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>
36 #include <sys/systm.h>
37 #include <sys/types.h>
40 #include <sys/consio.h>
43 #include <dev/ofw/openfirm.h>
47 #ifndef OFWCONS_POLL_HZ
48 #define OFWCONS_POLL_HZ 4 /* 50-100 works best on Ultra2 */
50 #define OFBURSTLEN 128 /* max number of bytes to write in one chunk */
52 static d_open_t ofw_dev_open;
53 static d_close_t ofw_dev_close;
55 static struct cdevsw ofw_cdevsw = {
56 .d_version = D_VERSION,
57 .d_open = ofw_dev_open,
58 .d_close = ofw_dev_close,
60 .d_flags = D_TTY | D_NEEDGIANT,
63 static struct tty *ofw_tp = NULL;
65 static struct callout_handle ofw_timeouthandle
66 = CALLOUT_HANDLE_INITIALIZER(&ofw_timeouthandle);
68 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
69 static int alt_break_state;
72 static void ofw_tty_start(struct tty *);
73 static int ofw_tty_param(struct tty *, struct termios *);
74 static void ofw_tty_stop(struct tty *, int);
75 static void ofw_timeout(void *);
77 static cn_probe_t ofw_cnprobe;
78 static cn_init_t ofw_cninit;
79 static cn_term_t ofw_cnterm;
80 static cn_getc_t ofw_cngetc;
81 static cn_putc_t ofw_cnputc;
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) &&
145 priv_check(td, PRIV_TTY_EXCLUSIVE)) {
149 error = ttyld_open(tp, dev);
151 if (error == 0 && setuptimeout) {
152 polltime = hz / OFWCONS_POLL_HZ;
157 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
164 ofw_dev_close(struct cdev *dev, int flag, int mode, struct thread *td)
176 /* XXX Should be replaced with callout_stop(9) */
177 untimeout(ofw_timeout, tp, ofw_timeouthandle);
178 ttyld_close(tp, flag);
186 ofw_tty_param(struct tty *tp, struct termios *t)
193 ofw_tty_start(struct tty *tp)
197 u_char buf[OFBURSTLEN];
200 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
203 tp->t_state |= TS_BUSY;
205 len = q_to_b(cl, buf, OFBURSTLEN);
206 OF_write(stdout, buf, len);
207 tp->t_state &= ~TS_BUSY;
213 ofw_tty_stop(struct tty *tp, int flag)
216 if (tp->t_state & TS_BUSY) {
217 if ((tp->t_state & TS_TTSTOP) == 0) {
218 tp->t_state |= TS_FLUSH;
229 tp = (struct tty *)v;
231 while ((c = ofw_cngetc(NULL)) != -1) {
232 if (tp->t_state & TS_ISOPEN) {
237 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
241 ofw_cnprobe(struct consdev *cp)
245 if ((chosen = OF_finddevice("/chosen")) == -1) {
246 cp->cn_pri = CN_DEAD;
250 if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
251 cp->cn_pri = CN_DEAD;
255 if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
256 cp->cn_pri = CN_DEAD;
264 ofw_cninit(struct consdev *cp)
267 /* XXX: This is the alias, but that should be good enough */
268 sprintf(cp->cn_name, "ofwcons");
273 ofw_cnterm(struct consdev *cp)
278 ofw_cngetc(struct consdev *cp)
282 if (OF_read(stdin, &ch, 1) > 0) {
283 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
284 if (kdb_alt_break(ch, &alt_break_state))
285 kdb_enter_why(KDB_WHY_BREAK,
286 "Break sequence on console");
295 ofw_cnputc(struct consdev *cp, int c)
301 OF_write(stdout, &cbuf, 1);
305 OF_write(stdout, &cbuf, 1);