1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014-2022, NVIDIA CORPORATION. All rights reserved. 4 */ 5 6 #include <linux/delay.h> 7 #include <linux/io.h> 8 #include <linux/mailbox_client.h> 9 #include <linux/module.h> 10 #include <linux/of.h> 11 #include <linux/of_platform.h> 12 #include <linux/phy/phy.h> 13 #include <linux/phy/tegra/xusb.h> 14 #include <linux/platform_device.h> 15 #include <linux/regulator/consumer.h> 16 #include <linux/reset.h> 17 #include <linux/slab.h> 18 #include <linux/workqueue.h> 19 20 #include <soc/tegra/fuse.h> 21 22 #include "xusb.h" 23 24 static struct phy *tegra_xusb_pad_of_xlate(struct device *dev, 25 const struct of_phandle_args *args) 26 { 27 struct tegra_xusb_pad *pad = dev_get_drvdata(dev); 28 struct phy *phy = NULL; 29 unsigned int i; 30 31 if (args->args_count != 0) 32 return ERR_PTR(-EINVAL); 33 34 for (i = 0; i < pad->soc->num_lanes; i++) { 35 if (!pad->lanes[i]) 36 continue; 37 38 if (pad->lanes[i]->dev.of_node == args->np) { 39 phy = pad->lanes[i]; 40 break; 41 } 42 } 43 44 if (phy == NULL) 45 phy = ERR_PTR(-ENODEV); 46 47 return phy; 48 } 49 50 static const struct of_device_id tegra_xusb_padctl_of_match[] = { 51 #if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC) 52 { 53 .compatible = "nvidia,tegra124-xusb-padctl", 54 .data = &tegra124_xusb_padctl_soc, 55 }, 56 #endif 57 #if defined(CONFIG_ARCH_TEGRA_210_SOC) 58 { 59 .compatible = "nvidia,tegra210-xusb-padctl", 60 .data = &tegra210_xusb_padctl_soc, 61 }, 62 #endif 63 #if defined(CONFIG_ARCH_TEGRA_186_SOC) 64 { 65 .compatible = "nvidia,tegra186-xusb-padctl", 66 .data = &tegra186_xusb_padctl_soc, 67 }, 68 #endif 69 #if defined(CONFIG_ARCH_TEGRA_194_SOC) 70 { 71 .compatible = "nvidia,tegra194-xusb-padctl", 72 .data = &tegra194_xusb_padctl_soc, 73 }, 74 #endif 75 #if defined(CONFIG_ARCH_TEGRA_234_SOC) 76 { 77 .compatible = "nvidia,tegra234-xusb-padctl", 78 .data = &tegra234_xusb_padctl_soc, 79 }, 80 #endif 81 { } 82 }; 83 MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match); 84 85 static struct device_node * 86 tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name) 87 { 88 struct device_node *pads, *np; 89 90 pads = of_get_child_by_name(padctl->dev->of_node, "pads"); 91 if (!pads) 92 return NULL; 93 94 np = of_get_child_by_name(pads, name); 95 of_node_put(pads); 96 97 return np; 98 } 99 100 static struct device_node * 101 tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index) 102 { 103 struct device_node *np, *lanes; 104 105 lanes = of_get_child_by_name(pad->dev.of_node, "lanes"); 106 if (!lanes) 107 return NULL; 108 109 np = of_get_child_by_name(lanes, pad->soc->lanes[index].name); 110 of_node_put(lanes); 111 112 return np; 113 } 114 115 int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane, 116 struct device_node *np) 117 { 118 struct device *dev = &lane->pad->dev; 119 const char *function; 120 int err; 121 122 err = of_property_read_string(np, "nvidia,function", &function); 123 if (err < 0) 124 return err; 125 126 err = match_string(lane->soc->funcs, lane->soc->num_funcs, function); 127 if (err < 0) { 128 dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n", 129 function, np); 130 return err; 131 } 132 133 lane->function = err; 134 135 return 0; 136 } 137 138 static void tegra_xusb_lane_destroy(struct phy *phy) 139 { 140 if (phy) { 141 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 142 143 lane->pad->ops->remove(lane); 144 phy_destroy(phy); 145 } 146 } 147 148 static void tegra_xusb_pad_release(struct device *dev) 149 { 150 struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev); 151 152 pad->soc->ops->remove(pad); 153 } 154 155 static const struct device_type tegra_xusb_pad_type = { 156 .release = tegra_xusb_pad_release, 157 }; 158 159 int tegra_xusb_pad_init(struct tegra_xusb_pad *pad, 160 struct tegra_xusb_padctl *padctl, 161 struct device_node *np) 162 { 163 int err; 164 165 device_initialize(&pad->dev); 166 INIT_LIST_HEAD(&pad->list); 167 pad->dev.parent = padctl->dev; 168 pad->dev.type = &tegra_xusb_pad_type; 169 pad->dev.of_node = np; 170 pad->padctl = padctl; 171 172 err = dev_set_name(&pad->dev, "%s", pad->soc->name); 173 if (err < 0) 174 goto unregister; 175 176 err = device_add(&pad->dev); 177 if (err < 0) 178 goto unregister; 179 180 return 0; 181 182 unregister: 183 device_unregister(&pad->dev); 184 return err; 185 } 186 187 int tegra_xusb_pad_register(struct tegra_xusb_pad *pad, 188 const struct phy_ops *ops) 189 { 190 struct device_node *children; 191 struct phy *lane; 192 unsigned int i; 193 int err; 194 195 children = of_get_child_by_name(pad->dev.of_node, "lanes"); 196 if (!children) 197 return -ENODEV; 198 199 pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane), 200 GFP_KERNEL); 201 if (!pad->lanes) { 202 of_node_put(children); 203 return -ENOMEM; 204 } 205 206 for (i = 0; i < pad->soc->num_lanes; i++) { 207 struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i); 208 struct tegra_xusb_lane *lane; 209 210 /* skip disabled lanes */ 211 if (!np || !of_device_is_available(np)) { 