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#include <linux/usb/typec_retimer.h> 16#include <linux/usb.h> 17 18#include "bus.h" 19#include "class.h" 20#include "pd.h" 21 22static DEFINE_IDA(typec_index_ida); 23 24const struct class typec_class = { 25 .name = "typec", 26}; 27 28/* ------------------------------------------------------------------------- */ 29/* Common attributes */ 30 31static const char * const typec_accessory_modes[] = { 32 [TYPEC_ACCESSORY_NONE] = "none", 33 [TYPEC_ACCESSORY_AUDIO] = "analog_audio", 34 [TYPEC_ACCESSORY_DEBUG] = "debug", 35}; 36 37/* Product types defined in USB PD Specification R3.0 V2.0 */ 38static const char * const product_type_ufp[8] = { 39 [IDH_PTYPE_NOT_UFP] = "not_ufp", 40 [IDH_PTYPE_HUB] = "hub", 41 [IDH_PTYPE_PERIPH] = "peripheral", 42 [IDH_PTYPE_PSD] = "psd", 43 [IDH_PTYPE_AMA] = "ama", 44}; 45 46static const char * const product_type_dfp[8] = { 47 [IDH_PTYPE_NOT_DFP] = "not_dfp", 48 [IDH_PTYPE_DFP_HUB] = "hub", 49 [IDH_PTYPE_DFP_HOST] = "host", 50 [IDH_PTYPE_DFP_PB] = "power_brick", 51}; 52 53static const char * const product_type_cable[8] = { 54 [IDH_PTYPE_NOT_CABLE] = "not_cable", 55 [IDH_PTYPE_PCABLE] = "passive", 56 [IDH_PTYPE_ACABLE] = "active", 57 [IDH_PTYPE_VPD] = "vpd", 58}; 59 60static struct usb_pd_identity *get_pd_identity(struct device *dev) 61{ 62 if (is_typec_partner(dev)) { 63 struct typec_partner *partner = to_typec_partner(dev); 64 65 return partner->identity; 66 } else if (is_typec_cable(dev)) { 67 struct typec_cable *cable = to_typec_cable(dev); 68 69 return cable->identity; 70 } 71 return NULL; 72} 73 74static const char *get_pd_product_type(struct device *dev) 75{ 76 struct typec_port *port = to_typec_port(dev->parent); 77 struct usb_pd_identity *id = get_pd_identity(dev); 78 const char *ptype = NULL; 79 80 if (is_typec_partner(dev)) { 81 if (!id) 82 return NULL; 83 84 if (port->data_role == TYPEC_HOST) 85 ptype = product_type_ufp[PD_IDH_PTYPE(id->id_header)]; 86 else 87 ptype = product_type_dfp[PD_IDH_DFP_PTYPE(id->id_header)]; 88 } else if (is_typec_cable(dev)) { 89 if (id) 90 ptype = product_type_cable[PD_IDH_PTYPE(id->id_header)]; 91 else 92 ptype = to_typec_cable(dev)->active ? 93 product_type_cable[IDH_PTYPE_ACABLE] : 94 product_type_cable[IDH_PTYPE_PCABLE]; 95 } 96 97 return ptype; 98} 99 100static ssize_t id_header_show(struct device *dev, struct device_attribute *attr, 101 char *buf) 102{ 103 struct usb_pd_identity *id = get_pd_identity(dev); 104 105 return sprintf(buf, "0x%08x\n", id->id_header); 106} 107static DEVICE_ATTR_RO(id_header); 108 109static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr, 110 char *buf) 111{ 112 struct usb_pd_identity *id = get_pd_identity(dev); 113 114 return sprintf(buf, "0x%08x\n", id->cert_stat); 115} 116static DEVICE_ATTR_RO(cert_stat); 117 118static ssize_t product_show(struct device *dev, struct device_attribute *attr, 119 char *buf) 120{ 121 struct usb_pd_identity *id = get_pd_identity(dev); 122 123 return sprintf(buf, "0x%08x\n", id->product); 124} 125static DEVICE_ATTR_RO(product); 126 127static ssize_t product_type_vdo1_show(struct device *dev, struct device_attribute *attr, 128 char *buf) 129{ 130 struct usb_pd_identity *id = get_pd_identity(dev); 131 132 return sysfs_emit(buf, "0x%08x\n", id->vdo[0]); 133} 134static DEVICE_ATTR_RO(product_type_vdo1); 135 136static ssize_t product_type_vdo2_show(struct device *dev, struct device_attribute *attr, 137 char *buf) 138{ 139 struct usb_pd_identity *id = get_pd_identity(dev); 140 141 return sysfs_emit(buf, "0x%08x\n", id->vdo[1]); 142} 143static DEVICE_ATTR_RO(product_type_vdo2); 144 145static ssize_t product_type_vdo3_show(struct device *dev, struct device_attribute *attr, 146 char *buf) 147{ 148 struct usb_pd_identity *id = get_pd_identity(dev); 149 150 return sysfs_emit(buf, "0x%08x\n", id->vdo[2]); 151} 152static DEVICE_ATTR_RO(product_type_vdo3); 153 154static struct attribute *usb_pd_id_attrs[] = { 155 &dev_attr_id_header.attr, 156 &dev_attr_cert_stat.attr, 157 &dev_attr_product.attr, 158 &dev_attr_product_type_vdo1.attr, 159 &dev_attr_product_type_vdo2.attr, 160 &dev_attr_product_type_vdo3.attr, 161 NULL 162}; 163 164static const struct attribute_group usb_pd_id_group = { 165 .name = "identity", 166 .attrs = usb_pd_id_attrs, 167}; 168 169static const struct attribute_group *usb_pd_id_groups[] = { 170 &usb_pd_id_group, 171 NULL, 172}; 173 174static void typec_product_type_notify(struct device *dev) 175{ 176 char *envp[2] = { }; 177 const char *ptype; 178 179 ptype = get_pd_product_type(dev); 180 if (!ptype) 181 return; 182 183 sysfs_notify(&dev->kobj, NULL, "type"); 184 185 envp[0] = kasprintf(GFP_KERNEL, "PRODUCT_TYPE=%s", ptype); 186 if (!envp[0]) 187 return; 188 189 kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); 190 kfree(envp[0]); 191} 192 193static void typec_report_identity(struct device *dev) 194{ 195 sysfs_notify(&dev->kobj, "identity", "id_header"); 196 sysfs_notify(&dev->kobj, "identity", "cert_stat"); 197 sysfs_notify(&dev->kobj, "identity", "product"); 198 sysfs_notify(&dev->kobj, "identity", "product_type_vdo1"); 199 sysfs_notify(&dev->kobj, "identity", "product_type_vdo2"); 200 sysfs_notify(&dev->kobj, "identity", "product_type_vdo3"); 201 typec_product_type_notify(dev); 202} 203 204static ssize_t 205type_show(struct device *dev, struct device_attribute *attr, char *buf) 206{ 207 const char *ptype; 208 209 ptype = get_pd_product_type(dev); 210 if (!ptype) 211 return 0; 212 213 return sysfs_emit(buf, "%s\n", ptype); 214} 215static DEVICE_ATTR_RO(type); 216 217static ssize_t usb_power_delivery_revision_show(struct device *dev, 218 struct device_attribute *attr, 219 char *buf); 220static DEVICE_ATTR_RO(usb_power_delivery_revision); 221 222/* ------------------------------------------------------------------------- */ 223/* Alternate Modes */ 224 225static int altmode_match(struct device *dev, void *data) 226{ 227 struct typec_altmode *adev = to_typec_altmode(dev); 228 struct typec_device_id *id = data; 229 230 if (!is_typec_altmode(dev)) 231 return 0; 232 233 return ((adev->svid == id->svid) && (adev->mode == id->mode)); 234} 235 236static void typec_altmode_set_partner(struct altmode *altmode) 237{ 238 struct typec_altmode *adev = &altmode->adev; 239 struct typec_device_id id = { adev->svid, adev->mode, }; 240 struct typec_port *port = typec_altmode2port(adev); 241 struct altmode *partner; 242 struct device *dev; 243 244 dev = device_find_child(&port->dev, &id, altmode_match); 245 if (!dev) 246 return; 247 248 /* Bind the port alt mode to the partner/plug alt mode. */ 249 partner = to_altmode(to_typec_altmode(dev)); 250 altmode->partner = partner; 251 252 /* Bind the partner/plug alt mode to the port alt mode. */ 253 if (is_typec_plug(adev->dev.parent)) { 254 struct typec_plug *plug = to_typec_plug(adev->dev.parent); 255 256 partner->plug[plug->index] = altmode; 257 } else { 258 partner->partner = altmode; 259 } 260} 261 262static void typec_altmode_put_partner(struct altmode *altmode) 263{ 264 struct altmode *partner = altmode->partner; 265 struct typec_altmode *adev; 266 struct typec_altmode *partner_adev; 267 268 if (!partner) 269 return; 270 271 adev = &altmode->adev; 272 partner_adev = &partner->adev; 273 274 if (is_typec_plug(adev->dev.parent)) { 275 struct typec_plug *plug = to_typec_plug(adev->dev.parent); 276 277 partner->plug[plug->index] = NULL; 278 } else { 279 partner->partner = NULL; 280 } 281 put_device(&partner_adev->dev); 282} 283 284/** 285 * typec_altmode_update_active - Report Enter/Exit mode 286 * @adev: Handle to the alternate mode 287 * @active: True when the mode has been entered 288 * 289 * If a partner or cable plug executes Enter/Exit Mode command successfully, the 290 * drivers use this routine to report the updated state of the mode. 291 */ 292void typec_altmode_update_active(struct typec_altmode *adev, bool active) 293{ 294 char dir[6]; 295 296 if (adev->active == active) 297 return; 298 299 if (!is_typec_port(adev->dev.parent) && adev->dev.driver) { 300 if (!active) 301 module_put(adev->dev.driver->owner); 302 else 303 WARN_ON(!try_module_get(adev->dev.driver->owner)); 304 } 305 306 adev->active = active; 307 snprintf(dir, sizeof(dir), "mode%d", adev->mode); 308 sysfs_notify(&adev->dev.kobj, dir, "active"); 309 sysfs_notify(&adev->dev.kobj, NULL, "active"); 310 kobject_uevent(&adev->dev.kobj, KOBJ_CHANGE); 311} 312EXPORT_SYMBOL_GPL(typec_altmode_update_active); 313 314/** 315 * typec_altmode2port - Alternate Mode to USB Type-C port 316 * @alt: The Alternate Mode 317 * 318 * Returns handle to the port that a cable plug or partner with @alt is 319 * connected to. 320 */ 321struct typec_port *typec_altmode2port(struct typec_altmode *alt) 322{ 323 if (is_typec_plug(alt->dev.parent)) 324 return to_typec_port(alt->dev.parent->parent->parent); 325 if (is_typec_partner(alt->dev.parent)) 326 return to_typec_port(alt->dev.parent->parent); 327 if (is_typec_port(alt->dev.parent)) 328 return to_typec_port(alt->dev.parent); 329 330 return NULL; 331} 332EXPORT_SYMBOL_GPL(typec_altmode2port); 333 334static ssize_t 335vdo_show(struct device *dev, struct device_attribute *attr, char *buf) 336{ 337 struct typec_altmode *alt = to_typec_altmode(dev); 338 339 return sprintf(buf, "0x%08x\n", alt->vdo); 340} 341static DEVICE_ATTR_RO(vdo); 342 343static ssize_t 344description_show(struct device *dev, struct device_attribute *attr, char *buf) 345{ 346 struct typec_altmode *alt = to_typec_altmode(dev); 347 348 return sprintf(buf, "%s\n", alt->desc ? alt->desc : ""); 349} 350static DEVICE_ATTR_RO(description); 351 352static ssize_t 353active_show(struct device *dev, struct device_attribute *attr, char *buf) 354{ 355 struct typec_altmode *alt = to_typec_altmode(dev); 356 357 return sprintf(buf, "%s\n", alt->active ? "yes" : "no"); 358} 359 360static ssize_t active_store(struct device *dev, struct device_attribute *attr, 361 const char *buf, size_t size) 362{ 363 struct typec_altmode *adev = to_typec_altmode(dev); 364 struct altmode *altmode = to_altmode(adev); 365 bool enter; 366 int ret; 367 368 ret = kstrtobool(buf, &enter); 369 if (ret) 370 return ret; 371 372 if (adev->active == enter) 373 return size; 374 375 if (is_typec_port(adev->dev.parent)) { 376 typec_altmode_update_active(adev, enter); 377 378 /* Make sure that the partner exits the mode before disabling */ 379 if (altmode->partner && !enter && altmode->partner->adev.active) 380 typec_altmode_exit(&altmode->partner->adev); 381 } else if (altmode->partner) { 382 if (enter && !altmode->partner->adev.active) { 383 dev_warn(dev, "port has the mode disabled\n"); 384 return -EPERM; 385 } 386 } 387 388 /* Note: If there is no driver, the mode will not be entered */ 389 if (adev->ops && adev->ops->activate) { 390 ret = adev->ops->activate(adev, enter); 391 if (ret) 392 return ret; 393 } 394 395 return size; 396} 397static DEVICE_ATTR_RW(active); 398 399static ssize_t 400supported_roles_show(struct device *dev, struct device_attribute *attr, 401 char *buf) 402{ 403 struct altmode *alt = to_altmode(to_typec_altmode(dev)); 404 ssize_t ret; 405 406 switch (alt->roles) { 407 case TYPEC_PORT_SRC: 408 ret = sprintf(buf, "source\n"); 409 break; 410 case TYPEC_PORT_SNK: 411 ret = sprintf(buf, "sink\n"); 412 break; 413 case TYPEC_PORT_DRP: 414 default: 415 ret = sprintf(buf, "source sink\n"); 416 break; 417 } 418 return ret; 419} 420static DEVICE_ATTR_RO(supported_roles); 421 422static ssize_t 423mode_show(struct device *dev, struct device_attribute *attr, char *buf) 424{ 425 struct typec_altmode *adev = to_typec_altmode(dev); 426 427 return sprintf(buf, "%u\n", adev->mode); 428} 429static DEVICE_ATTR_RO(mode); 430 431static ssize_t 432svid_show(struct device *dev, struct device_attribute *attr, char *buf) 433{ 434 struct typec_altmode *adev = to_typec_altmode(dev); 435 436 return sprintf(buf, "%04x\n", adev->svid); 437} 438static DEVICE_ATTR_RO(svid); 439 440static struct attribute *typec_altmode_attrs[] = { 441 &dev_attr_active.attr, 442 &dev_attr_mode.attr, 443 &dev_attr_svid.attr, 444 &dev_attr_vdo.attr, 445 NULL 446}; 447 448static umode_t typec_altmode_attr_is_visible(struct kobject *kobj, 449 struct attribute *attr, int n) 450{ 451 struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj)); 452 453 if (attr == &dev_attr_active.attr) 454 if (!adev->ops || !adev->ops->activate) 455 return 0444; 456 457 return attr->mode; 458} 459 460static const struct attribute_group typec_altmode_group = { 461 .is_visible = typec_altmode_attr_is_visible, 462 .attrs = typec_altmode_attrs, 463}; 464 465static const struct attribute_group *typec_altmode_groups[] = { 466 &typec_altmode_group, 467 NULL 468}; 469 470static int altmode_id_get(struct device *dev) 471{ 472 struct ida *ids; 473 474 if (is_typec_partner(dev)) 475 ids = &to_typec_partner(dev)->mode_ids; 476 else if (is_typec_plug(dev)) 477 ids = &to_typec_plug(dev)->mode_ids; 478 else 479 ids = &to_typec_port(dev)->mode_ids; 480 481 return ida_alloc(ids, GFP_KERNEL); 482} 483 484static void altmode_id_remove(struct device *dev, int id) 485{ 486 struct ida *ids; 487 488 if (is_typec_partner(dev)) 489 ids = &to_typec_partner(dev)->mode_ids; 490 else if (is_typec_plug(dev)) 491 ids = &to_typec_plug(dev)->mode_ids; 492 else 493 ids = &to_typec_port(dev)->mode_ids; 494 495 ida_free(ids, id); 496} 497 498static void typec_altmode_release(struct device *dev) 499{ 500 struct altmode *alt = to_altmode(to_typec_altmode(dev)); 501 502 if (!is_typec_port(dev->parent)) 503 typec_altmode_put_partner(alt); 504 505 altmode_id_remove(alt->adev.dev.parent, alt->id); 506 kfree(alt); 507} 508 509const struct device_type typec_altmode_dev_type = { 510 .name = "typec_alternate_mode", 511 .groups = typec_altmode_groups, 512 .release = typec_altmode_release, 513}; 514 515static struct typec_altmode * 516typec_register_altmode(struct device *parent, 517 const struct typec_altmode_desc *desc) 518{ 519 unsigned int id = altmode_id_get(parent); 520 bool is_port = is_typec_port(parent); 521 struct altmode *alt; 522 int ret; 523 524 alt = kzalloc(sizeof(*alt), GFP_KERNEL); 525 if (!alt) { 526 altmode_id_remove(parent, id); 527 return ERR_PTR(-ENOMEM); 528 } 529 530 alt->adev.svid = desc->svid; 531 alt->adev.mode = desc->mode; 532 alt->adev.vdo = desc->vdo; 533 alt->roles = desc->roles; 534 alt->id = id; 535 536 alt->attrs[0] = &dev_attr_vdo.attr; 537 alt->attrs[1] = &dev_attr_description.attr; 538 alt->attrs[2] = &dev_attr_active.attr; 539 540 if (is_port) { 541 alt->attrs[3] = &dev_attr_supported_roles.attr; 542 alt->adev.active = true; /* Enabled by default */ 543 } 544 545 sprintf(alt->group_name, "mode%d", desc->mode); 546 alt->group.name = alt->group_name; 547 alt->group.attrs = alt->attrs; 548 alt->groups[0] = &alt->group; 549 550 alt->adev.dev.parent = parent; 551 alt->adev.dev.groups = alt->groups; 552 alt->adev.dev.type = &typec_altmode_dev_type; 553 dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id); 554 555 /* Link partners and plugs with the ports */ 556 if (!is_port) 557 typec_altmode_set_partner(alt); 558 559 /* The partners are bind to drivers */ 560 if (is_typec_partner(parent)) 561 alt->adev.dev.bus = &typec_bus; 562 563 /* Plug alt modes need a class to generate udev events. */ 564 if (is_typec_plug(parent)) 565 alt->adev.dev.class = &typec_class; 566 567 ret = device_register(&alt->adev.dev); 568 if (ret) { 569 dev_err(parent, "failed to register alternate mode (%d)\n", 570 ret); 571 put_device(&alt->adev.dev); 572 return ERR_PTR(ret); 573 } 574 575 return &alt->adev; 576} 577 578/** 579 * typec_unregister_altmode - Unregister Alternate Mode 580 * @adev: The alternate mode to be unregistered 581 * 582 * Unregister device created with typec_partner_register_altmode(), 583 * typec_plug_register_altmode() or typec_port_register_altmode(). 584 */ 585void typec_unregister_altmode(struct typec_altmode *adev) 586{ 587 if (IS_ERR_OR_NULL(adev)) 588 return; 589 typec_retimer_put(to_altmode(adev)->retimer); 590 typec_mux_put(to_altmode(adev)->mux); 591 device_unregister(&adev->dev); 592} 593EXPORT_SYMBOL_GPL(typec_unregister_altmode); 594 595/* ------------------------------------------------------------------------- */ 596/* Type-C Partners */ 597 598static ssize_t accessory_mode_show(struct device *dev, 599 struct device_attribute *attr, 600 char *buf) 601{ 602 struct typec_partner *p = to_typec_partner(dev); 603 604 return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]); 605} 606static DEVICE_ATTR_RO(accessory_mode); 607 608static ssize_t supports_usb_power_delivery_show(struct device *dev, 609 struct device_attribute *attr, 610 char *buf) 611{ 612 struct typec_partner *p = to_typec_partner(dev); 613 614 return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no"); 615} 616static DEVICE_ATTR_RO(supports_usb_power_delivery); 617 618static ssize_t number_of_alternate_modes_show(struct device *dev, struct device_attribute *attr, 619 char *buf) 620{ 621 struct typec_partner *partner; 622 struct typec_plug *plug; 623 int num_altmodes; 624 625 if (is_typec_partner(dev)) { 626 partner = to_typec_partner(dev); 627 num_altmodes = partner->num_altmodes; 628 } else if (is_typec_plug(dev)) { 629 plug = to_typec_plug(dev); 630 num_altmodes = plug->num_altmodes; 631 } else { 632 return 0; 633 } 634 635 return sysfs_emit(buf, "%d\n", num_altmodes); 636} 637static DEVICE_ATTR_RO(number_of_alternate_modes); 638 639static struct attribute *typec_partner_attrs[] = { 640 &dev_attr_accessory_mode.attr, 641 &dev_attr_supports_usb_power_delivery.attr, 642 &dev_attr_number_of_alternate_modes.attr, 643 &dev_attr_type.attr, 644 &dev_attr_usb_power_delivery_revision.attr, 645 NULL 646}; 647 648static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 649{ 650 struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj)); 651 652 if (attr == &dev_attr_number_of_alternate_modes.attr) { 653 if (partner->num_altmodes < 0) 654 return 0; 655 } 656 657 if (attr == &dev_attr_type.attr) 658 if (!get_pd_product_type(kobj_to_dev(kobj))) 659 return 0; 660 661 return attr->mode; 662} 663 664static const struct attribute_group typec_partner_group = { 665 .is_visible = typec_partner_attr_is_visible, 666 .attrs = typec_partner_attrs 667}; 668 669static const