1ce21bfe6SPratyush AnandLink Layer Validation Device is a standard device for testing of Super 2ce21bfe6SPratyush AnandSpeed Link Layer tests. These nodes are available in sysfs only when lvs 3ce21bfe6SPratyush Ananddriver is bound with root hub device. 4ce21bfe6SPratyush Anand 5ce21bfe6SPratyush AnandWhat: /sys/bus/usb/devices/.../get_dev_desc 6ce21bfe6SPratyush AnandDate: March 2014 7e34caddeSPratyush AnandContact: Pratyush Anand <pratyush.anand@gmail.com> 8ce21bfe6SPratyush AnandDescription: 9ce21bfe6SPratyush Anand Write to this node to issue "Get Device Descriptor" 10ce21bfe6SPratyush Anand for Link Layer Validation device. It is needed for TD.7.06. 11ce21bfe6SPratyush Anand 12ce21bfe6SPratyush AnandWhat: /sys/bus/usb/devices/.../u1_timeout 13ce21bfe6SPratyush AnandDate: March 2014 14e34caddeSPratyush AnandContact: Pratyush Anand <pratyush.anand@gmail.com> 15ce21bfe6SPratyush AnandDescription: 16ce21bfe6SPratyush Anand Set "U1 timeout" for the downstream port where Link Layer 17ce21bfe6SPratyush Anand Validation device is connected. Timeout value must be between 0 18ce21bfe6SPratyush Anand and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21. 19ce21bfe6SPratyush Anand 20ce21bfe6SPratyush AnandWhat: /sys/bus/usb/devices/.../u2_timeout 21ce21bfe6SPratyush AnandDate: March 2014 22e34caddeSPratyush AnandContact: Pratyush Anand <pratyush.anand@gmail.com> 23ce21bfe6SPratyush AnandDescription: 24ce21bfe6SPratyush Anand Set "U2 timeout" for the downstream port where Link Layer 25ce21bfe6SPratyush Anand Validation device is connected. Timeout value must be between 0 26ce21bfe6SPratyush Anand and 127. It is needed for TD.7.18, TD.7.19, TD.7.20 and TD.7.21. 27ce21bfe6SPratyush Anand 28ce21bfe6SPratyush AnandWhat: /sys/bus/usb/devices/.../hot_reset 29ce21bfe6SPratyush AnandDate: March 2014 30e34caddeSPratyush AnandContact: Pratyush Anand <pratyush.anand@gmail.com> 31ce21bfe6SPratyush AnandDescription: 32ce21bfe6SPratyush Anand Write to this node to issue "Reset" for Link Layer Validation 33ce21bfe6SPratyush Anand device. It is needed for TD.7.29, TD.7.31, TD.7.34 and TD.7.35. 34ce21bfe6SPratyush Anand 35ce21bfe6SPratyush AnandWhat: /sys/bus/usb/devices/.../u3_entry 36ce21bfe6SPratyush AnandDate: March 2014 37e34caddeSPratyush AnandContact: Pratyush Anand <pratyush.anand@gmail.com> 38ce21bfe6SPratyush AnandDescription: 39ce21bfe6SPratyush Anand Write to this node to issue "U3 entry" for Link Layer 40ce21bfe6SPratyush Anand Validation device. It is needed for TD.7.35 and TD.7.36. 41ce21bfe6SPratyush Anand 42ce21bfe6SPratyush AnandWhat: /sys/bus/usb/devices/.../u3_exit 43ce21bfe6SPratyush AnandDate: March 2014 44e34caddeSPratyush AnandContact: Pratyush Anand <pratyush.anand@gmail.com> 45ce21bfe6SPratyush AnandDescription: 46ce21bfe6SPratyush Anand Write to this node to issue "U3 exit" for Link Layer 47ce21bfe6SPratyush Anand Validation device. It is needed for TD.7.36. 48*f624ec70SJack Pham 49*f624ec70SJack PhamWhat: /sys/bus/usb/devices/.../enable_compliance 50*f624ec70SJack PhamDate: July 2017 51*f624ec70SJack PhamDescription: 52*f624ec70SJack Pham Write to this node to set the port to compliance mode to test 53*f624ec70SJack Pham with Link Layer Validation device. It is needed for TD.7.34. 54*f624ec70SJack Pham 55*f624ec70SJack PhamWhat: /sys/bus/usb/devices/.../warm_reset 56*f624ec70SJack PhamDate: July 2017 57*f624ec70SJack PhamDescription: 58*f624ec70SJack Pham Write to this node to issue "Warm Reset" for Link Layer Validation 59*f624ec70SJack Pham device. It may be needed to properly reset an xHCI 1.1 host port if 60*f624ec70SJack Pham compliance mode needed to be explicitly enabled. 61