2 * USB Type-C Connector Class
4 * Copyright (C) 2017, Intel Corporation
5 * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/device.h>
13 #include <linux/module.h>
14 #include <linux/mutex.h>
15 #include <linux/slab.h>
16 #include <linux/usb/typec.h>
22 enum typec_port_type roles;
24 struct typec_altmode *alt_mode;
26 unsigned int active:1;
29 struct attribute_group group;
30 struct attribute *attrs[5];
31 struct device_attribute vdo_attr;
32 struct device_attribute desc_attr;
33 struct device_attribute active_attr;
34 struct device_attribute roles_attr;
37 struct typec_altmode {
41 struct typec_mode modes[ALTMODE_MAX_MODES];
42 const struct attribute_group *mode_groups[ALTMODE_MAX_MODES];
47 enum typec_plug_index index;
52 enum typec_plug_type type;
53 struct usb_pd_identity *identity;
54 unsigned int active:1;
57 struct typec_partner {
59 unsigned int usb_pd:1;
60 struct usb_pd_identity *identity;
61 enum typec_accessory accessory;
69 enum typec_data_role data_role;
70 enum typec_role pwr_role;
71 enum typec_role vconn_role;
72 enum typec_pwr_opmode pwr_opmode;
73 enum typec_port_type port_type;
74 struct mutex port_type_lock;
76 const struct typec_capability *cap;
79 #define to_typec_port(_dev_) container_of(_dev_, struct typec_port, dev)
80 #define to_typec_plug(_dev_) container_of(_dev_, struct typec_plug, dev)
81 #define to_typec_cable(_dev_) container_of(_dev_, struct typec_cable, dev)
82 #define to_typec_partner(_dev_) container_of(_dev_, struct typec_partner, dev)
83 #define to_altmode(_dev_) container_of(_dev_, struct typec_altmode, dev)
85 static const struct device_type typec_partner_dev_type;
86 static const struct device_type typec_cable_dev_type;
87 static const struct device_type typec_plug_dev_type;
88 static const struct device_type typec_port_dev_type;
90 #define is_typec_partner(_dev_) (_dev_->type == &typec_partner_dev_type)
91 #define is_typec_cable(_dev_) (_dev_->type == &typec_cable_dev_type)
92 #define is_typec_plug(_dev_) (_dev_->type == &typec_plug_dev_type)
93 #define is_typec_port(_dev_) (_dev_->type == &typec_port_dev_type)
95 static DEFINE_IDA(typec_index_ida);
96 static struct class *typec_class;
98 /* Common attributes */
100 static const char * const typec_accessory_modes[] = {
101 [TYPEC_ACCESSORY_NONE] = "none",
102 [TYPEC_ACCESSORY_AUDIO] = "analog_audio",
103 [TYPEC_ACCESSORY_DEBUG] = "debug",
106 static struct usb_pd_identity *get_pd_identity(struct device *dev)
108 if (is_typec_partner(dev)) {
109 struct typec_partner *partner = to_typec_partner(dev);
111 return partner->identity;
112 } else if (is_typec_cable(dev)) {
113 struct typec_cable *cable = to_typec_cable(dev);
115 return cable->identity;
120 static ssize_t id_header_show(struct device *dev, struct device_attribute *attr,
123 struct usb_pd_identity *id = get_pd_identity(dev);
125 return sprintf(buf, "0x%08x\n", id->id_header);
127 static DEVICE_ATTR_RO(id_header);
129 static ssize_t cert_stat_show(struct device *dev, struct device_attribute *attr,
132 struct usb_pd_identity *id = get_pd_identity(dev);
134 return sprintf(buf, "0x%08x\n", id->cert_stat);
136 static DEVICE_ATTR_RO(cert_stat);
138 static ssize_t product_show(struct device *dev, struct device_attribute *attr,
141 struct usb_pd_identity *id = get_pd_identity(dev);
143 return sprintf(buf, "0x%08x\n", id->product);
145 static DEVICE_ATTR_RO(product);
147 static struct attribute *usb_pd_id_attrs[] = {
148 &dev_attr_id_header.attr,
149 &dev_attr_cert_stat.attr,
150 &dev_attr_product.attr,
154 static const struct attribute_group usb_pd_id_group = {
156 .attrs = usb_pd_id_attrs,
159 static const struct attribute_group *usb_pd_id_groups[] = {
164 static void typec_report_identity(struct device *dev)
166 sysfs_notify(&dev->kobj, "identity", "id_header");
167 sysfs_notify(&dev->kobj, "identity", "cert_stat");
168 sysfs_notify(&dev->kobj, "identity", "product");
171 /* ------------------------------------------------------------------------- */
172 /* Alternate Modes */
175 * typec_altmode_update_active - Report Enter/Exit mode
176 * @alt: Handle to the alternate mode
178 * @active: True when the mode has been entered
180 * If a partner or cable plug executes Enter/Exit Mode command successfully, the
181 * drivers use this routine to report the updated state of the mode.
183 void typec_altmode_update_active(struct typec_altmode *alt, int mode,
186 struct typec_mode *m = &alt->modes[mode];
189 if (m->active == active)
193 snprintf(dir, sizeof(dir), "mode%d", mode);
194 sysfs_notify(&alt->dev.kobj, dir, "active");
195 kobject_uevent(&alt->dev.kobj, KOBJ_CHANGE);
197 EXPORT_SYMBOL_GPL(typec_altmode_update_active);
200 * typec_altmode2port - Alternate Mode to USB Type-C port
201 * @alt: The Alternate Mode
203 * Returns handle to the port that a cable plug or partner with @alt is
206 struct typec_port *typec_altmode2port(struct typec_altmode *alt)
208 if (is_typec_plug(alt->dev.parent))
209 return to_typec_port(alt->dev.parent->parent->parent);
210 if (is_typec_partner(alt->dev.parent))
211 return to_typec_port(alt->dev.parent->parent);
212 if (is_typec_port(alt->dev.parent))
213 return to_typec_port(alt->dev.parent);
217 EXPORT_SYMBOL_GPL(typec_altmode2port);
220 typec_altmode_vdo_show(struct device *dev, struct device_attribute *attr,
223 struct typec_mode *mode = container_of(attr, struct typec_mode,
226 return sprintf(buf, "0x%08x\n", mode->vdo);
230 typec_altmode_desc_show(struct device *dev, struct device_attribute *attr,
233 struct typec_mode *mode = container_of(attr, struct typec_mode,
236 return sprintf(buf, "%s\n", mode->desc ? mode->desc : "");
240 typec_altmode_active_show(struct device *dev, struct device_attribute *attr,
243 struct typec_mode *mode = container_of(attr, struct typec_mode,
246 return sprintf(buf, "%s\n", mode->active ? "yes" : "no");
250 typec_altmode_active_store(struct device *dev, struct device_attribute *attr,
251 const char *buf, size_t size)
253 struct typec_mode *mode = container_of(attr, struct typec_mode,
255 struct typec_port *port = typec_altmode2port(mode->alt_mode);
259 if (!port->cap->activate_mode)
262 ret = kstrtobool(buf, &activate);
266 ret = port->cap->activate_mode(port->cap, mode->index, activate);
274 typec_altmode_roles_show(struct device *dev, struct device_attribute *attr,
277 struct typec_mode *mode = container_of(attr, struct typec_mode,
281 switch (mode->roles) {
283 ret = sprintf(buf, "source\n");
286 ret = sprintf(buf, "sink\n");
290 ret = sprintf(buf, "source sink\n");
296 static void typec_init_modes(struct typec_altmode *alt,
297 const struct typec_mode_desc *desc, bool is_port)
301 for (i = 0; i < alt->n_modes; i++, desc++) {
302 struct typec_mode *mode = &alt->modes[i];
304 /* Not considering the human readable description critical */
305 mode->desc = kstrdup(desc->desc, GFP_KERNEL);
306 if (desc->desc && !mode->desc)
307 dev_err(&alt->dev, "failed to copy mode%d desc\n", i);
309 mode->alt_mode = alt;
310 mode->vdo = desc->vdo;
311 mode->roles = desc->roles;
312 mode->index = desc->index;
313 sprintf(mode->group_name, "mode%d", desc->index);
315 sysfs_attr_init(&mode->vdo_attr.attr);
316 mode->vdo_attr.attr.name = "vdo";
317 mode->vdo_attr.attr.mode = 0444;
318 mode->vdo_attr.show = typec_altmode_vdo_show;
320 sysfs_attr_init(&mode->desc_attr.attr);
321 mode->desc_attr.attr.name = "description";
322 mode->desc_attr.attr.mode = 0444;
323 mode->desc_attr.show = typec_altmode_desc_show;
325 sysfs_attr_init(&mode->active_attr.attr);
326 mode->active_attr.attr.name = "active";
327 mode->active_attr.attr.mode = 0644;
328 mode->active_attr.show = typec_altmode_active_show;
329 mode->active_attr.store = typec_altmode_active_store;
331 mode->attrs[0] = &mode->vdo_attr.attr;
332 mode->attrs[1] = &mode->desc_attr.attr;
333 mode->attrs[2] = &mode->active_attr.attr;
335 /* With ports, list the roles that the mode is supported with */
337 sysfs_attr_init(&mode->roles_attr.attr);
338 mode->roles_attr.attr.name = "supported_roles";
339 mode->roles_attr.attr.mode = 0444;
340 mode->roles_attr.show = typec_altmode_roles_show;
342 mode->attrs[3] = &mode->roles_attr.attr;
345 mode->group.attrs = mode->attrs;
346 mode->group.name = mode->group_name;
348 alt->mode_groups[i] = &mode->group;
352 static ssize_t svid_show(struct device *dev, struct device_attribute *attr,
355 struct typec_altmode *alt = to_altmode(dev);
