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/device.h> 10 #include <linux/module.h> 11 #include <linux/mutex.h> 12 #include <linux/property.h> 13 #include <linux/slab.h> 14 #include <linux/usb/pd_vdo.h> 15 16 #include "bus.h" 17 18 struct typec_plug { 19 struct device dev; 20 enum typec_plug_index index; 21 struct ida mode_ids; 22 int num_altmodes; 23 }; 24 25 struct typec_cable { 26 struct device dev; 27 enum typec_plug_type type; 28 struct usb_pd_identity *identity; 29 unsigned int active:1; 30 u16 pd_revision; /* 0300H = "3.0" */ 31 }; 32 33 struct typec_partner { 34 struct device dev; 35 unsigned int usb_pd:1; 36 struct usb_pd_identity *identity; 37 enum typec_accessory accessory; 38 struct ida mode_ids; 39 int num_altmodes; 40 u16 pd_revision; /* 0300H = "3.0" */ 41 enum usb_pd_svdm_ver svdm_version; 42 }; 43 44 struct typec_port { 45 unsigned int id; 46 struct device dev; 47 struct ida mode_ids; 48 49 int prefer_role; 50 enum typec_data_role data_role; 51 enum typec_role pwr_role; 52 enum typec_role vconn_role; 53 enum typec_pwr_opmode pwr_opmode; 54 enum typec_port_type port_type; 55 struct mutex port_type_lock; 56 57 enum typec_orientation orientation; 58 struct typec_switch *sw; 59 struct typec_mux *mux; 60 61 const struct typec_capability *cap; 62 const struct typec_operations *ops; 63 }; 64 65 #define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev) 66 #define to_typec_plug(_dev_) container_of(_dev_, struct typec_plug, dev) 67 #define to_typec_cable(_dev_) container_of(_dev_, struct typec_cable, dev) 68 #define to_typec_partner(_dev_) container_of(_dev_, struct typec_partner, dev) 69 70 static const struct device_type typec_partner_dev_type; 71 static const struct device_type typec_cable_dev_type; 72 static const struct device_type typec_plug_dev_type; 73 74 #define is_typec_partner(_dev_) (_dev_->type == &typec_partner_dev_type) 75 #define is_typec_cable(_dev_) (_dev_->type == &typec_cable_dev_type) 76 #define is_typec_plug(_dev_) (_dev_->type == &typec_plug_dev_type) 77 78 static DEFINE_IDA(typec_index_ida); 79 static struct class *typec_class; 80 81 /* ------------------------------------------------------------------------- */ 82 /* Common attributes */ 83 84 static const char * const typec_accessory_modes[] = { 85 [TYPEC_ACCESSORY_NONE] = "none", 86 [TYPEC_ACCESSORY_AUDIO] = "analog_audio", 87 [TYPEC_ACCESSORY_DEBUG] = "debug", 88 }; 89 90 /* Product types defined in USB PD Specification R3.0 V2.0 */ 91 static const char * const product_type_ufp[8] = { 92 [IDH_PTYPE_NOT_UFP] = "not_ufp", 93 [IDH_PTYPE_HUB] = "hub", 94 [IDH_PTYPE_PERIPH] = "peripheral", 95 [IDH_PTYPE_PSD] = "psd", 96 [IDH_PTYPE_AMA] = "ama", 97 }; 98 99 static const char * const product_type_dfp[8] = { 100 [IDH_PTYPE_NOT_DFP] = "not_dfp", 101 [IDH_PTYPE_DFP_HUB] = "hub", 102 [IDH_PTYPE_DFP_HOST] = "host", 103 [IDH_PTYPE_DFP_PB] = "power_brick", 104 }; 105 106 static const char * const product_type_cable[8] = { 107 [IDH_PTYPE_NOT_CABLE] = "not_cable", 108 [IDH_PTYPE_PCABLE] = "passive", 109 [IDH_PTYPE_ACABLE] = "active", 110 [IDH_PTYPE_VPD] = "vpd", 111 }; 112 113 static struct usb_pd_identity *get_pd_identity(struct device *dev) 114 { 115 if (is_typec_partner(dev)) { 116 struct typec_partner *partner = to_typec_partner(dev); 117 118 return partner->identity; 119 } else if (is_typec_cable(dev)) { 120 struct typec_cable *cable = to_typec_cable(dev); 121 122 return cable->identity; 123 } 124 return NULL; 125 } 126 127 static const char *get_pd_product_type(struct device *dev) 128 { 129 struct typec_port *port = to_typec_port(dev->parent); 130 struct usb_pd_identity *id = get_pd_identity(dev); 131 const char *ptype = NULL; 132 133 if (is_typec_partner(dev)) { 134 if (!id) 135 return NULL; 136 137 if (port->data_role == TYPEC_HOST) 138 ptype = product_type_ufp[PD_IDH_PTYPE(id->id_header)]; 139 else 140 ptype = product_type_dfp[PD_IDH_DFP_PTYPE(id->id_header)]; 141 } else if (is_typec_cable(dev)) { 142 if (id) 143 ptype = product_type_cable[PD_IDH_PTYPE(id->id_header)]; 144 else 145 ptype = to_typec_cable(dev)->active ? 146 product_type_cable[IDH_PTYPE_ACABLE] : 147 product_type_cable[IDH_PTYPE_PCABLE]; 148 } 149 150 return ptype; 151 } 152 153 static ssize_t id_header_show(struct device *dev, struct device_attribute *attr, 154 char *buf) 155 { 156 struct usb_pd_identity *id = get_pd_identity(dev); 157 158 return sprintf(buf, "0x%08x\n", id->id_header); 159 } 160 static DEVICE_ATTR_RO(id_header); 161 162 static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr, 163 char *buf) 164 { 165 struct usb_pd_identity *id = get_pd_identity(dev); 166 167 return sprintf(buf, "0x%08x\n", id->cert_stat); 168 } 169 static DEVICE_ATTR_RO(cert_stat); 170 171 static ssize_t product_show(struct device *dev, struct device_attribute *attr, 172 char *buf) 173 { 174 struct usb_pd_identity *id = get_pd_identity(dev); 175 176 return sprintf(buf, "0x%08x\n", id->product); 177 } 178 static DEVICE_ATTR_RO(product); 179 180 static ssize_t product_type_vdo1_show(struct device *dev, struct device_attribute *attr, 181 char *buf) 182 { 183 struct usb_pd_identity *id = get_pd_identity(dev); 184 185 return sysfs_emit(buf, "0x%08x\n", id->vdo[0]); 186 } 187 static DEVICE_ATTR_RO(product_type_vdo1); 188 189 static ssize_t product_type_vdo2_show(struct device *dev, struct device_attribute *attr, 190 char *buf) 191 { 192 struct usb_pd_identity *id = get_pd_identity(dev); 193 194 return sysfs_emit(buf, "0x%08x\n", id->vdo[1]); 195 } 196 static DEVICE_ATTR_RO(product_type_vdo2); 197 198 static ssize_t product_type_vdo3_show(struct device *dev, struct device_attribute *attr, 199 char *buf) 200 { 201 struct usb_pd_identity *id = get_pd_identity(dev); 202 203 return sysfs_emit(buf, "0x%08x\n", id->vdo[2]); 204 } 205 static DEVICE_ATTR_RO(product_type_vdo3); 206 207 static struct attribute *usb_pd_id_attrs[] = { 208 &dev_attr_id_header.attr, 209 &dev_attr_cert_stat.attr, 210 &dev_attr_product.attr, 211 &dev_attr_product_type_vdo1.attr, 212 &dev_attr_product_type_vdo2.attr, 213 &dev_attr_product_type_vdo3.attr, 214 NULL 215 }; 216 217 static const struct attribute_group usb_pd_id_group = { 218 .name = "identity", 219 .attrs = usb_pd_id_attrs, 220 }; 221 222 static const struct attribute_group *usb_pd_id_groups[] = { 223 &usb_pd_id_group, 224 NULL, 225 }; 226 227 static void typec_product_type_notify(struct device *dev) 228 { 229 char *envp[2] = { }; 230 const char *ptype; 231 232 ptype = get_pd_product_type(dev); 233 if (!ptype) 234 return; 235 236 sysfs_notify(&dev->kobj, NULL, "type"); 237 238 envp[0] = kasprintf(GFP_KERNEL, "PRODUCT_TYPE=%s", ptype); 239 if (!envp[0]) 240 return; 241 242 kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 243 kfree(envp[0]); 244 } 245 246 static void typec_report_identity(struct device *dev) 247 { 248 sysfs_notify(&dev->kobj, "identity", "id_header"); 249 sysfs_notify(&dev->kobj, "identity", "cert_stat"); 250 sysfs_notify(&dev->kobj, "identity", "product"); 251 sysfs_notify(&dev->kobj, "identity", "product_type_vdo1"); 252 sysfs_notify(&dev->kobj, "identity", "product_type_vdo2"); 253 sysfs_notify(&dev->kobj, "identity", "product_type_vdo3"); 254 typec_product_type_notify(dev); 255 } 256 257 static ssize_t 258 type_show(struct device *dev, struct device_attribute *attr, char *buf) 259 { 260 const char *ptype; 261 262 ptype = get_pd_product_type(dev); 263 if (!ptype) 264 return 0; 265 266 return sysfs_emit(buf, "%s\n", ptype); 267 } 268 static DEVICE_ATTR_RO(type); 269 270 static ssize_t usb_power_delivery_revision_show(struct device *dev, 271 struct device_attribute *attr, 272 char *buf); 273 static DEVICE_ATTR_RO(usb_power_delivery_revision); 274 275 /* ------------------------------------------------------------------------- */ 276 /* Alternate Modes */ 277 278 static int altmode_match(struct device *dev, void *data) 279 { 280 struct typec_altmode *adev = to_typec_altmode(dev); 281 struct typec_device_id *id = data; 282 283 if (!is_typec_altmode(dev)) 284 return 0; 285 286 return ((adev->svid == id->svid) && (adev->mode == id->mode)); 287 } 288 289 static void typec_altmode_set_partner(struct altmode *altmode) 290 { 291 struct typec_altmode *adev = &altmode->adev; 292 struct typec_device_id id = { adev->svid, adev->mode, }; 293 struct typec_port *port = typec_altmode2port(adev); 294 struct altmode *partner; 295 struct device *dev; 296 297 dev = device_find_child(&port->dev, &id, altmode_match); 298 if (!dev) 299 return; 300 301 /* Bind the port alt mode to the partner/plug alt mode. */ 302 partner = to_altmode(to_typec_altmode(dev)); 303 altmode->partner = partner; 304 305 /* Bind the partner/plug alt mode to the port alt mode. */ 306 if (is_typec_plug(adev->dev.parent)) { 307 struct typec_plug *plug = to_typec_plug(adev->dev.parent); 308 309 partner->plug[plug->index] = altmode; 310 } else { 311 partner->partner = altmode; 312 } 313 } 314 315 static void typec_altmode_put_partner(struct altmode *altmode) 316 { 317 struct altmode *partner = altmode->partner; 318 struct typec_altmode *adev; 319 320 if (!partner) 321 return; 322 323 adev = &partner->adev; 324 325 if (is_typec_plug(adev->dev.parent)) { 326 struct typec_plug *plug = to_typec_plug(adev->dev.parent); 327 328 partner->plug[plug->index] = NULL; 329 } else { 330 partner->partner = NULL; 331 } 332 put_device(&adev->dev); 333 } 334 335 /** 336 * typec_altmode_update_active - Report Enter/Exit mode 337 * @adev: Handle to the alternate mode 338 * @active: True when the mode has been entered 339 * 340 * If a partner or cable plug executes Enter/Exit Mode command successfully, the 341 * drivers use this routine to report the updated state of the mode. 342 */ 343 void typec_altmode_update_active(struct typec_altmode *adev, bool active) 344 { 345 char dir[6]; 346 347 if (adev->active == active) 348 return; 349 350 if (!is_typec_port(adev->dev.parent) && adev->dev.driver) { 351 if (!active) 352 module_put(adev->dev.driver->owner); 353 else 354 WARN_ON(!try_module_get(adev->dev.driver->owner)); 355 } 356 357 adev->active = active; 358 snprintf(dir, sizeof(dir), "mode%d", adev->mode); 359 sysfs_notify(&adev->dev.kobj, dir, "active"); 360 sysfs_notify(&adev->dev.kobj, NULL, "active"); 361 kobject_uevent(&adev->dev.kobj, KOBJ_CHANGE); 362 } 363 EXPORT_SYMBOL_GPL(typec_altmode_update_active); 364 365 /** 366 * typec_altmode2port - Alternate Mode to USB Type-C port 367 * @alt: The Alternate Mode 368 * 369 * Returns handle to the port that a cable plug or partner with @alt is 370 * connected to. 371 */ 372 struct typec_port *typec_altmode2port(struct typec_altmode *alt) 373 { 374 if (is_typec_plug(alt->dev.parent)) 375 return to_typec_port(alt->dev.parent->parent->parent); 376 if (is_typec_partner(alt->dev.parent)) 377 return to_typec_port(alt->dev.parent->parent); 378 if (is_typec_port(alt->dev.parent)) 379 return to_typec_port(alt->dev.parent); 380 381 return NULL; 382 } 383 EXPORT_SYMBOL_GPL(typec_altmode2port); 384 385 static ssize_t 386 vdo_show(struct device *dev, struct device_attribute *attr, char *buf) 387 { 388 struct typec_altmode *alt = to_typec_altmode(dev); 389 390 return sprintf(buf, "0x%08x\n", alt->vdo); 391 } 392 static DEVICE_ATTR_RO(vdo); 393 394 static ssize_t 395 description_show(struct device *dev, struct device_attribute *attr, char *buf) 396 { 397 struct typec_altmode *alt = to_typec_altmode(dev); 398 399 return sprintf(buf, "%s\n", alt->desc ? alt->desc : ""); 400 } 401 static DEVICE_ATTR_RO(description); 402 403 static ssize_t 404 active_show(struct device *dev, struct device_attribute *attr, char *buf) 405 { 406 struct typec_altmode *alt = to_typec_altmode(dev); 407 408 return sprintf(buf, "%s\n", alt->active ? "yes" : "no"); 409 } 410 411 static ssize_t active_store(struct device *dev, struct device_attribute *attr, 412 const char *buf, size_t size) 413 { 414 struct typec_altmode *adev = to_typec_altmode(dev); 415 struct altmode *altmode = to_altmode(adev); 416 bool enter; 417 int ret; 418 419 ret = kstrtobool(buf, &enter); 420 if (ret) 421 return ret; 422 423 if (adev->active == enter) 424 return size; 425 426 if (is_typec_port(adev->dev.parent)) { 427 typec_altmode_update_active(adev, enter); 428 429 /* Make sure that the partner exits the mode before disabling */ 430 if (altmode->partner && !enter && altmode->partner->adev.active) 431 typec_altmode_exit(&altmode->partner->adev); 432 } else if (altmode->partner) { 433 if (enter && !altmode->partner->adev.active) { 434 dev_warn(dev, "port has the mode disabled\n"); 435 return -EPERM; 436 } 437 } 438 439 /* Note: If there is no driver, the mode will not be entered */ 440 if (adev->ops && adev->ops->activate) { 441 ret = adev->ops->activate(adev, enter); 442 if (ret) 443 return ret; 444 } 445 446 return size; 447 } 448 static DEVICE_ATTR_RW(active); 449 450 static ssize_t 451 supported_roles_show(struct device *dev, struct device_attribute *attr, 452 char *buf) 453 { 454 struct altmode *alt = to_altmode(to_typec_altmode(dev)); 455 ssize_t ret; 456 457 switch (alt->roles) { 458 case TYPEC_PORT_SRC: 459 ret = sprintf(buf, "source\n"); 460 break; 461 case TYPEC_PORT_SNK: 462 ret = sprintf(buf, "sink\n"); 463 break; 464 case TYPEC_PORT_DRP: 465 default: 466 ret = sprintf(buf, "source sink\n"); 467 break; 468 } 469 return ret; 470 } 471 static DEVICE_ATTR_RO(supported_roles); 472 473 static ssize_t 474 mode_show(struct device *dev, struct device_attribute *attr, char *buf) 475 { 476 struct typec_altmode *adev = to_typec_altmode(dev); 477 478 return sprintf(buf, "%u\n", adev->mode); 479 } 480 static DEVICE_ATTR_RO(mode); 481 482 static ssize_t 483 svid_show(struct device *dev, struct device_attribute *attr, char *buf) 484 { 485 struct typec_altmode *adev = to_typec_altmode(dev); 486 487 return sprintf(buf, "%04x\n", adev->svid); 488 } 489 static DEVICE_ATTR_RO(svid); 490 491 static struct attribute *typec_altmode_attrs[] = { 492 &dev_attr_active.attr, 493 &dev_attr_mode.attr, 494 &dev_attr_svid.attr, 495 &dev_attr_vdo.attr, 496 NULL 497 }; 498 499 static umode_t typec_altmode_attr_is_visible(struct kobject *kobj, 500 struct attribute *attr, int n) 501 { 502 struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj)); 503 504 if (attr == &dev_attr_active.attr) 505 if (!adev->ops || !adev->ops->activate) 506 return 0444; 507 508 return attr->mode; 509 } 510 511 static const struct attribute_group typec_altmode_group = { 512 .is_visible = typec_altmode_attr_is_visible, 513 .attrs = typec_altmode_attrs, 514 }; 515 516 static const struct attribute_group *typec_altmode_groups[] = { 517 &typec_altmode_group, 518 NULL 519 }; 520 521 static int altmode_id_get(struct device *dev) 522 { 523 struct ida *ids; 524 525 if (is_typec_partner(dev)) 526 ids = &to_typec_partner(dev)->mode_ids; 527 else if (is_typec_plug(dev)) 528 ids = &to_typec_plug(dev)->mode_ids; 529 else 530 ids = &to_typec_port(dev)->mode_ids; 531 532 return ida_simple_get(ids, 0, 0, GFP_KERNEL); 533 } 534 535 static void altmode_id_remove(struct device *dev, int id) 536 { 537 struct ida *ids; 538 539 if (is_typec_partner(dev)) 540 ids = &to_typec_partner(dev)->mode_ids; 541 else if (is_typec_plug(dev)) 542 ids = &to_typec_plug(dev)->mode_ids; 543 else 544 ids = &to_typec_port(dev)->mode_ids; 545 546 ida_simple_remove(ids, id); 547 } 548 549 static void typec_altmode_release(struct device *dev) 550 { 551 struct altmode *alt = to_altmode(to_typec_altmode(dev)); 552 553 typec_altmode_put_partner(alt); 554 555 altmode_id_remove(alt->adev.dev.parent, alt->id); 556 kfree(alt); 557 } 558 559 const struct device_type