drivers/phy/phy-sun4i-usb.c

   1 /*
   2  * Allwinner sun4i USB phy driver
   3  *
   4  * Copyright (C) 2014-2015 Hans de Goede <hdegoede@redhat.com>
   5  *
   6  * Based on code from
   7  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   8  *
   9  * Modelled after: Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver
  10  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
  11  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  */
  23
  24 #include <linux/clk.h>
  25 #include <linux/delay.h>
  26 #include <linux/err.h>
  27 #include <linux/extcon.h>
  28 #include <linux/io.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/mutex.h>
  33 #include <linux/of.h>
  34 #include <linux/of_address.h>
  35 #include <linux/of_device.h>
  36 #include <linux/of_gpio.h>
  37 #include <linux/phy/phy.h>
  38 #include <linux/phy/phy-sun4i-usb.h>
  39 #include <linux/platform_device.h>
  40 #include <linux/power_supply.h>
  41 #include <linux/regulator/consumer.h>
  42 #include <linux/reset.h>
  43 #include <linux/spinlock.h>
  44 #include <linux/usb/of.h>
  45 #include <linux/workqueue.h>
  46
  47 #define REG_ISCR                        0x00
  48 #define REG_PHYCTL_A10                  0x04
  49 #define REG_PHYBIST                     0x08
  50 #define REG_PHYTUNE                     0x0c
  51 #define REG_PHYCTL_A33                  0x10
  52 #define REG_PHY_UNK_H3                  0x20
  53
  54 #define REG_PMU_UNK1                    0x10
  55
  56 #define PHYCTL_DATA                     BIT(7)
  57
  58 #define SUNXI_AHB_ICHR8_EN              BIT(10)
  59 #define SUNXI_AHB_INCR4_BURST_EN        BIT(9)
  60 #define SUNXI_AHB_INCRX_ALIGN_EN        BIT(8)
  61 #define SUNXI_ULPI_BYPASS_EN            BIT(0)
  62
  63 /* ISCR, Interface Status and Control bits */
  64 #define ISCR_ID_PULLUP_EN               (1 << 17)
  65 #define ISCR_DPDM_PULLUP_EN     (1 << 16)
  66 /* sunxi has the phy id/vbus pins not connected, so we use the force bits */
  67 #define ISCR_FORCE_ID_MASK      (3 << 14)
  68 #define ISCR_FORCE_ID_LOW               (2 << 14)
  69 #define ISCR_FORCE_ID_HIGH      (3 << 14)
  70 #define ISCR_FORCE_VBUS_MASK    (3 << 12)
  71 #define ISCR_FORCE_VBUS_LOW     (2 << 12)
  72 #define ISCR_FORCE_VBUS_HIGH    (3 << 12)
  73
  74 /* Common Control Bits for Both PHYs */
  75 #define PHY_PLL_BW                      0x03
  76 #define PHY_RES45_CAL_EN                0x0c
  77
  78 /* Private Control Bits for Each PHY */
  79 #define PHY_TX_AMPLITUDE_TUNE           0x20
  80 #define PHY_TX_SLEWRATE_TUNE            0x22
  81 #define PHY_VBUSVALID_TH_SEL            0x25
  82 #define PHY_PULLUP_RES_SEL              0x27
  83 #define PHY_OTG_FUNC_EN                 0x28
  84 #define PHY_VBUS_DET_EN                 0x29
  85 #define PHY_DISCON_TH_SEL               0x2a
  86 #define PHY_SQUELCH_DETECT              0x3c
  87
  88 #define MAX_PHYS                        4
  89
  90 /*
  91  * Note do not raise the debounce time, we must report Vusb high within 100ms
  92  * otherwise we get Vbus errors
  93  */
  94 #define DEBOUNCE_TIME                   msecs_to_jiffies(50)
  95 #define POLL_TIME                       msecs_to_jiffies(250)
  96
  97 enum sun4i_usb_phy_type {
  98         sun4i_a10_phy,
  99         sun6i_a31_phy,
 100         sun8i_a33_phy,
 101         sun8i_h3_phy,
 102         sun8i_v3s_phy,
 103         sun50i_a64_phy,
 104 };
 105
 106 struct sun4i_usb_phy_cfg {
 107         int num_phys;
 108         enum sun4i_usb_phy_type type;
 109         u32 disc_thresh;
 110         u8 phyctl_offset;
 111         bool dedicated_clocks;
 112         bool enable_pmu_unk1;
 113 };
 114
 115 struct sun4i_usb_phy_data {
 116         void __iomem *base;
 117         const struct sun4i_usb_phy_cfg *cfg;
 118         enum usb_dr_mode dr_mode;
 119         spinlock_t reg_lock; /* guard access to phyctl reg */
 120         struct sun4i_usb_phy {
 121                 struct phy *phy;
 122                 void __iomem *pmu;
 123                 struct regulator *vbus;
 124                 struct reset_control *reset;
 125                 struct clk *clk;
 126                 bool regulator_on;
 127                 int index;
 128         } phys[MAX_PHYS];
 129         /* phy0 / otg related variables */
 130         struct extcon_dev *extcon;
 131         bool phy0_init;
