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 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 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); 1535 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver"); 1536 MODULE_LICENSE("GPL v2"); 1537