linux/drivers/usb/typec/class.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * USB Type-C Connector Class
   4 *
   5 * Copyright (C) 2017, Intel Corporation
   6 * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/mutex.h>
  11#include <linux/property.h>
  12#include <linux/slab.h>
  13#include <linux/usb/pd_vdo.h>
  14#include <linux/usb/typec_mux.h>
  15
  16#include "bus.h"
  17#include "class.h"
  18
  19static DEFINE_IDA(typec_index_ida);
  20
  21struct class typec_class = {
  22        .name = "typec",
  23        .owner = THIS_MODULE,
  24};
  25
  26/* ------------------------------------------------------------------------- */
  27/* Common attributes */
  28
  29static const char * const typec_accessory_modes[] = {
  30        [TYPEC_ACCESSORY_NONE]          = "none",
  31        [TYPEC_ACCESSORY_AUDIO]         = "analog_audio",
  32        [TYPEC_ACCESSORY_DEBUG]         = "debug",
  33};
  34
  35/* Product types defined in USB PD Specification R3.0 V2.0 */
  36static const char * const product_type_ufp[8] = {
  37        [IDH_PTYPE_NOT_UFP]             = "not_ufp",
  38        [IDH_PTYPE_HUB]                 = "hub",
  39        [IDH_PTYPE_PERIPH]              = "peripheral",
  40        [IDH_PTYPE_PSD]                 = "psd",
  41        [IDH_PTYPE_AMA]                 = "ama",
  42};
  43
  44static const char * const product_type_dfp[8] = {
  45        [IDH_PTYPE_NOT_DFP]             = "not_dfp",
  46        [IDH_PTYPE_DFP_HUB]             = "hub",
  47        [IDH_PTYPE_DFP_HOST]            = "host",
  48        [IDH_PTYPE_DFP_PB]              = "power_brick",
  49};
  50
  51static const char * const product_type_cable[8] = {
  52        [IDH_PTYPE_NOT_CABLE]           = "not_cable",
  53        [IDH_PTYPE_PCABLE]              = "passive",
  54        [IDH_PTYPE_ACABLE]              = "active",
  55        [IDH_PTYPE_VPD]                 = "vpd",
  56};
  57
  58static struct usb_pd_identity *get_pd_identity(struct device *dev)
  59{
  60        if (is_typec_partner(dev)) {
  61                struct typec_partner *partner = to_typec_partner(dev);
  62
  63                return partner->identity;
  64        } else if (is_typec_cable(dev)) {
  65                struct typec_cable *cable = to_typec_cable(dev);
  66
  67                return cable->identity;
  68        }
  69        return NULL;
  70}
  71
  72static const char *get_pd_product_type(struct device *dev)
  73{
  74        struct typec_port *port = to_typec_port(dev->parent);
  75        struct usb_pd_identity *id = get_pd_identity(dev);
  76        const char *ptype = NULL;
  77
  78        if (is_typec_partner(dev)) {
  79                if (!id)
  80                        return NULL;
  81
  82                if (port->data_role == TYPEC_HOST)
  83                        ptype = product_type_ufp[PD_IDH_PTYPE(id->id_header)];
  84                else
  85                        ptype = product_type_dfp[PD_IDH_DFP_PTYPE(id->id_header)];
  86        } else if (is_typec_cable(dev)) {
  87                if (id)
  88                        ptype = product_type_cable[PD_IDH_PTYPE(id->id_header)];
  89                else
  90                        ptype = to_typec_cable(dev)->active ?
  91                                product_type_cable[IDH_PTYPE_ACABLE] :
  92                                product_type_cable[IDH_PTYPE_PCABLE];
  93        }
  94
  95        return ptype;
  96}
  97
  98static ssize_t id_header_show(struct device *dev, struct device_attribute *attr,
  99                              char *buf)
 100{
 101        struct usb_pd_identity *id = get_pd_identity(dev);
 102
 103        return sprintf(buf, "0x%08x\n", id->id_header);
 104}
 105static DEVICE_ATTR_RO(id_header);
 106
 107static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr,
 108                              char *buf)
 109{
 110        struct usb_pd_identity *id = get_pd_identity(dev);
 111
 112        return sprintf(buf, "0x%08x\n", id->cert_stat);
 113}
 114static DEVICE_ATTR_RO(cert_stat);
 115
 116static ssize_t product_show(struct device *dev, struct device_attribute *attr,
 117                            char *buf)
 118{
 119        struct usb_pd_identity *id = get_pd_identity(dev);
 120
 121        return sprintf(buf, "0x%08x\n", id->product);
 122}
 123static DEVICE_ATTR_RO(product);
 124
 125static ssize_t product_type_vdo1_show(struct device *dev, struct device_attribute *attr,
 126                                      char *buf)
 127{
 128        struct usb_pd_identity *id = get_pd_identity(dev);
 129
 130        return sysfs_emit(buf, "0x%08x\n", id->vdo[0]);
 131}
 132static DEVICE_ATTR_RO(product_type_vdo1);
 133
 134static ssize_t product_type_vdo2_show(struct device *dev, struct device_attribute *attr,
 135                                      char *buf)
 136{
 137        struct usb_pd_identity *id = get_pd_identity(dev);
 138
 139        return sysfs_emit(buf, "0x%08x\n", id->vdo[1]);
 140}
 141static DEVICE_ATTR_RO(product_type_vdo2);
 142
 143static ssize_t product_type_vdo3_show(struct device *dev, struct device_attribute *attr,
 144                                      char *buf)
 145{
 146        struct usb_pd_identity *id = get_pd_identity(dev);
 147
 148        return sysfs_emit(buf, "0x%08x\n", id->vdo[2]);
 149}
 150static DEVICE_ATTR_RO(product_type_vdo3);
 151
 152static struct attribute *usb_pd_id_attrs[] = {
 153        &dev_attr_id_header.attr,
 154        &dev_attr_cert_stat.attr,
 155        &dev_attr_product.attr,
 156        &dev_attr_product_type_vdo1.attr,
 157        &dev_attr_product_type_vdo2.attr,
 158        &dev_attr_product_type_vdo3.attr,
 159        NULL
 160};
 161
 162static const struct attribute_group usb_pd_id_group = {
 163        .name = "identity",
 164        .attrs = usb_pd_id_attrs,
 165};
 166
 167static const struct attribute_group *usb_pd_id_groups[] = {
 168        &usb_pd_id_group,
 169        NULL,
 170};
 171
 172static void typec_product_type_notify(struct device *dev)
 173{
 174        char *envp[2] = { };
 175        const char *ptype;
 176
 177        ptype = get_pd_product_type(dev);
 178        if (!ptype)
 179                return;
 180
 181        sysfs_notify(&dev->kobj, NULL, "type");
 182
 183        envp[0] = kasprintf(GFP_KERNEL, "PRODUCT_TYPE=%s", ptype);
 184        if (!envp[0])
 185                return;
 186
 187        kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp);
 188        kfree(envp[0]);
 189}
 190
 191static void typec_report_identity(struct device *dev)
 192{
 193        sysfs_notify(&dev->kobj, "identity", "id_header");
 194        sysfs_notify(&dev->kobj, "identity", "cert_stat");
 195        sysfs_notify(&dev->kobj, "identity", "product");
 196        sysfs_notify(&dev->kobj, "identity", "product_type_vdo1");
 197        sysfs_notify(&dev->kobj, "identity", "product_type_vdo2");
 198        sysfs_notify(&dev->kobj, "identity", "product_type_vdo3");
 199        typec_product_type_notify(dev);
 200}
 201
 202static ssize_t
 203type_show(struct device *dev, struct device_attribute *attr, char *buf)
 204{
 205        const char *ptype;
 206
 207        ptype = get_pd_product_type(dev);
 208        if (!ptype)
 209                return 0;
 210
 211        return sysfs_emit(buf, "%s\n", ptype);
 212}
 213static DEVICE_ATTR_RO(type);
 214
 215static ssize_t usb_power_delivery_revision_show(struct device *dev,
 216                                                struct device_attribute *attr,
 217                                                char *buf);
 218static DEVICE_ATTR_RO(usb_power_delivery_revision);
 219
 220/* ------------------------------------------------------------------------- */
 221/* Alternate Modes */
 222
 223static int altmode_match(struct device *dev, void *data)
 224{
 225        struct typec_altmode *adev = to_typec_altmode(dev);
 226        struct typec_device_id *id = data;
 227
 228        if (!is_typec_altmode(dev))
 229                return 0;
 230
 231        return ((adev->svid == id->svid) && (adev->mode == id->mode));
 232}
 233
 234static void typec_altmode_set_partner(struct altmode *altmode)
 235{
 236        struct typec_altmode *adev = &altmode->adev;
 237        struct typec_device_id id = { adev->svid, adev->mode, };
 238        struct typec_port *port = typec_altmode2port(adev);
 239        struct altmode *partner;
 240        struct device *dev;
 241
 242        dev = device_find_child(&port->dev, &id, altmode_match);
 243        if (!dev)
 244                return;
 245
 246        /* Bind the port alt mode to the partner/plug alt mode. */
 247        partner = to_altmode(to_typec_altmode(dev));
 248        altmode->partner = partner;
 249
 250        /* Bind the partner/plug alt mode to the port alt mode. */
 251        if (is_typec_plug(adev->dev.parent)) {
 252                struct typec_plug *plug = to_typec_plug(adev->dev.parent);
 253
 254                partner->plug[plug->index] = altmode;
 255        } else {
 256                partner->partner = altmode;
 257        }
 258}
 259
 260static void typec_altmode_put_partner(struct altmode *altmode)
 261{
 262        struct altmode *partner = altmode->partner;
 263        struct typec_altmode *adev;
 264
 265        if (!partner)
 266                return;
 267
 268        adev = &partner->adev;
 269
 270        if (is_typec_plug(adev->dev.parent)) {
 271                struct typec_plug *plug = to_typec_plug(adev->dev.parent);
 272
 273                partner->plug[plug->index] = NULL;
 274        } else {
 275                partner->partner = NULL;
 276        }
 277        put_device(&adev->dev);
 278}
 279
 280/**
 281 * typec_altmode_update_active - Report Enter/Exit mode
 282 * @adev: Handle to the alternate mode
 283 * @active: True when the mode has been entered
 284 *
 285 * If a partner or cable plug executes Enter/Exit Mode command successfully, the
 286 * drivers use this routine to report the updated state of the mode.
