drivers/phy/tegra/xusb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014-2022, NVIDIA CORPORATION.  All rights reserved.
   4  */
   5
   6 #include <linux/delay.h>
   7 #include <linux/io.h>
   8 #include <linux/mailbox_client.h>
   9 #include <linux/module.h>
  10 #include <linux/of.h>
  11 #include <linux/of_platform.h>
  12 #include <linux/phy/phy.h>
  13 #include <linux/phy/tegra/xusb.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/regulator/consumer.h>
  16 #include <linux/reset.h>
  17 #include <linux/slab.h>
  18 #include <linux/workqueue.h>
  19
  20 #include <soc/tegra/fuse.h>
  21
  22 #include "xusb.h"
  23
  24 static struct phy *tegra_xusb_pad_of_xlate(struct device *dev,
  25                                            const struct of_phandle_args *args)
  26 {
  27         struct tegra_xusb_pad *pad = dev_get_drvdata(dev);
  28         struct phy *phy = NULL;
  29         unsigned int i;
  30
  31         if (args->args_count != 0)
  32                 return ERR_PTR(-EINVAL);
  33
  34         for (i = 0; i < pad->soc->num_lanes; i++) {
  35                 if (!pad->lanes[i])
  36                         continue;
  37
  38                 if (pad->lanes[i]->dev.of_node == args->np) {
  39                         phy = pad->lanes[i];
  40                         break;
  41                 }
  42         }
  43
  44         if (phy == NULL)
  45                 phy = ERR_PTR(-ENODEV);
  46
  47         return phy;
  48 }
  49
  50 static const struct of_device_id tegra_xusb_padctl_of_match[] = {
  51 #if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
  52         {
  53                 .compatible = "nvidia,tegra124-xusb-padctl",
  54                 .data = &tegra124_xusb_padctl_soc,
  55         },
  56 #endif
  57 #if defined(CONFIG_ARCH_TEGRA_210_SOC)
  58         {
  59                 .compatible = "nvidia,tegra210-xusb-padctl",
  60                 .data = &tegra210_xusb_padctl_soc,
  61         },
  62 #endif
  63 #if defined(CONFIG_ARCH_TEGRA_186_SOC)
  64         {
  65                 .compatible = "nvidia,tegra186-xusb-padctl",
  66                 .data = &tegra186_xusb_padctl_soc,
  67         },
  68 #endif
  69 #if defined(CONFIG_ARCH_TEGRA_194_SOC)
  70         {
  71                 .compatible = "nvidia,tegra194-xusb-padctl",
  72                 .data = &tegra194_xusb_padctl_soc,
  73         },
  74 #endif
  75 #if defined(CONFIG_ARCH_TEGRA_234_SOC)
  76         {
  77                 .compatible = "nvidia,tegra234-xusb-padctl",
  78                 .data = &tegra234_xusb_padctl_soc,
  79         },
  80 #endif
  81         { }
  82 };
  83 MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
  84
  85 static struct device_node *
  86 tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
  87 {
  88         struct device_node *pads, *np;
  89
  90         pads = of_get_child_by_name(padctl->dev->of_node, "pads");
  91         if (!pads)
  92                 return NULL;
  93
  94         np = of_get_child_by_name(pads, name);
  95         of_node_put(pads);
  96
  97         return np;
  98 }
  99
 100 static struct device_node *
 101 tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
 102 {
 103         struct device_node *np, *lanes;
 104
 105         lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
 106         if (!lanes)
 107                 return NULL;
 108
 109         np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
 110         of_node_put(lanes);
 111
 112         return np;
 113 }
 114
 115 int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
 116                              struct device_node *np)
 117 {
 118         struct device *dev = &lane->pad->dev;
 119         const char *function;
 120         int err;
 121
 122         err = of_property_read_string(np, "nvidia,function", &function);
 123         if (err < 0)
 124                 return err;
 125
 126         err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
 127         if (err < 0) {
 128                 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
 129                         function, np);
 130                 return err;
 131         }
 132
 133         lane->function = err;
 134
 135         return 0;
 136 }
 137
 138 static void tegra_xusb_lane_destroy(struct phy *phy)
 139 {
 140         if (phy) {
 141                 struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
 142
 143                 lane->pad->ops->remove(lane);
 144                 phy_destroy(phy);
 145         }
 146 }
 147
 148 static void tegra_xusb_pad_release(struct device *dev)
 149 {
 150         struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
 151
 152         pad->soc->ops->remove(pad);
 153 }
 154
 155 static const struct device_type tegra_xusb_pad_type = {
 156         .release = tegra_xusb_pad_release,
 157 };
 158
 159 int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
 160                         struct tegra_xusb_padctl *padctl,
 161                         struct device_node *np)
 162 {
 163         int err;
 164
 165         device_initialize(&pad->dev);
 166         INIT_LIST_HEAD(&pad->list);
 167         pad->dev.parent = padctl->dev;
 168         pad->dev.type = &tegra_xusb_pad_type;
 169         pad->dev.of_node = np;
 170         pad->padctl = padctl;
 171
 172         err = dev_set_name(&pad->dev, "%s", pad->soc->name);
 173         if (err < 0)
 174                 goto unregister;
 175
 176         err = device_add(&pad->dev);
 177         if (err < 0)
 178                 goto unregister;
 179
 180         return 0;
 181
 182 unregister:
 183         device_unregister(&pad->dev);
 184         return err;
 185 }
 186
 187 int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
 188                             const struct phy_ops *ops)
 189 {
 190         struct device_node *children;
 191         struct phy *lane;
 192         unsigned int i;
 193         int err;
 194
 195         children = of_get_child_by_name(pad->dev.of_node, "lanes");
 196         if (!children)
 197                 return -ENODEV;
 198
 199         pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
 200                                   GFP_KERNEL);
 201         if (!pad->lanes) {
 202                 of_node_put(children);
 203                 return -ENOMEM;
 204         }
 205
 206         for (i = 0; i < pad->soc->num_lanes; i++) {
 207                 struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i);
 208                 struct tegra_xusb_lane *lane;
 209
 210                 /* skip disabled lanes */
 211                 if (!np || !of_device_is_available(np)) {
 212                         of_node_put(np);
 213                         continue;
 214                 }
 215
