lsusb:
us 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020
Bus 001 Device 003: ID 05ca:18b5 Ricoh Co., Ltd
Bus 001 Device 004: ID 0489:e00f Foxconn / Hon Hai
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 8087:0020
Bus 002 Device 003: ID 046d:c52b Logitech, Inc.
lsusb -t:
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/2p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/8p, 480M
|__ Port 5: Dev 3, If 0, Class=HID, Driver=usbhid, 12M
|__ Port 5: Dev 3, If 1, Class=HID, Driver=usbhid, 12M
|__ Port 5: Dev 3, If 2, Class=HID, Driver=usbhid, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/2p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M
|__ Port 2: Dev 3, If 0, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M
|__ Port 2: Dev 3, If 1, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M
|__ Port 6: Dev 4, If 0, Class='bInterfaceClass 0xe0 not yet handled', Driver=btusb, 12M
|__ Port 6: Dev 4, If 1, Class='bInterfaceClass 0xe0 not yet handled', Driver=btusb, 12M
|__ Port 6: Dev 4, If 2, Class=vend., Driver=, 12M
|__ Port 6: Dev 4, If 3, Class=app., Driver=, 12M