drivers/phy/allwinner/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-provider.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_OTGCTL                  0x20
  53
  54 #define REG_PMU_UNK1                    0x10
  55
  56 #define PHYCTL_DATA                     BIT(7)
  57
  58 #define OTGCTL_ROUTE_MUSB               BIT(0)
  59
  60 #define SUNXI_AHB_ICHR8_EN              BIT(10)
  61 #define SUNXI_AHB_INCR4_BURST_EN        BIT(9)
  62 #define SUNXI_AHB_INCRX_ALIGN_EN        BIT(8)
  63 #define SUNXI_ULPI_BYPASS_EN            BIT(0)
  64
  65 /* ISCR, Interface Status and Control bits */
  66 #define ISCR_ID_PULLUP_EN               (1 << 17)
  67 #define ISCR_DPDM_PULLUP_EN     (1 << 16)
  68 /* sunxi has the phy id/vbus pins not connected, so we use the force bits */
  69 #define ISCR_FORCE_ID_MASK      (3 << 14)
  70 #define ISCR_FORCE_ID_LOW               (2 << 14)
  71 #define ISCR_FORCE_ID_HIGH      (3 << 14)
  72 #define ISCR_FORCE_VBUS_MASK    (3 << 12)
  73 #define ISCR_FORCE_VBUS_LOW     (2 << 12)
  74 #define ISCR_FORCE_VBUS_HIGH    (3 << 12)
  75
  76 /* Common Control Bits for Both PHYs */
  77 #define PHY_PLL_BW                      0x03
  78 #define PHY_RES45_CAL_EN                0x0c
  79
  80 /* Private Control Bits for Each PHY */
  81 #define PHY_TX_AMPLITUDE_TUNE           0x20
  82 #define PHY_TX_SLEWRATE_TUNE            0x22
  83 #define PHY_VBUSVALID_TH_SEL            0x25
  84 #define PHY_PULLUP_RES_SEL              0x27
  85 #define PHY_OTG_FUNC_EN                 0x28
  86 #define PHY_VBUS_DET_EN                 0x29
  87 #define PHY_DISCON_TH_SEL               0x2a
  88 #define PHY_SQUELCH_DETECT              0x3c
  89
  90 /* A83T specific control bits for PHY0 */
  91 #define PHY_CTL_VBUSVLDEXT              BIT(5)
  92 #define PHY_CTL_SIDDQ                   BIT(3)
  93
  94 /* A83T specific control bits for PHY2 HSIC */
  95 #define SUNXI_EHCI_HS_FORCE             BIT(20)
  96 #define SUNXI_HSIC_CONNECT_DET          BIT(17)
  97 #define SUNXI_HSIC_CONNECT_INT          BIT(16)
  98 #define SUNXI_HSIC                      BIT(1)
  99
 100 #define MAX_PHYS                        4
 101
 102 /*
 103  * Note do not raise the debounce time, we must report Vusb high within 100ms
 104  * otherwise we get Vbus errors
 105  */
 106 #define DEBOUNCE_TIME                   msecs_to_jiffies(50)
 107 #define POLL_TIME                       msecs_to_jiffies(250)
 108
 109 enum sun4i_usb_phy_type {
 110         sun4i_a10_phy,
 111         sun6i_a31_phy,
 112         sun8i_a33_phy,
 113         sun8i_a83t_phy,
 114         sun8i_h3_phy,
 115         sun8i_r40_phy,
 116         sun8i_v3s_phy,
 117         sun50i_a64_phy,
 118         sun50i_h6_phy,
 119 };
 120
 121 struct sun4i_usb_phy_cfg {
 122         int num_phys;
 123         int hsic_index;
 124         enum sun4i_usb_phy_type type;
 125         u32 disc_thresh;
 126         u8 phyctl_offset;
 127         bool dedicated_clocks;
 128         bool enable_pmu_unk1;
 129         bool phy0_dual_route;
 130         int missing_phys;
 131 };
 132
 133 struct sun4i_usb_phy_data {
 134         void __iomem *base;
 135         const struct sun4i_usb_phy_cfg *cfg;
 136         enum usb_dr_mode dr_mode;
 137         spinlock_t reg_lock; /* guard access to phyctl reg */
 138         struct sun4i_usb_phy {
 139                 struct phy *phy;
 140                 void __iomem *pmu;
 141                 struct regulator *vbus;
 142                 struct reset_control *reset;
 143                 struct clk *clk;
 144                 struct clk *clk2;
 145                 bool regulator_on;
 146                 int index;
 147         } phys[MAX_PHYS];
 148         /* phy0 / otg related variables */
 149         struct extcon_dev *extcon;
 150         bool phy0_init;
 151         struct gpio_desc *id_det_gpio;
 152         struct gpio_desc *vbus_det_gpio;
 153         struct power_supply *vbus_power_supply;
 154         struct notifier_block vbus_power_nb;
 155         bool vbus_power_nb_registered;
 156         bool force_session_end;
 157         int id_det_irq;
 158         int vbus_det_irq;
 159         int id_det;
 160         int vbus_det;
 161         struct delayed_work detect;
 162 };
 163
 164 #define to_sun4i_usb_phy_data(phy) \
 165         container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
 166
 167 static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
 168 {
 169         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 170         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 171         u32 iscr;