struct attribute_group *typec_partner_groups[] = { 670 &typec_partner_group, 671 NULL 672}; 673 674static void typec_partner_release(struct device *dev) 675{ 676 struct typec_partner *partner = to_typec_partner(dev); 677 678 ida_destroy(&partner->mode_ids); 679 kfree(partner); 680} 681 682const struct device_type typec_partner_dev_type = { 683 .name = "typec_partner", 684 .groups = typec_partner_groups, 685 .release = typec_partner_release, 686}; 687 688static void typec_partner_link_device(struct typec_partner *partner, struct device *dev) 689{ 690 int ret; 691 692 ret = sysfs_create_link(&dev->kobj, &partner->dev.kobj, "typec"); 693 if (ret) 694 return; 695 696 ret = sysfs_create_link(&partner->dev.kobj, &dev->kobj, dev_name(dev)); 697 if (ret) { 698 sysfs_remove_link(&dev->kobj, "typec"); 699 return; 700 } 701 702 if (partner->attach) 703 partner->attach(partner, dev); 704} 705 706static void typec_partner_unlink_device(struct typec_partner *partner, struct device *dev) 707{ 708 sysfs_remove_link(&partner->dev.kobj, dev_name(dev)); 709 sysfs_remove_link(&dev->kobj, "typec"); 710 711 if (partner->deattach) 712 partner->deattach(partner, dev); 713} 714 715/** 716 * typec_partner_set_identity - Report result from Discover Identity command 717 * @partner: The partner updated identity values 718 * 719 * This routine is used to report that the result of Discover Identity USB power 720 * delivery command has become available. 721 */ 722int typec_partner_set_identity(struct typec_partner *partner) 723{ 724 if (!partner->identity) 725 return -EINVAL; 726 727 typec_report_identity(&partner->dev); 728 return 0; 729} 730EXPORT_SYMBOL_GPL(typec_partner_set_identity); 731 732/** 733 * typec_partner_set_pd_revision - Set the PD revision supported by the partner 734 * @partner: The partner to be updated. 735 * @pd_revision: USB Power Delivery Specification Revision supported by partner 736 * 737 * This routine is used to report that the PD revision of the port partner has 738 * become available. 739 */ 740void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision) 741{ 742 if (partner->pd_revision == pd_revision) 743 return; 744 745 partner->pd_revision = pd_revision; 746 sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision"); 747 if (pd_revision != 0 && !partner->usb_pd) { 748 partner->usb_pd = 1; 749 sysfs_notify(&partner->dev.kobj, NULL, 750 "supports_usb_power_delivery"); 751 } 752 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 753} 754EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision); 755 756/** 757 * typec_partner_set_usb_power_delivery - Declare USB Power Delivery Contract. 758 * @partner: The partner device. 759 * @pd: The USB PD instance. 760 * 761 * This routine can be used to declare USB Power Delivery Contract with @partner 762 * by linking @partner to @pd which contains the objects that were used during the 763 * negotiation of the contract. 764 * 765 * If @pd is NULL, the link is removed and the contract with @partner has ended. 766 */ 767int typec_partner_set_usb_power_delivery(struct typec_partner *partner, 768 struct usb_power_delivery *pd) 769{ 770 int ret; 771 772 if (IS_ERR_OR_NULL(partner) || partner->pd == pd) 773 return 0; 774 775 if (pd) { 776 ret = usb_power_delivery_link_device(pd, &partner->dev); 777 if (ret) 778 return ret; 779 } else { 780 usb_power_delivery_unlink_device(partner->pd, &partner->dev); 781 } 782 783 partner->pd = pd; 784 785 return 0; 786} 787EXPORT_SYMBOL_GPL(typec_partner_set_usb_power_delivery); 788 789/** 790 * typec_partner_set_num_altmodes - Set the number of available partner altmodes 791 * @partner: The partner to be updated. 792 * @num_altmodes: The number of altmodes we want to specify as available. 793 * 794 * This routine is used to report the number of alternate modes supported by the 795 * partner. This value is *not* enforced in alternate mode registration routines. 796 * 797 * @partner.num_altmodes is set to -1 on partner registration, denoting that 798 * a valid value has not been set for it yet. 799 * 800 * Returns 0 on success or negative error number on failure. 801 */ 802int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes) 803{ 804 int ret; 805 806 if (num_altmodes < 0) 807 return -EINVAL; 808 809 partner->num_altmodes = num_altmodes; 810 ret = sysfs_update_group(&partner->dev.kobj, &typec_partner_group); 811 if (ret < 0) 812 return ret; 813 814 sysfs_notify(&partner->dev.kobj, NULL, "number_of_alternate_modes"); 815 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 816 817 return 0; 818} 819EXPORT_SYMBOL_GPL(typec_partner_set_num_altmodes); 820 821/** 822 * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode 823 * @partner: USB Type-C Partner that supports the alternate mode 824 * @desc: Description of the alternate mode 825 * 826 * This routine is used to register each alternate mode individually that 827 * @partner has listed in response to Discover SVIDs command. The modes for a 828 * SVID listed in response to Discover Modes command need to be listed in an 829 * array in @desc. 830 * 831 * Returns handle to the alternate mode on success or ERR_PTR on failure. 832 */ 833struct typec_altmode * 834typec_partner_register_altmode(struct typec_partner *partner, 835 const struct typec_altmode_desc *desc) 836{ 837 return typec_register_altmode(&partner->dev, desc); 838} 839EXPORT_SYMBOL_GPL(typec_partner_register_altmode); 840 841/** 842 * typec_partner_set_svdm_version - Set negotiated Structured VDM (SVDM) Version 843 * @partner: USB Type-C Partner that supports SVDM 844 * @svdm_version: Negotiated SVDM Version 845 * 846 * This routine is used to save the negotiated SVDM Version. 847 */ 848void typec_partner_set_svdm_version(struct typec_partner *partner, 849 enum usb_pd_svdm_ver svdm_version) 850{ 851 partner->svdm_version = svdm_version; 852} 853EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version); 854 855/** 856 * typec_partner_usb_power_delivery_register - Register Type-C partner USB Power Delivery Support 857 * @partner: Type-C partner device. 858 * @desc: Description of the USB PD contract. 859 * 860 * This routine is a wrapper around usb_power_delivery_register(). It registers 861 * USB Power Delivery Capabilities for a Type-C partner device. Specifically, 862 * it sets the Type-C partner device as a parent for the resulting USB Power Delivery object. 863 * 864 * Returns handle to struct usb_power_delivery or ERR_PTR. 865 */ 866struct usb_power_delivery * 867typec_partner_usb_power_delivery_register(struct typec_partner *partner, 868 struct usb_power_delivery_desc *desc) 869{ 870 return usb_power_delivery_register(&partner->dev, desc); 871} 872EXPORT_SYMBOL_GPL(typec_partner_usb_power_delivery_register); 873 874/** 875 * typec_register_partner - Register a USB Type-C Partner 876 * @port: The USB Type-C Port the partner is connected to 877 * @desc: Description of the partner 878 * 879 * Registers a device for USB Type-C Partner described in @desc. 880 * 881 * Returns handle to the partner on success or ERR_PTR on failure. 882 */ 883struct typec_partner *typec_register_partner(struct typec_port *port, 884 struct typec_partner_desc *desc) 885{ 886 struct typec_partner *partner; 887 int ret; 888 889 partner = kzalloc(sizeof(*partner), GFP_KERNEL); 890 if (!partner) 891 return ERR_PTR(-ENOMEM); 892 893 ida_init(&partner->mode_ids); 894 partner->usb_pd = desc->usb_pd; 895 partner->accessory = desc->accessory; 896 partner->num_altmodes = -1; 897 partner->pd_revision = desc->pd_revision; 898 partner->svdm_version = port->cap->svdm_version; 899 partner->attach = desc->attach; 900 partner->deattach = desc->deattach; 901 902 if (desc->identity) { 903 /* 904 * Creating directory for the identity only if the driver is 905 * able to provide data to it. 906 */ 907 partner->dev.groups = usb_pd_id_groups; 908 partner->identity = desc->identity; 909 } 910 911 partner->dev.class = &typec_class; 912 partner->dev.parent = &port->dev; 913 partner->dev.type = &typec_partner_dev_type; 914 dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev)); 915 916 ret = device_register(&partner->dev); 917 if (ret) { 918 dev_err(&port->dev, "failed to register partner (%d)\n", ret); 919 put_device(&partner->dev); 920 return ERR_PTR(ret); 921 } 922 923 if (port->usb2_dev) 924 typec_partner_link_device(partner, port->usb2_dev); 925 if (port->usb3_dev) 926 typec_partner_link_device(partner, port->usb3_dev); 927 928 return partner; 929} 930EXPORT_SYMBOL_GPL(typec_register_partner); 931 932/** 933 * typec_unregister_partner - Unregister a USB Type-C Partner 934 * @partner: The partner to be unregistered 935 * 936 * Unregister device created with typec_register_partner(). 