 287 */
 288void typec_altmode_update_active(struct typec_altmode *adev, bool active)
 289{
 290        char dir[6];
 291
 292        if (adev->active == active)
 293                return;
 294
 295        if (!is_typec_port(adev->dev.parent) && adev->dev.driver) {
 296                if (!active)
 297                        module_put(adev->dev.driver->owner);
 298                else
 299                        WARN_ON(!try_module_get(adev->dev.driver->owner));
 300        }
 301
 302        adev->active = active;
 303        snprintf(dir, sizeof(dir), "mode%d", adev->mode);
 304        sysfs_notify(&adev->dev.kobj, dir, "active");
 305        sysfs_notify(&adev->dev.kobj, NULL, "active");
 306        kobject_uevent(&adev->dev.kobj, KOBJ_CHANGE);
 307}
 308EXPORT_SYMBOL_GPL(typec_altmode_update_active);
 309
 310/**
 311 * typec_altmode2port - Alternate Mode to USB Type-C port
 312 * @alt: The Alternate Mode
 313 *
 314 * Returns handle to the port that a cable plug or partner with @alt is
 315 * connected to.
 316 */
 317struct typec_port *typec_altmode2port(struct typec_altmode *alt)
 318{
 319        if (is_typec_plug(alt->dev.parent))
 320                return to_typec_port(alt->dev.parent->parent->parent);
 321        if (is_typec_partner(alt->dev.parent))
 322                return to_typec_port(alt->dev.parent->parent);
 323        if (is_typec_port(alt->dev.parent))
 324                return to_typec_port(alt->dev.parent);
 325
 326        return NULL;
 327}
 328EXPORT_SYMBOL_GPL(typec_altmode2port);
 329
 330static ssize_t
 331vdo_show(struct device *dev, struct device_attribute *attr, char *buf)
 332{
 333        struct typec_altmode *alt = to_typec_altmode(dev);
 334
 335        return sprintf(buf, "0x%08x\n", alt->vdo);
 336}
 337static DEVICE_ATTR_RO(vdo);
 338
 339static ssize_t
 340description_show(struct device *dev, struct device_attribute *attr, char *buf)
 341{
 342        struct typec_altmode *alt = to_typec_altmode(dev);
 343
 344        return sprintf(buf, "%s\n", alt->desc ? alt->desc : "");
 345}
 346static DEVICE_ATTR_RO(description);
 347
 348static ssize_t
 349active_show(struct device *dev, struct device_attribute *attr, char *buf)
 350{
 351        struct typec_altmode *alt = to_typec_altmode(dev);
 352
 353        return sprintf(buf, "%s\n", alt->active ? "yes" : "no");
 354}
 355
 356static ssize_t active_store(struct device *dev, struct device_attribute *attr,
 357                            const char *buf, size_t size)
 358{
 359        struct typec_altmode *adev = to_typec_altmode(dev);
 360        struct altmode *altmode = to_altmode(adev);
 361        bool enter;
 362        int ret;
 363
 364        ret = kstrtobool(buf, &enter);
 365        if (ret)
 366                return ret;
 367
 368        if (adev->active == enter)
 369                return size;
 370
 371        if (is_typec_port(adev->dev.parent)) {
 372                typec_altmode_update_active(adev, enter);
 373
 374                /* Make sure that the partner exits the mode before disabling */
 375                if (altmode->partner && !enter && altmode->partner->adev.active)
 376                        typec_altmode_exit(&altmode->partner->adev);
 377        } else if (altmode->partner) {
 378                if (enter && !altmode->partner->adev.active) {
 379                        dev_warn(dev, "port has the mode disabled\n");
 380                        return -EPERM;
 381                }
 382        }
 383
 384        /* Note: If there is no driver, the mode will not be entered */
 385        if (adev->ops && adev->ops->activate) {
 386                ret = adev->ops->activate(adev, enter);
 387                if (ret)
 388                        return ret;
 389        }
 390
 391        return size;
 392}
 393static DEVICE_ATTR_RW(active);
 394
 395static ssize_t
 396supported_roles_show(struct device *dev, struct device_attribute *attr,
 397                     char *buf)
 398{
 399        struct altmode *alt = to_altmode(to_typec_altmode(dev));
 400        ssize_t ret;
 401
 402        switch (alt->roles) {
 403        case TYPEC_PORT_SRC:
 404                ret = sprintf(buf, "source\n");
 405                break;
 406        case TYPEC_PORT_SNK:
 407                ret = sprintf(buf, "sink\n");
 408                break;
 409        case TYPEC_PORT_DRP:
 410        default:
 411                ret = sprintf(buf, "source sink\n");
 412                break;
 413        }
 414        return ret;
 415}
 416static DEVICE_ATTR_RO(supported_roles);
 417
 418static ssize_t
 419mode_show(struct device *dev, struct device_attribute *attr, char *buf)
 420{
 421        struct typec_altmode *adev = to_typec_altmode(dev);
 422
 423        return sprintf(buf, "%u\n", adev->mode);
 424}
 425static DEVICE_ATTR_RO(mode);
 426
 427static ssize_t
 428svid_show(struct device *dev, struct device_attribute *attr, char *buf)
 429{
 430        struct typec_altmode *adev = to_typec_altmode(dev);
 431
 432        return sprintf(buf, "%04x\n", adev->svid);
 433}
 434static DEVICE_ATTR_RO(svid);
 435
 436static struct attribute *typec_altmode_attrs[] = {
 437        &dev_attr_active.attr,
 438        &dev_attr_mode.attr,
 439        &dev_attr_svid.attr,
 440        &dev_attr_vdo.attr,
 441        NULL
 442};
 443
 444static umode_t typec_altmode_attr_is_visible(struct kobject *kobj,
 445                                             struct attribute *attr, int n)
 446{
 447        struct typec_altmode *adev = to_typec_altmode(kobj_to_dev(kobj));
 448
 449        if (attr == &dev_attr_active.attr)
 450                if (!adev->ops || !adev->ops->activate)
 451                        return 0444;
 452
 453        return attr->mode;
 454}
 455
 456static const struct attribute_group typec_altmode_group = {
 457        .is_visible = typec_altmode_attr_is_visible,
 458        .attrs = typec_altmode_attrs,
 459};
 460
 461static const struct attribute_group *typec_altmode_groups[] = {
 462        &typec_altmode_group,
 463        NULL
 464};
 465
 466static int altmode_id_get(struct device *dev)
 467{
 468        struct ida *ids;
 469
 470        if (is_typec_partner(dev))
 471                ids = &to_typec_partner(dev)->mode_ids;
 472        else if (is_typec_plug(dev))
 473                ids = &to_typec_plug(dev)->mode_ids;
 474        else
 475                ids = &to_typec_port(dev)->mode_ids;
 476
 477        return ida_simple_get(ids, 0, 0, GFP_KERNEL);
 478}
 479
 480static void altmode_id_remove(struct device *dev, int id)
 481{
 482        struct ida *ids;
 483
 484        if (is_typec_partner(dev))
 485                ids = &to_typec_partner(dev)->mode_ids;
 486        else if (is_typec_plug(dev))
 487                ids = &to_typec_plug(dev)->mode_ids;
 488        else
 489                ids = &to_typec_port(dev)->mode_ids;
 490
 491        ida_simple_remove(ids, id);
 492}
 493
 494static void typec_altmode_release(struct device *dev)
 495{
 496        struct altmode *alt = to_altmode(to_typec_altmode(dev));
 497
 498        typec_altmode_put_partner(alt);
 499
 500        altmode_id_remove(alt->adev.dev.parent, alt->id);
 501        kfree(alt);
 502}
 503
 504const struct device_type typec_altmode_dev_type = {
 505        .name = "typec_alternate_mode",
 506        .groups = typec_altmode_groups,
 507        .release = typec_altmode_release,
 508};
 509
 510static struct typec_altmode *
 511typec_register_altmode(struct device *parent,
 512                       const struct typec_altmode_desc *desc)
 513{
 514        unsigned int id = altmode_id_get(parent);
 515        bool is_port = is_typec_port(parent);
 516        struct altmode *alt;
 517        int ret;
 518
 519        alt = kzalloc(sizeof(*alt), GFP_KERNEL);
 520        if (!alt) {
 521                altmode_id_remove(parent, id);
 522                return ERR_PTR(-ENOMEM);
 523        }
 524
 525        alt->adev.svid = desc->svid;
 526        alt->adev.mode = desc->mode;
 527        alt->adev.vdo = desc->vdo;
 528        alt->roles = desc->roles;
 529        alt->id = id;
 530
 531        alt->attrs[0] = &dev_attr_vdo.attr;
 532        alt->attrs[1] = &dev_attr_description.attr;
 533        alt->attrs[2] = &dev_attr_active.attr;
 534
 535        if (is_port) {
 536                alt->attrs[3] = &dev_attr_supported_roles.attr;
 537                alt->adev.active = true; /* Enabled by default */
 538        }
 539
 540        sprintf(alt->group_name, "mode%d", desc->mode);
 541        alt->group.name = alt->group_name;
 542        alt->group.attrs = alt->attrs;
 543        alt->groups[0] = &alt->group;
 544
 545        alt->adev.dev.parent = parent;
 546        alt->adev.dev.groups = alt->groups;
 547        alt->adev.dev.type = &typec_altmode_dev_type;
 548        dev_set_name(&alt->adev.dev, "%s.%u", dev_name(parent), id);
 549
 550        /* Link partners and plugs with the ports */
 551        if (!is_port)
 552                typec_altmode_set_partner(alt);
 553
 554        /* The partners are bind to drivers */
 555        if (is_typec_partner(parent))
 556                alt->adev.dev.bus = &typec_bus;
 557
 558        /* Plug alt modes need a class to generate udev events. */
 559        if (is_typec_plug(parent))
 560                alt->adev.dev.class = &typec_class;
 561
 562        ret = device_register(&alt->adev.dev);
 563        if (ret) {
 564                dev_err(parent, "failed to register alternate mode (%d)\n",
 565                        ret);
 566                put_device(&alt->adev.dev);
 567                return ERR_PTR(ret);
 568        }
 569
 570        return &alt->adev;
 571}
 572
 573/**
 574 * typec_unregister_altmode - Unregister Alternate Mode
 575 * @adev: The alternate mode to be unregistered
 576 *
 577 * Unregister device created with typec_partner_register_altmode(),
 578 * typec_plug_register_altmode() or typec_port_register_altmode().