357 return sprintf(buf, "%04x\n", alt->svid);
359 static DEVICE_ATTR_RO(svid);
361 static struct attribute *typec_altmode_attrs[] = {
365 ATTRIBUTE_GROUPS(typec_altmode);
367 static void typec_altmode_release(struct device *dev)
369 struct typec_altmode *alt = to_altmode(dev);
372 for (i = 0; i < alt->n_modes; i++)
373 kfree(alt->modes[i].desc);
377 static const struct device_type typec_altmode_dev_type = {
378 .name = "typec_alternate_mode",
379 .groups = typec_altmode_groups,
380 .release = typec_altmode_release,
383 static struct typec_altmode *
384 typec_register_altmode(struct device *parent,
385 const struct typec_altmode_desc *desc)
387 struct typec_altmode *alt;
390 alt = kzalloc(sizeof(*alt), GFP_KERNEL);
394 alt->svid = desc->svid;
395 alt->n_modes = desc->n_modes;
396 typec_init_modes(alt, desc->modes, is_typec_port(parent));
398 alt->dev.parent = parent;
399 alt->dev.groups = alt->mode_groups;
400 alt->dev.type = &typec_altmode_dev_type;
401 dev_set_name(&alt->dev, "svid-%04x", alt->svid);
403 ret = device_register(&alt->dev);
405 dev_err(parent, "failed to register alternate mode (%d)\n",
407 put_device(&alt->dev);
415 * typec_unregister_altmode - Unregister Alternate Mode
416 * @alt: The alternate mode to be unregistered
418 * Unregister device created with typec_partner_register_altmode(),
419 * typec_plug_register_altmode() or typec_port_register_altmode().
421 void typec_unregister_altmode(struct typec_altmode *alt)
424 device_unregister(&alt->dev);
426 EXPORT_SYMBOL_GPL(typec_unregister_altmode);
428 /* ------------------------------------------------------------------------- */
429 /* Type-C Partners */
431 static ssize_t accessory_mode_show(struct device *dev,
432 struct device_attribute *attr,
435 struct typec_partner *p = to_typec_partner(dev);
437 return sprintf(buf, "%s\n", typec_accessory_modes[p->accessory]);
439 static DEVICE_ATTR_RO(accessory_mode);
441 static ssize_t supports_usb_power_delivery_show(struct device *dev,
442 struct device_attribute *attr,
445 struct typec_partner *p = to_typec_partner(dev);
447 return sprintf(buf, "%s\n", p->usb_pd ? "yes" : "no");
449 static DEVICE_ATTR_RO(supports_usb_power_delivery);
451 static struct attribute *typec_partner_attrs[] = {
452 &dev_attr_accessory_mode.attr,
453 &dev_attr_supports_usb_power_delivery.attr,
456 ATTRIBUTE_GROUPS(typec_partner);
458 static void typec_partner_release(struct device *dev)
460 struct typec_partner *partner = to_typec_partner(dev);
465 static const struct device_type typec_partner_dev_type = {
466 .name = "typec_partner",
467 .groups = typec_partner_groups,
468 .release = typec_partner_release,
472 * typec_partner_set_identity - Report result from Discover Identity command
473 * @partner: The partner updated identity values
475 * This routine is used to report that the result of Discover Identity USB power
476 * delivery command has become available.
478 int typec_partner_set_identity(struct typec_partner *partner)
480 if (!partner->identity)
483 typec_report_identity(&partner->dev);
486 EXPORT_SYMBOL_GPL(typec_partner_set_identity);
489 * typec_partner_register_altmode - Register USB Type-C Partner Alternate Mode
490 * @partner: USB Type-C Partner that supports the alternate mode
491 * @desc: Description of the alternate mode
493 * This routine is used to register each alternate mode individually that
494 * @partner has listed in response to Discover SVIDs command. The modes for a
495 * SVID listed in response to Discover Modes command need to be listed in an
498 * Returns handle to the alternate mode on success or NULL on failure.
500 struct typec_altmode *
501 typec_partner_register_altmode(struct typec_partner *partner,
502 const struct typec_altmode_desc *desc)
504 return typec_register_altmode(&partner->dev, desc);
506 EXPORT_SYMBOL_GPL(typec_partner_register_altmode);
509 * typec_register_partner - Register a USB Type-C Partner
510 * @port: The USB Type-C Port the partner is connected to
511 * @desc: Description of the partner
513 * Registers a device for USB Type-C Partner described in @desc.
