target/linux/ath79/patches-4.19/0004-phy-add-ath79-usb-phys.patch

   1 From 08c9d6ceef01893678a5d2e8a15517c745417f21 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <john@phrozen.org>
   3 Date: Tue, 6 Mar 2018 10:04:05 +0100
   4 Subject: [PATCH 04/27] phy: add ath79 usb phys
   5
   6 Signed-off-by: John Crispin <john@phrozen.org>
   7 ---
   8  drivers/phy/Kconfig          |  16 ++++++
   9  drivers/phy/Makefile         |   2 +
  10  drivers/phy/phy-ar7100-usb.c | 124 +++++++++++++++++++++++++++++++++++++++++++
  11  drivers/phy/phy-ar7200-usb.c | 108 +++++++++++++++++++++++++++++++++++++
  12  4 files changed, 250 insertions(+)
  13  create mode 100644 drivers/phy/phy-ar7100-usb.c
  14  create mode 100644 drivers/phy/phy-ar7200-usb.c
  15
  16 --- a/drivers/phy/Kconfig
  17 +++ b/drivers/phy/Kconfig
  18 @@ -15,6 +15,22 @@ config GENERIC_PHY
  19           phy users can obtain reference to the PHY. All the users of this
  20           framework should select this config.
  21
  22 +config PHY_AR7100_USB
  23 +       tristate "Atheros AR7100 USB PHY driver"
  24 +       depends on ATH79 || COMPILE_TEST
  25 +       default y if USB_EHCI_HCD_PLATFORM
  26 +       select PHY_SIMPLE
  27 +       help
  28 +         Enable this to support the USB PHY on Atheros AR7100 SoCs.
  29 +
  30 +config PHY_AR7200_USB
  31 +       tristate "Atheros AR7200 USB PHY driver"
  32 +       depends on ATH79 || COMPILE_TEST
  33 +       default y if USB_EHCI_HCD_PLATFORM
  34 +       select PHY_SIMPLE
  35 +       help
  36 +         Enable this to support the USB PHY on Atheros AR7200 SoCs.
  37 +
  38  config PHY_LPC18XX_USB_OTG
  39         tristate "NXP LPC18xx/43xx SoC USB OTG PHY driver"
  40         depends on OF && (ARCH_LPC18XX || COMPILE_TEST)
  41 --- a/drivers/phy/Makefile
  42 +++ b/drivers/phy/Makefile
  43 @@ -4,6 +4,8 @@
  44  #
  45
  46  obj-$(CONFIG_GENERIC_PHY)              += phy-core.o
  47 +obj-$(CONFIG_PHY_AR7100_USB)           += phy-ar7100-usb.o
  48 +obj-$(CONFIG_PHY_AR7200_USB)           += phy-ar7200-usb.o
  49  obj-$(CONFIG_PHY_LPC18XX_USB_OTG)      += phy-lpc18xx-usb-otg.o
  50  obj-$(CONFIG_PHY_XGENE)                        += phy-xgene.o
  51  obj-$(CONFIG_PHY_PISTACHIO_USB)                += phy-pistachio-usb.o
  52 --- /dev/null
  53 +++ b/drivers/phy/phy-ar7100-usb.c
  54 @@ -0,0 +1,140 @@
  55 +/*
  56 + * Copyright (C) 2018 John Crispin <john@phrozen.org>
  57 + *
  58 + * This program is free software; you can redistribute it and/or modify
  59 + * it under the terms of the GNU General Public License as published by
  60 + * the Free Software Foundation; either version 2 of the License, or
  61 + * (at your option) any later version.
