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      1 /*	$NetBSD: cons.c,v 1.7 2011/02/08 20:20:14 rmind 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. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: Utah Hdr: cons.c 1.7 92/02/28
     37  *
     38  *	@(#)cons.c	8.1 (Berkeley) 6/10/93
     39  */
     40 
     41 #include <sys/param.h>
     42 #include <dev/cons.h>
     43 
     44 #include <hp300/stand/common/consdefs.h>
     45 #include <hp300/stand/common/samachdep.h>
     46 
     47 struct consdev constab[] = {
     48 #ifdef ITECONSOLE
     49 	{ iteprobe,	iteinit,	itegetchar,	iteputchar },
     50 #endif
     51 #ifdef DCACONSOLE
     52 	{ dcaprobe,	dcainit,	dcagetchar,	dcaputchar },
     53 #endif
     54 #ifdef APCICONSOLE
     55 	{ apciprobe,	apciinit,	apcigetchar,	apciputchar },
     56 #endif
     57 #ifdef DCMCONSOLE
     58 	{ dcmprobe,	dcminit,	dcmgetchar,	dcmputchar },
     59 #endif
     60 	{ 0 },
     61 };
     62 
     63 int	curcons_scode;	/* select code of device currently being probed */
     64 int	cons_scode;	/* final select code of console device */
     65 
     66 struct consdev *cn_tab;
     67 int noconsole;
     68 
     69 void
     70 cninit(void)
     71 {
     72 	struct consdev *cp;
     73 
     74 	cn_tab = NULL;
     75 	noconsole = 1;
     76 	cons_scode = 256;	/* larger than last valid select code */
     77 	for (cp = constab; cp->cn_probe; cp++) {
     78 		(*cp->cn_probe)(cp);
     79 		if (cp->cn_pri > CN_DEAD &&
     80 		    (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri)) {
     81 			cn_tab = cp;
     82 			cons_scode = curcons_scode;
     83 		}
     84 	}
     85 	if (cn_tab) {
     86 		(*cn_tab->cn_init)(cn_tab);
     87 		noconsole = 0;
     88 #if 0
     89 		printf("console: ");
     90 		switch (cons_scode) {
     91 		case -2:
     92 			printf("apci\n");
     93 			break;
     94 		case -1:
     95 			printf("internal grf\n");
     96 			break;
     97 		default:
     98 			printf("scode %d\n", cons_scode);
     99 		}
    100 #endif
    101 	}
    102 }
    103 
    104 int
    105 cngetc(void)
    106 {
    107 
    108 	/* Note: the dev_t arguments are not used! */
    109 	if (cn_tab)
    110 		return (*cn_tab->cn_getc)(0);
    111 	return 0;
    112 }
    113 
    114 int
    115 cnputc(int c)
    116 {
    117 
    118 	/* Note: the dev_t arguments are not used! */
    119 	if (userom)
    120 		romputchar(c);
    121 	else if (cn_tab)
    122 		(*cn_tab->cn_putc)(0, c);
    123 
    124 	return 0;
    125 }
    126