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