1/*	$NetBSD: cons.c,v 1.2 2008/03/01 05:21:50 tsutsui 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
47void siocnprobe(struct consdev *);
48void siocninit(struct consdev *);
49void siocnputchar(void *, int);
50int siocngetchar(void *);
51int 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
61struct consdev constab[] = {
62#ifdef CONS_SERIAL
63	{ "com", COMPORT, COMSPEED,
64	    siocnprobe, siocninit, siocngetchar, siocnputchar, siocnscan },
65#endif
66	{ 0 }
67};
68
69struct consdev *cn_tab;
70
71char *
72cninit(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
93int
94cngetc(void)
95{
96
97	if (cn_tab)
98		return ((*cn_tab->cn_getc)(cn_tab->cn_dev));
99	return (0);
100}
101
102void
103cnputc(int c)
104{
105
106	if (cn_tab)
107		(*cn_tab->cn_putc)(cn_tab->cn_dev, c);
108}
109
110int
111cnscan(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 */
123void
124siocnprobe(struct consdev *cp)
125{
126
127	cp->cn_pri = CN_REMOTE;
128}
129
130void
131siocninit(struct consdev *cp)
132{
133
134	cp->cn_dev = (void *)NS16550_init(cp->address, cp->speed);
135}
136
137int
138siocngetchar(void *dev)
139{
140
141	return (NS16550_getc((struct NS16550 *)dev));
142}
143
144void
145siocnputchar(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
153int
154siocnscan(void *dev)
155{
156
157	return (NS16550_scankbd((struct NS16550 *)dev));
158}
159#endif /* CONS_SERIAL */
160