lsusb
Bus 005 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 004 Device 002: ID 046d:08f0 Logitech, Inc. QuickCam Messenger
Bus 004 Device 003: ID 045e:0084 Microsoft Corp.
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000