212 of_node_put(np); 213 continue; 214 } 215 216 pad->lanes[i] = phy_create(&pad->dev, np, ops); 217 if (IS_ERR(pad->lanes[i])) { 218 err = PTR_ERR(pad->lanes[i]); 219 of_node_put(np); 220 goto remove; 221 } 222 223 lane = pad->ops->probe(pad, np, i); 224 if (IS_ERR(lane)) { 225 phy_destroy(pad->lanes[i]); 226 err = PTR_ERR(lane); 227 goto remove; 228 } 229 230 list_add_tail(&lane->list, &pad->padctl->lanes); 231 phy_set_drvdata(pad->lanes[i], lane); 232 } 233 234 pad->provider = of_phy_provider_register_full(&pad->dev, children, 235 tegra_xusb_pad_of_xlate); 236 if (IS_ERR(pad->provider)) { 237 err = PTR_ERR(pad->provider); 238 goto remove; 239 } 240 241 return 0; 242 243 remove: 244 while (i--) 245 tegra_xusb_lane_destroy(pad->lanes[i]); 246 247 of_node_put(children); 248 249 return err; 250 } 251 252 void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad) 253 { 254 unsigned int i = pad->soc->num_lanes; 255 256 of_phy_provider_unregister(pad->provider); 257 258 while (i--) 259 tegra_xusb_lane_destroy(pad->lanes[i]); 260 261 device_unregister(&pad->dev); 262 } 263 264 static struct tegra_xusb_pad * 265 tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl, 266 const struct tegra_xusb_pad_soc *soc) 267 { 268 struct tegra_xusb_pad *pad; 269 struct device_node *np; 270 int err; 271 272 np = tegra_xusb_find_pad_node(padctl, soc->name); 273 if (!np || !of_device_is_available(np)) 274 return NULL; 275 276 pad = soc->ops->probe(padctl, soc, np); 277 if (IS_ERR(pad)) { 278 err = PTR_ERR(pad); 279 dev_err(padctl->dev, "failed to create pad %s: %d\n", 280 soc->name, err); 281 return ERR_PTR(err); 282 } 283 284 /* XXX move this into ->probe() to avoid string comparison */ 285 if (strcmp(soc->name, "pcie") == 0) 286 padctl->pcie = pad; 287 288 if (strcmp(soc->name, "sata") == 0) 289 padctl->sata = pad; 290 291 if (strcmp(soc->name, "usb2") == 0) 292 padctl->usb2 = pad; 293 294 if (strcmp(soc->name, "ulpi") == 0) 295 padctl->ulpi = pad; 296 297 if (strcmp(soc->name, "hsic") == 0) 298 padctl->hsic = pad; 299 300 return pad; 301 } 302 303 static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl) 304 { 305 struct tegra_xusb_pad *pad, *tmp; 306 307 list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) { 308 list_del(&pad->list); 309 tegra_xusb_pad_unregister(pad); 310 } 311 } 312 313 static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl) 314 { 315 mutex_lock(&padctl->lock); 316 __tegra_xusb_remove_pads(padctl); 317 mutex_unlock(&padctl->lock); 318 } 319 320 static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane) 321 { 322 struct tegra_xusb_padctl *padctl = lane->pad->padctl; 323 const struct tegra_xusb_lane_soc *soc = lane->soc; 324 u32 value; 325 326 /* skip single function lanes */ 327 if (soc->num_funcs < 2) 328 return; 329 330 if (lane->pad->ops->iddq_enable) 331 lane->pad->ops->iddq_enable(lane); 332 333 /* choose function */ 334 value = padctl_readl(padctl, soc->offset); 335 value &= ~(soc->mask << soc->shift); 336 value |= lane->function << soc->shift; 337 padctl_writel(padctl, value, soc->offset); 338 339 if (lane->pad->ops->iddq_disable) 340 lane->pad->ops->iddq_disable(lane); 341 } 342 343 static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad) 344 { 345 unsigned int i; 346 347 for (i = 0; i < pad->soc->num_lanes; i++) { 348 struct tegra_xusb_lane *lane; 349 350 if (pad->lanes[i]) { 351 lane = phy_get_drvdata(pad->lanes[i]); 352 tegra_xusb_lane_program(lane); 353 } 354 } 355 } 356 357 static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl) 358 { 359 struct tegra_xusb_pad *pad; 360 unsigned int i; 361 362 mutex_lock(&padctl->lock); 363 364 for (i = 0; i < padctl->soc->num_pads; i++) { 365 const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i]; 366 int err; 367 368 pad = tegra_xusb_pad_create(padctl, soc); 369 if (IS_ERR(pad)) { 370 err = PTR_ERR(pad); 371 dev_err(padctl->dev, "failed to create pad %s: %d\n", 372 soc->name, err); 373 __tegra_xusb_remove_pads(padctl); 374 mutex_unlock(&padctl->lock); 375 return err; 376 } 377 378 if (!pad) 379 continue; 380 381 list_add_tail(&pad->list, &padctl->pads); 382 } 383 384 list_for_each_entry(pad, &padctl->pads, list) 385 tegra_xusb_pad_program(pad); 386 387 mutex_unlock(&padctl->lock); 388 return 0; 389 } 390 391 bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane, 392 const char *function) 393 { 394 const char *func = lane->soc->funcs[lane->function]; 395 396 return strcmp(function, func) == 0; 397 } 398 399 struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl, 400 const char *type, 401 unsigned int index) 402 { 403 struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV); 404 char *name; 405 406 name = kasprintf(GFP_KERNEL, "%s-%u", type, index); 407 if (!name) 408 return ERR_PTR(-ENOMEM); 409 410 list_for_each_entry(lane, &padctl->lanes, list) { 411 if (strcmp(lane->soc->name, name) == 0) { 412 hit = lane; 413 break; 414 } 415 } 416 417 kfree(name); 418 return hit; 419 } 420 421 struct tegra_xusb_lane * 422 