116 #define	sio_getreg(com, off) \  argument
117 	(bus_space_read_1((com)->bst, (com)->bsh, (off)))
118 #define	sio_setreg(com, off, value) \  argument
119 	(bus_space_write_1((com)->bst, (com)->bsh, (off), (value)))
156 #define	CE_RECORD(com, errnum)		(++(com)->delta_error_counts[errnum])  argument
256 static	int	espattach(struct com_s *com, Port_t esp_port);
264 static	void	sioinput(struct com_s *com);
265 static	void	siointr1(struct com_s *com);
271 static	int	siosetwater(struct com_s *com, speed_t speed);
334 	struct com_s *com;  in sysctl_machdep_comdefaultrate()  local
348 	com = com_addr(comconsole);  in sysctl_machdep_comdefaultrate()
349 	if (com == NULL)  in sysctl_machdep_comdefaultrate()
352 	tp = com->tp;  in sysctl_machdep_comdefaultrate()
396 	struct com_s	*com;  in siodetach()  local
398 	com = (struct com_s *) device_get_softc(dev);  in siodetach()
399 	if (com == NULL) {  in siodetach()
403 	com->gone = TRUE;  in siodetach()
404 	if (com->tp)  in siodetach()
405 		ttyfree(com->tp);  in siodetach()
406 	if (com->irqres) {  in siodetach()
407 		bus_teardown_intr(dev, com->irqres, com->cookie);  in siodetach()
408 		bus_release_resource(dev, SYS_RES_IRQ, 0, com->irqres);  in siodetach()
410 	if (com->ioportres)  in siodetach()
411 		bus_release_resource(dev, SYS_RES_IOPORT, com->ioportrid,  in siodetach()
412 				     com->ioportres);  in siodetach()
413 	if (com->ibuf != NULL)  in siodetach()
414 		free(com->ibuf, M_DEVBUF);  in siodetach()
417 	free(com, M_DEVBUF);  in siodetach()
432 	struct com_s	*com;  local
453 	com = malloc(sizeof(*com), M_DEVBUF, M_NOWAIT | M_ZERO);
454 	if (com == NULL) {
458 	device_set_softc(dev, com);
459 	com->bst = rman_get_bustag(port);
460 	com->bsh = rman_get_bushandle(port);
463 	com->rclk = rclk;
509 		free(com, M_DEVBUF);
571 		cfcr = sio_getreg(com, com_cfcr);
572 		sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE);
573 		efr = sio_getreg(com, com_efr);
575 		sio_setreg(com, com_efr, efr | EFR_EFE);
577 		sio_setreg(com, com_cfcr, (cfcr != CFCR_EFR_ENABLE) ? cfcr : 0);
579 		sio_setreg(com, com_mcr,
580 			   sio_getreg(com, com_mcr) & ~MCR_PRESCALE);
581 		sio_setreg(com, com_cfcr, CFCR_EFR_ENABLE);
582 		sio_setreg(com, com_efr, efr);
583 		sio_setreg(com, com_cfcr, cfcr);
599 		sio_setreg(com, com_cfcr, CFCR_DLAB | CFCR_8BITS);
601 		sio_setreg(com, com_dlbl, divisor & 0xff);
602 		sio_setreg(com, com_dlbh, divisor >> 8);
603 		sio_setreg(com, com_cfcr, CFCR_8BITS);
613 	sio_setreg(com, com_mcr, mcr_image);
614 	sio_setreg(com, com_ier, 0);
623 	sio_setreg(com, com_mcr, mcr_image | MCR_LOOPBACK);
633 	sio_setreg(com, com_ier, IER_ETXRDY);
641 	sio_setreg(com, com_data, 0);
655 	sio_setreg(com, com_mcr, mcr_image);
662 	sio_setreg(com, com_cfcr, CFCR_8BITS);
675 			failures[6] = sio_getreg(com, com_iir);
685 			sio_setreg(com, com_ier, 0);
686 			if (sio_getreg(com, com_iir) & IIR_NOPEND) {
692 				sio_setreg(com, com_mcr, 0);
698 		sio_setreg(com, com_ier, 0);
699 		sio_setreg(com, com_cfcr, CFCR_8BITS);
714 			free(com, M_DEVBUF);
728 	failures[0] = sio_getreg(com, com_cfcr) - CFCR_8BITS;
729 	failures[1] = sio_getreg(com, com_ier) - IER_ETXRDY;
730 	failures[2] = sio_getreg(com, com_mcr) - mcr_image;
733 	failures[4] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_TXRDY;