 579 */
 580void typec_unregister_altmode(struct typec_altmode *adev)
 581{
 582        if (IS_ERR_OR_NULL(adev))
 583                return;
 584        typec_mux_put(to_altmode(adev)->mux);
 585        device_unregister(&adev->dev);
 586}
 587EXPORT_SYMBOL_GPL(typec_unregister_altmode);
 588
 589/* ------------------------------------------------------------------------- */
 590/* Type-C Partners */
 591
 592static ssize_t accessory_mode_show(struct device *dev,
 593                                   struct device_attribute *attr,
 594                                   char *buf)
 595{
 596        struct typec_partner *p = to_typec_partner(dev);
 597
 598        return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]);
 599}
 600static DEVICE_ATTR_RO(accessory_mode);
 601
 602static ssize_t supports_usb_power_delivery_show(struct device *dev,
 603                                                struct device_attribute *attr,
 604                                                char *buf)
 605{
 606        struct typec_partner *p = to_typec_partner(dev);
 607
 608        return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no");
 609}
 610static DEVICE_ATTR_RO(supports_usb_power_delivery);
 611
 612static ssize_t number_of_alternate_modes_show(struct device *dev, struct device_attribute *attr,
 613                                              char *buf)
 614{
 615        struct typec_partner *partner;
 616        struct typec_plug *plug;
 617        int num_altmodes;
 618
 619        if (is_typec_partner(dev)) {
 620                partner = to_typec_partner(dev);
 621                num_altmodes = partner->num_altmodes;
 622        } else if (is_typec_plug(dev)) {
 623                plug = to_typec_plug(dev);
 624                num_altmodes = plug->num_altmodes;
 625        } else {
 626                return 0;
 627        }
 628
 629        return sysfs_emit(buf, "%d\n", num_altmodes);
 630}
 631static DEVICE_ATTR_RO(number_of_alternate_modes);
 632
 633static struct attribute *typec_partner_attrs[] = {
 634        &dev_attr_accessory_mode.attr,
 635        &dev_attr_supports_usb_power_delivery.attr,
 636        &dev_attr_number_of_alternate_modes.attr,
 637        &dev_attr_type.attr,
 638        &dev_attr_usb_power_delivery_revision.attr,
 639        NULL
 640};
 641
 642static umode_t typec_partner_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
 643{
 644        struct typec_partner *partner = to_typec_partner(kobj_to_dev(kobj));
 645
 646        if (attr == &dev_attr_number_of_alternate_modes.attr) {
 647                if (partner->num_altmodes < 0)
 648                        return 0;
 649        }
 650
 651        if (attr == &dev_attr_type.attr)
 652                if (!get_pd_product_type(kobj_to_dev(kobj)))
 653                        return 0;
 654
 655        return attr->mode;
 656}
 657
 658static const struct attribute_group typec_partner_group = {
 659        .is_visible = typec_partner_attr_is_visible,
 660        .attrs = typec_partner_attrs
 661};
 662
 663static const struct attribute_group *typec_partner_groups[] = {
 664        &typec_partner_group,
 665        NULL
 666};
 667
 668static void typec_partner_release(struct device *dev)
 669{
 670        struct typec_partner *partner = to_typec_partner(dev);
 671
 672        ida_destroy(&partner->mode_ids);
 673        kfree(partner);
 674}
 675
 676const struct device_type typec_partner_dev_type = {
 677        .name = "typec_partner",
 678        .groups = typec_partner_groups,
 679        .release = typec_partner_release,
 680};
 681
 682/**
 683 * typec_partner_set_identity - Report result from Discover Identity command
 684 * @partner: The partner updated identity values
 685 *
 686 * This routine is used to report that the result of Discover Identity USB power
 687 * delivery command has become available.
 688 */
 689int typec_partner_set_identity(struct typec_partner *partner)
 690{
 691        if (!partner->identity)
 692                return -EINVAL;
 693
 694        typec_report_identity(&partner->dev);
 695        return 0;
 696}
 697EXPORT_SYMBOL_GPL(typec_partner_set_identity);
 698
 699/**
 700 * typec_partner_set_pd_revision - Set the PD revision supported by the partner
 701 * @partner: The partner to be updated.
 702 * @pd_revision:  USB Power Delivery Specification Revision supported by partner
 703 *
 704 * This routine is used to report that the PD revision of the port partner has
 705 * become available.
 706 */
 707void typec_partner_set_pd_revision(struct typec_partner *partner, u16 pd_revision)
 708{
 709        if (partner->pd_revision == pd_revision)
 710                return;
 711
 712        partner->pd_revision = pd_revision;
 713        sysfs_notify(&partner->dev.kobj, NULL, "usb_power_delivery_revision");
 714        if (pd_revision != 0 && !partner->usb_pd) {
 715                partner->usb_pd = 1;
 716                sysfs_notify(&partner->dev.kobj, NULL,
 717                             "supports_usb_power_delivery");
 718        }
 719        kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE);
 720}
 721EXPORT_SYMBOL_GPL(typec_partner_set_pd_revision);
 722
 723/**
 724 * typec_partner_set_num_altmodes - Set the number of available partner altmodes
 725 * @partner: The partner to be updated.
 726 * @num_altmodes: The number of altmodes we want to specify as available.
 727 *
 728 * This routine is used to report the number of alternate modes supported by the
 729 * partner. This value is *not* enforced in alternate mode registration routines.
 730 *
 731 * @partner.num_altmodes is set to -1 on partner registration, denoting that
 732 * a valid value has not been set for it yet.
 733 *
 734 * Returns 0 on success or negative error number on failure.
 735 */
 736int typec_partner_set_num_altmodes(struct typec_partner *partner, int num_altmodes)
 737{
 738        int ret;
 739
 740        if (num_altmodes < 0)
 741                return -EINVAL;
 742
 743        partner->num_altmodes = num_altmodes;
 744        ret = sysfs_update_group(&partner->dev.kobj, &typec_partner_group);
 745        if (ret < 0)
 746                return ret;
 747
 748        sysfs_notify(&partner->dev.kobj, NULL, "number_of_alternate_modes");
 749        kobject_uevent(&partner->dev.kobj, KOBJ_CHANGE);
 750
 751        return 0;
 752}
 753EXPORT_SYMBOL_GPL(typec_partner_set_num_altmodes);
 754
 755/**
 756 * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode
 757 * @partner: USB Type-C Partner that supports the alternate mode
 758 * @desc: Description of the alternate mode
 759 *
 760 * This routine is used to register each alternate mode individually that
 761 * @partner has listed in response to Discover SVIDs command. The modes for a
 762 * SVID listed in response to Discover Modes command need to be listed in an
 763 * array in @desc.
 764 *
 765 * Returns handle to the alternate mode on success or ERR_PTR on failure.
 766 */
 767struct typec_altmode *
 768typec_partner_register_altmode(struct typec_partner *partner,
 769                               const struct typec_altmode_desc *desc)
 770{
 771        return typec_register_altmode(&partner->dev, desc);
 772}
 773EXPORT_SYMBOL_GPL(typec_partner_register_altmode);
 774
 775/**
 776 * typec_partner_set_svdm_version - Set negotiated Structured VDM (SVDM) Version
 777 * @partner: USB Type-C Partner that supports SVDM
 778 * @svdm_version: Negotiated SVDM Version
 779 *
 780 * This routine is used to save the negotiated SVDM Version.
 781 */
 782void typec_partner_set_svdm_version(struct typec_partner *partner,
 783                                   enum usb_pd_svdm_ver svdm_version)
 784{
 785        partner->svdm_version = svdm_version;
 786}
 787EXPORT_SYMBOL_GPL(typec_partner_set_svdm_version);
 788
 789/**
 790 * typec_register_partner - Register a USB Type-C Partner
 791 * @port: The USB Type-C Port the partner is connected to
 792 * @desc: Description of the partner
 793 *
 794 * Registers a device for USB Type-C Partner described in @desc.
 795 *
 796 * Returns handle to the partner on success or ERR_PTR on failure.
 797 */
 798struct typec_partner *typec_register_partner(struct typec_port *port,
 799                                             struct typec_partner_desc *desc)
 800{
 801        struct typec_partner *partner;
 802        int ret;
 803
 804        partner = kzalloc(sizeof(*partner), GFP_KERNEL);
 805        if (!partner)
 806                return ERR_PTR(-ENOMEM);
 807
 808        ida_init(&partner->mode_ids);
 809        partner->usb_pd = desc->usb_pd;
 810        partner->accessory = desc->accessory;
 811        partner->num_altmodes = -1;
 812        partner->pd_revision = desc->pd_revision;
 813        partner->svdm_version = port->cap->svdm_version;
 814
 815        if (desc->identity) {
 816                /*
 817                 * Creating directory for the identity only if the driver is
 818                 * able to provide data to it.
 819                 */
 820                partner->dev.groups = usb_pd_id_groups;
 821                partner->identity = desc->identity;
 822        }
 823
 824        partner->dev.class = &typec_class;
 825        partner->dev.parent = &port->dev;
 826        partner->dev.type = &typec_partner_dev_type;
 827        dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev));
 828
 829        ret = device_register(&partner->dev);
 830        if (ret) {
 831                dev_err(&port->dev, "failed to register partner (%d)\n", ret);
 832                put_device(&partner->dev);
 833                return ERR_PTR(ret);
 834        }
 835
 836        return partner;
 837}
 838EXPORT_SYMBOL_GPL(typec_register_partner);
 839
 840/**
 841 * typec_unregister_partner - Unregister a USB Type-C Partner
 842 * @partner: The partner to be unregistered
 843 *
 844 * Unregister device created with typec_register_partner().
 845 */
 846void typec_unregister_partner(struct typec_partner *partner)
 847{
 848        if (!IS_ERR_OR_NULL(partner))
 849                device_unregister(&partner->dev);
 850}
 851EXPORT_SYMBOL_GPL(typec_unregister_partner);
 852
 853/* ------------------------------------------------------------------------- */
 854/* Type-C Cable Plugs */
 855
 856static void typec_plug_release(struct device *dev)
 857{
 858        struct typec_plug *plug = to_typec_plug(dev);
 859
 860        ida_destroy(&plug->mode_ids);
 861        kfree(plug);
 862}
 863
 864static struct attribute *typec_plug_attrs[] = {
 865        &dev_attr_number_of_alternate_modes.attr,
 866        NULL
 867};
 868
 869static umode_t typec_plug_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n)
 870{
 871        struct typec_plug *plug = to_typec_plug(kobj_to_dev(kobj));
 872
 873        if (attr == &dev_attr_number_of_alternate_modes.attr) {
 874                if (plug->num_altmodes < 0)
 875                        return 0;
 876        }
 877
 878        return attr->mode;
 879}
 880
 881static const struct attribute_group typec_plug_group = {
 882        .is_visible = typec_plug_attr_is_visible,
 883        .attrs = typec_plug_attrs
 884};
 885
 886static const struct attribute_group *typec_plug_groups[] = {
 887        &typec_plug_group,
 888        NULL
 889};
 890
 891const struct device_type typec_plug_dev_type = {
 892        .name = "typec_plug",
 893        .groups = typec_plug_groups,
 894        .release = typec_plug_release,
 895};
 896
 897/**
 898 * typec_plug_set_num_altmodes - Set the number of available plug altmodes
 899 * @plug: The plug to be updated.
 900 * @num_altmodes: The number of altmodes we want to specify as available.
 901 *
 902 * This routine is used to report the number of alternate modes supported by the
 903 * plug. This value is *not* enforced in alternate mode registration routines.
 904 *
 905 * @plug.num_altmodes is set to -1 on plug registration, denoting that
 906 * a valid value has not been set for it yet.
 907 *
 908 * Returns 0 on success or negative error number on failure.
 909 */
 910int typec_plug_set_num_altmodes(struct typec_plug *plug, int num_altmodes)
 911{
 912        int ret;
 913
 914        if (num_altmodes < 0)
 915                return -EINVAL;
 916
 917        plug->num_altmodes = num_altmodes;
 918        ret = sysfs_update_group(&plug->dev.kobj, &typec_plug_group);
 919        if (ret < 0)
 920                return ret;
 921
 922        sysfs_notify(&plug->dev.kobj, NULL, "number_of_alternate_modes");
 923        kobject_uevent(&plug->dev.kobj, KOBJ_CHANGE);
 924
 925        return 0;
 926}
 927EXPORT_SYMBOL_GPL(typec_plug_set_num_altmodes);
 928
 929/**
 930 * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode
 931 * @plug: USB Type-C Cable Plug that supports the alternate mode
 932 * @desc: Description of the alternate mode
 933 *
 934 * This routine is used to register each alternate mode individually that @plug
 935 * has listed in response to Discover SVIDs command. The modes for a SVID that
 936 * the plug lists in response to Discover Modes command need to be listed in an
 937 * array in @desc.
 938 *
 939 * Returns handle to the alternate mode on success or ERR_PTR on failure.
 940 */
 941struct typec_altmode *
 942typec_plug_register_altmode(struct typec_plug *plug,
 943                            const struct typec_altmode_desc *desc)
 944{
 945        return typec_register_altmode(&plug->dev, desc);
 946}
 947EXPORT_SYMBOL_GPL(typec_plug_register_altmode);
 948
 949/**
 950 * typec_register_plug - Register a USB Type-C Cable Plug
 951 * @cable: USB Type-C Cable with the plug
 952 * @desc: Description of the cable plug
 953 *
 954 * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C
 955 * Cable Plug represents a plug with electronics in it that can response to USB
 956 * Power Delivery SOP Prime or SOP Double Prime packages.
 957 *
 958 * Returns handle to the cable plug on success or ERR_PTR on failure.
 959 */
 960struct typec_plug *typec_register_plug(struct typec_cable *cable,
 961                                       struct typec_plug_desc *desc)
 962{
 963        struct typec_plug *plug;
 964        char name[8];
 965        int ret;
 966
 967        plug = kzalloc(sizeof(*plug), GFP_KERNEL);
 968        if (!plug)
 969                return ERR_PTR(-ENOMEM);
 970
 971        sprintf(name, "plug%d", desc->index);
 972
 973        ida_init(&plug->mode_ids);
 974        plug->num_altmodes = -1;
 975        plug->index = desc->index;
 976        plug->dev.class = &typec_class;
 977        plug->dev.parent = &cable->dev;
 978        plug->dev.type = &typec_plug_dev_type;
 979        dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name);
 980
 981        ret = device_register(&plug->dev);
 982        if (ret) {
 983                dev_err(&cable->dev, "failed to register plug (%d)\n", ret);
 984                put_device(&plug->dev);
 985                return ERR_PTR(ret);
 986        }
 987
 988        return plug;
 989}
 990EXPORT_SYMBOL_GPL(typec_register_plug);
 991
 992/**
 993 * typec_unregister_plug - Unregister a USB Type-C Cable Plug
 994 * @plug: The cable plug to be unregistered
 995 *
 996 * Unregister device created with typec_register_plug().
 997 */
 998void typec_unregister_plug(struct typec_plug *plug)
 999{
1000        if (!IS_ERR_OR_NULL(plug))
1001                device_unregister(&plug->dev);
1002}
1003EXPORT_SYMBOL_GPL(typec_unregister_plug);
1004
1005/* Type-C Cables */
1006
1007static const char * const typec_plug_types[] = {
1008        [USB_PLUG_NONE]         = "unknown",
1009        [USB_PLUG_TYPE_A]       = "type-a",
1010        [USB_PLUG_TYPE_B]       = "type-b",
1011        [USB_PLUG_TYPE_C]       = "type-c",
1012        [USB_PLUG_CAPTIVE]      = "captive",
1013};
1014
1015static ssize_t plug_type_show(struct device *dev,
1016                              struct device_attribute *attr, char *buf)
1017{
1018        struct typec_cable *cable = to_typec_cable(dev);
1019
1020        return sprintf(buf, "%s\n", typec_plug_types[cable->type]);
1021}
1022static DEVICE_ATTR_RO(plug_type);
1023
1024static struct attribute *typec_cable_attrs[] = {
1025        &dev_attr_type.attr,
1026        &dev_attr_plug_type.attr,
1027        &dev_attr_usb_power_delivery_revision.attr,
1028        NULL
1029};
1030ATTRIBUTE_GROUPS(typec_cable);
1031
1032static void typec_cable_release(struct device *dev)
1033{
1034        struct typec_cable *cable = to_typec_cable(dev);
1035
1036        kfree(cable);
1037}
1038
1039const struct device_type typec_cable_dev_type = {
1040        .name = "typec_cable",
1041        .groups = typec_cable_groups,
1042        .release = typec_cable_release,
1043};
1044
1045static int cable_match(struct device *dev, void *data)
1046{
1047        return is_typec_cable(dev);
1048}
1049
1050/**
1051 * typec_cable_get - Get a reference to the USB Type-C cable
1052 * @port: The USB Type-C Port the cable is connected to
1053 *
1054 * The caller must decrement the reference count with typec_cable_put() after
1055 * use.
