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 when USB Power Delivery is not supported.
110 What: /sys/class/typec/<port>/usb_typec_revision
112 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
114 Revision number of the supported USB Type-C specification.
116 What: /sys/class/typec/<port>/orientation
118 Contact: Badhri Jagan Sridharan <badhri@google.com>
120 Indicates the active orientation of the Type-C connector.
122 - "normal": CC1 orientation
123 - "reverse": CC2 orientation
124 - "unknown": Orientation cannot be determined.
126 USB Type-C partner devices (eg. /sys/class/typec/port0-partner/)
128 What: /sys/class/typec/<port>-partner/accessory_mode
130 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
132 Shows the Accessory Mode name when the partner is an Accessory.
133 The Accessory Modes are defined in USB Type-C Specification.
135 What: /sys/class/typec/<port>-partner/supports_usb_power_delivery
137 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
139 Shows if the partner supports USB Power Delivery communication:
140 Valid values: yes, no
142 What: /sys/class/typec/<port>-partner/number_of_alternate_modes
144 Contact: Prashant Malani <pmalani@chromium.org>
146 Shows the number of alternate modes which are advertised by the partner
147 during Power Delivery discovery. This file remains hidden until a value
148 greater than or equal to 0 is set by Type C port driver.
150 What: /sys/class/typec/<port>-partner/type
152 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
153 Description: USB Power Delivery Specification defines a set of product types
154 for the partner devices. This file will show the product type of
155 the partner if it is known. Dual-role capable partners will have
156 both UFP and DFP product types defined, but only one that
157 matches the current role will be active at the time. If the
158 product type of the partner is not visible to the device driver,
159 this file will not exist.
161 When the partner product type is detected, or changed with role
162 swap, uvevent is also raised that contains PRODUCT_TYPE=<product
163 type> (for example PRODUCT_TYPE=hub).
168 ====================== ==========================
171 peripheral PDUSB Peripheral
173 ama Alternate Mode Adapter
174 ====================== ==========================
177 ====================== ==========================
181 power_brick Power Brick
182 amc Alternate Mode Controller
183 ====================== ==========================
185 What: /sys/class/typec/<port>-partner>/identity/
187 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
189 This directory appears only if the port device driver is capable
190 of showing the result of Discover Identity USB power delivery
191 command. That will not always be possible even when USB power
192 delivery is supported, for example when USB power delivery
193 communication for the port is mostly handled in firmware. If the
194 directory exists, it will have an attribute file for every VDO
195 in Discover Identity command result.
197 USB Type-C cable devices (eg. /sys/class/typec/port0-cable/)
199 Note: Electronically Marked Cables will have a device also for one cable plug
200 (eg. /sys/class/typec/port0-plug0). If the cable is active and has also SOP
201 Double Prime controller (USB Power Deliver specification ch. 2.4) it will have
202 second device also for the other plug. Both plugs may have alternate modes as
203 described in USB Type-C and USB Power Delivery specifications.
205 What: /sys/class/typec/<port>-cable/type
207 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
208 Description: USB Power Delivery Specification defines a set of product types
209 for the cables. This file will show the product type of the
210 cable if it is known. If the product type of the cable is not
211 visible to the device driver, this file will not exist.
213 When the cable product type is detected, uvevent is also raised
214 with PRODUCT_TYPE showing the product type of the cable.
218 ====================== ==========================
221 passive Passive Cable
222 ====================== ==========================
224 What: /sys/class/typec/<port>-cable/plug_type
226 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
228 Shows type of the plug on the cable:
230 - type-a - Standard A
231 - type-b - Standard B
235 What: /sys/class/typec/<port>-<plug>/number_of_alternate_modes
237 Contact: Prashant Malani <pmalani@chromium.org>
239 Shows the number of alternate modes which are advertised by the plug
240 associated with a particular cable during Power Delivery discovery.
241 This file remains hidden until a value greater than or equal to 0
242 is set by Type C port driver.
245 USB Type-C partner/cable Power Delivery Identity objects
247 NOTE: The following attributes will be applicable to both
248 partner (e.g /sys/class/typec/port0-partner/) and
249 cable (e.g /sys/class/typec/port0-cable/) devices. Consequently, the example file
250 paths below are prefixed with "/sys/class/typec/<port>-{partner|cable}/" to
253 What: /sys/class/typec/<port>-{partner|cable}/identity/
255 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
257 This directory appears only if the port device driver is capable
258 of showing the result of Discover Identity USB power delivery
259 command. That will not always be possible even when USB power
260 delivery is supported, for example when USB power delivery
261 communication for the port is mostly handled in firmware. If the
262 directory exists, it will have an attribute file for every VDO
263 in Discover Identity command result.
265 What: /sys/class/typec/<port>-{partner|cable}/identity/id_header
267 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
269 ID Header VDO part of Discover Identity command result. The
270 value will show 0 until Discover Identity command result becomes
271 available. The value can be polled.
273 What: /sys/class/typec/<port>-{partner|cable}/identity/cert_stat
275 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
277 Cert Stat VDO part of Discover Identity command result. The
278 value will show 0 until Discover Identity command result becomes
279 available. The value can be polled.
281 What: /sys/class/typec/<port>-{partner|cable}/identity/product
283 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
285 Product VDO part of Discover Identity command result. The value
286 will show 0 until Discover Identity command result becomes
287 available. The value can be polled.
289 What: /sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo1
291 Contact: Prashant Malani <pmalani@chromium.org>
293 1st Product Type VDO of Discover Identity command result.
294 The value will show 0 until Discover Identity command result becomes
295 available and a valid Product Type VDO is returned.
297 What: /sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo2
299 Contact: Prashant Malani <pmalani@chromium.org>
301 2nd Product Type VDO of Discover Identity command result.
302 The value will show 0 until Discover Identity command result becomes
303 available and a valid Product Type VDO is returned.
305 What: /sys/class/typec/<port>-{partner|cable}/identity/product_type_vdo3
307 Contact: Prashant Malani <pmalani@chromium.org>
309 3rd Product Type VDO of Discover Identity command result.
310 The value will show 0 until Discover Identity command result becomes
311 available and a valid Product Type VDO is returned.
314 USB Type-C port alternate mode devices.
316 What: /sys/class/typec/<port>/<alt mode>/supported_roles
318 Contact: Heikki Krogerus <heikki.krogerus@linux.intel.com>
320 Space separated list of the supported roles.
322 Valid values: source, sink