1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * USB Type-C Connector Class 4 * 5 * Copyright (C) 2017, Intel Corporation 6 * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/mutex.h> 11 #include <linux/property.h> 12 #include <linux/slab.h> 13 #include <linux/usb/pd_vdo.h> 14 #include <linux/usb/typec_mux.h> 15 16 #include "bus.h" 17 #include "class.h" 18 19 static DEFINE_IDA(typec_index_ida); 20 21 struct class typec_class = { 22 .name = "typec", 23 .owner = THIS_MODULE, 24 }; 25 26 /* ------------------------------------------------------------------------- */ 27 /* Common attributes */ 28 29 static const char * const typec_accessory_modes[] = { 30 [TYPEC_ACCESSORY_NONE] = "none", 31 [TYPEC_ACCESSORY_AUDIO] = "analog_audio", 32 [TYPEC_ACCESSORY_DEBUG] = "debug", 33 }; 34 35 /* Product types defined in USB PD Specification R3.0 V2.0 */ 36 static const char * const product_type_ufp[8] = { 37 [IDH_PTYPE_NOT_UFP] = "not_ufp", 38 [IDH_PTYPE_HUB] = "hub", 39 [IDH_PTYPE_PERIPH] = "peripheral", 40 [IDH_PTYPE_PSD] = "psd", 41 [IDH_PTYPE_AMA] = "ama", 42 }; 43 44 static const char * const product_type_dfp[8] = { 45 [IDH_PTYPE_NOT_DFP] = "not_dfp", 46 [IDH_PTYPE_DFP_HUB] = "hub", 47 [IDH_PTYPE_DFP_HOST] = "host", 48 [IDH_PTYPE_DFP_PB] = "power_brick", 49 }; 50 51 static const char * const product_type_cable[8] = { 52 [IDH_PTYPE_NOT_CABLE] = "not_cable", 53 [IDH_PTYPE_PCABLE] = "passive", 54 [IDH_PTYPE_ACABLE] = "active", 55 [IDH_PTYPE_VPD] = "vpd", 56 }; 57 58 static struct usb_pd_identity *get_pd_identity(struct device *dev) 59 { 60 if (is_typec_partner(dev)) { 61 struct typec_partner *partner = to_typec_partner(dev); 62 63 return partner->identity; 64 } else if (is_typec_cable(dev)) { 65 struct typec_cable *cable = to_typec_cable(dev); 66 67 return cable->identity; 68 } 69 return NULL; 70 } 71 72 static const char *get_pd_product_type(struct device *dev) 73 { 74 struct typec_port *port = to_typec_port(dev->parent); 75 struct usb_pd_identity *id = get_pd_identity(dev); 76 const char *ptype = NULL; 77 78 if (is_typec_partner(dev)) { 79 if (!id) 80 return NULL; 81 82 if (port->data_role == TYPEC_HOST) 83 ptype = product_type_ufp[PD_IDH_PTYPE(id->id_header)]; 84 else 85 ptype = product_type_dfp[PD_IDH_DFP_PTYPE(id->id_header)]; 86 } else if (is_typec_cable(dev)) { 87 if (id) 88 ptype = product_type_cable[PD_IDH_PTYPE(id->id_header)]; 89 else 90 ptype = to_typec_cable(dev)->active ? 91 product_type_cable[IDH_PTYPE_ACABLE] : 92 product_type_cable[IDH_PTYPE_PCABLE]; 93 } 94 95 return ptype; 96 } 97 98 static ssize_t id_header_show(struct device *dev, struct device_attribute *attr, 99 char *buf) 100 { 101 struct usb_pd_identity *id = get_pd_identity(dev); 102 103 return sprintf(buf, "0x%08x\n", id->id_header); 104 } 105 static DEVICE_ATTR_RO(id_header); 106 107 static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr, 108 char *buf) 109 { 110 struct usb_pd_identity *id = get_pd_identity(dev); 111 112 return sprintf(buf, "0x%08x\n", id->cert_stat); 113 } 114 static DEVICE_ATTR_RO(cert_stat); 115 116 static ssize_t product_show(struct device *dev, struct device_attribute *attr, 117 char *buf) 118 { 119 struct usb_pd_identity *id = get_pd_identity(dev); 120 121 return sprintf(buf, "0x%08x\n", id->product); 122 } 123 static DEVICE_ATTR_RO(product); 124 125 static ssize_t product_type_vdo1_show(struct device *dev, struct device_attribute *attr, 126 char *buf) 127 { 128 struct usb_pd_identity *id = get_pd_identity(dev); 129 130 return sysfs_emit(buf, "0x%08x\n", id->vdo[0]); 131 } 132 static DEVICE_ATTR_RO(product_type_vdo1); 133 134 static ssize_t product_type_vdo2_show(struct device *dev, struct device_attribute *attr, 135 char *buf) 136 { 137 struct usb_pd_identity *id = get_pd_identity(dev); 138 139 return sysfs_emit(buf, "0x%08x\n", id->vdo[1]); 140 } 141 static DEVICE_ATTR_RO(product_type_vdo2); 142 143 static ssize_t product_type_vdo3_show(struct device *dev, struct device_attribute *attr, 144 char *buf) 145 { 146 struct usb_pd_identity *id = get_pd_identity(dev); 147 148 return sysfs_emit(buf, "0x%08x\n", id->vdo[2]); 149 } 150 static DEVICE_ATTR_RO(product_type_vdo3); 151 152 static struct attribute *usb_pd_id_attrs[] = { 153 &dev_attr_id_header.attr, 154 &dev_attr_cert_stat.attr, 155 &dev_attr_product.attr, 156 &dev_attr_product_type_vdo1.attr, 157 &dev_attr_product_type_vdo2.attr, 158 &dev_attr_product_type_vdo3.attr, 159 NULL 160 }; 161 162 static const struct attribute_group usb_pd_id_group = { 163 .name = "identity", 164 .attrs = usb_pd_id_attrs, 165 }; 166 167 static const struct attribute_group *usb_pd_id_groups[] = { 168 &usb_pd_id_group, 169 NULL, 170 }; 171 172 static void typec_product_type_notify(struct device *dev) 173 { 174 char *envp[2] = { }; 175 const char *ptype; 176 177 ptype = get_pd_product_type(dev); 178 if (!ptype) 179 return; 180 181 sysfs_notify(&dev->kobj, NULL, "type"); 182 183 envp[0] = kasprintf(GFP_KERNEL, "PRODUCT_TYPE=%s", ptype); 184 if (!envp[0]) 185 return; 186 187 kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 188 kfree(envp[0]); 189 } 190 191 static void typec_report_identity(struct device *dev) 192 { 193 sysfs_notify(&dev->kobj, "identity", "id_header"); 194 sysfs_notify(&dev->kobj, "identity", "cert_stat"); 195 sysfs_notify(&dev->kobj, "identity", "product"); 196 sysfs_notify(&dev->kobj, "identity", "product_type_vdo1"); 197 sysfs_notify(&dev->kobj, "identity", "product_type_vdo2"); 198 sysfs_notify(&dev->kobj, "identity", "product_type_vdo3"); 199 typec_product_type_notify(dev); 200 } 201 202 static ssize_t 203 type_show(struct device *dev, struct device_attribute *attr, char *buf) 204 { 205 const char *ptype; 206 207 ptype = get_pd_product_type(dev); 208 if (!ptype) 209 return 0; 210 211 return sysfs_emit(buf, "%s\n", ptype); 212 } 213 static DEVICE_ATTR_RO(type); 214 215 static ssize_t usb_power_delivery_revision_show(struct device *dev, 216 struct device_attribute *attr, 217 char *buf); 218 static DEVICE_ATTR_RO(usb_power_delivery_revision); 219 220 /* ------------------------------------------------------------------------- */ 221 /* Alternate Modes */ 222 223 static int altmode_match(struct device *dev, void *data) 224 { 225 struct typec_altmode *adev = to_typec_altmode(dev); 226 struct typec_device_id *id = data; 227 228 if (!is_typec_altmode(dev)) 229 return 0; 230 231 return ((adev->svid == id->svid) && (adev->mode == id->mode)); 232 } 233 234 static void typec_altmode_set_partner(struct altmode *altmode) 235 { 236 struct typec_altmode *adev = &altmode->adev; 237 struct typec_device_id id = { adev->svid, adev->mode, }; 238 struct typec_port *port = typec_altmode2port(adev); 239 struct altmode *partner; 240 struct device *dev; 241 242 dev = device_find_child(&port->dev, &id, altmode_match); 243 if (!dev) 244 return; 245 246 /* Bind the port alt mode to the partner/plug alt mode. */ 247 partner = to_altmode(to_typec_altmode(dev)); 248 altmode->partner = partner; 249 250 /* Bind the partner/plug alt mode to the port alt mode. */ 251 if (is_typec_plug(adev->dev.parent)) { 252 struct typec_plug *plug = to_typec_plug(adev->dev.parent); 253 254 partner->plug[plug->index] = altmode; 255 } else { 256 partner->partner = altmode; 257 } 258 } 259 260 static void typec_altmode_put_partner(struct altmode *altmode) 261 { 262 struct altmode *partner = altmode->partner; 263 struct typec_altmode *adev; 264 265 if (!partner) 266 return; 267 268 adev = &partner->adev; 269 270 if (is_typec_plug(adev->dev.parent)) { 271 struct typec_plug *plug = to_typec_plug(adev->dev.parent); 272 273 partner->plug[plug->index] = NULL; 274 } else { 275 partner->partner = NULL; 276 } 277 put_device(&adev->dev); 278 } 279 280 /** 281 * typec_altmode_update_active - Report Enter/Exit mode 282 * @adev: Handle to the