 132         struct gpio_desc *id_det_gpio;
 133         struct gpio_desc *vbus_det_gpio;
 134         struct power_supply *vbus_power_supply;
 135         struct notifier_block vbus_power_nb;
 136         bool vbus_power_nb_registered;
 137         bool force_session_end;
 138         int id_det_irq;
 139         int vbus_det_irq;
 140         int id_det;
 141         int vbus_det;
 142         struct delayed_work detect;
 143 };
 144
 145 #define to_sun4i_usb_phy_data(phy) \
 146         container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
 147
 148 static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
 149 {
 150         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 151         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 152         u32 iscr;
 153
 154         iscr = readl(data->base + REG_ISCR);
 155         iscr &= ~clr;
 156         iscr |= set;
 157         writel(iscr, data->base + REG_ISCR);
 158 }
 159
 160 static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
 161 {
 162         if (val)
 163                 val = ISCR_FORCE_ID_HIGH;
 164         else
 165                 val = ISCR_FORCE_ID_LOW;
 166
 167         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
 168 }
 169
 170 static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
 171 {
 172         if (val)
 173                 val = ISCR_FORCE_VBUS_HIGH;
 174         else
 175                 val = ISCR_FORCE_VBUS_LOW;
 176
 177         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
 178 }
 179
 180 static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
 181                                 int len)
 182 {
 183         struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
 184         u32 temp, usbc_bit = BIT(phy->index * 2);
 185         void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
 186         unsigned long flags;
 187         int i;
 188
 189         spin_lock_irqsave(&phy_data->reg_lock, flags);
 190
 191         if (phy_data->cfg->type == sun8i_a33_phy ||
 192             phy_data->cfg->type == sun50i_a64_phy ||
 193             phy_data->cfg->type == sun8i_v3s_phy) {
 194                 /* A33 or A64 needs us to set phyctl to 0 explicitly */
 195                 writel(0, phyctl);
 196         }
 197
 198         for (i = 0; i < len; i++) {
 199                 temp = readl(phyctl);
 200
 201                 /* clear the address portion */
 202                 temp &= ~(0xff << 8);
 203
 204                 /* set the address */
 205                 temp |= ((addr + i) << 8);
 206                 writel(temp, phyctl);
 207
 208                 /* set the data bit and clear usbc bit*/
 209                 temp = readb(phyctl);
 210                 if (data & 0x1)
 211                         temp |= PHYCTL_DATA;
 212                 else
 213                         temp &= ~PHYCTL_DATA;
 214                 temp &= ~usbc_bit;
 215                 writeb(temp, phyctl);
 216
 217                 /* pulse usbc_bit */
 218                 temp = readb(phyctl);
 219                 temp |= usbc_bit;
 220                 writeb(temp, phyctl);
 221
 222                 temp = readb(phyctl);
 223                 temp &= ~usbc_bit;
 224                 writeb(temp, phyctl);
 225
 226                 data >>= 1;
 227         }
 228
 229         spin_unlock_irqrestore(&phy_data->reg_lock, flags);
 230 }
 231
 232 static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
 233 {
 234         u32 bits, reg_value;
 235
 236         if (!phy->pmu)
 237                 return;
 238
 239         bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
 240                 SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
 241
 242         reg_value = readl(phy->pmu);
 243
 244         if (enable)
 245                 reg_value |= bits;
 246         else
 247                 reg_value &= ~bits;
 248
 249         writel(reg_value, phy->pmu);
 250 }
 251
 252 static int sun4i_usb_phy_init(struct phy *_phy)
 253 {
 254         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 255         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 256         int ret;
 257         u32 val;
 258
 259         ret = clk_prepare_enable(phy->clk);
 260         if (ret)
 261                 return ret;
 262
 263         ret = reset_control_deassert(phy->reset);
