target/linux/ipq806x/patches-4.19/0032-phy-add-qcom-dwc3-phy.patch

   1 From b9004f4fd23e4c614d71c972f3a9311665480e29 Mon Sep 17 00:00:00 2001
   2 From: Andy Gross <agross@codeaurora.org>
   3 Date: Thu, 9 Mar 2017 08:19:18 +0100
   4 Subject: [PATCH 32/69] phy: add qcom dwc3 phy
   5
   6 Signed-off-by: Andy Gross <agross@codeaurora.org>
   7 ---
   8
   9 --- a/drivers/phy/qualcomm/Kconfig
  10 +++ b/drivers/phy/qualcomm/Kconfig
  11 @@ -65,3 +65,15 @@ config PHY_QCOM_USB_HSIC
  12         select GENERIC_PHY
  13         help
  14           Support for the USB HSIC ULPI compliant PHY on QCOM chipsets.
  15 +
  16 +config PHY_QCOM_DWC3
  17 +       tristate "QCOM DWC3 USB PHY support"
  18 +       depends on ARCH_QCOM
  19 +       depends on HAS_IOMEM
  20 +       depends on OF
  21 +       select GENERIC_PHY
  22 +       help
  23 +         This option enables support for the Synopsis PHYs present inside the
  24 +         Qualcomm USB3.0 DWC3 controller.  This driver supports both HS and SS
  25 +         PHY controllers.
  26 +
  27 --- a/drivers/phy/qualcomm/Makefile
  28 +++ b/drivers/phy/qualcomm/Makefile
  29 @@ -9,3 +9,4 @@ obj-$(CONFIG_PHY_QCOM_UFS)              += phy-qcom-
  30  obj-$(CONFIG_PHY_QCOM_UFS)             += phy-qcom-ufs-qmp-20nm.o
  31  obj-$(CONFIG_PHY_QCOM_USB_HS)          += phy-qcom-usb-hs.o
  32  obj-$(CONFIG_PHY_QCOM_USB_HSIC)        += phy-qcom-usb-hsic.o
  33 +obj-$(CONFIG_PHY_QCOM_DWC3)            += phy-qcom-dwc3.o
  34 --- /dev/null
  35 +++ b/drivers/phy/qualcomm/phy-qcom-dwc3.c
  36 @@ -0,0 +1,578 @@
  37 +/* Copyright (c) 2014-2015, Code Aurora Forum. All rights reserved.
  38 + *
  39 + * This program is free software; you can redistribute it and/or modify
  40 + * it under the terms of the GNU General Public License version 2 and
  41 + * only version 2 as published by the Free Software Foundation.
  42 + *
  43 +* This program is distributed in the hope that it will be useful,
  44 +* but WITHOUT ANY WARRANTY; without even the implied warranty of
  45 +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  46 +* GNU General Public License for more details.
  47 +*/
  48 +
  49 +#include <linux/clk.h>
  50 +#include <linux/err.h>
  51 +#include <linux/io.h>
  52 +#include <linux/module.h>
  53 +#include <linux/of.h>
  54 +#include <linux/phy/phy.h>
  55 +#include <linux/platform_device.h>
  56 +#include <linux/delay.h>
  57 +#include <linux/regmap.h>
  58 +#include <linux/mfd/syscon.h>
  59 +
  60 +/**
  61 + *  USB QSCRATCH Hardware registers
  62 + */
  63 +#define QSCRATCH_GENERAL_CFG           (0x08)
  64 +#define HSUSB_PHY_CTRL_REG             (0x10)
  65 +
  66 +/* PHY_CTRL_REG */
  67 +#define HSUSB_CTRL_DMSEHV_CLAMP                        BIT(24)
  68 +#define HSUSB_CTRL_USB2_SUSPEND                        BIT(23)
  69 +#define HSUSB_CTRL_UTMI_CLK_EN                 BIT(21)
  70 +#define HSUSB_CTRL_UTMI_OTG_VBUS_VALID         BIT(20)
  71 +#define HSUSB_CTRL_USE_CLKCORE                 BIT(18)
  72 +#define HSUSB_CTRL_DPSEHV_CLAMP                        BIT(17)
  73 +#define HSUSB_CTRL_COMMONONN                   BIT(11)
  74 +#define HSUSB_CTRL_ID_HV_CLAMP                 BIT(9)
  75 +#define HSUSB_CTRL_OTGSESSVLD_CLAMP            BIT(8)
  76 +#define HSUSB_CTRL_CLAMP_EN                    BIT(7)
  77 +#define HSUSB_CTRL_RETENABLEN                  BIT(1)
  78 +#define HSUSB_CTRL_POR                         BIT(0)
  79 +
  80 +/* QSCRATCH_GENERAL_CFG */
  81 +#define HSUSB_GCFG_XHCI_REV            BIT(2)
  82 +
  83 +/**
  84 + *  USB QSCRATCH Hardware registers
  85 + */
  86 +#define SSUSB_PHY_CTRL_REG             (0x30)
  87 +#define SSUSB_PHY_PARAM_CTRL_1         (0x34)
  88 +#define SSUSB_PHY_PARAM_CTRL_2         (0x38)
  89 +#define CR_PROTOCOL_DATA_IN_REG        (0x3c)
  90 +#define CR_PROTOCOL_DATA_OUT_REG       (0x40)
  91 +#define CR_PROTOCOL_CAP_ADDR_REG       (0x44)
  92 +#define CR_PROTOCOL_CAP_DATA_REG       (0x48)
  93 +#define CR_PROTOCOL_READ_REG           (0x4c)
  94 +#define CR_PROTOCOL_WRITE_REG          (0x50)
  95 +
  96 +/* PHY_CTRL_REG */
  97 +#define SSUSB_CTRL_REF_USE_PAD         BIT(28)
  98 +#define SSUSB_CTRL_TEST_POWERDOWN      BIT(27)
  99 +#define SSUSB_CTRL_LANE0_PWR_PRESENT   BIT(24)
 100 +#define SSUSB_CTRL_SS_PHY_EN           BIT(8)
 101 +#define SSUSB_CTRL_SS_PHY_RESET                BIT(7)
 102 +
 103 +/* SSPHY control registers - Does this need 0x30? */
 104 +#define SSPHY_CTRL_RX_OVRD_IN_HI(lane) (0x1006 + 0x100 * lane)
 105 +#define SSPHY_CTRL_TX_OVRD_DRV_LO(lane)        (0x1002 + 0x100 * lane)
 106 +
 107 +/* SSPHY SoC version specific values */
 108 +#define SSPHY_RX_EQ_VALUE              4       /* Override value for rx_eq */
 109 +#define SSPHY_TX_DEEMPH_3_5DB          23      /* Override value for transmit
 110 +                                                  preemphasis */
 111 +#define SSPHY_MPLL_VALUE               0       /* Override value for mpll */
 112 +
 113 +/* QSCRATCH PHY_PARAM_CTRL1 fields */
 114 +#define PHY_PARAM_CTRL1_TX_FULL_SWING_MASK     0x07f00000u
 115 +#define PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK     0x000fc000u
