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 <[email protected]> 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 22 static DEFINE_IDA(typec_index_ida); 23 24 const struct class typec_class = { 25 .name = "typec", 26 }; 27 28 /* ------------------------------------------------------------------------- */ 29 /* Common attributes */ 30 31 static 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 */ 38 static 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 46 static 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 53 static 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 60 static 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 74 static 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 } 99 100 static 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 } 107 static DEVICE_ATTR_RO(id_header); 108 109 static 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 } 116 static DEVICE_ATTR_RO(cert_stat); 117 118 static 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 } 125 static DEVICE_ATTR_RO(product); 126 127 static 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 } 134 static DEVICE_ATTR_RO(product_type_vdo1); 135 136 static 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 } 143 static DEVICE_ATTR_RO(product_type_vdo2); 144 145 static 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 } 152 static DEVICE_ATTR_RO(product_type_vdo3); 153 154 static 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 }; 163 164 static const struct attribute_group usb_pd_id_group = { 165 .name = "identity", 166 .attrs = usb_pd_id_attrs, 167 }; 168 169 static const struct attribute_group *usb_pd_id_groups[] = { 170 &usb_pd_id_group, 171 NULL, 172 }; 173 174 static 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 } 192 193 static 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 } 203 204 static ssize_t 205 type_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 } 215 static DEVICE_ATTR_RO(type); 216 217 static ssize_t usb_power_delivery_revision_show(struct device *dev, 218 struct device_attribute *attr, 219 char *buf); 220 static DEVICE_ATTR_RO(usb_power_delivery_revision); 221 222 /* ------------------------------------------------------------------------- */ 223 /* Alternate Modes */ 224 225 static 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 } 235 236 static 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 } 261 262 static 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 */ 292 void 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 } 312 EXPORT_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 */ 321 struct 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 } 332 EXPORT_SYMBOL_GPL(typec_altmode2port); 333 334 static ssize_t 335 vdo_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 } 341 static DEVICE_ATTR_RO(vdo); 342 343 static ssize_t 344 description_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 } 350 static DEVICE_ATTR_RO(description); 351 352 static ssize_t 353 active_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 } 359 360 static 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 } 397 static DEVICE_ATTR_RW(active); 398 399 static ssize_t 400 supported_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 } 420 static DEVICE_ATTR_RO(supported_roles); 421 422 static ssize_t 423 mode_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 } 429 static DEVICE_ATTR_RO(mode); 430 431 static ssize_t 432 svid_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 } 438 static DEVICE_ATTR_RO(svid); 439 440 static 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 }; 447 448 static 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 } 459 460 static const struct attribute_group typec_altmode_group = { 461 .is_visible = typec_altmode_attr_is_visible, 462 .attrs = typec_altmode_attrs, 463 }; 464 465 static const struct attribute_group *typec_altmode_groups[] = { 466 &typec_altmode_group, 467 NULL 468 }; 469 470 /** 471 * typec_altmode_set_ops - Set ops for altmode 472 * @adev: Handle to the alternate mode 473 * @ops: Ops for the alternate mode 474 * 475 * After setting ops, attribute visiblity needs to be refreshed if the alternate 476 * mode can be activated. 477 */ 478 void typec_altmode_set_ops(struct typec_altmode *adev, 479 const struct typec_altmode_ops *ops) 480 { 481 adev->ops = ops; 482 sysfs_update_group(&adev->dev.kobj, &typec_altmode_group); 483 } 484 EXPORT_SYMBOL_GPL(typec_altmode_set_ops); 485 486 static int altmode_id_get(struct device *dev) 487 { 488 struct ida *ids; 489 490 if (is_typec_partner(dev)) 491 ids = &to_typec_partner(dev)->mode_ids; 492 else if (is_typec_plug(dev)) 493 ids = &to_typec_plug(dev)->mode_ids; 494 else 495 ids = &to_typec_port(dev)->mode_ids; 496 497 return ida_alloc(ids, GFP_KERNEL); 498 } 499 500 static void altmode_id_remove(struct device *dev, int id) 501 { 502 struct ida *ids; 503 504 if (is_typec_partner(dev)) 505 ids = &to_typec_partner(dev)->mode_ids; 506 else if (is_typec_plug(dev)) 507 ids = &to_typec_plug(dev)->mode_ids; 508 else 509 ids = &to_typec_port(dev)->mode_ids; 510 511 ida_free(ids, id); 512 } 513 514 static void typec_altmode_release(struct device *dev) 515 { 516 struct altmode *alt = to_altmode(to_typec_altmode(dev)); 517 518 if (!is_typec_port(dev->parent)) 519 typec_altmode_put_partner(alt); 520 521 altmode_id_remove(alt->adev.dev.parent, alt->id); 522 put_device(alt->adev.dev.parent); 523 kfree(alt); 524 } 525 526 const struct device_type typec_altmode_dev_type = { 527 .name = "typec_alternate_mode", 528 .groups = typec_altmode_groups, 529 .release = typec_altmode_release, 530 }; 531 532 static struct typec_altmode * 533 typec_register_altmode(struct device *parent, 534 const struct typec_altmode_desc *desc) 535 { 536 unsigned int id = altmode_id_get(parent); 537 bool is_port = is_typec_port(parent); 538 struct altmode *alt; 539 int ret; 540 541 alt = kzalloc(sizeof(*alt), GFP_KERNEL); 542 if (!alt) { 543 altmode_id_remove(parent, id); 544 return ERR_PTR(-ENOMEM); 545 } 546 547 alt->adev.svid = desc->svid; 548 alt->adev.mode = desc->mode; 549 alt->adev.vdo = desc->vdo; 550 alt->roles = desc->roles; 551 alt->id = id; 552 553 alt->attrs[0] = &dev_attr_vdo.attr; 554 alt->attrs[1] = &dev_attr_description.attr; 555 alt->attrs[2] = &dev_attr_active.attr; 556 557 if (is_port) { 558 alt->attrs[3] = &dev_attr_supported_roles.attr; 559 alt->adev.active = true; /* Enabled by default */ 560 } 561 562 sprintf(alt->group_name, "mode%d", desc->mode); 563 alt->group.name = alt->group_name; 564 alt->group.attrs = alt->attrs; 565 alt->groups[0] = &alt->group; 566 567 alt->adev.dev.parent = parent; 568 alt->adev.dev.groups = alt->groups; 569 alt->adev.dev.type = &typec_altmode_dev_type; 570 dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id); 571 572 get_device(alt->adev.dev.parent); 573 574 /* Link partners and plugs with the ports */ 575 if (!is_port) 576 typec_altmode_set_partner(alt); 577 578 /* The partners are bind to drivers */ 579 if (is_typec_partner(parent)) 580 alt->adev.dev.bus = &typec_bus; 581 582 /* Plug alt modes need a class to generate udev events. */ 583 if (is_typec_plug(parent)) 584 alt->adev.dev.class = &typec_class; 585 586 ret = device_register(&alt->adev.dev); 587 if (ret) { 588 dev_err(parent, "failed to register alternate mode (%d)\n", 589 ret); 590 put_device(&alt->adev.dev); 591 return ERR_PTR(ret); 592 } 593 594 return &alt->adev; 595 } 596 597 /** 598 * typec_unregister_altmode - Unregister Alternate Mode 599 * @adev: The alternate mode to be unregistered 600 * 601 * Unregister device created with typec_partner_register_altmode(), 602 * typec_plug_register_altmode() or typec_port_register_altmode(). 