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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/trident/tridenthelper.c,v 1.11 1999/10/13 20:02:30 alanh Exp $ */
#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86_ansic.h"
#include "xf86Version.h"
#include "xf86PciInfo.h"
#include "xf86Pci.h"
#include "vgaHW.h"
#include "trident.h"
#include "trident_regs.h"
static void IsClearTV(ScrnInfoPtr pScrn);
void
TGUISetClock(ScrnInfoPtr pScrn, int clock, CARD8 *a, CARD8 *b)
{
TRIDENTPtr pTrident = TRIDENTPTR(pScrn);
int powerup[4] = { 1,2,4,8 };
int clock_diff = 750;
int freq, ffreq;
int m, n, k;
int p, q, r, s;
int startn, endn;
int endm, endk;
p = q = r = s = 0;
IsClearTV(pScrn);
if (pTrident->NewClockCode)
{
startn = 64;
endn = 255;
endm = 63;
endk = 3;
}
else
{
startn = 0;
endn = 121;
endm = 31;
endk = 1;
}
freq = clock;
for (k=0;k<=endk;k++)
for (n=startn;n<=endn;n++)
for (m=1;m<=endm;m++)
{
ffreq = ( ( ((n + 8) * pTrident->frequency) / ((m + 2) * powerup[k]) ) * 1000);
if ((ffreq > freq - clock_diff) && (ffreq < freq + clock_diff))
{
/*
* It seems that the 9440 docs have this STRICT limitation, although
* most 9440 boards seem to cope. 96xx/Cyber chips don't need this limit
* so, I'm gonna remove it and it allows lower clocks < 25.175 too !
*/
#ifdef STRICT
if ( (n+8)*100/(m+2) < 978 && (n+8)*100/(m+2) > 349 ) {
#endif
clock_diff = (freq > ffreq) ? freq - ffreq : ffreq - freq;
p = n; q = m; r = k; s = ffreq;
#ifdef STRICT
}
#endif
}
}
if (s == 0)
{
FatalError("Unable to set programmable clock.\n"
"Frequency %d is not a valid clock.\n"
"Please modify XF86Config for a new clock.\n",
freq);
}
if (pTrident->NewClockCode)
{
/* N is all 8bits */
*a = p;
/* M is first 6bits, with K last 2bits */
*b = (q & 0x3F) | (r << 6);
}
else
{
/* N is first 7bits, first M bit is 8th bit */
*a = ((1 & q) << 7) | p;
/* first 4bits are rest of M, 1bit for K value */
*b = (((q & 0xFE) >> 1) | (r << 4));
}
}
static void
IsClearTV(ScrnInfoPtr pScrn)
{
int vgaIOBase = VGAHWPTR(pScrn)->IOBase;
TRIDENTPtr pTrident = TRIDENTPTR(pScrn);
CARD8 temp;
if (pTrident->frequency != 0) return;
OUTB(vgaIOBase + 4, 0xC0);
temp = INB(vgaIOBase + 5);
if (temp & 0x80)
pTrident->frequency = PAL;
else
pTrident->frequency = NTSC;
}
float
CalculateMCLK(ScrnInfoPtr pScrn)
{
int vgaIOBase = VGAHWPTR(pScrn)->IOBase;
TRIDENTPtr pTrident = TRIDENTPTR(pScrn);
int a,b;
int m,n,k;
float freq = 0.0;
int powerup[4] = { 1,2,4,8 };
CARD8 temp;
if (pTrident->HasSGRAM) {
OUTB(vgaIOBase + 4, 0x28);
switch(INB(vgaIOBase + 5) & 0x07) {
case 0:
freq = 60;
break;
case 1:
freq = 78;
break;
case 2:
freq = 90;
break;
case 3:
freq = 120;
break;
case 4:
freq = 66;
break;
case 5:
freq = 83;
break;
case 6:
freq = 100;
break;
case 7:
freq = 132;
break;
}
} else {
OUTB(0x3C4, NewMode1);
temp = INB(0x3C5);
OUTB(0x3C5, 0xC2);
if (!Is3Dchip) {
a = INB(0x43C6);
b = INB(0x43C7);
} else {
OUTB(0x3C4, 0x16);
a = INB(0x3C5);
OUTB(0x3C4, 0x17);
b = INB(0x3C5);
}
OUTB(0x3C4, NewMode1);
OUTB(0x3C5, temp);
IsClearTV(pScrn);
if (pTrident->NewClockCode) {
m = b & 0x3F;
n = a;
k = (b & 0xC0) >> 6;
} else {
m = (a & 0x07);
k = (b & 0x02) >> 1;
n = ((a & 0xF8)>>3)|((b&0x01)<<5);
}
freq = ((n+8)*pTrident->frequency)/((m+2)*powerup[k]);
}
return (freq);
}
void
TGUISetMCLK(ScrnInfoPtr pScrn, int clock, CARD8 *a, CARD8 *b)
{
TRIDENTPtr pTrident = TRIDENTPTR(pScrn);
int powerup[4] = { 1,2,4,8 };
int clock_diff = 750;
int freq, ffreq;
int m,n,k;
int p, q, r, s;
int startn, endn;
int endm, endk;
p = q = r = s = 0;
IsClearTV(pScrn);
if (pTrident->NewClockCode)
{
startn = 64;
endn = 255;
endm = 63;
endk = 3;
}
else
{
startn = 0;
endn = 121;
endm = 31;
endk = 1;
}
freq = clock;
if (!pTrident->HasSGRAM) {
for (k=0;k<=endk;k++)
for (n=startn;n<=endn;n++)
for (m=1;m<=endm;m++) {
ffreq = ((((n+8)*pTrident->frequency)/((m+2)*powerup[k]))*1000);
if ((ffreq > freq - clock_diff) && (ffreq < freq + clock_diff))
{
clock_diff = (freq > ffreq) ? freq - ffreq : ffreq - freq;
p = n; q = m; r = k; s = ffreq;
}
}
if (s == 0)
{
FatalError("Unable to set memory clock.\n"
"Frequency %d is not a valid clock.\n"
"Please modify XF86Config for a new clock.\n",
freq);
}
if (pTrident->NewClockCode)
{
/* N is all 8bits */
*a = p;
/* M is first 6bits, with K last 2bits */
*b = (q & 0x3F) | (r << 6);
}
else
{
/* N is first 7bits, first M bit is 8th bit */
*a = ((1 & q) << 7) | p;
/* first 4bits are rest of M, 1bit for K value */
*b = (((q & 0xFE) >> 1) | (r << 4));
}
}
}
|
