target/linux/ramips/patches-3.9/0160-USB-phy-add-ralink-SoC-driver.patch

   1 From efe391a3614b98a0f84fd49e63b4009185ff9a1a Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Thu, 2 May 2013 23:29:08 +0200
   4 Subject: [PATCH 160/164] USB: phy: add ralink SoC driver
   5
   6 Signed-off-by: John Crispin <blogic@openwrt.org>
   7 ---
   8  drivers/usb/phy/Kconfig      |    8 ++
   9  drivers/usb/phy/Makefile     |    1 +
  10  drivers/usb/phy/ralink-phy.c |  191 ++++++++++++++++++++++++++++++++++++++++++
  11  3 files changed, 200 insertions(+)
  12  create mode 100644 drivers/usb/phy/ralink-phy.c
  13
  14 Index: linux-3.9.6/drivers/usb/phy/Kconfig
  15 ===================================================================
  16 --- linux-3.9.6.orig/drivers/usb/phy/Kconfig    2013-06-13 19:52:08.000000000 +0200
  17 +++ linux-3.9.6/drivers/usb/phy/Kconfig 2013-06-23 16:37:57.544772712 +0200
  18 @@ -74,3 +74,11 @@
  19         help
  20           Enable this to support Samsung USB phy controller for samsung
  21           SoCs.
  22 +
  23 +config RALINK_USBPHY
  24 +       bool "Ralink USB PHY controller Driver"
  25 +       depends on MIPS && RALINK
  26 +       select USB_OTG_UTILS
  27 +       help
  28 +         Enable this to support ralink USB phy controller for ralink
  29 +         SoCs.
  30 Index: linux-3.9.6/drivers/usb/phy/Makefile
  31 ===================================================================
  32 --- linux-3.9.6.orig/drivers/usb/phy/Makefile   2013-06-13 19:52:08.000000000 +0200
  33 +++ linux-3.9.6/drivers/usb/phy/Makefile        2013-06-23 16:37:57.544772712 +0200
  34 @@ -12,3 +12,4 @@
  35  obj-$(CONFIG_USB_EHCI_TEGRA)   += tegra_usb_phy.o
  36  obj-$(CONFIG_USB_RCAR_PHY)             += rcar-phy.o
  37  obj-$(CONFIG_SAMSUNG_USBPHY)           += samsung-usbphy.o
  38 +obj-$(CONFIG_RALINK_USBPHY)            += ralink-phy.o
  39 Index: linux-3.9.6/drivers/usb/phy/ralink-phy.c
  40 ===================================================================
  41 --- /dev/null   1970-01-01 00:00:00.000000000 +0000
  42 +++ linux-3.9.6/drivers/usb/phy/ralink-phy.c    2013-06-24 13:55:19.932135036 +0200
  43 @@ -0,0 +1,191 @@
  44 +/*
  45 + * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
  46 + *
  47 + * based on: Renesas R-Car USB phy driver
  48 + *
  49 + * This program is free software; you can redistribute it and/or modify
  50 + * it under the terms of the GNU General Public License version 2 as
  51 + * published by the Free Software Foundation.
  52 + */
  53 +
  54 +#include <linux/delay.h>
  55 +#include <linux/io.h>
  56 +#include <linux/usb/otg.h>
  57 +#include <linux/of_platform.h>
  58 +#include <linux/platform_device.h>
  59 +#include <linux/spinlock.h>
  60 +#include <linux/module.h>
  61 +#include <linux/reset.h>
  62 +
  63 +#include <asm/mach-ralink/ralink_regs.h>
  64 +
  65 +#define RT_SYSC_REG_SYSCFG1            0x014
  66 +#define RT_SYSC_REG_CLKCFG1            0x030
  67 +#define RT_SYSC_REG_USB_PHY_CFG        0x05c
  68 +
  69 +#define RT_RSTCTRL_UDEV                BIT(25)
  70 +#define RT_RSTCTRL_UHST                BIT(22)
  71 +#define RT_SYSCFG1_USB0_HOST_MODE      BIT(10)
  72 +
  73 +#define MT7620_CLKCFG1_UPHY0_CLK_EN    BIT(25)
  74 +#define RT_CLKCFG1_UPHY1_CLK_EN        BIT(20)
  75 +#define RT_CLKCFG1_UPHY0_CLK_EN        BIT(18)
  76 +
  77 +#define USB_PHY_UTMI_8B60M             BIT(1)
  78 +#define UDEV_WAKEUP                    BIT(0)
  79 +
  80 +static atomic_t usb_pwr_ref = ATOMIC_INIT(0);
  81 +static struct reset_control *rstdev;
  82 +static struct reset_control *rsthost;
  83 +static u32 phy_clk;
  84 +
  85 +static void usb_phy_enable(int state)
  86 +{
  87 +       if (state)
  88 +               rt_sysc_m32(0, phy_clk, RT_SYSC_REG_CLKCFG1);
  89 +       else
  90 +               rt_sysc_m32(phy_clk, 0, RT_SYSC_REG_CLKCFG1);
  91 +       mdelay(100);
  92 +}
  93 +
  94 +static int usb_power_on(struct usb_phy *phy)
  95 +{
  96 +       if (atomic_inc_return(&usb_pwr_ref) == 1) {
  97 +               u32 t;
  98 +
  99 +               usb_phy_enable(1);
 100 +
 101 +//             reset_control_assert(rstdev);
 102 +//             reset_control_assert(rsthost);
 103 +
 104 +               if (OTG_STATE_B_HOST) {
 105 +                       rt_sysc_m32(0, RT_SYSCFG1_USB0_HOST_MODE, RT_SYSC_REG_SYSCFG1);
 106 +                       reset_control_deassert(rsthost);
 107 +               } else {
 108 +                       rt_sysc_m32(RT_SYSCFG1_USB0_HOST_MODE, 0, RT_SYSC_REG_SYSCFG1);
 109 +                       reset_control_deassert(rstdev);
 110 +               }
 111 +               mdelay(100);
 112 +
 113 +               t = rt_sysc_r32(RT_SYSC_REG_USB_PHY_CFG);
 114 +               dev_info(phy->dev, "remote usb device wakeup %s\n",
 115 +                               (t & UDEV_WAKEUP) ? ("enabbled") : ("disabled"));
 116 +               if (t & USB_PHY_UTMI_8B60M)
 117 +                       dev_info(phy->dev, "UTMI 8bit 60MHz\n");
 118 +               else
 119 +                       dev_info(phy->dev, "UTMI 16bit 30MHz\n");
 120 +       }
 121 +
 122 +       return 0;
 123 +}
 124 +
 125 +static void usb_power_off(struct usb_phy *phy)
 126 +{
 127 +       if (atomic_dec_return(&usb_pwr_ref) == 0) {
 128 +               usb_phy_enable(0);
 129 +               reset_control_assert(rstdev);
 130 +               reset_control_assert(rsthost);
 131 +       }
 132 +}
 133 +
 134 +static int usb_set_host(struct usb_otg *otg, struct usb_bus *host)
 135 +{
 136 +       otg->gadget = NULL;
 137 +       otg->host = host;
 138 +
 139 +       return 0;
 140 +}
 141 +
 142 +static int usb_set_peripheral(struct usb_otg *otg,
 143 +               struct usb_gadget *gadget)
 144 +{
 145 +       otg->host = NULL;
 146 +       otg->gadget = gadget;
 147 +
 148 +       return 0;
 149 +}
 150 +
 151 +static const struct of_device_id ralink_usbphy_dt_match[] = {
 152 +       { .compatible = "ralink,rt3xxx-usbphy", .data = (void *) (RT_CLKCFG1_UPHY1_CLK_EN | RT_CLKCFG1_UPHY0_CLK_EN) },
 153 +       { .compatible = "ralink,mt7620a-usbphy", .data = (void *) MT7620_CLKCFG1_UPHY0_CLK_EN },
 154 +       {},
 155 +};
 156 +MODULE_DEVICE_TABLE(of, ralink_usbphy_dt_match);
 157 +
 158 +static int usb_phy_probe(struct platform_device *pdev)
 159 +{
 160 +       const struct of_device_id *match;
 161 +       struct device *dev = &pdev->dev;
 162 +       struct usb_otg *otg;
 163 +       struct usb_phy *phy;
 164 +       int ret;
 165 +
 166 +       match = of_match_device(ralink_usbphy_dt_match, &pdev->dev);
 167 +       phy_clk = (int) match->data;
 168 +
 169 +       rsthost = devm_reset_control_get(&pdev->dev, "host");
 170 +       if (IS_ERR(rsthost))
 171 +               return PTR_ERR(rsthost);
 172 +
 173 +       rstdev = devm_reset_control_get(&pdev->dev, "device");
 174 +       if (IS_ERR(rstdev))
 175 +               return PTR_ERR(rstdev);
 176 +
 177 +       phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
 178 +       if (!phy) {
 179 +               dev_err(&pdev->dev, "unable to allocate memory for USB PHY\n");
 180 +               return -ENOMEM;
 181 +       }
 182 +
 183 +       otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
 184 +       if (!otg) {
 185 +               dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
 186 +               return -ENOMEM;
 187 +       }
 188 +
 189 +       phy->dev = dev;
 190 +       phy->label = dev_name(dev);
 191 +       phy->init = usb_power_on;
 192 +       phy->shutdown = usb_power_off;
 193 +       otg->set_host = usb_set_host;
 194 +       otg->set_peripheral = usb_set_peripheral;
 195 +       otg->phy = phy;
 196 +       phy->otg = otg;
 197 +       ret = usb_add_phy(phy, USB_PHY_TYPE_USB2);
 198 +
 199 +       if (ret < 0) {
 200 +               dev_err(dev, "usb phy addition error\n");
 201 +               return ret;
 202 +       }
 203 +
 204 +       platform_set_drvdata(pdev, phy);
 205 +
 206 +       dev_info(&pdev->dev, "loaded\n");
 207 +
 208 +       return ret;
 209 +}
 210 +
 211 +static int usb_phy_remove(struct platform_device *pdev)
 212 +{
 213 +       struct usb_phy *phy = platform_get_drvdata(pdev);
 214 +
 215 +       usb_remove_phy(phy);
 216 +
 217 +       return 0;
 218 +}
 219 +
 220 +static struct platform_driver usb_phy_driver = {
 221 +       .driver         = {
 222 +               .owner  = THIS_MODULE,
 223 +               .name   = "rt3xxx-usbphy",
 224 +               .of_match_table = of_match_ptr(ralink_usbphy_dt_match),
 225 +       },
 226 +       .probe          = usb_phy_probe,
 227 +       .remove         = usb_phy_remove,
 228 +};
 229 +
 230 +module_platform_driver(usb_phy_driver);
 231 +
 232 +MODULE_LICENSE("GPL v2");
 233 +MODULE_DESCRIPTION("Ralink USB phy");
 234 +MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");