1 USB Type-C port devices (eg. /sys/class/typec/port0/)
3 What: /sys/class/typec/<port>/data_role
5 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
7 The supported USB data roles. This attribute can be used for
8 requesting data role swapping on the port. Swapping is supported
9 as synchronous operation, so write(2) to the attribute will not
10 return until the operation has finished. The attribute is
11 notified about role changes so that poll(2) on the attribute
12 wakes up. Change on the role will also generate uevent
13 KOBJ_CHANGE on the port. The current role is show in brackets,
14 for example "[host] device" when DRP port is in host mode.
16 Valid values: host, device
18 What: /sys/class/typec/<port>/power_role
20 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
22 The supported power roles. This attribute can be used to request
23 power role swap on the port. Swapping is supported as
24 synchronous operation, so write(2) to the attribute will not
25 return until the operation has finished. The attribute is
26 notified about role changes so that poll(2) on the attribute
27 wakes up. Change on the role will also generate uevent
28 KOBJ_CHANGE. The current role is show in brackets, for example
29 "[source] sink" when in source mode.
31 Valid values: source, sink
33 What: /sys/class/typec/<port>/port_type
35 Contact: Badhri Jagan Sridharan <Badhri@google.com>
37 Indicates the type of the port. This attribute can be used for
38 requesting a change in the port type. Port type change is
39 supported as a synchronous operation, so write(2) to the
40 attribute will not return until the operation has finished.
44 ====== ==============================================
45 source (The port will behave as source only DFP port)
46 sink (The port will behave as sink only UFP port)
47 dual (The port will behave as dual-role-data and
49 ====== ==============================================
51 What: /sys/class/typec/<port>/vconn_source
53 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
55 Shows is the port VCONN Source. This attribute can be used to
56 request VCONN swap to change the VCONN Source during connection
57 when both the port and the partner support USB Power Delivery.
58 Swapping is supported as synchronous operation, so write(2) to
59 the attribute will not return until the operation has finished.
60 The attribute is notified about VCONN source changes so that
61 poll(2) on the attribute wakes up. Change on VCONN source also
62 generates uevent KOBJ_CHANGE.
66 - "no" when the port is not the VCONN Source
67 - "yes" when the port is the VCONN Source
69 What: /sys/class/typec/<port>/power_operation_mode
71 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
73 Shows the current power operational mode the port is in. The
74 power operation mode means current level for VBUS. In case USB
75 Power Delivery communication is used for negotiating the levels,
76 power operation mode should show "usb_power_delivery".
85 What: /sys/class/typec/<port>/preferred_role
87 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
89 The user space can notify the driver about the preferred role.
90 It should be handled as enabling of Try.SRC or Try.SNK, as
91 defined in USB Type-C specification, in the port drivers. By
92 default the preferred role should come from the platform.
94 Valid values: source, sink, none (to remove preference)
96 What: /sys/class/typec/<port>/supported_accessory_modes
98 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
100 Space separated list of accessory modes, defined in the USB
101 Type-C specification, the port supports.
103 What: /sys/class/typec/<port>/usb_power_delivery_revision
105 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
107 Revision number of the supported USB Power Delivery
108 specification, or 0.0 when USB Power Delivery is not supported.
111 - "2.0": USB Power Delivery Release 2.0
112 - "3.0": USB Power Delivery Release 3.0
113 - "3.1": USB Power Delivery Release 3.1
115 What: /sys/class/typec/<port>-{partner|cable}/usb_power_delivery_revision
117 Contact: Benson Leung <bleung@chromium.org>
119 Revision number of the supported USB Power Delivery
120 specification of the port partner or cable, or 0.0 when USB
121 Power Delivery is not supported.
124 - "2.0": USB Power Delivery Release 2.0
125 - "3.0": USB Power Delivery Release 3.0
126 - "3.1": USB Power Delivery Release 3.1
128 What: /sys/class/typec/<port>/usb_typec_revision
130 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
132 Revision number of the supported USB Type-C specification.
134 What: /sys/class/typec/<port>/orientation
136 Contact: Badhri Jagan Sridharan <badhri@google.com>
138 Indicates the active orientation of the Type-C connector.
140 - "normal": CC1 orientation
141 - "reverse": CC2 orientation
142 - "unknown": Orientation cannot be determined.
144 What: /sys/class/typec/<port>/select_usb_power_delivery
146 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
148 Lists the USB Power Delivery Capabilities that the port can
149 advertise to the partner. The currently used capabilities are in
150 brackets. Selection happens by writing to the file.
152 What: /sys/class/typec/<port>/usb_capability
154 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
155 Description: Lists the supported USB Modes. The default USB mode that is used
156 next time with the Enter_USB Message is in brackets. The default
157 mode can be changed by writing to the file when supported by the
165 USB Type-C partner devices (eg. /sys/class/typec/port0-partner/)
167 What: /sys/class/typec/<port>-partner/accessory_mode
169 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
171 Shows the Accessory Mode name when the partner is an Accessory.
172 The Accessory Modes are defined in USB Type-C Specification.
174 What: /sys/class/typec/<port>-partner/supports_usb_power_delivery
176 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
178 Shows if the partner supports USB Power Delivery communication:
179 Valid values: yes, no
181 What: /sys/class/typec/<port>-partner/number_of_alternate_modes
183 Contact: Prashant Malani <pmalani@chromium.org>
185 Shows the number of alternate modes which are advertised by the partner
186 during Power Delivery discovery. This file remains hidden until a value
187 greater than or equal to 0 is set by Type C port driver.
