Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
[linux-2.6] / drivers / usb / misc / sisusbvga / sisusb_init.c
1 /*
2  * sisusb - usb kernel driver for SiS315(E) based USB2VGA dongles
3  *
4  * Display mode initializing code
5  *
6  * Copyright (C) 2001-2005 by Thomas Winischhofer, Vienna, Austria
7  *
8  * If distributed as part of the Linux kernel, this code is licensed under the
9  * terms of the GPL v2.
10  *
11  * Otherwise, the following license terms apply:
12  *
13  * * Redistribution and use in source and binary forms, with or without
14  * * modification, are permitted provided that the following conditions
15  * * are met:
16  * * 1) Redistributions of source code must retain the above copyright
17  * *    notice, this list of conditions and the following disclaimer.
18  * * 2) Redistributions in binary form must reproduce the above copyright
19  * *    notice, this list of conditions and the following disclaimer in the
20  * *    documentation and/or other materials provided with the distribution.
21  * * 3) The name of the author may not be used to endorse or promote products
22  * *    derived from this software without specific prior written permission.
23  * *
24  * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25  * * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26  * * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27  * * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28  * * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29  * * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30  * * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31  * * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32  * * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33  * * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34  *
35  * Author:      Thomas Winischhofer <thomas@winischhofer.net>
36  *
37  */
38
39 #include <linux/module.h>
40 #include <linux/kernel.h>
41 #include <linux/errno.h>
42 #include <linux/poll.h>
43 #include <linux/init.h>
44 #include <linux/slab.h>
45 #include <linux/spinlock.h>
46 #include <linux/kref.h>
47
48 #include "sisusb.h"
49
50 #ifdef INCL_SISUSB_CON
51
52 #include "sisusb_init.h"
53
54 /*********************************************/
55 /*         POINTER INITIALIZATION            */
56 /*********************************************/
57
58 static void SiSUSB_InitPtr(struct SiS_Private *SiS_Pr)
59 {
60         SiS_Pr->SiS_ModeResInfo = SiSUSB_ModeResInfo;
61         SiS_Pr->SiS_StandTable = SiSUSB_StandTable;
62
63         SiS_Pr->SiS_SModeIDTable = SiSUSB_SModeIDTable;
64         SiS_Pr->SiS_EModeIDTable = SiSUSB_EModeIDTable;
65         SiS_Pr->SiS_RefIndex = SiSUSB_RefIndex;
66         SiS_Pr->SiS_CRT1Table = SiSUSB_CRT1Table;
67
68         SiS_Pr->SiS_VCLKData = SiSUSB_VCLKData;
69 }
70
71 /*********************************************/
72 /*          HELPER: SetReg, GetReg           */
73 /*********************************************/
74
75 static void
76 SiS_SetReg(struct SiS_Private *SiS_Pr, unsigned long port,
77            unsigned short index, unsigned short data)
78 {
79         sisusb_setidxreg(SiS_Pr->sisusb, port, index, data);
80 }
81
82 static void
83 SiS_SetRegByte(struct SiS_Private *SiS_Pr, unsigned long port,
84                unsigned short data)
85 {
86         sisusb_setreg(SiS_Pr->sisusb, port, data);
87 }
88
89 static unsigned char
90 SiS_GetReg(struct SiS_Private *SiS_Pr, unsigned long port, unsigned short index)
91 {
92         u8 data;
93
94         sisusb_getidxreg(SiS_Pr->sisusb, port, index, &data);
95
96         return data;
97 }
98
99 static unsigned char
100 SiS_GetRegByte(struct SiS_Private *SiS_Pr, unsigned long port)
101 {
102         u8 data;
103
104         sisusb_getreg(SiS_Pr->sisusb, port, &data);
105
106         return data;
107 }
108
109 static void
110 SiS_SetRegANDOR(struct SiS_Private *SiS_Pr, unsigned long port,
111                 unsigned short index, unsigned short DataAND,
112                 unsigned short DataOR)
113 {
114         sisusb_setidxregandor(SiS_Pr->sisusb, port, index, DataAND, DataOR);
115 }
116
117 static void
118 SiS_SetRegAND(struct SiS_Private *SiS_Pr, unsigned long port,
119               unsigned short index, unsigned short DataAND)
120 {
121         sisusb_setidxregand(SiS_Pr->sisusb, port, index, DataAND);
122 }
123
124 static void
125 SiS_SetRegOR(struct SiS_Private *SiS_Pr, unsigned long port,
