lsusb -t

root@raspberrypi:~# lsusb -t
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/3p, 480M
        |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 480M
        |__ Port 3: Dev 4, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 1: Dev 5, If 0, Class=Hub, Driver=hub/4p, 480M
                |__ Port 1: Dev 7, If 0, Class=Vendor Specific Class, Driver=ov519, 12M
            |__ Port 2: Dev 6, If 0, Class=Hub, Driver=hub/4p, 480M
                |__ Port 4: Dev 8, If 0, Class=Video, Driver=uvcvideo, 480M
                |__ Port 4: Dev 8, If 1, Class=Video, Driver=uvcvideo, 480M
                |__ Port 4: Dev 8, If 2, Class=Audio, Driver=snd-usb-audio, 480M
                |__ Port 4: Dev 8, If 3, Class=Audio, Driver=snd-usb-audio, 480M
root@raspberrypi:~#