 216                 pad->lanes[i] = phy_create(&pad->dev, np, ops);
 217                 if (IS_ERR(pad->lanes[i])) {
 218                         err = PTR_ERR(pad->lanes[i]);
 219                         of_node_put(np);
 220                         goto remove;
 221                 }
 222
 223                 lane = pad->ops->probe(pad, np, i);
 224                 if (IS_ERR(lane)) {
 225                         phy_destroy(pad->lanes[i]);
 226                         err = PTR_ERR(lane);
 227                         goto remove;
 228                 }
 229
 230                 list_add_tail(&lane->list, &pad->padctl->lanes);
 231                 phy_set_drvdata(pad->lanes[i], lane);
 232         }
 233
 234         pad->provider = of_phy_provider_register_full(&pad->dev, children,
 235                                                       tegra_xusb_pad_of_xlate);
 236         if (IS_ERR(pad->provider)) {
 237                 err = PTR_ERR(pad->provider);
 238                 goto remove;
 239         }
 240
 241         return 0;
 242
 243 remove:
 244         while (i--)
 245                 tegra_xusb_lane_destroy(pad->lanes[i]);
 246
 247         of_node_put(children);
 248
 249         return err;
 250 }
 251
 252 void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
 253 {
 254         unsigned int i = pad->soc->num_lanes;
 255
 256         of_phy_provider_unregister(pad->provider);
 257
 258         while (i--)
 259                 tegra_xusb_lane_destroy(pad->lanes[i]);
 260
 261         device_unregister(&pad->dev);
 262 }
 263
 264 static struct tegra_xusb_pad *
 265 tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
 266                       const struct tegra_xusb_pad_soc *soc)
 267 {
 268         struct tegra_xusb_pad *pad;
 269         struct device_node *np;
 270         int err;
 271
 272         np = tegra_xusb_find_pad_node(padctl, soc->name);
 273         if (!np || !of_device_is_available(np))
 274                 return NULL;
 275
 276         pad = soc->ops->probe(padctl, soc, np);
 277         if (IS_ERR(pad)) {
 278                 err = PTR_ERR(pad);
 279                 dev_err(padctl->dev, "failed to create pad %s: %d\n",
 280                         soc->name, err);
 281                 return ERR_PTR(err);
 282         }
 283
 284         /* XXX move this into ->probe() to avoid string comparison */
 285         if (strcmp(soc->name, "pcie") == 0)
 286                 padctl->pcie = pad;
 287
 288         if (strcmp(soc->name, "sata") == 0)
 289                 padctl->sata = pad;
 290
 291         if (strcmp(soc->name, "usb2") == 0)
 292                 padctl->usb2 = pad;
 293
 294         if (strcmp(soc->name, "ulpi") == 0)
 295                 padctl->ulpi = pad;
 296
 297         if (strcmp(soc->name, "hsic") == 0)
 298                 padctl->hsic = pad;
 299
 300         return pad;
 301 }
 302
 303 static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
 304 {
 305         struct tegra_xusb_pad *pad, *tmp;
 306
 307         list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
 308                 list_del(&pad->list);
 309                 tegra_xusb_pad_unregister(pad);
 310         }
 311 }
 312
 313 static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
 314 {
 315         mutex_lock(&padctl->lock);
 316         __tegra_xusb_remove_pads(padctl);
 317         mutex_unlock(&padctl->lock);
 318 }
 319
 320 static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
 321 {
 322         struct tegra_xusb_padctl *padctl = lane->pad->padctl;
 323         const struct tegra_xusb_lane_soc *soc = lane->soc;
 324         u32 value;
 325
 326         /* skip single function lanes */
 327         if (soc->num_funcs < 2)
 328                 return;
 329
 330         if (lane->pad->ops->iddq_enable)
 331                 lane->pad->ops->iddq_enable(lane);
 332
 333         /* choose function */
 334         value = padctl_readl(padctl, soc->offset);
 335         value &= ~(soc->mask << soc->shift);
 336         value |= lane->function << soc->shift;
 337         padctl_writel(padctl, value, soc->offset);
 338
 339         if (lane->pad->ops->iddq_disable)
 340                 lane->pad->ops->iddq_disable(lane);
 341 }
 342
 343 static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
 344 {
 345         unsigned int i;
 346
 347         for (i = 0; i < pad->soc->num_lanes; i++) {
 348                 struct tegra_xusb_lane *lane;
 349
 350                 if (pad->lanes[i]) {
 351                         lane = phy_get_drvdata(pad->lanes[i]);
 352                         tegra_xusb_lane_program(lane);
 353                 }
 354         }
 355 }
 356
 357 static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
 358 {
 359         struct tegra_xusb_pad *pad;
 360         unsigned int i;
 361
 362         mutex_lock(&padctl->lock);
 363
 364         for (i = 0; i < padctl->soc->num_pads; i++) {
 365                 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
 366                 int err;
 367
 368                 pad = tegra_xusb_pad_create(padctl, soc);
 369                 if (IS_ERR(pad)) {
 370                         err = PTR_ERR(pad);
 371                         dev_err(padctl->dev, "failed to create pad %s: %d\n",
 372                                 soc->name, err);
 373                         __tegra_xusb_remove_pads(padctl);
 374                         mutex_unlock(&padctl->lock);
 375                         return err;
 376                 }
 377
 378                 if (!pad)
 379                         continue;
 380
 381                 list_add_tail(&pad->list, &padctl->pads);
 382         }
 383
 384         list_for_each_entry(pad, &padctl->pads, list)
 385                 tegra_xusb_pad_program(pad);
 386
 387         mutex_unlock(&padctl->lock);
 388         return 0;
 389 }
 390
 391 bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
 392                                   const char *function)
 393 {
 394         const char *func = lane->soc->funcs[lane->function];
 395
 396         return strcmp(function, func) == 0;
 397 }
 398
 399 struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
 400                                              const char *type,
 401                                              unsigned int index)
 402 {
 403         struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
 404         char *name;
 405
 406         name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
 407         if (!name)
 408                 return ERR_PTR(-ENOMEM);
 409
 410         list_for_each_entry(lane, &padctl->lanes, list) {
 411                 if (strcmp(lane->soc->name, name) == 0) {
 412                         hit = lane;
 413                         break;
