sysfs-bus-usb - OpenGrok cross reference for /linux-6.8/Documentation/ABI/testing/sysfs-bus-usb

1 What:		/sys/bus/usb/devices/<INTERFACE>/authorized
9 		by writing INTERFACE to /sys/bus/usb/drivers_probe
10 		This allows to avoid side-effects with drivers
15 What:		/sys/bus/usb/devices/usbX/interface_authorized_default
22 What:		/sys/bus/usb/device/.../authorized
28 		drivers, non-authorized one are not.  By default, wired
31 What:		/sys/bus/usb/drivers/.../new_id
33 Contact:	linux-usb@vger.kernel.org
48 		  # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id
53 		  # echo "0458 7045 0 0458 704c" > /sys/bus/usb/drivers/foo/new_id
59 		  # cat /sys/bus/usb/drivers/foo/new_id
67 What:		/sys/bus/usb-serial/drivers/.../new_id
69 Contact:	linux-usb@vger.kernel.org
72 		extra bus folder "usb-serial" in sysfs; apart from that
74 		"/sys/bus/usb/drivers/.../new_id" apply.
76 What:		/sys/bus/usb/drivers/.../remove_id
87 		# echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id
91 		"/sys/bus/usb/drivers/.../new_id"
93 What:		/sys/bus/usb/devices/.../power/usb2_hardware_lpm
97 		If CONFIG_PM is set and a USB 2.0 lpm-capable device is plugged
102 		power/usb2_hardware_lpm.  The file holds a string value (enable
107 What:		/sys/bus/usb/devices/.../power/usb3_hardware_lpm_u1
108 		/sys/bus/usb/devices/.../power/usb3_hardware_lpm_u2
113 		If CONFIG_PM is set and a USB 3.0 lpm-capable device is plugged
119 		power/usb3_hardware_lpm_u1 and power/usb3_hardware_lpm_u2. These
123 What:		/sys/bus/usb/devices/.../ltm_capable
135 What:		/sys/bus/usb/devices/<INTERFACE>/wireless_status
141 		attribute allows user-space to know whether the device is
145 		an on-screen keyboard if the only wireless keyboard is
148 		statuses available in WWAN, WLAN/Wi-Fi, Bluetooth, etc.
152 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>
156 		The /sys/bus/usb/devices/.../<hub_interface>/port<X>
159 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/connect_type
168 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/location
178 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/quirks
182 		In some cases, we care about time-to-active for devices
183 		connected on a specific port (e.g. non-standard USB port like
186 		This attribute is a bit-field that controls the behavior of
189 		 - Bit 0 of this field selects the "old" enumeration scheme,
197 		 - Bit 1 reduces TRSTRCY to the 10 ms that are required by the
202 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/over_current_count
206 		Most hubs are able to detect over-current situations on their
208 		the number of over-current situation occurred on a specific port
216 		  OVER_CURRENT_PORT=/sys/bus/usb/devices/.../<hub_interface>/port<X>
219 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/usb3_lpm_permit
230 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/connector
234 		Link to the USB Type-C connector when available. This link is
235 		only created when USB Type-C Connector Class is enabled, and
239 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/disable
244 		Vbus power output (but only on hubs that support
245 		power switching -- most hubs don't support it). If
250 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/early_stop
261 What:		/sys/bus/usb/devices/.../<hub_interface>/port<X>/state
266 		Valid states are: 'not-attached', 'attached', 'powered',
271 What:		/sys/bus/usb/devices/.../power/usb2_lpm_l1_timeout
275 		USB 2.0 devices may support hardware link power management (LPM)
279 		Useful for power management tuning.
280 		Supported values are 0 - 65535 microseconds.
282 What:		/sys/bus/usb/devices/.../power/usb2_lpm_besl
286 		USB 2.0 devices that support hardware link power management (LPM)
292 		value in order to tune power saving and service latency.
