UHCI_CMD
#define UHCICMD(sc, cmd) UWRITE2(sc, UHCI_CMD, cmd)
if (UREAD2(sc, UHCI_CMD) & UHCI_CMD_RS) {
if (!(UREAD2(sc, UHCI_CMD) & UHCI_CMD_HCRESET)) {
UREAD2(sc, UHCI_CMD),