1 /* $NetBSD: devopen.c,v 1.6 2005/12/11 12:18:58 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)devopen.c 8.1 (Berkeley) 6/10/93
35 */
36
37 #include <lib/libsa/stand.h>
38 #include <lib/libkern/libkern.h>
39
40 /*
41 * Decode the string 'fname', open the device and return the remaining
42 * file name if any.
43 */
44 int
devopen(struct open_file * f,const char * fname,char ** file)45 devopen(struct open_file *f, const char *fname, char **file)
46 {
47 #if 0
48 int ctlr = 0, unit = 0, part = 0;
49 #endif
50 int error;
51 char namebuf[128];
52 char devtype[16];
53 const char *cp;
54 char *ncp;
55 #if !defined(LIBSA_SINGLE_DEVICE)
56 int i;
57 struct devsw *dp;
58 #endif
59
60 cp = fname;
61 ncp = (char *)fname;
62
63 /*
64 * If device starts with a PCI bus specifier, skip past it so the
65 * device-matching code below gets the actual device type. Leave
66 * fname as is, since it'll be passed back to ARCS to open the
67 * device. This is necessary for the IP32.
68 */
69 if (strncmp(cp, "pci", 3) == 0) {
70 while (*ncp && *ncp++ != ')')
71 ;
72 if (*ncp)
73 cp = ncp;
74 }
75
76 /*
77 * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd'
78 * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path
79 * or an abosolute path).
80 */
81 if (strncmp(cp, "scsi", 4) == 0) {
82 strcpy(devtype, "scsi");
83 } else if (strncmp(cp, "dksc", 4) == 0) {
84 strcpy(devtype, "dksc");
85 } else {
86 return ENXIO;
87 }
88
89 while (ncp != NULL && *ncp != 0) {
90 while (*ncp && *ncp++ != ')')
91 ;
92 if (*ncp)
93 cp = ncp;
94 }
95
96 strncpy(namebuf, fname, sizeof(namebuf));
97 namebuf[cp - fname] = 0;
98
99 printf("devopen: %s type %s file %s\n", namebuf, devtype, cp);
100 #ifdef LIBSA_SINGLE_DEVICE
101 error = DEV_OPEN(dp)(f, fname);
102 #else /* !LIBSA_SINGLE_DEVICE */
103 for (dp = devsw, i = 0; i < ndevs; dp++, i++)
104 if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0)
105 goto found;
106 printf("Unknown device '%s'\nKnown devices are:", devtype);
107 for (dp = devsw, i = 0; i < ndevs; dp++, i++)
108 if (dp->dv_name)
109 printf(" %s", dp->dv_name);
110 printf("\n");
111 return ENXIO;
112
113 found:
114 error = (dp->dv_open)(f, namebuf);
115 #endif /* !LIBSA_SINGLE_DEVICE */
116 if (error)
117 return error;
118
119 #ifndef LIBSA_SINGLE_DEVICE
120 f->f_dev = dp;
121 #endif
122 if (file && *cp != '\0')
123 *file = (char *)cp; /* XXX */
124 return 0;
125 }
126