xref: /freebsd/sys/dev/uart/uart_tty.c (revision 9976156f12f1be7cb85c90e9ef54be06690bc955)
1098ca2bdSWarner Losh /*-
227d5dc18SMarcel Moolenaar  * Copyright (c) 2003 Marcel Moolenaar
327d5dc18SMarcel Moolenaar  * All rights reserved.
427d5dc18SMarcel Moolenaar  *
527d5dc18SMarcel Moolenaar  * Redistribution and use in source and binary forms, with or without
627d5dc18SMarcel Moolenaar  * modification, are permitted provided that the following conditions
727d5dc18SMarcel Moolenaar  * are met:
827d5dc18SMarcel Moolenaar  *
927d5dc18SMarcel Moolenaar  * 1. Redistributions of source code must retain the above copyright
1027d5dc18SMarcel Moolenaar  *    notice, this list of conditions and the following disclaimer.
1127d5dc18SMarcel Moolenaar  * 2. Redistributions in binary form must reproduce the above copyright
1227d5dc18SMarcel Moolenaar  *    notice, this list of conditions and the following disclaimer in the
1327d5dc18SMarcel Moolenaar  *    documentation and/or other materials provided with the distribution.
1427d5dc18SMarcel Moolenaar  *
1527d5dc18SMarcel Moolenaar  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
1627d5dc18SMarcel Moolenaar  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
1727d5dc18SMarcel Moolenaar  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
1827d5dc18SMarcel Moolenaar  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
1927d5dc18SMarcel Moolenaar  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
2027d5dc18SMarcel Moolenaar  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
2127d5dc18SMarcel Moolenaar  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
2227d5dc18SMarcel Moolenaar  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
2327d5dc18SMarcel Moolenaar  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
2427d5dc18SMarcel Moolenaar  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
2527d5dc18SMarcel Moolenaar  */
2627d5dc18SMarcel Moolenaar 
2727d5dc18SMarcel Moolenaar #include <sys/cdefs.h>
2827d5dc18SMarcel Moolenaar __FBSDID("$FreeBSD$");
2927d5dc18SMarcel Moolenaar 
3027d5dc18SMarcel Moolenaar #include <sys/param.h>
3127d5dc18SMarcel Moolenaar #include <sys/systm.h>
3227d5dc18SMarcel Moolenaar #include <sys/bus.h>
3327d5dc18SMarcel Moolenaar #include <sys/conf.h>
3427d5dc18SMarcel Moolenaar #include <sys/cons.h>
3527d5dc18SMarcel Moolenaar #include <sys/fcntl.h>
3627d5dc18SMarcel Moolenaar #include <sys/interrupt.h>
3727d5dc18SMarcel Moolenaar #include <sys/kernel.h>
3827d5dc18SMarcel Moolenaar #include <sys/malloc.h>
3927d5dc18SMarcel Moolenaar #include <sys/reboot.h>
4027d5dc18SMarcel Moolenaar #include <machine/bus.h>
4127d5dc18SMarcel Moolenaar #include <sys/rman.h>
4227d5dc18SMarcel Moolenaar #include <sys/tty.h>
4327d5dc18SMarcel Moolenaar #include <machine/resource.h>
4427d5dc18SMarcel Moolenaar #include <machine/stdarg.h>
4527d5dc18SMarcel Moolenaar 
4627d5dc18SMarcel Moolenaar #include <dev/uart/uart.h>
4727d5dc18SMarcel Moolenaar #include <dev/uart/uart_bus.h>
4827d5dc18SMarcel Moolenaar #include <dev/uart/uart_cpu.h>
4927d5dc18SMarcel Moolenaar 
5027d5dc18SMarcel Moolenaar #include "uart_if.h"
5127d5dc18SMarcel Moolenaar 
5227d5dc18SMarcel Moolenaar static cn_probe_t uart_cnprobe;
5327d5dc18SMarcel Moolenaar static cn_init_t uart_cninit;
5427d5dc18SMarcel Moolenaar static cn_term_t uart_cnterm;
5527d5dc18SMarcel Moolenaar static cn_getc_t uart_cngetc;
5627d5dc18SMarcel Moolenaar static cn_putc_t uart_cnputc;
57*9976156fSAndriy Gapon static cn_grab_t uart_cngrab;
58*9976156fSAndriy Gapon static cn_ungrab_t uart_cnungrab;
5927d5dc18SMarcel Moolenaar 
607672c959SPoul-Henning Kamp CONSOLE_DRIVER(uart);
6127d5dc18SMarcel Moolenaar 
6227d5dc18SMarcel Moolenaar static struct uart_devinfo uart_console;
6327d5dc18SMarcel Moolenaar 
6427d5dc18SMarcel Moolenaar static void
6527d5dc18SMarcel Moolenaar uart_cnprobe(struct consdev *cp)
6627d5dc18SMarcel Moolenaar {
6727d5dc18SMarcel Moolenaar 
6827d5dc18SMarcel Moolenaar 	cp->cn_pri = CN_DEAD;
6927d5dc18SMarcel Moolenaar 
7027d5dc18SMarcel Moolenaar 	KASSERT(uart_console.cookie == NULL, ("foo"));
7127d5dc18SMarcel Moolenaar 
7227d5dc18SMarcel Moolenaar 	if (uart_cpu_getdev(UART_DEV_CONSOLE, &uart_console))
7327d5dc18SMarcel Moolenaar 		return;
7427d5dc18SMarcel Moolenaar 
7527d5dc18SMarcel Moolenaar 	if (uart_probe(&uart_console))
7627d5dc18SMarcel Moolenaar 		return;
7727d5dc18SMarcel Moolenaar 
789f0974f9SMarcel Moolenaar 	strlcpy(cp->cn_name, uart_driver_name, sizeof(cp->cn_name));
7927d5dc18SMarcel Moolenaar 	cp->cn_pri = (boothowto & RB_SERIAL) ? CN_REMOTE : CN_NORMAL;
8027d5dc18SMarcel Moolenaar 	cp->cn_arg = &uart_console;
8127d5dc18SMarcel Moolenaar }
8227d5dc18SMarcel Moolenaar 
8327d5dc18SMarcel Moolenaar static void
8427d5dc18SMarcel Moolenaar uart_cninit(struct consdev *cp)
8527d5dc18SMarcel Moolenaar {
8627d5dc18SMarcel Moolenaar 	struct uart_devinfo *di;
8727d5dc18SMarcel Moolenaar 
8827d5dc18SMarcel Moolenaar 	/*
8927d5dc18SMarcel Moolenaar 	 * Yedi trick: we need to be able to define cn_dev before we go
9027d5dc18SMarcel Moolenaar 	 * single- or multi-user. The problem is that we don't know at
9127d5dc18SMarcel Moolenaar 	 * this time what the device will be. Hence, we need to link from
9227d5dc18SMarcel Moolenaar 	 * the uart_devinfo to the consdev that corresponds to it so that
9327d5dc18SMarcel Moolenaar 	 * we can define cn_dev in uart_bus_attach() when we find the
9427d5dc18SMarcel Moolenaar 	 * device during bus enumeration. That's when we'll know what the
9527d5dc18SMarcel Moolenaar 	 * the unit number will be.
9627d5dc18SMarcel Moolenaar 	 */
9727d5dc18SMarcel Moolenaar 	di = cp->cn_arg;
9827d5dc18SMarcel Moolenaar 	KASSERT(di->cookie == NULL, ("foo"));
9927d5dc18SMarcel Moolenaar 	di->cookie = cp;
10027d5dc18SMarcel Moolenaar 	di->type = UART_DEV_CONSOLE;
10127d5dc18SMarcel Moolenaar 	uart_add_sysdev(di);
10227d5dc18SMarcel Moolenaar 	uart_init(di);
10327d5dc18SMarcel Moolenaar }
10427d5dc18SMarcel Moolenaar 
10527d5dc18SMarcel Moolenaar static void
10627d5dc18SMarcel Moolenaar uart_cnterm(struct consdev *cp)
10727d5dc18SMarcel Moolenaar {
10827d5dc18SMarcel Moolenaar 
10927d5dc18SMarcel Moolenaar 	uart_term(cp->cn_arg);
11027d5dc18SMarcel Moolenaar }
11127d5dc18SMarcel Moolenaar 
11227d5dc18SMarcel Moolenaar static void
113*9976156fSAndriy Gapon uart_cngrab(struct consdev *cp)
114*9976156fSAndriy Gapon {
115*9976156fSAndriy Gapon }
116*9976156fSAndriy Gapon 
117*9976156fSAndriy Gapon static void
118*9976156fSAndriy Gapon uart_cnungrab(struct consdev *cp)
119*9976156fSAndriy Gapon {
120*9976156fSAndriy Gapon }
121*9976156fSAndriy Gapon 
122*9976156fSAndriy Gapon static void
12327d5dc18SMarcel Moolenaar uart_cnputc(struct consdev *cp, int c)
12427d5dc18SMarcel Moolenaar {
12527d5dc18SMarcel Moolenaar 
12627d5dc18SMarcel Moolenaar 	uart_putc(cp->cn_arg, c);
12727d5dc18SMarcel Moolenaar }
12827d5dc18SMarcel Moolenaar 
12927d5dc18SMarcel Moolenaar static int
13027d5dc18SMarcel Moolenaar uart_cngetc(struct consdev *cp)
13127d5dc18SMarcel Moolenaar {
13227d5dc18SMarcel Moolenaar 
1337672c959SPoul-Henning Kamp 	return (uart_poll(cp->cn_arg));
13427d5dc18SMarcel Moolenaar }
13527d5dc18SMarcel Moolenaar 
13679a8d927SPoul-Henning Kamp static int
137bc093719SEd Schouten uart_tty_open(struct tty *tp)
13879a8d927SPoul-Henning Kamp {
13979a8d927SPoul-Henning Kamp 	struct uart_softc *sc;
14079a8d927SPoul-Henning Kamp 
141bc093719SEd Schouten 	sc = tty_softc(tp);
142793bcd17SMarcel Moolenaar 
143793bcd17SMarcel Moolenaar 	if (sc == NULL || sc->sc_leaving)
144793bcd17SMarcel Moolenaar 		return (ENXIO);
145793bcd17SMarcel Moolenaar 
14679a8d927SPoul-Henning Kamp 	sc->sc_opened = 1;
14779a8d927SPoul-Henning Kamp 	return (0);
14879a8d927SPoul-Henning Kamp }
14979a8d927SPoul-Henning Kamp 
15079a8d927SPoul-Henning Kamp static void
15179a8d927SPoul-Henning Kamp uart_tty_close(struct tty *tp)
15279a8d927SPoul-Henning Kamp {
15379a8d927SPoul-Henning Kamp 	struct uart_softc *sc;
15479a8d927SPoul-Henning Kamp 
155bc093719SEd Schouten 	sc = tty_softc(tp);
156fbbec42fSPoul-Henning Kamp 	if (sc == NULL || sc->sc_leaving || !sc->sc_opened)
15779a8d927SPoul-Henning Kamp 		return;
15879a8d927SPoul-Henning Kamp 
15979a8d927SPoul-Henning Kamp 	if (sc->sc_hwiflow)
16079a8d927SPoul-Henning Kamp 		UART_IOCTL(sc, UART_IOCTL_IFLOW, 0);
16179a8d927SPoul-Henning Kamp 	if (sc->sc_hwoflow)
16279a8d927SPoul-Henning Kamp 		UART_IOCTL(sc, UART_IOCTL_OFLOW, 0);
16379a8d927SPoul-Henning Kamp 	if (sc->sc_sysdev == NULL)
16479a8d927SPoul-Henning Kamp 		UART_SETSIG(sc, SER_DDTR | SER_DRTS);
16579a8d927SPoul-Henning Kamp 
16679a8d927SPoul-Henning Kamp 	wakeup(sc);
16779a8d927SPoul-Henning Kamp 	sc->sc_opened = 0;
16879a8d927SPoul-Henning Kamp 	return;
16979a8d927SPoul-Henning Kamp }
17079a8d927SPoul-Henning Kamp 
17127d5dc18SMarcel Moolenaar static void
172bc093719SEd Schouten uart_tty_outwakeup(struct tty *tp)
17327d5dc18SMarcel Moolenaar {
17427d5dc18SMarcel Moolenaar 	struct uart_softc *sc;
17527d5dc18SMarcel Moolenaar 
176bc093719SEd Schouten 	sc = tty_softc(tp);
17727d5dc18SMarcel Moolenaar 	if (sc == NULL || sc->sc_leaving)
17827d5dc18SMarcel Moolenaar 		return;
17927d5dc18SMarcel Moolenaar 
180bc093719SEd Schouten 	if (sc->sc_txbusy)
18127d5dc18SMarcel Moolenaar 		return;
18227d5dc18SMarcel Moolenaar 
183f1fb9647SMarcel Moolenaar 	/*
184f1fb9647SMarcel Moolenaar 	 * Respect RTS/CTS (output) flow control if enabled and not already
185f1fb9647SMarcel Moolenaar 	 * handled by hardware.
