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.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_v3s_phy,
 116         sun50i_a64_phy,
 117 };
 118
 119 struct sun4i_usb_phy_cfg {
 120         int num_phys;
 121         int hsic_index;
 122         enum sun4i_usb_phy_type type;
 123         u32 disc_thresh;
 124         u8 phyctl_offset;
 125         bool dedicated_clocks;
 126         bool enable_pmu_unk1;
 127         bool phy0_dual_route;
 128         int missing_phys;
 129 };
 130
 131 struct sun4i_usb_phy_data {
 132         void __iomem *base;
 133         const struct sun4i_usb_phy_cfg *cfg;
 134         enum usb_dr_mode dr_mode;
 135         spinlock_t reg_lock; /* guard access to phyctl reg */
 136         struct sun4i_usb_phy {
 137                 struct phy *phy;
 138                 void __iomem *pmu;
 139                 struct regulator *vbus;
 140                 struct reset_control *reset;
 141                 struct clk *clk;
 142                 struct clk *clk2;
 143                 bool regulator_on;
 144                 int index;
 145         } phys[MAX_PHYS];
 146         /* phy0 / otg related variables */
 147         struct extcon_dev *extcon;
 148         bool phy0_init;
 149         struct gpio_desc *id_det_gpio;
 150         struct gpio_desc *vbus_det_gpio;
 151         struct power_supply *vbus_power_supply;
 152         struct notifier_block vbus_power_nb;
 153         bool vbus_power_nb_registered;
 154         bool force_session_end;
 155         int id_det_irq;
 156         int vbus_det_irq;
 157         int id_det;
 158         int vbus_det;
 159         struct delayed_work detect;
 160 };
 161
 162 #define to_sun4i_usb_phy_data(phy) \
 163         container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
 164
 165 static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
 166 {
 167         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 168         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 169         u32 iscr;
 170
 171         iscr = readl(data->base + REG_ISCR);
 172         iscr &= ~clr;
 173         iscr |= set;
 174         writel(iscr, data->base + REG_ISCR);
 175 }
 176
 177 static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
 178 {
 179         if (val)
 180                 val = ISCR_FORCE_ID_HIGH;
 181         else
 182                 val = ISCR_FORCE_ID_LOW;
 183
 184         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
 185 }
 186
 187 static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
 188 {
 189         if (val)
 190                 val = ISCR_FORCE_VBUS_HIGH;
 191         else
 192                 val = ISCR_FORCE_VBUS_LOW;
 193
 194         sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
 195 }
 196
 197 static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
 198                                 int len)
 199 {
 200         struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
 201         u32 temp, usbc_bit = BIT(phy->index * 2);
 202         void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
 203         unsigned long flags;
 204         int i;
 205
 206         spin_lock_irqsave(&phy_data->reg_lock, flags);
 207
 208         if (phy_data->cfg->phyctl_offset == REG_PHYCTL_A33) {
 209                 /* SoCs newer than A33 need us to set phyctl to 0 explicitly */
 210                 writel(0, phyctl);
 211         }
 212
 213         for (i = 0; i < len; i++) {
 214                 temp = readl(phyctl);
 215
 216                 /* clear the address portion */
 217                 temp &= ~(0xff << 8);
 218
 219                 /* set the address */
 220                 temp |= ((addr + i) << 8);
 221                 writel(temp, phyctl);
 222
 223                 /* set the data bit and clear usbc bit*/
 224                 temp = readb(phyctl);
 225                 if (data & 0x1)
 226                         temp |= PHYCTL_DATA;
 227                 else
 228                         temp &= ~PHYCTL_DATA;
 229                 temp &= ~usbc_bit;
 230                 writeb(temp, phyctl);
 231
 232                 /* pulse usbc_bit */
 233                 temp = readb(phyctl);
 234                 temp |= usbc_bit;
 235                 writeb(temp, phyctl);
 236
 237                 temp = readb(phyctl);
 238                 temp &= ~usbc_bit;
 239                 writeb(temp, phyctl);
 240
 241                 data >>= 1;
 242         }
 243
 244         spin_unlock_irqrestore(&phy_data->reg_lock, flags);
