The usba module provides debugging support for the platform-independent Universal Serial Bus (USB) framework.
Given the address of a usba_device structure, print summary information. If no address is supplied, this dcmd walks the global list of usba_device structures. If the -p option is present, also list information for all open pipes on this device. If the -v option is present, list verbose information for each device.
Given the address of a usba_list_entry structure, iterate over the chain of such structures.
Walk the global list of usba_device_t structures.
Given a usba_device_t address, walk USB pipe handles.