alternate mode 283 * @active: True when the mode has been entered 284 * 285 * If a partner or cable plug executes Enter/Exit Mode command successfully, the 286 * drivers use this routine to report the updated state of the mode. 287 */ 288 void typec_altmode_update_active(struct typec_altmode *adev, bool active) 289 { 290 char dir[6]; 291 292 if (adev->active == active) 293 return; 294 295 if (!is_typec_port(adev->dev.parent) && adev->dev.driver) { 296 if (!active) 297 module_put(adev->dev.driver->owner); 298 else 299 WARN_ON(!try_module_get(adev->dev.driver->owner)); 300 } 301 302 adev->active = active; 303 snprintf(dir, sizeof(dir), "mode%d", adev->mode); 304 sysfs_notify(&adev->dev.kobj, dir, "active"); 305 sysfs_notify(&adev->dev.kobj, NULL, "active"); 306 kobject_uevent(&adev->dev.kobj, KOBJ_CHANGE); 307 } 308 EXPORT_SYMBOL_GPL(typec_altmode_update_active); 309 310 /** 311 * typec_altmode2port - Alternate Mode to USB Type-C port 312 * @alt: The Alternate Mode 313 * 314 * Returns handle to the port that a cable plug or partner with @alt is 315 * connected to. 316 */ 317 struct typec_port *typec_altmode2port(struct typec_altmode *alt) 318 { 319 if (is_typec_plug(alt->dev.parent)) 320 return to_typec_port(alt->dev.parent->parent->parent); 321 if (is_typec_partner(alt->dev.parent)) 322 return to_typec_port(alt->dev.parent->parent); 323 if (is_typec_port(alt->dev.parent)) 324 return to_typec_port(alt->dev.parent); 325 326 return NULL; 327 } 328 EXPORT_SYMBOL_GPL(typec_altmode2port); 329 330 static ssize_t 331 vdo_show(struct device *dev, struct device_attribute *attr, char *buf) 332 { 333 struct typec_altmode *alt = to_typec_altmode(dev); 334 335 return sprintf(buf, "0x%08x\n", alt->vdo); 336 } 337 static DEVICE_ATTR_RO(vdo); 338 339 static ssize_t 340 description_show(struct device *dev, struct device_attribute *attr, char *buf) 341 { 342 struct typec_altmode *alt = to_typec_altmode(dev); 343 344 return sprintf(buf, "%s\n", alt->desc ? alt->desc : ""); 345 } 346 static DEVICE_ATTR_RO(description); 347 348 static ssize_t 349 active_show(struct device *dev, struct device_attribute *attr, char *buf) 350 { 351 struct typec_altmode *alt = to_typec_altmode(dev); 352 353 return sprintf(buf, "%s\n", alt->active ? "yes" : "no"); 354 } 355 356 static ssize_t active_store(struct device *dev, struct device_attribute *attr, 357 const char *buf, size_t size) 358 { 359 struct typec_altmode *adev = to_typec_altmode(dev); 360 struct altmode *altmode = to_altmode(adev); 361 bool enter; 362 int ret; 363 364 ret = kstrtobool(buf, &enter); 365 if (ret) 366 return ret; 367 368 if (adev->active == enter) 369 return size; 370 371 if (is_typec_port(adev->dev.parent)) { 372 typec_altmode_update_active(adev, enter); 373 374 /* Make sure that the partner exits the mode before disabling */ 375 if (altmode->partner && !enter && altmode->partner->adev.active) 376 typec_altmode_exit(&altmode->partner->adev); 377 } else if (altmode->partner) { 378 if (enter && !altmode->partner->adev.active) { 379 dev_warn(dev, "port has the mode disabled\n"); 380 return -EPERM; 381 } 382 } 383 384 /* Note: If there is no driver, the mode will not be entered */ 385 if (adev->ops && adev->ops->activate) { 386 ret = adev->ops->activate(adev, enter); 387 if (ret) 388 return ret; 389 } 390 391 return size; 392 } 393 static DEVICE_ATTR_RW(active); 394 395 static ssize_t 396 supported_roles_show(struct device *dev, struct device_attribute *attr, 397 char *buf) 398 { 399 struct altmode *alt = to_altmode(to_typec_altmode(dev)); 400 ssize_t ret; 401 402 switch (alt->roles) { 403 case TYPEC_PORT_SRC: 404 ret = sprintf(buf, "source\n"); 405 break; 406 case TYPEC_PORT_SNK: 407 ret = sprintf(buf, "sink\n"); 408 break; 409 case TYPEC_PORT_DRP: 410 default: 411 ret = sprintf(buf, "source sink\n"); 412 break; 413 } 414 return ret; 415 } 416 static DEVICE_ATTR_RO(supported_roles); 417 418 static ssize_t 419 mode_show(struct device *dev, struct device_attribute *attr, char *buf) 420 { 421 struct typec_altmode *adev = to_typec_altmode(dev); 422 423 return sprintf(buf, "%u\n", adev->mode); 424 } 425 static DEVICE_ATTR_RO(mode); 426 427 static ssize_t 428 svid_show(struct device *dev, struct device_attribute *attr, char *buf) 429 { 430 struct typec_altmode *adev = to_typec_altmode(dev); 431 432 return sprintf(buf, "%04x\n", adev->svid); 433 } 434 static DEVICE_ATTR_RO(svid); 435 436 static struct attribute *typec_altmode_attrs[] = { 437 &dev_attr_active.attr, 438 &dev_attr_mode.attr, 439 &dev_attr_svid.attr, 440 &dev_attr_vdo.attr, 441 NULL 442 }; 443 444 static umode_t typec_altmode_attr_is_visible(struct kobject *kobj, 445 struct attribute *attr, int n) 446 { 447 struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj)); 448 449 if (attr == &dev_attr_active.attr) 450 if (!adev->ops || !adev->ops->activate) 451 return 0444; 452 453 return attr->mode; 454 } 455 456 static const struct attribute_group typec_altmode_group = { 457 .is_visible = typec_altmode_attr_is_visible, 458 .attrs = typec_altmode_attrs, 459 }; 460 461 static const struct attribute_group *typec_altmode_groups[] = { 462 &typec_altmode_group, 463 NULL 464 }; 465 466 static int altmode_id_get(struct device *dev) 467 { 468 struct ida *ids; 469 470 if (is_typec_partner(dev)) 471 ids = &to_typec_partner(dev)->mode_ids; 472 else if (is_typec_plug(dev)) 473 ids = &to_typec_plug(dev)->mode_ids; 474 else 475 ids = &to_typec_port(dev)->mode_ids; 476 477 return ida_simple_get(ids, 0, 0, GFP_KERNEL); 478 } 479 480 static void altmode_id_remove(struct device *dev, int id) 481 { 482 struct ida *ids; 483 484 if (is_typec_partner(dev)) 485 ids = &to_typec_partner(dev)->mode_ids; 486 else if (is_typec_plug(dev)) 487 ids = &to_typec_plug(dev)->mode_ids; 488 else 489 ids = &to_typec_port(dev)->mode_ids; 490 491 ida_simple_remove(ids, id); 492 } 493 494 static void typec_altmode_release(struct device *dev) 495 { 496 struct altmode *alt = to_altmode(to_typec_altmode(dev)); 497 498 typec_altmode_put_partner(alt); 499 500 altmode_id_remove(alt->adev.dev.parent, alt->id); 501 kfree(alt); 502 } 503 504 const struct device_type typec_altmode_dev_type = { 505 .name = "typec_alternate_mode", 506 .groups = typec_altmode_groups, 507 .release = typec_altmode_release, 508 }; 509 510 static struct typec_altmode * 511 typec_register_altmode(struct device *parent, 512 const struct typec_altmode_desc *desc) 513 { 514 unsigned int id = altmode_id_get(parent); 515 bool is_port = is_typec_port(parent); 516 struct altmode *alt; 517 int ret; 518 519 alt = kzalloc(sizeof(*alt), GFP_KERNEL); 520 if (!alt) 521 return ERR_PTR(-ENOMEM); 522 523 alt->adev.svid = desc->svid; 524 alt->adev.mode = desc->mode; 525 alt->adev.vdo = desc->vdo; 526 alt->roles = desc->roles; 527 alt->id = id; 528 529 alt->attrs[0] = &dev_attr_vdo.attr; 530 alt->attrs[1] = &dev_attr_description.attr; 531 alt->attrs[2] = &dev_attr_active.attr; 532 533 if (is_port) { 534 alt->attrs[3] = &dev_attr_supported_roles.attr; 535 alt->adev.active = true; /* Enabled by default */ 536 } 537 538 sprintf(alt->group_name, "mode%d", desc->mode); 539 alt->group.name = alt->group_name; 540 alt->group.attrs = alt->attrs; 541 alt->groups[0] = &alt->group; 542 543 alt->adev.dev.parent = parent; 544 alt->adev.dev.groups = alt->groups; 545 alt->adev.dev.type = &typec_altmode_dev_type; 546 dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id); 547 548 /* Link partners and plugs with the ports */ 549 if (!is_port) 550 typec_altmode_set_partner(alt); 551 552 /* The partners are bind to drivers */ 553 if (is_typec_partner(parent)) 554 alt->adev.dev.bus = &typec_bus; 555 556 /* Plug alt modes need a class to generate udev events. */ 557 if (is_typec_plug(parent)) 558 alt->adev.dev.class = &typec_class; 559 560 ret = device_register(&alt->adev.dev); 561 if (ret) { 562 dev_err(parent, "failed to register alternate mode (%d)\n", 563 ret); 564 put_device(&alt->adev.dev); 565 return ERR_PTR(ret); 566 } 567 568 return &alt->adev; 569 } 570 571 /** 572 * typec_unregister_altmode - Unregister Alternate Mode 573 * @adev: The alternate mode to be unregistered 574 * 575 * Unregister device created with typec_partner_register_altmode(), 576 * typec_plug_register_altmode() or typec_port_register_altmode(). 