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cons.c revision 1.1 
      1 /*	$NetBSD: cons.c,v 1.1 1997/02/04 03:52:17 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Berkeley and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  * from: Utah Hdr: cons.c 1.7 92/02/28
     41  *
     42  *	@(#)cons.c	8.1 (Berkeley) 6/10/93
     43  */
     44 
     45 #include <sys/param.h>
     46 #include <dev/cons.h>
     47 
     48 #include <hp300/stand/common/consdefs.h>
     49 #include <hp300/stand/common/samachdep.h>
     50 
     51 struct consdev constab[] = {
     52 #ifdef ITECONSOLE
     53 	{ iteprobe,	iteinit,	itegetchar,	iteputchar },
     54 #endif
     55 #ifdef DCACONSOLE
     56 	{ dcaprobe,	dcainit,	dcagetchar,	dcaputchar },
     57 #endif
     58 #ifdef DCMCONSOLE
     59 	{ dcmprobe,	dcminit,	dcmgetchar,	dcmputchar },
     60 #endif
     61 	{ 0 },
     62 };
     63 
     64 int	curcons_scode;	/* select code of device currently being probed */
     65 int	cons_scode;	/* final select code of console device */
     66 
     67 struct consdev *cn_tab;
     68 int noconsole;
     69 
     70 void
     71 cninit()
     72 {
     73 	register struct consdev *cp;
     74 
     75 	cn_tab = NULL;
     76 	noconsole = 1;
     77 	cons_scode = 256;	/* larger than last valid select code */
     78 	for (cp = constab; cp->cn_probe; cp++) {
     79 		(*cp->cn_probe)(cp);
     80 		if (cp->cn_pri > CN_DEAD &&
     81 		    (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri)) {
     82 			cn_tab = cp;
     83 			cons_scode = curcons_scode;
     84 		}
     85 	}
     86 	if (cn_tab) {
     87 		(*cn_tab->cn_init)(cn_tab);
     88 		noconsole = 0;
     89 #if 0
     90 		printf("console: ");
     91 		if (cons_scode == -1)
     92 			printf("internal grf\n");
     93 		else
     94 			printf("scode %d\n", cons_scode);
     95 #endif
     96 	}
     97 }
     98 
     99 int
    100 cngetc()
    101 {
    102 
    103 	/* Note: the dev_t arguments are not used! */
    104 	if (cn_tab)
    105 		return((*cn_tab->cn_getc)(0));
    106 	return(0);
    107 }
    108 
    109 int
    110 cnputc(c)
    111 	int c;
    112 {
    113 
    114 	/* Note: the dev_t arguments are not used! */
    115 #ifdef ROMPRF
    116 	extern int userom;
    117 
    118 	if (userom)
    119 		romputchar(c);
    120 	else
    121 #endif
    122 	if (cn_tab)
    123 		(*cn_tab->cn_putc)(0, c);
    124 
    125 	return (0);
    126 }
    127