 245 }
 246
 247 static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
 248 {
 249         struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
 250         u32 bits, reg_value;
 251
 252         if (!phy->pmu)
 253                 return;
 254
 255         bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
 256                 SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
 257
 258         /* A83T USB2 is HSIC */
 259         if (phy_data->cfg->type == sun8i_a83t_phy && phy->index == 2)
 260                 bits |= SUNXI_EHCI_HS_FORCE | SUNXI_HSIC_CONNECT_INT |
 261                         SUNXI_HSIC;
 262
 263         reg_value = readl(phy->pmu);
 264
 265         if (enable)
 266                 reg_value |= bits;
 267         else
 268                 reg_value &= ~bits;
 269
 270         writel(reg_value, phy->pmu);
 271 }
 272
 273 static int sun4i_usb_phy_init(struct phy *_phy)
 274 {
 275         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 276         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 277         int ret;
 278         u32 val;
 279
 280         ret = clk_prepare_enable(phy->clk);
 281         if (ret)
 282                 return ret;
 283
 284         ret = clk_prepare_enable(phy->clk2);
 285         if (ret) {
 286                 clk_disable_unprepare(phy->clk);
 287                 return ret;
 288         }
 289
 290         ret = reset_control_deassert(phy->reset);
 291         if (ret) {
 292                 clk_disable_unprepare(phy->clk2);
 293                 clk_disable_unprepare(phy->clk);
 294                 return ret;
 295         }
 296
 297         if (data->cfg->type == sun8i_a83t_phy) {
 298                 if (phy->index == 0) {
 299                         val = readl(data->base + data->cfg->phyctl_offset);
 300                         val |= PHY_CTL_VBUSVLDEXT;
 301                         val &= ~PHY_CTL_SIDDQ;
 302                         writel(val, data->base + data->cfg->phyctl_offset);
 303                 }
 304         } else {
 305                 if (phy->pmu && data->cfg->enable_pmu_unk1) {
 306                         val = readl(phy->pmu + REG_PMU_UNK1);
 307                         writel(val & ~2, phy->pmu + REG_PMU_UNK1);
 308                 }
 309
 310                 /* Enable USB 45 Ohm resistor calibration */
 311                 if (phy->index == 0)
 312                         sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
 313
 314                 /* Adjust PHY's magnitude and rate */
 315                 sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
 316
 317                 /* Disconnect threshold adjustment */
 318                 sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
 319                                     data->cfg->disc_thresh, 2);
 320         }
 321
 322         sun4i_usb_phy_passby(phy, 1);
 323
 324         if (phy->index == 0) {
 325                 data->phy0_init = true;
 326
 327                 /* Enable pull-ups */
 328                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
 329                 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
 330
 331                 /* Force ISCR and cable state updates */
 332                 data->id_det = -1;
 333                 data->vbus_det = -1;
 334                 queue_delayed_work(system_wq, &data->detect, 0);
 335         }
 336
 337         return 0;
 338 }
 339
 340 static int sun4i_usb_phy_exit(struct phy *_phy)
 341 {
 342         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 343         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 344
 345         if (phy->index == 0) {
 346                 if (data->cfg->type == sun8i_a83t_phy) {
 347                         void __iomem *phyctl = data->base +
 348                                 data->cfg->phyctl_offset;
 349
 350                         writel(readl(phyctl) | PHY_CTL_SIDDQ, phyctl);
 351                 }
 352
 353                 /* Disable pull-ups */
 354                 sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
 355                 sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
 356                 data->phy0_init = false;
 357         }
 358
 359         sun4i_usb_phy_passby(phy, 0);
 360         reset_control_assert(phy->reset);
 361         clk_disable_unprepare(phy->clk2);
 362         clk_disable_unprepare(phy->clk);
 363
 364         return 0;
 365 }
 366
