XHCI_PORTSC
port = XHCI_PORTSC(xhci_rhport2ctlrport(sc, bn, i));
bsz = XHCI_PORTSC(sc->sc_maxports);
port = XHCI_PORTSC(cp);
v = xhci_op_read_4(sc, XHCI_PORTSC(cp));
port = XHCI_PORTSC(cp);
port = XHCI_PORTSC(xhci_rhport2ctlrport(sc, bn, i));