736 	failures[6] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND;
747 	sio_setreg(com, com_ier, 0);
748 	sio_setreg(com, com_cfcr, CFCR_8BITS);	/* dummy to avoid bus echo */
749 	failures[7] = sio_getreg(com, com_ier);
752 	failures[9] = (sio_getreg(com, com_iir) & IIR_IMASK) - IIR_NOPEND;
774 			sio_setreg(com, com_mcr, 0);
798 		free(com, M_DEVBUF);
805 espattach(com, esp_port)  in espattach()  argument
806 	struct com_s		*com;  in espattach()
833 	if (rman_get_start(com->ioportres) == likely_com_ports[dips & 0x03])
862 	com->esp = TRUE;
863 	com->esp_port = esp_port;
874 	struct com_s	*com;  local
895 	com = device_get_softc(dev);
912 	bzero(com, sizeof *com);
913 	com->unit = unit;
914 	com->ioportres = port;
915 	com->ioportrid = rid;
916 	com->bst = rman_get_bustag(port);
917 	com->bsh = rman_get_bushandle(port);
918 	com->cfcr_image = CFCR_8BITS;
919 	com->loses_outints = COM_LOSESOUTINTS(flags) != 0;
920 	com->no_irq = bus_get_resource(dev, SYS_RES_IRQ, 0, NULL, NULL) != 0;
921 	com->tx_fifo_size = 1;
922 	com->obufs[0].l_head = com->obuf1;
923 	com->obufs[1].l_head = com->obuf2;
925 	com->data_port = iobase + com_data;
926 	com->int_ctl_port = iobase + com_ier;
927 	com->int_id_port = iobase + com_iir;
928 	com->modem_ctl_port = iobase + com_mcr;
929 	com->mcr_image = inb(com->modem_ctl_port);
930 	com->line_status_port = iobase + com_lsr;
931 	com->modem_status_port = iobase + com_msr;
933 	tp = com->tp = ttyalloc();
941 	tp->t_sc = com;
945 	com->rclk = rclk;
949 	error = siosetwater(com, tp->t_init_in.c_ispeed);
970 		scr = sio_getreg(com, com_scr);
971 		sio_setreg(com, com_scr, 0xa5);
972 		scr1 = sio_getreg(com, com_scr);
973 		sio_setreg(com, com_scr, 0x5a);
974 		scr2 = sio_getreg(com, com_scr);
975 		sio_setreg(com, com_scr, scr);
981 	sio_setreg(com, com_fifo, FIFO_ENABLE | FIFO_RX_HIGH);
983 	switch (inb(com->int_id_port) & IIR_FIFO_MASK) {
998 		com->hasfifo = TRUE;
1001 			com->st16650a = TRUE;
1002 			com->tx_fifo_size = 32;
1007 			com->tx_fifo_size = 64;
1013 			if (espattach(com, *espp)) {
1014 				com->tx_fifo_size = 1024;
1017 		if (com->esp)
1020 		com->tx_fifo_size = COM_FIFOSIZE(flags);
1021 		if (com->tx_fifo_size == 0)
1022 			com->tx_fifo_size = 16;
1025 			       com->tx_fifo_size);
1029 	if (com->esp) {
1037 		outb(com->esp_port + ESP_CMD1, ESP_SETMODE);
1038 		outb(com->esp_port + ESP_CMD2, ESP_MODE_RTS | ESP_MODE_FIFO);
1041 		outb(com->esp_port + ESP_CMD1, ESP_SETFLOWTYPE);
1042 		outb(com->esp_port + ESP_CMD2, ESP_FLOW_RTS);
1043 		outb(com->esp_port + ESP_CMD2, ESP_FLOW_CTS);
1046 		outb(com->esp_port + ESP_CMD1, ESP_SETRXFLOW);
1047 		outb(com->esp_port + ESP_CMD2, HIBYTE(768));
1048 		outb(com->esp_port + ESP_CMD2, LOBYTE(768));
1049 		outb(com->esp_port + ESP_CMD2, HIBYTE(512));
1050 		outb(com->esp_port + ESP_CMD2, LOBYTE(512));
1053 	sio_setreg(com, com_fifo, 0);
1060 		com->multiport = TRUE;
1067 		com->no_irq = (masterdev == NULL || bus_get_resource(masterdev,
1084 	com->flags = flags;
1085 	com->pps.ppscap = PPS_CAPTUREASSERT | PPS_CAPTURECLEAR;
1086 	tp->t_pps = &com->pps;
1089 		com->pps_bit = MSR_CTS;
1091 		com->pps_bit = MSR_DCD;
1092 	pps_init(&com->pps);
1095 	com->irqres = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
