sysfs-bus-usb-lvstest 2.2 KB

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  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. What: /sys/bus/usb/devices/.../get_dev_desc
  5. Date: March 2014
  6. Contact: Pratyush Anand <pratyush.anand@gmail.com>
  7. Description:
  8. Write to this node to issue "Get Device Descriptor"
  9. for Link Layer Validation device. It is needed for TD.7.06.
  10. What: /sys/bus/usb/devices/.../u1_timeout
  11. Date: March 2014
  12. Contact: Pratyush Anand <pratyush.anand@gmail.com>
  13. Description:
  14. Set "U1 timeout" for the downstream port where Link Layer
  15. Validation device is connected. Timeout value must be between 0
  16. and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
  17. What: /sys/bus/usb/devices/.../u2_timeout
  18. Date: March 2014
  19. Contact: Pratyush Anand <pratyush.anand@gmail.com>
  20. Description:
  21. Set "U2 timeout" for the downstream port where Link Layer
  22. Validation device is connected. Timeout value must be between 0
  23. and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21.
  24. What: /sys/bus/usb/devices/.../hot_reset
  25. Date: March 2014
  26. Contact: Pratyush Anand <pratyush.anand@gmail.com>
  27. Description:
  28. Write to this node to issue "Reset" for Link Layer Validation
  29. device. It is needed for TD.7.29, TD.7.31, TD.7.34 and TD.7.35.
  30. What: /sys/bus/usb/devices/.../u3_entry
  31. Date: March 2014
  32. Contact: Pratyush Anand <pratyush.anand@gmail.com>
  33. Description:
  34. Write to this node to issue "U3 entry" for Link Layer
  35. Validation device. It is needed for TD.7.35 and TD.7.36.
  36. What: /sys/bus/usb/devices/.../u3_exit
  37. Date: March 2014
  38. Contact: Pratyush Anand <pratyush.anand@gmail.com>
  39. Description:
  40. Write to this node to issue "U3 exit" for Link Layer
  41. Validation device. It is needed for TD.7.36.
  42. What: /sys/bus/usb/devices/.../enable_compliance
  43. Date: July 2017
  44. Description:
  45. Write to this node to set the port to compliance mode to test
  46. with Link Layer Validation device. It is needed for TD.7.34.
  47. What: /sys/bus/usb/devices/.../warm_reset
  48. Date: July 2017
  49. Description:
  50. Write to this node to issue "Warm Reset" for Link Layer Validation
  51. device. It may be needed to properly reset an xHCI 1.1 host port if
  52. compliance mode needed to be explicitly enabled.