 116 +#define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK   0x00003f00u
 117 +#define PHY_PARAM_CTRL1_LOS_BIAS_MASK          0x000000f8u
 118 +
 119 +#define PHY_PARAM_CTRL1_MASK                           \
 120 +               (PHY_PARAM_CTRL1_TX_FULL_SWING_MASK |   \
 121 +                PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK |   \
 122 +                PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK | \
 123 +                PHY_PARAM_CTRL1_LOS_BIAS_MASK)
 124 +
 125 +#define PHY_PARAM_CTRL1_TX_FULL_SWING(x)       \
 126 +               (((x) << 20) & PHY_PARAM_CTRL1_TX_FULL_SWING_MASK)
 127 +#define PHY_PARAM_CTRL1_TX_DEEMPH_6DB(x)       \
 128 +               (((x) << 14) & PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK)
 129 +#define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(x)     \
 130 +               (((x) <<  8) & PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK)
 131 +#define PHY_PARAM_CTRL1_LOS_BIAS(x)    \
 132 +               (((x) <<  3) & PHY_PARAM_CTRL1_LOS_BIAS_MASK)
 133 +
 134 +/* RX OVRD IN HI bits */
 135 +#define RX_OVRD_IN_HI_RX_RESET_OVRD            BIT(13)
 136 +#define RX_OVRD_IN_HI_RX_RX_RESET              BIT(12)
 137 +#define RX_OVRD_IN_HI_RX_EQ_OVRD               BIT(11)
 138 +#define RX_OVRD_IN_HI_RX_EQ_MASK               0x0700
 139 +#define RX_OVRD_IN_HI_RX_EQ_SHIFT              8
 140 +#define RX_OVRD_IN_HI_RX_EQ_EN_OVRD            BIT(7)
 141 +#define RX_OVRD_IN_HI_RX_EQ_EN                 BIT(6)
 142 +#define RX_OVRD_IN_HI_RX_LOS_FILTER_OVRD       BIT(5)
 143 +#define RX_OVRD_IN_HI_RX_LOS_FILTER_MASK       0x0018
 144 +#define RX_OVRD_IN_HI_RX_RATE_OVRD             BIT(2)
 145 +#define RX_OVRD_IN_HI_RX_RATE_MASK             0x0003
 146 +
 147 +/* TX OVRD DRV LO register bits */
 148 +#define TX_OVRD_DRV_LO_AMPLITUDE_MASK  0x007F
 149 +#define TX_OVRD_DRV_LO_PREEMPH_MASK    0x3F80
 150 +#define TX_OVRD_DRV_LO_PREEMPH_SHIFT   7
 151 +#define TX_OVRD_DRV_LO_EN              BIT(14)
 152 +
 153 +/* SS CAP register bits */
 154 +#define SS_CR_CAP_ADDR_REG             BIT(0)
 155 +#define SS_CR_CAP_DATA_REG             BIT(0)
 156 +#define SS_CR_READ_REG                 BIT(0)
 157 +#define SS_CR_WRITE_REG                        BIT(0)
 158 +
 159 +struct qcom_dwc3_usb_phy {
 160 +       struct regmap           *base;
 161 +       struct device           *dev;
 162 +       struct clk              *xo_clk;
 163 +       struct clk              *ref_clk;
 164 +       u32                     rx_eq;
 165 +       u32                     tx_deamp_3_5db;
 166 +       u32                     mpll;
 167 +};
 168 +
 169 +struct qcom_dwc3_phy_drvdata {
 170 +       struct phy_ops  ops;
 171 +       u32             clk_rate;
 172 +};
 173 +
 174 +/**
 175 + * Write register and read back masked value to confirm it is written
 176 + *
 177 + * @base - QCOM DWC3 PHY base virtual address.
 178 + * @offset - register offset.
 179 + * @mask - register bitmask specifying what should be updated
 180 + * @val - value to write.