126              unsigned short index, unsigned short DataOR)
127 {
128         sisusb_setidxregor(SiS_Pr->sisusb, port, index, DataOR);
129 }
130
131 /*********************************************/
132 /*      HELPER: DisplayOn, DisplayOff        */
133 /*********************************************/
134
135 static void SiS_DisplayOn(struct SiS_Private *SiS_Pr)
136 {
137         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x01, 0xDF);
138 }
139
140 /*********************************************/
141 /*        HELPER: Init Port Addresses        */
142 /*********************************************/
143
144 static void SiSUSBRegInit(struct SiS_Private *SiS_Pr, unsigned long BaseAddr)
145 {
146         SiS_Pr->SiS_P3c4 = BaseAddr + 0x14;
147         SiS_Pr->SiS_P3d4 = BaseAddr + 0x24;
148         SiS_Pr->SiS_P3c0 = BaseAddr + 0x10;
149         SiS_Pr->SiS_P3ce = BaseAddr + 0x1e;
150         SiS_Pr->SiS_P3c2 = BaseAddr + 0x12;
151         SiS_Pr->SiS_P3ca = BaseAddr + 0x1a;
152         SiS_Pr->SiS_P3c6 = BaseAddr + 0x16;
153         SiS_Pr->SiS_P3c7 = BaseAddr + 0x17;
154         SiS_Pr->SiS_P3c8 = BaseAddr + 0x18;
155         SiS_Pr->SiS_P3c9 = BaseAddr + 0x19;
156         SiS_Pr->SiS_P3cb = BaseAddr + 0x1b;
157         SiS_Pr->SiS_P3cc = BaseAddr + 0x1c;
158         SiS_Pr->SiS_P3cd = BaseAddr + 0x1d;
159         SiS_Pr->SiS_P3da = BaseAddr + 0x2a;
160         SiS_Pr->SiS_Part1Port = BaseAddr + SIS_CRT2_PORT_04;
161 }
162
163 /*********************************************/
164 /*             HELPER: GetSysFlags           */
165 /*********************************************/
166
167 static void SiS_GetSysFlags(struct SiS_Private *SiS_Pr)
168 {
169         SiS_Pr->SiS_MyCR63 = 0x63;
170 }
171
172 /*********************************************/
173 /*         HELPER: Init PCI & Engines        */
174 /*********************************************/
175
176 static void SiSInitPCIetc(struct SiS_Private *SiS_Pr)
177 {
178         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x20, 0xa1);
179         /*  - Enable 2D (0x40)
180          *  - Enable 3D (0x02)
181          *  - Enable 3D vertex command fetch (0x10)
182          *  - Enable 3D command parser (0x08)
183          *  - Enable 3D G/L transformation engine (0x80)
184          */
185         SiS_SetRegOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x1E, 0xDA);
186 }
187
188 /*********************************************/
189 /*        HELPER: SET SEGMENT REGISTERS      */
190 /*********************************************/
191
192 static void SiS_SetSegRegLower(struct SiS_Private *SiS_Pr, unsigned short value)
193 {
194         unsigned short temp;
195
196         value &= 0x00ff;
197         temp = SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3cb) & 0xf0;
198         temp |= (value >> 4);
199         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3cb, temp);
200         temp = SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3cd) & 0xf0;
201         temp |= (value & 0x0f);
202         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3cd, temp);
203 }
204
205 static void SiS_SetSegRegUpper(struct SiS_Private *SiS_Pr, unsigned short value)
206 {
207         unsigned short temp;
208
209         value &= 0x00ff;
210         temp = SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3cb) & 0x0f;
211         temp |= (value & 0xf0);
212         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3cb, temp);
213         temp = SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3cd) & 0x0f;
214         temp |= (value << 4);
215         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3cd, temp);
216 }
217
218 static void SiS_SetSegmentReg(struct SiS_Private *SiS_Pr, unsigned short value)
219 {
220         SiS_SetSegRegLower(SiS_Pr, value);
221         SiS_SetSegRegUpper(SiS_Pr, value);
222 }
223
224 static void SiS_ResetSegmentReg(struct SiS_Private *SiS_Pr)
225 {
226         SiS_SetSegmentReg(SiS_Pr, 0);
227 }
228
229 static void
230 SiS_SetSegmentRegOver(struct SiS_Private *SiS_Pr, unsigned short value)
231 {
232         unsigned short temp = value >> 8;
233
234         temp &= 0x07;
235         temp |= (temp << 4);
236         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x1d, temp);
237         SiS_SetSegmentReg(SiS_Pr, value);
238 }
239
240 static void SiS_ResetSegmentRegOver(struct SiS_Private *SiS_Pr)
241 {
242         SiS_SetSegmentRegOver(SiS_Pr, 0);
243 }
244
245 static void SiS_ResetSegmentRegisters(struct SiS_Private *SiS_Pr)
246 {
247         SiS_ResetSegmentReg(SiS_Pr);
248         SiS_ResetSegmentRegOver(SiS_Pr);
249 }
250
251 /*********************************************/
252 /*           HELPER: SearchModeID            */
253 /*********************************************/
254
255 static int
256 SiS_SearchModeID(struct SiS_Private *SiS_Pr, unsigned short *ModeNo,
257                  unsigned short *ModeIdIndex)
258 {
259         if ((*ModeNo) <= 0x13) {
260
261                 if ((*ModeNo) != 0x03)
262                         return 0;
263
264                 (*ModeIdIndex) = 0;
265
266         } else {
267
268                 for (*ModeIdIndex = 0;; (*ModeIdIndex)++) {
269
270                         if (SiS_Pr->SiS_EModeIDTable[*ModeIdIndex].Ext_ModeID ==
271                             (*ModeNo))
272                                 break;
273
274                         if (SiS_Pr->SiS_EModeIDTable[*ModeIdIndex].Ext_ModeID ==
275                             0xFF)
276                                 return 0;
277                 }
278
279         }
280
281         return 1;
282 }
283
284 /*********************************************/
285 /*            HELPER: ENABLE CRT1            */
286 /*********************************************/
287
288 static void SiS_HandleCRT1(struct SiS_Private *SiS_Pr)
289 {
290         /* Enable CRT1 gating */
291         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3d4, SiS_Pr->SiS_MyCR63, 0xbf);
292 }
293
294 /*********************************************/
295 /*           HELPER: GetColorDepth           */
296 /*********************************************/
297
298 static unsigned short
299 SiS_GetColorDepth(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
300                   unsigned short ModeIdIndex)
301 {
302         static const unsigned short ColorDepth[6] = { 1, 2, 4, 4, 6, 8 };
303         unsigned short modeflag;
304         short index;
305
306         if (ModeNo <= 0x13) {
307                 modeflag = SiS_Pr->SiS_SModeIDTable[ModeIdIndex].St_ModeFlag;
308         } else {
309                 modeflag = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].Ext_ModeFlag;
310         }
311
312         index = (modeflag & ModeTypeMask) - ModeEGA;
313         if (index < 0)
314                 index = 0;
315         return ColorDepth[index];
316 }
317
318 /*********************************************/
319 /*             HELPER: GetOffset             */
320 /*********************************************/
321
322 static unsigned short
323 SiS_GetOffset(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
324               unsigned short ModeIdIndex, unsigned short rrti)
325 {
326         unsigned short xres, temp, colordepth, infoflag;
327
328         infoflag = SiS_Pr->SiS_RefIndex[rrti].Ext_InfoFlag;
329         xres = SiS_Pr->SiS_RefIndex[rrti].XRes;
330
331         colordepth = SiS_GetColorDepth(SiS_Pr, ModeNo, ModeIdIndex);
332
333         temp = xres / 16;
334
335         if (infoflag & InterlaceMode)
336                 temp <<= 1;
337
338         temp *= colordepth;
339
340         if (xres % 16)
341                 temp += (colordepth >> 1);
342
343         return temp;
344 }
345
346 /*********************************************/
347 /*                   SEQ                     */
348 /*********************************************/
349
350 static void
351 SiS_SetSeqRegs(struct SiS_Private *SiS_Pr, unsigned short StandTableIndex)
352 {
353         unsigned char SRdata;
354         int i;
355
356         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x00, 0x03);
357
358         SRdata = SiS_Pr->SiS_StandTable[StandTableIndex].SR[0] | 0x20;
359         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x01, SRdata);
360
361         for (i = 2; i <= 4; i++) {
362                 SRdata = SiS_Pr->SiS_StandTable[StandTableIndex].SR[i - 1];
363                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, i, SRdata);
364         }
365 }
366
367 /*********************************************/
368 /*                  MISC                     */
369 /*********************************************/
370
371 static void
372 SiS_SetMiscRegs(struct SiS_Private *SiS_Pr, unsigned short StandTableIndex)
373 {
374         unsigned char Miscdata = SiS_Pr->SiS_StandTable[StandTableIndex].MISC;
375
376         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c2, Miscdata);
377 }
378
379 /*********************************************/
380 /*                  CRTC                     */
381 /*********************************************/
382
383 static void
384 SiS_SetCRTCRegs(struct SiS_Private *SiS_Pr, unsigned short StandTableIndex)
385 {
386         unsigned char CRTCdata;
387         unsigned short i;
388
389         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3d4, 0x11, 0x7f);
390
391         for (i = 0; i <= 0x18; i++) {
392                 CRTCdata = SiS_Pr->SiS_StandTable[StandTableIndex].CRTC[i];
393                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, i, CRTCdata);
394         }
395 }
396
397 /*********************************************/
398 /*                   ATT                     */
399 /*********************************************/
400
401 static void
402 SiS_SetATTRegs(struct SiS_Private *SiS_Pr, unsigned short StandTableIndex)
403 {
404         unsigned char ARdata;
405         unsigned short i;
406
407         for (i = 0; i <= 0x13; i++) {
408                 ARdata = SiS_Pr->SiS_StandTable[StandTableIndex].ATTR[i];
409                 SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3da);
410                 SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c0, i);
411                 SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c0, ARdata);
412         }
413         SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3da);
414         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c0, 0x14);
415         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c0, 0x00);
416
417         SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3da);
418         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c0, 0x20);
419         SiS_GetRegByte(SiS_Pr, SiS_Pr->SiS_P3da);
420 }
421
422 /*********************************************/
423 /*                   GRC                     */
424 /*********************************************/
425
426 static void
427 SiS_SetGRCRegs(struct SiS_Private *SiS_Pr, unsigned short StandTableIndex)
428 {
429         unsigned char GRdata;
430         unsigned short i;
431
432         for (i = 0; i <= 0x08; i++) {
433                 GRdata = SiS_Pr->SiS_StandTable[StandTableIndex].GRC[i];
434                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3ce, i, GRdata);
435         }
436
437         if (SiS_Pr->SiS_ModeType > ModeVGA) {
438                 /* 256 color disable */
439                 SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3ce, 0x05, 0xBF);
440         }
441 }
442
443 /*********************************************/
444 /*          CLEAR EXTENDED REGISTERS         */
445 /*********************************************/
446
447 static void SiS_ClearExt1Regs(struct SiS_Private *SiS_Pr, unsigned short ModeNo)
448 {
449         int i;
450
451         for (i = 0x0A; i <= 0x0E; i++) {
452                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, i, 0x00);
453         }
454
455         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x37, 0xFE);
456 }
457
458 /*********************************************/
459 /*              Get rate index               */
460 /*********************************************/
461
462 static unsigned short
463 SiS_GetRatePtr(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
464                unsigned short ModeIdIndex)
465 {
466         unsigned short rrti, i, index, temp;
467
468         if (ModeNo <= 0x13)
469                 return 0xFFFF;
470
471         index = SiS_GetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x33) & 0x0F;
472         if (index > 0)
473                 index--;
474
475         rrti = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].REFindex;
476         ModeNo = SiS_Pr->SiS_RefIndex[rrti].ModeID;
477
478         i = 0;
479         do {
480                 if (SiS_Pr->SiS_RefIndex[rrti + i].ModeID != ModeNo)
481                         break;
482
483                 temp =
484                     SiS_Pr->SiS_RefIndex[rrti + i].Ext_InfoFlag & ModeTypeMask;
485                 if (temp < SiS_Pr->SiS_ModeType)
486                         break;
487
488                 i++;
489                 index--;
490         } while (index != 0xFFFF);
491
492         i--;
493