186f1fb9647SMarcel Moolenaar 	 */
187f1fb9647SMarcel Moolenaar 	if ((tp->t_termios.c_cflag & CCTS_OFLOW) && !sc->sc_hwoflow &&
188f1fb9647SMarcel Moolenaar 	    !(sc->sc_hwsig & SER_CTS))
189f1fb9647SMarcel Moolenaar 		return;
190f1fb9647SMarcel Moolenaar 
191bc093719SEd Schouten 	sc->sc_txdatasz = ttydisc_getc(tp, sc->sc_txbuf, sc->sc_txfifosz);
192bc093719SEd Schouten 	if (sc->sc_txdatasz != 0)
193bc093719SEd Schouten 		UART_TRANSMIT(sc);
19427d5dc18SMarcel Moolenaar }
19527d5dc18SMarcel Moolenaar 
1960acb3c4aSMarcel Moolenaar static void
1970acb3c4aSMarcel Moolenaar uart_tty_inwakeup(struct tty *tp)
1980acb3c4aSMarcel Moolenaar {
1990acb3c4aSMarcel Moolenaar 	struct uart_softc *sc;
2000acb3c4aSMarcel Moolenaar 
2010acb3c4aSMarcel Moolenaar 	sc = tty_softc(tp);
2020acb3c4aSMarcel Moolenaar 	if (sc == NULL || sc->sc_leaving)
2030acb3c4aSMarcel Moolenaar 		return;
2040acb3c4aSMarcel Moolenaar 
2050acb3c4aSMarcel Moolenaar 	if (sc->sc_isquelch) {
2060acb3c4aSMarcel Moolenaar 		if ((tp->t_termios.c_cflag & CRTS_IFLOW) && !sc->sc_hwiflow)
2070acb3c4aSMarcel Moolenaar 			UART_SETSIG(sc, SER_DRTS|SER_RTS);
2080acb3c4aSMarcel Moolenaar 		sc->sc_isquelch = 0;
2090acb3c4aSMarcel Moolenaar 		uart_sched_softih(sc, SER_INT_RXREADY);
2100acb3c4aSMarcel Moolenaar 	}
2110acb3c4aSMarcel Moolenaar }
2120acb3c4aSMarcel Moolenaar 
213bc093719SEd Schouten static int
214bc093719SEd Schouten uart_tty_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
215bc093719SEd Schouten {
216bc093719SEd Schouten 	struct uart_softc *sc;
217bc093719SEd Schouten 
218bc093719SEd Schouten 	sc = tty_softc(tp);
219bc093719SEd Schouten 
220bc093719SEd Schouten 	switch (cmd) {
221bc093719SEd Schouten 	case TIOCSBRK:
222bc093719SEd Schouten 		UART_IOCTL(sc, UART_IOCTL_BREAK, 1);
223bc093719SEd Schouten 		return (0);
224bc093719SEd Schouten 	case TIOCCBRK:
225bc093719SEd Schouten 		UART_IOCTL(sc, UART_IOCTL_BREAK, 0);
226bc093719SEd Schouten 		return (0);
227bc093719SEd Schouten 	default:
228bc093719SEd Schouten 		return pps_ioctl(cmd, data, &sc->sc_pps);
229bc093719SEd Schouten 	}
23027d5dc18SMarcel Moolenaar }
23127d5dc18SMarcel Moolenaar 
23227d5dc18SMarcel Moolenaar static int
23327d5dc18SMarcel Moolenaar uart_tty_param(struct tty *tp, struct termios *t)
23427d5dc18SMarcel Moolenaar {
23527d5dc18SMarcel Moolenaar 	struct uart_softc *sc;
23627d5dc18SMarcel Moolenaar 	int databits, parity, stopbits;
23727d5dc18SMarcel Moolenaar 
238bc093719SEd Schouten 	sc = tty_softc(tp);
23927d5dc18SMarcel Moolenaar 	if (sc == NULL || sc->sc_leaving)
24027d5dc18SMarcel Moolenaar 		return (ENODEV);
24127d5dc18SMarcel Moolenaar 	if (t->c_ispeed != t->c_ospeed && t->c_ospeed != 0)
24227d5dc18SMarcel Moolenaar 		return (EINVAL);
24327d5dc18SMarcel Moolenaar 	/* Fixate certain parameters for system devices. */
24427d5dc18SMarcel Moolenaar 	if (sc->sc_sysdev != NULL) {
