USB_REV_2_0
vhci->sc_bus.usbrev = USB_REV_2_0;
sc->sc_bus.usbrev = USB_REV_2_0;
sc->sc_bus.usbrev = USB_REV_2_0;
sc->sc_bus.usbrev = USB_REV_2_0;
sc->sc_bus.usbrev = USB_REV_2_0;
case USB_REV_2_0: