0001 Link Layer Validation Device is a standard device for testing of Super
0002 Speed Link Layer tests. These nodes are available in sysfs only when lvs
0003 driver is bound with root hub device.
0004
0005 What: /sys/bus/usb/devices/.../get_dev_desc
0006 Date: March 2014
0007 Contact: Pratyush Anand <pratyush.anand@gmail.com>
0008 Description:
0009 Write to this node to issue "Get Device Descriptor"
0010 for Link Layer Validation device. It is needed for TD.7.06.
0011
0012 What: /sys/bus/usb/devices/.../u1_timeout
0013 Date: March 2014
0014 Contact: Pratyush Anand <pratyush.anand@gmail.com>
0015 Description:
0016 Set "U1 timeout" for the downstream port where Link Layer
0017 Validation device is connected. Timeout value must be between 0
0018 and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
0019
0020 What: /sys/bus/usb/devices/.../u2_timeout
0021 Date: March 2014
0022 Contact: Pratyush Anand <pratyush.anand@gmail.com>
0023 Description:
0024 Set "U2 timeout" for the downstream port where Link Layer
0025 Validation device is connected. Timeout value must be between 0
0026 and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
0027
0028 What: /sys/bus/usb/devices/.../hot_reset
0029 Date: March 2014
0030 Contact: Pratyush Anand <pratyush.anand@gmail.com>
0031 Description:
0032 Write to this node to issue "Reset" for Link Layer Validation
0033 device. It is needed for TD.7.29, TD.7.31, TD.7.34 and TD.7.35.
0034
0035 What: /sys/bus/usb/devices/.../u3_entry
0036 Date: March 2014
0037 Contact: Pratyush Anand <pratyush.anand@gmail.com>
0038 Description:
0039 Write to this node to issue "U3 entry" for Link Layer
0040 Validation device. It is needed for TD.7.35 and TD.7.36.
0041
0042 What: /sys/bus/usb/devices/.../u3_exit
0043 Date: March 2014
0044 Contact: Pratyush Anand <pratyush.anand@gmail.com>
0045 Description:
0046 Write to this node to issue "U3 exit" for Link Layer
0047 Validation device. It is needed for TD.7.36.
0048
0049 What: /sys/bus/usb/devices/.../enable_compliance
0050 Date: July 2017
0051 Description:
0052 Write to this node to set the port to compliance mode to test
0053 with Link Layer Validation device. It is needed for TD.7.34.
0054
0055 What: /sys/bus/usb/devices/.../warm_reset
0056 Date: July 2017
0057 Description:
0058 Write to this node to issue "Warm Reset" for Link Layer Validation
0059 device. It may be needed to properly reset an xHCI 1.1 host port if
0060 compliance mode needed to be explicitly enabled.
