drivers/usb/phy/phy-tegra-usb.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2010 Google, Inc.
   4  * Copyright (C) 2013 NVIDIA Corporation
   5  *
   6  * Author:
   7  *      Erik Gilling <konkers@google.com>
   8  *      Benoit Goby <benoit@android.com>
   9  *      Venu Byravarasu <vbyravarasu@nvidia.com>
  10  */
  11
  12 #include <linux/delay.h>
  13 #include <linux/err.h>
  14 #include <linux/export.h>
  15 #include <linux/gpio/consumer.h>
  16 #include <linux/iopoll.h>
  17 #include <linux/module.h>
  18 #include <linux/of.h>
  19 #include <linux/of_device.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/resource.h>
  22 #include <linux/slab.h>
  23 #include <linux/spinlock.h>
  24
  25 #include <linux/regulator/consumer.h>
  26
  27 #include <linux/usb/ehci_def.h>
  28 #include <linux/usb/of.h>
  29 #include <linux/usb/tegra_usb_phy.h>
  30 #include <linux/usb/ulpi.h>
  31
  32 #define ULPI_VIEWPORT                           0x170
  33
  34 /* PORTSC PTS/PHCD bits, Tegra20 only */
  35 #define TEGRA_USB_PORTSC1                       0x184
  36 #define TEGRA_USB_PORTSC1_PTS(x)                (((x) & 0x3) << 30)
  37 #define TEGRA_USB_PORTSC1_PHCD                  BIT(23)
  38
  39 /* HOSTPC1 PTS/PHCD bits, Tegra30 and above */
  40 #define TEGRA_USB_HOSTPC1_DEVLC                 0x1b4
  41 #define TEGRA_USB_HOSTPC1_DEVLC_PTS(x)          (((x) & 0x7) << 29)
  42 #define TEGRA_USB_HOSTPC1_DEVLC_PHCD            BIT(22)
  43
  44 /* Bits of PORTSC1, which will get cleared by writing 1 into them */
  45 #define TEGRA_PORTSC1_RWC_BITS  (PORT_CSC | PORT_PEC | PORT_OCC)
  46
  47 #define USB_SUSP_CTRL                           0x400
  48 #define   USB_WAKE_ON_RESUME_EN                 BIT(2)
  49 #define   USB_WAKE_ON_CNNT_EN_DEV               BIT(3)
  50 #define   USB_WAKE_ON_DISCON_EN_DEV             BIT(4)
  51 #define   USB_SUSP_CLR                          BIT(5)
  52 #define   USB_PHY_CLK_VALID                     BIT(7)
  53 #define   UTMIP_RESET                           BIT(11)
  54 #define   UHSIC_RESET                           BIT(11)
  55 #define   UTMIP_PHY_ENABLE                      BIT(12)
  56 #define   ULPI_PHY_ENABLE                       BIT(13)
  57 #define   USB_SUSP_SET                          BIT(14)
  58 #define   USB_WAKEUP_DEBOUNCE_COUNT(x)          (((x) & 0x7) << 16)
  59
  60 #define USB_PHY_VBUS_SENSORS                    0x404
  61 #define   B_SESS_VLD_WAKEUP_EN                  BIT(14)
  62 #define   A_SESS_VLD_WAKEUP_EN                  BIT(22)
  63 #define   A_VBUS_VLD_WAKEUP_EN                  BIT(30)
  64
  65 #define USB_PHY_VBUS_WAKEUP_ID                  0x408
  66 #define   ID_INT_EN                             BIT(0)
  67 #define   ID_CHG_DET                            BIT(1)
  68 #define   VBUS_WAKEUP_INT_EN                    BIT(8)
  69 #define   VBUS_WAKEUP_CHG_DET                   BIT(9)
  70 #define   VBUS_WAKEUP_STS                       BIT(10)
  71 #define   VBUS_WAKEUP_WAKEUP_EN                 BIT(30)
  72
  73 #define USB1_LEGACY_CTRL                        0x410
  74 #define   USB1_NO_LEGACY_MODE                   BIT(0)
  75 #define   USB1_VBUS_SENSE_CTL_MASK              (3 << 1)
  76 #define   USB1_VBUS_SENSE_CTL_VBUS_WAKEUP       (0 << 1)
  77 #define   USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
  78                                                 (1 << 1)
  79 #define   USB1_VBUS_SENSE_CTL_AB_SESS_VLD       (2 << 1)
  80 #define   USB1_VBUS_SENSE_CTL_A_SESS_VLD        (3 << 1)
  81
  82 #define ULPI_TIMING_CTRL_0                      0x424
  83 #define   ULPI_OUTPUT_PINMUX_BYP                BIT(10)
  84 #define   ULPI_CLKOUT_PINMUX_BYP                BIT(11)
  85
  86 #define ULPI_TIMING_CTRL_1                      0x428
  87 #define   ULPI_DATA_TRIMMER_LOAD                BIT(0)
  88 #define   ULPI_DATA_TRIMMER_SEL(x)              (((x) & 0x7) << 1)
  89 #define   ULPI_STPDIRNXT_TRIMMER_LOAD           BIT(16)
  90 #define   ULPI_STPDIRNXT_TRIMMER_SEL(x)         (((x) & 0x7) << 17)
  91 #define   ULPI_DIR_TRIMMER_LOAD                 BIT(24)
  92 #define   ULPI_DIR_TRIMMER_SEL(x)               (((x) & 0x7) << 25)
  93
  94 #define UTMIP_PLL_CFG1                          0x804
  95 #define   UTMIP_XTAL_FREQ_COUNT(x)              (((x) & 0xfff) << 0)
  96 #define   UTMIP_PLLU_ENABLE_DLY_COUNT(x)        (((x) & 0x1f) << 27)
  97
  98 #define UTMIP_XCVR_CFG0                         0x808
  99 #define   UTMIP_XCVR_SETUP(x)                   (((x) & 0xf) << 0)
 100 #define   UTMIP_XCVR_SETUP_MSB(x)               ((((x) & 0x70) >> 4) << 22)
 101 #define   UTMIP_XCVR_LSRSLEW(x)                 (((x) & 0x3) << 8)
 102 #define   UTMIP_XCVR_LSFSLEW(x)                 (((x) & 0x3) << 10)
 103 #define   UTMIP_FORCE_PD_POWERDOWN              BIT(14)
 104 #define   UTMIP_FORCE_PD2_POWERDOWN             BIT(16)
 105 #define   UTMIP_FORCE_PDZI_POWERDOWN            BIT(18)
 106 #define   UTMIP_XCVR_LSBIAS_SEL                 BIT(21)
 107 #define   UTMIP_XCVR_HSSLEW(x)                  (((x) & 0x3) << 4)
 108 #define   UTMIP_XCVR_HSSLEW_MSB(x)              ((((x) & 0x1fc) >> 2) << 25)
 109
 110 #define UTMIP_BIAS_CFG0                         0x80c
 111 #define   UTMIP_OTGPD                           BIT(11)
 112 #define   UTMIP_BIASPD                          BIT(10)
 113 #define   UTMIP_HSSQUELCH_LEVEL(x)              (((x) & 0x3) << 0)
 114 #define   UTMIP_HSDISCON_LEVEL(x)               (((x) & 0x3) << 2)
 115 #define   UTMIP_HSDISCON_LEVEL_MSB(x)           ((((x) & 0x4) >> 2) << 24)
 116
 117 #define UTMIP_HSRX_CFG0                         0x810
 118 #define   UTMIP_ELASTIC_LIMIT(x)                (((x) & 0x1f) << 10)
 119 #define   UTMIP_IDLE_WAIT(x)                    (((x) & 0x1f) << 15)
 120
 121 #define UTMIP_HSRX_CFG1                         0x814
 122 #define   UTMIP_HS_SYNC_START_DLY(x)            (((x) & 0x1f) << 1)
 123
 124 #define UTMIP_TX_CFG0                           0x820
 125 #define   UTMIP_FS_PREABMLE_J                   BIT(19)
 126 #define   UTMIP_HS_DISCON_DISABLE               BIT(8)
 127
 128 #define UTMIP_MISC_CFG0                         0x824
