ATW_SYNCTL
if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0)
ATW_WRITE(sc, ATW_SYNCTL, reg);
if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD) == 0)
ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_RD);
*val = MASK_AND_RSHIFT(ATW_READ(sc, ATW_SYNCTL),
PRINTREG(sc, ATW_SYNCTL);