1096 	if (com->irqres) {
1097 		ret = bus_setup_intr(dev, com->irqres,
1099 				     siointr, NULL, com, 
1100 				     &com->cookie);
1103 					     com->irqres, INTR_TYPE_TTY,
1104 					     NULL, (driver_intr_t *)siointr, com, &com->cookie);
1130 	struct com_s	*com;  in comopen()  local
1133 	com = tp->t_sc;  in comopen()
1134 	com->poll = com->no_irq;  in comopen()
1135 	com->poll_output = com->loses_outints;  in comopen()
1136 	if (com->hasfifo) {  in comopen()
1149 			sio_setreg(com, com_fifo,  in comopen()
1151 				   | com->fifo_image);  in comopen()
1164 			if (!(inb(com->line_status_port) & LSR_RXRDY))  in comopen()
1166 			sio_setreg(com, com_fifo, 0);  in comopen()
1168 			(void) inb(com->data_port);  in comopen()
1175 	(void) inb(com->line_status_port);  in comopen()
1176 	(void) inb(com->data_port);  in comopen()
1177 	com->prev_modem_status = com->last_modem_status  in comopen()
1178 	    = inb(com->modem_status_port);  in comopen()
1179 	outb(com->int_ctl_port,  in comopen()
1181 	     | (COM_IIR_TXRDYBUG(com->flags) ? 0 : IER_ETXRDY));  in comopen()
1185 	if (com->prev_modem_status & MSR_DCD || ISCALLOUT(dev))  in comopen()
1195 	struct com_s	*com;  local
1198 	com = tp->t_sc;
1199 	com->poll = FALSE;
1200 	com->poll_output = FALSE;
1201 	sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
1209 	if (com->unit != comconsole)
1212 		sio_setreg(com, com_ier, 0);
1222 		        && !(com->prev_modem_status & MSR_DCD)
1229 	if (com->hasfifo) {
1235 		sio_setreg(com, com_fifo, 0);
1248 	struct com_s	*com;  local
1251 	com = (struct com_s *)chan;
1262 	if (com->state & CS_BUSY)
1263 		com->extra_state &= ~CSE_BUSYCHECK;	/* False alarm. */
1264 	else if ((inb(com->line_status_port) & (LSR_TSRE | LSR_TXRDY))
1266 		com->tp->t_state &= ~TS_BUSY;
1267 		ttwwakeup(com->tp);
1268 		com->extra_state &= ~CSE_BUSYCHECK;
1270 		timeout(siobusycheck, com, hz / 100);
1309 sioinput(com)  in sioinput()  argument
1310 	struct com_s	*com;  in sioinput()
1318 	buf = com->ibuf;
1319 	tp = com->tp;
1321 		com_events -= (com->iptr - com->ibuf);
1322 		com->iptr = com->ibuf;
1340 			incc = com->iptr - buf;
1342 			    && (com->state & CS_RTS_IFLOW
1346 			com->delta_error_counts[CE_TTY_BUF_OVERFLOW]
1361 		} while (buf < com->iptr);
1370 			line_status = buf[com->ierroff];
1385 		} while (buf < com->iptr);
1387 	com_events -= (com->iptr - com->ibuf);
1388 	com->iptr = com->ibuf;
1395 	if ((com->state & CS_RTS_IFLOW) && !(com->mcr_image & MCR_RTS) &&
1397 		outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
1404 	struct com_s	*com;  local
1407 	com = (struct com_s *)arg;
1410 	siointr1(com);
1427 			com = com_addr(unit);
1432 			if (com != NULL 
1433 			    && !com->gone
1434 			    && (inb(com->int_id_port) & IIR_IMASK)
1436 				siointr1(com);
1480 siointr1(com)  in siointr1()  argument
1481 	struct com_s	*com;  in siointr1()
1494 	if (COM_IIR_TXRDYBUG(com->flags)) {
1495 		int_ctl = inb(com->int_ctl_port);
1502 	while (!com->gone) {
1503 		if (com->pps.ppsparam.mode & PPS_CAPTUREBOTH) {
1504 			modem_status = inb(com->modem_status_port);
1505 		        if ((modem_status ^ com->last_modem_status) &
1506 			    com->pps_bit) {
1507 				pps_capture(&com->pps);
1508 				pps_event(&com->pps,
1509 				    (modem_status & com->pps_bit) ? 