24527d5dc18SMarcel Moolenaar 		t->c_ispeed = t->c_ospeed = sc->sc_sysdev->baudrate;
24627d5dc18SMarcel Moolenaar 		t->c_cflag |= CLOCAL;
24727d5dc18SMarcel Moolenaar 		t->c_cflag &= ~HUPCL;
24827d5dc18SMarcel Moolenaar 	}
24927d5dc18SMarcel Moolenaar 	if (t->c_ospeed == 0) {
25028710806SPoul-Henning Kamp 		UART_SETSIG(sc, SER_DDTR | SER_DRTS);
25127d5dc18SMarcel Moolenaar 		return (0);
25227d5dc18SMarcel Moolenaar 	}
25327d5dc18SMarcel Moolenaar 	switch (t->c_cflag & CSIZE) {
25427d5dc18SMarcel Moolenaar 	case CS5:	databits = 5; break;
25527d5dc18SMarcel Moolenaar 	case CS6:	databits = 6; break;
25627d5dc18SMarcel Moolenaar 	case CS7:	databits = 7; break;
25727d5dc18SMarcel Moolenaar 	default:	databits = 8; break;
25827d5dc18SMarcel Moolenaar 	}
25927d5dc18SMarcel Moolenaar 	stopbits = (t->c_cflag & CSTOPB) ? 2 : 1;
26027d5dc18SMarcel Moolenaar 	if (t->c_cflag & PARENB)
26127d5dc18SMarcel Moolenaar 		parity = (t->c_cflag & PARODD) ? UART_PARITY_ODD
26227d5dc18SMarcel Moolenaar 		    : UART_PARITY_EVEN;
26327d5dc18SMarcel Moolenaar 	else
26427d5dc18SMarcel Moolenaar 		parity = UART_PARITY_NONE;
265b662bdc2SMarcel Moolenaar 	if (UART_PARAM(sc, t->c_ospeed, databits, stopbits, parity) != 0)
266b662bdc2SMarcel Moolenaar 		return (EINVAL);
26728710806SPoul-Henning Kamp 	UART_SETSIG(sc, SER_DDTR | SER_DTR);
26827d5dc18SMarcel Moolenaar 	/* Set input flow control state. */
26927d5dc18SMarcel Moolenaar 	if (!sc->sc_hwiflow) {
2700acb3c4aSMarcel Moolenaar 		if ((t->c_cflag & CRTS_IFLOW) && sc->sc_isquelch)
27128710806SPoul-Henning Kamp 			UART_SETSIG(sc, SER_DRTS);
2720acb3c4aSMarcel Moolenaar 		else
27328710806SPoul-Henning Kamp 			UART_SETSIG(sc, SER_DRTS | SER_RTS);
27427d5dc18SMarcel Moolenaar 	} else
27527d5dc18SMarcel Moolenaar 		UART_IOCTL(sc, UART_IOCTL_IFLOW, (t->c_cflag & CRTS_IFLOW));
27627d5dc18SMarcel Moolenaar 	/* Set output flow control state. */
27727d5dc18SMarcel Moolenaar 	if (sc->sc_hwoflow)
27827d5dc18SMarcel Moolenaar 		UART_IOCTL(sc, UART_IOCTL_OFLOW, (t->c_cflag & CCTS_OFLOW));
279bc093719SEd Schouten 
28027d5dc18SMarcel Moolenaar 	return (0);
28127d5dc18SMarcel Moolenaar }
28227d5dc18SMarcel Moolenaar 
28396df2b0bSPoul-Henning Kamp static int
28496df2b0bSPoul-Henning Kamp uart_tty_modem(struct tty *tp, int biton, int bitoff)
28596df2b0bSPoul-Henning Kamp {
28696df2b0bSPoul-Henning Kamp 	struct uart_softc *sc;
28796df2b0bSPoul-Henning Kamp 
288bc093719SEd Schouten 	sc = tty_softc(tp);
28996df2b0bSPoul-Henning Kamp 	if (biton != 0 || bitoff != 0)
29096df2b0bSPoul-Henning Kamp 		UART_SETSIG(sc, SER_DELTA(bitoff|biton) | biton);
29196df2b0bSPoul-Henning Kamp 	return (sc->sc_hwsig);
29296df2b0bSPoul-Henning Kamp }
29396df2b0bSPoul-Henning Kamp 
29427d5dc18SMarcel Moolenaar void
29527d5dc18SMarcel Moolenaar uart_tty_intr(void *arg)
29627d5dc18SMarcel Moolenaar {
29727d5dc18SMarcel Moolenaar 	struct uart_softc *sc = arg;
29827d5dc18SMarcel Moolenaar 	struct tty *tp;
299bc093719SEd Schouten 	int c, err = 0, pend, sig, xc;
30027d5dc18SMarcel Moolenaar 
30127d5dc18SMarcel Moolenaar 	if (sc->sc_leaving)
30227d5dc18SMarcel Moolenaar 		return;
30327d5dc18SMarcel Moolenaar 
30427d5dc18SMarcel Moolenaar 	pend = atomic_readandclear_32(&sc->sc_ttypend);
3052d511805SMarcel Moolenaar 	if (!(pend & SER_INT_MASK))
30627d5dc18SMarcel Moolenaar 		return;
30727d5dc18SMarcel Moolenaar 
30827d5dc18SMarcel Moolenaar 	tp = sc->sc_u.u_tty.tp;
309bc093719SEd Schouten 	tty_lock(tp);
31027d5dc18SMarcel Moolenaar 
3112d511805SMarcel Moolenaar 	if (pend & SER_INT_RXREADY) {
3120acb3c4aSMarcel Moolenaar 		while (!uart_rx_empty(sc) && !sc->sc_isquelch) {
3130acb3c4aSMarcel Moolenaar 			xc = uart_rx_peek(sc);
31427d5dc18SMarcel Moolenaar 			c = xc & 0xff;
31527d5dc18SMarcel Moolenaar 			if (xc & UART_STAT_FRAMERR)
316bc093719SEd Schouten 				err |= TRE_FRAMING;
317dd5b096fSMarcel Moolenaar 			if (xc & UART_STAT_OVERRUN)
318bc093719SEd Schouten 				err |= TRE_OVERRUN;
31927d5dc18SMarcel Moolenaar 			if (xc & UART_STAT_PARERR)
320bc093719SEd Schouten 				err |= TRE_PARITY;
3210acb3c4aSMarcel Moolenaar 			if (ttydisc_rint(tp, c, err) != 0) {
3220acb3c4aSMarcel Moolenaar 				sc->sc_isquelch = 1;
3230acb3c4aSMarcel Moolenaar 				if ((tp->t_termios.c_cflag & CRTS_IFLOW) &&
3240acb3c4aSMarcel Moolenaar 				    !sc->sc_hwiflow)
3250acb3c4aSMarcel Moolenaar 					UART_SETSIG(sc, SER_DRTS);
3260acb3c4aSMarcel Moolenaar 			} else
3270acb3c4aSMarcel Moolenaar 				uart_rx_next(sc);
32827d5dc18SMarcel Moolenaar 		}
32927d5dc18SMarcel Moolenaar 	}
33027d5dc18SMarcel Moolenaar 
331bc093719SEd Schouten 	if (pend & SER_INT_BREAK)
332bc093719SEd Schouten 		ttydisc_rint(tp, 0, TRE_BREAK);
33327d5dc18SMarcel Moolenaar 
3342d511805SMarcel Moolenaar 	if (pend & SER_INT_SIGCHG) {
3352d511805SMarcel Moolenaar 		sig = pend & SER_INT_SIGMASK;
33628710806SPoul-Henning Kamp 		if (sig & SER_DDCD)
337bc093719SEd Schouten 			ttydisc_modem(tp, sig & SER_DCD);
338f1fb9647SMarcel Moolenaar 		if (sig & SER_DCTS)
339bc093719SEd Schouten 			uart_tty_outwakeup(tp);
34027d5dc18SMarcel Moolenaar 	}
34127d5dc18SMarcel Moolenaar 
342bc093719SEd Schouten 	if (pend & SER_INT_TXIDLE)
343bc093719SEd Schouten 		uart_tty_outwakeup(tp);
344bc093719SEd Schouten 	ttydisc_rint_done(tp);
345bc093719SEd Schouten 	tty_unlock(tp);
34627d5dc18SMarcel Moolenaar }
347bc093719SEd Schouten 
3489b866e4eSEd Schouten static void
3499b866e4eSEd Schouten uart_tty_free(void *arg)
3509b866e4eSEd Schouten {
3519b866e4eSEd Schouten 
3529b866e4eSEd Schouten 	/*
3539b866e4eSEd Schouten 	 * XXX: uart(4) could reuse the device unit number before it is
3549b866e4eSEd Schouten 	 * being freed by the TTY layer. We should use this hook to free
3559b866e4eSEd Schouten 	 * the device unit number, but unfortunately newbus does not
3569b866e4eSEd Schouten 	 * seem to support such a construct.
3579b866e4eSEd Schouten 	 */
3589b866e4eSEd Schouten }
3599b866e4eSEd Schouten 
360bc093719SEd Schouten static struct ttydevsw uart_tty_class = {
361bc093719SEd Schouten 	.tsw_flags	= TF_INITLOCK|TF_CALLOUT,
362bc093719SEd Schouten 	.tsw_open	= uart_tty_open,
363bc093719SEd Schouten 	.tsw_close	= uart_tty_close,
364bc093719SEd Schouten 	.tsw_outwakeup	= uart_tty_outwakeup,
3650acb3c4aSMarcel Moolenaar 	.tsw_inwakeup	= uart_tty_inwakeup,
366bc093719SEd Schouten 	.tsw_ioctl	= uart_tty_ioctl,
367bc093719SEd Schouten 	.tsw_param	= uart_tty_param,
368bc093719SEd Schouten 	.tsw_modem	= uart_tty_modem,
3699b866e4eSEd Schouten 	.tsw_free	= uart_tty_free,
370bc093719SEd Schouten };
37127d5dc18SMarcel Moolenaar 
37227d5dc18SMarcel Moolenaar int
37327d5dc18SMarcel Moolenaar uart_tty_attach(struct uart_softc *sc)
37427d5dc18SMarcel Moolenaar {
37527d5dc18SMarcel Moolenaar 	struct tty *tp;
37679a8d927SPoul-Henning Kamp 	int unit;
37727d5dc18SMarcel Moolenaar 
378c5e30cc0SEd Schouten 	sc->sc_u.u_tty.tp = tp = tty_alloc(&uart_tty_class, sc);
37927d5dc18SMarcel Moolenaar 
38079a8d927SPoul-Henning Kamp 	unit = device_get_unit(sc->sc_dev);
38127d5dc18SMarcel Moolenaar 
38227d5dc18SMarcel Moolenaar 	if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
38312d984b6SMarcel Moolenaar 		sprintf(((struct consdev *)sc->sc_sysdev->cookie)->cn_name,
38479a8d927SPoul-Henning Kamp 		    "ttyu%r", unit);
385bc093719SEd Schouten 		tty_init_console(tp, 0);
38627d5dc18SMarcel Moolenaar 	}
38727d5dc18SMarcel Moolenaar 
388e0f66ef8SJohn Baldwin 	swi_add(&tty_intr_event, uart_driver_name, uart_tty_intr, sc, SWI_TTY,
38927d5dc18SMarcel Moolenaar 	    INTR_TYPE_TTY, &sc->sc_softih);
39027d5dc18SMarcel Moolenaar 
391bc093719SEd Schouten 	tty_makedev(tp, NULL, "u%r", unit);
39279a8d927SPoul-Henning Kamp 
39327d5dc18SMarcel Moolenaar 	return (0);
39427d5dc18SMarcel Moolenaar }
39527d5dc18SMarcel Moolenaar 
3967d376cbcSAlexander Kabaev int
3977d376cbcSAlexander Kabaev uart_tty_detach(struct uart_softc *sc)
39827d5dc18SMarcel Moolenaar {
39979a8d927SPoul-Henning Kamp 	struct tty *tp;
40027d5dc18SMarcel Moolenaar 
40179a8d927SPoul-Henning Kamp 	tp = sc->sc_u.u_tty.tp;
402bc093719SEd Schouten 
403bc093719SEd Schouten 	tty_lock(tp);
404284b6708SJohn Baldwin 	swi_remove(sc->sc_softih);
405bc093719SEd Schouten 	tty_rel_gone(tp);
40627d5dc18SMarcel Moolenaar 
40727d5dc18SMarcel Moolenaar 	return (0);
40827d5dc18SMarcel Moolenaar }
409