/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/8p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 1: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 480M
        |__ Port 2: Dev 4, If 0, Class=Hub, Driver=hub/4p, 12M
            |__ Port 3: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
            |__ Port 3: Dev 5, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
            |__ Port 4: Dev 6, If 0, Class=(Defined at Interface level), Driver=synaptics_usb, 1.5M
            |__ Port 4: Dev 6, If 1, Class=(Defined at Interface level), Driver=synaptics_usb, 1.5M