tegra_xusb_port_find_lane(struct tegra_xusb_port *port, 423 const struct tegra_xusb_lane_map *map, 424 const char *function) 425 { 426 struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV); 427 428 for (; map->type; map++) { 429 if (port->index != map->port) 430 continue; 431 432 lane = tegra_xusb_find_lane(port->padctl, map->type, 433 map->index); 434 if (IS_ERR(lane)) 435 continue; 436 437 if (!tegra_xusb_lane_check(lane, function)) 438 continue; 439 440 if (!IS_ERR(match)) 441 dev_err(&port->dev, "conflicting match: %s-%u / %s\n", 442 map->type, map->index, match->soc->name); 443 else 444 match = lane; 445 } 446 447 return match; 448 } 449 450 static struct device_node * 451 tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type, 452 unsigned int index) 453 { 454 struct device_node *ports, *np; 455 char *name; 456 457 ports = of_get_child_by_name(padctl->dev->of_node, "ports"); 458 if (!ports) 459 return NULL; 460 461 name = kasprintf(GFP_KERNEL, "%s-%u", type, index); 462 if (!name) { 463 of_node_put(ports); 464 return NULL; 465 } 466 np = of_get_child_by_name(ports, name); 467 kfree(name); 468 of_node_put(ports); 469 470 return np; 471 } 472 473 struct tegra_xusb_port * 474 tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type, 475 unsigned int index) 476 { 477 struct tegra_xusb_port *port; 478 struct device_node *np; 479 480 np = tegra_xusb_find_port_node(padctl, type, index); 481 if (!np) 482 return NULL; 483 484 list_for_each_entry(port, &padctl->ports, list) { 485 if (np == port->dev.of_node) { 486 of_node_put(np); 487 return port; 488 } 489 } 490 491 of_node_put(np); 492 493 return NULL; 494 } 495 496 struct tegra_xusb_usb2_port * 497 tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index) 498 { 499 struct tegra_xusb_port *port; 500 501 port = tegra_xusb_find_port(padctl, "usb2", index); 502 if (port) 503 return to_usb2_port(port); 504 505 return NULL; 506 } 507 508 struct tegra_xusb_usb3_port * 509 tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index) 510 { 511 struct tegra_xusb_port *port; 512 513 port = tegra_xusb_find_port(padctl, "usb3", index); 514 if (port) 515 return to_usb3_port(port); 516 517 return NULL; 518 } 519 520 static void tegra_xusb_port_release(struct device *dev) 521 { 522 struct tegra_xusb_port *port = to_tegra_xusb_port(dev); 523 524 if (port->ops->release) 525 port->ops->release(port); 526 } 527 528 static const struct device_type tegra_xusb_port_type = { 529 .release = tegra_xusb_port_release, 530 }; 531 532 static int tegra_xusb_port_init(struct tegra_xusb_port *port, 533 struct tegra_xusb_padctl *padctl, 534 struct device_node *np, 535 const char *name, 536 unsigned int index) 537 { 538 int err; 539 540 INIT_LIST_HEAD(&port->list); 541 port->padctl = padctl; 542 port->index = index; 543 544 device_initialize(&port->dev); 545 port->dev.type = &tegra_xusb_port_type; 546 port->dev.of_node = of_node_get(np); 547 port->dev.parent = padctl->dev; 548 549 err = dev_set_name(&port->dev, "%s-%u", name, index); 550 if (err < 0) 551 goto unregister; 552 553 err = device_add(&port->dev); 554 if (err < 0) 555 goto unregister; 556 557 return 0; 558 559 unregister: 560 device_unregister(&port->dev); 561 return err; 562 } 563 564 static void tegra_xusb_port_unregister(struct tegra_xusb_port *port) 565 { 566 if (!IS_ERR_OR_NULL(port->usb_role_sw)) { 567 of_platform_depopulate(&port->dev); 568 usb_role_switch_unregister(port->usb_role_sw); 569 cancel_work_sync(&port->usb_phy_work); 570 usb_remove_phy(&port->usb_phy); 571 port->usb_phy.dev->driver = NULL; 572 } 573 574 if (port->ops->remove) 575 port->ops->remove(port); 576 577 device_unregister(&port->dev); 578 } 579 580 static const char *const modes[] = { 581 [USB_DR_MODE_UNKNOWN] = "", 582 [USB_DR_MODE_HOST] = "host", 583 [USB_DR_MODE_PERIPHERAL] = "peripheral", 584 [USB_DR_MODE_OTG] = "otg", 585 }; 586 587 static const char * const usb_roles[] = { 588 [USB_ROLE_NONE] = "none", 589 [USB_ROLE_HOST] = "host", 590 [USB_ROLE_DEVICE] = "device", 591 }; 592 593 static enum usb_phy_events to_usb_phy_event(enum usb_role role) 594 { 595 switch (role) { 596 case USB_ROLE_DEVICE: 597 return USB_EVENT_VBUS; 598 599 case USB_ROLE_HOST: 600 return USB_EVENT_ID; 601 602 default: 603 return USB_EVENT_NONE; 604 } 605 } 606 607 static void tegra_xusb_usb_phy_work(struct work_struct *work) 608 { 609 struct tegra_xusb_port *port = container_of(work, 610 struct tegra_xusb_port, 611 usb_phy_work); 612 enum usb_role role = usb_role_switch_get_role(port->usb_role_sw); 613 614 usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role)); 615 616 dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__, 617 usb_roles[role]); 618 619 atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy); 620 } 621 622 static int tegra_xusb_role_sw_set(struct usb_role_switch *sw, 623 enum usb_role role) 624 { 625 struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw); 626 627 dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]); 628 629 schedule_work(&port->usb_phy_work); 630 631 