL_DATA:
+ dev_vdbg(hsotg->dev, " Control data transaction\n");
+ chan->data_pid_start = qtd->data_toggle;
+ break;
+
+ case DWC2_CONTROL_STATUS:
+ /*
+ * Direction is opposite of data direction or IN if no
+ * data
+ */
+ dev_vdbg(hsotg->dev, " Control status transaction\n");
+ if (urb->length == 0)
+ chan->ep_is_in = 1;
+ else
+ chan->ep_is_in =
+ dwc2_hcd_is_pipe_out(&urb->pipe_info);
+ if (chan->ep_is_in)
+ chan->do_ping = 0;
+ chan->data_pid_start = DWC2_HC_PID_DATA1;
+ chan->xfer_len = 0;
+ if (hsotg->core_params->dma_enable > 0)
+ chan->xfer_dma = hsotg->status_buf_dma;
+ else
+ chan->xfer_buf = hsotg->status_buf;
+ bufptr = NULL;
+ break;
+ }
+ break;
+
+ case USB_ENDPOINT_XFER_BULK:
+ chan->ep_type = USB_ENDPOINT_XFER_BULK;
+ break;
+
+ case USB_ENDPOINT_XFER_INT:
+ chan->ep_type = USB_ENDPOINT_XFER_INT;
+ break;
+
+ case USB_ENDPOINT_XFER_ISOC:
+ chan->ep_type = USB_ENDPOINT_XFER_ISOC;
+ if (hsotg->core_params->dma_desc_enable > 0)
+ break;
+
+ frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
+ frame_desc->status = 0;
+
+ if (hsotg->core_params->dma_enable > 0) {
+ chan->xfer_dma = urb->dma;
+ chan->xfer_dma += frame_desc->offset +
+ qtd->isoc_split_offset;
+ } else {
+ chan->xfer_buf = urb->buf;
+ chan->xfer_buf += frame_desc->offset +
+ qtd->isoc_split_offset;
+ }
+
+ chan->xfer_len = frame_desc->length - qtd->isoc_split_offset;
+
+ /* For non-dword aligned buffers */
+ if (hsotg->core_params->dma_enable > 0 &&
+ (chan->xfer_dma & 0x3))
+ bufptr = (u8 *)urb->buf + frame_desc->offset +
+ qtd->isoc_split_offset;
+ else
+ bufptr = NULL;
+
+ if (chan->xact_pos == DWC2_HCSPLT_XACTPOS_ALL) {
+ if (chan->xfer_len <= 188)
+ chan->xact_pos = DWC2_HCSPLT_XACTPOS_ALL;
+ else
+ chan->xact_pos = DWC2_HCSPLT_XACTPOS_BEGIN;
+ }
+ break;
+ }
+
+ return bufptr;
+}
+
+static int dwc2_hc_setup_align_buf(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ struct dwc2_host_chan *chan, void *bufptr)
+{
+ u32 buf_size;
+
+ if (chan->ep_type != USB_ENDPOINT_XFER_ISOC)
+ buf_size = hsotg->core_params->max_transfer_size;
+ else
+ buf_size = 4096;
+
+ if (!qh->dw_align_buf) {
+ qh->dw_align_buf = dma_alloc_coherent(hsotg->dev, buf_size,
+ &qh->dw_align_buf_dma,
+ GFP_ATOMIC);
+ if (!qh->dw_align_buf)
+ return -ENOMEM;
+ }
+
+ if (!chan->ep_is_in && chan->xfer_len) {
+ dma_sync_single_for_cpu(hsotg->dev, chan->xfer_dma, buf_size,
+ DMA_TO_DEVICE);
+ memcpy(qh->dw_align_buf, bufptr, chan->xfer_len);
+ dma_sync_single_for_device(hsotg->dev, chan->xfer_dma, buf_size,
+ DMA_TO_DEVICE);
+ }
+
+ chan->align_buf = qh->dw_align_buf_dma;
+ return 0;
+}
+
+/**
+ * dwc2_assign_and_init_hc() - Assigns transactions from a QTD to a free host
+ * channel and initializes the host channel to perform the transactions. The
+ * host channel is removed from the free list.
+ *
+ * @hsotg: The HCD state structure
+ * @qh: Transactions from the first QTD for this QH are selected and assigned
+ * to a free host channel
+ */
+static int dwc2_assign_and_init_hc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ struct dwc2_host_chan *chan;
+ struct dwc2_hcd_urb *urb;
+ struct dwc2_qtd *qtd;
+ void *bufptr = NULL;
+
+ if (dbg_qh(qh))
+ dev_vdbg(hsotg->dev, "%s(%p,%p)\n", __func__, hsotg, qh);
+
+ if (list_empty(&qh->qtd_list)) {
+ dev_dbg(hsotg->dev, "No QTDs in QH list\n");
+ return -ENOMEM;
+ }
+
+ if (list_empty(&hsotg->free_hc_list)) {
+ dev_dbg(hsotg->dev, "No free channel to assign\n");
+ return -ENOMEM;
+ }
+
+ chan = list_first_entry(&hsotg->free_hc_list, struct dwc2_host_chan,
+ hc_list_entry);
+
+ /* Remove host channel from free list */
+ list_del_init(&chan->hc_list_entry);
+
+ qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry);
+ urb = qtd->urb;
+ qh->channel = chan;
+ qtd->in_process = 1;
+
+ /*
+ * Use usb_pipedevice to determine device address. This address is
+ * 0 before the SET_ADDRESS command and the correct address afterward.
+ */
+ chan->dev_addr = dwc2_hcd_get_dev_addr(&urb->pipe_info);
+ chan->ep_num = dwc2_hcd_get_ep_num(&urb->pipe_info);
+ chan->speed = qh->dev_speed;
+ chan->max_packet = dwc2_max_packet(qh->maxp);
+
+ chan->xfer_started = 0;
+ chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS;
+ chan->error_state = (qtd->error_count > 0);
+ chan->halt_on_queue = 0;
+ chan->halt_pending = 0;
+ chan->requests = 0;
+
+ /*
+ * The following values may be modified in the transfer type section
+ * below. The xfer_len value may be reduced when the transfer is
+ * started to accommodate the max widths of the XferSize and PktCnt
+ * fields in the HCTSIZn register.
+ */
+
+ chan->ep_is_in = (dwc2_hcd_is_pipe_in(&urb->pipe_info) != 0);
+ if (chan->ep_is_in)
+ chan->do_ping = 0;
+ else
+ chan->do_ping = qh->ping_state;
+
+ chan->data_pid_start = qh->data_toggle;
+ chan->multi_count = 1;
+
+ if (urb->actual_length > urb->length &&
+ !dwc2_hcd_is_pipe_in(&urb->pipe_info))
+ urb->actual_length = urb->length;
+
+ if (hsotg->core_params->dma_enable > 0) {
+ chan->xfer_dma = urb->dma + urb->actual_length;
+
+ /* For non-dword aligned case */
+ if (hsotg->core_params->dma_desc_enable <= 0 &&
+ (chan->xfer_dma & 0x3))
+ bufptr = (u8 *)urb->buf + urb->actual_length;
+ } else {
+ chan->xfer_buf = (u8 *)urb->buf + urb->actual_length;
+ }
+
+ chan->xfer_len = urb->length - urb->actual_length;
+ chan->xfer_count = 0;
+
+ /* Set the split attributes if required */
+ if (qh->do_split)
+ dwc2_hc_init_split(hsotg, chan, qtd, urb);
+ else
+ chan->do_split = 0;
+
+ /* Set the transfer attributes */
+ bufptr = dwc2_hc_init_xfer(hsotg, chan, qtd, bufptr);
+
+ /* Non DWORD-aligned buffer case */
+ if (bufptr) {
+ dev_vdbg(hsotg->dev, "Non-aligned buffer\n");
+ if (dwc2_hc_setup_align_buf(hsotg, qh, chan, bufptr)) {
+ dev_err(hsotg->dev,
+ "%s: Failed to allocate memory to handle non-dword aligned buffer\n",
+ __func__);
+ /* Add channel back to free list */
+ chan->align_buf = 0;
+ chan->multi_count = 0;
+ list_add_tail(&chan->hc_list_entry,
+ &hsotg->free_hc_list);
+ qtd->in_process = 0;
+ qh->channel = NULL;
+ return -ENOMEM;
+ }
+ } else {
+ chan->align_buf = 0;
+ }
+
+ if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC)
+ /*
+ * This value may be modified when the transfer is started
+ * to reflect the actual transfer length
+ */
+ chan->multi_count = dwc2_hb_mult(qh->maxp);
+
+ if (hsotg->core_params->dma_desc_enable > 0)
+ chan->desc_list_addr = qh->desc_list_dma;
+
+ dwc2_hc_init(hsotg, chan);
+ chan->qh = qh;
+
+ return 0;
+}
+
+/**
+ * dwc2_hcd_select_transactions() - Selects transactions from the HCD transfer
+ * schedule and assigns them to available host channels. Called from the HCD
+ * interrupt handler functions.
+ *
+ * @hsotg: The HCD state structure
+ *
+ * Return: The types of new transactions that were assigned to host channels
+ */
+enum dwc2_transaction_type dwc2_hcd_select_transactions(
+ struct dwc2_hsotg *hsotg)
+{
+ enum dwc2_transaction_type ret_val = DWC2_TRANSACTION_NONE;
+ struct list_head *qh_ptr;
+ struct dwc2_qh *qh;
+ int num_channels;
+
+#ifdef DWC2_DEBUG_SOF
+ dev_vdbg(hsotg->dev, " Select Transactions\n");
+#endif
+
+ /* Process entries in the periodic ready list */
+ qh_ptr = hsotg->periodic_sched_ready.next;
+ while (qh_ptr != &hsotg->periodic_sched_ready) {
+ if (list_empty(&hsotg->free_hc_list))
+ break;
+ if (hsotg->core_params->uframe_sched > 0) {
+ if (hsotg->available_host_channels <= 1)
+ break;
+ hsotg->available_host_channels--;
+ }
+ qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
+ if (dwc2_assign_and_init_hc(hsotg, qh))
+ break;
+
+ /*
+ * Move the QH from the periodic ready schedule to the
+ * periodic assigned schedule
+ */
+ qh_ptr = qh_ptr->next;
+ list_move(&qh->qh_list_entry, &hsotg->periodic_sched_assigned);
+ ret_val = DWC2_TRANSACTION_PERIODIC;
+ }
+
+ /*
+ * Process entries in the inactive portion of the non-periodic
+ * schedule. Some free host channels may not be used if they are
+ * reserved for periodic transfers.
+ */
+ num_channels = hsotg->core_params->host_channels;
+ qh_ptr = hsotg->non_periodic_sched_inactive.next;
+ while (qh_ptr != &hsotg->non_periodic_sched_inactive) {
+ if (hsotg->core_params->uframe_sched <= 0 &&
+ hsotg->non_periodic_channels >= num_channels -
+ hsotg->periodic_channels)
+ break;
+ if (list_empty(&hsotg->free_hc_list))
+ break;
+ qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
+ if (hsotg->core_params->uframe_sched > 0) {
+ if (hsotg->available_host_channels < 1)
+ break;
+ hsotg->available_host_channels--;
+ }
+
+ if (dwc2_assign_and_init_hc(hsotg, qh))
+ break;
+
+ /*
+ * Move the QH from the non-periodic inactive schedule to the
+ * non-periodic active schedule
+ */
+ qh_ptr = qh_ptr->next;
+ list_move(&qh->qh_list_entry,
+ &hsotg->non_periodic_sched_active);
+
+ if (ret_val == DWC2_TRANSACTION_NONE)
+ ret_val = DWC2_TRANSACTION_NON_PERIODIC;
+ else
+ ret_val = DWC2_TRANSACTION_ALL;
+
+ if (hsotg->core_params->uframe_sched <= 0)
+ hsotg->non_periodic_channels++;
+ }
+
+ return ret_val;
+}
+
+/**
+ * dwc2_queue_transaction() - Attempts to queue a single transaction request for
+ * a host channel associated with either a periodic or non-periodic transfer
+ *
+ * @hsotg: The HCD state structure
+ * @chan: Host channel descriptor associated with either a periodic or
+ * non-periodic transfer
+ * @fifo_dwords_avail: Number of DWORDs available in the periodic Tx FIFO
+ * for periodic transfers or the non-periodic Tx FIFO
+ * for non-periodic transfers
+ *
+ * Return: 1 if a request is queued and more requests may be needed to
+ * complete the transfer, 0 if no more requests are required for this
+ * transfer, -1 if there is insufficient space in the Tx FIFO
+ *
+ * This function assumes that there is space available in the appropriate
+ * request queue. For an OUT transfer or SETUP transaction in Slave mode,
+ * it checks whether space is available in the appropriate Tx FIFO.
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+static int dwc2_queue_transaction(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ u16 fifo_dwords_avail)
+{
+ int retval = 0;
+
+ if (hsotg->core_params->dma_enable > 0) {
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ if (!chan->xfer_started ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ dwc2_hcd_start_xfer_ddma(hsotg, chan->qh);
+ chan->qh->ping_state = 0;
+ }
+ } else if (!chan->xfer_started) {
+ dwc2_hc_start_transfer(hsotg, chan);
+ chan->qh->ping_state = 0;
+ }
+ } else if (chan->halt_pending) {
+ /* Don't queue a request if the channel has been halted */
+ } else if (chan->halt_on_queue) {
+ dwc2_hc_halt(hsotg, chan, chan->halt_status);
+ } else if (chan->do_ping) {
+ if (!chan->xfer_started)
+ dwc2_hc_start_transfer(hsotg, chan);
+ } else if (!chan->ep_is_in ||
+ chan->data_pid_start == DWC2_HC_PID_SETUP) {
+ if ((fifo_dwords_avail * 4) >= chan->max_packet) {
+ if (!chan->xfer_started) {
+ dwc2_hc_start_transfer(hsotg, chan);
+ retval = 1;
+ } else {
+ retval = dwc2_hc_continue_transfer(hsotg, chan);
+ }
+ } else {
+ retval = -1;
+ }
+ } else {
+ if (!chan->xfer_started) {
+ dwc2_hc_start_transfer(hsotg, chan);
+ retval = 1;
+ } else {
+ retval = dwc2_hc_continue_transfer(hsotg, chan);
+ }
+ }
+
+ return retval;
+}
+
+/*
+ * Processes periodic channels for the next frame and queues transactions for
+ * these channels to the DWC_otg controller. After queueing transactions, the
+ * Periodic Tx FIFO Empty interrupt is enabled if there are more transactions
+ * to queue as Periodic Tx FIFO or request queue space becomes available.
+ * Otherwise, the Periodic Tx FIFO Empty interrupt is disabled.
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+static void dwc2_process_periodic_channels(struct dwc2_hsotg *hsotg)
+{
+ struct list_head *qh_ptr;
+ struct dwc2_qh *qh;
+ u32 tx_status;
+ u32 fspcavail;
+ u32 gintmsk;
+ int status;
+ int no_queue_space = 0;
+ int no_fifo_space = 0;
+ u32 qspcavail;
+
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, "Queue periodic transactions\n");
+
+ tx_status = readl(hsotg->regs + HPTXSTS);
+ qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
+ TXSTS_QSPCAVAIL_SHIFT;
+ fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
+ TXSTS_FSPCAVAIL_SHIFT;
+
+ if (dbg_perio()) {
+ dev_vdbg(hsotg->dev, " P Tx Req Queue Space Avail (before queue): %d\n",
+ qspcavail);
+ dev_vdbg(hsotg->dev, " P Tx FIFO Space Avail (before queue): %d\n",
+ fspcavail);
+ }
+
+ qh_ptr = hsotg->periodic_sched_assigned.next;
+ while (qh_ptr != &hsotg->periodic_sched_assigned) {
+ tx_status = readl(hsotg->regs + HPTXSTS);
+ qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
+ TXSTS_QSPCAVAIL_SHIFT;
+ if (qspcavail == 0) {
+ no_queue_space = 1;
+ break;
+ }
+
+ qh = list_entry(qh_ptr, struct dwc2_qh, qh_list_entry);
+ if (!qh->channel) {
+ qh_ptr = qh_ptr->next;
+ continue;
+ }
+
+ /* Make sure EP's TT buffer is clean before queueing qtds */
+ if (qh->tt_buffer_dirty) {
+ qh_ptr = qh_ptr->next;
+ continue;
+ }
+
+ /*
+ * Set a flag if we're queuing high-bandwidth in slave mode.
+ * The flag prevents any halts to get into the request queue in
+ * the middle of multiple high-bandwidth packets getting queued.
+ */
+ if (hsotg->core_params->dma_enable <= 0 &&
+ qh->channel->multi_count > 1)
+ hsotg->queuing_high_bandwidth = 1;
+
+ fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
+ TXSTS_FSPCAVAIL_SHIFT;
+ status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
+ if (status < 0) {
+ no_fifo_space = 1;
+ break;
+ }
+
+ /*
+ * In Slave mode, stay on the current transfer until there is
+ * nothing more to do or the high-bandwidth request count is
+ * reached. In DMA mode, only need to queue one request. The
+ * controller automatically handles multiple packets for
+ * high-bandwidth transfers.
+ */
+ if (hsotg->core_params->dma_enable > 0 || status == 0 ||
+ qh->channel->requests == qh->channel->multi_count) {
+ qh_ptr = qh_ptr->next;
+ /*
+ * Move the QH from the periodic assigned schedule to
+ * the periodic queued schedule
+ */
+ list_move(&qh->qh_list_entry,
+ &hsotg->periodic_sched_queued);
+
+ /* done queuing high bandwidth */
+ hsotg->queuing_high_bandwidth = 0;
+ }
+ }
+
+ if (hsotg->core_params->dma_enable <= 0) {
+ tx_status = readl(hsotg->regs + HPTXSTS);
+ qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
+ TXSTS_QSPCAVAIL_SHIFT;
+ fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
+ TXSTS_FSPCAVAIL_SHIFT;
+ if (dbg_perio()) {
+ dev_vdbg(hsotg->dev,
+ " P Tx Req Queue Space Avail (after queue): %d\n",
+ qspcavail);
+ dev_vdbg(hsotg->dev,
+ " P Tx FIFO Space Avail (after queue): %d\n",
+ fspcavail);
+ }
+
+ if (!list_empty(&hsotg->periodic_sched_assigned) ||
+ no_queue_space || no_fifo_space) {
+ /*
+ * May need to queue more transactions as the request
+ * queue or Tx FIFO empties. Enable the periodic Tx
+ * FIFO empty interrupt. (Always use the half-empty
+ * level to ensure that new requests are loaded as
+ * soon as possible.)
+ */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk |= GINTSTS_PTXFEMP;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ } else {
+ /*
+ * Disable the Tx FIFO empty interrupt since there are
+ * no more transactions that need to be queued right
+ * now. This function is called from interrupt
+ * handlers to queue more transactions as transfer
+ * states change.
+ */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk &= ~GINTSTS_PTXFEMP;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ }
+ }
+}
+
+/*
+ * Processes active non-periodic channels and queues transactions for these
+ * channels to the DWC_otg controller. After queueing transactions, the NP Tx
+ * FIFO Empty interrupt is enabled if there are more transactions to queue as
+ * NP Tx FIFO or request queue space becomes available. Otherwise, the NP Tx
+ * FIFO Empty interrupt is disabled.
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+static void dwc2_process_non_periodic_channels(struct dwc2_hsotg *hsotg)
+{
+ struct list_head *orig_qh_ptr;
+ struct dwc2_qh *qh;
+ u32 tx_status;
+ u32 qspcavail;
+ u32 fspcavail;
+ u32 gintmsk;
+ int status;
+ int no_queue_space = 0;
+ int no_fifo_space = 0;
+ int more_to_do = 0;
+
+ dev_vdbg(hsotg->dev, "Queue non-periodic transactions\n");
+
+ tx_status = readl(hsotg->regs + GNPTXSTS);
+ qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
+ TXSTS_QSPCAVAIL_SHIFT;
+ fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
+ TXSTS_FSPCAVAIL_SHIFT;
+ dev_vdbg(hsotg->dev, " NP Tx Req Queue Space Avail (before queue): %d\n",
+ qspcavail);
+ dev_vdbg(hsotg->dev, " NP Tx FIFO Space Avail (before queue): %d\n",
+ fspcavail);
+
+ /*
+ * Keep track of the starting point. Skip over the start-of-list
+ * entry.
+ */
+ if (hsotg->non_periodic_qh_ptr == &hsotg->non_periodic_sched_active)
+ hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
+ orig_qh_ptr = hsotg->non_periodic_qh_ptr;
+
+ /*
+ * Process once through the active list or until no more space is
+ * available in the request queue or the Tx FIFO
+ */
+ do {
+ tx_status = readl(hsotg->regs + GNPTXSTS);
+ qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
+ TXSTS_QSPCAVAIL_SHIFT;
+ if (hsotg->core_params->dma_enable <= 0 && qspcavail == 0) {
+ no_queue_space = 1;
+ break;
+ }
+
+ qh = list_entry(hsotg->non_periodic_qh_ptr, struct dwc2_qh,
+ qh_list_entry);
+ if (!qh->channel)
+ goto next;
+
+ /* Make sure EP's TT buffer is clean before queueing qtds */
+ if (qh->tt_buffer_dirty)
+ goto next;
+
+ fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
+ TXSTS_FSPCAVAIL_SHIFT;
+ status = dwc2_queue_transaction(hsotg, qh->channel, fspcavail);
+
+ if (status > 0) {
+ more_to_do = 1;
+ } else if (status < 0) {
+ no_fifo_space = 1;
+ break;
+ }
+next:
+ /* Advance to next QH, skipping start-of-list entry */
+ hsotg->non_periodic_qh_ptr = hsotg->non_periodic_qh_ptr->next;
+ if (hsotg->non_periodic_qh_ptr ==
+ &hsotg->non_periodic_sched_active)
+ hsotg->non_periodic_qh_ptr =
+ hsotg->non_periodic_qh_ptr->next;
+ } while (hsotg->non_periodic_qh_ptr != orig_qh_ptr);
+
+ if (hsotg->core_params->dma_enable <= 0) {
+ tx_status = readl(hsotg->regs + GNPTXSTS);
+ qspcavail = (tx_status & TXSTS_QSPCAVAIL_MASK) >>
+ TXSTS_QSPCAVAIL_SHIFT;
+ fspcavail = (tx_status & TXSTS_FSPCAVAIL_MASK) >>
+ TXSTS_FSPCAVAIL_SHIFT;
+ dev_vdbg(hsotg->dev,
+ " NP Tx Req Queue Space Avail (after queue): %d\n",
+ qspcavail);
+ dev_vdbg(hsotg->dev,
+ " NP Tx FIFO Space Avail (after queue): %d\n",
+ fspcavail);
+
+ if (more_to_do || no_queue_space || no_fifo_space) {
+ /*
+ * May need to queue more transactions as the request
+ * queue or Tx FIFO empties. Enable the non-periodic
+ * Tx FIFO empty interrupt. (Always use the half-empty
+ * level to ensure that new requests are loaded as
+ * soon as possible.)
+ */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk |= GINTSTS_NPTXFEMP;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ } else {
+ /*
+ * Disable the Tx FIFO empty interrupt since there are
+ * no more transactions that need to be queued right
+ * now. This function is called from interrupt
+ * handlers to queue more transactions as transfer
+ * states change.
+ */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk &= ~GINTSTS_NPTXFEMP;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ }
+ }
+}
+
+/**
+ * dwc2_hcd_queue_transactions() - Processes the currently active host channels
+ * and queues transactions for these channels to the DWC_otg controller. Called
+ * from the HCD interrupt handler functions.
+ *
+ * @hsotg: The HCD state structure
+ * @tr_type: The type(s) of transactions to queue (non-periodic, periodic,
+ * or both)
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
+ enum dwc2_transaction_type tr_type)
+{
+#ifdef DWC2_DEBUG_SOF
+ dev_vdbg(hsotg->dev, "Queue Transactions\n");
+#endif
+ /* Process host channels associated with periodic transfers */
+ if ((tr_type == DWC2_TRANSACTION_PERIODIC ||
+ tr_type == DWC2_TRANSACTION_ALL) &&
+ !list_empty(&hsotg->periodic_sched_assigned))
+ dwc2_process_periodic_channels(hsotg);
+
+ /* Process host channels associated with non-periodic transfers */
+ if (tr_type == DWC2_TRANSACTION_NON_PERIODIC ||
+ tr_type == DWC2_TRANSACTION_ALL) {
+ if (!list_empty(&hsotg->non_periodic_sched_active)) {
+ dwc2_process_non_periodic_channels(hsotg);
+ } else {
+ /*
+ * Ensure NP Tx FIFO empty interrupt is disabled when
+ * there are no non-periodic transfers to process
+ */
+ u32 gintmsk = readl(hsotg->regs + GINTMSK);
+
+ gintmsk &= ~GINTSTS_NPTXFEMP;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ }
+ }
+}
+
+static void dwc2_conn_id_status_change(struct work_struct *work)
+{
+ struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
+ wf_otg);
+ u32 count = 0;
+ u32 gotgctl;
+
+ dev_dbg(hsotg->dev, "%s()\n", __func__);
+
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ dev_dbg(hsotg->dev, "gotgctl=%0x\n", gotgctl);
+ dev_dbg(hsotg->dev, "gotgctl.b.conidsts=%d\n",
+ !!(gotgctl & GOTGCTL_CONID_B));
+
+ /* B-Device connector (Device Mode) */
+ if (gotgctl & GOTGCTL_CONID_B) {
+ /* Wait for switch to device mode */
+ dev_dbg(hsotg->dev, "connId B\n");
+ while (!dwc2_is_device_mode(hsotg)) {
+ dev_info(hsotg->dev,
+ "Waiting for Peripheral Mode, Mode=%s\n",
+ dwc2_is_host_mode(hsotg) ? "Host" :
+ "Peripheral");
+ usleep_range(20000, 40000);
+ if (++count > 250)
+ break;
+ }
+ if (count > 250)
+ dev_err(hsotg->dev,
+ "Connection id status change timed out\n");
+ hsotg->op_state = OTG_STATE_B_PERIPHERAL;
+ dwc2_core_init(hsotg, false, -1);
+ dwc2_enable_global_interrupts(hsotg);
+ } else {
+ /* A-Device connector (Host Mode) */
+ dev_dbg(hsotg->dev, "connId A\n");
+ while (!dwc2_is_host_mode(hsotg)) {
+ dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n",
+ dwc2_is_host_mode(hsotg) ?
+ "Host" : "Peripheral");
+ usleep_range(20000, 40000);
+ if (++count > 250)
+ break;
+ }
+ if (count > 250)
+ dev_err(hsotg->dev,
+ "Connection id status change timed out\n");
+ hsotg->op_state = OTG_STATE_A_HOST;
+
+ /* Initialize the Core for Host mode */
+ dwc2_core_init(hsotg, false, -1);
+ dwc2_enable_global_interrupts(hsotg);
+ dwc2_hcd_start(hsotg);
+ }
+}
+
+static void dwc2_wakeup_detected(unsigned long data)
+{
+ struct dwc2_hsotg *hsotg = (struct dwc2_hsotg *)data;
+ u32 hprt0;
+
+ dev_dbg(hsotg->dev, "%s()\n", __func__);
+
+ /*
+ * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms
+ * so that OPT tests pass with all PHYs.)
+ */
+ hprt0 = dwc2_read_hprt0(hsotg);
+ dev_dbg(hsotg->dev, "Resume: HPRT0=%0x\n", hprt0);
+ hprt0 &= ~HPRT0_RES;
+ writel(hprt0, hsotg->regs + HPRT0);
+ dev_dbg(hsotg->dev, "Clear Resume: HPRT0=%0x\n",
+ readl(hsotg->regs + HPRT0));
+
+ dwc2_hcd_rem_wakeup(hsotg);
+
+ /* Change to L0 state */
+ hsotg->lx_state = DWC2_L0;
+}
+
+static int dwc2_host_is_b_hnp_enabled(struct dwc2_hsotg *hsotg)
+{
+ struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
+
+ return hcd->self.b_hnp_enable;
+}
+
+/* Must NOT be called with interrupt disabled or spinlock held */
+static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
+{
+ unsigned long flags;
+ u32 hprt0;
+ u32 pcgctl;
+ u32 gotgctl;
+
+ dev_dbg(hsotg->dev, "%s()\n", __func__);
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ if (windex == hsotg->otg_port && dwc2_host_is_b_hnp_enabled(hsotg)) {
+ gotgctl = readl(hsotg->regs + GOTGCTL);
+ gotgctl |= GOTGCTL_HSTSETHNPEN;
+ writel(gotgctl, hsotg->regs + GOTGCTL);
+ hsotg->op_state = OTG_STATE_A_SUSPEND;
+ }
+
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 |= HPRT0_SUSP;
+ writel(hprt0, hsotg->regs + HPRT0);
+
+ /* Update lx_state */
+ hsotg->lx_state = DWC2_L2;
+
+ /* Suspend the Phy Clock */
+ pcgctl = readl(hsotg->regs + PCGCTL);
+ pcgctl |= PCGCTL_STOPPCLK;
+ writel(pcgctl, hsotg->regs + PCGCTL);
+ udelay(10);
+
+ /* For HNP the bus must be suspended for at least 200ms */
+ if (dwc2_host_is_b_hnp_enabled(hsotg)) {
+ pcgctl = readl(hsotg->regs + PCGCTL);
+ pcgctl &= ~PCGCTL_STOPPCLK;
+ writel(pcgctl, hsotg->regs + PCGCTL);
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+
+ usleep_range(200000, 250000);
+ } else {
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ }
+}
+
+/* Handles hub class-specific requests */
+static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
+ u16 wvalue, u16 windex, char *buf, u16 wlength)
+{
+ struct usb_hub_descriptor *hub_desc;
+ int retval = 0;
+ u32 hprt0;
+ u32 port_status;
+ u32 speed;
+ u32 pcgctl;
+
+ switch (typereq) {
+ case ClearHubFeature:
+ dev_dbg(hsotg->dev, "ClearHubFeature %1xh\n", wvalue);
+
+ switch (wvalue) {
+ case C_HUB_LOCAL_POWER:
+ case C_HUB_OVER_CURRENT:
+ /* Nothing required here */
+ break;
+
+ default:
+ retval = -EINVAL;
+ dev_err(hsotg->dev,
+ "ClearHubFeature request %1xh unknown\n",
+ wvalue);
+ }
+ break;
+
+ case ClearPortFeature:
+ if (wvalue != USB_PORT_FEAT_L1)
+ if (!windex || windex > 1)
+ goto error;
+ switch (wvalue) {
+ case USB_PORT_FEAT_ENABLE:
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_ENABLE\n");
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 |= HPRT0_ENA;
+ writel(hprt0, hsotg->regs + HPRT0);
+ break;
+
+ case USB_PORT_FEAT_SUSPEND:
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_SUSPEND\n");
+ writel(0, hsotg->regs + PCGCTL);
+ usleep_range(20000, 40000);
+
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 |= HPRT0_RES;
+ writel(hprt0, hsotg->regs + HPRT0);
+ hprt0 &= ~HPRT0_SUSP;
+ usleep_range(100000, 150000);
+
+ hprt0 &= ~HPRT0_RES;
+ writel(hprt0, hsotg->regs + HPRT0);
+ break;
+
+ case USB_PORT_FEAT_POWER:
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_POWER\n");
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 &= ~HPRT0_PWR;
+ writel(hprt0, hsotg->regs + HPRT0);
+ break;
+
+ case USB_PORT_FEAT_INDICATOR:
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_INDICATOR\n");
+ /* Port indicator not supported */
+ break;
+
+ case USB_PORT_FEAT_C_CONNECTION:
+ /*
+ * Clears driver's internal Connect Status Change flag
+ */
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_C_CONNECTION\n");
+ hsotg->flags.b.port_connect_status_change = 0;
+ break;
+
+ case USB_PORT_FEAT_C_RESET:
+ /* Clears driver's internal Port Reset Change flag */
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_C_RESET\n");
+ hsotg->flags.b.port_reset_change = 0;
+ break;
+
+ case USB_PORT_FEAT_C_ENABLE:
+ /*
+ * Clears the driver's internal Port Enable/Disable
+ * Change flag
+ */
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_C_ENABLE\n");
+ hsotg->flags.b.port_enable_change = 0;
+ break;
+
+ case USB_PORT_FEAT_C_SUSPEND:
+ /*
+ * Clears the driver's internal Port Suspend Change
+ * flag, which is set when resume signaling on the host
+ * port is complete
+ */
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_C_SUSPEND\n");
+ hsotg->flags.b.port_suspend_change = 0;
+ break;
+
+ case USB_PORT_FEAT_C_PORT_L1:
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_C_PORT_L1\n");
+ hsotg->flags.b.port_l1_change = 0;
+ break;
+
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ dev_dbg(hsotg->dev,
+ "ClearPortFeature USB_PORT_FEAT_C_OVER_CURRENT\n");
+ hsotg->flags.b.port_over_current_change = 0;
+ break;
+
+ default:
+ retval = -EINVAL;
+ dev_err(hsotg->dev,
+ "ClearPortFeature request %1xh unknown or unsupported\n",
+ wvalue);
+ }
+ break;
+
+ case GetHubDescriptor:
+ dev_dbg(hsotg->dev, "GetHubDescriptor\n");
+ hub_desc = (struct usb_hub_descriptor *)buf;
+ hub_desc->bDescLength = 9;
+ hub_desc->bDescriptorType = 0x29;
+ hub_desc->bNbrPorts = 1;
+ hub_desc->wHubCharacteristics = cpu_to_le16(0x08);
+ hub_desc->bPwrOn2PwrGood = 1;
+ hub_desc->bHubContrCurrent = 0;
+ hub_desc->u.hs.DeviceRemovable[0] = 0;
+ hub_desc->u.hs.DeviceRemovable[1] = 0xff;
+ break;
+
+ case GetHubStatus:
+ dev_dbg(hsotg->dev, "GetHubStatus\n");
+ memset(buf, 0, 4);
+ break;
+
+ case GetPortStatus:
+ dev_vdbg(hsotg->dev,
+ "GetPortStatus wIndex=0x%04x flags=0x%08x\n", windex,
+ hsotg->flags.d32);
+ if (!windex || windex > 1)
+ goto error;
+
+ port_status = 0;
+ if (hsotg->flags.b.port_connect_status_change)
+ port_status |= USB_PORT_STAT_C_CONNECTION << 16;
+ if (hsotg->flags.b.port_enable_change)
+ port_status |= USB_PORT_STAT_C_ENABLE << 16;
+ if (hsotg->flags.b.port_suspend_change)
+ port_status |= USB_PORT_STAT_C_SUSPEND << 16;
+ if (hsotg->flags.b.port_l1_change)
+ port_status |= USB_PORT_STAT_C_L1 << 16;
+ if (hsotg->flags.b.port_reset_change)
+ port_status |= USB_PORT_STAT_C_RESET << 16;
+ if (hsotg->flags.b.port_over_current_change) {
+ dev_warn(hsotg->dev, "Overcurrent change detected\n");
+ port_status |= USB_PORT_STAT_C_OVERCURRENT << 16;
+ }
+
+ if (!hsotg->flags.b.port_connect_status) {
+ /*
+ * The port is disconnected, which means the core is
+ * either in device mode or it soon will be. Just
+ * return 0's for the remainder of the port status
+ * since the port register can't be read if the core
+ * is in device mode.
+ */
+ *(__le32 *)buf = cpu_to_le32(port_status);
+ break;
+ }
+
+ hprt0 = readl(hsotg->regs + HPRT0);
+ dev_vdbg(hsotg->dev, " HPRT0: 0x%08x\n", hprt0);
+
+ if (hprt0 & HPRT0_CONNSTS)
+ port_status |= USB_PORT_STAT_CONNECTION;
+ if (hprt0 & HPRT0_ENA)
+ port_status |= USB_PORT_STAT_ENABLE;
+ if (hprt0 & HPRT0_SUSP)
+ port_status |= USB_PORT_STAT_SUSPEND;
+ if (hprt0 & HPRT0_OVRCURRACT)
+ port_status |= USB_PORT_STAT_OVERCURRENT;
+ if (hprt0 & HPRT0_RST)
+ port_status |= USB_PORT_STAT_RESET;
+ if (hprt0 & HPRT0_PWR)
+ port_status |= USB_PORT_STAT_POWER;
+
+ speed = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
+ if (speed == HPRT0_SPD_HIGH_SPEED)
+ port_status |= USB_PORT_STAT_HIGH_SPEED;
+ else if (speed == HPRT0_SPD_LOW_SPEED)
+ port_status |= USB_PORT_STAT_LOW_SPEED;
+
+ if (hprt0 & HPRT0_TSTCTL_MASK)
+ port_status |= USB_PORT_STAT_TEST;
+ /* USB_PORT_FEAT_INDICATOR unsupported always 0 */
+
+ dev_vdbg(hsotg->dev, "port_status=%08x\n", port_status);
+ *(__le32 *)buf = cpu_to_le32(port_status);
+ break;
+
+ case SetHubFeature:
+ dev_dbg(hsotg->dev, "SetHubFeature\n");
+ /* No HUB features supported */
+ break;
+
+ case SetPortFeature:
+ dev_dbg(hsotg->dev, "SetPortFeature\n");
+ if (wvalue != USB_PORT_FEAT_TEST && (!windex || windex > 1))
+ goto error;
+
+ if (!hsotg->flags.b.port_connect_status) {
+ /*
+ * The port is disconnected, which means the core is
+ * either in device mode or it soon will be. Just
+ * return without doing anything since the port
+ * register can't be written if the core is in device
+ * mode.