603 */ 604 void typec_unregister_altmode(struct typec_altmode *adev) 605 { 606 if (IS_ERR_OR_NULL(adev)) 607 return; 608 typec_retimer_put(to_altmode(adev)->retimer); 609 typec_mux_put(to_altmode(adev)->mux); 610 device_unregister(&adev->dev); 611 } 612 EXPORT_SYMBOL_GPL(typec_unregister_altmode); 613 614 /* ------------------------------------------------------------------------- */ 615 /* Type-C Partners */ 616 617 static ssize_t accessory_mode_show(struct device *dev, 618 struct device_attribute *attr, 619 char *buf) 620 { 621 struct typec_partner *p = to_typec_partner(dev); 622 623 return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]); 624 } 625 static DEVICE_ATTR_RO(accessory_mode); 626 627 static ssize_t supports_usb_power_delivery_show(struct device *dev, 628 struct device_attribute *attr, 629 char *buf) 630 { 631 struct typec_partner *p = to_typec_partner(dev); 632 633 return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no"); 634 } 635 static DEVICE_ATTR_RO(supports_usb_power_delivery); 636 637 static ssize_t number_of_alternate_modes_show(struct device *dev, struct device_attribute *attr, 638 char *buf) 639 { 640 struct typec_partner *partner; 641 struct typec_plug *plug; 642 int num_altmodes; 643 644 if (is_typec_partner(dev)) { 645 partner = to_typec_partner(dev); 646 num_altmodes = partner->num_altmodes; 647 } else if (is_typec_plug(dev)) { 648 plug = to_typec_plug(dev); 649 num_altmodes = plug->num_altmodes; 650 } else { 651 return 0; 652 } 653 654 return sysfs_emit(buf, "%d\n", num_altmodes); 655 } 656 static DEVICE_ATTR_RO(number_of_alternate_modes); 657 658 static struct attribute *typec_partner_attrs[] = { 659 &dev_attr_accessory_mode.attr, 660 &dev_attr_supports_usb_power_delivery.attr, 661 &dev_attr_number_of_alternate_modes.attr, 662 &dev_attr_type.attr, 663 &dev_attr_usb_power_delivery_revision.attr, 664 NULL 665 }; 666 667 static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 668 { 669 struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj)); 670 671 if (attr == &dev_attr_number_of_alternate_modes.attr) { 672 if (partner->num_altmodes < 0) 673 return 0; 674 } 675 676 if (attr == &dev_attr_type.attr) 677 if (!get_pd_product_type(kobj_to_dev(kobj))) 678 return 0; 679 680 return attr->mode; 681 } 682 683 static const struct attribute_group typec_partner_group = { 684 .is_visible = typec_partner_attr_is_visible, 685 .attrs = typec_partner_attrs 686 }; 687 688 static const struct attribute_group *typec_partner_groups[] = { 689 &typec_partner_group, 690 NULL 691 }; 692 693 static void typec_partner_release(struct device *dev) 694 { 695 struct typec_partner *partner = to_typec_partner(dev); 696 697 ida_destroy(&partner->mode_ids); 698 kfree(partner); 699 } 700 701 const struct device_type typec_partner_dev_type = { 702 .name = "typec_partner", 703 .groups = typec_partner_groups, 704 .release = typec_partner_release, 705 }; 706 707 static void typec_partner_link_device(struct typec_partner *partner, struct device *dev) 708 { 709 int ret; 710 711 ret = sysfs_create_link(&dev->kobj, &partner->dev.kobj, "typec"); 712 if (ret) 713 return; 714 715 ret = sysfs_create_link(&partner->dev.kobj, &dev->kobj, dev_name(dev)); 716 if (ret) { 717 sysfs_remove_link(&dev->kobj, "typec"); 718 return; 719 } 720 721 if (partner->attach) 722 partner->attach(partner, dev); 723 } 724 725 static void typec_partner_unlink_device(struct typec_partner *partner, struct device *dev) 726 { 727 sysfs_remove_link(&partner->dev.kobj, dev_name(dev)); 728 sysfs_remove_link(&dev->kobj, "typec"); 729 730 if (partner->deattach) 731 partner->deattach(partner, dev); 732 } 733 734 /** 735 * typec_partner_set_identity - Report result from Discover Identity command 736 * @partner: The partner updated identity values 737 * 738 * This routine is used to report that the result of Discover Identity USB power 739 * delivery command has become available. 740 */ 741 int typec_partner_set_identity(struct typec_partner *partner) 742 { 743 if (!partner->identity) 744 return -EINVAL; 745 746 typec_report_identity(&partner->dev); 747 return 0; 748 } 749 EXPORT_SYMBOL_GPL(typec_partner_set_identity); 750 751 /** 752 * typec_partner_set_pd_revision - Set the PD revision supported by the partner 753 * @partner: The partner to be updated. 754 * @pd_revision: USB Power Delivery Specification Revision supported by partner 755 * 756 * This routine is used to report that the PD revision of the port partner has 757 * become available. 758 */ 759 void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision) 760 { 761 if (partner->pd_revision == pd_revision) 762 return; 763 764 partner->pd_revision = pd_revision; 765 sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision"); 766 if (pd_revision != 0 && !partner->usb_pd) { 767 partner->usb_pd = 1; 768 sysfs_notify(&partner->dev.kobj, NULL, 769 "supports_usb_power_delivery"); 770 } 771 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 772 } 773 EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision); 774 775 /** 776 * typec_partner_set_usb_power_delivery - Declare USB Power Delivery Contract. 777 * @partner: The partner device. 778 * @pd: The USB PD instance. 779 * 780 * This routine can be used to declare USB Power Delivery Contract with @partner 781 * by linking @partner to @pd which contains the objects that were used during the 782 * negotiation of the contract. 783 * 784 * If @pd is NULL, the link is removed and the contract with @partner has ended. 785 */ 786 int typec_partner_set_usb_power_delivery(struct typec_partner *partner, 787 struct usb_power_delivery *pd) 788 { 789 int ret; 790 791 if (IS_ERR_OR_NULL(partner) || partner->pd == pd) 792 return 0; 793 794 if (pd) { 795 ret = usb_power_delivery_link_device(pd, &partner->dev); 796 if (ret) 797 return ret; 798 } else { 799 usb_power_delivery_unlink_device(partner->pd, &partner->dev); 800 } 801 802 partner->pd = pd; 803 804 return 0; 805 } 806 EXPORT_SYMBOL_GPL(typec_partner_set_usb_power_delivery); 807 808 /** 809 * typec_partner_set_num_altmodes - Set the number of available partner altmodes 810 * @partner: The partner to be updated. 811 * @num_altmodes: The number of altmodes we want to specify as available. 812 * 813 * This routine is used to report the number of alternate modes supported by the 814 * partner. This value is *not* enforced in alternate mode registration routines. 815 * 816 * @partner.num_altmodes is set to -1 on partner registration, denoting that 817 * a valid value has not been set for it yet. 818 * 819 * Returns 0 on success or negative error number on failure. 820 */ 821 int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes) 822 { 823 int ret; 824 825 if (num_altmodes < 0) 826 return -EINVAL; 827 828 partner->num_altmodes = num_altmodes; 829 ret = sysfs_update_group(&partner->dev.kobj, &typec_partner_group); 830 if (ret < 0) 831 return ret; 832 833 sysfs_notify(&partner->dev.kobj, NULL, "number_of_alternate_modes"); 834 kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE); 835 836 return 0; 837 } 838 EXPORT_SYMBOL_GPL(typec_partner_set_num_altmodes); 839 840 /** 841 * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode 842 * @partner: USB Type-C Partner that supports the alternate mode 843 * @desc: Description of the alternate mode 844 * 845 * This routine is used to register each alternate mode individually that 846 * @partner has listed in response to Discover SVIDs command. The modes for a 847 * SVID listed in response to Discover Modes command need to be listed in an 848 * array in @desc. 849 * 850 * Returns handle to the alternate mode on success or ERR_PTR on failure. 851 */ 852 struct typec_altmode * 853 typec_partner_register_altmode(struct typec_partner *partner, 854 const struct typec_altmode_desc *desc) 855 { 856 return typec_register_altmode(&partner->dev, desc); 857 } 858 EXPORT_SYMBOL_GPL(typec_partner_register_altmode); 859 860 /** 861 * typec_partner_set_svdm_version - Set negotiated Structured VDM (SVDM) Version 862 * @partner: USB Type-C Partner that supports SVDM 863 * @svdm_version: Negotiated SVDM Version 864 * 865 * This routine is used to save the negotiated SVDM Version. 866 */ 867 void typec_partner_set_svdm_version(struct typec_partner *partner, 868 enum usb_pd_svdm_ver svdm_version) 869 { 870 partner->svdm_version = svdm_version; 871 } 872 EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version); 873 874 /** 875 * typec_partner_usb_power_delivery_register - Register Type-C partner USB Power Delivery Support 876 * @partner: Type-C partner device. 877 * @desc: Description of the USB PD contract. 