2 * Copyright (C) 2001 Benno Rice.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include "opt_comconsole.h"
32 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/systm.h>
36 #include <sys/types.h>
39 #include <sys/consio.h>
42 #include <dev/ofw/openfirm.h>
46 #ifndef OFWCONS_POLL_HZ
47 #define OFWCONS_POLL_HZ 4 /* 50-100 works best on Ultra2 */
49 #define OFBURSTLEN 128 /* max number of bytes to write in one chunk */
51 static d_open_t ofw_dev_open;
52 static d_close_t ofw_dev_close;
54 static struct cdevsw ofw_cdevsw = {
55 .d_version = D_VERSION,
56 .d_open = ofw_dev_open,
57 .d_close = ofw_dev_close,
59 .d_flags = D_TTY | D_NEEDGIANT,
62 static struct tty *ofw_tp = NULL;
64 static struct callout_handle ofw_timeouthandle
65 = CALLOUT_HANDLE_INITIALIZER(&ofw_timeouthandle);
67 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
68 static int alt_break_state;
71 static void ofw_tty_start(struct tty *);
72 static int ofw_tty_param(struct tty *, struct termios *);
73 static void ofw_tty_stop(struct tty *, int);
74 static void ofw_timeout(void *);
76 static cn_probe_t ofw_cons_probe;
77 static cn_init_t ofw_cons_init;
78 static cn_getc_t ofw_cons_getc;
79 static cn_checkc_t ofw_cons_checkc;
80 static cn_putc_t ofw_cons_putc;
82 CONS_DRIVER(ofw, ofw_cons_probe, ofw_cons_init, NULL, ofw_cons_getc,
83 ofw_cons_checkc, ofw_cons_putc, NULL);
86 cn_drvinit(void *unused)
92 if (ofw_consdev.cn_pri != CN_DEAD &&
93 ofw_consdev.cn_name[0] != '\0') {
94 if ((options = OF_finddevice("/options")) == -1 ||
95 OF_getprop(options, "output-device", output,
96 sizeof(output)) == -1)
99 * XXX: This is a hack and it may result in two /dev/ttya
100 * XXX: devices on platforms where the sab driver works.
102 dev = make_dev(&ofw_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "%s",
104 make_dev_alias(dev, "ofwcons");
108 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL)
114 ofw_dev_open(struct cdev *dev, int flag, int mode, struct thread *td)
118 int error, setuptimeout;
125 * XXX: BAD, should happen at attach time
127 if (dev->si_tty == NULL) {
129 dev->si_tty = ofw_tp;
134 tp->t_oproc = ofw_tty_start;
135 tp->t_param = ofw_tty_param;
136 tp->t_stop = ofw_tty_stop;
139 if ((tp->t_state & TS_ISOPEN) == 0) {
140 tp->t_state |= TS_CARR_ON;
141 ttyconsolemode(tp, 0);
144 } else if ((tp->t_state & TS_XCLUDE) && suser(td)) {
148 error = ttyld_open(tp, dev);
150 if (error == 0 && setuptimeout) {
151 polltime = hz / OFWCONS_POLL_HZ;
156 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
163 ofw_dev_close(struct cdev *dev, int flag, int mode, struct thread *td)
175 /* XXX Should be replaced with callout_stop(9) */
176 untimeout(ofw_timeout, tp, ofw_timeouthandle);
177 ttyld_close(tp, flag);
185 ofw_tty_param(struct tty *tp, struct termios *t)
192 ofw_tty_start(struct tty *tp)
196 u_char buf[OFBURSTLEN];
199 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
202 tp->t_state |= TS_BUSY;
204 len = q_to_b(cl, buf, OFBURSTLEN);
205 OF_write(stdout, buf, len);
206 tp->t_state &= ~TS_BUSY;
212 ofw_tty_stop(struct tty *tp, int flag)
215 if (tp->t_state & TS_BUSY) {
216 if ((tp->t_state & TS_TTSTOP) == 0) {
217 tp->t_state |= TS_FLUSH;
228 tp = (struct tty *)v;
230 while ((c = ofw_cons_checkc(NULL)) != -1) {
231 if (tp->t_state & TS_ISOPEN) {
236 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
240 ofw_cons_probe(struct consdev *cp)
244 if ((chosen = OF_finddevice("/chosen")) == -1) {
245 cp->cn_pri = CN_DEAD;
249 if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
250 cp->cn_pri = CN_DEAD;
254 if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
255 cp->cn_pri = CN_DEAD;
263 ofw_cons_init(struct consdev *cp)
266 /* XXX: This is the alias, but that should be good enough */
267 sprintf(cp->cn_name, "ofwcons");
272 ofw_cons_getc(struct consdev *cp)
279 while ((l = OF_read(stdin, &ch, 1)) != 1) {
280 if (l != -2 && l != 0) {
285 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
286 if (kdb_alt_break(ch, &alt_break_state))
287 kdb_enter("Break sequence on console");
294 ofw_cons_checkc(struct consdev *cp)
298 if (OF_read(stdin, &ch, 1) > 0) {
299 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
300 if (kdb_alt_break(ch, &alt_break_state))
301 kdb_enter("Break sequence on console");
310 ofw_cons_putc(struct consdev *cp, int c)
316 OF_write(stdout, &cbuf, 1);
320 OF_write(stdout, &cbuf, 1);