494         return (rrti + i);
495 }
496
497 /*********************************************/
498 /*                  SYNC                     */
499 /*********************************************/
500
501 static void SiS_SetCRT1Sync(struct SiS_Private *SiS_Pr, unsigned short rrti)
502 {
503         unsigned short sync = SiS_Pr->SiS_RefIndex[rrti].Ext_InfoFlag >> 8;
504         sync &= 0xC0;
505         sync |= 0x2f;
506         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c2, sync);
507 }
508
509 /*********************************************/
510 /*                  CRTC/2                   */
511 /*********************************************/
512
513 static void
514 SiS_SetCRT1CRTC(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
515                 unsigned short ModeIdIndex, unsigned short rrti)
516 {
517         unsigned char index;
518         unsigned short temp, i, j, modeflag;
519
520         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3d4, 0x11, 0x7f);
521
522         modeflag = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].Ext_ModeFlag;
523
524         index = SiS_Pr->SiS_RefIndex[rrti].Ext_CRT1CRTC;
525
526         for (i = 0, j = 0; i <= 7; i++, j++) {
527                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, j,
528                            SiS_Pr->SiS_CRT1Table[index].CR[i]);
529         }
530         for (j = 0x10; i <= 10; i++, j++) {
531                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, j,
532                            SiS_Pr->SiS_CRT1Table[index].CR[i]);
533         }
534         for (j = 0x15; i <= 12; i++, j++) {
535                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, j,
536                            SiS_Pr->SiS_CRT1Table[index].CR[i]);
537         }
538         for (j = 0x0A; i <= 15; i++, j++) {
539                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, j,
540                            SiS_Pr->SiS_CRT1Table[index].CR[i]);
541         }
542
543         temp = SiS_Pr->SiS_CRT1Table[index].CR[16] & 0xE0;
544         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x0E, temp);
545
546         temp = ((SiS_Pr->SiS_CRT1Table[index].CR[16]) & 0x01) << 5;
547         if (modeflag & DoubleScanMode)
548                 temp |= 0x80;
549         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3d4, 0x09, 0x5F, temp);
550
551         if (SiS_Pr->SiS_ModeType > ModeVGA)
552                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x14, 0x4F);
553 }
554
555 /*********************************************/
556 /*               OFFSET & PITCH              */
557 /*********************************************/
558 /*  (partly overruled by SetPitch() in XF86) */
559 /*********************************************/
560
561 static void
562 SiS_SetCRT1Offset(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
563                   unsigned short ModeIdIndex, unsigned short rrti)
564 {
565         unsigned short du = SiS_GetOffset(SiS_Pr, ModeNo, ModeIdIndex, rrti);
566         unsigned short infoflag = SiS_Pr->SiS_RefIndex[rrti].Ext_InfoFlag;
567         unsigned short temp;
568
569         temp = (du >> 8) & 0x0f;
570         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x0E, 0xF0, temp);
571
572         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x13, (du & 0xFF));
573
574         if (infoflag & InterlaceMode)
575                 du >>= 1;
576
577         du <<= 5;
578         temp = (du >> 8) & 0xff;
579         if (du & 0xff)
580                 temp++;
581         temp++;
582         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x10, temp);
583 }
584
585 /*********************************************/
586 /*                  VCLK                     */
587 /*********************************************/
588
589 static void
590 SiS_SetCRT1VCLK(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
591                 unsigned short rrti)
592 {
593         unsigned short index = SiS_Pr->SiS_RefIndex[rrti].Ext_CRTVCLK;
594         unsigned short clka = SiS_Pr->SiS_VCLKData[index].SR2B;
595         unsigned short clkb = SiS_Pr->SiS_VCLKData[index].SR2C;
596
597         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x31, 0xCF);
598
599         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x2B, clka);
600         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x2C, clkb);