+ */
+ break;
+ }
+
+ switch (wvalue) {
+ case USB_PORT_FEAT_SUSPEND:
+ dev_dbg(hsotg->dev,
+ "SetPortFeature - USB_PORT_FEAT_SUSPEND\n");
+ if (windex != hsotg->otg_port)
+ goto error;
+ dwc2_port_suspend(hsotg, windex);
+ break;
+
+ case USB_PORT_FEAT_POWER:
+ dev_dbg(hsotg->dev,
+ "SetPortFeature - USB_PORT_FEAT_POWER\n");
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 |= HPRT0_PWR;
+ writel(hprt0, hsotg->regs + HPRT0);
+ break;
+
+ case USB_PORT_FEAT_RESET:
+ hprt0 = dwc2_read_hprt0(hsotg);
+ dev_dbg(hsotg->dev,
+ "SetPortFeature - USB_PORT_FEAT_RESET\n");
+ pcgctl = readl(hsotg->regs + PCGCTL);
+ pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK);
+ writel(pcgctl, hsotg->regs + PCGCTL);
+ /* ??? Original driver does this */
+ writel(0, hsotg->regs + PCGCTL);
+
+ hprt0 = dwc2_read_hprt0(hsotg);
+ /* Clear suspend bit if resetting from suspend state */
+ hprt0 &= ~HPRT0_SUSP;
+
+ /*
+ * When B-Host the Port reset bit is set in the Start
+ * HCD Callback function, so that the reset is started
+ * within 1ms of the HNP success interrupt
+ */
+ if (!dwc2_hcd_is_b_host(hsotg)) {
+ hprt0 |= HPRT0_PWR | HPRT0_RST;
+ dev_dbg(hsotg->dev,
+ "In host mode, hprt0=%08x\n", hprt0);
+ writel(hprt0, hsotg->regs + HPRT0);
+ }
+
+ /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
+ usleep_range(50000, 70000);
+ hprt0 &= ~HPRT0_RST;
+ writel(hprt0, hsotg->regs + HPRT0);
+ hsotg->lx_state = DWC2_L0; /* Now back to On state */
+ break;
+
+ case USB_PORT_FEAT_INDICATOR:
+ dev_dbg(hsotg->dev,
+ "SetPortFeature - USB_PORT_FEAT_INDICATOR\n");
+ /* Not supported */
+ break;
+
+ default:
+ retval = -EINVAL;
+ dev_err(hsotg->dev,
+ "SetPortFeature %1xh unknown or unsupported\n",
+ wvalue);
+ break;
+ }
+ break;
+
+ default:
+error:
+ retval = -EINVAL;
+ dev_dbg(hsotg->dev,
+ "Unknown hub control request: %1xh wIndex: %1xh wValue: %1xh\n",
+ typereq, windex, wvalue);
+ break;
+ }
+
+ return retval;
+}
+
+static int dwc2_hcd_is_status_changed(struct dwc2_hsotg *hsotg, int port)
+{
+ int retval;
+
+ if (port != 1)
+ return -EINVAL;
+
+ retval = (hsotg->flags.b.port_connect_status_change ||
+ hsotg->flags.b.port_reset_change ||
+ hsotg->flags.b.port_enable_change ||
+ hsotg->flags.b.port_suspend_change ||
+ hsotg->flags.b.port_over_current_change);
+
+ if (retval) {
+ dev_dbg(hsotg->dev,
+ "DWC OTG HCD HUB STATUS DATA: Root port status changed\n");
+ dev_dbg(hsotg->dev, " port_connect_status_change: %d\n",
+ hsotg->flags.b.port_connect_status_change);
+ dev_dbg(hsotg->dev, " port_reset_change: %d\n",
+ hsotg->flags.b.port_reset_change);
+ dev_dbg(hsotg->dev, " port_enable_change: %d\n",
+ hsotg->flags.b.port_enable_change);
+ dev_dbg(hsotg->dev, " port_suspend_change: %d\n",
+ hsotg->flags.b.port_suspend_change);
+ dev_dbg(hsotg->dev, " port_over_current_change: %d\n",
+ hsotg->flags.b.port_over_current_change);
+ }
+
+ return retval;
+}
+
+int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg)
+{
+ u32 hfnum = readl(hsotg->regs + HFNUM);
+
+#ifdef DWC2_DEBUG_SOF
+ dev_vdbg(hsotg->dev, "DWC OTG HCD GET FRAME NUMBER %d\n",
+ (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT);
+#endif
+ return (hfnum & HFNUM_FRNUM_MASK) >> HFNUM_FRNUM_SHIFT;
+}
+
+int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg)
+{
+ return hsotg->op_state == OTG_STATE_B_HOST;
+}
+
+static struct dwc2_hcd_urb *dwc2_hcd_urb_alloc(struct dwc2_hsotg *hsotg,
+ int iso_desc_count,
+ gfp_t mem_flags)
+{
+ struct dwc2_hcd_urb *urb;
+ u32 size = sizeof(*urb) + iso_desc_count *
+ sizeof(struct dwc2_hcd_iso_packet_desc);
+
+ urb = kzalloc(size, mem_flags);
+ if (urb)
+ urb->packet_count = iso_desc_count;
+ return urb;
+}
+
+static void dwc2_hcd_urb_set_pipeinfo(struct dwc2_hsotg *hsotg,
+ struct dwc2_hcd_urb *urb, u8 dev_addr,
+ u8 ep_num, u8 ep_type, u8 ep_dir, u16 mps)
+{
+ if (dbg_perio() ||
+ ep_type == USB_ENDPOINT_XFER_BULK ||
+ ep_type == USB_ENDPOINT_XFER_CONTROL)
+ dev_vdbg(hsotg->dev,
+ "addr=%d, ep_num=%d, ep_dir=%1x, ep_type=%1x, mps=%d\n",
+ dev_addr, ep_num, ep_dir, ep_type, mps);
+ urb->pipe_info.dev_addr = dev_addr;
+ urb->pipe_info.ep_num = ep_num;
+ urb->pipe_info.pipe_type = ep_type;
+ urb->pipe_info.pipe_dir = ep_dir;
+ urb->pipe_info.mps = mps;
+}
+
+/*
+ * NOTE: This function will be removed once the peripheral controller code
+ * is integrated and the driver is stable
+ */
+void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg)
+{
+#ifdef DEBUG
+ struct dwc2_host_chan *chan;
+ struct dwc2_hcd_urb *urb;
+ struct dwc2_qtd *qtd;
+ int num_channels;
+ u32 np_tx_status;
+ u32 p_tx_status;
+ int i;
+
+ num_channels = hsotg->core_params->host_channels;
+ dev_dbg(hsotg->dev, "\n");
+ dev_dbg(hsotg->dev,
+ "************************************************************\n");
+ dev_dbg(hsotg->dev, "HCD State:\n");
+ dev_dbg(hsotg->dev, " Num channels: %d\n", num_channels);
+
+ for (i = 0; i < num_channels; i++) {
+ chan = hsotg->hc_ptr_array[i];
+ dev_dbg(hsotg->dev, " Channel %d:\n", i);
+ dev_dbg(hsotg->dev,
+ " dev_addr: %d, ep_num: %d, ep_is_in: %d\n",
+ chan->dev_addr, chan->ep_num, chan->ep_is_in);
+ dev_dbg(hsotg->dev, " speed: %d\n", chan->speed);
+ dev_dbg(hsotg->dev, " ep_type: %d\n", chan->ep_type);
+ dev_dbg(hsotg->dev, " max_packet: %d\n", chan->max_packet);
+ dev_dbg(hsotg->dev, " data_pid_start: %d\n",
+ chan->data_pid_start);
+ dev_dbg(hsotg->dev, " multi_count: %d\n", chan->multi_count);
+ dev_dbg(hsotg->dev, " xfer_started: %d\n",
+ chan->xfer_started);
+ dev_dbg(hsotg->dev, " xfer_buf: %p\n", chan->xfer_buf);
+ dev_dbg(hsotg->dev, " xfer_dma: %08lx\n",
+ (unsigned long)chan->xfer_dma);
+ dev_dbg(hsotg->dev, " xfer_len: %d\n", chan->xfer_len);
+ dev_dbg(hsotg->dev, " xfer_count: %d\n", chan->xfer_count);
+ dev_dbg(hsotg->dev, " halt_on_queue: %d\n",
+ chan->halt_on_queue);
+ dev_dbg(hsotg->dev, " halt_pending: %d\n",
+ chan->halt_pending);
+ dev_dbg(hsotg->dev, " halt_status: %d\n", chan->halt_status);
+ dev_dbg(hsotg->dev, " do_split: %d\n", chan->do_split);
+ dev_dbg(hsotg->dev, " complete_split: %d\n",
+ chan->complete_split);
+ dev_dbg(hsotg->dev, " hub_addr: %d\n", chan->hub_addr);
+ dev_dbg(hsotg->dev, " hub_port: %d\n", chan->hub_port);
+ dev_dbg(hsotg->dev, " xact_pos: %d\n", chan->xact_pos);
+ dev_dbg(hsotg->dev, " requests: %d\n", chan->requests);
+ dev_dbg(hsotg->dev, " qh: %p\n", chan->qh);
+
+ if (chan->xfer_started) {
+ u32 hfnum, hcchar, hctsiz, hcint, hcintmsk;
+
+ hfnum = readl(hsotg->regs + HFNUM);
+ hcchar = readl(hsotg->regs + HCCHAR(i));
+ hctsiz = readl(hsotg->regs + HCTSIZ(i));
+ hcint = readl(hsotg->regs + HCINT(i));
+ hcintmsk = readl(hsotg->regs + HCINTMSK(i));
+ dev_dbg(hsotg->dev, " hfnum: 0x%08x\n", hfnum);
+ dev_dbg(hsotg->dev, " hcchar: 0x%08x\n", hcchar);
+ dev_dbg(hsotg->dev, " hctsiz: 0x%08x\n", hctsiz);
+ dev_dbg(hsotg->dev, " hcint: 0x%08x\n", hcint);
+ dev_dbg(hsotg->dev, " hcintmsk: 0x%08x\n", hcintmsk);
+ }
+
+ if (!(chan->xfer_started && chan->qh))
+ continue;
+
+ list_for_each_entry(qtd, &chan->qh->qtd_list, qtd_list_entry) {
+ if (!qtd->in_process)
+ break;
+ urb = qtd->urb;
+ dev_dbg(hsotg->dev, " URB Info:\n");
+ dev_dbg(hsotg->dev, " qtd: %p, urb: %p\n",
+ qtd, urb);
+ if (urb) {
+ dev_dbg(hsotg->dev,
+ " Dev: %d, EP: %d %s\n",
+ dwc2_hcd_get_dev_addr(&urb->pipe_info),
+ dwc2_hcd_get_ep_num(&urb->pipe_info),
+ dwc2_hcd_is_pipe_in(&urb->pipe_info) ?
+ "IN" : "OUT");
+ dev_dbg(hsotg->dev,
+ " Max packet size: %d\n",
+ dwc2_hcd_get_mps(&urb->pipe_info));
+ dev_dbg(hsotg->dev,
+ " transfer_buffer: %p\n",
+ urb->buf);
+ dev_dbg(hsotg->dev,
+ " transfer_dma: %08lx\n",
+ (unsigned long)urb->dma);
+ dev_dbg(hsotg->dev,
+ " transfer_buffer_length: %d\n",
+ urb->length);
+ dev_dbg(hsotg->dev, " actual_length: %d\n",
+ urb->actual_length);
+ }
+ }
+ }
+
+ dev_dbg(hsotg->dev, " non_periodic_channels: %d\n",
+ hsotg->non_periodic_channels);
+ dev_dbg(hsotg->dev, " periodic_channels: %d\n",
+ hsotg->periodic_channels);
+ dev_dbg(hsotg->dev, " periodic_usecs: %d\n", hsotg->periodic_usecs);
+ np_tx_status = readl(hsotg->regs + GNPTXSTS);
+ dev_dbg(hsotg->dev, " NP Tx Req Queue Space Avail: %d\n",
+ (np_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT);
+ dev_dbg(hsotg->dev, " NP Tx FIFO Space Avail: %d\n",
+ (np_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT);
+ p_tx_status = readl(hsotg->regs + HPTXSTS);
+ dev_dbg(hsotg->dev, " P Tx Req Queue Space Avail: %d\n",
+ (p_tx_status & TXSTS_QSPCAVAIL_MASK) >> TXSTS_QSPCAVAIL_SHIFT);
+ dev_dbg(hsotg->dev, " P Tx FIFO Space Avail: %d\n",
+ (p_tx_status & TXSTS_FSPCAVAIL_MASK) >> TXSTS_FSPCAVAIL_SHIFT);
+ dwc2_hcd_dump_frrem(hsotg);
+ dwc2_dump_global_registers(hsotg);
+ dwc2_dump_host_registers(hsotg);
+ dev_dbg(hsotg->dev,
+ "************************************************************\n");
+ dev_dbg(hsotg->dev, "\n");
+#endif
+}
+
+/*
+ * NOTE: This function will be removed once the peripheral controller code
+ * is integrated and the driver is stable
+ */
+void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg)
+{
+#ifdef DWC2_DUMP_FRREM
+ dev_dbg(hsotg->dev, "Frame remaining at SOF:\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->frrem_samples, hsotg->frrem_accum,
+ hsotg->frrem_samples > 0 ?
+ hsotg->frrem_accum / hsotg->frrem_samples : 0);
+ dev_dbg(hsotg->dev, "\n");
+ dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 7):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_7_samples,
+ hsotg->hfnum_7_frrem_accum,
+ hsotg->hfnum_7_samples > 0 ?
+ hsotg->hfnum_7_frrem_accum / hsotg->hfnum_7_samples : 0);
+ dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 0):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_0_samples,
+ hsotg->hfnum_0_frrem_accum,
+ hsotg->hfnum_0_samples > 0 ?
+ hsotg->hfnum_0_frrem_accum / hsotg->hfnum_0_samples : 0);
+ dev_dbg(hsotg->dev, "Frame remaining at start_transfer (uframe 1-6):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_other_samples,
+ hsotg->hfnum_other_frrem_accum,
+ hsotg->hfnum_other_samples > 0 ?
+ hsotg->hfnum_other_frrem_accum / hsotg->hfnum_other_samples :
+ 0);
+ dev_dbg(hsotg->dev, "\n");
+ dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 7):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_7_samples_a, hsotg->hfnum_7_frrem_accum_a,
+ hsotg->hfnum_7_samples_a > 0 ?
+ hsotg->hfnum_7_frrem_accum_a / hsotg->hfnum_7_samples_a : 0);
+ dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 0):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_0_samples_a, hsotg->hfnum_0_frrem_accum_a,
+ hsotg->hfnum_0_samples_a > 0 ?
+ hsotg->hfnum_0_frrem_accum_a / hsotg->hfnum_0_samples_a : 0);
+ dev_dbg(hsotg->dev, "Frame remaining at sample point A (uframe 1-6):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_other_samples_a, hsotg->hfnum_other_frrem_accum_a,
+ hsotg->hfnum_other_samples_a > 0 ?
+ hsotg->hfnum_other_frrem_accum_a / hsotg->hfnum_other_samples_a
+ : 0);
+ dev_dbg(hsotg->dev, "\n");
+ dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 7):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_7_samples_b, hsotg->hfnum_7_frrem_accum_b,
+ hsotg->hfnum_7_samples_b > 0 ?
+ hsotg->hfnum_7_frrem_accum_b / hsotg->hfnum_7_samples_b : 0);
+ dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 0):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_0_samples_b, hsotg->hfnum_0_frrem_accum_b,
+ (hsotg->hfnum_0_samples_b > 0) ?
+ hsotg->hfnum_0_frrem_accum_b / hsotg->hfnum_0_samples_b : 0);
+ dev_dbg(hsotg->dev, "Frame remaining at sample point B (uframe 1-6):\n");
+ dev_dbg(hsotg->dev, " samples %u, accum %llu, avg %llu\n",
+ hsotg->hfnum_other_samples_b, hsotg->hfnum_other_frrem_accum_b,
+ (hsotg->hfnum_other_samples_b > 0) ?
+ hsotg->hfnum_other_frrem_accum_b / hsotg->hfnum_other_samples_b
+ : 0);
+#endif
+}
+
+struct wrapper_priv_data {
+ struct dwc2_hsotg *hsotg;
+};
+
+/* Gets the dwc2_hsotg from a usb_hcd */
+static struct dwc2_hsotg *dwc2_hcd_to_hsotg(struct usb_hcd *hcd)
+{
+ struct wrapper_priv_data *p;
+
+ p = (struct wrapper_priv_data *) &hcd->hcd_priv;
+ return p->hsotg;
+}
+
+static int _dwc2_hcd_start(struct usb_hcd *hcd);
+
+void dwc2_host_start(struct dwc2_hsotg *hsotg)
+{
+ struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
+
+ hcd->self.is_b_host = dwc2_hcd_is_b_host(hsotg);
+ _dwc2_hcd_start(hcd);
+}
+
+void dwc2_host_disconnect(struct dwc2_hsotg *hsotg)
+{
+ struct usb_hcd *hcd = dwc2_hsotg_to_hcd(hsotg);
+
+ hcd->self.is_b_host = 0;
+}
+
+void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context, int *hub_addr,
+ int *hub_port)
+{
+ struct urb *urb = context;
+
+ if (urb->dev->tt)
+ *hub_addr = urb->dev->tt->hub->devnum;
+ else
+ *hub_addr = 0;
+ *hub_port = urb->dev->ttport;
+}
+
+int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context)
+{
+ struct urb *urb = context;
+
+ return urb->dev->speed;
+}
+
+static void dwc2_allocate_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
+ struct urb *urb)
+{
+ struct usb_bus *bus = hcd_to_bus(hcd);
+
+ if (urb->interval)
+ bus->bandwidth_allocated += bw / urb->interval;
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
+ bus->bandwidth_isoc_reqs++;
+ else
+ bus->bandwidth_int_reqs++;
+}
+
+static void dwc2_free_bus_bandwidth(struct usb_hcd *hcd, u16 bw,
+ struct urb *urb)
+{
+ struct usb_bus *bus = hcd_to_bus(hcd);
+
+ if (urb->interval)
+ bus->bandwidth_allocated -= bw / urb->interval;
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
+ bus->bandwidth_isoc_reqs--;
+ else
+ bus->bandwidth_int_reqs--;
+}
+
+/*
+ * Sets the final status of an URB and returns it to the upper layer. Any
+ * required cleanup of the URB is performed.
+ *
+ * Must be called with interrupt disabled and spinlock held
+ */
+void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
+ int status)
+{
+ struct urb *urb;
+ int i;
+
+ if (!qtd) {
+ dev_dbg(hsotg->dev, "## %s: qtd is NULL ##\n", __func__);
+ return;
+ }
+
+ if (!qtd->urb) {
+ dev_dbg(hsotg->dev, "## %s: qtd->urb is NULL ##\n", __func__);
+ return;
+ }
+
+ urb = qtd->urb->priv;
+ if (!urb) {
+ dev_dbg(hsotg->dev, "## %s: urb->priv is NULL ##\n", __func__);
+ return;
+ }
+
+ urb->actual_length = dwc2_hcd_urb_get_actual_length(qtd->urb);
+
+ if (dbg_urb(urb))
+ dev_vdbg(hsotg->dev,
+ "%s: urb %p device %d ep %d-%s status %d actual %d\n",
+ __func__, urb, usb_pipedevice(urb->pipe),
+ usb_pipeendpoint(urb->pipe),
+ usb_pipein(urb->pipe) ? "IN" : "OUT", status,
+ urb->actual_length);
+
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS && dbg_perio()) {
+ for (i = 0; i < urb->number_of_packets; i++)
+ dev_vdbg(hsotg->dev, " ISO Desc %d status %d\n",
+ i, urb->iso_frame_desc[i].status);
+ }
+
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ urb->error_count = dwc2_hcd_urb_get_error_count(qtd->urb);
+ for (i = 0; i < urb->number_of_packets; ++i) {
+ urb->iso_frame_desc[i].actual_length =
+ dwc2_hcd_urb_get_iso_desc_actual_length(
+ qtd->urb, i);
+ urb->iso_frame_desc[i].status =
+ dwc2_hcd_urb_get_iso_desc_status(qtd->urb, i);
+ }
+ }
+
+ urb->status = status;
+ if (!status) {
+ if ((urb->transfer_flags & URB_SHORT_NOT_OK) &&
+ urb->actual_length < urb->transfer_buffer_length)
+ urb->status = -EREMOTEIO;
+ }
+
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
+ usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
+ struct usb_host_endpoint *ep = urb->ep;
+
+ if (ep)
+ dwc2_free_bus_bandwidth(dwc2_hsotg_to_hcd(hsotg),
+ dwc2_hcd_get_ep_bandwidth(hsotg, ep),
+ urb);
+ }
+
+ usb_hcd_unlink_urb_from_ep(dwc2_hsotg_to_hcd(hsotg), urb);
+ urb->hcpriv = NULL;
+ kfree(qtd->urb);
+ qtd->urb = NULL;
+
+ spin_unlock(&hsotg->lock);
+ usb_hcd_giveback_urb(dwc2_hsotg_to_hcd(hsotg), urb, status);
+ spin_lock(&hsotg->lock);
+}
+
+/*
+ * Work queue function for starting the HCD when A-Cable is connected
+ */
+static void dwc2_hcd_start_func(struct work_struct *work)
+{
+ struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
+ start_work.work);
+
+ dev_dbg(hsotg->dev, "%s() %p\n", __func__, hsotg);
+ dwc2_host_start(hsotg);
+}
+
+/*
+ * Reset work queue function
+ */
+static void dwc2_hcd_reset_func(struct work_struct *work)
+{
+ struct dwc2_hsotg *hsotg = container_of(work, struct dwc2_hsotg,
+ reset_work.work);
+ u32 hprt0;
+
+ dev_dbg(hsotg->dev, "USB RESET function called\n");
+ hprt0 = dwc2_read_hprt0(hsotg);
+ hprt0 &= ~HPRT0_RST;
+ writel(hprt0, hsotg->regs + HPRT0);
+ hsotg->flags.b.port_reset_change = 1;
+}
+
+/*
+ * =========================================================================
+ * Linux HC Driver Functions
+ * =========================================================================
+ */
+
+/*
+ * Initializes the DWC_otg controller and its root hub and prepares it for host
+ * mode operation. Activates the root port. Returns 0 on success and a negative
+ * error code on failure.
+ */
+static int _dwc2_hcd_start(struct usb_hcd *hcd)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+ struct usb_bus *bus = hcd_to_bus(hcd);
+ unsigned long flags;
+
+ dev_dbg(hsotg->dev, "DWC OTG HCD START\n");
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ hcd->state = HC_STATE_RUNNING;
+
+ if (dwc2_is_device_mode(hsotg)) {
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ return 0; /* why 0 ?? */
+ }
+
+ dwc2_hcd_reinit(hsotg);
+
+ /* Initialize and connect root hub if one is not already attached */
+ if (bus->root_hub) {
+ dev_dbg(hsotg->dev, "DWC OTG HCD Has Root Hub\n");
+ /* Inform the HUB driver to resume */
+ usb_hcd_resume_root_hub(hcd);
+ }
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ return 0;
+}
+
+/*
+ * Halts the DWC_otg host mode operations in a clean manner. USB transfers are
+ * stopped.
+ */
+static void _dwc2_hcd_stop(struct usb_hcd *hcd)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+ unsigned long flags;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+ dwc2_hcd_stop(hsotg);
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+
+ usleep_range(1000, 3000);
+}
+
+/* Returns the current frame number */
+static int _dwc2_hcd_get_frame_number(struct usb_hcd *hcd)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+ return dwc2_hcd_get_frame_number(hsotg);
+}
+
+static void dwc2_dump_urb_info(struct usb_hcd *hcd, struct urb *urb,
+ char *fn_name)
+{
+#ifdef VERBOSE_DEBUG
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+ char *pipetype;
+ char *speed;
+
+ dev_vdbg(hsotg->dev, "%s, urb %p\n", fn_name, urb);
+ dev_vdbg(hsotg->dev, " Device address: %d\n",
+ usb_pipedevice(urb->pipe));
+ dev_vdbg(hsotg->dev, " Endpoint: %d, %s\n",
+ usb_pipeendpoint(urb->pipe),
+ usb_pipein(urb->pipe) ? "IN" : "OUT");
+
+ switch (usb_pipetype(urb->pipe)) {
+ case PIPE_CONTROL:
+ pipetype = "CONTROL";
+ break;
+ case PIPE_BULK:
+ pipetype = "BULK";
+ break;
+ case PIPE_INTERRUPT:
+ pipetype = "INTERRUPT";
+ break;
+ case PIPE_ISOCHRONOUS:
+ pipetype = "ISOCHRONOUS";
+ break;
+ default:
+ pipetype = "UNKNOWN";
+ break;
+ }
+
+ dev_vdbg(hsotg->dev, " Endpoint type: %s %s (%s)\n", pipetype,
+ usb_urb_dir_in(urb) ? "IN" : "OUT", usb_pipein(urb->pipe) ?
+ "IN" : "OUT");
+
+ switch (urb->dev->speed) {
+ case USB_SPEED_HIGH:
+ speed = "HIGH";
+ break;
+ case USB_SPEED_FULL:
+ speed = "FULL";
+ break;
+ case USB_SPEED_LOW:
+ speed = "LOW";
+ break;
+ default:
+ speed = "UNKNOWN";
+ break;
+ }
+
+ dev_vdbg(hsotg->dev, " Speed: %s\n", speed);
+ dev_vdbg(hsotg->dev, " Max packet size: %d\n",
+ usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)));
+ dev_vdbg(hsotg->dev, " Data buffer length: %d\n",
+ urb->transfer_buffer_length);
+ dev_vdbg(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n",
+ urb->transfer_buffer, (unsigned long)urb->transfer_dma);
+ dev_vdbg(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n",
+ urb->setup_packet, (unsigned long)urb->setup_dma);
+ dev_vdbg(hsotg->dev, " Interval: %d\n", urb->interval);
+
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ int i;
+
+ for (i = 0; i < urb->number_of_packets; i++) {
+ dev_vdbg(hsotg->dev, " ISO Desc %d:\n", i);
+ dev_vdbg(hsotg->dev, " offset: %d, length %d\n",
+ urb->iso_frame_desc[i].offset,
+ urb->iso_frame_desc[i].length);
+ }
+ }
+#endif
+}
+
+/*
+ * Starts processing a USB transfer request specified by a USB Request Block
+ * (URB). mem_flags indicates the type of memory allocation to use while
+ * processing this URB.
+ */
+static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
+ gfp_t mem_flags)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+ struct usb_host_endpoint *ep = urb->ep;
+ struct dwc2_hcd_urb *dwc2_urb;
+ int i;
+ int retval;
+ int alloc_bandwidth = 0;
+ u8 ep_type = 0;
+ u32 tflags = 0;
+ void *buf;
+ unsigned long flags;
+
+ if (dbg_urb(urb)) {
+ dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n");
+ dwc2_dump_urb_info(hcd, urb, "urb_enqueue");
+ }
+
+ if (ep == NULL)
+ return -EINVAL;
+
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS ||
+ usb_pipetype(urb->pipe) == PIPE_INTERRUPT) {
+ spin_lock_irqsave(&hsotg->lock, flags);
+ if (!dwc2_hcd_is_bandwidth_allocated(hsotg, ep))
+ alloc_bandwidth = 1;
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ }
+
+ switch (usb_pipetype(urb->pipe)) {
+ case PIPE_CONTROL:
+ ep_type = USB_ENDPOINT_XFER_CONTROL;
+ break;
+ case PIPE_ISOCHRONOUS:
+ ep_type = USB_ENDPOINT_XFER_ISOC;
+ break;
+ case PIPE_BULK:
+ ep_type = USB_ENDPOINT_XFER_BULK;
+ break;
+ case PIPE_INTERRUPT:
+ ep_type = USB_ENDPOINT_XFER_INT;
+ break;
+ default:
+ dev_warn(hsotg->dev, "Wrong ep type\n");
+ }
+
+ dwc2_urb = dwc2_hcd_urb_alloc(hsotg, urb->number_of_packets,
+ mem_flags);
+ if (!dwc2_urb)
+ return -ENOMEM;
+
+ dwc2_hcd_urb_set_pipeinfo(hsotg, dwc2_urb, usb_pipedevice(urb->pipe),
+ usb_pipeendpoint(urb->pipe), ep_type,
+ usb_pipein(urb->pipe),
+ usb_maxpacket(urb->dev, urb->pipe,
+ !(usb_pipein(urb->pipe))));
+
+ buf = urb->transfer_buffer;
+
+ if (hcd->self.uses_dma) {
+ if (!buf && (urb->transfer_dma & 3)) {
+ dev_err(hsotg->dev,
+ "%s: unaligned transfer with no transfer_buffer",
+ __func__);
+ retval = -EINVAL;
+ goto fail1;
+ }
+ }
+
+ if (!(urb->transfer_flags & URB_NO_INTERRUPT))
+ tflags |= URB_GIVEBACK_ASAP;
+ if (urb->transfer_flags & URB_ZERO_PACKET)
+ tflags |= URB_SEND_ZERO_PACKET;
+
+ dwc2_urb->priv = urb;
+ dwc2_urb->buf = buf;
+ dwc2_urb->dma = urb->transfer_dma;
+ dwc2_urb->length = urb->transfer_buffer_length;
+ dwc2_urb->setup_packet = urb->setup_packet;
+ dwc2_urb->setup_dma = urb->setup_dma;
+ dwc2_urb->flags = tflags;
+ dwc2_urb->interval = urb->interval;
+ dwc2_urb->status = -EINPROGRESS;
+
+ for (i = 0; i < urb->number_of_packets; ++i)
+ dwc2_hcd_urb_set_iso_desc_params(dwc2_urb, i,
+ urb->iso_frame_desc[i].offset,
+ urb->iso_frame_desc[i].length);
+
+ urb->hcpriv = dwc2_urb;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+ retval = usb_hcd_link_urb_to_ep(hcd, urb);
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ if (retval)
+ goto fail1;
+
+ retval = dwc2_hcd_urb_enqueue(hsotg, dwc2_urb, &ep->hcpriv, mem_flags);
+ if (retval)
+ goto fail2;
+
+ if (alloc_bandwidth) {
+ spin_lock_irqsave(&hsotg->lock, flags);
+ dwc2_allocate_bus_bandwidth(hcd,
+ dwc2_hcd_get_ep_bandwidth(hsotg, ep),
+ urb);
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ }
+
+ return 0;
+
+fail2:
+ spin_lock_irqsave(&hsotg->lock, flags);
+ dwc2_urb->priv = NULL;
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+fail1:
+ urb->hcpriv = NULL;
+ kfree(dwc2_urb);
+
+ return retval;
+}
+
+/*
+ * Aborts/cancels a USB transfer request. Always returns 0 to indicate success.
+ */
+static int _dwc2_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
+ int status)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+ int rc;
+ unsigned long flags;
+
+ dev_dbg(hsotg->dev, "DWC OTG HCD URB Dequeue\n");
+ dwc2_dump_urb_info(hcd, urb, "urb_dequeue");
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+ if (rc)
+ goto out;
+
+ if (!urb->hcpriv) {
+ dev_dbg(hsotg->dev, "## urb->hcpriv is NULL ##\n");
+ goto out;
+ }
+
+ rc = dwc2_hcd_urb_dequeue(hsotg, urb->hcpriv);
+
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+
+ kfree(urb->hcpriv);
+ urb->hcpriv = NULL;
+
+ /* Higher layer software sets URB status */
+ spin_unlock(&hsotg->lock);
+ usb_hcd_giveback_urb(hcd, urb, status);
+ spin_lock(&hsotg->lock);
+
+ dev_dbg(hsotg->dev, "Called usb_hcd_giveback_urb()\n");
+ dev_dbg(hsotg->dev, " urb->status = %d\n", urb->status);
+out:
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+
+ return rc;
+}
+
+/*
+ * Frees resources in the DWC_otg controller related to a given endpoint. Also
+ * clears state in the HCD related to the endpoint. Any URBs for the endpoint
+ * must already be dequeued.
+ */
+static void _dwc2_hcd_endpoint_disable(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+ dev_dbg(hsotg->dev,
+ "DWC OTG HCD EP DISABLE: bEndpointAddress=0x%02x, ep->hcpriv=%p\n",
+ ep->desc.bEndpointAddress, ep->hcpriv);
+ dwc2_hcd_endpoint_disable(hsotg, ep, 250);
+}
+
+/*
+ * Resets endpoint specific parameter values, in current version used to reset
+ * the data toggle (as a WA). This function can be called from usb_clear_halt
+ * routine.
+ */
+static void _dwc2_hcd_endpoint_reset(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+ int is_control = usb_endpoint_xfer_control(&ep->desc);
+ int is_out = usb_endpoint_dir_out(&ep->desc);
+ int epnum = usb_endpoint_num(&ep->desc);
+ struct usb_device *udev;
+ unsigned long flags;
+
+ dev_dbg(hsotg->dev,
+ "DWC OTG HCD EP RESET: bEndpointAddress=0x%02x\n",
+ ep->desc.bEndpointAddress);
+
+ udev = to_usb_device(hsotg->dev);
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ usb_settoggle(udev, epnum, is_out, 0);
+ if (is_control)
+ usb_settoggle(udev, epnum, !is_out, 0);
+ dwc2_hcd_endpoint_reset(hsotg, ep);
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+}
+
+/*
+ * Handles host mode interrupts for the DWC_otg controller. Returns IRQ_NONE if
+ * there was no interrupt to handle. Returns IRQ_HANDLED if there was a valid
+ * interrupt.
+ *
+ * This function is called by the USB core when an interrupt occurs
+ */
+static irqreturn_t _dwc2_hcd_irq(struct usb_hcd *hcd)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+ return dwc2_handle_hcd_intr(hsotg);
+}
+
+/*
+ * Creates Status Change bitmap for the root hub and root port. The bitmap is
+ * returned in buf. Bit 0 is the status change indicator for the root hub. Bit 1
+ * is the status change indicator for the single root port. Returns 1 if either
+ * change indicator is 1, otherwise returns 0.
+ */
+static int _dwc2_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+
+ buf[0] = dwc2_hcd_is_status_changed(hsotg, 1) << 1;
+ return buf[0] != 0;
+}
+
+/* Handles hub class-specific requests */
+static int _dwc2_hcd_hub_control(struct usb_hcd *hcd, u16 typereq, u16 wvalue,
+ u16 windex, char *buf, u16 wlength)
+{
+ int retval = dwc2_hcd_hub_control(dwc2_hcd_to_hsotg(hcd), typereq,
+ wvalue, windex, buf, wlength);
+ return retval;
+}
+
+/* Handles hub TT buffer clear completions */
+static void _dwc2_hcd_clear_tt_buffer_complete(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep)
+{
+ struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd);
+ struct dwc2_qh *qh;
+ unsigned long flags;
+
+ qh = ep->hcpriv;
+ if (!qh)
+ return;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+ qh->tt_buffer_dirty = 0;
+
+ if (hsotg->flags.b.port_connect_status)
+ dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_ALL);
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+}
+
+static struct hc_driver dwc2_hc_driver = {
+ .description = "dwc2_hsotg",
+ .product_desc = "DWC OTG Controller",
+ .hcd_priv_size = sizeof(struct wrapper_priv_data),
+
+ .irq = _dwc2_hcd_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+
+ .start = _dwc2_hcd_start,
+ .stop = _dwc2_hcd_stop,
+ .urb_enqueue = _dwc2_hcd_urb_enqueue,
+ .urb_dequeue = _dwc2_hcd_urb_dequeue,
+ .endpoint_disable = _dwc2_hcd_endpoint_disable,
+ .endpoint_reset = _dwc2_hcd_endpoint_reset,
+ .get_frame_number = _dwc2_hcd_get_frame_number,
+
+ .hub_status_data = _dwc2_hcd_hub_status_data,
+ .hub_control = _dwc2_hcd_hub_control,
+ .clear_tt_buffer_complete = _dwc2_hcd_clear_tt_buffer_complete,
+};
+
+/*
+ * Frees secondary storage associated with the dwc2_hsotg structure contained
+ * in the struct usb_hcd field
+ */
+static void dwc2_hcd_free(struct dwc2_hsotg *hsotg)
+{
+ u32 ahbcfg;
+ u32 dctl;
+ int i;
+
+ dev_dbg(hsotg->dev, "DWC OTG HCD FREE\n");
+
+ /* Free memory for QH/QTD lists */
+ dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_inactive);
+ dwc2_qh_list_free(hsotg, &hsotg->non_periodic_sched_active);
+ dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_inactive);
+ dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_ready);
+ dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_assigned);
+ dwc2_qh_list_free(hsotg, &hsotg->periodic_sched_queued);
+
+ /* Free memory for the host channels */
+ for (i = 0; i < MAX_EPS_CHANNELS; i++) {
+ struct dwc2_host_chan *chan = hsotg->hc_ptr_array[i];
+
+ if (chan != NULL) {
+ dev_dbg(hsotg->dev, "HCD Free channel #%i, chan=%p\n",
+ i, chan);
+ hsotg->hc_ptr_array[i] = NULL;
+ kfree(chan);
+ }
+ }
+
+ if (hsotg->core_params->dma_enable > 0) {
+ if (hsotg->status_buf) {
+ dma_free_coherent(hsotg->dev, DWC2_HCD_STATUS_BUF_SIZE,
+ hsotg->status_buf,
+ hsotg->status_buf_dma);
+ hsotg->status_buf = NULL;
+ }
+ } else {
+ kfree(hsotg->status_buf);
+ hsotg->status_buf = NULL;
+ }
+
+ ahbcfg = readl(hsotg->regs + GAHBCFG);
+
+ /* Disable all interrupts */
+ ahbcfg &= ~GAHBCFG_GLBL_INTR_EN;
+ writel(ahbcfg, hsotg->regs + GAHBCFG);
+ writel(0, hsotg->regs + GINTMSK);
+
+ if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_3_00a) {
+ dctl = readl(hsotg->regs + DCTL);
+ dctl |= DCTL_SFTDISCON;
+ writel(dctl, hsotg->regs + DCTL);
+ }
+
+ if (hsotg->wq_otg) {
+ if (!cancel_work_sync(&hsotg->wf_otg))
+ flush_workqueue(hsotg->wq_otg);
+ destroy_workqueue(hsotg->wq_otg);
+ }
+
+ kfree(hsotg->core_params);
+ hsotg->core_params = NULL;
+ del_timer(&hsotg->wkp_timer);
+}
+
+static void dwc2_hcd_release(struct dwc2_hsotg *hsotg)
+{
+ /* Turn off all host-specific interrupts */
+ dwc2_disable_host_interrupts(hsotg);
+
+ dwc2_hcd_free(hsotg);
+}
+
+/*
+ * Sets all parameters to the given value.
+ *
+ * Assumes that the dwc2_core_params struct contains only integers.
+ */
+void dwc2_set_all_params(struct dwc2_core_params *params, int value)
+{
+ int *p = (int *)params;
+ size_t size = sizeof(*params) / sizeof(*p);
+ int i;
+
+ for (i = 0; i < size; i++)
+ p[i] = value;
+}
+EXPORT_SYMBOL_GPL(dwc2_set_all_params);
+
+/*
+ * Initializes the HCD. This function allocates memory for and initializes the
+ * static parts of the usb_hcd and dwc2_hsotg structures. It also registers the
+ * USB bus with the core and calls the hc_driver->start() function. It returns
+ * a negative error on failure.
