The usb command displays information extracted from UEFI USB protocols for USB root hubs, ports, and devices.
udiag usb { hubs | <hub_id> | device | <device_id> }
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BSP_ONLY; ONE_INSTANCE_ONLY
To list USB controllers, type:
fs0:/> udiag usb hubs
To display information for the second USB hub in the list, type:
fs0:/> udiag usb h1
To list active USB devices, type:
fs0:/> udiag usb devices
To display information for the fourth device in the list, type:
fs0:/> udiag usb d3