typec_altmode_dev_type = { 560 .name = "typec_alternate_mode", 561 .groups = typec_altmode_groups, 562 .release = typec_altmode_release, 563 }; 564 565 static struct typec_altmode * 566 typec_register_altmode(struct device *parent, 567 const struct typec_altmode_desc *desc) 568 { 569 unsigned int id = altmode_id_get(parent); 570 bool is_port = is_typec_port(parent); 571 struct altmode *alt; 572 int ret; 573 574 alt = kzalloc(sizeof(*alt), GFP_KERNEL); 575 if (!alt) 576 return ERR_PTR(-ENOMEM); 577 578 alt->adev.svid = desc->svid; 579 alt->adev.mode = desc->mode; 580 alt->adev.vdo = desc->vdo; 581 alt->roles = desc->roles; 582 alt->id = id; 583 584 alt->attrs[0] = &dev_attr_vdo.attr; 585 alt->attrs[1] = &dev_attr_description.attr; 586 alt->attrs[2] = &dev_attr_active.attr; 587 588 if (is_port) { 589 alt->attrs[3] = &dev_attr_supported_roles.attr; 590 alt->adev.active = true; /* Enabled by default */ 591 } 592 593 sprintf(alt->group_name, "mode%d", desc->mode); 594 alt->group.name = alt->group_name; 595 alt->group.attrs = alt->attrs; 596 alt->groups[0] = &alt->group; 597 598 alt->adev.dev.parent = parent; 599 alt->adev.dev.groups = alt->groups; 600 alt->adev.dev.type = &typec_altmode_dev_type; 601 dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id); 602 603 /* Link partners and plugs with the ports */ 604 if (!is_port) 605 typec_altmode_set_partner(alt); 606 607 /* The partners are bind to drivers */ 608 if (is_typec_partner(parent)) 609 alt->adev.dev.bus = &typec_bus; 610 611 /* Plug alt modes need a class to generate udev events. */ 612 if (is_typec_plug(parent)) 613 alt->adev.dev.class = typec_class; 614 615 ret = device_register(&alt->adev.dev); 616 if (ret) { 617 dev_err(parent, "failed to register alternate mode (%d)\n", 618 ret); 619 put_device(&alt->adev.dev); 620 return ERR_PTR(ret); 621 } 622 623 return &alt->adev; 624 } 625 626 /** 627 * typec_unregister_altmode - Unregister Alternate Mode 628 * @adev: The alternate mode to be unregistered 629 * 630 * Unregister device created with typec_partner_register_altmode(), 631 * typec_plug_register_altmode() or typec_port_register_altmode(). 632 */ 633 void typec_unregister_altmode(struct typec_altmode *adev) 634 { 635 if (IS_ERR_OR_NULL(adev)) 636 return; 637 typec_mux_put(to_altmode(adev)->mux); 638 device_unregister(&adev->dev); 639 } 640 EXPORT_SYMBOL_GPL(typec_unregister_altmode); 641 642 /* ------------------------------------------------------------------------- */ 643 /* Type-C Partners */ 644 645 static ssize_t accessory_mode_show(struct device *dev, 646 struct device_attribute *attr, 647 char *buf) 648 { 649 struct typec_partner *p = to_typec_partner(dev); 650 651 return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]); 652 } 653 static DEVICE_ATTR_RO(accessory_mode); 654 655 static ssize_t supports_usb_power_delivery_show(struct device *dev, 656 struct device_attribute *attr, 657 char *buf) 658 { 659 struct typec_partner *p = to_typec_partner(dev); 660 661 return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no"); 662 } 663 static DEVICE_ATTR_RO(supports_usb_power_delivery); 664 665 static ssize_t number_of_alternate_modes_show(struct device *dev, struct device_attribute *attr, 666 char *buf) 667 { 668 struct typec_partner *partner; 669 struct typec_plug *plug; 670 int num_altmodes; 671 672 if (is_typec_partner(dev)) { 673 partner = to_typec_partner(dev); 674 num_altmodes = partner->num_altmodes; 675 } else if (is_typec_plug(dev)) { 676 plug = to_typec_plug(dev); 677 num_altmodes = plug->num_altmodes; 678 } else { 679 return 0; 680 } 681 682 return sysfs_emit(buf, "%d\n", num_altmodes); 683 } 684 static DEVICE_ATTR_RO(number_of_alternate_modes); 685 686 static struct attribute *typec_partner_attrs[] = { 687 &dev_attr_accessory_mode.attr, 688 &dev_attr_supports_usb_power_delivery.attr, 689 &dev_attr_number_of_alternate_modes.attr, 690 &dev_attr_type.attr, 691 &dev_attr_usb_power_delivery_revision.attr, 692 NULL 693 }; 694 695 static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 696 { 697 struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj)); 698 699 if (attr == &dev_attr_number_of_alternate_modes.attr) { 700 if (partner->num_altmodes < 0) 701 return 0; 702 } 703 704 if (attr == &dev_attr_type.attr) 705 if (!get_pd_product_type(kobj_to_dev(kobj))) 706 return 0; 707 708 return attr->mode; 709 } 710 711 static const struct attribute_group typec_partner_group = { 712 .is_visible = typec_partner_attr_is_visible, 713 .attrs = typec_partner_attrs 714 }; 715 716 static const struct attribute_group *typec_partner_groups[] = { 717 &typec_partner_group, 718 NULL 719 }; 720 721 static void typec_partner_release(struct device *dev) 722 { 723 struct typec_partner *partner = to_typec_partner(dev); 724 725 ida_destroy(&partner->mode_ids); 726 kfree(partner); 727 } 728 729 static const struct device_type typec_partner_dev_type = { 730 .name = "typec_partner", 731 .groups = typec_partner_groups, 732 .release = typec_partner_release, 733 }; 734 735 /** 736 * typec_partner_set_identity - Report result from Discover Identity command 737 * @partner: The partner updated identity values 738 * 739 * This routine is used to report that the result of Discover Identity USB power 740 * delivery command has become available. 741 */ 742 int typec_partner_set_identity(struct typec_partner *partner) 743 { 744 if (!partner->identity) 745 return -EINVAL; 746 747 typec_report_identity(&partner->dev); 748 return 0; 749 } 750 EXPORT_SYMBOL_GPL(typec_partner_set_identity); 751 752 /** 753 * typec_partner_set_pd_revision - Set the PD revision supported by the partner 754 * @partner: The partner to be updated. 755 * @pd_revision: USB Power Delivery Specification Revision supported by partner 756 * 757 * This routine is used to report that the PD revision of the port partner has 758 * become available. 759 */ 760 void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision) 761 { 762 if (partner->pd_revision == pd_revision) 763 return; 764 765 partner->pd_revision = pd_revision; 766 sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision"); 767 if (pd_revision != 0 && !partner->usb_pd) { 768 partner->usb_pd = 1; 769 sysfs_notify(&partner->dev.kobj, NULL, 770 "supports_usb_power_delivery"); 771 } 772 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 773 } 774 EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision); 775 776 /** 777 * typec_partner_set_num_altmodes - Set the number of available partner altmodes 778 * @partner: The partner to be updated. 779 * @num_altmodes: The number of altmodes we want to specify as available. 780 * 781 * This routine is used to report the number of alternate modes supported by the 782 * partner. This value is *not* enforced in alternate mode registration routines. 783 * 784 * @partner.num_altmodes is set to -1 on partner registration, denoting that 785 * a valid value has not been set for it yet. 786 * 787 * Returns 0 on success or negative error number on failure. 788 */ 789 int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes) 790 { 791 int ret; 792 793 if (num_altmodes < 0) 794 return -EINVAL; 795 796 partner->num_altmodes = num_altmodes; 797 ret = sysfs_update_group(&partner->dev.kobj, &typec_partner_group); 798 if (ret < 0) 799 return ret; 800 801 sysfs_notify(&partner->dev.kobj, NULL, "number_of_alternate_modes"); 802 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 803 804 return 0; 805 } 806 EXPORT_SYMBOL_GPL(typec_partner_set_num_altmodes); 807 808 /** 809 * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode 810 * @partner: USB Type-C Partner that supports the alternate mode 811 * @desc: Description of the alternate mode 812 * 813 * This routine is used to register each alternate mode individually that 814 * @partner has listed in response to Discover SVIDs command. The modes for a 815 * SVID listed in response to Discover Modes command need to be listed in an 816 * array in @desc. 817 * 818 * Returns handle to the alternate mode on success or ERR_PTR on failure. 