 181 + */
 182 +static inline void qcom_dwc3_phy_write_readback(
 183 +       struct qcom_dwc3_usb_phy *phy_dwc3, u32 offset,
 184 +       const u32 mask, u32 val)
 185 +{
 186 +       u32 write_val, tmp;
 187 +
 188 +       tmp = regmap_read(phy_dwc3->base, offset, &tmp);
 189 +       tmp &= ~mask;           /* retain other bits */
 190 +       write_val = tmp | val;
 191 +
 192 +       regmap_write(phy_dwc3->base, offset, write_val);
 193 +
 194 +       /* Read back to see if val was written */
 195 +       regmap_read(phy_dwc3->base, offset, &tmp);
 196 +       tmp &= mask;            /* clear other bits */
 197 +
 198 +       if (tmp != val)
 199 +               dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n",
 200 +                       val, offset);
 201 +}
 202 +
 203 +static int wait_for_latch(struct regmap *base, u32 addr)
 204 +{
 205 +       u32 retry = 10, data;
 206 +
 207 +       while (true) {
 208 +               regmap_read(base, addr, &data);
 209 +               if (!data)
 210 +                       break;
 211 +
 212 +               if (--retry == 0)
 213 +                       return -ETIMEDOUT;
 214 +
 215 +               usleep_range(10, 20);
 216 +       }
 217 +
 218 +       return 0;
 219 +}
 220 +
 221 +/**
 222 + * Write SSPHY register
 223 + *
 224 + * @base - QCOM DWC3 PHY base virtual address.
 225 + * @addr - SSPHY address to write.
 226 + * @val - value to write.
 227 + */
 228 +static int qcom_dwc3_ss_write_phycreg(struct qcom_dwc3_usb_phy *phy_dwc3,
 229 +                                       u32 addr, u32 val)
 230 +{
 231 +       int ret;
 232 +
 233 +       regmap_write(phy_dwc3->base, CR_PROTOCOL_DATA_IN_REG, addr);
 234 +       regmap_write(phy_dwc3->base, CR_PROTOCOL_CAP_ADDR_REG, SS_CR_CAP_ADDR_REG);
 235 +
 236 +       ret = wait_for_latch(phy_dwc3->base, CR_PROTOCOL_CAP_ADDR_REG);
 237 +       if (ret)
 238 +               goto err_wait;
 239 +
 240 +       regmap_write(phy_dwc3->base, CR_PROTOCOL_DATA_IN_REG, val);
 241 +       regmap_write(phy_dwc3->base, CR_PROTOCOL_CAP_DATA_REG, SS_CR_CAP_DATA_REG);
 242 +
 243 +       ret = wait_for_latch(phy_dwc3->base, CR_PROTOCOL_CAP_DATA_REG);
 244 +       if (ret)
 245 +               goto err_wait;
 246 +
 247 +       regmap_write(phy_dwc3->base, CR_PROTOCOL_WRITE_REG, SS_CR_WRITE_REG);
 248 +
 249 +       ret = wait_for_latch(phy_dwc3->base, CR_PROTOCOL_WRITE_REG);
 250 +
 251 +err_wait:
 252 +       if (ret)
 253 +               dev_err(phy_dwc3->dev, "timeout waiting for latch\n");
 254 +       return ret;
 255 +}
 256 +
 257 +/**
 258 + * Read SSPHY register.
 259 + *
 260 + * @base - QCOM DWC3 PHY base virtual address.
 261 + * @addr - SSPHY address to read.
 262 + */
 263 +static int qcom_dwc3_ss_read_phycreg(struct regmap *base, u32 addr, u32 *val)
 264 +{
 265 +       int ret;
 266 +
 267 +       regmap_write(base, CR_PROTOCOL_DATA_IN_REG, addr);
 268 +       regmap_write(base, CR_PROTOCOL_CAP_ADDR_REG, SS_CR_CAP_ADDR_REG);
 269 +
 270 +       ret = wait_for_latch(base, CR_PROTOCOL_CAP_ADDR_REG);
 271 +       if (ret)
 272 +               goto err_wait;
 273 +
 274 +       /*
 275 +        * Due to hardware bug, first read of SSPHY register might be
 276 +        * incorrect. Hence as workaround, SW should perform SSPHY register
 277 +        * read twice, but use only second read and ignore first read.
