dmesg |grep -i usb
usbcore: registered new driver usbfs
usbcore: registered new driver hub
usbcore: registered new driver hiddev
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.0:USB HID core driver
PCI0 PCI1 PS2K PS2M USB0 USB3 USB1 USB2 AC97
ehci_hcd 0000:00:03.3: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:03.3: USB 2.0 enabled, EHCI 1.00, driver 2004-May-10
hub 1-0:1.0: USB hub found
ohci_hcd: 2004 Feb 02 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI)
ohci_hcd 0000:00:03.0: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
ohci_hcd 0000:00:03.1: new USB bus registered, assigned bus number 3
hub 3-0:1.0: USB hub found
usb 1-2: new high speed USB device using address 2
Initializing USB Mass Storage driver...
scsi0 : SCSI emulation for USB Mass Storage devices
USB Mass Storage device found at 2
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb 1-2: USB disconnect, address 2
usb 1-1: new high speed USB device using address 3
scsi1 : SCSI emulation for USB Mass Storage devices
USB Mass Storage device found at 3