 367 static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data)
 368 {
 369         switch (data->dr_mode) {
 370         case USB_DR_MODE_OTG:
 371                 if (data->id_det_gpio)
 372                         return gpiod_get_value_cansleep(data->id_det_gpio);
 373                 else
 374                         return 1; /* Fallback to peripheral mode */
 375         case USB_DR_MODE_HOST:
 376                 return 0;
 377         case USB_DR_MODE_PERIPHERAL:
 378         default:
 379                 return 1;
 380         }
 381 }
 382
 383 static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
 384 {
 385         if (data->vbus_det_gpio)
 386                 return gpiod_get_value_cansleep(data->vbus_det_gpio);
 387
 388         if (data->vbus_power_supply) {
 389                 union power_supply_propval val;
 390                 int r;
 391
 392                 r = power_supply_get_property(data->vbus_power_supply,
 393                                               POWER_SUPPLY_PROP_PRESENT, &val);
 394                 if (r == 0)
 395                         return val.intval;
 396         }
 397
 398         /* Fallback: report vbus as high */
 399         return 1;
 400 }
 401
 402 static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
 403 {
 404         return data->vbus_det_gpio || data->vbus_power_supply;
 405 }
 406
 407 static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data)
 408 {
 409         if ((data->id_det_gpio && data->id_det_irq <= 0) ||
 410             (data->vbus_det_gpio && data->vbus_det_irq <= 0))
 411                 return true;
 412
 413         /*
 414          * The A31/A23/A33 companion pmics (AXP221/AXP223) do not
 415          * generate vbus change interrupts when the board is driving
 416          * vbus using the N_VBUSEN pin on the pmic, so we must poll
 417          * when using the pmic for vbus-det _and_ we're driving vbus.
 418          */
 419         if ((data->cfg->type == sun6i_a31_phy ||
 420              data->cfg->type == sun8i_a33_phy) &&
 421             data->vbus_power_supply && data->phys[0].regulator_on)
 422                 return true;
 423
 424         return false;
 425 }
 426
 427 static int sun4i_usb_phy_power_on(struct phy *_phy)
 428 {
 429         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 430         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 431         int ret;
 432
 433         if (!phy->vbus || phy->regulator_on)
 434                 return 0;
 435
 436         /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
 437         if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
 438                                 data->vbus_det) {
 439                 dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n");
 440                 return 0;
 441         }
 442
 443         ret = regulator_enable(phy->vbus);
 444         if (ret)
 445                 return ret;
 446
 447         phy->regulator_on = true;
 448
 449         /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
 450         if (phy->index == 0 && sun4i_usb_phy0_poll(data))
 451                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 452
 453         return 0;
 454 }
 455
 456 static int sun4i_usb_phy_power_off(struct phy *_phy)
 457 {
 458         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 459         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 460
 461         if (!phy->vbus || !phy->regulator_on)
 462                 return 0;
 463
 464         regulator_disable(phy->vbus);
 465         phy->regulator_on = false;
 466
 467         /*
 468          * phy0 vbus typically slowly discharges, sometimes this causes the
 469          * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
 470          */
 471         if (phy->index == 0 && !sun4i_usb_phy0_poll(data))
 472                 mod_delayed_work(system_wq, &data->detect, POLL_TIME);
 473
 474         return 0;
 475 }
 476
 477 static int sun4i_usb_phy_set_mode(struct phy *_phy, enum phy_mode mode)
 478 {
 479         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 480         struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
 481         int new_mode;
 482
 483         if (phy->index != 0) {
 484                 if (mode == PHY_MODE_USB_HOST)
 485                         return 0;
 486                 return -EINVAL;
 487         }
 488
 489         switch (mode) {
 490         case PHY_MODE_USB_HOST:
