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 u64 ath79_usb_dmamask = DMA_BIT_MASK(32);
  29
  30 static struct usb_ohci_pdata ath79_ohci_pdata = {
  31 };
  32
  33 static struct usb_ehci_pdata ath79_ehci_pdata_v1 = {
  34         .has_synopsys_hc_bug    = 1,
  35 };
  36
  37 static struct usb_ehci_pdata ath79_ehci_pdata_v2 = {
  38         .caps_offset            = 0x100,
  39         .has_tt                 = 1,
  40 };
  41
  42 static void __init ath79_usb_register(const char *name, int id,
  43                                       unsigned long base, unsigned long size,
  44                                       int irq, const void *data,
  45                                       size_t data_size)
  46 {
  47         struct resource res[2];
  48         struct platform_device *pdev;
  49
  50         memset(res, 0, sizeof(res));
  51
  52         res[0].flags = IORESOURCE_MEM;
  53         res[0].start = base;
  54         res[0].end = base + size - 1;
  55
  56         res[1].flags = IORESOURCE_IRQ;
  57         res[1].start = irq;
  58         res[1].end = irq;
  59
  60         pdev = platform_device_register_resndata(NULL, name, id,
  61                                                  res, ARRAY_SIZE(res),
  62                                                  data, data_size);
  63
  64         if (IS_ERR(pdev)) {
  65                 pr_err("ath79: unable to register USB at %08lx, err=%d\n",
  66                        base, (int) PTR_ERR(pdev));
  67                 return;
  68         }
  69
  70         pdev->dev.dma_mask = &ath79_usb_dmamask;
  71         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
  72 }
  73
  74 #define AR71XX_USB_RESET_MASK   (AR71XX_RESET_USB_HOST | \
  75                                  AR71XX_RESET_USB_PHY | \
  76                                  AR71XX_RESET_USB_OHCI_DLL)
  77
  78 static void __init ath79_usb_setup(void)
  79 {
  80         void __iomem *usb_ctrl_base;
  81
  82         ath79_device_reset_set(AR71XX_USB_RESET_MASK);
  83         mdelay(1000);
  84         ath79_device_reset_clear(AR71XX_USB_RESET_MASK);
  85
  86         usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
  87
  88         /* Turning on the Buff and Desc swap bits */
  89         __raw_writel(0xf0000, usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG);
  90
  91         /* WAR for HW bug. Here it adjusts the duration between two SOFS */
  92         __raw_writel(0x20c00, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
  93
  94         iounmap(usb_ctrl_base);
  95
  96         mdelay(900);
  97
  98         ath79_usb_register("ohci-platform", -1,
  99                            AR71XX_OHCI_BASE, AR71XX_OHCI_SIZE,
 100                            ATH79_MISC_IRQ(6),
 101                            &ath79_ohci_pdata, sizeof(ath79_ohci_pdata));
 102
 103         ath79_usb_register("ehci-platform", -1,
 104                            AR71XX_EHCI_BASE, AR71XX_EHCI_SIZE,
 105                            ATH79_CPU_IRQ(3),
 106                            &ath79_ehci_pdata_v1, sizeof(ath79_ehci_pdata_v1));
 107 }
 108
 109 static void __init ar7240_usb_setup(void)
 110 {
 111         void __iomem *usb_ctrl_base;
 112
 113         ath79_device_reset_clear(AR7240_RESET_OHCI_DLL);
 114         ath79_device_reset_set(AR7240_RESET_USB_HOST);
 115
 116         mdelay(1000);
 117
 118         ath79_device_reset_set(AR7240_RESET_OHCI_DLL);
 119         ath79_device_reset_clear(AR7240_RESET_USB_HOST);
 120
 121         usb_ctrl_base = ioremap(AR7240_USB_CTRL_BASE, AR7240_USB_CTRL_SIZE);
 122
 123         /* WAR for HW bug. Here it adjusts the duration between two SOFS */
 124         __raw_writel(0x3, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
 125
 126         iounmap(usb_ctrl_base);
 127
 128         ath79_usb_register("ohci-platform", -1,
 129                            AR7240_OHCI_BASE, AR7240_OHCI_SIZE,
 130                            ATH79_CPU_IRQ(3),
 131                            &ath79_ohci_pdata, sizeof(ath79_ohci_pdata));
