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
257
258
259
260
261
262
263
264
265
266
267
268
269
|
/*
* Copyright (c) 2007 NVIDIA, Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <strings.h>
#include "g80_type.h"
#include "g80_ddc.h"
#include "g80_display.h"
#include <xf86DDC.h>
static unsigned G80FindLoadVal(const unsigned char *table1)
{
const unsigned char *p = table1;
int count;
const CARD32 def = 340;
for(p = table1; *(CARD16*)p != 0xb8ff && p < table1 + 64000; p += 2);
if(p == table1 + 64000)
return def;
p += 2;
if(*(CARD32*)p != 0x544942)
return def;
p += 4;
if(*(CARD16*)p != 0x100)
return def;
p += 2;
if(*p != 12)
return def;
p++;
if(*p != 6)
return def;
p++;
count = *p;
p += 2;
for(; *p != 'A' && count >= 0; count--, p += 6);
if(count == -1)
return def;
p += 4;
p = table1 + *(CARD16*)p;
p = table1 + *(CARD16*)p;
if(p[0] != 0x10 || p[1] != 4 || p[2] != 4 || p[3] != 2)
return def;
return *(CARD32*)(p + 4) & 0x3ff;
}
static Bool G80ReadPortMapping(int scrnIndex, G80Ptr pNv)
{
unsigned char *table2;
unsigned char headerSize, entries;
int i;
CARD16 a;
CARD32 b;
/* Clear the i2c map to invalid */
for(i = 0; i < 4; i++)
pNv->i2cMap[i].dac = pNv->i2cMap[i].sor = -1;
if(*(CARD16*)pNv->table1 != 0xaa55) goto fail;
a = *(CARD16*)(pNv->table1 + 0x36);
table2 = (unsigned char*)pNv->table1 + a;
if(table2[0] != 0x40) goto fail;
b = *(CARD32*)(table2 + 6);
if(b != 0x4edcbdcb) goto fail;
headerSize = table2[1];
entries = table2[2];
for(i = 0; i < entries; i++) {
int type, port;
ORNum or;
b = *(CARD32*)&table2[headerSize + 8*i];
type = b & 0xf;
port = (b >> 4) & 0xf;
or = ffs((b >> 24) & 0xf) - 1;
if(type < 4 && port != 0xf) {
switch(type) {
case 0: /* CRT */
case 1: /* TV */
if(pNv->i2cMap[port].dac != -1) {
xf86DrvMsg(scrnIndex, X_WARNING,
"DDC routing table corrupt! DAC %i -> %i "
"for port %i\n",
or, pNv->i2cMap[port].dac, port);
}
pNv->i2cMap[port].dac = or;
break;
case 2: /* TMDS */
case 3: /* LVDS */
if(pNv->i2cMap[port].sor != -1)
xf86DrvMsg(scrnIndex, X_WARNING,
"DDC routing table corrupt! SOR %i -> %i "
"for port %i\n",
or, pNv->i2cMap[port].sor, port);
pNv->i2cMap[port].sor = or;
break;
}
}
}
xf86DrvMsg(scrnIndex, X_PROBED, "I2C map:\n");
for(i = 0; i < 4; i++) {
if(pNv->i2cMap[i].dac != -1)
xf86DrvMsg(scrnIndex, X_PROBED, " Bus %i -> DAC%i\n", i, pNv->i2cMap[i].dac);
if(pNv->i2cMap[i].sor != -1)
xf86DrvMsg(scrnIndex, X_PROBED, " Bus %i -> SOR%i\n", i, pNv->i2cMap[i].sor);
}
pNv->loadVal = G80FindLoadVal(pNv->table1);
xf86DrvMsg(scrnIndex, X_PROBED, "Load detection: %d\n", pNv->loadVal);
return TRUE;
fail:
xf86DrvMsg(scrnIndex, X_ERROR, "Couldn't find the DDC routing table. "
"Mode setting will probably fail!\n");
return FALSE;
}
static void G80_I2CPutBits(I2CBusPtr b, int clock, int data)
{
G80Ptr pNv = G80PTR(xf86Screens[b->scrnIndex]);
const int off = b->DriverPrivate.val;
pNv->reg[(0x0000E138+off)/4] = 4 | clock | data << 1;
}
static void G80_I2CGetBits(I2CBusPtr b, int *clock, int *data)
{
G80Ptr pNv = G80PTR(xf86Screens[b->scrnIndex]);
const int off = b->DriverPrivate.val;
unsigned char val;
val = pNv->reg[(0x0000E138+off)/4];
*clock = !!(val & 1);
*data = !!(val & 2);
}
static xf86MonPtr G80ProbeDDCBus(ScrnInfoPtr pScrn, int bus)
{
G80Ptr pNv = G80PTR(pScrn);
I2CBusPtr i2c;
xf86MonPtr monInfo = NULL;
const int off = bus * 0x18;
/* Allocate the I2C bus structure */
i2c = xf86CreateI2CBusRec();
if(!i2c) return NULL;
i2c->BusName = "DDC";
i2c->scrnIndex = pScrn->scrnIndex;
i2c->I2CPutBits = G80_I2CPutBits;
i2c->I2CGetBits = G80_I2CGetBits;
i2c->ByteTimeout = 2200; /* VESA DDC spec 3 p. 43 (+10 %) */
i2c->StartTimeout = 550;
i2c->BitTimeout = 40;
i2c->ByteTimeout = 40;
i2c->AcknTimeout = 40;
i2c->DriverPrivate.val = off;
if(!xf86I2CBusInit(i2c)) goto done;
pNv->reg[(0x0000E138+off)/4] = 7;
xf86DrvMsg(pScrn->scrnIndex, X_INFO,
"Probing for EDID on I2C bus %i...\n", bus);
monInfo = xf86DoEDID_DDC2(pScrn->scrnIndex, i2c);
pNv->reg[(0x0000E138+off)/4] = 3;
if(monInfo) {
xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
"DDC detected a %s:\n", monInfo->features.input_type ?
"DFP" : "CRT");
xf86PrintEDID(monInfo);
} else {
xf86DrvMsg(pScrn->scrnIndex, X_INFO, " ... none found\n");
}
done:
xf86DestroyI2CBusRec(i2c, TRUE, TRUE);
return monInfo;
}
/*
* Try DDC on each bus until we find one that works.
*/
Bool G80ProbeDDC(ScrnInfoPtr pScrn)
{
G80Ptr pNv = G80PTR(pScrn);
xf86MonPtr monInfo;
int port;
Bool flatPanel;
if(!G80ReadPortMapping(pScrn->scrnIndex, pNv))
return FALSE;
for(port = 0; port < 4; port++) {
if(pNv->i2cMap[port].dac == -1 && pNv->i2cMap[port].sor == -1)
/* No outputs on this port. Skip it. */
continue;
monInfo = G80ProbeDDCBus(pScrn, port);
if(!monInfo)
/* No EDID on this port. */
continue;
flatPanel = (monInfo->features.input_type == 1);
if(pNv->i2cMap[port].dac != -1 &&
G80DispDetectLoad(pScrn, pNv->i2cMap[port].dac)) {
pNv->orType = DAC;
pNv->or = pNv->i2cMap[port].dac;
} else if(pNv->i2cMap[port].sor != -1) {
pNv->orType = SOR;
pNv->or = pNv->i2cMap[port].sor;
} else {
xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
"Saw an EDID on I2C port %i but no DAC load was "
"detected and no SOR is connected to this port. Using "
"DAC%i.\n", port,
pNv->or);
pNv->orType = DAC;
pNv->or = pNv->i2cMap[port].dac;
}
xf86DrvMsg(pScrn->scrnIndex, X_PROBED,
"Found a %s on I2C port %i, assigning %s%i\n",
flatPanel ? "flat panel" : "CRT",
port, pNv->orType == SOR ? "SOR" : "DAC", pNv->or);
pScrn->monitor->DDC = monInfo;
xf86SetDDCproperties(pScrn, monInfo);
return TRUE;
}
return FALSE;
}
|
