NetBSD/sys/arch/sparc64/dev/pcons.c

337 lines
7.3 KiB
C

/* $NetBSD: pcons.c,v 1.8 2001/10/05 21:53:56 eeh Exp $ */
/*-
* Copyright (c) 2000 Eduardo E. Horvath
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*/
/*
* Default console driver. Uses the PROM or whatever
* driver(s) are appropriate.
*/
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/time.h>
#include <sys/syslog.h>
#include <machine/autoconf.h>
#include <machine/openfirm.h>
#include <machine/conf.h>
#include <machine/cpu.h>
#include <machine/eeprom.h>
#include <machine/psl.h>
#include <dev/cons.h>
#include <sparc64/dev/cons.h>
static int pconsmatch __P((struct device *, struct cfdata *, void *));
static void pconsattach __P((struct device *, struct device *, void *));
struct cfattach pcons_ca = {
sizeof(struct pconssoftc), pconsmatch, pconsattach
};
extern struct cfdriver pcons_cd;
static struct cnm_state pcons_cnm_state;
static int pconsprobe __P((void));
extern struct consdev *cn_tab;
static int
pconsmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct mainbus_attach_args *ma = aux;
extern int prom_cngetc __P((dev_t));
/* Only attach if no other console has attached. */
return ((strcmp("pcons", ma->ma_name) == 0) &&
(cn_tab->cn_getc == prom_cngetc));
}
static void
pconsattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pconssoftc *sc = (struct pconssoftc *) self;
printf("\n");
if (!pconsprobe())
return;
cn_init_magic(&pcons_cnm_state);
cn_set_magic("+++++");
callout_init(&sc->sc_poll_ch);
}
static void pconsstart __P((struct tty *));
static int pconsparam __P((struct tty *, struct termios *));
static void pcons_poll __P((void *));
int
pconsopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct pconssoftc *sc;
int unit = minor(dev);
struct tty *tp;
if (unit >= pcons_cd.cd_ndevs)
return ENXIO;
sc = pcons_cd.cd_devs[unit];
if (!sc)
return ENXIO;
if (!(tp = sc->of_tty))
sc->of_tty = tp = ttymalloc();
tp->t_oproc = pconsstart;
tp->t_param = pconsparam;
tp->t_dev = dev;
cn_tab->cn_dev = dev;
if (!(tp->t_state & TS_ISOPEN)) {
ttychars(tp);
tp->t_iflag = TTYDEF_IFLAG;
tp->t_oflag = TTYDEF_OFLAG;
tp->t_cflag = TTYDEF_CFLAG;
tp->t_lflag = TTYDEF_LFLAG;
tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
pconsparam(tp, &tp->t_termios);
ttsetwater(tp);
} else if ((tp->t_state&TS_XCLUDE) && suser(p->p_ucred, &p->p_acflag))
return EBUSY;
tp->t_state |= TS_CARR_ON;
if (!(sc->of_flags & OFPOLL)) {
sc->of_flags |= OFPOLL;
callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc);
}
return (*tp->t_linesw->l_open)(dev, tp);
}
int
pconsclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
callout_stop(&sc->sc_poll_ch);
sc->of_flags &= ~OFPOLL;
(*tp->t_linesw->l_close)(tp, flag);
ttyclose(tp);
return 0;
}
int
pconsread(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
return (*tp->t_linesw->l_read)(tp, uio, flag);
}
int
pconswrite(dev, uio, flag)
dev_t dev;
struct uio *uio;
int flag;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
return (*tp->t_linesw->l_write)(tp, uio, flag);
}
int
pconspoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
return ((*tp->t_linesw->l_poll)(tp, events, p));
}
int
pconsioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
struct tty *tp = sc->of_tty;
int error;
if ((error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p)) >= 0)
return error;
if ((error = ttioctl(tp, cmd, data, flag, p)) >= 0)
return error;
return ENOTTY;
}
struct tty *
pconstty(dev)
dev_t dev;
{
struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
return sc->of_tty;
}
void
pconsstop(tp, flag)
struct tty *tp;
int flag;
{
}
static void
pconsstart(tp)
struct tty *tp;
{
struct clist *cl;
int s, len;
u_char buf[OFBURSTLEN];
s = spltty();
if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
splx(s);
return;
}
tp->t_state |= TS_BUSY;
splx(s);
cl = &tp->t_outq;
len = q_to_b(cl, buf, OFBURSTLEN);
OF_write(stdout, buf, len);
s = spltty();
tp->t_state &= ~TS_BUSY;
if (cl->c_cc) {
tp->t_state |= TS_TIMEOUT;
callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp);
}
if (cl->c_cc <= tp->t_lowat) {
if (tp->t_state & TS_ASLEEP) {
tp->t_state &= ~TS_ASLEEP;
wakeup(cl);
}
selwakeup(&tp->t_wsel);
}
splx(s);
}
static int
pconsparam(tp, t)
struct tty *tp;
struct termios *t;
{
tp->t_ispeed = t->c_ispeed;
tp->t_ospeed = t->c_ospeed;
tp->t_cflag = t->c_cflag;
return 0;
}
static void
pcons_poll(aux)
void *aux;
{
struct pconssoftc *sc = aux;
struct tty *tp = sc->of_tty;
char ch;
while (OF_read(stdin, &ch, 1) > 0) {
cn_check_magic(tp->t_dev, ch, pcons_cnm_state);
if (tp && (tp->t_state & TS_ISOPEN))
(*tp->t_linesw->l_rint)(ch, tp);
}
callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc);
}
int
pconsprobe()
{
if (!stdin) stdin = OF_stdin();
if (!stdout) stdout = OF_stdout();
return (stdin && stdout);
}
void
pcons_cnpollc(dev, on)
dev_t dev;
int on;
{
struct pconssoftc *sc = NULL;
if (pcons_cd.cd_devs)
sc = pcons_cd.cd_devs[minor(dev)];
if (on) {
if (!sc) return;
if (sc->of_flags & OFPOLL)
callout_stop(&sc->sc_poll_ch);
sc->of_flags &= ~OFPOLL;
} else {
/* Resuming kernel. */
if (sc && !(sc->of_flags & OFPOLL)) {
sc->of_flags |= OFPOLL;
callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc);
}
}
}
void pcons_dopoll __P((void));
void
pcons_dopoll() {
pcons_poll((void*)pcons_cd.cd_devs[0]);
}