601         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x2D, 0x01);
602 }
603
604 /*********************************************/
605 /*                  FIFO                     */
606 /*********************************************/
607
608 static void
609 SiS_SetCRT1FIFO_310(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
610                     unsigned short mi)
611 {
612         unsigned short modeflag = SiS_Pr->SiS_EModeIDTable[mi].Ext_ModeFlag;
613
614         /* disable auto-threshold */
615         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x3D, 0xFE);
616
617         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x08, 0xAE);
618         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x09, 0xF0);
619
620         if (ModeNo <= 0x13)
621                 return;
622
623         if ((!(modeflag & DoubleScanMode)) || (!(modeflag & HalfDCLK))) {
624                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x08, 0x34);
625                 SiS_SetRegOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x3D, 0x01);
626         }
627 }
628
629 /*********************************************/
630 /*              MODE REGISTERS               */
631 /*********************************************/
632
633 static void
634 SiS_SetVCLKState(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
635                  unsigned short rrti)
636 {
637         unsigned short data = 0, VCLK = 0, index = 0;
638
639         if (ModeNo > 0x13) {
640                 index = SiS_Pr->SiS_RefIndex[rrti].Ext_CRTVCLK;
641                 VCLK = SiS_Pr->SiS_VCLKData[index].CLOCK;
642         }
643
644         if (VCLK >= 166)
645                 data |= 0x0c;
646         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x32, 0xf3, data);
647
648         if (VCLK >= 166)
649                 SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x1f, 0xe7);
650
651         /* DAC speed */
652         data = 0x03;
653         if (VCLK >= 260)
654                 data = 0x00;
655         else if (VCLK >= 160)
656                 data = 0x01;
657         else if (VCLK >= 135)
658                 data = 0x02;
659
660         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x07, 0xF8, data);
661 }
662
663 static void
664 SiS_SetCRT1ModeRegs(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
665                     unsigned short ModeIdIndex, unsigned short rrti)
666 {
667         unsigned short data, infoflag = 0, modeflag;
668
669         if (ModeNo <= 0x13)
670                 modeflag = SiS_Pr->SiS_SModeIDTable[ModeIdIndex].St_ModeFlag;
671         else {
672                 modeflag = SiS_Pr->SiS_EModeIDTable[ModeIdIndex].Ext_ModeFlag;
673                 infoflag = SiS_Pr->SiS_RefIndex[rrti].Ext_InfoFlag;
674         }
675
676         /* Disable DPMS */
677         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x1F, 0x3F);
678
679         data = 0;
680         if (ModeNo > 0x13) {
681                 if (SiS_Pr->SiS_ModeType > ModeEGA) {
682                         data |= 0x02;
683                         data |= ((SiS_Pr->SiS_ModeType - ModeVGA) << 2);
684                 }
685                 if (infoflag & InterlaceMode)
686                         data |= 0x20;
687         }
688         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x06, 0xC0, data);
689
690         data = 0;
691         if (infoflag & InterlaceMode) {
692                 /* data = (Hsync / 8) - ((Htotal / 8) / 2) + 3 */
693                 unsigned short hrs =
694                     (SiS_GetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x04) |
695                      ((SiS_GetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x0b) & 0xc0) << 2))
696                     - 3;
697                 unsigned short hto =
698                     (SiS_GetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x00) |
699                      ((SiS_GetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x0b) & 0x03) << 8))
700                     + 5;
701                 data = hrs - (hto >> 1) + 3;
702         }
703         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x19, (data & 0xFF));
704         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3d4, 0x1a, 0xFC, (data >> 8));
705
706         if (modeflag & HalfDCLK)
707                 SiS_SetRegOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x01, 0x08);
708
