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