OHCI_ITCTL
stat = OREAD(sc, OHCI_ITCTL(dmach));
OWRITE(sc, OHCI_ITCTL(dmach),
OWRITE(sc, OHCI_ITCTL(dmach), OHCI_CNTL_DMA_RUN);
OWRITE(sc, OHCI_ITCTL(dmach), OHCI_CNTL_DMA_WAKE);
off = OHCI_ITCTL(ch - ITX_CH);
off = OHCI_ITCTL(ch - ITX_CH);