819 */ 820 struct typec_altmode * 821 typec_partner_register_altmode(struct typec_partner *partner, 822 const struct typec_altmode_desc *desc) 823 { 824 return typec_register_altmode(&partner->dev, desc); 825 } 826 EXPORT_SYMBOL_GPL(typec_partner_register_altmode); 827 828 /** 829 * typec_partner_set_svdm_version - Set negotiated Structured VDM (SVDM) Version 830 * @partner: USB Type-C Partner that supports SVDM 831 * @svdm_version: Negotiated SVDM Version 832 * 833 * This routine is used to save the negotiated SVDM Version. 834 */ 835 void typec_partner_set_svdm_version(struct typec_partner *partner, 836 enum usb_pd_svdm_ver svdm_version) 837 { 838 partner->svdm_version = svdm_version; 839 } 840 EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version); 841 842 /** 843 * typec_register_partner - Register a USB Type-C Partner 844 * @port: The USB Type-C Port the partner is connected to 845 * @desc: Description of the partner 846 * 847 * Registers a device for USB Type-C Partner described in @desc. 848 * 849 * Returns handle to the partner on success or ERR_PTR on failure. 850 */ 851 struct typec_partner *typec_register_partner(struct typec_port *port, 852 struct typec_partner_desc *desc) 853 { 854 struct typec_partner *partner; 855 int ret; 856 857 partner = kzalloc(sizeof(*partner), GFP_KERNEL); 858 if (!partner) 859 return ERR_PTR(-ENOMEM); 860 861 ida_init(&partner->mode_ids); 862 partner->usb_pd = desc->usb_pd; 863 partner->accessory = desc->accessory; 864 partner->num_altmodes = -1; 865 partner->pd_revision = desc->pd_revision; 866 partner->svdm_version = port->cap->svdm_version; 867 868 if (desc->identity) { 869 /* 870 * Creating directory for the identity only if the driver is 871 * able to provide data to it. 872 */ 873 partner->dev.groups = usb_pd_id_groups; 874 partner->identity = desc->identity; 875 } 876 877 partner->dev.class = typec_class; 878 partner->dev.parent = &port->dev; 879 partner->dev.type = &typec_partner_dev_type; 880 dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev)); 881 882 ret = device_register(&partner->dev); 883 if (ret) { 884 dev_err(&port->dev, "failed to register partner (%d)\n", ret); 885 put_device(&partner->dev); 886 return ERR_PTR(ret); 887 } 888 889 return partner; 890 } 891 EXPORT_SYMBOL_GPL(typec_register_partner); 892 893 /** 894 * typec_unregister_partner - Unregister a USB Type-C Partner 895 * @partner: The partner to be unregistered 896 * 897 * Unregister device created with typec_register_partner(). 898 */ 899 void typec_unregister_partner(struct typec_partner *partner) 900 { 901 if (!IS_ERR_OR_NULL(partner)) 902 device_unregister(&partner->dev); 903 } 904 EXPORT_SYMBOL_GPL(typec_unregister_partner); 905 906 /* ------------------------------------------------------------------------- */ 907 /* Type-C Cable Plugs */ 908 909 static void typec_plug_release(struct device *dev) 910 { 911 struct typec_plug *plug = to_typec_plug(dev); 912 913 ida_destroy(&plug->mode_ids); 914 kfree(plug); 915 } 916 917 static struct attribute *typec_plug_attrs[] = { 918 &dev_attr_number_of_alternate_modes.attr, 919 NULL 920 }; 921 922 static umode_t typec_plug_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 923 { 924 struct typec_plug *plug = to_typec_plug(kobj_to_dev(kobj)); 925 926 if (attr == &dev_attr_number_of_alternate_modes.attr) { 927 if (plug->num_altmodes < 0) 928 return 0; 929 } 930 931 return attr->mode; 932 } 933 934 static const struct attribute_group typec_plug_group = { 935 .is_visible = typec_plug_attr_is_visible, 936 .attrs = typec_plug_attrs 937 }; 938 939 static const struct attribute_group *typec_plug_groups[] = { 940 &typec_plug_group, 941 NULL 942 }; 943 944 static const struct device_type typec_plug_dev_type = { 945 .name = "typec_plug", 946 .groups = typec_plug_groups, 947 .release = typec_plug_release, 948 }; 949 950 /** 951 * typec_plug_set_num_altmodes - Set the number of available plug altmodes 952 * @plug: The plug to be updated. 953 * @num_altmodes: The number of altmodes we want to specify as available. 954 * 955 * This routine is used to report the number of alternate modes supported by the 956 * plug. This value is *not* enforced in alternate mode registration routines. 957 * 958 * @plug.num_altmodes is set to -1 on plug registration, denoting that 959 * a valid value has not been set for it yet. 960 * 961 * Returns 0 on success or negative error number on failure. 962 */ 963 int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes) 964 { 965 int ret; 966 967 if (num_altmodes < 0) 968 return -EINVAL; 969 970 plug->num_altmodes = num_altmodes; 971 ret = sysfs_update_group(&plug->dev.kobj, &typec_plug_group); 972 if (ret < 0) 973 return ret; 974 975 sysfs_notify(&plug->dev.kobj, NULL, "number_of_alternate_modes"); 976 kobject_uevent(&plug->dev.kobj, KOBJ_CHANGE); 977 978 return 0; 979 } 980 EXPORT_SYMBOL_GPL(typec_plug_set_num_altmodes); 981 982 /** 983 * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode 984 * @plug: USB Type-C Cable Plug that supports the alternate mode 985 * @desc: Description of the alternate mode 986 * 987 * This routine is used to register each alternate mode individually that @plug 988 * has listed in response to Discover SVIDs command. The modes for a SVID that 989 * the plug lists in response to Discover Modes command need to be listed in an 990 * array in @desc. 991 * 992 * Returns handle to the alternate mode on success or ERR_PTR on failure. 993 */ 994 struct typec_altmode * 995 typec_plug_register_altmode(struct typec_plug *plug, 996 const struct typec_altmode_desc *desc) 997 { 998 return typec_register_altmode(&plug->dev, desc); 999 } 1000 EXPORT_SYMBOL_GPL(typec_plug_register_altmode); 1001 1002 /** 1003 * typec_register_plug - Register a USB Type-C Cable Plug 1004 * @cable: USB Type-C Cable with the plug 1005 * @desc: Description of the cable plug 1006 * 1007 * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C 1008 * Cable Plug represents a plug with electronics in it that can response to USB 1009 * Power Delivery SOP Prime or SOP Double Prime packages. 1010 * 1011 * Returns handle to the cable plug on success or ERR_PTR on failure. 1012 */ 1013 struct typec_plug *typec_register_plug(struct typec_cable *cable, 1014 struct typec_plug_desc *desc) 1015 { 1016 struct typec_plug *plug; 1017 char name[8]; 1018 int ret; 1019 1020 plug = kzalloc(sizeof(*plug), GFP_KERNEL); 1021 if (!plug) 1022 return ERR_PTR(-ENOMEM); 1023 1024 sprintf(name, "plug%d", desc->index); 1025 1026 ida_init(&plug->mode_ids); 1027 plug->num_altmodes = -1; 1028 plug->index = desc->index; 1029 plug->dev.class = typec_class; 1030 plug->dev.parent = &cable->dev; 1031 plug->dev.type = &typec_plug_dev_type; 1032 dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name); 1033 1034 ret = device_register(&plug->dev); 1035 if (ret) { 1036 dev_err(&cable->dev, "failed to register plug (%d)\n", ret); 1037 put_device(&plug->dev); 1038 return ERR_PTR(ret); 1039 } 1040 1041 return plug; 1042 } 1043 EXPORT_SYMBOL_GPL(typec_register_plug); 1044 1045 /** 1046 * typec_unregister_plug - Unregister a USB Type-C Cable Plug 1047 * @plug: The cable plug to be unregistered 1048 * 1049 * Unregister device created with typec_register_plug(). 