 491                 new_mode = USB_DR_MODE_HOST;
 492                 break;
 493         case PHY_MODE_USB_DEVICE:
 494                 new_mode = USB_DR_MODE_PERIPHERAL;
 495                 break;
 496         case PHY_MODE_USB_OTG:
 497                 new_mode = USB_DR_MODE_OTG;
 498                 break;
 499         default:
 500                 return -EINVAL;
 501         }
 502
 503         if (new_mode != data->dr_mode) {
 504                 dev_info(&_phy->dev, "Changing dr_mode to %d\n", new_mode);
 505                 data->dr_mode = new_mode;
 506         }
 507
 508         data->id_det = -1; /* Force reprocessing of id */
 509         data->force_session_end = true;
 510         queue_delayed_work(system_wq, &data->detect, 0);
 511
 512         return 0;
 513 }
 514
 515 void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
 516 {
 517         struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
 518
 519         sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
 520 }
 521 EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
 522
 523 static const struct phy_ops sun4i_usb_phy_ops = {
 524         .init           = sun4i_usb_phy_init,
 525         .exit           = sun4i_usb_phy_exit,
 526         .power_on       = sun4i_usb_phy_power_on,
 527         .power_off      = sun4i_usb_phy_power_off,
 528         .set_mode       = sun4i_usb_phy_set_mode,
 529         .owner          = THIS_MODULE,
 530 };
 531
 532 static void sun4i_usb_phy0_reroute(struct sun4i_usb_phy_data *data, int id_det)
 533 {
 534         u32 regval;
 535
 536         regval = readl(data->base + REG_PHY_OTGCTL);
 537         if (id_det == 0) {
 538                 /* Host mode. Route phy0 to EHCI/OHCI */
 539                 regval &= ~OTGCTL_ROUTE_MUSB;
 540         } else {
 541                 /* Peripheral mode. Route phy0 to MUSB */
 542                 regval |= OTGCTL_ROUTE_MUSB;
 543         }
 544         writel(regval, data->base + REG_PHY_OTGCTL);
 545 }
 546
 547 static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
 548 {
 549         struct sun4i_usb_phy_data *data =
 550                 container_of(work, struct sun4i_usb_phy_data, detect.work);
 551         struct phy *phy0 = data->phys[0].phy;
 552         struct sun4i_usb_phy *phy;
 553         bool force_session_end, id_notify = false, vbus_notify = false;
 554         int id_det, vbus_det;
 555
 556         if (!phy0)
 557                 return;
 558
 559         phy = phy_get_drvdata(phy0);
 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                 /* Enable PHY0 passby for host mode only. */
 611                 sun4i_usb_phy_passby(phy, !id_det);
 612
 613                 /* Re-route PHY0 if necessary */
 614                 if (data->cfg->phy0_dual_route)
 615                         sun4i_usb_phy0_reroute(data, id_det);
 616         }
 617
 618         if (vbus_notify)
 619                 extcon_set_state_sync(data->extcon, EXTCON_USB, vbus_det);
 620
 621         if (sun4i_usb_phy0_poll(data))
 622                 queue_delayed_work(system_wq, &data->detect, POLL_TIME);
 623 }
 624
 625 static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
 626 {
 627         struct sun4i_usb_phy_data *data = dev_id;
 628
 629         /* vbus or id changed, let the pins settle and then scan them */
 630         mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 631
 632         return IRQ_HANDLED;
 633 }
 634
 635 static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
 636                                       unsigned long val, void *v)
 637 {
 638         struct sun4i_usb_phy_data *data =
 639                 container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
 640         struct power_supply *psy = v;
 641
 642         /* Properties on the vbus_power_supply changed, scan vbus_det */
 643         if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
 644                 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
 645
 646         return NOTIFY_OK;
 647 }
 648
 649 static struct phy *sun4i_usb_phy_xlate(struct device *dev,
 650                                         struct of_phandle_args *args)
 651 {
 652         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 653
 654         if (args->args[0] >= data->cfg->num_phys)
 655                 return ERR_PTR(-ENODEV);
 656
 657         if (data->cfg->missing_phys & BIT(args->args[0]))
 658                 return ERR_PTR(-ENODEV);
 659
 660         return data->phys[args->args[0]].phy;
