OHCI_TD_SET_DI
OHCI_TD_SET_DI(1) | OHCI_TD_TOGGLE_CARRY);
OHCI_TD_NOCC | OHCI_TD_TOGGLE_1 | OHCI_TD_SET_DI(1));
tail->td.td_flags |= htole32(OHCI_TD_SET_DI(1));