drivers/phy/rockchip/phy-rockchip-inno-usb2.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Rockchip USB2.0 PHY with Innosilicon IP block driver
   4  *
   5  * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/clk-provider.h>
  10 #include <linux/delay.h>
  11 #include <linux/extcon-provider.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/io.h>
  14 #include <linux/gpio/consumer.h>
  15 #include <linux/jiffies.h>
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/mutex.h>
  19 #include <linux/of.h>
  20 #include <linux/of_address.h>
  21 #include <linux/of_irq.h>
  22 #include <linux/of_platform.h>
  23 #include <linux/phy/phy.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/power_supply.h>
  26 #include <linux/regmap.h>
  27 #include <linux/mfd/syscon.h>
  28 #include <linux/usb/of.h>
  29 #include <linux/usb/otg.h>
  30
  31 #define BIT_WRITEABLE_SHIFT     16
  32 #define SCHEDULE_DELAY          (60 * HZ)
  33 #define OTG_SCHEDULE_DELAY      (2 * HZ)
  34
  35 enum rockchip_usb2phy_port_id {
  36         USB2PHY_PORT_OTG,
  37         USB2PHY_PORT_HOST,
  38         USB2PHY_NUM_PORTS,
  39 };
  40
  41 enum rockchip_usb2phy_host_state {
  42         PHY_STATE_HS_ONLINE     = 0,
  43         PHY_STATE_DISCONNECT    = 1,
  44         PHY_STATE_CONNECT       = 2,
  45         PHY_STATE_FS_LS_ONLINE  = 4,
  46 };
  47
  48 /**
  49  * enum usb_chg_state - Different states involved in USB charger detection.
  50  * @USB_CHG_STATE_UNDEFINED:    USB charger is not connected or detection
  51  *                              process is not yet started.
  52  * @USB_CHG_STATE_WAIT_FOR_DCD: Waiting for Data pins contact.
  53  * @USB_CHG_STATE_DCD_DONE:     Data pin contact is detected.
  54  * @USB_CHG_STATE_PRIMARY_DONE: Primary detection is completed (Detects
  55  *                              between SDP and DCP/CDP).
  56  * @USB_CHG_STATE_SECONDARY_DONE: Secondary detection is completed (Detects
  57  *                                between DCP and CDP).
  58  * @USB_CHG_STATE_DETECTED:     USB charger type is determined.
  59  */
  60 enum usb_chg_state {
  61         USB_CHG_STATE_UNDEFINED = 0,
  62         USB_CHG_STATE_WAIT_FOR_DCD,
  63         USB_CHG_STATE_DCD_DONE,
  64         USB_CHG_STATE_PRIMARY_DONE,
  65         USB_CHG_STATE_SECONDARY_DONE,
  66         USB_CHG_STATE_DETECTED,
  67 };
  68
  69 static const unsigned int rockchip_usb2phy_extcon_cable[] = {
  70         EXTCON_USB,
  71         EXTCON_USB_HOST,
  72         EXTCON_CHG_USB_SDP,
  73         EXTCON_CHG_USB_CDP,
  74         EXTCON_CHG_USB_DCP,
  75         EXTCON_CHG_USB_SLOW,
  76         EXTCON_NONE,
  77 };
  78
  79 struct usb2phy_reg {
  80         unsigned int    offset;
  81         unsigned int    bitend;
  82         unsigned int    bitstart;
  83         unsigned int    disable;
  84         unsigned int    enable;
  85 };
  86
  87 /**
  88  * struct rockchip_chg_det_reg - usb charger detect registers
  89  * @cp_det: charging port detected successfully.
  90  * @dcp_det: dedicated charging port detected successfully.
  91  * @dp_det: assert data pin connect successfully.
  92  * @idm_sink_en: open dm sink curren.
  93  * @idp_sink_en: open dp sink current.
  94  * @idp_src_en: open dm source current.
  95  * @rdm_pdwn_en: open dm pull down resistor.
  96  * @vdm_src_en: open dm voltage source.
  97  * @vdp_src_en: open dp voltage source.
  98  * @opmode: utmi operational mode.
  99  */
 100 struct rockchip_chg_det_reg {
 101         struct usb2phy_reg      cp_det;
 102         struct usb2phy_reg      dcp_det;
 103         struct usb2phy_reg      dp_det;
 104         struct usb2phy_reg      idm_sink_en;
 105         struct usb2phy_reg      idp_sink_en;
 106         struct usb2phy_reg      idp_src_en;
 107         struct usb2phy_reg      rdm_pdwn_en;
 108         struct usb2phy_reg      vdm_src_en;
 109         struct usb2phy_reg      vdp_src_en;
 110         struct usb2phy_reg      opmode;
 111 };
 112
 113 /**
 114  * struct rockchip_usb2phy_port_cfg - usb-phy port configuration.
 115  * @phy_sus: phy suspend register.
 116  * @bvalid_det_en: vbus valid rise detection enable register.
 117  * @bvalid_det_st: vbus valid rise detection status register.
 118  * @bvalid_det_clr: vbus valid rise detection clear register.
 119  * @ls_det_en: linestate detection enable register.
 120  * @ls_det_st: linestate detection state register.
 121  * @ls_det_clr: linestate detection clear register.
 122  * @utmi_avalid: utmi vbus avalid status register.
 123  * @utmi_bvalid: utmi vbus bvalid status register.
 124  * @utmi_ls: utmi linestate state register.
 125  * @utmi_hstdet: utmi host disconnect register.
 126  */
 127 struct rockchip_usb2phy_port_cfg {
 128         struct usb2phy_reg      phy_sus;
 129         struct usb2phy_reg      bvalid_det_en;
 130         struct usb2phy_reg      bvalid_det_st;
 131         struct usb2phy_reg      bvalid_det_clr;
 132         struct usb2phy_reg      ls_det_en;
 133         struct usb2phy_reg      ls_det_st;
 134         struct usb2phy_reg      ls_det_clr;
 135         struct usb2phy_reg      utmi_avalid;
 136         struct usb2phy_reg      utmi_bvalid;
 137         struct usb2phy_reg      utmi_ls;
 138         struct usb2phy_reg      utmi_hstdet;
 139 };
 140
 141 /**
 142  * struct rockchip_usb2phy_cfg - usb-phy configuration.
 143  * @reg: the address offset of grf for usb-phy config.
 144  * @num_ports: specify how many ports that the phy has.
 145  * @clkout_ctl: keep on/turn off output clk of phy.
 146  * @port_cfgs: usb-phy port configurations.
 147  * @chg_det: charger detection registers.
 148  */
 149 struct rockchip_usb2phy_cfg {
 150         unsigned int    reg;
 151         unsigned int    num_ports;
 152         struct usb2phy_reg      clkout_ctl;
 153         const struct rockchip_usb2phy_port_cfg  port_cfgs[USB2PHY_NUM_PORTS];
 154         const struct rockchip_chg_det_reg       chg_det;
 155 };
 156
 157 /**
 158  * struct rockchip_usb2phy_port - usb-phy port data.
 159  * @phy: generic phy.
 160  * @port_id: flag for otg port or host port.
 161  * @suspended: phy suspended flag.
 162  * @vbus_attached: otg device vbus status.
 163  * @bvalid_irq: IRQ number assigned for vbus valid rise detection.
 164  * @ls_irq: IRQ number assigned for linestate detection.
 165  * @otg_mux_irq: IRQ number which multiplex otg-id/otg-bvalid/linestate
 166  *               irqs to one irq in otg-port.
 167  * @mutex: for register updating in sm_work.
 168  * @chg_work: charge detect work.
 169  * @otg_sm_work: OTG state machine work.
 170  * @sm_work: HOST state machine work.
 171  * @port_cfg: port register configuration, assigned by driver data.
 172  * @event_nb: hold event notification callback.
 173  * @state: define OTG enumeration states before device reset.
 174  * @mode: the dr_mode of the controller.
