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_cnprobe;
77 static cn_init_t ofw_cninit;
78 static cn_term_t ofw_cnterm;
79 static cn_getc_t ofw_cngetc;
80 static cn_putc_t ofw_cnputc;
85 cn_drvinit(void *unused)
91 if (ofw_consdev.cn_pri != CN_DEAD &&
92 ofw_consdev.cn_name[0] != '\0') {
93 if ((options = OF_finddevice("/options")) == -1 ||
94 OF_getprop(options, "output-device", output,
95 sizeof(output)) == -1)
98 * XXX: This is a hack and it may result in two /dev/ttya
99 * XXX: devices on platforms where the sab driver works.
101 dev = make_dev(&ofw_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "%s",
103 make_dev_alias(dev, "ofwcons");
107 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL)
113 ofw_dev_open(struct cdev *dev, int flag, int mode, struct thread *td)
117 int error, setuptimeout;
124 * XXX: BAD, should happen at attach time
126 if (dev->si_tty == NULL) {
128 dev->si_tty = ofw_tp;
133 tp->t_oproc = ofw_tty_start;
134 tp->t_param = ofw_tty_param;
135 tp->t_stop = ofw_tty_stop;
138 if ((tp->t_state & TS_ISOPEN) == 0) {
139 tp->t_state |= TS_CARR_ON;
140 ttyconsolemode(tp, 0);
143 } else if ((tp->t_state & TS_XCLUDE) && suser(td)) {
147 error = ttyld_open(tp, dev);
149 if (error == 0 && setuptimeout) {
150 polltime = hz / OFWCONS_POLL_HZ;
155 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
162 ofw_dev_close(struct cdev *dev, int flag, int mode, struct thread *td)
174 /* XXX Should be replaced with callout_stop(9) */
175 untimeout(ofw_timeout, tp, ofw_timeouthandle);
176 ttyld_close(tp, flag);
184 ofw_tty_param(struct tty *tp, struct termios *t)
191 ofw_tty_start(struct tty *tp)
195 u_char buf[OFBURSTLEN];
198 if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP))
201 tp->t_state |= TS_BUSY;
203 len = q_to_b(cl, buf, OFBURSTLEN);
204 OF_write(stdout, buf, len);
205 tp->t_state &= ~TS_BUSY;
211 ofw_tty_stop(struct tty *tp, int flag)
214 if (tp->t_state & TS_BUSY) {
215 if ((tp->t_state & TS_TTSTOP) == 0) {
216 tp->t_state |= TS_FLUSH;
227 tp = (struct tty *)v;
229 while ((c = ofw_cngetc(NULL)) != -1) {
230 if (tp->t_state & TS_ISOPEN) {
235 ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
239 ofw_cnprobe(struct consdev *cp)
243 if ((chosen = OF_finddevice("/chosen")) == -1) {
244 cp->cn_pri = CN_DEAD;
248 if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
249 cp->cn_pri = CN_DEAD;
253 if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
254 cp->cn_pri = CN_DEAD;
262 ofw_cninit(struct consdev *cp)
265 /* XXX: This is the alias, but that should be good enough */
266 sprintf(cp->cn_name, "ofwcons");
271 ofw_cnterm(struct consdev *cp)
276 ofw_cngetc(struct consdev *cp)
280 if (OF_read(stdin, &ch, 1) > 0) {
281 #if defined(KDB) && defined(ALT_BREAK_TO_DEBUGGER)
282 if (kdb_alt_break(ch, &alt_break_state))
283 kdb_enter("Break sequence on console");
292 ofw_cnputc(struct consdev *cp, int c)
298 OF_write(stdout, &cbuf, 1);
302 OF_write(stdout, &cbuf, 1);