294 		Supported values are 0 - 15.
296 		USB 2.0 ECN Errata for Link Power Management, section 4.10)
298 What:		/sys/bus/usb/devices/.../rx_lanes
303 		USB 3.2 adds Dual-lane support, 2 rx and 2 tx lanes over Type-C.
304 		Inter-Chip SSIC devices support asymmetric lanes up to 4 lanes per
307 What:		/sys/bus/usb/devices/.../tx_lanes
312 		USB 3.2 adds Dual-lane support, 2 rx and 2 tx -lanes over Type-C.
313 		Inter-Chip SSIC devices support asymmetric lanes up to 4 lanes per
316 What:		/sys/bus/usb/devices/.../typec
320 		Symlink to the USB Type-C partner device. USB Type-C partner
322 		Configuration Channel (CC signal on USB Type-C connectors and
325 What:		/sys/bus/usb/devices/usbX/bAlternateSetting
331 What:		/sys/bus/usb/devices/usbX/bcdDevice
337 What:		/sys/bus/usb/devices/usbX/bConfigurationValue
349 			/sys/bus/usb/devices/usbX/bNumConfigurations
353 What:		/sys/bus/usb/devices/usbX/bDeviceClass
359 What:		/sys/bus/usb/devices/usbX/bDeviceProtocol
365 What:		/sys/bus/usb/devices/usbX/bDeviceSubClass
371 What:		/sys/bus/usb/devices/usbX/bInterfaceClass
377 What:		/sys/bus/usb/devices/usbX/bInterfaceNumber
383 What:		/sys/bus/usb/devices/usbX/bInterfaceProtocol
389 What:		/sys/bus/usb/devices/usbX/bInterfaceSubClass
395 What:		/sys/bus/usb/devices/usbX/bmAttributes
401 What:		/sys/bus/usb/devices/usbX/bMaxPacketSize0
407 What:		/sys/bus/usb/devices/usbX/bMaxPower
409 		Maximum power consumption of the active configuration of
412 What:		/sys/bus/usb/devices/usbX/bNumConfigurations
417 			/sys/bus/usb/devices/usbX/bConfigurationValue
421 What:		/sys/bus/usb/devices/usbX/bNumEndpoints
427 What:		/sys/bus/usb/devices/usbX/bNumInterfaces
431 What:		/sys/bus/usb/devices/usbX/busnum
433 		Number of the bus.
435 What:		/sys/bus/usb/devices/usbX/configuration
441 What:		/sys/bus/usb/devices/usbX/descriptors
445 What:		/sys/bus/usb/devices/usbX/idProduct
449 What:		/sys/bus/usb/devices/usbX/idVendor
453 What:		/sys/bus/usb/devices/usbX/devspec
457 What:		/sys/bus/usb/devices/usbX/avoid_reset_quirk
466 What:		/sys/bus/usb/devices/usbX/devnum
470 What:		/sys/bus/usb/devices/usbX/devpath
474 What:		/sys/bus/usb/devices/usbX/manufacturer
479 What:		/sys/bus/usb/devices/usbX/maxchild
483 What:		/sys/bus/usb/devices/usbX/persist
487 What:		/sys/bus/usb/devices/usbX/product
492 What:		/sys/bus/usb/devices/usbX/speed
508 What:		/sys/bus/usb/devices/usbX/supports_autosuspend
513 What:		/sys/bus/usb/devices/usbX/urbnum
517 What:		/sys/bus/usb/devices/usbX/version
522 What:		/sys/bus/usb/devices/usbX/power/autosuspend
529 What:		/sys/bus/usb/devices/usbX/power/active_duration
533 What:		/sys/bus/usb/devices/usbX/power/connected_duration
537 What:		/sys/bus/usb/devices/usbX/power/level
540 What:		/sys/bus/usb/devices/usbX/ep_<N>/bEndpointAddress
546 			/sys/bus/usb/devices/usbX/ep_<N>/direction
550 What:		/sys/bus/usb/devices/usbX/ep_<N>/bInterval
555 		/sys/bus/usb/devices/usbX/ep_<N>/interval.
557 What:		/sys/bus/usb/devices/usbX/ep_<N>/bLength
561 What:		/sys/bus/usb/devices/usbX/ep_<N>/bmAttributes
567 			/sys/bus/usb/devices/usbX/ep_<N>/type
571 What:		/sys/bus/usb/devices/usbX/ep_<N>/direction
575 		    - both (on control endpoints)
576 		    - in
577 		    - out
579 What:		/sys/bus/usb/devices/usbX/ep_<N>/interval
584 What:		/sys/bus/usb/devices/usbX/ep_<N>/type
588 		    - Control
589 		    - Isoc
590 		    - Bulk
591 		    - Interrupt
592 		    - unknown
594 What:		/sys/bus/usb/devices/usbX/ep_<N>/wMaxPacketSize