AS_IDLE
{ AS_ACTIVE0, AS_ACTIVE1, AS_IDLE, AS_IDLE, AS_IDLE }, /* idle */
{ AS_ACTIVE0, AS_ACTIVE0, AS_ACTIVE0, AS_IDLE, AS_ACTIVE0 }, /* active0 */
{ AS_ACTIVE1, AS_ACTIVE1, AS_ACTIVE1, AS_IDLE, AS_ACTIVE1 }, /* active1 */
ata_ctlp->ac_state = AS_IDLE;
ata_ctlp->ac_state = AS_IDLE;
case AS_IDLE: