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)
118 uart_cnungrab(struct consdev *cp)
123 uart_cnputc(struct consdev *cp, int c)
126 uart_putc(cp->cn_arg, c);
130 uart_cngetc(struct consdev *cp)
133 return (uart_poll(cp->cn_arg));
137 uart_tty_open(struct tty *tp)
139 struct uart_softc *sc;
143 if (sc == NULL || sc->sc_leaving)
151 uart_tty_close(struct tty *tp)
153 struct uart_softc *sc;
156 if (sc == NULL || sc->sc_leaving || !sc->sc_opened)
160 UART_IOCTL(sc, UART_IOCTL_IFLOW, 0);
162 UART_IOCTL(sc, UART_IOCTL_OFLOW, 0);
163 if (sc->sc_sysdev == NULL)
164 UART_SETSIG(sc, SER_DDTR | SER_DRTS);
172 uart_tty_outwakeup(struct tty *tp)
174 struct uart_softc *sc;
177 if (sc == NULL || sc->sc_leaving)
184 * Respect RTS/CTS (output) flow control if enabled and not already
185 * handled by hardware.
187 if ((tp->t_termios.c_cflag & CCTS_OFLOW) && !sc->sc_hwoflow &&
188 !(sc->sc_hwsig & SER_CTS))
191 sc->sc_txdatasz = ttydisc_getc(tp, sc->sc_txbuf, sc->sc_txfifosz);
192 if (sc->sc_txdatasz != 0)
197 uart_tty_inwakeup(struct tty *tp)
199 struct uart_softc *sc;
202 if (sc == NULL || sc->sc_leaving)
205 if (sc->sc_isquelch) {
206 if ((tp->t_termios.c_cflag & CRTS_IFLOW) && !sc->sc_hwiflow)
207 UART_SETSIG(sc, SER_DRTS|SER_RTS);
209 uart_sched_softih(sc, SER_INT_RXREADY);
214 uart_tty_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
216 struct uart_softc *sc;
222 UART_IOCTL(sc, UART_IOCTL_BREAK, 1);
225 UART_IOCTL(sc, UART_IOCTL_BREAK, 0);
228 return pps_ioctl(cmd, data, &sc->sc_pps);
233 uart_tty_param(struct tty *tp, struct termios *t)
235 struct uart_softc *sc;
236 int databits, parity, stopbits;
239 if (sc == NULL || sc->sc_leaving)
241 if (t->c_ispeed != t->c_ospeed && t->c_ospeed != 0)
243 /* Fixate certain parameters for system devices. */
244 if (sc->sc_sysdev != NULL) {
245 t->c_ispeed = t->c_ospeed = sc->sc_sysdev->baudrate;
246 t->c_cflag |= CLOCAL;
247 t->c_cflag &= ~HUPCL;
249 if (t->c_ospeed == 0) {
250 UART_SETSIG(sc, SER_DDTR | SER_DRTS);
253 switch (t->c_cflag & CSIZE) {
254 case CS5: databits = 5; break;
255 case CS6: databits = 6; break;
256 case CS7: databits = 7; break;
257 default: databits = 8; break;
259 stopbits = (t->c_cflag & CSTOPB) ? 2 : 1;
260 if (t->c_cflag & PARENB)
261 parity = (t->c_cflag & PARODD) ? UART_PARITY_ODD
264 parity = UART_PARITY_NONE;
265 if (UART_PARAM(sc, t->c_ospeed, databits, stopbits, parity) != 0)
267 UART_SETSIG(sc, SER_DDTR | SER_DTR);
268 /* Set input flow control state. */
269 if (!sc->sc_hwiflow) {
270 if ((t->c_cflag & CRTS_IFLOW) && sc->sc_isquelch)
271 UART_SETSIG(sc, SER_DRTS);
273 UART_SETSIG(sc, SER_DRTS | SER_RTS);
275 UART_IOCTL(sc, UART_IOCTL_IFLOW, (t->c_cflag & CRTS_IFLOW));
276 /* Set output flow control state. */
278 UART_IOCTL(sc, UART_IOCTL_OFLOW, (t->c_cflag & CCTS_OFLOW));
284 uart_tty_modem(struct tty *tp, int biton, int bitoff)
286 struct uart_softc *sc;
289 if (biton != 0 || bitoff != 0)
290 UART_SETSIG(sc, SER_DELTA(bitoff|biton) | biton);
291 return (sc->sc_hwsig);
295 uart_tty_intr(void *arg)
297 struct uart_softc *sc = arg;
299 int c, err = 0, pend, sig, xc;
304 pend = atomic_readandclear_32(&sc->sc_ttypend);
305 if (!(pend & SER_INT_MASK))
308 tp = sc->sc_u.u_tty.tp;
311 if (pend & SER_INT_RXREADY) {
312 while (!uart_rx_empty(sc) && !sc->sc_isquelch) {
313 xc = uart_rx_peek(sc);
315 if (xc & UART_STAT_FRAMERR)
317 if (xc & UART_STAT_OVERRUN)
319 if (xc & UART_STAT_PARERR)
321 if (ttydisc_rint(tp, c, err) != 0) {
323 if ((tp->t_termios.c_cflag & CRTS_IFLOW) &&
325 UART_SETSIG(sc, SER_DRTS);
331 if (pend & SER_INT_BREAK)
332 ttydisc_rint(tp, 0, TRE_BREAK);
334 if (pend & SER_INT_SIGCHG) {
335 sig = pend & SER_INT_SIGMASK;
337 ttydisc_modem(tp, sig & SER_DCD);
339 uart_tty_outwakeup(tp);
342 if (pend & SER_INT_TXIDLE)
343 uart_tty_outwakeup(tp);
344 ttydisc_rint_done(tp);
349 uart_tty_free(void *arg)
353 * XXX: uart(4) could reuse the device unit number before it is
354 * being freed by the TTY layer. We should use this hook to free
355 * the device unit number, but unfortunately newbus does not
356 * seem to support such a construct.
360 static struct ttydevsw uart_tty_class = {
361 .tsw_flags = TF_INITLOCK|TF_CALLOUT,
362 .tsw_open = uart_tty_open,
363 .tsw_close = uart_tty_close,
364 .tsw_outwakeup = uart_tty_outwakeup,
365 .tsw_inwakeup = uart_tty_inwakeup,
366 .tsw_ioctl = uart_tty_ioctl,
367 .tsw_param = uart_tty_param,
368 .tsw_modem = uart_tty_modem,
369 .tsw_free = uart_tty_free,
373 uart_tty_attach(struct uart_softc *sc)
378 sc->sc_u.u_tty.tp = tp = tty_alloc(&uart_tty_class, sc);
380 unit = device_get_unit(sc->sc_dev);
382 if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
383 sprintf(((struct consdev *)sc->sc_sysdev->cookie)->cn_name,
385 tty_init_console(tp, 0);
388 swi_add(&tty_intr_event, uart_driver_name, uart_tty_intr, sc, SWI_TTY,
389 INTR_TYPE_TTY, &sc->sc_softih);
391 tty_makedev(tp, NULL, "u%r", unit);
397 uart_tty_detach(struct uart_softc *sc)
401 tp = sc->sc_u.u_tty.tp;
404 swi_remove(sc->sc_softih);