 278 +        */
 279 +       regmap_write(base, CR_PROTOCOL_READ_REG, SS_CR_READ_REG);
 280 +
 281 +       ret = wait_for_latch(base, CR_PROTOCOL_READ_REG);
 282 +       if (ret)
 283 +               goto err_wait;
 284 +
 285 +       /* throwaway read */
 286 +       regmap_read(base, CR_PROTOCOL_DATA_OUT_REG, &ret);
 287 +
 288 +       regmap_write(base, CR_PROTOCOL_READ_REG, SS_CR_READ_REG);
 289 +
 290 +       ret = wait_for_latch(base, CR_PROTOCOL_READ_REG);
 291 +       if (ret)
 292 +               goto err_wait;
 293 +
 294 +       regmap_read(base, CR_PROTOCOL_DATA_OUT_REG, val);
 295 +
 296 +err_wait:
 297 +       return ret;
 298 +}
 299 +
 300 +static int qcom_dwc3_hs_phy_init(struct phy *phy)
 301 +{
 302 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 303 +       int ret;
 304 +       u32 val;
 305 +
 306 +       ret = clk_prepare_enable(phy_dwc3->xo_clk);
 307 +       if (ret)
 308 +               return ret;
 309 +
 310 +       ret = clk_prepare_enable(phy_dwc3->ref_clk);
 311 +       if (ret) {
 312 +               clk_disable_unprepare(phy_dwc3->xo_clk);
 313 +               return ret;
 314 +       }
 315 +
 316 +       /*
 317 +        * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel
 318 +        * enable clamping, and disable RETENTION (power-on default is ENABLED)
 319 +        */
 320 +       val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP |
 321 +               HSUSB_CTRL_RETENABLEN  | HSUSB_CTRL_COMMONONN |
 322 +               HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP |
 323 +               HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_UTMI_OTG_VBUS_VALID |
 324 +               HSUSB_CTRL_UTMI_CLK_EN | HSUSB_CTRL_CLAMP_EN | 0x70;
 325 +
 326 +       /* use core clock if external reference is not present */
 327 +       if (!phy_dwc3->xo_clk)
 328 +               val |= HSUSB_CTRL_USE_CLKCORE;
 329 +
 330 +       regmap_write(phy_dwc3->base, HSUSB_PHY_CTRL_REG, val);
 331 +       usleep_range(2000, 2200);
 332 +
 333 +       /* Disable (bypass) VBUS and ID filters */
 334 +       regmap_write(phy_dwc3->base, QSCRATCH_GENERAL_CFG, HSUSB_GCFG_XHCI_REV);
 335 +
 336 +       return 0;
 337 +}
 338 +
 339 +static int qcom_dwc3_hs_phy_exit(struct phy *phy)
 340 +{
 341 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 342 +
 343 +       clk_disable_unprepare(phy_dwc3->ref_clk);
 344 +       clk_disable_unprepare(phy_dwc3->xo_clk);
 345 +
 346 +       return 0;
 347 +}
 348 +
 349 +static int qcom_dwc3_ss_phy_init(struct phy *phy)
 350 +{
 351 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 352 +       int ret;
 353 +       u32 data = 0;
 354 +
 355 +       ret = clk_prepare_enable(phy_dwc3->xo_clk);
 356 +       if (ret)
 357 +               return ret;
 358 +
 359 +       ret = clk_prepare_enable(phy_dwc3->ref_clk);
 360 +       if (ret) {
 361 +               clk_disable_unprepare(phy_dwc3->xo_clk);
 362 +               return ret;
 363 +       }
 364 +
 365 +       /* reset phy */
 366 +       regmap_read(phy_dwc3->base, SSUSB_PHY_CTRL_REG, &data);