 175  */
 176 struct rockchip_usb2phy_port {
 177         struct phy      *phy;
 178         unsigned int    port_id;
 179         bool            suspended;
 180         bool            vbus_attached;
 181         int             bvalid_irq;
 182         int             ls_irq;
 183         int             otg_mux_irq;
 184         struct mutex    mutex;
 185         struct          delayed_work chg_work;
 186         struct          delayed_work otg_sm_work;
 187         struct          delayed_work sm_work;
 188         const struct    rockchip_usb2phy_port_cfg *port_cfg;
 189         struct notifier_block   event_nb;
 190         enum usb_otg_state      state;
 191         enum usb_dr_mode        mode;
 192 };
 193
 194 /**
 195  * struct rockchip_usb2phy - usb2.0 phy driver data.
 196  * @dev: pointer to device.
 197  * @grf: General Register Files regmap.
 198  * @usbgrf: USB General Register Files regmap.
 199  * @clk: clock struct of phy input clk.
 200  * @clk480m: clock struct of phy output clk.
 201  * @clk480m_hw: clock struct of phy output clk management.
 202  * @chg_state: states involved in USB charger detection.
 203  * @chg_type: USB charger types.
 204  * @dcd_retries: The retry count used to track Data contact
 205  *               detection process.
 206  * @edev: extcon device for notification registration
 207  * @phy_cfg: phy register configuration, assigned by driver data.
 208  * @ports: phy port instance.
 209  */
 210 struct rockchip_usb2phy {
 211         struct device   *dev;
 212         struct regmap   *grf;
 213         struct regmap   *usbgrf;
 214         struct clk      *clk;
 215         struct clk      *clk480m;
 216         struct clk_hw   clk480m_hw;
 217         enum usb_chg_state      chg_state;
 218         enum power_supply_type  chg_type;
 219         u8                      dcd_retries;
 220         struct extcon_dev       *edev;
 221         const struct rockchip_usb2phy_cfg       *phy_cfg;
 222         struct rockchip_usb2phy_port    ports[USB2PHY_NUM_PORTS];
 223 };
 224
 225 static inline struct regmap *get_reg_base(struct rockchip_usb2phy *rphy)
 226 {
 227         return rphy->usbgrf == NULL ? rphy->grf : rphy->usbgrf;
 228 }
 229
 230 static inline int property_enable(struct regmap *base,
 231                                   const struct usb2phy_reg *reg, bool en)
 232 {
 233         unsigned int val, mask, tmp;
 234
 235         tmp = en ? reg->enable : reg->disable;
 236         mask = GENMASK(reg->bitend, reg->bitstart);
 237         val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);
 238
 239         return regmap_write(base, reg->offset, val);
 240 }
 241
 242 static inline bool property_enabled(struct regmap *base,
 243                                     const struct usb2phy_reg *reg)
 244 {
 245         int ret;
 246         unsigned int tmp, orig;
 247         unsigned int mask = GENMASK(reg->bitend, reg->bitstart);
 248
 249         ret = regmap_read(base, reg->offset, &orig);
 250         if (ret)
 251                 return false;
 252
 253         tmp = (orig & mask) >> reg->bitstart;
 254         return tmp == reg->enable;
 255 }
 256
 257 static int rockchip_usb2phy_clk480m_prepare(struct clk_hw *hw)
 258 {
 259         struct rockchip_usb2phy *rphy =
 260                 container_of(hw, struct rockchip_usb2phy, clk480m_hw);
 261         struct regmap *base = get_reg_base(rphy);
 262         int ret;
 263
 264         /* turn on 480m clk output if it is off */
 265         if (!property_enabled(base, &rphy->phy_cfg->clkout_ctl)) {
 266                 ret = property_enable(base, &rphy->phy_cfg->clkout_ctl, true);
 267                 if (ret)
 268                         return ret;
 269
 270                 /* waiting for the clk become stable */
 271                 usleep_range(1200, 1300);
 272         }
 273
 274         return 0;
 275 }
 276
 277 static void rockchip_usb2phy_clk480m_unprepare(struct clk_hw *hw)
 278 {
 279         struct rockchip_usb2phy *rphy =
 280                 container_of(hw, struct rockchip_usb2phy, clk480m_hw);
 281         struct regmap *base = get_reg_base(rphy);
 282
 283         /* turn off 480m clk output */
 284         property_enable(base, &rphy->phy_cfg->clkout_ctl, false);
 285 }
 286
 287 static int rockchip_usb2phy_clk480m_prepared(struct clk_hw *hw)
 288 {
 289         struct rockchip_usb2phy *rphy =
 290                 container_of(hw, struct rockchip_usb2phy, clk480m_hw);
 291         struct regmap *base = get_reg_base(rphy);
 292
 293         return property_enabled(base, &rphy->phy_cfg->clkout_ctl);
 294 }
 295
 296 static unsigned long
 297 rockchip_usb2phy_clk480m_recalc_rate(struct clk_hw *hw,
 298                                      unsigned long parent_rate)
 299 {
 300         return 480000000;
 301 }
 302
 303 static const struct clk_ops rockchip_usb2phy_clkout_ops = {
 304         .prepare = rockchip_usb2phy_clk480m_prepare,
 305         .unprepare = rockchip_usb2phy_clk480m_unprepare,
 306         .is_prepared = rockchip_usb2phy_clk480m_prepared,
 307         .recalc_rate = rockchip_usb2phy_clk480m_recalc_rate,
 308 };
 309
 310 static void rockchip_usb2phy_clk480m_unregister(void *data)
 311 {
 312         struct rockchip_usb2phy *rphy = data;
 313
 314         of_clk_del_provider(rphy->dev->of_node);
 315         clk_unregister(rphy->clk480m);
 316 }
 317
 318 static int
 319 rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy)
 320 {
 321         struct device_node *node = rphy->dev->of_node;
 322         struct clk_init_data init;
 323         const char *clk_name;
 324         int ret;
 325
 326         init.flags = 0;
 327         init.name = "clk_usbphy_480m";
 328         init.ops = &rockchip_usb2phy_clkout_ops;
 329
 330         /* optional override of the clockname */
 331         of_property_read_string(node, "clock-output-names", &init.name);
 332
 333         if (rphy->clk) {
 334                 clk_name = __clk_get_name(rphy->clk);
 335                 init.parent_names = &clk_name;
 336                 init.num_parents = 1;
 337         } else {
 338                 init.parent_names = NULL;
 339                 init.num_parents = 0;
 340         }
 341
 342         rphy->clk480m_hw.init = &init;
 343
 344         /* register the clock */
 345         rphy->clk480m = clk_register(rphy->dev, &rphy->clk480m_hw);
 346         if (IS_ERR(rphy->clk480m)) {
 347                 ret = PTR_ERR(rphy->clk480m);
 348                 goto err_ret;
 349         }
 350
 351         ret = of_clk_add_provider(node, of_clk_src_simple_get, rphy->clk480m);
 352         if (ret < 0)
 353                 goto err_clk_provider;
 354
 355         ret = devm_add_action(rphy->dev, rockchip_usb2phy_clk480m_unregister,
 356                               rphy);
 357         if (ret < 0)
 358                 goto err_unreg_action;
 359
 360         return 0;
 361
 362 err_unreg_action:
 363         of_clk_del_provider(node);
 364 err_clk_provider:
 365         clk_unregister(rphy->clk480m);
 366 err_ret:
 367         return ret;
 368 }
 369
 370 static int rockchip_usb2phy_extcon_register(struct rockchip_usb2phy *rphy)
 371 {
 372         int ret;
 373         struct device_node *node = rphy->dev->of_node;
 374         struct extcon_dev *edev;
 375
 376         if (of_property_read_bool(node, "extcon")) {
 377                 edev = extcon_get_edev_by_phandle(rphy->dev, 0);
 378                 if (IS_ERR(edev)) {
 379                         if (PTR_ERR(edev) != -EPROBE_DEFER)
 380                                 dev_err(rphy->dev, "Invalid or missing extcon\n");
 381                         return PTR_ERR(edev);
 382                 }
 383         } else {
 384                 /* Initialize extcon device */
 385                 edev = devm_extcon_dev_allocate(rphy->dev,
 386                                                 rockchip_usb2phy_extcon_cable);
 387
 388                 if (IS_ERR(edev))
 389                         return -ENOMEM;
 390
 391                 ret = devm_extcon_dev_register(rphy->dev, edev);
 392                 if (ret) {
 393                         dev_err(rphy->dev, "failed to register extcon device\n");
 394                         return ret;
 395                 }
 396         }
 397
 398         rphy->edev = edev;
 399
 400         return 0;
 401 }
 402
 403 static int rockchip_usb2phy_init(struct phy *phy)
 404 {
 405         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 406         struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
 407         int ret = 0;
 408
