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_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 #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 } 572 573 if (port->ops->remove) 574 port->ops->remove(port); 575 576 device_unregister(&port->dev); 577 } 578 579 static const char *const modes[] = { 580 [USB_DR_MODE_UNKNOWN] = "", 581 [USB_DR_MODE_HOST] = "host", 582 [USB_DR_MODE_PERIPHERAL] = "peripheral", 583 [USB_DR_MODE_OTG] = "otg", 584 }; 585 586 static const char * const usb_roles[] = { 587 [USB_ROLE_NONE] = "none", 588 [USB_ROLE_HOST] = "host", 589 [USB_ROLE_DEVICE] = "device", 590 }; 591 592 static enum usb_phy_events to_usb_phy_event(enum usb_role role) 593 { 594 switch (role) { 595 case USB_ROLE_DEVICE: 596 return USB_EVENT_VBUS; 597 598 case USB_ROLE_HOST: 599 return USB_EVENT_ID; 600 601 default: 602 return USB_EVENT_NONE; 603 } 604 } 605 606 static void tegra_xusb_usb_phy_work(struct work_struct *work) 607 { 608 struct tegra_xusb_port *port = container_of(work, 609 struct tegra_xusb_port, 610 usb_phy_work); 611 enum usb_role role = usb_role_switch_get_role(port->usb_role_sw); 612 613 usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role)); 614 615 dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__, 616 usb_roles[role]); 617 618 atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy); 619 } 620 621 static int tegra_xusb_role_sw_set(struct usb_role_switch *sw, 622 enum usb_role role) 623 { 624 struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw); 625 626 dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]); 627 628 schedule_work(&port->usb_phy_work); 629 630 return 0; 631 } 632 633 static int tegra_xusb_set_peripheral(struct usb_otg *otg, 634 struct usb_gadget *gadget) 635 { 636 struct tegra_xusb_port *port = container_of(otg->usb_phy, 637 struct tegra_xusb_port, 638 usb_phy); 639 640 if (gadget != NULL) 641 schedule_work(&port->usb_phy_work); 642 643 return 0; 644 } 645 646 static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host) 647 { 648 struct tegra_xusb_port *port = container_of(otg->usb_phy, 649 struct tegra_xusb_port, 650 usb_phy); 651 652 if (host != NULL) 653 schedule_work(&port->usb_phy_work); 654 655 return 0; 656 } 657 658 659 static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port) 660 { 661 struct tegra_xusb_lane *lane; 662 struct usb_role_switch_desc role_sx_desc = { 663 .fwnode = dev_fwnode(&port->dev), 664 .set = tegra_xusb_role_sw_set, 665 .allow_userspace_control = true, 666 }; 667 int err = 0; 668 669 /* 670 * USB role switch driver needs parent driver owner info. This is a 671 * suboptimal solution. TODO: Need to revisit this in a follow-up patch 672 * where an optimal solution is possible with changes to USB role 673 * switch driver. 674 */ 675 port->dev.driver = devm_kzalloc(&port->dev, 676 sizeof(struct device_driver), 677 GFP_KERNEL); 678 port->dev.driver->owner = THIS_MODULE; 679 680 port->usb_role_sw = usb_role_switch_register(&port->dev, 681 &role_sx_desc); 682 if (IS_ERR(port->usb_role_sw)) { 683 err = PTR_ERR(port->usb_role_sw); 684 dev_err(&port->dev, "failed to register USB role switch: %d", 685 err); 686 return err; 687 } 688 689 INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work); 690 usb_role_switch_set_drvdata(port->usb_role_sw, port); 691 692 port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg), 693 GFP_KERNEL); 694 if (!port->usb_phy.otg) 695 return -ENOMEM; 696 697 lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index); 698 699 /* 700 * Assign phy dev to usb-phy dev. Host/device drivers can use phy 701 * reference to retrieve usb-phy details. 702 */ 703 port->usb_phy.dev = &lane->pad->lanes[port->index]->dev; 704 port->usb_phy.dev->driver = port->dev.driver; 705 port->usb_phy.otg->usb_phy = &port->usb_phy; 706 port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral; 707 port->usb_phy.otg->set_host = tegra_xusb_set_host; 708 709 err = usb_add_phy_dev(&port->usb_phy); 710 if (err < 0) { 711 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err); 712 return err; 713 } 714 715 /* populate connector entry */ 716 of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev); 717 718 return err; 719 } 720 721 static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2) 722 { 723 struct tegra_xusb_port *port = &usb2->base; 724 struct device_node *np = port->dev.of_node; 725 const char *mode; 726 int err; 727 728 usb2->internal = of_property_read_bool(np, "nvidia,internal"); 729 730 if (!of_property_read_string(np, "mode", &mode)) { 731 int err = match_string(modes, ARRAY_SIZE(modes), mode); 732 if (err < 0) { 733 dev_err(&port->dev, "invalid value %s for \"mode\"\n", 734 mode); 735 usb2->mode = USB_DR_MODE_UNKNOWN; 736 } else { 737 usb2->mode = err; 738 } 739 } else { 740 usb2->mode = USB_DR_MODE_HOST; 741 } 742 743 /* usb-role-switch property is mandatory for OTG/Peripheral modes */ 744 if (usb2->mode == USB_DR_MODE_PERIPHERAL || 745 usb2->mode == USB_DR_MODE_OTG) { 746 if (of_property_read_bool(np, "usb-role-switch")) { 747 err = tegra_xusb_setup_usb_role_switch(port); 748 if (err < 0) 749 return err; 750 } else { 751 dev_err(&port->dev, "usb-role-switch not found for %s mode", 752 modes[usb2->mode]); 753 return -EINVAL; 754 } 755 } 756 757 usb2->supply = regulator_get(&port->dev, "vbus"); 758 return PTR_ERR_OR_ZERO(usb2->supply); 759 } 760 761 static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl, 762 unsigned int index) 763 { 764 struct tegra_xusb_usb2_port *usb2; 765 struct device_node *np; 766 int err = 0; 767 768 /* 769 * USB2 ports don't require additional properties, but if the port is 770 * marked as disabled there is no reason to register it. 771 */ 772 np = tegra_xusb_find_port_node(padctl, "usb2", index); 773 if (!np || !of_device_is_available(np)) 774 goto out; 775 776 usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL); 777 if (!usb2) { 778 err = -ENOMEM; 779 goto out; 780 } 781 782 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index); 783 if (err < 0) 784 goto out; 785 786 usb2->base.ops = padctl->soc->ports.usb2.ops; 787 788 usb2->base.lane = usb2->base.ops->map(&usb2->base); 789 if (IS_ERR(usb2->base.lane)) { 790 err = PTR_ERR(usb2->base.lane); 791 goto out; 792 } 793 794 err = tegra_xusb_usb2_port_parse_dt(usb2); 795 if (err < 0) { 796 tegra_xusb_port_unregister(&usb2->base); 797 goto out; 798 } 799 800 list_add_tail(&usb2->base.list, &padctl->ports); 801 802 out: 803 of_node_put(np); 804 return err; 805 } 806 807 void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port) 808 { 809 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); 810 811 kfree(usb2); 812 } 813 814 void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port) 815 { 816 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); 817 818 regulator_put(usb2->supply); 819 } 820 821 static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi) 822 { 823 struct tegra_xusb_port *port = &ulpi->base; 824 struct device_node *np = port->dev.of_node; 825 826 ulpi->internal = of_property_read_bool(np, "nvidia,internal"); 827 828 return 0; 829 } 830 831 static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl, 832 unsigned int index) 833 { 834 struct tegra_xusb_ulpi_port *ulpi; 835 struct device_node *np; 836 int err = 0; 837 838 np = tegra_xusb_find_port_node(padctl, "ulpi", index); 839 if (!np || !of_device_is_available(np)) 840 goto out; 841 842 ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL); 843 if (!ulpi) { 844 err = -ENOMEM; 845 goto out; 846 } 847 848 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index); 849 if (err < 0) 850 goto out; 851 852 ulpi->base.ops = padctl->soc->ports.ulpi.ops; 853 854 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base); 855 if (IS_ERR(ulpi->base.lane)) { 856 err = PTR_ERR(ulpi->base.lane); 857 goto out; 858 } 859 860 err = tegra_xusb_ulpi_port_parse_dt(ulpi); 861 if (err < 0) { 862 tegra_xusb_port_unregister(&ulpi->base); 863 goto out; 864 } 865 866 list_add_tail(&ulpi->base.list, &padctl->ports); 867 868 out: 869 of_node_put(np); 870 return err; 871 } 872 873 void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port) 874 { 875 struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port); 876 877 kfree(ulpi); 878 } 879 880 static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic) 881 { 882 /* XXX */ 883 return 0; 884 } 885 886 static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl, 887 unsigned int index) 888 { 889 struct tegra_xusb_hsic_port *hsic; 890 struct device_node *np; 891 int err = 0; 892 893 np = tegra_xusb_find_port_node(padctl, "hsic", index); 894 if (!np || !of_device_is_available(np)) 895 goto out; 896 897 hsic = kzalloc(sizeof(*hsic), GFP_KERNEL); 898 if (!hsic) { 899 err = -ENOMEM; 900 goto out; 901 } 902 903 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index); 904 if (err < 0) 905 goto out; 906 907 hsic->base.ops = padctl->soc->ports.hsic.ops; 908 909 hsic->base.lane = hsic->base.ops->map(&hsic->base); 910 if (IS_ERR(hsic->base.lane)) { 911 err = PTR_ERR(hsic->base.lane); 912 goto out; 913 } 914 915 err = tegra_xusb_hsic_port_parse_dt(hsic); 916 if (err < 0) { 917 tegra_xusb_port_unregister(&hsic->base); 918 goto out; 919 } 920 921 list_add_tail(&hsic->base.list, &padctl->ports); 922 923 out: 924 of_node_put(np); 925 return err; 926 } 927 928 void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port) 929 { 930 struct tegra_xusb_hsic_port *hsic = to_hsic_port(port); 931 932 kfree(hsic); 933 } 934 935 static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3) 936 { 937 struct tegra_xusb_port *port = &usb3->base; 938 struct device_node *np = port->dev.of_node; 939 enum usb_device_speed maximum_speed; 940 u32 value; 941 int err; 942 943 err = of_property_read_u32(np, "nvidia,usb2-companion", &value); 944 if (err < 0) { 945 dev_err(&port->dev, "failed to read port: %d\n", err); 946 return err; 947 } 948 949 usb3->port = value; 950 951 usb3->internal = of_property_read_bool(np, "nvidia,internal"); 952 953 if (device_property_present(&port->dev, "maximum-speed")) { 954 maximum_speed = usb_get_maximum_speed(&port->dev); 955 if (maximum_speed == USB_SPEED_SUPER) 956 usb3->disable_gen2 = true; 957 else if (maximum_speed == USB_SPEED_SUPER_PLUS) 958 usb3->disable_gen2 = false; 959 else 960 return -EINVAL; 961 } 962 963 return 0; 964 } 965 966 static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl, 967 unsigned int index) 968 { 969 struct tegra_xusb_usb3_port *usb3; 970 struct device_node *np; 971 int err = 0; 972 973 /* 974 * If there is no supplemental configuration in the device tree the 975 * port is unusable. But it is valid to configure only a single port, 976 * hence return 0 instead of an error to allow ports to be optional. 