1/*	$NetBSD: biospci.c,v 1.4 2005/12/11 12:17:48 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
37extern int pcibios_present(int *);
38extern int pcibios_finddev(int, int, int, unsigned int *);
39extern int pcibios_cfgread(unsigned int, int, int *);
40extern int pcibios_cfgwrite(unsigned int, int, int);
41
42#define PCISIG ('P' | ('C' << 8) | ('I' << 16) | (' ' << 24))
43
44int
45pcicheck(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
57int
58pcifinddev(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
72int
73pcicfgread(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
85int
86pcicfgwrite(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}
97