 129 #define   UTMIP_DPDM_OBSERVE                    BIT(26)
 130 #define   UTMIP_DPDM_OBSERVE_SEL(x)             (((x) & 0xf) << 27)
 131 #define   UTMIP_DPDM_OBSERVE_SEL_FS_J           UTMIP_DPDM_OBSERVE_SEL(0xf)
 132 #define   UTMIP_DPDM_OBSERVE_SEL_FS_K           UTMIP_DPDM_OBSERVE_SEL(0xe)
 133 #define   UTMIP_DPDM_OBSERVE_SEL_FS_SE1         UTMIP_DPDM_OBSERVE_SEL(0xd)
 134 #define   UTMIP_DPDM_OBSERVE_SEL_FS_SE0         UTMIP_DPDM_OBSERVE_SEL(0xc)
 135 #define   UTMIP_SUSPEND_EXIT_ON_EDGE            BIT(22)
 136
 137 #define UTMIP_MISC_CFG1                         0x828
 138 #define   UTMIP_PLL_ACTIVE_DLY_COUNT(x)         (((x) & 0x1f) << 18)
 139 #define   UTMIP_PLLU_STABLE_COUNT(x)            (((x) & 0xfff) << 6)
 140
 141 #define UTMIP_DEBOUNCE_CFG0                     0x82c
 142 #define   UTMIP_BIAS_DEBOUNCE_A(x)              (((x) & 0xffff) << 0)
 143
 144 #define UTMIP_BAT_CHRG_CFG0                     0x830
 145 #define   UTMIP_PD_CHRG                         BIT(0)
 146
 147 #define UTMIP_SPARE_CFG0                        0x834
 148 #define   FUSE_SETUP_SEL                        BIT(3)
 149
 150 #define UTMIP_XCVR_CFG1                         0x838
 151 #define   UTMIP_FORCE_PDDISC_POWERDOWN          BIT(0)
 152 #define   UTMIP_FORCE_PDCHRP_POWERDOWN          BIT(2)
 153 #define   UTMIP_FORCE_PDDR_POWERDOWN            BIT(4)
 154 #define   UTMIP_XCVR_TERM_RANGE_ADJ(x)          (((x) & 0xf) << 18)
 155
 156 #define UTMIP_BIAS_CFG1                         0x83c
 157 #define   UTMIP_BIAS_PDTRK_COUNT(x)             (((x) & 0x1f) << 3)
 158
 159 /* For Tegra30 and above only, the address is different in Tegra20 */
 160 #define USB_USBMODE                             0x1f8
 161 #define   USB_USBMODE_MASK                      (3 << 0)
 162 #define   USB_USBMODE_HOST                      (3 << 0)
 163 #define   USB_USBMODE_DEVICE                    (2 << 0)
 164
 165 #define PMC_USB_AO                              0xf0
 166 #define   VBUS_WAKEUP_PD_P0                     BIT(2)
 167 #define   ID_PD_P0                              BIT(3)
 168
 169 static DEFINE_SPINLOCK(utmip_pad_lock);
 170 static unsigned int utmip_pad_count;
 171
 172 struct tegra_xtal_freq {
 173         unsigned int freq;
 174         u8 enable_delay;
 175         u8 stable_count;
 176         u8 active_delay;
 177         u8 xtal_freq_count;
 178         u16 debounce;
 179 };
 180
 181 static const struct tegra_xtal_freq tegra_freq_table[] = {
 182         {
 183                 .freq = 12000000,
 184                 .enable_delay = 0x02,
 185                 .stable_count = 0x2F,
 186                 .active_delay = 0x04,
 187                 .xtal_freq_count = 0x76,
 188                 .debounce = 0x7530,
 189         },
 190         {
 191                 .freq = 13000000,
 192                 .enable_delay = 0x02,
 193                 .stable_count = 0x33,
 194                 .active_delay = 0x05,
 195                 .xtal_freq_count = 0x7F,
 196                 .debounce = 0x7EF4,
 197         },
 198         {
 199                 .freq = 19200000,
 200                 .enable_delay = 0x03,
 201                 .stable_count = 0x4B,
 202                 .active_delay = 0x06,
 203                 .xtal_freq_count = 0xBB,
 204                 .debounce = 0xBB80,
 205         },
 206         {
 207                 .freq = 26000000,
 208                 .enable_delay = 0x04,
 209                 .stable_count = 0x66,
 210                 .active_delay = 0x09,
 211                 .xtal_freq_count = 0xFE,
 212                 .debounce = 0xFDE8,
 213         },
 214 };
 215
 216 static inline struct tegra_usb_phy *to_tegra_usb_phy(struct usb_phy *u_phy)
 217 {
 218         return container_of(u_phy, struct tegra_usb_phy, u_phy);
 219 }
 220
 221 static void set_pts(struct tegra_usb_phy *phy, u8 pts_val)
 222 {
 223         void __iomem *base = phy->regs;
 224         u32 val;
 225
 226         if (phy->soc_config->has_hostpc) {
 227                 val = readl_relaxed(base + TEGRA_USB_HOSTPC1_DEVLC);
 228                 val &= ~TEGRA_USB_HOSTPC1_DEVLC_PTS(~0);
 229                 val |= TEGRA_USB_HOSTPC1_DEVLC_PTS(pts_val);
 230                 writel_relaxed(val, base + TEGRA_USB_HOSTPC1_DEVLC);
 231         } else {
 232                 val = readl_relaxed(base + TEGRA_USB_PORTSC1);
 233                 val &= ~TEGRA_PORTSC1_RWC_BITS;
 234                 val &= ~TEGRA_USB_PORTSC1_PTS(~0);
 235                 val |= TEGRA_USB_PORTSC1_PTS(pts_val);
 236                 writel_relaxed(val, base + TEGRA_USB_PORTSC1);
 237         }
 238 }
 239
 240 static void set_phcd(struct tegra_usb_phy *phy, bool enable)
 241 {
 242         void __iomem *base = phy->regs;
 243         u32 val;
 244
 245         if (phy->soc_config->has_hostpc) {
 246                 val = readl_relaxed(base + TEGRA_USB_HOSTPC1_DEVLC);
 247                 if (enable)
 248                         val |= TEGRA_USB_HOSTPC1_DEVLC_PHCD;
 249                 else
 250                         val &= ~TEGRA_USB_HOSTPC1_DEVLC_PHCD;
 251                 writel_relaxed(val, base + TEGRA_USB_HOSTPC1_DEVLC);
 252         } else {
 253                 val = readl_relaxed(base + TEGRA_USB_PORTSC1) & ~PORT_RWC_BITS;
 254                 if (enable)
 255                         val |= TEGRA_USB_PORTSC1_PHCD;
 256                 else
 257                         val &= ~TEGRA_USB_PORTSC1_PHCD;
 258                 writel_relaxed(val, base + TEGRA_USB_PORTSC1);
 259         }
 260 }
 261
 262 static int utmip_pad_open(struct tegra_usb_phy *phy)
 263 {
 264         int ret;
 265
 266         ret = clk_prepare_enable(phy->pad_clk);
 267         if (ret) {
 268                 dev_err(phy->u_phy.dev,
 269                         "Failed to enable UTMI-pads clock: %d\n", ret);
 270                 return ret;
 271         }
 272
 273         spin_lock(&utmip_pad_lock);
 274
 275         ret = reset_control_deassert(phy->pad_rst);
 276         if (ret) {
 277                 dev_err(phy->u_phy.dev,
 278                         "Failed to initialize UTMI-pads reset: %d\n", ret);