515 * Returns handle to the partner on success or NULL on failure.
517 struct typec_partner *typec_register_partner(struct typec_port *port,
518 struct typec_partner_desc *desc)
520 struct typec_partner *partner;
523 partner = kzalloc(sizeof(*partner), GFP_KERNEL);
527 partner->usb_pd = desc->usb_pd;
528 partner->accessory = desc->accessory;
530 if (desc->identity) {
532 * Creating directory for the identity only if the driver is
533 * able to provide data to it.
535 partner->dev.groups = usb_pd_id_groups;
536 partner->identity = desc->identity;
539 partner->dev.class = typec_class;
540 partner->dev.parent = &port->dev;
541 partner->dev.type = &typec_partner_dev_type;
542 dev_set_name(&partner->dev, "%s-partner", dev_name(&port->dev));
544 ret = device_register(&partner->dev);
546 dev_err(&port->dev, "failed to register partner (%d)\n", ret);
547 put_device(&partner->dev);
553 EXPORT_SYMBOL_GPL(typec_register_partner);
556 * typec_unregister_partner - Unregister a USB Type-C Partner
557 * @partner: The partner to be unregistered
559 * Unregister device created with typec_register_partner().
561 void typec_unregister_partner(struct typec_partner *partner)
564 device_unregister(&partner->dev);
566 EXPORT_SYMBOL_GPL(typec_unregister_partner);
568 /* ------------------------------------------------------------------------- */
569 /* Type-C Cable Plugs */
571 static void typec_plug_release(struct device *dev)
573 struct typec_plug *plug = to_typec_plug(dev);
578 static const struct device_type typec_plug_dev_type = {
579 .name = "typec_plug",
580 .release = typec_plug_release,
584 * typec_plug_register_altmode - Register USB Type-C Cable Plug Alternate Mode
585 * @plug: USB Type-C Cable Plug that supports the alternate mode
586 * @desc: Description of the alternate mode
588 * This routine is used to register each alternate mode individually that @plug
589 * has listed in response to Discover SVIDs command. The modes for a SVID that
590 * the plug lists in response to Discover Modes command need to be listed in an
593 * Returns handle to the alternate mode on success or NULL on failure.
595 struct typec_altmode *
596 typec_plug_register_altmode(struct typec_plug *plug,
597 const struct typec_altmode_desc *desc)
599 return typec_register_altmode(&plug->dev, desc);
601 EXPORT_SYMBOL_GPL(typec_plug_register_altmode);
604 * typec_register_plug - Register a USB Type-C Cable Plug
605 * @cable: USB Type-C Cable with the plug
606 * @desc: Description of the cable plug
608 * Registers a device for USB Type-C Cable Plug described in @desc. A USB Type-C
609 * Cable Plug represents a plug with electronics in it that can response to USB
610 * Power Delivery SOP Prime or SOP Double Prime packages.
612 * Returns handle to the cable plug on success or NULL on failure.
614 struct typec_plug *typec_register_plug(struct typec_cable *cable,
615 struct typec_plug_desc *desc)
617 struct typec_plug *plug;
621 plug = kzalloc(sizeof(*plug), GFP_KERNEL);
625 sprintf(name, "plug%d", desc->index);
627 plug->index = desc->index;
628 plug->dev.class = typec_class;
629 plug->dev.parent = &cable->dev;
630 plug->dev.type = &typec_plug_dev_type;
631 dev_set_name(&plug->dev, "%s-%s", dev_name(cable->dev.parent), name);
633 ret = device_register(&plug->dev);
635 dev_err(&cable->dev, "failed to register plug (%d)\n", ret);
636 put_device(&plug->dev);
642 EXPORT_SYMBOL_GPL(typec_register_plug);
645 * typec_unregister_plug - Unregister a USB Type-C Cable Plug
646 * @plug: The cable plug to be unregistered
648 * Unregister device created with typec_register_plug().