return 0; 632 } 633 634 static int tegra_xusb_set_peripheral(struct usb_otg *otg, 635 struct usb_gadget *gadget) 636 { 637 struct tegra_xusb_port *port = container_of(otg->usb_phy, 638 struct tegra_xusb_port, 639 usb_phy); 640 641 if (gadget != NULL) 642 schedule_work(&port->usb_phy_work); 643 644 return 0; 645 } 646 647 static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host) 648 { 649 struct tegra_xusb_port *port = container_of(otg->usb_phy, 650 struct tegra_xusb_port, 651 usb_phy); 652 653 if (host != NULL) 654 schedule_work(&port->usb_phy_work); 655 656 return 0; 657 } 658 659 660 static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port) 661 { 662 struct tegra_xusb_lane *lane; 663 struct usb_role_switch_desc role_sx_desc = { 664 .fwnode = dev_fwnode(&port->dev), 665 .set = tegra_xusb_role_sw_set, 666 .allow_userspace_control = true, 667 }; 668 int err = 0; 669 670 /* 671 * USB role switch driver needs parent driver owner info. This is a 672 * suboptimal solution. TODO: Need to revisit this in a follow-up patch 673 * where an optimal solution is possible with changes to USB role 674 * switch driver. 675 */ 676 port->dev.driver = devm_kzalloc(&port->dev, 677 sizeof(struct device_driver), 678 GFP_KERNEL); 679 if (!port->dev.driver) 680 return -ENOMEM; 681 682 port->dev.driver->owner = THIS_MODULE; 683 684 port->usb_role_sw = usb_role_switch_register(&port->dev, 685 &role_sx_desc); 686 if (IS_ERR(port->usb_role_sw)) { 687 err = PTR_ERR(port->usb_role_sw); 688 dev_err(&port->dev, "failed to register USB role switch: %d", 689 err); 690 return err; 691 } 692 693 INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work); 694 usb_role_switch_set_drvdata(port->usb_role_sw, port); 695 696 port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg), 697 GFP_KERNEL); 698 if (!port->usb_phy.otg) 699 return -ENOMEM; 700 701 lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index); 702 if (IS_ERR(lane)) 703 return PTR_ERR(lane); 704 705 /* 706 * Assign phy dev to usb-phy dev. Host/device drivers can use phy 707 * reference to retrieve usb-phy details. 708 */ 709 port->usb_phy.dev = &lane->pad->lanes[port->index]->dev; 710 port->usb_phy.dev->driver = port->dev.driver; 711 port->usb_phy.otg->usb_phy = &port->usb_phy; 712 port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral; 713 port->usb_phy.otg->set_host = tegra_xusb_set_host; 714 715 err = usb_add_phy_dev(&port->usb_phy); 716 if (err < 0) { 717 dev_err(&port->dev, "Failed to add USB PHY: %d\n", err); 718 return err; 719 } 720 721 /* populate connector entry */ 722 of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev); 723 724 return err; 725 } 726 727 static void tegra_xusb_parse_usb_role_default_mode(struct tegra_xusb_port *port) 728 { 729 enum usb_role role = USB_ROLE_NONE; 730 enum usb_dr_mode mode = usb_get_role_switch_default_mode(&port->dev); 731 732 if (mode == USB_DR_MODE_HOST) 733 role = USB_ROLE_HOST; 734 else if (mode == USB_DR_MODE_PERIPHERAL) 735 role = USB_ROLE_DEVICE; 736 737 if (role != USB_ROLE_NONE) { 738 usb_role_switch_set_role(port->usb_role_sw, role); 739 dev_dbg(&port->dev, "usb role default mode is %s", modes[mode]); 740 } 741 } 742 743 static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2) 744 { 745 struct tegra_xusb_port *port = &usb2->base; 746 struct device_node *np = port->dev.of_node; 747 const char *mode; 748 int err; 749 750 usb2->internal = of_property_read_bool(np, "nvidia,internal"); 751 752 if (!of_property_read_string(np, "mode", &mode)) { 753 int err = match_string(modes, ARRAY_SIZE(modes), mode); 754 if (err < 0) { 755 dev_err(&port->dev, "invalid value %s for \"mode\"\n", 756 mode); 757 usb2->mode = USB_DR_MODE_UNKNOWN; 758 } else { 759 usb2->mode = err; 760 } 761 } else { 762 usb2->mode = USB_DR_MODE_HOST; 763 } 764 765 /* usb-role-switch property is mandatory for OTG/Peripheral modes */ 766 if (usb2->mode == USB_DR_MODE_PERIPHERAL || 767 usb2->mode == USB_DR_MODE_OTG) { 768 if (of_property_read_bool(np, "usb-role-switch")) { 769 err = tegra_xusb_setup_usb_role_switch(port); 770 if (err < 0) 771 return err; 772 tegra_xusb_parse_usb_role_default_mode(port); 773 } else { 774 dev_err(&port->dev, "usb-role-switch not found for %s mode", 775 modes[usb2->mode]); 776 return -EINVAL; 777 } 778 } 779 780 usb2->supply = regulator_get(&port->dev, "vbus"); 781 return PTR_ERR_OR_ZERO(usb2->supply); 782 } 783 784 static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl, 785 unsigned int index) 786 { 787 struct tegra_xusb_usb2_port *usb2; 788 struct device_node *np; 789 int err = 0; 790 791 /* 792 * USB2 ports don't require additional properties, but if the port is 793 * marked as disabled there is no reason to register it. 794 */ 795 np = tegra_xusb_find_port_node(padctl, "usb2", index); 796 if (!np || !of_device_is_available(np)) 797 goto out; 798 799 usb2 = kzalloc(sizeof(*usb2), GFP_KERNEL); 800 if (!usb2) { 801 err = -ENOMEM; 802 goto out; 803 } 804 805 err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index); 806 if (err < 0) 807 goto out; 808 809 usb2->base.ops = padctl->soc->ports.usb2.ops; 810 811 usb2->base.lane = usb2->base.ops->map(&usb2->base); 812 if (IS_ERR(usb2->base.lane)) { 813 err = PTR_ERR(usb2->base.lane); 814 tegra_xusb_port_unregister(&usb2->base); 815 goto out; 816 } 817 818 err = tegra_xusb_usb2_port_parse_dt(usb2); 819 if (err < 0) { 820 tegra_xusb_port_unregister(&usb2->base); 821 goto out; 822 } 823 824 list_add_tail(&usb2->base.list, &padctl->ports); 825 826 out: 827 of_node_put(np); 828 return err; 829 } 830 831 void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port) 832 { 833 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); 834 835 kfree(usb2); 836 } 837 838 void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port) 839 { 840 struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); 841 842 regulator_put(usb2->supply); 843 } 844 845 static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi) 846 { 847 struct tegra_xusb_port *port = &ulpi->base; 848 struct device_node *np = port->dev.of_node; 849 850 ulpi->internal = of_property_read_bool(np, "nvidia,internal"); 851 852 return 0; 853 } 854 855 static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl, 856 unsigned int index) 857 { 858 struct tegra_xusb_ulpi_port *ulpi; 859 struct device_node *np; 860 int err = 0; 861 862 np = tegra_xusb_find_port_node(padctl, "ulpi", index); 863 if (!np || !of_device_is_available(np)) 864 goto out; 865 866 ulpi = kzalloc(sizeof(*ulpi), GFP_KERNEL); 867 if (!ulpi) { 868 err = -ENOMEM; 869 goto out; 870 } 871 872 err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index); 873 if (err < 0) 874 goto out; 875 876 ulpi->base.ops = padctl->soc->ports.ulpi.ops; 877 878 ulpi->base.lane = ulpi->base.ops->map(&ulpi->base); 879 if (IS_ERR(ulpi->base.lane)) { 880 err = PTR_ERR(ulpi->base.lane); 881 tegra_xusb_port_unregister(&ulpi->base); 882 goto out; 883 } 884 885 err = tegra_xusb_ulpi_port_parse_dt(ulpi); 886 if (err < 0) { 887 tegra_xusb_port_unregister(&ulpi->base); 888 goto out; 889 } 890 891 list_add_tail(&ulpi->base.list, &padctl->ports); 892 893 out: 894 of_node_put(np); 895 return err; 896 } 897 898 void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port) 899 { 900 struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port); 901 902 kfree(ulpi); 903 } 904 905 static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic) 906 { 907 /* XXX */ 908 return 0; 909 } 910 911 static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl, 912 unsigned int index) 913 { 914 struct tegra_xusb_hsic_port *hsic; 915 struct device_node *np; 916 int err = 0; 917 918 np = tegra_xusb_find_port_node(padctl, "hsic", index); 919 if (!np || !of_device_is_available(np)) 920 goto out; 921 922 hsic = kzalloc(sizeof(*hsic), GFP_KERNEL); 923 if (!hsic) { 924 err = -ENOMEM; 925 goto out; 926 } 927 928 err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index); 929 if (err < 0) 930 goto out; 931 932 hsic->base.ops = padctl->soc->ports.hsic.ops; 933 934 hsic->base.lane = hsic->base.ops->map(&hsic->base); 935 if (IS_ERR(hsic->base.lane)) { 936 err = PTR_ERR(hsic->base.lane); 937 goto out; 938 } 939 940 err = tegra_xusb_hsic_port_parse_dt(hsic); 941 if (err < 0) { 942 tegra_xusb_port_unregister(&hsic->base); 943 goto out; 944 } 945 946 list_add_tail(&hsic->base.list, &padctl->ports); 947 948 out: 949 of_node_put(np); 950 return err; 951 } 952 953 void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port) 954 { 955 struct tegra_xusb_hsic_port *hsic = to_hsic_port(port); 956 957 kfree(hsic); 958 } 959 960 static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3) 961 { 962 struct tegra_xusb_port *port = &usb3->base; 963 struct device_node *np = port->dev.of_node; 964 enum usb_device_speed maximum_speed; 965 u32 value; 966 int err; 967 968 err = of_property_read_u32(np, "nvidia,usb2-companion", &value); 969 if (err < 0) { 970 dev_err(&port->dev, "failed to read port: %d\n", err); 971 return err; 972 } 973 974 usb3->port = value; 975 976 usb3->internal = of_property_read_bool(np, "nvidia,internal"); 977 978 if (device_property_present(&port->dev, "maximum-speed")) { 979 maximum_speed = usb_get_maximum_speed(&port->dev); 980 if (maximum_speed == USB_SPEED_SUPER) 981 usb3->disable_gen2 = true; 982 else if (maximum_speed == USB_SPEED_SUPER_PLUS) 983 usb3->disable_gen2 = false; 984 else 985 return -EINVAL; 986 } 987 988 return 0; 989 } 990 991 static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl, 992 unsigned int index) 993 { 994 struct tegra_xusb_usb3_port *usb3; 995 struct device_node *np; 996 int err = 0; 997 998 /* 999 * If there is no supplemental configuration in the device tree the 1000 * port is unusable. But it is valid to configure only a single port, 1001 * hence return 0 instead of an error to allow ports to be optional. 