 279                 goto unlock;
 280         }
 281
 282         ret = reset_control_assert(phy->pad_rst);
 283         if (ret) {
 284                 dev_err(phy->u_phy.dev,
 285                         "Failed to assert UTMI-pads reset: %d\n", ret);
 286                 goto unlock;
 287         }
 288
 289         udelay(1);
 290
 291         ret = reset_control_deassert(phy->pad_rst);
 292         if (ret)
 293                 dev_err(phy->u_phy.dev,
 294                         "Failed to deassert UTMI-pads reset: %d\n", ret);
 295 unlock:
 296         spin_unlock(&utmip_pad_lock);
 297
 298         clk_disable_unprepare(phy->pad_clk);
 299
 300         return ret;
 301 }
 302
 303 static int utmip_pad_close(struct tegra_usb_phy *phy)
 304 {
 305         int ret;
 306
 307         ret = clk_prepare_enable(phy->pad_clk);
 308         if (ret) {
 309                 dev_err(phy->u_phy.dev,
 310                         "Failed to enable UTMI-pads clock: %d\n", ret);
 311                 return ret;
 312         }
 313
 314         ret = reset_control_assert(phy->pad_rst);
 315         if (ret)
 316                 dev_err(phy->u_phy.dev,
 317                         "Failed to assert UTMI-pads reset: %d\n", ret);
 318
 319         udelay(1);
 320
 321         clk_disable_unprepare(phy->pad_clk);
 322
 323         return ret;
 324 }
 325
 326 static int utmip_pad_power_on(struct tegra_usb_phy *phy)
 327 {
 328         struct tegra_utmip_config *config = phy->config;
 329         void __iomem *base = phy->pad_regs;
 330         u32 val;
 331         int err;
 332
 333         err = clk_prepare_enable(phy->pad_clk);
 334         if (err)
 335                 return err;
 336
 337         spin_lock(&utmip_pad_lock);
 338
 339         if (utmip_pad_count++ == 0) {
 340                 val = readl_relaxed(base + UTMIP_BIAS_CFG0);
 341                 val &= ~(UTMIP_OTGPD | UTMIP_BIASPD);
 342
 343                 if (phy->soc_config->requires_extra_tuning_parameters) {
 344                         val &= ~(UTMIP_HSSQUELCH_LEVEL(~0) |
 345                                 UTMIP_HSDISCON_LEVEL(~0) |
 346                                 UTMIP_HSDISCON_LEVEL_MSB(~0));
 347
 348                         val |= UTMIP_HSSQUELCH_LEVEL(config->hssquelch_level);
 349                         val |= UTMIP_HSDISCON_LEVEL(config->hsdiscon_level);
 350                         val |= UTMIP_HSDISCON_LEVEL_MSB(config->hsdiscon_level);
 351                 }
 352                 writel_relaxed(val, base + UTMIP_BIAS_CFG0);
 353         }
 354
 355         if (phy->pad_wakeup) {
 356                 phy->pad_wakeup = false;
 357                 utmip_pad_count--;
 358         }
 359
 360         spin_unlock(&utmip_pad_lock);
 361
 362         clk_disable_unprepare(phy->pad_clk);
 363
 364         return 0;
 365 }
 366
 367 static int utmip_pad_power_off(struct tegra_usb_phy *phy)
 368 {
 369         void __iomem *base = phy->pad_regs;
 370         u32 val;
 371         int ret;
 372
 373         ret = clk_prepare_enable(phy->pad_clk);
 374         if (ret)
 375                 return ret;
 376
 377         spin_lock(&utmip_pad_lock);
 378
 379         if (!utmip_pad_count) {
 380                 dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n");
 381                 ret = -EINVAL;
 382                 goto ulock;
 383         }
 384
 385         /*
 386          * In accordance to TRM, OTG and Bias pad circuits could be turned off
 387          * to save power if wake is enabled, but the VBUS-change detection
 388          * method is board-specific and these circuits may need to be enabled
 389          * to generate wakeup event, hence we will just keep them both enabled.
 390          */
 391         if (phy->wakeup_enabled) {
 392                 phy->pad_wakeup = true;
 393                 utmip_pad_count++;
 394         }
 395
 396         if (--utmip_pad_count == 0) {
 397                 val = readl_relaxed(base + UTMIP_BIAS_CFG0);
 398                 val |= UTMIP_OTGPD | UTMIP_BIASPD;
 399                 writel_relaxed(val, base + UTMIP_BIAS_CFG0);
 400         }
 401 ulock:
 402         spin_unlock(&utmip_pad_lock);
 403
 404         clk_disable_unprepare(phy->pad_clk);
 405
 406         return ret;
 407 }
 408
 409 static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
 410 {
 411         u32 tmp;
 412
 413         return readl_relaxed_poll_timeout(reg, tmp, (tmp & mask) == result,
 414                                           2000, 6000);
 415 }
 416
 417 static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
 418 {
 419         void __iomem *base = phy->regs;
 420         u32 val;
 421
 422         /*
 423          * The USB driver may have already initiated the phy clock
 424          * disable so wait to see if the clock turns off and if not
 425          * then proceed with gating the clock.
 426          */
 427         if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) == 0)
 428                 return;
 429
 430         if (phy->is_legacy_phy) {
 431                 val = readl_relaxed(base + USB_SUSP_CTRL);
 432                 val |= USB_SUSP_SET;
 433                 writel_relaxed(val, base + USB_SUSP_CTRL);
 434
 435                 usleep_range(10, 100);
 436
 437                 val = readl_relaxed(base + USB_SUSP_CTRL);
 438                 val &= ~USB_SUSP_SET;
 439                 writel_relaxed(val, base + USB_SUSP_CTRL);
 440         } else {
 441                 set_phcd(phy, true);
 442         }
 443
 444         if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0))
 445                 dev_err(phy->u_phy.dev,
 446                         "Timeout waiting for PHY to stabilize on disable\n");
 447 }
 448
 449 static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
 450 {
 451         void __iomem *base = phy->regs;
 452         u32 val;
 453
 454         /*
 455          * The USB driver may have already initiated the phy clock
 456          * enable so wait to see if the clock turns on and if not
 457          * then proceed with ungating the clock.
