1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014-2020, 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_device.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 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 { } 76 }; 77 MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match); 78 79 static struct device_node * 80 tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name) 81 { 82 struct device_node *pads, *np; 83 84 pads = of_get_child_by_name(padctl->dev->of_node, "pads"); 85 if (!pads) 86 return NULL; 87 88 np = of_get_child_by_name(pads, name); 89 of_node_put(pads); 90 91 return np; 92 } 93 94 static struct device_node * 95 tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index) 96 { 97 struct device_node *np, *lanes; 98 99 lanes = of_get_child_by_name(pad->dev.of_node, "lanes"); 100 if (!lanes) 101 return NULL; 102 103 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name); 104 of_node_put(lanes); 105 106 return np; 107 } 108 109 int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane, 110 struct device_node *np) 111 { 112 struct device *dev = &lane->pad->dev; 113 const char *function; 114 int err; 115 116 err = of_property_read_string(np, "nvidia,function", &function); 117 if (err < 0) 118 return err; 119 120 err = match_string(lane->soc->funcs, lane->soc->num_funcs, function); 121 if (err < 0) { 122 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n", 123 function, np); 124 return err; 125 } 126 127 lane->function = err; 128 129 return 0; 130 } 131 132 static void tegra_xusb_lane_destroy(struct phy *phy) 133 { 134 if (phy) { 135 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 136 137 lane->pad->ops->remove(lane); 138 phy_destroy(phy); 139 } 140 } 141 142 static void tegra_xusb_pad_release(struct device *dev) 143 { 144 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev); 145 146 pad->soc->ops->remove(pad); 147 } 148 149 static const struct device_type tegra_xusb_pad_type = { 150 .release = tegra_xusb_pad_release, 151 }; 152 153 int tegra_xusb_pad_init(struct tegra_xusb_pad *pad, 154 struct tegra_xusb_padctl *padctl, 155 struct device_node *np) 156 { 157 int err; 158 159 device_initialize(&pad->dev); 160 INIT_LIST_HEAD(&pad->list); 161 pad->dev.parent = padctl->dev; 162 pad->dev.type = &tegra_xusb_pad_type; 163 pad->dev.of_node = np; 164 pad->padctl = padctl; 165 166 err = dev_set_name(&pad->dev, "%s", pad->soc->name); 167 if (err < 0) 168 goto unregister; 169 170 err = device_add(&pad->dev); 171 if (err < 0) 172 goto unregister; 173 174 return 0; 175 176 unregister: 177 device_unregister(&pad->dev); 178 return err; 179 } 180 181 int tegra_xusb_pad_register(struct tegra_xusb_pad *pad, 182 const struct phy_ops *ops) 183 { 184 struct device_node *children; 185 struct phy *lane; 186 unsigned int i; 187 int err; 188 189 children = of_get_child_by_name(pad->dev.of_node, "lanes"); 190 if (!children) 191 return -ENODEV; 192 193 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane), 194 GFP_KERNEL); 195 if (!pad->lanes) { 196 of_node_put(children); 197 return -ENOMEM; 198 } 199 200 for (i = 0; i < pad->soc->num_lanes; i++) { 201 struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i); 202 struct tegra_xusb_lane *lane; 203 204 /* skip disabled lanes */ 205 if (!np || !of_device_is_available(np)) { 206 of_node_put(np); 207 continue; 208 } 209 210 pad->lanes[i] = phy_create(&pad->dev, np, ops); 211 if (IS_ERR(pad->lanes[i])) { 212 err = PTR_ERR(pad->lanes[i]); 213 of_node_put(np); 214 goto remove; 215 } 216 217 lane = pad->ops->probe(pad, np, i); 218 if (IS_ERR(lane)) { 219 phy_destroy(pad->lanes[i]); 220 err = PTR_ERR(lane); 221 goto remove; 222 } 223 224 list_add_tail(&lane->list, &pad->padctl->lanes); 225 phy_set_drvdata(pad->lanes[i], lane); 226 } 227 228 pad->provider = of_phy_provider_register_full(&pad->dev, children, 229 tegra_xusb_pad_of_xlate); 230 if (IS_ERR(pad->provider)) { 231 err = PTR_ERR(pad->provider); 232 goto remove; 233 } 234 235 return 0; 236 237 remove: 238 while (i--) 239 tegra_xusb_lane_destroy(pad->lanes[i]); 240 241 of_node_put(children); 242 243 return err; 244 } 245 246 void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad) 247 { 248 unsigned int i = pad->soc->num_lanes; 249 250 of_phy_provider_unregister(pad->provider); 251 252 while (i--) 253 tegra_xusb_lane_destroy(pad->lanes[i]); 254 255 device_unregister(&pad->dev); 256 } 257 258 static struct tegra_xusb_pad * 259 tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl, 260 const struct tegra_xusb_pad_soc *soc) 261 { 262 struct tegra_xusb_pad *pad; 263 struct device_node *np; 264 int err; 265 266 np = tegra_xusb_find_pad_node(padctl, soc->name); 267 if (!np || !of_device_is_available(np)) 268 return NULL; 269 270 pad = soc->ops->probe(padctl, soc, np); 271 if (IS_ERR(pad)) { 272 err = PTR_ERR(pad); 273 dev_err(padctl->dev, "failed to create pad %s: %d\n", 274 soc->name, err); 275 return ERR_PTR(err); 276 } 277 278 /* XXX move this into ->probe() to avoid string comparison */ 279 if (strcmp(soc->name, "pcie") == 0) 280 padctl->pcie = pad; 281 282 if (strcmp(soc->name, "sata") == 0) 283 padctl->sata = pad; 284 285 if (strcmp(soc->name, "usb2") == 0) 286 padctl->usb2 = pad; 287 288 if (strcmp(soc->name, "ulpi") == 0) 289 padctl->ulpi = pad; 290 291 if (strcmp(soc->name, "hsic") == 0) 292 padctl->hsic = pad; 293 294 return pad; 295 } 296 297 static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl) 298 { 299 struct tegra_xusb_pad *pad, *tmp; 300 301 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) { 302 list_del(&pad->list); 303 tegra_xusb_pad_unregister(pad); 304 } 305 } 306 307 static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl) 308 { 309 mutex_lock(&padctl->lock); 310 __tegra_xusb_remove_pads(padctl); 311 mutex_unlock(&padctl->lock); 312 } 313 314 static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane) 315 { 316 struct tegra_xusb_padctl *padctl = lane->pad->padctl; 317 const struct tegra_xusb_lane_soc *soc = lane->soc; 318 u32 value; 319 320 /* skip single function lanes */ 321 if (soc->num_funcs < 2) 322 return; 323 324 if (lane->pad->ops->iddq_enable) 325 lane->pad->ops->iddq_enable(lane); 326 327 /* choose function */ 328 value = padctl_readl(padctl, soc->offset); 329 value &= ~(soc->mask << soc->shift); 330 value |= lane->function << soc->shift; 331 padctl_writel(padctl, value, soc->offset); 332 333 if (lane->pad->ops->iddq_disable) 334 lane->pad->ops->iddq_disable(lane); 335 } 336 337 static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad) 338 { 339 unsigned int i; 340 341 for (i = 0; i < pad->soc->num_lanes; i++) { 342 struct tegra_xusb_lane *lane; 343 344 if (pad->lanes[i]) { 345 lane = phy_get_drvdata(pad->lanes[i]); 346 tegra_xusb_lane_program(lane); 347 } 348 } 349 } 350 351 static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl) 352 { 353 struct tegra_xusb_pad *pad; 354 unsigned int i; 355 356 mutex_lock(&padctl->lock); 357 358 for (i = 0; i < padctl->soc->num_pads; i++) { 359 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i]; 360 int err; 361 362 pad = tegra_xusb_pad_create(padctl, soc); 363 if (IS_ERR(pad)) { 364 err = PTR_ERR(pad); 365 dev_err(padctl->dev, "failed to create pad %s: %d\n", 366 soc->name, err); 367 __tegra_xusb_remove_pads(padctl); 368 mutex_unlock(&padctl->lock); 369 return err; 370 } 371 372 if (!pad) 373 continue; 374 375 list_add_tail(&pad->list, &padctl->pads); 376 } 377 378 list_for_each_entry(pad, &padctl->pads, list) 379 tegra_xusb_pad_program(pad); 380 381 mutex_unlock(&padctl->lock); 382 return 0; 383 } 384 385 bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane, 386 const char *function) 387 { 388 const char *func = lane->soc->funcs[lane->function]; 389 390 return strcmp(function, func) == 0; 391 } 392 393 struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl, 394 const char *type, 395 unsigned int index) 396 { 397 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV); 398 char *name; 399 400 name = kasprintf(GFP_KERNEL, "%s-%u", type, index); 401 if (!name) 402 return ERR_PTR(-ENOMEM); 403 404 list_for_each_entry(lane, &padctl->lanes, list) { 405 if (strcmp(lane->soc->name, name) == 0) { 406 hit = lane; 407 break; 408 } 409 } 410 411 kfree(name); 412 return hit; 413 } 414 415 struct tegra_xusb_lane * 416 tegra_xusb_port_find_lane(struct tegra_xusb_port *port, 417 const struct tegra_xusb_lane_map *map, 418 const char *function) 419 { 420 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV); 421 422 for (; map->type; map++) { 423 if (port->index != map->port) 424 continue; 425 426 lane = tegra_xusb_find_lane(port->padctl, map->type, 427 map->index); 428 if (IS_ERR(lane)) 429 continue; 430 431 if (!tegra_xusb_lane_check(lane, function)) 432 continue; 433 434 if (!IS_ERR(match)) 435 dev_err(&port->dev, "conflicting match: %s-%u / %s\n", 436 map->type, map->index, match->soc->name); 437 else 438 match = lane; 439 } 440 441 return match; 442 } 443 444 static struct device_node * 445 tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type, 446 unsigned int index) 447 { 448 struct device_node *ports, *np; 449 char *name; 450 451 ports = of_get_child_by_name(padctl->dev->of_node, "ports"); 452 