 409         mutex_lock(&rport->mutex);
 410
 411         if (rport->port_id == USB2PHY_PORT_OTG) {
 412                 if (rport->mode != USB_DR_MODE_HOST &&
 413                     rport->mode != USB_DR_MODE_UNKNOWN) {
 414                         /* clear bvalid status and enable bvalid detect irq */
 415                         ret = property_enable(rphy->grf,
 416                                               &rport->port_cfg->bvalid_det_clr,
 417                                               true);
 418                         if (ret)
 419                                 goto out;
 420
 421                         ret = property_enable(rphy->grf,
 422                                               &rport->port_cfg->bvalid_det_en,
 423                                               true);
 424                         if (ret)
 425                                 goto out;
 426
 427                         schedule_delayed_work(&rport->otg_sm_work,
 428                                               OTG_SCHEDULE_DELAY * 3);
 429                 } else {
 430                         /* If OTG works in host only mode, do nothing. */
 431                         dev_dbg(&rport->phy->dev, "mode %d\n", rport->mode);
 432                 }
 433         } else if (rport->port_id == USB2PHY_PORT_HOST) {
 434                 /* clear linestate and enable linestate detect irq */
 435                 ret = property_enable(rphy->grf,
 436                                       &rport->port_cfg->ls_det_clr, true);
 437                 if (ret)
 438                         goto out;
 439
 440                 ret = property_enable(rphy->grf,
 441                                       &rport->port_cfg->ls_det_en, true);
 442                 if (ret)
 443                         goto out;
 444
 445                 schedule_delayed_work(&rport->sm_work, SCHEDULE_DELAY);
 446         }
 447
 448 out:
 449         mutex_unlock(&rport->mutex);
 450         return ret;
 451 }
 452
 453 static int rockchip_usb2phy_power_on(struct phy *phy)
 454 {
 455         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 456         struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
 457         struct regmap *base = get_reg_base(rphy);
 458         int ret;
 459
 460         dev_dbg(&rport->phy->dev, "port power on\n");
 461
 462         if (!rport->suspended)
 463                 return 0;
 464
 465         ret = clk_prepare_enable(rphy->clk480m);
 466         if (ret)
 467                 return ret;
 468
 469         ret = property_enable(base, &rport->port_cfg->phy_sus, false);
 470         if (ret)
 471                 return ret;
 472
 473         /* waiting for the utmi_clk to become stable */
 474         usleep_range(1500, 2000);
 475
 476         rport->suspended = false;
 477         return 0;
 478 }
 479
 480 static int rockchip_usb2phy_power_off(struct phy *phy)
 481 {
 482         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 483         struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
 484         struct regmap *base = get_reg_base(rphy);
 485         int ret;
 486
 487         dev_dbg(&rport->phy->dev, "port power off\n");
 488
 489         if (rport->suspended)
 490                 return 0;
 491
 492         ret = property_enable(base, &rport->port_cfg->phy_sus, true);
 493         if (ret)
 494                 return ret;
 495
 496         rport->suspended = true;
 497         clk_disable_unprepare(rphy->clk480m);
 498
 499         return 0;
 500 }
 501
 502 static int rockchip_usb2phy_exit(struct phy *phy)
 503 {
 504         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 505
 506         if (rport->port_id == USB2PHY_PORT_OTG &&
 507             rport->mode != USB_DR_MODE_HOST &&
 508             rport->mode != USB_DR_MODE_UNKNOWN) {
 509                 cancel_delayed_work_sync(&rport->otg_sm_work);
 510                 cancel_delayed_work_sync(&rport->chg_work);
 511         } else if (rport->port_id == USB2PHY_PORT_HOST)
 512                 cancel_delayed_work_sync(&rport->sm_work);
 513
 514         return 0;
 515 }
 516
 517 static const struct phy_ops rockchip_usb2phy_ops = {
 518         .init           = rockchip_usb2phy_init,
 519         .exit           = rockchip_usb2phy_exit,
 520         .power_on       = rockchip_usb2phy_power_on,
 521         .power_off      = rockchip_usb2phy_power_off,
 522         .owner          = THIS_MODULE,
 523 };
 524
 525 static void rockchip_usb2phy_otg_sm_work(struct work_struct *work)
 526 {
 527         struct rockchip_usb2phy_port *rport =
 528                 container_of(work, struct rockchip_usb2phy_port,
 529                              otg_sm_work.work);
 530         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 531         static unsigned int cable;
 532         unsigned long delay;
 533         bool vbus_attach, sch_work, notify_charger;
 534
 535         vbus_attach = property_enabled(rphy->grf,
 536                                        &rport->port_cfg->utmi_bvalid);
 537
 538         sch_work = false;
 539         notify_charger = false;
 540         delay = OTG_SCHEDULE_DELAY;
 541         dev_dbg(&rport->phy->dev, "%s otg sm work\n",
 542                 usb_otg_state_string(rport->state));
 543
 544         switch (rport->state) {
 545         case OTG_STATE_UNDEFINED:
 546                 rport->state = OTG_STATE_B_IDLE;
 547                 if (!vbus_attach)
 548                         rockchip_usb2phy_power_off(rport->phy);
 549                 /* fall through */
 550         case OTG_STATE_B_IDLE:
 551                 if (extcon_get_state(rphy->edev, EXTCON_USB_HOST) > 0) {
 552                         dev_dbg(&rport->phy->dev, "usb otg host connect\n");
 553                         rport->state = OTG_STATE_A_HOST;
 554                         rockchip_usb2phy_power_on(rport->phy);
 555                         return;
 556                 } else if (vbus_attach) {
 557                         dev_dbg(&rport->phy->dev, "vbus_attach\n");
 558                         switch (rphy->chg_state) {
 559                         case USB_CHG_STATE_UNDEFINED:
 560                                 schedule_delayed_work(&rport->chg_work, 0);
 561                                 return;
 562                         case USB_CHG_STATE_DETECTED:
 563                                 switch (rphy->chg_type) {
 564                                 case POWER_SUPPLY_TYPE_USB:
 565                                         dev_dbg(&rport->phy->dev, "sdp cable is connected\n");
 566                                         rockchip_usb2phy_power_on(rport->phy);
 567                                         rport->state = OTG_STATE_B_PERIPHERAL;
 568                                         notify_charger = true;
 569                                         sch_work = true;
 570                                         cable = EXTCON_CHG_USB_SDP;
 571                                         break;
 572                                 case POWER_SUPPLY_TYPE_USB_DCP:
 573                                         dev_dbg(&rport->phy->dev, "dcp cable is connected\n");
 574                                         rockchip_usb2phy_power_off(rport->phy);
 575                                         notify_charger = true;
 576                                         sch_work = true;
 577                                         cable = EXTCON_CHG_USB_DCP;
 578                                         break;
 579                                 case POWER_SUPPLY_TYPE_USB_CDP:
 580                                         dev_dbg(&rport->phy->dev, "cdp cable is connected\n");
 581                                         rockchip_usb2phy_power_on(rport->phy);
 582                                         rport->state = OTG_STATE_B_PERIPHERAL;
 583                                         notify_charger = true;
 584                                         sch_work = true;
 585                                         cable = EXTCON_CHG_USB_CDP;
 586                                         break;
 587                                 default:
 588                                         break;
 589                                 }
 590                                 break;
 591                         default:
 592                                 break;
 593                         }
 594                 } else {
 595                         notify_charger = true;
 596                         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
 597                         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
 598                 }
 599
 600                 if (rport->vbus_attached != vbus_attach) {
 601                         rport->vbus_attached = vbus_attach;
 602
 603                         if (notify_charger && rphy->edev) {
 604                                 extcon_set_state_sync(rphy->edev,
 605                                                         cable, vbus_attach);
 606                                 if (cable == EXTCON_CHG_USB_SDP)
 607                                         extcon_set_state_sync(rphy->edev,
 608                                                               EXTCON_USB,
 609                                                               vbus_attach);
 610                         }
 611                 }
 612                 break;
 613         case OTG_STATE_B_PERIPHERAL:
 614                 if (!vbus_attach) {
 615                         dev_dbg(&rport->phy->dev, "usb disconnect\n");
 616                         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
 617                         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
 618                         rport->state = OTG_STATE_B_IDLE;
 619                         delay = 0;
 620                         rockchip_usb2phy_power_off(rport->phy);
 621                 }
 622                 sch_work = true;
 623                 break;
 624         case OTG_STATE_A_HOST:
 625                 if (extcon_get_state(rphy->edev, EXTCON_USB_HOST) == 0) {
 626                         dev_dbg(&rport->phy->dev, "usb otg host disconnect\n");
 627                         rport->state = OTG_STATE_B_IDLE;
 628                         rockchip_usb2phy_power_off(rport->phy);
 629                 }
 630                 break;
 631         default:
 632                 break;
 633         }
 634
 635         if (sch_work)
 636                 schedule_delayed_work(&rport->otg_sm_work, delay);
 637 }
 638
 639 static const char *chg_to_string(enum power_supply_type chg_type)
 640 {
 641         switch (chg_type) {
 642         case POWER_SUPPLY_TYPE_USB:
 643                 return "USB_SDP_CHARGER";
 644         case POWER_SUPPLY_TYPE_USB_DCP:
 645                 return "USB_DCP_CHARGER";
 646         case POWER_SUPPLY_TYPE_USB_CDP:
 647                 return "USB_CDP_CHARGER";
 648         default:
 649                 return "INVALID_CHARGER";
 650         }
 651 }
 652
 653 static void rockchip_chg_enable_dcd(struct rockchip_usb2phy *rphy,
 654                                     bool en)
 655 {
 656         struct regmap *base = get_reg_base(rphy);
 657
 658         property_enable(base, &rphy->phy_cfg->chg_det.rdm_pdwn_en, en);
 659         property_enable(base, &rphy->phy_cfg->chg_det.idp_src_en, en);
 660 }
 661
 662 static void rockchip_chg_enable_primary_det(struct rockchip_usb2phy *rphy,
 663                                             bool en)
 664 {
 665         struct regmap *base = get_reg_base(rphy);
 666
 667         property_enable(base, &rphy->phy_cfg->chg_det.vdp_src_en, en);
 668         property_enable(base, &rphy->phy_cfg->chg_det.idm_sink_en, en);
 669 }
 670
 671 static void rockchip_chg_enable_secondary_det(struct rockchip_usb2phy *rphy,
 672                                               bool en)
 673 {
 674         struct regmap *base = get_reg_base(rphy);
 675
 676         property_enable(base, &rphy->phy_cfg->chg_det.vdm_src_en, en);
 677         property_enable(base, &rphy->phy_cfg->chg_det.idp_sink_en, en);
 678 }
 679
 680 #define CHG_DCD_POLL_TIME       (100 * HZ / 1000)
 681 #define CHG_DCD_MAX_RETRIES     6
 682 #define CHG_PRIMARY_DET_TIME    (40 * HZ / 1000)
 683 #define CHG_SECONDARY_DET_TIME  (40 * HZ / 1000)
 684 static void rockchip_chg_detect_work(struct work_struct *work)
 685 {
 686         struct rockchip_usb2phy_port *rport =
 687                 container_of(work, struct rockchip_usb2phy_port, chg_work.work);
 688         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 689         struct regmap *base = get_reg_base(rphy);
 690         bool is_dcd, tmout, vout;
 691         unsigned long delay;
 692
 693         dev_dbg(&rport->phy->dev, "chg detection work state = %d\n",
 694                 rphy->chg_state);
 695         switch (rphy->chg_state) {
 696         case USB_CHG_STATE_UNDEFINED:
 697                 if (!rport->suspended)
 698                         rockchip_usb2phy_power_off(rport->phy);
 699                 /* put the controller in non-driving mode */
 700                 property_enable(base, &rphy->phy_cfg->chg_det.opmode, false);
 701                 /* Start DCD processing stage 1 */
 702                 rockchip_chg_enable_dcd(rphy, true);
 703                 rphy->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
 704                 rphy->dcd_retries = 0;
 705                 delay = CHG_DCD_POLL_TIME;
 706                 break;
 707         case USB_CHG_STATE_WAIT_FOR_DCD:
 708                 /* get data contact detection status */
 709                 is_dcd = property_enabled(rphy->grf,
 710                                           &rphy->phy_cfg->chg_det.dp_det);
 711                 tmout = ++rphy->dcd_retries == CHG_DCD_MAX_RETRIES;
 712                 /* stage 2 */
 713                 if (is_dcd || tmout) {
 714                         /* stage 4 */
 715                         /* Turn off DCD circuitry */
 716                         rockchip_chg_enable_dcd(rphy, false);
 717                         /* Voltage Source on DP, Probe on DM */
 718                         rockchip_chg_enable_primary_det(rphy, true);
 719                         delay = CHG_PRIMARY_DET_TIME;
 720                         rphy->chg_state = USB_CHG_STATE_DCD_DONE;
 721                 } else {
 722                         /* stage 3 */
 723                         delay = CHG_DCD_POLL_TIME;
 724                 }
 725                 break;
 726         case USB_CHG_STATE_DCD_DONE:
 727                 vout = property_enabled(rphy->grf,
 728                                         &rphy->phy_cfg->chg_det.cp_det);
 729                 rockchip_chg_enable_primary_det(rphy, false);
 730                 if (vout) {
 731                         /* Voltage Source on DM, Probe on DP  */
 732                         rockchip_chg_enable_secondary_det(rphy, true);
 733                         delay = CHG_SECONDARY_DET_TIME;
 734                         rphy->chg_state = USB_CHG_STATE_PRIMARY_DONE;
 735                 } else {
 736                         if (rphy->dcd_retries == CHG_DCD_MAX_RETRIES) {
 737                                 /* floating charger found */
 738                                 rphy->chg_type = POWER_SUPPLY_TYPE_USB_DCP;
 739                                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 740                                 delay = 0;
 741                         } else {
 742                                 rphy->chg_type = POWER_SUPPLY_TYPE_USB;
 743                                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 744                                 delay = 0;
 745                         }
 746                 }
 747                 break;
 748         case USB_CHG_STATE_PRIMARY_DONE:
 749                 vout = property_enabled(rphy->grf,
 750                                         &rphy->phy_cfg->chg_det.dcp_det);
 751                 /* Turn off voltage source */
 752                 rockchip_chg_enable_secondary_det(rphy, false);
 753                 if (vout)
 754                         rphy->chg_type = POWER_SUPPLY_TYPE_USB_DCP;
 755                 else
 756                         rphy->chg_type = POWER_SUPPLY_TYPE_USB_CDP;
 757                 /* fall through */
 758         case USB_CHG_STATE_SECONDARY_DONE:
 759                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 760                 delay = 0;
 761                 /* fall through */
 762         case USB_CHG_STATE_DETECTED:
 763                 /* put the controller in normal mode */
 764                 property_enable(base, &rphy->phy_cfg->chg_det.opmode, true);
 765                 rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 766                 dev_info(&rport->phy->dev, "charger = %s\n",
 767                          chg_to_string(rphy->chg_type));
 768                 return;
 769         default:
 770                 return;
 771         }
 772
 773         schedule_delayed_work(&rport->chg_work, delay);
 774 }
 775
 776 /*
 777  * The function manage host-phy port state and suspend/resume phy port
 778  * to save power.
 779  *
 780  * we rely on utmi_linestate and utmi_hostdisconnect to identify whether
 781  * devices is disconnect or not. Besides, we do not need care it is FS/LS
 782  * disconnected or HS disconnected, actually, we just only need get the
 783  * device is disconnected at last through rearm the delayed work,
 784  * to suspend the phy port in _PHY_STATE_DISCONNECT_ case.
 785  *
 786  * NOTE: It may invoke *phy_powr_off or *phy_power_on which will invoke
 787  * some clk related APIs, so do not invoke it from interrupt context directly.
 788  */
 789 static void rockchip_usb2phy_sm_work(struct work_struct *work)
 790 {
 791         struct rockchip_usb2phy_port *rport =
 792                 container_of(work, struct rockchip_usb2phy_port, sm_work.work);
 793         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 794         unsigned int sh = rport->port_cfg->utmi_hstdet.bitend -
 795                           rport->port_cfg->utmi_hstdet.bitstart + 1;
 796         unsigned int ul, uhd, state;
 797         unsigned int ul_mask, uhd_mask;
 798         int ret;
 799
 800         mutex_lock(&rport->mutex);
 801
 802         ret = regmap_read(rphy->grf, rport->port_cfg->utmi_ls.offset, &ul);
 803         if (ret < 0)
 804                 goto next_schedule;
 805
 806         ret = regmap_read(rphy->grf, rport->port_cfg->utmi_hstdet.offset, &uhd);
 807         if (ret < 0)
 808                 goto next_schedule;
 809
 810         uhd_mask = GENMASK(rport->port_cfg->utmi_hstdet.bitend,
 811                            rport->port_cfg->utmi_hstdet.bitstart);
 812         ul_mask = GENMASK(rport->port_cfg->utmi_ls.bitend,
 813                           rport->port_cfg->utmi_ls.bitstart);
 814
 815         /* stitch on utmi_ls and utmi_hstdet as phy state */
 816         state = ((uhd & uhd_mask) >> rport->port_cfg->utmi_hstdet.bitstart) |
 817                 (((ul & ul_mask) >> rport->port_cfg->utmi_ls.bitstart) << sh);
 818
 819         switch (state) {
 820         case PHY_STATE_HS_ONLINE:
 821                 dev_dbg(&rport->phy->dev, "HS online\n");
 822                 break;
 823         case PHY_STATE_FS_LS_ONLINE:
 824                 /*
 825                  * For FS/LS device, the online state share with connect state
 826                  * from utmi_ls and utmi_hstdet register, so we distinguish
 827                  * them via suspended flag.
 828                  *
 829                  * Plus, there are two cases, one is D- Line pull-up, and D+
 830                  * line pull-down, the state is 4; another is D+ line pull-up,
 831                  * and D- line pull-down, the state is 2.
 832                  */
 833                 if (!rport->suspended) {
 834                         /* D- line pull-up, D+ line pull-down */
 835                         dev_dbg(&rport->phy->dev, "FS/LS online\n");
 836                         break;
 837                 }
 838                 /* fall through */
 839         case PHY_STATE_CONNECT:
 840                 if (rport->suspended) {
 841                         dev_dbg(&rport->phy->dev, "Connected\n");
 842                         rockchip_usb2phy_power_on(rport->phy);
 843                         rport->suspended = false;
 844                 } else {
 845                         /* D+ line pull-up, D- line pull-down */
 846                         dev_dbg(&rport->phy->dev, "FS/LS online\n");
 847                 }
 848                 break;
 849         case PHY_STATE_DISCONNECT:
 850                 if (!rport->suspended) {
 851                         dev_dbg(&rport->phy->dev, "Disconnected\n");
 852                         rockchip_usb2phy_power_off(rport->phy);
 853                         rport->suspended = true;
 854                 }
 855
 856                 /*
 857                  * activate the linestate detection to get the next device
 858                  * plug-in irq.
 859                  */
 860                 property_enable(rphy->grf, &rport->port_cfg->ls_det_clr, true);
 861                 property_enable(rphy->grf, &rport->port_cfg->ls_det_en, true);
 862
 863                 /*
 864                  * we don't need to rearm the delayed work when the phy port
 865                  * is suspended.
 866                  */
 867                 mutex_unlock(&rport->mutex);
 868                 return;
 869         default:
 870                 dev_dbg(&rport->phy->dev, "unknown phy state\n");
 871                 break;
 872         }
 873
 874 next_schedule:
 875         mutex_unlock(&rport->mutex);
 876         schedule_delayed_work(&rport->sm_work, SCHEDULE_DELAY);
 877 }
 878
 879 static irqreturn_t rockchip_usb2phy_linestate_irq(int irq, void *data)
 880 {
 881         struct rockchip_usb2phy_port *rport = data;
 882         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 883
 884         if (!property_enabled(rphy->grf, &rport->port_cfg->ls_det_st))
 885                 return IRQ_NONE;
 886
 887         mutex_lock(&rport->mutex);
 888
 889         /* disable linestate detect irq and clear its status */
 890         property_enable(rphy->grf, &rport->port_cfg->ls_det_en, false);
 891         property_enable(rphy->grf, &rport->port_cfg->ls_det_clr, true);
 892
 893         mutex_unlock(&rport->mutex);
 894
 895         /*
 896          * In this case for host phy port, a new device is plugged in,
 897          * meanwhile, if the phy port is suspended, we need rearm the work to
 898          * resume it and mange its states; otherwise, we do nothing about that.
 899          */
 900         if (rport->suspended && rport->port_id == USB2PHY_PORT_HOST)
 901                 rockchip_usb2phy_sm_work(&rport->sm_work.work);
 902
 903         return IRQ_HANDLED;
 904 }
 905
 906 static irqreturn_t rockchip_usb2phy_bvalid_irq(int irq, void *data)
 907 {
 908         struct rockchip_usb2phy_port *rport = data;
 909         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 910
 911         if (!property_enabled(rphy->grf, &rport->port_cfg->bvalid_det_st))
 912                 return IRQ_NONE;
 913
 914         mutex_lock(&rport->mutex);
 915
 916         /* clear bvalid detect irq pending status */
 917         property_enable(rphy->grf, &rport->port_cfg->bvalid_det_clr, true);
 918
 919         mutex_unlock(&rport->mutex);
 920
 921         rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 922
 923         return IRQ_HANDLED;
 924 }
 925
 926 static irqreturn_t rockchip_usb2phy_otg_mux_irq(int irq, void *data)
 927 {
 928         struct rockchip_usb2phy_port *rport = data;
 929         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 930
 931         if (property_enabled(rphy->grf, &rport->port_cfg->bvalid_det_st))
 932                 return rockchip_usb2phy_bvalid_irq(irq, data);
 933         else
 934                 return IRQ_NONE;
 935 }
 936
 937 static int rockchip_usb2phy_host_port_init(struct rockchip_usb2phy *rphy,
 938                                            struct rockchip_usb2phy_port *rport,
 939                                            struct device_node *child_np)
 940 {
 941         int ret;
 942
 943         rport->port_id = USB2PHY_PORT_HOST;
 944         rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_HOST];
 945         rport->suspended = true;
 946
 947         mutex_init(&rport->mutex);
 948         INIT_DELAYED_WORK(&rport->sm_work, rockchip_usb2phy_sm_work);
 949
 950         rport->ls_irq = of_irq_get_byname(child_np, "linestate");
 951         if (rport->ls_irq < 0) {
 952                 dev_err(rphy->dev, "no linestate irq provided\n");
 953                 return rport->ls_irq;
 954         }
 955
 956         ret = devm_request_threaded_irq(rphy->dev, rport->ls_irq, NULL,
 957                                         rockchip_usb2phy_linestate_irq,
 958                                         IRQF_ONESHOT,
 959                                         "rockchip_usb2phy", rport);
 960         if (ret) {
 961                 dev_err(rphy->dev, "failed to request linestate irq handle\n");
 962                 return ret;
 963         }
 964
 965         return 0;
 966 }
 967
 968 static int rockchip_otg_event(struct notifier_block *nb,
 969                               unsigned long event, void *ptr)
 970 {
 971         struct rockchip_usb2phy_port *rport =
 972                 container_of(nb, struct rockchip_usb2phy_port, event_nb);
 973
 974         schedule_delayed_work(&rport->otg_sm_work, OTG_SCHEDULE_DELAY);
 975
 976         return NOTIFY_DONE;
 977 }
 978
 979 static int rockchip_usb2phy_otg_port_init(struct rockchip_usb2phy *rphy,
 980                                           struct rockchip_usb2phy_port *rport,
 981                                           struct device_node *child_np)
 982 {
 983         int ret;
 984
 985         rport->port_id = USB2PHY_PORT_OTG;
 986         rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_OTG];
 987         rport->state = OTG_STATE_UNDEFINED;
 988
 989         /*
 990          * set suspended flag to true, but actually don't
 991          * put phy in suspend mode, it aims to enable usb
 992          * phy and clock in power_on() called by usb controller
 993          * driver during probe.
 994          */
 995         rport->suspended = true;
 996         rport->vbus_attached = false;
 997
 998         mutex_init(&rport->mutex);
 999
1000         rport->mode = of_usb_get_dr_mode_by_phy(child_np, -1);
1001         if (rport->mode == USB_DR_MODE_HOST ||
1002             rport->mode == USB_DR_MODE_UNKNOWN) {
1003                 ret = 0;
1004                 goto out;
1005         }
1006
1007         INIT_DELAYED_WORK(&rport->chg_work, rockchip_chg_detect_work);
1008         INIT_DELAYED_WORK(&rport->otg_sm_work, rockchip_usb2phy_otg_sm_work);
1009
1010         /*
1011          * Some SoCs use one interrupt with otg-id/otg-bvalid/linestate
1012          * interrupts muxed together, so probe the otg-mux interrupt first,
1013          * if not found, then look for the regular interrupts one by one.
1014          */
1015         rport->otg_mux_irq = of_irq_get_byname(child_np, "otg-mux");
1016         if (rport->otg_mux_irq > 0) {
1017                 ret = devm_request_threaded_irq(rphy->dev, rport->otg_mux_irq,
1018                                                 NULL,
1019                                                 rockchip_usb2phy_otg_mux_irq,
1020                                                 IRQF_ONESHOT,
1021                                                 "rockchip_usb2phy_otg",
1022                                                 rport);
1023                 if (ret) {
1024                         dev_err(rphy->dev,
1025                                 "failed to request otg-mux irq handle\n");
1026                         goto out;
1027                 }
1028         } else {
1029                 rport->bvalid_irq = of_irq_get_byname(child_np, "otg-bvalid");
1030                 if (rport->bvalid_irq < 0) {
1031                         dev_err(rphy->dev, "no vbus valid irq provided\n");
1032                         ret = rport->bvalid_irq;
1033                         goto out;
1034                 }
1035
1036                 ret = devm_request_threaded_irq(rphy->dev, rport->bvalid_irq,
1037                                                 NULL,
1038                                                 rockchip_usb2phy_bvalid_irq,
1039                                                 IRQF_ONESHOT,
1040                                                 "rockchip_usb2phy_bvalid",
1041                                                 rport);
1042                 if (ret) {
1043                         dev_err(rphy->dev,
1044                                 "failed to request otg-bvalid irq handle\n");
1045                         goto out;
1046                 }
1047         }
1048
1049         if (!IS_ERR(rphy->edev)) {
1050                 rport->event_nb.notifier_call = rockchip_otg_event;
1051
1052                 ret = devm_extcon_register_notifier(rphy->dev, rphy->edev,
1053                                         EXTCON_USB_HOST, &rport->event_nb);
1054                 if (ret)
1055                         dev_err(rphy->dev, "register USB HOST notifier failed\n");
1056         }
1057
1058 out:
1059         return ret;
1060 }
1061
1062 static int rockchip_usb2phy_probe(struct platform_device *pdev)
1063 {
1064         struct device *dev = &pdev->dev;
1065         struct device_node *np = dev->of_node;
1066         struct device_node *child_np;
1067         struct phy_provider *provider;
1068         struct rockchip_usb2phy *rphy;
1069         const struct rockchip_usb2phy_cfg *phy_cfgs;
1070         const struct of_device_id *match;
1071         unsigned int reg;
1072         int index, ret;
1073
1074         rphy = devm_kzalloc(dev, sizeof(*rphy), GFP_KERNEL);
1075         if (!rphy)
1076                 return -ENOMEM;
1077
1078         match = of_match_device(dev->driver->of_match_table, dev);
1079         if (!match || !match->data) {
1080                 dev_err(dev, "phy configs are not assigned!\n");
1081                 return -EINVAL;
1082         }
1083
1084         if (!dev->parent || !dev->parent->of_node)
1085                 return -EINVAL;
1086
1087         rphy->grf = syscon_node_to_regmap(dev->parent->of_node);
1088         if (IS_ERR(rphy->grf))
1089                 return PTR_ERR(rphy->grf);
1090
1091         if (of_device_is_compatible(np, "rockchip,rv1108-usb2phy")) {
1092                 rphy->usbgrf =
1093                         syscon_regmap_lookup_by_phandle(dev->of_node,
1094                                                         "rockchip,usbgrf");
1095                 if (IS_ERR(rphy->usbgrf))
1096                         return PTR_ERR(rphy->usbgrf);
1097         } else {
1098                 rphy->usbgrf = NULL;
1099         }
1100
1101         if (of_property_read_u32(np, "reg", &reg)) {
1102                 dev_err(dev, "the reg property is not assigned in %pOFn node\n",
1103                         np);
1104                 return -EINVAL;
1105         }
1106
1107         rphy->dev = dev;
1108         phy_cfgs = match->data;
1109         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
1110         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
1111         platform_set_drvdata(pdev, rphy);
1112
1113         ret = rockchip_usb2phy_extcon_register(rphy);
1114         if (ret)
1115                 return ret;
1116
1117         /* find out a proper config which can be matched with dt. */
1118         index = 0;
1119         while (phy_cfgs[index].reg) {
1120                 if (phy_cfgs[index].reg == reg) {
1121                         rphy->phy_cfg = &phy_cfgs[index];
1122                         break;
1123                 }
1124
1125                 ++index;
1126         }
1127
1128         if (!rphy->phy_cfg) {
1129                 dev_err(dev, "no phy-config can be matched with %pOFn node\n",
1130                         np);
1131                 return -EINVAL;
1132         }
1133
1134         rphy->clk = of_clk_get_by_name(np, "phyclk");
1135         if (!IS_ERR(rphy->clk)) {
1136                 clk_prepare_enable(rphy->clk);
1137         } else {
1138                 dev_info(&pdev->dev, "no phyclk specified\n");
1139                 rphy->clk = NULL;
1140         }
1141
1142         ret = rockchip_usb2phy_clk480m_register(rphy);
1143         if (ret) {
1144                 dev_err(dev, "failed to register 480m output clock\n");
1145                 goto disable_clks;
1146         }
1147
1148         index = 0;
1149         for_each_available_child_of_node(np, child_np) {
1150                 struct rockchip_usb2phy_port *rport = &rphy->ports[index];
1151                 struct phy *phy;
1152
1153                 /* This driver aims to support both otg-port and host-port */
1154                 if (!of_node_name_eq(child_np, "host-port") &&
1155                     !of_node_name_eq(child_np, "otg-port"))
1156                         goto next_child;
1157
1158                 phy = devm_phy_create(dev, child_np, &rockchip_usb2phy_ops);
1159                 if (IS_ERR(phy)) {
1160                         dev_err(dev, "failed to create phy\n");
1161                         ret = PTR_ERR(phy);
1162                         goto put_child;
1163                 }
1164
1165                 rport->phy = phy;
1166                 phy_set_drvdata(rport->phy, rport);
1167
1168                 /* initialize otg/host port separately */
1169                 if (of_node_name_eq(child_np, "host-port")) {
1170                         ret = rockchip_usb2phy_host_port_init(rphy, rport,
1171                                                               child_np);
1172                         if (ret)
1173                                 goto put_child;
1174                 } else {
1175                         ret = rockchip_usb2phy_otg_port_init(rphy, rport,
1176                                                              child_np);
1177                         if (ret)
1178                                 goto put_child;
1179                 }
1180
1181 next_child:
1182                 /* to prevent out of boundary */
1183                 if (++index >= rphy->phy_cfg->num_ports)
1184                         break;
1185         }
1186
1187         provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
1188         return PTR_ERR_OR_ZERO(provider);
1189
1190 put_child:
1191         of_node_put(child_np);
1192 disable_clks:
1193         if (rphy->clk) {
1194                 clk_disable_unprepare(rphy->clk);
1195                 clk_put(rphy->clk);
1196         }
1197         return ret;
1198 }
1199
1200 static const struct rockchip_usb2phy_cfg rk3228_phy_cfgs[] = {
1201         {
1202                 .reg = 0x760,
1203                 .num_ports      = 2,
1204                 .clkout_ctl     = { 0x0768, 4, 4, 1, 0 },
1205                 .port_cfgs      = {
1206                         [USB2PHY_PORT_OTG] = {
1207                                 .phy_sus        = { 0x0760, 15, 0, 0, 0x1d1 },
1208                                 .bvalid_det_en  = { 0x0680, 3, 3, 0, 1 },
1209                                 .bvalid_det_st  = { 0x0690, 3, 3, 0, 1 },
1210                                 .bvalid_det_clr = { 0x06a0, 3, 3, 0, 1 },
1211                                 .ls_det_en      = { 0x0680, 2, 2, 0, 1 },
1212                                 .ls_det_st      = { 0x0690, 2, 2, 0, 1 },
1213                                 .ls_det_clr     = { 0x06a0, 2, 2, 0, 1 },
1214                                 .utmi_bvalid    = { 0x0480, 4, 4, 0, 1 },
1215                                 .utmi_ls        = { 0x0480, 3, 2, 0, 1 },
1216                         },
1217                         [USB2PHY_PORT_HOST] = {
1218                                 .phy_sus        = { 0x0764, 15, 0, 0, 0x1d1 },
1219                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1220                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1221                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 }
1222                         }
1223                 },
1224                 .chg_det = {
1225                         .opmode         = { 0x0760, 3, 0, 5, 1 },
1226                         .cp_det         = { 0x0884, 4, 4, 0, 1 },
1227                         .dcp_det        = { 0x0884, 3, 3, 0, 1 },
1228                         .dp_det         = { 0x0884, 5, 5, 0, 1 },
1229                         .idm_sink_en    = { 0x0768, 8, 8, 0, 1 },
1230                         .idp_sink_en    = { 0x0768, 7, 7, 0, 1 },
1231                         .idp_src_en     = { 0x0768, 9, 9, 0, 1 },
1232                         .rdm_pdwn_en    = { 0x0768, 10, 10, 0, 1 },
1233                         .vdm_src_en     = { 0x0768, 12, 12, 0, 1 },
1234                         .vdp_src_en     = { 0x0768, 11, 11, 0, 1 },
1235                 },
1236         },
1237         {
1238                 .reg = 0x800,
1239                 .num_ports      = 2,
1240                 .clkout_ctl     = { 0x0808, 4, 4, 1, 0 },
1241                 .port_cfgs      = {
1242                         [USB2PHY_PORT_OTG] = {
1243                                 .phy_sus        = { 0x800, 15, 0, 0, 0x1d1 },
1244                                 .ls_det_en      = { 0x0684, 0, 0, 0, 1 },
1245                                 .ls_det_st      = { 0x0694, 0, 0, 0, 1 },
1246                                 .ls_det_clr     = { 0x06a4, 0, 0, 0, 1 }
1247                         },
1248                         [USB2PHY_PORT_HOST] = {
1249                                 .phy_sus        = { 0x804, 15, 0, 0, 0x1d1 },
1250                                 .ls_det_en      = { 0x0684, 1, 1, 0, 1 },
1251                                 .ls_det_st      = { 0x0694, 1, 1, 0, 1 },
1252                                 .ls_det_clr     = { 0x06a4, 1, 1, 0, 1 }
1253                         }
1254                 },
1255         },
1256         { /* sentinel */ }
1257 };
1258
1259 static const struct rockchip_usb2phy_cfg rk3328_phy_cfgs[] = {
1260         {
1261                 .reg = 0x100,
1262                 .num_ports      = 2,
1263                 .clkout_ctl     = { 0x108, 4, 4, 1, 0 },
1264                 .port_cfgs      = {
1265                         [USB2PHY_PORT_OTG] = {
1266                                 .phy_sus        = { 0x0100, 15, 0, 0, 0x1d1 },
1267                                 .bvalid_det_en  = { 0x0110, 2, 2, 0, 1 },
1268                                 .bvalid_det_st  = { 0x0114, 2, 2, 0, 1 },
1269                                 .bvalid_det_clr = { 0x0118, 2, 2, 0, 1 },
1270                                 .ls_det_en      = { 0x0110, 0, 0, 0, 1 },
1271                                 .ls_det_st      = { 0x0114, 0, 0, 0, 1 },
1272                                 .ls_det_clr     = { 0x0118, 0, 0, 0, 1 },
1273                                 .utmi_avalid    = { 0x0120, 10, 10, 0, 1 },
1274                                 .utmi_bvalid    = { 0x0120, 9, 9, 0, 1 },
1275                                 .utmi_ls        = { 0x0120, 5, 4, 0, 1 },
1276                         },
1277                         [USB2PHY_PORT_HOST] = {
1278                                 .phy_sus        = { 0x104, 15, 0, 0, 0x1d1 },
1279                                 .ls_det_en      = { 0x110, 1, 1, 0, 1 },
1280                                 .ls_det_st      = { 0x114, 1, 1, 0, 1 },
1281                                 .ls_det_clr     = { 0x118, 1, 1, 0, 1 },
1282                                 .utmi_ls        = { 0x120, 17, 16, 0, 1 },
1283                                 .utmi_hstdet    = { 0x120, 19, 19, 0, 1 }
1284                         }
1285                 },
1286                 .chg_det = {
1287                         .opmode         = { 0x0100, 3, 0, 5, 1 },
1288                         .cp_det         = { 0x0120, 24, 24, 0, 1 },
1289                         .dcp_det        = { 0x0120, 23, 23, 0, 1 },
1290                         .dp_det         = { 0x0120, 25, 25, 0, 1 },
1291                         .idm_sink_en    = { 0x0108, 8, 8, 0, 1 },
1292                         .idp_sink_en    = { 0x0108, 7, 7, 0, 1 },
1293                         .idp_src_en     = { 0x0108, 9, 9, 0, 1 },
1294                         .rdm_pdwn_en    = { 0x0108, 10, 10, 0, 1 },
1295                         .vdm_src_en     = { 0x0108, 12, 12, 0, 1 },
1296                         .vdp_src_en     = { 0x0108, 11, 11, 0, 1 },
1297                 },
1298         },
1299         { /* sentinel */ }
1300 };
1301
1302 static const struct rockchip_usb2phy_cfg rk3366_phy_cfgs[] = {
1303         {
1304                 .reg = 0x700,
1305                 .num_ports      = 2,
1306                 .clkout_ctl     = { 0x0724, 15, 15, 1, 0 },
1307                 .port_cfgs      = {
1308                         [USB2PHY_PORT_HOST] = {
1309                                 .phy_sus        = { 0x0728, 15, 0, 0, 0x1d1 },
1310                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1311                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1312                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 },
1313                                 .utmi_ls        = { 0x049c, 14, 13, 0, 1 },
1314                                 .utmi_hstdet    = { 0x049c, 12, 12, 0, 1 }
1315                         }
1316                 },
1317         },
1318         { /* sentinel */ }
1319 };
1320
1321 static const struct rockchip_usb2phy_cfg rk3399_phy_cfgs[] = {
1322         {
1323                 .reg            = 0xe450,
1324                 .num_ports      = 2,
1325                 .clkout_ctl     = { 0xe450, 4, 4, 1, 0 },
1326                 .port_cfgs      = {
1327                         [USB2PHY_PORT_OTG] = {
1328                                 .phy_sus        = { 0xe454, 1, 0, 2, 1 },
1329                                 .bvalid_det_en  = { 0xe3c0, 3, 3, 0, 1 },
1330                                 .bvalid_det_st  = { 0xe3e0, 3, 3, 0, 1 },
1331                                 .bvalid_det_clr = { 0xe3d0, 3, 3, 0, 1 },
1332                                 .utmi_avalid    = { 0xe2ac, 7, 7, 0, 1 },
1333                                 .utmi_bvalid    = { 0xe2ac, 12, 12, 0, 1 },
1334                         },
1335                         [USB2PHY_PORT_HOST] = {
1336                                 .phy_sus        = { 0xe458, 1, 0, 0x2, 0x1 },
1337                                 .ls_det_en      = { 0xe3c0, 6, 6, 0, 1 },
1338                                 .ls_det_st      = { 0xe3e0, 6, 6, 0, 1 },
1339                                 .ls_det_clr     = { 0xe3d0, 6, 6, 0, 1 },
1340                                 .utmi_ls        = { 0xe2ac, 22, 21, 0, 1 },
1341                                 .utmi_hstdet    = { 0xe2ac, 23, 23, 0, 1 }
1342                         }
1343                 },
1344                 .chg_det = {
1345                         .opmode         = { 0xe454, 3, 0, 5, 1 },
1346                         .cp_det         = { 0xe2ac, 2, 2, 0, 1 },
1347                         .dcp_det        = { 0xe2ac, 1, 1, 0, 1 },
1348                         .dp_det         = { 0xe2ac, 0, 0, 0, 1 },
1349                         .idm_sink_en    = { 0xe450, 8, 8, 0, 1 },
1350                         .idp_sink_en    = { 0xe450, 7, 7, 0, 1 },
1351                         .idp_src_en     = { 0xe450, 9, 9, 0, 1 },
1352                         .rdm_pdwn_en    = { 0xe450, 10, 10, 0, 1 },
1353                         .vdm_src_en     = { 0xe450, 12, 12, 0, 1 },
1354                         .vdp_src_en     = { 0xe450, 11, 11, 0, 1 },
1355                 },
1356         },
1357         {
1358                 .reg            = 0xe460,
1359                 .num_ports      = 2,
1360                 .clkout_ctl     = { 0xe460, 4, 4, 1, 0 },
1361                 .port_cfgs      = {
1362                         [USB2PHY_PORT_OTG] = {
1363                                 .phy_sus        = { 0xe464, 1, 0, 2, 1 },
1364                                 .bvalid_det_en  = { 0xe3c0, 8, 8, 0, 1 },
1365                                 .bvalid_det_st  = { 0xe3e0, 8, 8, 0, 1 },
1366                                 .bvalid_det_clr = { 0xe3d0, 8, 8, 0, 1 },
1367                                 .utmi_avalid    = { 0xe2ac, 10, 10, 0, 1 },
1368                                 .utmi_bvalid    = { 0xe2ac, 16, 16, 0, 1 },
1369                         },
1370                         [USB2PHY_PORT_HOST] = {
1371                                 .phy_sus        = { 0xe468, 1, 0, 0x2, 0x1 },
1372                                 .ls_det_en      = { 0xe3c0, 11, 11, 0, 1 },
1373                                 .ls_det_st      = { 0xe3e0, 11, 11, 0, 1 },
1374                                 .ls_det_clr     = { 0xe3d0, 11, 11, 0, 1 },
1375                                 .utmi_ls        = { 0xe2ac, 26, 25, 0, 1 },
1376                                 .utmi_hstdet    = { 0xe2ac, 27, 27, 0, 1 }
1377                         }
1378                 },
1379         },
1380         { /* sentinel */ }
1381 };
1382
1383 static const struct rockchip_usb2phy_cfg rv1108_phy_cfgs[] = {
1384         {
1385                 .reg = 0x100,
1386                 .num_ports      = 2,
1387                 .clkout_ctl     = { 0x108, 4, 4, 1, 0 },
1388                 .port_cfgs      = {
1389                         [USB2PHY_PORT_OTG] = {
1390                                 .phy_sus        = { 0x0100, 15, 0, 0, 0x1d1 },
1391                                 .bvalid_det_en  = { 0x0680, 3, 3, 0, 1 },
1392                                 .bvalid_det_st  = { 0x0690, 3, 3, 0, 1 },
1393                                 .bvalid_det_clr = { 0x06a0, 3, 3, 0, 1 },
1394                                 .ls_det_en      = { 0x0680, 2, 2, 0, 1 },
1395                                 .ls_det_st      = { 0x0690, 2, 2, 0, 1 },
1396                                 .ls_det_clr     = { 0x06a0, 2, 2, 0, 1 },
1397                                 .utmi_bvalid    = { 0x0804, 10, 10, 0, 1 },
1398                                 .utmi_ls        = { 0x0804, 13, 12, 0, 1 },
1399                         },
1400                         [USB2PHY_PORT_HOST] = {
1401                                 .phy_sus        = { 0x0104, 15, 0, 0, 0x1d1 },
1402                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1403                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1404                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 },
1405                                 .utmi_ls        = { 0x0804, 9, 8, 0, 1 },
1406                                 .utmi_hstdet    = { 0x0804, 7, 7, 0, 1 }
1407                         }
1408                 },
1409                 .chg_det = {
1410                         .opmode         = { 0x0100, 3, 0, 5, 1 },
1411                         .cp_det         = { 0x0804, 1, 1, 0, 1 },
1412                         .dcp_det        = { 0x0804, 0, 0, 0, 1 },
1413                         .dp_det         = { 0x0804, 2, 2, 0, 1 },
1414                         .idm_sink_en    = { 0x0108, 8, 8, 0, 1 },
1415                         .idp_sink_en    = { 0x0108, 7, 7, 0, 1 },
1416                         .idp_src_en     = { 0x0108, 9, 9, 0, 1 },
1417                         .rdm_pdwn_en    = { 0x0108, 10, 10, 0, 1 },
1418                         .vdm_src_en     = { 0x0108, 12, 12, 0, 1 },
1419                         .vdp_src_en     = { 0x0108, 11, 11, 0, 1 },
1420                 },
1421         },
1422         { /* sentinel */ }
1423 };
1424
1425 static const struct of_device_id rockchip_usb2phy_dt_match[] = {
1426         { .compatible = "rockchip,rk3228-usb2phy", .data = &rk3228_phy_cfgs },
1427         { .compatible = "rockchip,rk3328-usb2phy", .data = &rk3328_phy_cfgs },
1428         { .compatible = "rockchip,rk3366-usb2phy", .data = &rk3366_phy_cfgs },
1429         { .compatible = "rockchip,rk3399-usb2phy", .data = &rk3399_phy_cfgs },
1430         { .compatible = "rockchip,rv1108-usb2phy", .data = &rv1108_phy_cfgs },
1431         {}
1432 };
1433 MODULE_DEVICE_TABLE(of, rockchip_usb2phy_dt_match);
1434
1435 static struct platform_driver rockchip_usb2phy_driver = {
1436         .probe          = rockchip_usb2phy_probe,
1437         .driver         = {
1438                 .name   = "rockchip-usb2phy",
1439                 .of_match_table = rockchip_usb2phy_dt_match,
1440         },
1441 };
1442 module_platform_driver(rockchip_usb2phy_driver);
1443
1444 MODULE_AUTHOR("Frank Wang <frank.wang@rock-chips.com>");
1445 MODULE_DESCRIPTION("Rockchip USB2.0 PHY driver");
1446 MODULE_LICENSE("GPL v2");