 458          */
 459         if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
 460                                USB_PHY_CLK_VALID) == 0)
 461                 return;
 462
 463         if (phy->is_legacy_phy) {
 464                 val = readl_relaxed(base + USB_SUSP_CTRL);
 465                 val |= USB_SUSP_CLR;
 466                 writel_relaxed(val, base + USB_SUSP_CTRL);
 467
 468                 usleep_range(10, 100);
 469
 470                 val = readl_relaxed(base + USB_SUSP_CTRL);
 471                 val &= ~USB_SUSP_CLR;
 472                 writel_relaxed(val, base + USB_SUSP_CTRL);
 473         } else {
 474                 set_phcd(phy, false);
 475         }
 476
 477         if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
 478                                USB_PHY_CLK_VALID))
 479                 dev_err(phy->u_phy.dev,
 480                         "Timeout waiting for PHY to stabilize on enable\n");
 481 }
 482
 483 static int utmi_phy_power_on(struct tegra_usb_phy *phy)
 484 {
 485         struct tegra_utmip_config *config = phy->config;
 486         void __iomem *base = phy->regs;
 487         u32 val;
 488         int err;
 489
 490         val = readl_relaxed(base + USB_SUSP_CTRL);
 491         val |= UTMIP_RESET;
 492         writel_relaxed(val, base + USB_SUSP_CTRL);
 493
 494         if (phy->is_legacy_phy) {
 495                 val = readl_relaxed(base + USB1_LEGACY_CTRL);
 496                 val |= USB1_NO_LEGACY_MODE;
 497                 writel_relaxed(val, base + USB1_LEGACY_CTRL);
 498         }
 499
 500         val = readl_relaxed(base + UTMIP_TX_CFG0);
 501         val |= UTMIP_FS_PREABMLE_J;
 502         writel_relaxed(val, base + UTMIP_TX_CFG0);
 503
 504         val = readl_relaxed(base + UTMIP_HSRX_CFG0);
 505         val &= ~(UTMIP_IDLE_WAIT(~0) | UTMIP_ELASTIC_LIMIT(~0));
 506         val |= UTMIP_IDLE_WAIT(config->idle_wait_delay);
 507         val |= UTMIP_ELASTIC_LIMIT(config->elastic_limit);
 508         writel_relaxed(val, base + UTMIP_HSRX_CFG0);
 509
 510         val = readl_relaxed(base + UTMIP_HSRX_CFG1);
 511         val &= ~UTMIP_HS_SYNC_START_DLY(~0);
 512         val |= UTMIP_HS_SYNC_START_DLY(config->hssync_start_delay);
 513         writel_relaxed(val, base + UTMIP_HSRX_CFG1);
 514
 515         val = readl_relaxed(base + UTMIP_DEBOUNCE_CFG0);
 516         val &= ~UTMIP_BIAS_DEBOUNCE_A(~0);
 517         val |= UTMIP_BIAS_DEBOUNCE_A(phy->freq->debounce);
 518         writel_relaxed(val, base + UTMIP_DEBOUNCE_CFG0);
 519
 520         val = readl_relaxed(base + UTMIP_MISC_CFG0);
 521         val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE;
 522         writel_relaxed(val, base + UTMIP_MISC_CFG0);
 523
 524         if (!phy->soc_config->utmi_pll_config_in_car_module) {
 525                 val = readl_relaxed(base + UTMIP_MISC_CFG1);
 526                 val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) |
 527                         UTMIP_PLLU_STABLE_COUNT(~0));
 528                 val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) |
 529                         UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count);
 530                 writel_relaxed(val, base + UTMIP_MISC_CFG1);
 531
 532                 val = readl_relaxed(base + UTMIP_PLL_CFG1);
 533                 val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) |
 534                         UTMIP_PLLU_ENABLE_DLY_COUNT(~0));
 535                 val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) |
 536                         UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay);
 537                 writel_relaxed(val, base + UTMIP_PLL_CFG1);
 538         }
 539
 540         val = readl_relaxed(base + USB_SUSP_CTRL);
 541         val &= ~USB_WAKE_ON_RESUME_EN;
 542         writel_relaxed(val, base + USB_SUSP_CTRL);
 543
 544         if (phy->mode != USB_DR_MODE_HOST) {
 545                 val = readl_relaxed(base + USB_SUSP_CTRL);
 546                 val &= ~(USB_WAKE_ON_CNNT_EN_DEV | USB_WAKE_ON_DISCON_EN_DEV);
 547                 writel_relaxed(val, base + USB_SUSP_CTRL);
 548
 549                 val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
 550                 val &= ~VBUS_WAKEUP_WAKEUP_EN;
 551                 val &= ~(ID_CHG_DET | VBUS_WAKEUP_CHG_DET);
 552                 writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
 553
 554                 val = readl_relaxed(base + USB_PHY_VBUS_SENSORS);
 555                 val &= ~(A_VBUS_VLD_WAKEUP_EN | A_SESS_VLD_WAKEUP_EN);
 556                 val &= ~(B_SESS_VLD_WAKEUP_EN);
 557                 writel_relaxed(val, base + USB_PHY_VBUS_SENSORS);
 558
 559                 val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0);
 560                 val &= ~UTMIP_PD_CHRG;
 561                 writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0);
 562         } else {
 563                 val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0);
 564                 val |= UTMIP_PD_CHRG;
 565                 writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0);
 566         }
 567
 568         err = utmip_pad_power_on(phy);
 569         if (err)
 570                 return err;
 571
 572         val = readl_relaxed(base + UTMIP_XCVR_CFG0);
 573         val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
 574                  UTMIP_FORCE_PDZI_POWERDOWN | UTMIP_XCVR_LSBIAS_SEL |
 575                  UTMIP_XCVR_SETUP(~0) | UTMIP_XCVR_SETUP_MSB(~0) |
 576                  UTMIP_XCVR_LSFSLEW(~0) | UTMIP_XCVR_LSRSLEW(~0));
 577
 578         if (!config->xcvr_setup_use_fuses) {
 579                 val |= UTMIP_XCVR_SETUP(config->xcvr_setup);
 580                 val |= UTMIP_XCVR_SETUP_MSB(config->xcvr_setup);
 581         }
 582         val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew);
 583         val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew);
 584
 585         if (phy->soc_config->requires_extra_tuning_parameters) {
 586                 val &= ~(UTMIP_XCVR_HSSLEW(~0) | UTMIP_XCVR_HSSLEW_MSB(~0));
 587                 val |= UTMIP_XCVR_HSSLEW(config->xcvr_hsslew);
 588                 val |= UTMIP_XCVR_HSSLEW_MSB(config->xcvr_hsslew);
 589         }
 590         writel_relaxed(val, base + UTMIP_XCVR_CFG0);
 591
 592         val = readl_relaxed(base + UTMIP_XCVR_CFG1);
 593         val &= ~(UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
 594                  UTMIP_FORCE_PDDR_POWERDOWN | UTMIP_XCVR_TERM_RANGE_ADJ(~0));
 595         val |= UTMIP_XCVR_TERM_RANGE_ADJ(config->term_range_adj);
 596         writel_relaxed(val, base + UTMIP_XCVR_CFG1);
 597
 598         val = readl_relaxed(base + UTMIP_BIAS_CFG1);
 599         val &= ~UTMIP_BIAS_PDTRK_COUNT(~0);
 600         val |= UTMIP_BIAS_PDTRK_COUNT(0x5);
 601         writel_relaxed(val, base + UTMIP_BIAS_CFG1);
 602
 603         val = readl_relaxed(base + UTMIP_SPARE_CFG0);
 604         if (config->xcvr_setup_use_fuses)
 605                 val |= FUSE_SETUP_SEL;
 606         else
 607                 val &= ~FUSE_SETUP_SEL;
 608         writel_relaxed(val, base + UTMIP_SPARE_CFG0);
 609
 610         if (!phy->is_legacy_phy) {
 611                 val = readl_relaxed(base + USB_SUSP_CTRL);
 612                 val |= UTMIP_PHY_ENABLE;
 613                 writel_relaxed(val, base + USB_SUSP_CTRL);
 614         }
 615
 616         val = readl_relaxed(base + USB_SUSP_CTRL);
 617         val &= ~UTMIP_RESET;
 618         writel_relaxed(val, base + USB_SUSP_CTRL);
 619
 620         if (phy->is_legacy_phy) {
 621                 val = readl_relaxed(base + USB1_LEGACY_CTRL);
 622                 val &= ~USB1_VBUS_SENSE_CTL_MASK;
 623                 val |= USB1_VBUS_SENSE_CTL_A_SESS_VLD;
 624                 writel_relaxed(val, base + USB1_LEGACY_CTRL);
 625
 626                 val = readl_relaxed(base + USB_SUSP_CTRL);
 627                 val &= ~USB_SUSP_SET;
 628                 writel_relaxed(val, base + USB_SUSP_CTRL);
 629         }
 630
 631         utmi_phy_clk_enable(phy);
 632
 633         if (phy->soc_config->requires_usbmode_setup) {
 634                 val = readl_relaxed(base + USB_USBMODE);
 635                 val &= ~USB_USBMODE_MASK;
 636                 if (phy->mode == USB_DR_MODE_HOST)
 637                         val |= USB_USBMODE_HOST;
 638                 else
 639                         val |= USB_USBMODE_DEVICE;
 640                 writel_relaxed(val, base + USB_USBMODE);
 641         }
 642
 643         if (!phy->is_legacy_phy)
 644                 set_pts(phy, 0);
 645
 646         return 0;
 647 }
 648
 649 static int utmi_phy_power_off(struct tegra_usb_phy *phy)
 650 {
 651         void __iomem *base = phy->regs;
 652         u32 val;
 653
 654         /*
 655          * Give hardware time to settle down after VBUS disconnection,
 656          * otherwise PHY will immediately wake up from suspend.