 172
 173         iscr = readl(data->base + REG_ISCR);
 174         iscr &= ~clr;
 175         iscr |= set;
 176         writel(iscr, data->base + REG_ISCR);
 177 }
 178
 179 static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
 180 {
 181         if (val)
 182                 val = ISCR_FORCE_ID_HIGH;
 183         else
 184                 val = ISCR_FORCE_ID_LOW;
 185
 186         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
 187 }
 188
 189 static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
 190 {
 191         if (val)
 192                 val = ISCR_FORCE_VBUS_HIGH;
 193         else
 194                 val = ISCR_FORCE_VBUS_LOW;
 195
 196         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
 197 }
 198
 199 static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
 200                                 int len)
 201 {
 202         struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
 203         u32 temp, usbc_bit = BIT(phy->index * 2);
 204         void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
 205         unsigned long flags;
 206         int i;
 207
 208         spin_lock_irqsave(&phy_data->reg_lock, flags);
 209
 210         if (phy_data->cfg->phyctl_offset == REG_PHYCTL_A33) {
 211                 /* SoCs newer than A33 need us to set phyctl to 0 explicitly */
 212                 writel(0, phyctl);
 213         }
 214
 215         for (i = 0; i < len; i++) {
 216                 temp = readl(phyctl);
 217
 218                 /* clear the address portion */
 219                 temp &= ~(0xff << 8);
 220
 221                 /* set the address */
 222                 temp |= ((addr + i) << 8);
 223                 writel(temp, phyctl);
 224
 225                 /* set the data bit and clear usbc bit*/
 226                 temp = readb(phyctl);
 227                 if (data & 0x1)
 228                         temp |= PHYCTL_DATA;
 229                 else
 230                         temp &= ~PHYCTL_DATA;
 231                 temp &= ~usbc_bit;
 232                 writeb(temp, phyctl);
 233
 234                 /* pulse usbc_bit */
 235                 temp = readb(phyctl);
 236                 temp |= usbc_bit;
 237                 writeb(temp, phyctl);
 238
 239                 temp = readb(phyctl);
 240                 temp &= ~usbc_bit;
 241                 writeb(temp, phyctl);
 242
 243                 data >>= 1;
 244         }
 245
 246         spin_unlock_irqrestore(&phy_data->reg_lock, flags);
 247 }
 248
 249 static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
 250 {
 251         struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
 252         u32 bits, reg_value;
 253
 254         if (!phy->pmu)
 255                 return;
 256
 257         bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
 258                 SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
 259
 260         /* A83T USB2 is HSIC */
 261         if (phy_data->cfg->type == sun8i_a83t_phy && phy->index == 2)
 262                 bits |= SUNXI_EHCI_HS_FORCE | SUNXI_HSIC_CONNECT_INT |
 263                         SUNXI_HSIC;
 264
 265         reg_value = readl(phy->pmu);
 266
 267         if (enable)
 268                 reg_value |= bits;
 269         else
 270                 reg_value &= ~bits;
 271
 272         writel(reg_value, phy->pmu);
 273 }
 274
 275 static int sun4i_usb_phy_init(struct phy *_phy)
 276 {
 277         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 278         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 279         int ret;
 280         u32 val;
 281
 282         ret = clk_prepare_enable(phy->clk);
 283         if (ret)
 284                 return ret;
 285
 286         ret = clk_prepare_enable(phy->clk2);
 287         if (ret) {
 288                 clk_disable_unprepare(phy->clk);
 289                 return ret;
 290         }
 291
 292         ret = reset_control_deassert(phy->reset);
 293         if (ret) {
 294                 clk_disable_unprepare(phy->clk2);
 295                 clk_disable_unprepare(phy->clk);
 296                 return ret;
 297         }
 298
 299         if (data->cfg->type == sun8i_a83t_phy ||
 300             data->cfg->type == sun50i_h6_phy) {
 301                 if (phy->index == 0) {
 302                         val = readl(data->base + data->cfg->phyctl_offset);
 303                         val |= PHY_CTL_VBUSVLDEXT;
 304                         val &= ~PHY_CTL_SIDDQ;