650 void typec_unregister_plug(struct typec_plug *plug)
653 device_unregister(&plug->dev);
655 EXPORT_SYMBOL_GPL(typec_unregister_plug);
660 type_show(struct device *dev, struct device_attribute *attr, char *buf)
662 struct typec_cable *cable = to_typec_cable(dev);
664 return sprintf(buf, "%s\n", cable->active ? "active" : "passive");
666 static DEVICE_ATTR_RO(type);
668 static const char * const typec_plug_types[] = {
669 [USB_PLUG_NONE] = "unknown",
670 [USB_PLUG_TYPE_A] = "type-a",
671 [USB_PLUG_TYPE_B] = "type-b",
672 [USB_PLUG_TYPE_C] = "type-c",
673 [USB_PLUG_CAPTIVE] = "captive",
676 static ssize_t plug_type_show(struct device *dev,
677 struct device_attribute *attr, char *buf)
679 struct typec_cable *cable = to_typec_cable(dev);
681 return sprintf(buf, "%s\n", typec_plug_types[cable->type]);
683 static DEVICE_ATTR_RO(plug_type);
685 static struct attribute *typec_cable_attrs[] = {
687 &dev_attr_plug_type.attr,
690 ATTRIBUTE_GROUPS(typec_cable);
692 static void typec_cable_release(struct device *dev)
694 struct typec_cable *cable = to_typec_cable(dev);
699 static const struct device_type typec_cable_dev_type = {
700 .name = "typec_cable",
701 .groups = typec_cable_groups,
702 .release = typec_cable_release,
706 * typec_cable_set_identity - Report result from Discover Identity command
707 * @cable: The cable updated identity values
709 * This routine is used to report that the result of Discover Identity USB power
710 * delivery command has become available.
712 int typec_cable_set_identity(struct typec_cable *cable)
714 if (!cable->identity)
717 typec_report_identity(&cable->dev);
720 EXPORT_SYMBOL_GPL(typec_cable_set_identity);
723 * typec_register_cable - Register a USB Type-C Cable
724 * @port: The USB Type-C Port the cable is connected to
725 * @desc: Description of the cable
727 * Registers a device for USB Type-C Cable described in @desc. The cable will be
728 * parent for the optional cable plug devises.
730 * Returns handle to the cable on success or NULL on failure.
732 struct typec_cable *typec_register_cable(struct typec_port *port,
733 struct typec_cable_desc *desc)
735 struct typec_cable *cable;
738 cable = kzalloc(sizeof(*cable), GFP_KERNEL);
742 cable->type = desc->type;
743 cable->active = desc->active;
745 if (desc->identity) {
747 * Creating directory for the identity only if the driver is
748 * able to provide data to it.
750 cable->dev.groups = usb_pd_id_groups;
751 cable->identity = desc->identity;
754 cable->dev.class = typec_class;
755 cable->dev.parent = &port->dev;
756 cable->dev.type = &typec_cable_dev_type;
757 dev_set_name(&cable->dev, "%s-cable", dev_name(&port->dev));
759 ret = device_register(&cable->dev);
761 dev_err(&port->dev, "failed to register cable (%d)\n", ret);
762 put_device(&cable->dev);
768 EXPORT_SYMBOL_GPL(typec_register_cable);
771 * typec_unregister_cable - Unregister a USB Type-C Cable
772 * @cable: The cable to be unregistered
774 * Unregister device created with typec_register_cable().
776 void typec_unregister_cable(struct typec_cable *cable)
779 device_unregister(&cable->dev);
781 EXPORT_SYMBOL_GPL(typec_unregister_cable);
783 /* ------------------------------------------------------------------------- */
784 /* USB Type-C ports */
786 static const char * const typec_roles[] = {
787 [TYPEC_SINK] = "sink",
788 [TYPEC_SOURCE] = "source",
791 static const char * const typec_data_roles[] = {
792 [TYPEC_DEVICE] = "device",
793 [TYPEC_HOST] = "host",
796 static const char * const typec_port_types[] = {
797 [TYPEC_PORT_DFP] = "source",
798 [TYPEC_PORT_UFP] = "sink",
799 [TYPEC_PORT_DRP] = "dual",
802 static const char * const typec_port_types_drp[] = {
803 [TYPEC_PORT_DFP] = "dual [source] sink",
804 [TYPEC_PORT_UFP] = "dual source [sink]",
805 [TYPEC_PORT_DRP] = "[dual] source sink",
809 preferred_role_store(struct device *dev, struct device_attribute *attr,
810 const char *buf, size_t size)
812 struct typec_port *port = to_typec_port(dev);
816 if (port->cap->type != TYPEC_PORT_DRP) {
817 dev_dbg(dev, "Preferred role only supported with DRP ports\n");
821 if (!port->cap->try_role) {
822 dev_dbg(dev, "Setting preferred role not supported\n");
826 role = sysfs_match_string(typec_roles, buf);
828 if (sysfs_streq(buf, "none"))
829 role = TYPEC_NO_PREFERRED_ROLE;
834 ret = port->cap->try_role(port->cap, role);
838 port->prefer_role = role;
843 preferred_role_show(struct device *dev, struct device_attribute *attr,
846 struct typec_port *port = to_typec_port(dev);
848 if (port->cap->type != TYPEC_PORT_DRP)
851 if (port->prefer_role < 0)
854 return sprintf(buf, "%s\n", typec_roles[port->prefer_role]);
856 static DEVICE_ATTR_RW(preferred_role);
858 static ssize_t data_role_store(struct device *dev,
859 struct device_attribute *attr,
860 const char *buf, size_t size)
862 struct typec_port *port = to_typec_port(dev);
865 if (!port->cap->dr_set) {
866 dev_dbg(dev, "data role swapping not supported\n");
870 ret = sysfs_match_string(typec_data_roles, buf);
874 mutex_lock(&port->port_type_lock);
875 if (port->port_type != TYPEC_PORT_DRP) {
876 dev_dbg(dev, "port type fixed at \"%s\"",
877 typec_port_types[port->port_type]);
882 ret = port->cap->dr_set(port->cap, ret);
888 mutex_unlock(&port->port_type_lock);
892 static ssize_t data_role_show(struct device *dev,
893 struct device_attribute *attr, char *buf)
895 struct typec_port *port = to_typec_port(dev);
897 if (port->cap->type == TYPEC_PORT_DRP)
898 return sprintf(buf, "%s\n", port->data_role == TYPEC_HOST ?