577 */ 578 void typec_unregister_altmode(struct typec_altmode *adev) 579 { 580 if (IS_ERR_OR_NULL(adev)) 581 return; 582 typec_mux_put(to_altmode(adev)->mux); 583 device_unregister(&adev->dev); 584 } 585 EXPORT_SYMBOL_GPL(typec_unregister_altmode); 586 587 /* ------------------------------------------------------------------------- */ 588 /* Type-C Partners */ 589 590 static ssize_t accessory_mode_show(struct device *dev, 591 struct device_attribute *attr, 592 char *buf) 593 { 594 struct typec_partner *p = to_typec_partner(dev); 595 596 return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]); 597 } 598 static DEVICE_ATTR_RO(accessory_mode); 599 600 static ssize_t supports_usb_power_delivery_show(struct device *dev, 601 struct device_attribute *attr, 602 char *buf) 603 { 604 struct typec_partner *p = to_typec_partner(dev); 605 606 return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no"); 607 } 608 static DEVICE_ATTR_RO(supports_usb_power_delivery); 609 610 static ssize_t number_of_alternate_modes_show(struct device *dev, struct device_attribute *attr, 611 char *buf) 612 { 613 struct typec_partner *partner; 614 struct typec_plug *plug; 615 int num_altmodes; 616 617 if (is_typec_partner(dev)) { 618 partner = to_typec_partner(dev); 619 num_altmodes = partner->num_altmodes; 620 } else if (is_typec_plug(dev)) { 621 plug = to_typec_plug(dev); 622 num_altmodes = plug->num_altmodes; 623 } else { 624 return 0; 625 } 626 627 return sysfs_emit(buf, "%d\n", num_altmodes); 628 } 629 static DEVICE_ATTR_RO(number_of_alternate_modes); 630 631 static struct attribute *typec_partner_attrs[] = { 632 &dev_attr_accessory_mode.attr, 633 &dev_attr_supports_usb_power_delivery.attr, 634 &dev_attr_number_of_alternate_modes.attr, 635 &dev_attr_type.attr, 636 &dev_attr_usb_power_delivery_revision.attr, 637 NULL 638 }; 639 640 static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 641 { 642 struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj)); 643 644 if (attr == &dev_attr_number_of_alternate_modes.attr) { 645 if (partner->num_altmodes < 0) 646 return 0; 647 } 648 649 if (attr == &dev_attr_type.attr) 650 if (!get_pd_product_type(kobj_to_dev(kobj))) 651 return 0; 652 653 return attr->mode; 654 } 655 656 static const struct attribute_group typec_partner_group = { 657 .is_visible = typec_partner_attr_is_visible, 658 .attrs = typec_partner_attrs 659 }; 660 661 static const struct attribute_group *typec_partner_groups[] = { 662 &typec_partner_group, 663 NULL 664 }; 665 666 static void typec_partner_release(struct device *dev) 667 { 668 struct typec_partner *partner = to_typec_partner(dev); 669 670 ida_destroy(&partner->mode_ids); 671 kfree(partner); 672 } 673 674 const struct device_type typec_partner_dev_type = { 675 .name = "typec_partner", 676 .groups = typec_partner_groups, 677 .release = typec_partner_release, 678 }; 679 680 /** 681 * typec_partner_set_identity - Report result from Discover Identity command 682 * @partner: The partner updated identity values 683 * 684 * This routine is used to report that the result of Discover Identity USB power 685 * delivery command has become available. 686 */ 687 int typec_partner_set_identity(struct typec_partner *partner) 688 { 689 if (!partner->identity) 690 return -EINVAL; 691 692 typec_report_identity(&partner->dev); 693 return 0; 694 } 695 EXPORT_SYMBOL_GPL(typec_partner_set_identity); 696 697 /** 698 * typec_partner_set_pd_revision - Set the PD revision supported by the partner 699 * @partner: The partner to be updated. 700 * @pd_revision: USB Power Delivery Specification Revision supported by partner 701 * 702 * This routine is used to report that the PD revision of the port partner has 703 * become available. 704 */ 705 void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision) 706 { 707 if (partner->pd_revision == pd_revision) 708 return; 709 710 partner->pd_revision = pd_revision; 711 sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision"); 712 if (pd_revision != 0 && !partner->usb_pd) { 713 partner->usb_pd = 1; 714 sysfs_notify(&partner->dev.kobj, NULL, 715 "supports_usb_power_delivery"); 716 } 717 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 718 } 719 EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision); 720 721 /** 722 * typec_partner_set_num_altmodes - Set the number of available partner altmodes 723 * @partner: The partner to be updated. 724 * @num_altmodes: The number of altmodes we want to specify as available. 725 * 726 * This routine is used to report the number of alternate modes supported by the 727 * partner. This value is *not* enforced in alternate mode registration routines. 728 * 729 * @partner.num_altmodes is set to -1 on partner registration, denoting that 730 * a valid value has not been set for it yet. 731 * 732 * Returns 0 on success or negative error number on failure. 733 */ 734 int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes) 735 { 736 int ret; 737 738 if (num_altmodes < 0) 739 return -EINVAL; 740 741 partner->num_altmodes = num_altmodes; 742 ret = sysfs_update_group(&partner->dev.kobj, &typec_partner_group); 743 if (ret < 0) 744 return ret; 745 746 sysfs_notify(&partner->dev.kobj, NULL, "number_of_alternate_modes"); 747 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 748 749 return 0; 750 } 751 EXPORT_SYMBOL_GPL(typec_partner_set_num_altmodes); 752 753 /** 754 * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode 755 * @partner: USB Type-C Partner that supports the alternate mode 756 * @desc: Description of the alternate mode 757 * 758 * This routine is used to register each alternate mode individually that 759 * @partner has listed in response to Discover SVIDs command. The modes for a 760 * SVID listed in response to Discover Modes command need to be listed in an 761 * array in @desc. 762 * 763 * Returns handle to the alternate mode on success or ERR_PTR on failure. 764 */ 765 struct typec_altmode * 766 typec_partner_register_altmode(struct typec_partner *partner, 767 const struct typec_altmode_desc *desc) 768 { 769 return typec_register_altmode(&partner->dev, desc); 770 } 771 EXPORT_SYMBOL_GPL(typec_partner_register_altmode); 772 773 /** 774 * typec_partner_set_svdm_version - Set negotiated Structured VDM (SVDM) Version 775 * @partner: USB Type-C Partner that supports SVDM 776 * @svdm_version: Negotiated SVDM Version 777 * 778 * This routine is used to save the negotiated SVDM Version. 779 */ 780 void typec_partner_set_svdm_version(struct typec_partner *partner, 781 enum usb_pd_svdm_ver svdm_version) 782 { 783 partner->svdm_version = svdm_version; 784 } 785 EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version); 786 787 /** 788 * typec_register_partner - Register a USB Type-C Partner 789 * @port: The USB Type-C Port the partner is connected to 790 * @desc: Description of the partner 791 * 792 * Registers a device for USB Type-C Partner described in @desc. 793 * 794 * Returns handle to the partner on success or ERR_PTR on failure. 