 414                 }
 415         }
 416
 417         kfree(name);
 418         return hit;
 419 }
 420
 421 struct tegra_xusb_lane *
 422 tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
 423                           const struct tegra_xusb_lane_map *map,
 424                           const char *function)
 425 {
 426         struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
 427
 428         for (; map->type; map++) {
 429                 if (port->index != map->port)
 430                         continue;
 431
 432                 lane = tegra_xusb_find_lane(port->padctl, map->type,
 433                                             map->index);
 434                 if (IS_ERR(lane))
 435                         continue;
 436
 437                 if (!tegra_xusb_lane_check(lane, function))
 438                         continue;
 439
 440                 if (!IS_ERR(match))
 441                         dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
 442                                 map->type, map->index, match->soc->name);
 443                 else
 444                         match = lane;
 445         }
 446
 447         return match;
 448 }
 449
 450 static struct device_node *
 451 tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
 452                           unsigned int index)
 453 {
 454         struct device_node *ports, *np;
 455         char *name;
 456
 457         ports = of_get_child_by_name(padctl->dev->of_node, "ports");
 458         if (!ports)
 459                 return NULL;
 460
 461         name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
 462         if (!name) {
 463                 of_node_put(ports);
 464                 return NULL;
 465         }
 466         np = of_get_child_by_name(ports, name);
 467         kfree(name);
 468         of_node_put(ports);
 469
 470         return np;
 471 }
 472
 473 struct tegra_xusb_port *
 474 tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
 475                      unsigned int index)
 476 {
 477         struct tegra_xusb_port *port;
 478         struct device_node *np;
 479
 480         np = tegra_xusb_find_port_node(padctl, type, index);
 481         if (!np)
 482                 return NULL;
 483
 484         list_for_each_entry(port, &padctl->ports, list) {
 485                 if (np == port->dev.of_node) {
 486                         of_node_put(np);
 487                         return port;
 488                 }
 489         }
 490
 491         of_node_put(np);
 492
 493         return NULL;
 494 }
 495
 496 struct tegra_xusb_usb2_port *
 497 tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
 498 {
 499         struct tegra_xusb_port *port;
 500
 501         port = tegra_xusb_find_port(padctl, "usb2", index);
 502         if (port)
 503                 return to_usb2_port(port);
 504
 505         return NULL;
 506 }
 507
 508 struct tegra_xusb_usb3_port *
 509 tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
 510 {
 511         struct tegra_xusb_port *port;
 512
 513         port = tegra_xusb_find_port(padctl, "usb3", index);
 514         if (port)
 515                 return to_usb3_port(port);
 516
 517         return NULL;
 518 }
 519
 520 static void tegra_xusb_port_release(struct device *dev)
 521 {
 522         struct tegra_xusb_port *port = to_tegra_xusb_port(dev);
 523
 524         if (port->ops->release)
 525                 port->ops->release(port);
 526 }
 527
 528 static const struct device_type tegra_xusb_port_type = {
 529         .release = tegra_xusb_port_release,
 530 };
 531
 532 static int tegra_xusb_port_init(struct tegra_xusb_port *port,
 533                                 struct tegra_xusb_padctl *padctl,
 534                                 struct device_node *np,
 535                                 const char *name,
 536                                 unsigned int index)
 537 {
 538         int err;
 539
 540         INIT_LIST_HEAD(&port->list);
 541         port->padctl = padctl;
 542         port->index = index;
 543
 544         device_initialize(&port->dev);
 545         port->dev.type = &tegra_xusb_port_type;
 546         port->dev.of_node = of_node_get(np);
 547         port->dev.parent = padctl->dev;
 548
 549         err = dev_set_name(&port->dev, "%s-%u", name, index);
 550         if (err < 0)
 551                 goto unregister;
 552
 553         err = device_add(&port->dev);
 554         if (err < 0)
 555                 goto unregister;
 556
 557         return 0;
 558
 559 unregister:
 560         device_unregister(&port->dev);
 561         return err;
 562 }
 563
 564 static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
 565 {
 566         if (!IS_ERR_OR_NULL(port->usb_role_sw)) {
 567                 of_platform_depopulate(&port->dev);
 568                 usb_role_switch_unregister(port->usb_role_sw);
 569                 cancel_work_sync(&port->usb_phy_work);
 570                 usb_remove_phy(&port->usb_phy);
 571                 port->usb_phy.dev->driver = NULL;
 572         }
 573
 574         if (port->ops->remove)
 575                 port->ops->remove(port);
 576
 577         device_unregister(&port->dev);
 578 }
 579
 580 static const char *const modes[] = {
 581         [USB_DR_MODE_UNKNOWN] = "",
 582         [USB_DR_MODE_HOST] = "host",
 583         [USB_DR_MODE_PERIPHERAL] = "peripheral",
 584         [USB_DR_MODE_OTG] = "otg",
 585 };
 586
 587 static const char * const usb_roles[] = {
 588         [USB_ROLE_NONE]         = "none",
 589         [USB_ROLE_HOST]         = "host",
 590         [USB_ROLE_DEVICE]       = "device",
 591 };
 592
 593 static enum usb_phy_events to_usb_phy_event(enum usb_role role)
 594 {
 595         switch (role) {
 596         case USB_ROLE_DEVICE:
 597                 return USB_EVENT_VBUS;
 598
 599         case USB_ROLE_HOST:
 600                 return USB_EVENT_ID;
 601
 602         default:
 603                 return USB_EVENT_NONE;
 604         }
 605 }
 606
 607 static void tegra_xusb_usb_phy_work(struct work_struct *work)
 608 {
 609         struct tegra_xusb_port *port = container_of(work,
 610                                                     struct tegra_xusb_port,
 611                                                     usb_phy_work);
 612         enum usb_role role = usb_role_switch_get_role(port->usb_role_sw);
 613
 614         usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role));
 615
 616         dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__,
 617                 usb_roles[role]);
 618
 619         atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy);
 620 }
 621
 622 static int tegra_xusb_role_sw_set(struct usb_role_switch *sw,
 623                                   enum usb_role role)