1056 */
1057struct typec_cable *typec_cable_get(struct typec_port *port)
1058{
1059        struct device *dev;
1060
1061        dev = device_find_child(&port->dev, NULL, cable_match);
1062        if (!dev)
1063                return NULL;
1064
1065        return to_typec_cable(dev);
1066}
1067EXPORT_SYMBOL_GPL(typec_cable_get);
1068
1069/**
1070 * typec_cable_put - Decrement the reference count on USB Type-C cable
1071 * @cable: The USB Type-C cable
1072 */
1073void typec_cable_put(struct typec_cable *cable)
1074{
1075        put_device(&cable->dev);
1076}
1077EXPORT_SYMBOL_GPL(typec_cable_put);
1078
1079/**
1080 * typec_cable_is_active - Check is the USB Type-C cable active or passive
1081 * @cable: The USB Type-C Cable
1082 *
1083 * Return 1 if the cable is active or 0 if it's passive.
1084 */
1085int typec_cable_is_active(struct typec_cable *cable)
1086{
1087        return cable->active;
1088}
1089EXPORT_SYMBOL_GPL(typec_cable_is_active);
1090
1091/**
1092 * typec_cable_set_identity - Report result from Discover Identity command
1093 * @cable: The cable updated identity values
1094 *
1095 * This routine is used to report that the result of Discover Identity USB power
1096 * delivery command has become available.
1097 */
1098int typec_cable_set_identity(struct typec_cable *cable)
1099{
1100        if (!cable->identity)
1101                return -EINVAL;
1102
1103        typec_report_identity(&cable->dev);
1104        return 0;
1105}
1106EXPORT_SYMBOL_GPL(typec_cable_set_identity);
1107
1108/**
1109 * typec_register_cable - Register a USB Type-C Cable
1110 * @port: The USB Type-C Port the cable is connected to
1111 * @desc: Description of the cable
1112 *
1113 * Registers a device for USB Type-C Cable described in @desc. The cable will be
1114 * parent for the optional cable plug devises.
1115 *
1116 * Returns handle to the cable on success or ERR_PTR on failure.
1117 */
1118struct typec_cable *typec_register_cable(struct typec_port *port,
1119                                         struct typec_cable_desc *desc)
1120{
1121        struct typec_cable *cable;
1122        int ret;
1123
1124        cable = kzalloc(sizeof(*cable), GFP_KERNEL);
1125        if (!cable)
1126                return ERR_PTR(-ENOMEM);
1127
1128        cable->type = desc->type;
1129        cable->active = desc->active;
1130        cable->pd_revision = desc->pd_revision;
1131
1132        if (desc->identity) {
1133                /*
1134                 * Creating directory for the identity only if the driver is
1135                 * able to provide data to it.
1136                 */
1137                cable->dev.groups = usb_pd_id_groups;
1138                cable->identity = desc->identity;
1139        }
1140
1141        cable->dev.class = &typec_class;
1142        cable->dev.parent = &port->dev;
1143        cable->dev.type = &typec_cable_dev_type;
1144        dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev));
1145
1146        ret = device_register(&cable->dev);
1147        if (ret) {
1148                dev_err(&port->dev, "failed to register cable (%d)\n", ret);
1149                put_device(&cable->dev);
1150                return ERR_PTR(ret);
1151        }
1152
1153        return cable;
1154}
1155EXPORT_SYMBOL_GPL(typec_register_cable);
1156
1157/**
1158 * typec_unregister_cable - Unregister a USB Type-C Cable
1159 * @cable: The cable to be unregistered
1160 *
1161 * Unregister device created with typec_register_cable().
1162 */
1163void typec_unregister_cable(struct typec_cable *cable)
1164{
1165        if (!IS_ERR_OR_NULL(cable))
1166                device_unregister(&cable->dev);
1167}
1168EXPORT_SYMBOL_GPL(typec_unregister_cable);
1169
1170/* ------------------------------------------------------------------------- */
1171/* USB Type-C ports */
1172
1173static const char * const typec_orientations[] = {
1174        [TYPEC_ORIENTATION_NONE]        = "unknown",
1175        [TYPEC_ORIENTATION_NORMAL]      = "normal",
1176        [TYPEC_ORIENTATION_REVERSE]     = "reverse",
1177};
1178
1179static const char * const typec_roles[] = {
1180        [TYPEC_SINK]    = "sink",
1181        [TYPEC_SOURCE]  = "source",
1182};
1183
1184static const char * const typec_data_roles[] = {
1185        [TYPEC_DEVICE]  = "device",
1186        [TYPEC_HOST]    = "host",
1187};
1188
1189static const char * const typec_port_power_roles[] = {
1190        [TYPEC_PORT_SRC] = "source",
1191        [TYPEC_PORT_SNK] = "sink",
1192        [TYPEC_PORT_DRP] = "dual",
1193};
1194
1195static const char * const typec_port_data_roles[] = {
1196        [TYPEC_PORT_DFP] = "host",
1197        [TYPEC_PORT_UFP] = "device",
1198        [TYPEC_PORT_DRD] = "dual",
1199};
1200
1201static const char * const typec_port_types_drp[] = {
1202        [TYPEC_PORT_SRC] = "dual [source] sink",
1203        [TYPEC_PORT_SNK] = "dual source [sink]",
1204        [TYPEC_PORT_DRP] = "[dual] source sink",
1205};
1206
1207static ssize_t
1208preferred_role_store(struct device *dev, struct device_attribute *attr,
1209                     const char *buf, size_t size)
1210{
1211        struct typec_port *port = to_typec_port(dev);
1212        int role;
1213        int ret;
1214
1215        if (port->cap->type != TYPEC_PORT_DRP) {
1216                dev_dbg(dev, "Preferred role only supported with DRP ports\n");
1217                return -EOPNOTSUPP;
1218        }
1219
1220        if (!port->ops || !port->ops->try_role) {
1221                dev_dbg(dev, "Setting preferred role not supported\n");
1222                return -EOPNOTSUPP;
1223        }
1224
1225        role = sysfs_match_string(typec_roles, buf);
1226        if (role < 0) {
1227                if (sysfs_streq(buf, "none"))
1228                        role = TYPEC_NO_PREFERRED_ROLE;
1229                else
1230                        return -EINVAL;
1231        }
1232
1233        ret = port->ops->try_role(port, role);
1234        if (ret)
1235                return ret;
1236
1237        port->prefer_role = role;
1238        return size;
1239}
1240
1241static ssize_t
1242preferred_role_show(struct device *dev, struct device_attribute *attr,
1243                    char *buf)
1244{
1245        struct typec_port *port = to_typec_port(dev);
1246
1247        if (port->cap->type != TYPEC_PORT_DRP)
1248                return 0;
1249
1250        if (port->prefer_role < 0)
1251                return 0;
1252
1253        return sprintf(buf, "%s\n", typec_roles[port->prefer_role]);
1254}
1255static DEVICE_ATTR_RW(preferred_role);
1256
1257static ssize_t data_role_store(struct device *dev,
1258                               struct device_attribute *attr,
1259                               const char *buf, size_t size)
1260{
1261        struct typec_port *port = to_typec_port(dev);
1262        int ret;
1263
1264        if (!port->ops || !port->ops->dr_set) {
1265                dev_dbg(dev, "data role swapping not supported\n");
1266                return -EOPNOTSUPP;
1267        }
1268
1269        ret = sysfs_match_string(typec_data_roles, buf);
1270        if (ret < 0)
1271                return ret;
1272
1273        mutex_lock(&port->port_type_lock);
1274        if (port->cap->data != TYPEC_PORT_DRD) {
1275                ret = -EOPNOTSUPP;
1276                goto unlock_and_ret;
1277        }
1278
1279        ret = port->ops->dr_set(port, ret);
1280        if (ret)
1281                goto unlock_and_ret;
1282
1283        ret = size;
1284unlock_and_ret:
1285        mutex_unlock(&port->port_type_lock);
1286        return ret;
1287}
1288
1289static ssize_t data_role_show(struct device *dev,
1290                              struct device_attribute *attr, char *buf)
1291{
1292        struct typec_port *port = to_typec_port(dev);
1293
1294        if (port->cap->data == TYPEC_PORT_DRD)
1295                return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ?
1296                               "[host] device" : "host [device]");
1297
1298        return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]);
1299}
1300static DEVICE_ATTR_RW(data_role);
1301
1302static ssize_t power_role_store(struct device *dev,
1303                                struct device_attribute *attr,
1304                                const char *buf, size_t size)
1305{
1306        struct typec_port *port = to_typec_port(dev);
1307        int ret;
1308
1309        if (!port->ops || !port->ops->pr_set) {
1310                dev_dbg(dev, "power role swapping not supported\n");
1311                return -EOPNOTSUPP;
1312        }
1313
1314        if (port->pwr_opmode != TYPEC_PWR_MODE_PD) {
1315                dev_dbg(dev, "partner unable to swap power role\n");
1316                return -EIO;
1317        }
1318
1319        ret = sysfs_match_string(typec_roles, buf);
1320        if (ret < 0)
1321                return ret;
1322
1323        mutex_lock(&port->port_type_lock);
1324        if (port->port_type != TYPEC_PORT_DRP) {
1325                dev_dbg(dev, "port type fixed at \"%s\"",
1326                             typec_port_power_roles[port->port_type]);
1327                ret = -EOPNOTSUPP;
1328                goto unlock_and_ret;
1329        }
1330
1331        ret = port->ops->pr_set(port, ret);
1332        if (ret)
1333                goto unlock_and_ret;
1334
1335        ret = size;
1336unlock_and_ret:
1337        mutex_unlock(&port->port_type_lock);
1338        return ret;
1339}
1340
1341static ssize_t power_role_show(struct device *dev,
1342                               struct device_attribute *attr, char *buf)
1343{
1344        struct typec_port *port = to_typec_port(dev);
1345
1346        if (port->cap->type == TYPEC_PORT_DRP)
1347                return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ?
1348                               "[source] sink" : "source [sink]");
1349
1350        return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]);
1351}
1352static DEVICE_ATTR_RW(power_role);
1353
1354static ssize_t
1355port_type_store(struct device *dev, struct device_attribute *attr,
1356                        const char *buf, size_t size)
1357{
1358        struct typec_port *port = to_typec_port(dev);
1359        int ret;
1360        enum typec_port_type type;
1361
1362        if (port->cap->type != TYPEC_PORT_DRP ||
1363            !port->ops || !port->ops->port_type_set) {
1364                dev_dbg(dev, "changing port type not supported\n");
1365                return -EOPNOTSUPP;
1366        }
1367
1368        ret = sysfs_match_string(typec_port_power_roles, buf);
1369        if (ret < 0)
1370                return ret;
1371
1372        type = ret;
1373        mutex_lock(&port->port_type_lock);
1374
1375        if (port->port_type == type) {
1376                ret = size;
1377                goto unlock_and_ret;
1378        }
1379
1380        ret = port->ops->port_type_set(port, type);
1381        if (ret)
1382                goto unlock_and_ret;
1383
1384        port->port_type = type;
1385        ret = size;
1386
1387unlock_and_ret:
1388        mutex_unlock(&port->port_type_lock);
1389        return ret;
1390}
1391
1392static ssize_t
1393port_type_show(struct device *dev, struct device_attribute *attr,
1394                char *buf)
1395{
1396        struct typec_port *port = to_typec_port(dev);
1397
1398        if (port->cap->type == TYPEC_PORT_DRP)
1399                return sprintf(buf, "%s\n",
1400                               typec_port_types_drp[port->port_type]);
1401
1402        return sprintf(buf, "[%s]\n", typec_port_power_roles[port->cap->type]);
1403}
1404static DEVICE_ATTR_RW(port_type);
1405
1406static const char * const typec_pwr_opmodes[] = {
1407        [TYPEC_PWR_MODE_USB]    = "default",
1408        [TYPEC_PWR_MODE_1_5A]   = "1.5A",
1409        [TYPEC_PWR_MODE_3_0A]   = "3.0A",
1410        [TYPEC_PWR_MODE_PD]     = "usb_power_delivery",
1411};
1412
1413static ssize_t power_operation_mode_show(struct device *dev,
1414                                         struct device_attribute *attr,
1415                                         char *buf)
1416{
1417        struct typec_port *port = to_typec_port(dev);
1418
1419        return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]);
1420}
1421static DEVICE_ATTR_RO(power_operation_mode);
1422
1423static ssize_t vconn_source_store(struct device *dev,
1424                                  struct device_attribute *attr,
1425                                  const char *buf, size_t size)
1426{
1427        struct typec_port *port = to_typec_port(dev);
1428        bool source;
1429        int ret;
1430
1431        if (!port->cap->pd_revision) {
1432                dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n");
1433                return -EOPNOTSUPP;
1434        }
1435
1436        if (!port->ops || !port->ops->vconn_set) {
1437                dev_dbg(dev, "VCONN swapping not supported\n");
1438                return -EOPNOTSUPP;
1439        }
1440
1441        ret = kstrtobool(buf, &source);
1442        if (ret)
1443                return ret;
1444
1445        ret = port->ops->vconn_set(port, (enum typec_role)source);
1446        if (ret)
1447                return ret;
1448
1449        return size;
1450}
1451
1452static ssize_t vconn_source_show(struct device *dev,
1453                                 struct device_attribute *attr, char *buf)
1454{
1455        struct typec_port *port = to_typec_port(dev);
1456
1457        return sprintf(buf, "%s\n",
1458                       port->vconn_role == TYPEC_SOURCE ? "yes" : "no");
1459}
1460static DEVICE_ATTR_RW(vconn_source);
1461
1462static ssize_t supported_accessory_modes_show(struct device *dev,
1463                                              struct device_attribute *attr,
1464                                              char *buf)
1465{
1466        struct typec_port *port = to_typec_port(dev);
1467        ssize_t ret = 0;
1468        int i;
1469
1470        for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) {
1471                if (port->cap->accessory[i])
1472                        ret += sprintf(buf + ret, "%s ",
1473                               typec_accessory_modes[port->cap->accessory[i]]);
1474        }
1475
1476        if (!ret)
1477                return sprintf(buf, "none\n");
1478
1479        buf[ret - 1] = '\n';
1480
1481        return ret;
1482}
1483static DEVICE_ATTR_RO(supported_accessory_modes);
1484
1485static ssize_t usb_typec_revision_show(struct device *dev,
1486                                       struct device_attribute *attr,
1487                                       char *buf)
1488{
1489        struct typec_port *port = to_typec_port(dev);
1490        u16 rev = port->cap->revision;
1491
1492        return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
1493}
1494static DEVICE_ATTR_RO(usb_typec_revision);
1495
1496static ssize_t usb_power_delivery_revision_show(struct device *dev,
1497                                                struct device_attribute *attr,
1498                                                char *buf)
1499{
1500        u16 rev = 0;
1501
1502        if (is_typec_partner(dev)) {
1503                struct typec_partner *partner = to_typec_partner(dev);
1504
1505                rev = partner->pd_revision;
1506        } else if (is_typec_cable(dev)) {
1507                struct typec_cable *cable = to_typec_cable(dev);
1508
1509                rev = cable->pd_revision;
1510        } else if (is_typec_port(dev)) {
1511                struct typec_port *p = to_typec_port(dev);
1512
1513                rev = p->cap->pd_revision;
1514        }
1515        return sysfs_emit(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
1516}
1517
1518static ssize_t orientation_show(struct device *dev,
1519                                   struct device_attribute *attr,
1520                                   char *buf)
1521{
1522        struct typec_port *port = to_typec_port(dev);
1523
1524        return sprintf(buf, "%s\n", typec_orientations[port->orientation]);
1525}
1526static DEVICE_ATTR_RO(orientation);
1527
1528static struct attribute *typec_attrs[] = {
1529        &dev_attr_data_role.attr,
1530        &dev_attr_power_operation_mode.attr,
1531        &dev_attr_power_role.attr,
1532        &dev_attr_preferred_role.attr,
1533        &dev_attr_supported_accessory_modes.attr,
1534        &dev_attr_usb_power_delivery_revision.attr,
1535        &dev_attr_usb_typec_revision.attr,
1536        &dev_attr_vconn_source.attr,
1537        &dev_attr_port_type.attr,
1538        &dev_attr_orientation.attr,
1539        NULL,
1540};
1541
1542static umode_t typec_attr_is_visible(struct kobject *kobj,
1543                                     struct attribute *attr, int n)
1544{
1545        struct typec_port *port = to_typec_port(kobj_to_dev(kobj));
1546
1547        if (attr == &dev_attr_data_role.attr) {
1548                if (port->cap->data != TYPEC_PORT_DRD ||
1549                    !port->ops || !port->ops->dr_set)
1550                        return 0444;
1551        } else if (attr == &dev_attr_power_role.attr) {
1552                if (port->cap->type != TYPEC_PORT_DRP ||
1553                    !port->ops || !port->ops->pr_set)
1554                        return 0444;
1555        } else if (attr == &dev_attr_vconn_source.attr) {
1556                if (!port->cap->pd_revision ||
1557                    !port->ops || !port->ops->vconn_set)
1558                        return 0444;
1559        } else if (attr == &dev_attr_preferred_role.attr) {
1560                if (port->cap->type != TYPEC_PORT_DRP ||
1561                    !port->ops || !port->ops->try_role)
1562                        return 0444;
1563        } else if (attr == &dev_attr_port_type.attr) {
1564                if (!port->ops || !port->ops->port_type_set)
1565                        return 0;
1566                if (port->cap->type != TYPEC_PORT_DRP)
1567                        return 0444;
1568        } else if (attr == &dev_attr_orientation.attr) {
1569                if (port->cap->orientation_aware)
1570                        return 0444;
1571                return 0;
1572        }
1573
1574        return attr->mode;
1575}
1576
1577static const struct attribute_group typec_group = {
1578        .is_visible = typec_attr_is_visible,
1579        .attrs = typec_attrs,
1580};
1581
1582static const struct attribute_group *typec_groups[] = {
1583        &typec_group,
1584        NULL
1585};
1586
1587static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
1588{
1589        int ret;
1590
1591        ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev));
1592        if (ret)
1593                dev_err(dev, "failed to add uevent TYPEC_PORT\n");
1594
1595        return ret;
1596}
1597
1598static void typec_release(struct device *dev)
1599{
1600        struct typec_port *port = to_typec_port(dev);
1601
1602        ida_simple_remove(&typec_index_ida, port->id);
1603        ida_destroy(&port->mode_ids);
1604        typec_switch_put(port->sw);
1605        typec_mux_put(port->mux);
1606        kfree(port->cap);
1607        kfree(port);
1608}
1609
1610const struct device_type typec_port_dev_type = {
1611        .name = "typec_port",
1612        .groups = typec_groups,
1613        .uevent = typec_uevent,
1614        .release = typec_release,
1615};
1616
1617/* --------------------------------------- */
1618/* Driver callbacks to report role updates */
1619
1620static int partner_match(struct device *dev, void *data)
1621{
1622        return is_typec_partner(dev);
1623}
1624
1625/**
1626 * typec_set_data_role - Report data role change
1627 * @port: The USB Type-C Port where the role was changed
1628 * @role: The new data role
1629 *
1630 * This routine is used by the port drivers to report data role changes.