 305                         writel(val, data->base + data->cfg->phyctl_offset);
 306                 }
 307         } else {
 308                 if (phy->pmu && data->cfg->enable_pmu_unk1) {
 309                         val = readl(phy->pmu + REG_PMU_UNK1);
 310                         writel(val & ~2, phy->pmu + REG_PMU_UNK1);
 311                 }
 312
 313                 /* Enable USB 45 Ohm resistor calibration */
 314                 if (phy->index == 0)
 315                         sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
 316
 317                 /* Adjust PHY's magnitude and rate */
 318                 sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
 319
 320                 /* Disconnect threshold adjustment */
 321                 sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
 322                                     data->cfg->disc_thresh, 2);
 323         }
 324
 325         sun4i_usb_phy_passby(phy, 1);
 326
 327         if (phy->index == 0) {
 328                 data->phy0_init = true;
 329
 330                 /* Enable pull-ups */
 331                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
 332                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
 333
 334                 /* Force ISCR and cable state updates */
 335                 data->id_det = -1;
 336                 data->vbus_det = -1;
 337                 queue_delayed_work(system_wq, &data->detect, 0);
 338         }
 339
 340         return 0;
 341 }
 342
 343 static int sun4i_usb_phy_exit(struct phy *_phy)
 344 {
 345         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 346         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 347
 348         if (phy->index == 0) {
 349                 if (data->cfg->type == sun8i_a83t_phy ||
 350                     data->cfg->type == sun50i_h6_phy) {
 351                         void __iomem *phyctl = data->base +
 352                                 data->cfg->phyctl_offset;
 353
 354                         writel(readl(phyctl) | PHY_CTL_SIDDQ, phyctl);
 355                 }
 356
 357                 /* Disable pull-ups */
 358                 sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
 359                 sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
 360                 data->phy0_init = false;
 361         }
 362
 363         sun4i_usb_phy_passby(phy, 0);
 364         reset_control_assert(phy->reset);
 365         clk_disable_unprepare(phy->clk2);
 366         clk_disable_unprepare(phy->clk);
 367
 368         return 0;
 369 }
 370
 371 static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data)
 372 {
 373         switch (data->dr_mode) {
 374         case USB_DR_MODE_OTG:
 375                 if (data->id_det_gpio)
 376                         return gpiod_get_value_cansleep(data->id_det_gpio);
 377                 else
 378                         return 1; /* Fallback to peripheral mode */
 379         case USB_DR_MODE_HOST:
 380                 return 0;
 381         case USB_DR_MODE_PERIPHERAL:
 382         default:
 383                 return 1;
 384         }
 385 }
 386
 387 static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
 388 {
 389         if (data->vbus_det_gpio)
 390                 return gpiod_get_value_cansleep(data->vbus_det_gpio);
 391
 392         if (data->vbus_power_supply) {
 393                 union power_supply_propval val;
 394                 int r;
 395
 396                 r = power_supply_get_property(data->vbus_power_supply,
 397                                               POWER_SUPPLY_PROP_PRESENT, &val);
 398                 if (r == 0)
 399                         return val.intval;
 400         }
 401
 402         /* Fallback: report vbus as high */
 403         return 1;
 404 }
 405
 406 static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
 407 {
 408         return data->vbus_det_gpio || data->vbus_power_supply;
 409 }
 410
 411 static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data)
 412 {
 413         if ((data->id_det_gpio && data->id_det_irq <= 0) ||
 414             (data->vbus_det_gpio && data->vbus_det_irq <= 0))
 415                 return true;
 416
 417         /*
 418          * The A31/A23/A33 companion pmics (AXP221/AXP223) do not
 419          * generate vbus change interrupts when the board is driving
 420          * vbus using the N_VBUSEN pin on the pmic, so we must poll
 421          * when using the pmic for vbus-det _and_ we're driving vbus.
