176 static void	zs_modem(struct zstty_softc *zst, int onoff);
213 	struct zstty_softc *zst = (void *) self;  local
221 	cf = zst->zst_dev.dv_cfdata;
222 	tty_unit = zst->zst_dev.dv_unit;
225 	cs->cs_private = zst;
228 	zst->zst_cs = cs;
229 	zst->zst_swflags = cf->cf_flags;	/* softcar, etc. */
230 	zst->zst_hwflags = args->hwflags;
233 	if (zst->zst_swflags)
234 		printf(" flags 0x%x", zst->zst_swflags);
236 	if (zst->zst_hwflags & ZS_HWFLAG_CONSOLE)
263 	zst->zst_tty = tp;
264 	zst->zst_rbhiwat =  zstty_rbuf_size;	/* impossible value */
265 	zst->zst_ringmask = zstty_rbuf_size - 1;
266 	zst->zst_rbuf = malloc(zstty_rbuf_size * sizeof(zst->zst_rbuf[0]),
272 	if (zst->zst_hwflags & ZS_HWFLAG_CONSOLE) {
274 		zst->zst_swflags |= TIOCFLAG_SOFTCAR;
297 	zs_modem(zst, (zst->zst_swflags & TIOCFLAG_SOFTCAR) ? 1 : 0);
308 	struct zstty_softc *zst;  local
315 	zst = zstty_cd.cd_devs[unit];
316 	return (zst->zst_tty);
332 	struct zstty_softc *zst;  local
338 	zst = zstty_cd.cd_devs[unit];
339 	if (zst == NULL)
341 	tp = zst->zst_tty;
342 	cs = zst->zst_cs;
364 		if (zst->zst_swflags & TIOCFLAG_CLOCAL)
366 		if (zst->zst_swflags & TIOCFLAG_CRTSCTS)
368 		if (zst->zst_swflags & TIOCFLAG_MDMBUF)
375 		zst->zst_rbget = zst->zst_rbput;
378 		zs_modem(zst, 1);
379 		if (zst->zst_swflags & TIOCFLAG_SOFTCAR) {
408 				zs_modem(zst, 0);
434 	struct zstty_softc *zst;  local
439 	zst = zstty_cd.cd_devs[minor(dev)];
440 	cs = zst->zst_cs;
441 	tp = zst->zst_tty;
449 	if (zst->zst_swflags & TIOCFLAG_SOFTCAR)
452 		zs_modem(zst, 0);
474 	register struct zstty_softc *zst;  local
477 	zst = zstty_cd.cd_devs[minor(dev)];
478 	tp = zst->zst_tty;
488 	register struct zstty_softc *zst;  local
491 	zst = zstty_cd.cd_devs[minor(dev)];
492 	tp = zst->zst_tty;
507 	register struct zstty_softc *zst;  local
512 	zst = zstty_cd.cd_devs[minor(dev)];
513 	cs = zst->zst_cs;
514 	tp = zst->zst_tty;
534 		*(int *)data = zst->zst_swflags;
546 		if (zst->zst_hwflags & ZS_HWFLAG_CONSOLE)
549 		zst->zst_swflags = tmp;
553 		zs_modem(zst, 1);
557 		zs_modem(zst, 0);
577 	register struct zstty_softc *zst;  local
581 	zst = zstty_cd.cd_devs[minor(tp->t_dev)];
582 	cs = zst->zst_cs;
596 		if (zst->zst_tx_stopped)
619 		zst->zst_tx_busy = 1;
624 		zst->zst_tba = p + 1;
625 		zst->zst_tbc = nch - 1;
647 	register struct zstty_softc *zst;  local
651 	zst = zstty_cd.cd_devs[minor(tp->t_dev)];
652 	cs = zst->zst_cs;
661 		zst->zst_tbc = 0;
662 		zst->zst_heldtbc = 0;
681 	register struct zstty_softc *zst;  local
686 	zst = zstty_cd.cd_devs[minor(tp->t_dev)];
687 	cs = zst->zst_cs;
695 		zs_modem(zst, 0);
763 		zst->zst_rbhiwat = zstty_rbuf_hiwat;
766 		zst->zst_rbhiwat = zstty_rbuf_size; /* impossible value */