if (!ports) 453 return NULL; 454 455 name = kasprintf(GFP_KERNEL, "%s-%u", type, index); 456 if (!name) { 457 of_node_put(ports); 458 return NULL; 459 } 460 np = of_get_child_by_name(ports, name); 461 kfree(name); 462 of_node_put(ports); 463 464 return np; 465 } 466 467 struct tegra_xusb_port * 468 tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type, 469 unsigned int index) 470 { 471 struct tegra_xusb_port *port; 472 struct device_node *np; 473 474 np = tegra_xusb_find_port_node(padctl, type, index); 475 if (!np) 476 return NULL; 477 478 list_for_each_entry(port, &padctl->ports, list) { 479 if (np == port->dev.of_node) { 480 of_node_put(np); 481 return port; 482 } 483 } 484 485 of_node_put(np); 486 487 return NULL; 488 } 489 490 struct tegra_xusb_usb2_port * 491 tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index) 492 { 493 struct tegra_xusb_port *port; 494 495 port = tegra_xusb_find_port(padctl, "usb2", index); 496 if (port) 497 return to_usb2_port(port); 498 499 return NULL; 500 } 501 502 struct tegra_xusb_usb3_port * 503 tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index) 504 { 505 struct tegra_xusb_port *port; 506 507 port = tegra_xusb_find_port(padctl, "usb3", index); 508 if (port) 509 return to_usb3_port(port); 510 511 return NULL; 512 } 513 514 static void tegra_xusb_port_release(struct device *dev) 515 { 516 struct tegra_xusb_port *port = to_tegra_xusb_port(dev); 517 518 if (port->ops->release) 519 port->ops->release(port); 520 } 521 522 static const struct device_type tegra_xusb_port_type = { 523 .release = tegra_xusb_port_release, 524 }; 525 526 static int tegra_xusb_port_init(struct tegra_xusb_port *port, 527 struct tegra_xusb_padctl *padctl, 528 struct device_node *np, 529 const char *name, 530 unsigned int index) 531 { 532 int err; 533 534 INIT_LIST_HEAD(&port->list); 535 port->padctl = padctl; 536 port->index = index; 537 538 device_initialize(&port->dev); 539 port->dev.type = &tegra_xusb_port_type; 540 port->dev.of_node = of_node_get(np); 541 port->dev.parent = padctl->dev; 542 543 err = dev_set_name(&port->dev, "%s-%u", name, index); 544 if (err < 0) 545 goto unregister; 546 547 err = device_add(&port->dev); 548 if (err < 0) 549 goto unregister; 550 551 return 0; 552 553 unregister: 554 device_unregister(&port->dev); 555 return err; 556 } 557 558 static void tegra_xusb_port_unregister(struct tegra_xusb_port *port) 559 { 560 if (!IS_ERR_OR_NULL(port->usb_role_sw)) { 561 of_platform_depopulate(&port->dev); 562 usb_role_switch_unregister(port->usb_role_sw); 563 cancel_work_sync(&port->usb_phy_work); 564 usb_remove_phy(&port->usb_phy); 565 } 566 567 if (port->ops->remove) 568 port->ops->remove(port); 569 570 device_unregister(&port->dev); 571 } 572 573 static const char *const modes[] = { 574 [USB_DR_MODE_UNKNOWN] = "", 575 [USB_DR_MODE_HOST] = "host", 576 [USB_DR_MODE_PERIPHERAL] = "peripheral", 577 [USB_DR_MODE_OTG] = "otg", 578 }; 579 580 static const char * const usb_roles[] = { 581 [USB_ROLE_NONE] = "none", 582 [USB_ROLE_HOST] = "host", 583 [USB_ROLE_DEVICE] = "device", 584 }; 585 586 static enum usb_phy_events to_usb_phy_event(enum usb_role role) 587 { 588 switch (role) { 589 case USB_ROLE_DEVICE: 590 return USB_EVENT_VBUS; 591 592 case USB_ROLE_HOST: 593 return USB_EVENT_ID; 594 595 default: 596 return USB_EVENT_NONE; 597 } 598 } 599 600 static void tegra_xusb_usb_phy_work(struct work_struct *work) 601 { 602 struct tegra_xusb_port *port = container_of(work, 603 struct tegra_xusb_port, 604 usb_phy_work); 605 enum usb_role role = usb_role_switch_get_role(port->usb_role_sw); 606 607 usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role)); 608 609 dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__, 610 usb_roles[role]); 611 612 atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy); 613 } 614 615 static int tegra_xusb_role_sw_set(struct usb_role_switch *sw, 616 enum usb_role role) 617 { 618 struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw); 619 620 dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]); 621 622 schedule_work(&port->usb_phy_work); 623 624 return 0; 625 } 626 627 static int tegra_xusb_set_peripheral(struct usb_otg *otg, 628 struct usb_gadget *gadget) 629 { 630 struct tegra_xusb_port *port = container_of(otg->usb_phy, 631 struct tegra_xusb_port, 632 usb_phy); 633 634 if (gadget != NULL) 635 schedule_work(&port->usb_phy_work); 636 637 return 0; 638 } 639 640 static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host) 641 { 642 struct tegra_xusb_port *port = container_of(otg->usb_phy, 643 struct tegra_xusb_port, 644 usb_phy); 645 646 if (host != NULL) 647 schedule_work(&port->usb_phy_work); 648 649 return 0; 650 } 651 652 653 static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port) 654 { 655 struct tegra_xusb_lane *lane; 656 struct usb_role_switch_desc role_sx_desc = { 657 .fwnode = dev_fwnode(&port->dev), 658 .set = tegra_xusb_role_sw_set, 659 }; 660 int err = 0; 661 662 /* 663 * USB role switch driver needs parent driver owner info. This is a 664 * suboptimal solution. TODO: Need to revisit this in a follow-up patch 665 * where an optimal solution is possible with changes to USB role 666 * switch driver. 