 661 }
 662
 663 static int sun4i_usb_phy_remove(struct platform_device *pdev)
 664 {
 665         struct device *dev = &pdev->dev;
 666         struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
 667
 668         if (data->vbus_power_nb_registered)
 669                 power_supply_unreg_notifier(&data->vbus_power_nb);
 670         if (data->id_det_irq > 0)
 671                 devm_free_irq(dev, data->id_det_irq, data);
 672         if (data->vbus_det_irq > 0)
 673                 devm_free_irq(dev, data->vbus_det_irq, data);
 674
 675         cancel_delayed_work_sync(&data->detect);
 676
 677         return 0;
 678 }
 679
 680 static const unsigned int sun4i_usb_phy0_cable[] = {
 681         EXTCON_USB,
 682         EXTCON_USB_HOST,
 683         EXTCON_NONE,
 684 };
 685
 686 static int sun4i_usb_phy_probe(struct platform_device *pdev)
 687 {
 688         struct sun4i_usb_phy_data *data;
 689         struct device *dev = &pdev->dev;
 690         struct device_node *np = dev->of_node;
 691         struct phy_provider *phy_provider;
 692         struct resource *res;
 693         int i, ret;
 694
 695         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 696         if (!data)
 697                 return -ENOMEM;
 698
 699         spin_lock_init(&data->reg_lock);
 700         INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
 701         dev_set_drvdata(dev, data);
 702         data->cfg = of_device_get_match_data(dev);
 703         if (!data->cfg)
 704                 return -EINVAL;
 705
 706         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
 707         data->base = devm_ioremap_resource(dev, res);
 708         if (IS_ERR(data->base))
 709                 return PTR_ERR(data->base);
 710
 711         data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
 712                                                     GPIOD_IN);
 713         if (IS_ERR(data->id_det_gpio)) {
 714                 dev_err(dev, "Couldn't request ID GPIO\n");
 715                 return PTR_ERR(data->id_det_gpio);
 716         }
 717
 718         data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det",
 719                                                       GPIOD_IN);
 720         if (IS_ERR(data->vbus_det_gpio)) {
 721                 dev_err(dev, "Couldn't request VBUS detect GPIO\n");
 722                 return PTR_ERR(data->vbus_det_gpio);
 723         }
 724
 725         if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
 726                 data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
 727                                                      "usb0_vbus_power-supply");
 728                 if (IS_ERR(data->vbus_power_supply)) {
 729                         dev_err(dev, "Couldn't get the VBUS power supply\n");
 730                         return PTR_ERR(data->vbus_power_supply);
 731                 }
 732
 733                 if (!data->vbus_power_supply)
 734                         return -EPROBE_DEFER;
 735         }
 736
 737         data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0);
 738
 739         data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable);
 740         if (IS_ERR(data->extcon)) {
 741                 dev_err(dev, "Couldn't allocate our extcon device\n");
 742                 return PTR_ERR(data->extcon);
 743         }
 744
 745         ret = devm_extcon_dev_register(dev, data->extcon);
 746         if (ret) {
 747                 dev_err(dev, "failed to register extcon: %d\n", ret);
 748                 return ret;
 749         }
 750
 751         for (i = 0; i < data->cfg->num_phys; i++) {
 752                 struct sun4i_usb_phy *phy = data->phys + i;
 753                 char name[16];
 754
 755                 if (data->cfg->missing_phys & BIT(i))
 756                         continue;
 757
 758                 snprintf(name, sizeof(name), "usb%d_vbus", i);
 759                 phy->vbus = devm_regulator_get_optional(dev, name);
 760                 if (IS_ERR(phy->vbus)) {
 761                         if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) {
 762                                 dev_err(dev,
 763                                         "Couldn't get regulator %s... Deferring probe\n",
 764                                         name);
 765                                 return -EPROBE_DEFER;
 766                         }
 767
 768                         phy->vbus = NULL;
 769                 }
