1 Link Layer Validation Device is a standard device for testing of Super
2 Speed Link Layer tests. These nodes are available in sysfs only when lvs
3 driver is bound with root hub device.
5 What: /sys/bus/usb/devices/.../get_dev_desc
7 Contact: Pratyush Anand <pratyush.anand@gmail.com>
9 Write to this node to issue "Get Device Descriptor"
10 for Link Layer Validation device. It is needed for TD.7.06.
12 What: /sys/bus/usb/devices/.../u1_timeout
14 Contact: Pratyush Anand <pratyush.anand@gmail.com>
16 Set "U1 timeout" for the downstream port where Link Layer
17 Validation device is connected. Timeout value must be between 0
18 and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
20 What: /sys/bus/usb/devices/.../u2_timeout
22 Contact: Pratyush Anand <pratyush.anand@gmail.com>
24 Set "U2 timeout" for the downstream port where Link Layer
25 Validation device is connected. Timeout value must be between 0
26 and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
28 What: /sys/bus/usb/devices/.../hot_reset
30 Contact: Pratyush Anand <pratyush.anand@gmail.com>
32 Write to this node to issue "Reset" for Link Layer Validation
33 device. It is needed for TD.7.29, TD.7.31, TD.7.34 and TD.7.35.
35 What: /sys/bus/usb/devices/.../u3_entry
37 Contact: Pratyush Anand <pratyush.anand@gmail.com>
39 Write to this node to issue "U3 entry" for Link Layer
40 Validation device. It is needed for TD.7.35 and TD.7.36.
42 What: /sys/bus/usb/devices/.../u3_exit
44 Contact: Pratyush Anand <pratyush.anand@gmail.com>
46 Write to this node to issue "U3 exit" for Link Layer
47 Validation device. It is needed for TD.7.36.