XHCI_CRCR_LO
temp = XREAD4(sc, oper, XHCI_CRCR_LO);
XWRITE4(sc, oper, XHCI_CRCR_LO, temp | XHCI_CRCR_LO_CS);
XWRITE4(sc, oper, XHCI_CRCR_LO, temp | XHCI_CRCR_LO_CA);
temp = XREAD4(sc, oper, XHCI_CRCR_LO);
XWRITE4(sc, oper, XHCI_CRCR_LO, ((uint32_t)addr) | XHCI_CRCR_LO_RCS);
XWRITE4(sc, oper, XHCI_CRCR_LO, ((uint32_t)addr) | XHCI_CRCR_LO_RCS);
case XHCI_CRCR_LO:
case XHCI_CRCR_LO: /* 0x18 */