321 lines
7.0 KiB
C
321 lines
7.0 KiB
C
/* $NetBSD: pcons.c,v 1.2 2000/06/24 16:51:36 eeh Exp $ */
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/*-
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* Copyright (c) 2000 Eduardo E. Horvath
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Default console driver. Uses the PROM or whatever
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* driver(s) are appropriate.
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*/
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <sys/time.h>
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#include <sys/syslog.h>
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#include <machine/autoconf.h>
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#include <machine/openfirm.h>
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#include <machine/bsd_openprom.h>
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#include <machine/conf.h>
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#include <machine/cpu.h>
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#include <machine/eeprom.h>
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#include <machine/psl.h>
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#include <machine/z8530var.h>
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#include <dev/cons.h>
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#include <sparc64/dev/cons.h>
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static int pconsmatch __P((struct device *, struct cfdata *, void *));
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static void pconsattach __P((struct device *, struct device *, void *));
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struct cfattach pcons_ca = {
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sizeof(struct pconssoftc), pconsmatch, pconsattach
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};
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extern struct cfdriver pcons_cd;
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static int pconsprobe __P((void));
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static int
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pconsmatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct mainbus_attach_args *ma = aux;
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extern struct consdev *cn_tab;
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extern int prom_cngetc __P((dev_t));
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/* Only attach if no other console has attached. */
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return ((strcmp("pcons", ma->ma_name) == 0) &&
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(cn_tab->cn_getc == prom_cngetc));
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}
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static void
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pconsattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct pconssoftc *sc = (struct pconssoftc *) self;
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printf("\n");
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if (!pconsprobe())
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return;
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callout_init(&sc->sc_poll_ch);
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}
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static void pconsstart __P((struct tty *));
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static int pconsparam __P((struct tty *, struct termios *));
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static void pcons_poll __P((void *));
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int
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pconsopen(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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struct pconssoftc *sc;
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int unit = minor(dev);
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struct tty *tp;
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if (unit >= pcons_cd.cd_ndevs)
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return ENXIO;
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sc = pcons_cd.cd_devs[unit];
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if (!sc)
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return ENXIO;
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if (!(tp = sc->of_tty))
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sc->of_tty = tp = ttymalloc();
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tp->t_oproc = pconsstart;
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tp->t_param = pconsparam;
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tp->t_dev = dev;
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if (!(tp->t_state & TS_ISOPEN)) {
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ttychars(tp);
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
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pconsparam(tp, &tp->t_termios);
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ttsetwater(tp);
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} else if ((tp->t_state&TS_XCLUDE) && suser(p->p_ucred, &p->p_acflag))
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return EBUSY;
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tp->t_state |= TS_CARR_ON;
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if (!(sc->of_flags & OFPOLL)) {
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sc->of_flags |= OFPOLL;
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callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc);
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}
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return (*linesw[tp->t_line].l_open)(dev, tp);
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}
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int
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pconsclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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callout_stop(&sc->sc_poll_ch);
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sc->of_flags &= ~OFPOLL;
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(*linesw[tp->t_line].l_close)(tp, flag);
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ttyclose(tp);
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return 0;
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}
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int
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pconsread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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return (*linesw[tp->t_line].l_read)(tp, uio, flag);
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}
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int
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pconswrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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return (*linesw[tp->t_line].l_write)(tp, uio, flag);
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}
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int
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pconsioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
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struct tty *tp = sc->of_tty;
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int error;
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if ((error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p)) >= 0)
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return error;
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if ((error = ttioctl(tp, cmd, data, flag, p)) >= 0)
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return error;
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return ENOTTY;
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}
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struct tty *
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pconstty(dev)
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dev_t dev;
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{
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struct pconssoftc *sc = pcons_cd.cd_devs[minor(dev)];
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return sc->of_tty;
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}
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void
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pconsstop(tp, flag)
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struct tty *tp;
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int flag;
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{
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}
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static void
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pconsstart(tp)
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struct tty *tp;
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{
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struct clist *cl;
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int s, len;
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u_char buf[OFBURSTLEN];
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s = spltty();
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if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
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splx(s);
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return;
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}
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tp->t_state |= TS_BUSY;
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splx(s);
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cl = &tp->t_outq;
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len = q_to_b(cl, buf, OFBURSTLEN);
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OF_write(stdout, buf, len);
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s = spltty();
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tp->t_state &= ~TS_BUSY;
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if (cl->c_cc) {
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tp->t_state |= TS_TIMEOUT;
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callout_reset(&tp->t_rstrt_ch, 1, ttrstrt, (void *)tp);
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}
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if (cl->c_cc <= tp->t_lowat) {
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if (tp->t_state & TS_ASLEEP) {
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tp->t_state &= ~TS_ASLEEP;
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wakeup(cl);
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}
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selwakeup(&tp->t_wsel);
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}
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splx(s);
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}
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static int
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pconsparam(tp, t)
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struct tty *tp;
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struct termios *t;
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{
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tp->t_ispeed = t->c_ispeed;
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tp->t_ospeed = t->c_ospeed;
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tp->t_cflag = t->c_cflag;
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return 0;
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}
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static void
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pcons_poll(aux)
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void *aux;
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{
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struct pconssoftc *sc = aux;
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struct tty *tp = sc->of_tty;
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char ch;
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static int nas = 0;
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while (OF_read(stdin, &ch, 1) > 0) {
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if (ch == 'a') {
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if (nas++ > 3) Debugger();
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} else nas = 0;
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if (tp && (tp->t_state & TS_ISOPEN))
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(*linesw[tp->t_line].l_rint)(ch, tp);
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}
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callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc);
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}
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int
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pconsprobe()
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{
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if (!stdin) stdin = OF_stdin();
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if (!stdout) stdout = OF_stdout();
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return (stdin && stdout);
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}
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void
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pcons_cnpollc(dev, on)
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dev_t dev;
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int on;
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{
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struct pconssoftc *sc = NULL;
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if (pcons_cd.cd_devs)
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sc = pcons_cd.cd_devs[minor(dev)];
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if (on) {
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if (!sc) return;
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if (sc->of_flags & OFPOLL)
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callout_stop(&sc->sc_poll_ch);
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sc->of_flags &= ~OFPOLL;
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} else {
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/* Resuming kernel. */
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if (sc && !(sc->of_flags & OFPOLL)) {
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sc->of_flags |= OFPOLL;
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callout_reset(&sc->sc_poll_ch, 1, pcons_poll, sc);
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}
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}
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}
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