 264         if (ret) {
 265                 clk_disable_unprepare(phy->clk);
 266                 return ret;
 267         }
 268
 269         if (phy->pmu && data->cfg->enable_pmu_unk1) {
 270                 val = readl(phy->pmu + REG_PMU_UNK1);
 271                 writel(val & ~2, phy->pmu + REG_PMU_UNK1);
 272         }
 273
 274         if (data->cfg->type == sun8i_h3_phy) {
 275                 if (phy->index == 0) {
 276                         val = readl(data->base + REG_PHY_UNK_H3);
 277                         writel(val & ~1, data->base + REG_PHY_UNK_H3);
 278                 }
 279         } else {
 280                 /* Enable USB 45 Ohm resistor calibration */
 281                 if (phy->index == 0)
 282                         sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
 283
 284                 /* Adjust PHY's magnitude and rate */
 285                 sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
 286
 287                 /* Disconnect threshold adjustment */
 288                 sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
 289                                     data->cfg->disc_thresh, 2);
 290         }
 291
 292         sun4i_usb_phy_passby(phy, 1);
 293
 294         if (phy->index == 0) {
 295                 data->phy0_init = true;
 296
 297                 /* Enable pull-ups */
 298                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
 299                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
 300
 301                 /* Force ISCR and cable state updates */
 302                 data->id_det = -1;
 303                 data->vbus_det = -1;
 304                 queue_delayed_work(system_wq, &data->detect, 0);
 305         }
 306
 307         return 0;
 308 }
 309
 310 static int sun4i_usb_phy_exit(struct phy *_phy)
 311 {
 312         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 313         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 314
 315         if (phy->index == 0) {
 316                 /* Disable pull-ups */
 317                 sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
 318                 sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
 319                 data->phy0_init = false;
 320         }
 321
 322         sun4i_usb_phy_passby(phy, 0);
 323         reset_control_assert(phy->reset);
 324         clk_disable_unprepare(phy->clk);
 325
 326         return 0;
 327 }
 328
 329 static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data)
 330 {
 331         switch (data->dr_mode) {
 332         case USB_DR_MODE_OTG:
 333                 if (data->id_det_gpio)
 334                         return gpiod_get_value_cansleep(data->id_det_gpio);
 335                 else
 336                         return 1; /* Fallback to peripheral mode */
 337         case USB_DR_MODE_HOST:
 338                 return 0;
 339         case USB_DR_MODE_PERIPHERAL:
 340         default:
 341                 return 1;
 342         }
 343 }
 344
 345 static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
 346 {
 347         if (data->vbus_det_gpio)
 348                 return gpiod_get_value_cansleep(data->vbus_det_gpio);
 349
 350         if (data->vbus_power_supply) {
 351                 union power_supply_propval val;
 352                 int r;
 353
 354                 r = power_supply_get_property(data->vbus_power_supply,
 355                                               POWER_SUPPLY_PROP_PRESENT, &val);
 356                 if (r == 0)
 357                         return val.intval;
 358         }
 359
 360         /* Fallback: report vbus as high */
 361         return 1;
 362 }
 363
 364 static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
 365 {
 366         return data->vbus_det_gpio || data->vbus_power_supply;
 367 }
 368
 369 static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data)
 370 {
 371         if ((data->id_det_gpio && data->id_det_irq <= 0) ||
 372             (data->vbus_det_gpio && data->vbus_det_irq <= 0))
 373                 return true;
 374
 375         /*
 376          * The A31 companion pmic (axp221) does not generate vbus change
 377          * interrupts when the board is driving vbus, so we must poll
 378          * when using the pmic for vbus-det _and_ we're driving vbus.