+ */
+int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
+ const struct dwc2_core_params *params)
+{
+ struct usb_hcd *hcd;
+ struct dwc2_host_chan *channel;
+ u32 hcfg;
+ int i, num_channels;
+ int retval;
+
+ dev_dbg(hsotg->dev, "DWC OTG HCD INIT\n");
+
+ /* Detect config values from hardware */
+ retval = dwc2_get_hwparams(hsotg);
+
+ if (retval)
+ return retval;
+
+ retval = -ENOMEM;
+
+ hcfg = readl(hsotg->regs + HCFG);
+ dev_dbg(hsotg->dev, "hcfg=%08x\n", hcfg);
+
+#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
+ hsotg->frame_num_array = kzalloc(sizeof(*hsotg->frame_num_array) *
+ FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
+ if (!hsotg->frame_num_array)
+ goto error1;
+ hsotg->last_frame_num_array = kzalloc(
+ sizeof(*hsotg->last_frame_num_array) *
+ FRAME_NUM_ARRAY_SIZE, GFP_KERNEL);
+ if (!hsotg->last_frame_num_array)
+ goto error1;
+ hsotg->last_frame_num = HFNUM_MAX_FRNUM;
+#endif
+
+ hsotg->core_params = kzalloc(sizeof(*hsotg->core_params), GFP_KERNEL);
+ if (!hsotg->core_params)
+ goto error1;
+
+ dwc2_set_all_params(hsotg->core_params, -1);
+
+ /* Validate parameter values */
+ dwc2_set_parameters(hsotg, params);
+
+ /* Check if the bus driver or platform code has setup a dma_mask */
+ if (hsotg->core_params->dma_enable > 0 &&
+ hsotg->dev->dma_mask == NULL) {
+ dev_warn(hsotg->dev,
+ "dma_mask not set, disabling DMA\n");
+ hsotg->core_params->dma_enable = 0;
+ hsotg->core_params->dma_desc_enable = 0;
+ }
+
+ /* Set device flags indicating whether the HCD supports DMA */
+ if (hsotg->core_params->dma_enable > 0) {
+ if (dma_set_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
+ dev_warn(hsotg->dev, "can't set DMA mask\n");
+ if (dma_set_coherent_mask(hsotg->dev, DMA_BIT_MASK(32)) < 0)
+ dev_warn(hsotg->dev, "can't set coherent DMA mask\n");
+ }
+
+ hcd = usb_create_hcd(&dwc2_hc_driver, hsotg->dev, dev_name(hsotg->dev));
+ if (!hcd)
+ goto error1;
+
+ if (hsotg->core_params->dma_enable <= 0)
+ hcd->self.uses_dma = 0;
+
+ hcd->has_tt = 1;
+
+ spin_lock_init(&hsotg->lock);
+ ((struct wrapper_priv_data *) &hcd->hcd_priv)->hsotg = hsotg;
+ hsotg->priv = hcd;
+
+ /*
+ * Disable the global interrupt until all the interrupt handlers are
+ * installed
+ */
+ dwc2_disable_global_interrupts(hsotg);
+
+ /* Initialize the DWC_otg core, and select the Phy type */
+ retval = dwc2_core_init(hsotg, true, irq);
+ if (retval)
+ goto error2;
+
+ /* Create new workqueue and init work */
+ retval = -ENOMEM;
+ hsotg->wq_otg = create_singlethread_workqueue("dwc2");
+ if (!hsotg->wq_otg) {
+ dev_err(hsotg->dev, "Failed to create workqueue\n");
+ goto error2;
+ }
+ INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change);
+
+ setup_timer(&hsotg->wkp_timer, dwc2_wakeup_detected,
+ (unsigned long)hsotg);
+
+ /* Initialize the non-periodic schedule */
+ INIT_LIST_HEAD(&hsotg->non_periodic_sched_inactive);
+ INIT_LIST_HEAD(&hsotg->non_periodic_sched_active);
+
+ /* Initialize the periodic schedule */
+ INIT_LIST_HEAD(&hsotg->periodic_sched_inactive);
+ INIT_LIST_HEAD(&hsotg->periodic_sched_ready);
+ INIT_LIST_HEAD(&hsotg->periodic_sched_assigned);
+ INIT_LIST_HEAD(&hsotg->periodic_sched_queued);
+
+ /*
+ * Create a host channel descriptor for each host channel implemented
+ * in the controller. Initialize the channel descriptor array.
+ */
+ INIT_LIST_HEAD(&hsotg->free_hc_list);
+ num_channels = hsotg->core_params->host_channels;
+ memset(&hsotg->hc_ptr_array[0], 0, sizeof(hsotg->hc_ptr_array));
+
+ for (i = 0; i < num_channels; i++) {
+ channel = kzalloc(sizeof(*channel), GFP_KERNEL);
+ if (channel == NULL)
+ goto error3;
+ channel->hc_num = i;
+ hsotg->hc_ptr_array[i] = channel;
+ }
+
+ if (hsotg->core_params->uframe_sched > 0)
+ dwc2_hcd_init_usecs(hsotg);
+
+ /* Initialize hsotg start work */
+ INIT_DELAYED_WORK(&hsotg->start_work, dwc2_hcd_start_func);
+
+ /* Initialize port reset work */
+ INIT_DELAYED_WORK(&hsotg->reset_work, dwc2_hcd_reset_func);
+
+ /*
+ * Allocate space for storing data on status transactions. Normally no
+ * data is sent, but this space acts as a bit bucket. This must be
+ * done after usb_add_hcd since that function allocates the DMA buffer
+ * pool.
+ */
+ if (hsotg->core_params->dma_enable > 0)
+ hsotg->status_buf = dma_alloc_coherent(hsotg->dev,
+ DWC2_HCD_STATUS_BUF_SIZE,
+ &hsotg->status_buf_dma, GFP_KERNEL);
+ else
+ hsotg->status_buf = kzalloc(DWC2_HCD_STATUS_BUF_SIZE,
+ GFP_KERNEL);
+
+ if (!hsotg->status_buf)
+ goto error3;
+
+ hsotg->otg_port = 1;
+ hsotg->frame_list = NULL;
+ hsotg->frame_list_dma = 0;
+ hsotg->periodic_qh_count = 0;
+
+ /* Initiate lx_state to L3 disconnected state */
+ hsotg->lx_state = DWC2_L3;
+
+ hcd->self.otg_port = hsotg->otg_port;
+
+ /* Don't support SG list at this point */
+ hcd->self.sg_tablesize = 0;
+
+ /*
+ * Finish generic HCD initialization and start the HCD. This function
+ * allocates the DMA buffer pool, registers the USB bus, requests the
+ * IRQ line, and calls hcd_start method.
+ */
+ retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (retval < 0)
+ goto error3;
+
+ dwc2_hcd_dump_state(hsotg);
+
+ dwc2_enable_global_interrupts(hsotg);
+
+ return 0;
+
+error3:
+ dwc2_hcd_release(hsotg);
+error2:
+ usb_put_hcd(hcd);
+error1:
+ kfree(hsotg->core_params);
+
+#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
+ kfree(hsotg->last_frame_num_array);
+ kfree(hsotg->frame_num_array);
+#endif
+
+ dev_err(hsotg->dev, "%s() FAILED, returning %d\n", __func__, retval);
+ return retval;
+}
+EXPORT_SYMBOL_GPL(dwc2_hcd_init);
+
+/*
+ * Removes the HCD.
+ * Frees memory and resources associated with the HCD and deregisters the bus.
+ */
+void dwc2_hcd_remove(struct dwc2_hsotg *hsotg)
+{
+ struct usb_hcd *hcd;
+
+ dev_dbg(hsotg->dev, "DWC OTG HCD REMOVE\n");
+
+ hcd = dwc2_hsotg_to_hcd(hsotg);
+ dev_dbg(hsotg->dev, "hsotg->hcd = %p\n", hcd);
+
+ if (!hcd) {
+ dev_dbg(hsotg->dev, "%s: dwc2_hsotg_to_hcd(hsotg) NULL!\n",
+ __func__);
+ return;
+ }
+
+ usb_remove_hcd(hcd);
+ hsotg->priv = NULL;
+ dwc2_hcd_release(hsotg);
+ usb_put_hcd(hcd);
+
+#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
+ kfree(hsotg->last_frame_num_array);
+ kfree(hsotg->frame_num_array);
+#endif
+}
+EXPORT_SYMBOL_GPL(dwc2_hcd_remove);
--- /dev/null
+/*
+ * hcd.h - DesignWare HS OTG Controller host-mode declarations
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef __DWC2_HCD_H__
+#define __DWC2_HCD_H__
+
+/*
+ * This file contains the structures, constants, and interfaces for the
+ * Host Contoller Driver (HCD)
+ *
+ * The Host Controller Driver (HCD) is responsible for translating requests
+ * from the USB Driver into the appropriate actions on the DWC_otg controller.
+ * It isolates the USBD from the specifics of the controller by providing an
+ * API to the USBD.
+ */
+
+struct dwc2_qh;
+
+/**
+ * struct dwc2_host_chan - Software host channel descriptor
+ *
+ * @hc_num: Host channel number, used for register address lookup
+ * @dev_addr: Address of the device
+ * @ep_num: Endpoint of the device
+ * @ep_is_in: Endpoint direction
+ * @speed: Device speed. One of the following values:
+ * - USB_SPEED_LOW
+ * - USB_SPEED_FULL
+ * - USB_SPEED_HIGH
+ * @ep_type: Endpoint type. One of the following values:
+ * - USB_ENDPOINT_XFER_CONTROL: 0
+ * - USB_ENDPOINT_XFER_ISOC: 1
+ * - USB_ENDPOINT_XFER_BULK: 2
+ * - USB_ENDPOINT_XFER_INTR: 3
+ * @max_packet: Max packet size in bytes
+ * @data_pid_start: PID for initial transaction.
+ * 0: DATA0
+ * 1: DATA2
+ * 2: DATA1
+ * 3: MDATA (non-Control EP),
+ * SETUP (Control EP)
+ * @multi_count: Number of additional periodic transactions per
+ * (micro)frame
+ * @xfer_buf: Pointer to current transfer buffer position
+ * @xfer_dma: DMA address of xfer_buf
+ * @align_buf: In Buffer DMA mode this will be used if xfer_buf is not
+ * DWORD aligned
+ * @xfer_len: Total number of bytes to transfer
+ * @xfer_count: Number of bytes transferred so far
+ * @start_pkt_count: Packet count at start of transfer
+ * @xfer_started: True if the transfer has been started
+ * @ping: True if a PING request should be issued on this channel
+ * @error_state: True if the error count for this transaction is non-zero
+ * @halt_on_queue: True if this channel should be halted the next time a
+ * request is queued for the channel. This is necessary in
+ * slave mode if no request queue space is available when
+ * an attempt is made to halt the channel.
+ * @halt_pending: True if the host channel has been halted, but the core
+ * is not finished flushing queued requests
+ * @do_split: Enable split for the channel
+ * @complete_split: Enable complete split
+ * @hub_addr: Address of high speed hub for the split
+ * @hub_port: Port of the low/full speed device for the split
+ * @xact_pos: Split transaction position. One of the following values:
+ * - DWC2_HCSPLT_XACTPOS_MID
+ * - DWC2_HCSPLT_XACTPOS_BEGIN
+ * - DWC2_HCSPLT_XACTPOS_END
+ * - DWC2_HCSPLT_XACTPOS_ALL
+ * @requests: Number of requests issued for this channel since it was
+ * assigned to the current transfer (not counting PINGs)
+ * @schinfo: Scheduling micro-frame bitmap
+ * @ntd: Number of transfer descriptors for the transfer
+ * @halt_status: Reason for halting the host channel
+ * @hcint Contents of the HCINT register when the interrupt came
+ * @qh: QH for the transfer being processed by this channel
+ * @hc_list_entry: For linking to list of host channels
+ * @desc_list_addr: Current QH's descriptor list DMA address
+ *
+ * This structure represents the state of a single host channel when acting in
+ * host mode. It contains the data items needed to transfer packets to an
+ * endpoint via a host channel.
+ */
+struct dwc2_host_chan {
+ u8 hc_num;
+
+ unsigned dev_addr:7;
+ unsigned ep_num:4;
+ unsigned ep_is_in:1;
+ unsigned speed:4;
+ unsigned ep_type:2;
+ unsigned max_packet:11;
+ unsigned data_pid_start:2;
+#define DWC2_HC_PID_DATA0 TSIZ_SC_MC_PID_DATA0
+#define DWC2_HC_PID_DATA2 TSIZ_SC_MC_PID_DATA2
+#define DWC2_HC_PID_DATA1 TSIZ_SC_MC_PID_DATA1
+#define DWC2_HC_PID_MDATA TSIZ_SC_MC_PID_MDATA
+#define DWC2_HC_PID_SETUP TSIZ_SC_MC_PID_SETUP
+
+ unsigned multi_count:2;
+
+ u8 *xfer_buf;
+ dma_addr_t xfer_dma;
+ dma_addr_t align_buf;
+ u32 xfer_len;
+ u32 xfer_count;
+ u16 start_pkt_count;
+ u8 xfer_started;
+ u8 do_ping;
+ u8 error_state;
+ u8 halt_on_queue;
+ u8 halt_pending;
+ u8 do_split;
+ u8 complete_split;
+ u8 hub_addr;
+ u8 hub_port;
+ u8 xact_pos;
+#define DWC2_HCSPLT_XACTPOS_MID HCSPLT_XACTPOS_MID
+#define DWC2_HCSPLT_XACTPOS_END HCSPLT_XACTPOS_END
+#define DWC2_HCSPLT_XACTPOS_BEGIN HCSPLT_XACTPOS_BEGIN
+#define DWC2_HCSPLT_XACTPOS_ALL HCSPLT_XACTPOS_ALL
+
+ u8 requests;
+ u8 schinfo;
+ u16 ntd;
+ enum dwc2_halt_status halt_status;
+ u32 hcint;
+ struct dwc2_qh *qh;
+ struct list_head hc_list_entry;
+ dma_addr_t desc_list_addr;
+};
+
+struct dwc2_hcd_pipe_info {
+ u8 dev_addr;
+ u8 ep_num;
+ u8 pipe_type;
+ u8 pipe_dir;
+ u16 mps;
+};
+
+struct dwc2_hcd_iso_packet_desc {
+ u32 offset;
+ u32 length;
+ u32 actual_length;
+ u32 status;
+};
+
+struct dwc2_qtd;
+
+struct dwc2_hcd_urb {
+ void *priv;
+ struct dwc2_qtd *qtd;
+ void *buf;
+ dma_addr_t dma;
+ void *setup_packet;
+ dma_addr_t setup_dma;
+ u32 length;
+ u32 actual_length;
+ u32 status;
+ u32 error_count;
+ u32 packet_count;
+ u32 flags;
+ u16 interval;
+ struct dwc2_hcd_pipe_info pipe_info;
+ struct dwc2_hcd_iso_packet_desc iso_descs[0];
+};
+
+/* Phases for control transfers */
+enum dwc2_control_phase {
+ DWC2_CONTROL_SETUP,
+ DWC2_CONTROL_DATA,
+ DWC2_CONTROL_STATUS,
+};
+
+/* Transaction types */
+enum dwc2_transaction_type {
+ DWC2_TRANSACTION_NONE,
+ DWC2_TRANSACTION_PERIODIC,
+ DWC2_TRANSACTION_NON_PERIODIC,
+ DWC2_TRANSACTION_ALL,
+};
+
+/**
+ * struct dwc2_qh - Software queue head structure
+ *
+ * @ep_type: Endpoint type. One of the following values:
+ * - USB_ENDPOINT_XFER_CONTROL
+ * - USB_ENDPOINT_XFER_BULK
+ * - USB_ENDPOINT_XFER_INT
+ * - USB_ENDPOINT_XFER_ISOC
+ * @ep_is_in: Endpoint direction
+ * @maxp: Value from wMaxPacketSize field of Endpoint Descriptor
+ * @dev_speed: Device speed. One of the following values:
+ * - USB_SPEED_LOW
+ * - USB_SPEED_FULL
+ * - USB_SPEED_HIGH
+ * @data_toggle: Determines the PID of the next data packet for
+ * non-controltransfers. Ignored for control transfers.
+ * One of the following values:
+ * - DWC2_HC_PID_DATA0
+ * - DWC2_HC_PID_DATA1
+ * @ping_state: Ping state
+ * @do_split: Full/low speed endpoint on high-speed hub requires split
+ * @td_first: Index of first activated isochronous transfer descriptor
+ * @td_last: Index of last activated isochronous transfer descriptor
+ * @usecs: Bandwidth in microseconds per (micro)frame
+ * @interval: Interval between transfers in (micro)frames
+ * @sched_frame: (Micro)frame to initialize a periodic transfer.
+ * The transfer executes in the following (micro)frame.
+ * @frame_usecs: Internal variable used by the microframe scheduler
+ * @start_split_frame: (Micro)frame at which last start split was initialized
+ * @ntd: Actual number of transfer descriptors in a list
+ * @dw_align_buf: Used instead of original buffer if its physical address
+ * is not dword-aligned
+ * @dw_align_buf_dma: DMA address for align_buf
+ * @qtd_list: List of QTDs for this QH
+ * @channel: Host channel currently processing transfers for this QH
+ * @qh_list_entry: Entry for QH in either the periodic or non-periodic
+ * schedule
+ * @desc_list: List of transfer descriptors
+ * @desc_list_dma: Physical address of desc_list
+ * @n_bytes: Xfer Bytes array. Each element corresponds to a transfer
+ * descriptor and indicates original XferSize value for the
+ * descriptor
+ * @tt_buffer_dirty True if clear_tt_buffer_complete is pending
+ *
+ * A Queue Head (QH) holds the static characteristics of an endpoint and
+ * maintains a list of transfers (QTDs) for that endpoint. A QH structure may
+ * be entered in either the non-periodic or periodic schedule.
+ */
+struct dwc2_qh {
+ u8 ep_type;
+ u8 ep_is_in;
+ u16 maxp;
+ u8 dev_speed;
+ u8 data_toggle;
+ u8 ping_state;
+ u8 do_split;
+ u8 td_first;
+ u8 td_last;
+ u16 usecs;
+ u16 interval;
+ u16 sched_frame;
+ u16 frame_usecs[8];
+ u16 start_split_frame;
+ u16 ntd;
+ u8 *dw_align_buf;
+ dma_addr_t dw_align_buf_dma;
+ struct list_head qtd_list;
+ struct dwc2_host_chan *channel;
+ struct list_head qh_list_entry;
+ struct dwc2_hcd_dma_desc *desc_list;
+ dma_addr_t desc_list_dma;
+ u32 *n_bytes;
+ unsigned tt_buffer_dirty:1;
+};
+
+/**
+ * struct dwc2_qtd - Software queue transfer descriptor (QTD)
+ *
+ * @control_phase: Current phase for control transfers (Setup, Data, or
+ * Status)
+ * @in_process: Indicates if this QTD is currently processed by HW
+ * @data_toggle: Determines the PID of the next data packet for the
+ * data phase of control transfers. Ignored for other
+ * transfer types. One of the following values:
+ * - DWC2_HC_PID_DATA0
+ * - DWC2_HC_PID_DATA1
+ * @complete_split: Keeps track of the current split type for FS/LS
+ * endpoints on a HS Hub
+ * @isoc_split_pos: Position of the ISOC split in full/low speed
+ * @isoc_frame_index: Index of the next frame descriptor for an isochronous
+ * transfer. A frame descriptor describes the buffer
+ * position and length of the data to be transferred in the
+ * next scheduled (micro)frame of an isochronous transfer.
+ * It also holds status for that transaction. The frame
+ * index starts at 0.
+ * @isoc_split_offset: Position of the ISOC split in the buffer for the
+ * current frame
+ * @ssplit_out_xfer_count: How many bytes transferred during SSPLIT OUT
+ * @error_count: Holds the number of bus errors that have occurred for
+ * a transaction within this transfer
+ * @n_desc: Number of DMA descriptors for this QTD
+ * @isoc_frame_index_last: Last activated frame (packet) index, used in
+ * descriptor DMA mode only
+ * @urb: URB for this transfer
+ * @qh: Queue head for this QTD
+ * @qtd_list_entry: For linking to the QH's list of QTDs
+ *
+ * A Queue Transfer Descriptor (QTD) holds the state of a bulk, control,
+ * interrupt, or isochronous transfer. A single QTD is created for each URB
+ * (of one of these types) submitted to the HCD. The transfer associated with
+ * a QTD may require one or multiple transactions.
+ *
+ * A QTD is linked to a Queue Head, which is entered in either the
+ * non-periodic or periodic schedule for execution. When a QTD is chosen for
+ * execution, some or all of its transactions may be executed. After
+ * execution, the state of the QTD is updated. The QTD may be retired if all
+ * its transactions are complete or if an error occurred. Otherwise, it
+ * remains in the schedule so more transactions can be executed later.
+ */
+struct dwc2_qtd {
+ enum dwc2_control_phase control_phase;
+ u8 in_process;
+ u8 data_toggle;
+ u8 complete_split;
+ u8 isoc_split_pos;
+ u16 isoc_frame_index;
+ u16 isoc_split_offset;
+ u32 ssplit_out_xfer_count;
+ u8 error_count;
+ u8 n_desc;
+ u16 isoc_frame_index_last;
+ struct dwc2_hcd_urb *urb;
+ struct dwc2_qh *qh;
+ struct list_head qtd_list_entry;
+};
+
+#ifdef DEBUG
+struct hc_xfer_info {
+ struct dwc2_hsotg *hsotg;
+ struct dwc2_host_chan *chan;
+};
+#endif
+
+/* Gets the struct usb_hcd that contains a struct dwc2_hsotg */
+static inline struct usb_hcd *dwc2_hsotg_to_hcd(struct dwc2_hsotg *hsotg)
+{
+ return (struct usb_hcd *)hsotg->priv;
+}
+
+/*
+ * Inline used to disable one channel interrupt. Channel interrupts are
+ * disabled when the channel is halted or released by the interrupt handler.
+ * There is no need to handle further interrupts of that type until the
+ * channel is re-assigned. In fact, subsequent handling may cause crashes
+ * because the channel structures are cleaned up when the channel is released.
+ */
+static inline void disable_hc_int(struct dwc2_hsotg *hsotg, int chnum, u32 intr)
+{
+ u32 mask = readl(hsotg->regs + HCINTMSK(chnum));
+
+ mask &= ~intr;
+ writel(mask, hsotg->regs + HCINTMSK(chnum));
+}
+
+/*
+ * Returns the mode of operation, host or device
+ */
+static inline int dwc2_is_host_mode(struct dwc2_hsotg *hsotg)
+{
+ return (readl(hsotg->regs + GINTSTS) & GINTSTS_CURMODE_HOST) != 0;
+}
+static inline int dwc2_is_device_mode(struct dwc2_hsotg *hsotg)
+{
+ return (readl(hsotg->regs + GINTSTS) & GINTSTS_CURMODE_HOST) == 0;
+}
+
+/*
+ * Reads HPRT0 in preparation to modify. It keeps the WC bits 0 so that if they
+ * are read as 1, they won't clear when written back.
+ */
+static inline u32 dwc2_read_hprt0(struct dwc2_hsotg *hsotg)
+{
+ u32 hprt0 = readl(hsotg->regs + HPRT0);
+
+ hprt0 &= ~(HPRT0_ENA | HPRT0_CONNDET | HPRT0_ENACHG | HPRT0_OVRCURRCHG);
+ return hprt0;
+}
+
+static inline u8 dwc2_hcd_get_ep_num(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->ep_num;
+}
+
+static inline u8 dwc2_hcd_get_pipe_type(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->pipe_type;
+}
+
+static inline u16 dwc2_hcd_get_mps(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->mps;
+}
+
+static inline u8 dwc2_hcd_get_dev_addr(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->dev_addr;
+}
+
+static inline u8 dwc2_hcd_is_pipe_isoc(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->pipe_type == USB_ENDPOINT_XFER_ISOC;
+}
+
+static inline u8 dwc2_hcd_is_pipe_int(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->pipe_type == USB_ENDPOINT_XFER_INT;
+}
+
+static inline u8 dwc2_hcd_is_pipe_bulk(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->pipe_type == USB_ENDPOINT_XFER_BULK;
+}
+
+static inline u8 dwc2_hcd_is_pipe_control(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->pipe_type == USB_ENDPOINT_XFER_CONTROL;
+}
+
+static inline u8 dwc2_hcd_is_pipe_in(struct dwc2_hcd_pipe_info *pipe)
+{
+ return pipe->pipe_dir == USB_DIR_IN;
+}
+
+static inline u8 dwc2_hcd_is_pipe_out(struct dwc2_hcd_pipe_info *pipe)
+{
+ return !dwc2_hcd_is_pipe_in(pipe);
+}
+
+extern int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq,
+ const struct dwc2_core_params *params);
+extern void dwc2_hcd_remove(struct dwc2_hsotg *hsotg);
+extern void dwc2_set_parameters(struct dwc2_hsotg *hsotg,
+ const struct dwc2_core_params *params);
+extern void dwc2_set_all_params(struct dwc2_core_params *params, int value);
+extern int dwc2_get_hwparams(struct dwc2_hsotg *hsotg);
+
+/* Transaction Execution Functions */
+extern enum dwc2_transaction_type dwc2_hcd_select_transactions(
+ struct dwc2_hsotg *hsotg);
+extern void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg,
+ enum dwc2_transaction_type tr_type);
+
+/* Schedule Queue Functions */
+/* Implemented in hcd_queue.c */
+extern void dwc2_hcd_init_usecs(struct dwc2_hsotg *hsotg);
+extern void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+extern int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+extern void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+extern void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ int sched_csplit);
+
+extern void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb);
+extern int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
+ struct dwc2_qh **qh, gfp_t mem_flags);
+
+/* Unlinks and frees a QTD */
+static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg,
+ struct dwc2_qtd *qtd,
+ struct dwc2_qh *qh)
+{
+ list_del(&qtd->qtd_list_entry);
+ kfree(qtd);
+}
+
+/* Descriptor DMA support functions */
+extern void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh);
+extern void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ enum dwc2_halt_status halt_status);
+
+extern int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ gfp_t mem_flags);
+extern void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh);
+
+/* Check if QH is non-periodic */
+#define dwc2_qh_is_non_per(_qh_ptr_) \
+ ((_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_BULK || \
+ (_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_CONTROL)
+
+#ifdef CONFIG_USB_DWC2_DEBUG_PERIODIC
+static inline bool dbg_hc(struct dwc2_host_chan *hc) { return true; }
+static inline bool dbg_qh(struct dwc2_qh *qh) { return true; }
+static inline bool dbg_urb(struct urb *urb) { return true; }
+static inline bool dbg_perio(void) { return true; }
+#else /* !CONFIG_USB_DWC2_DEBUG_PERIODIC */
+static inline bool dbg_hc(struct dwc2_host_chan *hc)
+{
+ return hc->ep_type == USB_ENDPOINT_XFER_BULK ||
+ hc->ep_type == USB_ENDPOINT_XFER_CONTROL;
+}
+
+static inline bool dbg_qh(struct dwc2_qh *qh)
+{
+ return qh->ep_type == USB_ENDPOINT_XFER_BULK ||
+ qh->ep_type == USB_ENDPOINT_XFER_CONTROL;
+}
+
+static inline bool dbg_urb(struct urb *urb)
+{
+ return usb_pipetype(urb->pipe) == PIPE_BULK ||
+ usb_pipetype(urb->pipe) == PIPE_CONTROL;
+}
+
+static inline bool dbg_perio(void) { return false; }
+#endif
+
+/* High bandwidth multiplier as encoded in highspeed endpoint descriptors */
+#define dwc2_hb_mult(wmaxpacketsize) (1 + (((wmaxpacketsize) >> 11) & 0x03))
+
+/* Packet size for any kind of endpoint descriptor */
+#define dwc2_max_packet(wmaxpacketsize) ((wmaxpacketsize) & 0x07ff)
+
+/*
+ * Returns true if frame1 is less than or equal to frame2. The comparison is
+ * done modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the
+ * frame number when the max frame number is reached.
+ */
+static inline int dwc2_frame_num_le(u16 frame1, u16 frame2)
+{
+ return ((frame2 - frame1) & HFNUM_MAX_FRNUM) <= (HFNUM_MAX_FRNUM >> 1);
+}
+
+/*
+ * Returns true if frame1 is greater than frame2. The comparison is done
+ * modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the frame
+ * number when the max frame number is reached.
+ */
+static inline int dwc2_frame_num_gt(u16 frame1, u16 frame2)
+{
+ return (frame1 != frame2) &&
+ ((frame1 - frame2) & HFNUM_MAX_FRNUM) < (HFNUM_MAX_FRNUM >> 1);
+}
+
+/*
+ * Increments frame by the amount specified by inc. The addition is done
+ * modulo HFNUM_MAX_FRNUM. Returns the incremented value.
+ */
+static inline u16 dwc2_frame_num_inc(u16 frame, u16 inc)
+{
+ return (frame + inc) & HFNUM_MAX_FRNUM;
+}
+
+static inline u16 dwc2_full_frame_num(u16 frame)
+{
+ return (frame & HFNUM_MAX_FRNUM) >> 3;
+}
+
+static inline u16 dwc2_micro_frame_num(u16 frame)
+{
+ return frame & 0x7;
+}
+
+/*
+ * Returns the Core Interrupt Status register contents, ANDed with the Core
+ * Interrupt Mask register contents
+ */
+static inline u32 dwc2_read_core_intr(struct dwc2_hsotg *hsotg)
+{
+ return readl(hsotg->regs + GINTSTS) & readl(hsotg->regs + GINTMSK);
+}
+
+static inline u32 dwc2_hcd_urb_get_status(struct dwc2_hcd_urb *dwc2_urb)
+{
+ return dwc2_urb->status;
+}
+
+static inline u32 dwc2_hcd_urb_get_actual_length(
+ struct dwc2_hcd_urb *dwc2_urb)
+{
+ return dwc2_urb->actual_length;
+}
+
+static inline u32 dwc2_hcd_urb_get_error_count(struct dwc2_hcd_urb *dwc2_urb)
+{
+ return dwc2_urb->error_count;
+}
+
+static inline void dwc2_hcd_urb_set_iso_desc_params(
+ struct dwc2_hcd_urb *dwc2_urb, int desc_num, u32 offset,
+ u32 length)
+{
+ dwc2_urb->iso_descs[desc_num].offset = offset;
+ dwc2_urb->iso_descs[desc_num].length = length;
+}
+
+static inline u32 dwc2_hcd_urb_get_iso_desc_status(
+ struct dwc2_hcd_urb *dwc2_urb, int desc_num)
+{
+ return dwc2_urb->iso_descs[desc_num].status;
+}
+
+static inline u32 dwc2_hcd_urb_get_iso_desc_actual_length(
+ struct dwc2_hcd_urb *dwc2_urb, int desc_num)
+{
+ return dwc2_urb->iso_descs[desc_num].actual_length;
+}
+
+static inline int dwc2_hcd_is_bandwidth_allocated(struct dwc2_hsotg *hsotg,
+ struct usb_host_endpoint *ep)
+{
+ struct dwc2_qh *qh = ep->hcpriv;
+
+ if (qh && !list_empty(&qh->qh_list_entry))
+ return 1;
+
+ return 0;
+}
+
+static inline u16 dwc2_hcd_get_ep_bandwidth(struct dwc2_hsotg *hsotg,
+ struct usb_host_endpoint *ep)
+{
+ struct dwc2_qh *qh = ep->hcpriv;
+
+ if (!qh) {
+ WARN_ON(1);
+ return 0;
+ }
+
+ return qh->usecs;
+}
+
+extern void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd);
+
+/* HCD Core API */
+
+/**
+ * dwc2_handle_hcd_intr() - Called on every hardware interrupt
+ *
+ * @hsotg: The DWC2 HCD
+ *
+ * Returns IRQ_HANDLED if interrupt is handled
+ * Return IRQ_NONE if interrupt is not handled
+ */
+extern irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg);
+
+/**
+ * dwc2_hcd_stop() - Halts the DWC_otg host mode operation
+ *
+ * @hsotg: The DWC2 HCD
+ */
+extern void dwc2_hcd_stop(struct dwc2_hsotg *hsotg);
+
+extern void dwc2_hcd_start(struct dwc2_hsotg *hsotg);
+extern void dwc2_hcd_disconnect(struct dwc2_hsotg *hsotg);
+
+/**
+ * dwc2_hcd_is_b_host() - Returns 1 if core currently is acting as B host,
+ * and 0 otherwise
+ *
+ * @hsotg: The DWC2 HCD
+ */
+extern int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg);
+
+/**
+ * dwc2_hcd_get_frame_number() - Returns current frame number
+ *
+ * @hsotg: The DWC2 HCD
+ */
+extern int dwc2_hcd_get_frame_number(struct dwc2_hsotg *hsotg);
+
+/**
+ * dwc2_hcd_dump_state() - Dumps hsotg state
+ *
+ * @hsotg: The DWC2 HCD
+ *
+ * NOTE: This function will be removed once the peripheral controller code
+ * is integrated and the driver is stable
+ */
+extern void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg);
+
+/**
+ * dwc2_hcd_dump_frrem() - Dumps the average frame remaining at SOF
+ *
+ * @hsotg: The DWC2 HCD
+ *
+ * This can be used to determine average interrupt latency. Frame remaining is
+ * also shown for start transfer and two additional sample points.
+ *
+ * NOTE: This function will be removed once the peripheral controller code
+ * is integrated and the driver is stable
+ */
+extern void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg);
+
+/* URB interface */
+
+/* Transfer flags */
+#define URB_GIVEBACK_ASAP 0x1
+#define URB_SEND_ZERO_PACKET 0x2
+
+/* Host driver callbacks */
+
+extern void dwc2_host_start(struct dwc2_hsotg *hsotg);
+extern void dwc2_host_disconnect(struct dwc2_hsotg *hsotg);
+extern void dwc2_host_hub_info(struct dwc2_hsotg *hsotg, void *context,
+ int *hub_addr, int *hub_port);
+extern int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context);
+extern void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
+ int status);
+
+#ifdef DEBUG
+/*
+ * Macro to sample the remaining PHY clocks left in the current frame. This
+ * may be used during debugging to determine the average time it takes to
+ * execute sections of code. There are two possible sample points, "a" and
+ * "b", so the _letter_ argument must be one of these values.
+ *
+ * To dump the average sample times, read the "hcd_frrem" sysfs attribute. For
+ * example, "cat /sys/devices/lm0/hcd_frrem".
+ */
+#define dwc2_sample_frrem(_hcd_, _qh_, _letter_) \
+do { \
+ struct hfnum_data _hfnum_; \
+ struct dwc2_qtd *_qtd_; \
+ \
+ _qtd_ = list_entry((_qh_)->qtd_list.next, struct dwc2_qtd, \
+ qtd_list_entry); \
+ if (usb_pipeint(_qtd_->urb->pipe) && \
+ (_qh_)->start_split_frame != 0 && !_qtd_->complete_split) { \
+ _hfnum_.d32 = readl((_hcd_)->regs + HFNUM); \
+ switch (_hfnum_.b.frnum & 0x7) { \
+ case 7: \
+ (_hcd_)->hfnum_7_samples_##_letter_++; \
+ (_hcd_)->hfnum_7_frrem_accum_##_letter_ += \
+ _hfnum_.b.frrem; \
+ break; \
+ case 0: \
+ (_hcd_)->hfnum_0_samples_##_letter_++; \
+ (_hcd_)->hfnum_0_frrem_accum_##_letter_ += \
+ _hfnum_.b.frrem; \
+ break; \
+ default: \
+ (_hcd_)->hfnum_other_samples_##_letter_++; \
+ (_hcd_)->hfnum_other_frrem_accum_##_letter_ += \
+ _hfnum_.b.frrem; \
+ break; \
+ } \
+ } \
+} while (0)
+#else
+#define dwc2_sample_frrem(_hcd_, _qh_, _letter_) do {} while (0)
+#endif
+
+#endif /* __DWC2_HCD_H__ */
--- /dev/null
+/*
+ * hcd_ddma.c - DesignWare HS OTG Controller descriptor DMA routines
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file contains the Descriptor DMA implementation for Host mode
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <linux/usb/hcd.h>
+#include <linux/usb/ch11.h>
+
+#include "core.h"
+#include "hcd.h"
+
+static u16 dwc2_frame_list_idx(u16 frame)
+{
+ return frame & (FRLISTEN_64_SIZE - 1);
+}
+
+static u16 dwc2_desclist_idx_inc(u16 idx, u16 inc, u8 speed)
+{
+ return (idx + inc) &
+ ((speed == USB_SPEED_HIGH ? MAX_DMA_DESC_NUM_HS_ISOC :
+ MAX_DMA_DESC_NUM_GENERIC) - 1);
+}
+
+static u16 dwc2_desclist_idx_dec(u16 idx, u16 inc, u8 speed)
+{
+ return (idx - inc) &
+ ((speed == USB_SPEED_HIGH ? MAX_DMA_DESC_NUM_HS_ISOC :
+ MAX_DMA_DESC_NUM_GENERIC) - 1);
+}
+
+static u16 dwc2_max_desc_num(struct dwc2_qh *qh)
+{
+ return (qh->ep_type == USB_ENDPOINT_XFER_ISOC &&
+ qh->dev_speed == USB_SPEED_HIGH) ?
+ MAX_DMA_DESC_NUM_HS_ISOC : MAX_DMA_DESC_NUM_GENERIC;
+}
+
+static u16 dwc2_frame_incr_val(struct dwc2_qh *qh)
+{
+ return qh->dev_speed == USB_SPEED_HIGH ?
