HCB_DS_BIT
par->board->set_ctl(par, HCB_DS_BIT, 0);
par->board->set_ctl(par, HCB_DS_BIT, 1);
n411_set_ctl(par, HCB_DS_BIT, 1);
case HCB_DS_BIT:
ctl &= ~(HCB_DS_BIT);
ctl |= HCB_DS_BIT;