 624 {
 625         struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw);
 626
 627         dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]);
 628
 629         schedule_work(&port->usb_phy_work);
 630
 631         return 0;
 632 }
 633
 634 static int tegra_xusb_set_peripheral(struct usb_otg *otg,
 635                                      struct usb_gadget *gadget)
 636 {
 637         struct tegra_xusb_port *port = container_of(otg->usb_phy,
 638                                                     struct tegra_xusb_port,
 639                                                     usb_phy);
 640
 641         if (gadget != NULL)
 642                 schedule_work(&port->usb_phy_work);
 643
 644         return 0;
 645 }
 646
 647 static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host)
 648 {
 649         struct tegra_xusb_port *port = container_of(otg->usb_phy,
 650                                                     struct tegra_xusb_port,
 651                                                     usb_phy);
 652
 653         if (host != NULL)
 654                 schedule_work(&port->usb_phy_work);
 655
 656         return 0;
 657 }
 658
 659
 660 static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port)
 661 {
 662         struct tegra_xusb_lane *lane;
 663         struct usb_role_switch_desc role_sx_desc = {
 664                 .fwnode = dev_fwnode(&port->dev),
 665                 .set = tegra_xusb_role_sw_set,
 666                 .allow_userspace_control = true,
 667         };
 668         int err = 0;
 669
 670         /*
 671          * USB role switch driver needs parent driver owner info. This is a
 672          * suboptimal solution. TODO: Need to revisit this in a follow-up patch
 673          * where an optimal solution is possible with changes to USB role
 674          * switch driver.
 675          */
 676         port->dev.driver = devm_kzalloc(&port->dev,
 677                                         sizeof(struct device_driver),
 678                                         GFP_KERNEL);
 679         if (!port->dev.driver)
 680                 return -ENOMEM;
 681
 682         port->dev.driver->owner  = THIS_MODULE;
 683
 684         port->usb_role_sw = usb_role_switch_register(&port->dev,
 685                                                      &role_sx_desc);
 686         if (IS_ERR(port->usb_role_sw)) {
 687                 err = PTR_ERR(port->usb_role_sw);
 688                 dev_err(&port->dev, "failed to register USB role switch: %d",
 689                         err);
 690                 return err;
 691         }
 692
 693         INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work);
 694         usb_role_switch_set_drvdata(port->usb_role_sw, port);
 695
 696         port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg),
 697                                          GFP_KERNEL);
 698         if (!port->usb_phy.otg)
 699                 return -ENOMEM;
 700
 701         lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index);
 702
 703         /*
 704          * Assign phy dev to usb-phy dev. Host/device drivers can use phy
 705          * reference to retrieve usb-phy details.
 706          */
 707         port->usb_phy.dev = &lane->pad->lanes[port->index]->dev;
 708         port->usb_phy.dev->driver = port->dev.driver;
 709         port->usb_phy.otg->usb_phy = &port->usb_phy;
 710         port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral;
 711         port->usb_phy.otg->set_host = tegra_xusb_set_host;
 712
 713         err = usb_add_phy_dev(&port->usb_phy);
 714         if (err < 0) {
 715                 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err);
 716                 return err;
 717         }
 718
 719         /* populate connector entry */
 720         of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev);
 721
 722         return err;
 723 }
 724
 725 static void tegra_xusb_parse_usb_role_default_mode(struct tegra_xusb_port *port)
 726 {
 727         enum usb_role role = USB_ROLE_NONE;
 728         enum usb_dr_mode mode = usb_get_role_switch_default_mode(&port->dev);
 729
 730         if (mode == USB_DR_MODE_HOST)
 731                 role = USB_ROLE_HOST;
 732         else if (mode == USB_DR_MODE_PERIPHERAL)
 733                 role = USB_ROLE_DEVICE;
 734
 735         if (role != USB_ROLE_NONE) {
 736                 usb_role_switch_set_role(port->usb_role_sw, role);
 737                 dev_dbg(&port->dev, "usb role default mode is %s", modes[mode]);
 738         }
 739 }
 740
 741 static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
 742 {
 743         struct tegra_xusb_port *port = &usb2->base;
 744         struct device_node *np = port->dev.of_node;
 745         const char *mode;
 746         int err;
 747
 748         usb2->internal = of_property_read_bool(np, "nvidia,internal");
 749
 750         if (!of_property_read_string(np, "mode", &mode)) {
 751                 int err = match_string(modes, ARRAY_SIZE(modes), mode);
 752                 if (err < 0) {
 753                         dev_err(&port->dev, "invalid value %s for \"mode\"\n",
 754                                 mode);
 755                         usb2->mode = USB_DR_MODE_UNKNOWN;
 756                 } else {
 757                         usb2->mode = err;
 758                 }
 759         } else {
 760                 usb2->mode = USB_DR_MODE_HOST;
 761         }
 762
 763         /* usb-role-switch property is mandatory for OTG/Peripheral modes */
 764         if (usb2->mode == USB_DR_MODE_PERIPHERAL ||
 765             usb2->mode == USB_DR_MODE_OTG) {
 766                 if (of_property_read_bool(np, "usb-role-switch")) {
 767                         err = tegra_xusb_setup_usb_role_switch(port);
 768                         if (err < 0)
 769                                 return err;
 770                         tegra_xusb_parse_usb_role_default_mode(port);
 771                 } else {
 772                         dev_err(&port->dev, "usb-role-switch not found for %s mode",
 773                                 modes[usb2->mode]);
 774                         return -EINVAL;
 775                 }
 776         }
 777
 778         usb2->supply = regulator_get(&port->dev, "vbus");
 779         return PTR_ERR_OR_ZERO(usb2->supply);
 780 }
 781
 782 static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
 783                                     unsigned int index)
 784 {
 785         struct tegra_xusb_usb2_port *usb2;
 786         struct device_node *np;
 787         int err = 0;
 788
 789         /*
 790          * USB2 ports don't require additional properties, but if the port is
 791          * marked as disabled there is no reason to register it.
 792          */
 793         np = tegra_xusb_find_port_node(padctl, "usb2", index);
 794         if (!np || !of_device_is_available(np))
 795                 goto out;
 796
 797         usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL);
 798         if (!usb2) {
 799                 err = -ENOMEM;
 800                 goto out;
 801         }
 802
 803         err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
 804         if (err < 0)
 805                 goto out;
 806
 807         usb2->base.ops = padctl->soc->ports.usb2.ops;
 808
 809         usb2->base.lane = usb2->base.ops->map(&usb2->base);
 810         if (IS_ERR(usb2->base.lane)) {
 811                 err = PTR_ERR(usb2->base.lane);
 812                 tegra_xusb_port_unregister(&usb2->base);
 813                 goto out;
 814         }
 815
 816         err = tegra_xusb_usb2_port_parse_dt(usb2);
 817         if (err < 0) {
 818                 tegra_xusb_port_unregister(&usb2->base);
 819                 goto out;
 820         }
 821
 822         list_add_tail(&usb2->base.list, &padctl->ports);
 823
 824 out:
 825         of_node_put(np);
 826         return err;
 827 }
 828
 829 void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port)
 830 {
 831         struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
 832
 833         kfree(usb2);
 834 }
 835
 836 void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port)
 837 {
 838         struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port);
 839
 840         regulator_put(usb2->supply);
 841 }
 842
 843 static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
 844 {
 845         struct tegra_xusb_port *port = &ulpi->base;
 846         struct device_node *np = port->dev.of_node;
 847
 848         ulpi->internal = of_property_read_bool(np, "nvidia,internal");
 849
 850         return 0;
 851 }
 852
 853 static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
 854                                     unsigned int index)
 855 {
 856         struct tegra_xusb_ulpi_port *ulpi;
 857         struct device_node *np;
 858         int err = 0;
 859
 860         np = tegra_xusb_find_port_node(padctl, "ulpi", index);
 861         if (!np || !of_device_is_available(np))
 862                 goto out;
 863
 864         ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL);
 865         if (!ulpi) {
 866                 err = -ENOMEM;
 867                 goto out;
 868         }
 869
 870         err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
 871         if (err < 0)
 872                 goto out;
 873
 874         ulpi->base.ops = padctl->soc->ports.ulpi.ops;
 875
 876         ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
 877         if (IS_ERR(ulpi->base.lane)) {
 878                 err = PTR_ERR(ulpi->base.lane);
 879                 tegra_xusb_port_unregister(&ulpi->base);
 880                 goto out;
 881         }
 882
 883         err = tegra_xusb_ulpi_port_parse_dt(ulpi);
 884         if (err < 0) {
 885                 tegra_xusb_port_unregister(&ulpi->base);
 886                 goto out;
 887         }
 888
 889         list_add_tail(&ulpi->base.list, &padctl->ports);
 890
 891 out:
 892         of_node_put(np);
 893         return err;
 894 }
 895
 896 void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port)
 897 {
 898         struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port);
 899
 900         kfree(ulpi);
 901 }
 902
 903 static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
 904 {
 905         /* XXX */
 906         return 0;
 907 }
 908
 909 static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
 910                                     unsigned int index)
 911 {
 912         struct tegra_xusb_hsic_port *hsic;
 913         struct device_node *np;
 914         int err = 0;
 915
 916         np = tegra_xusb_find_port_node(padctl, "hsic", index);
 917         if (!np || !of_device_is_available(np))
 918                 goto out;
 919
 920         hsic = kzalloc(sizeof(*hsic), GFP_KERNEL);
 921         if (!hsic) {
 922                 err = -ENOMEM;
 923                 goto out;
 924         }
 925
 926         err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
 927         if (err < 0)
 928                 goto out;
 929
 930         hsic->base.ops = padctl->soc->ports.hsic.ops;
 931
 932         hsic->base.lane = hsic->base.ops->map(&hsic->base);
 933         if (IS_ERR(hsic->base.lane)) {
 934                 err = PTR_ERR(hsic->base.lane);
 935                 goto out;
 936         }
 937
 938         err = tegra_xusb_hsic_port_parse_dt(hsic);
 939         if (err < 0) {
 940                 tegra_xusb_port_unregister(&hsic->base);
 941                 goto out;
 942         }
 943
 944         list_add_tail(&hsic->base.list, &padctl->ports);
 945
 946 out:
 947         of_node_put(np);
 948         return err;
 949 }
 950
 951 void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port)
 952 {
 953         struct tegra_xusb_hsic_port *hsic = to_hsic_port(port);
 954
 955         kfree(hsic);
 956 }
 957
 958 static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
 959 {
 960         struct tegra_xusb_port *port = &usb3->base;
 961         struct device_node *np = port->dev.of_node;
 962         enum usb_device_speed maximum_speed;
 963         u32 value;
 964         int err;
 965
 966         err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
 967         if (err < 0) {
 968                 dev_err(&port->dev, "failed to read port: %d\n", err);
 969                 return err;
 970         }
 971
 972         usb3->port = value;
 973
 974         usb3->internal = of_property_read_bool(np, "nvidia,internal");
 975
 976         if (device_property_present(&port->dev, "maximum-speed")) {
 977                 maximum_speed =  usb_get_maximum_speed(&port->dev);
 978                 if (maximum_speed == USB_SPEED_SUPER)
 979                         usb3->disable_gen2 = true;
 980                 else if (maximum_speed == USB_SPEED_SUPER_PLUS)
 981                         usb3->disable_gen2 = false;
 982                 else
 983                         return -EINVAL;
 984         }
 985
 986         return 0;
 987 }
 988
 989 static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
 990                                     unsigned int index)
 991 {
 992         struct tegra_xusb_usb3_port *usb3;
 993         struct device_node *np;
 994         int err = 0;
 995
 996         /*
 997          * If there is no supplemental configuration in the device tree the
 998          * port is unusable. But it is valid to configure only a single port,
 999          * hence return 0 instead of an error to allow ports to be optional.
1000          */
1001         np = tegra_xusb_find_port_node(padctl, "usb3", index);
1002         if (!np || !of_device_is_available(np))
1003                 goto out;
1004
1005         usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL);
1006         if (!usb3) {
1007                 err = -ENOMEM;
1008                 goto out;
1009         }
1010
1011         err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
1012         if (err < 0)
1013                 goto out;
1014
1015         usb3->base.ops = padctl->soc->ports.usb3.ops;
1016
1017         usb3->base.lane = usb3->base.ops->map(&usb3->base);
1018         if (IS_ERR(usb3->base.lane)) {
1019                 err = PTR_ERR(usb3->base.lane);
1020                 goto out;
1021         }
1022
1023         err = tegra_xusb_usb3_port_parse_dt(usb3);
1024         if (err < 0) {
1025                 tegra_xusb_port_unregister(&usb3->base);
1026                 goto out;
1027         }
1028
1029         list_add_tail(&usb3->base.list, &padctl->ports);
1030
1031 out:
1032         of_node_put(np);
1033         return err;
1034 }
1035
1036 void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port)
1037 {
1038         struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port);
1039
1040         kfree(usb3);
1041 }
1042
1043 static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1044 {
1045         struct tegra_xusb_port *port, *tmp;
1046
1047         list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
1048                 list_del(&port->list);
1049                 tegra_xusb_port_unregister(port);
1050         }
1051 }
1052
1053 static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl)
1054 {
1055         struct device_node *np;
1056         unsigned int i;
1057
1058         for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1059                 np = tegra_xusb_find_port_node(padctl, "usb3", i);
1060                 if (!np || !of_device_is_available(np))
1061                         return i;
1062         }
1063
1064         return -ENODEV;
1065 }
1066
1067 static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2)
1068 {
1069         unsigned int i;
1070         struct tegra_xusb_usb3_port *usb3;
1071         struct tegra_xusb_padctl *padctl = usb2->base.padctl;
1072
1073         for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1074                 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1075                 if (usb3 && usb3->port == usb2->base.index)
1076                         return true;
1077         }
1078
1079         return false;
1080 }
1081
1082 static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2)
1083 {
1084         int fake;
1085
1086         /* Disable usb3_port_fake usage by default and assign if needed */
1087         usb2->usb3_port_fake = -1;
1088
1089         if ((usb2->mode == USB_DR_MODE_OTG ||
1090              usb2->mode == USB_DR_MODE_PERIPHERAL) &&
1091                 !tegra_xusb_port_is_companion(usb2)) {
1092                 fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl);
1093                 if (fake < 0) {
1094                         dev_err(&usb2->base.dev, "no unused USB3 ports available\n");
1095                         return -ENODEV;
1096                 }
1097
1098                 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake);
1099                 usb2->usb3_port_fake = fake;
1100         }
1101
1102         return 0;
1103 }
1104
1105 static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
1106 {
1107         struct tegra_xusb_port *port;
1108         struct tegra_xusb_usb2_port *usb2;
1109         unsigned int i;
1110         int err = 0;
1111
1112         mutex_lock(&padctl->lock);
1113
1114         for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1115                 err = tegra_xusb_add_usb2_port(padctl, i);
1116                 if (err < 0)
1117                         goto remove_ports;
1118         }
1119
1120         for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
1121                 err = tegra_xusb_add_ulpi_port(padctl, i);
1122                 if (err < 0)
1123                         goto remove_ports;
1124         }
1125
1126         for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
1127                 err = tegra_xusb_add_hsic_port(padctl, i);
1128                 if (err < 0)
1129                         goto remove_ports;
1130         }
1131
1132         for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1133                 err = tegra_xusb_add_usb3_port(padctl, i);
1134                 if (err < 0)
1135                         goto remove_ports;
1136         }
1137
1138         if (padctl->soc->need_fake_usb3_port) {
1139                 for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
1140                         usb2 = tegra_xusb_find_usb2_port(padctl, i);
1141                         if (!usb2)
1142                                 continue;
1143
1144                         err = tegra_xusb_update_usb3_fake_port(usb2);
1145                         if (err < 0)
1146                                 goto remove_ports;
1147                 }
1148         }
1149
1150         list_for_each_entry(port, &padctl->ports, list) {
1151                 err = port->ops->enable(port);
1152                 if (err < 0)
1153                         dev_err(padctl->dev, "failed to enable port %s: %d\n",
1154                                 dev_name(&port->dev), err);
1155         }
1156
1157         goto unlock;
1158
1159 remove_ports:
1160         __tegra_xusb_remove_ports(padctl);
1161 unlock:
1162         mutex_unlock(&padctl->lock);
1163         return err;
1164 }
1165
1166 static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
1167 {
1168         mutex_lock(&padctl->lock);
1169         __tegra_xusb_remove_ports(padctl);
1170         mutex_unlock(&padctl->lock);
1171 }
1172
1173 static int tegra_xusb_padctl_probe(struct platform_device *pdev)
1174 {
1175         struct device_node *np = pdev->dev.of_node;
1176         const struct tegra_xusb_padctl_soc *soc;
1177         struct tegra_xusb_padctl *padctl;
1178         const struct of_device_id *match;
1179         int err;
1180
1181         /* for backwards compatibility with old device trees */
1182         np = of_get_child_by_name(np, "pads");
1183         if (!np) {
1184                 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
1185                 return tegra_xusb_padctl_legacy_probe(pdev);
1186         }
1187
1188         of_node_put(np);
1189
1190         match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
1191         soc = match->data;
1192
1193         padctl = soc->ops->probe(&pdev->dev, soc);
1194         if (IS_ERR(padctl))
1195                 return PTR_ERR(padctl);
1196
1197         platform_set_drvdata(pdev, padctl);
1198         INIT_LIST_HEAD(&padctl->ports);
1199         INIT_LIST_HEAD(&padctl->lanes);
1200         INIT_LIST_HEAD(&padctl->pads);
1201         mutex_init(&padctl->lock);
1202
1203         padctl->regs = devm_platform_ioremap_resource(pdev, 0);
1204         if (IS_ERR(padctl->regs)) {
1205                 err = PTR_ERR(padctl->regs);
1206                 goto remove;
1207         }
1208
1209         padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
1210         if (IS_ERR(padctl->rst)) {
1211                 err = PTR_ERR(padctl->rst);
1212                 goto remove;
1213         }
1214
1215         padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
1216                                         sizeof(*padctl->supplies), GFP_KERNEL);
1217         if (!padctl->supplies) {
1218                 err = -ENOMEM;
1219                 goto remove;
1220         }
1221
1222         regulator_bulk_set_supply_names(padctl->supplies,
1223                                         padctl->soc->supply_names,
1224                                         padctl->soc->num_supplies);
1225
1226         err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
1227                                       padctl->supplies);
1228         if (err < 0) {
1229                 dev_err_probe(&pdev->dev, err, "failed to get regulators\n");
1230                 goto remove;
1231         }
1232
1233         err = reset_control_deassert(padctl->rst);
1234         if (err < 0)
1235                 goto remove;
1236
1237         err = regulator_bulk_enable(padctl->soc->num_supplies,
1238                                     padctl->supplies);
1239         if (err < 0) {
1240                 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
1241                 goto reset;
1242         }
1243
1244         err = tegra_xusb_setup_pads(padctl);
1245         if (err < 0) {
1246                 dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
1247                 goto power_down;
1248         }
1249
1250         err = tegra_xusb_setup_ports(padctl);
1251         if (err) {
1252                 const char *level = KERN_ERR;
1253
1254                 if (err == -EPROBE_DEFER)
1255                         level = KERN_DEBUG;
1256
1257                 dev_printk(level, &pdev->dev,
1258                            dev_fmt("failed to setup XUSB ports: %d\n"), err);
1259                 goto remove_pads;
1260         }
1261
1262         return 0;
1263
1264 remove_pads:
1265         tegra_xusb_remove_pads(padctl);
1266 power_down:
1267         regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
1268 reset:
1269         reset_control_assert(padctl->rst);
1270 remove:
1271         platform_set_drvdata(pdev, NULL);
1272         soc->ops->remove(padctl);
1273         return err;
1274 }
1275
1276 static void tegra_xusb_padctl_remove(struct platform_device *pdev)
1277 {
1278         struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
1279         int err;
1280
1281         tegra_xusb_remove_ports(padctl);
1282         tegra_xusb_remove_pads(padctl);
1283
1284         err = regulator_bulk_disable(padctl->soc->num_supplies,
1285                                      padctl->supplies);
1286         if (err < 0)
1287                 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
1288
1289         err = reset_control_assert(padctl->rst);
1290         if (err < 0)
1291                 dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
1292
1293         padctl->soc->ops->remove(padctl);
1294 }
1295
1296 static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev)
1297 {
1298         struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1299
1300         if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq)
1301                 return padctl->soc->ops->suspend_noirq(padctl);
1302
1303         return 0;
1304 }
1305
1306 static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev)
1307 {
1308         struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
1309
1310         if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq)
1311                 return padctl->soc->ops->resume_noirq(padctl);
1312
1313         return 0;
1314 }
1315
1316 static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = {
1317         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq,
1318                                       tegra_xusb_padctl_resume_noirq)
1319 };
1320
1321 static struct platform_driver tegra_xusb_padctl_driver = {
1322         .driver = {
1323                 .name = "tegra-xusb-padctl",
1324                 .of_match_table = tegra_xusb_padctl_of_match,
1325                 .pm = &tegra_xusb_padctl_pm_ops,
1326         },
1327         .probe = tegra_xusb_padctl_probe,
1328         .remove_new = tegra_xusb_padctl_remove,
1329 };
1330 module_platform_driver(tegra_xusb_padctl_driver);
1331
1332 struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
1333 {
1334         struct tegra_xusb_padctl *padctl;
1335         struct platform_device *pdev;
1336         struct device_node *np;
1337
1338         np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
1339         if (!np)
1340                 return ERR_PTR(-EINVAL);
1341
1342         /*
1343          * This is slightly ugly. A better implementation would be to keep a
1344          * registry of pad controllers, but since there will almost certainly
1345          * only ever be one per SoC that would be a little overkill.