 657          */
 658         if (phy->wakeup_enabled && phy->mode != USB_DR_MODE_HOST)
 659                 readl_relaxed_poll_timeout(base + USB_PHY_VBUS_WAKEUP_ID,
 660                                            val, !(val & VBUS_WAKEUP_STS),
 661                                            5000, 100000);
 662
 663         utmi_phy_clk_disable(phy);
 664
 665         /* PHY won't resume if reset is asserted */
 666         if (!phy->wakeup_enabled) {
 667                 val = readl_relaxed(base + USB_SUSP_CTRL);
 668                 val |= UTMIP_RESET;
 669                 writel_relaxed(val, base + USB_SUSP_CTRL);
 670         }
 671
 672         val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0);
 673         val |= UTMIP_PD_CHRG;
 674         writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0);
 675
 676         if (!phy->wakeup_enabled) {
 677                 val = readl_relaxed(base + UTMIP_XCVR_CFG0);
 678                 val |= UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
 679                        UTMIP_FORCE_PDZI_POWERDOWN;
 680                 writel_relaxed(val, base + UTMIP_XCVR_CFG0);
 681         }
 682
 683         val = readl_relaxed(base + UTMIP_XCVR_CFG1);
 684         val |= UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
 685                UTMIP_FORCE_PDDR_POWERDOWN;
 686         writel_relaxed(val, base + UTMIP_XCVR_CFG1);
 687
 688         if (phy->wakeup_enabled) {
 689                 val = readl_relaxed(base + USB_SUSP_CTRL);
 690                 val &= ~USB_WAKEUP_DEBOUNCE_COUNT(~0);
 691                 val |= USB_WAKEUP_DEBOUNCE_COUNT(5);
 692                 val |= USB_WAKE_ON_RESUME_EN;
 693                 writel_relaxed(val, base + USB_SUSP_CTRL);
 694
 695                 /*
 696                  * Ask VBUS sensor to generate wake event once cable is
 697                  * connected.
 698                  */
 699                 if (phy->mode != USB_DR_MODE_HOST) {
 700                         val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
 701                         val |= VBUS_WAKEUP_WAKEUP_EN;
 702                         val &= ~(ID_CHG_DET | VBUS_WAKEUP_CHG_DET);
 703                         writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
 704
 705                         val = readl_relaxed(base + USB_PHY_VBUS_SENSORS);
 706                         val |= A_VBUS_VLD_WAKEUP_EN;
 707                         writel_relaxed(val, base + USB_PHY_VBUS_SENSORS);
 708                 }
 709         }
 710
 711         return utmip_pad_power_off(phy);
 712 }
 713
 714 static void utmi_phy_preresume(struct tegra_usb_phy *phy)
 715 {
 716         void __iomem *base = phy->regs;
 717         u32 val;
 718
 719         val = readl_relaxed(base + UTMIP_TX_CFG0);
 720         val |= UTMIP_HS_DISCON_DISABLE;
 721         writel_relaxed(val, base + UTMIP_TX_CFG0);
 722 }
 723
 724 static void utmi_phy_postresume(struct tegra_usb_phy *phy)
 725 {
 726         void __iomem *base = phy->regs;
 727         u32 val;
 728
 729         val = readl_relaxed(base + UTMIP_TX_CFG0);
 730         val &= ~UTMIP_HS_DISCON_DISABLE;
 731         writel_relaxed(val, base + UTMIP_TX_CFG0);
 732 }
 733
 734 static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
 735                                    enum tegra_usb_phy_port_speed port_speed)
 736 {
 737         void __iomem *base = phy->regs;
 738         u32 val;
 739
 740         val = readl_relaxed(base + UTMIP_MISC_CFG0);
 741         val &= ~UTMIP_DPDM_OBSERVE_SEL(~0);
 742         if (port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
 743                 val |= UTMIP_DPDM_OBSERVE_SEL_FS_K;
 744         else
 745                 val |= UTMIP_DPDM_OBSERVE_SEL_FS_J;
 746         writel_relaxed(val, base + UTMIP_MISC_CFG0);
 747         usleep_range(1, 10);
 748
 749         val = readl_relaxed(base + UTMIP_MISC_CFG0);
 750         val |= UTMIP_DPDM_OBSERVE;
 751         writel_relaxed(val, base + UTMIP_MISC_CFG0);
 752         usleep_range(10, 100);
 753 }
 754
 755 static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
 756 {
 757         void __iomem *base = phy->regs;
 758         u32 val;
 759
 760         val = readl_relaxed(base + UTMIP_MISC_CFG0);
 761         val &= ~UTMIP_DPDM_OBSERVE;
 762         writel_relaxed(val, base + UTMIP_MISC_CFG0);
 763         usleep_range(10, 100);
 764 }
 765
 766 static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
 767 {
 768         void __iomem *base = phy->regs;
 769         u32 val;
 770         int err;
 771
 772         gpiod_set_value_cansleep(phy->reset_gpio, 1);
 773
 774         err = clk_prepare_enable(phy->clk);
 775         if (err)
 776                 return err;
 777
 778         usleep_range(5000, 6000);
 779
 780         gpiod_set_value_cansleep(phy->reset_gpio, 0);
 781
 782         usleep_range(1000, 2000);
 783
 784         val = readl_relaxed(base + USB_SUSP_CTRL);
 785         val |= UHSIC_RESET;
 786         writel_relaxed(val, base + USB_SUSP_CTRL);
 787
 788         val = readl_relaxed(base + ULPI_TIMING_CTRL_0);
 789         val |= ULPI_OUTPUT_PINMUX_BYP | ULPI_CLKOUT_PINMUX_BYP;
 790         writel_relaxed(val, base + ULPI_TIMING_CTRL_0);
 791
 792         val = readl_relaxed(base + USB_SUSP_CTRL);
 793         val |= ULPI_PHY_ENABLE;
 794         writel_relaxed(val, base + USB_SUSP_CTRL);
 795
 796         val = 0;
 797         writel_relaxed(val, base + ULPI_TIMING_CTRL_1);
 798
 799         val |= ULPI_DATA_TRIMMER_SEL(4);
 800         val |= ULPI_STPDIRNXT_TRIMMER_SEL(4);
 801         val |= ULPI_DIR_TRIMMER_SEL(4);
 802         writel_relaxed(val, base + ULPI_TIMING_CTRL_1);
 803         usleep_range(10, 100);
 804
 805         val |= ULPI_DATA_TRIMMER_LOAD;
 806         val |= ULPI_STPDIRNXT_TRIMMER_LOAD;
 807         val |= ULPI_DIR_TRIMMER_LOAD;
 808         writel_relaxed(val, base + ULPI_TIMING_CTRL_1);
 809
 810         /* Fix VbusInvalid due to floating VBUS */
 811         err = usb_phy_io_write(phy->ulpi, 0x40, 0x08);
 812         if (err) {
 813                 dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", err);
 814                 goto disable_clk;
 815         }
 816
 817         err = usb_phy_io_write(phy->ulpi, 0x80, 0x0B);
 818         if (err) {
 819                 dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", err);
 820                 goto disable_clk;
 821         }
 822
 823         val = readl_relaxed(base + USB_SUSP_CTRL);
 824         val |= USB_SUSP_CLR;
 825         writel_relaxed(val, base + USB_SUSP_CTRL);
 826         usleep_range(100, 1000);
 827
 828         val = readl_relaxed(base + USB_SUSP_CTRL);
 829         val &= ~USB_SUSP_CLR;
 830         writel_relaxed(val, base + USB_SUSP_CTRL);
 831
 832         return 0;
 833
 834 disable_clk:
 835         clk_disable_unprepare(phy->clk);
 836
 837         return err;
 838 }
 839
 840 static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
 841 {
 842         gpiod_set_value_cansleep(phy->reset_gpio, 1);
 843         usleep_range(5000, 6000);
 844         clk_disable_unprepare(phy->clk);
 845
 846         /*
 847          * Wakeup currently unimplemented for ULPI, thus PHY needs to be
 848          * force-resumed.