 379          */
 380         if (data->cfg->type == sun6i_a31_phy &&
 381             data->vbus_power_supply && data->phys[0].regulator_on)
 382                 return true;
 383
 384         return false;
 385 }
 386
 387 static int sun4i_usb_phy_power_on(struct phy *_phy)
 388 {
 389         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 390         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 391         int ret;
 392
 393         if (!phy->vbus || phy->regulator_on)
 394                 return 0;
 395
 396         /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
 397         if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
 398                                 data->vbus_det) {
 399                 dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n");
 400                 return 0;
 401         }
 402
 403         ret = regulator_enable(phy->vbus);
 404         if (ret)
 405                 return ret;
 406
 407         phy->regulator_on = true;
 408
 409         /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
 410         if (phy->index == 0 && sun4i_usb_phy0_poll(data))
 411                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 412
 413         return 0;
 414 }
 415
 416 static int sun4i_usb_phy_power_off(struct phy *_phy)
 417 {
 418         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 419         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 420
 421         if (!phy->vbus || !phy->regulator_on)
 422                 return 0;
 423
 424         regulator_disable(phy->vbus);
 425         phy->regulator_on = false;
 426
 427         /*
 428          * phy0 vbus typically slowly discharges, sometimes this causes the
 429          * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
 430          */
 431         if (phy->index == 0 && !sun4i_usb_phy0_poll(data))
 432                 mod_delayed_work(system_wq, &data->detect, POLL_TIME);
 433
 434         return 0;
 435 }
 436
 437 static int sun4i_usb_phy_set_mode(struct phy *_phy, enum phy_mode mode)
 438 {
 439         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 440         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 441         int new_mode;
 442
 443         if (phy->index != 0)
 444                 return -EINVAL;
 445
 446         switch (mode) {
 447         case PHY_MODE_USB_HOST:
 448                 new_mode = USB_DR_MODE_HOST;
 449                 break;
 450         case PHY_MODE_USB_DEVICE:
 451                 new_mode = USB_DR_MODE_PERIPHERAL;
 452                 break;
 453         case PHY_MODE_USB_OTG:
 454                 new_mode = USB_DR_MODE_OTG;
 455                 break;
 456         default:
 457                 return -EINVAL;
 458         }
 459
 460         if (new_mode != data->dr_mode) {
 461                 dev_info(&_phy->dev, "Changing dr_mode to %d\n", new_mode);
 462                 data->dr_mode = new_mode;
 463         }
 464
 465         data->id_det = -1; /* Force reprocessing of id */
 466         data->force_session_end = true;
 467         queue_delayed_work(system_wq, &data->detect, 0);
 468
 469         return 0;
 470 }
 471
 472 void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
 473 {
 474         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 475
 476         sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
 477 }
 478 EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
 479
 480 static const struct phy_ops sun4i_usb_phy_ops = {
 481         .init           = sun4i_usb_phy_init,
 482         .exit           = sun4i_usb_phy_exit,
 483         .power_on       = sun4i_usb_phy_power_on,
 484         .power_off      = sun4i_usb_phy_power_off,
 485         .set_mode       = sun4i_usb_phy_set_mode,
 486         .owner          = THIS_MODULE,
 487 };
 488
 489 static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
 490 {
 491         struct sun4i_usb_phy_data *data =
 492                 container_of(work, struct sun4i_usb_phy_data, detect.work);
 493         struct phy *phy0 = data->phys[0].phy;
 494         bool force_session_end, id_notify = false, vbus_notify = false;
 495         int id_det, vbus_det;
 496
 497         if (phy0 == NULL)
 498                 return;
 499
 500         id_det = sun4i_usb_phy0_get_id_det(data);
 501         vbus_det = sun4i_usb_phy0_get_vbus_det(data);
 502
 503         mutex_lock(&phy0->mutex);
 504
 505         if (!data->phy0_init) {
 506                 mutex_unlock(&phy0->mutex);
 507                 return;
 508         }
 509
 510         force_session_end = data->force_session_end;
 511         data->force_session_end = false;
 512
 513         if (id_det != data->id_det) {
 514                 /* id-change, force session end if we've no vbus detection */
 515                 if (data->dr_mode == USB_DR_MODE_OTG &&
