sys/arch/i386/stand/lib/biospci.c

   1 /*      $NetBSD: biospci.c,v 1.5 2008/12/14 17:03:43 christos Exp $      */
   2
   3 /*
   4  * Copyright (c) 1996
   5  *      Matthias Drochner.  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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  */
  28
  29 /*
  30  * basic PCI functions for libsa needs lowlevel parts from bios_pci.S
  31  */
  32
  33 #include <lib/libsa/stand.h>
  34
  35 #include "pcivar.h"
  36
  37 extern int pcibios_present(int *);
  38 extern int pcibios_finddev(int, int, int, unsigned int *);
  39 extern int pcibios_cfgread(unsigned int, int, int *);
  40 extern int pcibios_cfgwrite(unsigned int, int, int);
  41
  42 #define PCISIG ('P' | ('C' << 8) | ('I' << 16) | (' ' << 24))
  43
  44 int
  45 pcicheck(void)
  46 {
  47         int             ret, sig;
  48
  49         ret = pcibios_present(&sig);
  50
  51         if ((ret & 0xff00) || (sig != PCISIG))
  52                 return -1;
  53
  54         return 0;
  55 }
  56
  57 int
  58 pcifinddev(int vid, int did, pcihdl_t *handle)
  59 {
  60         int             ret;
  61
  62         *handle = 0;
  63
  64         ret = pcibios_finddev(vid, did, 0, handle);
  65
  66         if (ret)
  67                 return -1;
  68
  69         return 0;
  70 }
  71
  72 int
  73 pcicfgread(pcihdl_t *handle, int off, int *val)
  74 {
  75         int             ret;
  76
  77         ret = pcibios_cfgread(*handle, off, val);
  78
  79         if (ret)
  80                 return -1;
  81
  82         return 0;
  83 }
  84
  85 int
  86 pcicfgwrite(pcihdl_t *handle, int off, int val)
  87 {
  88         int             ret;
  89
  90         ret = pcibios_cfgwrite(*handle, off, val);
  91
  92         if (ret)
  93                 return -1;
  94
  95         return 0;
  96 }