1513 		line_status = inb(com->line_status_port);
1521 				recv_data = inb(com->data_port);
1523 			if (com->unit == comconsole &&
1524 			    kdb_alt_break(recv_data, &com->alt_brk_state) != 0)
1542 					if (com->unit == comconsole) {
1547 					if (com->tp == NULL
1548 					    || com->tp->t_iflag & IGNBRK)
1551 					if (com->tp == NULL
1552 					    || com->tp->t_iflag & IGNPAR)
1555 				if (com->tp->t_state & TS_CAN_BYPASS_L_RINT
1557 					|| com->tp->t_iflag & INPCK))
1560 			++com->bytes_in;
1561 			if (com->tp != NULL &&
1562 			    com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar)
1564 			ioptr = com->iptr;
1565 			if (ioptr >= com->ibufend)
1566 				CE_RECORD(com, CE_INTERRUPT_BUF_OVERFLOW);
1568 				if (com->tp != NULL && com->tp->t_do_timestamp)
1569 					microtime(&com->tp->t_timestamp);
1573 if (com->iptr - com->ibuf == 8)
1577 				ioptr[com->ierroff] = line_status;
1578 				com->iptr = ++ioptr;
1579 				if (ioptr == com->ihighwater
1580 				    && com->state & CS_RTS_IFLOW)
1581 					outb(com->modem_ctl_port,
1582 					     com->mcr_image &= ~MCR_RTS);
1584 					CE_RECORD(com, CE_OVERRUN);
1588 			    && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY))
1595 			line_status = inb(com->line_status_port) & 0x7F;
1599 		modem_status = inb(com->modem_status_port);
1600 		if (modem_status != com->last_modem_status) {
1607 			com->last_modem_status = modem_status;
1608 			if (!(com->state & CS_CHECKMSR)) {
1610 				com->state |= CS_CHECKMSR;
1615 			if (com->state & CS_CTS_OFLOW) {
1617 					com->state |= CS_ODEVREADY;
1619 					com->state &= ~CS_ODEVREADY;
1626 		    && com->state >= (CS_BUSY | CS_TTGO | CS_ODEVREADY)) {
1627 			ioptr = com->obufq.l_head;
1628 			if (com->tx_fifo_size > 1 && com->unit != siotsunit) {
1631 				ocount = com->obufq.l_tail - ioptr;
1632 				if (ocount > com->tx_fifo_size)
1633 					ocount = com->tx_fifo_size;
1634 				com->bytes_out += ocount;
1636 					outb(com->data_port, *ioptr++);
1639 				outb(com->data_port, *ioptr++);
1640 				++com->bytes_out;
1641 				if (com->unit == siotsunit
1645 			com->obufq.l_head = ioptr;
1646 			if (COM_IIR_TXRDYBUG(com->flags))
1648 			if (ioptr >= com->obufq.l_tail) {
1651 				qp = com->obufq.l_next;
1655 					com->obufq.l_head = qp->l_head;
1656 					com->obufq.l_tail = qp->l_tail;
1657 					com->obufq.l_next = qp;
1660 					if (COM_IIR_TXRDYBUG(com->flags))
1663 					com->state &= ~CS_BUSY;
1665 				if (!(com->state & CS_ODONE)) {
1667 					com->state |= CS_ODONE;
1672 			if (COM_IIR_TXRDYBUG(com->flags)
1674 				outb(com->int_ctl_port, int_ctl_new);
1679 		if ((inb(com->int_id_port) & IIR_IMASK) == IIR_NOPEND)
1695 		struct com_s	*com;  in siopoll()  local
1699 		com = com_addr(unit);  in siopoll()
1700 		if (com == NULL)  in siopoll()
1702 		tp = com->tp;  in siopoll()
1703 		if (tp == NULL || com->gone) {  in siopoll()
1709 			incc = com->iptr - com->ibuf;  in siopoll()
1710 			com->iptr = com->ibuf;  in siopoll()
1711 			if (com->state & CS_CHECKMSR) {  in siopoll()