 422          */
 423         if ((data->cfg->type == sun6i_a31_phy ||
 424              data->cfg->type == sun8i_a33_phy) &&
 425             data->vbus_power_supply && data->phys[0].regulator_on)
 426                 return true;
 427
 428         return false;
 429 }
 430
 431 static int sun4i_usb_phy_power_on(struct phy *_phy)
 432 {
 433         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 434         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 435         int ret;
 436
 437         if (!phy->vbus || phy->regulator_on)
 438                 return 0;
 439
 440         /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
 441         if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
 442                                 data->vbus_det) {
 443                 dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n");
 444                 return 0;
 445         }
 446
 447         ret = regulator_enable(phy->vbus);
 448         if (ret)
 449                 return ret;
 450
 451         phy->regulator_on = true;
 452
 453         /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
 454         if (phy->index == 0 && sun4i_usb_phy0_poll(data))
 455                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 456
 457         return 0;
 458 }
 459
 460 static int sun4i_usb_phy_power_off(struct phy *_phy)
 461 {
 462         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 463         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 464
 465         if (!phy->vbus || !phy->regulator_on)
 466                 return 0;
 467
 468         regulator_disable(phy->vbus);
 469         phy->regulator_on = false;
 470
 471         /*
 472          * phy0 vbus typically slowly discharges, sometimes this causes the
 473          * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
 474          */
 475         if (phy->index == 0 && !sun4i_usb_phy0_poll(data))
 476                 mod_delayed_work(system_wq, &data->detect, POLL_TIME);
 477
 478         return 0;
 479 }
 480
 481 static int sun4i_usb_phy_set_mode(struct phy *_phy,
 482                                   enum phy_mode mode, int submode)
 483 {
 484         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 485         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 486         int new_mode;
 487
 488         if (phy->index != 0)
 489                 return -EINVAL;
 490
 491         switch (mode) {
 492         case PHY_MODE_USB_HOST:
 493                 new_mode = USB_DR_MODE_HOST;
 494                 break;
 495         case PHY_MODE_USB_DEVICE:
 496                 new_mode = USB_DR_MODE_PERIPHERAL;
 497                 break;
 498         case PHY_MODE_USB_OTG:
 499                 new_mode = USB_DR_MODE_OTG;
 500                 break;
 501         default:
 502                 return -EINVAL;
 503         }
 504
 505         if (new_mode != data->dr_mode) {
 506                 dev_info(&_phy->dev, "Changing dr_mode to %d\n", new_mode);
 507                 data->dr_mode = new_mode;
 508         }
 509
 510         data->id_det = -1; /* Force reprocessing of id */
 511         data->force_session_end = true;
 512         queue_delayed_work(system_wq, &data->detect, 0);
 513
 514         return 0;
 515 }
 516
 517 void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
 518 {
 519         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 520
 521         sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
 522 }
 523 EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
 524
 525 static const struct phy_ops sun4i_usb_phy_ops = {
 526         .init           = sun4i_usb_phy_init,
 527         .exit           = sun4i_usb_phy_exit,
 528         .power_on       = sun4i_usb_phy_power_on,
 529         .power_off      = sun4i_usb_phy_power_off,
 530         .set_mode       = sun4i_usb_phy_set_mode,
 531         .owner          = THIS_MODULE,
 532 };
 533
 534 static void sun4i_usb_phy0_reroute(struct sun4i_usb_phy_data *data, int id_det)
 535 {
 536         u32 regval;
 537
 538         regval = readl(data->base + REG_PHY_OTGCTL);
 539         if (id_det == 0) {
 540                 /* Host mode. Route phy0 to EHCI/OHCI */
 541                 regval &= ~OTGCTL_ROUTE_MUSB;
 542         } else {
 543                 /* Peripheral mode. Route phy0 to MUSB */
 544                 regval |= OTGCTL_ROUTE_MUSB;
 545         }
 546         writel(regval, data->base + REG_PHY_OTGCTL);
 547 }
 548
 549 static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
 550 {
 551         struct sun4i_usb_phy_data *data =
 552                 container_of(work, struct sun4i_usb_phy_data, detect.work);
 553         struct phy *phy0 = data->phys[0].phy;
 554         bool force_session_end, id_notify = false, vbus_notify = false;
 555         int id_det, vbus_det;
 556
 557         if (phy0 == NULL)
 558                 return;
 559
 560         id_det = sun4i_usb_phy0_get_id_det(data);
 561         vbus_det = sun4i_usb_phy0_get_vbus_det(data);
 562
 563         mutex_lock(&phy0->mutex);
 564
 565         if (!data->phy0_init) {
 566                 mutex_unlock(&phy0->mutex);
 567                 return;
 568         }
 569
 570         force_session_end = data->force_session_end;
 571         data->force_session_end = false;
 572
 573         if (id_det != data->id_det) {
 574                 /* id-change, force session end if we've no vbus detection */
 575                 if (data->dr_mode == USB_DR_MODE_OTG &&
 576                     !sun4i_usb_phy0_have_vbus_det(data))
 577                         force_session_end = true;
 578
 579                 /* When entering host mode (id = 0) force end the session now */
 580                 if (force_session_end && id_det == 0) {
 581                         sun4i_usb_phy0_set_vbus_detect(phy0, 0);
 582                         msleep(200);
 583                         sun4i_usb_phy0_set_vbus_detect(phy0, 1);
 584                 }
 585                 sun4i_usb_phy0_set_id_detect(phy0, id_det);
 586                 data->id_det = id_det;
 587                 id_notify = true;
 588         }
 589
 590         if (vbus_det != data->vbus_det) {
 591                 sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
 592                 data->vbus_det = vbus_det;
 593                 vbus_notify = true;
 594         }
 595
 596         mutex_unlock(&phy0->mutex);
 597
 598         if (id_notify) {
 599                 extcon_set_state_sync(data->extcon, EXTCON_USB_HOST,
 600                                         !id_det);
 601                 /* When leaving host mode force end the session here */
 602                 if (force_session_end && id_det == 1) {
 603                         mutex_lock(&phy0->mutex);
 604                         sun4i_usb_phy0_set_vbus_detect(phy0, 0);
 605                         msleep(1000);
 606                         sun4i_usb_phy0_set_vbus_detect(phy0, 1);
 607                         mutex_unlock(&phy0->mutex);
 608                 }
 609
 610                 /* Re-route PHY0 if necessary */
 611                 if (data->cfg->phy0_dual_route)
 612                         sun4i_usb_phy0_reroute(data, id_det);
 613         }
 614
 615         if (vbus_notify)
 616                 extcon_set_state_sync(data->extcon, EXTCON_USB, vbus_det);
 617
 618         if (sun4i_usb_phy0_poll(data))
 619                 queue_delayed_work(system_wq, &data->detect, POLL_TIME);
 620 }
 621
 622 static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
 623 {
 624         struct sun4i_usb_phy_data *data = dev_id;
 625
 626         /* vbus or id changed, let the pins settle and then scan them */
 627         mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 628
 629         return IRQ_HANDLED;
 630 }
 631
 632 static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
 633                                       unsigned long val, void *v)
 634 {
 635         struct sun4i_usb_phy_data *data =
 636                 container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
 637         struct power_supply *psy = v;
 638
 639         /* Properties on the vbus_power_supply changed, scan vbus_det */
 640         if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
 641                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 642
 643         return NOTIFY_OK;
 644 }
 645
 646 static struct phy *sun4i_usb_phy_xlate(struct device *dev,
 647                                         struct of_phandle_args *args)
 648 {
 649         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 650
 651         if (args->args[0] >= data->cfg->num_phys)
 652                 return ERR_PTR(-ENODEV);
 653
 654         if (data->cfg->missing_phys & BIT(args->args[0]))
 655                 return ERR_PTR(-ENODEV);
 656
 657         return data->phys[args->args[0]].phy;
 658 }
 659
 660 static int sun4i_usb_phy_remove(struct platform_device *pdev)
 661 {
 662         struct device *dev = &pdev->dev;
 663         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 664
 665         if (data->vbus_power_nb_registered)
 666                 power_supply_unreg_notifier(&data->vbus_power_nb);
 667         if (data->id_det_irq > 0)
 668                 devm_free_irq(dev, data->id_det_irq, data);