1346          */
1347         pdev = of_find_device_by_node(np);
1348         if (!pdev) {
1349                 of_node_put(np);
1350                 return ERR_PTR(-ENODEV);
1351         }
1352
1353         of_node_put(np);
1354
1355         padctl = platform_get_drvdata(pdev);
1356         if (!padctl) {
1357                 put_device(&pdev->dev);
1358                 return ERR_PTR(-EPROBE_DEFER);
1359         }
1360
1361         return padctl;
1362 }
1363 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
1364
1365 void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
1366 {
1367         if (padctl)
1368                 put_device(padctl->dev);
1369 }
1370 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
1371
1372 int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
1373                                         unsigned int port)
1374 {
1375         if (padctl->soc->ops->usb3_save_context)
1376                 return padctl->soc->ops->usb3_save_context(padctl, port);
1377
1378         return -ENOSYS;
1379 }
1380 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
1381
1382 int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
1383                                     unsigned int port, bool idle)
1384 {
1385         if (padctl->soc->ops->hsic_set_idle)
1386                 return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
1387
1388         return -ENOSYS;
1389 }
1390 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
1391
1392 int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
1393                                            enum usb_device_speed speed)
1394 {
1395         struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1396
1397         if (lane->pad->ops->enable_phy_sleepwalk)
1398                 return lane->pad->ops->enable_phy_sleepwalk(lane, speed);
1399
1400         return -EOPNOTSUPP;
1401 }
1402 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk);
1403
1404 int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy)
1405 {
1406         struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1407
1408         if (lane->pad->ops->disable_phy_sleepwalk)
1409                 return lane->pad->ops->disable_phy_sleepwalk(lane);
1410
1411         return -EOPNOTSUPP;
1412 }
1413 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk);
1414
1415 int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1416 {
1417         struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1418
1419         if (lane->pad->ops->enable_phy_wake)
1420                 return lane->pad->ops->enable_phy_wake(lane);
1421
1422         return -EOPNOTSUPP;
1423 }
1424 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake);
1425
1426 int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
1427 {
1428         struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1429
1430         if (lane->pad->ops->disable_phy_wake)
1431                 return lane->pad->ops->disable_phy_wake(lane);
1432
1433         return -EOPNOTSUPP;
1434 }
1435 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake);
1436
1437 bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy)
1438 {
1439         struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1440
1441         if (lane->pad->ops->remote_wake_detected)
1442                 return lane->pad->ops->remote_wake_detected(lane);
1443
1444         return false;
1445 }
1446 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected);
1447
1448 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
1449                                            unsigned int port, bool enable)
1450 {
1451         if (padctl->soc->ops->usb3_set_lfps_detect)
1452                 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
1453                                                               enable);
1454
1455         return -ENOSYS;
1456 }
1457 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
1458
1459 int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
1460                                                         bool val)
1461 {
1462         if (padctl->soc->ops->vbus_override)
1463                 return padctl->soc->ops->vbus_override(padctl, val);
1464
1465         return -ENOTSUPP;
1466 }
1467 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override);
1468
1469 int tegra_phy_xusb_utmi_port_reset(struct phy *phy)
1470 {
1471         struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
1472         struct tegra_xusb_padctl *padctl = lane->pad->padctl;
1473
1474         if (padctl->soc->ops->utmi_port_reset)
1475                 return padctl->soc->ops->utmi_port_reset(phy);
1476
1477         return -ENOTSUPP;
1478 }
1479 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset);
1480
1481 void tegra_phy_xusb_utmi_pad_power_on(struct phy *phy)
1482 {
1483         struct tegra_xusb_lane *lane;
1484         struct tegra_xusb_padctl *padctl;
1485
1486         if (!phy)
1487                 return;
1488
1489         lane = phy_get_drvdata(phy);
1490         padctl = lane->pad->padctl;
1491
1492         if (padctl->soc->ops->utmi_pad_power_on)
1493                 padctl->soc->ops->utmi_pad_power_on(phy);
1494 }
1495 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_on);
1496
1497 void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy)
1498 {
1499         struct tegra_xusb_lane *lane;
1500         struct tegra_xusb_padctl *padctl;
1501
1502         if (!phy)
1503                 return;
1504
1505         lane = phy_get_drvdata(phy);
1506         padctl = lane->pad->padctl;
1507
1508         if (padctl->soc->ops->utmi_pad_power_down)
1509                 padctl->soc->ops->utmi_pad_power_down(phy);
1510 }
1511 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_down);
1512
1513 int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
1514                                     unsigned int port)
1515 {
1516         struct tegra_xusb_usb2_port *usb2;
1517         struct tegra_xusb_usb3_port *usb3;
1518         int i;
1519
1520         usb2 = tegra_xusb_find_usb2_port(padctl, port);
1521         if (!usb2)
1522                 return -EINVAL;
1523
1524         for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
1525                 usb3 = tegra_xusb_find_usb3_port(padctl, i);
1526                 if (usb3 && usb3->port == usb2->base.index)
1527                         return usb3->base.index;
1528         }
1529
1530         return -ENODEV;
1531 }
1532 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion);
1533
1534 int tegra_xusb_padctl_get_port_number(struct phy *phy)
1535 {
1536         struct tegra_xusb_lane *lane;
1537
1538         if (!phy)
1539                 return -ENODEV;
1540
1541         lane = phy_get_drvdata(phy);
1542
1543         return lane->index;
1544 }
1545 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_port_number);
1546
1547 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
1548 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
1549 MODULE_LICENSE("GPL v2");