OHCI_INTERRUPT_STATUS
OWRITE4(sc, OHCI_INTERRUPT_STATUS, OHCI_RHSC);
status |= OREAD4(sc, OHCI_INTERRUPT_STATUS);
status = OREAD4(sc, OHCI_INTERRUPT_STATUS) & ~OHCI_WDH;
OWRITE4(sc, OHCI_INTERRUPT_STATUS, status); /* Acknowledge */
OREAD4(sc, OHCI_INTERRUPT_STATUS),