+ (qh->interval + 8 - 1) / 8 : qh->interval;
+}
+
+static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ gfp_t flags)
+{
+ qh->desc_list = dma_alloc_coherent(hsotg->dev,
+ sizeof(struct dwc2_hcd_dma_desc) *
+ dwc2_max_desc_num(qh), &qh->desc_list_dma,
+ flags);
+
+ if (!qh->desc_list)
+ return -ENOMEM;
+
+ memset(qh->desc_list, 0,
+ sizeof(struct dwc2_hcd_dma_desc) * dwc2_max_desc_num(qh));
+
+ qh->n_bytes = kzalloc(sizeof(u32) * dwc2_max_desc_num(qh), flags);
+ if (!qh->n_bytes) {
+ dma_free_coherent(hsotg->dev, sizeof(struct dwc2_hcd_dma_desc)
+ * dwc2_max_desc_num(qh), qh->desc_list,
+ qh->desc_list_dma);
+ qh->desc_list = NULL;
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void dwc2_desc_list_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ if (qh->desc_list) {
+ dma_free_coherent(hsotg->dev, sizeof(struct dwc2_hcd_dma_desc)
+ * dwc2_max_desc_num(qh), qh->desc_list,
+ qh->desc_list_dma);
+ qh->desc_list = NULL;
+ }
+
+ kfree(qh->n_bytes);
+ qh->n_bytes = NULL;
+}
+
+static int dwc2_frame_list_alloc(struct dwc2_hsotg *hsotg, gfp_t mem_flags)
+{
+ if (hsotg->frame_list)
+ return 0;
+
+ hsotg->frame_list = dma_alloc_coherent(hsotg->dev,
+ 4 * FRLISTEN_64_SIZE,
+ &hsotg->frame_list_dma,
+ mem_flags);
+ if (!hsotg->frame_list)
+ return -ENOMEM;
+
+ memset(hsotg->frame_list, 0, 4 * FRLISTEN_64_SIZE);
+ return 0;
+}
+
+static void dwc2_frame_list_free(struct dwc2_hsotg *hsotg)
+{
+ u32 *frame_list;
+ dma_addr_t frame_list_dma;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ if (!hsotg->frame_list) {
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ return;
+ }
+
+ frame_list = hsotg->frame_list;
+ frame_list_dma = hsotg->frame_list_dma;
+ hsotg->frame_list = NULL;
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+
+ dma_free_coherent(hsotg->dev, 4 * FRLISTEN_64_SIZE, frame_list,
+ frame_list_dma);
+}
+
+static void dwc2_per_sched_enable(struct dwc2_hsotg *hsotg, u32 fr_list_en)
+{
+ u32 hcfg;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ hcfg = readl(hsotg->regs + HCFG);
+ if (hcfg & HCFG_PERSCHEDENA) {
+ /* already enabled */
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ return;
+ }
+
+ writel(hsotg->frame_list_dma, hsotg->regs + HFLBADDR);
+
+ hcfg &= ~HCFG_FRLISTEN_MASK;
+ hcfg |= fr_list_en | HCFG_PERSCHEDENA;
+ dev_vdbg(hsotg->dev, "Enabling Periodic schedule\n");
+ writel(hcfg, hsotg->regs + HCFG);
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+}
+
+static void dwc2_per_sched_disable(struct dwc2_hsotg *hsotg)
+{
+ u32 hcfg;
+ unsigned long flags;
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ hcfg = readl(hsotg->regs + HCFG);
+ if (!(hcfg & HCFG_PERSCHEDENA)) {
+ /* already disabled */
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ return;
+ }
+
+ hcfg &= ~HCFG_PERSCHEDENA;
+ dev_vdbg(hsotg->dev, "Disabling Periodic schedule\n");
+ writel(hcfg, hsotg->regs + HCFG);
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+}
+
+/*
+ * Activates/Deactivates FrameList entries for the channel based on endpoint
+ * servicing period
+ */
+static void dwc2_update_frame_list(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ int enable)
+{
+ struct dwc2_host_chan *chan;
+ u16 i, j, inc;
+
+ if (!hsotg) {
+ pr_err("hsotg = %p\n", hsotg);
+ return;
+ }
+
+ if (!qh->channel) {
+ dev_err(hsotg->dev, "qh->channel = %p\n", qh->channel);
+ return;
+ }
+
+ if (!hsotg->frame_list) {
+ dev_err(hsotg->dev, "hsotg->frame_list = %p\n",
+ hsotg->frame_list);
+ return;
+ }
+
+ chan = qh->channel;
+ inc = dwc2_frame_incr_val(qh);
+ if (qh->ep_type == USB_ENDPOINT_XFER_ISOC)
+ i = dwc2_frame_list_idx(qh->sched_frame);
+ else
+ i = 0;
+
+ j = i;
+ do {
+ if (enable)
+ hsotg->frame_list[j] |= 1 << chan->hc_num;
+ else
+ hsotg->frame_list[j] &= ~(1 << chan->hc_num);
+ j = (j + inc) & (FRLISTEN_64_SIZE - 1);
+ } while (j != i);
+
+ if (!enable)
+ return;
+
+ chan->schinfo = 0;
+ if (chan->speed == USB_SPEED_HIGH && qh->interval) {
+ j = 1;
+ /* TODO - check this */
+ inc = (8 + qh->interval - 1) / qh->interval;
+ for (i = 0; i < inc; i++) {
+ chan->schinfo |= j;
+ j = j << qh->interval;
+ }
+ } else {
+ chan->schinfo = 0xff;
+ }
+}
+
+static void dwc2_release_channel_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh)
+{
+ struct dwc2_host_chan *chan = qh->channel;
+
+ if (dwc2_qh_is_non_per(qh)) {
+ if (hsotg->core_params->uframe_sched > 0)
+ hsotg->available_host_channels++;
+ else
+ hsotg->non_periodic_channels--;
+ } else {
+ dwc2_update_frame_list(hsotg, qh, 0);
+ }
+
+ /*
+ * The condition is added to prevent double cleanup try in case of
+ * device disconnect. See channel cleanup in dwc2_hcd_disconnect().
+ */
+ if (chan->qh) {
+ if (!list_empty(&chan->hc_list_entry))
+ list_del(&chan->hc_list_entry);
+ dwc2_hc_cleanup(hsotg, chan);
+ list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
+ chan->qh = NULL;
+ }
+
+ qh->channel = NULL;
+ qh->ntd = 0;
+
+ if (qh->desc_list)
+ memset(qh->desc_list, 0, sizeof(struct dwc2_hcd_dma_desc) *
+ dwc2_max_desc_num(qh));
+}
+
+/**
+ * dwc2_hcd_qh_init_ddma() - Initializes a QH structure's Descriptor DMA
+ * related members
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: The QH to init
+ *
+ * Return: 0 if successful, negative error code otherwise
+ *
+ * Allocates memory for the descriptor list. For the first periodic QH,
+ * allocates memory for the FrameList and enables periodic scheduling.
+ */
+int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ gfp_t mem_flags)
+{
+ int retval;
+
+ if (qh->do_split) {
+ dev_err(hsotg->dev,
+ "SPLIT Transfers are not supported in Descriptor DMA mode.\n");
+ retval = -EINVAL;
+ goto err0;
+ }
+
+ retval = dwc2_desc_list_alloc(hsotg, qh, mem_flags);
+ if (retval)
+ goto err0;
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_ISOC ||
+ qh->ep_type == USB_ENDPOINT_XFER_INT) {
+ if (!hsotg->frame_list) {
+ retval = dwc2_frame_list_alloc(hsotg, mem_flags);
+ if (retval)
+ goto err1;
+ /* Enable periodic schedule on first periodic QH */
+ dwc2_per_sched_enable(hsotg, HCFG_FRLISTEN_64);
+ }
+ }
+
+ qh->ntd = 0;
+ return 0;
+
+err1:
+ dwc2_desc_list_free(hsotg, qh);
+err0:
+ return retval;
+}
+
+/**
+ * dwc2_hcd_qh_free_ddma() - Frees a QH structure's Descriptor DMA related
+ * members
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: The QH to free
+ *
+ * Frees descriptor list memory associated with the QH. If QH is periodic and
+ * the last, frees FrameList memory and disables periodic scheduling.
+ */
+void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ dwc2_desc_list_free(hsotg, qh);
+
+ /*
+ * Channel still assigned due to some reasons.
+ * Seen on Isoc URB dequeue. Channel halted but no subsequent
+ * ChHalted interrupt to release the channel. Afterwards
+ * when it comes here from endpoint disable routine
+ * channel remains assigned.
+ */
+ if (qh->channel)
+ dwc2_release_channel_ddma(hsotg, qh);
+
+ if ((qh->ep_type == USB_ENDPOINT_XFER_ISOC ||
+ qh->ep_type == USB_ENDPOINT_XFER_INT) &&
+ (hsotg->core_params->uframe_sched > 0 ||
+ !hsotg->periodic_channels) && hsotg->frame_list) {
+ dwc2_per_sched_disable(hsotg);
+ dwc2_frame_list_free(hsotg);
+ }
+}
+
+static u8 dwc2_frame_to_desc_idx(struct dwc2_qh *qh, u16 frame_idx)
+{
+ if (qh->dev_speed == USB_SPEED_HIGH)
+ /* Descriptor set (8 descriptors) index which is 8-aligned */
+ return (frame_idx & ((MAX_DMA_DESC_NUM_HS_ISOC / 8) - 1)) * 8;
+ else
+ return frame_idx & (MAX_DMA_DESC_NUM_GENERIC - 1);
+}
+
+/*
+ * Determine starting frame for Isochronous transfer.
+ * Few frames skipped to prevent race condition with HC.
+ */
+static u16 dwc2_calc_starting_frame(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh, u16 *skip_frames)
+{
+ u16 frame;
+
+ hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);
+
+ /* sched_frame is always frame number (not uFrame) both in FS and HS! */
+
+ /*
+ * skip_frames is used to limit activated descriptors number
+ * to avoid the situation when HC services the last activated
+ * descriptor firstly.
+ * Example for FS:
+ * Current frame is 1, scheduled frame is 3. Since HC always fetches
+ * the descriptor corresponding to curr_frame+1, the descriptor
+ * corresponding to frame 2 will be fetched. If the number of
+ * descriptors is max=64 (or greather) the list will be fully programmed
+ * with Active descriptors and it is possible case (rare) that the
+ * latest descriptor(considering rollback) corresponding to frame 2 will
+ * be serviced first. HS case is more probable because, in fact, up to
+ * 11 uframes (16 in the code) may be skipped.
+ */
+ if (qh->dev_speed == USB_SPEED_HIGH) {
+ /*
+ * Consider uframe counter also, to start xfer asap. If half of
+ * the frame elapsed skip 2 frames otherwise just 1 frame.
+ * Starting descriptor index must be 8-aligned, so if the
+ * current frame is near to complete the next one is skipped as
+ * well.
+ */
+ if (dwc2_micro_frame_num(hsotg->frame_number) >= 5) {
+ *skip_frames = 2 * 8;
+ frame = dwc2_frame_num_inc(hsotg->frame_number,
+ *skip_frames);
+ } else {
+ *skip_frames = 1 * 8;
+ frame = dwc2_frame_num_inc(hsotg->frame_number,
+ *skip_frames);
+ }
+
+ frame = dwc2_full_frame_num(frame);
+ } else {
+ /*
+ * Two frames are skipped for FS - the current and the next.
+ * But for descriptor programming, 1 frame (descriptor) is
+ * enough, see example above.
+ */
+ *skip_frames = 1;
+ frame = dwc2_frame_num_inc(hsotg->frame_number, 2);
+ }
+
+ return frame;
+}
+
+/*
+ * Calculate initial descriptor index for isochronous transfer based on
+ * scheduled frame
+ */
+static u16 dwc2_recalc_initial_desc_idx(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh)
+{
+ u16 frame, fr_idx, fr_idx_tmp, skip_frames;
+
+ /*
+ * With current ISOC processing algorithm the channel is being released
+ * when no more QTDs in the list (qh->ntd == 0). Thus this function is
+ * called only when qh->ntd == 0 and qh->channel == 0.
+ *
+ * So qh->channel != NULL branch is not used and just not removed from
+ * the source file. It is required for another possible approach which
+ * is, do not disable and release the channel when ISOC session
+ * completed, just move QH to inactive schedule until new QTD arrives.
+ * On new QTD, the QH moved back to 'ready' schedule, starting frame and
+ * therefore starting desc_index are recalculated. In this case channel
+ * is released only on ep_disable.
+ */
+
+ /*
+ * Calculate starting descriptor index. For INTERRUPT endpoint it is
+ * always 0.
+ */
+ if (qh->channel) {
+ frame = dwc2_calc_starting_frame(hsotg, qh, &skip_frames);
+ /*
+ * Calculate initial descriptor index based on FrameList current
+ * bitmap and servicing period
+ */
+ fr_idx_tmp = dwc2_frame_list_idx(frame);
+ fr_idx = (FRLISTEN_64_SIZE +
+ dwc2_frame_list_idx(qh->sched_frame) - fr_idx_tmp)
+ % dwc2_frame_incr_val(qh);
+ fr_idx = (fr_idx + fr_idx_tmp) % FRLISTEN_64_SIZE;
+ } else {
+ qh->sched_frame = dwc2_calc_starting_frame(hsotg, qh,
+ &skip_frames);
+ fr_idx = dwc2_frame_list_idx(qh->sched_frame);
+ }
+
+ qh->td_first = qh->td_last = dwc2_frame_to_desc_idx(qh, fr_idx);
+
+ return skip_frames;
+}
+
+#define ISOC_URB_GIVEBACK_ASAP
+
+#define MAX_ISOC_XFER_SIZE_FS 1023
+#define MAX_ISOC_XFER_SIZE_HS 3072
+#define DESCNUM_THRESHOLD 4
+
+static void dwc2_fill_host_isoc_dma_desc(struct dwc2_hsotg *hsotg,
+ struct dwc2_qtd *qtd,
+ struct dwc2_qh *qh, u32 max_xfer_size,
+ u16 idx)
+{
+ struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[idx];
+ struct dwc2_hcd_iso_packet_desc *frame_desc;
+
+ memset(dma_desc, 0, sizeof(*dma_desc));
+ frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index_last];
+
+ if (frame_desc->length > max_xfer_size)
+ qh->n_bytes[idx] = max_xfer_size;
+ else
+ qh->n_bytes[idx] = frame_desc->length;
+
+ dma_desc->buf = (u32)(qtd->urb->dma + frame_desc->offset);
+ dma_desc->status = qh->n_bytes[idx] << HOST_DMA_ISOC_NBYTES_SHIFT &
+ HOST_DMA_ISOC_NBYTES_MASK;
+
+#ifdef ISOC_URB_GIVEBACK_ASAP
+ /* Set IOC for each descriptor corresponding to last frame of URB */
+ if (qtd->isoc_frame_index_last == qtd->urb->packet_count)
+ dma_desc->status |= HOST_DMA_IOC;
+#endif
+
+ qh->ntd++;
+ qtd->isoc_frame_index_last++;
+}
+
+static void dwc2_init_isoc_dma_desc(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh, u16 skip_frames)
+{
+ struct dwc2_qtd *qtd;
+ u32 max_xfer_size;
+ u16 idx, inc, n_desc, ntd_max = 0;
+
+ idx = qh->td_last;
+ inc = qh->interval;
+ n_desc = 0;
+
+ if (qh->interval) {
+ ntd_max = (dwc2_max_desc_num(qh) + qh->interval - 1) /
+ qh->interval;
+ if (skip_frames && !qh->channel)
+ ntd_max -= skip_frames / qh->interval;
+ }
+
+ max_xfer_size = qh->dev_speed == USB_SPEED_HIGH ?
+ MAX_ISOC_XFER_SIZE_HS : MAX_ISOC_XFER_SIZE_FS;
+
+ list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry) {
+ while (qh->ntd < ntd_max && qtd->isoc_frame_index_last <
+ qtd->urb->packet_count) {
+ if (n_desc > 1)
+ qh->desc_list[n_desc - 1].status |= HOST_DMA_A;
+ dwc2_fill_host_isoc_dma_desc(hsotg, qtd, qh,
+ max_xfer_size, idx);
+ idx = dwc2_desclist_idx_inc(idx, inc, qh->dev_speed);
+ n_desc++;
+ }
+ qtd->in_process = 1;
+ }
+
+ qh->td_last = idx;
+
+#ifdef ISOC_URB_GIVEBACK_ASAP
+ /* Set IOC for last descriptor if descriptor list is full */
+ if (qh->ntd == ntd_max) {
+ idx = dwc2_desclist_idx_dec(qh->td_last, inc, qh->dev_speed);
+ qh->desc_list[idx].status |= HOST_DMA_IOC;
+ }
+#else
+ /*
+ * Set IOC bit only for one descriptor. Always try to be ahead of HW
+ * processing, i.e. on IOC generation driver activates next descriptor
+ * but core continues to process descriptors following the one with IOC
+ * set.
+ */
+
+ if (n_desc > DESCNUM_THRESHOLD)
+ /*
+ * Move IOC "up". Required even if there is only one QTD
+ * in the list, because QTDs might continue to be queued,
+ * but during the activation it was only one queued.
+ * Actually more than one QTD might be in the list if this
+ * function called from XferCompletion - QTDs was queued during
+ * HW processing of the previous descriptor chunk.
+ */
+ idx = dwc2_desclist_idx_dec(idx, inc * ((qh->ntd + 1) / 2),
+ qh->dev_speed);
+ else
+ /*
+ * Set the IOC for the latest descriptor if either number of
+ * descriptors is not greater than threshold or no more new
+ * descriptors activated
+ */
+ idx = dwc2_desclist_idx_dec(qh->td_last, inc, qh->dev_speed);
+
+ qh->desc_list[idx].status |= HOST_DMA_IOC;
+#endif
+
+ if (n_desc) {
+ qh->desc_list[n_desc - 1].status |= HOST_DMA_A;
+ if (n_desc > 1)
+ qh->desc_list[0].status |= HOST_DMA_A;
+ }
+}
+
+static void dwc2_fill_host_dma_desc(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ struct dwc2_qtd *qtd, struct dwc2_qh *qh,
+ int n_desc)
+{
+ struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[n_desc];
+ int len = chan->xfer_len;
+
+ if (len > MAX_DMA_DESC_SIZE - (chan->max_packet - 1))
+ len = MAX_DMA_DESC_SIZE - (chan->max_packet - 1);
+
+ if (chan->ep_is_in) {
+ int num_packets;
+
+ if (len > 0 && chan->max_packet)
+ num_packets = (len + chan->max_packet - 1)
+ / chan->max_packet;
+ else
+ /* Need 1 packet for transfer length of 0 */
+ num_packets = 1;
+
+ /* Always program an integral # of packets for IN transfers */
+ len = num_packets * chan->max_packet;
+ }
+
+ dma_desc->status = len << HOST_DMA_NBYTES_SHIFT & HOST_DMA_NBYTES_MASK;
+ qh->n_bytes[n_desc] = len;
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_CONTROL &&
+ qtd->control_phase == DWC2_CONTROL_SETUP)
+ dma_desc->status |= HOST_DMA_SUP;
+
+ dma_desc->buf = (u32)chan->xfer_dma;
+
+ /*
+ * Last (or only) descriptor of IN transfer with actual size less
+ * than MaxPacket
+ */
+ if (len > chan->xfer_len) {
+ chan->xfer_len = 0;
+ } else {
+ chan->xfer_dma += len;
+ chan->xfer_len -= len;
+ }
+}
+
+static void dwc2_init_non_isoc_dma_desc(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh)
+{
+ struct dwc2_qtd *qtd;
+ struct dwc2_host_chan *chan = qh->channel;
+ int n_desc = 0;
+
+ dev_vdbg(hsotg->dev, "%s(): qh=%p dma=%08lx len=%d\n", __func__, qh,
+ (unsigned long)chan->xfer_dma, chan->xfer_len);
+
+ /*
+ * Start with chan->xfer_dma initialized in assign_and_init_hc(), then
+ * if SG transfer consists of multiple URBs, this pointer is re-assigned
+ * to the buffer of the currently processed QTD. For non-SG request
+ * there is always one QTD active.
+ */
+
+ list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry) {
+ dev_vdbg(hsotg->dev, "qtd=%p\n", qtd);
+
+ if (n_desc) {
+ /* SG request - more than 1 QTD */
+ chan->xfer_dma = qtd->urb->dma +
+ qtd->urb->actual_length;
+ chan->xfer_len = qtd->urb->length -
+ qtd->urb->actual_length;
+ dev_vdbg(hsotg->dev, "buf=%08lx len=%d\n",
+ (unsigned long)chan->xfer_dma, chan->xfer_len);
+ }
+
+ qtd->n_desc = 0;
+ do {
+ if (n_desc > 1) {
+ qh->desc_list[n_desc - 1].status |= HOST_DMA_A;
+ dev_vdbg(hsotg->dev,
+ "set A bit in desc %d (%p)\n",
+ n_desc - 1,
+ &qh->desc_list[n_desc - 1]);
+ }
+ dwc2_fill_host_dma_desc(hsotg, chan, qtd, qh, n_desc);
+ dev_vdbg(hsotg->dev,
+ "desc %d (%p) buf=%08x status=%08x\n",
+ n_desc, &qh->desc_list[n_desc],
+ qh->desc_list[n_desc].buf,
+ qh->desc_list[n_desc].status);
+ qtd->n_desc++;
+ n_desc++;
+ } while (chan->xfer_len > 0 &&
+ n_desc != MAX_DMA_DESC_NUM_GENERIC);
+
+ dev_vdbg(hsotg->dev, "n_desc=%d\n", n_desc);
+ qtd->in_process = 1;
+ if (qh->ep_type == USB_ENDPOINT_XFER_CONTROL)
+ break;
+ if (n_desc == MAX_DMA_DESC_NUM_GENERIC)
+ break;
+ }
+
+ if (n_desc) {
+ qh->desc_list[n_desc - 1].status |=
+ HOST_DMA_IOC | HOST_DMA_EOL | HOST_DMA_A;
+ dev_vdbg(hsotg->dev, "set IOC/EOL/A bits in desc %d (%p)\n",
+ n_desc - 1, &qh->desc_list[n_desc - 1]);
+ if (n_desc > 1) {
+ qh->desc_list[0].status |= HOST_DMA_A;
+ dev_vdbg(hsotg->dev, "set A bit in desc 0 (%p)\n",
+ &qh->desc_list[0]);
+ }
+ chan->ntd = n_desc;
+ }
+}
+
+/**
+ * dwc2_hcd_start_xfer_ddma() - Starts a transfer in Descriptor DMA mode
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: The QH to init
+ *
+ * Return: 0 if successful, negative error code otherwise
+ *
+ * For Control and Bulk endpoints, initializes descriptor list and starts the
+ * transfer. For Interrupt and Isochronous endpoints, initializes descriptor
+ * list then updates FrameList, marking appropriate entries as active.
+ *
+ * For Isochronous endpoints the starting descriptor index is calculated based
+ * on the scheduled frame, but only on the first transfer descriptor within a
+ * session. Then the transfer is started via enabling the channel.
+ *
+ * For Isochronous endpoints the channel is not halted on XferComplete
+ * interrupt so remains assigned to the endpoint(QH) until session is done.
+ */
+void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ /* Channel is already assigned */
+ struct dwc2_host_chan *chan = qh->channel;
+ u16 skip_frames = 0;
+
+ switch (chan->ep_type) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ case USB_ENDPOINT_XFER_BULK:
+ dwc2_init_non_isoc_dma_desc(hsotg, qh);
+ dwc2_hc_start_transfer_ddma(hsotg, chan);
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ dwc2_init_non_isoc_dma_desc(hsotg, qh);
+ dwc2_update_frame_list(hsotg, qh, 1);
+ dwc2_hc_start_transfer_ddma(hsotg, chan);
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ if (!qh->ntd)
+ skip_frames = dwc2_recalc_initial_desc_idx(hsotg, qh);
+ dwc2_init_isoc_dma_desc(hsotg, qh, skip_frames);
+
+ if (!chan->xfer_started) {
+ dwc2_update_frame_list(hsotg, qh, 1);
+
+ /*
+ * Always set to max, instead of actual size. Otherwise
+ * ntd will be changed with channel being enabled. Not
+ * recommended.
+ */
+ chan->ntd = dwc2_max_desc_num(qh);
+
+ /* Enable channel only once for ISOC */
+ dwc2_hc_start_transfer_ddma(hsotg, chan);
+ }
+
+ break;
+ default:
+ break;
+ }
+}
+
+#define DWC2_CMPL_DONE 1
+#define DWC2_CMPL_STOP 2
+
+static int dwc2_cmpl_host_isoc_dma_desc(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ struct dwc2_qtd *qtd,
+ struct dwc2_qh *qh, u16 idx)
+{
+ struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[idx];
+ struct dwc2_hcd_iso_packet_desc *frame_desc;
+ u16 remain = 0;
+ int rc = 0;
+
+ if (!qtd->urb)
+ return -EINVAL;
+
+ frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index_last];
+ dma_desc->buf = (u32)(qtd->urb->dma + frame_desc->offset);
+ if (chan->ep_is_in)
+ remain = (dma_desc->status & HOST_DMA_ISOC_NBYTES_MASK) >>
+ HOST_DMA_ISOC_NBYTES_SHIFT;
+
+ if ((dma_desc->status & HOST_DMA_STS_MASK) == HOST_DMA_STS_PKTERR) {
+ /*
+ * XactError, or unable to complete all the transactions
+ * in the scheduled micro-frame/frame, both indicated by
+ * HOST_DMA_STS_PKTERR
+ */
+ qtd->urb->error_count++;
+ frame_desc->actual_length = qh->n_bytes[idx] - remain;
+ frame_desc->status = -EPROTO;
+ } else {
+ /* Success */
+ frame_desc->actual_length = qh->n_bytes[idx] - remain;
+ frame_desc->status = 0;
+ }
+
+ if (++qtd->isoc_frame_index == qtd->urb->packet_count) {
+ /*
+ * urb->status is not used for isoc transfers here. The
+ * individual frame_desc status are used instead.
+ */
+ dwc2_host_complete(hsotg, qtd, 0);
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
+
+ /*
+ * This check is necessary because urb_dequeue can be called
+ * from urb complete callback (sound driver for example). All
+ * pending URBs are dequeued there, so no need for further
+ * processing.
+ */
+ if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE)
+ return -1;
+ rc = DWC2_CMPL_DONE;
+ }
+
+ qh->ntd--;
+
+ /* Stop if IOC requested descriptor reached */
+ if (dma_desc->status & HOST_DMA_IOC)
+ rc = DWC2_CMPL_STOP;
+
+ return rc;
+}
+
+static void dwc2_complete_isoc_xfer_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ enum dwc2_halt_status halt_status)
+{
+ struct dwc2_hcd_iso_packet_desc *frame_desc;
+ struct dwc2_qtd *qtd, *qtd_tmp;
+ struct dwc2_qh *qh;
+ u16 idx;
+ int rc;
+
+ qh = chan->qh;
+ idx = qh->td_first;
+
+ if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) {
+ list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry)
+ qtd->in_process = 0;
+ return;
+ }
+
+ if (halt_status == DWC2_HC_XFER_AHB_ERR ||
+ halt_status == DWC2_HC_XFER_BABBLE_ERR) {
+ /*
+ * Channel is halted in these error cases, considered as serious
+ * issues.
+ * Complete all URBs marking all frames as failed, irrespective
+ * whether some of the descriptors (frames) succeeded or not.
+ * Pass error code to completion routine as well, to update
+ * urb->status, some of class drivers might use it to stop
+ * queing transfer requests.
+ */
+ int err = halt_status == DWC2_HC_XFER_AHB_ERR ?
+ -EIO : -EOVERFLOW;
+
+ list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list,
+ qtd_list_entry) {
+ if (qtd->urb) {
+ for (idx = 0; idx < qtd->urb->packet_count;
+ idx++) {
+ frame_desc = &qtd->urb->iso_descs[idx];
+ frame_desc->status = err;
+ }
+
+ dwc2_host_complete(hsotg, qtd, err);
+ }
+
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
+ }
+
+ return;
+ }
+
+ list_for_each_entry_safe(qtd, qtd_tmp, &qh->qtd_list, qtd_list_entry) {
+ if (!qtd->in_process)
+ break;
+ do {
+ rc = dwc2_cmpl_host_isoc_dma_desc(hsotg, chan, qtd, qh,
+ idx);
+ if (rc < 0)
+ return;
+ idx = dwc2_desclist_idx_inc(idx, qh->interval,
+ chan->speed);
+ if (rc == DWC2_CMPL_STOP)
+ goto stop_scan;
+ if (rc == DWC2_CMPL_DONE)
+ break;
+ } while (idx != qh->td_first);
+ }
+
+stop_scan:
+ qh->td_first = idx;
+}
+
+static int dwc2_update_non_isoc_urb_state_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ struct dwc2_qtd *qtd,
+ struct dwc2_hcd_dma_desc *dma_desc,
+ enum dwc2_halt_status halt_status,
+ u32 n_bytes, int *xfer_done)
+{
+ struct dwc2_hcd_urb *urb = qtd->urb;
+ u16 remain = 0;
+
+ if (chan->ep_is_in)
+ remain = (dma_desc->status & HOST_DMA_NBYTES_MASK) >>
+ HOST_DMA_NBYTES_SHIFT;
+
+ dev_vdbg(hsotg->dev, "remain=%d dwc2_urb=%p\n", remain, urb);
+
+ if (halt_status == DWC2_HC_XFER_AHB_ERR) {
+ dev_err(hsotg->dev, "EIO\n");
+ urb->status = -EIO;
+ return 1;
+ }
+
+ if ((dma_desc->status & HOST_DMA_STS_MASK) == HOST_DMA_STS_PKTERR) {
+ switch (halt_status) {
+ case DWC2_HC_XFER_STALL:
+ dev_vdbg(hsotg->dev, "Stall\n");
+ urb->status = -EPIPE;
+ break;
+ case DWC2_HC_XFER_BABBLE_ERR:
+ dev_err(hsotg->dev, "Babble\n");
+ urb->status = -EOVERFLOW;
+ break;
+ case DWC2_HC_XFER_XACT_ERR:
+ dev_err(hsotg->dev, "XactErr\n");
+ urb->status = -EPROTO;
+ break;
+ default:
+ dev_err(hsotg->dev,
+ "%s: Unhandled descriptor error status (%d)\n",
+ __func__, halt_status);
+ break;
+ }
+ return 1;
+ }
+
+ if (dma_desc->status & HOST_DMA_A) {
+ dev_vdbg(hsotg->dev,
+ "Active descriptor encountered on channel %d\n",
+ chan->hc_num);
+ return 0;
+ }
+
+ if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL) {
+ if (qtd->control_phase == DWC2_CONTROL_DATA) {
+ urb->actual_length += n_bytes - remain;
+ if (remain || urb->actual_length >= urb->length) {
+ /*
+ * For Control Data stage do not set urb->status
+ * to 0, to prevent URB callback. Set it when
+ * Status phase is done. See below.
+ */
+ *xfer_done = 1;
+ }
+ } else if (qtd->control_phase == DWC2_CONTROL_STATUS) {
+ urb->status = 0;
+ *xfer_done = 1;
+ }
+ /* No handling for SETUP stage */
+ } else {
+ /* BULK and INTR */
+ urb->actual_length += n_bytes - remain;
+ dev_vdbg(hsotg->dev, "length=%d actual=%d\n", urb->length,
+ urb->actual_length);
+ if (remain || urb->actual_length >= urb->length) {
+ urb->status = 0;
+ *xfer_done = 1;
+ }
+ }
+
+ return 0;
+}
+
+static int dwc2_process_non_isoc_desc(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ int chnum, struct dwc2_qtd *qtd,
+ int desc_num,
+ enum dwc2_halt_status halt_status,
+ int *xfer_done)
+{
+ struct dwc2_qh *qh = chan->qh;
+ struct dwc2_hcd_urb *urb = qtd->urb;
+ struct dwc2_hcd_dma_desc *dma_desc;
+ u32 n_bytes;
+ int failed;
+
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ if (!urb)
+ return -EINVAL;
+
+ dma_desc = &qh->desc_list[desc_num];
+ n_bytes = qh->n_bytes[desc_num];
+ dev_vdbg(hsotg->dev,
+ "qtd=%p dwc2_urb=%p desc_num=%d desc=%p n_bytes=%d\n",
+ qtd, urb, desc_num, dma_desc, n_bytes);
+ failed = dwc2_update_non_isoc_urb_state_ddma(hsotg, chan, qtd, dma_desc,
+ halt_status, n_bytes,
+ xfer_done);
+ if (failed || (*xfer_done && urb->status != -EINPROGRESS)) {
+ dwc2_host_complete(hsotg, qtd, urb->status);
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
+ dev_vdbg(hsotg->dev, "failed=%1x xfer_done=%1x status=%08x\n",
+ failed, *xfer_done, urb->status);
+ return failed;
+ }
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_CONTROL) {
+ switch (qtd->control_phase) {
+ case DWC2_CONTROL_SETUP:
+ if (urb->length > 0)
+ qtd->control_phase = DWC2_CONTROL_DATA;
+ else
+ qtd->control_phase = DWC2_CONTROL_STATUS;
+ dev_vdbg(hsotg->dev,
+ " Control setup transaction done\n");
+ break;
+ case DWC2_CONTROL_DATA:
+ if (*xfer_done) {
+ qtd->control_phase = DWC2_CONTROL_STATUS;
+ dev_vdbg(hsotg->dev,
+ " Control data transfer done\n");
+ } else if (desc_num + 1 == qtd->n_desc) {
+ /*
+ * Last descriptor for Control data stage which
+ * is not completed yet
+ */
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum,
+ qtd);
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static void dwc2_complete_non_isoc_xfer_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ int chnum,
+ enum dwc2_halt_status halt_status)
+{
+ struct list_head *qtd_item, *qtd_tmp;
+ struct dwc2_qh *qh = chan->qh;
+ struct dwc2_qtd *qtd = NULL;
+ int xfer_done;
+ int desc_num = 0;
+
+ if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) {
+ list_for_each_entry(qtd, &qh->qtd_list, qtd_list_entry)
+ qtd->in_process = 0;
+ return;
+ }
+
+ list_for_each_safe(qtd_item, qtd_tmp, &qh->qtd_list) {
+ int i;
+
+ qtd = list_entry(qtd_item, struct dwc2_qtd, qtd_list_entry);
+ xfer_done = 0;
+
+ for (i = 0; i < qtd->n_desc; i++) {
+ if (dwc2_process_non_isoc_desc(hsotg, chan, chnum, qtd,
+ desc_num, halt_status,
+ &xfer_done)) {
+ qtd = NULL;
+ break;
+ }
+ desc_num++;
+ }
+ }
+
+ if (qh->ep_type != USB_ENDPOINT_XFER_CONTROL) {
+ /*
+ * Resetting the data toggle for bulk and interrupt endpoints
+ * in case of stall. See handle_hc_stall_intr().
+ */
+ if (halt_status == DWC2_HC_XFER_STALL)
+ qh->data_toggle = DWC2_HC_PID_DATA0;
+ else if (qtd)
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
+ }
+
+ if (halt_status == DWC2_HC_XFER_COMPLETE) {
+ if (chan->hcint & HCINTMSK_NYET) {
+ /*
+ * Got a NYET on the last transaction of the transfer.
+ * It means that the endpoint should be in the PING
+ * state at the beginning of the next transfer.
+ */
+ qh->ping_state = 1;
+ }
+ }
+}
+
+/**
+ * dwc2_hcd_complete_xfer_ddma() - Scans the descriptor list, updates URB's
+ * status and calls completion routine for the URB if it's done. Called from
+ * interrupt handlers.
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @chan: Host channel the transfer is completed on
+ * @chnum: Index of Host channel registers
+ * @halt_status: Reason the channel is being halted or just XferComplete
+ * for isochronous transfers
+ *
+ * Releases the channel to be used by other transfers.
+ * In case of Isochronous endpoint the channel is not halted until the end of
+ * the session, i.e. QTD list is empty.
+ * If periodic channel released the FrameList is updated accordingly.
+ * Calls transaction selection routines to activate pending transfers.
+ */
+void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ enum dwc2_halt_status halt_status)
+{
+ struct dwc2_qh *qh = chan->qh;
+ int continue_isoc_xfer = 0;
+ enum dwc2_transaction_type tr_type;
+
+ if (chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ dwc2_complete_isoc_xfer_ddma(hsotg, chan, halt_status);
+
+ /* Release the channel if halted or session completed */
+ if (halt_status != DWC2_HC_XFER_COMPLETE ||
+ list_empty(&qh->qtd_list)) {
+ /* Halt the channel if session completed */
+ if (halt_status == DWC2_HC_XFER_COMPLETE)
+ dwc2_hc_halt(hsotg, chan, halt_status);
+ dwc2_release_channel_ddma(hsotg, qh);
+ dwc2_hcd_qh_unlink(hsotg, qh);
+ } else {
+ /* Keep in assigned schedule to continue transfer */
+ list_move(&qh->qh_list_entry,
+ &hsotg->periodic_sched_assigned);
+ continue_isoc_xfer = 1;
+ }
+ /*
+ * Todo: Consider the case when period exceeds FrameList size.
+ * Frame Rollover interrupt should be used.
+ */
+ } else {
+ /*
+ * Scan descriptor list to complete the URB(s), then release
+ * the channel
+ */
+ dwc2_complete_non_isoc_xfer_ddma(hsotg, chan, chnum,
+ halt_status);
+ dwc2_release_channel_ddma(hsotg, qh);
+ dwc2_hcd_qh_unlink(hsotg, qh);
+
+ if (!list_empty(&qh->qtd_list)) {
+ /*
+ * Add back to inactive non-periodic schedule on normal
+ * completion
+ */
+ dwc2_hcd_qh_add(hsotg, qh);
+ }
+ }
+
+ tr_type = dwc2_hcd_select_transactions(hsotg);
+ if (tr_type != DWC2_TRANSACTION_NONE || continue_isoc_xfer) {
+ if (continue_isoc_xfer) {
+ if (tr_type == DWC2_TRANSACTION_NONE)
+ tr_type = DWC2_TRANSACTION_PERIODIC;
+ else if (tr_type == DWC2_TRANSACTION_NON_PERIODIC)
+ tr_type = DWC2_TRANSACTION_ALL;
+ }
+ dwc2_hcd_queue_transactions(hsotg, tr_type);
+ }
+}
--- /dev/null
+/*
+ * hcd_intr.c - DesignWare HS OTG Controller host-mode interrupt handling
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file contains the interrupt handlers for Host mode
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <linux/usb/hcd.h>
+#include <linux/usb/ch11.h>
+
+#include "core.h"
+#include "hcd.h"
+
+/* This function is for debug only */
+static void dwc2_track_missed_sofs(struct dwc2_hsotg *hsotg)
+{
+#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
+ u16 curr_frame_number = hsotg->frame_number;
+
+ if (hsotg->frame_num_idx < FRAME_NUM_ARRAY_SIZE) {
+ if (((hsotg->last_frame_num + 1) & HFNUM_MAX_FRNUM) !=
+ curr_frame_number) {
+ hsotg->frame_num_array[hsotg->frame_num_idx] =
+ curr_frame_number;
+ hsotg->last_frame_num_array[hsotg->frame_num_idx] =
+ hsotg->last_frame_num;
+ hsotg->frame_num_idx++;
+ }
+ } else if (!hsotg->dumped_frame_num_array) {
+ int i;
+
+ dev_info(hsotg->dev, "Frame Last Frame\n");
+ dev_info(hsotg->dev, "----- ----------\n");
+ for (i = 0; i < FRAME_NUM_ARRAY_SIZE; i++) {
+ dev_info(hsotg->dev, "0x%04x 0x%04x\n",
+ hsotg->frame_num_array[i],
+ hsotg->last_frame_num_array[i]);
+ }
+ hsotg->dumped_frame_num_array = 1;
+ }
+ hsotg->last_frame_num = curr_frame_number;
+#endif
+}
+
+static void dwc2_hc_handle_tt_clear(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ struct dwc2_qtd *qtd)
+{
+ struct urb *usb_urb;
+
+ if (!chan->qh)
+ return;
+
+ if (chan->qh->dev_speed == USB_SPEED_HIGH)
+ return;
+
+ if (!qtd->urb)
+ return;
+
+ usb_urb = qtd->urb->priv;
+ if (!usb_urb || !usb_urb->dev || !usb_urb->dev->tt)
+ return;
+
+ if (qtd->urb->status != -EPIPE && qtd->urb->status != -EREMOTEIO) {
+ chan->qh->tt_buffer_dirty = 1;
+ if (usb_hub_clear_tt_buffer(usb_urb))
+ /* Clear failed; let's hope things work anyway */
+ chan->qh->tt_buffer_dirty = 0;
+ }
+}
+
+/*
+ * Handles the start-of-frame interrupt in host mode. Non-periodic
+ * transactions may be queued to the DWC_otg controller for the current
+ * (micro)frame. Periodic transactions may be queued to the controller
+ * for the next (micro)frame.
