[root@moza1 sbin]#  dmesg | grep USB
drivers/usb/input/hid-core.c: v2.01:USB HID core driver
PCI0 USB0 USB1 USB2 USB3 USB4 USB5 USB6 LAN0 AC97 UAR1
ehci_hcd 0000:00:10.3: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:10.3: USB 2.0 initialized, EHCI 1.00, driver 10 Dec 2004
hub 1-0:1.0: USB hub found
USB Universal Host Controller Interface driver v2.2
uhci_hcd 0000:00:10.0: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
uhci_hcd 0000:00:10.1: new USB bus registered, assigned bus number 3
hub 3-0:1.0: USB hub found
uhci_hcd 0000:00:10.2: new USB bus registered, assigned bus number 4
hub 4-0:1.0: USB hub found