937 */ 938void typec_unregister_partner(struct typec_partner *partner) 939{ 940 struct typec_port *port; 941 942 if (IS_ERR_OR_NULL(partner)) 943 return; 944 945 port = to_typec_port(partner->dev.parent); 946 947 if (port->usb2_dev) 948 typec_partner_unlink_device(partner, port->usb2_dev); 949 if (port->usb3_dev) 950 typec_partner_unlink_device(partner, port->usb3_dev); 951 952 device_unregister(&partner->dev); 953} 954EXPORT_SYMBOL_GPL(typec_unregister_partner); 955 956/* ------------------------------------------------------------------------- */ 957/* Type-C Cable Plugs */ 958 959static void typec_plug_release(struct device *dev) 960{ 961 struct typec_plug *plug = to_typec_plug(dev); 962 963 ida_destroy(&plug->mode_ids); 964 kfree(plug); 965} 966 967static struct attribute *typec_plug_attrs[] = { 968 &dev_attr_number_of_alternate_modes.attr, 969 NULL 970}; 971 972static umode_t typec_plug_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 973{ 974 struct typec_plug *plug = to_typec_plug(kobj_to_dev(kobj)); 975 976 if (attr == &dev_attr_number_of_alternate_modes.attr) { 977 if (plug->num_altmodes < 0) 978 return 0; 979 } 980 981 return attr->mode; 982} 983 984static const struct attribute_group typec_plug_group = { 985 .is_visible = typec_plug_attr_is_visible, 986 .attrs = typec_plug_attrs 987}; 988 989static const struct attribute_group *typec_plug_groups[] = { 990 &typec_plug_group, 991 NULL 992}; 993 994const struct device_type typec_plug_dev_type = { 995 .name = "typec_plug", 996 .groups = typec_plug_groups, 997 .release = typec_plug_release, 998}; 999 1000/** 1001 * typec_plug_set_num_altmodes - Set the number of available plug altmodes 1002 * @plug: The plug to be updated. 1003 * @num_altmodes: The number of altmodes we want to specify as available. 1004 * 1005 * This routine is used to report the number of alternate modes supported by the 1006 * plug. This value is *not* enforced in alternate mode registration routines. 1007 * 1008 * @plug.num_altmodes is set to -1 on plug registration, denoting that 1009 * a valid value has not been set for it yet. 1010 * 1011 * Returns 0 on success or negative error number on failure. 1012 */ 1013int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes) 1014{ 1015 int ret; 1016 1017 if (num_altmodes < 0) 1018 return -EINVAL; 1019 1020 plug->num_altmodes = num_altmodes; 1021 ret = sysfs_update_group(&plug->dev.kobj, &typec_plug_group); 1022 if (ret < 0) 1023 return ret; 1024 1025 sysfs_notify(&plug->dev.kobj, NULL, "number_of_alternate_modes"); 1026 kobject_uevent(&plug->dev.kobj, KOBJ_CHANGE); 1027 1028 return 0; 1029} 1030EXPORT_SYMBOL_GPL(typec_plug_set_num_altmodes); 1031 1032/** 1033 * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode 1034 * @plug: USB Type-C Cable Plug that supports the alternate mode 1035 * @desc: Description of the alternate mode 1036 * 1037 * This routine is used to register each alternate mode individually that @plug 1038 * has listed in response to Discover SVIDs command. The modes for a SVID that 1039 * the plug lists in response to Discover Modes command need to be listed in an 1040 * array in @desc. 1041 * 1042 * Returns handle to the alternate mode on success or ERR_PTR on failure. 1043 */ 1044struct typec_altmode * 1045typec_plug_register_altmode(struct typec_plug *plug, 1046 const struct typec_altmode_desc *desc) 1047{ 1048 return typec_register_altmode(&plug->dev, desc); 1049} 1050EXPORT_SYMBOL_GPL(typec_plug_register_altmode); 1051 1052/** 1053 * typec_register_plug - Register a USB Type-C Cable Plug 1054 * @cable: USB Type-C Cable with the plug 1055 * @desc: Description of the cable plug 1056 * 1057 * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C 1058 * Cable Plug represents a plug with electronics in it that can response to USB 1059 * Power Delivery SOP Prime or SOP Double Prime packages. 1060 * 1061 * Returns handle to the cable plug on success or ERR_PTR on failure. 1062 */ 1063struct typec_plug *typec_register_plug(struct typec_cable *cable, 1064 struct typec_plug_desc *desc) 1065{ 1066 struct typec_plug *plug; 1067 char name[8]; 1068 int ret; 1069 1070 plug = kzalloc(sizeof(*plug), GFP_KERNEL); 1071 if (!plug) 1072 return ERR_PTR(-ENOMEM); 1073 1074 sprintf(name, "plug%d", desc->index); 1075 1076 ida_init(&plug->mode_ids); 1077 plug->num_altmodes = -1; 1078 plug->index = desc->index; 1079 plug->dev.class = &typec_class; 1080 plug->dev.parent = &cable->dev; 1081 plug->dev.type = &typec_plug_dev_type; 1082 dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name); 1083 1084 ret = device_register(&plug->dev); 1085 if (ret) { 1086 dev_err(&cable->dev, "failed to register plug (%d)\n", ret); 1087 put_device(&plug->dev); 1088 return ERR_PTR(ret); 1089 } 1090 1091 return plug; 1092} 1093EXPORT_SYMBOL_GPL(typec_register_plug); 1094 1095/** 1096 * typec_unregister_plug - Unregister a USB Type-C Cable Plug 1097 * @plug: The cable plug to be unregistered 1098 * 1099 * Unregister device created with typec_register_plug(). 1100 */ 1101void typec_unregister_plug(struct typec_plug *plug) 1102{ 1103 if (!IS_ERR_OR_NULL(plug)) 1104 device_unregister(&plug->dev); 1105} 1106EXPORT_SYMBOL_GPL(typec_unregister_plug); 1107 1108/* Type-C Cables */ 1109 1110static const char * const typec_plug_types[] = { 1111 [USB_PLUG_NONE] = "unknown", 1112 [USB_PLUG_TYPE_A] = "type-a", 1113 [USB_PLUG_TYPE_B] = "type-b", 1114 [USB_PLUG_TYPE_C] = "type-c", 1115 [USB_PLUG_CAPTIVE] = "captive", 1116}; 1117 1118static ssize_t plug_type_show(struct device *dev, 1119 struct device_attribute *attr, char *buf) 1120{ 1121 struct typec_cable *cable = to_typec_cable(dev); 1122 1123 return sprintf(buf, "%s\n", typec_plug_types[cable->type]); 1124} 1125static DEVICE_ATTR_RO(plug_type); 1126 1127static struct attribute *typec_cable_attrs[] = { 1128 &dev_attr_type.attr, 1129 &dev_attr_plug_type.attr, 1130 &dev_attr_usb_power_delivery_revision.attr, 1131 NULL 1132}; 1133ATTRIBUTE_GROUPS(typec_cable); 1134 1135static void typec_cable_release(struct device *dev) 1136{ 1137 struct typec_cable *cable = to_typec_cable(dev); 1138 1139 kfree(cable); 1140} 1141 1142const struct device_type typec_cable_dev_type = { 1143 .name = "typec_cable", 1144 .groups = typec_cable_groups, 1145 .release = typec_cable_release, 1146}; 1147 1148static int cable_match(struct device *dev, void *data) 1149{ 1150 return is_typec_cable(dev); 1151} 1152 1153/** 1154 * typec_cable_get - Get a reference to the USB Type-C cable 1155 * @port: The USB Type-C Port the cable is connected to 1156 * 1157 * The caller must decrement the reference count with typec_cable_put() after 1158 * use. 1159 */ 1160struct typec_cable *typec_cable_get(struct typec_port *port) 1161{ 1162 struct device *dev; 1163 1164 dev = device_find_child(&port->dev, NULL, cable_match); 1165 if (!dev) 1166 return NULL; 1167 1168 return to_typec_cable(dev); 1169} 1170EXPORT_SYMBOL_GPL(typec_cable_get); 1171 1172/** 1173 * typec_cable_put - Decrement the reference count on USB Type-C cable 1174 * @cable: The USB Type-C cable 1175 */ 1176void typec_cable_put(struct typec_cable *cable) 1177{ 1178 put_device(&cable->dev); 1179} 1180EXPORT_SYMBOL_GPL(typec_cable_put); 1181 1182/** 1183 * typec_cable_is_active - Check is the USB Type-C cable active or passive 1184 * @cable: The USB Type-C Cable 1185 * 1186 * Return 1 if the cable is active or 0 if it's passive. 1187 */ 1188int typec_cable_is_active(struct typec_cable *cable) 1189{ 1190 return cable->active; 1191} 1192EXPORT_SYMBOL_GPL(typec_cable_is_active); 1193 1194/** 1195 * typec_cable_set_identity - Report result from Discover Identity command 1196 * @cable: The cable updated identity values 1197 * 1198 * This routine is used to report that the result of Discover Identity USB power 1199 * delivery command has become available. 1200 */ 1201int typec_cable_set_identity(struct typec_cable *cable) 1202{ 1203 if (!cable->identity) 1204 return -EINVAL; 1205 1206 typec_report_identity(&cable->dev); 1207 return 0; 1208} 1209EXPORT_SYMBOL_GPL(typec_cable_set_identity); 1210 1211/** 1212 * typec_register_cable - Register a USB Type-C Cable 1213 * @port: The USB Type-C Port the cable is connected to 1214 * @desc: Description of the cable 1215 * 1216 * Registers a device for USB Type-C Cable described in @desc. The cable will be 1217 * parent for the optional cable plug devises. 1218 * 1219 * Returns handle to the cable on success or ERR_PTR on failure. 1220 */ 1221struct typec_cable *typec_register_cable(struct typec_port *port, 1222 struct typec_cable_desc *desc) 1223{ 1224 struct typec_cable *cable; 1225 int ret; 1226 1227 cable = kzalloc(sizeof(*cable), GFP_KERNEL); 1228 if (!cable) 1229 return ERR_PTR(-ENOMEM); 1230 1231 cable->type = desc->type; 1232 cable->active = desc->active; 1233 cable->pd_revision = desc->pd_revision; 1234 1235 if (desc->identity) { 1236 /* 1237 * Creating directory for the identity only if the driver is 1238 * able to provide data to it. 1239 */ 1240 cable->dev.groups = usb_pd_id_groups; 1241 cable->identity = desc->identity; 1242 } 1243 1244 cable->dev.class = &typec_class; 1245 cable->dev.parent = &port->dev; 1246 cable->dev.type = &typec_cable_dev_type; 1247 dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev)); 1248 1249 ret = device_register(&cable->dev); 1250 if (ret) { 1251 dev_err(&port->dev, "failed to register cable (%d)\n", ret); 1252 put_device(&cable->dev); 1253 return ERR_PTR(ret); 1254 } 1255 1256 return cable; 1257} 1258EXPORT_SYMBOL_GPL(typec_register_cable); 1259 1260/** 1261 * typec_unregister_cable - Unregister a USB Type-C Cable 1262 * @cable: The cable to be unregistered 1263 * 1264 * Unregister device created with typec_register_cable(). 