+ */
+static void dwc2_sof_intr(struct dwc2_hsotg *hsotg)
+{
+ struct list_head *qh_entry;
+ struct dwc2_qh *qh;
+ enum dwc2_transaction_type tr_type;
+
+#ifdef DEBUG_SOF
+ dev_vdbg(hsotg->dev, "--Start of Frame Interrupt--\n");
+#endif
+
+ hsotg->frame_number = dwc2_hcd_get_frame_number(hsotg);
+
+ dwc2_track_missed_sofs(hsotg);
+
+ /* Determine whether any periodic QHs should be executed */
+ qh_entry = hsotg->periodic_sched_inactive.next;
+ while (qh_entry != &hsotg->periodic_sched_inactive) {
+ qh = list_entry(qh_entry, struct dwc2_qh, qh_list_entry);
+ qh_entry = qh_entry->next;
+ if (dwc2_frame_num_le(qh->sched_frame, hsotg->frame_number))
+ /*
+ * Move QH to the ready list to be executed next
+ * (micro)frame
+ */
+ list_move(&qh->qh_list_entry,
+ &hsotg->periodic_sched_ready);
+ }
+ tr_type = dwc2_hcd_select_transactions(hsotg);
+ if (tr_type != DWC2_TRANSACTION_NONE)
+ dwc2_hcd_queue_transactions(hsotg, tr_type);
+
+ /* Clear interrupt */
+ writel(GINTSTS_SOF, hsotg->regs + GINTSTS);
+}
+
+/*
+ * Handles the Rx FIFO Level Interrupt, which indicates that there is
+ * at least one packet in the Rx FIFO. The packets are moved from the FIFO to
+ * memory if the DWC_otg controller is operating in Slave mode.
+ */
+static void dwc2_rx_fifo_level_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 grxsts, chnum, bcnt, dpid, pktsts;
+ struct dwc2_host_chan *chan;
+
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, "--RxFIFO Level Interrupt--\n");
+
+ grxsts = readl(hsotg->regs + GRXSTSP);
+ chnum = (grxsts & GRXSTS_HCHNUM_MASK) >> GRXSTS_HCHNUM_SHIFT;
+ chan = hsotg->hc_ptr_array[chnum];
+ if (!chan) {
+ dev_err(hsotg->dev, "Unable to get corresponding channel\n");
+ return;
+ }
+
+ bcnt = (grxsts & GRXSTS_BYTECNT_MASK) >> GRXSTS_BYTECNT_SHIFT;
+ dpid = (grxsts & GRXSTS_DPID_MASK) >> GRXSTS_DPID_SHIFT;
+ pktsts = (grxsts & GRXSTS_PKTSTS_MASK) >> GRXSTS_PKTSTS_SHIFT;
+
+ /* Packet Status */
+ if (dbg_perio()) {
+ dev_vdbg(hsotg->dev, " Ch num = %d\n", chnum);
+ dev_vdbg(hsotg->dev, " Count = %d\n", bcnt);
+ dev_vdbg(hsotg->dev, " DPID = %d, chan.dpid = %d\n", dpid,
+ chan->data_pid_start);
+ dev_vdbg(hsotg->dev, " PStatus = %d\n", pktsts);
+ }
+
+ switch (pktsts) {
+ case GRXSTS_PKTSTS_HCHIN:
+ /* Read the data into the host buffer */
+ if (bcnt > 0) {
+ dwc2_read_packet(hsotg, chan->xfer_buf, bcnt);
+
+ /* Update the HC fields for the next packet received */
+ chan->xfer_count += bcnt;
+ chan->xfer_buf += bcnt;
+ }
+ break;
+ case GRXSTS_PKTSTS_HCHIN_XFER_COMP:
+ case GRXSTS_PKTSTS_DATATOGGLEERR:
+ case GRXSTS_PKTSTS_HCHHALTED:
+ /* Handled in interrupt, just ignore data */
+ break;
+ default:
+ dev_err(hsotg->dev,
+ "RxFIFO Level Interrupt: Unknown status %d\n", pktsts);
+ break;
+ }
+}
+
+/*
+ * This interrupt occurs when the non-periodic Tx FIFO is half-empty. More
+ * data packets may be written to the FIFO for OUT transfers. More requests
+ * may be written to the non-periodic request queue for IN transfers. This
+ * interrupt is enabled only in Slave mode.
+ */
+static void dwc2_np_tx_fifo_empty_intr(struct dwc2_hsotg *hsotg)
+{
+ dev_vdbg(hsotg->dev, "--Non-Periodic TxFIFO Empty Interrupt--\n");
+ dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_NON_PERIODIC);
+}
+
+/*
+ * This interrupt occurs when the periodic Tx FIFO is half-empty. More data
+ * packets may be written to the FIFO for OUT transfers. More requests may be
+ * written to the periodic request queue for IN transfers. This interrupt is
+ * enabled only in Slave mode.
+ */
+static void dwc2_perio_tx_fifo_empty_intr(struct dwc2_hsotg *hsotg)
+{
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, "--Periodic TxFIFO Empty Interrupt--\n");
+ dwc2_hcd_queue_transactions(hsotg, DWC2_TRANSACTION_PERIODIC);
+}
+
+static void dwc2_hprt0_enable(struct dwc2_hsotg *hsotg, u32 hprt0,
+ u32 *hprt0_modify)
+{
+ struct dwc2_core_params *params = hsotg->core_params;
+ int do_reset = 0;
+ u32 usbcfg;
+ u32 prtspd;
+ u32 hcfg;
+ u32 fslspclksel;
+ u32 hfir;
+
+ dev_vdbg(hsotg->dev, "%s(%p)\n", __func__, hsotg);
+
+ /* Every time when port enables calculate HFIR.FrInterval */
+ hfir = readl(hsotg->regs + HFIR);
+ hfir &= ~HFIR_FRINT_MASK;
+ hfir |= dwc2_calc_frame_interval(hsotg) << HFIR_FRINT_SHIFT &
+ HFIR_FRINT_MASK;
+ writel(hfir, hsotg->regs + HFIR);
+
+ /* Check if we need to adjust the PHY clock speed for low power */
+ if (!params->host_support_fs_ls_low_power) {
+ /* Port has been enabled, set the reset change flag */
+ hsotg->flags.b.port_reset_change = 1;
+ return;
+ }
+
+ usbcfg = readl(hsotg->regs + GUSBCFG);
+ prtspd = (hprt0 & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
+
+ if (prtspd == HPRT0_SPD_LOW_SPEED || prtspd == HPRT0_SPD_FULL_SPEED) {
+ /* Low power */
+ if (!(usbcfg & GUSBCFG_PHY_LP_CLK_SEL)) {
+ /* Set PHY low power clock select for FS/LS devices */
+ usbcfg |= GUSBCFG_PHY_LP_CLK_SEL;
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+ do_reset = 1;
+ }
+
+ hcfg = readl(hsotg->regs + HCFG);
+ fslspclksel = (hcfg & HCFG_FSLSPCLKSEL_MASK) >>
+ HCFG_FSLSPCLKSEL_SHIFT;
+
+ if (prtspd == HPRT0_SPD_LOW_SPEED &&
+ params->host_ls_low_power_phy_clk ==
+ DWC2_HOST_LS_LOW_POWER_PHY_CLK_PARAM_6MHZ) {
+ /* 6 MHZ */
+ dev_vdbg(hsotg->dev,
+ "FS_PHY programming HCFG to 6 MHz\n");
+ if (fslspclksel != HCFG_FSLSPCLKSEL_6_MHZ) {
+ fslspclksel = HCFG_FSLSPCLKSEL_6_MHZ;
+ hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
+ hcfg |= fslspclksel << HCFG_FSLSPCLKSEL_SHIFT;
+ writel(hcfg, hsotg->regs + HCFG);
+ do_reset = 1;
+ }
+ } else {
+ /* 48 MHZ */
+ dev_vdbg(hsotg->dev,
+ "FS_PHY programming HCFG to 48 MHz\n");
+ if (fslspclksel != HCFG_FSLSPCLKSEL_48_MHZ) {
+ fslspclksel = HCFG_FSLSPCLKSEL_48_MHZ;
+ hcfg &= ~HCFG_FSLSPCLKSEL_MASK;
+ hcfg |= fslspclksel << HCFG_FSLSPCLKSEL_SHIFT;
+ writel(hcfg, hsotg->regs + HCFG);
+ do_reset = 1;
+ }
+ }
+ } else {
+ /* Not low power */
+ if (usbcfg & GUSBCFG_PHY_LP_CLK_SEL) {
+ usbcfg &= ~GUSBCFG_PHY_LP_CLK_SEL;
+ writel(usbcfg, hsotg->regs + GUSBCFG);
+ do_reset = 1;
+ }
+ }
+
+ if (do_reset) {
+ *hprt0_modify |= HPRT0_RST;
+ queue_delayed_work(hsotg->wq_otg, &hsotg->reset_work,
+ msecs_to_jiffies(60));
+ } else {
+ /* Port has been enabled, set the reset change flag */
+ hsotg->flags.b.port_reset_change = 1;
+ }
+}
+
+/*
+ * There are multiple conditions that can cause a port interrupt. This function
+ * determines which interrupt conditions have occurred and handles them
+ * appropriately.
+ */
+static void dwc2_port_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 hprt0;
+ u32 hprt0_modify;
+
+ dev_vdbg(hsotg->dev, "--Port Interrupt--\n");
+
+ hprt0 = readl(hsotg->regs + HPRT0);
+ hprt0_modify = hprt0;
+
+ /*
+ * Clear appropriate bits in HPRT0 to clear the interrupt bit in
+ * GINTSTS
+ */
+ hprt0_modify &= ~(HPRT0_ENA | HPRT0_CONNDET | HPRT0_ENACHG |
+ HPRT0_OVRCURRCHG);
+
+ /*
+ * Port Connect Detected
+ * Set flag and clear if detected
+ */
+ if (hprt0 & HPRT0_CONNDET) {
+ dev_vdbg(hsotg->dev,
+ "--Port Interrupt HPRT0=0x%08x Port Connect Detected--\n",
+ hprt0);
+ hsotg->flags.b.port_connect_status_change = 1;
+ hsotg->flags.b.port_connect_status = 1;
+ hprt0_modify |= HPRT0_CONNDET;
+
+ /*
+ * The Hub driver asserts a reset when it sees port connect
+ * status change flag
+ */
+ }
+
+ /*
+ * Port Enable Changed
+ * Clear if detected - Set internal flag if disabled
+ */
+ if (hprt0 & HPRT0_ENACHG) {
+ dev_vdbg(hsotg->dev,
+ " --Port Interrupt HPRT0=0x%08x Port Enable Changed (now %d)--\n",
+ hprt0, !!(hprt0 & HPRT0_ENA));
+ hprt0_modify |= HPRT0_ENACHG;
+ if (hprt0 & HPRT0_ENA)
+ dwc2_hprt0_enable(hsotg, hprt0, &hprt0_modify);
+ else
+ hsotg->flags.b.port_enable_change = 1;
+ }
+
+ /* Overcurrent Change Interrupt */
+ if (hprt0 & HPRT0_OVRCURRCHG) {
+ dev_vdbg(hsotg->dev,
+ " --Port Interrupt HPRT0=0x%08x Port Overcurrent Changed--\n",
+ hprt0);
+ hsotg->flags.b.port_over_current_change = 1;
+ hprt0_modify |= HPRT0_OVRCURRCHG;
+ }
+
+ /* Clear Port Interrupts */
+ writel(hprt0_modify, hsotg->regs + HPRT0);
+}
+
+/*
+ * Gets the actual length of a transfer after the transfer halts. halt_status
+ * holds the reason for the halt.
+ *
+ * For IN transfers where halt_status is DWC2_HC_XFER_COMPLETE, *short_read
+ * is set to 1 upon return if less than the requested number of bytes were
+ * transferred. short_read may also be NULL on entry, in which case it remains
+ * unchanged.
+ */
+static u32 dwc2_get_actual_xfer_length(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd,
+ enum dwc2_halt_status halt_status,
+ int *short_read)
+{
+ u32 hctsiz, count, length;
+
+ hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
+
+ if (halt_status == DWC2_HC_XFER_COMPLETE) {
+ if (chan->ep_is_in) {
+ count = (hctsiz & TSIZ_XFERSIZE_MASK) >>
+ TSIZ_XFERSIZE_SHIFT;
+ length = chan->xfer_len - count;
+ if (short_read != NULL)
+ *short_read = (count != 0);
+ } else if (chan->qh->do_split) {
+ length = qtd->ssplit_out_xfer_count;
+ } else {
+ length = chan->xfer_len;
+ }
+ } else {
+ /*
+ * Must use the hctsiz.pktcnt field to determine how much data
+ * has been transferred. This field reflects the number of
+ * packets that have been transferred via the USB. This is
+ * always an integral number of packets if the transfer was
+ * halted before its normal completion. (Can't use the
+ * hctsiz.xfersize field because that reflects the number of
+ * bytes transferred via the AHB, not the USB).
+ */
+ count = (hctsiz & TSIZ_PKTCNT_MASK) >> TSIZ_PKTCNT_SHIFT;
+ length = (chan->start_pkt_count - count) * chan->max_packet;
+ }
+
+ return length;
+}
+
+/**
+ * dwc2_update_urb_state() - Updates the state of the URB after a Transfer
+ * Complete interrupt on the host channel. Updates the actual_length field
+ * of the URB based on the number of bytes transferred via the host channel.
+ * Sets the URB status if the data transfer is finished.
+ *
+ * Return: 1 if the data transfer specified by the URB is completely finished,
+ * 0 otherwise
+ */
+static int dwc2_update_urb_state(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_hcd_urb *urb,
+ struct dwc2_qtd *qtd)
+{
+ u32 hctsiz;
+ int xfer_done = 0;
+ int short_read = 0;
+ int xfer_length = dwc2_get_actual_xfer_length(hsotg, chan, chnum, qtd,
+ DWC2_HC_XFER_COMPLETE,
+ &short_read);
+
+ if (urb->actual_length + xfer_length > urb->length) {
+ dev_warn(hsotg->dev, "%s(): trimming xfer length\n", __func__);
+ xfer_length = urb->length - urb->actual_length;
+ }
+
+ /* Non DWORD-aligned buffer case handling */
+ if (chan->align_buf && xfer_length && chan->ep_is_in) {
+ dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
+ dma_sync_single_for_cpu(hsotg->dev, urb->dma, urb->length,
+ DMA_FROM_DEVICE);
+ memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf,
+ xfer_length);
+ dma_sync_single_for_device(hsotg->dev, urb->dma, urb->length,
+ DMA_FROM_DEVICE);
+ }
+
+ dev_vdbg(hsotg->dev, "urb->actual_length=%d xfer_length=%d\n",
+ urb->actual_length, xfer_length);
+ urb->actual_length += xfer_length;
+
+ if (xfer_length && chan->ep_type == USB_ENDPOINT_XFER_BULK &&
+ (urb->flags & URB_SEND_ZERO_PACKET) &&
+ urb->actual_length >= urb->length &&
+ !(urb->length % chan->max_packet)) {
+ xfer_done = 0;
+ } else if (short_read || urb->actual_length >= urb->length) {
+ xfer_done = 1;
+ urb->status = 0;
+ }
+
+ hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
+ dev_vdbg(hsotg->dev, "DWC_otg: %s: %s, channel %d\n",
+ __func__, (chan->ep_is_in ? "IN" : "OUT"), chnum);
+ dev_vdbg(hsotg->dev, " chan->xfer_len %d\n", chan->xfer_len);
+ dev_vdbg(hsotg->dev, " hctsiz.xfersize %d\n",
+ (hctsiz & TSIZ_XFERSIZE_MASK) >> TSIZ_XFERSIZE_SHIFT);
+ dev_vdbg(hsotg->dev, " urb->transfer_buffer_length %d\n", urb->length);
+ dev_vdbg(hsotg->dev, " urb->actual_length %d\n", urb->actual_length);
+ dev_vdbg(hsotg->dev, " short_read %d, xfer_done %d\n", short_read,
+ xfer_done);
+
+ return xfer_done;
+}
+
+/*
+ * Save the starting data toggle for the next transfer. The data toggle is
+ * saved in the QH for non-control transfers and it's saved in the QTD for
+ * control transfers.
+ */
+void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ u32 hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
+ u32 pid = (hctsiz & TSIZ_SC_MC_PID_MASK) >> TSIZ_SC_MC_PID_SHIFT;
+
+ if (chan->ep_type != USB_ENDPOINT_XFER_CONTROL) {
+ if (pid == TSIZ_SC_MC_PID_DATA0)
+ chan->qh->data_toggle = DWC2_HC_PID_DATA0;
+ else
+ chan->qh->data_toggle = DWC2_HC_PID_DATA1;
+ } else {
+ if (pid == TSIZ_SC_MC_PID_DATA0)
+ qtd->data_toggle = DWC2_HC_PID_DATA0;
+ else
+ qtd->data_toggle = DWC2_HC_PID_DATA1;
+ }
+}
+
+/**
+ * dwc2_update_isoc_urb_state() - Updates the state of an Isochronous URB when
+ * the transfer is stopped for any reason. The fields of the current entry in
+ * the frame descriptor array are set based on the transfer state and the input
+ * halt_status. Completes the Isochronous URB if all the URB frames have been
+ * completed.
+ *
+ * Return: DWC2_HC_XFER_COMPLETE if there are more frames remaining to be
+ * transferred in the URB. Otherwise return DWC2_HC_XFER_URB_COMPLETE.
+ */
+static enum dwc2_halt_status dwc2_update_isoc_urb_state(
+ struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
+ int chnum, struct dwc2_qtd *qtd,
+ enum dwc2_halt_status halt_status)
+{
+ struct dwc2_hcd_iso_packet_desc *frame_desc;
+ struct dwc2_hcd_urb *urb = qtd->urb;
+
+ if (!urb)
+ return DWC2_HC_XFER_NO_HALT_STATUS;
+
+ frame_desc = &urb->iso_descs[qtd->isoc_frame_index];
+
+ switch (halt_status) {
+ case DWC2_HC_XFER_COMPLETE:
+ frame_desc->status = 0;
+ frame_desc->actual_length = dwc2_get_actual_xfer_length(hsotg,
+ chan, chnum, qtd, halt_status, NULL);
+
+ /* Non DWORD-aligned buffer case handling */
+ if (chan->align_buf && frame_desc->actual_length &&
+ chan->ep_is_in) {
+ dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n",
+ __func__);
+ dma_sync_single_for_cpu(hsotg->dev, urb->dma,
+ urb->length, DMA_FROM_DEVICE);
+ memcpy(urb->buf + frame_desc->offset +
+ qtd->isoc_split_offset, chan->qh->dw_align_buf,
+ frame_desc->actual_length);
+ dma_sync_single_for_device(hsotg->dev, urb->dma,
+ urb->length,
+ DMA_FROM_DEVICE);
+ }
+ break;
+ case DWC2_HC_XFER_FRAME_OVERRUN:
+ urb->error_count++;
+ if (chan->ep_is_in)
+ frame_desc->status = -ENOSR;
+ else
+ frame_desc->status = -ECOMM;
+ frame_desc->actual_length = 0;
+ break;
+ case DWC2_HC_XFER_BABBLE_ERR:
+ urb->error_count++;
+ frame_desc->status = -EOVERFLOW;
+ /* Don't need to update actual_length in this case */
+ break;
+ case DWC2_HC_XFER_XACT_ERR:
+ urb->error_count++;
+ frame_desc->status = -EPROTO;
+ frame_desc->actual_length = dwc2_get_actual_xfer_length(hsotg,
+ chan, chnum, qtd, halt_status, NULL);
+
+ /* Non DWORD-aligned buffer case handling */
+ if (chan->align_buf && frame_desc->actual_length &&
+ chan->ep_is_in) {
+ dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n",
+ __func__);
+ dma_sync_single_for_cpu(hsotg->dev, urb->dma,
+ urb->length, DMA_FROM_DEVICE);
+ memcpy(urb->buf + frame_desc->offset +
+ qtd->isoc_split_offset, chan->qh->dw_align_buf,
+ frame_desc->actual_length);
+ dma_sync_single_for_device(hsotg->dev, urb->dma,
+ urb->length,
+ DMA_FROM_DEVICE);
+ }
+
+ /* Skip whole frame */
+ if (chan->qh->do_split &&
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in &&
+ hsotg->core_params->dma_enable > 0) {
+ qtd->complete_split = 0;
+ qtd->isoc_split_offset = 0;
+ }
+
+ break;
+ default:
+ dev_err(hsotg->dev, "Unhandled halt_status (%d)\n",
+ halt_status);
+ break;
+ }
+
+ if (++qtd->isoc_frame_index == urb->packet_count) {
+ /*
+ * urb->status is not used for isoc transfers. The individual
+ * frame_desc statuses are used instead.
+ */
+ dwc2_host_complete(hsotg, qtd, 0);
+ halt_status = DWC2_HC_XFER_URB_COMPLETE;
+ } else {
+ halt_status = DWC2_HC_XFER_COMPLETE;
+ }
+
+ return halt_status;
+}
+
+/*
+ * Frees the first QTD in the QH's list if free_qtd is 1. For non-periodic
+ * QHs, removes the QH from the active non-periodic schedule. If any QTDs are
+ * still linked to the QH, the QH is added to the end of the inactive
+ * non-periodic schedule. For periodic QHs, removes the QH from the periodic
+ * schedule if no more QTDs are linked to the QH.
+ */
+static void dwc2_deactivate_qh(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ int free_qtd)
+{
+ int continue_split = 0;
+ struct dwc2_qtd *qtd;
+
+ if (dbg_qh(qh))
+ dev_vdbg(hsotg->dev, " %s(%p,%p,%d)\n", __func__,
+ hsotg, qh, free_qtd);
+
+ if (list_empty(&qh->qtd_list)) {
+ dev_dbg(hsotg->dev, "## QTD list empty ##\n");
+ goto no_qtd;
+ }
+
+ qtd = list_first_entry(&qh->qtd_list, struct dwc2_qtd, qtd_list_entry);
+
+ if (qtd->complete_split)
+ continue_split = 1;
+ else if (qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_MID ||
+ qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_END)
+ continue_split = 1;
+
+ if (free_qtd) {
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd, qh);
+ continue_split = 0;
+ }
+
+no_qtd:
+ if (qh->channel)
+ qh->channel->align_buf = 0;
+ qh->channel = NULL;
+ dwc2_hcd_qh_deactivate(hsotg, qh, continue_split);
+}
+
+/**
+ * dwc2_release_channel() - Releases a host channel for use by other transfers
+ *
+ * @hsotg: The HCD state structure
+ * @chan: The host channel to release
+ * @qtd: The QTD associated with the host channel. This QTD may be
+ * freed if the transfer is complete or an error has occurred.
+ * @halt_status: Reason the channel is being released. This status
+ * determines the actions taken by this function.
+ *
+ * Also attempts to select and queue more transactions since at least one host
+ * channel is available.
+ */
+static void dwc2_release_channel(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ struct dwc2_qtd *qtd,
+ enum dwc2_halt_status halt_status)
+{
+ enum dwc2_transaction_type tr_type;
+ u32 haintmsk;
+ int free_qtd = 0;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, " %s: channel %d, halt_status %d\n",
+ __func__, chan->hc_num, halt_status);
+
+ switch (halt_status) {
+ case DWC2_HC_XFER_URB_COMPLETE:
+ free_qtd = 1;
+ break;
+ case DWC2_HC_XFER_AHB_ERR:
+ case DWC2_HC_XFER_STALL:
+ case DWC2_HC_XFER_BABBLE_ERR:
+ free_qtd = 1;
+ break;
+ case DWC2_HC_XFER_XACT_ERR:
+ if (qtd && qtd->error_count >= 3) {
+ dev_vdbg(hsotg->dev,
+ " Complete URB with transaction error\n");
+ free_qtd = 1;
+ dwc2_host_complete(hsotg, qtd, -EPROTO);
+ }
+ break;
+ case DWC2_HC_XFER_URB_DEQUEUE:
+ /*
+ * The QTD has already been removed and the QH has been
+ * deactivated. Don't want to do anything except release the
+ * host channel and try to queue more transfers.
+ */
+ goto cleanup;
+ case DWC2_HC_XFER_PERIODIC_INCOMPLETE:
+ dev_vdbg(hsotg->dev, " Complete URB with I/O error\n");
+ free_qtd = 1;
+ dwc2_host_complete(hsotg, qtd, -EIO);
+ break;
+ case DWC2_HC_XFER_NO_HALT_STATUS:
+ default:
+ break;
+ }
+
+ dwc2_deactivate_qh(hsotg, chan->qh, free_qtd);
+
+cleanup:
+ /*
+ * Release the host channel for use by other transfers. The cleanup
+ * function clears the channel interrupt enables and conditions, so
+ * there's no need to clear the Channel Halted interrupt separately.
+ */
+ if (!list_empty(&chan->hc_list_entry))
+ list_del(&chan->hc_list_entry);
+ dwc2_hc_cleanup(hsotg, chan);
+ list_add_tail(&chan->hc_list_entry, &hsotg->free_hc_list);
+
+ if (hsotg->core_params->uframe_sched > 0) {
+ hsotg->available_host_channels++;
+ } else {
+ switch (chan->ep_type) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ case USB_ENDPOINT_XFER_BULK:
+ hsotg->non_periodic_channels--;
+ break;
+ default:
+ /*
+ * Don't release reservations for periodic channels
+ * here. That's done when a periodic transfer is
+ * descheduled (i.e. when the QH is removed from the
+ * periodic schedule).
+ */
+ break;
+ }
+ }
+
+ haintmsk = readl(hsotg->regs + HAINTMSK);
+ haintmsk &= ~(1 << chan->hc_num);
+ writel(haintmsk, hsotg->regs + HAINTMSK);
+
+ /* Try to queue more transfers now that there's a free channel */
+ tr_type = dwc2_hcd_select_transactions(hsotg);
+ if (tr_type != DWC2_TRANSACTION_NONE)
+ dwc2_hcd_queue_transactions(hsotg, tr_type);
+}
+
+/*
+ * Halts a host channel. If the channel cannot be halted immediately because
+ * the request queue is full, this function ensures that the FIFO empty
+ * interrupt for the appropriate queue is enabled so that the halt request can
+ * be queued when there is space in the request queue.
+ *
+ * This function may also be called in DMA mode. In that case, the channel is
+ * simply released since the core always halts the channel automatically in
+ * DMA mode.
+ */
+static void dwc2_halt_channel(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, struct dwc2_qtd *qtd,
+ enum dwc2_halt_status halt_status)
+{
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ if (hsotg->core_params->dma_enable > 0) {
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "DMA enabled\n");
+ dwc2_release_channel(hsotg, chan, qtd, halt_status);
+ return;
+ }
+
+ /* Slave mode processing */
+ dwc2_hc_halt(hsotg, chan, halt_status);
+
+ if (chan->halt_on_queue) {
+ u32 gintmsk;
+
+ dev_vdbg(hsotg->dev, "Halt on queue\n");
+ if (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
+ chan->ep_type == USB_ENDPOINT_XFER_BULK) {
+ dev_vdbg(hsotg->dev, "control/bulk\n");
+ /*
+ * Make sure the Non-periodic Tx FIFO empty interrupt
+ * is enabled so that the non-periodic schedule will
+ * be processed
+ */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk |= GINTSTS_NPTXFEMP;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ } else {
+ dev_vdbg(hsotg->dev, "isoc/intr\n");
+ /*
+ * Move the QH from the periodic queued schedule to
+ * the periodic assigned schedule. This allows the
+ * halt to be queued when the periodic schedule is
+ * processed.
+ */
+ list_move(&chan->qh->qh_list_entry,
+ &hsotg->periodic_sched_assigned);
+
+ /*
+ * Make sure the Periodic Tx FIFO Empty interrupt is
+ * enabled so that the periodic schedule will be
+ * processed
+ */
+ gintmsk = readl(hsotg->regs + GINTMSK);
+ gintmsk |= GINTSTS_PTXFEMP;
+ writel(gintmsk, hsotg->regs + GINTMSK);
+ }
+ }
+}
+
+/*
+ * Performs common cleanup for non-periodic transfers after a Transfer
+ * Complete interrupt. This function should be called after any endpoint type
+ * specific handling is finished to release the host channel.
+ */
+static void dwc2_complete_non_periodic_xfer(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan,
+ int chnum, struct dwc2_qtd *qtd,
+ enum dwc2_halt_status halt_status)
+{
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ qtd->error_count = 0;
+
+ if (chan->hcint & HCINTMSK_NYET) {
+ /*
+ * Got a NYET on the last transaction of the transfer. This
+ * means that the endpoint should be in the PING state at the
+ * beginning of the next transfer.
+ */
+ dev_vdbg(hsotg->dev, "got NYET\n");
+ chan->qh->ping_state = 1;
+ }
+
+ /*
+ * Always halt and release the host channel to make it available for
+ * more transfers. There may still be more phases for a control
+ * transfer or more data packets for a bulk transfer at this point,
+ * but the host channel is still halted. A channel will be reassigned
+ * to the transfer when the non-periodic schedule is processed after
+ * the channel is released. This allows transactions to be queued
+ * properly via dwc2_hcd_queue_transactions, which also enables the
+ * Tx FIFO Empty interrupt if necessary.
+ */
+ if (chan->ep_is_in) {
+ /*
+ * IN transfers in Slave mode require an explicit disable to
+ * halt the channel. (In DMA mode, this call simply releases
+ * the channel.)
+ */
+ dwc2_halt_channel(hsotg, chan, qtd, halt_status);
+ } else {
+ /*
+ * The channel is automatically disabled by the core for OUT
+ * transfers in Slave mode
+ */
+ dwc2_release_channel(hsotg, chan, qtd, halt_status);
+ }
+}
+
+/*
+ * Performs common cleanup for periodic transfers after a Transfer Complete
+ * interrupt. This function should be called after any endpoint type specific
+ * handling is finished to release the host channel.
+ */
+static void dwc2_complete_periodic_xfer(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd,
+ enum dwc2_halt_status halt_status)
+{
+ u32 hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
+
+ qtd->error_count = 0;
+
+ if (!chan->ep_is_in || (hctsiz & TSIZ_PKTCNT_MASK) == 0)
+ /* Core halts channel in these cases */
+ dwc2_release_channel(hsotg, chan, qtd, halt_status);
+ else
+ /* Flush any outstanding requests from the Tx queue */
+ dwc2_halt_channel(hsotg, chan, qtd, halt_status);
+}
+
+static int dwc2_xfercomp_isoc_split_in(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ struct dwc2_hcd_iso_packet_desc *frame_desc;
+ u32 len;
+
+ if (!qtd->urb)
+ return 0;
+
+ frame_desc = &qtd->urb->iso_descs[qtd->isoc_frame_index];
+ len = dwc2_get_actual_xfer_length(hsotg, chan, chnum, qtd,
+ DWC2_HC_XFER_COMPLETE, NULL);
+ if (!len) {
+ qtd->complete_split = 0;
+ qtd->isoc_split_offset = 0;
+ return 0;
+ }
+
+ frame_desc->actual_length += len;
+
+ if (chan->align_buf) {
+ dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
+ dma_sync_single_for_cpu(hsotg->dev, qtd->urb->dma,
+ qtd->urb->length, DMA_FROM_DEVICE);
+ memcpy(qtd->urb->buf + frame_desc->offset +
+ qtd->isoc_split_offset, chan->qh->dw_align_buf, len);
+ dma_sync_single_for_device(hsotg->dev, qtd->urb->dma,
+ qtd->urb->length, DMA_FROM_DEVICE);
+ }
+
+ qtd->isoc_split_offset += len;
+
+ if (frame_desc->actual_length >= frame_desc->length) {
+ frame_desc->status = 0;
+ qtd->isoc_frame_index++;
+ qtd->complete_split = 0;
+ qtd->isoc_split_offset = 0;
+ }
+
+ if (qtd->isoc_frame_index == qtd->urb->packet_count) {
+ dwc2_host_complete(hsotg, qtd, 0);
+ dwc2_release_channel(hsotg, chan, qtd,
+ DWC2_HC_XFER_URB_COMPLETE);
+ } else {
+ dwc2_release_channel(hsotg, chan, qtd,
+ DWC2_HC_XFER_NO_HALT_STATUS);
+ }
+
+ return 1; /* Indicates that channel released */
+}
+
+/*
+ * Handles a host channel Transfer Complete interrupt. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static void dwc2_hc_xfercomp_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ struct dwc2_hcd_urb *urb = qtd->urb;
+ int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
+ enum dwc2_halt_status halt_status = DWC2_HC_XFER_COMPLETE;
+ int urb_xfer_done;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev,
+ "--Host Channel %d Interrupt: Transfer Complete--\n",
+ chnum);
+
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum, halt_status);
+ if (pipe_type == USB_ENDPOINT_XFER_ISOC)
+ /* Do not disable the interrupt, just clear it */
+ return;
+ goto handle_xfercomp_done;
+ }
+
+ /* Handle xfer complete on CSPLIT */
+ if (chan->qh->do_split) {
+ if (chan->ep_type == USB_ENDPOINT_XFER_ISOC && chan->ep_is_in &&
+ hsotg->core_params->dma_enable > 0) {
+ if (qtd->complete_split &&
+ dwc2_xfercomp_isoc_split_in(hsotg, chan, chnum,
+ qtd))
+ goto handle_xfercomp_done;
+ } else {
+ qtd->complete_split = 0;
+ }
+ }
+
+ if (!urb)
+ goto handle_xfercomp_done;
+
+ /* Update the QTD and URB states */
+ switch (pipe_type) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ switch (qtd->control_phase) {
+ case DWC2_CONTROL_SETUP:
+ if (urb->length > 0)
+ qtd->control_phase = DWC2_CONTROL_DATA;
+ else
+ qtd->control_phase = DWC2_CONTROL_STATUS;
+ dev_vdbg(hsotg->dev,
+ " Control setup transaction done\n");
+ halt_status = DWC2_HC_XFER_COMPLETE;
+ break;
+ case DWC2_CONTROL_DATA:
+ urb_xfer_done = dwc2_update_urb_state(hsotg, chan,
+ chnum, urb, qtd);
+ if (urb_xfer_done) {
+ qtd->control_phase = DWC2_CONTROL_STATUS;
+ dev_vdbg(hsotg->dev,
+ " Control data transfer done\n");
+ } else {
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum,
+ qtd);
+ }
+ halt_status = DWC2_HC_XFER_COMPLETE;
+ break;
+ case DWC2_CONTROL_STATUS:
+ dev_vdbg(hsotg->dev, " Control transfer complete\n");
+ if (urb->status == -EINPROGRESS)
+ urb->status = 0;
+ dwc2_host_complete(hsotg, qtd, urb->status);
+ halt_status = DWC2_HC_XFER_URB_COMPLETE;
+ break;
+ }
+
+ dwc2_complete_non_periodic_xfer(hsotg, chan, chnum, qtd,
+ halt_status);
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ dev_vdbg(hsotg->dev, " Bulk transfer complete\n");
+ urb_xfer_done = dwc2_update_urb_state(hsotg, chan, chnum, urb,
+ qtd);
+ if (urb_xfer_done) {
+ dwc2_host_complete(hsotg, qtd, urb->status);
+ halt_status = DWC2_HC_XFER_URB_COMPLETE;
+ } else {
+ halt_status = DWC2_HC_XFER_COMPLETE;
+ }
+
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
+ dwc2_complete_non_periodic_xfer(hsotg, chan, chnum, qtd,
+ halt_status);
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ dev_vdbg(hsotg->dev, " Interrupt transfer complete\n");
+ urb_xfer_done = dwc2_update_urb_state(hsotg, chan, chnum, urb,
+ qtd);
+
+ /*
+ * Interrupt URB is done on the first transfer complete
+ * interrupt
+ */
+ if (urb_xfer_done) {
+ dwc2_host_complete(hsotg, qtd, urb->status);
+ halt_status = DWC2_HC_XFER_URB_COMPLETE;
+ } else {
+ halt_status = DWC2_HC_XFER_COMPLETE;
+ }
+
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
+ dwc2_complete_periodic_xfer(hsotg, chan, chnum, qtd,
+ halt_status);
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ if (dbg_perio())
+ dev_vdbg(hsotg->dev, " Isochronous transfer complete\n");
+ if (qtd->isoc_split_pos == DWC2_HCSPLT_XACTPOS_ALL)
+ halt_status = dwc2_update_isoc_urb_state(hsotg, chan,
+ chnum, qtd, DWC2_HC_XFER_COMPLETE);
+ dwc2_complete_periodic_xfer(hsotg, chan, chnum, qtd,
+ halt_status);
+ break;
+ }
+
+handle_xfercomp_done:
+ disable_hc_int(hsotg, chnum, HCINTMSK_XFERCOMPL);
+}
+
+/*
+ * Handles a host channel STALL interrupt. This handler may be called in
+ * either DMA mode or Slave mode.
+ */
+static void dwc2_hc_stall_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ struct dwc2_hcd_urb *urb = qtd->urb;
+ int pipe_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
+
+ dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: STALL Received--\n",
+ chnum);
+
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
+ DWC2_HC_XFER_STALL);
+ goto handle_stall_done;
+ }
+
+ if (!urb)
+ goto handle_stall_halt;
+
+ if (pipe_type == USB_ENDPOINT_XFER_CONTROL)
+ dwc2_host_complete(hsotg, qtd, -EPIPE);
+
+ if (pipe_type == USB_ENDPOINT_XFER_BULK ||
+ pipe_type == USB_ENDPOINT_XFER_INT) {
+ dwc2_host_complete(hsotg, qtd, -EPIPE);
+ /*
+ * USB protocol requires resetting the data toggle for bulk
+ * and interrupt endpoints when a CLEAR_FEATURE(ENDPOINT_HALT)
+ * setup command is issued to the endpoint. Anticipate the
+ * CLEAR_FEATURE command since a STALL has occurred and reset
+ * the data toggle now.
+ */
+ chan->qh->data_toggle = 0;
+ }
+
+handle_stall_halt:
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_STALL);
+
+handle_stall_done:
+ disable_hc_int(hsotg, chnum, HCINTMSK_STALL);
+}
+
+/*
+ * Updates the state of the URB when a transfer has been stopped due to an
+ * abnormal condition before the transfer completes. Modifies the
+ * actual_length field of the URB to reflect the number of bytes that have
+ * actually been transferred via the host channel.
