xref: /minix3/sys/arch/i386/stand/lib/biospci.c (revision 58a2b0008e28f606a7f7f5faaeaba4faac57a1ea)
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
pcicheck(void)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
pcifinddev(int vid,int did,pcihdl_t * handle)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
pcicfgread(pcihdl_t * handle,int off,int * val)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
pcicfgwrite(pcihdl_t * handle,int off,int val)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 }
97