1265 */ 1266void typec_unregister_cable(struct typec_cable *cable) 1267{ 1268 if (!IS_ERR_OR_NULL(cable)) 1269 device_unregister(&cable->dev); 1270} 1271EXPORT_SYMBOL_GPL(typec_unregister_cable); 1272 1273/* ------------------------------------------------------------------------- */ 1274/* USB Type-C ports */ 1275 1276/** 1277 * typec_port_set_usb_power_delivery - Assign USB PD for port. 1278 * @port: USB Type-C port. 1279 * @pd: USB PD instance. 1280 * 1281 * This routine can be used to set the USB Power Delivery Capabilities for @port 1282 * that it will advertise to the partner. 1283 * 1284 * If @pd is NULL, the assignment is removed. 1285 */ 1286int typec_port_set_usb_power_delivery(struct typec_port *port, struct usb_power_delivery *pd) 1287{ 1288 int ret; 1289 1290 if (IS_ERR_OR_NULL(port) || port->pd == pd) 1291 return 0; 1292 1293 if (pd) { 1294 ret = usb_power_delivery_link_device(pd, &port->dev); 1295 if (ret) 1296 return ret; 1297 } else { 1298 usb_power_delivery_unlink_device(port->pd, &port->dev); 1299 } 1300 1301 port->pd = pd; 1302 1303 return 0; 1304} 1305EXPORT_SYMBOL_GPL(typec_port_set_usb_power_delivery); 1306 1307static ssize_t select_usb_power_delivery_store(struct device *dev, 1308 struct device_attribute *attr, 1309 const char *buf, size_t size) 1310{ 1311 struct typec_port *port = to_typec_port(dev); 1312 struct usb_power_delivery *pd; 1313 int ret; 1314 1315 if (!port->ops || !port->ops->pd_set) 1316 return -EOPNOTSUPP; 1317 1318 pd = usb_power_delivery_find(buf); 1319 if (!pd) 1320 return -EINVAL; 1321 1322 ret = port->ops->pd_set(port, pd); 1323 if (ret) 1324 return ret; 1325 1326 return size; 1327} 1328 1329static ssize_t select_usb_power_delivery_show(struct device *dev, 1330 struct device_attribute *attr, char *buf) 1331{ 1332 struct typec_port *port = to_typec_port(dev); 1333 struct usb_power_delivery **pds; 1334 int i, ret = 0; 1335 1336 if (!port->ops || !port->ops->pd_get) 1337 return -EOPNOTSUPP; 1338 1339 pds = port->ops->pd_get(port); 1340 if (!pds) 1341 return 0; 1342 1343 for (i = 0; pds[i]; i++) { 1344 if (pds[i] == port->pd) 1345 ret += sysfs_emit_at(buf, ret, "[%s] ", dev_name(&pds[i]->dev)); 1346 else 1347 ret += sysfs_emit_at(buf, ret, "%s ", dev_name(&pds[i]->dev)); 1348 } 1349 1350 buf[ret - 1] = '\n'; 1351 1352 return ret; 1353} 1354static DEVICE_ATTR_RW(select_usb_power_delivery); 1355 1356static struct attribute *port_attrs[] = { 1357 &dev_attr_select_usb_power_delivery.attr, 1358 NULL 1359}; 1360 1361static umode_t port_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 1362{ 1363 struct typec_port *port = to_typec_port(kobj_to_dev(kobj)); 1364 1365 if (!port->pd || !port->ops || !port->ops->pd_get) 1366 return 0; 1367 if (!port->ops->pd_set) 1368 return 0444; 1369 1370 return attr->mode; 1371} 1372 1373static const struct attribute_group pd_group = { 1374 .is_visible = port_attr_is_visible, 1375 .attrs = port_attrs, 1376}; 1377 1378static const char * const typec_orientations[] = { 1379 [TYPEC_ORIENTATION_NONE] = "unknown", 1380 [TYPEC_ORIENTATION_NORMAL] = "normal", 1381 [TYPEC_ORIENTATION_REVERSE] = "reverse", 1382}; 1383 1384static const char * const typec_roles[] = { 1385 [TYPEC_SINK] = "sink", 1386 [TYPEC_SOURCE] = "source", 1387}; 1388 1389static const char * const typec_data_roles[] = { 1390 [TYPEC_DEVICE] = "device", 1391 [TYPEC_HOST] = "host", 1392}; 1393 1394static const char * const typec_port_power_roles[] = { 1395 [TYPEC_PORT_SRC] = "source", 1396 [TYPEC_PORT_SNK] = "sink", 1397 [TYPEC_PORT_DRP] = "dual", 1398}; 1399 1400static const char * const typec_port_data_roles[] = { 1401 [TYPEC_PORT_DFP] = "host", 1402 [TYPEC_PORT_UFP] = "device", 1403 [TYPEC_PORT_DRD] = "dual", 1404}; 1405 1406static const char * const typec_port_types_drp[] = { 1407 [TYPEC_PORT_SRC] = "dual [source] sink", 1408 [TYPEC_PORT_SNK] = "dual source [sink]", 1409 [TYPEC_PORT_DRP] = "[dual] source sink", 1410}; 1411 1412static ssize_t 1413preferred_role_store(struct device *dev, struct device_attribute *attr, 1414 const char *buf, size_t size) 1415{ 1416 struct typec_port *port = to_typec_port(dev); 1417 int role; 1418 int ret; 1419 1420 if (port->cap->type != TYPEC_PORT_DRP) { 1421 dev_dbg(dev, "Preferred role only supported with DRP ports\n"); 1422 return -EOPNOTSUPP; 1423 } 1424 1425 if (!port->ops || !port->ops->try_role) { 1426 dev_dbg(dev, "Setting preferred role not supported\n"); 1427 return -EOPNOTSUPP; 1428 } 1429 1430 role = sysfs_match_string(typec_roles, buf); 1431 if (role < 0) { 1432 if (sysfs_streq(buf, "none")) 1433 role = TYPEC_NO_PREFERRED_ROLE; 1434 else 1435 return -EINVAL; 1436 } 1437 1438 ret = port->ops->try_role(port, role); 1439 if (ret) 1440 return ret; 1441 1442 port->prefer_role = role; 1443 return size; 1444} 1445 1446static ssize_t 1447preferred_role_show(struct device *dev, struct device_attribute *attr, 1448 char *buf) 1449{ 1450 struct typec_port *port = to_typec_port(dev); 1451 1452 if (port->cap->type != TYPEC_PORT_DRP) 1453 return 0; 1454 1455 if (port->prefer_role < 0) 1456 return 0; 1457 1458 return sprintf(buf, "%s\n", typec_roles[port->prefer_role]); 1459} 1460static DEVICE_ATTR_RW(preferred_role); 1461 1462static ssize_t data_role_store(struct device *dev, 1463 struct device_attribute *attr, 1464 const char *buf, size_t size) 1465{ 1466 struct typec_port *port = to_typec_port(dev); 1467 int ret; 1468 1469 if (!port->ops || !port->ops->dr_set) { 1470 dev_dbg(dev, "data role swapping not supported\n"); 1471 return -EOPNOTSUPP; 1472 } 1473 1474 ret = sysfs_match_string(typec_data_roles, buf); 1475 if (ret < 0) 1476 return ret; 1477 1478 mutex_lock(&port->port_type_lock); 1479 if (port->cap->data != TYPEC_PORT_DRD) { 1480 ret = -EOPNOTSUPP; 1481 goto unlock_and_ret; 1482 } 1483 1484 ret = port->ops->dr_set(port, ret); 1485 if (ret) 1486 goto unlock_and_ret; 1487 1488 ret = size; 1489unlock_and_ret: 1490 mutex_unlock(&port->port_type_lock); 1491 return ret; 1492} 1493 1494static ssize_t data_role_show(struct device *dev, 1495 struct device_attribute *attr, char *buf) 1496{ 1497 struct typec_port *port = to_typec_port(dev); 1498 1499 if (port->cap->data == TYPEC_PORT_DRD) 1500 return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ? 1501 "[host] device" : "host [device]"); 1502 1503 return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]); 1504} 1505static DEVICE_ATTR_RW(data_role); 1506 1507static ssize_t power_role_store(struct device *dev, 1508 struct device_attribute *attr, 1509 const char *buf, size_t size) 1510{ 1511 struct typec_port *port = to_typec_port(dev); 1512 int ret; 1513 1514 if (!port->ops || !port->ops->pr_set) { 1515 dev_dbg(dev, "power role swapping not supported\n"); 1516 return -EOPNOTSUPP; 1517 } 1518 1519 if (port->pwr_opmode != TYPEC_PWR_MODE_PD) { 1520 dev_dbg(dev, "partner unable to swap power role\n"); 1521 return -EIO; 1522 } 1523 1524 ret = sysfs_match_string(typec_roles, buf); 1525 if (ret < 0) 1526 return ret; 1527 1528 mutex_lock(&port->port_type_lock); 1529 if (port->port_type != TYPEC_PORT_DRP) { 1530 dev_dbg(dev, "port type fixed at \"%s\"", 1531 typec_port_power_roles[port->port_type]); 1532 ret = -EOPNOTSUPP; 1533 goto unlock_and_ret; 1534 } 1535 1536 ret = port->ops->pr_set(port, ret); 1537 if (ret) 1538 goto unlock_and_ret; 1539 1540 ret = size; 1541unlock_and_ret: 1542 mutex_unlock(&port->port_type_lock); 1543 return ret; 1544} 1545 1546static ssize_t power_role_show(struct device *dev, 1547 struct device_attribute *attr, char *buf) 1548{ 1549 struct typec_port *port = to_typec_port(dev); 1550 1551 if (port->cap->type == TYPEC_PORT_DRP) 1552 return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ? 