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