/var/log/message

ums0: Cypress Arvel COMBO Optical Mereveille Mouse, rev 1.10/0.00,
addr 2, iclass 3/1
ums0: 3 buttons and Z dir.

usbdevs -v ¤Î·ë²Ì

Controller /dev/usb0:
addr 1: self powered, config 1, UHCI root hub(0x0000), Intel(0x0000), rev 1.00
 port 1 addr 2: low speed, power 100 mA, config 1, Arvel COMBO Optical
Mereveille Mouse(0x6370), Cypress(0x04b4), rev 0.00
 port 2 powered