+ */
+static void dwc2_update_urb_state_abn(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_hcd_urb *urb,
+ struct dwc2_qtd *qtd,
+ enum dwc2_halt_status halt_status)
+{
+ u32 xfer_length = dwc2_get_actual_xfer_length(hsotg, chan, chnum,
+ qtd, halt_status, NULL);
+ u32 hctsiz;
+
+ if (urb->actual_length + xfer_length > urb->length) {
+ dev_warn(hsotg->dev, "%s(): trimming xfer length\n", __func__);
+ xfer_length = urb->length - urb->actual_length;
+ }
+
+ /* Non DWORD-aligned buffer case handling */
+ if (chan->align_buf && xfer_length && chan->ep_is_in) {
+ dev_vdbg(hsotg->dev, "%s(): non-aligned buffer\n", __func__);
+ dma_sync_single_for_cpu(hsotg->dev, urb->dma, urb->length,
+ DMA_FROM_DEVICE);
+ memcpy(urb->buf + urb->actual_length, chan->qh->dw_align_buf,
+ xfer_length);
+ dma_sync_single_for_device(hsotg->dev, urb->dma, urb->length,
+ DMA_FROM_DEVICE);
+ }
+
+ urb->actual_length += xfer_length;
+
+ hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
+ dev_vdbg(hsotg->dev, "DWC_otg: %s: %s, channel %d\n",
+ __func__, (chan->ep_is_in ? "IN" : "OUT"), chnum);
+ dev_vdbg(hsotg->dev, " chan->start_pkt_count %d\n",
+ chan->start_pkt_count);
+ dev_vdbg(hsotg->dev, " hctsiz.pktcnt %d\n",
+ (hctsiz & TSIZ_PKTCNT_MASK) >> TSIZ_PKTCNT_SHIFT);
+ dev_vdbg(hsotg->dev, " chan->max_packet %d\n", chan->max_packet);
+ dev_vdbg(hsotg->dev, " bytes_transferred %d\n",
+ xfer_length);
+ dev_vdbg(hsotg->dev, " urb->actual_length %d\n",
+ urb->actual_length);
+ dev_vdbg(hsotg->dev, " urb->transfer_buffer_length %d\n",
+ urb->length);
+}
+
+/*
+ * Handles a host channel NAK interrupt. This handler may be called in either
+ * DMA mode or Slave mode.
+ */
+static void dwc2_hc_nak_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NAK Received--\n",
+ chnum);
+
+ /*
+ * Handle NAK for IN/OUT SSPLIT/CSPLIT transfers, bulk, control, and
+ * interrupt. Re-start the SSPLIT transfer.
+ */
+ if (chan->do_split) {
+ if (chan->complete_split)
+ qtd->error_count = 0;
+ qtd->complete_split = 0;
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK);
+ goto handle_nak_done;
+ }
+
+ switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ case USB_ENDPOINT_XFER_BULK:
+ if (hsotg->core_params->dma_enable > 0 && chan->ep_is_in) {
+ /*
+ * NAK interrupts are enabled on bulk/control IN
+ * transfers in DMA mode for the sole purpose of
+ * resetting the error count after a transaction error
+ * occurs. The core will continue transferring data.
+ */
+ qtd->error_count = 0;
+ break;
+ }
+
+ /*
+ * NAK interrupts normally occur during OUT transfers in DMA
+ * or Slave mode. For IN transfers, more requests will be
+ * queued as request queue space is available.
+ */
+ qtd->error_count = 0;
+
+ if (!chan->qh->ping_state) {
+ dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb,
+ qtd, DWC2_HC_XFER_NAK);
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
+
+ if (chan->speed == USB_SPEED_HIGH)
+ chan->qh->ping_state = 1;
+ }
+
+ /*
+ * Halt the channel so the transfer can be re-started from
+ * the appropriate point or the PING protocol will
+ * start/continue
+ */
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK);
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ qtd->error_count = 0;
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NAK);
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ /* Should never get called for isochronous transfers */
+ dev_err(hsotg->dev, "NACK interrupt for ISOC transfer\n");
+ break;
+ }
+
+handle_nak_done:
+ disable_hc_int(hsotg, chnum, HCINTMSK_NAK);
+}
+
+/*
+ * Handles a host channel ACK interrupt. This interrupt is enabled when
+ * performing the PING protocol in Slave mode, when errors occur during
+ * either Slave mode or DMA mode, and during Start Split transactions.
+ */
+static void dwc2_hc_ack_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ struct dwc2_hcd_iso_packet_desc *frame_desc;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: ACK Received--\n",
+ chnum);
+
+ if (chan->do_split) {
+ /* Handle ACK on SSPLIT. ACK should not occur in CSPLIT. */
+ if (!chan->ep_is_in &&
+ chan->data_pid_start != DWC2_HC_PID_SETUP)
+ qtd->ssplit_out_xfer_count = chan->xfer_len;
+
+ if (chan->ep_type != USB_ENDPOINT_XFER_ISOC || chan->ep_is_in) {
+ qtd->complete_split = 1;
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_ACK);
+ } else {
+ /* ISOC OUT */
+ switch (chan->xact_pos) {
+ case DWC2_HCSPLT_XACTPOS_ALL:
+ break;
+ case DWC2_HCSPLT_XACTPOS_END:
+ qtd->isoc_split_pos = DWC2_HCSPLT_XACTPOS_ALL;
+ qtd->isoc_split_offset = 0;
+ break;
+ case DWC2_HCSPLT_XACTPOS_BEGIN:
+ case DWC2_HCSPLT_XACTPOS_MID:
+ /*
+ * For BEGIN or MID, calculate the length for
+ * the next microframe to determine the correct
+ * SSPLIT token, either MID or END
+ */
+ frame_desc = &qtd->urb->iso_descs[
+ qtd->isoc_frame_index];
+ qtd->isoc_split_offset += 188;
+
+ if (frame_desc->length - qtd->isoc_split_offset
+ <= 188)
+ qtd->isoc_split_pos =
+ DWC2_HCSPLT_XACTPOS_END;
+ else
+ qtd->isoc_split_pos =
+ DWC2_HCSPLT_XACTPOS_MID;
+ break;
+ }
+ }
+ } else {
+ qtd->error_count = 0;
+
+ if (chan->qh->ping_state) {
+ chan->qh->ping_state = 0;
+ /*
+ * Halt the channel so the transfer can be re-started
+ * from the appropriate point. This only happens in
+ * Slave mode. In DMA mode, the ping_state is cleared
+ * when the transfer is started because the core
+ * automatically executes the PING, then the transfer.
+ */
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_ACK);
+ }
+ }
+
+ /*
+ * If the ACK occurred when _not_ in the PING state, let the channel
+ * continue transferring data after clearing the error count
+ */
+ disable_hc_int(hsotg, chnum, HCINTMSK_ACK);
+}
+
+/*
+ * Handles a host channel NYET interrupt. This interrupt should only occur on
+ * Bulk and Control OUT endpoints and for complete split transactions. If a
+ * NYET occurs at the same time as a Transfer Complete interrupt, it is
+ * handled in the xfercomp interrupt handler, not here. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static void dwc2_hc_nyet_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: NYET Received--\n",
+ chnum);
+
+ /*
+ * NYET on CSPLIT
+ * re-do the CSPLIT immediately on non-periodic
+ */
+ if (chan->do_split && chan->complete_split) {
+ if (chan->ep_is_in && chan->ep_type == USB_ENDPOINT_XFER_ISOC &&
+ hsotg->core_params->dma_enable > 0) {
+ qtd->complete_split = 0;
+ qtd->isoc_split_offset = 0;
+ qtd->isoc_frame_index++;
+ if (qtd->urb &&
+ qtd->isoc_frame_index == qtd->urb->packet_count) {
+ dwc2_host_complete(hsotg, qtd, 0);
+ dwc2_release_channel(hsotg, chan, qtd,
+ DWC2_HC_XFER_URB_COMPLETE);
+ } else {
+ dwc2_release_channel(hsotg, chan, qtd,
+ DWC2_HC_XFER_NO_HALT_STATUS);
+ }
+ goto handle_nyet_done;
+ }
+
+ if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ int frnum = dwc2_hcd_get_frame_number(hsotg);
+
+ if (dwc2_full_frame_num(frnum) !=
+ dwc2_full_frame_num(chan->qh->sched_frame)) {
+ /*
+ * No longer in the same full speed frame.
+ * Treat this as a transaction error.
+ */
+#if 0
+ /*
+ * Todo: Fix system performance so this can
+ * be treated as an error. Right now complete
+ * splits cannot be scheduled precisely enough
+ * due to other system activity, so this error
+ * occurs regularly in Slave mode.
+ */
+ qtd->error_count++;
+#endif
+ qtd->complete_split = 0;
+ dwc2_halt_channel(hsotg, chan, qtd,
+ DWC2_HC_XFER_XACT_ERR);
+ /* Todo: add support for isoc release */
+ goto handle_nyet_done;
+ }
+ }
+
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NYET);
+ goto handle_nyet_done;
+ }
+
+ chan->qh->ping_state = 1;
+ qtd->error_count = 0;
+
+ dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb, qtd,
+ DWC2_HC_XFER_NYET);
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
+
+ /*
+ * Halt the channel and re-start the transfer so the PING protocol
+ * will start
+ */
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_NYET);
+
+handle_nyet_done:
+ disable_hc_int(hsotg, chnum, HCINTMSK_NYET);
+}
+
+/*
+ * Handles a host channel babble interrupt. This handler may be called in
+ * either DMA mode or Slave mode.
+ */
+static void dwc2_hc_babble_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: Babble Error--\n",
+ chnum);
+
+ dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
+
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
+ DWC2_HC_XFER_BABBLE_ERR);
+ goto disable_int;
+ }
+
+ if (chan->ep_type != USB_ENDPOINT_XFER_ISOC) {
+ dwc2_host_complete(hsotg, qtd, -EOVERFLOW);
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_BABBLE_ERR);
+ } else {
+ enum dwc2_halt_status halt_status;
+
+ halt_status = dwc2_update_isoc_urb_state(hsotg, chan, chnum,
+ qtd, DWC2_HC_XFER_BABBLE_ERR);
+ dwc2_halt_channel(hsotg, chan, qtd, halt_status);
+ }
+
+disable_int:
+ disable_hc_int(hsotg, chnum, HCINTMSK_BBLERR);
+}
+
+/*
+ * Handles a host channel AHB error interrupt. This handler is only called in
+ * DMA mode.
+ */
+static void dwc2_hc_ahberr_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ struct dwc2_hcd_urb *urb = qtd->urb;
+ char *pipetype, *speed;
+ u32 hcchar;
+ u32 hcsplt;
+ u32 hctsiz;
+ u32 hc_dma;
+
+ dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: AHB Error--\n",
+ chnum);
+
+ if (!urb)
+ goto handle_ahberr_halt;
+
+ dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
+
+ hcchar = readl(hsotg->regs + HCCHAR(chnum));
+ hcsplt = readl(hsotg->regs + HCSPLT(chnum));
+ hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
+ hc_dma = readl(hsotg->regs + HCDMA(chnum));
+
+ dev_err(hsotg->dev, "AHB ERROR, Channel %d\n", chnum);
+ dev_err(hsotg->dev, " hcchar 0x%08x, hcsplt 0x%08x\n", hcchar, hcsplt);
+ dev_err(hsotg->dev, " hctsiz 0x%08x, hc_dma 0x%08x\n", hctsiz, hc_dma);
+ dev_err(hsotg->dev, " Device address: %d\n",
+ dwc2_hcd_get_dev_addr(&urb->pipe_info));
+ dev_err(hsotg->dev, " Endpoint: %d, %s\n",
+ dwc2_hcd_get_ep_num(&urb->pipe_info),
+ dwc2_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT");
+
+ switch (dwc2_hcd_get_pipe_type(&urb->pipe_info)) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ pipetype = "CONTROL";
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ pipetype = "BULK";
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ pipetype = "INTERRUPT";
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ pipetype = "ISOCHRONOUS";
+ break;
+ default:
+ pipetype = "UNKNOWN";
+ break;
+ }
+
+ dev_err(hsotg->dev, " Endpoint type: %s\n", pipetype);
+
+ switch (chan->speed) {
+ case USB_SPEED_HIGH:
+ speed = "HIGH";
+ break;
+ case USB_SPEED_FULL:
+ speed = "FULL";
+ break;
+ case USB_SPEED_LOW:
+ speed = "LOW";
+ break;
+ default:
+ speed = "UNKNOWN";
+ break;
+ }
+
+ dev_err(hsotg->dev, " Speed: %s\n", speed);
+
+ dev_err(hsotg->dev, " Max packet size: %d\n",
+ dwc2_hcd_get_mps(&urb->pipe_info));
+ dev_err(hsotg->dev, " Data buffer length: %d\n", urb->length);
+ dev_err(hsotg->dev, " Transfer buffer: %p, Transfer DMA: %08lx\n",
+ urb->buf, (unsigned long)urb->dma);
+ dev_err(hsotg->dev, " Setup buffer: %p, Setup DMA: %08lx\n",
+ urb->setup_packet, (unsigned long)urb->setup_dma);
+ dev_err(hsotg->dev, " Interval: %d\n", urb->interval);
+
+ /* Core halts the channel for Descriptor DMA mode */
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
+ DWC2_HC_XFER_AHB_ERR);
+ goto handle_ahberr_done;
+ }
+
+ dwc2_host_complete(hsotg, qtd, -EIO);
+
+handle_ahberr_halt:
+ /*
+ * Force a channel halt. Don't call dwc2_halt_channel because that won't
+ * write to the HCCHARn register in DMA mode to force the halt.
+ */
+ dwc2_hc_halt(hsotg, chan, DWC2_HC_XFER_AHB_ERR);
+
+handle_ahberr_done:
+ disable_hc_int(hsotg, chnum, HCINTMSK_AHBERR);
+}
+
+/*
+ * Handles a host channel transaction error interrupt. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static void dwc2_hc_xacterr_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ dev_dbg(hsotg->dev,
+ "--Host Channel %d Interrupt: Transaction Error--\n", chnum);
+
+ dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
+
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
+ DWC2_HC_XFER_XACT_ERR);
+ goto handle_xacterr_done;
+ }
+
+ switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ case USB_ENDPOINT_XFER_BULK:
+ qtd->error_count++;
+ if (!chan->qh->ping_state) {
+
+ dwc2_update_urb_state_abn(hsotg, chan, chnum, qtd->urb,
+ qtd, DWC2_HC_XFER_XACT_ERR);
+ dwc2_hcd_save_data_toggle(hsotg, chan, chnum, qtd);
+ if (!chan->ep_is_in && chan->speed == USB_SPEED_HIGH)
+ chan->qh->ping_state = 1;
+ }
+
+ /*
+ * Halt the channel so the transfer can be re-started from
+ * the appropriate point or the PING protocol will start
+ */
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_XACT_ERR);
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ qtd->error_count++;
+ if (chan->do_split && chan->complete_split)
+ qtd->complete_split = 0;
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_XACT_ERR);
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ {
+ enum dwc2_halt_status halt_status;
+
+ halt_status = dwc2_update_isoc_urb_state(hsotg, chan,
+ chnum, qtd, DWC2_HC_XFER_XACT_ERR);
+ dwc2_halt_channel(hsotg, chan, qtd, halt_status);
+ }
+ break;
+ }
+
+handle_xacterr_done:
+ disable_hc_int(hsotg, chnum, HCINTMSK_XACTERR);
+}
+
+/*
+ * Handles a host channel frame overrun interrupt. This handler may be called
+ * in either DMA mode or Slave mode.
+ */
+static void dwc2_hc_frmovrun_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ enum dwc2_halt_status halt_status;
+
+ if (dbg_hc(chan))
+ dev_dbg(hsotg->dev, "--Host Channel %d Interrupt: Frame Overrun--\n",
+ chnum);
+
+ dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
+
+ switch (dwc2_hcd_get_pipe_type(&qtd->urb->pipe_info)) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ case USB_ENDPOINT_XFER_BULK:
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ dwc2_halt_channel(hsotg, chan, qtd, DWC2_HC_XFER_FRAME_OVERRUN);
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ halt_status = dwc2_update_isoc_urb_state(hsotg, chan, chnum,
+ qtd, DWC2_HC_XFER_FRAME_OVERRUN);
+ dwc2_halt_channel(hsotg, chan, qtd, halt_status);
+ break;
+ }
+
+ disable_hc_int(hsotg, chnum, HCINTMSK_FRMOVRUN);
+}
+
+/*
+ * Handles a host channel data toggle error interrupt. This handler may be
+ * called in either DMA mode or Slave mode.
+ */
+static void dwc2_hc_datatglerr_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ dev_dbg(hsotg->dev,
+ "--Host Channel %d Interrupt: Data Toggle Error--\n", chnum);
+
+ if (chan->ep_is_in)
+ qtd->error_count = 0;
+ else
+ dev_err(hsotg->dev,
+ "Data Toggle Error on OUT transfer, channel %d\n",
+ chnum);
+
+ dwc2_hc_handle_tt_clear(hsotg, chan, qtd);
+ disable_hc_int(hsotg, chnum, HCINTMSK_DATATGLERR);
+}
+
+/*
+ * For debug only. It checks that a valid halt status is set and that
+ * HCCHARn.chdis is clear. If there's a problem, corrective action is
+ * taken and a warning is issued.
+ *
+ * Return: true if halt status is ok, false otherwise
+ */
+static bool dwc2_halt_status_ok(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+#ifdef DEBUG
+ u32 hcchar;
+ u32 hctsiz;
+ u32 hcintmsk;
+ u32 hcsplt;
+
+ if (chan->halt_status == DWC2_HC_XFER_NO_HALT_STATUS) {
+ /*
+ * This code is here only as a check. This condition should
+ * never happen. Ignore the halt if it does occur.
+ */
+ hcchar = readl(hsotg->regs + HCCHAR(chnum));
+ hctsiz = readl(hsotg->regs + HCTSIZ(chnum));
+ hcintmsk = readl(hsotg->regs + HCINTMSK(chnum));
+ hcsplt = readl(hsotg->regs + HCSPLT(chnum));
+ dev_dbg(hsotg->dev,
+ "%s: chan->halt_status DWC2_HC_XFER_NO_HALT_STATUS,\n",
+ __func__);
+ dev_dbg(hsotg->dev,
+ "channel %d, hcchar 0x%08x, hctsiz 0x%08x,\n",
+ chnum, hcchar, hctsiz);
+ dev_dbg(hsotg->dev,
+ "hcint 0x%08x, hcintmsk 0x%08x, hcsplt 0x%08x,\n",
+ chan->hcint, hcintmsk, hcsplt);
+ if (qtd)
+ dev_dbg(hsotg->dev, "qtd->complete_split %d\n",
+ qtd->complete_split);
+ dev_warn(hsotg->dev,
+ "%s: no halt status, channel %d, ignoring interrupt\n",
+ __func__, chnum);
+ return false;
+ }
+
+ /*
+ * This code is here only as a check. hcchar.chdis should never be set
+ * when the halt interrupt occurs. Halt the channel again if it does
+ * occur.
+ */
+ hcchar = readl(hsotg->regs + HCCHAR(chnum));
+ if (hcchar & HCCHAR_CHDIS) {
+ dev_warn(hsotg->dev,
+ "%s: hcchar.chdis set unexpectedly, hcchar 0x%08x, trying to halt again\n",
+ __func__, hcchar);
+ chan->halt_pending = 0;
+ dwc2_halt_channel(hsotg, chan, qtd, chan->halt_status);
+ return false;
+ }
+#endif
+
+ return true;
+}
+
+/*
+ * Handles a host Channel Halted interrupt in DMA mode. This handler
+ * determines the reason the channel halted and proceeds accordingly.
+ */
+static void dwc2_hc_chhltd_intr_dma(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ u32 hcintmsk;
+ int out_nak_enh = 0;
+
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev,
+ "--Host Channel %d Interrupt: DMA Channel Halted--\n",
+ chnum);
+
+ /*
+ * For core with OUT NAK enhancement, the flow for high-speed
+ * CONTROL/BULK OUT is handled a little differently
+ */
+ if (hsotg->hw_params.snpsid >= DWC2_CORE_REV_2_71a) {
+ if (chan->speed == USB_SPEED_HIGH && !chan->ep_is_in &&
+ (chan->ep_type == USB_ENDPOINT_XFER_CONTROL ||
+ chan->ep_type == USB_ENDPOINT_XFER_BULK)) {
+ out_nak_enh = 1;
+ }
+ }
+
+ if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE ||
+ (chan->halt_status == DWC2_HC_XFER_AHB_ERR &&
+ hsotg->core_params->dma_desc_enable <= 0)) {
+ if (hsotg->core_params->dma_desc_enable > 0)
+ dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
+ chan->halt_status);
+ else
+ /*
+ * Just release the channel. A dequeue can happen on a
+ * transfer timeout. In the case of an AHB Error, the
+ * channel was forced to halt because there's no way to
+ * gracefully recover.
+ */
+ dwc2_release_channel(hsotg, chan, qtd,
+ chan->halt_status);
+ return;
+ }
+
+ hcintmsk = readl(hsotg->regs + HCINTMSK(chnum));
+
+ if (chan->hcint & HCINTMSK_XFERCOMPL) {
+ /*
+ * Todo: This is here because of a possible hardware bug. Spec
+ * says that on SPLIT-ISOC OUT transfers in DMA mode that a HALT
+ * interrupt w/ACK bit set should occur, but I only see the
+ * XFERCOMP bit, even with it masked out. This is a workaround
+ * for that behavior. Should fix this when hardware is fixed.
+ */
+ if (chan->ep_type == USB_ENDPOINT_XFER_ISOC && !chan->ep_is_in)
+ dwc2_hc_ack_intr(hsotg, chan, chnum, qtd);
+ dwc2_hc_xfercomp_intr(hsotg, chan, chnum, qtd);
+ } else if (chan->hcint & HCINTMSK_STALL) {
+ dwc2_hc_stall_intr(hsotg, chan, chnum, qtd);
+ } else if ((chan->hcint & HCINTMSK_XACTERR) &&
+ hsotg->core_params->dma_desc_enable <= 0) {
+ if (out_nak_enh) {
+ if (chan->hcint &
+ (HCINTMSK_NYET | HCINTMSK_NAK | HCINTMSK_ACK)) {
+ dev_vdbg(hsotg->dev,
+ "XactErr with NYET/NAK/ACK\n");
+ qtd->error_count = 0;
+ } else {
+ dev_vdbg(hsotg->dev,
+ "XactErr without NYET/NAK/ACK\n");
+ }
+ }
+
+ /*
+ * Must handle xacterr before nak or ack. Could get a xacterr
+ * at the same time as either of these on a BULK/CONTROL OUT
+ * that started with a PING. The xacterr takes precedence.
+ */
+ dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
+ } else if ((chan->hcint & HCINTMSK_XCS_XACT) &&
+ hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
+ } else if ((chan->hcint & HCINTMSK_AHBERR) &&
+ hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hc_ahberr_intr(hsotg, chan, chnum, qtd);
+ } else if (chan->hcint & HCINTMSK_BBLERR) {
+ dwc2_hc_babble_intr(hsotg, chan, chnum, qtd);
+ } else if (chan->hcint & HCINTMSK_FRMOVRUN) {
+ dwc2_hc_frmovrun_intr(hsotg, chan, chnum, qtd);
+ } else if (!out_nak_enh) {
+ if (chan->hcint & HCINTMSK_NYET) {
+ /*
+ * Must handle nyet before nak or ack. Could get a nyet
+ * at the same time as either of those on a BULK/CONTROL
+ * OUT that started with a PING. The nyet takes
+ * precedence.
+ */
+ dwc2_hc_nyet_intr(hsotg, chan, chnum, qtd);
+ } else if ((chan->hcint & HCINTMSK_NAK) &&
+ !(hcintmsk & HCINTMSK_NAK)) {
+ /*
+ * If nak is not masked, it's because a non-split IN
+ * transfer is in an error state. In that case, the nak
+ * is handled by the nak interrupt handler, not here.
+ * Handle nak here for BULK/CONTROL OUT transfers, which
+ * halt on a NAK to allow rewinding the buffer pointer.
+ */
+ dwc2_hc_nak_intr(hsotg, chan, chnum, qtd);
+ } else if ((chan->hcint & HCINTMSK_ACK) &&
+ !(hcintmsk & HCINTMSK_ACK)) {
+ /*
+ * If ack is not masked, it's because a non-split IN
+ * transfer is in an error state. In that case, the ack
+ * is handled by the ack interrupt handler, not here.
+ * Handle ack here for split transfers. Start splits
+ * halt on ACK.
+ */
+ dwc2_hc_ack_intr(hsotg, chan, chnum, qtd);
+ } else {
+ if (chan->ep_type == USB_ENDPOINT_XFER_INT ||
+ chan->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ /*
+ * A periodic transfer halted with no other
+ * channel interrupts set. Assume it was halted
+ * by the core because it could not be completed
+ * in its scheduled (micro)frame.
+ */
+ dev_dbg(hsotg->dev,
+ "%s: Halt channel %d (assume incomplete periodic transfer)\n",
+ __func__, chnum);
+ dwc2_halt_channel(hsotg, chan, qtd,
+ DWC2_HC_XFER_PERIODIC_INCOMPLETE);
+ } else {
+ dev_err(hsotg->dev,
+ "%s: Channel %d - ChHltd set, but reason is unknown\n",
+ __func__, chnum);
+ dev_err(hsotg->dev,
+ "hcint 0x%08x, intsts 0x%08x\n",
+ chan->hcint,
+ readl(hsotg->regs + GINTSTS));
+ }
+ }
+ } else {
+ dev_info(hsotg->dev,
+ "NYET/NAK/ACK/other in non-error case, 0x%08x\n",
+ chan->hcint);
+ }
+}
+
+/*
+ * Handles a host channel Channel Halted interrupt
+ *
+ * In slave mode, this handler is called only when the driver specifically
+ * requests a halt. This occurs during handling other host channel interrupts
+ * (e.g. nak, xacterr, stall, nyet, etc.).
+ *
+ * In DMA mode, this is the interrupt that occurs when the core has finished
+ * processing a transfer on a channel. Other host channel interrupts (except
+ * ahberr) are disabled in DMA mode.
+ */
+static void dwc2_hc_chhltd_intr(struct dwc2_hsotg *hsotg,
+ struct dwc2_host_chan *chan, int chnum,
+ struct dwc2_qtd *qtd)
+{
+ if (dbg_hc(chan))
+ dev_vdbg(hsotg->dev, "--Host Channel %d Interrupt: Channel Halted--\n",
+ chnum);
+
+ if (hsotg->core_params->dma_enable > 0) {
+ dwc2_hc_chhltd_intr_dma(hsotg, chan, chnum, qtd);
+ } else {
+ if (!dwc2_halt_status_ok(hsotg, chan, chnum, qtd))
+ return;
+ dwc2_release_channel(hsotg, chan, qtd, chan->halt_status);
+ }
+}
+
+/* Handles interrupt for a specific Host Channel */
+static void dwc2_hc_n_intr(struct dwc2_hsotg *hsotg, int chnum)
+{
+ struct dwc2_qtd *qtd;
+ struct dwc2_host_chan *chan;
+ u32 hcint, hcintmsk;
+
+ chan = hsotg->hc_ptr_array[chnum];
+
+ hcint = readl(hsotg->regs + HCINT(chnum));
+ hcintmsk = readl(hsotg->regs + HCINTMSK(chnum));
+ if (!chan) {
+ dev_err(hsotg->dev, "## hc_ptr_array for channel is NULL ##\n");
+ writel(hcint, hsotg->regs + HCINT(chnum));
+ return;
+ }
+
+ if (dbg_hc(chan)) {
+ dev_vdbg(hsotg->dev, "--Host Channel Interrupt--, Channel %d\n",
+ chnum);
+ dev_vdbg(hsotg->dev,
+ " hcint 0x%08x, hcintmsk 0x%08x, hcint&hcintmsk 0x%08x\n",
+ hcint, hcintmsk, hcint & hcintmsk);
+ }
+
+ writel(hcint, hsotg->regs + HCINT(chnum));
+ chan->hcint = hcint;
+ hcint &= hcintmsk;
+
+ /*
+ * If the channel was halted due to a dequeue, the qtd list might
+ * be empty or at least the first entry will not be the active qtd.
+ * In this case, take a shortcut and just release the channel.
+ */
+ if (chan->halt_status == DWC2_HC_XFER_URB_DEQUEUE) {
+ /*
+ * If the channel was halted, this should be the only
+ * interrupt unmasked
+ */
+ WARN_ON(hcint != HCINTMSK_CHHLTD);
+ if (hsotg->core_params->dma_desc_enable > 0)
+ dwc2_hcd_complete_xfer_ddma(hsotg, chan, chnum,
+ chan->halt_status);
+ else
+ dwc2_release_channel(hsotg, chan, NULL,
+ chan->halt_status);
+ return;
+ }
+
+ if (list_empty(&chan->qh->qtd_list)) {
+ /*
+ * TODO: Will this ever happen with the
+ * DWC2_HC_XFER_URB_DEQUEUE handling above?
+ */
+ dev_dbg(hsotg->dev, "## no QTD queued for channel %d ##\n",
+ chnum);
+ dev_dbg(hsotg->dev,
+ " hcint 0x%08x, hcintmsk 0x%08x, hcint&hcintmsk 0x%08x\n",
+ chan->hcint, hcintmsk, hcint);
+ chan->halt_status = DWC2_HC_XFER_NO_HALT_STATUS;
+ disable_hc_int(hsotg, chnum, HCINTMSK_CHHLTD);
+ chan->hcint = 0;
+ return;
+ }
+
+ qtd = list_first_entry(&chan->qh->qtd_list, struct dwc2_qtd,
+ qtd_list_entry);
+
+ if (hsotg->core_params->dma_enable <= 0) {
+ if ((hcint & HCINTMSK_CHHLTD) && hcint != HCINTMSK_CHHLTD)
+ hcint &= ~HCINTMSK_CHHLTD;
+ }
+
+ if (hcint & HCINTMSK_XFERCOMPL) {
+ dwc2_hc_xfercomp_intr(hsotg, chan, chnum, qtd);
+ /*
+ * If NYET occurred at same time as Xfer Complete, the NYET is
+ * handled by the Xfer Complete interrupt handler. Don't want
+ * to call the NYET interrupt handler in this case.
+ */
+ hcint &= ~HCINTMSK_NYET;
+ }
+ if (hcint & HCINTMSK_CHHLTD)
+ dwc2_hc_chhltd_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_AHBERR)
+ dwc2_hc_ahberr_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_STALL)
+ dwc2_hc_stall_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_NAK)
+ dwc2_hc_nak_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_ACK)
+ dwc2_hc_ack_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_NYET)
+ dwc2_hc_nyet_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_XACTERR)
+ dwc2_hc_xacterr_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_BBLERR)
+ dwc2_hc_babble_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_FRMOVRUN)
+ dwc2_hc_frmovrun_intr(hsotg, chan, chnum, qtd);
+ if (hcint & HCINTMSK_DATATGLERR)
+ dwc2_hc_datatglerr_intr(hsotg, chan, chnum, qtd);
+
+ chan->hcint = 0;
+}
+
+/*
+ * This interrupt indicates that one or more host channels has a pending
+ * interrupt. There are multiple conditions that can cause each host channel
+ * interrupt. This function determines which conditions have occurred for each
+ * host channel interrupt and handles them appropriately.
+ */
+static void dwc2_hc_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 haint;
+ int i;
+
+ haint = readl(hsotg->regs + HAINT);
+ if (dbg_perio()) {
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ dev_vdbg(hsotg->dev, "HAINT=%08x\n", haint);
+ }
+
+ for (i = 0; i < hsotg->core_params->host_channels; i++) {
+ if (haint & (1 << i))
+ dwc2_hc_n_intr(hsotg, i);
+ }
+}
+
+/* This function handles interrupts for the HCD */
+irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg)
+{
+ u32 gintsts, dbg_gintsts;
+ irqreturn_t retval = IRQ_NONE;
+
+ if (!dwc2_is_controller_alive(hsotg)) {
+ dev_warn(hsotg->dev, "Controller is dead\n");
+ return retval;
+ }
+
+ spin_lock(&hsotg->lock);
+
+ /* Check if HOST Mode */
+ if (dwc2_is_host_mode(hsotg)) {
+ gintsts = dwc2_read_core_intr(hsotg);
+ if (!gintsts) {
+ spin_unlock(&hsotg->lock);
+ return retval;
+ }
+
+ retval = IRQ_HANDLED;
+
+ dbg_gintsts = gintsts;
+#ifndef DEBUG_SOF
+ dbg_gintsts &= ~GINTSTS_SOF;
+#endif
+ if (!dbg_perio())
+ dbg_gintsts &= ~(GINTSTS_HCHINT | GINTSTS_RXFLVL |
+ GINTSTS_PTXFEMP);
+
+ /* Only print if there are any non-suppressed interrupts left */
+ if (dbg_gintsts)
+ dev_vdbg(hsotg->dev,
+ "DWC OTG HCD Interrupt Detected gintsts&gintmsk=0x%08x\n",
+ gintsts);
+
+ if (gintsts & GINTSTS_SOF)
+ dwc2_sof_intr(hsotg);
+ if (gintsts & GINTSTS_RXFLVL)
+ dwc2_rx_fifo_level_intr(hsotg);
+ if (gintsts & GINTSTS_NPTXFEMP)
+ dwc2_np_tx_fifo_empty_intr(hsotg);
+ if (gintsts & GINTSTS_PRTINT)
+ dwc2_port_intr(hsotg);
+ if (gintsts & GINTSTS_HCHINT)
+ dwc2_hc_intr(hsotg);
+ if (gintsts & GINTSTS_PTXFEMP)
+ dwc2_perio_tx_fifo_empty_intr(hsotg);
+
+ if (dbg_gintsts) {
+ dev_vdbg(hsotg->dev,
+ "DWC OTG HCD Finished Servicing Interrupts\n");
+ dev_vdbg(hsotg->dev,
+ "DWC OTG HCD gintsts=0x%08x gintmsk=0x%08x\n",
+ readl(hsotg->regs + GINTSTS),
+ readl(hsotg->regs + GINTMSK));
+ }
+ }
+
+ spin_unlock(&hsotg->lock);
+
+ return retval;
+}
--- /dev/null
+/*
+ * hcd_queue.c - DesignWare HS OTG Controller host queuing routines
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file contains the functions to manage Queue Heads and Queue
+ * Transfer Descriptors for Host mode
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include <linux/usb/hcd.h>
+#include <linux/usb/ch11.h>
+
+#include "core.h"
+#include "hcd.h"
+
+/**
+ * dwc2_qh_init() - Initializes a QH structure
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: The QH to init
+ * @urb: Holds the information about the device/endpoint needed to initialize
+ * the QH
+ */
+#define SCHEDULE_SLOP 10
+static void dwc2_qh_init(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ struct dwc2_hcd_urb *urb)
+{
+ int dev_speed, hub_addr, hub_port;
+ char *speed, *type;
+
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ /* Initialize QH */
+ qh->ep_type = dwc2_hcd_get_pipe_type(&urb->pipe_info);
+ qh->ep_is_in = dwc2_hcd_is_pipe_in(&urb->pipe_info) ? 1 : 0;
+
+ qh->data_toggle = DWC2_HC_PID_DATA0;
+ qh->maxp = dwc2_hcd_get_mps(&urb->pipe_info);
+ INIT_LIST_HEAD(&qh->qtd_list);
+ INIT_LIST_HEAD(&qh->qh_list_entry);
+
+ /* FS/LS Endpoint on HS Hub, NOT virtual root hub */
+ dev_speed = dwc2_host_get_speed(hsotg, urb->priv);
+
+ dwc2_host_hub_info(hsotg, urb->priv, &hub_addr, &hub_port);
+
+ if ((dev_speed == USB_SPEED_LOW || dev_speed == USB_SPEED_FULL) &&
+ hub_addr != 0 && hub_addr != 1) {
+ dev_vdbg(hsotg->dev,
+ "QH init: EP %d: TT found at hub addr %d, for port %d\n",
+ dwc2_hcd_get_ep_num(&urb->pipe_info), hub_addr,
+ hub_port);
+ qh->do_split = 1;
+ }
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_INT ||
+ qh->ep_type == USB_ENDPOINT_XFER_ISOC) {
+ /* Compute scheduling parameters once and save them */
+ u32 hprt, prtspd;
+
+ /* Todo: Account for split transfers in the bus time */
+ int bytecount =
+ dwc2_hb_mult(qh->maxp) * dwc2_max_packet(qh->maxp);
+
+ qh->usecs = NS_TO_US(usb_calc_bus_time(qh->do_split ?
+ USB_SPEED_HIGH : dev_speed, qh->ep_is_in,
+ qh->ep_type == USB_ENDPOINT_XFER_ISOC,
+ bytecount));
+ /* Start in a slightly future (micro)frame */
+ qh->sched_frame = dwc2_frame_num_inc(hsotg->frame_number,
+ SCHEDULE_SLOP);
+ qh->interval = urb->interval;
+#if 0
+ /* Increase interrupt polling rate for debugging */
+ if (qh->ep_type == USB_ENDPOINT_XFER_INT)
+ qh->interval = 8;
+#endif
+ hprt = readl(hsotg->regs + HPRT0);
+ prtspd = (hprt & HPRT0_SPD_MASK) >> HPRT0_SPD_SHIFT;
+ if (prtspd == HPRT0_SPD_HIGH_SPEED &&
+ (dev_speed == USB_SPEED_LOW ||
+ dev_speed == USB_SPEED_FULL)) {
+ qh->interval *= 8;
+ qh->sched_frame |= 0x7;
+ qh->start_split_frame = qh->sched_frame;
+ }
+ dev_dbg(hsotg->dev, "interval=%d\n", qh->interval);
+ }
+
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH Initialized\n");
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH - qh = %p\n", qh);
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Device Address = %d\n",
+ dwc2_hcd_get_dev_addr(&urb->pipe_info));
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Endpoint %d, %s\n",
+ dwc2_hcd_get_ep_num(&urb->pipe_info),
+ dwc2_hcd_is_pipe_in(&urb->pipe_info) ? "IN" : "OUT");
+
+ qh->dev_speed = dev_speed;
+
+ switch (dev_speed) {
+ case USB_SPEED_LOW:
+ speed = "low";
+ break;
+ case USB_SPEED_FULL:
+ speed = "full";
+ break;
+ case USB_SPEED_HIGH:
+ speed = "high";
+ break;
+ default:
+ speed = "?";
+ break;
+ }
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Speed = %s\n", speed);
+
+ switch (qh->ep_type) {
+ case USB_ENDPOINT_XFER_ISOC:
+ type = "isochronous";
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ type = "interrupt";
+ break;
+ case USB_ENDPOINT_XFER_CONTROL:
+ type = "control";
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ type = "bulk";
+ break;
+ default:
+ type = "?";
+ break;
+ }
+
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH - Type = %s\n", type);
+
+ if (qh->ep_type == USB_ENDPOINT_XFER_INT) {
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH - usecs = %d\n",
+ qh->usecs);
+ dev_vdbg(hsotg->dev, "DWC OTG HCD QH - interval = %d\n",
+ qh->interval);
+ }
+}
+
+/**
+ * dwc2_hcd_qh_create() - Allocates and initializes a QH
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @urb: Holds the information about the device/endpoint needed
+ * to initialize the QH
+ * @atomic_alloc: Flag to do atomic allocation if needed
+ *
+ * Return: Pointer to the newly allocated QH, or NULL on error
+ */
+static struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg,
+ struct dwc2_hcd_urb *urb,
+ gfp_t mem_flags)
+{
+ struct dwc2_qh *qh;
+
+ if (!urb->priv)
+ return NULL;
+
+ /* Allocate memory */
+ qh = kzalloc(sizeof(*qh), mem_flags);
+ if (!qh)
+ return NULL;
+
+ dwc2_qh_init(hsotg, qh, urb);
+
+ if (hsotg->core_params->dma_desc_enable > 0 &&
+ dwc2_hcd_qh_init_ddma(hsotg, qh, mem_flags) < 0) {
+ dwc2_hcd_qh_free(hsotg, qh);
+ return NULL;
+ }
+
+ return qh;
+}
+
+/**
+ * dwc2_hcd_qh_free() - Frees the QH
+ *
+ * @hsotg: HCD instance
+ * @qh: The QH to free
+ *
+ * QH should already be removed from the list. QTD list should already be empty
+ * if called from URB Dequeue.