 516                     !sun4i_usb_phy0_have_vbus_det(data))
 517                         force_session_end = true;
 518
 519                 /* When entering host mode (id = 0) force end the session now */
 520                 if (force_session_end && id_det == 0) {
 521                         sun4i_usb_phy0_set_vbus_detect(phy0, 0);
 522                         msleep(200);
 523                         sun4i_usb_phy0_set_vbus_detect(phy0, 1);
 524                 }
 525                 sun4i_usb_phy0_set_id_detect(phy0, id_det);
 526                 data->id_det = id_det;
 527                 id_notify = true;
 528         }
 529
 530         if (vbus_det != data->vbus_det) {
 531                 sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
 532                 data->vbus_det = vbus_det;
 533                 vbus_notify = true;
 534         }
 535
 536         mutex_unlock(&phy0->mutex);
 537
 538         if (id_notify) {
 539                 extcon_set_state_sync(data->extcon, EXTCON_USB_HOST,
 540                                         !id_det);
 541                 /* When leaving host mode force end the session here */
 542                 if (force_session_end && id_det == 1) {
 543                         mutex_lock(&phy0->mutex);
 544                         sun4i_usb_phy0_set_vbus_detect(phy0, 0);
 545                         msleep(1000);
 546                         sun4i_usb_phy0_set_vbus_detect(phy0, 1);
 547                         mutex_unlock(&phy0->mutex);
 548                 }
 549         }
 550
 551         if (vbus_notify)
 552                 extcon_set_state_sync(data->extcon, EXTCON_USB, vbus_det);
 553
 554         if (sun4i_usb_phy0_poll(data))
 555                 queue_delayed_work(system_wq, &data->detect, POLL_TIME);
 556 }
 557
 558 static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
 559 {
 560         struct sun4i_usb_phy_data *data = dev_id;
 561
 562         /* vbus or id changed, let the pins settle and then scan them */
 563         mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 564
 565         return IRQ_HANDLED;
 566 }
 567
 568 static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
 569                                       unsigned long val, void *v)
 570 {
 571         struct sun4i_usb_phy_data *data =
 572                 container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
 573         struct power_supply *psy = v;
 574
 575         /* Properties on the vbus_power_supply changed, scan vbus_det */
 576         if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
 577                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 578
 579         return NOTIFY_OK;
 580 }
 581
 582 static struct phy *sun4i_usb_phy_xlate(struct device *dev,
 583                                         struct of_phandle_args *args)
 584 {
 585         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 586
 587         if (args->args[0] >= data->cfg->num_phys)
 588                 return ERR_PTR(-ENODEV);
 589
 590         return data->phys[args->args[0]].phy;
 591 }
 592
 593 static int sun4i_usb_phy_remove(struct platform_device *pdev)
 594 {
 595         struct device *dev = &pdev->dev;
 596         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 597
 598         if (data->vbus_power_nb_registered)
 599                 power_supply_unreg_notifier(&data->vbus_power_nb);
 600         if (data->id_det_irq > 0)
 601                 devm_free_irq(dev, data->id_det_irq, data);
 602         if (data->vbus_det_irq > 0)
 603                 devm_free_irq(dev, data->vbus_det_irq, data);
 604
 605         cancel_delayed_work_sync(&data->detect);
 606
 607         return 0;
 608 }
 609
 610 static const unsigned int sun4i_usb_phy0_cable[] = {
 611         EXTCON_USB,
 612         EXTCON_USB_HOST,
 613         EXTCON_NONE,
 614 };
 615
 616 static int sun4i_usb_phy_probe(struct platform_device *pdev)
 617 {
 618         struct sun4i_usb_phy_data *data;
 619         struct device *dev = &pdev->dev;
 620         struct device_node *np = dev->of_node;
 621         struct phy_provider *phy_provider;
 622         struct resource *res;
 623         int i, ret;
 624
 625         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 626         if (!data)
 627                 return -ENOMEM;
 628
 629         spin_lock_init(&data->reg_lock);
 630         INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
 631         dev_set_drvdata(dev, data);
 632         data->cfg = of_device_get_match_data(dev);
 633         if (!data->cfg)
 634                 return -EINVAL;
 635
 636         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
 637         data->base = devm_ioremap_resource(dev, res);
 638         if (IS_ERR(data->base))
 639                 return PTR_ERR(data->base);
 640
 641         data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
