BSD 4_4 release

[unix-history] / usr / src / sys / luna68k / stand / cons.c

/*
* Copyright (c) 1992 OMRON Corporation.
* Copyright (c) 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* OMRON Corporation.
*
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
*      @(#)cons.c      8.1 (Berkeley) 6/10/93
*/

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/conf.h>
#include <luna68k/luna68k/cons.h>

#define NBMC    1
#define NSIO    1
#define NROM    1

/* XXX - all this could be autoconfig()ed */
#include "romvec.h"
#if NBMC > 0
int bmccnprobe(), bmccninit(), bmccngetc(), bmccnputc();
#endif
#if NSIO > 0
int siocnprobe(), siocninit(), siocngetc(), siocnputc();
#endif
#if NROM > 0
int romcnprobe(), romcninit(), romcngetc(), romcnputc();
#endif

struct  consdev constab[] = {
#if NBMC > 0
       { bmccnprobe,   bmccninit,      bmccngetc,      bmccnputc },
#endif
#if NSIO > 0
       { siocnprobe,   siocninit,      siocngetc,      siocnputc },
#endif
#if NROM > 0
       { romcnprobe,   romcninit,      romcngetc,      romcnputc },
#endif
       { 0 },
};
/* end XXX */

struct  tty *constty = 0;       /* virtual console output device */
struct  consdev *cn_tab;        /* physical console device info */
struct  tty *cn_tty;            /* XXX: console tty struct for tprintf */

cninit()
{
       register struct consdev *cp;

       /*
        * Collect information about all possible consoles
        * and find the one with highest priority
        */
       for (cp = constab; cp->cn_probe; cp++) {
               (*cp->cn_probe)(cp);
               if (cp->cn_pri > CN_DEAD &&
                   (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
                       cn_tab = cp;
       }
       /*
        * No console, we can handle it
        */
       if ((cp = cn_tab) == NULL)
               return;
       /*
        * Turn on console
        */
       cn_tty = cp->cn_tp;
       (*cp->cn_init)(cp);
}

cngetc()
{
       if (cn_tab == NULL)
               return(0);
       return((*cn_tab->cn_getc)(cn_tab->cn_dev));
}

cnputc(c)
       register int c;
{
       if (cn_tab == NULL)
               return;
       if (c) {
               (*cn_tab->cn_putc)(cn_tab->cn_dev, c);
               if (c == '\n')
                       (*cn_tab->cn_putc)(cn_tab->cn_dev, '\r');
       }
}