1050 */ 1051 void typec_unregister_plug(struct typec_plug *plug) 1052 { 1053 if (!IS_ERR_OR_NULL(plug)) 1054 device_unregister(&plug->dev); 1055 } 1056 EXPORT_SYMBOL_GPL(typec_unregister_plug); 1057 1058 /* Type-C Cables */ 1059 1060 static const char * const typec_plug_types[] = { 1061 [USB_PLUG_NONE] = "unknown", 1062 [USB_PLUG_TYPE_A] = "type-a", 1063 [USB_PLUG_TYPE_B] = "type-b", 1064 [USB_PLUG_TYPE_C] = "type-c", 1065 [USB_PLUG_CAPTIVE] = "captive", 1066 }; 1067 1068 static ssize_t plug_type_show(struct device *dev, 1069 struct device_attribute *attr, char *buf) 1070 { 1071 struct typec_cable *cable = to_typec_cable(dev); 1072 1073 return sprintf(buf, "%s\n", typec_plug_types[cable->type]); 1074 } 1075 static DEVICE_ATTR_RO(plug_type); 1076 1077 static struct attribute *typec_cable_attrs[] = { 1078 &dev_attr_type.attr, 1079 &dev_attr_plug_type.attr, 1080 &dev_attr_usb_power_delivery_revision.attr, 1081 NULL 1082 }; 1083 ATTRIBUTE_GROUPS(typec_cable); 1084 1085 static void typec_cable_release(struct device *dev) 1086 { 1087 struct typec_cable *cable = to_typec_cable(dev); 1088 1089 kfree(cable); 1090 } 1091 1092 static const struct device_type typec_cable_dev_type = { 1093 .name = "typec_cable", 1094 .groups = typec_cable_groups, 1095 .release = typec_cable_release, 1096 }; 1097 1098 static int cable_match(struct device *dev, void *data) 1099 { 1100 return is_typec_cable(dev); 1101 } 1102 1103 /** 1104 * typec_cable_get - Get a reference to the USB Type-C cable 1105 * @port: The USB Type-C Port the cable is connected to 1106 * 1107 * The caller must decrement the reference count with typec_cable_put() after 1108 * use. 1109 */ 1110 struct typec_cable *typec_cable_get(struct typec_port *port) 1111 { 1112 struct device *dev; 1113 1114 dev = device_find_child(&port->dev, NULL, cable_match); 1115 if (!dev) 1116 return NULL; 1117 1118 return to_typec_cable(dev); 1119 } 1120 EXPORT_SYMBOL_GPL(typec_cable_get); 1121 1122 /** 1123 * typec_cable_put - Decrement the reference count on USB Type-C cable 1124 * @cable: The USB Type-C cable 1125 */ 1126 void typec_cable_put(struct typec_cable *cable) 1127 { 1128 put_device(&cable->dev); 1129 } 1130 EXPORT_SYMBOL_GPL(typec_cable_put); 1131 1132 /** 1133 * typec_cable_is_active - Check is the USB Type-C cable active or passive 1134 * @cable: The USB Type-C Cable 1135 * 1136 * Return 1 if the cable is active or 0 if it's passive. 1137 */ 1138 int typec_cable_is_active(struct typec_cable *cable) 1139 { 1140 return cable->active; 1141 } 1142 EXPORT_SYMBOL_GPL(typec_cable_is_active); 1143 1144 /** 1145 * typec_cable_set_identity - Report result from Discover Identity command 1146 * @cable: The cable updated identity values 1147 * 1148 * This routine is used to report that the result of Discover Identity USB power 1149 * delivery command has become available. 1150 */ 1151 int typec_cable_set_identity(struct typec_cable *cable) 1152 { 1153 if (!cable->identity) 1154 return -EINVAL; 1155 1156 typec_report_identity(&cable->dev); 1157 return 0; 1158 } 1159 EXPORT_SYMBOL_GPL(typec_cable_set_identity); 1160 1161 /** 1162 * typec_register_cable - Register a USB Type-C Cable 1163 * @port: The USB Type-C Port the cable is connected to 1164 * @desc: Description of the cable 1165 * 1166 * Registers a device for USB Type-C Cable described in @desc. The cable will be 1167 * parent for the optional cable plug devises. 1168 * 1169 * Returns handle to the cable on success or ERR_PTR on failure. 1170 */ 1171 struct typec_cable *typec_register_cable(struct typec_port *port, 1172 struct typec_cable_desc *desc) 1173 { 1174 struct typec_cable *cable; 1175 int ret; 1176 1177 cable = kzalloc(sizeof(*cable), GFP_KERNEL); 1178 if (!cable) 1179 return ERR_PTR(-ENOMEM); 1180 1181 cable->type = desc->type; 1182 cable->active = desc->active; 1183 cable->pd_revision = desc->pd_revision; 1184 1185 if (desc->identity) { 1186 /* 1187 * Creating directory for the identity only if the driver is 1188 * able to provide data to it. 1189 */ 1190 cable->dev.groups = usb_pd_id_groups; 1191 cable->identity = desc->identity; 1192 } 1193 1194 cable->dev.class = typec_class; 1195 cable->dev.parent = &port->dev; 1196 cable->dev.type = &typec_cable_dev_type; 1197 dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev)); 1198 1199 ret = device_register(&cable->dev); 1200 if (ret) { 1201 dev_err(&port->dev, "failed to register cable (%d)\n", ret); 1202 put_device(&cable->dev); 1203 return ERR_PTR(ret); 1204 } 1205 1206 return cable; 1207 } 1208 EXPORT_SYMBOL_GPL(typec_register_cable); 1209 1210 /** 1211 * typec_unregister_cable - Unregister a USB Type-C Cable 1212 * @cable: The cable to be unregistered 1213 * 1214 * Unregister device created with typec_register_cable(). 1215 */ 1216 void typec_unregister_cable(struct typec_cable *cable) 1217 { 1218 if (!IS_ERR_OR_NULL(cable)) 1219 device_unregister(&cable->dev); 1220 } 1221 EXPORT_SYMBOL_GPL(typec_unregister_cable); 1222 1223 /* ------------------------------------------------------------------------- */ 1224 /* USB Type-C ports */ 1225 1226 static const char * const typec_orientations[] = { 1227 [TYPEC_ORIENTATION_NONE] = "unknown", 1228 [TYPEC_ORIENTATION_NORMAL] = "normal", 1229 [TYPEC_ORIENTATION_REVERSE] = "reverse", 1230 }; 1231 1232 static const char * const typec_roles[] = { 1233 [TYPEC_SINK] = "sink", 1234 [TYPEC_SOURCE] = "source", 1235 }; 1236 1237 static const char * const typec_data_roles[] = { 1238 [TYPEC_DEVICE] = "device", 1239 [TYPEC_HOST] = "host", 1240 }; 1241 1242 static const char * const typec_port_power_roles[] = { 1243 [TYPEC_PORT_SRC] = "source", 1244 [TYPEC_PORT_SNK] = "sink", 1245 [TYPEC_PORT_DRP] = "dual", 1246 }; 1247 1248 static const char * const typec_port_data_roles[] = { 1249 [TYPEC_PORT_DFP] = "host", 1250 [TYPEC_PORT_UFP] = "device", 1251 [TYPEC_PORT_DRD] = "dual", 1252 }; 1253 1254 static const char * const typec_port_types_drp[] = { 1255 [TYPEC_PORT_SRC] = "dual [source] sink", 1256 [TYPEC_PORT_SNK] = "dual source [sink]", 1257 [TYPEC_PORT_DRP] = "[dual] source sink", 1258 }; 1259 1260 static ssize_t 1261 preferred_role_store(struct device *dev, struct device_attribute *attr, 1262 const char *buf, size_t size) 1263 { 1264 struct typec_port *port = to_typec_port(dev); 1265 int role; 1266 int ret; 1267 1268 if (port->cap->type != TYPEC_PORT_DRP) { 1269 dev_dbg(dev, "Preferred role only supported with DRP ports\n"); 1270 return -EOPNOTSUPP; 1271 } 1272 1273 if (!port->ops || !port->ops->try_role) { 1274 dev_dbg(dev, "Setting preferred role not supported\n"); 1275 return -EOPNOTSUPP; 1276 } 1277 1278 role = sysfs_match_string(typec_roles, buf); 1279 if (role < 0) { 1280 if (sysfs_streq(buf, "none")) 1281 role = TYPEC_NO_PREFERRED_ROLE; 1282 else 1283 return -EINVAL; 1284 } 1285 1286 ret = port->ops->try_role(port, role); 1287 if (ret) 1288 return ret; 1289 1290 port->prefer_role = role; 1291 return size; 1292 } 1293 1294 static ssize_t 1295 preferred_role_show(struct device *dev, struct device_attribute *attr, 1296 char *buf) 1297 { 1298 struct typec_port *port = to_typec_port(dev); 1299 1300 if (port->cap->type != TYPEC_PORT_DRP) 1301 return 0; 1302 1303 if (port->prefer_role < 0) 1304 return 0; 1305 1306 return sprintf(buf, "%s\n", typec_roles[port->prefer_role]); 1307 } 1308 static DEVICE_ATTR_RW(preferred_role); 1309 1310 static ssize_t data_role_store(struct device *dev, 1311 struct device_attribute *attr, 1312 const char *buf, size_t size) 1313 { 1314 struct typec_port *port = to_typec_port(dev); 1315 int ret; 1316 1317 if (!port->ops || !port->ops->dr_set) { 1318 dev_dbg(dev, "data role swapping not supported\n"); 1319 return -EOPNOTSUPP; 1320 } 1321 1322 ret = sysfs_match_string(typec_data_roles, buf); 1323 if (ret < 0) 1324 return ret; 1325 1326 mutex_lock(&port->port_type_lock); 1327 if (port->cap->data != TYPEC_PORT_DRD) { 1328 ret = -EOPNOTSUPP; 1329 goto unlock_and_ret; 1330 } 1331 1332 ret = port->ops->dr_set(port, ret); 1333 if (ret) 1334 goto unlock_and_ret; 1335 1336 ret = size; 1337 unlock_and_ret: 1338 mutex_unlock(&port->port_type_lock); 1339 return ret; 1340 } 1341 1342 static ssize_t data_role_show(struct device *dev, 1343 struct device_attribute *attr, char *buf) 1344 { 1345 struct typec_port *port = to_typec_port(dev); 1346 1347 if (port->cap->data == TYPEC_PORT_DRD) 1348 return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ? 