299 lines
6.2 KiB
C
299 lines
6.2 KiB
C
/* $NetBSD: kd.c,v 1.8 1994/12/17 20:14:23 gwr Exp $ */
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/*
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* Copyright (c) 1994 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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*
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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 <dev/cons.h>
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#define BURST 64
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struct tty *kd_tty[1];
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int kdopen(dev_t, int, int, struct proc *);
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int kdclose(dev_t, int, int, struct proc *);
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int kdread(dev_t, struct uio *, int);
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int kdwrite(dev_t, struct uio *, int);
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int kdioctl(dev_t, int, caddr_t, int, struct proc *);
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static int kdparam(struct tty *, struct termios *);
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static void kdstart(struct tty *);
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/* This is called by kbd_serial() like a pseudo-device. */
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void
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kd_attach(n)
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int n;
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{
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kd_tty[0] = ttymalloc();
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/* Tell keyboard module where to send read data. */
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kbd_ascii(kd_tty[0]);
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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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int error, unit;
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struct tty *tp;
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unit = minor(dev);
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if (unit) return ENXIO;
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tp = kd_tty[unit];
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if (tp == NULL)
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return ENXIO;
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if ((error = kbd_iopen()) != 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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tp->t_oproc = kdstart;
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tp->t_param = kdparam;
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tp->t_dev = dev;
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if ((tp->t_state & TS_ISOPEN) == 0) {
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tp->t_state |= TS_WOPEN;
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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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kdparam(tp, &tp->t_termios);
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ttsetwater(tp);
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} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
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return EBUSY;
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tp->t_state |= TS_CARR_ON;
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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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int unit = minor(dev);
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struct tty *tp = kd_tty[unit];
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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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int unit = minor(dev);
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struct tty *tp = kd_tty[unit];
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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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int unit = minor(dev);
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struct tty *tp = kd_tty[unit];
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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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int 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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int error;
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int unit = minor(dev);
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struct tty *tp = kd_tty[unit];
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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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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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int s, len;
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u_char buf[BURST];
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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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tp->t_state |= TS_BUSY;
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cl = &tp->t_outq;
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/*
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* XXX - It might be nice to have our own fbputs() so
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* we would not have to use the (slow) PROM printf.
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*/
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while ((len = q_to_b(cl, buf, BURST-1)) > 0) {
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buf[len] = '\0';
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(void) splhigh();
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#if 0
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/* XXX - Not yet. Not sure what args should be. */
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(romVectorPtr->fbWriteStr)(buf);
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#else
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mon_printf("%s", buf);
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#endif
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(void) spltty();
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}
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tp->t_state &= ~TS_BUSY;
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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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out:
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splx(s);
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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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/*
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* kd console support
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*/
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extern int zscnprobe_kbd(), zscngetc(), kbd_translate();
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kdcnprobe(cp)
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struct consdev *cp;
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{
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int maj;
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/* locate the major number */
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for (maj = 0; maj < nchrdev; maj++)
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if (cdevsw[maj].d_open == (void*)kdopen)
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break;
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/* initialize required fields */
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cp->cn_dev = makedev(maj, 0);
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cp->cn_pri = zscnprobe_kbd();
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}
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kdcninit(cp)
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struct consdev *cp;
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{
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/* This prepares zscngetc() */
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zs_set_conschan(1, 0);
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/* This prepares kbd_translate() */
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kbd_init_tables();
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mon_printf("console on kd0 (keyboard/display)\n");
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}
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kdcngetc(dev)
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dev_t dev;
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{
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int c;
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do {
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c = zscngetc(0);
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c = kbd_translate(c);
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} while (c == -1);
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return (c);
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}
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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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int s;
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s = splhigh();
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#if 0
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/* XXX - Is this worth doing? */
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(romVectorPtr->fbWriteChar)(c);
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#else
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mon_putchar(c);
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#endif
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splx(s);
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}
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