 367 +       regmap_write(phy_dwc3->base, SSUSB_PHY_CTRL_REG,
 368 +               data | SSUSB_CTRL_SS_PHY_RESET);
 369 +       usleep_range(2000, 2200);
 370 +       regmap_write(phy_dwc3->base, SSUSB_PHY_CTRL_REG, data);
 371 +
 372 +       /* clear REF_PAD if we don't have XO clk */
 373 +       if (!phy_dwc3->xo_clk)
 374 +               data &= ~SSUSB_CTRL_REF_USE_PAD;
 375 +       else
 376 +               data |= SSUSB_CTRL_REF_USE_PAD;
 377 +
 378 +       regmap_write(phy_dwc3->base, SSUSB_PHY_CTRL_REG, data);
 379 +
 380 +       /* wait for ref clk to become stable, this can take up to 30ms */
 381 +       msleep(30);
 382 +
 383 +       data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT;
 384 +       regmap_write(phy_dwc3->base, SSUSB_PHY_CTRL_REG, data);
 385 +
 386 +       /*
 387 +        * WORKAROUND: There is SSPHY suspend bug due to which USB enumerates
 388 +        * in HS mode instead of SS mode. Workaround it by asserting
 389 +        * LANE0.TX_ALT_BLOCK.EN_ALT_BUS to enable TX to use alt bus mode
 390 +        */
 391 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base, 0x102D, &data);
 392 +       if (ret)
 393 +               goto err_phy_trans;
 394 +
 395 +       data |= (1 << 7);
 396 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3, 0x102D, data);
 397 +       if (ret)
 398 +               goto err_phy_trans;
 399 +
 400 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base, 0x1010, &data);
 401 +       if (ret)
 402 +               goto err_phy_trans;
 403 +
 404 +       data &= ~0xff0;
 405 +       data |= 0x20;
 406 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3, 0x1010, data);
 407 +       if (ret)
 408 +               goto err_phy_trans;
 409 +
 410 +       /*
 411 +        * Fix RX Equalization setting as follows
 412 +        * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
 413 +        * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
 414 +        * LANE0.RX_OVRD_IN_HI.RX_EQ set based on SoC version
 415 +        * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
 416 +        */
 417 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
 418 +                       SSPHY_CTRL_RX_OVRD_IN_HI(0), &data);
 419 +       if (ret)
 420 +               goto err_phy_trans;
 421 +
 422 +       data &= ~RX_OVRD_IN_HI_RX_EQ_EN;
 423 +       data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD;
 424 +       data &= ~RX_OVRD_IN_HI_RX_EQ_MASK;
 425 +       data |= phy_dwc3->rx_eq << RX_OVRD_IN_HI_RX_EQ_SHIFT;
 426 +       data |= RX_OVRD_IN_HI_RX_EQ_OVRD;
 427 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3,
 428 +               SSPHY_CTRL_RX_OVRD_IN_HI(0), data);
 429 +       if (ret)
 430 +               goto err_phy_trans;
 431 +
 432 +       /*
 433 +        * Set EQ and TX launch amplitudes as follows
 434 +        * LANE0.TX_OVRD_DRV_LO.PREEMPH set based on SoC version
 435 +        * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 110
 436 +        * LANE0.TX_OVRD_DRV_LO.EN set to 1.
 437 +        */
 438 +       ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
 439 +               SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data);
 440 +       if (ret)
 441 +               goto err_phy_trans;
 442 +
 443 +       data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK;
 444 +       data |= phy_dwc3->tx_deamp_3_5db << TX_OVRD_DRV_LO_PREEMPH_SHIFT;
 445 +       data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK;
 446 +       data |= 0x6E;
 447 +       data |= TX_OVRD_DRV_LO_EN;
 448 +       ret = qcom_dwc3_ss_write_phycreg(phy_dwc3,
 449 +               SSPHY_CTRL_TX_OVRD_DRV_LO(0), data);
 450 +       if (ret)
 451 +               goto err_phy_trans;
 452 +
 453 +       qcom_dwc3_ss_write_phycreg(phy_dwc3, 0x30, phy_dwc3->mpll);
 454 +
 455 +       /*
 456 +        * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows
 457 +        * TX_FULL_SWING [26:20] amplitude to 110
 458 +        * TX_DEEMPH_6DB [19:14] to 32
 459 +        * TX_DEEMPH_3_5DB [13:8] set based on SoC version
 460 +        * LOS_BIAS [7:3] to 9
 461 +        */
 462 +       regmap_read(phy_dwc3->base, SSUSB_PHY_PARAM_CTRL_1, &data);
 463 +
 464 +       data &= ~PHY_PARAM_CTRL1_MASK;
 465 +
 466 +       data |= PHY_PARAM_CTRL1_TX_FULL_SWING(0x6e) |
 467 +               PHY_PARAM_CTRL1_TX_DEEMPH_6DB(0x20) |
 468 +               PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(phy_dwc3->tx_deamp_3_5db) |
 469 +               PHY_PARAM_CTRL1_LOS_BIAS(0x9);
 470 +
 471 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1,
 472 +                                    PHY_PARAM_CTRL1_MASK, data);
 473 +
 474 +err_phy_trans:
 475 +       return ret;
 476 +}
 477 +
 478 +static int qcom_dwc3_ss_phy_exit(struct phy *phy)
 479 +{
 480 +       struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
 481 +
 482 +       /* Sequence to put SSPHY in low power state:
 483 +        * 1. Clear REF_PHY_EN in PHY_CTRL_REG
 484 +        * 2. Clear REF_USE_PAD in PHY_CTRL_REG
 485 +        * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention
 486 +        */
 487 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 488 +               SSUSB_CTRL_SS_PHY_EN, 0x0);
 489 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 490 +               SSUSB_CTRL_REF_USE_PAD, 0x0);
 491 +       qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
 492 +               SSUSB_CTRL_TEST_POWERDOWN, 0x0);
 493 +
 494 +       clk_disable_unprepare(phy_dwc3->ref_clk);
 495 +       clk_disable_unprepare(phy_dwc3->xo_clk);
 496 +
 497 +       return 0;
 498 +}
 499 +
 500 +static const struct qcom_dwc3_phy_drvdata qcom_dwc3_hs_drvdata = {
 501 +       .ops = {
 502 +               .init           = qcom_dwc3_hs_phy_init,
 503 +               .exit           = qcom_dwc3_hs_phy_exit,
 504 +               .owner          = THIS_MODULE,
 505 +       },
 506 +       .clk_rate = 60000000,
 507 +};
 508 +
 509 +static const struct qcom_dwc3_phy_drvdata qcom_dwc3_ss_drvdata = {
 510 +       .ops = {
 511 +               .init           = qcom_dwc3_ss_phy_init,
 512 +               .exit           = qcom_dwc3_ss_phy_exit,
 513 +               .owner          = THIS_MODULE,
 514 +       },
 515 +       .clk_rate = 125000000,
 516 +};
 517 +
 518 +static const struct of_device_id qcom_dwc3_phy_table[] = {
 519 +       { .compatible = "qcom,dwc3-hs-usb-phy", .data = &qcom_dwc3_hs_drvdata },
 520 +       { .compatible = "qcom,dwc3-ss-usb-phy", .data = &qcom_dwc3_ss_drvdata },
 521 +       { /* Sentinel */ }
 522 +};
 523 +MODULE_DEVICE_TABLE(of, qcom_dwc3_phy_table);
 524 +
 525 +static int qcom_dwc3_phy_probe(struct platform_device *pdev)
 526 +{
 527 +       struct qcom_dwc3_usb_phy        *phy_dwc3;
