atibus.c revision 32b578d3 
1/*
2 * Copyright 1997 through 2004 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of Marc Aurele La France not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission.  Marc Aurele La France makes no representations
11 * about the suitability of this software for any purpose.  It is provided
12 * "as-is" without express or implied warranty.
13 *
14 * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO
16 * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20 * PERFORMANCE OF THIS SOFTWARE.
21 */
22
23#ifdef HAVE_CONFIG_H
24#include "config.h"
25#endif
26
27#include <string.h>
28
29#include "ati.h"
30#include "atibus.h"
31#include "atichip.h"
32#include "atimach64io.h"
33#include "atistruct.h"
34
35/*
36 * Definitions related to an adapter's system bus interface.
37 */
38
39const char *ATIBusNames[] =
40{
41    "PCI",
42    "AGP"
43};
44
45/*
46 * ATIClaimResources --
47 *
48 * This function registers most of the bus resources used by an adapter.  The
49 * exceptions are PCI-configured resources and non-PCI non-AGP linear
50 * apertures, both of which are registered by ATIPreInit().  This function also
51 * attempts to register unshareable resources for inactive PCI adapters,
52 * whether or not they are relocatable.
53 */
54static void
55ATIClaimResources
56(
57    ATIPtr pATI,
58    Bool   Active
59)
60{
61
62#ifndef AVOID_CPIO
63
64    resRange Resources[2] = {{0, 0, 0}, _END};
65
66    /* Claim VGA and VGAWonder resources */
67    if ((pATI->VGAAdapter) && (Active))
68    {
69        /*
70         * 18800-x's are the only ATI controllers that decode all ISA aliases
71         * of VGA and VGA Wonder I/O ports.  Other x8800's do not decode >any<
72         * VGA aliases, but do decode VGA Wonder aliases whose most significant
73         * nibble is zero.
74         */
75        xf86ClaimFixedResources(resVgaShared, pATI->iEntity);
76
77        if (pATI->CPIO_VGAWonder)
78        {
79            Resources[0].type = ResShrIoSparse | ResBus;
80            Resources[0].rBase = pATI->CPIO_VGAWonder;
81            Resources[0].rMask = 0xF3FEU;
82
83            xf86ClaimFixedResources(Resources, pATI->iEntity);
84
85            (void)memcpy(pATI->VGAWonderResources,
86                Resources, SizeOf(Resources));
87        }
88    }
89
90    if (!Active)
91        return;
92
93    /* Claim Mach64 sparse I/O resources */
94    if ((pATI->CPIODecoding == SPARSE_IO))
95    {
96        Resources[0].type = ResShrIoSparse | ResBus;
97        Resources[0].rBase = pATI->CPIOBase;
98        Resources[0].rMask = 0x03FCU;
99
100        xf86ClaimFixedResources(Resources, pATI->iEntity);
101    }
102
103#endif /* AVOID_CPIO */
104
105}
106
107/*
108 * ATIClaimBusSlot --
109 *
110 * Claim an adapter and register its resources.
111 */
112int
113ATIClaimBusSlot
114(
115    Bool      Active,
116    ATIPtr    pATI
117)
118{
119    if (pATI->iEntity >= 0)
120        ATIClaimResources(pATI, Active);
121
122    return pATI->iEntity;
123}
124