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                 clk_disable_unprepare(rphy->clk480m);
 472                 return ret;
 473         }
 474
 475         /* waiting for the utmi_clk to become stable */
 476         usleep_range(1500, 2000);
 477
 478         rport->suspended = false;
 479         return 0;
 480 }
 481
 482 static int rockchip_usb2phy_power_off(struct phy *phy)
 483 {
 484         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 485         struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
 486         struct regmap *base = get_reg_base(rphy);
 487         int ret;
 488
 489         dev_dbg(&rport->phy->dev, "port power off\n");
 490
 491         if (rport->suspended)
 492                 return 0;
 493
 494         ret = property_enable(base, &rport->port_cfg->phy_sus, true);
 495         if (ret)
 496                 return ret;
 497
 498         rport->suspended = true;
 499         clk_disable_unprepare(rphy->clk480m);
 500
 501         return 0;
 502 }
 503
 504 static int rockchip_usb2phy_exit(struct phy *phy)
 505 {
 506         struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 507
 508         if (rport->port_id == USB2PHY_PORT_OTG &&
 509             rport->mode != USB_DR_MODE_HOST &&
 510             rport->mode != USB_DR_MODE_UNKNOWN) {
 511                 cancel_delayed_work_sync(&rport->otg_sm_work);
 512                 cancel_delayed_work_sync(&rport->chg_work);
 513         } else if (rport->port_id == USB2PHY_PORT_HOST)
 514                 cancel_delayed_work_sync(&rport->sm_work);
 515
 516         return 0;
 517 }
 518
 519 static const struct phy_ops rockchip_usb2phy_ops = {
 520         .init           = rockchip_usb2phy_init,
 521         .exit           = rockchip_usb2phy_exit,
 522         .power_on       = rockchip_usb2phy_power_on,
 523         .power_off      = rockchip_usb2phy_power_off,
 524         .owner          = THIS_MODULE,
 525 };
 526
 527 static void rockchip_usb2phy_otg_sm_work(struct work_struct *work)
 528 {
 529         struct rockchip_usb2phy_port *rport =
 530                 container_of(work, struct rockchip_usb2phy_port,
 531                              otg_sm_work.work);
 532         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 533         static unsigned int cable;
 534         unsigned long delay;
 535         bool vbus_attach, sch_work, notify_charger;
 536
 537         vbus_attach = property_enabled(rphy->grf,
 538                                        &rport->port_cfg->utmi_bvalid);
 539
 540         sch_work = false;
 541         notify_charger = false;
 542         delay = OTG_SCHEDULE_DELAY;
 543         dev_dbg(&rport->phy->dev, "%s otg sm work\n",
 544                 usb_otg_state_string(rport->state));
 545
 546         switch (rport->state) {
 547         case OTG_STATE_UNDEFINED:
 548                 rport->state = OTG_STATE_B_IDLE;
 549                 if (!vbus_attach)
 550                         rockchip_usb2phy_power_off(rport->phy);
 551                 fallthrough;
 552         case OTG_STATE_B_IDLE:
 553                 if (extcon_get_state(rphy->edev, EXTCON_USB_HOST) > 0) {
 554                         dev_dbg(&rport->phy->dev, "usb otg host connect\n");
 555                         rport->state = OTG_STATE_A_HOST;
 556                         rockchip_usb2phy_power_on(rport->phy);
 557                         return;
 558                 } else if (vbus_attach) {
 559                         dev_dbg(&rport->phy->dev, "vbus_attach\n");
 560                         switch (rphy->chg_state) {
 561                         case USB_CHG_STATE_UNDEFINED:
 562                                 schedule_delayed_work(&rport->chg_work, 0);
 563                                 return;
 564                         case USB_CHG_STATE_DETECTED:
 565                                 switch (rphy->chg_type) {
 566                                 case POWER_SUPPLY_TYPE_USB:
 567                                         dev_dbg(&rport->phy->dev, "sdp cable is connected\n");
 568                                         rockchip_usb2phy_power_on(rport->phy);
 569                                         rport->state = OTG_STATE_B_PERIPHERAL;
 570                                         notify_charger = true;
 571                                         sch_work = true;
 572                                         cable = EXTCON_CHG_USB_SDP;
 573                                         break;
 574                                 case POWER_SUPPLY_TYPE_USB_DCP:
 575                                         dev_dbg(&rport->phy->dev, "dcp cable is connected\n");
 576                                         rockchip_usb2phy_power_off(rport->phy);
 577                                         notify_charger = true;
 578                                         sch_work = true;
 579                                         cable = EXTCON_CHG_USB_DCP;
 580                                         break;
 581                                 case POWER_SUPPLY_TYPE_USB_CDP:
 582                                         dev_dbg(&rport->phy->dev, "cdp cable is connected\n");
 583                                         rockchip_usb2phy_power_on(rport->phy);
 584                                         rport->state = OTG_STATE_B_PERIPHERAL;
 585                                         notify_charger = true;
 586                                         sch_work = true;
 587                                         cable = EXTCON_CHG_USB_CDP;
 588                                         break;
 589                                 default:
 590                                         break;
 591                                 }
 592                                 break;
 593                         default:
 594                                 break;
 595                         }
 596                 } else {
 597                         notify_charger = true;
 598                         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
 599                         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
 600                 }
 601
 602                 if (rport->vbus_attached != vbus_attach) {
 603                         rport->vbus_attached = vbus_attach;
 604
 605                         if (notify_charger && rphy->edev) {
 606                                 extcon_set_state_sync(rphy->edev,
 607                                                         cable, vbus_attach);
 608                                 if (cable == EXTCON_CHG_USB_SDP)
 609                                         extcon_set_state_sync(rphy->edev,
 610                                                               EXTCON_USB,
 611                                                               vbus_attach);
 612                         }
 613                 }
 614                 break;
 615         case OTG_STATE_B_PERIPHERAL:
 616                 if (!vbus_attach) {
 617                         dev_dbg(&rport->phy->dev, "usb disconnect\n");
 618                         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
 619                         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
 620                         rport->state = OTG_STATE_B_IDLE;
 621                         delay = 0;
 622                         rockchip_usb2phy_power_off(rport->phy);
 623                 }
 624                 sch_work = true;
 625                 break;
 626         case OTG_STATE_A_HOST:
 627                 if (extcon_get_state(rphy->edev, EXTCON_USB_HOST) == 0) {
 628                         dev_dbg(&rport->phy->dev, "usb otg host disconnect\n");
 629                         rport->state = OTG_STATE_B_IDLE;
 630                         rockchip_usb2phy_power_off(rport->phy);
 631                 }
 632                 break;
 633         default:
 634                 break;
 635         }
 636
 637         if (sch_work)
 638                 schedule_delayed_work(&rport->otg_sm_work, delay);
 639 }
 640
 641 static const char *chg_to_string(enum power_supply_type chg_type)
 642 {
 643         switch (chg_type) {
 644         case POWER_SUPPLY_TYPE_USB:
 645                 return "USB_SDP_CHARGER";
 646         case POWER_SUPPLY_TYPE_USB_DCP:
 647                 return "USB_DCP_CHARGER";
 648         case POWER_SUPPLY_TYPE_USB_CDP:
 649                 return "USB_CDP_CHARGER";
 650         default:
 651                 return "INVALID_CHARGER";
 652         }
 653 }
 654
 655 static void rockchip_chg_enable_dcd(struct rockchip_usb2phy *rphy,
 656                                     bool en)
 657 {
 658         struct regmap *base = get_reg_base(rphy);
 659
 660         property_enable(base, &rphy->phy_cfg->chg_det.rdm_pdwn_en, en);
 661         property_enable(base, &rphy->phy_cfg->chg_det.idp_src_en, en);
 662 }
 663
 664 static void rockchip_chg_enable_primary_det(struct rockchip_usb2phy *rphy,
 665                                             bool en)
 666 {
 667         struct regmap *base = get_reg_base(rphy);
 668
 669         property_enable(base, &rphy->phy_cfg->chg_det.vdp_src_en, en);
 670         property_enable(base, &rphy->phy_cfg->chg_det.idm_sink_en, en);
 671 }
 672
 673 static void rockchip_chg_enable_secondary_det(struct rockchip_usb2phy *rphy,
 674                                               bool en)
 675 {
 676         struct regmap *base = get_reg_base(rphy);
 677
 678         property_enable(base, &rphy->phy_cfg->chg_det.vdm_src_en, en);
 679         property_enable(base, &rphy->phy_cfg->chg_det.idp_sink_en, en);
 680 }
 681
 682 #define CHG_DCD_POLL_TIME       (100 * HZ / 1000)
 683 #define CHG_DCD_MAX_RETRIES     6
 684 #define CHG_PRIMARY_DET_TIME    (40 * HZ / 1000)
 685 #define CHG_SECONDARY_DET_TIME  (40 * HZ / 1000)
 686 static void rockchip_chg_detect_work(struct work_struct *work)
 687 {
 688         struct rockchip_usb2phy_port *rport =
 689                 container_of(work, struct rockchip_usb2phy_port, chg_work.work);
 690         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 691         struct regmap *base = get_reg_base(rphy);
 692         bool is_dcd, tmout, vout;
 693         unsigned long delay;
 694
 695         dev_dbg(&rport->phy->dev, "chg detection work state = %d\n",
 696                 rphy->chg_state);
 697         switch (rphy->chg_state) {
 698         case USB_CHG_STATE_UNDEFINED:
 699                 if (!rport->suspended)
 700                         rockchip_usb2phy_power_off(rport->phy);
 701                 /* put the controller in non-driving mode */
 702                 property_enable(base, &rphy->phy_cfg->chg_det.opmode, false);
 703                 /* Start DCD processing stage 1 */
 704                 rockchip_chg_enable_dcd(rphy, true);
 705                 rphy->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
 706                 rphy->dcd_retries = 0;
 707                 delay = CHG_DCD_POLL_TIME;
 708                 break;
 709         case USB_CHG_STATE_WAIT_FOR_DCD:
 710                 /* get data contact detection status */
 711                 is_dcd = property_enabled(rphy->grf,
 712                                           &rphy->phy_cfg->chg_det.dp_det);
 713                 tmout = ++rphy->dcd_retries == CHG_DCD_MAX_RETRIES;
 714                 /* stage 2 */
 715                 if (is_dcd || tmout) {
 716                         /* stage 4 */
 717                         /* Turn off DCD circuitry */
 718                         rockchip_chg_enable_dcd(rphy, false);
 719                         /* Voltage Source on DP, Probe on DM */
 720                         rockchip_chg_enable_primary_det(rphy, true);
 721                         delay = CHG_PRIMARY_DET_TIME;
 722                         rphy->chg_state = USB_CHG_STATE_DCD_DONE;
 723                 } else {
 724                         /* stage 3 */
 725                         delay = CHG_DCD_POLL_TIME;
 726                 }
 727                 break;
 728         case USB_CHG_STATE_DCD_DONE:
 729                 vout = property_enabled(rphy->grf,
 730                                         &rphy->phy_cfg->chg_det.cp_det);
 731                 rockchip_chg_enable_primary_det(rphy, false);
 732                 if (vout) {
 733                         /* Voltage Source on DM, Probe on DP  */
 734                         rockchip_chg_enable_secondary_det(rphy, true);
 735                         delay = CHG_SECONDARY_DET_TIME;
 736                         rphy->chg_state = USB_CHG_STATE_PRIMARY_DONE;
 737                 } else {
 738                         if (rphy->dcd_retries == CHG_DCD_MAX_RETRIES) {
 739                                 /* floating charger found */
 740                                 rphy->chg_type = POWER_SUPPLY_TYPE_USB_DCP;
 741                                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 742                                 delay = 0;
 743                         } else {
 744                                 rphy->chg_type = POWER_SUPPLY_TYPE_USB;
 745                                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 746                                 delay = 0;
 747                         }
 748                 }
 749                 break;
 750         case USB_CHG_STATE_PRIMARY_DONE:
 751                 vout = property_enabled(rphy->grf,
 752                                         &rphy->phy_cfg->chg_det.dcp_det);
 753                 /* Turn off voltage source */
 754                 rockchip_chg_enable_secondary_det(rphy, false);
 755                 if (vout)
 756                         rphy->chg_type = POWER_SUPPLY_TYPE_USB_DCP;
 757                 else
 758                         rphy->chg_type = POWER_SUPPLY_TYPE_USB_CDP;
 759                 fallthrough;
 760         case USB_CHG_STATE_SECONDARY_DONE:
 761                 rphy->chg_state = USB_CHG_STATE_DETECTED;
 762                 delay = 0;
 763                 fallthrough;
 764         case USB_CHG_STATE_DETECTED:
 765                 /* put the controller in normal mode */
 766                 property_enable(base, &rphy->phy_cfg->chg_det.opmode, true);
 767                 rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 768                 dev_dbg(&rport->phy->dev, "charger = %s\n",
 769                          chg_to_string(rphy->chg_type));
 770                 return;
 771         default:
 772                 return;
 773         }
 774
 775         schedule_delayed_work(&rport->chg_work, delay);
 776 }
 777
 778 /*
 779  * The function manage host-phy port state and suspend/resume phy port
 780  * to save power.
 781  *
 782  * we rely on utmi_linestate and utmi_hostdisconnect to identify whether
 783  * devices is disconnect or not. Besides, we do not need care it is FS/LS
 784  * disconnected or HS disconnected, actually, we just only need get the
 785  * device is disconnected at last through rearm the delayed work,
 786  * to suspend the phy port in _PHY_STATE_DISCONNECT_ case.
 787  *
 788  * NOTE: It may invoke *phy_powr_off or *phy_power_on which will invoke
 789  * some clk related APIs, so do not invoke it from interrupt context directly.
 790  */
 791 static void rockchip_usb2phy_sm_work(struct work_struct *work)
 792 {
 793         struct rockchip_usb2phy_port *rport =
 794                 container_of(work, struct rockchip_usb2phy_port, sm_work.work);
 795         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 796         unsigned int sh = rport->port_cfg->utmi_hstdet.bitend -
 797                           rport->port_cfg->utmi_hstdet.bitstart + 1;
 798         unsigned int ul, uhd, state;
 799         unsigned int ul_mask, uhd_mask;
 800         int ret;
 801
 802         mutex_lock(&rport->mutex);
 803
 804         ret = regmap_read(rphy->grf, rport->port_cfg->utmi_ls.offset, &ul);
 805         if (ret < 0)
 806                 goto next_schedule;
 807
 808         ret = regmap_read(rphy->grf, rport->port_cfg->utmi_hstdet.offset, &uhd);
 809         if (ret < 0)
 810                 goto next_schedule;
 811
 812         uhd_mask = GENMASK(rport->port_cfg->utmi_hstdet.bitend,
 813                            rport->port_cfg->utmi_hstdet.bitstart);
 814         ul_mask = GENMASK(rport->port_cfg->utmi_ls.bitend,
 815                           rport->port_cfg->utmi_ls.bitstart);
 816
 817         /* stitch on utmi_ls and utmi_hstdet as phy state */
 818         state = ((uhd & uhd_mask) >> rport->port_cfg->utmi_hstdet.bitstart) |
 819                 (((ul & ul_mask) >> rport->port_cfg->utmi_ls.bitstart) << sh);
 820
 821         switch (state) {
 822         case PHY_STATE_HS_ONLINE:
 823                 dev_dbg(&rport->phy->dev, "HS online\n");
 824                 break;
 825         case PHY_STATE_FS_LS_ONLINE:
 826                 /*
 827                  * For FS/LS device, the online state share with connect state
 828                  * from utmi_ls and utmi_hstdet register, so we distinguish
 829                  * them via suspended flag.
 830                  *
 831                  * Plus, there are two cases, one is D- Line pull-up, and D+
 832                  * line pull-down, the state is 4; another is D+ line pull-up,
 833                  * and D- line pull-down, the state is 2.
 834                  */
 835                 if (!rport->suspended) {
 836                         /* D- line pull-up, D+ line pull-down */
 837                         dev_dbg(&rport->phy->dev, "FS/LS online\n");
 838                         break;
 839                 }
 840                 fallthrough;
 841         case PHY_STATE_CONNECT:
 842                 if (rport->suspended) {
 843                         dev_dbg(&rport->phy->dev, "Connected\n");
 844                         rockchip_usb2phy_power_on(rport->phy);
 845                         rport->suspended = false;
 846                 } else {
 847                         /* D+ line pull-up, D- line pull-down */
 848                         dev_dbg(&rport->phy->dev, "FS/LS online\n");
 849                 }
 850                 break;
 851         case PHY_STATE_DISCONNECT:
 852                 if (!rport->suspended) {
 853                         dev_dbg(&rport->phy->dev, "Disconnected\n");
 854                         rockchip_usb2phy_power_off(rport->phy);
 855                         rport->suspended = true;
 856                 }
 857
 858                 /*
 859                  * activate the linestate detection to get the next device
 860                  * plug-in irq.
 861                  */
 862                 property_enable(rphy->grf, &rport->port_cfg->ls_det_clr, true);
 863                 property_enable(rphy->grf, &rport->port_cfg->ls_det_en, true);
 864
 865                 /*
 866                  * we don't need to rearm the delayed work when the phy port
 867                  * is suspended.
 868                  */
 869                 mutex_unlock(&rport->mutex);
 870                 return;
 871         default:
 872                 dev_dbg(&rport->phy->dev, "unknown phy state\n");
 873                 break;
 874         }
 875
 876 next_schedule:
 877         mutex_unlock(&rport->mutex);
 878         schedule_delayed_work(&rport->sm_work, SCHEDULE_DELAY);
 879 }
 880
 881 static irqreturn_t rockchip_usb2phy_linestate_irq(int irq, void *data)
 882 {
 883         struct rockchip_usb2phy_port *rport = data;
 884         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 885
 886         if (!property_enabled(rphy->grf, &rport->port_cfg->ls_det_st))
 887                 return IRQ_NONE;
 888
 889         mutex_lock(&rport->mutex);
 890
 891         /* disable linestate detect irq and clear its status */
 892         property_enable(rphy->grf, &rport->port_cfg->ls_det_en, false);
 893         property_enable(rphy->grf, &rport->port_cfg->ls_det_clr, true);
 894
 895         mutex_unlock(&rport->mutex);
 896
 897         /*
 898          * In this case for host phy port, a new device is plugged in,
 899          * meanwhile, if the phy port is suspended, we need rearm the work to
 900          * resume it and mange its states; otherwise, we do nothing about that.
 901          */
 902         if (rport->suspended && rport->port_id == USB2PHY_PORT_HOST)
 903                 rockchip_usb2phy_sm_work(&rport->sm_work.work);
 904
 905         return IRQ_HANDLED;
 906 }
 907
 908 static irqreturn_t rockchip_usb2phy_bvalid_irq(int irq, void *data)
 909 {
 910         struct rockchip_usb2phy_port *rport = data;
 911         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 912
 913         if (!property_enabled(rphy->grf, &rport->port_cfg->bvalid_det_st))
 914                 return IRQ_NONE;
 915
 916         mutex_lock(&rport->mutex);
 917
 918         /* clear bvalid detect irq pending status */
 919         property_enable(rphy->grf, &rport->port_cfg->bvalid_det_clr, true);
 920
 921         mutex_unlock(&rport->mutex);
 922
 923         rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 924
 925         return IRQ_HANDLED;
 926 }
 927
 928 static irqreturn_t rockchip_usb2phy_otg_mux_irq(int irq, void *data)
 929 {
 930         struct rockchip_usb2phy_port *rport = data;
 931         struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
 932
 933         if (property_enabled(rphy->grf, &rport->port_cfg->bvalid_det_st))
 934                 return rockchip_usb2phy_bvalid_irq(irq, data);
 935         else
 936                 return IRQ_NONE;
 937 }
 938
 939 static int rockchip_usb2phy_host_port_init(struct rockchip_usb2phy *rphy,
 940                                            struct rockchip_usb2phy_port *rport,
 941                                            struct device_node *child_np)
 942 {
 943         int ret;
 944
 945         rport->port_id = USB2PHY_PORT_HOST;
 946         rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_HOST];
 947         rport->suspended = true;
 948
 949         mutex_init(&rport->mutex);
 950         INIT_DELAYED_WORK(&rport->sm_work, rockchip_usb2phy_sm_work);
 951
 952         rport->ls_irq = of_irq_get_byname(child_np, "linestate");
 953         if (rport->ls_irq < 0) {
 954                 dev_err(rphy->dev, "no linestate irq provided\n");
 955                 return rport->ls_irq;
 956         }
 957
 958         ret = devm_request_threaded_irq(rphy->dev, rport->ls_irq, NULL,
 959                                         rockchip_usb2phy_linestate_irq,
 960                                         IRQF_ONESHOT,
 961                                         "rockchip_usb2phy", rport);
 962         if (ret) {
 963                 dev_err(rphy->dev, "failed to request linestate irq handle\n");
 964                 return ret;
 965         }
 966
 967         return 0;
 968 }
 969
 970 static int rockchip_otg_event(struct notifier_block *nb,
 971                               unsigned long event, void *ptr)
 972 {
 973         struct rockchip_usb2phy_port *rport =
 974                 container_of(nb, struct rockchip_usb2phy_port, event_nb);
 975
 976         schedule_delayed_work(&rport->otg_sm_work, OTG_SCHEDULE_DELAY);
 977
 978         return NOTIFY_DONE;
 979 }
 980
 981 static int rockchip_usb2phy_otg_port_init(struct rockchip_usb2phy *rphy,
 982                                           struct rockchip_usb2phy_port *rport,
 983                                           struct device_node *child_np)
 984 {
 985         int ret;
 986
 987         rport->port_id = USB2PHY_PORT_OTG;
 988         rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_OTG];
 989         rport->state = OTG_STATE_UNDEFINED;
 990
 991         /*
 992          * set suspended flag to true, but actually don't
 993          * put phy in suspend mode, it aims to enable usb
 994          * phy and clock in power_on() called by usb controller
 995          * driver during probe.
 996          */
 997         rport->suspended = true;
 998         rport->vbus_attached = false;
 999
1000         mutex_init(&rport->mutex);
1001
1002         rport->mode = of_usb_get_dr_mode_by_phy(child_np, -1);
1003         if (rport->mode == USB_DR_MODE_HOST ||
1004             rport->mode == USB_DR_MODE_UNKNOWN) {
1005                 ret = 0;
1006                 goto out;
1007         }
1008
1009         INIT_DELAYED_WORK(&rport->chg_work, rockchip_chg_detect_work);
1010         INIT_DELAYED_WORK(&rport->otg_sm_work, rockchip_usb2phy_otg_sm_work);
1011
1012         /*
1013          * Some SoCs use one interrupt with otg-id/otg-bvalid/linestate
1014          * interrupts muxed together, so probe the otg-mux interrupt first,
1015          * if not found, then look for the regular interrupts one by one.
1016          */
1017         rport->otg_mux_irq = of_irq_get_byname(child_np, "otg-mux");
1018         if (rport->otg_mux_irq > 0) {
1019                 ret = devm_request_threaded_irq(rphy->dev, rport->otg_mux_irq,
1020                                                 NULL,
1021                                                 rockchip_usb2phy_otg_mux_irq,
1022                                                 IRQF_ONESHOT,
1023                                                 "rockchip_usb2phy_otg",
1024                                                 rport);
1025                 if (ret) {
1026                         dev_err(rphy->dev,
1027                                 "failed to request otg-mux irq handle\n");
1028                         goto out;
1029                 }
1030         } else {
1031                 rport->bvalid_irq = of_irq_get_byname(child_np, "otg-bvalid");
1032                 if (rport->bvalid_irq < 0) {
1033                         dev_err(rphy->dev, "no vbus valid irq provided\n");
1034                         ret = rport->bvalid_irq;
1035                         goto out;
1036                 }
1037
1038                 ret = devm_request_threaded_irq(rphy->dev, rport->bvalid_irq,
1039                                                 NULL,
1040                                                 rockchip_usb2phy_bvalid_irq,
1041                                                 IRQF_ONESHOT,
1042                                                 "rockchip_usb2phy_bvalid",
1043                                                 rport);
1044                 if (ret) {
1045                         dev_err(rphy->dev,
1046                                 "failed to request otg-bvalid irq handle\n");
1047                         goto out;
1048                 }
1049         }
1050
1051         if (!IS_ERR(rphy->edev)) {
1052                 rport->event_nb.notifier_call = rockchip_otg_event;
1053
1054                 ret = devm_extcon_register_notifier(rphy->dev, rphy->edev,
1055                                         EXTCON_USB_HOST, &rport->event_nb);
1056                 if (ret)
1057                         dev_err(rphy->dev, "register USB HOST notifier failed\n");
1058         }
1059
1060 out:
1061         return ret;
1062 }
1063
1064 static int rockchip_usb2phy_probe(struct platform_device *pdev)
1065 {
1066         struct device *dev = &pdev->dev;
1067         struct device_node *np = dev->of_node;
1068         struct device_node *child_np;
1069         struct phy_provider *provider;
1070         struct rockchip_usb2phy *rphy;
1071         const struct rockchip_usb2phy_cfg *phy_cfgs;
1072         const struct of_device_id *match;
1073         unsigned int reg;
1074         int index, ret;
1075
1076         rphy = devm_kzalloc(dev, sizeof(*rphy), GFP_KERNEL);
1077         if (!rphy)
1078                 return -ENOMEM;
1079
1080         match = of_match_device(dev->driver->of_match_table, dev);
1081         if (!match || !match->data) {
1082                 dev_err(dev, "phy configs are not assigned!\n");
1083                 return -EINVAL;
1084         }
1085
1086         if (!dev->parent || !dev->parent->of_node)
1087                 return -EINVAL;
1088
1089         rphy->grf = syscon_node_to_regmap(dev->parent->of_node);
1090         if (IS_ERR(rphy->grf))
1091                 return PTR_ERR(rphy->grf);
1092
1093         if (of_device_is_compatible(np, "rockchip,rv1108-usb2phy")) {
1094                 rphy->usbgrf =
1095                         syscon_regmap_lookup_by_phandle(dev->of_node,
1096                                                         "rockchip,usbgrf");
1097                 if (IS_ERR(rphy->usbgrf))
1098                         return PTR_ERR(rphy->usbgrf);
1099         } else {
1100                 rphy->usbgrf = NULL;
1101         }
1102
1103         if (of_property_read_u32(np, "reg", &reg)) {
1104                 dev_err(dev, "the reg property is not assigned in %pOFn node\n",
1105                         np);
1106                 return -EINVAL;
1107         }
1108
1109         rphy->dev = dev;
1110         phy_cfgs = match->data;
1111         rphy->chg_state = USB_CHG_STATE_UNDEFINED;
1112         rphy->chg_type = POWER_SUPPLY_TYPE_UNKNOWN;
1113         platform_set_drvdata(pdev, rphy);
1114
1115         ret = rockchip_usb2phy_extcon_register(rphy);
1116         if (ret)
1117                 return ret;
1118
1119         /* find out a proper config which can be matched with dt. */
1120         index = 0;
1121         while (phy_cfgs[index].reg) {
1122                 if (phy_cfgs[index].reg == reg) {
1123                         rphy->phy_cfg = &phy_cfgs[index];
1124                         break;
1125                 }
1126
1127                 ++index;
1128         }
1129
1130         if (!rphy->phy_cfg) {
1131                 dev_err(dev, "no phy-config can be matched with %pOFn node\n",
1132                         np);
1133                 return -EINVAL;
1134         }
1135
1136         rphy->clk = of_clk_get_by_name(np, "phyclk");
1137         if (!IS_ERR(rphy->clk)) {
1138                 clk_prepare_enable(rphy->clk);
1139         } else {
1140                 dev_info(&pdev->dev, "no phyclk specified\n");
1141                 rphy->clk = NULL;
1142         }
1143
1144         ret = rockchip_usb2phy_clk480m_register(rphy);
1145         if (ret) {
1146                 dev_err(dev, "failed to register 480m output clock\n");
1147                 goto disable_clks;
1148         }
1149
1150         index = 0;
1151         for_each_available_child_of_node(np, child_np) {
1152                 struct rockchip_usb2phy_port *rport = &rphy->ports[index];
1153                 struct phy *phy;
1154
1155                 /* This driver aims to support both otg-port and host-port */
1156                 if (!of_node_name_eq(child_np, "host-port") &&
1157                     !of_node_name_eq(child_np, "otg-port"))
1158                         goto next_child;
1159
1160                 phy = devm_phy_create(dev, child_np, &rockchip_usb2phy_ops);
1161                 if (IS_ERR(phy)) {
1162                         dev_err(dev, "failed to create phy\n");
1163                         ret = PTR_ERR(phy);
1164                         goto put_child;
1165                 }
1166
1167                 rport->phy = phy;
1168                 phy_set_drvdata(rport->phy, rport);
1169
1170                 /* initialize otg/host port separately */
1171                 if (of_node_name_eq(child_np, "host-port")) {
1172                         ret = rockchip_usb2phy_host_port_init(rphy, rport,
1173                                                               child_np);
1174                         if (ret)
1175                                 goto put_child;
1176                 } else {
1177                         ret = rockchip_usb2phy_otg_port_init(rphy, rport,
1178                                                              child_np);
1179                         if (ret)
1180                                 goto put_child;
1181                 }
1182
1183 next_child:
1184                 /* to prevent out of boundary */
1185                 if (++index >= rphy->phy_cfg->num_ports)
1186                         break;
1187         }
1188
1189         provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
1190         return PTR_ERR_OR_ZERO(provider);
1191
1192 put_child:
1193         of_node_put(child_np);
1194 disable_clks:
1195         if (rphy->clk) {
1196                 clk_disable_unprepare(rphy->clk);
1197                 clk_put(rphy->clk);
1198         }
1199         return ret;
1200 }
1201
1202 static const struct rockchip_usb2phy_cfg rk3228_phy_cfgs[] = {
1203         {
1204                 .reg = 0x760,
1205                 .num_ports      = 2,
1206                 .clkout_ctl     = { 0x0768, 4, 4, 1, 0 },
1207                 .port_cfgs      = {
1208                         [USB2PHY_PORT_OTG] = {
1209                                 .phy_sus        = { 0x0760, 15, 0, 0, 0x1d1 },
1210                                 .bvalid_det_en  = { 0x0680, 3, 3, 0, 1 },
1211                                 .bvalid_det_st  = { 0x0690, 3, 3, 0, 1 },
1212                                 .bvalid_det_clr = { 0x06a0, 3, 3, 0, 1 },
1213                                 .ls_det_en      = { 0x0680, 2, 2, 0, 1 },
1214                                 .ls_det_st      = { 0x0690, 2, 2, 0, 1 },
1215                                 .ls_det_clr     = { 0x06a0, 2, 2, 0, 1 },
1216                                 .utmi_bvalid    = { 0x0480, 4, 4, 0, 1 },
1217                                 .utmi_ls        = { 0x0480, 3, 2, 0, 1 },
1218                         },
1219                         [USB2PHY_PORT_HOST] = {
1220                                 .phy_sus        = { 0x0764, 15, 0, 0, 0x1d1 },
1221                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1222                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1223                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 }
1224                         }
1225                 },
1226                 .chg_det = {
1227                         .opmode         = { 0x0760, 3, 0, 5, 1 },
1228                         .cp_det         = { 0x0884, 4, 4, 0, 1 },
1229                         .dcp_det        = { 0x0884, 3, 3, 0, 1 },
1230                         .dp_det         = { 0x0884, 5, 5, 0, 1 },
1231                         .idm_sink_en    = { 0x0768, 8, 8, 0, 1 },
1232                         .idp_sink_en    = { 0x0768, 7, 7, 0, 1 },
1233                         .idp_src_en     = { 0x0768, 9, 9, 0, 1 },
1234                         .rdm_pdwn_en    = { 0x0768, 10, 10, 0, 1 },
1235                         .vdm_src_en     = { 0x0768, 12, 12, 0, 1 },
1236                         .vdp_src_en     = { 0x0768, 11, 11, 0, 1 },
1237                 },
1238         },
1239         {
1240                 .reg = 0x800,
1241                 .num_ports      = 2,
1242                 .clkout_ctl     = { 0x0808, 4, 4, 1, 0 },
1243                 .port_cfgs      = {
1244                         [USB2PHY_PORT_OTG] = {
1245                                 .phy_sus        = { 0x800, 15, 0, 0, 0x1d1 },
1246                                 .ls_det_en      = { 0x0684, 0, 0, 0, 1 },
1247                                 .ls_det_st      = { 0x0694, 0, 0, 0, 1 },
1248                                 .ls_det_clr     = { 0x06a4, 0, 0, 0, 1 }
1249                         },
1250                         [USB2PHY_PORT_HOST] = {
1251                                 .phy_sus        = { 0x804, 15, 0, 0, 0x1d1 },
1252                                 .ls_det_en      = { 0x0684, 1, 1, 0, 1 },
1253                                 .ls_det_st      = { 0x0694, 1, 1, 0, 1 },
1254                                 .ls_det_clr     = { 0x06a4, 1, 1, 0, 1 }
1255                         }
1256                 },
1257         },
1258         { /* sentinel */ }
1259 };
1260
1261 static const struct rockchip_usb2phy_cfg rk3328_phy_cfgs[] = {
1262         {
1263                 .reg = 0x100,
1264                 .num_ports      = 2,
1265                 .clkout_ctl     = { 0x108, 4, 4, 1, 0 },
1266                 .port_cfgs      = {
1267                         [USB2PHY_PORT_OTG] = {
1268                                 .phy_sus        = { 0x0100, 15, 0, 0, 0x1d1 },
1269                                 .bvalid_det_en  = { 0x0110, 2, 2, 0, 1 },
1270                                 .bvalid_det_st  = { 0x0114, 2, 2, 0, 1 },
1271                                 .bvalid_det_clr = { 0x0118, 2, 2, 0, 1 },
1272                                 .ls_det_en      = { 0x0110, 0, 0, 0, 1 },
1273                                 .ls_det_st      = { 0x0114, 0, 0, 0, 1 },
1274                                 .ls_det_clr     = { 0x0118, 0, 0, 0, 1 },
1275                                 .utmi_avalid    = { 0x0120, 10, 10, 0, 1 },
1276                                 .utmi_bvalid    = { 0x0120, 9, 9, 0, 1 },
1277                                 .utmi_ls        = { 0x0120, 5, 4, 0, 1 },
1278                         },
1279                         [USB2PHY_PORT_HOST] = {
1280                                 .phy_sus        = { 0x104, 15, 0, 0, 0x1d1 },
1281                                 .ls_det_en      = { 0x110, 1, 1, 0, 1 },
1282                                 .ls_det_st      = { 0x114, 1, 1, 0, 1 },
1283                                 .ls_det_clr     = { 0x118, 1, 1, 0, 1 },
1284                                 .utmi_ls        = { 0x120, 17, 16, 0, 1 },
1285                                 .utmi_hstdet    = { 0x120, 19, 19, 0, 1 }
1286                         }
1287                 },
1288                 .chg_det = {
1289                         .opmode         = { 0x0100, 3, 0, 5, 1 },
1290                         .cp_det         = { 0x0120, 24, 24, 0, 1 },
1291                         .dcp_det        = { 0x0120, 23, 23, 0, 1 },
1292                         .dp_det         = { 0x0120, 25, 25, 0, 1 },
1293                         .idm_sink_en    = { 0x0108, 8, 8, 0, 1 },
1294                         .idp_sink_en    = { 0x0108, 7, 7, 0, 1 },
1295                         .idp_src_en     = { 0x0108, 9, 9, 0, 1 },
1296                         .rdm_pdwn_en    = { 0x0108, 10, 10, 0, 1 },
1297                         .vdm_src_en     = { 0x0108, 12, 12, 0, 1 },
1298                         .vdp_src_en     = { 0x0108, 11, 11, 0, 1 },
1299                 },
1300         },
1301         { /* sentinel */ }
1302 };
1303
1304 static const struct rockchip_usb2phy_cfg rk3366_phy_cfgs[] = {
1305         {
1306                 .reg = 0x700,
1307                 .num_ports      = 2,
1308                 .clkout_ctl     = { 0x0724, 15, 15, 1, 0 },
1309                 .port_cfgs      = {
1310                         [USB2PHY_PORT_HOST] = {
1311                                 .phy_sus        = { 0x0728, 15, 0, 0, 0x1d1 },
1312                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1313                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1314                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 },
1315                                 .utmi_ls        = { 0x049c, 14, 13, 0, 1 },
1316                                 .utmi_hstdet    = { 0x049c, 12, 12, 0, 1 }
1317                         }
1318                 },
1319         },
1320         { /* sentinel */ }
1321 };
1322
1323 static const struct rockchip_usb2phy_cfg rk3399_phy_cfgs[] = {
1324         {
1325                 .reg            = 0xe450,
1326                 .num_ports      = 2,
1327                 .clkout_ctl     = { 0xe450, 4, 4, 1, 0 },
1328                 .port_cfgs      = {
1329                         [USB2PHY_PORT_OTG] = {
1330                                 .phy_sus        = { 0xe454, 1, 0, 2, 1 },
1331                                 .bvalid_det_en  = { 0xe3c0, 3, 3, 0, 1 },
1332                                 .bvalid_det_st  = { 0xe3e0, 3, 3, 0, 1 },
1333                                 .bvalid_det_clr = { 0xe3d0, 3, 3, 0, 1 },
1334                                 .utmi_avalid    = { 0xe2ac, 7, 7, 0, 1 },
1335                                 .utmi_bvalid    = { 0xe2ac, 12, 12, 0, 1 },
1336                         },
1337                         [USB2PHY_PORT_HOST] = {
1338                                 .phy_sus        = { 0xe458, 1, 0, 0x2, 0x1 },
1339                                 .ls_det_en      = { 0xe3c0, 6, 6, 0, 1 },
1340                                 .ls_det_st      = { 0xe3e0, 6, 6, 0, 1 },
1341                                 .ls_det_clr     = { 0xe3d0, 6, 6, 0, 1 },
1342                                 .utmi_ls        = { 0xe2ac, 22, 21, 0, 1 },
1343                                 .utmi_hstdet    = { 0xe2ac, 23, 23, 0, 1 }
1344                         }
1345                 },
1346                 .chg_det = {
1347                         .opmode         = { 0xe454, 3, 0, 5, 1 },
1348                         .cp_det         = { 0xe2ac, 2, 2, 0, 1 },
1349                         .dcp_det        = { 0xe2ac, 1, 1, 0, 1 },
1350                         .dp_det         = { 0xe2ac, 0, 0, 0, 1 },
1351                         .idm_sink_en    = { 0xe450, 8, 8, 0, 1 },
1352                         .idp_sink_en    = { 0xe450, 7, 7, 0, 1 },
1353                         .idp_src_en     = { 0xe450, 9, 9, 0, 1 },
1354                         .rdm_pdwn_en    = { 0xe450, 10, 10, 0, 1 },
1355                         .vdm_src_en     = { 0xe450, 12, 12, 0, 1 },
1356                         .vdp_src_en     = { 0xe450, 11, 11, 0, 1 },
1357                 },
1358         },
1359         {
1360                 .reg            = 0xe460,
1361                 .num_ports      = 2,
1362                 .clkout_ctl     = { 0xe460, 4, 4, 1, 0 },
1363                 .port_cfgs      = {
1364                         [USB2PHY_PORT_OTG] = {
1365                                 .phy_sus        = { 0xe464, 1, 0, 2, 1 },
1366                                 .bvalid_det_en  = { 0xe3c0, 8, 8, 0, 1 },
1367                                 .bvalid_det_st  = { 0xe3e0, 8, 8, 0, 1 },
1368                                 .bvalid_det_clr = { 0xe3d0, 8, 8, 0, 1 },
1369                                 .utmi_avalid    = { 0xe2ac, 10, 10, 0, 1 },
1370                                 .utmi_bvalid    = { 0xe2ac, 16, 16, 0, 1 },
1371                         },
1372                         [USB2PHY_PORT_HOST] = {
1373                                 .phy_sus        = { 0xe468, 1, 0, 0x2, 0x1 },
1374                                 .ls_det_en      = { 0xe3c0, 11, 11, 0, 1 },
1375                                 .ls_det_st      = { 0xe3e0, 11, 11, 0, 1 },
1376                                 .ls_det_clr     = { 0xe3d0, 11, 11, 0, 1 },
1377                                 .utmi_ls        = { 0xe2ac, 26, 25, 0, 1 },
1378                                 .utmi_hstdet    = { 0xe2ac, 27, 27, 0, 1 }
1379                         }
1380                 },
1381         },
1382         { /* sentinel */ }
1383 };
1384
1385 static const struct rockchip_usb2phy_cfg rv1108_phy_cfgs[] = {
1386         {
1387                 .reg = 0x100,
1388                 .num_ports      = 2,
1389                 .clkout_ctl     = { 0x108, 4, 4, 1, 0 },
1390                 .port_cfgs      = {
1391                         [USB2PHY_PORT_OTG] = {
1392                                 .phy_sus        = { 0x0100, 15, 0, 0, 0x1d1 },
1393                                 .bvalid_det_en  = { 0x0680, 3, 3, 0, 1 },
1394                                 .bvalid_det_st  = { 0x0690, 3, 3, 0, 1 },
1395                                 .bvalid_det_clr = { 0x06a0, 3, 3, 0, 1 },
1396                                 .ls_det_en      = { 0x0680, 2, 2, 0, 1 },
1397                                 .ls_det_st      = { 0x0690, 2, 2, 0, 1 },
1398                                 .ls_det_clr     = { 0x06a0, 2, 2, 0, 1 },
1399                                 .utmi_bvalid    = { 0x0804, 10, 10, 0, 1 },
1400                                 .utmi_ls        = { 0x0804, 13, 12, 0, 1 },
1401                         },
1402                         [USB2PHY_PORT_HOST] = {
1403                                 .phy_sus        = { 0x0104, 15, 0, 0, 0x1d1 },
1404                                 .ls_det_en      = { 0x0680, 4, 4, 0, 1 },
1405                                 .ls_det_st      = { 0x0690, 4, 4, 0, 1 },
1406                                 .ls_det_clr     = { 0x06a0, 4, 4, 0, 1 },
1407                                 .utmi_ls        = { 0x0804, 9, 8, 0, 1 },
1408                                 .utmi_hstdet    = { 0x0804, 7, 7, 0, 1 }
1409                         }
1410                 },
1411                 .chg_det = {
1412                         .opmode         = { 0x0100, 3, 0, 5, 1 },
1413                         .cp_det         = { 0x0804, 1, 1, 0, 1 },
1414                         .dcp_det        = { 0x0804, 0, 0, 0, 1 },
1415                         .dp_det         = { 0x0804, 2, 2, 0, 1 },
1416                         .idm_sink_en    = { 0x0108, 8, 8, 0, 1 },
1417                         .idp_sink_en    = { 0x0108, 7, 7, 0, 1 },
1418                         .idp_src_en     = { 0x0108, 9, 9, 0, 1 },
1419                         .rdm_pdwn_en    = { 0x0108, 10, 10, 0, 1 },
1420                         .vdm_src_en     = { 0x0108, 12, 12, 0, 1 },
1421                         .vdp_src_en     = { 0x0108, 11, 11, 0, 1 },
1422                 },
1423         },
1424         { /* sentinel */ }
1425 };
1426
1427 static const struct of_device_id rockchip_usb2phy_dt_match[] = {
1428         { .compatible = "rockchip,px30-usb2phy", .data = &rk3328_phy_cfgs },
1429         { .compatible = "rockchip,rk3228-usb2phy", .data = &rk3228_phy_cfgs },
1430         { .compatible = "rockchip,rk3328-usb2phy", .data = &rk3328_phy_cfgs },
1431         { .compatible = "rockchip,rk3366-usb2phy", .data = &rk3366_phy_cfgs },
1432         { .compatible = "rockchip,rk3399-usb2phy", .data = &rk3399_phy_cfgs },
1433         { .compatible = "rockchip,rv1108-usb2phy", .data = &rv1108_phy_cfgs },
1434         {}
1435 };
1436 MODULE_DEVICE_TABLE(of, rockchip_usb2phy_dt_match);
1437
1438 static struct platform_driver rockchip_usb2phy_driver = {
1439         .probe          = rockchip_usb2phy_probe,
1440         .driver         = {
1441                 .name   = "rockchip-usb2phy",
1442                 .of_match_table = rockchip_usb2phy_dt_match,
1443         },
1444 };
1445 module_platform_driver(rockchip_usb2phy_driver);
1446
1447 MODULE_AUTHOR("Frank Wang <frank.wang@rock-chips.com>");
1448 MODULE_DESCRIPTION("Rockchip USB2.0 PHY driver");
1449 MODULE_LICENSE("GPL v2");