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cons.c revision 1.8 
      1 /*	$NetBSD: cons.c,v 1.8 2011/02/08 20:20:22 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 <lib/libsa/stand.h>
     42 
     43 #include "boot.h"
     44 #include "cons.h"
     45 
     46 #ifdef CONS_VGA
     47 void vgacnprobe(struct consdev *);
     48 void vgacninit(struct consdev *);
     49 void vgacnputchar(void *, int);
     50 int vgacngetchar(void *);
     51 int vgacnscan(void *);
     52 #endif
     53 
     54 #ifdef CONS_SERIAL
     55 void siocnprobe(struct consdev *);
     56 void siocninit(struct consdev *);
     57 void siocnputchar(void *, int);
     58 int siocngetchar(void *);
     59 int siocnscan(void *);
     60 # include "ns16550.h"
     61 # ifndef COMPORT
     62 #  define COMPORT COM1
     63 # endif
     64 # ifndef COMSPEED
     65 #  define COMSPEED 9600
     66 # endif
     67 #endif
     68 
     69 struct consdev constab[] = {
     70 #ifdef CONS_VGA
     71 	{ "vga", 0xc0000000, 0,
     72 	    vgacnprobe, vgacninit, vgacngetchar, vgacnputchar, vgacnscan },
     73 #endif
     74 #ifdef CONS_SERIAL
     75 	{ "com", COMPORT, COMSPEED,
     76 	    siocnprobe, siocninit, siocngetchar, siocnputchar, siocnscan },
     77 #endif
     78 	{ 0 }
     79 };
     80 
     81 struct consdev *cn_tab;
     82 
     83 char *
     84 cninit(int *addr, int *speed)
     85 {
     86 	register struct consdev *cp;
     87 
     88 	cn_tab = NULL;
     89 	for (cp = constab; cp->cn_probe; cp++) {
     90 		(*cp->cn_probe)(cp);
     91 		if (cp->cn_pri > CN_DEAD &&
     92 		    (cn_tab == NULL || cp->cn_pri > cn_tab->cn_pri))
     93 			cn_tab = cp;
     94 	}
     95 	if (cn_tab) {
     96 		(*cn_tab->cn_init)(cn_tab);
     97 		*addr = cn_tab->address;
     98 		*speed = cn_tab->speed;
     99 		return (cn_tab->cn_name);
    100 	}
    101 
    102 	return (NULL);
    103 }
    104 
    105 int
    106 cngetc(void)
    107 {
    108 
    109 	if (cn_tab)
    110 		return ((*cn_tab->cn_getc)(cn_tab->cn_dev));
    111 	return (0);
    112 }
    113 
    114 void
    115 cnputc(int c)
    116 {
    117 
    118 	if (cn_tab)
    119 		(*cn_tab->cn_putc)(cn_tab->cn_dev, c);
    120 }
    121 
    122 int
    123 cnscan(void)
    124 {
    125 
    126 	if (cn_tab)
    127 		return ((*cn_tab->cn_scan)(cn_tab->cn_dev));
    128 	return -1;
    129 }
    130 
    131 #ifdef CONS_VGA
    132 /*
    133  * VGA console
    134  */
    135 void
    136 vgacnprobe(struct consdev *cp)
    137 {
    138 	cp->cn_pri = CN_NORMAL;
    139 }
    140 
    141 void
    142 vgacninit(struct consdev *cp)
    143 {
    144 
    145 	vga_init((u_char *)cp->address);
    146 	kbdreset();
    147 }
    148 
    149 int
    150 vgacngetchar(void *dev)
    151 {
    152 
    153 	return (kbd_getc());
    154 }
    155 
    156 void
    157 vgacnputchar(void *dev, register int c)
    158 {
    159 
    160 	vga_putc(c);
    161 }
    162 
    163 int
    164 vgacnscan(void *dev)
    165 {
    166 
    167 	return (kbd(1));
    168 }
    169 #endif /* CONS_VGA */
    170 
    171 #ifdef CONS_SERIAL
    172 /*
    173  * serial console
    174  */
    175 void
    176 siocnprobe(struct consdev *cp)
    177 {
    178 
    179 	cp->cn_pri = CN_REMOTE;
    180 }
    181 
    182 void
    183 siocninit(struct consdev *cp)
    184 {
    185 
    186 	cp->cn_dev = (void *)NS16550_init(cp->address, cp->speed);
    187 }
    188 
    189 int
    190 siocngetchar(void *dev)
    191 {
    192 
    193 	return (NS16550_getc((struct NS16550 *)dev));
    194 }
    195 
    196 void
    197 siocnputchar(void *dev, register int c)
    198 {
    199 
    200 	if (c == '\n')
    201 		NS16550_putc((struct NS16550 *)dev, '\r');
    202 	NS16550_putc((struct NS16550 *)dev, c);
    203 }
    204 
    205 int
    206 siocnscan(void *dev)
    207 {
    208 
    209 	return (NS16550_scankbd((struct NS16550 *)dev));
    210 }
    211 #endif /* CONS_SERIAL */
    212