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("$FreeBSD$");
31 #include <sys/param.h>
33 #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 tsw_open_t ofwtty_open;
52 static tsw_close_t ofwtty_close;
53 static tsw_outwakeup_t ofwtty_outwakeup;
55 static struct ttydevsw ofw_ttydevsw = {
56 .tsw_flags = TF_NOPREFIX,
57 .tsw_open = ofwtty_open,
58 .tsw_close = ofwtty_close,
59 .tsw_outwakeup = ofwtty_outwakeup,
63 static struct callout ofw_timer;
66 static int alt_break_state;
69 static void ofw_timeout(void *);
71 static cn_probe_t ofw_cnprobe;
72 static cn_init_t ofw_cninit;
73 static cn_term_t ofw_cnterm;
74 static cn_getc_t ofw_cngetc;
75 static cn_putc_t ofw_cnputc;
76 static cn_grab_t ofw_cngrab;
77 static cn_ungrab_t ofw_cnungrab;
82 cn_drvinit(void *unused)
88 if (ofw_consdev.cn_pri != CN_DEAD &&
89 ofw_consdev.cn_name[0] != '\0') {
90 tp = tty_alloc(&ofw_ttydevsw, NULL);
91 tty_makedev(tp, NULL, "%s", "ofwcons");
94 * XXX: This is a hack and it may result in two /dev/ttya
95 * XXX: devices on platforms where the sab driver works.
97 if ((options = OF_finddevice("/options")) == -1 ||
98 OF_getprop(options, "output-device", output,
99 sizeof(output)) == -1)
101 if (strlen(output) > 0)
102 tty_makealias(tp, "%s", output);
103 callout_init_mtx(&ofw_timer, tty_getlock(tp), 0);
107 SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL);
109 static pcell_t stdin;
110 static pcell_t stdout;
113 ofwtty_open(struct tty *tp)
115 polltime = hz / OFWCONS_POLL_HZ;
119 callout_reset(&ofw_timer, polltime, ofw_timeout, tp);
125 ofwtty_close(struct tty *tp)
128 callout_stop(&ofw_timer);
132 ofwtty_outwakeup(struct tty *tp)
135 u_char buf[OFBURSTLEN];
138 len = ttydisc_getc(tp, buf, sizeof buf);
141 OF_write(stdout, buf, len);
151 tp = (struct tty *)v;
153 tty_lock_assert(tp, MA_OWNED);
154 while ((c = ofw_cngetc(NULL)) != -1)
155 ttydisc_rint(tp, c, 0);
156 ttydisc_rint_done(tp);
158 callout_schedule(&ofw_timer, polltime);
162 ofw_cnprobe(struct consdev *cp)
166 if ((chosen = OF_finddevice("/chosen")) == -1) {
167 cp->cn_pri = CN_DEAD;
171 if (OF_getencprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
172 cp->cn_pri = CN_DEAD;
176 if (OF_getencprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
177 cp->cn_pri = CN_DEAD;
185 ofw_cninit(struct consdev *cp)
188 /* XXX: This is the alias, but that should be good enough */
189 strcpy(cp->cn_name, "ofwcons");
193 ofw_cnterm(struct consdev *cp)
198 ofw_cngrab(struct consdev *cp)
203 ofw_cnungrab(struct consdev *cp)
208 ofw_cngetc(struct consdev *cp)
212 if (OF_read(stdin, &ch, 1) > 0) {
214 kdb_alt_break(ch, &alt_break_state);
223 ofw_cnputc(struct consdev *cp, int c)
229 OF_write(stdout, &cbuf, 1);
233 OF_write(stdout, &cbuf, 1);