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

   1 /*      $NetBSD: devopen.c,v 1.2.2.4 2005/11/10 13:58:37 skrll 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 {
  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 }