  62 + */
  63 +
  64 +#include <linux/module.h>
  65 +#include <linux/platform_device.h>
  66 +#include <linux/phy/phy.h>
  67 +#include <linux/delay.h>
  68 +#include <linux/reset.h>
  69 +#include <linux/of_gpio.h>
  70 +
  71 +#include <asm/mach-ath79/ath79.h>
  72 +#include <asm/mach-ath79/ar71xx_regs.h>
  73 +
  74 +struct ar7100_usb_phy {
  75 +       struct reset_control    *rst_phy;
  76 +       struct reset_control    *rst_host;
  77 +       struct reset_control    *rst_ohci_dll;
  78 +       void __iomem            *io_base;
  79 +       struct phy              *phy;
  80 +       int                     gpio;
  81 +};
  82 +
  83 +static int ar7100_usb_phy_power_off(struct phy *phy)
  84 +{
  85 +       struct ar7100_usb_phy *priv = phy_get_drvdata(phy);
  86 +       int err = 0;
  87 +
  88 +       err |= reset_control_assert(priv->rst_host);
  89 +       err |= reset_control_assert(priv->rst_phy);
  90 +       err |= reset_control_assert(priv->rst_ohci_dll);
  91 +
  92 +       return err;
  93 +}
  94 +
  95 +static int ar7100_usb_phy_power_on(struct phy *phy)
  96 +{
  97 +       struct ar7100_usb_phy *priv = phy_get_drvdata(phy);
  98 +       int err = 0;
  99 +
 100 +       err |= ar7100_usb_phy_power_off(phy);
 101 +       mdelay(100);
 102 +       err |= reset_control_deassert(priv->rst_ohci_dll);
 103 +       err |= reset_control_deassert(priv->rst_phy);
 104 +       err |= reset_control_deassert(priv->rst_host);
 105 +       mdelay(500);
 106 +       iowrite32(0xf0000, priv->io_base + AR71XX_USB_CTRL_REG_CONFIG);
 107 +       iowrite32(0x20c00, priv->io_base + AR71XX_USB_CTRL_REG_FLADJ);
 108 +
 109 +       return err;
 110 +}
 111 +
 112 +static const struct phy_ops ar7100_usb_phy_ops = {
 113 +       .power_on       = ar7100_usb_phy_power_on,
 114 +       .power_off      = ar7100_usb_phy_power_off,
 115 +       .owner          = THIS_MODULE,
 116 +};
 117 +
 118 +static int ar7100_usb_phy_probe(struct platform_device *pdev)
 119 +{
 120 +       struct phy_provider *phy_provider;
 121 +       struct resource *res;
 122 +       struct ar7100_usb_phy *priv;
 123 +
 124 +       priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 125 +       if (!priv)
 126 +               return -ENOMEM;
 127 +
 128 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 129 +       priv->io_base = devm_ioremap_resource(&pdev->dev, res);
 130 +       if (IS_ERR(priv->io_base))
 131 +               return PTR_ERR(priv->io_base);
 132 +
 133 +       priv->rst_phy = devm_reset_control_get(&pdev->dev, "usb-phy");
 134 +       if (IS_ERR(priv->rst_phy)) {
 135 +               dev_err(&pdev->dev, "phy reset is missing\n");
 136 +               return PTR_ERR(priv->rst_phy);
 137 +       }
 138 +
 139 +       priv->rst_host = devm_reset_control_get(&pdev->dev, "usb-host");
 140 +       if (IS_ERR(priv->rst_host)) {
 141 +               dev_err(&pdev->dev, "host reset is missing\n");
 142 +               return PTR_ERR(priv->rst_host);
 143 +       }
 144 +
 145 +       priv->rst_ohci_dll = devm_reset_control_get(&pdev->dev, "usb-ohci-dll");
 146 +       if (IS_ERR(priv->rst_ohci_dll)) {
 147 +               dev_err(&pdev->dev, "ohci-dll reset is missing\n");
 148 +               return PTR_ERR(priv->rst_host);
 149 +       }
 150 +
 151 +       priv->phy = devm_phy_create(&pdev->dev, NULL, &ar7100_usb_phy_ops);
 152 +       if (IS_ERR(priv->phy)) {
 153 +               dev_err(&pdev->dev, "failed to create PHY\n");
 154 +               return PTR_ERR(priv->phy);
 155 +       }
 156 +
 157 +       priv->gpio = of_get_gpio(pdev->dev.of_node, 0);
 158 +       if (priv->gpio >= 0) {
 159 +               int ret = devm_gpio_request(&pdev->dev, priv->gpio, dev_name(&pdev->dev));
 160 +
 161 +               if (ret) {
 162 +                       dev_err(&pdev->dev, "failed to request gpio\n");
 163 +                       return ret;
 164 +               }
 165 +               gpio_export_with_name(priv->gpio, 0, dev_name(&pdev->dev));
 166 +               gpio_set_value(priv->gpio, 1);
 167 +       }
 168 +
 169 +       phy_set_drvdata(priv->phy, priv);
 170 +
 171 +       phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
 172 +
 173 +
 174 +       return PTR_ERR_OR_ZERO(phy_provider);
 175 +}
 176 +
 177 +static const struct of_device_id ar7100_usb_phy_of_match[] = {
 178 +       { .compatible = "qca,ar7100-usb-phy" },
 179 +       {}
 180 +};
 181 +MODULE_DEVICE_TABLE(of, ar7100_usb_phy_of_match);
 182 +
 183 +static struct platform_driver ar7100_usb_phy_driver = {
 184 +       .probe  = ar7100_usb_phy_probe,
 185 +       .driver = {
 186 +               .of_match_table = ar7100_usb_phy_of_match,
 187 +               .name           = "ar7100-usb-phy",
 188 +       }
 189 +};
 190 +module_platform_driver(ar7100_usb_phy_driver);
 191 +
 192 +MODULE_DESCRIPTION("ATH79 USB PHY driver");
 193 +MODULE_AUTHOR("Alban Bedel <albeu@free.fr>");
 194 +MODULE_LICENSE("GPL");
 195 --- /dev/null
 196 +++ b/drivers/phy/phy-ar7200-usb.c
 197 @@ -0,0 +1,123 @@
 198 +/*
 199 + * Copyright (C) 2015 Alban Bedel <albeu@free.fr>
 200 + *
 201 + * This program is free software; you can redistribute it and/or modify
 202 + * it under the terms of the GNU General Public License as published by
 203 + * the Free Software Foundation; either version 2 of the License, or
 204 + * (at your option) any later version.
 205 + */
 206 +
 207 +#include <linux/module.h>
 208 +#include <linux/platform_device.h>
 209 +#include <linux/phy/phy.h>
 210 +#include <linux/reset.h>
 211 +#include <linux/of_gpio.h>
 212 +
 213 +struct ar7200_usb_phy {
 214 +       struct reset_control    *rst_phy;
 215 +       struct reset_control    *suspend_override;
 216 +       struct phy              *phy;
 217 +       int                     gpio;
 218 +};
 219 +
 220 +static int ar7200_usb_phy_power_on(struct phy *phy)
 221 +{
 222 +       struct ar7200_usb_phy *priv = phy_get_drvdata(phy);
 223 +       int err = 0;
 224 +
 225 +       if (priv->rst_phy)
 226 +               err = reset_control_deassert(priv->rst_phy);
 227 +       if (!err && priv->suspend_override)
 228 +               err = reset_control_assert(priv->suspend_override);
 229 +       if (err && priv->rst_phy)
 230 +               err = reset_control_assert(priv->rst_phy);
 231 +
 232 +       return err;
 233 +}
 234 +
 235 +static int ar7200_usb_phy_power_off(struct phy *phy)
 236 +{
 237 +       struct ar7200_usb_phy *priv = phy_get_drvdata(phy);
 238 +       int err = 0;
 239 +
 240 +       if (priv->suspend_override)
 241 +               err = reset_control_deassert(priv->suspend_override);
 242 +       if (priv->rst_phy)
 243 +               err |= reset_control_assert(priv->rst_phy);
 244 +
 245 +       return err;
 246 +}
 247 +
 248 +static const struct phy_ops ar7200_usb_phy_ops = {
 249 +       .power_on       = ar7200_usb_phy_power_on,
 250 +       .power_off      = ar7200_usb_phy_power_off,
 251 +       .owner          = THIS_MODULE,
 252 +};
 253 +
 254 +static int ar7200_usb_phy_probe(struct platform_device *pdev)
 255 +{
 256 +       struct phy_provider *phy_provider;
 257 +       struct ar7200_usb_phy *priv;
 258 +
 259 +       priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 260 +       if (!priv)
 261 +               return -ENOMEM;
 262 +
 263 +       priv->rst_phy = devm_reset_control_get(&pdev->dev, "usb-phy");
 264 +       if (IS_ERR(priv->rst_phy)) {
 265 +               dev_err(&pdev->dev, "phy reset is missing\n");
 266 +               return PTR_ERR(priv->rst_phy);
 267 +       }
 268 +
 269 +       priv->suspend_override = devm_reset_control_get_optional(
 270 +               &pdev->dev, "usb-suspend-override");
 271 +       if (IS_ERR(priv->suspend_override)) {
 272 +               if (PTR_ERR(priv->suspend_override) == -ENOENT)
 273 +                       priv->suspend_override = NULL;
 274 +               else
 275 +                       return PTR_ERR(priv->suspend_override);
 276 +       }
 277 +
 278 +       priv->phy = devm_phy_create(&pdev->dev, NULL, &ar7200_usb_phy_ops);
 279 +       if (IS_ERR(priv->phy)) {
 280 +               dev_err(&pdev->dev, "failed to create PHY\n");
 281 +               return PTR_ERR(priv->phy);
 282 +       }
 283 +
 284 +       priv->gpio = of_get_gpio(pdev->dev.of_node, 0);
 285 +       if (priv->gpio >= 0) {
 286 +               int ret = devm_gpio_request(&pdev->dev, priv->gpio, dev_name(&pdev->dev));
 287 +
 288 +               if (ret) {
 289 +                       dev_err(&pdev->dev, "failed to request gpio\n");
 290 +                       return ret;
 291 +               }
 292 +               gpio_export_with_name(priv->gpio, 0, dev_name(&pdev->dev));
 293 +               gpio_set_value(priv->gpio, 1);
 294 +       }
 295 +
 296 +       phy_set_drvdata(priv->phy, priv);
 297 +
 298 +       phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
 299 +
 300 +       return PTR_ERR_OR_ZERO(phy_provider);
 301 +}
 302 +
 303 +static const struct of_device_id ar7200_usb_phy_of_match[] = {
 304 +       { .compatible = "qca,ar7200-usb-phy" },
 305 +       {}
 306 +};
 307 +MODULE_DEVICE_TABLE(of, ar7200_usb_phy_of_match);
 308 +
 309 +static struct platform_driver ar7200_usb_phy_driver = {
 310 +       .probe  = ar7200_usb_phy_probe,
 311 +       .driver = {
 312 +               .of_match_table = ar7200_usb_phy_of_match,
 313 +               .name           = "ar7200-usb-phy",
 314 +       }
 315 +};
 316 +module_platform_driver(ar7200_usb_phy_driver);
 317 +
 318 +MODULE_DESCRIPTION("ATH79 USB PHY driver");
 319 +MODULE_AUTHOR("Alban Bedel <albeu@free.fr>");
 320 +MODULE_LICENSE("GPL");