DMA_PULLUP
esc->sc_flags = datain ? DMA_PULLUP : 0;
if (esc->sc_flags & DMA_PULLUP) {
if ((esc->sc_flags & DMA_PULLUP) == 0 &&
if ((esc->sc_flags & DMA_PULLUP) != 0) { /* SCSI Read */
(esc->sc_flags & DMA_PULLUP) != 0 ?