878 * 879 * This routine is a wrapper around usb_power_delivery_register(). It registers 880 * USB Power Delivery Capabilities for a Type-C partner device. Specifically, 881 * it sets the Type-C partner device as a parent for the resulting USB Power Delivery object. 882 * 883 * Returns handle to struct usb_power_delivery or ERR_PTR. 884 */ 885 struct usb_power_delivery * 886 typec_partner_usb_power_delivery_register(struct typec_partner *partner, 887 struct usb_power_delivery_desc *desc) 888 { 889 return usb_power_delivery_register(&partner->dev, desc); 890 } 891 EXPORT_SYMBOL_GPL(typec_partner_usb_power_delivery_register); 892 893 /** 894 * typec_register_partner - Register a USB Type-C Partner 895 * @port: The USB Type-C Port the partner is connected to 896 * @desc: Description of the partner 897 * 898 * Registers a device for USB Type-C Partner described in @desc. 899 * 900 * Returns handle to the partner on success or ERR_PTR on failure. 901 */ 902 struct typec_partner *typec_register_partner(struct typec_port *port, 903 struct typec_partner_desc *desc) 904 { 905 struct typec_partner *partner; 906 int ret; 907 908 partner = kzalloc(sizeof(*partner), GFP_KERNEL); 909 if (!partner) 910 return ERR_PTR(-ENOMEM); 911 912 ida_init(&partner->mode_ids); 913 partner->usb_pd = desc->usb_pd; 914 partner->accessory = desc->accessory; 915 partner->num_altmodes = -1; 916 partner->pd_revision = desc->pd_revision; 917 partner->svdm_version = port->cap->svdm_version; 918 partner->attach = desc->attach; 919 partner->deattach = desc->deattach; 920 921 if (desc->identity) { 922 /* 923 * Creating directory for the identity only if the driver is 924 * able to provide data to it. 925 */ 926 partner->dev.groups = usb_pd_id_groups; 927 partner->identity = desc->identity; 928 } 929 930 partner->dev.class = &typec_class; 931 partner->dev.parent = &port->dev; 932 partner->dev.type = &typec_partner_dev_type; 933 dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev)); 934 935 ret = device_register(&partner->dev); 936 if (ret) { 937 dev_err(&port->dev, "failed to register partner (%d)\n", ret); 938 put_device(&partner->dev); 939 return ERR_PTR(ret); 940 } 941 942 if (port->usb2_dev) 943 typec_partner_link_device(partner, port->usb2_dev); 944 if (port->usb3_dev) 945 typec_partner_link_device(partner, port->usb3_dev); 946 947 return partner; 948 } 949 EXPORT_SYMBOL_GPL(typec_register_partner); 950 951 /** 952 * typec_unregister_partner - Unregister a USB Type-C Partner 953 * @partner: The partner to be unregistered 954 * 955 * Unregister device created with typec_register_partner(). 956 */ 957 void typec_unregister_partner(struct typec_partner *partner) 958 { 959 struct typec_port *port; 960 961 if (IS_ERR_OR_NULL(partner)) 962 return; 963 964 port = to_typec_port(partner->dev.parent); 965 966 if (port->usb2_dev) 967 typec_partner_unlink_device(partner, port->usb2_dev); 968 if (port->usb3_dev) 969 typec_partner_unlink_device(partner, port->usb3_dev); 970 971 device_unregister(&partner->dev); 972 } 973 EXPORT_SYMBOL_GPL(typec_unregister_partner); 974 975 /* ------------------------------------------------------------------------- */ 976 /* Type-C Cable Plugs */ 977 978 static void typec_plug_release(struct device *dev) 979 { 980 struct typec_plug *plug = to_typec_plug(dev); 981 982 ida_destroy(&plug->mode_ids); 983 kfree(plug); 984 } 985 986 static struct attribute *typec_plug_attrs[] = { 987 &dev_attr_number_of_alternate_modes.attr, 988 NULL 989 }; 990 991 static umode_t typec_plug_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 992 { 993 struct typec_plug *plug = to_typec_plug(kobj_to_dev(kobj)); 994 995 if (attr == &dev_attr_number_of_alternate_modes.attr) { 996 if (plug->num_altmodes < 0) 997 return 0; 998 } 999 1000 return attr->mode; 1001 } 1002 1003 static const struct attribute_group typec_plug_group = { 1004 .is_visible = typec_plug_attr_is_visible, 1005 .attrs = typec_plug_attrs 1006 }; 1007 1008 static const struct attribute_group *typec_plug_groups[] = { 1009 &typec_plug_group, 1010 NULL 1011 }; 1012 1013 const struct device_type typec_plug_dev_type = { 1014 .name = "typec_plug", 1015 .groups = typec_plug_groups, 1016 .release = typec_plug_release, 1017 }; 1018 1019 /** 1020 * typec_plug_set_num_altmodes - Set the number of available plug altmodes 1021 * @plug: The plug to be updated. 1022 * @num_altmodes: The number of altmodes we want to specify as available. 1023 * 1024 * This routine is used to report the number of alternate modes supported by the 1025 * plug. This value is *not* enforced in alternate mode registration routines. 1026 * 1027 * @plug.num_altmodes is set to -1 on plug registration, denoting that 1028 * a valid value has not been set for it yet. 1029 * 1030 * Returns 0 on success or negative error number on failure. 1031 */ 1032 int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes) 1033 { 1034 int ret; 1035 1036 if (num_altmodes < 0) 1037 return -EINVAL; 1038 1039 plug->num_altmodes = num_altmodes; 1040 ret = sysfs_update_group(&plug->dev.kobj, &typec_plug_group); 1041 if (ret < 0) 1042 return ret; 1043 1044 sysfs_notify(&plug->dev.kobj, NULL, "number_of_alternate_modes"); 1045 kobject_uevent(&plug->dev.kobj, KOBJ_CHANGE); 1046 1047 return 0; 1048 } 1049 EXPORT_SYMBOL_GPL(typec_plug_set_num_altmodes); 1050 1051 /** 1052 * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode 1053 * @plug: USB Type-C Cable Plug that supports the alternate mode 1054 * @desc: Description of the alternate mode 1055 * 1056 * This routine is used to register each alternate mode individually that @plug 1057 * has listed in response to Discover SVIDs command. The modes for a SVID that 1058 * the plug lists in response to Discover Modes command need to be listed in an 1059 * array in @desc. 1060 * 1061 * Returns handle to the alternate mode on success or ERR_PTR on failure. 1062 */ 1063 struct typec_altmode * 1064 typec_plug_register_altmode(struct typec_plug *plug, 1065 const struct typec_altmode_desc *desc) 1066 { 1067 return typec_register_altmode(&plug->dev, desc); 1068 } 1069 EXPORT_SYMBOL_GPL(typec_plug_register_altmode); 1070 1071 /** 1072 * typec_register_plug - Register a USB Type-C Cable Plug 1073 * @cable: USB Type-C Cable with the plug 1074 * @desc: Description of the cable plug 1075 * 1076 * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C 1077 * Cable Plug represents a plug with electronics in it that can response to USB 1078 * Power Delivery SOP Prime or SOP Double Prime packages. 1079 * 1080 * Returns handle to the cable plug on success or ERR_PTR on failure. 1081 */ 1082 struct typec_plug *typec_register_plug(struct typec_cable *cable, 1083 struct typec_plug_desc *desc) 1084 { 1085 struct typec_plug *plug; 1086 char name[8]; 1087 int ret; 1088 1089 plug = kzalloc(sizeof(*plug), GFP_KERNEL); 1090 if (!plug) 1091 return ERR_PTR(-ENOMEM); 1092 1093 sprintf(name, "plug%d", desc->index); 1094 1095 ida_init(&plug->mode_ids); 1096 plug->num_altmodes = -1; 1097 plug->index = desc->index; 1098 plug->dev.class = &typec_class; 1099 plug->dev.parent = &cable->dev; 1100 plug->dev.type = &typec_plug_dev_type; 1101 dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name); 1102 1103 ret = device_register(&plug->dev); 1104 if (ret) { 1105 dev_err(&cable->dev, "failed to register plug (%d)\n", ret); 1106 put_device(&plug->dev); 1107 return ERR_PTR(ret); 1108 } 1109 1110 return plug; 1111 } 1112 EXPORT_SYMBOL_GPL(typec_register_plug); 1113 1114 /** 1115 * typec_unregister_plug - Unregister a USB Type-C Cable Plug 1116 * @plug: The cable plug to be unregistered 1117 * 1118 * Unregister device created with typec_register_plug(). 1119 */ 1120 void typec_unregister_plug(struct typec_plug *plug) 1121 { 1122 if (!IS_ERR_OR_NULL(plug)) 1123 device_unregister(&plug->dev); 1124 } 1125 EXPORT_SYMBOL_GPL(typec_unregister_plug); 1126 1127 /* Type-C Cables */ 1128 1129 static const char * const typec_plug_types[] = { 1130 [USB_PLUG_NONE] = "unknown", 1131 [USB_PLUG_TYPE_A] = "type-a", 1132 [USB_PLUG_TYPE_B] = "type-b", 1133 [USB_PLUG_TYPE_C] = "type-c", 1134 [USB_PLUG_CAPTIVE] = "captive", 1135 }; 1136 1137 static ssize_t plug_type_show(struct device *dev, 1138 struct device_attribute *attr, char *buf) 1139 { 1140 struct typec_cable *cable = to_typec_cable(dev); 1141 1142 return sprintf(buf, "%s\n", typec_plug_types[cable->type]); 1143 } 1144 static DEVICE_ATTR_RO(plug_type); 1145 1146 static struct attribute *typec_cable_attrs[] = { 1147 &dev_attr_type.attr, 1148 &dev_attr_plug_type.attr, 1149 &dev_attr_usb_power_delivery_revision.attr, 1150 NULL 1151 }; 1152 ATTRIBUTE_GROUPS(typec_cable); 1153 1154 static void typec_cable_release(struct device *dev) 1155 { 1156 struct typec_cable *cable = to_typec_cable(dev); 1157 1158 kfree(cable); 1159 } 1160 1161 const struct device_type typec_cable_dev_type = { 1162 .name = "typec_cable", 1163 .groups = typec_cable_groups, 1164 .release = typec_cable_release, 1165 }; 1166 1167 static int cable_match(struct device *dev, void *data) 1168 { 1169 return is_typec_cable(dev); 1170 } 1171 1172 /** 1173 * typec_cable_get - Get a reference to the USB Type-C cable 1174 * @port: The USB Type-C Port the cable is connected to 1175 * 1176 * The caller must decrement the reference count with typec_cable_put() after 1177 * use. 1178 */ 1179 struct typec_cable *typec_cable_get(struct typec_port *port) 1180 { 1181 struct device *dev; 1182 1183 dev = device_find_child(&port->dev, NULL, cable_match); 1184 if (!dev) 1185 return NULL; 1186 1187 return to_typec_cable(dev); 1188 } 1189 EXPORT_SYMBOL_GPL(typec_cable_get); 1190 1191 /** 1192 * typec_cable_put - Decrement the reference count on USB Type-C cable 1193 * @cable: The USB Type-C cable 1194 */ 1195 void typec_cable_put(struct typec_cable *cable) 1196 { 1197 put_device(&cable->dev); 1198 } 1199 EXPORT_SYMBOL_GPL(typec_cable_put); 1200 1201 /** 1202 * typec_cable_is_active - Check is the USB Type-C cable active or passive 1203 * @cable: The USB Type-C Cable 1204 * 1205 * Return 1 if the cable is active or 0 if it's passive. 1206 */ 1207 int typec_cable_is_active(struct typec_cable *cable) 1208 { 1209 return cable->active; 1210 } 1211 EXPORT_SYMBOL_GPL(typec_cable_is_active); 1212 1213 /** 1214 * typec_cable_set_identity - Report result from Discover Identity command 1215 * @cable: The cable updated identity values 1216 * 1217 * This routine is used to report that the result of Discover Identity USB power 1218 * delivery command has become available. 1219 */ 1220 int typec_cable_set_identity(struct typec_cable *cable) 1221 { 1222 if (!cable->identity) 1223 return -EINVAL; 1224 1225 typec_report_identity(&cable->dev); 1226 return 0; 1227 } 1228 EXPORT_SYMBOL_GPL(typec_cable_set_identity); 1229 1230 /** 1231 * typec_register_cable - Register a USB Type-C Cable 1232 * @port: The USB Type-C Port the cable is connected to 1233 * @desc: Description of the cable 1234 * 1235 * Registers a device for USB Type-C Cable described in @desc. The cable will be 1236 * parent for the optional cable plug devises. 1237 * 1238 * Returns handle to the cable on success or ERR_PTR on failure. 1239 */ 1240 struct typec_cable *typec_register_cable(struct typec_port *port, 1241 struct typec_cable_desc *desc) 1242 { 1243 struct typec_cable *cable; 1244 int ret; 1245 1246 cable = kzalloc(sizeof(*cable), GFP_KERNEL); 1247 if (!cable) 1248 return ERR_PTR(-ENOMEM); 1249 1250 cable->type = desc->type; 1251 cable->active = desc->active; 1252 cable->pd_revision = desc->pd_revision; 1253 1254 if (desc->identity) { 1255 /* 1256 * Creating directory for the identity only if the driver is 1257 * able to provide data to it. 1258 */ 1259 cable->dev.groups = usb_pd_id_groups; 1260 cable->identity = desc->identity; 1261 } 1262 1263 cable->dev.class = &typec_class; 1264 cable->dev.parent = &port->dev; 1265 cable->dev.type = &typec_cable_dev_type; 1266 dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev)); 1267 1268 ret = device_register(&cable->dev); 1269 if (ret) { 1270 dev_err(&port->dev, "failed to register cable (%d)\n", ret); 1271 put_device(&cable->dev); 1272 return ERR_PTR(ret); 1273 } 1274 1275 return cable; 1276 } 1277 EXPORT_SYMBOL_GPL(typec_register_cable); 1278 1279 /** 1280 * typec_unregister_cable - Unregister a USB Type-C Cable 1281 * @cable: The cable to be unregistered 1282 * 1283 * Unregister device created with typec_register_cable(). 1284 */ 1285 void typec_unregister_cable(struct typec_cable *cable) 1286 { 1287 if (!IS_ERR_OR_NULL(cable)) 1288 device_unregister(&cable->dev); 1289 } 1290 EXPORT_SYMBOL_GPL(typec_unregister_cable); 1291 1292 /* ------------------------------------------------------------------------- */ 1293 /* USB Type-C ports */ 1294 1295 /** 1296 * typec_port_set_usb_power_delivery - Assign USB PD for port. 1297 * @port: USB Type-C port. 1298 * @pd: USB PD instance. 1299 * 1300 * This routine can be used to set the USB Power Delivery Capabilities for @port 1301 * that it will advertise to the partner. 1302 * 1303 * If @pd is NULL, the assignment is removed. 1304 */ 1305 int typec_port_set_usb_power_delivery(struct typec_port *port, struct usb_power_delivery *pd) 1306 { 1307 int ret; 1308 1309 if (IS_ERR_OR_NULL(port) || port->pd == pd) 1310 return 0; 1311 1312 if (pd) { 1313 ret = usb_power_delivery_link_device(pd, &port->dev); 1314 if (ret) 1315 return ret; 1316 } else { 1317 usb_power_delivery_unlink_device(port->pd, &port->dev); 1318 } 1319 1320 port->pd = pd; 1321 1322 return 0; 1323 } 1324 EXPORT_SYMBOL_GPL(typec_port_set_usb_power_delivery); 1325 1326 static ssize_t select_usb_power_delivery_store(struct device *dev, 1327 struct device_attribute *attr, 1328 const char *buf, size_t size) 1329 { 1330 struct typec_port *port = to_typec_port(dev); 1331 struct usb_power_delivery *pd; 1332 int ret; 1333 1334 if (!port->ops || !port->ops->pd_set) 1335 return -EOPNOTSUPP; 1336 1337 pd = usb_power_delivery_find(buf); 1338 if (!pd) 1339 return -EINVAL; 1340 1341 ret = port->ops->pd_set(port, pd); 1342 if (ret) 1343 return ret; 1344 1345 return size; 1346 } 1347 1348 static ssize_t select_usb_power_delivery_show(struct device *dev, 1349 struct device_attribute *attr, char *buf) 1350 { 1351 struct typec_port *port = to_typec_port(dev); 1352 struct usb_power_delivery **pds; 1353 int i, ret = 0; 1354 1355 if (!port->ops || !port->ops->pd_get) 1356 return -EOPNOTSUPP; 1357 1358 pds = port->ops->pd_get(port); 1359 if (!pds) 1360 return 0; 1361 1362 for (i = 0; pds[i]; i++) { 1363 if (pds[i] == port->pd) 1364 ret += sysfs_emit_at(buf, ret, "[%s] ", dev_name(&pds[i]->dev)); 1365 else 1366 ret += sysfs_emit_at(buf, ret, "%s ", dev_name(&pds[i]->dev)); 1367 } 1368 1369 buf[ret - 1] = '\n'; 1370 1371 return ret; 1372 } 1373 static DEVICE_ATTR_RW(select_usb_power_delivery); 1374 1375 static struct attribute *port_attrs[] = { 1376 &dev_attr_select_usb_power_delivery.attr, 1377 NULL 1378 }; 1379 1380 static umode_t port_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) 1381 { 1382 struct typec_port *port = to_typec_port(kobj_to_dev(kobj)); 1383 1384 if (!port->pd || !port->ops || !port->ops->pd_get) 1385 return 0; 1386 if (!port->ops->pd_set) 1387 return 0444; 1388 1389 return attr->mode; 1390 } 1391 1392 static const struct attribute_group pd_group = { 1393 .is_visible = port_attr_is_visible, 1394 .attrs = port_attrs, 1395 }; 1396 1397 static const char * const typec_orientations[] = { 1398 [TYPEC_ORIENTATION_NONE] = "unknown", 1399 [TYPEC_ORIENTATION_NORMAL] = "normal", 1400 [TYPEC_ORIENTATION_REVERSE] = "reverse", 1401 }; 1402 1403 static const char * const typec_roles[] = { 1404 [TYPEC_SINK] = "sink", 1405 [TYPEC_SOURCE] = "source", 1406 }; 1407 1408 static const char * const typec_data_roles[] = { 1409 [TYPEC_DEVICE] = "device", 1410 [TYPEC_HOST] = "host", 1411 }; 1412 1413 static const char * const typec_port_power_roles[] = { 1414 [TYPEC_PORT_SRC] = "source", 1415 [TYPEC_PORT_SNK] = "sink", 1416 [TYPEC_PORT_DRP] = "dual", 1417 }; 1418 1419 static const char * const typec_port_data_roles[] = { 1420 [TYPEC_PORT_DFP] = "host", 1421 [TYPEC_PORT_UFP] = "device", 1422 [TYPEC_PORT_DRD] = "dual", 1423 }; 1424 1425 static const char * const typec_port_types_drp[] = { 1426 [TYPEC_PORT_SRC] = "dual [source] sink", 1427 [TYPEC_PORT_SNK] = "dual source [sink]", 1428 [TYPEC_PORT_DRP] = "[dual] source sink", 1429 }; 1430 1431 static ssize_t 1432 preferred_role_store(struct device *dev, struct device_attribute *attr, 1433 const char *buf, size_t size) 1434 { 1435 struct typec_port *port = to_typec_port(dev); 1436 int role; 1437 int ret; 1438 1439 if (port->cap->type != TYPEC_PORT_DRP) { 1440 dev_dbg(dev, "Preferred role only supported with DRP ports\n"); 1441 return -EOPNOTSUPP; 1442 } 1443 1444 if (!port->ops || !port->ops->try_role) { 1445 dev_dbg(dev, "Setting preferred role not supported\n"); 1446 return -EOPNOTSUPP; 1447 } 1448 1449 role = sysfs_match_string(typec_roles, buf); 1450 if (role < 0) { 1451 if (sysfs_streq(buf, "none")) 1452 role = TYPEC_NO_PREFERRED_ROLE; 1453 else 1454 return -EINVAL; 1455 } 1456 1457 ret = port->ops->try_role(port, role); 1458 if (ret) 1459 return ret; 1460 1461 port->prefer_role = role; 1462 return size; 1463 } 1464 1465 static ssize_t 1466 preferred_role_show(struct device *dev, struct device_attribute *attr, 1467 char *buf) 1468 { 1469 struct typec_port *port = to_typec_port(dev); 1470 1471 if (port->cap->type != TYPEC_PORT_DRP) 1472 return 0; 1473 1474 if (port->prefer_role < 0) 1475 return 0; 1476 1477 return sprintf(buf, "%s\n", typec_roles[port->prefer_role]); 1478 } 1479 static DEVICE_ATTR_RW(preferred_role); 1480 1481 static ssize_t data_role_store(struct device *dev, 1482 struct device_attribute *attr, 1483 const char *buf, size_t size) 1484 { 1485 struct typec_port *port = to_typec_port(dev); 1486 int ret; 1487 1488 if (!port->ops || !port->ops->dr_set) { 1489 dev_dbg(dev, "data role swapping not supported\n"); 1490 return -EOPNOTSUPP; 1491 } 1492 1493 ret = sysfs_match_string(typec_data_roles, buf); 1494 if (ret < 0) 1495 return ret; 1496 1497 mutex_lock(&port->port_type_lock); 1498 if (port->cap->data != TYPEC_PORT_DRD) { 1499 ret = -EOPNOTSUPP; 1500 goto unlock_and_ret; 1501 } 1502 1503 ret = port->ops->dr_set(port, ret); 1504 if (ret) 1505 goto unlock_and_ret; 1506 1507 ret = size; 1508 unlock_and_ret: 1509 mutex_unlock(&port->port_type_lock); 1510 return ret; 1511 } 1512 1513 static ssize_t data_role_show(struct device *dev, 1514 struct device_attribute *attr, char *buf) 1515 { 1516 struct typec_port *port = to_typec_port(dev); 1517 1518 if (port->cap->data == TYPEC_PORT_DRD) 1519 return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ? 1520 "[host] device" : "host [device]"); 1521 1522 return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]); 1523 } 1524 static DEVICE_ATTR_RW(data_role); 1525 1526 static ssize_t power_role_store(struct device *dev, 1527 struct device_attribute *attr, 1528 const char *buf, size_t size) 1529 { 1530 struct typec_port *port = to_typec_port(dev); 1531 int ret; 1532 1533 if (!port->ops || !port->ops->pr_set) { 1534 dev_dbg(dev, "power role swapping not supported\n"); 1535 return -EOPNOTSUPP; 1536 } 1537 1538 if (port->pwr_opmode != TYPEC_PWR_MODE_PD) { 1539 dev_dbg(dev, "partner unable to swap power role\n"); 1540 return -EIO; 1541 } 1542 1543 ret = sysfs_match_string(typec_roles, buf); 1544 if (ret < 0) 1545 return ret; 1546 1547 mutex_lock(&port->port_type_lock); 1548 if (port->port_type != TYPEC_PORT_DRP) { 1549 dev_dbg(dev, "port type fixed at \"%s\"", 1550 typec_port_power_roles[port->port_type]); 1551 ret = -EOPNOTSUPP; 1552 goto unlock_and_ret; 1553 } 1554 1555 ret = port->ops->pr_set(port, ret); 1556 if (ret) 1557 goto unlock_and_ret; 1558 1559 ret = size; 1560 unlock_and_ret: 1561 mutex_unlock(&port->port_type_lock); 1562 return ret; 1563 } 1564 1565 static ssize_t power_role_show(struct device *dev, 1566 struct device_attribute *attr, char *buf) 1567 { 1568 struct typec_port *port = to_typec_port(dev); 1569 1570 if (port->cap->type == TYPEC_PORT_DRP) 1571 return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ? 1572 "[source] sink" : "source [sink]"); 1573 1574 return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]); 1575 } 1576 static DEVICE_ATTR_RW(power_role); 1577 1578 static ssize_t 1579 port_type_store(struct device *dev, struct device_attribute *attr, 1580 const char *buf, size_t size) 1581 { 1582 struct typec_port *port = to_typec_port(dev); 1583 int ret; 1584 enum typec_port_type type; 1585 1586 if (port->cap->type != TYPEC_PORT_DRP || 1587 !port->ops || !port->ops->port_type_set) { 1588 dev_dbg(dev, "changing port type not supported\n"); 1589 return -EOPNOTSUPP; 1590 } 1591 1592 ret = sysfs_match_string(typec_port_power_roles, buf); 1593 if (ret < 0) 1594 return ret; 1595 1596 type = ret; 1597 mutex_lock(&port->port_type_lock); 1598 1599 if (port->port_type == type) { 1600 ret = size; 1601 goto unlock_and_ret; 1602 } 1603 1604 ret = port->ops->port_type_set(port, type); 1605 if (ret) 1606 goto unlock_and_ret; 1607 1608 port->port_type = type; 1609 ret = size; 1610 1611 unlock_and_ret: 1612 mutex_unlock(&port->port_type_lock); 1613 return ret; 1614 } 1615 1616 static ssize_t 1617 port_type_show(struct device *dev, struct device_attribute *attr, 1618 char *buf) 1619 { 1620 struct typec_port *port = to_typec_port(dev); 1621 1622 if (port->cap->type == TYPEC_PORT_DRP) 1623 return sprintf(buf, "%s\n", 1624 typec_port_types_drp[port->port_type]); 1625 1626 return sprintf(buf, "[%s]\n", typec_port_power_roles[port->cap->type]); 1627 } 1628 static DEVICE_ATTR_RW(port_type); 1629 1630 static const char * const typec_pwr_opmodes[] = { 1631 [TYPEC_PWR_MODE_USB] = "default", 1632 [TYPEC_PWR_MODE_1_5A] = "1.5A", 1633 [TYPEC_PWR_MODE_3_0A] = "3.0A", 1634 [TYPEC_PWR_MODE_PD] = "usb_power_delivery", 1635 }; 1636 1637 static ssize_t power_operation_mode_show(struct device *dev, 1638 struct device_attribute *attr, 1639 char *buf) 1640 { 1641 struct typec_port *port = to_typec_port(dev); 1642 1643 return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]); 1644 } 1645 static DEVICE_ATTR_RO(power_operation_mode); 1646 1647 static ssize_t vconn_source_store(struct device *dev, 1648 struct device_attribute *attr, 1649 const char *buf, size_t size) 1650 { 1651 struct typec_port *port = to_typec_port(dev); 1652 bool source; 1653 int ret; 1654 1655 if (!port->cap->pd_revision) { 1656 dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n"); 1657 return -EOPNOTSUPP; 1658 } 1659 1660 if (!port->ops || !port->ops->vconn_set) { 1661 dev_dbg(dev, "VCONN swapping not supported\n"); 1662 return -EOPNOTSUPP; 1663 } 1664 1665 ret = kstrtobool(buf, &source); 1666 if (ret) 1667 return ret; 1668 1669 ret = port->ops->vconn_set(port, (enum typec_role)source); 1670 if (ret) 1671 return ret; 1672 1673 return size; 1674 } 1675 1676 static ssize_t vconn_source_show(struct device *dev, 1677 struct device_attribute *attr, char *buf) 1678 { 1679 struct typec_port *port = to_typec_port(dev); 1680 1681 return sprintf(buf, "%s\n", 1682 port->vconn_role == TYPEC_SOURCE ? "yes" : "no"); 1683 } 1684 static DEVICE_ATTR_RW(vconn_source); 1685 1686 static ssize_t supported_accessory_modes_show(struct device *dev, 1687 struct device_attribute *attr, 1688 char *buf) 1689 { 1690 struct typec_port *port = to_typec_port(dev); 1691 ssize_t ret = 0; 1692 int i; 1693 1694 for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) { 1695 if (port->cap->accessory[i]) 1696 ret += sprintf(buf + ret, "%s ", 1697 typec_accessory_modes[port->cap->accessory[i]]); 1698 } 1699 1700 if (!ret) 1701 return sprintf(buf, "none\n"); 1702 1703 buf[ret - 1] = '\n'; 1704 1705 return ret; 1706 } 1707 static DEVICE_ATTR_RO(supported_accessory_modes); 1708 1709 static ssize_t usb_typec_revision_show(struct device *dev, 1710 struct device_attribute *attr, 1711 char *buf) 1712 { 1713 struct typec_port *port = to_typec_port(dev); 1714 u16 rev = port->cap->revision; 1715 1716 return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1717 } 1718 static DEVICE_ATTR_RO(usb_typec_revision); 1719 1720 static ssize_t usb_power_delivery_revision_show(struct device *dev, 1721 struct device_attribute *attr, 1722 char *buf) 1723 { 1724 u16 rev = 0; 1725 1726 if (is_typec_partner(dev)) { 1727 struct typec_partner *partner = to_typec_partner(dev); 1728 1729 rev = partner->pd_revision; 1730 } else if (is_typec_cable(dev)) { 1731 struct typec_cable *cable = to_typec_cable(dev); 1732 1733 rev = cable->pd_revision; 1734 } else if (is_typec_port(dev)) { 1735 struct typec_port *p = to_typec_port(dev); 1736 1737 rev = p->cap->pd_revision; 1738 } 1739 return sysfs_emit(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf); 1740 } 1741 1742 static ssize_t orientation_show(struct device *dev, 1743 struct device_attribute *attr, 1744 char *buf) 1745 { 1746 struct typec_port *port = to_typec_port(dev); 1747 1748 return sprintf(buf, "%s\n", typec_orientations[port->orientation]); 1749 } 1750 static DEVICE_ATTR_RO(orientation); 1751 1752 static struct attribute *typec_attrs[] = { 1753 &dev_attr_data_role.attr, 1754 &dev_attr_power_operation_mode.attr, 1755 &dev_attr_power_role.attr, 1756 &dev_attr_preferred_role.attr, 1757 &dev_attr_supported_accessory_modes.attr, 1758 &dev_attr_usb_power_delivery_revision.attr, 1759 &dev_attr_usb_typec_revision.attr, 1760 &dev_attr_vconn_source.attr, 1761 &dev_attr_port_type.attr, 1762 &dev_attr_orientation.attr, 1763 NULL, 1764 }; 1765 1766 static umode_t typec_attr_is_visible(struct kobject *kobj, 1767 struct attribute *attr, int n) 1768 { 1769 struct typec_port *port = to_typec_port(kobj_to_dev(kobj)); 1770 1771 if (attr == &dev_attr_data_role.attr) { 1772 if (port->cap->data != TYPEC_PORT_DRD || 1773 !port->ops || !port->ops->dr_set) 1774 return 0444; 1775 } else if (attr == &dev_attr_power_role.attr) { 1776 if (port->cap->type != TYPEC_PORT_DRP || 1777 !port->ops || !port->ops->pr_set) 1778 return 0444; 1779 } else if (attr == &dev_attr_vconn_source.attr) { 1780 if (!port->cap->pd_revision || 1781 !port->ops || !port->ops->vconn_set) 1782 return 0444; 1783 } else if (attr == &dev_attr_preferred_role.attr) { 1784 if (port->cap->type != TYPEC_PORT_DRP || 1785 !port->ops || !port->ops->try_role) 1786 return 0444; 1787 } else if (attr == &dev_attr_port_type.attr) { 1788 if (!port->ops || !port->ops->port_type_set) 1789 return 0; 1790 if (port->cap->type != TYPEC_PORT_DRP) 1791 return 0444; 1792 } else if (attr == &dev_attr_orientation.attr) { 1793 if (port->cap->orientation_aware) 1794 return 0444; 1795 return 0; 1796 } 1797 1798 return attr->mode; 1799 } 1800 1801 static const struct attribute_group typec_group = { 1802 .is_visible = typec_attr_is_visible, 1803 .attrs = typec_attrs, 1804 }; 1805 1806 static const struct attribute_group *typec_groups[] = { 1807 &typec_group, 1808 &pd_group, 1809 NULL 1810 }; 1811 1812 static int typec_uevent(const struct device *dev, struct kobj_uevent_env *env) 1813 { 1814 int ret; 1815 1816 ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev)); 1817 if (ret) 1818 dev_err(dev, "failed to add uevent TYPEC_PORT\n"); 1819 1820 return ret; 1821 } 1822 1823 static void typec_release(struct device *dev) 1824 { 1825 struct typec_port *port = to_typec_port(dev); 1826 1827 ida_free(&typec_index_ida, port->id); 1828 ida_destroy(&port->mode_ids); 1829 typec_switch_put(port->sw); 1830 typec_mux_put(port->mux); 1831 typec_retimer_put(port->retimer); 1832 kfree(port->cap); 1833 kfree(port); 1834 } 1835 1836 const struct device_type typec_port_dev_type = { 1837 .name = "typec_port", 1838 .groups = typec_groups, 1839 .uevent = typec_uevent, 1840 .release = typec_release, 1841 }; 1842 1843 /* --------------------------------------- */ 1844 /* Driver callbacks to report role updates */ 1845 1846 static int partner_match(struct device *dev, void *data) 1847 { 1848 return is_typec_partner(dev); 1849 } 1850 1851 static struct typec_partner *typec_get_partner(struct typec_port *port) 1852 { 1853 struct device *dev; 1854 1855 dev = device_find_child(&port->dev, NULL, partner_match); 1856 if (!dev) 1857 return NULL; 1858 1859 return to_typec_partner(dev); 1860 } 1861 1862 static void typec_partner_attach(struct typec_connector *con, struct device *dev) 1863 { 1864 struct typec_port *port = container_of(con, struct typec_port, con); 1865 struct typec_partner *partner = typec_get_partner(port); 1866 struct usb_device *udev = to_usb_device(dev); 1867 1868 if (udev->speed < USB_SPEED_SUPER) 1869 port->usb2_dev = dev; 1870 else 1871 port->usb3_dev = dev; 1872 1873 if (partner) { 1874 typec_partner_link_device(partner, dev); 1875 put_device(&partner->dev); 1876 } 1877 } 1878 1879 static void typec_partner_deattach(struct typec_connector *con, struct device *dev) 1880 { 1881 struct typec_port *port = container_of(con, struct typec_port, con); 1882 struct typec_partner *partner = typec_get_partner(port); 1883 1884 if (partner) { 1885 typec_partner_unlink_device(partner, dev); 1886 put_device(&partner->dev); 1887 } 1888 1889 if (port->usb2_dev == dev) 1890 port->usb2_dev = NULL; 1891 else if (port->usb3_dev == dev) 1892 port->usb3_dev = NULL; 1893 } 1894 1895 /** 1896 * typec_set_data_role - Report data role change 1897 * @port: The USB Type-C Port where the role was changed 1898 * @role: The new data role 1899 * 1900 * This routine is used by the port drivers to report data role changes. 1901 */ 1902 void typec_set_data_role(struct typec_port *port, enum typec_data_role role) 1903 { 1904 struct typec_partner *partner; 1905 1906 if (port->data_role == role) 1907 return; 1908 1909 port->data_role = role; 1910 sysfs_notify(&port->dev.kobj, NULL, "data_role"); 1911 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1912 1913 partner = typec_get_partner(port); 1914 if (!partner) 1915 return; 1916 1917 if (partner->identity) 1918 typec_product_type_notify(&partner->dev); 1919 1920 put_device(&partner->dev); 1921 } 1922 EXPORT_SYMBOL_GPL(typec_set_data_role); 1923 1924 /** 1925 * typec_set_pwr_role - Report power role change 1926 * @port: The USB Type-C Port where the role was changed 1927 * @role: The new data role 1928 * 1929 * This routine is used by the port drivers to report power role changes. 1930 */ 1931 void typec_set_pwr_role(struct typec_port *port, enum typec_role role) 1932 { 1933 if (port->pwr_role == role) 1934 return; 1935 1936 port->pwr_role = role; 1937 sysfs_notify(&port->dev.kobj, NULL, "power_role"); 1938 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1939 } 1940 EXPORT_SYMBOL_GPL(typec_set_pwr_role); 1941 1942 /** 1943 * typec_set_vconn_role - Report VCONN source change 1944 * @port: The USB Type-C Port which VCONN role changed 1945 * @role: Source when @port is sourcing VCONN, or Sink when it's not 1946 * 1947 * This routine is used by the port drivers to report if the VCONN source is 1948 * changes. 1949 */ 1950 void typec_set_vconn_role(struct typec_port *port, enum typec_role role) 1951 { 1952 if (port->vconn_role == role) 1953 return; 1954 1955 port->vconn_role = role; 1956 sysfs_notify(&port->dev.kobj, NULL, "vconn_source"); 1957 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1958 } 1959 EXPORT_SYMBOL_GPL(typec_set_vconn_role); 1960 1961 /** 1962 * typec_set_pwr_opmode - Report changed power operation mode 1963 * @port: The USB Type-C Port where the mode was changed 1964 * @opmode: New power operation mode 1965 * 1966 * This routine is used by the port drivers to report changed power operation 1967 * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB 1968 * Type-C specification, and "USB Power Delivery" when the power levels are 1969 * negotiated with methods defined in USB Power Delivery specification. 