XHCI_PS_SPEED
switch (XHCI_PS_SPEED(v)) {
if (XHCI_PS_SPEED(v) >= XHCI_SPEED_FULL &&
XHCI_PS_SPEED(v) <= XHCI_SPEED_HIGH)
if (XHCI_PS_SPEED(v) == XHCI_SPEED_SUPER) {