2 * Copyright (c) 2003 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
35 #include <sys/fcntl.h>
36 #include <sys/interrupt.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/reboot.h>
40 #include <machine/bus.h>
43 #include <machine/resource.h>
44 #include <machine/stdarg.h>
46 #include <dev/uart/uart.h>
47 #include <dev/uart/uart_bus.h>
48 #include <dev/uart/uart_cpu.h>
52 static cn_probe_t uart_cnprobe;
53 static cn_init_t uart_cninit;
54 static cn_term_t uart_cnterm;
55 static cn_getc_t uart_cngetc;
56 static cn_putc_t uart_cnputc;
57 static cn_grab_t uart_cngrab;
58 static cn_ungrab_t uart_cnungrab;
62 static struct uart_devinfo uart_console;
65 uart_cnprobe(struct consdev *cp)
70 KASSERT(uart_console.cookie == NULL, ("foo"));
72 if (uart_cpu_getdev(UART_DEV_CONSOLE, &uart_console))
75 if (uart_probe(&uart_console))
78 strlcpy(cp->cn_name, uart_driver_name, sizeof(cp->cn_name));
79 cp->cn_pri = (boothowto & RB_SERIAL) ? CN_REMOTE : CN_NORMAL;
80 cp->cn_arg = &uart_console;
84 uart_cninit(struct consdev *cp)
86 struct uart_devinfo *di;
89 * Yedi trick: we need to be able to define cn_dev before we go
90 * single- or multi-user. The problem is that we don't know at
91 * this time what the device will be. Hence, we need to link from
92 * the uart_devinfo to the consdev that corresponds to it so that
93 * we can define cn_dev in uart_bus_attach() when we find the
94 * device during bus enumeration. That's when we'll know what the
95 * the unit number will be.
98 KASSERT(di->cookie == NULL, ("foo"));
100 di->type = UART_DEV_CONSOLE;
106 uart_cnterm(struct consdev *cp)
109 uart_term(cp->cn_arg);
113 uart_cngrab(struct consdev *cp)
116 uart_grab(cp->cn_arg);
120 uart_cnungrab(struct consdev *cp)
123 uart_ungrab(cp->cn_arg);
127 uart_cnputc(struct consdev *cp, int c)
130 uart_putc(cp->cn_arg, c);
134 uart_cngetc(struct consdev *cp)
137 return (uart_poll(cp->cn_arg));
141 uart_tty_open(struct tty *tp)
143 struct uart_softc *sc;
147 if (sc == NULL || sc->sc_leaving)
155 uart_tty_close(struct tty *tp)
157 struct uart_softc *sc;
160 if (sc == NULL || sc->sc_leaving || !sc->sc_opened)
164 UART_IOCTL(sc, UART_IOCTL_IFLOW, 0);
166 UART_IOCTL(sc, UART_IOCTL_OFLOW, 0);
167 if (sc->sc_sysdev == NULL)
168 UART_SETSIG(sc, SER_DDTR | SER_DRTS);
176 uart_tty_outwakeup(struct tty *tp)
178 struct uart_softc *sc;
181 if (sc == NULL || sc->sc_leaving)
188 * Respect RTS/CTS (output) flow control if enabled and not already
189 * handled by hardware.
191 if ((tp->t_termios.c_cflag & CCTS_OFLOW) && !sc->sc_hwoflow &&
192 !(sc->sc_hwsig & SER_CTS))
195 sc->sc_txdatasz = ttydisc_getc(tp, sc->sc_txbuf, sc->sc_txfifosz);
196 if (sc->sc_txdatasz != 0)
201 uart_tty_inwakeup(struct tty *tp)
203 struct uart_softc *sc;
206 if (sc == NULL || sc->sc_leaving)
209 if (sc->sc_isquelch) {
210 if ((tp->t_termios.c_cflag & CRTS_IFLOW) && !sc->sc_hwiflow)
211 UART_SETSIG(sc, SER_DRTS|SER_RTS);
213 uart_sched_softih(sc, SER_INT_RXREADY);
218 uart_tty_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
220 struct uart_softc *sc;
226 UART_IOCTL(sc, UART_IOCTL_BREAK, 1);
229 UART_IOCTL(sc, UART_IOCTL_BREAK, 0);
232 return pps_ioctl(cmd, data, &sc->sc_pps);
237 uart_tty_param(struct tty *tp, struct termios *t)
239 struct uart_softc *sc;
240 int databits, parity, stopbits;
243 if (sc == NULL || sc->sc_leaving)
245 if (t->c_ispeed != t->c_ospeed && t->c_ospeed != 0)
247 /* Fixate certain parameters for system devices. */
248 if (sc->sc_sysdev != NULL) {
249 t->c_ispeed = t->c_ospeed = sc->sc_sysdev->baudrate;
250 t->c_cflag |= CLOCAL;
251 t->c_cflag &= ~HUPCL;
253 if (t->c_ospeed == 0) {
254 UART_SETSIG(sc, SER_DDTR | SER_DRTS);
257 switch (t->c_cflag & CSIZE) {
258 case CS5: databits = 5; break;
259 case CS6: databits = 6; break;
260 case CS7: databits = 7; break;
261 default: databits = 8; break;
263 stopbits = (t->c_cflag & CSTOPB) ? 2 : 1;
264 if (t->c_cflag & PARENB)
265 parity = (t->c_cflag & PARODD) ? UART_PARITY_ODD
268 parity = UART_PARITY_NONE;
269 if (UART_PARAM(sc, t->c_ospeed, databits, stopbits, parity) != 0)
271 UART_SETSIG(sc, SER_DDTR | SER_DTR);
272 /* Set input flow control state. */
273 if (!sc->sc_hwiflow) {
274 if ((t->c_cflag & CRTS_IFLOW) && sc->sc_isquelch)
275 UART_SETSIG(sc, SER_DRTS);
277 UART_SETSIG(sc, SER_DRTS | SER_RTS);
279 UART_IOCTL(sc, UART_IOCTL_IFLOW, (t->c_cflag & CRTS_IFLOW));
280 /* Set output flow control state. */
282 UART_IOCTL(sc, UART_IOCTL_OFLOW, (t->c_cflag & CCTS_OFLOW));
288 uart_tty_modem(struct tty *tp, int biton, int bitoff)
290 struct uart_softc *sc;
293 if (biton != 0 || bitoff != 0)
294 UART_SETSIG(sc, SER_DELTA(bitoff|biton) | biton);
295 return (sc->sc_hwsig);
299 uart_tty_intr(void *arg)
301 struct uart_softc *sc = arg;
303 int c, err = 0, pend, sig, xc;
308 pend = atomic_readandclear_32(&sc->sc_ttypend);
309 if (!(pend & SER_INT_MASK))
312 tp = sc->sc_u.u_tty.tp;
315 if (pend & SER_INT_RXREADY) {
316 while (!uart_rx_empty(sc) && !sc->sc_isquelch) {
317 xc = uart_rx_peek(sc);
319 if (xc & UART_STAT_FRAMERR)
321 if (xc & UART_STAT_OVERRUN)
323 if (xc & UART_STAT_PARERR)
325 if (ttydisc_rint(tp, c, err) != 0) {
327 if ((tp->t_termios.c_cflag & CRTS_IFLOW) &&
329 UART_SETSIG(sc, SER_DRTS);
335 if (pend & SER_INT_BREAK)
336 ttydisc_rint(tp, 0, TRE_BREAK);
338 if (pend & SER_INT_SIGCHG) {
339 sig = pend & SER_INT_SIGMASK;
341 ttydisc_modem(tp, sig & SER_DCD);
343 uart_tty_outwakeup(tp);
346 if (pend & SER_INT_TXIDLE)
347 uart_tty_outwakeup(tp);
348 ttydisc_rint_done(tp);
353 uart_tty_free(void *arg)
357 * XXX: uart(4) could reuse the device unit number before it is
358 * being freed by the TTY layer. We should use this hook to free
359 * the device unit number, but unfortunately newbus does not
360 * seem to support such a construct.
364 static struct ttydevsw uart_tty_class = {
365 .tsw_flags = TF_INITLOCK|TF_CALLOUT,
366 .tsw_open = uart_tty_open,
367 .tsw_close = uart_tty_close,
368 .tsw_outwakeup = uart_tty_outwakeup,
369 .tsw_inwakeup = uart_tty_inwakeup,
370 .tsw_ioctl = uart_tty_ioctl,
371 .tsw_param = uart_tty_param,
372 .tsw_modem = uart_tty_modem,
373 .tsw_free = uart_tty_free,
377 uart_tty_attach(struct uart_softc *sc)
382 sc->sc_u.u_tty.tp = tp = tty_alloc(&uart_tty_class, sc);
384 unit = device_get_unit(sc->sc_dev);
386 if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
387 sprintf(((struct consdev *)sc->sc_sysdev->cookie)->cn_name,
389 tty_init_console(tp, 0);
392 swi_add(&tty_intr_event, uart_driver_name, uart_tty_intr, sc, SWI_TTY,
393 INTR_TYPE_TTY, &sc->sc_softih);
395 tty_makedev(tp, NULL, "u%r", unit);
401 uart_tty_detach(struct uart_softc *sc)
405 tp = sc->sc_u.u_tty.tp;
408 swi_remove(sc->sc_softih);