235 lines
4.9 KiB
C
235 lines
4.9 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* 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>
|
|
#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 ofw_timer;
|
|
|
|
#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') {
|
|
tp = tty_alloc(&ofw_ttydevsw, NULL);
|
|
tty_makedev(tp, NULL, "%s", "ofwcons");
|
|
|
|
/*
|
|
* XXX: This is a hack and it may result in two /dev/ttya
|
|
* XXX: devices on platforms where the sab driver works.
|
|
*/
|
|
if ((options = OF_finddevice("/options")) == -1 ||
|
|
OF_getprop(options, "output-device", output,
|
|
sizeof(output)) == -1)
|
|
return;
|
|
if (strlen(output) > 0)
|
|
tty_makealias(tp, "%s", output);
|
|
callout_init_mtx(&ofw_timer, tty_getlock(tp), 0);
|
|
}
|
|
}
|
|
|
|
SYSINIT(cndev, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE, cn_drvinit, NULL);
|
|
|
|
static pcell_t stdin;
|
|
static pcell_t stdout;
|
|
|
|
static int
|
|
ofwtty_open(struct tty *tp)
|
|
{
|
|
polltime = hz / OFWCONS_POLL_HZ;
|
|
if (polltime < 1)
|
|
polltime = 1;
|
|
|
|
callout_reset(&ofw_timer, polltime, ofw_timeout, tp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ofwtty_close(struct tty *tp)
|
|
{
|
|
|
|
callout_stop(&ofw_timer);
|
|
}
|
|
|
|
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_assert_locked(tp);
|
|
while ((c = ofw_cngetc(NULL)) != -1)
|
|
ttydisc_rint(tp, c, 0);
|
|
ttydisc_rint_done(tp);
|
|
|
|
callout_schedule(&ofw_timer, polltime);
|
|
}
|
|
|
|
static void
|
|
ofw_cnprobe(struct consdev *cp)
|
|
{
|
|
int chosen;
|
|
|
|
if ((chosen = OF_finddevice("/chosen")) == -1) {
|
|
cp->cn_pri = CN_DEAD;
|
|
return;
|
|
}
|
|
|
|
if (OF_getencprop(chosen, "stdin", &stdin, sizeof(stdin)) == -1) {
|
|
cp->cn_pri = CN_DEAD;
|
|
return;
|
|
}
|
|
|
|
if (OF_getencprop(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);
|
|
}
|