189 What: /sys/class/typec/<port>-partner/type
191 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
192 Description: USB Power Delivery Specification defines a set of product types
193 for the partner devices. This file will show the product type of
194 the partner if it is known. Dual-role capable partners will have
195 both UFP and DFP product types defined, but only one that
196 matches the current role will be active at the time. If the
197 product type of the partner is not visible to the device driver,
198 this file will not exist.
200 When the partner product type is detected, or changed with role
201 swap, uvevent is also raised that contains PRODUCT_TYPE=<product
202 type> (for example PRODUCT_TYPE=hub).
207 ====================== ==========================
210 peripheral PDUSB Peripheral
212 ama Alternate Mode Adapter
213 ====================== ==========================
216 ====================== ==========================
220 power_brick Power Brick
221 amc Alternate Mode Controller
222 ====================== ==========================
224 What: /sys/class/typec/<port>-partner/identity/
226 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
228 This directory appears only if the port device driver is capable
229 of showing the result of Discover Identity USB power delivery
230 command. That will not always be possible even when USB power
231 delivery is supported, for example when USB power delivery
232 communication for the port is mostly handled in firmware. If the
233 directory exists, it will have an attribute file for every VDO
234 in Discover Identity command result.
236 What: /sys/class/typec/<port>-partner/usb_mode
238 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
239 Description: The USB Modes that the partner device supports. The active mode
240 is displayed in brackets. The active USB mode can be changed by
241 writing to this file when the port driver is able to send Data
242 Reset Message to the partner. That requires USB Power Delivery
243 contract between the partner and the port.
250 USB Type-C cable devices (eg. /sys/class/typec/port0-cable/)
252 Note: Electronically Marked Cables will have a device also for one cable plug
253 (eg. /sys/class/typec/port0-plug0). If the cable is active and has also SOP
254 Double Prime controller (USB Power Deliver specification ch. 2.4) it will have
255 second device also for the other plug. Both plugs may have alternate modes as
256 described in USB Type-C and USB Power Delivery specifications.
258 What: /sys/class/typec/<port>-cable/type
260 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
261 Description: USB Power Delivery Specification defines a set of product types
262 for the cables. This file will show the product type of the
263 cable if it is known. If the product type of the cable is not
264 visible to the device driver, this file will not exist.
266 When the cable product type is detected, uvevent is also raised
267 with PRODUCT_TYPE showing the product type of the cable.
271 ====================== ==========================
274 passive Passive Cable
275 ====================== ==========================
277 What: /sys/class/typec/<port>-cable/plug_type
279 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
281 Shows type of the plug on the cable:
283 - type-a - Standard A
284 - type-b - Standard B
288 What: /sys/class/typec/<port>-<plug>/number_of_alternate_modes
290 Contact: Prashant Malani <pmalani@chromium.org>
292 Shows the number of alternate modes which are advertised by the plug
293 associated with a particular cable during Power Delivery discovery.
294 This file remains hidden until a value greater than or equal to 0
295 is set by Type C port driver.
298 USB Type-C partner/cable Power Delivery Identity objects
300 NOTE: The following attributes will be applicable to both
301 partner (e.g /sys/class/typec/port0-partner/) and
302 cable (e.g /sys/class/typec/port0-cable/) devices. Consequently, the example file
303 paths below are prefixed with "/sys/class/typec/<port>-{partner|cable}/" to
306 What: /sys/class/typec/<port>-{partner|cable}/identity/
308 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
310 This directory appears only if the port device driver is capable
311 of showing the result of Discover Identity USB power delivery
312 command. That will not always be possible even when USB power
313 delivery is supported, for example when USB power delivery
314 communication for the port is mostly handled in firmware. If the
315 directory exists, it will have an attribute file for every VDO
316 in Discover Identity command result.
318 What: /sys/class/typec/<port>-{partner|cable}/identity/id_header
320 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
322 ID Header VDO part of Discover Identity command result. The
323 value will show 0 until Discover Identity command result becomes
324 available. The value can be polled.
326 What: /sys/class/typec/<port>-{partner|cable}/identity/cert_stat
328 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
330 Cert Stat VDO part of Discover Identity command result. The
331 value will show 0 until Discover Identity command result becomes
332 available. The value can be polled.
334 What: /sys/class/typec/<port>-{partner|cable}/identity/product
336 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
338 Product VDO part of Discover Identity command result. The value
339 will show 0 until Discover Identity command result becomes
340 available. The value can be polled.
342 What: /sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo1
344 Contact: Prashant Malani <pmalani@chromium.org>
346 1st Product Type VDO of Discover Identity command result.
347 The value will show 0 until Discover Identity command result becomes
348 available and a valid Product Type VDO is returned.
350 What: /sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo2
352 Contact: Prashant Malani <pmalani@chromium.org>
354 2nd Product Type VDO of Discover Identity command result.
355 The value will show 0 until Discover Identity command result becomes
356 available and a valid Product Type VDO is returned.
358 What: /sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo3
360 Contact: Prashant Malani <pmalani@chromium.org>
362 3rd Product Type VDO of Discover Identity command result.
363 The value will show 0 until Discover Identity command result becomes
364 available and a valid Product Type VDO is returned.
367 USB Type-C port alternate mode devices.
369 What: /sys/class/typec/<port>/<alt mode>/supported_roles
371 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
373 Space separated list of the supported roles.
375 Valid values: source, sink