667 */ 668 port->dev.driver = devm_kzalloc(&port->dev, 669 sizeof(struct device_driver), 670 GFP_KERNEL); 671 port->dev.driver->owner = THIS_MODULE; 672 673 port->usb_role_sw = usb_role_switch_register(&port->dev, 674 &role_sx_desc); 675 if (IS_ERR(port->usb_role_sw)) { 676 err = PTR_ERR(port->usb_role_sw); 677 dev_err(&port->dev, "failed to register USB role switch: %d", 678 err); 679 return err; 680 } 681 682 INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work); 683 usb_role_switch_set_drvdata(port->usb_role_sw, port); 684 685 port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg), 686 GFP_KERNEL); 687 if (!port->usb_phy.otg) 688 return -ENOMEM; 689 690 lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index); 691 692 /* 693 * Assign phy dev to usb-phy dev. Host/device drivers can use phy 694 * reference to retrieve usb-phy details. 695 */ 696 port->usb_phy.dev = &lane->pad->lanes[port->index]->dev; 697 port->usb_phy.dev->driver = port->dev.driver; 698 port->usb_phy.otg->usb_phy = &port->usb_phy; 699 port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral; 700 port->usb_phy.otg->set_host = tegra_xusb_set_host; 701 702 err = usb_add_phy_dev(&port->usb_phy); 703 if (err < 0) { 704 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err); 705 return err; 706 } 707 708 /* populate connector entry */ 709 of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev); 710 711 return err; 712 } 713 714 static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2) 715 { 716 struct tegra_xusb_port *port = &usb2->base; 717 struct device_node *np = port->dev.of_node; 718 const char *mode; 719 int err; 720 721 usb2->internal = of_property_read_bool(np, "nvidia,internal"); 722 723 if (!of_property_read_string(np, "mode", &mode)) { 724 int err = match_string(modes, ARRAY_SIZE(modes), mode); 725 if (err < 0) { 726 dev_err(&port->dev, "invalid value %s for \"mode\"\n", 727 mode); 728 usb2->mode = USB_DR_MODE_UNKNOWN; 729 } else { 730 usb2->mode = err; 731 } 732 } else { 733 usb2->mode = USB_DR_MODE_HOST; 734 } 735 736 /* usb-role-switch property is mandatory for OTG/Peripheral modes */ 737 if (usb2->mode == USB_DR_MODE_PERIPHERAL || 738 usb2->mode == USB_DR_MODE_OTG) { 739 if (of_property_read_bool(np, "usb-role-switch")) { 740 err = tegra_xusb_setup_usb_role_switch(port); 741 if (err < 0) 742 return err; 743 } else { 744 dev_err(&port->dev, "usb-role-switch not found for %s mode", 745 modes[usb2->mode]); 746 return -EINVAL; 747 } 748 } 749 750 usb2->supply = regulator_get(&port->dev, "vbus"); 751 return PTR_ERR_OR_ZERO(usb2->supply); 752 } 753 754 static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl, 755 unsigned int index) 756 { 757 struct tegra_xusb_usb2_port *usb2; 758 struct device_node *np; 759 int err = 0; 760 761 /* 762 * USB2 ports don't require additional properties, but if the port is 763 * marked as disabled there is no reason to register it. 764 */ 765 np = tegra_xusb_find_port_node(padctl, "usb2", index); 766 if (!np || !of_device_is_available(np)) 767 goto out; 768 769 usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL); 770 if (!usb2) { 771 err = -ENOMEM; 772 goto out; 773 } 774 775 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index); 776 if (err < 0) 777 goto out; 778 779 usb2->base.ops = padctl->soc->ports.usb2.ops; 780 781 usb2->base.lane = usb2->base.ops->map(&usb2->base); 782 if (IS_ERR(usb2->base.lane)) { 783 err = PTR_ERR(usb2->base.lane); 784 goto out; 785 } 786 787 err = tegra_xusb_usb2_port_parse_dt(usb2); 788 if (err < 0) { 789 tegra_xusb_port_unregister(&usb2->base); 790 goto out; 791 } 792 793 list_add_tail(&usb2->base.list, &padctl->ports); 794 795 out: 796 of_node_put(np); 797 return err; 798 } 799 800 void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port) 801 { 802 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); 803 804 kfree(usb2); 805 } 806 807 void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port) 808 { 809 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); 