977 */ 978 np = tegra_xusb_find_port_node(padctl, "usb3", index); 979 if (!np || !of_device_is_available(np)) 980 goto out; 981 982 usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL); 983 if (!usb3) { 984 err = -ENOMEM; 985 goto out; 986 } 987 988 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index); 989 if (err < 0) 990 goto out; 991 992 usb3->base.ops = padctl->soc->ports.usb3.ops; 993 994 usb3->base.lane = usb3->base.ops->map(&usb3->base); 995 if (IS_ERR(usb3->base.lane)) { 996 err = PTR_ERR(usb3->base.lane); 997 goto out; 998 } 999 1000 err = tegra_xusb_usb3_port_parse_dt(usb3); 1001 if (err < 0) { 1002 tegra_xusb_port_unregister(&usb3->base); 1003 goto out; 1004 } 1005 1006 list_add_tail(&usb3->base.list, &padctl->ports); 1007 1008 out: 1009 of_node_put(np); 1010 return err; 1011 } 1012 1013 void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port) 1014 { 1015 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port); 1016 1017 kfree(usb3); 1018 } 1019 1020 static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl) 1021 { 1022 struct tegra_xusb_port *port, *tmp; 1023 1024 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) { 1025 list_del(&port->list); 1026 tegra_xusb_port_unregister(port); 1027 } 1028 } 1029 1030 static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl) 1031 { 1032 struct device_node *np; 1033 unsigned int i; 1034 1035 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1036 np = tegra_xusb_find_port_node(padctl, "usb3", i); 1037 if (!np || !of_device_is_available(np)) 1038 return i; 1039 } 1040 1041 return -ENODEV; 1042 } 1043 1044 static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2) 1045 { 1046 unsigned int i; 1047 struct tegra_xusb_usb3_port *usb3; 1048 struct tegra_xusb_padctl *padctl = usb2->base.padctl; 1049 1050 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1051 usb3 = tegra_xusb_find_usb3_port(padctl, i); 1052 if (usb3 && usb3->port == usb2->base.index) 1053 return true; 1054 } 1055 1056 return false; 1057 } 1058 1059 static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2) 1060 { 1061 int fake; 1062 1063 /* Disable usb3_port_fake usage by default and assign if needed */ 1064 usb2->usb3_port_fake = -1; 1065 1066 if ((usb2->mode == USB_DR_MODE_OTG || 1067 usb2->mode == USB_DR_MODE_PERIPHERAL) && 1068 !tegra_xusb_port_is_companion(usb2)) { 1069 fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl); 1070 if (fake < 0) { 1071 dev_err(&usb2->base.dev, "no unused USB3 ports available\n"); 1072 return -ENODEV; 1073 } 1074 1075 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake); 1076 usb2->usb3_port_fake = fake; 1077 } 1078 1079 return 0; 1080 } 1081 1082 static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl) 1083 { 1084 struct tegra_xusb_port *port; 1085 struct tegra_xusb_usb2_port *usb2; 1086 unsigned int i; 1087 int err = 0; 1088 1089 mutex_lock(&padctl->lock); 1090 1091 for (i = 0; i < padctl->soc->ports.usb2.count; i++) { 1092 err = tegra_xusb_add_usb2_port(padctl, i); 1093 if (err < 0) 1094 goto remove_ports; 1095 } 1096 1097 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) { 1098 err = tegra_xusb_add_ulpi_port(padctl, i); 1099 if (err < 0) 1100 goto remove_ports; 1101 } 1102 1103 for (i = 0; i < padctl->soc->ports.hsic.count; i++) { 1104 err = tegra_xusb_add_hsic_port(padctl, i); 1105 if (err < 0) 1106 goto remove_ports; 1107 } 1108 1109 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1110 err = tegra_xusb_add_usb3_port(padctl, i); 1111 if (err < 0) 1112 goto remove_ports; 1113 } 1114 1115 if (padctl->soc->need_fake_usb3_port) { 1116 for (i = 0; i < padctl->soc->ports.usb2.count; i++) { 1117 usb2 = tegra_xusb_find_usb2_port(padctl, i); 1118 if (!usb2) 1119 continue; 1120 1121 err = tegra_xusb_update_usb3_fake_port(usb2); 1122 if (err < 0) 1123 goto remove_ports; 1124 } 1125 } 1126 1127 list_for_each_entry(port, &padctl->ports, list) { 1128 err = port->ops->enable(port); 1129 if (err < 0) 1130 