 669         if (data->vbus_det_irq > 0)
 670                 devm_free_irq(dev, data->vbus_det_irq, data);
 671
 672         cancel_delayed_work_sync(&data->detect);
 673
 674         return 0;
 675 }
 676
 677 static const unsigned int sun4i_usb_phy0_cable[] = {
 678         EXTCON_USB,
 679         EXTCON_USB_HOST,
 680         EXTCON_NONE,
 681 };
 682
 683 static int sun4i_usb_phy_probe(struct platform_device *pdev)
 684 {
 685         struct sun4i_usb_phy_data *data;
 686         struct device *dev = &pdev->dev;
 687         struct device_node *np = dev->of_node;
 688         struct phy_provider *phy_provider;
 689         struct resource *res;
 690         int i, ret;
 691
 692         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 693         if (!data)
 694                 return -ENOMEM;
 695
 696         spin_lock_init(&data->reg_lock);
 697         INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
 698         dev_set_drvdata(dev, data);
 699         data->cfg = of_device_get_match_data(dev);
 700         if (!data->cfg)
 701                 return -EINVAL;
 702
 703         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
 704         data->base = devm_ioremap_resource(dev, res);
 705         if (IS_ERR(data->base))
 706                 return PTR_ERR(data->base);
 707
 708         data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
 709                                                     GPIOD_IN);
 710         if (IS_ERR(data->id_det_gpio)) {
 711                 dev_err(dev, "Couldn't request ID GPIO\n");
 712                 return PTR_ERR(data->id_det_gpio);
 713         }
 714
 715         data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det",
 716                                                       GPIOD_IN);
 717         if (IS_ERR(data->vbus_det_gpio)) {
 718                 dev_err(dev, "Couldn't request VBUS detect GPIO\n");
 719                 return PTR_ERR(data->vbus_det_gpio);
 720         }
 721
 722         if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
 723                 data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
 724                                                      "usb0_vbus_power-supply");
 725                 if (IS_ERR(data->vbus_power_supply)) {
 726                         dev_err(dev, "Couldn't get the VBUS power supply\n");
 727                         return PTR_ERR(data->vbus_power_supply);
 728                 }
 729
 730                 if (!data->vbus_power_supply)
 731                         return -EPROBE_DEFER;
 732         }
 733
 734         data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0);
 735
 736         data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable);
 737         if (IS_ERR(data->extcon)) {
 738                 dev_err(dev, "Couldn't allocate our extcon device\n");
 739                 return PTR_ERR(data->extcon);
 740         }
 741
 742         ret = devm_extcon_dev_register(dev, data->extcon);
 743         if (ret) {
 744                 dev_err(dev, "failed to register extcon: %d\n", ret);
 745                 return ret;
 746         }
 747
 748         for (i = 0; i < data->cfg->num_phys; i++) {
 749                 struct sun4i_usb_phy *phy = data->phys + i;
 750                 char name[16];
 751
 752                 if (data->cfg->missing_phys & BIT(i))
 753                         continue;
 754
 755                 snprintf(name, sizeof(name), "usb%d_vbus", i);
 756                 phy->vbus = devm_regulator_get_optional(dev, name);
 757                 if (IS_ERR(phy->vbus)) {
 758                         if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) {
 759                                 dev_err(dev,
 760                                         "Couldn't get regulator %s... Deferring probe\n",
 761                                         name);
 762                                 return -EPROBE_DEFER;
 763                         }
 764
 765                         phy->vbus = NULL;
 766                 }
 767
 768                 if (data->cfg->dedicated_clocks)
 769                         snprintf(name, sizeof(name), "usb%d_phy", i);
 770                 else
 771                         strlcpy(name, "usb_phy", sizeof(name));
 772
 773                 phy->clk = devm_clk_get(dev, name);
 774                 if (IS_ERR(phy->clk)) {
 775                         dev_err(dev, "failed to get clock %s\n", name);
 776                         return PTR_ERR(phy->clk);
 777                 }
 778
 779                 /* The first PHY is always tied to OTG, and never HSIC */