 849          */
 850         if (WARN_ON_ONCE(phy->wakeup_enabled)) {
 851                 ulpi_phy_power_on(phy);
 852                 return -EOPNOTSUPP;
 853         }
 854
 855         return 0;
 856 }
 857
 858 static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
 859 {
 860         int err;
 861
 862         if (phy->powered_on)
 863                 return 0;
 864
 865         if (phy->is_ulpi_phy)
 866                 err = ulpi_phy_power_on(phy);
 867         else
 868                 err = utmi_phy_power_on(phy);
 869         if (err)
 870                 return err;
 871
 872         phy->powered_on = true;
 873
 874         /* Let PHY settle down */
 875         usleep_range(2000, 2500);
 876
 877         return 0;
 878 }
 879
 880 static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
 881 {
 882         int err;
 883
 884         if (!phy->powered_on)
 885                 return 0;
 886
 887         if (phy->is_ulpi_phy)
 888                 err = ulpi_phy_power_off(phy);
 889         else
 890                 err = utmi_phy_power_off(phy);
 891         if (err)
 892                 return err;
 893
 894         phy->powered_on = false;
 895
 896         return 0;
 897 }
 898
 899 static void tegra_usb_phy_shutdown(struct usb_phy *u_phy)
 900 {
 901         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
 902
 903         if (WARN_ON(!phy->freq))
 904                 return;
 905
 906         usb_phy_set_wakeup(u_phy, false);
 907         tegra_usb_phy_power_off(phy);
 908
 909         if (!phy->is_ulpi_phy)
 910                 utmip_pad_close(phy);
 911
 912         regulator_disable(phy->vbus);
 913         clk_disable_unprepare(phy->pll_u);
 914
 915         phy->freq = NULL;
 916 }
 917
 918 static irqreturn_t tegra_usb_phy_isr(int irq, void *data)
 919 {
 920         u32 val, int_mask = ID_CHG_DET | VBUS_WAKEUP_CHG_DET;
 921         struct tegra_usb_phy *phy = data;
 922         void __iomem *base = phy->regs;
 923
 924         /*
 925          * The PHY interrupt also wakes the USB controller driver since
 926          * interrupt is shared. We don't do anything in the PHY driver,
 927          * so just clear the interrupt.
 928          */
 929         val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
 930         writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
 931
 932         return val & int_mask ? IRQ_HANDLED : IRQ_NONE;
 933 }
 934
 935 static int tegra_usb_phy_set_wakeup(struct usb_phy *u_phy, bool enable)
 936 {
 937         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
 938         void __iomem *base = phy->regs;
 939         int ret = 0;
 940         u32 val;
 941
 942         if (phy->wakeup_enabled && phy->mode != USB_DR_MODE_HOST &&
 943             phy->irq > 0) {
 944                 disable_irq(phy->irq);
 945
 946                 val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
 947                 val &= ~(ID_INT_EN | VBUS_WAKEUP_INT_EN);
 948                 writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
 949
 950                 enable_irq(phy->irq);
 951
 952                 free_irq(phy->irq, phy);
 953
 954                 phy->wakeup_enabled = false;
 955         }
 956
 957         if (enable && phy->mode != USB_DR_MODE_HOST && phy->irq > 0) {
 958                 ret = request_irq(phy->irq, tegra_usb_phy_isr, IRQF_SHARED,
 959                                   dev_name(phy->u_phy.dev), phy);
 960                 if (!ret) {
 961                         disable_irq(phy->irq);
 962
 963                         /*
 964                          * USB clock will be resumed once wake event will be
 965                          * generated.  The ID-change event requires to have
 966                          * interrupts enabled, otherwise it won't be generated.
 967                          */
 968                         val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID);
 969                         val |= ID_INT_EN | VBUS_WAKEUP_INT_EN;
 970                         writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID);
 971
 972                         enable_irq(phy->irq);
 973                 } else {
 974                         dev_err(phy->u_phy.dev,
 975                                 "Failed to request interrupt: %d", ret);
 976                         enable = false;
 977                 }
 978         }
 979
 980         phy->wakeup_enabled = enable;
 981
 982         return ret;
 983 }
 984
 985 static int tegra_usb_phy_set_suspend(struct usb_phy *u_phy, int suspend)
 986 {
 987         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
 988         int ret;
 989
 990         if (WARN_ON(!phy->freq))
 991                 return -EINVAL;
 992
 993         /*
 994          * PHY is sharing IRQ with the CI driver, hence here we either
 995          * disable interrupt for both PHY and CI or for CI only.  The
 996          * interrupt needs to be disabled while hardware is reprogrammed
 997          * because interrupt touches the programmed registers, and thus,
 998          * there could be a race condition.
 999          */
1000         if (phy->irq > 0)
1001                 disable_irq(phy->irq);
1002
1003         if (suspend)
1004                 ret = tegra_usb_phy_power_off(phy);
1005         else
1006                 ret = tegra_usb_phy_power_on(phy);
1007
1008         if (phy->irq > 0)
1009                 enable_irq(phy->irq);
1010
1011         return ret;
1012 }
1013
1014 static int tegra_usb_phy_configure_pmc(struct tegra_usb_phy *phy)
1015 {
1016         int err, val = 0;
1017
1018         /* older device-trees don't have PMC regmap */
1019         if (!phy->pmc_regmap)
1020                 return 0;
1021
1022         /*
1023          * Tegra20 has a different layout of PMC USB register bits and AO is
1024          * enabled by default after system reset on Tegra20, so assume nothing
1025          * to do on Tegra20.