1002 */ 1003 np = tegra_xusb_find_port_node(padctl, "usb3", index); 1004 if (!np || !of_device_is_available(np)) 1005 goto out; 1006 1007 usb3 = kzalloc(sizeof(*usb3), GFP_KERNEL); 1008 if (!usb3) { 1009 err = -ENOMEM; 1010 goto out; 1011 } 1012 1013 err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index); 1014 if (err < 0) 1015 goto out; 1016 1017 usb3->base.ops = padctl->soc->ports.usb3.ops; 1018 1019 usb3->base.lane = usb3->base.ops->map(&usb3->base); 1020 if (IS_ERR(usb3->base.lane)) { 1021 err = PTR_ERR(usb3->base.lane); 1022 goto out; 1023 } 1024 1025 err = tegra_xusb_usb3_port_parse_dt(usb3); 1026 if (err < 0) { 1027 tegra_xusb_port_unregister(&usb3->base); 1028 goto out; 1029 } 1030 1031 list_add_tail(&usb3->base.list, &padctl->ports); 1032 1033 out: 1034 of_node_put(np); 1035 return err; 1036 } 1037 1038 void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port) 1039 { 1040 struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port); 1041 1042 kfree(usb3); 1043 } 1044 1045 static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl) 1046 { 1047 struct tegra_xusb_port *port, *tmp; 1048 1049 list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) { 1050 list_del(&port->list); 1051 tegra_xusb_port_unregister(port); 1052 } 1053 } 1054 1055 static int tegra_xusb_find_unused_usb3_port(struct tegra_xusb_padctl *padctl) 1056 { 1057 struct device_node *np; 1058 unsigned int i; 1059 1060 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1061 np = tegra_xusb_find_port_node(padctl, "usb3", i); 1062 if (!np || !of_device_is_available(np)) 1063 return i; 1064 } 1065 1066 return -ENODEV; 1067 } 1068 1069 static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2) 1070 { 1071 unsigned int i; 1072 struct tegra_xusb_usb3_port *usb3; 1073 struct tegra_xusb_padctl *padctl = usb2->base.padctl; 1074 1075 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1076 usb3 = tegra_xusb_find_usb3_port(padctl, i); 1077 if (usb3 && usb3->port == usb2->base.index) 1078 return true; 1079 } 1080 1081 return false; 1082 } 1083 1084 static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2) 1085 { 1086 int fake; 1087 1088 /* Disable usb3_port_fake usage by default and assign if needed */ 1089 usb2->usb3_port_fake = -1; 1090 1091 if ((usb2->mode == USB_DR_MODE_OTG || 1092 usb2->mode == USB_DR_MODE_PERIPHERAL) && 1093 !tegra_xusb_port_is_companion(usb2)) { 1094 fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl); 1095 if (fake < 0) { 1096 dev_err(&usb2->base.dev, "no unused USB3 ports available\n"); 1097 return -ENODEV; 1098 } 1099 1100 dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake); 1101 usb2->usb3_port_fake = fake; 1102 } 1103 1104 return 0; 1105 } 1106 1107 static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl) 1108 { 1109 struct tegra_xusb_port *port; 1110 struct tegra_xusb_usb2_port *usb2; 1111 unsigned int i; 1112 int err = 0; 1113 1114 mutex_lock(&padctl->lock); 1115 1116 for (i = 0; i < padctl->soc->ports.usb2.count; i++) { 1117 err = tegra_xusb_add_usb2_port(padctl, i); 1118 if (err < 0) 1119 goto remove_ports; 1120 } 1121 1122 for (i = 0; i < padctl->soc->ports.ulpi.count; i++) { 1123 err = tegra_xusb_add_ulpi_port(padctl, i); 1124 if (err < 0) 1125 goto remove_ports; 1126 } 1127 1128 for (i = 0; i < padctl->soc->ports.hsic.count; i++) { 1129 err = tegra_xusb_add_hsic_port(padctl, i); 1130 if (err < 0) 1131 goto remove_ports; 1132 } 1133 1134 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1135 err = tegra_xusb_add_usb3_port(padctl, i); 1136 if (err < 0) 1137 goto remove_ports; 1138 } 1139 1140 if (padctl->soc->need_fake_usb3_port) { 1141 for (i = 0; i < padctl->soc->ports.usb2.count; i++) { 1142 usb2 = tegra_xusb_find_usb2_port(padctl, i); 1143 if (!usb2) 1144 continue; 1145 1146 err = tegra_xusb_update_usb3_fake_port(usb2); 1147 if (err < 0) 1148 goto remove_ports; 1149 } 1150 } 1151 1152 list_for_each_entry(port, &padctl->ports, list) { 1153 err = port->ops->enable(port); 1154 if (err < 0) 1155 dev_err(padctl->dev, "failed to enable port %s: %d\n", 1156 dev_name(&port->dev), err); 1157 } 1158 1159 goto unlock; 1160 1161 remove_ports: 1162 __tegra_xusb_remove_ports(padctl); 1163 unlock: 1164 mutex_unlock(&padctl->lock); 1165 return err; 1166 } 1167 1168 static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl) 1169 { 1170 mutex_lock(&padctl->lock); 1171 __tegra_xusb_remove_ports(padctl); 1172 mutex_unlock(&padctl->lock); 1173 } 1174 1175 static int tegra_xusb_padctl_probe(struct platform_device *pdev) 1176 { 1177 struct device_node *np = pdev->dev.of_node; 1178 const struct tegra_xusb_padctl_soc *soc; 1179 struct tegra_xusb_padctl *padctl; 1180 const struct of_device_id *match; 1181 int err; 1182 1183 /* for backwards compatibility with old device trees */ 1184 np = of_get_child_by_name(np, "pads"); 1185 if (!np) { 1186 dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n"); 1187 return tegra_xusb_padctl_legacy_probe(pdev); 1188 } 1189 1190 of_node_put(np); 1191 1192 match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node); 1193 soc = match->data; 1194 1195 padctl = soc->ops->probe(&pdev->dev, soc); 1196 if (IS_ERR(padctl)) 1197 return PTR_ERR(padctl); 1198 1199 platform_set_drvdata(pdev, padctl); 