709         data = 0;
710         if (modeflag & LineCompareOff)
711                 data = 0x08;
712         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x0F, 0xB7, data);
713
714         if ((SiS_Pr->SiS_ModeType == ModeEGA) && (ModeNo > 0x13))
715                 SiS_SetRegOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x0F, 0x40);
716
717         SiS_SetRegAND(SiS_Pr, SiS_Pr->SiS_P3c4, 0x31, 0xfb);
718
719         data = 0x60;
720         if (SiS_Pr->SiS_ModeType != ModeText) {
721                 data ^= 0x60;
722                 if (SiS_Pr->SiS_ModeType != ModeEGA)
723                         data ^= 0xA0;
724         }
725         SiS_SetRegANDOR(SiS_Pr, SiS_Pr->SiS_P3c4, 0x21, 0x1F, data);
726
727         SiS_SetVCLKState(SiS_Pr, ModeNo, rrti);
728
729         if (SiS_GetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x31) & 0x40)
730                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x52, 0x2c);
731         else
732                 SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x52, 0x6c);
733 }
734
735 /*********************************************/
736 /*                 LOAD DAC                  */
737 /*********************************************/
738
739 static void
740 SiS_WriteDAC(struct SiS_Private *SiS_Pr, unsigned long DACData,
741              unsigned short shiftflag, unsigned short dl, unsigned short ah,
742              unsigned short al, unsigned short dh)
743 {
744         unsigned short d1, d2, d3;
745
746         switch (dl) {
747         case 0:
748                 d1 = dh;
749                 d2 = ah;
750                 d3 = al;
751                 break;
752         case 1:
753                 d1 = ah;
754                 d2 = al;
755                 d3 = dh;
756                 break;
757         default:
758                 d1 = al;
759                 d2 = dh;
760                 d3 = ah;
761         }
762         SiS_SetRegByte(SiS_Pr, DACData, (d1 << shiftflag));
763         SiS_SetRegByte(SiS_Pr, DACData, (d2 << shiftflag));
764         SiS_SetRegByte(SiS_Pr, DACData, (d3 << shiftflag));
765 }
766
767 static void
768 SiS_LoadDAC(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
769             unsigned short mi)
770 {
771         unsigned short data, data2, time, i, j, k, m, n, o;
772         unsigned short si, di, bx, sf;
773         unsigned long DACAddr, DACData;
774         const unsigned char *table = NULL;
775
776         if (ModeNo < 0x13)
777                 data = SiS_Pr->SiS_SModeIDTable[mi].St_ModeFlag;
778         else
779                 data = SiS_Pr->SiS_EModeIDTable[mi].Ext_ModeFlag;
780
781         data &= DACInfoFlag;
782
783         j = time = 64;
784         if (data == 0x00)
785                 table = SiS_MDA_DAC;
786         else if (data == 0x08)
787                 table = SiS_CGA_DAC;
788         else if (data == 0x10)
789                 table = SiS_EGA_DAC;
790         else {
791                 j = 16;
792                 time = 256;
793                 table = SiS_VGA_DAC;
794         }
795
796         DACAddr = SiS_Pr->SiS_P3c8;
797         DACData = SiS_Pr->SiS_P3c9;
798         sf = 0;
799         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c6, 0xFF);
800
801         SiS_SetRegByte(SiS_Pr, DACAddr, 0x00);
802
803         for (i = 0; i < j; i++) {
804                 data = table[i];
805                 for (k = 0; k < 3; k++) {
806                         data2 = 0;
807                         if (data & 0x01)
808                                 data2 += 0x2A;
809                         if (data & 0x02)
810                                 data2 += 0x15;
811                         SiS_SetRegByte(SiS_Pr, DACData, (data2 << sf));
812                         data >>= 2;
813                 }
814         }
815
816         if (time == 256) {
817                 for (i = 16; i < 32; i++) {
818                         data = table[i] << sf;
819                         for (k = 0; k < 3; k++)
820                                 SiS_SetRegByte(SiS_Pr, DACData, data);
821                 }
822                 si = 32;
823                 for (m = 0; m < 9; m++) {
824                         di = si;
825                         bx = si + 4;
826                         for (n = 0; n < 3; n++) {
827                                 for (o = 0; o < 5; o++) {
828                                         SiS_WriteDAC(SiS_Pr, DACData, sf, n,