810 811 regulator_put(usb2->supply); 812 } 813 814 static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi) 815 { 816 struct tegra_xusb_port *port = &ulpi->base; 817 struct device_node *np = port->dev.of_node; 818 819 ulpi->internal = of_property_read_bool(np, "nvidia,internal"); 820 821 return 0; 822 } 823 824 static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl, 825 unsigned int index) 826 { 827 struct tegra_xusb_ulpi_port *ulpi; 828 struct device_node *np; 829 int err = 0; 830 831 np = tegra_xusb_find_port_node(padctl, "ulpi", index); 832 if (!np || !of_device_is_available(np)) 833 goto out; 834 835 ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL); 836 if (!ulpi) { 837 err = -ENOMEM; 838 goto out; 839 } 840 841 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index); 842 if (err < 0) 843 goto out; 844 845 ulpi->base.ops = padctl->soc->ports.ulpi.ops; 846 847 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base); 848 if (IS_ERR(ulpi->base.lane)) { 849 err = PTR_ERR(ulpi->base.lane); 850 goto out; 851 } 852 853 err = tegra_xusb_ulpi_port_parse_dt(ulpi); 854 if (err < 0) { 855 tegra_xusb_port_unregister(&ulpi->base); 856 goto out; 857 } 858 859 list_add_tail(&ulpi->base.list, &padctl->ports); 860 861 out: 862 of_node_put(np); 863 return err; 864 } 865 866 void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port) 867 { 868 struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port); 869 870 kfree(ulpi); 871 } 872 873 static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic) 874 { 875 /* XXX */ 876 return 0; 877 } 878 879 static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl, 880 unsigned int index) 881 { 882 struct tegra_xusb_hsic_port *hsic; 883 struct device_node *np; 884 int err = 0; 885 886 np = tegra_xusb_find_port_node(padctl, "hsic", index); 887 if (!np || !of_device_is_available(np)) 888 goto out; 889 890 hsic = kzalloc(sizeof(*hsic), GFP_KERNEL); 891 if (!hsic) { 892 err = -ENOMEM; 893 goto out; 894 } 895 896 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index); 897 if (err < 0) 898 goto out; 899 900 hsic->base.ops = padctl->soc->ports.hsic.ops; 901 902 hsic->base.lane = hsic->base.ops->map(&hsic->base); 903 if (IS_ERR(hsic->base.lane)) { 904 err = PTR_ERR(hsic->base.lane); 905 goto out; 906 } 907 908 err = tegra_xusb_hsic_port_parse_dt(hsic); 909 if (err < 0) { 910 tegra_xusb_port_unregister(&hsic->base); 911 goto out; 912 } 913 914 list_add_tail(&hsic->base.list, &padctl->ports); 915 916 out: 917 of_node_put(np); 918 return err; 919 } 920 921 void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port) 922 { 923 struct tegra_xusb_hsic_port *hsic = to_hsic_port(port); 924 925 kfree(hsic); 926 } 927 928 static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3) 929 { 930 struct tegra_xusb_port *port = &usb3->base; 931 struct device_node *np = port->dev.of_node; 932 enum usb_device_speed maximum_speed; 933 u32 value; 934 int err; 935 936 err = of_property_read_u32(np, "nvidia,usb2-companion", &value); 937 if (err < 0) { 938 dev_err(&port->dev, "failed to read port: %d\n", err); 939 return err; 940 } 941 942 usb3->port = value; 943 944 usb3->internal = of_property_read_bool(np, "nvidia,internal"); 945 946 if (device_property_present(&port->dev, "maximum-speed")) { 947 maximum_speed = usb_get_maximum_speed(&port->dev); 948 if (maximum_speed == USB_SPEED_SUPER) 949 usb3->disable_gen2 = true; 950 else if (maximum_speed == USB_SPEED_SUPER_PLUS) 951 usb3->disable_gen2 = false; 952 else 953 return -EINVAL; 954 } 955 956 usb3->supply = regulator_get(&port->dev, "vbus"); 957 return PTR_ERR_OR_ZERO(usb3->supply); 958 } 959 960 static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl, 961 unsigned int index) 962 { 963 struct tegra_xusb_usb3_port *usb3; 964 struct device_node *np; 965 int err = 0; 966 967 /* 968 * If there is no supplemental configuration in the device tree the 969 * port is unusable. But it is valid to configure only a single port, 970 * hence return 0 instead of an error to allow ports to be optional. 