 528 +       struct phy_provider             *phy_provider;
 529 +       struct phy                      *generic_phy;
 530 +       struct resource                 *res;
 531 +       const struct of_device_id *match;
 532 +       const struct qcom_dwc3_phy_drvdata *data;
 533 +       struct device_node *np;
 534 +
 535 +       phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL);
 536 +       if (!phy_dwc3)
 537 +               return -ENOMEM;
 538 +
 539 +       match = of_match_node(qcom_dwc3_phy_table, pdev->dev.of_node);
 540 +       data = match->data;
 541 +
 542 +       phy_dwc3->dev = &pdev->dev;
 543 +
 544 +       phy_dwc3->base = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap");
 545 +       if (IS_ERR_OR_NULL(phy_dwc3->base))
 546 +               return PTR_ERR_OR_ZERO(phy_dwc3->base) ? : -EINVAL;
 547 +
 548 +       phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref");
 549 +       if (IS_ERR(phy_dwc3->ref_clk)) {
 550 +               dev_dbg(phy_dwc3->dev, "cannot get reference clock\n");
 551 +               return PTR_ERR(phy_dwc3->ref_clk);
 552 +       }
 553 +
 554 +       clk_set_rate(phy_dwc3->ref_clk, data->clk_rate);
 555 +
 556 +       phy_dwc3->xo_clk = devm_clk_get(phy_dwc3->dev, "xo");
 557 +       if (IS_ERR(phy_dwc3->xo_clk)) {
 558 +               dev_dbg(phy_dwc3->dev, "cannot get TCXO clock\n");
 559 +               phy_dwc3->xo_clk = NULL;
 560 +       }
 561 +
 562 +       /* Parse device node to probe HSIO settings */
 563 +       np = of_node_get(pdev->dev.of_node);
 564 +       if (!of_compat_cmp(match->compatible, "qcom,dwc3-ss-usb-phy",
 565 +                          strlen(match->compatible))) {
 566 +
 567 +               if (of_property_read_u32(np, "rx_eq", &phy_dwc3->rx_eq) ||
 568 +                   of_property_read_u32(np, "tx_deamp_3_5db",
 569 +                                        &phy_dwc3->tx_deamp_3_5db) ||
 570 +                   of_property_read_u32(np, "mpll", &phy_dwc3->mpll)) {
 571 +
 572 +                       dev_err(phy_dwc3->dev, "cannot get HSIO settings from device node, using default values\n");
 573 +
 574 +                       /* Default HSIO settings */
 575 +                       phy_dwc3->rx_eq = SSPHY_RX_EQ_VALUE;
 576 +                       phy_dwc3->tx_deamp_3_5db = SSPHY_TX_DEEMPH_3_5DB;
 577 +                       phy_dwc3->mpll = SSPHY_MPLL_VALUE;
 578 +               }
 579 +       }
 580 +
 581 +       generic_phy = devm_phy_create(phy_dwc3->dev, pdev->dev.of_node,
 582 +                                     &data->ops);
 583 +
 584 +       if (IS_ERR(generic_phy))
 585 +               return PTR_ERR(generic_phy);
 586 +
 587 +       phy_set_drvdata(generic_phy, phy_dwc3);
 588 +       platform_set_drvdata(pdev, phy_dwc3);
 589 +
 590 +       phy_provider = devm_of_phy_provider_register(phy_dwc3->dev,
 591 +                       of_phy_simple_xlate);
 592 +
 593 +       if (IS_ERR(phy_provider))
 594 +               return PTR_ERR(phy_provider);
 595 +
 596 +       return 0;
 597 +}
 598 +
 599 +static struct platform_driver qcom_dwc3_phy_driver = {
 600 +       .probe          = qcom_dwc3_phy_probe,
 601 +       .driver         = {
 602 +               .name   = "qcom-dwc3-usb-phy",
 603 +               .owner  = THIS_MODULE,
 604 +               .of_match_table = qcom_dwc3_phy_table,
 605 +       },
 606 +};
 607 +
 608 +module_platform_driver(qcom_dwc3_phy_driver);
 609 +
 610 +MODULE_ALIAS("platform:phy-qcom-dwc3");
 611 +MODULE_LICENSE("GPL v2");
 612 +MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
 613 +MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
 614 +MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver");