1/*	$NetBSD: devopen.c,v 1.1 2009/03/02 09:33:02 nonaka Exp $	*/
2
3/*-
4 *  Copyright (c) 1993 John Brezak
5 *  All rights reserved.
6 *
7 *  Redistribution and use in source and binary forms, with or without
8 *  modification, are permitted provided that the following conditions
9 *  are met:
10 *  1. Redistributions of source code must retain the above copyright
11 *     notice, this list of conditions and the following disclaimer.
12 *  2. Redistributions in binary form must reproduce the above copyright
13 *     notice, this list of conditions and the following disclaimer in the
14 *     documentation and/or other materials provided with the distribution.
15 *  3. The name of the author may not be used to endorse or promote products
16 *     derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED.	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <sys/param.h>
32#include <sys/disklabel.h>
33
34#include "boot.h"
35#include "bootinfo.h"
36#include "disk.h"
37#include "unixdev.h"
38
39static int dev2bios(char *devname, unsigned int unit, int *biosdev);
40static int devlookup(char *d);
41
42static int
43dev2bios(char *devname, unsigned int unit, int *biosdev)
44{
45
46	if (strcmp(devname, devname_hd) == 0) {
47		*biosdev = 0x80 + unit;
48		return 0;
49	} else if (strcmp(devname, devname_mmcd) == 0) {
50		*biosdev = 0x00 + unit;
51		return 0;
52	}
53	return ENXIO;
54}
55
56static int
57devlookup(char *d)
58{
59	struct devsw *dp = devsw;
60	int i;
61
62	for (i = 0; i < ndevs; i++, dp++) {
63		if ((dp->dv_name != NULL) && (strcmp(dp->dv_name, d) == 0)) {
64			return i;
65		}
66	}
67
68	printf("No such device - Configured devices are:\n");
69	for (dp = devsw, i = 0; i < ndevs; i++, dp++) {
70		if (dp->dv_name != NULL) {
71			printf(" %s", dp->dv_name);
72		}
73	}
74	printf("\n");
75	return -1;
76}
77
78int
79devopen(struct open_file *f, const char *fname, char **file)
80{
81	struct devsw *dp;
82	char *fsname, *devname;
83	u_int dev, unit, partition;
84	int biosdev;
85	int error;
86
87#if defined(UNIX_DEBUG)
88	printf("devopen: fname = %s\n", fname ? fname : "(null)");
89#endif
90
91	if ((error = parsebootfile(fname, &fsname, &devname, &unit, &partition,
92	    (const char **)file)) != 0) {
93		return error;
94	}
95
96#if defined(UNIX_DEBUG)
97	printf("devopen: devname = %s\n", devname);
98#endif
99	dev = devlookup(devname);
100	if (dev == -1) {
101#if defined(UNIX_DEBUG)
102		printf("devopen: devlookup failed\n");
103#endif
104		return ENXIO;
105	}
106
107	dp = &devsw[dev];
108	if (dp->dv_open == NULL) {
109#if defined(UNIX_DEBUG)
110		printf("devopen: dev->dv_open() == NULL\n");
111#endif
112		return ENODEV;
113	}
114	f->f_dev = dp;
115
116	if (dev2bios(devname, unit, &biosdev) == 0) {
117#if defined(UNIX_DEBUG)
118		printf("devopen: bios disk\n");
119#endif
120		return unixopen(f, devname, unit, partition, *file);
121	}
122
123#if defined(UNIX_DEBUG)
124	printf("devopen: dev->dv_open()\n");
125#endif
126	if ((error = (*dp->dv_open)(f, devname, unit, partition, *file)) == 0) {
127#if defined(UNIX_DEBUG)
128		printf("devopen: dev->dv_open() opened\n");
129#endif
130		return 0;
131	}
132
133	printf("%s%d%c:%s : %s\n", dp->dv_name, unit, partition + 'a', *file,
134	    strerror(error));
135	return error;
136}
137