1349 "[host] device" : "host [device]"); 1350 1351 return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]); 1352 } 1353 static DEVICE_ATTR_RW(data_role); 1354 1355 static ssize_t power_role_store(struct device *dev, 1356 struct device_attribute *attr, 1357 const char *buf, size_t size) 1358 { 1359 struct typec_port *port = to_typec_port(dev); 1360 int ret; 1361 1362 if (!port->ops || !port->ops->pr_set) { 1363 dev_dbg(dev, "power role swapping not supported\n"); 1364 return -EOPNOTSUPP; 1365 } 1366 1367 if (port->pwr_opmode != TYPEC_PWR_MODE_PD) { 1368 dev_dbg(dev, "partner unable to swap power role\n"); 1369 return -EIO; 1370 } 1371 1372 ret = sysfs_match_string(typec_roles, buf); 1373 if (ret < 0) 1374 return ret; 1375 1376 mutex_lock(&port->port_type_lock); 1377 if (port->port_type != TYPEC_PORT_DRP) { 1378 dev_dbg(dev, "port type fixed at \"%s\"", 1379 typec_port_power_roles[port->port_type]); 1380 ret = -EOPNOTSUPP; 1381 goto unlock_and_ret; 1382 } 1383 1384 ret = port->ops->pr_set(port, ret); 1385 if (ret) 1386 goto unlock_and_ret; 1387 1388 ret = size; 1389 unlock_and_ret: 1390 mutex_unlock(&port->port_type_lock); 1391 return ret; 1392 } 1393 1394 static ssize_t power_role_show(struct device *dev, 1395 struct device_attribute *attr, char *buf) 1396 { 1397 struct typec_port *port = to_typec_port(dev); 1398 1399 if (port->cap->type == TYPEC_PORT_DRP) 1400 return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ? 1401 "[source] sink" : "source [sink]"); 1402 1403 return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]); 1404 } 1405 static DEVICE_ATTR_RW(power_role); 1406 1407 static ssize_t 1408 port_type_store(struct device *dev, struct device_attribute *attr, 1409 const char *buf, size_t size) 1410 { 1411 struct typec_port *port = to_typec_port(dev); 1412 int ret; 1413 enum typec_port_type type; 1414 1415 if (port->cap->type != TYPEC_PORT_DRP || 1416 !port->ops || !port->ops->port_type_set) { 1417 dev_dbg(dev, "changing port type not supported\n"); 1418 return -EOPNOTSUPP; 1419 } 1420 1421 ret = sysfs_match_string(typec_port_power_roles, buf); 1422 if (ret < 0) 1423 return ret; 1424 1425 type = ret; 1426 mutex_lock(&port->port_type_lock); 1427 1428 if (port->port_type == type) { 1429 ret = size; 1430 goto unlock_and_ret; 1431 } 1432 1433 ret = port->ops->port_type_set(port, type); 1434 if (ret) 1435 goto unlock_and_ret; 1436 1437 port->port_type = type; 1438 ret = size; 1439 1440 unlock_and_ret: 1441 mutex_unlock(&port->port_type_lock); 1442 return ret; 1443 } 1444 1445 static ssize_t 1446 port_type_show(struct device *dev, struct device_attribute *attr, 1447 char *buf) 1448 { 1449 struct typec_port *port = to_typec_port(dev); 1450 1451 if (port->cap->type == TYPEC_PORT_DRP) 1452 return sprintf(buf, "%s\n", 1453 typec_port_types_drp[port->port_type]); 1454 1455 return sprintf(buf, "[%s]\n", typec_port_power_roles[port->cap->type]); 1456 } 1457 static DEVICE_ATTR_RW(port_type); 1458 1459 static const char * const typec_pwr_opmodes[] = { 1460 [TYPEC_PWR_MODE_USB] = "default", 1461 [TYPEC_PWR_MODE_1_5A] = "1.5A", 1462 [TYPEC_PWR_MODE_3_0A] = "3.0A", 1463 [TYPEC_PWR_MODE_PD] = "usb_power_delivery", 1464 }; 1465 1466 static ssize_t power_operation_mode_show(struct device *dev, 1467 struct device_attribute *attr, 1468 char *buf) 1469 { 1470 struct typec_port *port = to_typec_port(dev); 1471 1472 return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]); 1473 } 1474 static DEVICE_ATTR_RO(power_operation_mode); 1475 1476 static ssize_t vconn_source_store(struct device *dev, 1477 struct device_attribute *attr, 1478 const char *buf, size_t size) 1479 { 1480 struct typec_port *port = to_typec_port(dev); 1481 bool source; 1482 int ret; 1483 1484 if (!port->cap->pd_revision) { 1485 dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n"); 1486 return -EOPNOTSUPP; 1487 } 1488 1489 if (!port->ops || !port->ops->vconn_set) { 1490 dev_dbg(dev, "VCONN swapping not supported\n"); 1491 return -EOPNOTSUPP; 1492 } 1493 1494 ret = kstrtobool(buf, &source); 1495 if (ret) 1496 return ret; 1497 1498 ret = port->ops->vconn_set(port, (enum typec_role)source); 1499 if (ret) 1500 return ret; 1501 1502 return size; 1503 } 1504 1505 static ssize_t vconn_source_show(struct device *dev, 1506 struct device_attribute *attr, char *buf) 1507 { 1508 struct typec_port *port = to_typec_port(dev); 1509 1510 return sprintf(buf, "%s\n", 1511 port->vconn_role == TYPEC_SOURCE ? "yes" : "no"); 1512 } 1513 static DEVICE_ATTR_RW(vconn_source); 1514 1515 static ssize_t supported_accessory_modes_show(struct device *dev, 1516 struct device_attribute *attr, 1517 char *buf) 1518 { 1519 struct typec_port *port = to_typec_port(dev); 1520 ssize_t ret = 0; 1521 int i; 1522 1523 for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) { 1524 if (port->cap->accessory[i]) 1525 ret += sprintf(buf + ret, "%s ", 1526 typec_accessory_modes[port->cap->accessory[i]]); 1527 } 1528 1529 if (!ret) 1530 return sprintf(buf, "none\n"); 1531 1532 buf[ret - 1] = '\n'; 1533 1534 return ret; 1535 } 1536 static DEVICE_ATTR_RO(supported_accessory_modes); 1537 1538 static ssize_t usb_typec_revision_show(struct device *dev, 1539 struct device_attribute *attr, 1540 char *buf) 1541 { 1542 struct typec_port *port = to_typec_port(dev); 1543 u16 rev = port->cap->revision; 1544 1545 return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1546 } 1547 static DEVICE_ATTR_RO(usb_typec_revision); 1548 1549 static ssize_t usb_power_delivery_revision_show(struct device *dev, 1550 struct device_attribute *attr, 1551 char *buf) 1552 { 1553 u16 rev = 0; 1554 1555 if (is_typec_partner(dev)) { 1556 struct typec_partner *partner = to_typec_partner(dev); 1557 1558 rev = partner->pd_revision; 1559 } else if (is_typec_cable(dev)) { 1560 struct typec_cable *cable = to_typec_cable(dev); 1561 1562 rev = cable->pd_revision; 1563 } else if (is_typec_port(dev)) { 1564 struct typec_port *p = to_typec_port(dev); 1565 1566 rev = p->cap->pd_revision; 1567 } 1568 return sysfs_emit(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1569 } 1570 1571 static ssize_t orientation_show(struct device *dev, 1572 struct device_attribute *attr, 1573 char *buf) 1574 { 1575 struct typec_port *port = to_typec_port(dev); 1576 1577 return sprintf(buf, "%s\n", typec_orientations[port->orientation]); 1578 } 1579 static DEVICE_ATTR_RO(orientation); 1580 1581 static struct attribute *typec_attrs[] = { 1582 &dev_attr_data_role.attr, 1583 &dev_attr_power_operation_mode.attr, 1584 &dev_attr_power_role.attr, 1585 &dev_attr_preferred_role.attr, 1586 &dev_attr_supported_accessory_modes.attr, 1587 &dev_attr_usb_power_delivery_revision.attr, 1588 &dev_attr_usb_typec_revision.attr, 1589 &dev_attr_vconn_source.attr, 1590 &dev_attr_port_type.attr, 1591 &dev_attr_orientation.attr, 1592 NULL, 1593 }; 1594 1595 static umode_t typec_attr_is_visible(struct kobject *kobj, 1596 struct attribute *attr, int n) 1597 { 1598 struct typec_port *port = to_typec_port(kobj_to_dev(kobj)); 1599 1600 if (attr == &dev_attr_data_role.attr) { 1601 if (port->cap->data != TYPEC_PORT_DRD || 1602 !port->ops || !port->ops->dr_set) 1603 return 0444; 1604 } else if (attr == &dev_attr_power_role.attr) { 1605 if (port->cap->type != TYPEC_PORT_DRP || 1606 !port->ops || !port->ops->pr_set) 1607 return 0444; 1608 } else if (attr == &dev_attr_vconn_source.attr) { 1609 if (!port->cap->pd_revision || 1610 !port->ops || !port->ops->vconn_set) 1611 return 0444; 1612 } else if (attr == &dev_attr_preferred_role.attr) { 1613 if (port->cap->type != TYPEC_PORT_DRP || 1614 !port->ops || !port->ops->try_role) 1615 return 0444; 1616 } else if (attr == &dev_attr_port_type.attr) { 1617 if (!port->ops || !port->ops->port_type_set) 1618 return 0; 1619 if (port->cap->type != TYPEC_PORT_DRP) 1620 return 0444; 1621 } else if (attr == &dev_attr_orientation.attr) { 1622 if (port->cap->orientation_aware) 1623 return 0444; 1624 return 0; 1625 } 1626 1627 return attr->mode; 1628 } 1629 1630 static const struct attribute_group typec_group = { 1631 .is_visible = typec_attr_is_visible, 1632 .attrs = typec_attrs, 1633 }; 1634 1635 static const struct attribute_group *typec_groups[] = { 1636 &typec_group, 1637 NULL 1638 }; 1639 1640 static int typec_uevent(struct device *dev, struct kobj_uevent_env *env) 1641 { 1642 int ret; 1643 1644 ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev)); 1645 if (ret) 1646 dev_err(dev, "failed to add uevent TYPEC_PORT\n"); 1647 1648 return ret; 1649 } 1650 1651 static void typec_release(struct device *dev) 1652 { 1653 struct typec_port *port = to_typec_port(dev); 1654 1655 ida_simple_remove(&typec_index_ida, port->id); 1656 ida_destroy(&port->mode_ids); 1657 typec_switch_put(port->sw); 1658 typec_mux_put(port->mux); 1659 kfree(port->cap); 1660 kfree(port); 1661 } 1662 1663 const struct device_type typec_port_dev_type = { 1664 .name = "typec_port", 1665 .groups = typec_groups, 1666 .uevent = typec_uevent, 1667 .release = typec_release, 1668 }; 1669 1670 /* --------------------------------------- */ 1671 /* Driver callbacks to report role updates */ 1672 1673 static int partner_match(struct device *dev, void *data) 1674 { 1675 return is_typec_partner(dev); 1676 } 1677 1678 /** 1679 * typec_set_data_role - Report data role change 1680 * @port: The USB Type-C Port where the role was changed 1681 * @role: The new data role 1682 * 1683 * This routine is used by the port drivers to report data role changes. 1684 */ 1685 void typec_set_data_role(struct typec_port *port, enum typec_data_role role) 1686 { 1687 struct device *partner_dev; 1688 1689 if (port->data_role == role) 1690 return; 1691 1692 port->data_role = role; 1693 sysfs_notify(&port->dev.kobj, NULL, "data_role"); 1694 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1695 1696 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1697 if (!partner_dev) 1698 return; 1699 1700 if (to_typec_partner(partner_dev)->identity) 1701 typec_product_type_notify(partner_dev); 1702 1703 put_device(partner_dev); 1704 } 1705 EXPORT_SYMBOL_GPL(typec_set_data_role); 1706 1707 /** 1708 * typec_set_pwr_role - Report power role change 1709 * @port: The USB Type-C Port where the role was changed 1710 * @role: The new data role 1711 * 1712 * This routine is used by the port drivers to report power role changes. 1713 */ 1714 void typec_set_pwr_role(struct typec_port *port, enum typec_role role) 1715 { 1716 if (port->pwr_role == role) 1717 return; 1718 1719 port->pwr_role = role; 1720 sysfs_notify(&port->dev.kobj, NULL, "power_role"); 1721 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1722 } 1723 EXPORT_SYMBOL_GPL(typec_set_pwr_role); 1724 1725 /** 1726 * typec_set_vconn_role - Report VCONN source change 1727 * @port: The USB Type-C Port which VCONN role changed 1728 * @role: Source when @port is sourcing VCONN, or Sink when it's not 1729 * 1730 * This routine is used by the port drivers to report if the VCONN source is 1731 * changes. 1732 */ 1733 void typec_set_vconn_role(struct typec_port *port, enum typec_role role) 1734 { 1735 if (port->vconn_role == role) 1736 return; 1737 1738 port->vconn_role = role; 1739 sysfs_notify(&port->dev.kobj, NULL, "vconn_source"); 1740 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1741 } 1742 EXPORT_SYMBOL_GPL(typec_set_vconn_role); 1743 1744 /** 1745 * typec_set_pwr_opmode - Report changed power operation mode 1746 * @port: The USB Type-C Port where the mode was changed 1747 * @opmode: New power operation mode 1748 * 1749 * This routine is used by the port drivers to report changed power operation 1750 * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB 1751 * Type-C specification, and "USB Power Delivery" when the power levels are 1752 * negotiated with methods defined in USB Power Delivery specification. 1753 */ 1754 void typec_set_pwr_opmode(struct typec_port *port, 1755 enum typec_pwr_opmode opmode) 1756 { 1757 struct device *partner_dev; 1758 1759 if (port->pwr_opmode == opmode) 1760 return; 1761 1762 port->pwr_opmode = opmode; 1763 sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode"); 1764 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1765 1766 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1767 if (partner_dev) { 1768 struct typec_partner *partner = to_typec_partner(partner_dev); 1769 1770 if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) { 1771 partner->usb_pd = 1; 1772 sysfs_notify(&partner_dev->kobj, NULL, 1773 "supports_usb_power_delivery"); 1774 } 1775 put_device(partner_dev); 1776 } 1777 } 1778 EXPORT_SYMBOL_GPL(typec_set_pwr_opmode); 1779 1780 /** 1781 * typec_find_pwr_opmode - Get the typec power operation mode capability 1782 * @name: power operation mode string 1783 * 1784 * This routine is used to find the typec_pwr_opmode by its string @name. 1785 * 1786 * Returns typec_pwr_opmode if success, otherwise negative error code. 1787 */ 1788 int typec_find_pwr_opmode(const char *name) 1789 { 1790 return match_string(typec_pwr_opmodes, 1791 ARRAY_SIZE(typec_pwr_opmodes), name); 1792 } 1793 EXPORT_SYMBOL_GPL(typec_find_pwr_opmode); 1794 1795 /** 1796 * typec_find_orientation - Convert orientation string to enum typec_orientation 1797 * @name: Orientation string 1798 * 1799 * This routine is used to find the typec_orientation by its string name @name. 1800 * 1801 * Returns the orientation value on success, otherwise negative error code. 1802 */ 1803 int typec_find_orientation(const char *name) 1804 { 1805 return match_string(typec_orientations, ARRAY_SIZE(typec_orientations), 1806 name); 1807 } 1808 EXPORT_SYMBOL_GPL(typec_find_orientation); 1809 1810 /** 1811 * typec_find_port_power_role - Get the typec port power capability 1812 * @name: port power capability string 1813 * 1814 * This routine is used to find the typec_port_type by its string name. 1815 * 1816 * Returns typec_port_type if success, otherwise negative error code. 1817 */ 1818 int typec_find_port_power_role(const char *name) 1819 { 1820 return match_string(typec_port_power_roles, 1821 ARRAY_SIZE(typec_port_power_roles), name); 1822 } 1823 EXPORT_SYMBOL_GPL(typec_find_port_power_role); 1824 1825 /** 1826 * typec_find_power_role - Find the typec one specific power role 1827 * @name: power role string 1828 * 1829 * This routine is used to find the typec_role by its string name. 1830 * 1831 * Returns typec_role if success, otherwise negative error code. 1832 */ 1833 int typec_find_power_role(const char *name) 1834 { 1835 return match_string(typec_roles, ARRAY_SIZE(typec_roles), name); 1836 } 1837 EXPORT_SYMBOL_GPL(typec_find_power_role); 1838 1839 /** 1840 * typec_find_port_data_role - Get the typec port data capability 1841 * @name: port data capability string 1842 * 1843 * This routine is used to find the typec_port_data by its string name. 1844 * 1845 * Returns typec_port_data if success, otherwise negative error code. 1846 */ 1847 int typec_find_port_data_role(const char *name) 1848 { 1849 return match_string(typec_port_data_roles, 1850 ARRAY_SIZE(typec_port_data_roles), name); 1851 } 1852 EXPORT_SYMBOL_GPL(typec_find_port_data_role); 1853 1854 /* ------------------------------------------ */ 1855 /* API for Multiplexer/DeMultiplexer Switches */ 1856 1857 /** 1858 * typec_set_orientation - Set USB Type-C cable plug orientation 1859 * @port: USB