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

   1 /*
   2  * Rockchip USB2.0 PHY with Innosilicon IP block driver
   3  *
   4  * Copyright (C) 2016 Fuzhou Rockchip Electronics Co., Ltd
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/clk.h>
  18 #include <linux/clk-provider.h>
  19 #include <linux/delay.h>
  20 #include <linux/extcon-provider.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/io.h>
  23 #include <linux/gpio/consumer.h>
  24 #include <linux/jiffies.h>
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/mutex.h>
  28 #include <linux/of.h>
  29 #include <linux/of_address.h>
  30 #include <linux/of_irq.h>
  31 #include <linux/of_platform.h>
  32 #include <linux/phy/phy.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/power_supply.h>
  35 #include <linux/regmap.h>
  36 #include <linux/mfd/syscon.h>
  37 #include <linux/usb/of.h>
  38 #include <linux/usb/otg.h>
  39
  40 #define BIT_WRITEABLE_SHIFT     16
  41 #define SCHEDULE_DELAY          (60 * HZ)
  42 #define OTG_SCHEDULE_DELAY      (2 * HZ)
  43
  44 enum rockchip_usb2phy_port_id {
  45         USB2PHY_PORT_OTG,
  46         USB2PHY_PORT_HOST,
  47         USB2PHY_NUM_PORTS,
  48 };
  49
  50 enum rockchip_usb2phy_host_state {
  51         PHY_STATE_HS_ONLINE     = 0,
  52         PHY_STATE_DISCONNECT    = 1,
  53         PHY_STATE_CONNECT       = 2,
  54         PHY_STATE_FS_LS_ONLINE  = 4,
  55 };
  56
  57 /**
  58  * Different states involved in USB charger detection.
  59  * USB_CHG_STATE_UNDEFINED      USB charger is not connected or detection
  60  *                              process is not yet started.
  61  * USB_CHG_STATE_WAIT_FOR_DCD   Waiting for Data pins contact.
  62  * USB_CHG_STATE_DCD_DONE       Data pin contact is detected.
  63  * USB_CHG_STATE_PRIMARY_DONE   Primary detection is completed (Detects
  64  *                              between SDP and DCP/CDP).
  65  * USB_CHG_STATE_SECONDARY_DONE Secondary detection is completed (Detects
  66  *                              between DCP and CDP).
  67  * USB_CHG_STATE_DETECTED       USB charger type is determined.
  68  */
  69 enum usb_chg_state {
  70         USB_CHG_STATE_UNDEFINED = 0,
  71         USB_CHG_STATE_WAIT_FOR_DCD,
  72         USB_CHG_STATE_DCD_DONE,
  73         USB_CHG_STATE_PRIMARY_DONE,
  74         USB_CHG_STATE_SECONDARY_DONE,
  75         USB_CHG_STATE_DETECTED,
  76 };
  77
  78 static const unsigned int rockchip_usb2phy_extcon_cable[] = {
  79         EXTCON_USB,
  80         EXTCON_USB_HOST,
  81         EXTCON_CHG_USB_SDP,
  82         EXTCON_CHG_USB_CDP,
  83         EXTCON_CHG_USB_DCP,
  84         EXTCON_CHG_USB_SLOW,
  85         EXTCON_NONE,
  86 };
  87
  88 struct usb2phy_reg {
  89         unsigned int    offset;
  90         unsigned int    bitend;
  91         unsigned int    bitstart;
  92         unsigned int    disable;
  93         unsigned int    enable;
  94 };
  95
  96 /**
  97  * struct rockchip_chg_det_reg: usb charger detect registers
  98  * @cp_det: charging port detected successfully.
  99  * @dcp_det: dedicated charging port detected successfully.
 100  * @dp_det: assert data pin connect successfully.
 101  * @idm_sink_en: open dm sink curren.
 102  * @idp_sink_en: open dp sink current.
 103  * @idp_src_en: open dm source current.
 104  * @rdm_pdwn_en: open dm pull down resistor.
 105  * @vdm_src_en: open dm voltage source.
 106  * @vdp_src_en: open dp voltage source.
 107  * @opmode: utmi operational mode.
 108  */
 109 struct rockchip_chg_det_reg {
 110         struct usb2phy_reg      cp_det;
 111         struct usb2phy_reg      dcp_det;
 112         struct usb2phy_reg      dp_det;
 113         struct usb2phy_reg      idm_sink_en;
 114         struct usb2phy_reg      idp_sink_en;
 115         struct usb2phy_reg      idp_src_en;
 116         struct usb2phy_reg      rdm_pdwn_en;
 117         struct usb2phy_reg      vdm_src_en;
 118         struct usb2phy_reg      vdp_src_en;
 119         struct usb2phy_reg      opmode;
 120 };
 121
 122 /**
 123  * struct rockchip_usb2phy_port_cfg: usb-phy port configuration.
 124  * @phy_sus: phy suspend register.
 125  * @bvalid_det_en: vbus valid rise detection enable register.
 126  * @bvalid_det_st: vbus valid rise detection status register.
 127  * @bvalid_det_clr: vbus valid rise detection clear register.
 128  * @ls_det_en: linestate detection enable register.
 129  * @ls_det_st: linestate detection state register.
 130  * @ls_det_clr: linestate detection clear register.
 131  * @utmi_avalid: utmi vbus avalid status register.
 132  * @utmi_bvalid: utmi vbus bvalid status register.
 133  * @utmi_ls: utmi linestate state register.
 134  * @utmi_hstdet: utmi host disconnect register.
 135  */
 136 struct rockchip_usb2phy_port_cfg {
 137         struct usb2phy_reg      phy_sus;
 138         struct usb2phy_reg      bvalid_det_en;
 139         struct usb2phy_reg      bvalid_det_st;
 140         struct usb2phy_reg      bvalid_det_clr;
 141         struct usb2phy_reg      ls_det_en;
 142         struct usb2phy_reg      ls_det_st;
 143         struct usb2phy_reg      ls_det_clr;
 144         struct usb2phy_reg      utmi_avalid;
 145         struct usb2phy_reg      utmi_bvalid;
 146         struct usb2phy_reg      utmi_ls;
 147         struct usb2phy_reg      utmi_hstdet;
 148 };
 149
 150 /**
 151  * struct rockchip_usb2phy_cfg: usb-phy configuration.
 152  * @reg: the address offset of grf for usb-phy config.
 153  * @num_ports: specify how many ports that the phy has.
 154  * @clkout_ctl: keep on/turn off output clk of phy.
 155  * @chg_det: charger detection registers.
 156  */
 157 struct rockchip_usb2phy_cfg {
 158         unsigned int    reg;
 159         unsigned int    num_ports;
 160         struct usb2phy_reg      clkout_ctl;
 161         const struct rockchip_usb2phy_port_cfg  port_cfgs[USB2PHY_NUM_PORTS];
 162         const struct rockchip_chg_det_reg       chg_det;
 163 };
 164
 165 /**
 166  * struct rockchip_usb2phy_port: usb-phy port data.
 167  * @port_id: flag for otg port or host port.
 168  * @suspended: phy suspended flag.
 169  * @utmi_avalid: utmi avalid status usage flag.
 170  *      true    - use avalid to get vbus status
 171  *      flase   - use bvalid to get vbus status
 172  * @vbus_attached: otg device vbus status.
 173  * @bvalid_irq: IRQ number assigned for vbus valid rise detection.
 174  * @ls_irq: IRQ number assigned for linestate detection.
 175  * @otg_mux_irq: IRQ number which multiplex otg-id/otg-bvalid/linestate
 176  *               irqs to one irq in otg-port.
 177  * @mutex: for register updating in sm_work.
 178  * @chg_work: charge detect work.
 179  * @otg_sm_work: OTG state machine work.
 180  * @sm_work: HOST state machine work.
 181  * @phy_cfg: port register configuration, assigned by driver data.
 182  * @event_nb: hold event notification callback.
 183  * @state: define OTG enumeration states before device reset.
 184  * @mode: the dr_mode of the controller.
