Documentation/ABI/testing/sysfs-bus-usb-lvstest

   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.
   4
   5 What:           /sys/bus/usb/devices/.../get_dev_desc
   6 Date:           March 2014
   7 Contact:        Pratyush Anand <pratyush.anand@gmail.com>
   8 Description:
   9                 Write to this node to issue "Get Device Descriptor"
  10                 for Link Layer Validation device. It is needed for TD.7.06.
  11
  12 What:           /sys/bus/usb/devices/.../u1_timeout
  13 Date:           March 2014
  14 Contact:        Pratyush Anand <pratyush.anand@gmail.com>
  15 Description:
  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.
  19
  20 What:           /sys/bus/usb/devices/.../u2_timeout
  21 Date:           March 2014
  22 Contact:        Pratyush Anand <pratyush.anand@gmail.com>
  23 Description:
  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.
  27
  28 What:           /sys/bus/usb/devices/.../hot_reset
  29 Date:           March 2014
  30 Contact:        Pratyush Anand <pratyush.anand@gmail.com>
  31 Description:
  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.
  34
  35 What:           /sys/bus/usb/devices/.../u3_entry
  36 Date:           March 2014
  37 Contact:        Pratyush Anand <pratyush.anand@gmail.com>
  38 Description:
  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.
  41
  42 What:           /sys/bus/usb/devices/.../u3_exit
  43 Date:           March 2014
  44 Contact:        Pratyush Anand <pratyush.anand@gmail.com>
  45 Description:
  46                 Write to this node to issue "U3 exit" for Link Layer
  47                 Validation device. It is needed for TD.7.36.