1713 				com->state &= ~CS_CHECKMSR;  in siopoll()
1719 		if (com->iptr != com->ibuf) {  in siopoll()
1721 			sioinput(com);  in siopoll()
1724 		if (com->state & CS_CHECKMSR) {  in siopoll()
1728 			delta_modem_status = com->last_modem_status  in siopoll()
1729 					     ^ com->prev_modem_status;  in siopoll()
1730 			com->prev_modem_status = com->last_modem_status;  in siopoll()
1732 			com->state &= ~CS_CHECKMSR;  in siopoll()
1736 				    com->prev_modem_status & MSR_DCD);  in siopoll()
1738 		if (com->state & CS_ODONE) {  in siopoll()
1741 			com->state &= ~CS_ODONE;  in siopoll()
1743 			if (!(com->state & CS_BUSY)  in siopoll()
1744 			    && !(com->extra_state & CSE_BUSYCHECK)) {  in siopoll()
1745 				timeout(siobusycheck, com, hz / 100);  in siopoll()
1746 				com->extra_state |= CSE_BUSYCHECK;  in siopoll()
1762 	struct com_s	*com;  local
1764 	com = tp->t_sc;
1767 		sio_setreg(com, com_cfcr, com->cfcr_image |= CFCR_SBREAK);
1769 		sio_setreg(com, com_cfcr, com->cfcr_image &= ~CFCR_SBREAK);
1779 	struct com_s	*com;  local
1786 	com = tp->t_sc;
1787 	if (com == NULL)
1793 	divisor = siodivisor(com->rclk, t->c_ispeed);
1826 	if (com->hasfifo) {
1840 		com->fifo_image = com->unit == siotsunit ? 0
1849 		if (com->esp)
1850 			com->fifo_image |= FIFO_DMA_MODE;
1852 		sio_setreg(com, com_fifo, com->fifo_image);
1860 	(void) siosetwater(com, t->c_ispeed);
1862 	sio_setreg(com, com_cfcr, cfcr | CFCR_DLAB);
1869 	if (sio_getreg(com, com_dlbl) != dlbl)
1870 		sio_setreg(com, com_dlbl, dlbl);
1872 	if (sio_getreg(com, com_dlbh) != dlbh)
1873 		sio_setreg(com, com_dlbh, dlbh);
1878 		com->state |= CS_RTS_IFLOW;
1886 	} else if (com->state & CS_RTS_IFLOW) {
1887 		com->state &= ~CS_RTS_IFLOW;
1892 		outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
1900 	com->state |= CS_ODEVREADY;
1901 	com->state &= ~CS_CTS_OFLOW;
1903 		com->state |= CS_CTS_OFLOW;
1905 		if (!(com->last_modem_status & MSR_CTS))
1906 			com->state &= ~CS_ODEVREADY;
1909 	if (com->st16650a) {
1910 		sio_setreg(com, com_lcr, LCR_EFR_ENABLE);
1911 		sio_setreg(com, com_efr,
1912 			   (sio_getreg(com, com_efr)
1915 	sio_setreg(com, com_cfcr, com->cfcr_image = cfcr);
1923 	if (com->ibufold != NULL) {
1924 		free(com->ibufold, M_DEVBUF);
1925 		com->ibufold = NULL;
1935 siosetwater(com, speed)  in siosetwater()  argument
1936 	struct com_s	*com;  in siosetwater()
1953 	if (ibufsize == com->ibufsize) {
1969 	com->ibufold = com->ibuf;
1970 	com->ibufsize = ibufsize;
1971 	tp = com->tp;
1983 	if (com->iptr != com->ibuf)
1984 		sioinput(com);
1997 	com->iptr = com->ibuf = ibuf;
1998 	com->ibufend = ibuf + ibufsize;
1999 	com->ierroff = ibufsize;
2000 	com->ihighwater = ibuf + 3 * ibufsize / 4;
2008 	struct com_s	*com;  local
2011 	com = tp->t_sc;
2012 	if (com == NULL)
2017 		com->state &= ~CS_TTGO;
2019 		com->state |= CS_TTGO;
2021 		if (com->mcr_image & MCR_RTS && com->state & CS_RTS_IFLOW)
2022 			outb(com->modem_ctl_port, com->mcr_image &= ~MCR_RTS);
2024 		if (!(com->mcr_image & MCR_RTS) && com->iptr < com->ihighwater