1970 */ 1971 void typec_set_pwr_opmode(struct typec_port *port, 1972 enum typec_pwr_opmode opmode) 1973 { 1974 struct device *partner_dev; 1975 1976 if (port->pwr_opmode == opmode) 1977 return; 1978 1979 port->pwr_opmode = opmode; 1980 sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode"); 1981 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 1982 1983 partner_dev = device_find_child(&port->dev, NULL, partner_match); 1984 if (partner_dev) { 1985 struct typec_partner *partner = to_typec_partner(partner_dev); 1986 1987 if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) { 1988 partner->usb_pd = 1; 1989 sysfs_notify(&partner_dev->kobj, NULL, 1990 "supports_usb_power_delivery"); 1991 kobject_uevent(&partner_dev->kobj, KOBJ_CHANGE); 1992 } 1993 put_device(partner_dev); 1994 } 1995 } 1996 EXPORT_SYMBOL_GPL(typec_set_pwr_opmode); 1997 1998 /** 1999 * typec_find_pwr_opmode - Get the typec power operation mode capability 2000 * @name: power operation mode string 2001 * 2002 * This routine is used to find the typec_pwr_opmode by its string @name. 2003 * 2004 * Returns typec_pwr_opmode if success, otherwise negative error code. 2005 */ 2006 int typec_find_pwr_opmode(const char *name) 2007 { 2008 return match_string(typec_pwr_opmodes, 2009 ARRAY_SIZE(typec_pwr_opmodes), name); 2010 } 2011 EXPORT_SYMBOL_GPL(typec_find_pwr_opmode); 2012 2013 /** 2014 * typec_find_orientation - Convert orientation string to enum typec_orientation 2015 * @name: Orientation string 2016 * 2017 * This routine is used to find the typec_orientation by its string name @name. 2018 * 2019 * Returns the orientation value on success, otherwise negative error code. 2020 */ 2021 int typec_find_orientation(const char *name) 2022 { 2023 return match_string(typec_orientations, ARRAY_SIZE(typec_orientations), 2024 name); 2025 } 2026 EXPORT_SYMBOL_GPL(typec_find_orientation); 2027 2028 /** 2029 * typec_find_port_power_role - Get the typec port power capability 2030 * @name: port power capability string 2031 * 2032 * This routine is used to find the typec_port_type by its string name. 2033 * 2034 * Returns typec_port_type if success, otherwise negative error code. 2035 */ 2036 int typec_find_port_power_role(const char *name) 2037 { 2038 return match_string(typec_port_power_roles, 2039 ARRAY_SIZE(typec_port_power_roles), name); 2040 } 2041 EXPORT_SYMBOL_GPL(typec_find_port_power_role); 2042 2043 /** 2044 * typec_find_power_role - Find the typec one specific power role 2045 * @name: power role string 2046 * 2047 * This routine is used to find the typec_role by its string name. 2048 * 2049 * Returns typec_role if success, otherwise negative error code. 2050 */ 2051 int typec_find_power_role(const char *name) 2052 { 2053 return match_string(typec_roles, ARRAY_SIZE(typec_roles), name); 2054 } 2055 EXPORT_SYMBOL_GPL(typec_find_power_role); 2056 2057 /** 2058 * typec_find_port_data_role - Get the typec port data capability 2059 * @name: port data capability string 2060 * 2061 * This routine is used to find the typec_port_data by its string name. 2062 * 2063 * Returns typec_port_data if success, otherwise negative error code. 2064 */ 2065 int typec_find_port_data_role(const char *name) 2066 { 2067 return match_string(typec_port_data_roles, 2068 ARRAY_SIZE(typec_port_data_roles), name); 2069 } 2070 EXPORT_SYMBOL_GPL(typec_find_port_data_role); 2071 2072 /* ------------------------------------------ */ 2073 /* API for Multiplexer/DeMultiplexer Switches */ 2074 2075 /** 2076 * typec_set_orientation - Set USB Type-C cable plug orientation 2077 * @port: USB Type-C Port 2078 * @orientation: USB Type-C cable plug orientation 2079 * 2080 * Set cable plug orientation for @port. 2081 */ 2082 int typec_set_orientation(struct typec_port *port, 2083 enum typec_orientation orientation) 2084 { 2085 int ret; 2086 2087 ret = typec_switch_set(port->sw, orientation); 2088 if (ret) 2089 return ret; 2090 2091 port->orientation = orientation; 2092 sysfs_notify(&port->dev.kobj, NULL, "orientation"); 2093 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE); 2094 2095 return 0; 2096 } 2097 EXPORT_SYMBOL_GPL(typec_set_orientation); 2098 2099 /** 2100 * typec_get_orientation - Get USB Type-C cable plug orientation 2101 * @port: USB Type-C Port 2102 * 2103 * Get current cable plug orientation for @port. 2104 */ 2105 enum typec_orientation typec_get_orientation(struct typec_port *port) 2106 { 2107 return port->orientation; 2108 } 2109 EXPORT_SYMBOL_GPL(typec_get_orientation); 2110 2111 /** 2112 * typec_set_mode - Set mode of operation for USB Type-C connector 2113 * @port: USB Type-C connector 2114 * @mode: Accessory Mode, USB Operation or Safe State 2115 * 2116 * Configure @port for Accessory Mode @mode. This function will configure the 2117 * muxes needed for @mode. 2118 */ 2119 int typec_set_mode(struct typec_port *port, int mode) 2120 { 2121 struct typec_mux_state state = { }; 2122 2123 state.mode = mode; 2124 2125 return typec_mux_set(port->mux, &state); 2126 } 2127 EXPORT_SYMBOL_GPL(typec_set_mode); 2128 2129 /* --------------------------------------- */ 2130 2131 /** 2132 * typec_get_negotiated_svdm_version - Get negotiated SVDM Version 2133 * @port: USB Type-C Port. 2134 * 2135 * Get the negotiated SVDM Version. The Version is set to the port default 2136 * value stored in typec_capability on partner registration, and updated after 2137 * a successful Discover Identity if the negotiated value is less than the 2138 * default value. 2139 * 2140 * Returns usb_pd_svdm_ver if the partner has been registered otherwise -ENODEV. 2141 */ 2142 int typec_get_negotiated_svdm_version(struct typec_port *port) 2143 { 2144 enum usb_pd_svdm_ver svdm_version; 2145 struct device *partner_dev; 2146 2147 partner_dev = device_find_child(&port->dev, NULL, partner_match); 2148 if (!partner_dev) 2149 return -ENODEV; 2150 2151 svdm_version = to_typec_partner(partner_dev)->svdm_version; 2152 put_device(partner_dev); 2153 2154 return svdm_version; 2155 } 2156 EXPORT_SYMBOL_GPL(typec_get_negotiated_svdm_version); 2157 2158 /** 2159 * typec_get_cable_svdm_version - Get cable negotiated SVDM Version 2160 * @port: USB Type-C Port. 2161 * 2162 * Get the negotiated SVDM Version for the cable. The Version is set to the port 2163 * default value based on the PD Revision during cable registration, and updated 2164 * after a successful Discover Identity if the negotiated value is less than the 2165 * default. 2166 * 2167 * Returns usb_pd_svdm_ver if the cable has been registered otherwise -ENODEV. 2168 */ 2169 int typec_get_cable_svdm_version(struct typec_port *port) 2170 { 2171 enum usb_pd_svdm_ver svdm_version; 2172 struct device *cable_dev; 2173 2174 cable_dev = device_find_child(&port->dev, NULL, cable_match); 2175 if (!cable_dev) 2176 return -ENODEV; 2177 2178 svdm_version = to_typec_cable(cable_dev)->svdm_version; 2179 put_device(cable_dev); 2180 2181 return svdm_version; 2182 } 2183 EXPORT_SYMBOL_GPL(typec_get_cable_svdm_version); 2184 2185 /** 2186 * typec_cable_set_svdm_version - Set negotiated Structured VDM (SVDM) Version 2187 * @cable: USB Type-C Active Cable that supports SVDM 2188 * @svdm_version: Negotiated SVDM Version 2189 * 2190 * This routine is used to save the negotiated SVDM Version. 2191 */ 2192 void typec_cable_set_svdm_version(struct typec_cable *cable, enum usb_pd_svdm_ver svdm_version) 2193 { 2194 cable->svdm_version = svdm_version; 2195 } 2196 EXPORT_SYMBOL_GPL(typec_cable_set_svdm_version); 2197 2198 /** 2199 * typec_get_drvdata - Return private driver data pointer 2200 * @port: USB Type-C port 2201 */ 2202 void *typec_get_drvdata(struct typec_port *port) 2203 { 2204 return dev_get_drvdata(&port->dev); 2205 } 2206 EXPORT_SYMBOL_GPL(typec_get_drvdata); 2207 2208 int typec_get_fw_cap(struct typec_capability *cap, 2209 struct fwnode_handle *fwnode) 2210 { 2211 const char *cap_str; 2212 int ret; 2213 2214 cap->fwnode = fwnode; 2215 2216 ret = fwnode_property_read_string(fwnode, "power-role", &cap_str); 2217 if (ret < 0) 2218 return ret; 2219 2220 ret = typec_find_port_power_role(cap_str); 2221 if (ret < 0) 2222 return ret; 2223 cap->type = ret; 2224 2225 /* USB data support is optional */ 2226 ret = fwnode_property_read_string(fwnode, "data-role", &cap_str); 2227 if (ret == 0) { 2228 ret = typec_find_port_data_role(cap_str); 2229 if (ret < 0) 2230 return ret; 2231 cap->data = ret; 2232 } 2233 2234 /* Get the preferred power role for a DRP */ 2235 if (cap->type == TYPEC_PORT_DRP) { 2236 cap->prefer_role = TYPEC_NO_PREFERRED_ROLE; 2237 2238 ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str); 2239 if (ret == 0) { 2240 ret = typec_find_power_role(cap_str); 2241 if (ret < 0) 2242 return ret; 2243 cap->prefer_role = ret; 2244 } 2245 } 2246 2247 return 0; 2248 } 2249 EXPORT_SYMBOL_GPL(typec_get_fw_cap); 2250 2251 /** 2252 * typec_port_register_altmode - Register USB Type-C Port Alternate Mode 2253 * @port: USB Type-C Port that supports the alternate mode 2254 * @desc: Description of the alternate mode 2255 * 2256 * This routine is used to register an alternate mode that @port is capable of 2257 * supporting. 2258 * 2259 * Returns handle to the alternate mode on success or ERR_PTR on failure. 