ronin@RoninPC:~$ lsusb -t
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
    |__ Port 2: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 3: Dev 3, If 0, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 3: Dev 3, If 1, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 3: Dev 3, If 2, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 4: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 4: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 5: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M
        |__ Port 5: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M
        |__ Port 5: Dev 5, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 5: Dev 5, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 6: Dev 6, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
        |__ Port 6: Dev 6, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M