 642                                                     GPIOD_IN);
 643         if (IS_ERR(data->id_det_gpio))
 644                 return PTR_ERR(data->id_det_gpio);
 645
 646         data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det",
 647                                                       GPIOD_IN);
 648         if (IS_ERR(data->vbus_det_gpio))
 649                 return PTR_ERR(data->vbus_det_gpio);
 650
 651         if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
 652                 data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
 653                                                      "usb0_vbus_power-supply");
 654                 if (IS_ERR(data->vbus_power_supply))
 655                         return PTR_ERR(data->vbus_power_supply);
 656
 657                 if (!data->vbus_power_supply)
 658                         return -EPROBE_DEFER;
 659         }
 660
 661         data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0);
 662
 663         data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable);
 664         if (IS_ERR(data->extcon))
 665                 return PTR_ERR(data->extcon);
 666
 667         ret = devm_extcon_dev_register(dev, data->extcon);
 668         if (ret) {
 669                 dev_err(dev, "failed to register extcon: %d\n", ret);
 670                 return ret;
 671         }
 672
 673         for (i = 0; i < data->cfg->num_phys; i++) {
 674                 struct sun4i_usb_phy *phy = data->phys + i;
 675                 char name[16];
 676
 677                 snprintf(name, sizeof(name), "usb%d_vbus", i);
 678                 phy->vbus = devm_regulator_get_optional(dev, name);
 679                 if (IS_ERR(phy->vbus)) {
 680                         if (PTR_ERR(phy->vbus) == -EPROBE_DEFER)
 681                                 return -EPROBE_DEFER;
 682                         phy->vbus = NULL;
 683                 }
 684
 685                 if (data->cfg->dedicated_clocks)
 686                         snprintf(name, sizeof(name), "usb%d_phy", i);
 687                 else
 688                         strlcpy(name, "usb_phy", sizeof(name));
 689
 690                 phy->clk = devm_clk_get(dev, name);
 691                 if (IS_ERR(phy->clk)) {
 692                         dev_err(dev, "failed to get clock %s\n", name);
 693                         return PTR_ERR(phy->clk);
 694                 }
 695
 696                 snprintf(name, sizeof(name), "usb%d_reset", i);
 697                 phy->reset = devm_reset_control_get(dev, name);
 698                 if (IS_ERR(phy->reset)) {
 699                         dev_err(dev, "failed to get reset %s\n", name);
 700                         return PTR_ERR(phy->reset);
 701                 }
 702
 703                 if (i) { /* No pmu for usbc0 */
 704                         snprintf(name, sizeof(name), "pmu%d", i);
 705                         res = platform_get_resource_byname(pdev,
 706                                                         IORESOURCE_MEM, name);
 707                         phy->pmu = devm_ioremap_resource(dev, res);
 708                         if (IS_ERR(phy->pmu))
 709                                 return PTR_ERR(phy->pmu);
 710                 }
 711
 712                 phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
 713                 if (IS_ERR(phy->phy)) {
 714                         dev_err(dev, "failed to create PHY %d\n", i);
 715                         return PTR_ERR(phy->phy);
 716                 }
 717
 718                 phy->index = i;
 719                 phy_set_drvdata(phy->phy, &data->phys[i]);
 720         }
 721
 722         data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
 723         if (data->id_det_irq > 0) {
 724                 ret = devm_request_irq(dev, data->id_det_irq,
 725                                 sun4i_usb_phy0_id_vbus_det_irq,
 726                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 727                                 "usb0-id-det", data);
 728                 if (ret) {
 729                         dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
 730                         return ret;
 731                 }
 732         }
 733
 734         data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
 735         if (data->vbus_det_irq > 0) {
 736                 ret = devm_request_irq(dev, data->vbus_det_irq,
 737                                 sun4i_usb_phy0_id_vbus_det_irq,
 738                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 739                                 "usb0-vbus-det", data);
 740                 if (ret) {
 741                         dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
 742                         data->vbus_det_irq = -1;