1026          */
1027         if (!phy->soc_config->requires_pmc_ao_power_up)
1028                 return 0;
1029
1030         /* enable VBUS wake-up detector */
1031         if (phy->mode != USB_DR_MODE_HOST)
1032                 val |= VBUS_WAKEUP_PD_P0 << phy->instance * 4;
1033
1034         /* enable ID-pin ACC detector for OTG mode switching */
1035         if (phy->mode == USB_DR_MODE_OTG)
1036                 val |= ID_PD_P0 << phy->instance * 4;
1037
1038         /* disable detectors to reset them */
1039         err = regmap_set_bits(phy->pmc_regmap, PMC_USB_AO, val);
1040         if (err) {
1041                 dev_err(phy->u_phy.dev, "Failed to disable PMC AO: %d\n", err);
1042                 return err;
1043         }
1044
1045         usleep_range(10, 100);
1046
1047         /* enable detectors */
1048         err = regmap_clear_bits(phy->pmc_regmap, PMC_USB_AO, val);
1049         if (err) {
1050                 dev_err(phy->u_phy.dev, "Failed to enable PMC AO: %d\n", err);
1051                 return err;
1052         }
1053
1054         /* detectors starts to work after 10ms */
1055         usleep_range(10000, 15000);
1056
1057         return 0;
1058 }
1059
1060 static int tegra_usb_phy_init(struct usb_phy *u_phy)
1061 {
1062         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1063         unsigned long parent_rate;
1064         unsigned int i;
1065         int err;
1066
1067         if (WARN_ON(phy->freq))
1068                 return 0;
1069
1070         err = clk_prepare_enable(phy->pll_u);
1071         if (err)
1072                 return err;
1073
1074         parent_rate = clk_get_rate(clk_get_parent(phy->pll_u));
1075         for (i = 0; i < ARRAY_SIZE(tegra_freq_table); i++) {
1076                 if (tegra_freq_table[i].freq == parent_rate) {
1077                         phy->freq = &tegra_freq_table[i];
1078                         break;
1079                 }
1080         }
1081         if (!phy->freq) {
1082                 dev_err(phy->u_phy.dev, "Invalid pll_u parent rate %ld\n",
1083                         parent_rate);
1084                 err = -EINVAL;
1085                 goto disable_clk;
1086         }
1087
1088         err = regulator_enable(phy->vbus);
1089         if (err) {
1090                 dev_err(phy->u_phy.dev,
1091                         "Failed to enable USB VBUS regulator: %d\n", err);
1092                 goto disable_clk;
1093         }
1094
1095         if (!phy->is_ulpi_phy) {
1096                 err = utmip_pad_open(phy);
1097                 if (err)
1098                         goto disable_vbus;
1099         }
1100
1101         err = tegra_usb_phy_configure_pmc(phy);
1102         if (err)
1103                 goto close_phy;
1104
1105         err = tegra_usb_phy_power_on(phy);
1106         if (err)
1107                 goto close_phy;
1108
1109         return 0;
1110
1111 close_phy:
1112         if (!phy->is_ulpi_phy)
1113                 utmip_pad_close(phy);
1114
1115 disable_vbus:
1116         regulator_disable(phy->vbus);
1117
1118 disable_clk:
1119         clk_disable_unprepare(phy->pll_u);
1120
1121         phy->freq = NULL;
1122
1123         return err;
1124 }
1125
1126 void tegra_usb_phy_preresume(struct usb_phy *u_phy)
1127 {
1128         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1129
1130         if (!phy->is_ulpi_phy)
1131                 utmi_phy_preresume(phy);
1132 }
1133 EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
1134
1135 void tegra_usb_phy_postresume(struct usb_phy *u_phy)
1136 {
1137         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1138
1139         if (!phy->is_ulpi_phy)
1140                 utmi_phy_postresume(phy);
1141 }
1142 EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
1143
1144 void tegra_ehci_phy_restore_start(struct usb_phy *u_phy,
1145                                   enum tegra_usb_phy_port_speed port_speed)
1146 {
1147         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1148
1149         if (!phy->is_ulpi_phy)
1150                 utmi_phy_restore_start(phy, port_speed);
1151 }
1152 EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
1153
1154 void tegra_ehci_phy_restore_end(struct usb_phy *u_phy)
1155 {
1156         struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy);
1157
1158         if (!phy->is_ulpi_phy)
1159                 utmi_phy_restore_end(phy);
1160 }
1161 EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
1162
1163 static int read_utmi_param(struct platform_device *pdev, const char *param,
1164                            u8 *dest)
1165 {
1166         u32 value;
1167         int err;
1168
1169         err = of_property_read_u32(pdev->dev.of_node, param, &value);
1170         if (err)
1171                 dev_err(&pdev->dev,
1172                         "Failed to read USB UTMI parameter %s: %d\n",
1173                         param, err);
1174         else
1175                 *dest = value;
1176
1177         return err;
1178 }
1179
1180 static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy,
1181                           struct platform_device *pdev)
1182 {
1183         struct tegra_utmip_config *config;
1184         struct resource *res;
1185         int err;
1186
1187         tegra_phy->is_ulpi_phy = false;
1188
1189         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1190         if (!res) {
1191                 dev_err(&pdev->dev, "Failed to get UTMI pad regs\n");
1192                 return  -ENXIO;
1193         }
1194
1195         /*
1196          * Note that UTMI pad registers are shared by all PHYs, therefore
1197          * devm_platform_ioremap_resource() can't be used here.
1198          */
1199         tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start,
1200                                            resource_size(res));
1201         if (!tegra_phy->pad_regs) {
1202                 dev_err(&pdev->dev, "Failed to remap UTMI pad regs\n");
1203                 return -ENOMEM;
1204         }
1205
1206         tegra_phy->config = devm_kzalloc(&pdev->dev, sizeof(*config),
1207                                          GFP_KERNEL);
1208         if (!tegra_phy->config)
1209                 return -ENOMEM;
1210
1211         config = tegra_phy->config;
1212
1213         err = read_utmi_param(pdev, "nvidia,hssync-start-delay",
1214                               &config->hssync_start_delay);
1215         if (err)
1216                 return err;
1217
1218         err = read_utmi_param(pdev, "nvidia,elastic-limit",
1219                               &config->elastic_limit);
1220         if (err)
1221                 return err;
1222
1223         err = read_utmi_param(pdev, "nvidia,idle-wait-delay",
1224                               &config->idle_wait_delay);
1225         if (err)
1226                 return err;
1227
1228         err = read_utmi_param(pdev, "nvidia,term-range-adj",
1229                               &config->term_range_adj);
1230         if (err)
1231                 return err;
1232
1233         err = read_utmi_param(pdev, "nvidia,xcvr-lsfslew",
1234                               &config->xcvr_lsfslew);
1235         if (err)
1236                 return err;
1237
1238         err = read_utmi_param(pdev, "nvidia,xcvr-lsrslew",
1239                               &config->xcvr_lsrslew);
1240         if (err)
1241                 return err;
1242
1243         if (tegra_phy->soc_config->requires_extra_tuning_parameters) {
1244                 err = read_utmi_param(pdev, "nvidia,xcvr-hsslew",
1245                                       &config->xcvr_hsslew);
1246                 if (err)
1247                         return err;
1248
1249                 err = read_utmi_param(pdev, "nvidia,hssquelch-level",
1250                                       &config->hssquelch_level);
1251                 if (err)
1252                         return err;
1253
1254                 err = read_utmi_param(pdev, "nvidia,hsdiscon-level",
1255                                       &config->hsdiscon_level);
1256                 if (err)
1257                         return err;
1258         }
1259
1260         config->xcvr_setup_use_fuses = of_property_read_bool(
1261                 pdev->dev.of_node, "nvidia,xcvr-setup-use-fuses");
1262
1263         if (!config->xcvr_setup_use_fuses) {
1264                 err = read_utmi_param(pdev, "nvidia,xcvr-setup",
1265                                       &config->xcvr_setup);
1266                 if (err)
1267                         return err;
1268         }
1269
1270         return 0;
1271 }
1272
1273 static void tegra_usb_phy_put_pmc_device(void *dev)
1274 {
1275         put_device(dev);
1276 }
1277
1278 static int tegra_usb_phy_parse_pmc(struct device *dev,
1279                                    struct tegra_usb_phy *phy)
1280 {
1281         struct platform_device *pmc_pdev;
1282         struct of_phandle_args args;
1283         int err;
1284
1285         err = of_parse_phandle_with_fixed_args(dev->of_node, "nvidia,pmc",
1286                                                1, 0, &args);
1287         if (err) {
1288                 if (err != -ENOENT)
1289                         return err;
1290
1291                 dev_warn_once(dev, "nvidia,pmc is missing, please update your device-tree\n");
1292                 return 0;
1293         }
1294
1295         pmc_pdev = of_find_device_by_node(args.np);
1296         of_node_put(args.np);
1297         if (!pmc_pdev)
1298                 return -ENODEV;
1299
1300         err = devm_add_action_or_reset(dev, tegra_usb_phy_put_pmc_device,
1301                                        &pmc_pdev->dev);
1302         if (err)
1303                 return err;
1304
1305         if (!platform_get_drvdata(pmc_pdev))
1306                 return -EPROBE_DEFER;
1307
1308         phy->pmc_regmap = dev_get_regmap(&pmc_pdev->dev, "usb_sleepwalk");
1309         if (!phy->pmc_regmap)
1310                 return -EINVAL;
1311
1312         phy->instance = args.args[0];
1313
1314         return 0;
1315 }
1316
1317 static const struct tegra_phy_soc_config tegra20_soc_config = {
1318         .utmi_pll_config_in_car_module = false,
1319         .has_hostpc = false,
1320         .requires_usbmode_setup = false,
1321         .requires_extra_tuning_parameters = false,
1322         .requires_pmc_ao_power_up = false,
1323 };
1324
1325 static const struct tegra_phy_soc_config tegra30_soc_config = {
1326         .utmi_pll_config_in_car_module = true,
1327         .has_hostpc = true,
1328         .requires_usbmode_setup = true,
1329         .requires_extra_tuning_parameters = true,
1330         .requires_pmc_ao_power_up = true,
1331 };
1332
1333 static const struct of_device_id tegra_usb_phy_id_table[] = {
1334         { .compatible = "nvidia,tegra30-usb-phy", .data = &tegra30_soc_config },
1335         { .compatible = "nvidia,tegra20-usb-phy", .data = &tegra20_soc_config },
1336         { },
1337 };
1338 MODULE_DEVICE_TABLE(of, tegra_usb_phy_id_table);
1339
1340 static int tegra_usb_phy_probe(struct platform_device *pdev)
1341 {
1342         struct device_node *np = pdev->dev.of_node;
1343         struct tegra_usb_phy *tegra_phy;
1344         enum usb_phy_interface phy_type;
1345         struct reset_control *reset;
1346         struct gpio_desc *gpiod;
1347         struct resource *res;
1348         struct usb_phy *phy;
1349         int err;
1350
1351         tegra_phy = devm_kzalloc(&pdev->dev, sizeof(*tegra_phy), GFP_KERNEL);
1352         if (!tegra_phy)
1353                 return -ENOMEM;
1354
1355         tegra_phy->soc_config = of_device_get_match_data(&pdev->dev);
1356         tegra_phy->irq = platform_get_irq_optional(pdev, 0);
1357
1358         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1359         if (!res) {
1360                 dev_err(&pdev->dev, "Failed to get I/O memory\n");
1361                 return  -ENXIO;
1362         }
1363
1364         /*
1365          * Note that PHY and USB controller are using shared registers,
1366          * therefore devm_platform_ioremap_resource() can't be used here.
