OHCI_ITCTL
OWRITE(sc, OHCI_ITCTL(dmach),
OWRITE(sc, OHCI_ITCTL(dmach), OHCI_CNTL_DMA_RUN);
OWRITE(sc, OHCI_ITCTL(dmach), OHCI_CNTL_DMA_WAKE);
stat = OREAD(sc, OHCI_ITCTL(dmach));