1*4882a593SmuzhiyunLink Layer Validation Device is a standard device for testing of Super 2*4882a593SmuzhiyunSpeed Link Layer tests. These nodes are available in sysfs only when lvs 3*4882a593Smuzhiyundriver is bound with root hub device. 4*4882a593Smuzhiyun 5*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../get_dev_desc 6*4882a593SmuzhiyunDate: March 2014 7*4882a593SmuzhiyunContact: Pratyush Anand <pratyush.anand@gmail.com> 8*4882a593SmuzhiyunDescription: 9*4882a593Smuzhiyun Write to this node to issue "Get Device Descriptor" 10*4882a593Smuzhiyun for Link Layer Validation device. It is needed for TD.7.06. 11*4882a593Smuzhiyun 12*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../u1_timeout 13*4882a593SmuzhiyunDate: March 2014 14*4882a593SmuzhiyunContact: Pratyush Anand <pratyush.anand@gmail.com> 15*4882a593SmuzhiyunDescription: 16*4882a593Smuzhiyun Set "U1 timeout" for the downstream port where Link Layer 17*4882a593Smuzhiyun Validation device is connected. Timeout value must be between 0 18*4882a593Smuzhiyun and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21. 19*4882a593Smuzhiyun 20*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../u2_timeout 21*4882a593SmuzhiyunDate: March 2014 22*4882a593SmuzhiyunContact: Pratyush Anand <pratyush.anand@gmail.com> 23*4882a593SmuzhiyunDescription: 24*4882a593Smuzhiyun Set "U2 timeout" for the downstream port where Link Layer 25*4882a593Smuzhiyun Validation device is connected. Timeout value must be between 0 26*4882a593Smuzhiyun and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21. 27*4882a593Smuzhiyun 28*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../hot_reset 29*4882a593SmuzhiyunDate: March 2014 30*4882a593SmuzhiyunContact: Pratyush Anand <pratyush.anand@gmail.com> 31*4882a593SmuzhiyunDescription: 32*4882a593Smuzhiyun Write to this node to issue "Reset" for Link Layer Validation 33*4882a593Smuzhiyun device. It is needed for TD.7.29, TD.7.31, TD.7.34 and TD.7.35. 34*4882a593Smuzhiyun 35*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../u3_entry 36*4882a593SmuzhiyunDate: March 2014 37*4882a593SmuzhiyunContact: Pratyush Anand <pratyush.anand@gmail.com> 38*4882a593SmuzhiyunDescription: 39*4882a593Smuzhiyun Write to this node to issue "U3 entry" for Link Layer 40*4882a593Smuzhiyun Validation device. It is needed for TD.7.35 and TD.7.36. 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../u3_exit 43*4882a593SmuzhiyunDate: March 2014 44*4882a593SmuzhiyunContact: Pratyush Anand <pratyush.anand@gmail.com> 45*4882a593SmuzhiyunDescription: 46*4882a593Smuzhiyun Write to this node to issue "U3 exit" for Link Layer 47*4882a593Smuzhiyun Validation device. It is needed for TD.7.36. 48*4882a593Smuzhiyun 49*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../enable_compliance 50*4882a593SmuzhiyunDate: July 2017 51*4882a593SmuzhiyunDescription: 52*4882a593Smuzhiyun Write to this node to set the port to compliance mode to test 53*4882a593Smuzhiyun with Link Layer Validation device. It is needed for TD.7.34. 54*4882a593Smuzhiyun 55*4882a593SmuzhiyunWhat: /sys/bus/usb/devices/.../warm_reset 56*4882a593SmuzhiyunDate: July 2017 57*4882a593SmuzhiyunDescription: 58*4882a593Smuzhiyun Write to this node to issue "Warm Reset" for Link Layer Validation 59*4882a593Smuzhiyun device. It may be needed to properly reset an xHCI 1.1 host port if 60*4882a593Smuzhiyun compliance mode needed to be explicitly enabled. 61