775 		if (zst->zst_tx_busy) {
776 			zst->zst_heldtbc = zst->zst_tbc;
777 			zst->zst_tbc = 0;
792 zs_modem(zst, onoff)  in zs_modem()  argument
793 	struct zstty_softc *zst;  in zs_modem()
800 	cs = zst->zst_cs;
801 	tp = zst->zst_tty;
813 		if (zst->zst_tx_busy) {
814 			zst->zst_heldtbc = zst->zst_tbc;
815 			zst->zst_tbc = 0;
836 	register struct zstty_softc *zst;  local
839 	zst = zstty_cd.cd_devs[minor(tp->t_dev)];
847 		if (zst->zst_rx_blocked)
849 		zst->zst_rx_blocked = 1;
855 		zst->zst_rx_blocked = 0;
857 	zs_hwiflow(zst, stop);
868 zs_hwiflow(zst, stop)  in zs_hwiflow()  argument
869 	register struct zstty_softc *zst;  in zs_hwiflow()
876 	cs = zst->zst_cs;
877 	tp = zst->zst_tty;
891 		if (zst->zst_tx_busy) {
892 			zst->zst_heldtbc = zst->zst_tbc;
893 			zst->zst_tbc = 0;
916 	register struct zstty_softc *zst;  local
921 	zst = cs->cs_private;
922 	put = zst->zst_rbput;
923 	ringmask = zst->zst_ringmask;
942 	zst->zst_rbuf[put] = ch_rr1;
946 	if (put_next == zst->zst_rbget) {
947 		zst->zst_rx_overrun = 1;
959 	zst->zst_rbput = put;
964 	cc = put - zst->zst_rbget;
967 	if ((cc > zst->zst_rbhiwat) && (zst->zst_rx_blocked == 0)) {
968 		zst->zst_rx_blocked = 1;
969 		zs_hwiflow(zst, 1);
983 	register struct zstty_softc *zst;  local
986 	zst = cs->cs_private;
1004 		count = zst->zst_heldtbc;
1006 		count = zst->zst_tbc;
1014 		zst->zst_tbc = --count;
1015 		zs_write_data(cs, *zst->zst_tba);
1016 		zst->zst_tba++;
1023 	zst->zst_tx_busy = 0;
1024 	zst->zst_tx_done = 1;
1035 	register struct zstty_softc *zst;  local
1039 	zst = cs->cs_private;
1040 	tp  = zst->zst_tty;
1050 		(zst->zst_hwflags & ZS_HWFLAG_CONSOLE))
1064 		zst->zst_tbc = 0;
1065 		zst->zst_heldtbc = 0;
1066 		zst->zst_tx_stopped = 1;
1078 	zst->zst_st_check = 1;
1088 zsoverrun(zst, ptime, what)  in zsoverrun()  argument
1089 	struct zstty_softc *zst;  in zsoverrun()
1097 			zst->zst_dev.dv_xname, what);
1117 	register struct zstty_softc *zst;  local
1125 	zst  = cs->cs_private;
1126 	tp   = zst->zst_tty;
1128 	ringmask = zst->zst_ringmask;
1136 	if (zst->zst_rx_overrun) {
1137 		zst->zst_rx_overrun = 0;
1138 		zsoverrun(zst, &zst->zst_rotime, "ring");
1144 	get = zst->zst_rbget;
1145 	while (get != zst->zst_rbput) {
1146 		ring_data = zst->zst_rbuf[get];
1160 	zst->zst_rbget = get;
1168 		zsoverrun(zst, &zst->zst_fotime, "fifo");
1177 	if (zst->zst_rx_blocked && ((tp->t_state & TS_TBLOCK) == 0)) {
1179 		zst->zst_rx_blocked = 0;
1180 		zs_hwiflow(zst, 0);	/* unblock input */
1189 	if (zst->zst_st_check) {
1190 		zst->zst_st_check = 0;
1198 				zs_modem(zst, c);
1206 				zst->zst_tx_stopped = 0;
1213 	if (zst->zst_tx_done) {
1214 		zst->zst_tx_done = 0;
1219 			ndflush(&tp->t_outq, zst->zst_tba -