target/linux/ipq40xx/patches-4.14/076-phy-qcom-ipq4019-usb-add-driver-for-QCOM-IPQ4019.patch

   1 From 633f0e08498aebfdb932bd71319b4cb136709499 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <john@phrozen.org>
   3 Date: Tue, 24 Jul 2018 14:45:49 +0200
   4 Subject: [PATCH 2/3] phy: qcom-ipq4019-usb: add driver for QCOM/IPQ4019
   5
   6 Add a driver to setup the USB phy on Qualcom Dakota SoCs.
   7 The driver sets up HS and SS phys. In case of HS some magic values need to
   8 be written to magic offsets. These were taken from the SDK driver.
   9
  10 Signed-off-by: John Crispin <john@phrozen.org>
  11 ---
  12  drivers/phy/qualcomm/Kconfig                |   7 ++
  13  drivers/phy/qualcomm/Makefile               |   1 +
  14  drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c | 188 ++++++++++++++++++++++++++++
  15  3 files changed, 196 insertions(+)
  16  create mode 100644 drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c
  17
  18 --- a/drivers/phy/qualcomm/Kconfig
  19 +++ b/drivers/phy/qualcomm/Kconfig
  20 @@ -8,6 +8,13 @@ config PHY_QCOM_APQ8064_SATA
  21         depends on OF
  22         select GENERIC_PHY
  23
  24 +config PHY_QCOM_IPQ4019_USB
  25 +       tristate "Qualcomm IPQ4019 USB PHY module"
  26 +       depends on OF && ARCH_QCOM
  27 +       select GENERIC_PHY
  28 +       help
  29 +         Support for the USB PHY on QCOM IPQ4019/Dakota chipsets.
  30 +
  31  config PHY_QCOM_IPQ806X_SATA
  32         tristate "Qualcomm IPQ806x SATA SerDes/PHY driver"
  33         depends on ARCH_QCOM
  34 --- /dev/null
  35 +++ b/drivers/phy/qualcomm/phy-qcom-ipq4019-usb.c
  36 @@ -0,0 +1,188 @@
  37 +/*
  38 + * Copyright (C) 2018 John Crispin <john@phrozen.org>
  39 + *
  40 + * Based on code from
  41 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
  42 + *
  43 + * This program is free software; you can redistribute it and/or modify
  44 + * it under the terms of the GNU General Public License as published by
  45 + * the Free Software Foundation; either version 2 of the License, or
  46 + * (at your option) any later version.
  47 + *
  48 + * This program is distributed in the hope that it will be useful,
  49 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  50 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  51 + * GNU General Public License for more details.
  52 + */
  53 +
  54 +#include <linux/delay.h>
  55 +#include <linux/err.h>
  56 +#include <linux/io.h>
  57 +#include <linux/kernel.h>
  58 +#include <linux/module.h>
  59 +#include <linux/mutex.h>
  60 +#include <linux/of_platform.h>
  61 +#include <linux/phy/phy.h>
  62 +#include <linux/platform_device.h>
  63 +#include <linux/reset.h>
  64 +
  65 +/*
  66 + * Magic registers copied from the SDK driver code
  67 + */
  68 +#define PHY_CTRL0_ADDR 0x000
  69 +#define PHY_CTRL1_ADDR 0x004
  70 +#define PHY_CTRL2_ADDR 0x008
  71 +#define PHY_CTRL3_ADDR 0x00C
  72 +#define PHY_CTRL4_ADDR 0x010
  73 +#define PHY_MISC_ADDR  0x024
  74 +#define PHY_IPG_ADDR   0x030
  75 +
  76 +#define PHY_CTRL0_VAL  0xA4600015
  77 +#define PHY_CTRL1_VAL  0x09500000
  78 +#define PHY_CTRL2_VAL  0x00058180
  79 +#define PHY_CTRL3_VAL  0x6DB6DCD6
  80 +#define PHY_CTRL4_VAL  0x836DB6DB
  81 +#define PHY_MISC_VAL   0x3803FB0C
  82 +#define PHY_IPG_VAL    0x47323232
  83 +
  84 +struct ipq4019_usb_phy {
  85 +       struct device           *dev;
  86 +       struct phy              *phy;
  87 +       void __iomem            *base;
  88 +       struct reset_control    *por_rst;
  89 +       struct reset_control    *srif_rst;
  90 +};
  91 +
  92 +static int ipq4019_ss_phy_power_off(struct phy *_phy)
  93 +{
  94 +       struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
  95 +
  96 +       reset_control_assert(phy->por_rst);
  97 +       msleep(10);
  98 +
  99 +       return 0;
 100 +}
 101 +
 102 +static int ipq4019_ss_phy_power_on(struct phy *_phy)
 103 +{
 104 +       struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
 105 +
 106 +       ipq4019_ss_phy_power_off(_phy);
 107 +
 108 +       reset_control_deassert(phy->por_rst);
 109 +
 110 +       return 0;
 111 +}
 112 +
 113 +static struct phy_ops ipq4019_usb_ss_phy_ops = {
 114 +       .power_on       = ipq4019_ss_phy_power_on,
 115 +       .power_off      = ipq4019_ss_phy_power_off,
 116 +};
 117 +
 118 +static int ipq4019_hs_phy_power_off(struct phy *_phy)
 119 +{
 120 +       struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
 121 +
 122 +       reset_control_assert(phy->por_rst);
 123 +       msleep(10);
 124 +
 125 +       reset_control_assert(phy->srif_rst);
 126 +       msleep(10);
 127 +
 128 +       return 0;
 129 +}
 130 +
 131 +static int ipq4019_hs_phy_power_on(struct phy *_phy)
 132 +{
 133 +       struct ipq4019_usb_phy *phy = phy_get_drvdata(_phy);
 134 +
 135 +       ipq4019_hs_phy_power_off(_phy);
 136 +
 137 +       reset_control_deassert(phy->srif_rst);
 138 +       msleep(10);
 139 +
 140 +       writel(PHY_CTRL0_VAL, phy->base + PHY_CTRL0_ADDR);
 141 +       writel(PHY_CTRL1_VAL, phy->base + PHY_CTRL1_ADDR);
 142 +       writel(PHY_CTRL2_VAL, phy->base + PHY_CTRL2_ADDR);
 143 +       writel(PHY_CTRL3_VAL, phy->base + PHY_CTRL3_ADDR);
 144 +       writel(PHY_CTRL4_VAL, phy->base + PHY_CTRL4_ADDR);
 145 +       writel(PHY_MISC_VAL, phy->base + PHY_MISC_ADDR);
 146 +       writel(PHY_IPG_VAL, phy->base + PHY_IPG_ADDR);
 147 +       msleep(10);
 148 +
 149 +       reset_control_deassert(phy->por_rst);
 150 +
 151 +       return 0;
 152 +}
 153 +
 154 +static struct phy_ops ipq4019_usb_hs_phy_ops = {
 155 +       .power_on       = ipq4019_hs_phy_power_on,
 156 +       .power_off      = ipq4019_hs_phy_power_off,
 157 +};
 158 +
 159 +static const struct of_device_id ipq4019_usb_phy_of_match[] = {
 160 +       { .compatible = "qcom,usb-hs-ipq4019-phy", .data = &ipq4019_usb_hs_phy_ops},
 161 +       { .compatible = "qcom,usb-ss-ipq4019-phy", .data = &ipq4019_usb_ss_phy_ops},
 162 +       { },
 163 +};
 164 +MODULE_DEVICE_TABLE(of, ipq4019_usb_phy_of_match);
 165 +
 166 +static int ipq4019_usb_phy_probe(struct platform_device *pdev)
 167 +{
 168 +       struct device *dev = &pdev->dev;
 169 +       struct resource *res;
 170 +       struct phy_provider *phy_provider;
 171 +       struct ipq4019_usb_phy *phy;
 172 +       const struct of_device_id *match;
 173 +
 174 +       match = of_match_device(ipq4019_usb_phy_of_match, &pdev->dev);
 175 +       if (!match)
 176 +               return -ENODEV;
 177 +
 178 +       phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
 179 +       if (!phy)
 180 +               return -ENOMEM;
 181 +
 182 +       phy->dev = &pdev->dev;
 183 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 184 +       phy->base = devm_ioremap_resource(&pdev->dev, res);
 185 +       if (IS_ERR(phy->base)) {
 186 +               dev_err(dev, "failed to remap register memory\n");
 187 +               return PTR_ERR(phy->base);
 188 +       }
 189 +
 190 +       phy->por_rst = devm_reset_control_get(phy->dev, "por_rst");
 191 +       if (IS_ERR(phy->por_rst)) {
 192 +               if (PTR_ERR(phy->por_rst) != -EPROBE_DEFER)
 193 +                       dev_err(dev, "POR reset is missing\n");
 194 +               return PTR_ERR(phy->por_rst);
 195 +       }
 196 +
 197 +       phy->srif_rst = devm_reset_control_get_optional(phy->dev, "srif_rst");
 198 +       if (IS_ERR(phy->srif_rst))
 199 +               return PTR_ERR(phy->srif_rst);
 200 +
 201 +       phy->phy = devm_phy_create(dev, NULL, match->data);
 202 +       if (IS_ERR(phy->phy)) {
 203 +               dev_err(dev, "failed to create PHY\n");
 204 +               return PTR_ERR(phy->phy);
 205 +       }
 206 +       phy_set_drvdata(phy->phy, phy);
 207 +
 208 +       phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 209 +
 210 +       return PTR_ERR_OR_ZERO(phy_provider);
 211 +}
 212 +
 213 +static struct platform_driver ipq4019_usb_phy_driver = {
 214 +       .probe  = ipq4019_usb_phy_probe,
 215 +       .driver = {
 216 +               .of_match_table = ipq4019_usb_phy_of_match,
 217 +               .name  = "ipq4019-usb-phy",
 218 +       }
 219 +};
 220 +module_platform_driver(ipq4019_usb_phy_driver);
 221 +
 222 +MODULE_DESCRIPTION("QCOM/IPQ4019 USB phy driver");
 223 +MODULE_AUTHOR("John Crispin <john@phrozen.org>");
 224 +MODULE_LICENSE("GPL v2");
 225 --- a/drivers/phy/qualcomm/Makefile
 226 +++ b/drivers/phy/qualcomm/Makefile
 227 @@ -1,5 +1,6 @@
 228  # SPDX-License-Identifier: GPL-2.0
 229  obj-$(CONFIG_PHY_QCOM_APQ8064_SATA)    += phy-qcom-apq8064-sata.o
 230 +obj-$(CONFIG_PHY_QCOM_IPQ4019_USB)     += phy-qcom-ipq4019-usb.o
 231  obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA)    += phy-qcom-ipq806x-sata.o
 232  obj-$(CONFIG_PHY_QCOM_QMP)             += phy-qcom-qmp.o
 233  obj-$(CONFIG_PHY_QCOM_QUSB2)           += phy-qcom-qusb2.o