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cons.c revision 1.2 
      1 /*	$NetBSD: cons.c,v 1.2 1997/05/12 07:44:53 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 APCICONSOLE
     59 	{ apciprobe,	apciinit,	apcigetchar,	apciputchar },
     60 #endif
     61 #ifdef DCMCONSOLE
     62 	{ dcmprobe,	dcminit,	dcmgetchar,	dcmputchar },
     63 #endif
     64 	{ 0 },
     65 };
     66 
     67 int	curcons_scode;	/* select code of device currently being probed */
     68 int	cons_scode;	/* final select code of console device */
     69 
     70 struct consdev *cn_tab;
     71 int noconsole;
     72 
     73 void
     74 cninit()
     75 {
     76 	register struct consdev *cp;
     77 
     78 	cn_tab = NULL;
     79 	noconsole = 1;
     80 	cons_scode = 256;	/* larger than last valid select code */
     81 	for (cp = constab; cp->cn_probe; cp++) {
     82 		(*cp->cn_probe)(cp);
     83 		if (cp->cn_pri > CN_DEAD &&
     84 		    (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri)) {
     85 			cn_tab = cp;
     86 			cons_scode = curcons_scode;
     87 		}
     88 	}
     89 	if (cn_tab) {
     90 		(*cn_tab->cn_init)(cn_tab);
     91 		noconsole = 0;
     92 #if 0
     93 		printf("console: ");
     94 		switch (cons_scode) {
     95 		case -2:
     96 			printf("apci\n");
     97 			break;
     98 		case -1:
     99 			printf("internal grf\n");
    100 			break;
    101 		default:
    102 			printf("scode %d\n", cons_scode);
    103 		}
    104 #endif
    105 	}
    106 }
    107 
    108 int
    109 cngetc()
    110 {
    111 
    112 	/* Note: the dev_t arguments are not used! */
    113 	if (cn_tab)
    114 		return((*cn_tab->cn_getc)(0));
    115 	return(0);
    116 }
    117 
    118 int
    119 cnputc(c)
    120 	int c;
    121 {
    122 
    123 	/* Note: the dev_t arguments are not used! */
    124 	if (userom)
    125 		romputchar(c);
    126 	else if (cn_tab)
    127 		(*cn_tab->cn_putc)(0, c);
    128 
    129 	return (0);
    130 }
    131