 743                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 744                         return ret;
 745                 }
 746         }
 747
 748         if (data->vbus_power_supply) {
 749                 data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
 750                 data->vbus_power_nb.priority = 0;
 751                 ret = power_supply_reg_notifier(&data->vbus_power_nb);
 752                 if (ret) {
 753                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 754                         return ret;
 755                 }
 756                 data->vbus_power_nb_registered = true;
 757         }
 758
 759         phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
 760         if (IS_ERR(phy_provider)) {
 761                 sun4i_usb_phy_remove(pdev); /* Stop detect work */
 762                 return PTR_ERR(phy_provider);
 763         }
 764
 765         return 0;
 766 }
 767
 768 static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
 769         .num_phys = 3,
 770         .type = sun4i_a10_phy,
 771         .disc_thresh = 3,
 772         .phyctl_offset = REG_PHYCTL_A10,
 773         .dedicated_clocks = false,
 774         .enable_pmu_unk1 = false,
 775 };
 776
 777 static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {
 778         .num_phys = 2,
 779         .type = sun4i_a10_phy,
 780         .disc_thresh = 2,
 781         .phyctl_offset = REG_PHYCTL_A10,
 782         .dedicated_clocks = false,
 783         .enable_pmu_unk1 = false,
 784 };
 785
 786 static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
 787         .num_phys = 3,
 788         .type = sun6i_a31_phy,
 789         .disc_thresh = 3,
 790         .phyctl_offset = REG_PHYCTL_A10,
 791         .dedicated_clocks = true,
 792         .enable_pmu_unk1 = false,
 793 };
 794
 795 static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = {
 796         .num_phys = 3,
 797         .type = sun4i_a10_phy,
 798         .disc_thresh = 2,
 799         .phyctl_offset = REG_PHYCTL_A10,
 800         .dedicated_clocks = false,
 801         .enable_pmu_unk1 = false,
 802 };
 803
 804 static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = {
 805         .num_phys = 2,
 806         .type = sun4i_a10_phy,
 807         .disc_thresh = 3,
 808         .phyctl_offset = REG_PHYCTL_A10,
 809         .dedicated_clocks = true,
 810         .enable_pmu_unk1 = false,
 811 };
 812
 813 static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
 814         .num_phys = 2,
 815         .type = sun8i_a33_phy,
 816         .disc_thresh = 3,
 817         .phyctl_offset = REG_PHYCTL_A33,
 818         .dedicated_clocks = true,
 819         .enable_pmu_unk1 = false,
 820 };
 821
 822 static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
 823         .num_phys = 4,
 824         .type = sun8i_h3_phy,
 825         .disc_thresh = 3,
 826         .dedicated_clocks = true,
 827         .enable_pmu_unk1 = true,
 828 };
 829
 830 static const struct sun4i_usb_phy_cfg sun8i_v3s_cfg = {
 831         .num_phys = 1,
 832         .type = sun8i_v3s_phy,
 833         .disc_thresh = 3,
 834         .phyctl_offset = REG_PHYCTL_A33,
 835         .dedicated_clocks = true,
 836         .enable_pmu_unk1 = true,
 837 };
 838
 839 static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = {
 840         .num_phys = 2,
 841         .type = sun50i_a64_phy,
 842         .disc_thresh = 3,
 843         .phyctl_offset = REG_PHYCTL_A33,
 844         .dedicated_clocks = true,
 845         .enable_pmu_unk1 = true,
 846 };
 847
 848 static const struct of_device_id sun4i_usb_phy_of_match[] = {
 849         { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
 850         { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
 851         { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
 852         { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
 853         { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
 854         { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
 855         { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
 856         { .compatible = "allwinner,sun8i-v3s-usb-phy", .data = &sun8i_v3s_cfg },
 857         { .compatible = "allwinner,sun50i-a64-usb-phy",
 858           .data = &sun50i_a64_cfg},
 859         { },
 860 };
 861 MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
 862
 863 static struct platform_driver sun4i_usb_phy_driver = {
 864         .probe  = sun4i_usb_phy_probe,
 865         .remove = sun4i_usb_phy_remove,
 866         .driver = {
 867                 .of_match_table = sun4i_usb_phy_of_match,
 868                 .name  = "sun4i-usb-phy",
 869         }
 870 };
 871 module_platform_driver(sun4i_usb_phy_driver);
 872
 873 MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
 874 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 875 MODULE_LICENSE("GPL v2");