971 */ 972 np = tegra_xusb_find_port_node(padctl, "usb3", index); 973 if (!np || !of_device_is_available(np)) 974 goto out; 975 976 usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL); 977 if (!usb3) { 978 err = -ENOMEM; 979 goto out; 980 } 981 982 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index); 983 if (err < 0) 984 goto out; 985 986 usb3->base.ops = padctl->soc->ports.usb3.ops; 987 988 usb3->base.lane = usb3->base.ops->map(&usb3->base); 989 if (IS_ERR(usb3->base.lane)) { 990 err = PTR_ERR(usb3->base.lane); 991 goto out; 992 } 993 994 err = tegra_xusb_usb3_port_parse_dt(usb3); 995 if (err < 0) { 996 tegra_xusb_port_unregister(&usb3->base); 997 goto out; 998 } 999 1000 list_add_tail(&usb3->base.list, &padctl->ports); 1001 1002 out: 1003 of_node_put(np); 1004 return err; 1005 } 1006 1007 void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port) 1008 { 1009 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port); 1010 1011 kfree(usb3); 1012 } 1013 1014 void tegra_xusb_usb3_port_remove(struct tegra_xusb_port *port) 1015 { 1016 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port); 1017 1018 regulator_put(usb3->supply); 1019 } 1020 1021 static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl) 1022 { 1023 struct tegra_xusb_port *port, *tmp; 1024 1025 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) { 1026 list_del(&port->list); 1027 tegra_xusb_port_unregister(port); 1028 } 1029 } 1030 1031 static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl) 1032 { 1033 struct device_node *np; 1034 unsigned int i; 1035 1036 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1037 np = tegra_xusb_find_port_node(padctl, "usb3", i); 1038 if (!np || !of_device_is_available(np)) 1039 return i; 1040 } 1041 1042 return -ENODEV; 1043 } 1044 1045 static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2) 1046 { 1047 unsigned int i; 1048 struct tegra_xusb_usb3_port *usb3; 1049 struct tegra_xusb_padctl *padctl = usb2->base.padctl; 1050 1051 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1052 usb3 = tegra_xusb_find_usb3_port(padctl, i); 1053 if (usb3 && usb3->port == usb2->base.index) 1054 return true; 1055 } 1056 1057 return false; 1058 } 1059 1060 static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2) 1061 { 1062 int fake; 1063 1064 /* Disable usb3_port_fake usage by default and assign if needed */ 1065 usb2->usb3_port_fake = -1; 1066 1067 if ((usb2->mode == USB_DR_MODE_OTG || 1068 usb2->mode == USB_DR_MODE_PERIPHERAL) && 1069 !tegra_xusb_port_is_companion(usb2)) { 1070 fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl); 1071 if (fake < 0) { 1072 dev_err(&usb2->base.dev, "no unused USB3 ports available\n"); 1073 return -ENODEV; 1074 } 1075 1076 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake); 1077 usb2->usb3_port_fake = fake; 1078 } 1079 1080 return 0; 1081 } 1082 1083 static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl) 1084 { 1085 struct tegra_xusb_port *port; 1086 struct tegra_xusb_usb2_port *usb2; 1087 unsigned int i; 1088 int err = 0; 1089 1090 mutex_lock(&padctl->lock); 1091 1092 for (i = 0; i < padctl->soc->ports.usb2.count; i++) { 1093 err = tegra_xusb_add_usb2_port(padctl, i); 1094 if (err < 0) 1095 goto remove_ports; 1096 } 1097 1098 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) { 1099 err = tegra_xusb_add_ulpi_port(padctl, i); 1100 if (err < 0) 1101 goto remove_ports; 1102 } 1103 1104 for (i = 0; i < padctl->soc->ports.hsic.count; i++) { 1105 err = tegra_xusb_add_hsic_port(padctl, i); 1106 if (err < 0) 1107 goto remove_ports; 1108 } 1109 1110 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1111 err = tegra_xusb_add_usb3_port(padctl, i); 1112 if (err < 0) 1113 goto remove_ports; 1114 } 1115 1116 if (padctl->soc->need_fake_usb3_port) { 1117 for (i = 0; i < padctl->soc->ports.usb2.count; i++) { 1118 usb2 = tegra_xusb_find_usb2_port(padctl, i); 1119 if (!usb2) 1120 continue; 1121 1122 err = tegra_xusb_update_usb3_fake_port(usb2); 1123 if (err < 0) 1124 goto remove_ports; 1125 } 1126 } 1127 1128 list_for_each_entry(port, &padctl->ports, list) { 1129 err = port->ops->enable(port); 1130 if (err < 0) 1131 dev_err(padctl->dev, "failed to enable port %s: %d\n", 1132 dev_name(&port->dev), err); 1133 } 1134 1135 goto unlock; 1136 1137 remove_ports: 1138 __tegra_xusb_remove_ports(padctl); 1139 unlock: 1140 mutex_unlock(&padctl->lock); 1141 return err; 1142 } 1143 1144 static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl) 1145 { 1146 mutex_lock(&padctl->lock); 1147 __tegra_xusb_remove_ports(padctl); 1148 mutex_unlock(&padctl->lock); 1149 } 1150 1151 static int tegra_xusb_padctl_probe(struct platform_device *pdev) 1152 { 1153 struct device_node *np = pdev->dev.of_node; 1154 const struct tegra_xusb_padctl_soc *soc; 1155 struct tegra_xusb_padctl *padctl; 1156 const struct of_device_id *match; 1157 int err; 1158 1159 /* for backwards compatibility with old device trees */ 1160 np = of_get_child_by_name(np, "pads"); 1161 if (!np) { 1162 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n"); 1163 return tegra_xusb_padctl_legacy_probe(pdev); 1164 } 1165 1166 of_node_put(np); 1167 