dev_err(padctl->dev, "failed to enable port %s: %d\n", 1131 dev_name(&port->dev), err); 1132 } 1133 1134 goto unlock; 1135 1136 remove_ports: 1137 __tegra_xusb_remove_ports(padctl); 1138 unlock: 1139 mutex_unlock(&padctl->lock); 1140 return err; 1141 } 1142 1143 static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl) 1144 { 1145 mutex_lock(&padctl->lock); 1146 __tegra_xusb_remove_ports(padctl); 1147 mutex_unlock(&padctl->lock); 1148 } 1149 1150 static int tegra_xusb_padctl_probe(struct platform_device *pdev) 1151 { 1152 struct device_node *np = pdev->dev.of_node; 1153 const struct tegra_xusb_padctl_soc *soc; 1154 struct tegra_xusb_padctl *padctl; 1155 const struct of_device_id *match; 1156 int err; 1157 1158 /* for backwards compatibility with old device trees */ 1159 np = of_get_child_by_name(np, "pads"); 1160 if (!np) { 1161 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n"); 1162 return tegra_xusb_padctl_legacy_probe(pdev); 1163 } 1164 1165 of_node_put(np); 1166 1167 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node); 1168 soc = match->data; 1169 1170 padctl = soc->ops->probe(&pdev->dev, soc); 1171 if (IS_ERR(padctl)) 1172 return PTR_ERR(padctl); 1173 1174 platform_set_drvdata(pdev, padctl); 1175 INIT_LIST_HEAD(&padctl->ports); 1176 INIT_LIST_HEAD(&padctl->lanes); 1177 INIT_LIST_HEAD(&padctl->pads); 1178 mutex_init(&padctl->lock); 1179 1180 padctl->regs = devm_platform_ioremap_resource(pdev, 0); 1181 if (IS_ERR(padctl->regs)) { 1182 err = PTR_ERR(padctl->regs); 1183 goto remove; 1184 } 1185 1186 padctl->rst = devm_reset_control_get(&pdev->dev, NULL); 1187 if (IS_ERR(padctl->rst)) { 1188 err = PTR_ERR(padctl->rst); 1189 goto remove; 1190 } 1191 1192 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies, 1193 sizeof(*padctl->supplies), GFP_KERNEL); 1194 if (!padctl->supplies) { 1195 err = -ENOMEM; 1196 goto remove; 1197 } 1198 1199 regulator_bulk_set_supply_names(padctl->supplies, 1200 padctl->soc->supply_names, 1201 padctl->soc->num_supplies); 1202 1203 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies, 1204 padctl->supplies); 1205 if (err < 0) { 1206 dev_err_probe(&pdev->dev, err, "failed to get regulators\n"); 1207 goto remove; 1208 } 1209 1210 err = reset_control_deassert(padctl->rst); 1211 if (err < 0) 1212 goto remove; 1213 1214 err = regulator_bulk_enable(padctl->soc->num_supplies, 1215 padctl->supplies); 1216 if (err < 0) { 1217 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err); 1218 goto reset; 1219 } 1220 1221 err = tegra_xusb_setup_pads(padctl); 1222 if (err < 0) { 1223 dev_err(&pdev->dev, "failed to setup pads: %d\n", err); 1224 goto power_down; 1225 } 1226 1227 err = tegra_xusb_setup_ports(padctl); 1228 if (err) { 1229 const char *level = KERN_ERR; 1230 1231 if (err == -EPROBE_DEFER) 1232 level = KERN_DEBUG; 1233 1234 dev_printk(level, &pdev->dev, 1235 dev_fmt("failed to setup XUSB ports: %d\n"), err); 1236 goto remove_pads; 1237 } 1238 1239 return 0; 1240 1241 remove_pads: 1242 tegra_xusb_remove_pads(padctl); 1243 power_down: 1244 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies); 1245 reset: 1246 reset_control_assert(padctl->rst); 1247 remove: 1248 platform_set_drvdata(pdev, NULL); 1249 soc->ops->remove(padctl); 1250 return err; 1251 } 1252 1253 static int tegra_xusb_padctl_remove(struct platform_device *pdev) 1254 { 1255 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev); 1256 int err; 1257 1258 tegra_xusb_remove_ports(padctl); 1259 tegra_xusb_remove_pads(padctl); 1260 1261 err = regulator_bulk_disable(padctl->soc->num_supplies, 1262 padctl->supplies); 1263 if (err < 0) 1264 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err); 1265 1266 err = reset_control_assert(padctl->rst); 1267 if (err < 0) 1268 dev_err(&pdev->dev, "failed to assert reset: %d\n", err); 1269 1270 padctl->soc->ops->remove(padctl); 1271 1272 return 0; 1273 } 1274 1275 static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev) 1276 { 1277 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); 1278 1279 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq) 1280 return padctl->soc->ops->suspend_noirq(padctl); 1281 1282 return 0; 1283 } 1284 1285 static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev) 1286 { 1287 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); 1288 1289 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq) 1290 return padctl->soc->ops->resume_noirq(padctl); 1291 1292 return 0; 1293 } 1294 1295 static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = { 1296 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq, 1297 tegra_xusb_padctl_resume_noirq) 1298 }; 1299 1300 static struct platform_driver tegra_xusb_padctl_driver = { 1301 .driver = { 1302 .name = "tegra-xusb-padctl", 1303 .of_match_table = tegra_xusb_padctl_of_match, 1304 .pm = &tegra_xusb_padctl_pm_ops, 1305 }, 1306 .probe = tegra_xusb_padctl_probe, 1307 .remove = tegra_xusb_padctl_remove, 1308 }; 1309 module_platform_driver(tegra_xusb_padctl_driver); 1310 1311 struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev) 1312 { 1313 struct tegra_xusb_padctl *padctl; 1314 struct platform_device *pdev; 1315 struct device_node *np; 1316 1317 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0); 1318 if (!np) 1319 return ERR_PTR(-EINVAL); 1320 1321 /* 1322 * This is slightly ugly. A better implementation would be to keep a 1323 * registry of pad controllers, but since there will almost certainly 1324 * only ever be one per SoC that would be a little overkill. 1325 */ 1326 pdev = of_find_device_by_node(np); 1327 if (!pdev) { 1328 of_node_put(np); 1329 return ERR_PTR(-ENODEV); 1330 } 1331 1332 of_node_put(np); 1333 1334 padctl = platform_get_drvdata(pdev); 1335 if (!padctl) { 1336 put_device(&pdev->dev); 1337 return ERR_PTR(-EPROBE_DEFER); 1338 } 1339 1340 return padctl; 1341 } 1342 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get); 1343 1344 void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl) 1345 { 1346 if (padctl) 1347 put_device(padctl->dev); 1348 } 1349 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put); 1350 1351 int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl, 1352 unsigned int port) 1353 { 1354 if (padctl->soc->ops->usb3_save_context) 1355 return padctl->soc->ops->usb3_save_context(padctl, port); 1356 1357 return -ENOSYS; 1358 } 1359 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context); 1360 1361 int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl, 1362 unsigned int port, bool idle) 1363 { 1364 if (padctl->soc->ops->hsic_set_idle) 1365 return padctl->soc->ops->hsic_set_idle(padctl, port, idle); 1366 1367 return -ENOSYS; 1368 } 1369 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle); 1370 1371 int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy, 1372 enum usb_device_speed speed) 1373 { 1374 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1375 1376 if (lane->pad->ops->enable_phy_sleepwalk) 1377 return lane->pad->ops->enable_phy_sleepwalk(lane, speed); 1378 1379 return -EOPNOTSUPP; 1380 } 1381 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk); 1382 1383 int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy) 1384 { 1385 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1386 1387 if (lane->pad->ops->disable_phy_sleepwalk) 1388 return lane->pad->ops->disable_phy_sleepwalk(lane); 1389 1390 return -EOPNOTSUPP; 1391 } 1392 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk); 1393 1394 int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy) 1395 { 1396 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1397 1398 if (lane->pad->ops->enable_phy_wake) 1399 return lane->pad->ops->enable_phy_wake(lane); 1400 1401 return -EOPNOTSUPP; 1402 } 1403 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake); 1404 1405 int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy) 1406 { 1407 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1408 1409 if (lane->pad->ops->disable_phy_wake) 1410 return lane->pad->ops->disable_phy_wake(lane); 1411 1412 return -EOPNOTSUPP; 1413 } 1414 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake); 1415 1416 bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy) 1417 { 1418 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1419 1420 if (lane->pad->ops->remote_wake_detected) 1421 return lane->pad->ops->remote_wake_detected(lane); 1422 1423 return false; 1424 } 1425 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected); 1426 1427 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl, 1428 unsigned int port, bool enable) 1429 { 1430 if (padctl->soc->ops->usb3_set_lfps_detect) 1431 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port, 1432 enable); 1433 1434 return -ENOSYS; 1435 } 1436 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect); 1437 1438 int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl, 1439 bool val) 1440 { 1441 if (padctl->soc->ops->vbus_override) 1442 return padctl->soc->ops->vbus_override(padctl, val); 1443 1444 return -ENOTSUPP; 1445 } 1446 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override); 1447 1448 int tegra_phy_xusb_utmi_port_reset(struct phy *phy) 1449 { 1450 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1451 struct tegra_xusb_padctl *padctl = lane->pad->padctl; 1452 1453 if (padctl->soc->ops->utmi_port_reset) 1454 return padctl->soc->ops->utmi_port_reset(phy); 1455 1456 return -ENOTSUPP; 1457 } 1458 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset); 1459 1460 void tegra_phy_xusb_utmi_pad_power_on(struct phy *phy) 1461 { 1462 struct tegra_xusb_lane *lane; 1463 struct tegra_xusb_padctl *padctl; 1464 1465 if (!phy) 1466 return; 1467 1468 lane = phy_get_drvdata(phy); 1469 padctl = lane->pad->padctl; 1470 1471 if (padctl->soc->ops->utmi_pad_power_on) 1472 padctl->soc->ops->utmi_pad_power_on(phy); 1473 } 1474 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_on); 1475 1476 void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy) 1477 { 1478 struct tegra_xusb_lane *lane; 1479 struct tegra_xusb_padctl *padctl; 1480 1481 if (!phy) 1482 return; 1483 1484 lane = phy_get_drvdata(phy); 1485 padctl = lane->pad->padctl; 1486 1487 if (padctl->soc->ops->utmi_pad_power_down) 1488 padctl->soc->ops->utmi_pad_power_down(phy); 1489 } 1490 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_down); 1491 1492 int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl, 1493 unsigned int port) 1494 { 1495 struct tegra_xusb_usb2_port *usb2; 1496 struct tegra_xusb_usb3_port *usb3; 1497 int i; 1498 1499 usb2 = tegra_xusb_find_usb2_port(padctl, port); 1500 if (!usb2) 1501 return -EINVAL; 1502 1503 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1504 usb3 = tegra_xusb_find_usb3_port(padctl, i); 1505 if (usb3 && usb3->port == usb2->base.index) 1506 return usb3->base.index; 1507 } 1508 1509 return -ENODEV; 1510 } 1511 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion); 1512 1513 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); 1514 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver"); 1515 MODULE_LICENSE("GPL v2"); 1516