 770
 771                 if (data->cfg->dedicated_clocks)
 772                         snprintf(name, sizeof(name), "usb%d_phy", i);
 773                 else
 774                         strlcpy(name, "usb_phy", sizeof(name));
 775
 776                 phy->clk = devm_clk_get(dev, name);
 777                 if (IS_ERR(phy->clk)) {
 778                         dev_err(dev, "failed to get clock %s\n", name);
 779                         return PTR_ERR(phy->clk);
 780                 }
 781
 782                 /* The first PHY is always tied to OTG, and never HSIC */
 783                 if (data->cfg->hsic_index && i == data->cfg->hsic_index) {
 784                         /* HSIC needs secondary clock */
 785                         snprintf(name, sizeof(name), "usb%d_hsic_12M", i);
 786                         phy->clk2 = devm_clk_get(dev, name);
 787                         if (IS_ERR(phy->clk2)) {
 788                                 dev_err(dev, "failed to get clock %s\n", name);
 789                                 return PTR_ERR(phy->clk2);
 790                         }
 791                 }
 792
 793                 snprintf(name, sizeof(name), "usb%d_reset", i);
 794                 phy->reset = devm_reset_control_get(dev, name);
 795                 if (IS_ERR(phy->reset)) {
 796                         dev_err(dev, "failed to get reset %s\n", name);
 797                         return PTR_ERR(phy->reset);
 798                 }
 799
 800                 if (i || data->cfg->phy0_dual_route) { /* No pmu for musb */
 801                         snprintf(name, sizeof(name), "pmu%d", i);
 802                         res = platform_get_resource_byname(pdev,
 803                                                         IORESOURCE_MEM, name);
 804                         phy->pmu = devm_ioremap_resource(dev, res);
 805                         if (IS_ERR(phy->pmu))
 806                                 return PTR_ERR(phy->pmu);
 807                 }
 808
 809                 phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
 810                 if (IS_ERR(phy->phy)) {
 811                         dev_err(dev, "failed to create PHY %d\n", i);
 812                         return PTR_ERR(phy->phy);
 813                 }
 814
 815                 phy->index = i;
 816                 phy_set_drvdata(phy->phy, &data->phys[i]);
 817         }
 818
 819         data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
 820         if (data->id_det_irq > 0) {
 821                 ret = devm_request_irq(dev, data->id_det_irq,
 822                                 sun4i_usb_phy0_id_vbus_det_irq,
 823                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 824                                 "usb0-id-det", data);
 825                 if (ret) {
 826                         dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
 827                         return ret;
 828                 }
 829         }
 830
 831         data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
 832         if (data->vbus_det_irq > 0) {
 833                 ret = devm_request_irq(dev, data->vbus_det_irq,
 834                                 sun4i_usb_phy0_id_vbus_det_irq,
 835                                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 836                                 "usb0-vbus-det", data);
 837                 if (ret) {
 838                         dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
 839                         data->vbus_det_irq = -1;
 840                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 841                         return ret;
 842                 }
 843         }
 844
 845         if (data->vbus_power_supply) {
 846                 data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
 847                 data->vbus_power_nb.priority = 0;
 848                 ret = power_supply_reg_notifier(&data->vbus_power_nb);
 849                 if (ret) {
 850                         sun4i_usb_phy_remove(pdev); /* Stop detect work */
 851                         return ret;
 852                 }
 853                 data->vbus_power_nb_registered = true;
 854         }
 855
 856         phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
 857         if (IS_ERR(phy_provider)) {
 858                 sun4i_usb_phy_remove(pdev); /* Stop detect work */
 859                 return PTR_ERR(phy_provider);
 860         }
 861
