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