sys/arch/mipsco/stand/common/devopen.c

   1 /*      $NetBSD: devopen.c,v 1.5 2005/12/11 12:18:16 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
  45 devopen(struct open_file *f, const char *fname, char **file)
  46         /* file:         out */
  47 {
  48         int ctlr = 0, unit = 0, part = 0;
  49         int c, rc;
  50         char namebuf[20];
  51         const char *cp;
  52         char *ncp;
  53 #if !defined(LIBSA_SINGLE_DEVICE)
  54         int i;
  55         struct devsw *dp;
  56 #endif
  57
  58         cp = fname;
  59         ncp = namebuf;
  60
  61         /* expect a string like 'dksd(0,0,0)netbsd' */
  62         while ((c = *cp) != '\0') {
  63                 if (c == '(') {
  64                         cp++;
  65                         break;
  66                 }
  67                 if (ncp < namebuf + sizeof(namebuf) - 1)
  68                         *ncp++ = c;
  69                 cp++;
  70         }
  71
  72         /* get controller number */
  73         if ((c = *cp) >= '0' && c <= '9') {
  74                 ctlr = c - '0';
  75                 c = *++cp;
  76         }
  77
  78         if (c == ',') {
  79                 /* get SCSI device number */
  80                 if ((c = *++cp) >= '0' && c <= '9') {
  81                         unit = c - '0';
  82                         c = *++cp;
  83                 }
  84
  85                 if (c == ',') {
  86                         /* get partition number */
  87                         if ((c = *++cp) >= '0' && c <= '9') {
  88                                 part = c - '0';
  89                                 /* dksd(,,8)boot -> dksd(,,) */
  90                                 if (part >= 8)
  91                                         part = 0;
  92                                 c = *++cp;
  93                         }
  94                 }
  95         }
  96         if (c != ')')
  97                 return (ENXIO);
  98         cp++;
  99
 100         *ncp = '\0';
 101
 102 #ifdef LIBSA_SINGLE_DEVICE
 103         rc = DEV_OPEN(dp)(f, ctlr, unit, part);
 104 #else /* !LIBSA_SINGLE_DEVICE */
 105         for (dp = devsw, i = 0; i < ndevs; dp++, i++)
 106                 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0)
 107                         goto fnd;
 108         printf("Unknown device '%s'\nKnown devices are:", namebuf);
 109         for (dp = devsw, i = 0; i < ndevs; dp++, i++)
 110                 if (dp->dv_name)
 111                         printf(" %s", dp->dv_name);
 112         printf("\n");
 113         return (ENXIO);
 114
 115 fnd:
 116 #ifdef BOOTNET
 117         if (strcmp(namebuf, "tftp") == 0)
 118                 rc = (dp->dv_open)(f, namebuf);
 119         else
 120 #endif /* BOOTNET */
 121                 rc = (dp->dv_open)(f, ctlr, unit, part);
 122 #endif /* !LIBSA_SINGLE_DEVICE */
 123         if (rc)
 124                 return (rc);
 125
 126 #ifndef LIBSA_SINGLE_DEVICE
 127         f->f_dev = dp;
 128 #endif
 129         if (file && *cp != '\0')
 130                 *file = (char *)cp;     /* XXX */
 131         return (0);
 132 }