Type-C Port 1860 * @orientation: USB Type-C cable plug orientation 1861 * 1862 * Set cable plug orientation for @port. 1863 */ 1864 int typec_set_orientation(struct typec_port *port, 1865 enum typec_orientation orientation) 1866 { 1867 int ret; 1868 1869 ret = typec_switch_set(port->sw, orientation); 1870 if (ret) 1871 return ret; 1872 1873 port->orientation = orientation; 1874 sysfs_notify(&port->dev.kobj, NULL, "orientation"); 1875 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1876 1877 return 0; 1878 } 1879 EXPORT_SYMBOL_GPL(typec_set_orientation); 1880 1881 /** 1882 * typec_get_orientation - Get USB Type-C cable plug orientation 1883 * @port: USB Type-C Port 1884 * 1885 * Get current cable plug orientation for @port. 1886 */ 1887 enum typec_orientation typec_get_orientation(struct typec_port *port) 1888 { 1889 return port->orientation; 1890 } 1891 EXPORT_SYMBOL_GPL(typec_get_orientation); 1892 1893 /** 1894 * typec_set_mode - Set mode of operation for USB Type-C connector 1895 * @port: USB Type-C connector 1896 * @mode: Accessory Mode, USB Operation or Safe State 1897 * 1898 * Configure @port for Accessory Mode @mode. This function will configure the 1899 * muxes needed for @mode. 1900 */ 1901 int typec_set_mode(struct typec_port *port, int mode) 1902 { 1903 struct typec_mux_state state = { }; 1904 1905 state.mode = mode; 1906 1907 return typec_mux_set(port->mux, &state); 1908 } 1909 EXPORT_SYMBOL_GPL(typec_set_mode); 1910 1911 /* --------------------------------------- */ 1912 1913 /** 1914 * typec_get_negotiated_svdm_version - Get negotiated SVDM Version 1915 * @port: USB Type-C Port. 1916 * 1917 * Get the negotiated SVDM Version. The Version is set to the port default 1918 * value stored in typec_capability on partner registration, and updated after 1919 * a successful Discover Identity if the negotiated value is less than the 1920 * default value. 1921 * 1922 * Returns usb_pd_svdm_ver if the partner has been registered otherwise -ENODEV. 1923 */ 1924 int typec_get_negotiated_svdm_version(struct typec_port *port) 1925 { 1926 enum usb_pd_svdm_ver svdm_version; 1927 struct device *partner_dev; 1928 1929 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1930 if (!partner_dev) 1931 return -ENODEV; 1932 1933 svdm_version = to_typec_partner(partner_dev)->svdm_version; 1934 put_device(partner_dev); 1935 1936 return svdm_version; 1937 } 1938 EXPORT_SYMBOL_GPL(typec_get_negotiated_svdm_version); 1939 1940 /** 1941 * typec_get_drvdata - Return private driver data pointer 1942 * @port: USB Type-C port 1943 */ 1944 void *typec_get_drvdata(struct typec_port *port) 1945 { 1946 return dev_get_drvdata(&port->dev); 1947 } 1948 EXPORT_SYMBOL_GPL(typec_get_drvdata); 1949 1950 /** 1951 * typec_port_register_altmode - Register USB Type-C Port Alternate Mode 1952 * @port: USB Type-C Port that supports the alternate mode 1953 * @desc: Description of the alternate mode 1954 * 1955 * This routine is used to register an alternate mode that @port is capable of 1956 * supporting. 1957 * 1958 * Returns handle to the alternate mode on success or ERR_PTR on failure. 1959 */ 1960 struct typec_altmode * 1961 typec_port_register_altmode(struct typec_port *port, 1962 const struct typec_altmode_desc *desc) 1963 { 1964 struct typec_altmode *adev; 1965 struct typec_mux *mux; 1966 1967 mux = typec_mux_get(&port->dev, desc); 1968 if (IS_ERR(mux)) 1969 return ERR_CAST(mux); 1970 1971 adev = typec_register_altmode(&port->dev, desc); 1972 if (IS_ERR(adev)) 1973 typec_mux_put(mux); 1974 else 1975 to_altmode(adev)->mux = mux; 1976 1977 return adev; 1978 } 1979 EXPORT_SYMBOL_GPL(typec_port_register_altmode); 1980 1981 /** 1982 * typec_register_port - Register a USB Type-C Port 1983 * @parent: Parent device 1984 * @cap: Description of the port 1985 * 1986 * Registers a device for USB Type-C Port described in @cap. 1987 * 1988 * Returns handle to the port on success or ERR_PTR on failure. 1989 */ 1990 struct typec_port *typec_register_port(struct device *parent, 1991 const struct typec_capability *cap) 1992 { 1993 struct typec_port *port; 1994 int ret; 1995 int id; 1996 1997 port = kzalloc(sizeof(*port), GFP_KERNEL); 1998 if (!port) 1999 return ERR_PTR(-ENOMEM); 2000 2001 id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL); 2002 if (id < 0) { 2003 kfree(port); 2004 return ERR_PTR(id); 2005 } 2006 2007 switch (cap->type) { 2008 case TYPEC_PORT_SRC: 2009 port->pwr_role = TYPEC_SOURCE; 2010 port->vconn_role = TYPEC_SOURCE; 2011 break; 2012 case TYPEC_PORT_SNK: 2013 port->pwr_role = TYPEC_SINK; 2014 port->vconn_role = TYPEC_SINK; 2015 break; 2016 case TYPEC_PORT_DRP: 2017 if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE) 2018 port->pwr_role = cap->prefer_role; 2019 else 2020 port->pwr_role = TYPEC_SINK; 2021 break; 2022 } 2023 2024 switch (cap->data) { 2025 case TYPEC_PORT_DFP: 2026 port->data_role = TYPEC_HOST; 2027 break; 2028 case TYPEC_PORT_UFP: 2029 port->data_role = TYPEC_DEVICE; 2030 break; 2031 case TYPEC_PORT_DRD: 2032 if (cap->prefer_role == TYPEC_SOURCE) 2033 port->data_role = TYPEC_HOST; 2034 else 2035 port->data_role = TYPEC_DEVICE; 2036 break; 2037 } 2038 2039 ida_init(&port->mode_ids); 2040 mutex_init(&port->port_type_lock); 2041 2042 port->id = id; 2043 port->ops = cap->ops; 2044 port->port_type = cap->type; 2045 port->prefer_role = cap->prefer_role; 2046 2047 device_initialize(&port->dev); 2048 port->dev.class = typec_class; 2049 port->dev.parent = parent; 2050 port->dev.fwnode = cap->fwnode; 2051 port->dev.type = &typec_port_dev_type; 2052 dev_set_name(&port->dev, "port%d", id); 2053 dev_set_drvdata(&port->dev, cap->driver_data); 2054 2055 port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL); 2056 if (!port->cap) { 2057 put_device(&port->dev); 2058 return ERR_PTR(-ENOMEM); 2059 } 2060 2061 port->sw = typec_switch_get(&port->dev); 2062 if (IS_ERR(port->sw)) { 2063 ret = PTR_ERR(port->sw); 2064 put_device(&port->dev); 2065 return ERR_PTR(ret); 2066 } 2067 2068 port->mux = typec_mux_get(&port->dev, NULL); 2069 if (IS_ERR(port->mux)) { 2070 ret = PTR_ERR(port->mux); 2071 put_device(&port->dev); 2072 return ERR_PTR(ret); 2073 } 2074 2075 ret = device_add(&port->dev); 2076 if (ret) { 2077 dev_err(parent, "failed to register port (%d)\n", ret); 2078 put_device(&port->dev); 2079 return ERR_PTR(ret); 2080 } 2081 2082 return port; 2083 } 2084 EXPORT_SYMBOL_GPL(typec_register_port); 2085 2086 /** 2087 * typec_unregister_port - Unregister a USB Type-C Port 2088 * @port: The port to be unregistered 2089 * 2090 * Unregister device created with typec_register_port(). 2091 */ 2092 void typec_unregister_port(struct typec_port *port) 2093 { 2094 if (!IS_ERR_OR_NULL(port)) 2095 device_unregister(&port->dev); 2096 } 2097 EXPORT_SYMBOL_GPL(typec_unregister_port); 2098 2099 static int __init typec_init(void) 2100 { 2101 int ret; 2102 2103 ret = bus_register(&typec_bus); 2104 if (ret) 2105 return ret; 2106 2107 ret = class_register(&typec_mux_class); 2108 if (ret) 2109 goto err_unregister_bus; 2110 2111 typec_class = class_create(THIS_MODULE, "typec"); 2112 if (IS_ERR(typec_class)) { 2113 ret = PTR_ERR(typec_class); 2114 goto err_unregister_mux_class; 2115 } 2116 2117 return 0; 2118 2119 err_unregister_mux_class: 2120 class_unregister(&typec_mux_class); 2121 2122 err_unregister_bus: 2123 bus_unregister(&typec_bus); 2124 2125 return ret; 2126 } 2127 subsys_initcall(typec_init); 2128 2129 static void __exit typec_exit(void) 2130 { 2131 class_destroy(typec_class); 2132 ida_destroy(&typec_index_ida); 2133 bus_unregister(&typec_bus); 2134 class_unregister(&typec_mux_class); 2135 } 2136 module_exit(typec_exit); 2137 2138 MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>"); 2139 MODULE_LICENSE("GPL v2"); 2140 MODULE_DESCRIPTION("USB Type-C Connector Class"); 2141