829                                                      table[di], table[bx],
830                                                      table[si]);
831                                         si++;
832                                 }
833                                 si -= 2;
834                                 for (o = 0; o < 3; o++) {
835                                         SiS_WriteDAC(SiS_Pr, DACData, sf, n,
836                                                      table[di], table[si],
837                                                      table[bx]);
838                                         si--;
839                                 }
840                         }
841                         si += 5;
842                 }
843         }
844 }
845
846 /*********************************************/
847 /*         SET CRT1 REGISTER GROUP           */
848 /*********************************************/
849
850 static void
851 SiS_SetCRT1Group(struct SiS_Private *SiS_Pr, unsigned short ModeNo,
852                  unsigned short ModeIdIndex)
853 {
854         unsigned short StandTableIndex, rrti;
855
856         SiS_Pr->SiS_CRT1Mode = ModeNo;
857
858         if (ModeNo <= 0x13)
859                 StandTableIndex = 0;
860         else
861                 StandTableIndex = 1;
862
863         SiS_ResetSegmentRegisters(SiS_Pr);
864         SiS_SetSeqRegs(SiS_Pr, StandTableIndex);
865         SiS_SetMiscRegs(SiS_Pr, StandTableIndex);
866         SiS_SetCRTCRegs(SiS_Pr, StandTableIndex);
867         SiS_SetATTRegs(SiS_Pr, StandTableIndex);
868         SiS_SetGRCRegs(SiS_Pr, StandTableIndex);
869         SiS_ClearExt1Regs(SiS_Pr, ModeNo);
870
871         rrti = SiS_GetRatePtr(SiS_Pr, ModeNo, ModeIdIndex);
872
873         if (rrti != 0xFFFF) {
874                 SiS_SetCRT1Sync(SiS_Pr, rrti);
875                 SiS_SetCRT1CRTC(SiS_Pr, ModeNo, ModeIdIndex, rrti);
876                 SiS_SetCRT1Offset(SiS_Pr, ModeNo, ModeIdIndex, rrti);
877                 SiS_SetCRT1VCLK(SiS_Pr, ModeNo, rrti);
878         }
879
880         SiS_SetCRT1FIFO_310(SiS_Pr, ModeNo, ModeIdIndex);
881
882         SiS_SetCRT1ModeRegs(SiS_Pr, ModeNo, ModeIdIndex, rrti);
883
884         SiS_LoadDAC(SiS_Pr, ModeNo, ModeIdIndex);
885
886         SiS_DisplayOn(SiS_Pr);
887 }
888
889 /*********************************************/
890 /*                 SiSSetMode()              */
891 /*********************************************/
892
893 int SiSUSBSetMode(struct SiS_Private *SiS_Pr, unsigned short ModeNo)
894 {
895         unsigned short ModeIdIndex;
896         unsigned long BaseAddr = SiS_Pr->IOAddress;
897
898         SiSUSB_InitPtr(SiS_Pr);
899         SiSUSBRegInit(SiS_Pr, BaseAddr);
900         SiS_GetSysFlags(SiS_Pr);
901
902         if (!(SiS_SearchModeID(SiS_Pr, &ModeNo, &ModeIdIndex)))
903                 return 0;
904
905         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3c4, 0x05, 0x86);
906
907         SiSInitPCIetc(SiS_Pr);
908
909         ModeNo &= 0x7f;
910
911         SiS_Pr->SiS_ModeType =
912             SiS_Pr->SiS_EModeIDTable[ModeIdIndex].Ext_ModeFlag & ModeTypeMask;
913
914         SiS_Pr->SiS_SetFlag = LowModeTests;
915
916         /* Set mode on CRT1 */
917         SiS_SetCRT1Group(SiS_Pr, ModeNo, ModeIdIndex);
918
919         SiS_HandleCRT1(SiS_Pr);
920
921         SiS_DisplayOn(SiS_Pr);
922         SiS_SetRegByte(SiS_Pr, SiS_Pr->SiS_P3c6, 0xFF);
923
924         /* Store mode number */
925         SiS_SetReg(SiS_Pr, SiS_Pr->SiS_P3d4, 0x34, ModeNo);
926
927         return 1;
928 }
929
930 int SiSUSBSetVESAMode(struct SiS_Private *SiS_Pr, unsigned short VModeNo)
931 {
932         unsigned short ModeNo = 0;
933         int i;
934
935         SiSUSB_InitPtr(SiS_Pr);
936
937         if (VModeNo == 0x03) {
938
939                 ModeNo = 0x03;
940
941         } else {
942
943                 i = 0;
944                 do {
945
946                         if (SiS_Pr->SiS_EModeIDTable[i].Ext_VESAID == VModeNo) {
947                                 ModeNo = SiS_Pr->SiS_EModeIDTable[i].Ext_ModeID;
948                                 break;
949                         }
950
951                 } while (SiS_Pr->SiS_EModeIDTable[i++].Ext_ModeID != 0xff);
952
953         }
954
955         if (!ModeNo)
956                 return 0;
957
958         return SiSUSBSetMode(SiS_Pr, ModeNo);
959 }
960
961 #endif /* INCL_SISUSB_CON */