488 lines
9.6 KiB
C
488 lines
9.6 KiB
C
/* $NetBSD: kd.c,v 1.17 1996/06/15 14:58:02 gwr Exp $ */
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/*
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* Copyright (c) 1994, 1995 Gordon W. Ross
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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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* 4. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Gordon Ross
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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, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Keyboard/Display device.
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*
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* This driver exists simply to provide a tty device that
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* the indirect console driver can point to.
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* The kbd driver sends its input here.
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* Output goes to the screen via PROM printf.
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/file.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <machine/autoconf.h>
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#include <machine/mon.h>
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#include <machine/psl.h>
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#include <dev/cons.h>
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#include <dev/sun/kbd_xlate.h>
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#define KDMAJOR 1
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#define PUT_WSIZE 64
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cdev_decl(kd); /* open, close, read, write, ioctl, stop, ... */
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struct kd_softc {
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struct device kd_dev; /* required first: base device */
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struct tty *kd_tty;
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};
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/*
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* There is no point in pretending there might be
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* more than one keyboard/display device.
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*/
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struct kd_softc kd_softc;
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static int kdparam(struct tty *, struct termios *);
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static void kdstart(struct tty *);
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int kd_is_console;
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/*
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* This is called by kbd_attach()
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* XXX - Make this a proper child of kbd?
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*/
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void
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kd_init(unit)
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int unit;
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{
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struct kd_softc *kd;
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struct tty *tp;
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if (unit != 0)
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return;
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kd = &kd_softc; /* XXX */
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tp = ttymalloc();
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tp->t_oproc = kdstart;
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tp->t_param = kdparam;
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tp->t_dev = makedev(KDMAJOR, unit);
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tty_attach(tp);
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kd->kd_tty = tp;
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return;
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}
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struct tty *
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kdtty(dev)
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dev_t dev;
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{
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struct kd_softc *kd;
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kd = &kd_softc; /* XXX */
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return (kd->kd_tty);
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}
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int
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kdopen(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 kd_softc *kd;
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int error, s, unit;
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struct tty *tp;
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unit = minor(dev);
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if (unit != 0)
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return ENXIO;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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if ((error = kbd_iopen(unit)) != 0) {
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#ifdef DIAGNOSTIC
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printf("kd: kbd_iopen, error=%d\n", error);
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#endif
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return (error);
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}
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/* It's simpler to do this up here. */
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if (((tp->t_state & (TS_ISOPEN | TS_XCLUDE))
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== (TS_ISOPEN | TS_XCLUDE))
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&& (p->p_ucred->cr_uid != 0) )
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{
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return (EBUSY);
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}
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s = spltty();
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if ((tp->t_state & TS_ISOPEN) == 0) {
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/* First open. */
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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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(void) kdparam(tp, &tp->t_termios);
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ttsetwater(tp);
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/* Flush pending input? Clear translator? */
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/* This (pseudo)device always has SOFTCAR */
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tp->t_state |= TS_CARR_ON;
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}
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splx(s);
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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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kdclose(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 kd_softc *kd;
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struct tty *tp;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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/* XXX This is for cons.c. */
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if ((tp->t_state & TS_ISOPEN) == 0)
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return 0;
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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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kdread(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 kd_softc *kd;
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struct tty *tp;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_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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kdwrite(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 kd_softc *kd;
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struct tty *tp;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_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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kdioctl(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 kd_softc *kd;
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struct tty *tp;
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int error;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
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if (error >= 0)
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return error;
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error = ttioctl(tp, cmd, data, flag, p);
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if (error >= 0)
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return error;
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/* Handle any ioctl commands specific to kbd/display. */
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/* XXX - Send KB* ioctls to kbd module? */
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/* XXX - Send FB* ioctls to fb module? */
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return ENOTTY;
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}
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static int
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kdparam(tp, t)
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struct tty *tp;
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struct termios *t;
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{
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/* XXX - These are ignored... */
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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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int
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kdstop(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 kd_later(void*);
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static void kd_putfb(struct tty *);
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void
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kdstart(tp)
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struct tty *tp;
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{
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struct clist *cl;
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register int s;
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s = spltty();
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if (tp->t_state & (TS_BUSY|TS_TTSTOP|TS_TIMEOUT))
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goto out;
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cl = &tp->t_outq;
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if (cl->c_cc) {
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if (kd_is_console) {
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tp->t_state |= TS_BUSY;
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if ((s & PSL_IPL) == 0) {
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/* called at level zero - update screen now. */
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(void) splsoftclock();
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kd_putfb(tp);
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(void) spltty();
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tp->t_state &= ~TS_BUSY;
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} else {
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/* called at interrupt level - do it later */
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timeout(kd_later, (void*)tp, 0);
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}
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} else {
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/*
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* This driver uses the PROM for writing the screen,
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* and that only works if this is the console device.