1200 INIT_LIST_HEAD(&padctl->ports); 1201 INIT_LIST_HEAD(&padctl->lanes); 1202 INIT_LIST_HEAD(&padctl->pads); 1203 mutex_init(&padctl->lock); 1204 1205 padctl->regs = devm_platform_ioremap_resource(pdev, 0); 1206 if (IS_ERR(padctl->regs)) { 1207 err = PTR_ERR(padctl->regs); 1208 goto remove; 1209 } 1210 1211 padctl->rst = devm_reset_control_get(&pdev->dev, NULL); 1212 if (IS_ERR(padctl->rst)) { 1213 err = PTR_ERR(padctl->rst); 1214 goto remove; 1215 } 1216 1217 padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies, 1218 sizeof(*padctl->supplies), GFP_KERNEL); 1219 if (!padctl->supplies) { 1220 err = -ENOMEM; 1221 goto remove; 1222 } 1223 1224 regulator_bulk_set_supply_names(padctl->supplies, 1225 padctl->soc->supply_names, 1226 padctl->soc->num_supplies); 1227 1228 err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies, 1229 padctl->supplies); 1230 if (err < 0) { 1231 dev_err_probe(&pdev->dev, err, "failed to get regulators\n"); 1232 goto remove; 1233 } 1234 1235 err = reset_control_deassert(padctl->rst); 1236 if (err < 0) 1237 goto remove; 1238 1239 err = regulator_bulk_enable(padctl->soc->num_supplies, 1240 padctl->supplies); 1241 if (err < 0) { 1242 dev_err(&pdev->dev, "failed to enable supplies: %d\n", err); 1243 goto reset; 1244 } 1245 1246 err = tegra_xusb_setup_pads(padctl); 1247 if (err < 0) { 1248 dev_err(&pdev->dev, "failed to setup pads: %d\n", err); 1249 goto power_down; 1250 } 1251 1252 err = tegra_xusb_setup_ports(padctl); 1253 if (err) { 1254 const char *level = KERN_ERR; 1255 1256 if (err == -EPROBE_DEFER) 1257 level = KERN_DEBUG; 1258 1259 dev_printk(level, &pdev->dev, 1260 dev_fmt("failed to setup XUSB ports: %d\n"), err); 1261 goto remove_pads; 1262 } 1263 1264 return 0; 1265 1266 remove_pads: 1267 tegra_xusb_remove_pads(padctl); 1268 power_down: 1269 regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies); 1270 reset: 1271 reset_control_assert(padctl->rst); 1272 remove: 1273 platform_set_drvdata(pdev, NULL); 1274 soc->ops->remove(padctl); 1275 return err; 1276 } 1277 1278 static void tegra_xusb_padctl_remove(struct platform_device *pdev) 1279 { 1280 struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev); 1281 int err; 1282 1283 tegra_xusb_remove_ports(padctl); 1284 tegra_xusb_remove_pads(padctl); 1285 1286 err = regulator_bulk_disable(padctl->soc->num_supplies, 1287 padctl->supplies); 1288 if (err < 0) 1289 dev_err(&pdev->dev, "failed to disable supplies: %d\n", err); 1290 1291 err = reset_control_assert(padctl->rst); 1292 if (err < 0) 1293 dev_err(&pdev->dev, "failed to assert reset: %d\n", err); 1294 1295 padctl->soc->ops->remove(padctl); 1296 } 1297 1298 static __maybe_unused int tegra_xusb_padctl_suspend_noirq(struct device *dev) 1299 { 1300 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); 1301 1302 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq) 1303 return padctl->soc->ops->suspend_noirq(padctl); 1304 1305 return 0; 1306 } 1307 1308 static __maybe_unused int tegra_xusb_padctl_resume_noirq(struct device *dev) 1309 { 1310 struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev); 1311 1312 if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq) 1313 return padctl->soc->ops->resume_noirq(padctl); 1314 1315 return 0; 1316 } 1317 1318 static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = { 1319 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq, 1320 tegra_xusb_padctl_resume_noirq) 1321 }; 1322 1323 static struct platform_driver tegra_xusb_padctl_driver = { 1324 .driver = { 1325 .name = "tegra-xusb-padctl", 1326 .of_match_table = tegra_xusb_padctl_of_match, 1327 .pm = &tegra_xusb_padctl_pm_ops, 1328 }, 1329 .probe = tegra_xusb_padctl_probe, 1330 .remove_new = tegra_xusb_padctl_remove, 1331 }; 1332 module_platform_driver(tegra_xusb_padctl_driver); 1333 1334 struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev) 1335 { 1336 struct tegra_xusb_padctl *padctl; 1337 struct platform_device *pdev; 1338 struct device_node *np; 1339 1340 np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0); 1341 if (!np) 1342 return ERR_PTR(-EINVAL); 1343 1344 /* 1345 * This is slightly ugly. A better implementation would be to keep a 1346 * registry of pad controllers, but since there will almost certainly 1347 * only ever be one per SoC that would be a little overkill. 