 780                 if (data->cfg->hsic_index && i == data->cfg->hsic_index) {
 781                         /* HSIC needs secondary clock */
 782                         snprintf(name, sizeof(name), "usb%d_hsic_12M", i);
 783                         phy->clk2 = devm_clk_get(dev, name);
 784                         if (IS_ERR(phy->clk2)) {
 785                                 dev_err(dev, "failed to get clock %s\n", name);
 786                                 return PTR_ERR(phy->clk2);
 787                         }
 788                 }
 789
 790                 snprintf(name, sizeof(name), "usb%d_reset", i);
 791                 phy->reset = devm_reset_control_get(dev, name);
 792                 if (IS_ERR(phy->reset)) {
 793                         dev_err(dev, "failed to get reset %s\n", name);
 794                         return PTR_ERR(phy->reset);
 795                 }
 796
 797                 if (i || data->cfg->phy0_dual_route) { /* No pmu for musb */
 798                         snprintf(name, sizeof(name), "pmu%d", i);
 799                         res = platform_get_resource_byname(pdev,
 800                                                         IORESOURCE_MEM, name);
 801                         phy->pmu = devm_ioremap_resource(dev, res);
 802                         if (IS_ERR(phy->pmu))
 803                                 return PTR_ERR(phy->pmu);
 804                 }
 805
 806                 phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
 807                 if (IS_ERR(phy->phy)) {
 808                         dev_err(dev, "failed to create PHY %d\n", i);
 809                         return PTR_ERR(phy->phy);
 810                 }
 811
 812                 phy->index = i;
 813                 phy_set_drvdata(phy->phy, &data->phys[i]);
 814         }
 815
 816         data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
 817         if (data->id_det_irq > 0) {
 818                 ret = devm_request_irq(dev, data->id_det_irq,
 819                                 sun4i_usb_phy0_id_vbus_det_irq,
 820                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 821                                 "usb0-id-det", data);
 822                 if (ret) {
 823                         dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
 824                         return ret;
 825                 }
 826         }
 827
 828         data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
 829         if (data->vbus_det_irq > 0) {
 830                 ret = devm_request_irq(dev, data->vbus_det_irq,
 831                                 sun4i_usb_phy0_id_vbus_det_irq,
 832                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 833                                 "usb0-vbus-det", data);
 834                 if (ret) {
 835                         dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
 836                         data->vbus_det_irq = -1;
 837                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 838                         return ret;
 839                 }
 840         }
 841
 842         if (data->vbus_power_supply) {
 843                 data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
 844                 data->vbus_power_nb.priority = 0;
 845                 ret = power_supply_reg_notifier(&data->vbus_power_nb);
 846                 if (ret) {
 847                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 848                         return ret;
 849                 }
 850                 data->vbus_power_nb_registered = true;
 851         }
 852
 853         phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
 854         if (IS_ERR(phy_provider)) {
 855                 sun4i_usb_phy_remove(pdev); /* Stop detect work */
 856                 return PTR_ERR(phy_provider);
 857         }
 858
 859         dev_dbg(dev, "successfully loaded\n");
 860
 861         return 0;
 862 }
 863
 864 static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
 865         .num_phys = 3,
 866         .type = sun4i_a10_phy,
 867         .disc_thresh = 3,
 868         .phyctl_offset = REG_PHYCTL_A10,
 869         .dedicated_clocks = false,
 870         .enable_pmu_unk1 = false,
 871 };
 872
 873 static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {
 874         .num_phys = 2,
 875         .type = sun4i_a10_phy,
 876         .disc_thresh = 2,
 877         .phyctl_offset = REG_PHYCTL_A10,
 878         .dedicated_clocks = false,
 879         .enable_pmu_unk1 = false,
 880 };
 881
 882 static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
 883         .num_phys = 3,