899 "[host] device" : "host [device]");
901 return sprintf(buf, "[%s]\n", typec_data_roles[port->data_role]);
903 static DEVICE_ATTR_RW(data_role);
905 static ssize_t power_role_store(struct device *dev,
906 struct device_attribute *attr,
907 const char *buf, size_t size)
909 struct typec_port *port = to_typec_port(dev);
912 if (!port->cap->pd_revision) {
913 dev_dbg(dev, "USB Power Delivery not supported\n");
917 if (!port->cap->pr_set) {
918 dev_dbg(dev, "power role swapping not supported\n");
922 if (port->pwr_opmode != TYPEC_PWR_MODE_PD) {
923 dev_dbg(dev, "partner unable to swap power role\n");
927 ret = sysfs_match_string(typec_roles, buf);
931 mutex_lock(&port->port_type_lock);
932 if (port->port_type != TYPEC_PORT_DRP) {
933 dev_dbg(dev, "port type fixed at \"%s\"",
934 typec_port_types[port->port_type]);
939 ret = port->cap->pr_set(port->cap, ret);
945 mutex_unlock(&port->port_type_lock);
949 static ssize_t power_role_show(struct device *dev,
950 struct device_attribute *attr, char *buf)
952 struct typec_port *port = to_typec_port(dev);
954 if (port->cap->type == TYPEC_PORT_DRP)
955 return sprintf(buf, "%s\n", port->pwr_role == TYPEC_SOURCE ?
956 "[source] sink" : "source [sink]");
958 return sprintf(buf, "[%s]\n", typec_roles[port->pwr_role]);
960 static DEVICE_ATTR_RW(power_role);
963 port_type_store(struct device *dev, struct device_attribute *attr,
964 const char *buf, size_t size)
966 struct typec_port *port = to_typec_port(dev);
968 enum typec_port_type type;
970 if (!port->cap->port_type_set || port->cap->type != TYPEC_PORT_DRP) {
971 dev_dbg(dev, "changing port type not supported\n");
975 ret = sysfs_match_string(typec_port_types, buf);
980 mutex_lock(&port->port_type_lock);
982 if (port->port_type == type) {
987 ret = port->cap->port_type_set(port->cap, type);
991 port->port_type = type;
995 mutex_unlock(&port->port_type_lock);
1000 port_type_show(struct device *dev, struct device_attribute *attr,
1003 struct typec_port *port = to_typec_port(dev);
1005 if (port->cap->type == TYPEC_PORT_DRP)
1006 return sprintf(buf, "%s\n",
1007 typec_port_types_drp[port->port_type]);
1009 return sprintf(buf, "[%s]\n", typec_port_types[port->cap->type]);
1011 static DEVICE_ATTR_RW(port_type);
1013 static const char * const typec_pwr_opmodes[] = {
1014 [TYPEC_PWR_MODE_USB] = "default",
1015 [TYPEC_PWR_MODE_1_5A] = "1.5A",
1016 [TYPEC_PWR_MODE_3_0A] = "3.0A",
1017 [TYPEC_PWR_MODE_PD] = "usb_power_delivery",
1020 static ssize_t power_operation_mode_show(struct device *dev,
1021 struct device_attribute *attr,
1024 struct typec_port *port = to_typec_port(dev);
1026 return sprintf(buf, "%s\n", typec_pwr_opmodes[port->pwr_opmode]);
1028 static DEVICE_ATTR_RO(power_operation_mode);
1030 static ssize_t vconn_source_store(struct device *dev,
1031 struct device_attribute *attr,
1032 const char *buf, size_t size)
1034 struct typec_port *port = to_typec_port(dev);
1038 if (!port->cap->pd_revision) {
1039 dev_dbg(dev, "VCONN swap depends on USB Power Delivery\n");
1043 if (!port->cap->vconn_set) {
1044 dev_dbg(dev, "VCONN swapping not supported\n");
1048 ret = kstrtobool(buf, &source);
1052 ret = port->cap->vconn_set(port->cap, (enum typec_role)source);
1059 static ssize_t vconn_source_show(struct device *dev,
1060 struct device_attribute *attr, char *buf)
1062 struct typec_port *port = to_typec_port(dev);
1064 return sprintf(buf, "%s\n",
1065 port->vconn_role == TYPEC_SOURCE ? "yes" : "no");
1067 static DEVICE_ATTR_RW(vconn_source);
1069 static ssize_t supported_accessory_modes_show(struct device *dev,
1070 struct device_attribute *attr,
1073 struct typec_port *port = to_typec_port(dev);
1077 for (i = 0; i < ARRAY_SIZE(port->cap->accessory); i++) {
1078 if (port->cap->accessory[i])
1079 ret += sprintf(buf + ret, "%s ",
1080 typec_accessory_modes[port->cap->accessory[i]]);
1084 return sprintf(buf, "none\n");
1086 buf[ret - 1] = '\n';