1631 */
1632void typec_set_data_role(struct typec_port *port, enum typec_data_role role)
1633{
1634        struct device *partner_dev;
1635
1636        if (port->data_role == role)
1637                return;
1638
1639        port->data_role = role;
1640        sysfs_notify(&port->dev.kobj, NULL, "data_role");
1641        kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1642
1643        partner_dev = device_find_child(&port->dev, NULL, partner_match);
1644        if (!partner_dev)
1645                return;
1646
1647        if (to_typec_partner(partner_dev)->identity)
1648                typec_product_type_notify(partner_dev);
1649
1650        put_device(partner_dev);
1651}
1652EXPORT_SYMBOL_GPL(typec_set_data_role);
1653
1654/**
1655 * typec_set_pwr_role - Report power role change
1656 * @port: The USB Type-C Port where the role was changed
1657 * @role: The new data role
1658 *
1659 * This routine is used by the port drivers to report power role changes.
1660 */
1661void typec_set_pwr_role(struct typec_port *port, enum typec_role role)
1662{
1663        if (port->pwr_role == role)
1664                return;
1665
1666        port->pwr_role = role;
1667        sysfs_notify(&port->dev.kobj, NULL, "power_role");
1668        kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1669}
1670EXPORT_SYMBOL_GPL(typec_set_pwr_role);
1671
1672/**
1673 * typec_set_vconn_role - Report VCONN source change
1674 * @port: The USB Type-C Port which VCONN role changed
1675 * @role: Source when @port is sourcing VCONN, or Sink when it's not
1676 *
1677 * This routine is used by the port drivers to report if the VCONN source is
1678 * changes.
1679 */
1680void typec_set_vconn_role(struct typec_port *port, enum typec_role role)
1681{
1682        if (port->vconn_role == role)
1683                return;
1684
1685        port->vconn_role = role;
1686        sysfs_notify(&port->dev.kobj, NULL, "vconn_source");
1687        kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1688}
1689EXPORT_SYMBOL_GPL(typec_set_vconn_role);
1690
1691/**
1692 * typec_set_pwr_opmode - Report changed power operation mode
1693 * @port: The USB Type-C Port where the mode was changed
1694 * @opmode: New power operation mode
1695 *
1696 * This routine is used by the port drivers to report changed power operation
1697 * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB
1698 * Type-C specification, and "USB Power Delivery" when the power levels are
1699 * negotiated with methods defined in USB Power Delivery specification.
1700 */
1701void typec_set_pwr_opmode(struct typec_port *port,
1702                          enum typec_pwr_opmode opmode)
1703{
1704        struct device *partner_dev;
1705
1706        if (port->pwr_opmode == opmode)
1707                return;
1708
1709        port->pwr_opmode = opmode;
1710        sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode");
1711        kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1712
1713        partner_dev = device_find_child(&port->dev, NULL, partner_match);
1714        if (partner_dev) {
1715                struct typec_partner *partner = to_typec_partner(partner_dev);
1716
1717                if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) {
1718                        partner->usb_pd = 1;
1719                        sysfs_notify(&partner_dev->kobj, NULL,
1720                                     "supports_usb_power_delivery");
1721                        kobject_uevent(&partner_dev->kobj, KOBJ_CHANGE);
1722                }
1723                put_device(partner_dev);
1724        }
1725}
1726EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
1727
1728/**
1729 * typec_find_pwr_opmode - Get the typec power operation mode capability
1730 * @name: power operation mode string
1731 *
1732 * This routine is used to find the typec_pwr_opmode by its string @name.
1733 *
1734 * Returns typec_pwr_opmode if success, otherwise negative error code.
1735 */
1736int typec_find_pwr_opmode(const char *name)
1737{
1738        return match_string(typec_pwr_opmodes,
1739                            ARRAY_SIZE(typec_pwr_opmodes), name);
1740}
1741EXPORT_SYMBOL_GPL(typec_find_pwr_opmode);
1742
1743/**
1744 * typec_find_orientation - Convert orientation string to enum typec_orientation
1745 * @name: Orientation string
1746 *
1747 * This routine is used to find the typec_orientation by its string name @name.
1748 *
1749 * Returns the orientation value on success, otherwise negative error code.
1750 */
1751int typec_find_orientation(const char *name)
1752{
1753        return match_string(typec_orientations, ARRAY_SIZE(typec_orientations),
1754                            name);
1755}
1756EXPORT_SYMBOL_GPL(typec_find_orientation);
1757
1758/**
1759 * typec_find_port_power_role - Get the typec port power capability
1760 * @name: port power capability string
1761 *
1762 * This routine is used to find the typec_port_type by its string name.
1763 *
1764 * Returns typec_port_type if success, otherwise negative error code.
1765 */
1766int typec_find_port_power_role(const char *name)
1767{
1768        return match_string(typec_port_power_roles,
1769                            ARRAY_SIZE(typec_port_power_roles), name);
1770}
1771EXPORT_SYMBOL_GPL(typec_find_port_power_role);
1772
1773/**
1774 * typec_find_power_role - Find the typec one specific power role
1775 * @name: power role string
1776 *
1777 * This routine is used to find the typec_role by its string name.
1778 *
1779 * Returns typec_role if success, otherwise negative error code.
1780 */
1781int typec_find_power_role(const char *name)
1782{
1783        return match_string(typec_roles, ARRAY_SIZE(typec_roles), name);
1784}
1785EXPORT_SYMBOL_GPL(typec_find_power_role);
1786
1787/**
1788 * typec_find_port_data_role - Get the typec port data capability
1789 * @name: port data capability string
1790 *
1791 * This routine is used to find the typec_port_data by its string name.
1792 *
1793 * Returns typec_port_data if success, otherwise negative error code.
1794 */
1795int typec_find_port_data_role(const char *name)
1796{
1797        return match_string(typec_port_data_roles,
1798                            ARRAY_SIZE(typec_port_data_roles), name);
1799}
1800EXPORT_SYMBOL_GPL(typec_find_port_data_role);
1801
1802/* ------------------------------------------ */
1803/* API for Multiplexer/DeMultiplexer Switches */
1804
1805/**
1806 * typec_set_orientation - Set USB Type-C cable plug orientation
1807 * @port: USB Type-C Port
1808 * @orientation: USB Type-C cable plug orientation
1809 *
1810 * Set cable plug orientation for @port.
1811 */
1812int typec_set_orientation(struct typec_port *port,
1813                          enum typec_orientation orientation)
1814{
1815        int ret;
1816
1817        ret = typec_switch_set(port->sw, orientation);
1818        if (ret)
1819                return ret;
1820
1821        port->orientation = orientation;
1822        sysfs_notify(&port->dev.kobj, NULL, "orientation");
1823        kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1824
1825        return 0;
1826}
1827EXPORT_SYMBOL_GPL(typec_set_orientation);
1828
1829/**
1830 * typec_get_orientation - Get USB Type-C cable plug orientation
1831 * @port: USB Type-C Port
1832 *
1833 * Get current cable plug orientation for @port.
1834 */
1835enum typec_orientation typec_get_orientation(struct typec_port *port)
1836{
1837        return port->orientation;
1838}
1839EXPORT_SYMBOL_GPL(typec_get_orientation);
1840
1841/**
1842 * typec_set_mode - Set mode of operation for USB Type-C connector
1843 * @port: USB Type-C connector
1844 * @mode: Accessory Mode, USB Operation or Safe State
1845 *
1846 * Configure @port for Accessory Mode @mode. This function will configure the
1847 * muxes needed for @mode.
1848 */
1849int typec_set_mode(struct typec_port *port, int mode)
1850{
1851        struct typec_mux_state state = { };
1852
1853        state.mode = mode;
1854
1855        return typec_mux_set(port->mux, &state);
1856}
1857EXPORT_SYMBOL_GPL(typec_set_mode);
1858
1859/* --------------------------------------- */
1860
1861/**
1862 * typec_get_negotiated_svdm_version - Get negotiated SVDM Version
1863 * @port: USB Type-C Port.
1864 *
1865 * Get the negotiated SVDM Version. The Version is set to the port default
1866 * value stored in typec_capability on partner registration, and updated after
1867 * a successful Discover Identity if the negotiated value is less than the
1868 * default value.
1869 *
1870 * Returns usb_pd_svdm_ver if the partner has been registered otherwise -ENODEV.