1553 "[source] sink" : "source [sink]"); 1554 1555 return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]); 1556} 1557static DEVICE_ATTR_RW(power_role); 1558 1559static ssize_t 1560port_type_store(struct device *dev, struct device_attribute *attr, 1561 const char *buf, size_t size) 1562{ 1563 struct typec_port *port = to_typec_port(dev); 1564 int ret; 1565 enum typec_port_type type; 1566 1567 if (port->cap->type != TYPEC_PORT_DRP || 1568 !port->ops || !port->ops->port_type_set) { 1569 dev_dbg(dev, "changing port type not supported\n"); 1570 return -EOPNOTSUPP; 1571 } 1572 1573 ret = sysfs_match_string(typec_port_power_roles, buf); 1574 if (ret < 0) 1575 return ret; 1576 1577 type = ret; 1578 mutex_lock(&port->port_type_lock); 1579 1580 if (port->port_type == type) { 1581 ret = size; 1582 goto unlock_and_ret; 1583 } 1584 1585 ret = port->ops->port_type_set(port, type); 1586 if (ret) 1587 goto unlock_and_ret; 1588 1589 port->port_type = type; 1590 ret = size; 1591 1592unlock_and_ret: 1593 mutex_unlock(&port->port_type_lock); 1594 return ret; 1595} 1596 1597static ssize_t 1598port_type_show(struct device *dev, struct device_attribute *attr, 1599 char *buf) 1600{ 1601 struct typec_port *port = to_typec_port(dev); 1602 1603 if (port->cap->type == TYPEC_PORT_DRP) 1604 return sprintf(buf, "%s\n", 1605 typec_port_types_drp[port->port_type]); 1606 1607 return sprintf(buf, "[%s]\n", typec_port_power_roles[port->cap->type]); 1608} 1609static DEVICE_ATTR_RW(port_type); 1610 1611static const char * const typec_pwr_opmodes[] = { 1612 [TYPEC_PWR_MODE_USB] = "default", 1613 [TYPEC_PWR_MODE_1_5A] = "1.5A", 1614 [TYPEC_PWR_MODE_3_0A] = "3.0A", 1615 [TYPEC_PWR_MODE_PD] = "usb_power_delivery", 1616}; 1617 1618static ssize_t power_operation_mode_show(struct device *dev, 1619 struct device_attribute *attr, 1620 char *buf) 1621{ 1622 struct typec_port *port = to_typec_port(dev); 1623 1624 return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]); 1625} 1626static DEVICE_ATTR_RO(power_operation_mode); 1627 1628static ssize_t vconn_source_store(struct device *dev, 1629 struct device_attribute *attr, 1630 const char *buf, size_t size) 1631{ 1632 struct typec_port *port = to_typec_port(dev); 1633 bool source; 1634 int ret; 1635 1636 if (!port->cap->pd_revision) { 1637 dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n"); 1638 return -EOPNOTSUPP; 1639 } 1640 1641 if (!port->ops || !port->ops->vconn_set) { 1642 dev_dbg(dev, "VCONN swapping not supported\n"); 1643 return -EOPNOTSUPP; 1644 } 1645 1646 ret = kstrtobool(buf, &source); 1647 if (ret) 1648 return ret; 1649 1650 ret = port->ops->vconn_set(port, (enum typec_role)source); 1651 if (ret) 1652 return ret; 1653 1654 return size; 1655} 1656 1657static ssize_t vconn_source_show(struct device *dev, 1658 struct device_attribute *attr, char *buf) 1659{ 1660 struct typec_port *port = to_typec_port(dev); 1661 1662 return sprintf(buf, "%s\n", 1663 port->vconn_role == TYPEC_SOURCE ? "yes" : "no"); 1664} 1665static DEVICE_ATTR_RW(vconn_source); 1666 1667static ssize_t supported_accessory_modes_show(struct device *dev, 1668 struct device_attribute *attr, 1669 char *buf) 1670{ 1671 struct typec_port *port = to_typec_port(dev); 1672 ssize_t ret = 0; 1673 int i; 1674 1675 for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) { 1676 if (port->cap->accessory[i]) 1677 ret += sprintf(buf + ret, "%s ", 1678 typec_accessory_modes[port->cap->accessory[i]]); 1679 } 1680 1681 if (!ret) 1682 return sprintf(buf, "none\n"); 1683 1684 buf[ret - 1] = '\n'; 1685 1686 return ret; 1687} 1688static DEVICE_ATTR_RO(supported_accessory_modes); 1689 1690static ssize_t usb_typec_revision_show(struct device *dev, 1691 struct device_attribute *attr, 1692 char *buf) 1693{ 1694 struct typec_port *port = to_typec_port(dev); 1695 u16 rev = port->cap->revision; 1696 1697 return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1698} 1699static DEVICE_ATTR_RO(usb_typec_revision); 1700 1701static ssize_t usb_power_delivery_revision_show(struct device *dev, 1702 struct device_attribute *attr, 1703 char *buf) 1704{ 1705 u16 rev = 0; 1706 1707 if (is_typec_partner(dev)) { 1708 struct typec_partner *partner = to_typec_partner(dev); 1709 1710 rev = partner->pd_revision; 1711 } else if (is_typec_cable(dev)) { 1712 struct typec_cable *cable = to_typec_cable(dev); 1713 1714 rev = cable->pd_revision; 1715 } else if (is_typec_port(dev)) { 1716 struct typec_port *p = to_typec_port(dev); 1717 1718 rev = p->cap->pd_revision; 1719 } 1720 return sysfs_emit(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1721} 1722 1723static ssize_t orientation_show(struct device *dev, 1724 struct device_attribute *attr, 1725 char *buf) 1726{ 1727 struct typec_port *port = to_typec_port(dev); 1728 1729 return sprintf(buf, "%s\n", typec_orientations[port->orientation]); 1730} 1731static DEVICE_ATTR_RO(orientation); 1732 1733static struct attribute *typec_attrs[] = { 1734 &dev_attr_data_role.attr, 1735 &dev_attr_power_operation_mode.attr, 1736 &dev_attr_power_role.attr, 1737 &dev_attr_preferred_role.attr, 1738 &dev_attr_supported_accessory_modes.attr, 1739 &dev_attr_usb_power_delivery_revision.attr, 1740 &dev_attr_usb_typec_revision.attr, 1741 &dev_attr_vconn_source.attr, 1742 &dev_attr_port_type.attr, 1743 &dev_attr_orientation.attr, 1744 NULL, 1745}; 1746 1747static umode_t typec_attr_is_visible(struct kobject *kobj, 1748 struct attribute *attr, int n) 1749{ 1750 struct typec_port *port = to_typec_port(kobj_to_dev(kobj)); 1751 1752 if (attr == &dev_attr_data_role.attr) { 1753 if (port->cap->data != TYPEC_PORT_DRD || 1754 !port->ops || !port->ops->dr_set) 1755 return 0444; 1756 } else if (attr == &dev_attr_power_role.attr) { 1757 if (port->cap->type != TYPEC_PORT_DRP || 1758 !port->ops || !port->ops->pr_set) 1759 return 0444; 1760 } else if (attr == &dev_attr_vconn_source.attr) { 1761 if (!port->cap->pd_revision || 1762 !port->ops || !port->ops->vconn_set) 1763 return 0444; 1764 } else if (attr == &dev_attr_preferred_role.attr) { 1765 if (port->cap->type != TYPEC_PORT_DRP || 1766 !port->ops || !port->ops->try_role) 1767 return 0444; 1768 } else if (attr == &dev_attr_port_type.attr) { 1769 if (!port->ops || !port->ops->port_type_set) 1770 return 0; 1771 if (port->cap->type != TYPEC_PORT_DRP) 1772 return 0444; 1773 } else if (attr == &dev_attr_orientation.attr) { 1774 if (port->cap->orientation_aware) 1775 return 0444; 1776 return 0; 1777 } 1778 1779 return attr->mode; 1780} 1781 1782static const struct attribute_group typec_group = { 1783 .is_visible = typec_attr_is_visible, 1784 .attrs = typec_attrs, 1785}; 1786 1787static const struct attribute_group *typec_groups[] = { 1788 &typec_group, 1789 &pd_group, 1790 NULL 1791}; 1792 1793static int typec_uevent(const struct device *dev, struct kobj_uevent_env *env) 1794{ 1795 int ret; 1796 1797 ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev)); 1798 if (ret) 1799 dev_err(dev, "failed to add uevent TYPEC_PORT\n"); 1800 1801 return ret; 1802} 1803 1804static void typec_release(struct device *dev) 1805{ 1806 struct typec_port *port = to_typec_port(dev); 1807 1808 ida_free(&typec_index_ida, port->id); 1809 ida_destroy(&port->mode_ids); 1810 typec_switch_put(port->sw); 1811 typec_mux_put(port->mux); 1812 typec_retimer_put(port->retimer); 1813 kfree(port->cap); 1814 kfree(port); 1815} 1816 1817const struct device_type typec_port_dev_type = { 1818 .name = "typec_port", 1819 .groups = typec_groups, 1820 .uevent = typec_uevent, 1821 .release = typec_release, 1822}; 1823 1824/* --------------------------------------- */ 1825/* Driver callbacks to report role updates */ 1826 1827static int partner_match(struct device *dev, void *data) 1828{ 1829 return is_typec_partner(dev); 1830} 1831 1832static struct typec_partner *typec_get_partner(struct typec_port *port) 1833{ 1834 struct device *dev; 1835 1836 dev = device_find_child(&port->dev, NULL, partner_match); 1837 if (!dev) 1838 return NULL; 1839 1840 return to_typec_partner(dev); 1841} 1842 1843static void typec_partner_attach(struct typec_connector *con, struct device *dev) 1844{ 1845 struct typec_port *port = container_of(con, struct typec_port, con); 1846 struct typec_partner *partner = typec_get_partner(port); 1847 struct usb_device *udev = to_usb_device(dev); 1848 1849 if (udev->speed < USB_SPEED_SUPER) 1850 port->usb2_dev = dev; 1851 else 1852 port->usb3_dev = dev; 1853 1854 if (partner) { 1855 typec_partner_link_device(partner, dev); 1856 put_device(&partner->dev); 1857 } 1858} 1859 1860static void typec_partner_deattach(struct typec_connector *con, struct device *dev) 1861{ 1862 struct typec_port *port = container_of(con, struct typec_port, con); 1863 struct typec_partner *partner = typec_get_partner(port); 1864 1865 if (partner) { 1866 typec_partner_unlink_device(partner, dev); 1867 put_device(&partner->dev); 1868 } 1869 1870 if (port->usb2_dev == dev) 1871 port->usb2_dev = NULL; 1872 else if (port->usb3_dev == dev) 1873 port->usb3_dev = NULL; 1874} 1875 1876/** 1877 * typec_set_data_role - Report data role change 1878 * @port: The USB Type-C Port where the role was changed 1879 * @role: The new data role 1880 * 1881 * This routine is used by the port drivers to report data role changes. 1882 */ 1883void typec_set_data_role(struct typec_port *port, enum typec_data_role role) 1884{ 1885 struct typec_partner *partner; 1886 1887 if (port->data_role == role) 1888 return; 1889 1890 port->data_role = role; 1891 sysfs_notify(&port->dev.kobj, NULL, "data_role"); 1892 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1893 1894 partner = typec_get_partner(port); 1895 if (!partner) 1896 return; 1897 1898 if (partner->identity) 1899 typec_product_type_notify(&partner->dev); 1900 1901 put_device(&partner->dev); 1902} 1903EXPORT_SYMBOL_GPL(typec_set_data_role); 1904 1905/** 1906 * typec_set_pwr_role - Report power role change 1907 * @port: The USB Type-C Port where the role was changed 1908 * @role: The new data role 1909 * 1910 * This routine is used by the port drivers to report power role changes. 1911 */ 1912void typec_set_pwr_role(struct typec_port *port, enum typec_role role) 1913{ 1914 if (port->pwr_role == role) 1915 return; 1916 1917 port->pwr_role = role; 1918 sysfs_notify(&port->dev.kobj, NULL, "power_role"); 1919 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1920} 1921EXPORT_SYMBOL_GPL(typec_set_pwr_role); 1922 1923/** 1924 * typec_set_vconn_role - Report VCONN source change 1925 * @port: The USB Type-C Port which VCONN role changed 1926 * @role: Source when @port is sourcing VCONN, or Sink when it's not 1927 * 1928 * This routine is used by the port drivers to report if the VCONN source is 1929 * changes. 