arch/mips/ath79/dev-usb.c

   1 /*
   2  *  Atheros AR7XXX/AR9XXX USB Host Controller device
   3  *
   4  *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Parts of this file are based on Atheros' 2.6.15 BSP
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/delay.h>
  17 #include <linux/irq.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/usb/ehci_pdriver.h>
  21 #include <linux/usb/ohci_pdriver.h>
  22
  23 #include <asm/mach-ath79/ath79.h>
  24 #include <asm/mach-ath79/ar71xx_regs.h>
  25 #include "common.h"
  26 #include "dev-usb.h"
  27
  28 static struct resource ath79_ohci_resources[] = {
  29         [0] = {
  30                 /* .start and .end fields are filled dynamically */
  31                 .flags  = IORESOURCE_MEM,
  32         },
  33         [1] = {
  34                 .start  = ATH79_MISC_IRQ_OHCI,
  35                 .end    = ATH79_MISC_IRQ_OHCI,
  36                 .flags  = IORESOURCE_IRQ,
  37         },
  38 };
  39
  40 static u64 ath79_ohci_dmamask = DMA_BIT_MASK(32);
  41
  42 static struct usb_ohci_pdata ath79_ohci_pdata = {
  43 };
  44
  45 static struct platform_device ath79_ohci_device = {
  46         .name           = "ohci-platform",
  47         .id             = -1,
  48         .resource       = ath79_ohci_resources,
  49         .num_resources  = ARRAY_SIZE(ath79_ohci_resources),
  50         .dev = {
  51                 .dma_mask               = &ath79_ohci_dmamask,
  52                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  53                 .platform_data          = &ath79_ohci_pdata,
  54         },
  55 };
  56
  57 static struct resource ath79_ehci_resources[] = {
  58         [0] = {
  59                 /* .start and .end fields are filled dynamically */
  60                 .flags  = IORESOURCE_MEM,
  61         },
  62         [1] = {
  63                 .start  = ATH79_CPU_IRQ_USB,
  64                 .end    = ATH79_CPU_IRQ_USB,
  65                 .flags  = IORESOURCE_IRQ,
  66         },
  67 };
  68
  69 static u64 ath79_ehci_dmamask = DMA_BIT_MASK(32);
  70
  71 static struct usb_ehci_pdata ath79_ehci_pdata_v1 = {
  72         .has_synopsys_hc_bug    = 1,
  73         .port_power_off         = 1,
  74 };
  75
  76 static struct usb_ehci_pdata ath79_ehci_pdata_v2 = {
  77         .caps_offset            = 0x100,
  78         .has_tt                 = 1,
  79         .port_power_off         = 1,
  80 };
  81
  82 static struct platform_device ath79_ehci_device = {
  83         .name           = "ehci-platform",
  84         .id             = -1,
  85         .resource       = ath79_ehci_resources,
  86         .num_resources  = ARRAY_SIZE(ath79_ehci_resources),
  87         .dev = {
  88                 .dma_mask               = &ath79_ehci_dmamask,
  89                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  90         },
  91 };
  92
  93 #define AR71XX_USB_RESET_MASK   (AR71XX_RESET_USB_HOST | \
  94                                  AR71XX_RESET_USB_PHY | \
  95                                  AR71XX_RESET_USB_OHCI_DLL)
  96
  97 static void __init ath79_usb_setup(void)
  98 {
  99         void __iomem *usb_ctrl_base;
 100
 101         ath79_device_reset_set(AR71XX_USB_RESET_MASK);
 102         mdelay(1000);
 103         ath79_device_reset_clear(AR71XX_USB_RESET_MASK);
 104
 105         usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
 106
 107         /* Turning on the Buff and Desc swap bits */
 108         __raw_writel(0xf0000, usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG);
 109
 110         /* WAR for HW bug. Here it adjusts the duration between two SOFS */
 111         __raw_writel(0x20c00, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
 112
 113         iounmap(usb_ctrl_base);
 114
 115         mdelay(900);
 116
 117         ath79_ohci_resources[0].start = AR71XX_OHCI_BASE;
 118         ath79_ohci_resources[0].end = AR71XX_OHCI_BASE + AR71XX_OHCI_SIZE - 1;
 119         platform_device_register(&ath79_ohci_device);
 120
 121         ath79_ehci_resources[0].start = AR71XX_EHCI_BASE;
 122         ath79_ehci_resources[0].end = AR71XX_EHCI_BASE + AR71XX_EHCI_SIZE - 1;
 123         ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v1;
 124         platform_device_register(&ath79_ehci_device);
 125 }
 126
 127 static void __init ar7240_usb_setup(void)
 128 {
 129         void __iomem *usb_ctrl_base;
 130
 131         ath79_device_reset_clear(AR7240_RESET_OHCI_DLL);
 132         ath79_device_reset_set(AR7240_RESET_USB_HOST);
 133
 134         mdelay(1000);
 135
 136         ath79_device_reset_set(AR7240_RESET_OHCI_DLL);
 137         ath79_device_reset_clear(AR7240_RESET_USB_HOST);
 138
 139         usb_ctrl_base = ioremap(AR7240_USB_CTRL_BASE, AR7240_USB_CTRL_SIZE);
 140
 141         /* WAR for HW bug. Here it adjusts the duration between two SOFS */
 142         __raw_writel(0x3, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
 143
 144         iounmap(usb_ctrl_base);
 145
 146         ath79_ohci_resources[0].start = AR7240_OHCI_BASE;
 147         ath79_ohci_resources[0].end = AR7240_OHCI_BASE + AR7240_OHCI_SIZE - 1;
 148         platform_device_register(&ath79_ohci_device);
 149 }
 150
 151 static void __init ar724x_usb_setup(void)
 152 {
 153         ath79_device_reset_set(AR724X_RESET_USBSUS_OVERRIDE);
 154         mdelay(10);
 155
 156         ath79_device_reset_clear(AR724X_RESET_USB_HOST);
 157         mdelay(10);
 158
 159         ath79_device_reset_clear(AR724X_RESET_USB_PHY);
 160         mdelay(10);
 161
 162         ath79_ehci_resources[0].start = AR724X_EHCI_BASE;
 163         ath79_ehci_resources[0].end = AR724X_EHCI_BASE + AR724X_EHCI_SIZE - 1;
 164         ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
 165         platform_device_register(&ath79_ehci_device);
 166 }
 167
 168 static void __init ar913x_usb_setup(void)
 169 {
 170         ath79_device_reset_set(AR913X_RESET_USBSUS_OVERRIDE);
 171         mdelay(10);
 172
 173         ath79_device_reset_clear(AR913X_RESET_USB_HOST);
 174         mdelay(10);
 175
 176         ath79_device_reset_clear(AR913X_RESET_USB_PHY);
 177         mdelay(10);
 178
 179         ath79_ehci_resources[0].start = AR913X_EHCI_BASE;
 180         ath79_ehci_resources[0].end = AR913X_EHCI_BASE + AR913X_EHCI_SIZE - 1;
 181         ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
 182         platform_device_register(&ath79_ehci_device);
 183 }
 184
 185 static void __init ar933x_usb_setup(void)
 186 {
 187         ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
 188         mdelay(10);
 189
 190         ath79_device_reset_clear(AR933X_RESET_USB_HOST);
 191         mdelay(10);
 192
 193         ath79_device_reset_clear(AR933X_RESET_USB_PHY);
 194         mdelay(10);
 195
 196         ath79_ehci_resources[0].start = AR933X_EHCI_BASE;
 197         ath79_ehci_resources[0].end = AR933X_EHCI_BASE + AR933X_EHCI_SIZE - 1;
 198         ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
 199         platform_device_register(&ath79_ehci_device);
 200 }
 201
 202 void __init ath79_register_usb(void)
 203 {
 204         if (soc_is_ar71xx())
 205                 ath79_usb_setup();
 206         else if (soc_is_ar7240())
 207                 ar7240_usb_setup();
 208         else if (soc_is_ar7241() || soc_is_ar7242())
 209                 ar724x_usb_setup();
 210         else if (soc_is_ar913x())
 211                 ar913x_usb_setup();
 212         else if (soc_is_ar933x())
 213                 ar933x_usb_setup();
 214         else
 215                 BUG();
 216 }