1348 */ 1349 pdev = of_find_device_by_node(np); 1350 if (!pdev) { 1351 of_node_put(np); 1352 return ERR_PTR(-ENODEV); 1353 } 1354 1355 of_node_put(np); 1356 1357 padctl = platform_get_drvdata(pdev); 1358 if (!padctl) { 1359 put_device(&pdev->dev); 1360 return ERR_PTR(-EPROBE_DEFER); 1361 } 1362 1363 return padctl; 1364 } 1365 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get); 1366 1367 void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl) 1368 { 1369 if (padctl) 1370 put_device(padctl->dev); 1371 } 1372 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put); 1373 1374 int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl, 1375 unsigned int port) 1376 { 1377 if (padctl->soc->ops->usb3_save_context) 1378 return padctl->soc->ops->usb3_save_context(padctl, port); 1379 1380 return -ENOSYS; 1381 } 1382 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context); 1383 1384 int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl, 1385 unsigned int port, bool idle) 1386 { 1387 if (padctl->soc->ops->hsic_set_idle) 1388 return padctl->soc->ops->hsic_set_idle(padctl, port, idle); 1389 1390 return -ENOSYS; 1391 } 1392 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle); 1393 1394 int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy, 1395 enum usb_device_speed speed) 1396 { 1397 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1398 1399 if (lane->pad->ops->enable_phy_sleepwalk) 1400 return lane->pad->ops->enable_phy_sleepwalk(lane, speed); 1401 1402 return -EOPNOTSUPP; 1403 } 1404 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk); 1405 1406 int tegra_xusb_padctl_disable_phy_sleepwalk(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_sleepwalk) 1411 return lane->pad->ops->disable_phy_sleepwalk(lane); 1412 1413 return -EOPNOTSUPP; 1414 } 1415 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk); 1416 1417 int tegra_xusb_padctl_enable_phy_wake(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->enable_phy_wake) 1422 return lane->pad->ops->enable_phy_wake(lane); 1423 1424 return -EOPNOTSUPP; 1425 } 1426 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake); 1427 1428 int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy) 1429 { 1430 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1431 1432 if (lane->pad->ops->disable_phy_wake) 1433 return lane->pad->ops->disable_phy_wake(lane); 1434 1435 return -EOPNOTSUPP; 1436 } 1437 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake); 1438 1439 bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy) 1440 { 1441 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1442 1443 if (lane->pad->ops->remote_wake_detected) 1444 return lane->pad->ops->remote_wake_detected(lane); 1445 1446 return false; 1447 } 1448 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected); 1449 1450 int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl, 1451 unsigned int port, bool enable) 1452 { 1453 if (padctl->soc->ops->usb3_set_lfps_detect) 1454 return padctl->soc->ops->usb3_set_lfps_detect(padctl, port, 1455 enable); 1456 1457 return -ENOSYS; 1458 } 1459 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect); 1460 1461 int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl, 1462 bool val) 1463 { 1464 if (padctl->soc->ops->vbus_override) 1465 return padctl->soc->ops->vbus_override(padctl, val); 1466 1467 return -ENOTSUPP; 1468 } 1469 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override); 1470 1471 int tegra_phy_xusb_utmi_port_reset(struct phy *phy) 1472 { 1473 struct tegra_xusb_lane *lane = phy_get_drvdata(phy); 1474 struct tegra_xusb_padctl *padctl = lane->pad->padctl; 1475 1476 if (padctl->soc->ops->utmi_port_reset) 1477 return padctl->soc->ops->utmi_port_reset(phy); 1478 1479 return -ENOTSUPP; 1480 } 1481 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset); 1482 1483 void tegra_phy_xusb_utmi_pad_power_on(struct phy *phy) 1484 { 1485 struct tegra_xusb_lane *lane; 1486 struct tegra_xusb_padctl *padctl; 1487 1488 if (!phy) 1489 return; 1490 1491 lane = phy_get_drvdata(phy); 1492 padctl = lane->pad->padctl; 1493 1494 if (padctl->soc->ops->utmi_pad_power_on) 1495 padctl->soc->ops->utmi_pad_power_on(phy); 1496 } 1497 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_on); 1498 1499 void tegra_phy_xusb_utmi_pad_power_down(struct phy *phy) 1500 { 1501 struct tegra_xusb_lane *lane; 1502 struct tegra_xusb_padctl *padctl; 1503 1504 if (!phy) 1505 return; 1506 1507 lane = phy_get_drvdata(phy); 1508 padctl = lane->pad->padctl; 1509 1510 if (padctl->soc->ops->utmi_pad_power_down) 1511 padctl->soc->ops->utmi_pad_power_down(phy); 1512 } 1513 EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_pad_power_down); 1514 1515 int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl, 1516 unsigned int port) 1517 { 1518 struct tegra_xusb_usb2_port *usb2; 1519 struct tegra_xusb_usb3_port *usb3; 1520 int i; 1521 1522 usb2 = tegra_xusb_find_usb2_port(padctl, port); 1523 if (!usb2) 1524 return -EINVAL; 1525 1526 for (i = 0; i < padctl->soc->ports.usb3.count; i++) { 1527 usb3 = tegra_xusb_find_usb3_port(padctl, i); 1528 if (usb3 && usb3->port == usb2->base.index) 1529 return usb3->base.index; 1530 } 1531 1532 return -ENODEV; 1533 } 1534 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion); 1535 1536 int tegra_xusb_padctl_get_port_number(struct phy *phy) 1537 { 1538 struct tegra_xusb_lane *lane; 1539 1540 if (!phy) 1541 return -ENODEV; 1542 1543 lane = phy_get_drvdata(phy); 1544 1545 return lane->index; 1546 } 1547 EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_port_number); 1548 1549 MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>"); 1550 MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver"); 1551 MODULE_LICENSE("GPL v2"); 1552