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      1 /*	$NetBSD: cons.c,v 1.3 2011/02/08 20:20:23 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_SERIAL
     47 void siocnprobe(struct consdev *);
     48 void siocninit(struct consdev *);
     49 void siocnputchar(void *, int);
     50 int siocngetchar(void *);
     51 int siocnscan(void *);
     52 # include "ns16550.h"
     53 # ifndef COMPORT
     54 #  define COMPORT COM1
     55 # endif
     56 # ifndef COMSPEED
     57 #  define COMSPEED 9600
     58 # endif
     59 #endif
     60 
     61 struct consdev constab[] = {
     62 #ifdef CONS_SERIAL
     63 	{ "com", COMPORT, COMSPEED,
     64 	    siocnprobe, siocninit, siocngetchar, siocnputchar, siocnscan },
     65 #endif
     66 	{ 0 }
     67 };
     68 
     69 struct consdev *cn_tab;
     70 
     71 char *
     72 cninit(int *addr, int *speed)
     73 {
     74 	register struct consdev *cp;
     75 
     76 	cn_tab = NULL;
     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 	}
     83 	if (cn_tab) {
     84 		(*cn_tab->cn_init)(cn_tab);
     85 		*addr = cn_tab->address;
     86 		*speed = cn_tab->speed;
     87 		return (cn_tab->cn_name);
     88 	}
     89 
     90 	return (NULL);
     91 }
     92 
     93 int
     94 cngetc(void)
     95 {
     96 
     97 	if (cn_tab)
     98 		return ((*cn_tab->cn_getc)(cn_tab->cn_dev));
     99 	return (0);
    100 }
    101 
    102 void
    103 cnputc(int c)
    104 {
    105 
    106 	if (cn_tab)
    107 		(*cn_tab->cn_putc)(cn_tab->cn_dev, c);
    108 }
    109 
    110 int
    111 cnscan(void)
    112 {
    113 
    114 	if (cn_tab)
    115 		return ((*cn_tab->cn_scan)(cn_tab->cn_dev));
    116 	return -1;
    117 }
    118 
    119 #ifdef CONS_SERIAL
    120 /*
    121  * serial console
    122  */
    123 void
    124 siocnprobe(struct consdev *cp)
    125 {
    126 
    127 	cp->cn_pri = CN_REMOTE;
    128 }
    129 
    130 void
    131 siocninit(struct consdev *cp)
    132 {
    133 
    134 	cp->cn_dev = (void *)NS16550_init(cp->address, cp->speed);
    135 }
    136 
    137 int
    138 siocngetchar(void *dev)
    139 {
    140 
    141 	return (NS16550_getc((struct NS16550 *)dev));
    142 }
    143 
    144 void
    145 siocnputchar(void *dev, register int c)
    146 {
    147 
    148 	if (c == '\n')
    149 		NS16550_putc((struct NS16550 *)dev, '\r');
    150 	NS16550_putc((struct NS16550 *)dev, c);
    151 }
    152 
    153 int
    154 siocnscan(void *dev)
    155 {
    156 
    157 	return (NS16550_scankbd((struct NS16550 *)dev));
    158 }
    159 #endif /* CONS_SERIAL */
    160