 884         .type = sun6i_a31_phy,
 885         .disc_thresh = 3,
 886         .phyctl_offset = REG_PHYCTL_A10,
 887         .dedicated_clocks = true,
 888         .enable_pmu_unk1 = false,
 889 };
 890
 891 static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = {
 892         .num_phys = 3,
 893         .type = sun4i_a10_phy,
 894         .disc_thresh = 2,
 895         .phyctl_offset = REG_PHYCTL_A10,
 896         .dedicated_clocks = false,
 897         .enable_pmu_unk1 = false,
 898 };
 899
 900 static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = {
 901         .num_phys = 2,
 902         .type = sun6i_a31_phy,
 903         .disc_thresh = 3,
 904         .phyctl_offset = REG_PHYCTL_A10,
 905         .dedicated_clocks = true,
 906         .enable_pmu_unk1 = false,
 907 };
 908
 909 static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
 910         .num_phys = 2,
 911         .type = sun8i_a33_phy,
 912         .disc_thresh = 3,
 913         .phyctl_offset = REG_PHYCTL_A33,
 914         .dedicated_clocks = true,
 915         .enable_pmu_unk1 = false,
 916 };
 917
 918 static const struct sun4i_usb_phy_cfg sun8i_a83t_cfg = {
 919         .num_phys = 3,
 920         .hsic_index = 2,
 921         .type = sun8i_a83t_phy,
 922         .phyctl_offset = REG_PHYCTL_A33,
 923         .dedicated_clocks = true,
 924 };
 925
 926 static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
 927         .num_phys = 4,
 928         .type = sun8i_h3_phy,
 929         .disc_thresh = 3,
 930         .phyctl_offset = REG_PHYCTL_A33,
 931         .dedicated_clocks = true,
 932         .enable_pmu_unk1 = true,
 933         .phy0_dual_route = true,
 934 };
 935
 936 static const struct sun4i_usb_phy_cfg sun8i_r40_cfg = {
 937         .num_phys = 3,
 938         .type = sun8i_r40_phy,
 939         .disc_thresh = 3,
 940         .phyctl_offset = REG_PHYCTL_A33,
 941         .dedicated_clocks = true,
 942         .enable_pmu_unk1 = true,
 943         .phy0_dual_route = true,
 944 };
 945
 946 static const struct sun4i_usb_phy_cfg sun8i_v3s_cfg = {
 947         .num_phys = 1,
 948         .type = sun8i_v3s_phy,
 949         .disc_thresh = 3,
 950         .phyctl_offset = REG_PHYCTL_A33,
 951         .dedicated_clocks = true,
 952         .enable_pmu_unk1 = true,
 953         .phy0_dual_route = true,
 954 };
 955
 956 static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = {
 957         .num_phys = 2,
 958         .type = sun50i_a64_phy,
 959         .disc_thresh = 3,
 960         .phyctl_offset = REG_PHYCTL_A33,
 961         .dedicated_clocks = true,
 962         .enable_pmu_unk1 = true,
 963         .phy0_dual_route = true,
 964 };
 965
 966 static const struct sun4i_usb_phy_cfg sun50i_h6_cfg = {
 967         .num_phys = 4,
 968         .type = sun50i_h6_phy,
 969         .disc_thresh = 3,
 970         .phyctl_offset = REG_PHYCTL_A33,
 971         .dedicated_clocks = true,
 972         .enable_pmu_unk1 = true,
 973         .phy0_dual_route = true,
 974         .missing_phys = BIT(1) | BIT(2),
 975 };
 976
 977 static const struct of_device_id sun4i_usb_phy_of_match[] = {
 978         { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
 979         { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
 980         { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
 981         { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
 982         { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
 983         { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
 984         { .compatible = "allwinner,sun8i-a83t-usb-phy", .data = &sun8i_a83t_cfg },
 985         { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
 986         { .compatible = "allwinner,sun8i-r40-usb-phy", .data = &sun8i_r40_cfg },
 987         { .compatible = "allwinner,sun8i-v3s-usb-phy", .data = &sun8i_v3s_cfg },
 988         { .compatible = "allwinner,sun50i-a64-usb-phy",
 989           .data = &sun50i_a64_cfg},
 990         { .compatible = "allwinner,sun50i-h6-usb-phy", .data = &sun50i_h6_cfg },
 991         { },
 992 };
 993 MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
 994
 995 static struct platform_driver sun4i_usb_phy_driver = {
 996         .probe  = sun4i_usb_phy_probe,
 997         .remove = sun4i_usb_phy_remove,
 998         .driver = {
 999                 .of_match_table = sun4i_usb_phy_of_match,
1000                 .name  = "sun4i-usb-phy",
1001         }
1002 };
1003 module_platform_driver(sun4i_usb_phy_driver);
1004
1005 MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
1006 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
1007 MODULE_LICENSE("GPL v2");