1090 static DEVICE_ATTR_RO(supported_accessory_modes);
1092 static ssize_t usb_typec_revision_show(struct device *dev,
1093 struct device_attribute *attr,
1096 struct typec_port *port = to_typec_port(dev);
1097 u16 rev = port->cap->revision;
1099 return sprintf(buf, "%d.%d\n", (rev >> 8) & 0xff, (rev >> 4) & 0xf);
1101 static DEVICE_ATTR_RO(usb_typec_revision);
1103 static ssize_t usb_power_delivery_revision_show(struct device *dev,
1104 struct device_attribute *attr,
1107 struct typec_port *p = to_typec_port(dev);
1109 return sprintf(buf, "%d\n", (p->cap->pd_revision >> 8) & 0xff);
1111 static DEVICE_ATTR_RO(usb_power_delivery_revision);
1113 static struct attribute *typec_attrs[] = {
1114 &dev_attr_data_role.attr,
1115 &dev_attr_power_operation_mode.attr,
1116 &dev_attr_power_role.attr,
1117 &dev_attr_preferred_role.attr,
1118 &dev_attr_supported_accessory_modes.attr,
1119 &dev_attr_usb_power_delivery_revision.attr,
1120 &dev_attr_usb_typec_revision.attr,
1121 &dev_attr_vconn_source.attr,
1122 &dev_attr_port_type.attr,
1125 ATTRIBUTE_GROUPS(typec);
1127 static int typec_uevent(struct device *dev, struct kobj_uevent_env *env)
1131 ret = add_uevent_var(env, "TYPEC_PORT=%s", dev_name(dev));
1133 dev_err(dev, "failed to add uevent TYPEC_PORT\n");
1138 static void typec_release(struct device *dev)
1140 struct typec_port *port = to_typec_port(dev);
1142 ida_simple_remove(&typec_index_ida, port->id);
1146 static const struct device_type typec_port_dev_type = {
1147 .name = "typec_port",
1148 .groups = typec_groups,
1149 .uevent = typec_uevent,
1150 .release = typec_release,
1153 /* --------------------------------------- */
1154 /* Driver callbacks to report role updates */
1157 * typec_set_data_role - Report data role change
1158 * @port: The USB Type-C Port where the role was changed
1159 * @role: The new data role
1161 * This routine is used by the port drivers to report data role changes.
1163 void typec_set_data_role(struct typec_port *port, enum typec_data_role role)
1165 if (port->data_role == role)
1168 port->data_role = role;
1169 sysfs_notify(&port->dev.kobj, NULL, "data_role");
1170 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1172 EXPORT_SYMBOL_GPL(typec_set_data_role);
1175 * typec_set_pwr_role - Report power role change
1176 * @port: The USB Type-C Port where the role was changed
1177 * @role: The new data role
1179 * This routine is used by the port drivers to report power role changes.
1181 void typec_set_pwr_role(struct typec_port *port, enum typec_role role)
1183 if (port->pwr_role == role)
1186 port->pwr_role = role;
1187 sysfs_notify(&port->dev.kobj, NULL, "power_role");
1188 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1190 EXPORT_SYMBOL_GPL(typec_set_pwr_role);
1193 * typec_set_pwr_role - Report VCONN source change
1194 * @port: The USB Type-C Port which VCONN role changed
1195 * @role: Source when @port is sourcing VCONN, or Sink when it's not
1197 * This routine is used by the port drivers to report if the VCONN source is
1200 void typec_set_vconn_role(struct typec_port *port, enum typec_role role)
1202 if (port->vconn_role == role)
1205 port->vconn_role = role;
1206 sysfs_notify(&port->dev.kobj, NULL, "vconn_source");
1207 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1209 EXPORT_SYMBOL_GPL(typec_set_vconn_role);
1211 static int partner_match(struct device *dev, void *data)
1213 return is_typec_partner(dev);
1217 * typec_set_pwr_opmode - Report changed power operation mode
1218 * @port: The USB Type-C Port where the mode was changed
1219 * @opmode: New power operation mode
1221 * This routine is used by the port drivers to report changed power operation
1222 * mode in @port. The modes are USB (default), 1.5A, 3.0A as defined in USB
1223 * Type-C specification, and "USB Power Delivery" when the power levels are
1224 * negotiated with methods defined in USB Power Delivery specification.