 185  */
 186 struct rockchip_usb2phy_port {
 187         struct phy      *phy;
 188         unsigned int    port_id;
 189         bool            suspended;
 190         bool            utmi_avalid;
 191         bool            vbus_attached;
 192         int             bvalid_irq;
 193         int             ls_irq;
 194         int             otg_mux_irq;
 195         struct mutex    mutex;
 196         struct          delayed_work chg_work;
 197         struct          delayed_work otg_sm_work;
 198         struct          delayed_work sm_work;
 199         const struct    rockchip_usb2phy_port_cfg *port_cfg;
 200         struct notifier_block   event_nb;
 201         enum usb_otg_state      state;
 202         enum usb_dr_mode        mode;
 203 };
 204
 205 /**
 206  * struct rockchip_usb2phy: usb2.0 phy driver data.
 207  * @grf: General Register Files regmap.
 208  * @usbgrf: USB General Register Files regmap.
 209  * @clk: clock struct of phy input clk.
 210  * @clk480m: clock struct of phy output clk.
 211  * @clk_hw: clock struct of phy output clk management.
 212  * @chg_state: states involved in USB charger detection.
 213  * @chg_type: USB charger types.
 214  * @dcd_retries: The retry count used to track Data contact
 215  *               detection process.
 216  * @edev: extcon device for notification registration
 217  * @phy_cfg: phy register configuration, assigned by driver data.
 218  * @ports: phy port instance.
 219  */
 220 struct rockchip_usb2phy {
 221         struct device   *dev;
 222         struct regmap   *grf;
 223         struct regmap   *usbgrf;
 224         struct clk      *clk;
 225         struct clk      *clk480m;
 226         struct clk_hw   clk480m_hw;
 227         enum usb_chg_state      chg_state;
 228         enum power_supply_type  chg_type;
 229         u8                      dcd_retries;
 230         struct extcon_dev       *edev;
 231         const struct rockchip_usb2phy_cfg       *phy_cfg;
 232         struct rockchip_usb2phy_port    ports[USB2PHY_NUM_PORTS];
 233 };
 234
 235 static inline struct regmap *get_reg_base(struct rockchip_usb2phy *rphy)
 236 {
 237         return rphy->usbgrf == NULL ? rphy->grf : rphy->usbgrf;
 238 }
 239
 240 static inline int property_enable(struct regmap *base,
 241                                   const struct usb2phy_reg *reg, bool en)
 242 {
 243         unsigned int val, mask, tmp;
 244
 245         tmp = en ? reg->enable : reg->disable;
 246         mask = GENMASK(reg->bitend, reg->bitstart);
 247         val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);
 248
 249         return regmap_write(base, reg->offset, val);
 250 }
 251
 252 static inline bool property_enabled(struct regmap *base,
 253                                     const struct usb2phy_reg *reg)
 254 {
 255         int ret;
 256         unsigned int tmp, orig;
 257         unsigned int mask = GENMASK(reg->bitend, reg->bitstart);
 258
 259         ret = regmap_read(base, reg->offset, &orig);
 260         if (ret)
 261                 return false;
 262
 263         tmp = (orig & mask) >> reg->bitstart;
 264         return tmp == reg->enable;
 265 }
 266
 267 static int rockchip_usb2phy_clk480m_prepare(struct clk_hw *hw)
 268 {
 269         struct rockchip_usb2phy *rphy =
 270                 container_of(hw, struct rockchip_usb2phy, clk480m_hw);
 271         struct regmap *base = get_reg_base(rphy);
 272         int ret;
 273
 274         /* turn on 480m clk output if it is off */
 275         if (!property_enabled(base, &rphy->phy_cfg->clkout_ctl)) {
 276                 ret = property_enable(base, &rphy->phy_cfg->clkout_ctl, true);
 277                 if (ret)
 278                         return ret;
 279
 280                 /* waiting for the clk become stable */
 281                 usleep_range(1200, 1300);
 282         }
 283
 284         return 0;
 285 }
 286
 287 static void rockchip_usb2phy_clk480m_unprepare(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         /* turn off 480m clk output */
 294         property_enable(base, &rphy->phy_cfg->clkout_ctl, false);
 295 }
 296
 297 static int rockchip_usb2phy_clk480m_prepared(struct clk_hw *hw)
 298 {
 299         struct rockchip_usb2phy *rphy =
 300                 container_of(hw, struct rockchip_usb2phy, clk480m_hw);
 301         struct regmap *base = get_reg_base(rphy);
 302
 303         return property_enabled(base, &rphy->phy_cfg->clkout_ctl);
 304 }
 305
 306 static unsigned long
 307 rockchip_usb2phy_clk480m_recalc_rate(struct clk_hw *hw,
 308                                      unsigned long parent_rate)
 309 {
 310         return 480000000;
 311 }
 312
 313 static const struct clk_ops rockchip_usb2phy_clkout_ops = {
 314         .prepare = rockchip_usb2phy_clk480m_prepare,
 315         .unprepare = rockchip_usb2phy_clk480m_unprepare,
 316         .is_prepared = rockchip_usb2phy_clk480m_prepared,
 317         .recalc_rate = rockchip_usb2phy_clk480m_recalc_rate,
 318 };
 319
 320 static void rockchip_usb2phy_clk480m_unregister(void *data)
 321 {
 322         struct rockchip_usb2phy *rphy = data;
 323
 324         of_clk_del_provider(rphy->dev->of_node);
 325         clk_unregister(rphy->clk480m);
 326 }
 327
 328 static int
 329 rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy)
 330 {
 331         struct device_node *node = rphy->dev->of_node;
 332         struct clk_init_data init;
 333         const char *clk_name;
 334         int ret;
 335
 336         init.flags = 0;
 337         init.name = "clk_usbphy_480m";
 338         init.ops = &rockchip_usb2phy_clkout_ops;
 339
 340         /* optional override of the clockname */
 341         of_property_read_string(node, "clock-output-names", &init.name);
 342
 343         if (rphy->clk) {
 344                 clk_name = __clk_get_name(rphy->clk);
 345                 init.parent_names = &clk_name;
 346                 init.num_parents = 1;
 347         } else {
 348                 init.parent_names = NULL;
 349                 init.num_parents = 0;
 350         }
 351
 352         rphy->clk480m_hw.init = &init;
 353
 354         /* register the clock */
 355         rphy->clk480m = clk_register(rphy->dev, &rphy->clk480m_hw);
 356         if (IS_ERR(rphy->clk480m)) {
 357                 ret = PTR_ERR(rphy->clk480m);
 358                 goto err_ret;
 359         }
 360
 361         ret = of_clk_add_provider(node, of_clk_src_simple_get, rphy->clk480m);
 362         if (ret < 0)
 363                 goto err_clk_provider;
 364
 365         ret = devm_add_action(rphy->dev, rockchip_usb2phy_clk480m_unregister,
 366                               rphy);
 367         if (ret < 0)
 368                 goto err_unreg_action;
 369
 370         return 0;
 371
 372 err_unreg_action:
 373         of_clk_del_provider(node);
 374 err_clk_provider:
 375         clk_unregister(rphy->clk480m);
 376 err_ret:
 377         return ret;
 378 }
 379
 380 static int rockchip_usb2phy_extcon_register(struct rockchip_usb2phy *rphy)
 381 {
 382         int ret;
 383         struct device_node *node = rphy->dev->of_node;
 384         struct extcon_dev *edev;
 385
 386         if (of_property_read_bool(node, "extcon")) {
 387                 edev = extcon_get_edev_by_phandle(rphy->dev, 0);
 388                 if (IS_ERR(edev)) {
 389                         if (PTR_ERR(edev) != -EPROBE_DEFER)
 390                                 dev_err(rphy->dev, "Invalid or missing extcon\n");
 391                         return PTR_ERR(edev);
 392                 }
 393         } else {
 394                 /* Initialize extcon device */
 395                 edev = devm_extcon_dev_allocate(rphy->dev,
 396                                                 rockchip_usb2phy_extcon_cable);
 397
 398                 if (IS_ERR(edev))
 399                         return -ENOMEM;
 400
 401                 ret = devm_extcon_dev_register(rphy->dev, edev);
 402                 if (ret) {
 403                         dev_err(rphy->dev, "failed to register extcon device\n");
 404                         return ret;
 405                 }
 406         }
 407
 408         rphy->edev = edev;
 409
 410         return 0;
 411 }
 412
 413 static int rockchip_usb2phy_init(struct phy *phy)
 414 {
 415         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 416         struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
 417         int ret = 0;
 418
 419         mutex_lock(&rport->mutex);
 420
 421         if (rport->port_id == USB2PHY_PORT_OTG) {
 422                 if (rport->mode != USB_DR_MODE_HOST &&
 423                     rport->mode != USB_DR_MODE_UNKNOWN) {
 424                         /* clear bvalid status and enable bvalid detect irq */
 425                         ret = property_enable(rphy->grf,
 426                                               &rport->port_cfg->bvalid_det_clr,
 427                                               true);
 428                         if (ret)
 429                                 goto out;
 430
 431                         ret = property_enable(rphy->grf,
 432                                               &rport->port_cfg->bvalid_det_en,
 433                                               true);
 434                         if (ret)
 435                                 goto out;
 436
 437                         schedule_delayed_work(&rport->otg_sm_work,
 438                                               OTG_SCHEDULE_DELAY * 3);
 439                 } else {
 440                         /* If OTG works in host only mode, do nothing. */
 441                         dev_dbg(&rport->phy->dev, "mode %d\n", rport->mode);
 442                 }
 443         } else if (rport->port_id == USB2PHY_PORT_HOST) {
 444                 /* clear linestate and enable linestate detect irq */
 445                 ret = property_enable(rphy->grf,
 446                                       &rport->port_cfg->ls_det_clr, true);
 447                 if (ret)
 448                         goto out;
 449
 450                 ret = property_enable(rphy->grf,
 451                                       &rport->port_cfg->ls_det_en, true);
 452                 if (ret)
 453                         goto out;
 454
 455                 schedule_delayed_work(&rport->sm_work, SCHEDULE_DELAY);
 456         }
 457
 458 out:
 459         mutex_unlock(&rport->mutex);
 460         return ret;
 461 }
 462
 463 static int rockchip_usb2phy_power_on(struct phy *phy)
 464 {
 465         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 466         struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
 467         struct regmap *base = get_reg_base(rphy);
 468         int ret;
 469
 470         dev_dbg(&rport->phy->dev, "port power on\n");
 471
 472         if (!rport->suspended)
 473                 return 0;
 474
 475         ret = clk_prepare_enable(rphy->clk480m);
 476         if (ret)
 477                 return ret;
 478
 479         ret = property_enable(base, &rport->port_cfg->phy_sus, false);
 480         if (ret)
 481                 return ret;
 482
 483         /* waiting for the utmi_clk to become stable */
 484         usleep_range(1500, 2000);
 485
 486         rport->suspended = false;
 487         return 0;
 488 }
 489
 490 static int rockchip_usb2phy_power_off(struct phy *phy)
 491 {
 492         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 493         struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
 494         struct regmap *base = get_reg_base(rphy);
 495         int ret;
 496
 497         dev_dbg(&rport->phy->dev, "port power off\n");
 498
 499         if (rport->suspended)
 500                 return 0;
 501
 502         ret = property_enable(base, &rport->port_cfg->phy_sus, true);
 503         if (ret)
 504                 return ret;
 505
 506         rport->suspended = true;
 507         clk_disable_unprepare(rphy->clk480m);
 508
 509         return 0;
 510 }
 511
 512 static int rockchip_usb2phy_exit(struct phy *phy)
 513 {
 514         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 515
 516         if (rport->port_id == USB2PHY_PORT_OTG &&
 517             rport->mode != USB_DR_MODE_HOST &&
 518             rport->mode != USB_DR_MODE_UNKNOWN) {
 519                 cancel_delayed_work_sync(&rport->otg_sm_work);
 520                 cancel_delayed_work_sync(&rport->chg_work);
 521         } else if (rport->port_id == USB2PHY_PORT_HOST)
 522                 cancel_delayed_work_sync(&rport->sm_work);
 523
 524         return 0;
 525 }
 526
 527 static const struct phy_ops rockchip_usb2phy_ops = {
 528         .init           = rockchip_usb2phy_init,
 529         .exit           = rockchip_usb2phy_exit,
 530         .power_on       = rockchip_usb2phy_power_on,
 531         .power_off      = rockchip_usb2phy_power_off,
 532         .owner          = THIS_MODULE,
 533 };
 534
 535 static void rockchip_usb2phy_otg_sm_work(struct work_struct *work)
 536 {
 537         struct rockchip_usb2phy_port *rport =
 538                 container_of(work, struct rockchip_usb2phy_port,
 539                              otg_sm_work.work);
 540         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 541         static unsigned int cable;
 542         unsigned long delay;
 543         bool vbus_attach, sch_work, notify_charger;
 544
 545         if (rport->utmi_avalid)
 546                 vbus_attach = property_enabled(rphy->grf,
 547                                                &rport->port_cfg->utmi_avalid);
 548         else
 549                 vbus_attach = property_enabled(rphy->grf,
 550                                                &rport->port_cfg->utmi_bvalid);
 551
 552         sch_work = false;
 553         notify_charger = false;
 554         delay = OTG_SCHEDULE_DELAY;
 555         dev_dbg(&rport->phy->dev, "%s otg sm work\n",
 556                 usb_otg_state_string(rport->state));
 557
 558         switch (rport->state) {
 559         case OTG_STATE_UNDEFINED:
 560                 rport->state = OTG_STATE_B_IDLE;
 561                 if (!vbus_attach)
 562                         rockchip_usb2phy_power_off(rport->phy);
 563                 /* fall through */
 564         case OTG_STATE_B_IDLE:
 565                 if (extcon_get_state(rphy->edev, EXTCON_USB_HOST) > 0) {
 566                         dev_dbg(&rport->phy->dev, "usb otg host connect\n");
 567                         rport->state = OTG_STATE_A_HOST;
 568                         rockchip_usb2phy_power_on(rport->phy);
 569                         return;
 570                 } else if (vbus_attach) {
 571                         dev_dbg(&rport->phy->dev, "vbus_attach\n");
 572                         switch (rphy->chg_state) {
 573                         case USB_CHG_STATE_UNDEFINED:
 574                                 schedule_delayed_work(&rport->chg_work, 0);
 575                                 return;
 576                         case USB_CHG_STATE_DETECTED:
 577                                 switch (rphy->chg_type) {
 578                                 case POWER_SUPPLY_TYPE_USB:
 579                                         dev_dbg(&rport->phy->dev, "sdp cable is connected\n");
 580                                         rockchip_usb2phy_power_on(rport->phy);
 581                                         rport->state = OTG_STATE_B_PERIPHERAL;
 582                                         notify_charger = true;
 583                                         sch_work = true;
 584                                         cable = EXTCON_CHG_USB_SDP;
 585                                         break;
 586                                 case POWER_SUPPLY_TYPE_USB_DCP:
 587                                         dev_dbg(&rport->phy->dev, "dcp cable is connected\n");
 588                                         rockchip_usb2phy_power_off(rport->phy);
 589                                         notify_charger = true;
 590                                         sch_work = true;
 591                                         cable = EXTCON_CHG_USB_DCP;
 592                                         break;
 593                                 case POWER_SUPPLY_TYPE_USB_CDP:
 594                                         dev_dbg(&rport->phy->dev, "cdp cable is connected\n");
 595                                         rockchip_usb2phy_power_on(rport->phy);
 596                                         rport->state = OTG_STATE_B_PERIPHERAL;
 597                                         notify_charger = true;
 598                                         sch_work = true;
 599                                         cable = EXTCON_CHG_USB_CDP;
 600                                         break;
 601                                 default:
 602                                         break;
 603                                 }
 604                                 break;
 605                         default:
 606                                 break;
 607                         }
 608                 } else {
 609                         notify_charger = true;
 610                         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
 611                         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
 612                 }
 613
 614                 if (rport->vbus_attached != vbus_attach) {
 615                         rport->vbus_attached = vbus_attach;
 616
 617                         if (notify_charger && rphy->edev) {
 618                                 extcon_set_state_sync(rphy->edev,
 619                                                         cable, vbus_attach);
 620                                 if (cable == EXTCON_CHG_USB_SDP)
 621                                         extcon_set_state_sync(rphy->edev,
 622                                                               EXTCON_USB,
 623                                                               vbus_attach);
 624                         }
 625                 }
 626                 break;
 627         case OTG_STATE_B_PERIPHERAL:
 628                 if (!vbus_attach) {
 629                         dev_dbg(&rport->phy->dev, "usb disconnect\n");
 630                         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
 631                         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
 632                         rport->state = OTG_STATE_B_IDLE;
 633                         delay = 0;
 634                         rockchip_usb2phy_power_off(rport->phy);
 635                 }
 636                 sch_work = true;
 637                 break;
 638         case OTG_STATE_A_HOST:
 639                 if (extcon_get_state(rphy->edev, EXTCON_USB_HOST) == 0) {
 640                         dev_dbg(&rport->phy->dev, "usb otg host disconnect\n");
 641                         rport->state = OTG_STATE_B_IDLE;
 642                         rockchip_usb2phy_power_off(rport->phy);
 643                 }
 644                 break;
 645         default:
 646                 break;
 647         }
 648
 649         if (sch_work)
 650                 schedule_delayed_work(&rport->otg_sm_work, delay);
 651 }
 652
 653 static const char *chg_to_string(enum power_supply_type chg_type)
 654 {
 655         switch (chg_type) {
 656         case POWER_SUPPLY_TYPE_USB:
 657                 return "USB_SDP_CHARGER";
 658         case POWER_SUPPLY_TYPE_USB_DCP:
 659                 return "USB_DCP_CHARGER";
 660         case POWER_SUPPLY_TYPE_USB_CDP:
 661                 return "USB_CDP_CHARGER";
 662         default:
 663                 return "INVALID_CHARGER";
 664         }
 665 }
 666
 667 static void rockchip_chg_enable_dcd(struct rockchip_usb2phy *rphy,
 668                                     bool en)
 669 {
 670         struct regmap *base = get_reg_base(rphy);
 671
 672         property_enable(base, &rphy->phy_cfg->chg_det.rdm_pdwn_en, en);
 673         property_enable(base, &rphy->phy_cfg->chg_det.idp_src_en, en);
 674 }
 675
 676 static void rockchip_chg_enable_primary_det(struct rockchip_usb2phy *rphy,
 677                                             bool en)
 678 {
 679         struct regmap *base = get_reg_base(rphy);
 680
 681         property_enable(base, &rphy->phy_cfg->chg_det.vdp_src_en, en);
 682         property_enable(base, &rphy->phy_cfg->chg_det.idm_sink_en, en);
 683 }
 684
 685 static void rockchip_chg_enable_secondary_det(struct rockchip_usb2phy *rphy,
 686                                               bool en)
 687 {
 688         struct regmap *base = get_reg_base(rphy);
 689
 690         property_enable(base, &rphy->phy_cfg->chg_det.vdm_src_en, en);
 691         property_enable(base, &rphy->phy_cfg->chg_det.idp_sink_en, en);
 692 }
 693
 694 #define CHG_DCD_POLL_TIME       (100 * HZ / 1000)
 695 #define CHG_DCD_MAX_RETRIES     6
 696 #define CHG_PRIMARY_DET_TIME    (40 * HZ / 1000)
 697 #define CHG_SECONDARY_DET_TIME  (40 * HZ / 1000)
 698 static void rockchip_chg_detect_work(struct work_struct *work)
 699 {
 700         struct rockchip_usb2phy_port *rport =
 701                 container_of(work, struct rockchip_usb2phy_port, chg_work.work);
 702         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 703         struct regmap *base = get_reg_base(rphy);
 704         bool is_dcd, tmout, vout;
 705         unsigned long delay;
 706
 707         dev_dbg(&rport->phy->dev, "chg detection work state = %d\n",
 708                 rphy->chg_state);
 709         switch (rphy->chg_state) {
 710         case USB_CHG_STATE_UNDEFINED:
 711                 if (!rport->suspended)
 712                         rockchip_usb2phy_power_off(rport->phy);
 713                 /* put the controller in non-driving mode */
 714                 property_enable(base, &rphy->phy_cfg->chg_det.opmode, false);
 715                 /* Start DCD processing stage 1 */
 716                 rockchip_chg_enable_dcd(rphy, true);
 717                 rphy->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
 718                 rphy->dcd_retries = 0;
 719                 delay = CHG_DCD_POLL_TIME;
 720                 break;
 721         case USB_CHG_STATE_WAIT_FOR_DCD:
 722                 /* get data contact detection status */
 723                 is_dcd = property_enabled(rphy->grf,
 724                                           &rphy->phy_cfg->chg_det.dp_det);
 725                 tmout = ++rphy->dcd_retries == CHG_DCD_MAX_RETRIES;
 726                 /* stage 2 */
 727                 if (is_dcd || tmout) {
 728                         /* stage 4 */
 729                         /* Turn off DCD circuitry */
 730                         rockchip_chg_enable_dcd(rphy, false);
 731                         /* Voltage Source on DP, Probe on DM */
 732                         rockchip_chg_enable_primary_det(rphy, true);
 733                         delay = CHG_PRIMARY_DET_TIME;
 734                         rphy->chg_state = USB_CHG_STATE_DCD_DONE;
 735                 } else {
 736                         /* stage 3 */
 737                         delay = CHG_DCD_POLL_TIME;
 738                 }
 739                 break;
 740         case USB_CHG_STATE_DCD_DONE:
 741                 vout = property_enabled(rphy->grf,
 742                                         &rphy->phy_cfg->chg_det.cp_det);
 743                 rockchip_chg_enable_primary_det(rphy, false);
 744                 if (vout) {
 745                         /* Voltage Source on DM, Probe on DP  */
 746                         rockchip_chg_enable_secondary_det(rphy, true);
 747                         delay = CHG_SECONDARY_DET_TIME;
 748                         rphy->chg_state = USB_CHG_STATE_PRIMARY_DONE;
 749                 } else {
 750                         if (rphy->dcd_retries == CHG_DCD_MAX_RETRIES) {
 751                                 /* floating charger found */
 752                                 rphy->chg_type = POWER_SUPPLY_TYPE_USB_DCP;
 753                                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 754                                 delay = 0;
 755                         } else {
 756                                 rphy->chg_type = POWER_SUPPLY_TYPE_USB;
 757                                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 758                                 delay = 0;
 759                         }
 760                 }
 761                 break;
 762         case USB_CHG_STATE_PRIMARY_DONE:
 763                 vout = property_enabled(rphy->grf,
 764                                         &rphy->phy_cfg->chg_det.dcp_det);
 765                 /* Turn off voltage source */
 766                 rockchip_chg_enable_secondary_det(rphy, false);
 767                 if (vout)
 768                         rphy->chg_type = POWER_SUPPLY_TYPE_USB_DCP;
 769                 else
 770                         rphy->chg_type = POWER_SUPPLY_TYPE_USB_CDP;
 771                 /* fall through */
 772         case USB_CHG_STATE_SECONDARY_DONE:
 773                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 774                 delay = 0;
 775                 /* fall through */
 776         case USB_CHG_STATE_DETECTED:
 777                 /* put the controller in normal mode */
 778                 property_enable(base, &rphy->phy_cfg->chg_det.opmode, true);
 779                 rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 780                 dev_info(&rport->phy->dev, "charger = %s\n",
 781                          chg_to_string(rphy->chg_type));
 782                 return;
 783         default:
 784                 return;
 785         }
 786
 787         schedule_delayed_work(&rport->chg_work, delay);
 788 }
 789
 790 /*
 791  * The function manage host-phy port state and suspend/resume phy port
 792  * to save power.
 793  *
 794  * we rely on utmi_linestate and utmi_hostdisconnect to identify whether
 795  * devices is disconnect or not. Besides, we do not need care it is FS/LS
 796  * disconnected or HS disconnected, actually, we just only need get the
 797  * device is disconnected at last through rearm the delayed work,
 798  * to suspend the phy port in _PHY_STATE_DISCONNECT_ case.
 799  *
 800  * NOTE: It may invoke *phy_powr_off or *phy_power_on which will invoke
 801  * some clk related APIs, so do not invoke it from interrupt context directly.
 802  */
 803 static void rockchip_usb2phy_sm_work(struct work_struct *work)
 804 {
 805         struct rockchip_usb2phy_port *rport =
 806                 container_of(work, struct rockchip_usb2phy_port, sm_work.work);
 807         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 808         unsigned int sh = rport->port_cfg->utmi_hstdet.bitend -
 809                           rport->port_cfg->utmi_hstdet.bitstart + 1;
 810         unsigned int ul, uhd, state;
 811         unsigned int ul_mask, uhd_mask;
 812         int ret;
 813
 814         mutex_lock(&rport->mutex);
 815
 816         ret = regmap_read(rphy->grf, rport->port_cfg->utmi_ls.offset, &ul);
 817         if (ret < 0)
 818                 goto next_schedule;
 819
 820         ret = regmap_read(rphy->grf, rport->port_cfg->utmi_hstdet.offset, &uhd);
 821         if (ret < 0)
 822                 goto next_schedule;
 823
 824         uhd_mask = GENMASK(rport->port_cfg->utmi_hstdet.bitend,
 825                            rport->port_cfg->utmi_hstdet.bitstart);
 826         ul_mask = GENMASK(rport->port_cfg->utmi_ls.bitend,
 827                           rport->port_cfg->utmi_ls.bitstart);
 828
 829         /* stitch on utmi_ls and utmi_hstdet as phy state */
 830         state = ((uhd & uhd_mask) >> rport->port_cfg->utmi_hstdet.bitstart) |
 831                 (((ul & ul_mask) >> rport->port_cfg->utmi_ls.bitstart) << sh);
 832
 833         switch (state) {
 834         case PHY_STATE_HS_ONLINE:
 835                 dev_dbg(&rport->phy->dev, "HS online\n");
 836                 break;
 837         case PHY_STATE_FS_LS_ONLINE:
 838                 /*
 839                  * For FS/LS device, the online state share with connect state
 840                  * from utmi_ls and utmi_hstdet register, so we distinguish
 841                  * them via suspended flag.
 842                  *
 843                  * Plus, there are two cases, one is D- Line pull-up, and D+
 844                  * line pull-down, the state is 4; another is D+ line pull-up,
 845                  * and D- line pull-down, the state is 2.
 846                  */
 847                 if (!rport->suspended) {
 848                         /* D- line pull-up, D+ line pull-down */
 849                         dev_dbg(&rport->phy->dev, "FS/LS online\n");
 850                         break;
 851                 }
 852                 /* fall through */
 853         case PHY_STATE_CONNECT:
 854                 if (rport->suspended) {
 855                         dev_dbg(&rport->phy->dev, "Connected\n");
 856                         rockchip_usb2phy_power_on(rport->phy);
 857                         rport->suspended = false;
 858                 } else {
 859                         /* D+ line pull-up, D- line pull-down */
 860                         dev_dbg(&rport->phy->dev, "FS/LS online\n");
 861                 }
 862                 break;
 863         case PHY_STATE_DISCONNECT:
 864                 if (!rport->suspended) {
 865                         dev_dbg(&rport->phy->dev, "Disconnected\n");
 866                         rockchip_usb2phy_power_off(rport->phy);
 867                         rport->suspended = true;
 868                 }
 869
 870                 /*
 871                  * activate the linestate detection to get the next device
 872                  * plug-in irq.
 873                  */
 874                 property_enable(rphy->grf, &rport->port_cfg->ls_det_clr, true);
 875                 property_enable(rphy->grf, &rport->port_cfg->ls_det_en, true);
 876
 877                 /*
 878                  * we don't need to rearm the delayed work when the phy port
 879                  * is suspended.
 880                  */
 881                 mutex_unlock(&rport->mutex);
 882                 return;
 883         default:
 884                 dev_dbg(&rport->phy->dev, "unknown phy state\n");
 885                 break;
 886         }
 887
 888 next_schedule:
 889         mutex_unlock(&rport->mutex);
 890         schedule_delayed_work(&rport->sm_work, SCHEDULE_DELAY);
 891 }
 892
 893 static irqreturn_t rockchip_usb2phy_linestate_irq(int irq, void *data)
 894 {
 895         struct rockchip_usb2phy_port *rport = data;
 896         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 897
 898         if (!property_enabled(rphy->grf, &rport->port_cfg->ls_det_st))
 899                 return IRQ_NONE;
 900
 901         mutex_lock(&rport->mutex);
 902
 903         /* disable linestate detect irq and clear its status */
 904         property_enable(rphy->grf, &rport->port_cfg->ls_det_en, false);
 905         property_enable(rphy->grf, &rport->port_cfg->ls_det_clr, true);
 906
 907         mutex_unlock(&rport->mutex);
 908
 909         /*
 910          * In this case for host phy port, a new device is plugged in,
 911          * meanwhile, if the phy port is suspended, we need rearm the work to
 912          * resume it and mange its states; otherwise, we do nothing about that.
 913          */
 914         if (rport->suspended && rport->port_id == USB2PHY_PORT_HOST)
 915                 rockchip_usb2phy_sm_work(&rport->sm_work.work);
 916
 917         return IRQ_HANDLED;
 918 }
 919
 920 static irqreturn_t rockchip_usb2phy_bvalid_irq(int irq, void *data)
 921 {
 922         struct rockchip_usb2phy_port *rport = data;
 923         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 924
 925         if (!property_enabled(rphy->grf, &rport->port_cfg->bvalid_det_st))
 926                 return IRQ_NONE;
 927
 928         mutex_lock(&rport->mutex);
 929
 930         /* clear bvalid detect irq pending status */
 931         property_enable(rphy->grf, &rport->port_cfg->bvalid_det_clr, true);
 932
 933         mutex_unlock(&rport->mutex);
 934
 935         rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 936
 937         return IRQ_HANDLED;
 938 }
 939
 940 static irqreturn_t rockchip_usb2phy_otg_mux_irq(int irq, void *data)
 941 {
 942         struct rockchip_usb2phy_port *rport = data;
 943         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 944
 945         if (property_enabled(rphy->grf, &rport->port_cfg->bvalid_det_st))
 946                 return rockchip_usb2phy_bvalid_irq(irq, data);
 947         else
 948                 return IRQ_NONE;
 949 }
 950
 951 static int rockchip_usb2phy_host_port_init(struct rockchip_usb2phy *rphy,
 952                                            struct rockchip_usb2phy_port *rport,
 953                                            struct device_node *child_np)
 954 {
 955         int ret;
 956
 957         rport->port_id = USB2PHY_PORT_HOST;
 958         rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_HOST];
 959         rport->suspended = true;
 960
 961         mutex_init(&rport->mutex);
 962         INIT_DELAYED_WORK(&rport->sm_work, rockchip_usb2phy_sm_work);
 963
 964         rport->ls_irq = of_irq_get_byname(child_np, "linestate");
 965         if (rport->ls_irq < 0) {
 966                 dev_err(rphy->dev, "no linestate irq provided\n");
 967                 return rport->ls_irq;
 968         }
 969
 970         ret = devm_request_threaded_irq(rphy->dev, rport->ls_irq, NULL,
 971                                         rockchip_usb2phy_linestate_irq,
 972                                         IRQF_ONESHOT,
 973                                         "rockchip_usb2phy", rport);
 974         if (ret) {
 975                 dev_err(rphy->dev, "failed to request linestate irq handle\n");
 976                 return ret;
 977         }
 978
 979         return 0;
 980 }
 981
 982 static int rockchip_otg_event(struct notifier_block *nb,
 983                               unsigned long event, void *ptr)
 984 {
 985         struct rockchip_usb2phy_port *rport =
 986                 container_of(nb, struct rockchip_usb2phy_port, event_nb);
 987
 988         schedule_delayed_work(&rport->otg_sm_work, OTG_SCHEDULE_DELAY);
 989
 990         return NOTIFY_DONE;
 991 }
 992
 993 static int rockchip_usb2phy_otg_port_init(struct rockchip_usb2phy *rphy,
 994                                           struct rockchip_usb2phy_port *rport,
 995                                           struct device_node *child_np)
 996 {
 997         int ret;
 998
 999         rport->port_id = USB2PHY_PORT_OTG;
1000         rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_OTG];
1001         rport->state = OTG_STATE_UNDEFINED;
1002
1003         /*
1004          * set suspended flag to true, but actually don't
1005          * put phy in suspend mode, it aims to enable usb
1006          * phy and clock in power_on() called by usb controller
1007          * driver during probe.
1008          */
1009         rport->suspended = true;
1010         rport->vbus_attached = false;
1011
1012         mutex_init(&rport->mutex);
1013
1014         rport->mode = of_usb_get_dr_mode_by_phy(child_np, -1);
1015         if (rport->mode == USB_DR_MODE_HOST ||
1016             rport->mode == USB_DR_MODE_UNKNOWN) {
1017                 ret = 0;
1018                 goto out;
1019         }
1020
1021         INIT_DELAYED_WORK(&rport->chg_work, rockchip_chg_detect_work);
1022         INIT_DELAYED_WORK(&rport->otg_sm_work, rockchip_usb2phy_otg_sm_work);
1023
1024         rport->utmi_avalid =
1025                 of_property_read_bool(child_np, "rockchip,utmi-avalid");
1026
1027         /*
1028          * Some SoCs use one interrupt with otg-id/otg-bvalid/linestate
1029          * interrupts muxed together, so probe the otg-mux interrupt first,
1030          * if not found, then look for the regular interrupts one by one.
1031          */
1032         rport->otg_mux_irq = of_irq_get_byname(child_np, "otg-mux");
1033         if (rport->otg_mux_irq > 0) {
1034                 ret = devm_request_threaded_irq(rphy->dev, rport->otg_mux_irq,
1035                                                 NULL,
1036                                                 rockchip_usb2phy_otg_mux_irq,
1037                                                 IRQF_ONESHOT,
1038                                                 "rockchip_usb2phy_otg",
1039                                                 rport);
1040                 if (ret) {
1041                         dev_err(rphy->dev,
1042                                 "failed to request otg-mux irq handle\n");
1043                         goto out;
1044                 }
1045         } else {
1046                 rport->bvalid_irq = of_irq_get_byname(child_np, "otg-bvalid");
1047                 if (rport->bvalid_irq < 0) {
1048                         dev_err(rphy->dev, "no vbus valid irq provided\n");
1049                         ret = rport->bvalid_irq;
1050                         goto out;
1051                 }
1052
1053                 ret = devm_request_threaded_irq(rphy->dev, rport->bvalid_irq,
1054                                                 NULL,
1055                                                 rockchip_usb2phy_bvalid_irq,
1056                                                 IRQF_ONESHOT,
1057                                                 "rockchip_usb2phy_bvalid",
1058                                                 rport);
1059                 if (ret) {
1060                         dev_err(rphy->dev,
1061                                 "failed to request otg-bvalid irq handle\n");
1062                         goto out;
1063                 }
1064         }
1065
1066         if (!IS_ERR(rphy->edev)) {
1067                 rport->event_nb.notifier_call = rockchip_otg_event;
1068
1069                 ret = devm_extcon_register_notifier(rphy->dev, rphy->edev,
1070                                         EXTCON_USB_HOST, &rport->event_nb);
1071                 if (ret)
1072                         dev_err(rphy->dev, "register USB HOST notifier failed\n");
1073         }
1074
1075 out:
1076         return ret;
1077 }
1078
1079 static int rockchip_usb2phy_probe(struct platform_device *pdev)
1080 {
1081         struct device *dev = &pdev->dev;
1082         struct device_node *np = dev->of_node;
1083         struct device_node *child_np;
1084         struct phy_provider *provider;
1085         struct rockchip_usb2phy *rphy;
1086         const struct rockchip_usb2phy_cfg *phy_cfgs;
1087         const struct of_device_id *match;
1088         unsigned int reg;
1089         int index, ret;
1090
1091         rphy = devm_kzalloc(dev, sizeof(*rphy), GFP_KERNEL);
1092         if (!rphy)
1093                 return -ENOMEM;
1094
1095         match = of_match_device(dev->driver->of_match_table, dev);
1096         if (!match || !match->data) {
1097                 dev_err(dev, "phy configs are not assigned!\n");
1098                 return -EINVAL;
1099         }
1100
1101         if (!dev->parent || !dev->parent->of_node)
1102                 return -EINVAL;
1103
1104         rphy->grf = syscon_node_to_regmap(dev->parent->of_node);
1105         if (IS_ERR(rphy->grf))
1106                 return PTR_ERR(rphy->grf);
1107
1108         if (of_device_is_compatible(np, "rockchip,rv1108-usb2phy")) {
1109                 rphy->usbgrf =
1110                         syscon_regmap_lookup_by_phandle(dev->of_node,
1111                                                         "rockchip,usbgrf");
1112                 if (IS_ERR(rphy->usbgrf))
1113                         return PTR_ERR(rphy->usbgrf);
1114         } else {
1115                 rphy->usbgrf = NULL;
1116         }
1117
1118         if (of_property_read_u32(np, "reg", &reg)) {
1119                 dev_err(dev, "the reg property is not assigned in %s node\n",
1120                         np->name);
1121                 return -EINVAL;
1122         }
1123
1124         rphy->dev = dev;
1125         phy_cfgs = match->data;
1126         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
1127         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
1128         platform_set_drvdata(pdev, rphy);
1129
1130         ret = rockchip_usb2phy_extcon_register(rphy);
1131         if (ret)
1132                 return ret;
1133
1134         /* find out a proper config which can be matched with dt. */
1135         index = 0;
1136         while (phy_cfgs[index].reg) {
1137                 if (phy_cfgs[index].reg == reg) {
1138                         rphy->phy_cfg = &phy_cfgs[index];
1139                         break;
1140                 }
1141
1142                 ++index;
1143         }
1144
1145         if (!rphy->phy_cfg) {
1146                 dev_err(dev, "no phy-config can be matched with %s node\n",
1147                         np->name);
1148                 return -EINVAL;
1149         }
1150
1151         rphy->clk = of_clk_get_by_name(np, "phyclk");
1152         if (!IS_ERR(rphy->clk)) {
1153                 clk_prepare_enable(rphy->clk);
1154         } else {
1155                 dev_info(&pdev->dev, "no phyclk specified\n");
1156                 rphy->clk = NULL;
1157         }
1158
1159         ret = rockchip_usb2phy_clk480m_register(rphy);
1160         if (ret) {
1161                 dev_err(dev, "failed to register 480m output clock\n");
1162                 goto disable_clks;
1163         }
1164
1165         index = 0;
1166         for_each_available_child_of_node(np, child_np) {
1167                 struct rockchip_usb2phy_port *rport = &rphy->ports[index];
1168                 struct phy *phy;
1169
1170                 /* This driver aims to support both otg-port and host-port */
1171                 if (of_node_cmp(child_np->name, "host-port") &&
1172                     of_node_cmp(child_np->name, "otg-port"))
1173                         goto next_child;
1174
1175                 phy = devm_phy_create(dev, child_np, &rockchip_usb2phy_ops);
1176                 if (IS_ERR(phy)) {
1177                         dev_err(dev, "failed to create phy\n");
1178                         ret = PTR_ERR(phy);
1179                         goto put_child;
1180                 }
1181
1182                 rport->phy = phy;
1183                 phy_set_drvdata(rport->phy, rport);
1184
1185                 /* initialize otg/host port separately */
1186                 if (!of_node_cmp(child_np->name, "host-port")) {
1187                         ret = rockchip_usb2phy_host_port_init(rphy, rport,
1188                                                               child_np);
1189                         if (ret)
1190                                 goto put_child;
1191                 } else {
1192                         ret = rockchip_usb2phy_otg_port_init(rphy, rport,
1193                                                              child_np);
1194                         if (ret)
1195                                 goto put_child;
1196                 }
1197
1198 next_child:
1199                 /* to prevent out of boundary */
1200                 if (++index >= rphy->phy_cfg->num_ports)
1201                         break;
1202         }
1203
1204         provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
1205         return PTR_ERR_OR_ZERO(provider);
1206
1207 put_child:
1208         of_node_put(child_np);
1209 disable_clks:
1210         if (rphy->clk) {
1211                 clk_disable_unprepare(rphy->clk);
1212                 clk_put(rphy->clk);
1213         }
1214         return ret;
1215 }
1216
1217 static const struct rockchip_usb2phy_cfg rk3228_phy_cfgs[] = {
1218         {
1219                 .reg = 0x760,
1220                 .num_ports      = 2,
1221                 .clkout_ctl     = { 0x0768, 4, 4, 1, 0 },
1222                 .port_cfgs      = {
1223                         [USB2PHY_PORT_OTG] = {
1224                                 .phy_sus        = { 0x0760, 15, 0, 0, 0x1d1 },
1225                                 .bvalid_det_en  = { 0x0680, 3, 3, 0, 1 },
1226                                 .bvalid_det_st  = { 0x0690, 3, 3, 0, 1 },
1227                                 .bvalid_det_clr = { 0x06a0, 3, 3, 0, 1 },
1228                                 .ls_det_en      = { 0x0680, 2, 2, 0, 1 },
1229                                 .ls_det_st      = { 0x0690, 2, 2, 0, 1 },
1230                                 .ls_det_clr     = { 0x06a0, 2, 2, 0, 1 },
1231                                 .utmi_bvalid    = { 0x0480, 4, 4, 0, 1 },
1232                                 .utmi_ls        = { 0x0480, 3, 2, 0, 1 },
1233                         },
1234                         [USB2PHY_PORT_HOST] = {
1235                                 .phy_sus        = { 0x0764, 15, 0, 0, 0x1d1 },
1236                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1237                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1238                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 }
1239                         }
1240                 },
1241                 .chg_det = {
1242                         .opmode         = { 0x0760, 3, 0, 5, 1 },
1243                         .cp_det         = { 0x0884, 4, 4, 0, 1 },
1244                         .dcp_det        = { 0x0884, 3, 3, 0, 1 },
1245                         .dp_det         = { 0x0884, 5, 5, 0, 1 },
1246                         .idm_sink_en    = { 0x0768, 8, 8, 0, 1 },
1247                         .idp_sink_en    = { 0x0768, 7, 7, 0, 1 },
1248                         .idp_src_en     = { 0x0768, 9, 9, 0, 1 },
1249                         .rdm_pdwn_en    = { 0x0768, 10, 10, 0, 1 },
1250                         .vdm_src_en     = { 0x0768, 12, 12, 0, 1 },
1251                         .vdp_src_en     = { 0x0768, 11, 11, 0, 1 },
1252                 },
1253         },
1254         {
1255                 .reg = 0x800,
1256                 .num_ports      = 2,
1257                 .clkout_ctl     = { 0x0808, 4, 4, 1, 0 },
1258                 .port_cfgs      = {
1259                         [USB2PHY_PORT_OTG] = {
1260                                 .phy_sus        = { 0x800, 15, 0, 0, 0x1d1 },
1261                                 .ls_det_en      = { 0x0684, 0, 0, 0, 1 },
1262                                 .ls_det_st      = { 0x0694, 0, 0, 0, 1 },
1263                                 .ls_det_clr     = { 0x06a4, 0, 0, 0, 1 }
1264                         },
1265                         [USB2PHY_PORT_HOST] = {
1266                                 .phy_sus        = { 0x804, 15, 0, 0, 0x1d1 },
1267                                 .ls_det_en      = { 0x0684, 1, 1, 0, 1 },
1268                                 .ls_det_st      = { 0x0694, 1, 1, 0, 1 },
1269                                 .ls_det_clr     = { 0x06a4, 1, 1, 0, 1 }
1270                         }
1271                 },
1272         },
1273         { /* sentinel */ }
1274 };
1275
1276 static const struct rockchip_usb2phy_cfg rk3328_phy_cfgs[] = {
1277         {
1278                 .reg = 0x100,
1279                 .num_ports      = 2,
1280                 .clkout_ctl     = { 0x108, 4, 4, 1, 0 },
1281                 .port_cfgs      = {
1282                         [USB2PHY_PORT_OTG] = {
1283                                 .phy_sus        = { 0x0100, 15, 0, 0, 0x1d1 },
1284                                 .bvalid_det_en  = { 0x0110, 2, 2, 0, 1 },
1285                                 .bvalid_det_st  = { 0x0114, 2, 2, 0, 1 },
1286                                 .bvalid_det_clr = { 0x0118, 2, 2, 0, 1 },
1287                                 .ls_det_en      = { 0x0110, 0, 0, 0, 1 },
1288                                 .ls_det_st      = { 0x0114, 0, 0, 0, 1 },
1289                                 .ls_det_clr     = { 0x0118, 0, 0, 0, 1 },
1290                                 .utmi_avalid    = { 0x0120, 10, 10, 0, 1 },
1291                                 .utmi_bvalid    = { 0x0120, 9, 9, 0, 1 },
1292                                 .utmi_ls        = { 0x0120, 5, 4, 0, 1 },
1293                         },
1294                         [USB2PHY_PORT_HOST] = {
1295                                 .phy_sus        = { 0x104, 15, 0, 0, 0x1d1 },
1296                                 .ls_det_en      = { 0x110, 1, 1, 0, 1 },
1297                                 .ls_det_st      = { 0x114, 1, 1, 0, 1 },
1298                                 .ls_det_clr     = { 0x118, 1, 1, 0, 1 },
1299                                 .utmi_ls        = { 0x120, 17, 16, 0, 1 },
1300                                 .utmi_hstdet    = { 0x120, 19, 19, 0, 1 }
1301                         }
1302                 },
1303                 .chg_det = {
1304                         .opmode         = { 0x0100, 3, 0, 5, 1 },
1305                         .cp_det         = { 0x0120, 24, 24, 0, 1 },
1306                         .dcp_det        = { 0x0120, 23, 23, 0, 1 },
1307                         .dp_det         = { 0x0120, 25, 25, 0, 1 },
1308                         .idm_sink_en    = { 0x0108, 8, 8, 0, 1 },
1309                         .idp_sink_en    = { 0x0108, 7, 7, 0, 1 },
1310                         .idp_src_en     = { 0x0108, 9, 9, 0, 1 },
1311                         .rdm_pdwn_en    = { 0x0108, 10, 10, 0, 1 },
1312                         .vdm_src_en     = { 0x0108, 12, 12, 0, 1 },
1313                         .vdp_src_en     = { 0x0108, 11, 11, 0, 1 },
1314                 },
1315         },
1316         { /* sentinel */ }
1317 };
1318
1319 static const struct rockchip_usb2phy_cfg rk3366_phy_cfgs[] = {
1320         {
1321                 .reg = 0x700,
1322                 .num_ports      = 2,
1323                 .clkout_ctl     = { 0x0724, 15, 15, 1, 0 },
1324                 .port_cfgs      = {
1325                         [USB2PHY_PORT_HOST] = {
1326                                 .phy_sus        = { 0x0728, 15, 0, 0, 0x1d1 },
1327                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1328                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1329                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 },
1330                                 .utmi_ls        = { 0x049c, 14, 13, 0, 1 },
1331                                 .utmi_hstdet    = { 0x049c, 12, 12, 0, 1 }
1332                         }
1333                 },
1334         },
1335         { /* sentinel */ }
1336 };
1337
1338 static const struct rockchip_usb2phy_cfg rk3399_phy_cfgs[] = {
1339         {
1340                 .reg            = 0xe450,
1341                 .num_ports      = 2,
1342                 .clkout_ctl     = { 0xe450, 4, 4, 1, 0 },
1343                 .port_cfgs      = {
1344                         [USB2PHY_PORT_OTG] = {
1345                                 .phy_sus        = { 0xe454, 1, 0, 2, 1 },
1346                                 .bvalid_det_en  = { 0xe3c0, 3, 3, 0, 1 },
1347                                 .bvalid_det_st  = { 0xe3e0, 3, 3, 0, 1 },
1348                                 .bvalid_det_clr = { 0xe3d0, 3, 3, 0, 1 },
1349                                 .utmi_avalid    = { 0xe2ac, 7, 7, 0, 1 },
1350                                 .utmi_bvalid    = { 0xe2ac, 12, 12, 0, 1 },
1351                         },
1352                         [USB2PHY_PORT_HOST] = {
1353                                 .phy_sus        = { 0xe458, 1, 0, 0x2, 0x1 },
1354                                 .ls_det_en      = { 0xe3c0, 6, 6, 0, 1 },
1355                                 .ls_det_st      = { 0xe3e0, 6, 6, 0, 1 },
1356                                 .ls_det_clr     = { 0xe3d0, 6, 6, 0, 1 },
1357                                 .utmi_ls        = { 0xe2ac, 22, 21, 0, 1 },
1358                                 .utmi_hstdet    = { 0xe2ac, 23, 23, 0, 1 }
1359                         }
1360                 },
1361                 .chg_det = {
1362                         .opmode         = { 0xe454, 3, 0, 5, 1 },
1363                         .cp_det         = { 0xe2ac, 2, 2, 0, 1 },
1364                         .dcp_det        = { 0xe2ac, 1, 1, 0, 1 },
1365                         .dp_det         = { 0xe2ac, 0, 0, 0, 1 },
1366                         .idm_sink_en    = { 0xe450, 8, 8, 0, 1 },
1367                         .idp_sink_en    = { 0xe450, 7, 7, 0, 1 },
1368                         .idp_src_en     = { 0xe450, 9, 9, 0, 1 },
1369                         .rdm_pdwn_en    = { 0xe450, 10, 10, 0, 1 },
1370                         .vdm_src_en     = { 0xe450, 12, 12, 0, 1 },
1371                         .vdp_src_en     = { 0xe450, 11, 11, 0, 1 },
1372                 },
1373         },
1374         {
1375                 .reg            = 0xe460,
1376                 .num_ports      = 2,
1377                 .clkout_ctl     = { 0xe460, 4, 4, 1, 0 },
1378                 .port_cfgs      = {
1379                         [USB2PHY_PORT_OTG] = {
1380                                 .phy_sus        = { 0xe464, 1, 0, 2, 1 },
1381                                 .bvalid_det_en  = { 0xe3c0, 8, 8, 0, 1 },
1382                                 .bvalid_det_st  = { 0xe3e0, 8, 8, 0, 1 },
1383                                 .bvalid_det_clr = { 0xe3d0, 8, 8, 0, 1 },
1384                                 .utmi_avalid    = { 0xe2ac, 10, 10, 0, 1 },
1385                                 .utmi_bvalid    = { 0xe2ac, 16, 16, 0, 1 },
1386                         },
1387                         [USB2PHY_PORT_HOST] = {
1388                                 .phy_sus        = { 0xe468, 1, 0, 0x2, 0x1 },
1389                                 .ls_det_en      = { 0xe3c0, 11, 11, 0, 1 },
1390                                 .ls_det_st      = { 0xe3e0, 11, 11, 0, 1 },
1391                                 .ls_det_clr     = { 0xe3d0, 11, 11, 0, 1 },
1392                                 .utmi_ls        = { 0xe2ac, 26, 25, 0, 1 },
1393                                 .utmi_hstdet    = { 0xe2ac, 27, 27, 0, 1 }
1394                         }
1395                 },
1396         },
1397         { /* sentinel */ }
1398 };
1399
1400 static const struct rockchip_usb2phy_cfg rv1108_phy_cfgs[] = {
1401         {
1402                 .reg = 0x100,
1403                 .num_ports      = 2,
1404                 .clkout_ctl     = { 0x108, 4, 4, 1, 0 },
1405                 .port_cfgs      = {
1406                         [USB2PHY_PORT_OTG] = {
1407                                 .phy_sus        = { 0x0100, 15, 0, 0, 0x1d1 },
1408                                 .bvalid_det_en  = { 0x0680, 3, 3, 0, 1 },
1409                                 .bvalid_det_st  = { 0x0690, 3, 3, 0, 1 },
1410                                 .bvalid_det_clr = { 0x06a0, 3, 3, 0, 1 },
1411                                 .ls_det_en      = { 0x0680, 2, 2, 0, 1 },
1412                                 .ls_det_st      = { 0x0690, 2, 2, 0, 1 },
1413                                 .ls_det_clr     = { 0x06a0, 2, 2, 0, 1 },
1414                                 .utmi_bvalid    = { 0x0804, 10, 10, 0, 1 },
1415                                 .utmi_ls        = { 0x0804, 13, 12, 0, 1 },
1416                         },
1417                         [USB2PHY_PORT_HOST] = {
1418                                 .phy_sus        = { 0x0104, 15, 0, 0, 0x1d1 },
1419                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1420                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1421                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 },
1422                                 .utmi_ls        = { 0x0804, 9, 8, 0, 1 },
1423                                 .utmi_hstdet    = { 0x0804, 7, 7, 0, 1 }
1424                         }
1425                 },
1426                 .chg_det = {
1427                         .opmode         = { 0x0100, 3, 0, 5, 1 },
1428                         .cp_det         = { 0x0804, 1, 1, 0, 1 },
1429                         .dcp_det        = { 0x0804, 0, 0, 0, 1 },
1430                         .dp_det         = { 0x0804, 2, 2, 0, 1 },
1431                         .idm_sink_en    = { 0x0108, 8, 8, 0, 1 },
1432                         .idp_sink_en    = { 0x0108, 7, 7, 0, 1 },
1433                         .idp_src_en     = { 0x0108, 9, 9, 0, 1 },
1434                         .rdm_pdwn_en    = { 0x0108, 10, 10, 0, 1 },
1435                         .vdm_src_en     = { 0x0108, 12, 12, 0, 1 },
1436                         .vdp_src_en     = { 0x0108, 11, 11, 0, 1 },
1437                 },
1438         },
1439         { /* sentinel */ }
1440 };
1441
1442 static const struct of_device_id rockchip_usb2phy_dt_match[] = {
1443         { .compatible = "rockchip,rk3228-usb2phy", .data = &rk3228_phy_cfgs },
1444         { .compatible = "rockchip,rk3328-usb2phy", .data = &rk3328_phy_cfgs },
1445         { .compatible = "rockchip,rk3366-usb2phy", .data = &rk3366_phy_cfgs },
1446         { .compatible = "rockchip,rk3399-usb2phy", .data = &rk3399_phy_cfgs },
1447         { .compatible = "rockchip,rv1108-usb2phy", .data = &rv1108_phy_cfgs },
1448         {}
1449 };
1450 MODULE_DEVICE_TABLE(of, rockchip_usb2phy_dt_match);
1451
1452 static struct platform_driver rockchip_usb2phy_driver = {
1453         .probe          = rockchip_usb2phy_probe,
1454         .driver         = {
1455                 .name   = "rockchip-usb2phy",
1456                 .of_match_table = rockchip_usb2phy_dt_match,
1457         },
1458 };
1459 module_platform_driver(rockchip_usb2phy_driver);
1460
1461 MODULE_AUTHOR("Frank Wang <frank.wang@rock-chips.com>");
1462 MODULE_DESCRIPTION("Rockchip USB2.0 PHY driver");
1463 MODULE_LICENSE("GPL v2");