1367          */
1368         tegra_phy->regs = devm_ioremap(&pdev->dev, res->start,
1369                                        resource_size(res));
1370         if (!tegra_phy->regs) {
1371                 dev_err(&pdev->dev, "Failed to remap I/O memory\n");
1372                 return -ENOMEM;
1373         }
1374
1375         tegra_phy->is_legacy_phy =
1376                 of_property_read_bool(np, "nvidia,has-legacy-mode");
1377
1378         if (of_find_property(np, "dr_mode", NULL))
1379                 tegra_phy->mode = usb_get_dr_mode(&pdev->dev);
1380         else
1381                 tegra_phy->mode = USB_DR_MODE_HOST;
1382
1383         if (tegra_phy->mode == USB_DR_MODE_UNKNOWN) {
1384                 dev_err(&pdev->dev, "dr_mode is invalid\n");
1385                 return -EINVAL;
1386         }
1387
1388         /* On some boards, the VBUS regulator doesn't need to be controlled */
1389         tegra_phy->vbus = devm_regulator_get(&pdev->dev, "vbus");
1390         if (IS_ERR(tegra_phy->vbus))
1391                 return PTR_ERR(tegra_phy->vbus);
1392
1393         tegra_phy->pll_u = devm_clk_get(&pdev->dev, "pll_u");
1394         err = PTR_ERR_OR_ZERO(tegra_phy->pll_u);
1395         if (err) {
1396                 dev_err(&pdev->dev, "Failed to get pll_u clock: %d\n", err);
1397                 return err;
1398         }
1399
1400         err = tegra_usb_phy_parse_pmc(&pdev->dev, tegra_phy);
1401         if (err) {
1402                 dev_err_probe(&pdev->dev, err, "Failed to get PMC regmap\n");
1403                 return err;
1404         }
1405
1406         phy_type = of_usb_get_phy_mode(np);
1407         switch (phy_type) {
1408         case USBPHY_INTERFACE_MODE_UTMI:
1409                 err = utmi_phy_probe(tegra_phy, pdev);
1410                 if (err)
1411                         return err;
1412
1413                 tegra_phy->pad_clk = devm_clk_get(&pdev->dev, "utmi-pads");
1414                 err = PTR_ERR_OR_ZERO(tegra_phy->pad_clk);
1415                 if (err) {
1416                         dev_err(&pdev->dev,
1417                                 "Failed to get UTMIP pad clock: %d\n", err);
1418                         return err;
1419                 }
1420
1421                 reset = devm_reset_control_get_optional_shared(&pdev->dev,
1422                                                                "utmi-pads");
1423                 err = PTR_ERR_OR_ZERO(reset);
1424                 if (err) {
1425                         dev_err(&pdev->dev,
1426                                 "Failed to get UTMI-pads reset: %d\n", err);
1427                         return err;
1428                 }
1429                 tegra_phy->pad_rst = reset;
1430                 break;
1431
1432         case USBPHY_INTERFACE_MODE_ULPI:
1433                 tegra_phy->is_ulpi_phy = true;
1434
1435                 tegra_phy->clk = devm_clk_get(&pdev->dev, "ulpi-link");
1436                 err = PTR_ERR_OR_ZERO(tegra_phy->clk);
1437                 if (err) {
1438                         dev_err(&pdev->dev,
1439                                 "Failed to get ULPI clock: %d\n", err);
1440                         return err;
1441                 }
1442
1443                 gpiod = devm_gpiod_get_from_of_node(&pdev->dev, np,
1444                                                     "nvidia,phy-reset-gpio",
1445                                                     0, GPIOD_OUT_HIGH,
1446                                                     "ulpi_phy_reset_b");
1447                 err = PTR_ERR_OR_ZERO(gpiod);
1448                 if (err) {
1449                         dev_err(&pdev->dev,
1450                                 "Request failed for reset GPIO: %d\n", err);
1451                         return err;
1452                 }
1453                 tegra_phy->reset_gpio = gpiod;
1454
1455                 phy = devm_otg_ulpi_create(&pdev->dev,
1456                                            &ulpi_viewport_access_ops, 0);
1457                 if (!phy) {
1458                         dev_err(&pdev->dev, "Failed to create ULPI OTG\n");
1459                         return -ENOMEM;
1460                 }
1461
1462                 tegra_phy->ulpi = phy;
1463                 tegra_phy->ulpi->io_priv = tegra_phy->regs + ULPI_VIEWPORT;
1464                 break;
1465
1466         default:
1467                 dev_err(&pdev->dev, "phy_type %u is invalid or unsupported\n",
1468                         phy_type);
1469                 return -EINVAL;
1470         }
1471
1472         tegra_phy->u_phy.dev = &pdev->dev;
1473         tegra_phy->u_phy.init = tegra_usb_phy_init;
1474         tegra_phy->u_phy.shutdown = tegra_usb_phy_shutdown;
1475         tegra_phy->u_phy.set_wakeup = tegra_usb_phy_set_wakeup;
1476         tegra_phy->u_phy.set_suspend = tegra_usb_phy_set_suspend;
1477
1478         platform_set_drvdata(pdev, tegra_phy);
1479
1480         return usb_add_phy_dev(&tegra_phy->u_phy);
1481 }
1482
1483 static int tegra_usb_phy_remove(struct platform_device *pdev)
1484 {
1485         struct tegra_usb_phy *tegra_phy = platform_get_drvdata(pdev);
1486
1487         usb_remove_phy(&tegra_phy->u_phy);
1488
1489         return 0;
1490 }
1491
1492 static struct platform_driver tegra_usb_phy_driver = {
1493         .probe          = tegra_usb_phy_probe,
1494         .remove         = tegra_usb_phy_remove,
1495         .driver         = {
1496                 .name   = "tegra-phy",
1497                 .of_match_table = tegra_usb_phy_id_table,
1498         },
1499 };
1500 module_platform_driver(tegra_usb_phy_driver);
1501
1502 MODULE_DESCRIPTION("Tegra USB PHY driver");
1503 MODULE_LICENSE("GPL v2");