1168 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node); 1169 soc = match->data; 1170 1171 padctl = soc->ops->probe(&pdev->dev, soc); 1172 if (IS_ERR(padctl)) 1173 return PTR_ERR(padctl); 1174 1175 platform_set_drvdata(pdev, padctl); 1176 INIT_LIST_HEAD(&padctl->ports); 1177 INIT_LIST_HEAD(&padctl->lanes); 1178 INIT_LIST_HEAD(&padctl->pads); 1179 mutex_init(&padctl->lock); 1180 1181 padctl->regs = devm_platform_ioremap_resource(pdev, 0); 1182 if (IS_ERR(padctl->regs)) { 1183 err = PTR_ERR(padctl->regs); 1184 goto remove; 1185 } 1186 1187 padctl->rst = devm_reset_control_get(&pdev->dev, NULL); 1188 if (IS_ERR(padctl->rst)) { 1189 err = PTR_ERR(padctl->rst); 1190 goto remove; 1191 } 1192 1193 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies, 1194 sizeof(*padctl->supplies), GFP_KERNEL); 1195 if (!padctl->supplies) { 1196 err = -ENOMEM; 1197 goto remove; 1198 } 1199 1200 regulator_bulk_set_supply_names(padctl->supplies, 1201 padctl->soc->supply_names, 1202 padctl->soc->num_supplies); 1203 1204 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies, 1205 padctl->supplies); 1206 if (err < 0) { 1207 dev_err_probe(&pdev->dev, err, "failed to get regulators\n"); 1208 goto remove; 1209 } 1210 1211 err = reset_control_deassert(padctl->rst); 1212 if (err < 0) 1213 goto remove; 1214 1215 err = regulator_bulk_enable(padctl->soc->num_supplies, 1216 padctl->supplies); 1217 if (err < 0) { 1218 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err); 1219 goto reset; 1220 } 1221 1222 err = tegra_xusb_setup_pads(padctl); 1223 if (err < 0) { 1224 dev_err(&pdev->dev, "failed to setup pads: %d\n", err); 1225 goto power_down; 1226 } 1227 1228 err = tegra_xusb_setup_ports(padctl); 1229 if (err) { 1230 const char *level = KERN_ERR; 1231 1232 if (err == -EPROBE_DEFER) 1233 level = KERN_DEBUG; 1234 1235 dev_printk(level, &pdev->dev, 1236 dev_fmt("failed to setup XUSB ports: %d\n"), err); 1237 goto remove_pads; 1238 } 1239 1240 return 0; 1241 1242 remove_pads: 1243 tegra_xusb_remove_pads(padctl); 1244 power_down: 1245 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies); 1246 reset: 1247 reset_control_assert(padctl->rst); 1248 remove: 1249 platform_set_drvdata(pdev, NULL); 1250 soc->ops->remove(padctl); 1251 return err; 1252 } 1253 1254 static int tegra_xusb_padctl_remove(struct platform_device *pdev) 1255 { 1256 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev); 1257 int err; 1258 1259 tegra_xusb_remove_ports(padctl); 1260 tegra_xusb_remove_pads(padctl); 1261 1262 err = regulator_bulk_disable(padctl->soc->num_supplies, 1263 padctl->supplies); 1264 if (err < 0) 1265 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err); 1266 1267 err = reset_control_assert(padctl->rst); 1268 if (err < 0) 1269 dev_err(&pdev->dev, "failed to assert reset: %d\n", err); 1270 1271 padctl->soc->ops->remove(padctl); 1272 1273 return err; 1274 } 1275 1276 static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev) 1277 { 1278 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); 1279 1280 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq) 1281 return padctl->soc->ops->suspend_noirq(padctl); 1282 1283 return 0; 1284 } 1285 1286 static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev) 1287 { 1288 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); 1289 1290 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq) 1291 return padctl->soc->ops->resume_noirq(padctl); 1292 1293 return 0; 1294 } 1295 1296 static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = { 1297 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq, 1298 tegra_xusb_padctl_resume_noirq) 1299 }; 1300 1301 static struct platform_driver tegra_xusb_padctl_driver = { 1302 .driver = { 1303 .name = "tegra-xusb-padctl", 1304 .of_match_table = tegra_xusb_padctl_of_match, 1305 .pm = &tegra_xusb_padctl_pm_ops, 1306 }, 1307 .probe = tegra_xusb_padctl_probe, 1308 .remove = tegra_xusb_padctl_remove, 1309 }; 1310 module_platform_driver(tegra_xusb_padctl_driver); 1311 1312 struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev) 1313 { 1314 struct tegra_xusb_padctl *padctl; 1315 struct platform_device *pdev; 1316 struct device_node *np; 1317 1318 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0); 1319 if (!np) 1320 return ERR_PTR(-EINVAL); 1321 1322 /* 1323 * This is slightly ugly. A better implementation would be to keep a 1324 * registry of pad controllers, but since there will almost certainly 1325 * only ever be one per SoC that would be a little overkill. 