2025 		    && com->state & CS_RTS_IFLOW)
2026 			outb(com->modem_ctl_port, com->mcr_image |= MCR_RTS);
2038 		if (!com->obufs[0].l_queued) {
2039 			com->obufs[0].l_tail
2040 			    = com->obuf1 + q_to_b(&tp->t_outq, com->obuf1,
2041 						  sizeof com->obuf1);
2042 			com->obufs[0].l_next = NULL;
2043 			com->obufs[0].l_queued = TRUE;
2045 			if (com->state & CS_BUSY) {
2046 				qp = com->obufq.l_next;
2049 				qp->l_next = &com->obufs[0];
2051 				com->obufq.l_head = com->obufs[0].l_head;
2052 				com->obufq.l_tail = com->obufs[0].l_tail;
2053 				com->obufq.l_next = &com->obufs[0];
2054 				com->state |= CS_BUSY;
2058 		if (tp->t_outq.c_cc != 0 && !com->obufs[1].l_queued) {
2059 			com->obufs[1].l_tail
2060 			    = com->obuf2 + q_to_b(&tp->t_outq, com->obuf2,
2061 						  sizeof com->obuf2);
2062 			com->obufs[1].l_next = NULL;
2063 			com->obufs[1].l_queued = TRUE;
2065 			if (com->state & CS_BUSY) {
2066 				qp = com->obufq.l_next;
2069 				qp->l_next = &com->obufs[1];
2071 				com->obufq.l_head = com->obufs[1].l_head;
2072 				com->obufq.l_tail = com->obufs[1].l_tail;
2073 				com->obufq.l_next = &com->obufs[1];
2074 				com->state |= CS_BUSY;
2081 	if (com->state >= (CS_BUSY | CS_TTGO))
2082 		siointr1(com);	/* fake interrupt to start output */
2093 	struct com_s	*com;  local
2095 	com = tp->t_sc;
2096 	if (com == NULL || com->gone)
2100 		if (com->hasfifo)
2103 		    if (!com->esp)
2105 			sio_setreg(com, com_fifo,
2106 				   FIFO_XMT_RST | com->fifo_image);
2107 		com->obufs[0].l_queued = FALSE;
2108 		com->obufs[1].l_queued = FALSE;
2109 		if (com->state & CS_ODONE)
2111 		com->state &= ~(CS_ODONE | CS_BUSY);
2112 		com->tp->t_state &= ~TS_BUSY;
2115 		if (com->hasfifo)
2118 		    if (!com->esp)
2120 			sio_setreg(com, com_fifo,
2121 				   FIFO_RCV_RST | com->fifo_image);
2122 		com_events -= (com->iptr - com->ibuf);
2123 		com->iptr = com->ibuf;
2132 	struct com_s	*com;  in commodem()  local
2135 	com = tp->t_sc;  in commodem()
2136 	if (com->gone)  in commodem()
2150 		com->mcr_image &= bitand;  in commodem()
2151 		com->mcr_image |= bitor;  in commodem()
2152 		outb(com->modem_ctl_port, com->mcr_image);  in commodem()
2157 		if (com->mcr_image & MCR_DTR)  in commodem()
2159 		if (com->mcr_image & MCR_RTS)  in commodem()
2161 		msr = com->prev_modem_status;  in commodem()
2179 	struct com_s	*com;  in siosettimeout()  local
2192 		com = com_addr(unit);  in siosettimeout()
2193 		if (com != NULL && com->tp != NULL  in siosettimeout()
2194 		    && com->tp->t_state & TS_ISOPEN && !com->gone) {  in siosettimeout()
2196 			if (com->poll || com->poll_output) {  in siosettimeout()
2218 	struct com_s	*com;  local
2228 		com = com_addr(unit);
2229 		if (com != NULL && !com->gone
2230 		    && (com->state >= (CS_BUSY | CS_TTGO) || com->poll)) {
2232 			siointr1(com);
2246 		com = com_addr(unit);
2247 		if (com == NULL)
2249 		if (com->gone)
2256 			delta = com->delta_error_counts[errnum];
2257 			com->delta_error_counts[errnum] = 0;
2261 			total = com->error_counts[errnum] += delta;