1930 */ 1931void typec_set_vconn_role(struct typec_port *port, enum typec_role role) 1932{ 1933 if (port->vconn_role == role) 1934 return; 1935 1936 port->vconn_role = role; 1937 sysfs_notify(&port->dev.kobj, NULL, "vconn_source"); 1938 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1939} 1940EXPORT_SYMBOL_GPL(typec_set_vconn_role); 1941 1942/** 1943 * typec_set_pwr_opmode - Report changed power operation mode 1944 * @port: The USB Type-C Port where the mode was changed 1945 * @opmode: New power operation mode 1946 * 1947 * This routine is used by the port drivers to report changed power operation 1948 * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB 1949 * Type-C specification, and "USB Power Delivery" when the power levels are 1950 * negotiated with methods defined in USB Power Delivery specification. 1951 */ 1952void typec_set_pwr_opmode(struct typec_port *port, 1953 enum typec_pwr_opmode opmode) 1954{ 1955 struct device *partner_dev; 1956 1957 if (port->pwr_opmode == opmode) 1958 return; 1959 1960 port->pwr_opmode = opmode; 1961 sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode"); 1962 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1963 1964 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1965 if (partner_dev) { 1966 struct typec_partner *partner = to_typec_partner(partner_dev); 1967 1968 if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) { 1969 partner->usb_pd = 1; 1970 sysfs_notify(&partner_dev->kobj, NULL, 1971 "supports_usb_power_delivery"); 1972 kobject_uevent(&partner_dev->kobj, KOBJ_CHANGE); 1973 } 1974 put_device(partner_dev); 1975 } 1976} 1977EXPORT_SYMBOL_GPL(typec_set_pwr_opmode); 1978 1979/** 1980 * typec_find_pwr_opmode - Get the typec power operation mode capability 1981 * @name: power operation mode string 1982 * 1983 * This routine is used to find the typec_pwr_opmode by its string @name. 1984 * 1985 * Returns typec_pwr_opmode if success, otherwise negative error code. 1986 */ 1987int typec_find_pwr_opmode(const char *name) 1988{ 1989 return match_string(typec_pwr_opmodes, 1990 ARRAY_SIZE(typec_pwr_opmodes), name); 1991} 1992EXPORT_SYMBOL_GPL(typec_find_pwr_opmode); 1993 1994/** 1995 * typec_find_orientation - Convert orientation string to enum typec_orientation 1996 * @name: Orientation string 1997 * 1998 * This routine is used to find the typec_orientation by its string name @name. 1999 * 2000 * Returns the orientation value on success, otherwise negative error code. 2001 */ 2002int typec_find_orientation(const char *name) 2003{ 2004 return match_string(typec_orientations, ARRAY_SIZE(typec_orientations), 2005 name); 2006} 2007EXPORT_SYMBOL_GPL(typec_find_orientation); 2008 2009/** 2010 * typec_find_port_power_role - Get the typec port power capability 2011 * @name: port power capability string 2012 * 2013 * This routine is used to find the typec_port_type by its string name. 2014 * 2015 * Returns typec_port_type if success, otherwise negative error code. 2016 */ 2017int typec_find_port_power_role(const char *name) 2018{ 2019 return match_string(typec_port_power_roles, 2020 ARRAY_SIZE(typec_port_power_roles), name); 2021} 2022EXPORT_SYMBOL_GPL(typec_find_port_power_role); 2023 2024/** 2025 * typec_find_power_role - Find the typec one specific power role 2026 * @name: power role string 2027 * 2028 * This routine is used to find the typec_role by its string name. 2029 * 2030 * Returns typec_role if success, otherwise negative error code. 2031 */ 2032int typec_find_power_role(const char *name) 2033{ 2034 return match_string(typec_roles, ARRAY_SIZE(typec_roles), name); 2035} 2036EXPORT_SYMBOL_GPL(typec_find_power_role); 2037 2038/** 2039 * typec_find_port_data_role - Get the typec port data capability 2040 * @name: port data capability string 2041 * 2042 * This routine is used to find the typec_port_data by its string name. 2043 * 2044 * Returns typec_port_data if success, otherwise negative error code. 2045 */ 2046int typec_find_port_data_role(const char *name) 2047{ 2048 return match_string(typec_port_data_roles, 2049 ARRAY_SIZE(typec_port_data_roles), name); 2050} 2051EXPORT_SYMBOL_GPL(typec_find_port_data_role); 2052 2053/* ------------------------------------------ */ 2054/* API for Multiplexer/DeMultiplexer Switches */ 2055 2056/** 2057 * typec_set_orientation - Set USB Type-C cable plug orientation 2058 * @port: USB Type-C Port 2059 * @orientation: USB Type-C cable plug orientation 2060 * 2061 * Set cable plug orientation for @port. 2062 */ 2063int typec_set_orientation(struct typec_port *port, 2064 enum typec_orientation orientation) 2065{ 2066 int ret; 2067 2068 ret = typec_switch_set(port->sw, orientation); 2069 if (ret) 2070 return ret; 2071 2072 port->orientation = orientation; 2073 sysfs_notify(&port->dev.kobj, NULL, "orientation"); 2074 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 2075 2076 return 0; 2077} 2078EXPORT_SYMBOL_GPL(typec_set_orientation); 2079 2080/** 2081 * typec_get_orientation - Get USB Type-C cable plug orientation 2082 * @port: USB Type-C Port 2083 * 2084 * Get current cable plug orientation for @port. 2085 */ 2086enum typec_orientation typec_get_orientation(struct typec_port *port) 2087{ 2088 return port->orientation; 2089} 2090EXPORT_SYMBOL_GPL(typec_get_orientation); 2091 2092/** 2093 * typec_set_mode - Set mode of operation for USB Type-C connector 2094 * @port: USB Type-C connector 2095 * @mode: Accessory Mode, USB Operation or Safe State 2096 * 2097 * Configure @port for Accessory Mode @mode. This function will configure the 2098 * muxes needed for @mode. 2099 */ 2100int typec_set_mode(struct typec_port *port, int mode) 2101{ 2102 struct typec_mux_state state = { }; 2103 2104 state.mode = mode; 2105 2106 return typec_mux_set(port->mux, &state); 2107} 2108EXPORT_SYMBOL_GPL(typec_set_mode); 2109 2110/* --------------------------------------- */ 2111 2112/** 2113 * typec_get_negotiated_svdm_version - Get negotiated SVDM Version 2114 * @port: USB Type-C Port. 2115 * 2116 * Get the negotiated SVDM Version. The Version is set to the port default 2117 * value stored in typec_capability on partner registration, and updated after 2118 * a successful Discover Identity if the negotiated value is less than the 2119 * default value. 2120 * 2121 * Returns usb_pd_svdm_ver if the partner has been registered otherwise -ENODEV. 2122 */ 2123int typec_get_negotiated_svdm_version(struct typec_port *port) 2124{ 2125 enum usb_pd_svdm_ver svdm_version; 2126 struct device *partner_dev; 2127 2128 partner_dev = device_find_child(&port->dev, NULL, partner_match); 2129 if (!partner_dev) 2130 return -ENODEV; 2131 2132 svdm_version = to_typec_partner(partner_dev)->svdm_version; 2133 put_device(partner_dev); 2134 2135 return svdm_version; 2136} 2137EXPORT_SYMBOL_GPL(typec_get_negotiated_svdm_version); 2138 2139/** 2140 * typec_get_cable_svdm_version - Get cable negotiated SVDM Version 2141 * @port: USB Type-C Port. 2142 * 2143 * Get the negotiated SVDM Version for the cable. The Version is set to the port 2144 * default value based on the PD Revision during cable registration, and updated 2145 * after a successful Discover Identity if the negotiated value is less than the 2146 * default. 2147 * 2148 * Returns usb_pd_svdm_ver if the cable has been registered otherwise -ENODEV. 2149 */ 2150int typec_get_cable_svdm_version(struct typec_port *port) 2151{ 2152 enum usb_pd_svdm_ver svdm_version; 2153 struct device *cable_dev; 2154 2155 cable_dev = device_find_child(&port->dev, NULL, cable_match); 2156 if (!cable_dev) 2157 return -ENODEV; 2158 2159 svdm_version = to_typec_cable(cable_dev)->svdm_version; 2160 put_device(cable_dev); 2161 2162 return svdm_version; 2163} 2164EXPORT_SYMBOL_GPL(typec_get_cable_svdm_version); 2165 2166/** 2167 * typec_cable_set_svdm_version - Set negotiated Structured VDM (SVDM) Version 2168 * @cable: USB Type-C Active Cable that supports SVDM 2169 * @svdm_version: Negotiated SVDM Version 2170 * 2171 * This routine is used to save the negotiated SVDM Version. 