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* If this is not the console, just flush the output.
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* Sorry. (In that case, use xdm instead of getty.)
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*/
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ndflush(cl, cl->c_cc);
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}
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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((caddr_t)cl);
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}
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selwakeup(&tp->t_wsel);
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}
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out:
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splx(s);
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}
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/*
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* Timeout function to do delayed writes to the screen.
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* Called at splsoftclock when requested by kdstart.
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*/
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static void
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kd_later(tpaddr)
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void *tpaddr;
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{
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struct tty *tp = tpaddr;
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register int s;
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kd_putfb(tp);
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s = spltty();
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tp->t_state &= ~TS_BUSY;
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(*linesw[tp->t_line].l_start)(tp);
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splx(s);
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}
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/*
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* Put text on the screen using the PROM monitor.
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* This can take a while, so to avoid missing
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* interrupts, this is called at splsoftclock.
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*/
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static void kd_putfb(tp)
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struct tty *tp;
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{
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char buf[PUT_WSIZE];
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struct clist *cl = &tp->t_outq;
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char *p, *end;
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int len;
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while ((len = q_to_b(cl, buf, PUT_WSIZE-1)) > 0) {
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/* PROM will barf if high bits are set. */
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p = buf;
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end = buf + len;
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while (p < end)
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*p++ &= 0x7f;
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(romVectorPtr->fbWriteStr)(buf, len);
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}
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}
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/*
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* Our "interrupt" routine for input. This is called by
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* the keyboard driver (dev/sun/kbd.c) at spltty.
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*/
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void
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kd_input(c)
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int c;
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{
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struct kd_softc *kd = &kd_softc;
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struct tty *tp;
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/* XXX: Make sure the device is open. */
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tp = kd->kd_tty;
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if (tp == NULL)
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return;
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if ((tp->t_state & TS_ISOPEN) == 0)
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return;
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(*linesw[tp->t_line].l_rint)(c, tp);
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}
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/****************************************************************
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* kd console support
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****************************************************************/
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extern void *zs_conschan;
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extern int zs_getc();
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extern void nullcnprobe();
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cons_decl(kd);
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/* The debugger gets its own key translation state. */
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static struct kbd_state kdcn_state;
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void
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kdcninit(cn)
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struct consdev *cn;
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{
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struct kbd_state *ks = &kdcn_state;
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mon_printf("console on kd0 (keyboard/display)\n");
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/* This prepares kbd_translate() */
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ks->kbd_id = KBD_MIN_TYPE;
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kbd_xlate_init(ks);
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/* Indicate that it is OK to use the PROM fbwrite */
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kd_is_console = 1;
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}
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int
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kdcngetc(dev)
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dev_t dev;
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{
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struct kbd_state *ks = &kdcn_state;
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int code, class, data, keysym;
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for (;;) {
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code = zs_getc(zs_conschan);
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keysym = kbd_code_to_keysym(ks, code);
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class = KEYSYM_CLASS(keysym);
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switch (class) {
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case KEYSYM_ASCII:
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goto out;
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case KEYSYM_CLRMOD:
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case KEYSYM_SETMOD:
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data = (keysym & 0x1F);
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/* Only allow ctrl or shift. */
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if (data > KBMOD_SHIFT_R)
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break;
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data = 1 << data;
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if (class == KEYSYM_SETMOD)
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ks->kbd_modbits |= data;
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else
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ks->kbd_modbits &= ~data;
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break;
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case KEYSYM_ALL_UP:
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/* No toggle keys here. */
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ks->kbd_modbits = 0;
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break;
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default: /* ignore all other keysyms */
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break;
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}
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}
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out:
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return (keysym);
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}
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void
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kdcnputc(dev, c)
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dev_t dev;
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int c;
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{
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(romVectorPtr->fbWriteChar)(c & 0x7f);
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}
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extern void fb_unblank();
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void kdcnpollc(dev, on)
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dev_t dev;
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int on;
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{
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struct kbd_state *ks = &kdcn_state;
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if (on) {
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/* Entering debugger. */
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fb_unblank();
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/* Clear shift keys too. */
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ks->kbd_modbits = 0;
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} else {
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/* Resuming kernel. */
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}
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}
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struct consdev consdev_kd = {
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nullcnprobe,
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kdcninit,
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kdcngetc,
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kdcnputc,
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kdcnpollc,
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makedev(KDMAJOR, 0),
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CN_INTERNAL
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};
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