 132 }
 133
 134 static void __init ar724x_usb_setup(void)
 135 {
 136         ath79_device_reset_set(AR724X_RESET_USBSUS_OVERRIDE);
 137         mdelay(10);
 138
 139         ath79_device_reset_clear(AR724X_RESET_USB_HOST);
 140         mdelay(10);
 141
 142         ath79_device_reset_clear(AR724X_RESET_USB_PHY);
 143         mdelay(10);
 144
 145         ath79_usb_register("ehci-platform", -1,
 146                            AR724X_EHCI_BASE, AR724X_EHCI_SIZE,
 147                            ATH79_CPU_IRQ(3),
 148                            &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
 149 }
 150
 151 static void __init ar913x_usb_setup(void)
 152 {
 153         ath79_device_reset_set(AR913X_RESET_USBSUS_OVERRIDE);
 154         mdelay(10);
 155
 156         ath79_device_reset_clear(AR913X_RESET_USB_HOST);
 157         mdelay(10);
 158
 159         ath79_device_reset_clear(AR913X_RESET_USB_PHY);
 160         mdelay(10);
 161
 162         ath79_usb_register("ehci-platform", -1,
 163                            AR913X_EHCI_BASE, AR913X_EHCI_SIZE,
 164                            ATH79_CPU_IRQ(3),
 165                            &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
 166 }
 167
 168 static void __init ar933x_usb_setup(void)
 169 {
 170         ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
 171         mdelay(10);
 172
 173         ath79_device_reset_clear(AR933X_RESET_USB_HOST);
 174         mdelay(10);
 175
 176         ath79_device_reset_clear(AR933X_RESET_USB_PHY);
 177         mdelay(10);
 178
 179         ath79_usb_register("ehci-platform", -1,
 180                            AR933X_EHCI_BASE, AR933X_EHCI_SIZE,
 181                            ATH79_CPU_IRQ(3),
 182                            &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
 183 }
 184
 185 static void __init ar934x_usb_setup(void)
 186 {
 187         u32 bootstrap;
 188
 189         bootstrap = ath79_reset_rr(AR934X_RESET_REG_BOOTSTRAP);
 190         if (bootstrap & AR934X_BOOTSTRAP_USB_MODE_DEVICE)
 191                 return;
 192
 193         ath79_device_reset_set(AR934X_RESET_USBSUS_OVERRIDE);
 194         udelay(1000);
 195
 196         ath79_device_reset_clear(AR934X_RESET_USB_PHY);
 197         udelay(1000);
 198
 199         ath79_device_reset_clear(AR934X_RESET_USB_PHY_ANALOG);
 200         udelay(1000);
 201
 202         ath79_device_reset_clear(AR934X_RESET_USB_HOST);
 203         udelay(1000);
 204
 205         ath79_usb_register("ehci-platform", -1,
 206                            AR934X_EHCI_BASE, AR934X_EHCI_SIZE,
 207                            ATH79_CPU_IRQ(3),
 208                            &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
 209 }
 210
 211 static void __init qca955x_usb_setup(void)
 212 {
 213         ath79_usb_register("ehci-platform", 0,
 214                            QCA955X_EHCI0_BASE, QCA955X_EHCI_SIZE,
 215                            ATH79_IP3_IRQ(0),
 216                            &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
 217
 218         ath79_usb_register("ehci-platform", 1,
 219                            QCA955X_EHCI1_BASE, QCA955X_EHCI_SIZE,
 220                            ATH79_IP3_IRQ(1),
 221                            &ath79_ehci_pdata_v2, sizeof(ath79_ehci_pdata_v2));
 222 }
 223
 224 void __init ath79_register_usb(void)
 225 {
 226         if (soc_is_ar71xx())
 227                 ath79_usb_setup();
 228         else if (soc_is_ar7240())
 229                 ar7240_usb_setup();
 230         else if (soc_is_ar7241() || soc_is_ar7242())
 231                 ar724x_usb_setup();
 232         else if (soc_is_ar913x())
 233                 ar913x_usb_setup();
 234         else if (soc_is_ar933x())
 235                 ar933x_usb_setup();
 236         else if (soc_is_ar934x())
 237                 ar934x_usb_setup();
 238         else if (soc_is_qca955x())
 239                 qca955x_usb_setup();
 240         else
 241                 BUG();
 242 }