795 */ 796 struct typec_partner *typec_register_partner(struct typec_port *port, 797 struct typec_partner_desc *desc) 798 { 799 struct typec_partner *partner; 800 int ret; 801 802 partner = kzalloc(sizeof(*partner), GFP_KERNEL); 803 if (!partner) 804 return ERR_PTR(-ENOMEM); 805 806 ida_init(&partner->mode_ids); 807 partner->usb_pd = desc->usb_pd; 808 partner->accessory = desc->accessory; 809 partner->num_altmodes = -1; 810 partner->pd_revision = desc->pd_revision; 811 partner->svdm_version = port->cap->svdm_version; 812 813 if (desc->identity) { 814 /* 815 * Creating directory for the identity only if the driver is 816 * able to provide data to it. 817 */ 818 partner->dev.groups = usb_pd_id_groups; 819 partner->identity = desc->identity; 820 } 821 822 partner->dev.class = &typec_class; 823 partner->dev.parent = &port->dev; 824 partner->dev.type = &typec_partner_dev_type; 825 dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev)); 826 827 ret = device_register(&partner->dev); 828 if (ret) { 829 dev_err(&port->dev, "failed to register partner (%d)\n", ret); 830 put_device(&partner->dev); 831 return ERR_PTR(ret); 832 } 833 834 return partner; 835 } 836 EXPORT_SYMBOL_GPL(typec_register_partner); 837 838 /** 839 * typec_unregister_partner - Unregister a USB Type-C Partner 840 * @partner: The partner to be unregistered 841 * 842 * Unregister device created with typec_register_partner(). 843 */ 844 void typec_unregister_partner(struct typec_partner *partner) 845 { 846 if (!IS_ERR_OR_NULL(partner)) 847 device_unregister(&partner->dev); 848 } 849 EXPORT_SYMBOL_GPL(typec_unregister_partner); 850 851 /* ------------------------------------------------------------------------- */ 852 /* Type-C Cable Plugs */ 853 854 static void typec_plug_release(struct device *dev) 855 { 856 struct typec_plug *plug = to_typec_plug(dev); 857 858 ida_destroy(&plug->mode_ids); 859 kfree(plug); 860 } 861 862 static struct attribute *typec_plug_attrs[] = { 863 &dev_attr_number_of_alternate_modes.attr, 864 NULL 865 }; 866 867 static umode_t typec_plug_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 868 { 869 struct typec_plug *plug = to_typec_plug(kobj_to_dev(kobj)); 870 871 if (attr == &dev_attr_number_of_alternate_modes.attr) { 872 if (plug->num_altmodes < 0) 873 return 0; 874 } 875 876 return attr->mode; 877 } 878 879 static const struct attribute_group typec_plug_group = { 880 .is_visible = typec_plug_attr_is_visible, 881 .attrs = typec_plug_attrs 882 }; 883 884 static const struct attribute_group *typec_plug_groups[] = { 885 &typec_plug_group, 886 NULL 887 }; 888 889 const struct device_type typec_plug_dev_type = { 890 .name = "typec_plug", 891 .groups = typec_plug_groups, 892 .release = typec_plug_release, 893 }; 894 895 /** 896 * typec_plug_set_num_altmodes - Set the number of available plug altmodes 897 * @plug: The plug to be updated. 898 * @num_altmodes: The number of altmodes we want to specify as available. 899 * 900 * This routine is used to report the number of alternate modes supported by the 901 * plug. This value is *not* enforced in alternate mode registration routines. 902 * 903 * @plug.num_altmodes is set to -1 on plug registration, denoting that 904 * a valid value has not been set for it yet. 905 * 906 * Returns 0 on success or negative error number on failure. 907 */ 908 int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes) 909 { 910 int ret; 911 912 if (num_altmodes < 0) 913 return -EINVAL; 914 915 plug->num_altmodes = num_altmodes; 916 ret = sysfs_update_group(&plug->dev.kobj, &typec_plug_group); 917 if (ret < 0) 918 return ret; 919 920 sysfs_notify(&plug->dev.kobj, NULL, "number_of_alternate_modes"); 921 kobject_uevent(&plug->dev.kobj, KOBJ_CHANGE); 922 923 return 0; 924 } 925 EXPORT_SYMBOL_GPL(typec_plug_set_num_altmodes); 926 927 /** 928 * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode 929 * @plug: USB Type-C Cable Plug that supports the alternate mode 930 * @desc: Description of the alternate mode 931 * 932 * This routine is used to register each alternate mode individually that @plug 933 * has listed in response to Discover SVIDs command. The modes for a SVID that 934 * the plug lists in response to Discover Modes command need to be listed in an 935 * array in @desc. 936 * 937 * Returns handle to the alternate mode on success or ERR_PTR on failure. 938 */ 939 struct typec_altmode * 940 typec_plug_register_altmode(struct typec_plug *plug, 941 const struct typec_altmode_desc *desc) 942 { 943 return typec_register_altmode(&plug->dev, desc); 944 } 945 EXPORT_SYMBOL_GPL(typec_plug_register_altmode); 946 947 /** 948 * typec_register_plug - Register a USB Type-C Cable Plug 949 * @cable: USB Type-C Cable with the plug 950 * @desc: Description of the cable plug 951 * 952 * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C 953 * Cable Plug represents a plug with electronics in it that can response to USB 954 * Power Delivery SOP Prime or SOP Double Prime packages. 955 * 956 * Returns handle to the cable plug on success or ERR_PTR on failure. 957 */ 958 struct typec_plug *typec_register_plug(struct typec_cable *cable, 959 struct typec_plug_desc *desc) 960 { 961 struct typec_plug *plug; 962 char name[8]; 963 int ret; 964 965 plug = kzalloc(sizeof(*plug), GFP_KERNEL); 966 if (!plug) 967 return ERR_PTR(-ENOMEM); 968 969 sprintf(name, "plug%d", desc->index); 970 971 ida_init(&plug->mode_ids); 972 plug->num_altmodes = -1; 973 plug->index = desc->index; 974 plug->dev.class = &typec_class; 975 plug->dev.parent = &cable->dev; 976 plug->dev.type = &typec_plug_dev_type; 977 dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name); 978 979 ret = device_register(&plug->dev); 980 if (ret) { 981 dev_err(&cable->dev, "failed to register plug (%d)\n", ret); 982 put_device(&plug->dev); 983 return ERR_PTR(ret); 984 } 985 986 return plug; 987 } 988 EXPORT_SYMBOL_GPL(typec_register_plug); 989 990 /** 991 * typec_unregister_plug - Unregister a USB Type-C Cable Plug 992 * @plug: The cable plug to be unregistered 993 * 994 * Unregister device created with typec_register_plug(). 995 */ 996 void typec_unregister_plug(struct typec_plug *plug) 997 { 998 if (!IS_ERR_OR_NULL(plug)) 999 device_unregister(&plug->dev); 1000 } 1001 EXPORT_SYMBOL_GPL(typec_unregister_plug); 1002 1003 /* Type-C Cables */ 1004 1005 static const char * const typec_plug_types[] = { 1006 [USB_PLUG_NONE] = "unknown", 1007 [USB_PLUG_TYPE_A] = "type-a", 1008 [USB_PLUG_TYPE_B] = "type-b", 1009 [USB_PLUG_TYPE_C] = "type-c", 1010 [USB_PLUG_CAPTIVE] = "captive", 1011 }; 1012 1013 static ssize_t plug_type_show(struct device *dev, 1014 struct device_attribute *attr, char *buf) 1015 { 1016 struct typec_cable *cable = to_typec_cable(dev); 1017 1018 return sprintf(buf, "%s\n", typec_plug_types[cable->type]); 1019 } 1020 static DEVICE_ATTR_RO(plug_type); 1021 1022 static struct attribute *typec_cable_attrs[] = { 1023 &dev_attr_type.attr, 1024 &dev_attr_plug_type.attr, 1025 &dev_attr_usb_power_delivery_revision.attr, 1026 NULL 1027 }; 1028 ATTRIBUTE_GROUPS(typec_cable); 1029 1030 static void typec_cable_release(struct device *dev) 1031 { 1032 struct typec_cable *cable = to_typec_cable(dev); 1033 1034 kfree(cable); 1035 } 1036 1037 const struct device_type typec_cable_dev_type = { 1038 .name = "typec_cable", 1039 .groups = typec_cable_groups, 1040 .release = typec_cable_release, 1041 }; 1042 1043 static int cable_match(struct device *dev, void *data) 1044 { 1045 return is_typec_cable(dev); 1046 } 1047 1048 /** 1049 * typec_cable_get - Get a reference to the USB Type-C cable 1050 * @port: The USB Type-C Port the cable is connected to 1051 * 1052 * The caller must decrement the reference count with typec_cable_put() after 1053 * use. 1054 */ 1055 struct typec_cable *typec_cable_get(struct typec_port *port) 1056 { 1057 struct device *dev; 1058 1059 dev = device_find_child(&port->dev, NULL, cable_match); 1060 if (!dev) 1061 return NULL; 1062 1063 return to_typec_cable(dev); 1064 } 1065 EXPORT_SYMBOL_GPL(typec_cable_get); 1066 1067 /** 1068 * typec_cable_put - Decrement the reference count on USB Type-C cable 1069 * @cable: The USB Type-C cable 1070 */ 1071 void typec_cable_put(struct typec_cable *cable) 1072 { 1073 put_device(&cable->dev); 1074 } 1075 EXPORT_SYMBOL_GPL(typec_cable_put); 1076 1077 /** 1078 * typec_cable_is_active - Check is the USB Type-C cable active or passive 1079 * @cable: The USB Type-C Cable 1080 * 1081 * Return 1 if the cable is active or 0 if it's passive. 1082 */ 1083 int typec_cable_is_active(struct typec_cable *cable) 1084 { 1085 return cable->active; 1086 } 1087 EXPORT_SYMBOL_GPL(typec_cable_is_active); 1088 1089 /** 1090 * typec_cable_set_identity - Report result from Discover Identity command 1091 * @cable: The cable updated identity values 1092 * 1093 * This routine is used to report that the result of Discover Identity USB power 1094 * delivery command has become available. 1095 */ 1096 int typec_cable_set_identity(struct typec_cable *cable) 1097 { 1098 if (!cable->identity) 1099 return -EINVAL; 1100 1101 typec_report_identity(&cable->dev); 1102 return 0; 1103 } 1104 EXPORT_SYMBOL_GPL(typec_cable_set_identity); 1105 1106 /** 1107 * typec_register_cable - Register a USB Type-C Cable 1108 * @port: The USB Type-C Port the cable is connected to 1109 * @desc: Description of the cable 1110 * 1111 * Registers a device for USB Type-C Cable described in @desc. The cable will be 1112 * parent for the optional cable plug devises. 1113 * 1114 * Returns handle to the cable on success or ERR_PTR on failure. 1115 */ 1116 struct typec_cable *typec_register_cable(struct typec_port *port, 1117 struct typec_cable_desc *desc) 1118 { 1119 struct typec_cable *cable; 1120 int ret; 1121 1122 cable = kzalloc(sizeof(*cable), GFP_KERNEL); 1123 if (!cable) 1124 return ERR_PTR(-ENOMEM); 1125 1126 cable->type = desc->type; 1127 cable->active = desc->active; 1128 cable->pd_revision = desc->pd_revision; 1129 1130 if (desc->identity) { 1131 /* 1132 * Creating directory for the identity only if the driver is 1133 * able to provide data to it. 1134 */ 1135 cable->dev.groups = usb_pd_id_groups; 1136 cable->identity = desc->identity; 1137 } 1138 1139 cable->dev.class = &typec_class; 1140 cable->dev.parent = &port->dev; 1141 cable->dev.type = &typec_cable_dev_type; 1142 dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev)); 1143 1144 ret = device_register(&cable->dev); 1145 if (ret) { 1146 dev_err(&port->dev, "failed to register cable (%d)\n", ret); 1147 put_device(&cable->dev); 1148 return ERR_PTR(ret); 1149 } 1150 1151 return cable; 1152 } 1153 EXPORT_SYMBOL_GPL(typec_register_cable); 1154 1155 /** 1156 * typec_unregister_cable - Unregister a USB Type-C Cable 1157 * @cable: The cable to be unregistered 1158 * 1159 * Unregister device created with typec_register_cable(). 1160 */ 1161 void typec_unregister_cable(struct typec_cable *cable) 1162 { 1163 if (!IS_ERR_OR_NULL(cable)) 1164 device_unregister(&cable->dev); 1165 } 1166 EXPORT_SYMBOL_GPL(typec_unregister_cable); 1167 1168 /* ------------------------------------------------------------------------- */ 1169 /* USB Type-C ports */ 1170 1171 static const char * const typec_orientations[] = { 1172 [TYPEC_ORIENTATION_NONE] = "unknown", 1173 [TYPEC_ORIENTATION_NORMAL] = "normal", 1174 [TYPEC_ORIENTATION_REVERSE] = "reverse", 1175 }; 1176 1177 static const char * const typec_roles[] = { 1178 [TYPEC_SINK] = "sink", 1179 [TYPEC_SOURCE] = "source", 1180 }; 1181 1182 static const char * const typec_data_roles[] = { 1183 [TYPEC_DEVICE] = "device", 1184 [TYPEC_HOST] = "host", 1185 }; 1186 1187 static const char * const typec_port_power_roles[] = { 1188 [TYPEC_PORT_SRC] = "source", 1189 [TYPEC_PORT_SNK] = "sink", 1190 [TYPEC_PORT_DRP] = "dual", 1191 }; 1192 1193 static const char * const typec_port_data_roles[] = { 1194 [TYPEC_PORT_DFP] = "host", 1195 [TYPEC_PORT_UFP] = "device", 1196 [TYPEC_PORT_DRD] = "dual", 1197 }; 1198 1199 static const char * const typec_port_types_drp[] = { 1200 [TYPEC_PORT_SRC] = "dual [source] sink", 1201 [TYPEC_PORT_SNK] = "dual source [sink]", 1202 [TYPEC_PORT_DRP] = "[dual] source sink", 1203 }; 1204 1205 static ssize_t 1206 preferred_role_store(struct device *dev, struct device_attribute *attr, 1207 const char *buf, size_t size) 1208 { 1209 struct typec_port *port = to_typec_port(dev); 1210 int role; 1211 int ret; 1212 1213 if (port->cap->type != TYPEC_PORT_DRP) { 1214 dev_dbg(dev, "Preferred role only supported with DRP ports\n"); 1215 return -EOPNOTSUPP; 1216 } 1217 1218 if (!port->ops || !port->ops->try_role) { 1219 dev_dbg(dev, "Setting preferred role not supported\n"); 1220 return -EOPNOTSUPP; 1221 } 1222 1223 role = sysfs_match_string(typec_roles, buf); 1224 if (role < 0) { 1225 if (sysfs_streq(buf, "none")) 1226 role = TYPEC_NO_PREFERRED_ROLE; 1227 else 1228 return -EINVAL; 1229 } 1230 1231 ret = port->ops->try_role(port, role); 1232 if (ret) 1233 return ret; 1234 1235 port->prefer_role = role; 1236 return size; 1237 } 1238 1239 static ssize_t 1240 preferred_role_show(struct device *dev, struct device_attribute *attr, 1241 char *buf) 1242 { 1243 struct typec_port *port = to_typec_port(dev); 1244 1245 if (port->cap->type != TYPEC_PORT_DRP) 1246 return 0; 1247 1248 if (port->prefer_role < 0) 1249 return 0; 1250 1251 return sprintf(buf, "%s\n", typec_roles[port->prefer_role]); 1252 } 1253 static DEVICE_ATTR_RW(preferred_role); 1254 1255 static ssize_t data_role_store(struct device *dev, 1256 struct device_attribute *attr, 1257 const char *buf, size_t size) 1258 { 1259 struct typec_port *port = to_typec_port(dev); 1260 int ret; 1261 1262 if (!port->ops || !port->ops->dr_set) { 1263 dev_dbg(dev, "data role swapping not supported\n"); 1264 return -EOPNOTSUPP; 1265 } 1266 1267 ret = sysfs_match_string(typec_data_roles, buf); 1268 if (ret < 0) 1269 return ret; 1270 1271 mutex_lock(&port->port_type_lock); 1272 if (port->cap->data != TYPEC_PORT_DRD) { 1273 ret = -EOPNOTSUPP; 1274 goto unlock_and_ret; 1275 } 1276 1277 ret = port->ops->dr_set(port, ret); 1278 if (ret) 1279 goto unlock_and_ret; 1280 1281 ret = size; 1282 unlock_and_ret: 1283 mutex_unlock(&port->port_type_lock); 1284 return ret; 1285 } 1286 1287 static ssize_t data_role_show(struct device *dev, 1288 struct device_attribute *attr, char *buf) 1289 { 1290 struct typec_port *port = to_typec_port(dev); 1291 1292 if (port->cap->data == TYPEC_PORT_DRD) 1293 return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ? 1294 "[host] device" : "host [device]"); 1295 1296 return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]); 1297 } 1298 static DEVICE_ATTR_RW(data_role); 1299 1300 static ssize_t power_role_store(struct device *dev, 1301 struct device_attribute *attr, 1302 const char *buf, size_t size) 1303 { 1304 struct typec_port *port = to_typec_port(dev); 1305 int ret; 1306 1307 if (!port->ops || !port->ops->pr_set) { 1308 dev_dbg(dev, "power role swapping not supported\n"); 1309 return -EOPNOTSUPP; 1310 } 1311 1312 if (port->pwr_opmode != TYPEC_PWR_MODE_PD) { 1313 dev_dbg(dev, "partner unable to swap power role\n"); 1314 return -EIO; 1315 } 1316 1317 ret = sysfs_match_string(typec_roles, buf); 1318 if (ret < 0) 1319 return ret; 1320 1321 mutex_lock(&port->port_type_lock); 1322 if (port->port_type != TYPEC_PORT_DRP) { 1323 dev_dbg(dev, "port type fixed at \"%s\"", 1324 typec_port_power_roles[port->port_type]); 1325 ret = -EOPNOTSUPP; 1326 goto unlock_and_ret; 1327 } 1328 1329 ret = port->ops->pr_set(port, ret); 1330 if (ret) 1331 goto unlock_and_ret; 1332 1333 ret = size; 1334 unlock_and_ret: 1335 mutex_unlock(&port->port_type_lock); 1336 return ret; 1337 } 1338 1339 static ssize_t power_role_show(struct device *dev, 1340 struct device_attribute *attr, char *buf) 1341 { 1342 struct typec_port *port = to_typec_port(dev); 1343 1344 if (port->cap->type == TYPEC_PORT_DRP) 1345 return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ? 1346 "[source] sink" : "source [sink]"); 1347 1348 return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]); 1349 } 1350 static DEVICE_ATTR_RW(power_role); 1351 1352 static ssize_t 1353 port_type_store(struct device *dev, struct device_attribute *attr, 1354 const char *buf, size_t size) 1355 { 1356 struct typec_port *port = to_typec_port(dev); 1357 int ret; 1358 enum typec_port_type type; 1359 1360 if (port->cap->type != TYPEC_PORT_DRP || 1361 !port->ops || !port->ops->port_type_set) { 1362 dev_dbg(dev, "changing port type not supported\n"); 1363 return -EOPNOTSUPP; 1364 } 1365 1366 ret = sysfs_match_string(typec_port_power_roles, buf); 1367 if (ret < 0) 1368 return ret; 1369 1370 type = ret; 1371 mutex_lock(&port->port_type_lock); 1372 1373 if (port->port_type == type) { 1374 ret = size; 1375 goto unlock_and_ret; 1376 } 1377 1378 ret = port->ops->port_type_set(port, type); 1379 if (ret) 1380 goto unlock_and_ret; 1381 1382 port->port_type = type; 1383 ret = size; 1384 1385 unlock_and_ret: 1386 mutex_unlock(&port->port_type_lock); 1387 return ret; 1388 } 1389 1390 static ssize_t 1391 port_type_show(struct device *dev, struct device_attribute *attr, 1392 char *buf) 1393 { 1394 struct typec_port *port = to_typec_port(dev); 1395 1396 if (port->cap->type == TYPEC_PORT_DRP) 1397 return sprintf(buf, "%s\n", 1398 typec_port_types_drp[port->port_type]); 1399 1400 return sprintf(buf, "[%s]\n", typec_port_power_roles[port->cap->type]); 1401 } 1402 static DEVICE_ATTR_RW(port_type); 1403 1404 static const char * const typec_pwr_opmodes[] = { 1405 [TYPEC_PWR_MODE_USB] = "default", 1406 [TYPEC_PWR_MODE_1_5A] = "1.5A", 1407 [TYPEC_PWR_MODE_3_0A] = "3.0A", 1408 [TYPEC_PWR_MODE_PD] = "usb_power_delivery", 1409 }; 1410 1411 static ssize_t power_operation_mode_show(struct device *dev, 1412 struct device_attribute *attr, 1413 char *buf) 1414 { 1415 struct typec_port *port = to_typec_port(dev); 1416 1417 return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]); 1418 } 1419 static DEVICE_ATTR_RO(power_operation_mode); 1420 1421 static ssize_t vconn_source_store(struct device *dev, 1422 struct device_attribute *attr, 1423 const char *buf, size_t size) 1424 { 1425 struct typec_port *port = to_typec_port(dev); 1426 bool source; 1427 int ret; 1428 1429 if (!port->cap->pd_revision) { 1430 dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n"); 1431 return -EOPNOTSUPP; 1432 } 1433 1434 if (!port->ops || !port->ops->vconn_set) { 1435 dev_dbg(dev, "VCONN swapping not supported\n"); 1436 return -EOPNOTSUPP; 1437 } 1438 1439 ret = kstrtobool(buf, &source); 1440 if (ret) 1441 return ret; 1442 1443 ret = port->ops->vconn_set(port, (enum typec_role)source); 1444 if (ret) 1445 return ret; 1446 1447 return size; 1448 } 1449 1450 static ssize_t vconn_source_show(struct device *dev, 1451 struct device_attribute *attr, char *buf) 1452 { 1453 struct typec_port *port = to_typec_port(dev); 1454 1455 return sprintf(buf, "%s\n", 1456 port->vconn_role == TYPEC_SOURCE ? "yes" : "no"); 1457 } 1458 static DEVICE_ATTR_RW(vconn_source); 1459 1460 static ssize_t supported_accessory_modes_show(struct device *dev, 1461 struct device_attribute *attr, 1462 char *buf) 1463 { 1464 struct typec_port *port = to_typec_port(dev); 1465 ssize_t ret = 0; 1466 int i; 1467 1468 for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) { 1469 if (port->cap->accessory[i]) 1470 ret += sprintf(buf + ret, "%s ", 1471 typec_accessory_modes[port->cap->accessory[i]]); 1472 } 1473 1474 if (!ret) 1475 return sprintf(buf, "none\n"); 1476 1477 buf[ret - 1] = '\n'; 1478 1479 return ret; 1480 } 1481 static DEVICE_ATTR_RO(supported_accessory_modes); 1482 1483 static ssize_t usb_typec_revision_show(struct device *dev, 1484 struct device_attribute *attr, 1485 char *buf) 1486 { 1487 struct typec_port *port = to_typec_port(dev); 1488 u16 rev = port->cap->revision; 1489 1490 return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1491 } 1492 static DEVICE_ATTR_RO(usb_typec_revision); 1493 1494 static ssize_t usb_power_delivery_revision_show(struct device *dev, 1495 struct device_attribute *attr, 1496 char *buf) 1497 { 1498 u16 rev = 0; 1499 1500 if (is_typec_partner(dev)) { 1501 struct typec_partner *partner = to_typec_partner(dev); 1502 1503 rev = partner->pd_revision; 1504 } else if (is_typec_cable(dev)) { 1505 struct typec_cable *cable = to_typec_cable(dev); 1506 1507 rev = cable->pd_revision; 1508 } else if (is_typec_port(dev)) { 1509 struct typec_port *p = to_typec_port(dev); 1510 1511 rev = p->cap->pd_revision; 1512 } 1513 return sysfs_emit(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1514 } 1515 1516 static ssize_t orientation_show(struct device *dev, 1517 struct device_attribute *attr, 1518 char *buf) 1519 { 1520 struct typec_port *port = to_typec_port(dev); 1521 1522 return sprintf(buf, "%s\n", typec_orientations[port->orientation]); 1523 } 1524 static DEVICE_ATTR_RO(orientation); 1525 1526 static struct attribute *typec_attrs[] = { 1527 &dev_attr_data_role.attr, 1528 &dev_attr_power_operation_mode.attr, 1529 &dev_attr_power_role.attr, 1530 &dev_attr_preferred_role.attr, 1531 &dev_attr_supported_accessory_modes.attr, 1532 &dev_attr_usb_power_delivery_revision.attr, 1533 &dev_attr_usb_typec_revision.attr, 1534 &dev_attr_vconn_source.attr, 1535 &dev_attr_port_type.attr, 1536 &dev_attr_orientation.attr, 1537 NULL, 1538 }; 1539 1540 static umode_t typec_attr_is_visible(struct kobject *kobj, 1541 struct attribute *attr, int n) 1542 { 1543 struct typec_port *port = to_typec_port(kobj_to_dev(kobj)); 1544 1545 if (attr == &dev_attr_data_role.attr) { 1546 if (port->cap->data != TYPEC_PORT_DRD || 1547 !port->ops || !port->ops->dr_set) 1548 return 0444; 1549 } else if (attr == &dev_attr_power_role.attr) { 1550 if (port->cap->type != TYPEC_PORT_DRP || 1551 !port->ops || !port->ops->pr_set) 1552 return 0444; 1553 } else if (attr == &dev_attr_vconn_source.attr) { 1554 if (!port->cap->pd_revision || 1555 !port->ops || !port->ops->vconn_set) 1556 return 0444; 1557 } else if (attr == &dev_attr_preferred_role.attr) { 1558 if (port->cap->type != TYPEC_PORT_DRP || 1559 !port->ops || !port->ops->try_role) 1560 return 0444; 1561 } else if (attr == &dev_attr_port_type.attr) { 1562 if (!port->ops || !port->ops->port_type_set) 1563 return 0; 1564 if (port->cap->type != TYPEC_PORT_DRP) 1565 return 0444; 1566 } else if (attr == &dev_attr_orientation.attr) { 1567 if (port->cap->orientation_aware) 1568 return 0444; 1569 return 0; 1570 } 1571 1572 return attr->mode; 1573 } 1574 1575 static const struct attribute_group typec_group = { 1576 .is_visible = typec_attr_is_visible, 1577 .attrs = typec_attrs, 1578 }; 1579 1580 static const struct attribute_group *typec_groups[] = { 1581 &typec_group, 1582 NULL 1583 }; 1584 1585 static int typec_uevent(struct device *dev, struct kobj_uevent_env *env) 1586 { 1587 int ret; 1588 1589 ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev)); 1590 if (ret) 1591 dev_err(dev, "failed to add uevent TYPEC_PORT\n"); 1592 1593 return ret; 1594 } 1595 1596 static void typec_release(struct device *dev) 1597 { 1598 struct typec_port *port = to_typec_port(dev); 1599 1600 ida_simple_remove(&typec_index_ida, port->id); 1601 ida_destroy(&port->mode_ids); 1602 typec_switch_put(port->sw); 1603 typec_mux_put(port->mux); 1604 kfree(port->cap); 1605 kfree(port); 1606 } 1607 1608 const struct device_type typec_port_dev_type = { 1609 .name = "typec_port", 1610 .groups = typec_groups, 1611 .uevent = typec_uevent, 1612 .release = typec_release, 1613 }; 1614 1615 /* --------------------------------------- */ 1616 /* Driver callbacks to report role updates */ 1617 1618 static int partner_match(struct device *dev, void *data) 1619 { 1620 return is_typec_partner(dev); 1621 } 1622 1623 /** 1624 * typec_set_data_role - Report data role change 1625 * @port: The USB Type-C Port where the role was changed 1626 * @role: The new data role 1627 * 1628 * This routine is used by the port drivers to report data role changes. 