target/linux/ar71xx/files/arch/mips/ar71xx/dev-usb.c

   1 /*
   2  *  Atheros AR71xx USB host device support
   3  *
   4  *  Copyright (C) 2008-2009 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/dma-mapping.h>
  18 #include <linux/platform_device.h>
  19
  20 #include <asm/mach-ar71xx/ar71xx.h>
  21 #include <asm/mach-ar71xx/platform.h>
  22
  23 #include "dev-usb.h"
  24
  25 /*
  26  * OHCI (USB full speed host controller)
  27  */
  28 static struct resource ar71xx_ohci_resources[] = {
  29         [0] = {
  30                 .start  = AR71XX_OHCI_BASE,
  31                 .end    = AR71XX_OHCI_BASE + AR71XX_OHCI_SIZE - 1,
  32                 .flags  = IORESOURCE_MEM,
  33         },
  34         [1] = {
  35                 .start  = AR71XX_MISC_IRQ_OHCI,
  36                 .end    = AR71XX_MISC_IRQ_OHCI,
  37                 .flags  = IORESOURCE_IRQ,
  38         },
  39 };
  40
  41 static struct resource ar7240_ohci_resources[] = {
  42         [0] = {
  43                 .start  = AR7240_OHCI_BASE,
  44                 .end    = AR7240_OHCI_BASE + AR7240_OHCI_SIZE - 1,
  45                 .flags  = IORESOURCE_MEM,
  46         },
  47         [1] = {
  48                 .start  = AR71XX_CPU_IRQ_USB,
  49                 .end    = AR71XX_CPU_IRQ_USB,
  50                 .flags  = IORESOURCE_IRQ,
  51         },
  52 };
  53
  54 static u64 ar71xx_ohci_dmamask = DMA_BIT_MASK(32);
  55 static struct platform_device ar71xx_ohci_device = {
  56         .name           = "ar71xx-ohci",
  57         .id             = -1,
  58         .resource       = ar71xx_ohci_resources,
  59         .num_resources  = ARRAY_SIZE(ar71xx_ohci_resources),
  60         .dev = {
  61                 .dma_mask               = &ar71xx_ohci_dmamask,
  62                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  63         },
  64 };
  65
  66 /*
  67  * EHCI (USB full speed host controller)
  68  */
  69 static struct resource ar71xx_ehci_resources[] = {
  70         [0] = {
  71                 .start  = AR71XX_EHCI_BASE,
  72                 .end    = AR71XX_EHCI_BASE + AR71XX_EHCI_SIZE - 1,
  73                 .flags  = IORESOURCE_MEM,
  74         },
  75         [1] = {
  76                 .start  = AR71XX_CPU_IRQ_USB,
  77                 .end    = AR71XX_CPU_IRQ_USB,
  78                 .flags  = IORESOURCE_IRQ,
  79         },
  80 };
  81
  82 static u64 ar71xx_ehci_dmamask = DMA_BIT_MASK(32);
  83 static struct ar71xx_ehci_platform_data ar71xx_ehci_data;
  84
  85 static struct platform_device ar71xx_ehci_device = {
  86         .name           = "ar71xx-ehci",
  87         .id             = -1,
  88         .resource       = ar71xx_ehci_resources,
  89         .num_resources  = ARRAY_SIZE(ar71xx_ehci_resources),
  90         .dev = {
  91                 .dma_mask               = &ar71xx_ehci_dmamask,
  92                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  93                 .platform_data          = &ar71xx_ehci_data,
  94         },
  95 };
  96
  97 #define AR71XX_USB_RESET_MASK \
  98         (RESET_MODULE_USB_HOST | RESET_MODULE_USB_PHY \
  99         | RESET_MODULE_USB_OHCI_DLL)
 100
 101 #define AR7240_USB_RESET_MASK \
 102         (RESET_MODULE_USB_HOST | RESET_MODULE_USB_OHCI_DLL_7240)
 103
 104 static void __init ar71xx_usb_setup(void)
 105 {
 106         ar71xx_device_stop(AR71XX_USB_RESET_MASK);
 107         mdelay(1000);
 108         ar71xx_device_start(AR71XX_USB_RESET_MASK);
 109
 110         /* Turning on the Buff and Desc swap bits */
 111         ar71xx_usb_ctrl_wr(USB_CTRL_REG_CONFIG, 0xf0000);
 112
 113         /* WAR for HW bug. Here it adjusts the duration between two SOFS */
 114         ar71xx_usb_ctrl_wr(USB_CTRL_REG_FLADJ, 0x20c00);
 115
 116         mdelay(900);
 117
 118         platform_device_register(&ar71xx_ohci_device);
 119         platform_device_register(&ar71xx_ehci_device);
 120 }
 121
 122 static void __init ar7240_usb_setup(void)
 123 {
 124         ar71xx_device_stop(AR7240_USB_RESET_MASK);
 125         mdelay(1000);
 126         ar71xx_device_start(AR7240_USB_RESET_MASK);
 127
 128         /* WAR for HW bug. Here it adjusts the duration between two SOFS */
 129         ar71xx_usb_ctrl_wr(USB_CTRL_REG_FLADJ, 0x3);
 130
 131         ar71xx_ohci_device.resource = ar7240_ohci_resources;
 132         ar71xx_ohci_device.num_resources = ARRAY_SIZE(ar7240_ohci_resources);
 133
 134         platform_device_register(&ar71xx_ohci_device);
 135 }
 136
 137 static void __init ar91xx_usb_setup(void)
 138 {
 139         ar71xx_device_stop(RESET_MODULE_USBSUS_OVERRIDE);
 140         mdelay(10);
 141
 142         ar71xx_device_start(RESET_MODULE_USB_HOST);
 143         mdelay(10);
 144
 145         ar71xx_device_start(RESET_MODULE_USB_PHY);
 146         mdelay(10);
 147
 148         ar71xx_ehci_data.is_ar91xx = 1;
 149         platform_device_register(&ar71xx_ehci_device);
 150 }
 151
 152 void __init ar71xx_add_device_usb(void)
 153 {
 154         switch (ar71xx_soc) {
 155         case AR71XX_SOC_AR7240:
 156                 ar7240_usb_setup();
 157                 break;
 158
 159         case AR71XX_SOC_AR7130:
 160         case AR71XX_SOC_AR7141:
 161         case AR71XX_SOC_AR7161:
 162                 ar71xx_usb_setup();
 163                 break;
 164
 165         case AR71XX_SOC_AR9130:
 166         case AR71XX_SOC_AR9132:
 167                 ar91xx_usb_setup();
 168                 break;
 169
 170         default:
 171                 BUG();
 172         }
 173 }