 862         dev_dbg(dev, "successfully loaded\n");
 863
 864         return 0;
 865 }
 866
 867 static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
 868         .num_phys = 3,
 869         .type = sun4i_a10_phy,
 870         .disc_thresh = 3,
 871         .phyctl_offset = REG_PHYCTL_A10,
 872         .dedicated_clocks = false,
 873         .enable_pmu_unk1 = false,
 874 };
 875
 876 static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {
 877         .num_phys = 2,
 878         .type = sun4i_a10_phy,
 879         .disc_thresh = 2,
 880         .phyctl_offset = REG_PHYCTL_A10,
 881         .dedicated_clocks = false,
 882         .enable_pmu_unk1 = false,
 883 };
 884
 885 static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
 886         .num_phys = 3,
 887         .type = sun6i_a31_phy,
 888         .disc_thresh = 3,
 889         .phyctl_offset = REG_PHYCTL_A10,
 890         .dedicated_clocks = true,
 891         .enable_pmu_unk1 = false,
 892 };
 893
 894 static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = {
 895         .num_phys = 3,
 896         .type = sun4i_a10_phy,
 897         .disc_thresh = 2,
 898         .phyctl_offset = REG_PHYCTL_A10,
 899         .dedicated_clocks = false,
 900         .enable_pmu_unk1 = false,
 901 };
 902
 903 static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = {
 904         .num_phys = 2,
 905         .type = sun6i_a31_phy,
 906         .disc_thresh = 3,
 907         .phyctl_offset = REG_PHYCTL_A10,
 908         .dedicated_clocks = true,
 909         .enable_pmu_unk1 = false,
 910 };
 911
 912 static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
 913         .num_phys = 2,
 914         .type = sun8i_a33_phy,
 915         .disc_thresh = 3,
 916         .phyctl_offset = REG_PHYCTL_A33,
 917         .dedicated_clocks = true,
 918         .enable_pmu_unk1 = false,
 919 };
 920
 921 static const struct sun4i_usb_phy_cfg sun8i_a83t_cfg = {
 922         .num_phys = 3,
 923         .hsic_index = 2,
 924         .type = sun8i_a83t_phy,
 925         .phyctl_offset = REG_PHYCTL_A33,
 926         .dedicated_clocks = true,
 927 };
 928
 929 static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
 930         .num_phys = 4,
 931         .type = sun8i_h3_phy,
 932         .disc_thresh = 3,
 933         .phyctl_offset = REG_PHYCTL_A33,
 934         .dedicated_clocks = true,
 935         .enable_pmu_unk1 = true,
 936         .phy0_dual_route = true,
 937 };
 938
 939 static const struct sun4i_usb_phy_cfg sun8i_v3s_cfg = {
 940         .num_phys = 1,
 941         .type = sun8i_v3s_phy,
 942         .disc_thresh = 3,
 943         .phyctl_offset = REG_PHYCTL_A33,
 944         .dedicated_clocks = true,
 945         .enable_pmu_unk1 = true,
 946 };
 947
 948 static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = {
 949         .num_phys = 2,
 950         .type = sun50i_a64_phy,
 951         .disc_thresh = 3,
 952         .phyctl_offset = REG_PHYCTL_A33,
 953         .dedicated_clocks = true,
 954         .enable_pmu_unk1 = true,
 955         .phy0_dual_route = true,
 956 };
 957
 958 static const struct of_device_id sun4i_usb_phy_of_match[] = {
 959         { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
 960         { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
 961         { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
 962         { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
 963         { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
 964         { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
 965         { .compatible = "allwinner,sun8i-a83t-usb-phy", .data = &sun8i_a83t_cfg },
 966         { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
 967         { .compatible = "allwinner,sun8i-v3s-usb-phy", .data = &sun8i_v3s_cfg },
 968         { .compatible = "allwinner,sun50i-a64-usb-phy",
 969           .data = &sun50i_a64_cfg},
 970         { },
 971 };
 972 MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
 973
 974 static struct platform_driver sun4i_usb_phy_driver = {
 975         .probe  = sun4i_usb_phy_probe,
 976         .remove = sun4i_usb_phy_remove,
 977         .driver = {
 978                 .of_match_table = sun4i_usb_phy_of_match,
 979                 .name  = "sun4i-usb-phy",
 980         }
 981 };
 982 module_platform_driver(sun4i_usb_phy_driver);
 983
 984 MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
 985 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
 986 MODULE_LICENSE("GPL v2");