1871 */
1872int typec_get_negotiated_svdm_version(struct typec_port *port)
1873{
1874        enum usb_pd_svdm_ver svdm_version;
1875        struct device *partner_dev;
1876
1877        partner_dev = device_find_child(&port->dev, NULL, partner_match);
1878        if (!partner_dev)
1879                return -ENODEV;
1880
1881        svdm_version = to_typec_partner(partner_dev)->svdm_version;
1882        put_device(partner_dev);
1883
1884        return svdm_version;
1885}
1886EXPORT_SYMBOL_GPL(typec_get_negotiated_svdm_version);
1887
1888/**
1889 * typec_get_drvdata - Return private driver data pointer
1890 * @port: USB Type-C port
1891 */
1892void *typec_get_drvdata(struct typec_port *port)
1893{
1894        return dev_get_drvdata(&port->dev);
1895}
1896EXPORT_SYMBOL_GPL(typec_get_drvdata);
1897
1898int typec_get_fw_cap(struct typec_capability *cap,
1899                     struct fwnode_handle *fwnode)
1900{
1901        const char *cap_str;
1902        int ret;
1903
1904        cap->fwnode = fwnode;
1905
1906        ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
1907        if (ret < 0)
1908                return ret;
1909
1910        ret = typec_find_port_power_role(cap_str);
1911        if (ret < 0)
1912                return ret;
1913        cap->type = ret;
1914
1915        /* USB data support is optional */
1916        ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
1917        if (ret == 0) {
1918                ret = typec_find_port_data_role(cap_str);
1919                if (ret < 0)
1920                        return ret;
1921                cap->data = ret;
1922        }
1923
1924        /* Get the preferred power role for a DRP */
1925        if (cap->type == TYPEC_PORT_DRP) {
1926                cap->prefer_role = TYPEC_NO_PREFERRED_ROLE;
1927
1928                ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
1929                if (ret == 0) {
1930                        ret = typec_find_power_role(cap_str);
1931                        if (ret < 0)
1932                                return ret;
1933                        cap->prefer_role = ret;
1934                }
1935        }
1936
1937        return 0;
1938}
1939EXPORT_SYMBOL_GPL(typec_get_fw_cap);
1940
1941/**
1942 * typec_port_register_altmode - Register USB Type-C Port Alternate Mode
1943 * @port: USB Type-C Port that supports the alternate mode
1944 * @desc: Description of the alternate mode
1945 *
1946 * This routine is used to register an alternate mode that @port is capable of
1947 * supporting.
1948 *
1949 * Returns handle to the alternate mode on success or ERR_PTR on failure.
1950 */
1951struct typec_altmode *
1952typec_port_register_altmode(struct typec_port *port,
1953                            const struct typec_altmode_desc *desc)
1954{
1955        struct typec_altmode *adev;
1956        struct typec_mux *mux;
1957
1958        mux = typec_mux_get(&port->dev, desc);
1959        if (IS_ERR(mux))
1960                return ERR_CAST(mux);
1961
1962        adev = typec_register_altmode(&port->dev, desc);
1963        if (IS_ERR(adev))
1964                typec_mux_put(mux);
1965        else
1966                to_altmode(adev)->mux = mux;
1967
1968        return adev;
1969}
1970EXPORT_SYMBOL_GPL(typec_port_register_altmode);
1971
1972void typec_port_register_altmodes(struct typec_port *port,
1973        const struct typec_altmode_ops *ops, void *drvdata,
1974        struct typec_altmode **altmodes, size_t n)
1975{
1976        struct fwnode_handle *altmodes_node, *child;
1977        struct typec_altmode_desc desc;
1978        struct typec_altmode *alt;
1979        size_t index = 0;
1980        u32 svid, vdo;
1981        int ret;
1982
1983        altmodes_node = device_get_named_child_node(&port->dev, "altmodes");
1984        if (!altmodes_node)
1985                return; /* No altmodes specified */
1986
1987        fwnode_for_each_child_node(altmodes_node, child) {
1988                ret = fwnode_property_read_u32(child, "svid", &svid);
1989                if (ret) {
1990                        dev_err(&port->dev, "Error reading svid for altmode %s\n",
1991                                fwnode_get_name(child));
1992                        continue;
1993                }
1994
1995                ret = fwnode_property_read_u32(child, "vdo", &vdo);
1996                if (ret) {
1997                        dev_err(&port->dev, "Error reading vdo for altmode %s\n",
1998                                fwnode_get_name(child));
1999                        continue;
2000                }
2001
2002                if (index >= n) {
2003                        dev_err(&port->dev, "Error not enough space for altmode %s\n",
2004                                fwnode_get_name(child));
2005                        continue;
2006                }
2007
2008                desc.svid = svid;
2009                desc.vdo = vdo;
2010                desc.mode = index + 1;
2011                alt = typec_port_register_altmode(port, &desc);
2012                if (IS_ERR(alt)) {
2013                        dev_err(&port->dev, "Error registering altmode %s\n",
2014                                fwnode_get_name(child));
2015                        continue;
2016                }
2017
2018                alt->ops = ops;
2019                typec_altmode_set_drvdata(alt, drvdata);
2020                altmodes[index] = alt;
2021                index++;
2022        }
2023}
2024EXPORT_SYMBOL_GPL(typec_port_register_altmodes);
2025
2026/**
2027 * typec_register_port - Register a USB Type-C Port
2028 * @parent: Parent device
2029 * @cap: Description of the port
2030 *
2031 * Registers a device for USB Type-C Port described in @cap.
2032 *
2033 * Returns handle to the port on success or ERR_PTR on failure.
2034 */
2035struct typec_port *typec_register_port(struct device *parent,
2036                                       const struct typec_capability *cap)
2037{
2038        struct typec_port *port;
2039        int ret;
2040        int id;
2041
2042        port = kzalloc(sizeof(*port), GFP_KERNEL);
2043        if (!port)
2044                return ERR_PTR(-ENOMEM);
2045
2046        id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL);
2047        if (id < 0) {
2048                kfree(port);
2049                return ERR_PTR(id);
2050        }
2051
2052        switch (cap->type) {
2053        case TYPEC_PORT_SRC:
2054                port->pwr_role = TYPEC_SOURCE;
2055                port->vconn_role = TYPEC_SOURCE;
2056                break;
2057        case TYPEC_PORT_SNK:
2058                port->pwr_role = TYPEC_SINK;
2059                port->vconn_role = TYPEC_SINK;
2060                break;
2061        case TYPEC_PORT_DRP:
2062                if (cap->prefer_role != TYPEC_NO_PREFERRED_ROLE)
2063                        port->pwr_role = cap->prefer_role;
2064                else
2065                        port->pwr_role = TYPEC_SINK;
2066                break;
2067        }
2068
2069        switch (cap->data) {
2070        case TYPEC_PORT_DFP:
2071                port->data_role = TYPEC_HOST;
2072                break;
2073        case TYPEC_PORT_UFP:
2074                port->data_role = TYPEC_DEVICE;
2075                break;
2076        case TYPEC_PORT_DRD:
2077                if (cap->prefer_role == TYPEC_SOURCE)
2078                        port->data_role = TYPEC_HOST;
2079                else
2080                        port->data_role = TYPEC_DEVICE;
2081                break;
2082        }
2083
2084        ida_init(&port->mode_ids);
2085        mutex_init(&port->port_type_lock);
2086
2087        port->id = id;
2088        port->ops = cap->ops;
2089        port->port_type = cap->type;
2090        port->prefer_role = cap->prefer_role;
2091
2092        device_initialize(&port->dev);
2093        port->dev.class = &typec_class;
2094        port->dev.parent = parent;
2095        port->dev.fwnode = cap->fwnode;
2096        port->dev.type = &typec_port_dev_type;
2097        dev_set_name(&port->dev, "port%d", id);
2098        dev_set_drvdata(&port->dev, cap->driver_data);
2099
2100        port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL);
2101        if (!port->cap) {
2102                put_device(&port->dev);
2103                return ERR_PTR(-ENOMEM);
2104        }
2105
2106        port->sw = typec_switch_get(&port->dev);
2107        if (IS_ERR(port->sw)) {
2108                ret = PTR_ERR(port->sw);
2109                put_device(&port->dev);
2110                return ERR_PTR(ret);
2111        }
2112
2113        port->mux = typec_mux_get(&port->dev, NULL);
2114        if (IS_ERR(port->mux)) {
2115                ret = PTR_ERR(port->mux);
2116                put_device(&port->dev);
2117                return ERR_PTR(ret);
2118        }
2119
2120        ret = device_add(&port->dev);
2121        if (ret) {
2122                dev_err(parent, "failed to register port (%d)\n", ret);
2123                put_device(&port->dev);
2124                return ERR_PTR(ret);
2125        }
2126
2127        ret = typec_link_ports(port);
2128        if (ret)
2129                dev_warn(&port->dev, "failed to create symlinks (%d)\n", ret);
2130
2131        return port;
2132}
2133EXPORT_SYMBOL_GPL(typec_register_port);
2134
2135/**
2136 * typec_unregister_port - Unregister a USB Type-C Port
2137 * @port: The port to be unregistered
2138 *
2139 * Unregister device created with typec_register_port().
2140 */
2141void typec_unregister_port(struct typec_port *port)
2142{
2143        if (!IS_ERR_OR_NULL(port)) {
2144                typec_unlink_ports(port);
2145                device_unregister(&port->dev);
2146        }
2147}
2148EXPORT_SYMBOL_GPL(typec_unregister_port);
2149
2150static int __init typec_init(void)
2151{
2152        int ret;
2153
2154        ret = bus_register(&typec_bus);
2155        if (ret)
2156                return ret;
2157
2158        ret = class_register(&typec_mux_class);
2159        if (ret)
2160                goto err_unregister_bus;
2161
2162        ret = class_register(&typec_class);
2163        if (ret)
2164                goto err_unregister_mux_class;
2165
2166        return 0;
2167
2168err_unregister_mux_class:
2169        class_unregister(&typec_mux_class);
2170
2171err_unregister_bus:
2172        bus_unregister(&typec_bus);
2173
2174        return ret;
2175}
2176subsys_initcall(typec_init);
2177
2178static void __exit typec_exit(void)
2179{
2180        class_unregister(&typec_class);
2181        ida_destroy(&typec_index_ida);
2182        bus_unregister(&typec_bus);
2183        class_unregister(&typec_mux_class);
2184}
2185module_exit(typec_exit);
2186
2187MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
2188MODULE_LICENSE("GPL v2");
2189MODULE_DESCRIPTION("USB Type-C Connector Class");
2190