+ *
+ * Must NOT be called with interrupt disabled or spinlock held
+ */
+void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ u32 buf_size;
+
+ if (hsotg->core_params->dma_desc_enable > 0) {
+ dwc2_hcd_qh_free_ddma(hsotg, qh);
+ } else if (qh->dw_align_buf) {
+ if (qh->ep_type == USB_ENDPOINT_XFER_ISOC)
+ buf_size = 4096;
+ else
+ buf_size = hsotg->core_params->max_transfer_size;
+ dma_free_coherent(hsotg->dev, buf_size, qh->dw_align_buf,
+ qh->dw_align_buf_dma);
+ }
+
+ kfree(qh);
+}
+
+/**
+ * dwc2_periodic_channel_available() - Checks that a channel is available for a
+ * periodic transfer
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ *
+ * Return: 0 if successful, negative error code otherwise
+ */
+static int dwc2_periodic_channel_available(struct dwc2_hsotg *hsotg)
+{
+ /*
+ * Currently assuming that there is a dedicated host channel for
+ * each periodic transaction plus at least one host channel for
+ * non-periodic transactions
+ */
+ int status;
+ int num_channels;
+
+ num_channels = hsotg->core_params->host_channels;
+ if (hsotg->periodic_channels + hsotg->non_periodic_channels <
+ num_channels
+ && hsotg->periodic_channels < num_channels - 1) {
+ status = 0;
+ } else {
+ dev_dbg(hsotg->dev,
+ "%s: Total channels: %d, Periodic: %d, "
+ "Non-periodic: %d\n", __func__, num_channels,
+ hsotg->periodic_channels, hsotg->non_periodic_channels);
+ status = -ENOSPC;
+ }
+
+ return status;
+}
+
+/**
+ * dwc2_check_periodic_bandwidth() - Checks that there is sufficient bandwidth
+ * for the specified QH in the periodic schedule
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: QH containing periodic bandwidth required
+ *
+ * Return: 0 if successful, negative error code otherwise
+ *
+ * For simplicity, this calculation assumes that all the transfers in the
+ * periodic schedule may occur in the same (micro)frame
+ */
+static int dwc2_check_periodic_bandwidth(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh)
+{
+ int status;
+ s16 max_claimed_usecs;
+
+ status = 0;
+
+ if (qh->dev_speed == USB_SPEED_HIGH || qh->do_split) {
+ /*
+ * High speed mode
+ * Max periodic usecs is 80% x 125 usec = 100 usec
+ */
+ max_claimed_usecs = 100 - qh->usecs;
+ } else {
+ /*
+ * Full speed mode
+ * Max periodic usecs is 90% x 1000 usec = 900 usec
+ */
+ max_claimed_usecs = 900 - qh->usecs;
+ }
+
+ if (hsotg->periodic_usecs > max_claimed_usecs) {
+ dev_err(hsotg->dev,
+ "%s: already claimed usecs %d, required usecs %d\n",
+ __func__, hsotg->periodic_usecs, qh->usecs);
+ status = -ENOSPC;
+ }
+
+ return status;
+}
+
+/**
+ * Microframe scheduler
+ * track the total use in hsotg->frame_usecs
+ * keep each qh use in qh->frame_usecs
+ * when surrendering the qh then donate the time back
+ */
+static const unsigned short max_uframe_usecs[] = {
+ 100, 100, 100, 100, 100, 100, 30, 0
+};
+
+void dwc2_hcd_init_usecs(struct dwc2_hsotg *hsotg)
+{
+ int i;
+
+ for (i = 0; i < 8; i++)
+ hsotg->frame_usecs[i] = max_uframe_usecs[i];
+}
+
+static int dwc2_find_single_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ unsigned short utime = qh->usecs;
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ /* At the start hsotg->frame_usecs[i] = max_uframe_usecs[i] */
+ if (utime <= hsotg->frame_usecs[i]) {
+ hsotg->frame_usecs[i] -= utime;
+ qh->frame_usecs[i] += utime;
+ return i;
+ }
+ }
+ return -ENOSPC;
+}
+
+/*
+ * use this for FS apps that can span multiple uframes
+ */
+static int dwc2_find_multi_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ unsigned short utime = qh->usecs;
+ unsigned short xtime;
+ int t_left;
+ int i;
+ int j;
+ int k;
+
+ for (i = 0; i < 8; i++) {
+ if (hsotg->frame_usecs[i] <= 0)
+ continue;
+
+ /*
+ * we need n consecutive slots so use j as a start slot
+ * j plus j+1 must be enough time (for now)
+ */
+ xtime = hsotg->frame_usecs[i];
+ for (j = i + 1; j < 8; j++) {
+ /*
+ * if we add this frame remaining time to xtime we may
+ * be OK, if not we need to test j for a complete frame
+ */
+ if (xtime + hsotg->frame_usecs[j] < utime) {
+ if (hsotg->frame_usecs[j] <
+ max_uframe_usecs[j])
+ continue;
+ }
+ if (xtime >= utime) {
+ t_left = utime;
+ for (k = i; k < 8; k++) {
+ t_left -= hsotg->frame_usecs[k];
+ if (t_left <= 0) {
+ qh->frame_usecs[k] +=
+ hsotg->frame_usecs[k]
+ + t_left;
+ hsotg->frame_usecs[k] = -t_left;
+ return i;
+ } else {
+ qh->frame_usecs[k] +=
+ hsotg->frame_usecs[k];
+ hsotg->frame_usecs[k] = 0;
+ }
+ }
+ }
+ /* add the frame time to x time */
+ xtime += hsotg->frame_usecs[j];
+ /* we must have a fully available next frame or break */
+ if (xtime < utime &&
+ hsotg->frame_usecs[j] == max_uframe_usecs[j])
+ continue;
+ }
+ }
+ return -ENOSPC;
+}
+
+static int dwc2_find_uframe(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ int ret;
+
+ if (qh->dev_speed == USB_SPEED_HIGH) {
+ /* if this is a hs transaction we need a full frame */
+ ret = dwc2_find_single_uframe(hsotg, qh);
+ } else {
+ /*
+ * if this is a fs transaction we may need a sequence
+ * of frames
+ */
+ ret = dwc2_find_multi_uframe(hsotg, qh);
+ }
+ return ret;
+}
+
+/**
+ * dwc2_check_max_xfer_size() - Checks that the max transfer size allowed in a
+ * host channel is large enough to handle the maximum data transfer in a single
+ * (micro)frame for a periodic transfer
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: QH for a periodic endpoint
+ *
+ * Return: 0 if successful, negative error code otherwise
+ */
+static int dwc2_check_max_xfer_size(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh)
+{
+ u32 max_xfer_size;
+ u32 max_channel_xfer_size;
+ int status = 0;
+
+ max_xfer_size = dwc2_max_packet(qh->maxp) * dwc2_hb_mult(qh->maxp);
+ max_channel_xfer_size = hsotg->core_params->max_transfer_size;
+
+ if (max_xfer_size > max_channel_xfer_size) {
+ dev_err(hsotg->dev,
+ "%s: Periodic xfer length %d > max xfer length for channel %d\n",
+ __func__, max_xfer_size, max_channel_xfer_size);
+ status = -ENOSPC;
+ }
+
+ return status;
+}
+
+/**
+ * dwc2_schedule_periodic() - Schedules an interrupt or isochronous transfer in
+ * the periodic schedule
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: QH for the periodic transfer. The QH should already contain the
+ * scheduling information.
+ *
+ * Return: 0 if successful, negative error code otherwise
+ */
+static int dwc2_schedule_periodic(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ int status;
+
+ if (hsotg->core_params->uframe_sched > 0) {
+ int frame = -1;
+
+ status = dwc2_find_uframe(hsotg, qh);
+ if (status == 0)
+ frame = 7;
+ else if (status > 0)
+ frame = status - 1;
+
+ /* Set the new frame up */
+ if (frame >= 0) {
+ qh->sched_frame &= ~0x7;
+ qh->sched_frame |= (frame & 7);
+ }
+
+ if (status > 0)
+ status = 0;
+ } else {
+ status = dwc2_periodic_channel_available(hsotg);
+ if (status) {
+ dev_info(hsotg->dev,
+ "%s: No host channel available for periodic transfer\n",
+ __func__);
+ return status;
+ }
+
+ status = dwc2_check_periodic_bandwidth(hsotg, qh);
+ }
+
+ if (status) {
+ dev_dbg(hsotg->dev,
+ "%s: Insufficient periodic bandwidth for periodic transfer\n",
+ __func__);
+ return status;
+ }
+
+ status = dwc2_check_max_xfer_size(hsotg, qh);
+ if (status) {
+ dev_dbg(hsotg->dev,
+ "%s: Channel max transfer size too small for periodic transfer\n",
+ __func__);
+ return status;
+ }
+
+ if (hsotg->core_params->dma_desc_enable > 0)
+ /* Don't rely on SOF and start in ready schedule */
+ list_add_tail(&qh->qh_list_entry, &hsotg->periodic_sched_ready);
+ else
+ /* Always start in inactive schedule */
+ list_add_tail(&qh->qh_list_entry,
+ &hsotg->periodic_sched_inactive);
+
+ if (hsotg->core_params->uframe_sched <= 0)
+ /* Reserve periodic channel */
+ hsotg->periodic_channels++;
+
+ /* Update claimed usecs per (micro)frame */
+ hsotg->periodic_usecs += qh->usecs;
+
+ return status;
+}
+
+/**
+ * dwc2_deschedule_periodic() - Removes an interrupt or isochronous transfer
+ * from the periodic schedule
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: QH for the periodic transfer
+ */
+static void dwc2_deschedule_periodic(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh)
+{
+ int i;
+
+ list_del_init(&qh->qh_list_entry);
+
+ /* Update claimed usecs per (micro)frame */
+ hsotg->periodic_usecs -= qh->usecs;
+
+ if (hsotg->core_params->uframe_sched > 0) {
+ for (i = 0; i < 8; i++) {
+ hsotg->frame_usecs[i] += qh->frame_usecs[i];
+ qh->frame_usecs[i] = 0;
+ }
+ } else {
+ /* Release periodic channel reservation */
+ hsotg->periodic_channels--;
+ }
+}
+
+/**
+ * dwc2_hcd_qh_add() - Adds a QH to either the non periodic or periodic
+ * schedule if it is not already in the schedule. If the QH is already in
+ * the schedule, no action is taken.
+ *
+ * @hsotg: The HCD state structure for the DWC OTG controller
+ * @qh: The QH to add
+ *
+ * Return: 0 if successful, negative error code otherwise
+ */
+int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ int status;
+ u32 intr_mask;
+
+ if (dbg_qh(qh))
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ if (!list_empty(&qh->qh_list_entry))
+ /* QH already in a schedule */
+ return 0;
+
+ /* Add the new QH to the appropriate schedule */
+ if (dwc2_qh_is_non_per(qh)) {
+ /* Always start in inactive schedule */
+ list_add_tail(&qh->qh_list_entry,
+ &hsotg->non_periodic_sched_inactive);
+ return 0;
+ }
+
+ status = dwc2_schedule_periodic(hsotg, qh);
+ if (status)
+ return status;
+ if (!hsotg->periodic_qh_count) {
+ intr_mask = readl(hsotg->regs + GINTMSK);
+ intr_mask |= GINTSTS_SOF;
+ writel(intr_mask, hsotg->regs + GINTMSK);
+ }
+ hsotg->periodic_qh_count++;
+
+ return 0;
+}
+
+/**
+ * dwc2_hcd_qh_unlink() - Removes a QH from either the non-periodic or periodic
+ * schedule. Memory is not freed.
+ *
+ * @hsotg: The HCD state structure
+ * @qh: QH to remove from schedule
+ */
+void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh)
+{
+ u32 intr_mask;
+
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ if (list_empty(&qh->qh_list_entry))
+ /* QH is not in a schedule */
+ return;
+
+ if (dwc2_qh_is_non_per(qh)) {
+ if (hsotg->non_periodic_qh_ptr == &qh->qh_list_entry)
+ hsotg->non_periodic_qh_ptr =
+ hsotg->non_periodic_qh_ptr->next;
+ list_del_init(&qh->qh_list_entry);
+ return;
+ }
+
+ dwc2_deschedule_periodic(hsotg, qh);
+ hsotg->periodic_qh_count--;
+ if (!hsotg->periodic_qh_count) {
+ intr_mask = readl(hsotg->regs + GINTMSK);
+ intr_mask &= ~GINTSTS_SOF;
+ writel(intr_mask, hsotg->regs + GINTMSK);
+ }
+}
+
+/*
+ * Schedule the next continuing periodic split transfer
+ */
+static void dwc2_sched_periodic_split(struct dwc2_hsotg *hsotg,
+ struct dwc2_qh *qh, u16 frame_number,
+ int sched_next_periodic_split)
+{
+ u16 incr;
+
+ if (sched_next_periodic_split) {
+ qh->sched_frame = frame_number;
+ incr = dwc2_frame_num_inc(qh->start_split_frame, 1);
+ if (dwc2_frame_num_le(frame_number, incr)) {
+ /*
+ * Allow one frame to elapse after start split
+ * microframe before scheduling complete split, but
+ * DON'T if we are doing the next start split in the
+ * same frame for an ISOC out
+ */
+ if (qh->ep_type != USB_ENDPOINT_XFER_ISOC ||
+ qh->ep_is_in != 0) {
+ qh->sched_frame =
+ dwc2_frame_num_inc(qh->sched_frame, 1);
+ }
+ }
+ } else {
+ qh->sched_frame = dwc2_frame_num_inc(qh->start_split_frame,
+ qh->interval);
+ if (dwc2_frame_num_le(qh->sched_frame, frame_number))
+ qh->sched_frame = frame_number;
+ qh->sched_frame |= 0x7;
+ qh->start_split_frame = qh->sched_frame;
+ }
+}
+
+/*
+ * Deactivates a QH. For non-periodic QHs, removes the QH from the active
+ * non-periodic schedule. The QH is added to the inactive non-periodic
+ * schedule if any QTDs are still attached to the QH.
+ *
+ * For periodic QHs, the QH is removed from the periodic queued schedule. If
+ * there are any QTDs still attached to the QH, the QH is added to either the
+ * periodic inactive schedule or the periodic ready schedule and its next
+ * scheduled frame is calculated. The QH is placed in the ready schedule if
+ * the scheduled frame has been reached already. Otherwise it's placed in the
+ * inactive schedule. If there are no QTDs attached to the QH, the QH is
+ * completely removed from the periodic schedule.
+ */
+void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
+ int sched_next_periodic_split)
+{
+ u16 frame_number;
+
+ if (dbg_qh(qh))
+ dev_vdbg(hsotg->dev, "%s()\n", __func__);
+
+ if (dwc2_qh_is_non_per(qh)) {
+ dwc2_hcd_qh_unlink(hsotg, qh);
+ if (!list_empty(&qh->qtd_list))
+ /* Add back to inactive non-periodic schedule */
+ dwc2_hcd_qh_add(hsotg, qh);
+ return;
+ }
+
+ frame_number = dwc2_hcd_get_frame_number(hsotg);
+
+ if (qh->do_split) {
+ dwc2_sched_periodic_split(hsotg, qh, frame_number,
+ sched_next_periodic_split);
+ } else {
+ qh->sched_frame = dwc2_frame_num_inc(qh->sched_frame,
+ qh->interval);
+ if (dwc2_frame_num_le(qh->sched_frame, frame_number))
+ qh->sched_frame = frame_number;
+ }
+
+ if (list_empty(&qh->qtd_list)) {
+ dwc2_hcd_qh_unlink(hsotg, qh);
+ return;
+ }
+ /*
+ * Remove from periodic_sched_queued and move to
+ * appropriate queue
+ */
+ if ((hsotg->core_params->uframe_sched > 0 &&
+ dwc2_frame_num_le(qh->sched_frame, frame_number)) ||
+ (hsotg->core_params->uframe_sched <= 0 &&
+ qh->sched_frame == frame_number))
+ list_move(&qh->qh_list_entry, &hsotg->periodic_sched_ready);
+ else
+ list_move(&qh->qh_list_entry, &hsotg->periodic_sched_inactive);
+}
+
+/**
+ * dwc2_hcd_qtd_init() - Initializes a QTD structure
+ *
+ * @qtd: The QTD to initialize
+ * @urb: The associated URB
+ */
+void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb)
+{
+ qtd->urb = urb;
+ if (dwc2_hcd_get_pipe_type(&urb->pipe_info) ==
+ USB_ENDPOINT_XFER_CONTROL) {
+ /*
+ * The only time the QTD data toggle is used is on the data
+ * phase of control transfers. This phase always starts with
+ * DATA1.
+ */
+ qtd->data_toggle = DWC2_HC_PID_DATA1;
+ qtd->control_phase = DWC2_CONTROL_SETUP;
+ }
+
+ /* Start split */
+ qtd->complete_split = 0;
+ qtd->isoc_split_pos = DWC2_HCSPLT_XACTPOS_ALL;
+ qtd->isoc_split_offset = 0;
+ qtd->in_process = 0;
+
+ /* Store the qtd ptr in the urb to reference the QTD */
+ urb->qtd = qtd;
+}
+
+/**
+ * dwc2_hcd_qtd_add() - Adds a QTD to the QTD-list of a QH
+ *
+ * @hsotg: The DWC HCD structure
+ * @qtd: The QTD to add
+ * @qh: Out parameter to return queue head
+ * @atomic_alloc: Flag to do atomic alloc if needed
+ *
+ * Return: 0 if successful, negative error code otherwise
+ *
+ * Finds the correct QH to place the QTD into. If it does not find a QH, it
+ * will create a new QH. If the QH to which the QTD is added is not currently
+ * scheduled, it is placed into the proper schedule based on its EP type.
+ */
+int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd,
+ struct dwc2_qh **qh, gfp_t mem_flags)
+{
+ struct dwc2_hcd_urb *urb = qtd->urb;
+ unsigned long flags;
+ int allocated = 0;
+ int retval;
+
+ /*
+ * Get the QH which holds the QTD-list to insert to. Create QH if it
+ * doesn't exist.
+ */
+ if (*qh == NULL) {
+ *qh = dwc2_hcd_qh_create(hsotg, urb, mem_flags);
+ if (*qh == NULL)
+ return -ENOMEM;
+ allocated = 1;
+ }
+
+ spin_lock_irqsave(&hsotg->lock, flags);
+
+ retval = dwc2_hcd_qh_add(hsotg, *qh);
+ if (retval)
+ goto fail;
+
+ qtd->qh = *qh;
+ list_add_tail(&qtd->qtd_list_entry, &(*qh)->qtd_list);
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+
+ return 0;
+
+fail:
+ if (allocated) {
+ struct dwc2_qtd *qtd2, *qtd2_tmp;
+ struct dwc2_qh *qh_tmp = *qh;
+
+ *qh = NULL;
+ dwc2_hcd_qh_unlink(hsotg, qh_tmp);
+
+ /* Free each QTD in the QH's QTD list */
+ list_for_each_entry_safe(qtd2, qtd2_tmp, &qh_tmp->qtd_list,
+ qtd_list_entry)
+ dwc2_hcd_qtd_unlink_and_free(hsotg, qtd2, qh_tmp);
+
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ dwc2_hcd_qh_free(hsotg, qh_tmp);
+ } else {
+ spin_unlock_irqrestore(&hsotg->lock, flags);
+ }
+
+ return retval;
+}
--- /dev/null
+/*
+ * hw.h - DesignWare HS OTG Controller hardware definitions
+ *
+ * Copyright 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __DWC2_HW_H__
+#define __DWC2_HW_H__
+
+#define HSOTG_REG(x) (x)
+
+#define GOTGCTL HSOTG_REG(0x000)
+#define GOTGCTL_CHIRPEN (1 << 27)
+#define GOTGCTL_MULT_VALID_BC_MASK (0x1f << 22)
+#define GOTGCTL_MULT_VALID_BC_SHIFT 22
+#define GOTGCTL_OTGVER (1 << 20)
+#define GOTGCTL_BSESVLD (1 << 19)
+#define GOTGCTL_ASESVLD (1 << 18)
+#define GOTGCTL_DBNC_SHORT (1 << 17)
+#define GOTGCTL_CONID_B (1 << 16)
+#define GOTGCTL_DEVHNPEN (1 << 11)
+#define GOTGCTL_HSTSETHNPEN (1 << 10)
+#define GOTGCTL_HNPREQ (1 << 9)
+#define GOTGCTL_HSTNEGSCS (1 << 8)
+#define GOTGCTL_SESREQ (1 << 1)
+#define GOTGCTL_SESREQSCS (1 << 0)
+
+#define GOTGINT HSOTG_REG(0x004)
+#define GOTGINT_DBNCE_DONE (1 << 19)
+#define GOTGINT_A_DEV_TOUT_CHG (1 << 18)
+#define GOTGINT_HST_NEG_DET (1 << 17)
+#define GOTGINT_HST_NEG_SUC_STS_CHNG (1 << 9)
+#define GOTGINT_SES_REQ_SUC_STS_CHNG (1 << 8)
+#define GOTGINT_SES_END_DET (1 << 2)
+
+#define GAHBCFG HSOTG_REG(0x008)
+#define GAHBCFG_AHB_SINGLE (1 << 23)
+#define GAHBCFG_NOTI_ALL_DMA_WRIT (1 << 22)
+#define GAHBCFG_REM_MEM_SUPP (1 << 21)
+#define GAHBCFG_P_TXF_EMP_LVL (1 << 8)
+#define GAHBCFG_NP_TXF_EMP_LVL (1 << 7)
+#define GAHBCFG_DMA_EN (1 << 5)
+#define GAHBCFG_HBSTLEN_MASK (0xf << 1)
+#define GAHBCFG_HBSTLEN_SHIFT 1
+#define GAHBCFG_HBSTLEN_SINGLE 0
+#define GAHBCFG_HBSTLEN_INCR 1
+#define GAHBCFG_HBSTLEN_INCR4 3
+#define GAHBCFG_HBSTLEN_INCR8 5
+#define GAHBCFG_HBSTLEN_INCR16 7
+#define GAHBCFG_GLBL_INTR_EN (1 << 0)
+#define GAHBCFG_CTRL_MASK (GAHBCFG_P_TXF_EMP_LVL | \
+ GAHBCFG_NP_TXF_EMP_LVL | \
+ GAHBCFG_DMA_EN | \
+ GAHBCFG_GLBL_INTR_EN)
+
+#define GUSBCFG HSOTG_REG(0x00C)
+#define GUSBCFG_FORCEDEVMODE (1 << 30)
+#define GUSBCFG_FORCEHOSTMODE (1 << 29)
+#define GUSBCFG_TXENDDELAY (1 << 28)
+#define GUSBCFG_ICTRAFFICPULLREMOVE (1 << 27)
+#define GUSBCFG_ICUSBCAP (1 << 26)
+#define GUSBCFG_ULPI_INT_PROT_DIS (1 << 25)
+#define GUSBCFG_INDICATORPASSTHROUGH (1 << 24)
+#define GUSBCFG_INDICATORCOMPLEMENT (1 << 23)
+#define GUSBCFG_TERMSELDLPULSE (1 << 22)
+#define GUSBCFG_ULPI_INT_VBUS_IND (1 << 21)
+#define GUSBCFG_ULPI_EXT_VBUS_DRV (1 << 20)
+#define GUSBCFG_ULPI_CLK_SUSP_M (1 << 19)
+#define GUSBCFG_ULPI_AUTO_RES (1 << 18)
+#define GUSBCFG_ULPI_FS_LS (1 << 17)
+#define GUSBCFG_OTG_UTMI_FS_SEL (1 << 16)
+#define GUSBCFG_PHY_LP_CLK_SEL (1 << 15)
+#define GUSBCFG_USBTRDTIM_MASK (0xf << 10)
+#define GUSBCFG_USBTRDTIM_SHIFT 10
+#define GUSBCFG_HNPCAP (1 << 9)
+#define GUSBCFG_SRPCAP (1 << 8)
+#define GUSBCFG_DDRSEL (1 << 7)
+#define GUSBCFG_PHYSEL (1 << 6)
+#define GUSBCFG_FSINTF (1 << 5)
+#define GUSBCFG_ULPI_UTMI_SEL (1 << 4)
+#define GUSBCFG_PHYIF16 (1 << 3)
+#define GUSBCFG_TOUTCAL_MASK (0x7 << 0)
+#define GUSBCFG_TOUTCAL_SHIFT 0
+#define GUSBCFG_TOUTCAL_LIMIT 0x7
+#define GUSBCFG_TOUTCAL(_x) ((_x) << 0)
+
+#define GRSTCTL HSOTG_REG(0x010)
+#define GRSTCTL_AHBIDLE (1 << 31)
+#define GRSTCTL_DMAREQ (1 << 30)
+#define GRSTCTL_TXFNUM_MASK (0x1f << 6)
+#define GRSTCTL_TXFNUM_SHIFT 6
+#define GRSTCTL_TXFNUM_LIMIT 0x1f
+#define GRSTCTL_TXFNUM(_x) ((_x) << 6)
+#define GRSTCTL_TXFFLSH (1 << 5)
+#define GRSTCTL_RXFFLSH (1 << 4)
+#define GRSTCTL_IN_TKNQ_FLSH (1 << 3)
+#define GRSTCTL_FRMCNTRRST (1 << 2)
+#define GRSTCTL_HSFTRST (1 << 1)
+#define GRSTCTL_CSFTRST (1 << 0)
+
+#define GINTSTS HSOTG_REG(0x014)
+#define GINTMSK HSOTG_REG(0x018)
+#define GINTSTS_WKUPINT (1 << 31)
+#define GINTSTS_SESSREQINT (1 << 30)
+#define GINTSTS_DISCONNINT (1 << 29)
+#define GINTSTS_CONIDSTSCHNG (1 << 28)
+#define GINTSTS_LPMTRANRCVD (1 << 27)
+#define GINTSTS_PTXFEMP (1 << 26)
+#define GINTSTS_HCHINT (1 << 25)
+#define GINTSTS_PRTINT (1 << 24)
+#define GINTSTS_RESETDET (1 << 23)
+#define GINTSTS_FET_SUSP (1 << 22)
+#define GINTSTS_INCOMPL_IP (1 << 21)
+#define GINTSTS_INCOMPL_SOIN (1 << 20)
+#define GINTSTS_OEPINT (1 << 19)
+#define GINTSTS_IEPINT (1 << 18)
+#define GINTSTS_EPMIS (1 << 17)
+#define GINTSTS_RESTOREDONE (1 << 16)
+#define GINTSTS_EOPF (1 << 15)
+#define GINTSTS_ISOUTDROP (1 << 14)
+#define GINTSTS_ENUMDONE (1 << 13)
+#define GINTSTS_USBRST (1 << 12)
+#define GINTSTS_USBSUSP (1 << 11)
+#define GINTSTS_ERLYSUSP (1 << 10)
+#define GINTSTS_I2CINT (1 << 9)
+#define GINTSTS_ULPI_CK_INT (1 << 8)
+#define GINTSTS_GOUTNAKEFF (1 << 7)
+#define GINTSTS_GINNAKEFF (1 << 6)
+#define GINTSTS_NPTXFEMP (1 << 5)
+#define GINTSTS_RXFLVL (1 << 4)
+#define GINTSTS_SOF (1 << 3)
+#define GINTSTS_OTGINT (1 << 2)
+#define GINTSTS_MODEMIS (1 << 1)
+#define GINTSTS_CURMODE_HOST (1 << 0)
+
+#define GRXSTSR HSOTG_REG(0x01C)
+#define GRXSTSP HSOTG_REG(0x020)
+#define GRXSTS_FN_MASK (0x7f << 25)
+#define GRXSTS_FN_SHIFT 25
+#define GRXSTS_PKTSTS_MASK (0xf << 17)
+#define GRXSTS_PKTSTS_SHIFT 17
+#define GRXSTS_PKTSTS_GLOBALOUTNAK 1
+#define GRXSTS_PKTSTS_OUTRX 2
+#define GRXSTS_PKTSTS_HCHIN 2
+#define GRXSTS_PKTSTS_OUTDONE 3
+#define GRXSTS_PKTSTS_HCHIN_XFER_COMP 3
+#define GRXSTS_PKTSTS_SETUPDONE 4
+#define GRXSTS_PKTSTS_DATATOGGLEERR 5
+#define GRXSTS_PKTSTS_SETUPRX 6
+#define GRXSTS_PKTSTS_HCHHALTED 7
+#define GRXSTS_HCHNUM_MASK (0xf << 0)
+#define GRXSTS_HCHNUM_SHIFT 0
+#define GRXSTS_DPID_MASK (0x3 << 15)
+#define GRXSTS_DPID_SHIFT 15
+#define GRXSTS_BYTECNT_MASK (0x7ff << 4)
+#define GRXSTS_BYTECNT_SHIFT 4
+#define GRXSTS_EPNUM_MASK (0xf << 0)
+#define GRXSTS_EPNUM_SHIFT 0
+
+#define GRXFSIZ HSOTG_REG(0x024)
+#define GRXFSIZ_DEPTH_MASK (0xffff << 0)
+#define GRXFSIZ_DEPTH_SHIFT 0
+
+#define GNPTXFSIZ HSOTG_REG(0x028)
+/* Use FIFOSIZE_* constants to access this register */
+
+#define GNPTXSTS HSOTG_REG(0x02C)
+#define GNPTXSTS_NP_TXQ_TOP_MASK (0x7f << 24)
+#define GNPTXSTS_NP_TXQ_TOP_SHIFT 24
+#define GNPTXSTS_NP_TXQ_SPC_AVAIL_MASK (0xff << 16)
+#define GNPTXSTS_NP_TXQ_SPC_AVAIL_SHIFT 16
+#define GNPTXSTS_NP_TXQ_SPC_AVAIL_GET(_v) (((_v) >> 16) & 0xff)
+#define GNPTXSTS_NP_TXF_SPC_AVAIL_MASK (0xffff << 0)
+#define GNPTXSTS_NP_TXF_SPC_AVAIL_SHIFT 0
+#define GNPTXSTS_NP_TXF_SPC_AVAIL_GET(_v) (((_v) >> 0) & 0xffff)
+
+#define GI2CCTL HSOTG_REG(0x0030)
+#define GI2CCTL_BSYDNE (1 << 31)
+#define GI2CCTL_RW (1 << 30)
+#define GI2CCTL_I2CDATSE0 (1 << 28)
+#define GI2CCTL_I2CDEVADDR_MASK (0x3 << 26)
+#define GI2CCTL_I2CDEVADDR_SHIFT 26
+#define GI2CCTL_I2CSUSPCTL (1 << 25)
+#define GI2CCTL_ACK (1 << 24)
+#define GI2CCTL_I2CEN (1 << 23)
+#define GI2CCTL_ADDR_MASK (0x7f << 16)
+#define GI2CCTL_ADDR_SHIFT 16
+#define GI2CCTL_REGADDR_MASK (0xff << 8)
+#define GI2CCTL_REGADDR_SHIFT 8
+#define GI2CCTL_RWDATA_MASK (0xff << 0)
+#define GI2CCTL_RWDATA_SHIFT 0
+
+#define GPVNDCTL HSOTG_REG(0x0034)
+#define GGPIO HSOTG_REG(0x0038)
+#define GUID HSOTG_REG(0x003c)
+#define GSNPSID HSOTG_REG(0x0040)
+#define GHWCFG1 HSOTG_REG(0x0044)
+
+#define GHWCFG2 HSOTG_REG(0x0048)
+#define GHWCFG2_OTG_ENABLE_IC_USB (1 << 31)
+#define GHWCFG2_DEV_TOKEN_Q_DEPTH_MASK (0x1f << 26)
+#define GHWCFG2_DEV_TOKEN_Q_DEPTH_SHIFT 26
+#define GHWCFG2_HOST_PERIO_TX_Q_DEPTH_MASK (0x3 << 24)
+#define GHWCFG2_HOST_PERIO_TX_Q_DEPTH_SHIFT 24
+#define GHWCFG2_NONPERIO_TX_Q_DEPTH_MASK (0x3 << 22)
+#define GHWCFG2_NONPERIO_TX_Q_DEPTH_SHIFT 22
+#define GHWCFG2_MULTI_PROC_INT (1 << 20)
+#define GHWCFG2_DYNAMIC_FIFO (1 << 19)
+#define GHWCFG2_PERIO_EP_SUPPORTED (1 << 18)
+#define GHWCFG2_NUM_HOST_CHAN_MASK (0xf << 14)
+#define GHWCFG2_NUM_HOST_CHAN_SHIFT 14
+#define GHWCFG2_NUM_DEV_EP_MASK (0xf << 10)
+#define GHWCFG2_NUM_DEV_EP_SHIFT 10
+#define GHWCFG2_FS_PHY_TYPE_MASK (0x3 << 8)
+#define GHWCFG2_FS_PHY_TYPE_SHIFT 8
+#define GHWCFG2_FS_PHY_TYPE_NOT_SUPPORTED 0
+#define GHWCFG2_FS_PHY_TYPE_DEDICATED 1
+#define GHWCFG2_FS_PHY_TYPE_SHARED_UTMI 2
+#define GHWCFG2_FS_PHY_TYPE_SHARED_ULPI 3
+#define GHWCFG2_HS_PHY_TYPE_MASK (0x3 << 6)
+#define GHWCFG2_HS_PHY_TYPE_SHIFT 6
+#define GHWCFG2_HS_PHY_TYPE_NOT_SUPPORTED 0
+#define GHWCFG2_HS_PHY_TYPE_UTMI 1
+#define GHWCFG2_HS_PHY_TYPE_ULPI 2
+#define GHWCFG2_HS_PHY_TYPE_UTMI_ULPI 3
+#define GHWCFG2_POINT2POINT (1 << 5)
+#define GHWCFG2_ARCHITECTURE_MASK (0x3 << 3)
+#define GHWCFG2_ARCHITECTURE_SHIFT 3
+#define GHWCFG2_SLAVE_ONLY_ARCH 0
+#define GHWCFG2_EXT_DMA_ARCH 1
+#define GHWCFG2_INT_DMA_ARCH 2
+#define GHWCFG2_OP_MODE_MASK (0x7 << 0)
+#define GHWCFG2_OP_MODE_SHIFT 0
+#define GHWCFG2_OP_MODE_HNP_SRP_CAPABLE 0
+#define GHWCFG2_OP_MODE_SRP_ONLY_CAPABLE 1
+#define GHWCFG2_OP_MODE_NO_HNP_SRP_CAPABLE 2
+#define GHWCFG2_OP_MODE_SRP_CAPABLE_DEVICE 3
+#define GHWCFG2_OP_MODE_NO_SRP_CAPABLE_DEVICE 4
+#define GHWCFG2_OP_MODE_SRP_CAPABLE_HOST 5
+#define GHWCFG2_OP_MODE_NO_SRP_CAPABLE_HOST 6
+#define GHWCFG2_OP_MODE_UNDEFINED 7
+
+#define GHWCFG3 HSOTG_REG(0x004c)
+#define GHWCFG3_DFIFO_DEPTH_MASK (0xffff << 16)
+#define GHWCFG3_DFIFO_DEPTH_SHIFT 16
+#define GHWCFG3_OTG_LPM_EN (1 << 15)
+#define GHWCFG3_BC_SUPPORT (1 << 14)
+#define GHWCFG3_OTG_ENABLE_HSIC (1 << 13)
+#define GHWCFG3_ADP_SUPP (1 << 12)
+#define GHWCFG3_SYNCH_RESET_TYPE (1 << 11)
+#define GHWCFG3_OPTIONAL_FEATURES (1 << 10)
+#define GHWCFG3_VENDOR_CTRL_IF (1 << 9)
+#define GHWCFG3_I2C (1 << 8)
+#define GHWCFG3_OTG_FUNC (1 << 7)
+#define GHWCFG3_PACKET_SIZE_CNTR_WIDTH_MASK (0x7 << 4)
+#define GHWCFG3_PACKET_SIZE_CNTR_WIDTH_SHIFT 4
+#define GHWCFG3_XFER_SIZE_CNTR_WIDTH_MASK (0xf << 0)
+#define GHWCFG3_XFER_SIZE_CNTR_WIDTH_SHIFT 0
+
+#define GHWCFG4 HSOTG_REG(0x0050)
+#define GHWCFG4_DESC_DMA_DYN (1 << 31)
+#define GHWCFG4_DESC_DMA (1 << 30)
+#define GHWCFG4_NUM_IN_EPS_MASK (0xf << 26)
+#define GHWCFG4_NUM_IN_EPS_SHIFT 26
+#define GHWCFG4_DED_FIFO_EN (1 << 25)
+#define GHWCFG4_SESSION_END_FILT_EN (1 << 24)
+#define GHWCFG4_B_VALID_FILT_EN (1 << 23)
+#define GHWCFG4_A_VALID_FILT_EN (1 << 22)
+#define GHWCFG4_VBUS_VALID_FILT_EN (1 << 21)
+#define GHWCFG4_IDDIG_FILT_EN (1 << 20)
+#define GHWCFG4_NUM_DEV_MODE_CTRL_EP_MASK (0xf << 16)
+#define GHWCFG4_NUM_DEV_MODE_CTRL_EP_SHIFT 16
+#define GHWCFG4_UTMI_PHY_DATA_WIDTH_MASK (0x3 << 14)
+#define GHWCFG4_UTMI_PHY_DATA_WIDTH_SHIFT 14
+#define GHWCFG4_UTMI_PHY_DATA_WIDTH_8 0
+#define GHWCFG4_UTMI_PHY_DATA_WIDTH_16 1
+#define GHWCFG4_UTMI_PHY_DATA_WIDTH_8_OR_16 2
+#define GHWCFG4_XHIBER (1 << 7)
+#define GHWCFG4_HIBER (1 << 6)
+#define GHWCFG4_MIN_AHB_FREQ (1 << 5)
+#define GHWCFG4_POWER_OPTIMIZ (1 << 4)
+#define GHWCFG4_NUM_DEV_PERIO_IN_EP_MASK (0xf << 0)
+#define GHWCFG4_NUM_DEV_PERIO_IN_EP_SHIFT 0
+
+#define GLPMCFG HSOTG_REG(0x0054)
+#define GLPMCFG_INV_SEL_HSIC (1 << 31)
+#define GLPMCFG_HSIC_CONNECT (1 << 30)
+#define GLPMCFG_RETRY_COUNT_STS_MASK (0x7 << 25)
+#define GLPMCFG_RETRY_COUNT_STS_SHIFT 25
+#define GLPMCFG_SEND_LPM (1 << 24)
+#define GLPMCFG_RETRY_COUNT_MASK (0x7 << 21)
+#define GLPMCFG_RETRY_COUNT_SHIFT 21
+#define GLPMCFG_LPM_CHAN_INDEX_MASK (0xf << 17)
+#define GLPMCFG_LPM_CHAN_INDEX_SHIFT 17
+#define GLPMCFG_SLEEP_STATE_RESUMEOK (1 << 16)
+#define GLPMCFG_PRT_SLEEP_STS (1 << 15)
+#define GLPMCFG_LPM_RESP_MASK (0x3 << 13)
+#define GLPMCFG_LPM_RESP_SHIFT 13
+#define GLPMCFG_HIRD_THRES_MASK (0x1f << 8)
+#define GLPMCFG_HIRD_THRES_SHIFT 8
+#define GLPMCFG_HIRD_THRES_EN (0x10 << 8)
+#define GLPMCFG_EN_UTMI_SLEEP (1 << 7)
+#define GLPMCFG_REM_WKUP_EN (1 << 6)
+#define GLPMCFG_HIRD_MASK (0xf << 2)
+#define GLPMCFG_HIRD_SHIFT 2
+#define GLPMCFG_APPL_RESP (1 << 1)
+#define GLPMCFG_LPM_CAP_EN (1 << 0)
+
+#define GPWRDN HSOTG_REG(0x0058)
+#define GPWRDN_MULT_VAL_ID_BC_MASK (0x1f << 24)
+#define GPWRDN_MULT_VAL_ID_BC_SHIFT 24
+#define GPWRDN_ADP_INT (1 << 23)
+#define GPWRDN_BSESSVLD (1 << 22)
+#define GPWRDN_IDSTS (1 << 21)
+#define GPWRDN_LINESTATE_MASK (0x3 << 19)
+#define GPWRDN_LINESTATE_SHIFT 19
+#define GPWRDN_STS_CHGINT_MSK (1 << 18)
+#define GPWRDN_STS_CHGINT (1 << 17)
+#define GPWRDN_SRP_DET_MSK (1 << 16)
+#define GPWRDN_SRP_DET (1 << 15)
+#define GPWRDN_CONNECT_DET_MSK (1 << 14)
+#define GPWRDN_CONNECT_DET (1 << 13)
+#define GPWRDN_DISCONN_DET_MSK (1 << 12)
+#define GPWRDN_DISCONN_DET (1 << 11)
+#define GPWRDN_RST_DET_MSK (1 << 10)
+#define GPWRDN_RST_DET (1 << 9)
+#define GPWRDN_LNSTSCHG_MSK (1 << 8)
+#define GPWRDN_LNSTSCHG (1 << 7)
+#define GPWRDN_DIS_VBUS (1 << 6)
+#define GPWRDN_PWRDNSWTCH (1 << 5)
+#define GPWRDN_PWRDNRSTN (1 << 4)
+#define GPWRDN_PWRDNCLMP (1 << 3)
+#define GPWRDN_RESTORE (1 << 2)
+#define GPWRDN_PMUACTV (1 << 1)
+#define GPWRDN_PMUINTSEL (1 << 0)
+
+#define GDFIFOCFG HSOTG_REG(0x005c)
+#define GDFIFOCFG_EPINFOBASE_MASK (0xffff << 16)
+#define GDFIFOCFG_EPINFOBASE_SHIFT 16
+#define GDFIFOCFG_GDFIFOCFG_MASK (0xffff << 0)
+#define GDFIFOCFG_GDFIFOCFG_SHIFT 0
+
+#define ADPCTL HSOTG_REG(0x0060)
+#define ADPCTL_AR_MASK (0x3 << 27)
+#define ADPCTL_AR_SHIFT 27
+#define ADPCTL_ADP_TMOUT_INT_MSK (1 << 26)
+#define ADPCTL_ADP_SNS_INT_MSK (1 << 25)
+#define ADPCTL_ADP_PRB_INT_MSK (1 << 24)
+#define ADPCTL_ADP_TMOUT_INT (1 << 23)
+#define ADPCTL_ADP_SNS_INT (1 << 22)
+#define ADPCTL_ADP_PRB_INT (1 << 21)
+#define ADPCTL_ADPENA (1 << 20)
+#define ADPCTL_ADPRES (1 << 19)
+#define ADPCTL_ENASNS (1 << 18)
+#define ADPCTL_ENAPRB (1 << 17)
+#define ADPCTL_RTIM_MASK (0x7ff << 6)
+#define ADPCTL_RTIM_SHIFT 6
+#define ADPCTL_PRB_PER_MASK (0x3 << 4)
+#define ADPCTL_PRB_PER_SHIFT 4
+#define ADPCTL_PRB_DELTA_MASK (0x3 << 2)
+#define ADPCTL_PRB_DELTA_SHIFT 2
+#define ADPCTL_PRB_DSCHRG_MASK (0x3 << 0)
+#define ADPCTL_PRB_DSCHRG_SHIFT 0
+
+#define HPTXFSIZ HSOTG_REG(0x100)
+/* Use FIFOSIZE_* constants to access this register */
+
+#define DPTXFSIZN(_a) HSOTG_REG(0x104 + (((_a) - 1) * 4))
+/* Use FIFOSIZE_* constants to access this register */
+
+/* These apply to the GNPTXFSIZ, HPTXFSIZ and DPTXFSIZN registers */
+#define FIFOSIZE_DEPTH_MASK (0xffff << 16)
+#define FIFOSIZE_DEPTH_SHIFT 16
+#define FIFOSIZE_STARTADDR_MASK (0xffff << 0)
+#define FIFOSIZE_STARTADDR_SHIFT 0
+
+/* Device mode registers */
+
+#define DCFG HSOTG_REG(0x800)
+#define DCFG_EPMISCNT_MASK (0x1f << 18)
+#define DCFG_EPMISCNT_SHIFT 18
+#define DCFG_EPMISCNT_LIMIT 0x1f
+#define DCFG_EPMISCNT(_x) ((_x) << 18)
+#define DCFG_PERFRINT_MASK (0x3 << 11)
+#define DCFG_PERFRINT_SHIFT 11
+#define DCFG_PERFRINT_LIMIT 0x3
+#define DCFG_PERFRINT(_x) ((_x) << 11)
+#define DCFG_DEVADDR_MASK (0x7f << 4)
+#define DCFG_DEVADDR_SHIFT 4
+#define DCFG_DEVADDR_LIMIT 0x7f
+#define DCFG_DEVADDR(_x) ((_x) << 4)
+#define DCFG_NZ_STS_OUT_HSHK (1 << 2)
+#define DCFG_DEVSPD_MASK (0x3 << 0)
+#define DCFG_DEVSPD_SHIFT 0
+#define DCFG_DEVSPD_HS 0
+#define DCFG_DEVSPD_FS 1
+#define DCFG_DEVSPD_LS 2
+#define DCFG_DEVSPD_FS48 3
+
+#define DCTL HSOTG_REG(0x804)
+#define DCTL_PWRONPRGDONE (1 << 11)
+#define DCTL_CGOUTNAK (1 << 10)
+#define DCTL_SGOUTNAK (1 << 9)
+#define DCTL_CGNPINNAK (1 << 8)
+#define DCTL_SGNPINNAK (1 << 7)
+#define DCTL_TSTCTL_MASK (0x7 << 4)
+#define DCTL_TSTCTL_SHIFT 4
+#define DCTL_GOUTNAKSTS (1 << 3)
+#define DCTL_GNPINNAKSTS (1 << 2)
+#define DCTL_SFTDISCON (1 << 1)
+#define DCTL_RMTWKUPSIG (1 << 0)
+
+#define DSTS HSOTG_REG(0x808)
+#define DSTS_SOFFN_MASK (0x3fff << 8)
+#define DSTS_SOFFN_SHIFT 8
+#define DSTS_SOFFN_LIMIT 0x3fff
+#define DSTS_SOFFN(_x) ((_x) << 8)
+#define DSTS_ERRATICERR (1 << 3)
+#define DSTS_ENUMSPD_MASK (0x3 << 1)
+#define DSTS_ENUMSPD_SHIFT 1
+#define DSTS_ENUMSPD_HS 0
+#define DSTS_ENUMSPD_FS 1
+#define DSTS_ENUMSPD_LS 2
+#define DSTS_ENUMSPD_FS48 3
+#define DSTS_SUSPSTS (1 << 0)
+
+#define DIEPMSK HSOTG_REG(0x810)
+#define DIEPMSK_TXFIFOEMPTY (1 << 7)
+#define DIEPMSK_INEPNAKEFFMSK (1 << 6)
+#define DIEPMSK_INTKNEPMISMSK (1 << 5)
+#define DIEPMSK_INTKNTXFEMPMSK (1 << 4)
+#define DIEPMSK_TIMEOUTMSK (1 << 3)
+#define DIEPMSK_AHBERRMSK (1 << 2)
+#define DIEPMSK_EPDISBLDMSK (1 << 1)
+#define DIEPMSK_XFERCOMPLMSK (1 << 0)
+
+#define DOEPMSK HSOTG_REG(0x814)
+#define DOEPMSK_BACK2BACKSETUP (1 << 6)
+#define DOEPMSK_OUTTKNEPDISMSK (1 << 4)
+#define DOEPMSK_SETUPMSK (1 << 3)
+#define DOEPMSK_AHBERRMSK (1 << 2)
+#define DOEPMSK_EPDISBLDMSK (1 << 1)
+#define DOEPMSK_XFERCOMPLMSK (1 << 0)
+
+#define DAINT HSOTG_REG(0x818)
+#define DAINTMSK HSOTG_REG(0x81C)
+#define DAINT_OUTEP_SHIFT 16
+#define DAINT_OUTEP(_x) (1 << ((_x) + 16))
+#define DAINT_INEP(_x) (1 << (_x))
+
+#define DTKNQR1 HSOTG_REG(0x820)
+#define DTKNQR2 HSOTG_REG(0x824)
+#define DTKNQR3 HSOTG_REG(0x830)
+#define DTKNQR4 HSOTG_REG(0x834)
+
+#define DVBUSDIS HSOTG_REG(0x828)
+#define DVBUSPULSE HSOTG_REG(0x82C)
+
+#define DIEPCTL0 HSOTG_REG(0x900)
+#define DIEPCTL(_a) HSOTG_REG(0x900 + ((_a) * 0x20))
+
+#define DOEPCTL0 HSOTG_REG(0xB00)
+#define DOEPCTL(_a) HSOTG_REG(0xB00 + ((_a) * 0x20))
+
+/* EP0 specialness:
+ * bits[29..28] - reserved (no SetD0PID, SetD1PID)
+ * bits[25..22] - should always be zero, this isn't a periodic endpoint
+ * bits[10..0] - MPS setting different for EP0
+ */
+#define D0EPCTL_MPS_MASK (0x3 << 0)
+#define D0EPCTL_MPS_SHIFT 0
+#define D0EPCTL_MPS_64 0
+#define D0EPCTL_MPS_32 1
+#define D0EPCTL_MPS_16 2
+#define D0EPCTL_MPS_8 3
+
+#define DXEPCTL_EPENA (1 << 31)
+#define DXEPCTL_EPDIS (1 << 30)
+#define DXEPCTL_SETD1PID (1 << 29)
+#define DXEPCTL_SETODDFR (1 << 29)
+#define DXEPCTL_SETD0PID (1 << 28)
+#define DXEPCTL_SETEVENFR (1 << 28)
+#define DXEPCTL_SNAK (1 << 27)
+#define DXEPCTL_CNAK (1 << 26)
+#define DXEPCTL_TXFNUM_MASK (0xf << 22)
+#define DXEPCTL_TXFNUM_SHIFT 22
+#define DXEPCTL_TXFNUM_LIMIT 0xf
+#define DXEPCTL_TXFNUM(_x) ((_x) << 22)
+#define DXEPCTL_STALL (1 << 21)
+#define DXEPCTL_SNP (1 << 20)
+#define DXEPCTL_EPTYPE_MASK (0x3 << 18)
+#define DXEPCTL_EPTYPE_SHIFT 18
+#define DXEPCTL_EPTYPE_CONTROL 0
+#define DXEPCTL_EPTYPE_ISO 1
+#define DXEPCTL_EPTYPE_BULK 2
+#define DXEPCTL_EPTYPE_INTTERUPT 3
+#define DXEPCTL_NAKSTS (1 << 17)
+#define DXEPCTL_DPID (1 << 16)
+#define DXEPCTL_EOFRNUM (1 << 16)
+#define DXEPCTL_USBACTEP (1 << 15)
+#define DXEPCTL_NEXTEP_MASK (0xf << 11)
+#define DXEPCTL_NEXTEP_SHIFT 11
+#define DXEPCTL_NEXTEP_LIMIT 0xf
+#define DXEPCTL_NEXTEP(_x) ((_x) << 11)
+#define DXEPCTL_MPS_MASK (0x7ff << 0)
+#define DXEPCTL_MPS_SHIFT 0
+#define DXEPCTL_MPS_LIMIT 0x7ff
+#define DXEPCTL_MPS(_x) ((_x) << 0)
+
+#define DIEPINT(_a) HSOTG_REG(0x908 + ((_a) * 0x20))
+#define DOEPINT(_a) HSOTG_REG(0xB08 + ((_a) * 0x20))
+#define DXEPINT_INEPNAKEFF (1 << 6)
+#define DXEPINT_BACK2BACKSETUP (1 << 6)
+#define DXEPINT_INTKNEPMIS (1 << 5)
+#define DXEPINT_INTKNTXFEMP (1 << 4)
+#define DXEPINT_OUTTKNEPDIS (1 << 4)
+#define DXEPINT_TIMEOUT (1 << 3)
+#define DXEPINT_SETUP (1 << 3)
+#define DXEPINT_AHBERR (1 << 2)
+#define DXEPINT_EPDISBLD (1 << 1)
+#define DXEPINT_XFERCOMPL (1 << 0)
+
+#define DIEPTSIZ0 HSOTG_REG(0x910)
+#define DIEPTSIZ0_PKTCNT_MASK (0x3 << 19)
+#define DIEPTSIZ0_PKTCNT_SHIFT 19
+#define DIEPTSIZ0_PKTCNT_LIMIT 0x3
+#define DIEPTSIZ0_PKTCNT(_x) ((_x) << 19)
+#define DIEPTSIZ0_XFERSIZE_MASK (0x7f << 0)
+#define DIEPTSIZ0_XFERSIZE_SHIFT 0
+#define DIEPTSIZ0_XFERSIZE_LIMIT 0x7f
+#define DIEPTSIZ0_XFERSIZE(_x) ((_x) << 0)
+
+#define DOEPTSIZ0 HSOTG_REG(0xB10)
+#define DOEPTSIZ0_SUPCNT_MASK (0x3 << 29)
+#define DOEPTSIZ0_SUPCNT_SHIFT 29
+#define DOEPTSIZ0_SUPCNT_LIMIT 0x3
+#define DOEPTSIZ0_SUPCNT(_x) ((_x) << 29)
+#define DOEPTSIZ0_PKTCNT (1 << 19)
+#define DOEPTSIZ0_XFERSIZE_MASK (0x7f << 0)
+#define DOEPTSIZ0_XFERSIZE_SHIFT 0
+
+#define DIEPTSIZ(_a) HSOTG_REG(0x910 + ((_a) * 0x20))
+#define DOEPTSIZ(_a) HSOTG_REG(0xB10 + ((_a) * 0x20))
+#define DXEPTSIZ_MC_MASK (0x3 << 29)
+#define DXEPTSIZ_MC_SHIFT 29
+#define DXEPTSIZ_MC_LIMIT 0x3
+#define DXEPTSIZ_MC(_x) ((_x) << 29)
+#define DXEPTSIZ_PKTCNT_MASK (0x3ff << 19)
+#define DXEPTSIZ_PKTCNT_SHIFT 19
+#define DXEPTSIZ_PKTCNT_LIMIT 0x3ff
+#define DXEPTSIZ_PKTCNT_GET(_v) (((_v) >> 19) & 0x3ff)
+#define DXEPTSIZ_PKTCNT(_x) ((_x) << 19)
+#define DXEPTSIZ_XFERSIZE_MASK (0x7ffff << 0)
+#define DXEPTSIZ_XFERSIZE_SHIFT 0
+#define DXEPTSIZ_XFERSIZE_LIMIT 0x7ffff
+#define DXEPTSIZ_XFERSIZE_GET(_v) (((_v) >> 0) & 0x7ffff)
+#define DXEPTSIZ_XFERSIZE(_x) ((_x) << 0)
+
+#define DIEPDMA(_a) HSOTG_REG(0x914 + ((_a) * 0x20))
+#define DOEPDMA(_a) HSOTG_REG(0xB14 + ((_a) * 0x20))
+
+#define DTXFSTS(_a) HSOTG_REG(0x918 + ((_a) * 0x20))
+
+#define PCGCTL HSOTG_REG(0x0e00)
+#define PCGCTL_IF_DEV_MODE (1 << 31)
+#define PCGCTL_P2HD_PRT_SPD_MASK (0x3 << 29)
+#define PCGCTL_P2HD_PRT_SPD_SHIFT 29
+#define PCGCTL_P2HD_DEV_ENUM_SPD_MASK (0x3 << 27)
+#define PCGCTL_P2HD_DEV_ENUM_SPD_SHIFT 27
+#define PCGCTL_MAC_DEV_ADDR_MASK (0x7f << 20)
+#define PCGCTL_MAC_DEV_ADDR_SHIFT 20
+#define PCGCTL_MAX_TERMSEL (1 << 19)
+#define PCGCTL_MAX_XCVRSELECT_MASK (0x3 << 17)
+#define PCGCTL_MAX_XCVRSELECT_SHIFT 17
+#define PCGCTL_PORT_POWER (1 << 16)
+#define PCGCTL_PRT_CLK_SEL_MASK (0x3 << 14)
+#define PCGCTL_PRT_CLK_SEL_SHIFT 14
+#define PCGCTL_ESS_REG_RESTORED (1 << 13)
+#define PCGCTL_EXTND_HIBER_SWITCH (1 << 12)
+#define PCGCTL_EXTND_HIBER_PWRCLMP (1 << 11)
+#define PCGCTL_ENBL_EXTND_HIBER (1 << 10)
+#define PCGCTL_RESTOREMODE (1 << 9)
+#define PCGCTL_RESETAFTSUSP (1 << 8)
+#define PCGCTL_DEEP_SLEEP (1 << 7)
+#define PCGCTL_PHY_IN_SLEEP (1 << 6)
+#define PCGCTL_ENBL_SLEEP_GATING (1 << 5)
+#define PCGCTL_RSTPDWNMODULE (1 << 3)
+#define PCGCTL_PWRCLMP (1 << 2)
+#define PCGCTL_GATEHCLK (1 << 1)
+#define PCGCTL_STOPPCLK (1 << 0)
+
+#define EPFIFO(_a) HSOTG_REG(0x1000 + ((_a) * 0x1000))
+
+/* Host Mode Registers */
+
+#define HCFG HSOTG_REG(0x0400)
+#define HCFG_MODECHTIMEN (1 << 31)
+#define HCFG_PERSCHEDENA (1 << 26)
+#define HCFG_FRLISTEN_MASK (0x3 << 24)
+#define HCFG_FRLISTEN_SHIFT 24
+#define HCFG_FRLISTEN_8 (0 << 24)
+#define FRLISTEN_8_SIZE 8
+#define HCFG_FRLISTEN_16 (1 << 24)
+#define FRLISTEN_16_SIZE 16
+#define HCFG_FRLISTEN_32 (2 << 24)
+#define FRLISTEN_32_SIZE 32
+#define HCFG_FRLISTEN_64 (3 << 24)
+#define FRLISTEN_64_SIZE 64
+#define HCFG_DESCDMA (1 << 23)
+#define HCFG_RESVALID_MASK (0xff << 8)
+#define HCFG_RESVALID_SHIFT 8
+#define HCFG_ENA32KHZ (1 << 7)
+#define HCFG_FSLSSUPP (1 << 2)
+#define HCFG_FSLSPCLKSEL_MASK (0x3 << 0)
+#define HCFG_FSLSPCLKSEL_SHIFT 0
+#define HCFG_FSLSPCLKSEL_30_60_MHZ 0
+#define HCFG_FSLSPCLKSEL_48_MHZ 1
+#define HCFG_FSLSPCLKSEL_6_MHZ 2
+
+#define HFIR HSOTG_REG(0x0404)
+#define HFIR_FRINT_MASK (0xffff << 0)
+#define HFIR_FRINT_SHIFT 0
+#define HFIR_RLDCTRL (1 << 16)
+
+#define HFNUM HSOTG_REG(0x0408)
+#define HFNUM_FRREM_MASK (0xffff << 16)
+#define HFNUM_FRREM_SHIFT 16
+#define HFNUM_FRNUM_MASK (0xffff << 0)
+#define HFNUM_FRNUM_SHIFT 0
+#define HFNUM_MAX_FRNUM 0x3fff
+
+#define HPTXSTS HSOTG_REG(0x0410)
+#define TXSTS_QTOP_ODD (1 << 31)
+#define TXSTS_QTOP_CHNEP_MASK (0xf << 27)
+#define TXSTS_QTOP_CHNEP_SHIFT 27
+#define TXSTS_QTOP_TOKEN_MASK (0x3 << 25)
+#define TXSTS_QTOP_TOKEN_SHIFT 25
+#define TXSTS_QTOP_TERMINATE (1 << 24)
+#define TXSTS_QSPCAVAIL_MASK (0xff << 16)
+#define TXSTS_QSPCAVAIL_SHIFT 16
+#define TXSTS_FSPCAVAIL_MASK (0xffff << 0)
+#define TXSTS_FSPCAVAIL_SHIFT 0
+
+#define HAINT HSOTG_REG(0x0414)
+#define HAINTMSK HSOTG_REG(0x0418)
+#define HFLBADDR HSOTG_REG(0x041c)
+
+#define HPRT0 HSOTG_REG(0x0440)
+#define HPRT0_SPD_MASK (0x3 << 17)
+#define HPRT0_SPD_SHIFT 17
+#define HPRT0_SPD_HIGH_SPEED 0
+#define HPRT0_SPD_FULL_SPEED 1
+#define HPRT0_SPD_LOW_SPEED 2
+#define HPRT0_TSTCTL_MASK (0xf << 13)
+#define HPRT0_TSTCTL_SHIFT 13
+#define HPRT0_PWR (1 << 12)
+#define HPRT0_LNSTS_MASK (0x3 << 10)
+#define HPRT0_LNSTS_SHIFT 10
+#define HPRT0_RST (1 << 8)
+#define HPRT0_SUSP (1 << 7)
+#define HPRT0_RES (1 << 6)
+#define HPRT0_OVRCURRCHG (1 << 5)
+#define HPRT0_OVRCURRACT (1 << 4)
+#define HPRT0_ENACHG (1 << 3)
+#define HPRT0_ENA (1 << 2)
+#define HPRT0_CONNDET (1 << 1)
+#define HPRT0_CONNSTS (1 << 0)
+
+#define HCCHAR(_ch) HSOTG_REG(0x0500 + 0x20 * (_ch))
+#define HCCHAR_CHENA (1 << 31)
+#define HCCHAR_CHDIS (1 << 30)
+#define HCCHAR_ODDFRM (1 << 29)
+#define HCCHAR_DEVADDR_MASK (0x7f << 22)
+#define HCCHAR_DEVADDR_SHIFT 22
+#define HCCHAR_MULTICNT_MASK (0x3 << 20)
+#define HCCHAR_MULTICNT_SHIFT 20
+#define HCCHAR_EPTYPE_MASK (0x3 << 18)
+#define HCCHAR_EPTYPE_SHIFT 18
+#define HCCHAR_LSPDDEV (1 << 17)
+#define HCCHAR_EPDIR (1 << 15)
+#define HCCHAR_EPNUM_MASK (0xf << 11)
+#define HCCHAR_EPNUM_SHIFT 11
+#define HCCHAR_MPS_MASK (0x7ff << 0)
+#define HCCHAR_MPS_SHIFT 0
+
+#define HCSPLT(_ch) HSOTG_REG(0x0504 + 0x20 * (_ch))
+#define HCSPLT_SPLTENA (1 << 31)
+#define HCSPLT_COMPSPLT (1 << 16)
+#define HCSPLT_XACTPOS_MASK (0x3 << 14)
+#define HCSPLT_XACTPOS_SHIFT 14
+#define HCSPLT_XACTPOS_MID 0
+#define HCSPLT_XACTPOS_END 1
+#define HCSPLT_XACTPOS_BEGIN 2
+#define HCSPLT_XACTPOS_ALL 3
+#define HCSPLT_HUBADDR_MASK (0x7f << 7)
+#define HCSPLT_HUBADDR_SHIFT 7
+#define HCSPLT_PRTADDR_MASK (0x7f << 0)
+#define HCSPLT_PRTADDR_SHIFT 0
+
+#define HCINT(_ch) HSOTG_REG(0x0508 + 0x20 * (_ch))
+#define HCINTMSK(_ch) HSOTG_REG(0x050c + 0x20 * (_ch))
+#define HCINTMSK_RESERVED14_31 (0x3ffff << 14)
+#define HCINTMSK_FRM_LIST_ROLL (1 << 13)
+#define HCINTMSK_XCS_XACT (1 << 12)
+#define HCINTMSK_BNA (1 << 11)
+#define HCINTMSK_DATATGLERR (1 << 10)
+#define HCINTMSK_FRMOVRUN (1 << 9)
+#define HCINTMSK_BBLERR (1 << 8)
+#define HCINTMSK_XACTERR (1 << 7)
+#define HCINTMSK_NYET (1 << 6)
+#define HCINTMSK_ACK (1 << 5)
+#define HCINTMSK_NAK (1 << 4)
+#define HCINTMSK_STALL (1 << 3)
+#define HCINTMSK_AHBERR (1 << 2)
+#define HCINTMSK_CHHLTD (1 << 1)
+#define HCINTMSK_XFERCOMPL (1 << 0)
+
+#define HCTSIZ(_ch) HSOTG_REG(0x0510 + 0x20 * (_ch))
+#define TSIZ_DOPNG (1 << 31)
+#define TSIZ_SC_MC_PID_MASK (0x3 << 29)
+#define TSIZ_SC_MC_PID_SHIFT 29
+#define TSIZ_SC_MC_PID_DATA0 0
+#define TSIZ_SC_MC_PID_DATA2 1
+#define TSIZ_SC_MC_PID_DATA1 2
+#define TSIZ_SC_MC_PID_MDATA 3
+#define TSIZ_SC_MC_PID_SETUP 3
+#define TSIZ_PKTCNT_MASK (0x3ff << 19)
+#define TSIZ_PKTCNT_SHIFT 19
+#define TSIZ_NTD_MASK (0xff << 8)
+#define TSIZ_NTD_SHIFT 8
+#define TSIZ_SCHINFO_MASK (0xff << 0)
+#define TSIZ_SCHINFO_SHIFT 0
+#define TSIZ_XFERSIZE_MASK (0x7ffff << 0)
+#define TSIZ_XFERSIZE_SHIFT 0
+
+#define HCDMA(_ch) HSOTG_REG(0x0514 + 0x20 * (_ch))
+#define HCDMA_DMA_ADDR_MASK (0x1fffff << 11)
+#define HCDMA_DMA_ADDR_SHIFT 11
+#define HCDMA_CTD_MASK (0xff << 3)
+#define HCDMA_CTD_SHIFT 3
+
+#define HCDMAB(_ch) HSOTG_REG(0x051c + 0x20 * (_ch))
+
+#define HCFIFO(_ch) HSOTG_REG(0x1000 + 0x1000 * (_ch))
+
+/**
+ * struct dwc2_hcd_dma_desc - Host-mode DMA descriptor structure
+ *
+ * @status: DMA descriptor status quadlet
+ * @buf: DMA descriptor data buffer pointer
+ *
+ * DMA Descriptor structure contains two quadlets:
+ * Status quadlet and Data buffer pointer.
+ */
+struct dwc2_hcd_dma_desc {
+ u32 status;
+ u32 buf;
+};
+
+#define HOST_DMA_A (1 << 31)
+#define HOST_DMA_STS_MASK (0x3 << 28)
+#define HOST_DMA_STS_SHIFT 28
+#define HOST_DMA_STS_PKTERR (1 << 28)
+#define HOST_DMA_EOL (1 << 26)
+#define HOST_DMA_IOC (1 << 25)
+#define HOST_DMA_SUP (1 << 24)
+#define HOST_DMA_ALT_QTD (1 << 23)
+#define HOST_DMA_QTD_OFFSET_MASK (0x3f << 17)
+#define HOST_DMA_QTD_OFFSET_SHIFT 17
+#define HOST_DMA_ISOC_NBYTES_MASK (0xfff << 0)
+#define HOST_DMA_ISOC_NBYTES_SHIFT 0
+#define HOST_DMA_NBYTES_MASK (0x1ffff << 0)
+#define HOST_DMA_NBYTES_SHIFT 0
+
+#define MAX_DMA_DESC_SIZE 131071
+#define MAX_DMA_DESC_NUM_GENERIC 64
+#define MAX_DMA_DESC_NUM_HS_ISOC 256
+
+#endif /* __DWC2_HW_H__ */
--- /dev/null
+/*
+ * pci.c - DesignWare HS OTG Controller PCI driver
+ *
+ * Copyright (C) 2004-2013 Synopsys, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Provides the initialization and cleanup entry points for the DWC_otg PCI
+ * driver
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/usb.h>
+
+#include <linux/usb/hcd.h>
+#include <linux/usb/ch11.h>
+
+#include "core.h"
+#include "hcd.h"
+
+#define PCI_VENDOR_ID_SYNOPSYS 0x16c3
+#define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0
+
+static const char dwc2_driver_name[] = "dwc2";
+
+static const struct dwc2_core_params dwc2_module_params = {
+ .otg_cap = -1,
+ .otg_ver = -1,
+ .dma_enable = -1,
+ .dma_desc_enable = 0,
+ .speed = -1,
+ .enable_dynamic_fifo = -1,
+ .en_multiple_tx_fifo = -1,
+ .host_rx_fifo_size = 1024,
+ .host_nperio_tx_fifo_size = 256,
+ .host_perio_tx_fifo_size = 1024,
+ .max_transfer_size = 65535,
+ .max_packet_count = 511,
+ .host_channels = -1,
+ .phy_type = -1,
+ .phy_utmi_width = -1,
+ .phy_ulpi_ddr = -1,
+ .phy_ulpi_ext_vbus = -1,
+ .i2c_enable = -1,
+ .ulpi_fs_ls = -1,
+ .host_support_fs_ls_low_power = -1,
+ .host_ls_low_power_phy_clk = -1,
+ .ts_dline = -1,
+ .reload_ctl = -1,
+ .ahbcfg = -1,
+ .uframe_sched = -1,
+};
+
+/**
+ * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
+ * DWC_otg driver
+ *
+ * @dev: Bus device
+ *
+ * This routine is called, for example, when the rmmod command is executed. The
+ * device may or may not be electrically present. If it is present, the driver
+ * stops device processing. Any resources used on behalf of this device are
+ * freed.
+ */
+static void dwc2_driver_remove(struct pci_dev *dev)
+{
+ struct dwc2_hsotg *hsotg = pci_get_drvdata(dev);
+
+ dwc2_hcd_remove(hsotg);
+ pci_disable_device(dev);
+}
+
+/**
+ * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
+ * driver
+ *
+ * @dev: Bus device
+ *
+ * This routine creates the driver components required to control the device
+ * (core, HCD, and PCD) and initializes the device. The driver components are
+ * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
+ * in the device private data. This allows the driver to access the dwc2_hsotg
+ * structure on subsequent calls to driver methods for this device.
+ */
+static int dwc2_driver_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ struct dwc2_hsotg *hsotg;
+ int retval;
+
+ hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
+ if (!hsotg)
+ return -ENOMEM;
+
+ hsotg->dev = &dev->dev;
+ hsotg->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);
+ if (IS_ERR(hsotg->regs))
+ return PTR_ERR(hsotg->regs);
+
+ dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
+ (unsigned long)pci_resource_start(dev, 0), hsotg->regs);
+
+ if (pci_enable_device(dev) < 0)
+ return -ENODEV;
+
+ pci_set_master(dev);
+
+ retval = dwc2_hcd_init(hsotg, dev->irq, &dwc2_module_params);
+ if (retval) {
+ pci_disable_device(dev);
+ return retval;
+ }
+
+ pci_set_drvdata(dev, hsotg);
+
+ return retval;
+}
+
+static const struct pci_device_id dwc2_pci_ids[] = {
+ {
+ PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
+ },
+ {
+ PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
+ PCI_DEVICE_ID_STMICRO_USB_OTG),
+ },
+ { /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
+
+static struct pci_driver dwc2_pci_driver = {
+ .name = dwc2_driver_name,
+ .id_table = dwc2_pci_ids,
+ .probe = dwc2_driver_probe,
+ .remove = dwc2_driver_remove,
+};
+
+module_pci_driver(dwc2_pci_driver);
+
+MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
+MODULE_AUTHOR("Synopsys, Inc.");
+MODULE_LICENSE("Dual BSD/GPL");
--- /dev/null
+/*
+ * platform.c - DesignWare HS OTG Controller platform driver
+ *
+ * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include "core.h"
+#include "hcd.h"
+
+static const char dwc2_driver_name[] = "dwc2";
+
+static const struct dwc2_core_params params_bcm2835 = {
+ .otg_cap = 0, /* HNP/SRP capable */
+ .otg_ver = 0, /* 1.3 */
+ .dma_enable = 1,
+ .dma_desc_enable = 0,
+ .speed = 0, /* High Speed */
+ .enable_dynamic_fifo = 1,
+ .en_multiple_tx_fifo = 1,
+ .host_rx_fifo_size = 774, /* 774 DWORDs */
+ .host_nperio_tx_fifo_size = 256, /* 256 DWORDs */
+ .host_perio_tx_fifo_size = 512, /* 512 DWORDs */
+ .max_transfer_size = 65535,
+ .max_packet_count = 511,
+ .host_channels = 8,
+ .phy_type = 1, /* UTMI */
+ .phy_utmi_width = 8, /* 8 bits */
+ .phy_ulpi_ddr = 0, /* Single */
+ .phy_ulpi_ext_vbus = 0,
+ .i2c_enable = 0,
+ .ulpi_fs_ls = 0,
+ .host_support_fs_ls_low_power = 0,
+ .host_ls_low_power_phy_clk = 0, /* 48 MHz */
+ .ts_dline = 0,
+ .reload_ctl = 0,
+ .ahbcfg = 0x10,
+ .uframe_sched = 0,
+};
+
+/**
+ * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
+ * DWC_otg driver
+ *
+ * @dev: Platform device
+ *
+ * This routine is called, for example, when the rmmod command is executed. The
+ * device may or may not be electrically present. If it is present, the driver
+ * stops device processing. Any resources used on behalf of this device are
+ * freed.
+ */
+static int dwc2_driver_remove(struct platform_device *dev)
+{
+ struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
+
+ dwc2_hcd_remove(hsotg);
+
+ return 0;
+}
+
+static const struct of_device_id dwc2_of_match_table[] = {
+ { .compatible = "brcm,bcm2835-usb", .data = ¶ms_bcm2835 },
+ { .compatible = "snps,dwc2", .data = NULL },
+ {},
+};
+MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
+
+/**
+ * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
+ * driver
+ *
+ * @dev: Platform device
+ *
+ * This routine creates the driver components required to control the device
+ * (core, HCD, and PCD) and initializes the device. The driver components are
+ * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
+ * in the device private data. This allows the driver to access the dwc2_hsotg
+ * structure on subsequent calls to driver methods for this device.
+ */
+static int dwc2_driver_probe(struct platform_device *dev)
+{
+ const struct of_device_id *match;
+ const struct dwc2_core_params *params;
+ struct dwc2_core_params defparams;
+ struct dwc2_hsotg *hsotg;
+ struct resource *res;
+ int retval;
+ int irq;
+
+ match = of_match_device(dwc2_of_match_table, &dev->dev);
+ if (match && match->data) {
+ params = match->data;
+ } else {
+ /* Default all params to autodetect */
+ dwc2_set_all_params(&defparams, -1);
+ params = &defparams;
+ }
+
+ hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
+ if (!hsotg)
+ return -ENOMEM;
+
+ hsotg->dev = &dev->dev;
+
+ /*
+ * Use reasonable defaults so platforms don't have to provide these.
+ */
+ if (!dev->dev.dma_mask)
+ dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
+ retval = dma_set_coherent_mask(&dev->dev, DMA_BIT_MASK(32));
+ if (retval)
+ return retval;
+
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0) {
+ dev_err(&dev->dev, "missing IRQ resource\n");
+ return irq;
+ }
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ hsotg->regs = devm_ioremap_resource(&dev->dev, res);
+ if (IS_ERR(hsotg->regs))
+ return PTR_ERR(hsotg->regs);
+
+ dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
+ (unsigned long)res->start, hsotg->regs);
+
+ retval = dwc2_hcd_init(hsotg, irq, params);
+ if (retval)
+ return retval;
+
+ platform_set_drvdata(dev, hsotg);
+
+ return retval;
+}
+
+static struct platform_driver dwc2_platform_driver = {
+ .driver = {
+ .name = dwc2_driver_name,
+ .of_match_table = dwc2_of_match_table,
+ },
+ .probe = dwc2_driver_probe,
+ .remove = dwc2_driver_remove,
+};
+
+module_platform_driver(dwc2_platform_driver);
+
+MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
+MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
+MODULE_LICENSE("Dual BSD/GPL");
projects / deliverable / linux.git / commitdiff