1629 */ 1630 void typec_set_data_role(struct typec_port *port, enum typec_data_role role) 1631 { 1632 struct device *partner_dev; 1633 1634 if (port->data_role == role) 1635 return; 1636 1637 port->data_role = role; 1638 sysfs_notify(&port->dev.kobj, NULL, "data_role"); 1639 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1640 1641 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1642 if (!partner_dev) 1643 return; 1644 1645 if (to_typec_partner(partner_dev)->identity) 1646 typec_product_type_notify(partner_dev); 1647 1648 put_device(partner_dev); 1649 } 1650 EXPORT_SYMBOL_GPL(typec_set_data_role); 1651 1652 /** 1653 * typec_set_pwr_role - Report power role change 1654 * @port: The USB Type-C Port where the role was changed 1655 * @role: The new data role 1656 * 1657 * This routine is used by the port drivers to report power role changes. 1658 */ 1659 void typec_set_pwr_role(struct typec_port *port, enum typec_role role) 1660 { 1661 if (port->pwr_role == role) 1662 return; 1663 1664 port->pwr_role = role; 1665 sysfs_notify(&port->dev.kobj, NULL, "power_role"); 1666 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1667 } 1668 EXPORT_SYMBOL_GPL(typec_set_pwr_role); 1669 1670 /** 1671 * typec_set_vconn_role - Report VCONN source change 1672 * @port: The USB Type-C Port which VCONN role changed 1673 * @role: Source when @port is sourcing VCONN, or Sink when it's not 1674 * 1675 * This routine is used by the port drivers to report if the VCONN source is 1676 * changes. 1677 */ 1678 void typec_set_vconn_role(struct typec_port *port, enum typec_role role) 1679 { 1680 if (port->vconn_role == role) 1681 return; 1682 1683 port->vconn_role = role; 1684 sysfs_notify(&port->dev.kobj, NULL, "vconn_source"); 1685 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1686 } 1687 EXPORT_SYMBOL_GPL(typec_set_vconn_role); 1688 1689 /** 1690 * typec_set_pwr_opmode - Report changed power operation mode 1691 * @port: The USB Type-C Port where the mode was changed 1692 * @opmode: New power operation mode 1693 * 1694 * This routine is used by the port drivers to report changed power operation 1695 * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB 1696 * Type-C specification, and "USB Power Delivery" when the power levels are 1697 * negotiated with methods defined in USB Power Delivery specification. 1698 */ 1699 void typec_set_pwr_opmode(struct typec_port *port, 1700 enum typec_pwr_opmode opmode) 1701 { 1702 struct device *partner_dev; 1703 1704 if (port->pwr_opmode == opmode) 1705 return; 1706 1707 port->pwr_opmode = opmode; 1708 sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode"); 1709 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1710 1711 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1712 if (partner_dev) { 1713 struct typec_partner *partner = to_typec_partner(partner_dev); 1714 1715 if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) { 1716 partner->usb_pd = 1; 1717 sysfs_notify(&partner_dev->kobj, NULL, 1718 "supports_usb_power_delivery"); 1719 } 1720 put_device(partner_dev); 1721 } 1722 } 1723 EXPORT_SYMBOL_GPL(typec_set_pwr_opmode); 1724 1725 /** 1726 * typec_find_pwr_opmode - Get the typec power operation mode capability 1727 * @name: power operation mode string 1728 * 1729 * This routine is used to find the typec_pwr_opmode by its string @name. 1730 * 1731 * Returns typec_pwr_opmode if success, otherwise negative error code. 1732 */ 1733 int typec_find_pwr_opmode(const char *name) 1734 { 1735 return match_string(typec_pwr_opmodes, 1736 ARRAY_SIZE(typec_pwr_opmodes), name); 1737 } 1738 EXPORT_SYMBOL_GPL(typec_find_pwr_opmode); 1739 1740 /** 1741 * typec_find_orientation - Convert orientation string to enum typec_orientation 1742 * @name: Orientation string 1743 * 1744 * This routine is used to find the typec_orientation by its string name @name. 1745 * 1746 * Returns the orientation value on success, otherwise negative error code. 1747 */ 1748 int typec_find_orientation(const char *name) 1749 { 1750 return match_string(typec_orientations, ARRAY_SIZE(typec_orientations), 1751 name); 1752 } 1753 EXPORT_SYMBOL_GPL(typec_find_orientation); 1754 1755 /** 1756 * typec_find_port_power_role - Get the typec port power capability 1757 * @name: port power capability string 1758 * 1759 * This routine is used to find the typec_port_type by its string name. 1760 * 1761 * Returns typec_port_type if success, otherwise negative error code. 1762 */ 1763 int typec_find_port_power_role(const char *name) 1764 { 1765 return match_string(typec_port_power_roles, 1766 ARRAY_SIZE(typec_port_power_roles), name); 1767 } 1768 EXPORT_SYMBOL_GPL(typec_find_port_power_role); 1769 1770 /** 1771 * typec_find_power_role - Find the typec one specific power role 1772 * @name: power role string 1773 * 1774 * This routine is used to find the typec_role by its string name. 1775 * 1776 * Returns typec_role if success, otherwise negative error code. 1777 */ 1778 int typec_find_power_role(const char *name) 1779 { 1780 return match_string(typec_roles, ARRAY_SIZE(typec_roles), name); 1781 } 1782 EXPORT_SYMBOL_GPL(typec_find_power_role); 1783 1784 /** 1785 * typec_find_port_data_role - Get the typec port data capability 1786 * @name: port data capability string 1787 * 1788 * This routine is used to find the typec_port_data by its string name. 1789 * 1790 * Returns typec_port_data if success, otherwise negative error code. 1791 */ 1792 int typec_find_port_data_role(const char *name) 1793 { 1794 return match_string(typec_port_data_roles, 1795 ARRAY_SIZE(typec_port_data_roles), name); 1796 } 1797 EXPORT_SYMBOL_GPL(typec_find_port_data_role); 1798 1799 /* ------------------------------------------ */ 1800 /* API for Multiplexer/DeMultiplexer Switches */ 1801 1802 /** 1803 * typec_set_orientation - Set USB Type-C cable plug orientation 1804 * @port: USB Type-C Port 1805 * @orientation: USB Type-C cable plug orientation 1806 * 1807 * Set cable plug orientation for @port. 1808 */ 1809 int typec_set_orientation(struct typec_port *port, 1810 enum typec_orientation orientation) 1811 { 1812 int ret; 1813 1814 ret = typec_switch_set(port->sw, orientation); 1815 if (ret) 1816 return ret; 1817 1818 port->orientation = orientation; 1819 sysfs_notify(&port->dev.kobj, NULL, "orientation"); 1820 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1821 1822 return 0; 1823 } 1824 EXPORT_SYMBOL_GPL(typec_set_orientation); 1825 1826 /** 1827 * typec_get_orientation - Get USB Type-C cable plug orientation 1828 * @port: USB Type-C Port 1829 * 1830 * Get current cable plug orientation for @port. 1831 */ 1832 enum typec_orientation typec_get_orientation(struct typec_port *port) 1833 { 1834 return port->orientation; 1835 } 1836 EXPORT_SYMBOL_GPL(typec_get_orientation); 1837 1838 /** 1839 * typec_set_mode - Set mode of operation for USB Type-C connector 1840 * @port: USB Type-C connector 1841 * @mode: Accessory Mode, USB Operation or Safe State 1842 * 1843 * Configure @port for Accessory Mode @mode. This function will configure the 1844 * muxes needed for @mode. 1845 */ 1846 int typec_set_mode(struct typec_port *port, int mode) 1847 { 1848 struct typec_mux_state state = { }; 1849 1850 state.mode = mode; 1851 1852 return typec_mux_set(port->mux, &state); 1853 } 1854 EXPORT_SYMBOL_GPL(typec_set_mode); 1855 1856 /* --------------------------------------- */ 1857 1858 /** 1859 * typec_get_negotiated_svdm_version - Get negotiated SVDM Version 1860 * @port: USB Type-C Port. 1861 * 1862 * Get the negotiated SVDM Version. The Version is set to the port default 1863 * value stored in typec_capability on partner registration, and updated after 1864 * a successful Discover Identity if the negotiated value is less than the 1865 * default value. 