2260 */ 2261 struct typec_altmode * 2262 typec_port_register_altmode(struct typec_port *port, 2263 const struct typec_altmode_desc *desc) 2264 { 2265 struct typec_altmode *adev; 2266 struct typec_mux *mux; 2267 struct typec_retimer *retimer; 2268 2269 mux = typec_mux_get(&port->dev); 2270 if (IS_ERR(mux)) 2271 return ERR_CAST(mux); 2272 2273 retimer = typec_retimer_get(&port->dev); 2274 if (IS_ERR(retimer)) { 2275 typec_mux_put(mux); 2276 return ERR_CAST(retimer); 2277 } 2278 2279 adev = typec_register_altmode(&port->dev, desc); 2280 if (IS_ERR(adev)) { 2281 typec_retimer_put(retimer); 2282 typec_mux_put(mux); 2283 } else { 2284 to_altmode(adev)->mux = mux; 2285 to_altmode(adev)->retimer = retimer; 2286 } 2287 2288 return adev; 2289 } 2290 EXPORT_SYMBOL_GPL(typec_port_register_altmode); 2291 2292 void typec_port_register_altmodes(struct typec_port *port, 2293 const struct typec_altmode_ops *ops, void *drvdata, 2294 struct typec_altmode **altmodes, size_t n) 2295 { 2296 struct fwnode_handle *altmodes_node, *child; 2297 struct typec_altmode_desc desc; 2298 struct typec_altmode *alt; 2299 size_t index = 0; 2300 u16 svid; 2301 u32 vdo; 2302 int ret; 2303 2304 altmodes_node = device_get_named_child_node(&port->dev, "altmodes"); 2305 if (!altmodes_node) 2306 return; /* No altmodes specified */ 2307 2308 fwnode_for_each_child_node(altmodes_node, child) { 2309 ret = fwnode_property_read_u16(child, "svid", &svid); 2310 if (ret) { 2311 dev_err(&port->dev, "Error reading svid for altmode %s\n", 2312 fwnode_get_name(child)); 2313 continue; 2314 } 2315 2316 ret = fwnode_property_read_u32(child, "vdo", &vdo); 2317 if (ret) { 2318 dev_err(&port->dev, "Error reading vdo for altmode %s\n", 2319 fwnode_get_name(child)); 2320 continue; 2321 } 2322 2323 if (index >= n) { 2324 dev_err(&port->dev, "Error not enough space for altmode %s\n", 2325 fwnode_get_name(child)); 2326 continue; 2327 } 2328 2329 desc.svid = svid; 2330 desc.vdo = vdo; 2331 desc.mode = index + 1; 2332 alt = typec_port_register_altmode(port, &desc); 2333 if (IS_ERR(alt)) { 2334 dev_err(&port->dev, "Error registering altmode %s\n", 2335 fwnode_get_name(child)); 2336 continue; 2337 } 2338 2339 typec_altmode_set_ops(alt, ops); 2340 typec_altmode_set_drvdata(alt, drvdata); 2341 altmodes[index] = alt; 2342 index++; 2343 } 2344 } 2345 EXPORT_SYMBOL_GPL(typec_port_register_altmodes); 2346 2347 /** 2348 * typec_port_register_cable_ops - Register typec_cable_ops to port altmodes 2349 * @altmodes: USB Type-C Port's altmode vector 2350 * @max_altmodes: The maximum number of alt modes supported by the port 2351 * @ops: Cable alternate mode vector 2352 */ 2353 void typec_port_register_cable_ops(struct typec_altmode **altmodes, int max_altmodes, 2354 const struct typec_cable_ops *ops) 2355 { 2356 int i; 2357 2358 for (i = 0; i < max_altmodes; i++) { 2359 if (!altmodes[i]) 2360 return; 2361 altmodes[i]->cable_ops = ops; 2362 } 2363 } 2364 EXPORT_SYMBOL_GPL(typec_port_register_cable_ops); 2365 2366 /** 2367 * typec_register_port - Register a USB Type-C Port 2368 * @parent: Parent device 2369 * @cap: Description of the port 2370 * 2371 * Registers a device for USB Type-C Port described in @cap. 2372 * 2373 * Returns handle to the port on success or ERR_PTR on failure. 2374 */ 2375 struct typec_port *typec_register_port(struct device *parent, 2376 const struct typec_capability *cap) 2377 { 2378 struct typec_port *port; 2379 int ret; 2380 int id; 2381 2382 port = kzalloc(sizeof(*port), GFP_KERNEL); 2383 if (!port) 2384 return ERR_PTR(-ENOMEM); 2385 2386 id = ida_alloc(&typec_index_ida, GFP_KERNEL); 2387 if (id < 0) { 2388 kfree(port); 2389 return ERR_PTR(id); 2390 } 2391 2392 switch (cap->type) { 2393 case TYPEC_PORT_SRC: 2394 port->pwr_role = TYPEC_SOURCE; 2395 port->vconn_role = TYPEC_SOURCE; 2396 break; 2397 case TYPEC_PORT_SNK: 2398 port->pwr_role = TYPEC_SINK; 2399 port->vconn_role = TYPEC_SINK; 2400 break; 2401 case TYPEC_PORT_DRP: 2402 if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE) 2403 port->pwr_role = cap->prefer_role; 2404 else 2405 port->pwr_role = TYPEC_SINK; 2406 break; 2407 } 2408 2409 switch (cap->data) { 2410 case TYPEC_PORT_DFP: 2411 port->data_role = TYPEC_HOST; 2412 break; 2413 case TYPEC_PORT_UFP: 2414 port->data_role = TYPEC_DEVICE; 2415 break; 2416 case TYPEC_PORT_DRD: 2417 if (cap->prefer_role == TYPEC_SOURCE) 2418 port->data_role = TYPEC_HOST; 2419 else 2420 port->data_role = TYPEC_DEVICE; 2421 break; 2422 } 2423 2424 ida_init(&port->mode_ids); 2425 mutex_init(&port->port_type_lock); 2426 2427 port->id = id; 2428 port->ops = cap->ops; 2429 port->port_type = cap->type; 2430 port->prefer_role = cap->prefer_role; 2431 port->con.attach = typec_partner_attach; 2432 port->con.deattach = typec_partner_deattach; 2433 2434 device_initialize(&port->dev); 2435 port->dev.class = &typec_class; 2436 port->dev.parent = parent; 2437 port->dev.fwnode = cap->fwnode; 2438 port->dev.type = &typec_port_dev_type; 2439 dev_set_name(&port->dev, "port%d", id); 2440 dev_set_drvdata(&port->dev, cap->driver_data); 2441 2442 port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL); 2443 if (!port->cap) { 2444 put_device(&port->dev); 2445 return ERR_PTR(-ENOMEM); 2446 } 2447 2448 port->sw = typec_switch_get(&port->dev); 2449 if (IS_ERR(port->sw)) { 2450 ret = PTR_ERR(port->sw); 2451 put_device(&port->dev); 2452 return ERR_PTR(ret); 2453 } 2454 2455 port->mux = typec_mux_get(&port->dev); 2456 if (IS_ERR(port->mux)) { 2457 ret = PTR_ERR(port->mux); 2458 put_device(&port->dev); 2459 return ERR_PTR(ret); 2460 } 2461 2462 port->retimer = typec_retimer_get(&port->dev); 2463 if (IS_ERR(port->retimer)) { 2464 ret = PTR_ERR(port->retimer); 2465 put_device(&port->dev); 2466 return ERR_PTR(ret); 2467 } 2468 2469 port->pd = cap->pd; 2470 2471 ret = device_add(&port->dev); 2472 if (ret) { 2473 dev_err(parent, "failed to register port (%d)\n", ret); 2474 put_device(&port->dev); 2475 return ERR_PTR(ret); 2476 } 2477 2478 ret = usb_power_delivery_link_device(port->pd, &port->dev); 2479 if (ret) { 2480 dev_err(&port->dev, "failed to link pd\n"); 2481 device_unregister(&port->dev); 2482 return ERR_PTR(ret); 2483 } 2484 2485 ret = typec_link_ports(port); 2486 if (ret) 2487 dev_warn(&port->dev, "failed to create symlinks (%d)\n", ret); 2488 2489 return port; 2490 } 2491 EXPORT_SYMBOL_GPL(typec_register_port); 2492 2493 /** 2494 * typec_unregister_port - Unregister a USB Type-C Port 2495 * @port: The port to be unregistered 2496 * 2497 * Unregister device created with typec_register_port(). 2498 */ 2499 void typec_unregister_port(struct typec_port *port) 2500 { 2501 if (!IS_ERR_OR_NULL(port)) { 2502 typec_unlink_ports(port); 2503 typec_port_set_usb_power_delivery(port, NULL); 2504 device_unregister(&port->dev); 2505 } 2506 } 2507 EXPORT_SYMBOL_GPL(typec_unregister_port); 2508 2509 static int __init typec_init(void) 2510 { 2511 int ret; 2512 2513 ret = bus_register(&typec_bus); 2514 if (ret) 2515 return ret; 2516 2517 ret = class_register(&typec_mux_class); 2518 if (ret) 2519 goto err_unregister_bus; 2520 2521 ret = class_register(&retimer_class); 2522 if (ret) 2523 goto err_unregister_mux_class; 2524 2525 ret = class_register(&typec_class); 2526 if (ret) 2527 goto err_unregister_retimer_class; 2528 2529 ret = usb_power_delivery_init(); 2530 if (ret) 2531 goto err_unregister_class; 2532 2533 return 0; 2534 2535 err_unregister_class: 2536 class_unregister(&typec_class); 2537 2538 err_unregister_retimer_class: 2539 class_unregister(&retimer_class); 2540 2541 err_unregister_mux_class: 2542 class_unregister(&typec_mux_class); 2543 2544 err_unregister_bus: 2545 bus_unregister(&typec_bus); 2546 2547 return ret; 2548 } 2549 subsys_initcall(typec_init); 2550 2551 static void __exit typec_exit(void) 2552 { 2553 usb_power_delivery_exit(); 2554 class_unregister(&typec_class); 2555 ida_destroy(&typec_index_ida); 2556 bus_unregister(&typec_bus); 2557 class_unregister(&typec_mux_class); 2558 class_unregister(&retimer_class); 2559 } 2560 module_exit(typec_exit); 2561 2562 MODULE_AUTHOR("Heikki Krogerus <[email protected]>"); 2563 MODULE_LICENSE("GPL v2"); 2564 MODULE_DESCRIPTION("USB Type-C Connector Class"); 2565