1226 void typec_set_pwr_opmode(struct typec_port *port,
1227 enum typec_pwr_opmode opmode)
1229 struct device *partner_dev;
1231 if (port->pwr_opmode == opmode)
1234 port->pwr_opmode = opmode;
1235 sysfs_notify(&port->dev.kobj, NULL, "power_operation_mode");
1236 kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
1238 partner_dev = device_find_child(&port->dev, NULL, partner_match);
1240 struct typec_partner *partner = to_typec_partner(partner_dev);
1242 if (opmode == TYPEC_PWR_MODE_PD && !partner->usb_pd) {
1243 partner->usb_pd = 1;
1244 sysfs_notify(&partner_dev->kobj, NULL,
1245 "supports_usb_power_delivery");
1247 put_device(partner_dev);
1250 EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
1252 /* --------------------------------------- */
1255 * typec_port_register_altmode - Register USB Type-C Port Alternate Mode
1256 * @port: USB Type-C Port that supports the alternate mode
1257 * @desc: Description of the alternate mode
1259 * This routine is used to register an alternate mode that @port is capable of
1262 * Returns handle to the alternate mode on success or NULL on failure.
1264 struct typec_altmode *
1265 typec_port_register_altmode(struct typec_port *port,
1266 const struct typec_altmode_desc *desc)
1268 return typec_register_altmode(&port->dev, desc);
1270 EXPORT_SYMBOL_GPL(typec_port_register_altmode);
1273 * typec_register_port - Register a USB Type-C Port
1274 * @parent: Parent device
1275 * @cap: Description of the port
1277 * Registers a device for USB Type-C Port described in @cap.
1279 * Returns handle to the port on success or NULL on failure.
1281 struct typec_port *typec_register_port(struct device *parent,
1282 const struct typec_capability *cap)
1284 struct typec_port *port;
1289 port = kzalloc(sizeof(*port), GFP_KERNEL);
1293 id = ida_simple_get(&typec_index_ida, 0, 0, GFP_KERNEL);
1299 if (cap->type == TYPEC_PORT_DFP)
1300 role = TYPEC_SOURCE;
1301 else if (cap->type == TYPEC_PORT_UFP)
1304 role = cap->prefer_role;
1306 if (role == TYPEC_SOURCE) {
1307 port->data_role = TYPEC_HOST;
1308 port->pwr_role = TYPEC_SOURCE;
1309 port->vconn_role = TYPEC_SOURCE;
1311 port->data_role = TYPEC_DEVICE;
1312 port->pwr_role = TYPEC_SINK;
1313 port->vconn_role = TYPEC_SINK;
1318 port->port_type = cap->type;
1319 mutex_init(&port->port_type_lock);
1320 port->prefer_role = cap->prefer_role;
1322 port->dev.class = typec_class;
1323 port->dev.parent = parent;
1324 port->dev.fwnode = cap->fwnode;
1325 port->dev.type = &typec_port_dev_type;
1326 dev_set_name(&port->dev, "port%d", id);
1328 ret = device_register(&port->dev);
1330 dev_err(parent, "failed to register port (%d)\n", ret);
1331 put_device(&port->dev);
1337 EXPORT_SYMBOL_GPL(typec_register_port);
1340 * typec_unregister_port - Unregister a USB Type-C Port
1341 * @port: The port to be unregistered
1343 * Unregister device created with typec_register_port().
1345 void typec_unregister_port(struct typec_port *port)
1348 device_unregister(&port->dev);
1350 EXPORT_SYMBOL_GPL(typec_unregister_port);
1352 static int __init typec_init(void)
1354 typec_class = class_create(THIS_MODULE, "typec");
1355 return PTR_ERR_OR_ZERO(typec_class);
1357 subsys_initcall(typec_init);
1359 static void __exit typec_exit(void)
1361 class_destroy(typec_class);
1362 ida_destroy(&typec_index_ida);
1364 module_exit(typec_exit);
1366 MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
1367 MODULE_LICENSE("GPL v2");
1368 MODULE_DESCRIPTION("USB Type-C Connector Class");