1866 * 1867 * Returns usb_pd_svdm_ver if the partner has been registered otherwise -ENODEV. 1868 */ 1869 int typec_get_negotiated_svdm_version(struct typec_port *port) 1870 { 1871 enum usb_pd_svdm_ver svdm_version; 1872 struct device *partner_dev; 1873 1874 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1875 if (!partner_dev) 1876 return -ENODEV; 1877 1878 svdm_version = to_typec_partner(partner_dev)->svdm_version; 1879 put_device(partner_dev); 1880 1881 return svdm_version; 1882 } 1883 EXPORT_SYMBOL_GPL(typec_get_negotiated_svdm_version); 1884 1885 /** 1886 * typec_get_drvdata - Return private driver data pointer 1887 * @port: USB Type-C port 1888 */ 1889 void *typec_get_drvdata(struct typec_port *port) 1890 { 1891 return dev_get_drvdata(&port->dev); 1892 } 1893 EXPORT_SYMBOL_GPL(typec_get_drvdata); 1894 1895 /** 1896 * typec_port_register_altmode - Register USB Type-C Port Alternate Mode 1897 * @port: USB Type-C Port that supports the alternate mode 1898 * @desc: Description of the alternate mode 1899 * 1900 * This routine is used to register an alternate mode that @port is capable of 1901 * supporting. 1902 * 1903 * Returns handle to the alternate mode on success or ERR_PTR on failure. 1904 */ 1905 struct typec_altmode * 1906 typec_port_register_altmode(struct typec_port *port, 1907 const struct typec_altmode_desc *desc) 1908 { 1909 struct typec_altmode *adev; 1910 struct typec_mux *mux; 1911 1912 mux = typec_mux_get(&port->dev, desc); 1913 if (IS_ERR(mux)) 1914 return ERR_CAST(mux); 1915 1916 adev = typec_register_altmode(&port->dev, desc); 1917 if (IS_ERR(adev)) 1918 typec_mux_put(mux); 1919 else 1920 to_altmode(adev)->mux = mux; 1921 1922 return adev; 1923 } 1924 EXPORT_SYMBOL_GPL(typec_port_register_altmode); 1925 1926 void typec_port_register_altmodes(struct typec_port *port, 1927 const struct typec_altmode_ops *ops, void *drvdata, 1928 struct typec_altmode **altmodes, size_t n) 1929 { 1930 struct fwnode_handle *altmodes_node, *child; 1931 struct typec_altmode_desc desc; 1932 struct typec_altmode *alt; 1933 size_t index = 0; 1934 u32 svid, vdo; 1935 int ret; 1936 1937 altmodes_node = device_get_named_child_node(&port->dev, "altmodes"); 1938 if (!altmodes_node) 1939 return; /* No altmodes specified */ 1940 1941 fwnode_for_each_child_node(altmodes_node, child) { 1942 ret = fwnode_property_read_u32(child, "svid", &svid); 1943 if (ret) { 1944 dev_err(&port->dev, "Error reading svid for altmode %s\n", 1945 fwnode_get_name(child)); 1946 continue; 1947 } 1948 1949 ret = fwnode_property_read_u32(child, "vdo", &vdo); 1950 if (ret) { 1951 dev_err(&port->dev, "Error reading vdo for altmode %s\n", 1952 fwnode_get_name(child)); 1953 continue; 1954 } 1955 1956 if (index >= n) { 1957 dev_err(&port->dev, "Error not enough space for altmode %s\n", 1958 fwnode_get_name(child)); 1959 continue; 1960 } 1961 1962 desc.svid = svid; 1963 desc.vdo = vdo; 1964 desc.mode = index + 1; 1965 alt = typec_port_register_altmode(port, &desc); 1966 if (IS_ERR(alt)) { 1967 dev_err(&port->dev, "Error registering altmode %s\n", 1968 fwnode_get_name(child)); 1969 continue; 1970 } 1971 1972 alt->ops = ops; 1973 typec_altmode_set_drvdata(alt, drvdata); 1974 altmodes[index] = alt; 1975 index++; 1976 } 1977 } 1978 EXPORT_SYMBOL_GPL(typec_port_register_altmodes); 1979 1980 /** 1981 * typec_register_port - Register a USB Type-C Port 1982 * @parent: Parent device 1983 * @cap: Description of the port 1984 * 1985 * Registers a device for USB Type-C Port described in @cap. 1986 * 1987 * Returns handle to the port on success or ERR_PTR on failure. 1988 */ 1989 struct typec_port *typec_register_port(struct device *parent, 1990 const struct typec_capability *cap) 1991 { 1992 struct typec_port *port; 1993 int ret; 1994 int id; 1995 1996 port = kzalloc(sizeof(*port), GFP_KERNEL); 1997 if (!port) 1998 return ERR_PTR(-ENOMEM); 1999 2000 id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL); 2001 if (id < 0) { 2002 kfree(port); 2003 return ERR_PTR(id); 2004 } 2005 2006 switch (cap->type) { 2007 case TYPEC_PORT_SRC: 2008 port->pwr_role = TYPEC_SOURCE; 2009 port->vconn_role = TYPEC_SOURCE; 2010 break; 2011 case TYPEC_PORT_SNK: 2012 port->pwr_role = TYPEC_SINK; 2013 port->vconn_role = TYPEC_SINK; 2014 break; 2015 case TYPEC_PORT_DRP: 2016 if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE) 2017 port->pwr_role = cap->prefer_role; 2018 else 2019 port->pwr_role = TYPEC_SINK; 2020 break; 2021 } 2022 2023 switch (cap->data) { 2024 case TYPEC_PORT_DFP: 2025 port->data_role = TYPEC_HOST; 2026 break; 2027 case TYPEC_PORT_UFP: 2028 port->data_role = TYPEC_DEVICE; 2029 break; 2030 case TYPEC_PORT_DRD: 2031 if (cap->prefer_role == TYPEC_SOURCE) 2032 port->data_role = TYPEC_HOST; 2033 else 2034 port->data_role = TYPEC_DEVICE; 2035 break; 2036 } 2037 2038 ida_init(&port->mode_ids); 2039 mutex_init(&port->port_type_lock); 2040 mutex_init(&port->port_list_lock); 2041 INIT_LIST_HEAD(&port->port_list); 2042 2043 port->id = id; 2044 port->ops = cap->ops; 2045 port->port_type = cap->type; 2046 port->prefer_role = cap->prefer_role; 2047 2048 device_initialize(&port->dev); 2049 port->dev.class = &typec_class; 2050 port->dev.parent = parent; 2051 port->dev.fwnode = cap->fwnode; 2052 port->dev.type = &typec_port_dev_type; 2053 dev_set_name(&port->dev, "port%d", id); 2054 dev_set_drvdata(&port->dev, cap->driver_data); 2055 2056 port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL); 2057 if (!port->cap) { 2058 put_device(&port->dev); 2059 return ERR_PTR(-ENOMEM); 2060 } 2061 2062 port->sw = typec_switch_get(&port->dev); 2063 if (IS_ERR(port->sw)) { 2064 ret = PTR_ERR(port->sw); 2065 put_device(&port->dev); 2066 return ERR_PTR(ret); 2067 } 2068 2069 port->mux = typec_mux_get(&port->dev, NULL); 2070 if (IS_ERR(port->mux)) { 2071 ret = PTR_ERR(port->mux); 2072 put_device(&port->dev); 2073 return ERR_PTR(ret); 2074 } 2075 2076 ret = device_add(&port->dev); 2077 if (ret) { 2078 dev_err(parent, "failed to register port (%d)\n", ret); 2079 put_device(&port->dev); 2080 return ERR_PTR(ret); 2081 } 2082 2083 ret = typec_link_ports(port); 2084 if (ret) 2085 dev_warn(&port->dev, "failed to create symlinks (%d)\n", ret); 2086 2087 return port; 2088 } 2089 EXPORT_SYMBOL_GPL(typec_register_port); 2090 2091 /** 2092 * typec_unregister_port - Unregister a USB Type-C Port 2093 * @port: The port to be unregistered 2094 * 2095 * Unregister device created with typec_register_port(). 2096 */ 2097 void typec_unregister_port(struct typec_port *port) 2098 { 2099 if (!IS_ERR_OR_NULL(port)) { 2100 typec_unlink_ports(port); 2101 device_unregister(&port->dev); 2102 } 2103 } 2104 EXPORT_SYMBOL_GPL(typec_unregister_port); 2105 2106 static int __init typec_init(void) 2107 { 2108 int ret; 2109 2110 ret = bus_register(&typec_bus); 2111 if (ret) 2112 return ret; 2113 2114 ret = class_register(&typec_mux_class); 2115 if (ret) 2116 goto err_unregister_bus; 2117 2118 ret = class_register(&typec_class); 2119 if (ret) 2120 goto err_unregister_mux_class; 2121 2122 return 0; 2123 2124 err_unregister_mux_class: 2125 class_unregister(&typec_mux_class); 2126 2127 err_unregister_bus: 2128 bus_unregister(&typec_bus); 2129 2130 return ret; 2131 } 2132 subsys_initcall(typec_init); 2133 2134 static void __exit typec_exit(void) 2135 { 2136 class_unregister(&typec_class); 2137 ida_destroy(&typec_index_ida); 2138 bus_unregister(&typec_bus); 2139 class_unregister(&typec_mux_class); 2140 } 2141 module_exit(typec_exit); 2142 2143 MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>"); 2144 MODULE_LICENSE("GPL v2"); 2145 MODULE_DESCRIPTION("USB Type-C Connector Class"); 2146