CHNCTL_OP_MODE    431 dev/pci/cz.c   		CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_DISABLE);
CHNCTL_OP_MODE    931 dev/pci/cz.c   	CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_DISABLE);
CHNCTL_OP_MODE    997 dev/pci/cz.c   		CZTTY_CHAN_WRITE(sc, CHNCTL_OP_MODE, C_CH_ENABLE);
CHNCTL_OP_MODE   1307 dev/pci/cz.c   	op_mode = CZTTY_CHAN_READ(sc, CHNCTL_OP_MODE);