1326 */ 1327 pdev = of_find_device_by_node(np); 1328 if (!pdev) { 1329 of_node_put(np); 1330 return ERR_PTR(-ENODEV); 1331 } 1332 1333 of_node_put(np); 1334 1335 padctl = platform_get_drvdata(pdev); 1336 if (!padctl) { 1337 put_device(&pdev->dev); 1338 return ERR_PTR(-EPROBE_DEFER); 1339 } 1340 1341 return padctl; 1342 } 1343 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get); 1344 1345 void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl) 1346 { 1347 if (padctl) 1348 put_device(padctl->dev); 1349 } 1350 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put); 1351 1352 int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl, 1353 unsigned int port) 1354 { 1355 if (padctl->soc->ops->usb3_save_context) 1356 return padctl->soc->ops->usb3_save_context(padctl, port); 1357 1358 return -ENOSYS; 1359 } 1360 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context); 1361 1362 int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl, 1363 unsigned int port, bool idle) 1364 { 1365 if (padctl->soc->ops->hsic_set_idle) 1366 return padctl->soc->ops->hsic_set_idle(padctl, port, idle); 1367 1368 return -ENOSYS; 1369 } 1370 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle); 1371 1372 int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy, 1373 enum usb_device_speed speed) 1374 { 1375 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1376 1377 if (lane->pad->ops->enable_phy_sleepwalk) 1378 return lane->pad->ops->enable_phy_sleepwalk(lane, speed); 1379 1380 return -EOPNOTSUPP; 1381 } 1382 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk); 1383 1384 int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy) 1385 { 1386 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1387 1388 if (lane->pad->ops->disable_phy_sleepwalk) 1389 return lane->pad->ops->disable_phy_sleepwalk(lane); 1390 1391 return -EOPNOTSUPP; 1392 } 1393 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk); 1394 1395 int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy) 1396 { 1397 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1398 1399 if (lane->pad->ops->enable_phy_wake) 1400 return lane->pad->ops->enable_phy_wake(lane); 1401 1402 return -EOPNOTSUPP; 1403 } 1404 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake); 1405 1406 int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy) 1407 { 1408 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1409 1410 if (lane->pad->ops->disable_phy_wake) 1411 return lane->pad->ops->disable_phy_wake(lane); 1412 1413 return -EOPNOTSUPP; 1414 } 1415 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake); 1416 1417 bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy) 1418 { 1419 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1420 1421 if (lane->pad->ops->remote_wake_detected) 1422 return lane->pad->ops->remote_wake_detected(lane); 1423 1424 return false; 1425 } 1426 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected); 1427 1428 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl, 1429 unsigned int port, bool enable) 1430 { 1431 if (padctl->soc->ops->usb3_set_lfps_detect) 1432 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port, 1433 enable); 1434 1435 return -ENOSYS; 1436 } 1437 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect); 1438 1439 int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl, 1440 bool val) 1441 { 1442 if (padctl->soc->ops->vbus_override) 1443 return padctl->soc->ops->vbus_override(padctl, val); 1444 1445 return -ENOTSUPP; 1446 } 1447 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override); 1448 1449 int tegra_phy_xusb_utmi_port_reset(struct phy *phy) 1450 { 1451 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1452 struct tegra_xusb_padctl *padctl = lane->pad->padctl; 1453 1454 if (padctl->soc->ops->utmi_port_reset) 1455 return padctl->soc->ops->utmi_port_reset(phy); 1456 1457 return -ENOTSUPP; 1458 } 1459 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset); 1460 1461 int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl, 1462 unsigned int port) 1463 { 1464 struct tegra_xusb_usb2_port *usb2; 1465 struct tegra_xusb_usb3_port *usb3; 1466 int i; 1467 1468 usb2 = tegra_xusb_find_usb2_port(padctl, port); 1469 if (!usb2) 1470 return -EINVAL; 1471 1472 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1473 usb3 = tegra_xusb_find_usb3_port(padctl, i); 1474 if (usb3 && usb3->port == usb2->base.index) 1475 return usb3->base.index; 1476 } 1477 1478 return -ENODEV; 1479 } 1480 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion); 1481 1482 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); 1483 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver"); 1484 MODULE_LICENSE("GPL v2"); 1485