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/*-
* Copyright (C) 2001 Benno Rice.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_ofw.h"
#include <sys/param.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/priv.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/conf.h>
#include <sys/cons.h>
#include <sys/consio.h>
#include <sys/tty.h>
#include <dev/ofw/openfirm.h>
#include <ddb/ddb.h>
#ifndef OFWCONS_POLL_HZ
#define OFWCONS_POLL_HZ 4 /* 50-100 works best on Ultra2 */
#endif
#define OFBURSTLEN 128 /* max number of bytes to write in one chunk */
static tsw_open_t ofwtty_open;
static tsw_close_t ofwtty_close;
static tsw_outwakeup_t ofwtty_outwakeup;
static struct ttydevsw ofw_ttydevsw = {
.tsw_flags = TF_NOPREFIX,
.tsw_open = ofwtty_open,
.tsw_close = ofwtty_close,
.tsw_outwakeup = ofwtty_outwakeup,
};
static int polltime;
static struct callout_handle ofw_timeouthandle
= CALLOUT_HANDLE_INITIALIZER(&ofw_timeouthandle);
#if defined(KDB)
static int alt_break_state;
#endif
static void ofw_timeout(void *);
static cn_probe_t ofw_cnprobe;
static cn_init_t ofw_cninit;
static cn_term_t ofw_cnterm;
static cn_getc_t ofw_cngetc;
static cn_putc_t ofw_cnputc;
static cn_grab_t ofw_cngrab;
static cn_ungrab_t ofw_cnungrab;
CONSOLE_DRIVER(ofw);
static void
cn_drvinit(void *unused)
{
phandle_t options;
char output[32];
struct tty *tp;
if (ofw_consdev.cn_pri != CN_DEAD &&
ofw_consdev.cn_name[0] != '\0') {
if ((options = OF_finddevice("/options")) == -1 ||
OF_getprop(options, "output-device", output,
sizeof(output)) == -1)
return;
/*
* XXX: This is a hack and it may result in two /dev/ttya
* XXX: devices on platforms where the sab driver works.
*/
tp = tty_alloc(&ofw_ttydevsw, NULL);
tty_makedev(tp, NULL, "%s", output);
tty_makealias(tp, "ofwcons");
}
}
SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL);
static int stdin;
static int stdout;
static int
ofwtty_open(struct tty *tp)
{
polltime = hz / OFWCONS_POLL_HZ;
if (polltime < 1)
polltime = 1;
ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
return (0);
}
static void
ofwtty_close(struct tty *tp)
{
/* XXX Should be replaced with callout_stop(9) */
untimeout(ofw_timeout, tp, ofw_timeouthandle);
}
static void
ofwtty_outwakeup(struct tty *tp)
{
int len;
u_char buf[OFBURSTLEN];
for (;;) {
len = ttydisc_getc(tp, buf, sizeof buf);
if (len == 0)
break;
OF_write(stdout, buf, len);
}
}
static void
ofw_timeout(void *v)
{
struct tty *tp;
int c;
tp = (struct tty *)v;
tty_lock(tp);
while ((c = ofw_cngetc(NULL)) != -1)
ttydisc_rint(tp, c, 0);
ttydisc_rint_done(tp);
tty_unlock(tp);
ofw_timeouthandle = timeout(ofw_timeout, tp, polltime);
}
static void
ofw_cnprobe(struct consdev *cp)
{
int chosen;
if ((chosen = OF_finddevice("/chosen")) == -1) {
cp->cn_pri = CN_DEAD;
return;
}
if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
cp->cn_pri = CN_DEAD;
return;
}
if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) == -1) {
cp->cn_pri = CN_DEAD;
return;
}
cp->cn_pri = CN_LOW;
}
static void
ofw_cninit(struct consdev *cp)
{
/* XXX: This is the alias, but that should be good enough */
strcpy(cp->cn_name, "ofwcons");
}
static void
ofw_cnterm(struct consdev *cp)
{
}
static void
ofw_cngrab(struct consdev *cp)
{
}
static void
ofw_cnungrab(struct consdev *cp)
{
}
static int
ofw_cngetc(struct consdev *cp)
{
unsigned char ch;
if (OF_read(stdin, &ch, 1) > 0) {
#if defined(KDB)
kdb_alt_break(ch, &alt_break_state);
#endif
return (ch);
}
return (-1);
}
static void
ofw_cnputc(struct consdev *cp, int c)
{
char cbuf;
if (c == '\n') {
cbuf = '\r';
OF_write(stdout, &cbuf, 1);
}
cbuf = c;
OF_write(stdout, &cbuf, 1);
}
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