2172 */ 2173void typec_cable_set_svdm_version(struct typec_cable *cable, enum usb_pd_svdm_ver svdm_version) 2174{ 2175 cable->svdm_version = svdm_version; 2176} 2177EXPORT_SYMBOL_GPL(typec_cable_set_svdm_version); 2178 2179/** 2180 * typec_get_drvdata - Return private driver data pointer 2181 * @port: USB Type-C port 2182 */ 2183void *typec_get_drvdata(struct typec_port *port) 2184{ 2185 return dev_get_drvdata(&port->dev); 2186} 2187EXPORT_SYMBOL_GPL(typec_get_drvdata); 2188 2189int typec_get_fw_cap(struct typec_capability *cap, 2190 struct fwnode_handle *fwnode) 2191{ 2192 const char *cap_str; 2193 int ret; 2194 2195 cap->fwnode = fwnode; 2196 2197 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str); 2198 if (ret < 0) 2199 return ret; 2200 2201 ret = typec_find_port_power_role(cap_str); 2202 if (ret < 0) 2203 return ret; 2204 cap->type = ret; 2205 2206 /* USB data support is optional */ 2207 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); 2208 if (ret == 0) { 2209 ret = typec_find_port_data_role(cap_str); 2210 if (ret < 0) 2211 return ret; 2212 cap->data = ret; 2213 } 2214 2215 /* Get the preferred power role for a DRP */ 2216 if (cap->type == TYPEC_PORT_DRP) { 2217 cap->prefer_role = TYPEC_NO_PREFERRED_ROLE; 2218 2219 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str); 2220 if (ret == 0) { 2221 ret = typec_find_power_role(cap_str); 2222 if (ret < 0) 2223 return ret; 2224 cap->prefer_role = ret; 2225 } 2226 } 2227 2228 return 0; 2229} 2230EXPORT_SYMBOL_GPL(typec_get_fw_cap); 2231 2232/** 2233 * typec_port_register_altmode - Register USB Type-C Port Alternate Mode 2234 * @port: USB Type-C Port that supports the alternate mode 2235 * @desc: Description of the alternate mode 2236 * 2237 * This routine is used to register an alternate mode that @port is capable of 2238 * supporting. 2239 * 2240 * Returns handle to the alternate mode on success or ERR_PTR on failure. 2241 */ 2242struct typec_altmode * 2243typec_port_register_altmode(struct typec_port *port, 2244 const struct typec_altmode_desc *desc) 2245{ 2246 struct typec_altmode *adev; 2247 struct typec_mux *mux; 2248 struct typec_retimer *retimer; 2249 2250 mux = typec_mux_get(&port->dev); 2251 if (IS_ERR(mux)) 2252 return ERR_CAST(mux); 2253 2254 retimer = typec_retimer_get(&port->dev); 2255 if (IS_ERR(retimer)) { 2256 typec_mux_put(mux); 2257 return ERR_CAST(retimer); 2258 } 2259 2260 adev = typec_register_altmode(&port->dev, desc); 2261 if (IS_ERR(adev)) { 2262 typec_retimer_put(retimer); 2263 typec_mux_put(mux); 2264 } else { 2265 to_altmode(adev)->mux = mux; 2266 to_altmode(adev)->retimer = retimer; 2267 } 2268 2269 return adev; 2270} 2271EXPORT_SYMBOL_GPL(typec_port_register_altmode); 2272 2273void typec_port_register_altmodes(struct typec_port *port, 2274 const struct typec_altmode_ops *ops, void *drvdata, 2275 struct typec_altmode **altmodes, size_t n) 2276{ 2277 struct fwnode_handle *altmodes_node, *child; 2278 struct typec_altmode_desc desc; 2279 struct typec_altmode *alt; 2280 size_t index = 0; 2281 u16 svid; 2282 u32 vdo; 2283 int ret; 2284 2285 altmodes_node = device_get_named_child_node(&port->dev, "altmodes"); 2286 if (!altmodes_node) 2287 return; /* No altmodes specified */ 2288 2289 fwnode_for_each_child_node(altmodes_node, child) { 2290 ret = fwnode_property_read_u16(child, "svid", &svid); 2291 if (ret) { 2292 dev_err(&port->dev, "Error reading svid for altmode %s\n", 2293 fwnode_get_name(child)); 2294 continue; 2295 } 2296 2297 ret = fwnode_property_read_u32(child, "vdo", &vdo); 2298 if (ret) { 2299 dev_err(&port->dev, "Error reading vdo for altmode %s\n", 2300 fwnode_get_name(child)); 2301 continue; 2302 } 2303 2304 if (index >= n) { 2305 dev_err(&port->dev, "Error not enough space for altmode %s\n", 2306 fwnode_get_name(child)); 2307 continue; 2308 } 2309 2310 desc.svid = svid; 2311 desc.vdo = vdo; 2312 desc.mode = index + 1; 2313 alt = typec_port_register_altmode(port, &desc); 2314 if (IS_ERR(alt)) { 2315 dev_err(&port->dev, "Error registering altmode %s\n", 2316 fwnode_get_name(child)); 2317 continue; 2318 } 2319 2320 alt->ops = ops; 2321 typec_altmode_set_drvdata(alt, drvdata); 2322 altmodes[index] = alt; 2323 index++; 2324 } 2325} 2326EXPORT_SYMBOL_GPL(typec_port_register_altmodes); 2327 2328/** 2329 * typec_port_register_cable_ops - Register typec_cable_ops to port altmodes 2330 * @altmodes: USB Type-C Port's altmode vector 2331 * @max_altmodes: The maximum number of alt modes supported by the port 2332 * @ops: Cable alternate mode vector 2333 */ 2334void typec_port_register_cable_ops(struct typec_altmode **altmodes, int max_altmodes, 2335 const struct typec_cable_ops *ops) 2336{ 2337 int i; 2338 2339 for (i = 0; i < max_altmodes; i++) { 2340 if (!altmodes[i]) 2341 return; 2342 altmodes[i]->cable_ops = ops; 2343 } 2344} 2345EXPORT_SYMBOL_GPL(typec_port_register_cable_ops); 2346 2347/** 2348 * typec_register_port - Register a USB Type-C Port 2349 * @parent: Parent device 2350 * @cap: Description of the port 2351 * 2352 * Registers a device for USB Type-C Port described in @cap. 2353 * 2354 * Returns handle to the port on success or ERR_PTR on failure. 2355 */ 2356struct typec_port *typec_register_port(struct device *parent, 2357 const struct typec_capability *cap) 2358{ 2359 struct typec_port *port; 2360 int ret; 2361 int id; 2362 2363 port = kzalloc(sizeof(*port), GFP_KERNEL); 2364 if (!port) 2365 return ERR_PTR(-ENOMEM); 2366 2367 id = ida_alloc(&typec_index_ida, GFP_KERNEL); 2368 if (id < 0) { 2369 kfree(port); 2370 return ERR_PTR(id); 2371 } 2372 2373 switch (cap->type) { 2374 case TYPEC_PORT_SRC: 2375 port->pwr_role = TYPEC_SOURCE; 2376 port->vconn_role = TYPEC_SOURCE; 2377 break; 2378 case TYPEC_PORT_SNK: 2379 port->pwr_role = TYPEC_SINK; 2380 port->vconn_role = TYPEC_SINK; 2381 break; 2382 case TYPEC_PORT_DRP: 2383 if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE) 2384 port->pwr_role = cap->prefer_role; 2385 else 2386 port->pwr_role = TYPEC_SINK; 2387 break; 2388 } 2389 2390 switch (cap->data) { 2391 case TYPEC_PORT_DFP: 2392 port->data_role = TYPEC_HOST; 2393 break; 2394 case TYPEC_PORT_UFP: 2395 port->data_role = TYPEC_DEVICE; 2396 break; 2397 case TYPEC_PORT_DRD: 2398 if (cap->prefer_role == TYPEC_SOURCE) 2399 port->data_role = TYPEC_HOST; 2400 else 2401 port->data_role = TYPEC_DEVICE; 2402 break; 2403 } 2404 2405 ida_init(&port->mode_ids); 2406 mutex_init(&port->port_type_lock); 2407 2408 port->id = id; 2409 port->ops = cap->ops; 2410 port->port_type = cap->type; 2411 port->prefer_role = cap->prefer_role; 2412 port->con.attach = typec_partner_attach; 2413 port->con.deattach = typec_partner_deattach; 2414 2415 device_initialize(&port->dev); 2416 port->dev.class = &typec_class; 2417 port->dev.parent = parent; 2418 port->dev.fwnode = cap->fwnode; 2419 port->dev.type = &typec_port_dev_type; 2420 dev_set_name(&port->dev, "port%d", id); 2421 dev_set_drvdata(&port->dev, cap->driver_data); 2422 2423 port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL); 2424 if (!port->cap) { 2425 put_device(&port->dev); 2426 return ERR_PTR(-ENOMEM); 2427 } 2428 2429 port->sw = typec_switch_get(&port->dev); 2430 if (IS_ERR(port->sw)) { 2431 ret = PTR_ERR(port->sw); 2432 put_device(&port->dev); 2433 return ERR_PTR(ret); 2434 } 2435 2436 port->mux = typec_mux_get(&port->dev); 2437 if (IS_ERR(port->mux)) { 2438 ret = PTR_ERR(port->mux); 2439 put_device(&port->dev); 2440 return ERR_PTR(ret); 2441 } 2442 2443 port->retimer = typec_retimer_get(&port->dev); 2444 if (IS_ERR(port->retimer)) { 2445 ret = PTR_ERR(port->retimer); 2446 put_device(&port->dev); 2447 return ERR_PTR(ret); 2448 } 2449 2450 port->pd = cap->pd; 2451 2452 ret = device_add(&port->dev); 2453 if (ret) { 2454 dev_err(parent, "failed to register port (%d)\n", ret); 2455 put_device(&port->dev); 2456 return ERR_PTR(ret); 2457 } 2458 2459 ret = usb_power_delivery_link_device(port->pd, &port->dev); 2460 if (ret) { 2461 dev_err(&port->dev, "failed to link pd\n"); 2462 device_unregister(&port->dev); 2463 return ERR_PTR(ret); 2464 } 2465 2466 ret = typec_link_ports(port); 2467 if (ret) 2468 dev_warn(&port->dev, "failed to create symlinks (%d)\n", ret); 2469 2470 return port; 2471} 2472EXPORT_SYMBOL_GPL(typec_register_port); 2473 2474/** 2475 * typec_unregister_port - Unregister a USB Type-C Port 2476 * @port: The port to be unregistered 2477 * 2478 * Unregister device created with typec_register_port(). 2479 */ 2480void typec_unregister_port(struct typec_port *port) 2481{ 2482 if (!IS_ERR_OR_NULL(port)) { 2483 typec_unlink_ports(port); 2484 typec_port_set_usb_power_delivery(port, NULL); 2485 device_unregister(&port->dev); 2486 } 2487} 2488EXPORT_SYMBOL_GPL(typec_unregister_port); 2489 2490static int __init typec_init(void) 2491{ 2492 int ret; 2493 2494 ret = bus_register(&typec_bus); 2495 if (ret) 2496 return ret; 2497 2498 ret = class_register(&typec_mux_class); 2499 if (ret) 2500 goto err_unregister_bus; 2501 2502 ret = class_register(&retimer_class); 2503 if (ret) 2504 goto err_unregister_mux_class; 2505 2506 ret = class_register(&typec_class); 2507 if (ret) 2508 goto err_unregister_retimer_class; 2509 2510 ret = usb_power_delivery_init(); 2511 if (ret) 2512 goto err_unregister_class; 2513 2514 return 0; 2515 2516err_unregister_class: 2517 class_unregister(&typec_class); 2518 2519err_unregister_retimer_class: 2520 class_unregister(&retimer_class); 2521 2522err_unregister_mux_class: 2523 class_unregister(&typec_mux_class); 2524 2525err_unregister_bus: 2526 bus_unregister(&typec_bus); 2527 2528 return ret; 2529} 2530subsys_initcall(typec_init); 2531 2532static void __exit typec_exit(void) 2533{ 2534 usb_power_delivery_exit(); 2535 class_unregister(&typec_class); 2536 ida_destroy(&typec_index_ida); 2537 bus_unregister(&typec_bus); 2538 class_unregister(&typec_mux_class); 2539 class_unregister(&retimer_class); 2540} 2541module_exit(typec_exit); 2542 2543MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>"); 2544MODULE_LICENSE("GPL v2"); 2545MODULE_DESCRIPTION("USB Type-C Connector Class"); 2546