icw_state
atpic->icw_state = IS_ICW1;
atpic->icw_state = IS_ICW2;
atpic->icw_state = IS_ICW3;
atpic->icw_state = IS_ICW4;
atpic->icw_state = IS_ICW1;
switch (atpic->icw_state) {
chip->vac_icw_state = src->icw_state;
enum icw_state icw_state;
out->icw_state = chip->vac_icw_state;