From: Pavankumar Kondeti Date: Tue, 7 Dec 2010 12:23:55 +0000 (+0530) Subject: USB: Add MSM OTG Controller driver X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=e0c201f339fe7fc38d1b0f6f4755ff627686c7e0;p=deliverable%2Flinux.git USB: Add MSM OTG Controller driver This driver implements PHY initialization, clock management, ULPI IO ops and simple OTG state machine to kick host/peripheral based on Id/VBUS line status. VBUS/Id lines are tied to a reference voltage on some boards. Hence provide debugfs interface to select host/peripheral mode. Signed-off-by: Pavankumar Kondeti Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig index 5ce07528cd0c..915c729872f8 100644 --- a/drivers/usb/otg/Kconfig +++ b/drivers/usb/otg/Kconfig @@ -81,4 +81,14 @@ config USB_LANGWELL_OTG To compile this driver as a module, choose M here: the module will be called langwell_otg. +config USB_MSM_OTG_72K + tristate "OTG support for Qualcomm on-chip USB controller" + depends on (USB || USB_GADGET) && ARCH_MSM + select USB_OTG_UTILS + help + Enable this to support the USB OTG transceiver on MSM chips. It + handles PHY initialization, clock management, and workarounds + required after resetting the hardware. This driver is required + even for peripheral only or host only mode configuration. + endif # USB || OTG diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile index 66f1b83e4fa7..3b1b0960fb68 100644 --- a/drivers/usb/otg/Makefile +++ b/drivers/usb/otg/Makefile @@ -15,3 +15,4 @@ obj-$(CONFIG_TWL4030_USB) += twl4030-usb.o obj-$(CONFIG_USB_LANGWELL_OTG) += langwell_otg.o obj-$(CONFIG_NOP_USB_XCEIV) += nop-usb-xceiv.o obj-$(CONFIG_USB_ULPI) += ulpi.o +obj-$(CONFIG_USB_MSM_OTG_72K) += msm72k_otg.o diff --git a/drivers/usb/otg/msm72k_otg.c b/drivers/usb/otg/msm72k_otg.c new file mode 100644 index 000000000000..46f468a912f4 --- /dev/null +++ b/drivers/usb/otg/msm72k_otg.c @@ -0,0 +1,850 @@ +/* Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include + +#define MSM_USB_BASE (motg->regs) +#define DRIVER_NAME "msm_otg" + +#define ULPI_IO_TIMEOUT_USEC (10 * 1000) +static int ulpi_read(struct otg_transceiver *otg, u32 reg) +{ + struct msm_otg *motg = container_of(otg, struct msm_otg, otg); + int cnt = 0; + + /* initiate read operation */ + writel(ULPI_RUN | ULPI_READ | ULPI_ADDR(reg), + USB_ULPI_VIEWPORT); + + /* wait for completion */ + while (cnt < ULPI_IO_TIMEOUT_USEC) { + if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN)) + break; + udelay(1); + cnt++; + } + + if (cnt >= ULPI_IO_TIMEOUT_USEC) { + dev_err(otg->dev, "ulpi_read: timeout %08x\n", + readl(USB_ULPI_VIEWPORT)); + return -ETIMEDOUT; + } + return ULPI_DATA_READ(readl(USB_ULPI_VIEWPORT)); +} + +static int ulpi_write(struct otg_transceiver *otg, u32 val, u32 reg) +{ + struct msm_otg *motg = container_of(otg, struct msm_otg, otg); + int cnt = 0; + + /* initiate write operation */ + writel(ULPI_RUN | ULPI_WRITE | + ULPI_ADDR(reg) | ULPI_DATA(val), + USB_ULPI_VIEWPORT); + + /* wait for completion */ + while (cnt < ULPI_IO_TIMEOUT_USEC) { + if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN)) + break; + udelay(1); + cnt++; + } + + if (cnt >= ULPI_IO_TIMEOUT_USEC) { + dev_err(otg->dev, "ulpi_write: timeout\n"); + return -ETIMEDOUT; + } + return 0; +} + +static struct otg_io_access_ops msm_otg_io_ops = { + .read = ulpi_read, + .write = ulpi_write, +}; + +static void ulpi_init(struct msm_otg *motg) +{ + struct msm_otg_platform_data *pdata = motg->pdata; + int *seq = pdata->phy_init_seq; + + if (!seq) + return; + + while (seq[0] >= 0) { + dev_vdbg(motg->otg.dev, "ulpi: write 0x%02x to 0x%02x\n", + seq[0], seq[1]); + ulpi_write(&motg->otg, seq[0], seq[1]); + seq += 2; + } +} + +static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert) +{ + int ret; + + if (assert) { + ret = clk_reset(motg->clk, CLK_RESET_ASSERT); + if (ret) + dev_err(motg->otg.dev, "usb hs_clk assert failed\n"); + } else { + ret = clk_reset(motg->clk, CLK_RESET_DEASSERT); + if (ret) + dev_err(motg->otg.dev, "usb hs_clk deassert failed\n"); + } + return ret; +} + +static int msm_otg_phy_clk_reset(struct msm_otg *motg) +{ + int ret; + + ret = clk_reset(motg->phy_reset_clk, CLK_RESET_ASSERT); + if (ret) { + dev_err(motg->otg.dev, "usb phy clk assert failed\n"); + return ret; + } + usleep_range(10000, 12000); + ret = clk_reset(motg->phy_reset_clk, CLK_RESET_DEASSERT); + if (ret) + dev_err(motg->otg.dev, "usb phy clk deassert failed\n"); + return ret; +} + +static int msm_otg_phy_reset(struct msm_otg *motg) +{ + u32 val; + int ret; + int retries; + + ret = msm_otg_link_clk_reset(motg, 1); + if (ret) + return ret; + ret = msm_otg_phy_clk_reset(motg); + if (ret) + return ret; + ret = msm_otg_link_clk_reset(motg, 0); + if (ret) + return ret; + + val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK; + writel(val | PORTSC_PTS_ULPI, USB_PORTSC); + + for (retries = 3; retries > 0; retries--) { + ret = ulpi_write(&motg->otg, ULPI_FUNC_CTRL_SUSPENDM, + ULPI_CLR(ULPI_FUNC_CTRL)); + if (!ret) + break; + ret = msm_otg_phy_clk_reset(motg); + if (ret) + return ret; + } + if (!retries) + return -ETIMEDOUT; + + /* This reset calibrates the phy, if the above write succeeded */ + ret = msm_otg_phy_clk_reset(motg); + if (ret) + return ret; + + for (retries = 3; retries > 0; retries--) { + ret = ulpi_read(&motg->otg, ULPI_DEBUG); + if (ret != -ETIMEDOUT) + break; + ret = msm_otg_phy_clk_reset(motg); + if (ret) + return ret; + } + if (!retries) + return -ETIMEDOUT; + + dev_info(motg->otg.dev, "phy_reset: success\n"); + return 0; +} + +#define LINK_RESET_TIMEOUT_USEC (250 * 1000) +static int msm_otg_reset(struct otg_transceiver *otg) +{ + struct msm_otg *motg = container_of(otg, struct msm_otg, otg); + struct msm_otg_platform_data *pdata = motg->pdata; + int cnt = 0; + int ret; + u32 val = 0; + u32 ulpi_val = 0; + + ret = msm_otg_phy_reset(motg); + if (ret) { + dev_err(otg->dev, "phy_reset failed\n"); + return ret; + } + + ulpi_init(motg); + + writel(USBCMD_RESET, USB_USBCMD); + while (cnt < LINK_RESET_TIMEOUT_USEC) { + if (!(readl(USB_USBCMD) & USBCMD_RESET)) + break; + udelay(1); + cnt++; + } + if (cnt >= LINK_RESET_TIMEOUT_USEC) + return -ETIMEDOUT; + + /* select ULPI phy */ + writel(0x80000000, USB_PORTSC); + + msleep(100); + + writel(0x0, USB_AHBBURST); + writel(0x00, USB_AHBMODE); + + if (pdata->otg_control == OTG_PHY_CONTROL) { + val = readl(USB_OTGSC); + if (pdata->mode == USB_OTG) { + ulpi_val = ULPI_INT_IDGRD | ULPI_INT_SESS_VALID; + val |= OTGSC_IDIE | OTGSC_BSVIE; + } else if (pdata->mode == USB_PERIPHERAL) { + ulpi_val = ULPI_INT_SESS_VALID; + val |= OTGSC_BSVIE; + } + writel(val, USB_OTGSC); + ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_RISE); + ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_FALL); + } + + return 0; +} + +static void msm_otg_start_host(struct otg_transceiver *otg, int on) +{ + struct msm_otg *motg = container_of(otg, struct msm_otg, otg); + struct msm_otg_platform_data *pdata = motg->pdata; + struct usb_hcd *hcd; + + if (!otg->host) + return; + + hcd = bus_to_hcd(otg->host); + + if (on) { + dev_dbg(otg->dev, "host on\n"); + + if (pdata->vbus_power) + pdata->vbus_power(1); + /* + * Some boards have a switch cotrolled by gpio + * to enable/disable internal HUB. Enable internal + * HUB before kicking the host. + */ + if (pdata->setup_gpio) + pdata->setup_gpio(OTG_STATE_A_HOST); +#ifdef CONFIG_USB + usb_add_hcd(hcd, hcd->irq, IRQF_SHARED); +#endif + } else { + dev_dbg(otg->dev, "host off\n"); + +#ifdef CONFIG_USB + usb_remove_hcd(hcd); +#endif + if (pdata->setup_gpio) + pdata->setup_gpio(OTG_STATE_UNDEFINED); + if (pdata->vbus_power) + pdata->vbus_power(0); + } +} + +static int msm_otg_set_host(struct otg_transceiver *otg, struct usb_bus *host) +{ + struct msm_otg *motg = container_of(otg, struct msm_otg, otg); + struct usb_hcd *hcd; + + /* + * Fail host registration if this board can support + * only peripheral configuration. + */ + if (motg->pdata->mode == USB_PERIPHERAL) { + dev_info(otg->dev, "Host mode is not supported\n"); + return -ENODEV; + } + + if (!host) { + if (otg->state == OTG_STATE_A_HOST) { + msm_otg_start_host(otg, 0); + otg->host = NULL; + otg->state = OTG_STATE_UNDEFINED; + schedule_work(&motg->sm_work); + } else { + otg->host = NULL; + } + + return 0; + } + + hcd = bus_to_hcd(host); + hcd->power_budget = motg->pdata->power_budget; + + otg->host = host; + dev_dbg(otg->dev, "host driver registered w/ tranceiver\n"); + + /* + * Kick the state machine work, if peripheral is not supported + * or peripheral is already registered with us. + */ + if (motg->pdata->mode == USB_HOST || otg->gadget) + schedule_work(&motg->sm_work); + + return 0; +} + +static void msm_otg_start_peripheral(struct otg_transceiver *otg, int on) +{ + struct msm_otg *motg = container_of(otg, struct msm_otg, otg); + struct msm_otg_platform_data *pdata = motg->pdata; + + if (!otg->gadget) + return; + + if (on) { + dev_dbg(otg->dev, "gadget on\n"); + /* + * Some boards have a switch cotrolled by gpio + * to enable/disable internal HUB. Disable internal + * HUB before kicking the gadget. + */ + if (pdata->setup_gpio) + pdata->setup_gpio(OTG_STATE_B_PERIPHERAL); + usb_gadget_vbus_connect(otg->gadget); + } else { + dev_dbg(otg->dev, "gadget off\n"); + usb_gadget_vbus_disconnect(otg->gadget); + if (pdata->setup_gpio) + pdata->setup_gpio(OTG_STATE_UNDEFINED); + } + +} + +static int msm_otg_set_peripheral(struct otg_transceiver *otg, + struct usb_gadget *gadget) +{ + struct msm_otg *motg = container_of(otg, struct msm_otg, otg); + + /* + * Fail peripheral registration if this board can support + * only host configuration. + */ + if (motg->pdata->mode == USB_HOST) { + dev_info(otg->dev, "Peripheral mode is not supported\n"); + return -ENODEV; + } + + if (!gadget) { + if (otg->state == OTG_STATE_B_PERIPHERAL) { + msm_otg_start_peripheral(otg, 0); + otg->gadget = NULL; + otg->state = OTG_STATE_UNDEFINED; + schedule_work(&motg->sm_work); + } else { + otg->gadget = NULL; + } + + return 0; + } + otg->gadget = gadget; + dev_dbg(otg->dev, "peripheral driver registered w/ tranceiver\n"); + + /* + * Kick the state machine work, if host is not supported + * or host is already registered with us. + */ + if (motg->pdata->mode == USB_PERIPHERAL || otg->host) + schedule_work(&motg->sm_work); + + return 0; +} + +/* + * We support OTG, Peripheral only and Host only configurations. In case + * of OTG, mode switch (host-->peripheral/peripheral-->host) can happen + * via Id pin status or user request (debugfs). Id/BSV interrupts are not + * enabled when switch is controlled by user and default mode is supplied + * by board file, which can be changed by userspace later. + */ +static void msm_otg_init_sm(struct msm_otg *motg) +{ + struct msm_otg_platform_data *pdata = motg->pdata; + u32 otgsc = readl(USB_OTGSC); + + switch (pdata->mode) { + case USB_OTG: + if (pdata->otg_control == OTG_PHY_CONTROL) { + if (otgsc & OTGSC_ID) + set_bit(ID, &motg->inputs); + else + clear_bit(ID, &motg->inputs); + + if (otgsc & OTGSC_BSV) + set_bit(B_SESS_VLD, &motg->inputs); + else + clear_bit(B_SESS_VLD, &motg->inputs); + } else if (pdata->otg_control == OTG_USER_CONTROL) { + if (pdata->default_mode == USB_HOST) { + clear_bit(ID, &motg->inputs); + } else if (pdata->default_mode == USB_PERIPHERAL) { + set_bit(ID, &motg->inputs); + set_bit(B_SESS_VLD, &motg->inputs); + } else { + set_bit(ID, &motg->inputs); + clear_bit(B_SESS_VLD, &motg->inputs); + } + } + break; + case USB_HOST: + clear_bit(ID, &motg->inputs); + break; + case USB_PERIPHERAL: + set_bit(ID, &motg->inputs); + if (otgsc & OTGSC_BSV) + set_bit(B_SESS_VLD, &motg->inputs); + else + clear_bit(B_SESS_VLD, &motg->inputs); + break; + default: + break; + } +} + +static void msm_otg_sm_work(struct work_struct *w) +{ + struct msm_otg *motg = container_of(w, struct msm_otg, sm_work); + struct otg_transceiver *otg = &motg->otg; + + switch (otg->state) { + case OTG_STATE_UNDEFINED: + dev_dbg(otg->dev, "OTG_STATE_UNDEFINED state\n"); + msm_otg_reset(otg); + msm_otg_init_sm(motg); + otg->state = OTG_STATE_B_IDLE; + /* FALL THROUGH */ + case OTG_STATE_B_IDLE: + dev_dbg(otg->dev, "OTG_STATE_B_IDLE state\n"); + if (!test_bit(ID, &motg->inputs) && otg->host) { + /* disable BSV bit */ + writel(readl(USB_OTGSC) & ~OTGSC_BSVIE, USB_OTGSC); + msm_otg_start_host(otg, 1); + otg->state = OTG_STATE_A_HOST; + } else if (test_bit(B_SESS_VLD, &motg->inputs) && otg->gadget) { + msm_otg_start_peripheral(otg, 1); + otg->state = OTG_STATE_B_PERIPHERAL; + } + break; + case OTG_STATE_B_PERIPHERAL: + dev_dbg(otg->dev, "OTG_STATE_B_PERIPHERAL state\n"); + if (!test_bit(B_SESS_VLD, &motg->inputs) || + !test_bit(ID, &motg->inputs)) { + msm_otg_start_peripheral(otg, 0); + otg->state = OTG_STATE_B_IDLE; + msm_otg_reset(otg); + schedule_work(w); + } + break; + case OTG_STATE_A_HOST: + dev_dbg(otg->dev, "OTG_STATE_A_HOST state\n"); + if (test_bit(ID, &motg->inputs)) { + msm_otg_start_host(otg, 0); + otg->state = OTG_STATE_B_IDLE; + msm_otg_reset(otg); + schedule_work(w); + } + break; + default: + break; + } +} + +static irqreturn_t msm_otg_irq(int irq, void *data) +{ + struct msm_otg *motg = data; + struct otg_transceiver *otg = &motg->otg; + u32 otgsc = 0; + + otgsc = readl(USB_OTGSC); + if (!(otgsc & (OTGSC_IDIS | OTGSC_BSVIS))) + return IRQ_NONE; + + if ((otgsc & OTGSC_IDIS) && (otgsc & OTGSC_IDIE)) { + if (otgsc & OTGSC_ID) + set_bit(ID, &motg->inputs); + else + clear_bit(ID, &motg->inputs); + dev_dbg(otg->dev, "ID set/clear\n"); + } else if ((otgsc & OTGSC_BSVIS) && (otgsc & OTGSC_BSVIE)) { + if (otgsc & OTGSC_BSV) + set_bit(B_SESS_VLD, &motg->inputs); + else + clear_bit(B_SESS_VLD, &motg->inputs); + dev_dbg(otg->dev, "BSV set/clear\n"); + } + + writel(otgsc, USB_OTGSC); + schedule_work(&motg->sm_work); + return IRQ_HANDLED; +} + +static int msm_otg_mode_show(struct seq_file *s, void *unused) +{ + struct msm_otg *motg = s->private; + struct otg_transceiver *otg = &motg->otg; + + switch (otg->state) { + case OTG_STATE_A_HOST: + seq_printf(s, "host\n"); + break; + case OTG_STATE_B_PERIPHERAL: + seq_printf(s, "peripheral\n"); + break; + default: + seq_printf(s, "none\n"); + break; + } + + return 0; +} + +static int msm_otg_mode_open(struct inode *inode, struct file *file) +{ + return single_open(file, msm_otg_mode_show, inode->i_private); +} + +static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct msm_otg *motg = file->private_data; + char buf[16]; + struct otg_transceiver *otg = &motg->otg; + int status = count; + enum usb_mode_type req_mode; + + memset(buf, 0x00, sizeof(buf)); + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) { + status = -EFAULT; + goto out; + } + + if (!strncmp(buf, "host", 4)) { + req_mode = USB_HOST; + } else if (!strncmp(buf, "peripheral", 10)) { + req_mode = USB_PERIPHERAL; + } else if (!strncmp(buf, "none", 4)) { + req_mode = USB_NONE; + } else { + status = -EINVAL; + goto out; + } + + switch (req_mode) { + case USB_NONE: + switch (otg->state) { + case OTG_STATE_A_HOST: + case OTG_STATE_B_PERIPHERAL: + set_bit(ID, &motg->inputs); + clear_bit(B_SESS_VLD, &motg->inputs); + break; + default: + goto out; + } + break; + case USB_PERIPHERAL: + switch (otg->state) { + case OTG_STATE_B_IDLE: + case OTG_STATE_A_HOST: + set_bit(ID, &motg->inputs); + set_bit(B_SESS_VLD, &motg->inputs); + break; + default: + goto out; + } + break; + case USB_HOST: + switch (otg->state) { + case OTG_STATE_B_IDLE: + case OTG_STATE_B_PERIPHERAL: + clear_bit(ID, &motg->inputs); + break; + default: + goto out; + } + break; + default: + goto out; + } + + schedule_work(&motg->sm_work); +out: + return status; +} + +const struct file_operations msm_otg_mode_fops = { + .open = msm_otg_mode_open, + .read = seq_read, + .write = msm_otg_mode_write, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct dentry *msm_otg_dbg_root; +static struct dentry *msm_otg_dbg_mode; + +static int msm_otg_debugfs_init(struct msm_otg *motg) +{ + msm_otg_dbg_root = debugfs_create_dir("msm_otg", NULL); + + if (!msm_otg_dbg_root || IS_ERR(msm_otg_dbg_root)) + return -ENODEV; + + msm_otg_dbg_mode = debugfs_create_file("mode", S_IRUGO | S_IWUSR, + msm_otg_dbg_root, motg, &msm_otg_mode_fops); + if (!msm_otg_dbg_mode) { + debugfs_remove(msm_otg_dbg_root); + msm_otg_dbg_root = NULL; + return -ENODEV; + } + + return 0; +} + +static void msm_otg_debugfs_cleanup(void) +{ + debugfs_remove(msm_otg_dbg_mode); + debugfs_remove(msm_otg_dbg_root); +} + +static int __init msm_otg_probe(struct platform_device *pdev) +{ + int ret = 0; + struct resource *res; + struct msm_otg *motg; + struct otg_transceiver *otg; + + dev_info(&pdev->dev, "msm_otg probe\n"); + if (!pdev->dev.platform_data) { + dev_err(&pdev->dev, "No platform data given. Bailing out\n"); + return -ENODEV; + } + + motg = kzalloc(sizeof(struct msm_otg), GFP_KERNEL); + if (!motg) { + dev_err(&pdev->dev, "unable to allocate msm_otg\n"); + return -ENOMEM; + } + + motg->pdata = pdev->dev.platform_data; + otg = &motg->otg; + otg->dev = &pdev->dev; + + motg->phy_reset_clk = clk_get(&pdev->dev, "usb_phy_clk"); + if (IS_ERR(motg->phy_reset_clk)) { + dev_err(&pdev->dev, "failed to get usb_phy_clk\n"); + ret = PTR_ERR(motg->phy_reset_clk); + goto free_motg; + } + + motg->clk = clk_get(&pdev->dev, "usb_hs_clk"); + if (IS_ERR(motg->clk)) { + dev_err(&pdev->dev, "failed to get usb_hs_clk\n"); + ret = PTR_ERR(motg->clk); + goto put_phy_reset_clk; + } + + motg->pclk = clk_get(&pdev->dev, "usb_hs_pclk"); + if (IS_ERR(motg->pclk)) { + dev_err(&pdev->dev, "failed to get usb_hs_pclk\n"); + ret = PTR_ERR(motg->pclk); + goto put_clk; + } + + /* + * USB core clock is not present on all MSM chips. This + * clock is introduced to remove the dependency on AXI + * bus frequency. + */ + motg->core_clk = clk_get(&pdev->dev, "usb_hs_core_clk"); + if (IS_ERR(motg->core_clk)) + motg->core_clk = NULL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "failed to get platform resource mem\n"); + ret = -ENODEV; + goto put_core_clk; + } + + motg->regs = ioremap(res->start, resource_size(res)); + if (!motg->regs) { + dev_err(&pdev->dev, "ioremap failed\n"); + ret = -ENOMEM; + goto put_core_clk; + } + dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs); + + motg->irq = platform_get_irq(pdev, 0); + if (!motg->irq) { + dev_err(&pdev->dev, "platform_get_irq failed\n"); + ret = -ENODEV; + goto free_regs; + } + + clk_enable(motg->clk); + clk_enable(motg->pclk); + if (motg->core_clk) + clk_enable(motg->core_clk); + + writel(0, USB_USBINTR); + writel(0, USB_OTGSC); + + INIT_WORK(&motg->sm_work, msm_otg_sm_work); + ret = request_irq(motg->irq, msm_otg_irq, IRQF_SHARED, + "msm_otg", motg); + if (ret) { + dev_err(&pdev->dev, "request irq failed\n"); + goto disable_clks; + } + + otg->init = msm_otg_reset; + otg->set_host = msm_otg_set_host; + otg->set_peripheral = msm_otg_set_peripheral; + + otg->io_ops = &msm_otg_io_ops; + + ret = otg_set_transceiver(&motg->otg); + if (ret) { + dev_err(&pdev->dev, "otg_set_transceiver failed\n"); + goto free_irq; + } + + platform_set_drvdata(pdev, motg); + device_init_wakeup(&pdev->dev, 1); + + if (motg->pdata->mode == USB_OTG && + motg->pdata->otg_control == OTG_USER_CONTROL) { + ret = msm_otg_debugfs_init(motg); + if (ret) + dev_dbg(&pdev->dev, "mode debugfs file is" + "not available\n"); + } + + return 0; + +free_irq: + free_irq(motg->irq, motg); +disable_clks: + clk_disable(motg->pclk); + clk_disable(motg->clk); +free_regs: + iounmap(motg->regs); +put_core_clk: + if (motg->core_clk) + clk_put(motg->core_clk); + clk_put(motg->pclk); +put_clk: + clk_put(motg->clk); +put_phy_reset_clk: + clk_put(motg->phy_reset_clk); +free_motg: + kfree(motg); + return ret; +} + +static int __devexit msm_otg_remove(struct platform_device *pdev) +{ + struct msm_otg *motg = platform_get_drvdata(pdev); + struct otg_transceiver *otg = &motg->otg; + + if (otg->host || otg->gadget) + return -EBUSY; + + msm_otg_debugfs_cleanup(); + cancel_work_sync(&motg->sm_work); + device_init_wakeup(&pdev->dev, 0); + otg_set_transceiver(NULL); + + free_irq(motg->irq, motg); + + clk_disable(motg->pclk); + clk_disable(motg->clk); + if (motg->core_clk) + clk_disable(motg->core_clk); + + iounmap(motg->regs); + + clk_put(motg->phy_reset_clk); + clk_put(motg->pclk); + clk_put(motg->clk); + if (motg->core_clk) + clk_put(motg->core_clk); + + kfree(motg); + + return 0; +} + +static struct platform_driver msm_otg_driver = { + .remove = __devexit_p(msm_otg_remove), + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, +}; + +static int __init msm_otg_init(void) +{ + return platform_driver_probe(&msm_otg_driver, msm_otg_probe); +} + +static void __exit msm_otg_exit(void) +{ + platform_driver_unregister(&msm_otg_driver); +} + +module_init(msm_otg_init); +module_exit(msm_otg_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MSM USB transceiver driver"); diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h new file mode 100644 index 000000000000..b796df94ec72 --- /dev/null +++ b/include/linux/usb/msm_hsusb.h @@ -0,0 +1,108 @@ +/* linux/include/asm-arm/arch-msm/hsusb.h + * + * Copyright (C) 2008 Google, Inc. + * Author: Brian Swetland + * Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __ASM_ARCH_MSM_HSUSB_H +#define __ASM_ARCH_MSM_HSUSB_H + +#include +#include + +/** + * Supported USB modes + * + * USB_PERIPHERAL Only peripheral mode is supported. + * USB_HOST Only host mode is supported. + * USB_OTG OTG mode is supported. + * + */ +enum usb_mode_type { + USB_NONE = 0, + USB_PERIPHERAL, + USB_HOST, + USB_OTG, +}; + +/** + * OTG control + * + * OTG_NO_CONTROL Id/VBUS notifications not required. Useful in host + * only configuration. + * OTG_PHY_CONTROL Id/VBUS notifications comes form USB PHY. + * OTG_PMIC_CONTROL Id/VBUS notifications comes from PMIC hardware. + * OTG_USER_CONTROL Id/VBUS notifcations comes from User via sysfs. + * + */ +enum otg_control_type { + OTG_NO_CONTROL = 0, + OTG_PHY_CONTROL, + OTG_PMIC_CONTROL, + OTG_USER_CONTROL, +}; + +/** + * struct msm_otg_platform_data - platform device data + * for msm72k_otg driver. + * @phy_init_seq: PHY configuration sequence. val, reg pairs + * terminated by -1. + * @vbus_power: VBUS power on/off routine. + * @power_budget: VBUS power budget in mA (0 will be treated as 500mA). + * @mode: Supported mode (OTG/peripheral/host). + * @otg_control: OTG switch controlled by user/Id pin + * @default_mode: Default operational mode. Applicable only if + * OTG switch is controller by user. + * + */ +struct msm_otg_platform_data { + int *phy_init_seq; + void (*vbus_power)(bool on); + unsigned power_budget; + enum usb_mode_type mode; + enum otg_control_type otg_control; + enum usb_mode_type default_mode; + void (*setup_gpio)(enum usb_otg_state state); +}; + +/** + * struct msm_otg: OTG driver data. Shared by HCD and DCD. + * @otg: USB OTG Transceiver structure. + * @pdata: otg device platform data. + * @irq: IRQ number assigned for HSUSB controller. + * @clk: clock struct of usb_hs_clk. + * @pclk: clock struct of usb_hs_pclk. + * @phy_reset_clk: clock struct of usb_phy_clk. + * @core_clk: clock struct of usb_hs_core_clk. + * @regs: ioremapped register base address. + * @inputs: OTG state machine inputs(Id, SessValid etc). + * @sm_work: OTG state machine work. + * + */ +struct msm_otg { + struct otg_transceiver otg; + struct msm_otg_platform_data *pdata; + int irq; + struct clk *clk; + struct clk *pclk; + struct clk *phy_reset_clk; + struct clk *core_clk; + void __iomem *regs; +#define ID 0 +#define B_SESS_VLD 1 + unsigned long inputs; + struct work_struct sm_work; +}; + +#endif diff --git a/include/linux/usb/msm_hsusb_hw.h b/include/linux/usb/msm_hsusb_hw.h new file mode 100644 index 000000000000..b061cffcf048 --- /dev/null +++ b/include/linux/usb/msm_hsusb_hw.h @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2007 Google, Inc. + * Author: Brian Swetland + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __LINUX_USB_GADGET_MSM72K_UDC_H__ +#define __LINUX_USB_GADGET_MSM72K_UDC_H__ + +#ifdef CONFIG_ARCH_MSM7X00A +#define USB_SBUSCFG (MSM_USB_BASE + 0x0090) +#else +#define USB_AHBBURST (MSM_USB_BASE + 0x0090) +#define USB_AHBMODE (MSM_USB_BASE + 0x0098) +#endif +#define USB_CAPLENGTH (MSM_USB_BASE + 0x0100) /* 8 bit */ + +#define USB_USBCMD (MSM_USB_BASE + 0x0140) +#define USB_PORTSC (MSM_USB_BASE + 0x0184) +#define USB_OTGSC (MSM_USB_BASE + 0x01A4) +#define USB_USBMODE (MSM_USB_BASE + 0x01A8) + +#define USBCMD_RESET 2 +#define USB_USBINTR (MSM_USB_BASE + 0x0148) + +#define PORTSC_PHCD (1 << 23) /* phy suspend mode */ +#define PORTSC_PTS_MASK (3 << 30) +#define PORTSC_PTS_ULPI (3 << 30) + +#define USB_ULPI_VIEWPORT (MSM_USB_BASE + 0x0170) +#define ULPI_RUN (1 << 30) +#define ULPI_WRITE (1 << 29) +#define ULPI_READ (0 << 29) +#define ULPI_ADDR(n) (((n) & 255) << 16) +#define ULPI_DATA(n) ((n) & 255) +#define ULPI_DATA_READ(n) (((n) >> 8) & 255) + +/* OTG definitions */ +#define OTGSC_INTSTS_MASK (0x7f << 16) +#define OTGSC_ID (1 << 8) +#define OTGSC_BSV (1 << 11) +#define OTGSC_IDIS (1 << 16) +#define OTGSC_BSVIS (1 << 19) +#define OTGSC_IDIE (1 << 24) +#define OTGSC_BSVIE (1 << 27) + +#endif /* __LINUX_USB_GADGET_MSM72K_UDC_H__ */