File: atiwonder.c

package info (click to toggle)
xserver-xorg-video-mach64 6.9.6-3
  • links: PTS
  • area: main
  • in suites: bullseye, sid
  • size: 3,156 kB
  • sloc: ansic: 17,608; sh: 4,188; makefile: 105
file content (159 lines) | stat: -rw-r--r-- 5,932 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
/*
 * Copyright 1997 through 2004 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of Marc Aurele La France not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  Marc Aurele La France makes no representations
 * about the suitability of this software for any purpose.  It is provided
 * "as-is" without express or implied warranty.
 *
 * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO
 * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/*
 * The ATI x8800 chips use special registers for their extended VGA features.
 * These registers are accessible through an index I/O port and a data I/O
 * port.  BIOS initialisation stores the index port number in the Graphics
 * register bank (0x03CE), indices 0x50 and 0x51.  Unfortunately, for all but
 * the 18800-x series of adapters, these registers are write-only (a.k.a. black
 * holes).  On all but 88800's, the index port number can be found in the short
 * integer at offset 0x10 in the BIOS.  For 88800's, this driver will use
 * 0x01CE or 0x03CE as the index port number, depending on the I/O port
 * decoding used.  The data port number is one more than the index port number
 * (i.e. 0x01CF).  These ports differ slightly in their I/O behaviour from the
 * normal VGA ones:
 *
 *    write:  outw(0x01CE, (data << 8) | index);        (16-bit, not used)
 *            outb(0x01CE, index);  outb(0x01CF, data); (8-bit)
 *    read:   outb(0x01CE, index);  data = inb(0x01CF);
 *
 * Two consecutive byte-writes to the data port will not work.  Furthermore an
 * index written to 0x01CE is usable only once.  Note also that the setting of
 * ATI extended registers (especially those with clock selection bits) should
 * be bracketed by a sequencer reset.
 *
 * The number of these extended VGA registers varies by chipset.  The 18800
 * series have 16, the 28800 series have 32, while 68800's and 88800's have 64.
 * The last 16 on each have almost identical definitions.  Thus, the BIOS sets
 * up an indexing scheme whereby the last 16 extended VGA registers are
 * accessed at indices 0xB0 through 0xBF on all chipsets.
 */

#include "ati.h"
#include "atichip.h"
#include "atiwonder.h"
#include "atiwonderio.h"

#ifndef AVOID_CPIO

/*
 * ATIVGAWonderPreInit --
 *
 * This function is called to initialise the VGA Wonder part of an ATIHWRec
 * that is common to all modes generated by the driver.
 */
void
ATIVGAWonderPreInit
(
    ATIPtr      pATI,
    ATIHWPtr    pATIHW
)
{
    pATIHW->b3 = ATIGetExtReg(0xB3U) & 0x20U;
        pATIHW->b6 = 0x04U;
        pATIHW->b6 |= 0x01U;
        pATIHW->bf = ATIGetExtReg(0xBFU) & 0x5FU;
        pATIHW->a3 = ATIGetExtReg(0xA3U) & 0x67U;
        pATIHW->ab = ATIGetExtReg(0xABU) & 0xE7U;
        pATIHW->ae = ATIGetExtReg(0xAEU) & 0xE0U;
}

/*
 * ATIVGAWonderSave --
 *
 * This function is called to save the VGA Wonder portion of the current video
 * state.
 */
void
ATIVGAWonderSave
(
    ATIPtr      pATI,
    ATIHWPtr    pATIHW
)
{
    pATIHW->b0 = ATIGetExtReg(0xB0U);
    pATIHW->b1 = ATIGetExtReg(0xB1U);
    pATIHW->b2 = ATIGetExtReg(0xB2U);
    pATIHW->b3 = ATIGetExtReg(0xB3U);
    pATIHW->b5 = ATIGetExtReg(0xB5U);
    pATIHW->b6 = ATIGetExtReg(0xB6U);
    pATIHW->b8 = ATIGetExtReg(0xB8U);
    pATIHW->b9 = ATIGetExtReg(0xB9U);
    pATIHW->ba = ATIGetExtReg(0xBAU);
    pATIHW->bd = ATIGetExtReg(0xBDU);
    {
        pATIHW->be = ATIGetExtReg(0xBEU);
        {
            pATIHW->bf = ATIGetExtReg(0xBFU);
            pATIHW->a3 = ATIGetExtReg(0xA3U);
            pATIHW->a6 = ATIGetExtReg(0xA6U);
            pATIHW->a7 = ATIGetExtReg(0xA7U);
            pATIHW->ab = ATIGetExtReg(0xABU);
            pATIHW->ac = ATIGetExtReg(0xACU);
            pATIHW->ad = ATIGetExtReg(0xADU);
            pATIHW->ae = ATIGetExtReg(0xAEU);
        }
    }
}

/*
 * ATIVGAWonderSet --
 *
 * This function loads the VGA Wonder portion of a video state.
 */
void
ATIVGAWonderSet
(
    ATIPtr      pATI,
    ATIHWPtr    pATIHW
)
{
    {
        ATIModifyExtReg(pATI, 0xBEU, -1, 0x00U, pATIHW->be);
        {
            ATIModifyExtReg(pATI, 0xBFU, -1, 0x00U, pATIHW->bf);
            ATIModifyExtReg(pATI, 0xA3U, -1, 0x00U, pATIHW->a3);
            ATIModifyExtReg(pATI, 0xA6U, -1, 0x00U, pATIHW->a6);
            ATIModifyExtReg(pATI, 0xA7U, -1, 0x00U, pATIHW->a7);
            ATIModifyExtReg(pATI, 0xABU, -1, 0x00U, pATIHW->ab);
            ATIModifyExtReg(pATI, 0xACU, -1, 0x00U, pATIHW->ac);
            ATIModifyExtReg(pATI, 0xADU, -1, 0x00U, pATIHW->ad);
            ATIModifyExtReg(pATI, 0xAEU, -1, 0x00U, pATIHW->ae);
        }
    }
    ATIModifyExtReg(pATI, 0xB0U, -1, 0x00U, pATIHW->b0);
    ATIModifyExtReg(pATI, 0xB1U, -1, 0x00U, pATIHW->b1);
    ATIModifyExtReg(pATI, 0xB3U, -1, 0x00U, pATIHW->b3);
    ATIModifyExtReg(pATI, 0xB5U, -1, 0x00U, pATIHW->b5);
    ATIModifyExtReg(pATI, 0xB6U, -1, 0x00U, pATIHW->b6);
    ATIModifyExtReg(pATI, 0xB8U, -1, 0x00U, pATIHW->b8);
    ATIModifyExtReg(pATI, 0xB9U, -1, 0x00U, pATIHW->b9);
    ATIModifyExtReg(pATI, 0xBAU, -1, 0x00U, pATIHW->ba);
    ATIModifyExtReg(pATI, 0xBDU, -1, 0x00U, pATIHW->bd);
}

#endif /* AVOID_CPIO */