aboutsummaryrefslogtreecommitdiff
path: root/drivers/video/pm3fb.c
blob: 68089d1456c25167c0ece4bc5789536e8b2eef6f (plain)
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
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
/*
 *  linux/drivers/video/pm3fb.c -- 3DLabs Permedia3 frame buffer device
 *
 *  Copyright (C) 2001 Romain Dolbeau <romain@dolbeau.org>.
 *
 *  Ported to 2.6 kernel on 1 May 2007 by Krzysztof Helt <krzysztof.h1@wp.pl>
 *	based on pm2fb.c
 *
 *  Based on code written by:
 *	   Sven Luther, <luther@dpt-info.u-strasbg.fr>
 *	   Alan Hourihane, <alanh@fairlite.demon.co.uk>
 *	   Russell King, <rmk@arm.linux.org.uk>
 *  Based on linux/drivers/video/skeletonfb.c:
 *	Copyright (C) 1997 Geert Uytterhoeven
 *  Based on linux/driver/video/pm2fb.c:
 *	Copyright (C) 1998-1999 Ilario Nardinocchi (nardinoc@CS.UniBO.IT)
 *	Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif

#include <video/pm3fb.h>

#if !defined(CONFIG_PCI)
#error "Only generic PCI cards supported."
#endif

#undef PM3FB_MASTER_DEBUG
#ifdef PM3FB_MASTER_DEBUG
#define DPRINTK(a, b...)	\
	printk(KERN_DEBUG "pm3fb: %s: " a, __func__ , ## b)
#else
#define DPRINTK(a, b...)
#endif

#define PM3_PIXMAP_SIZE	(2048 * 4)

/*
 * Driver data
 */
static int hwcursor = 1;
static char *mode_option __devinitdata;
static int noaccel __devinitdata;

/* mtrr option */
#ifdef CONFIG_MTRR
static int nomtrr __devinitdata;
#endif

/*
 * This structure defines the hardware state of the graphics card. Normally
 * you place this in a header file in linux/include/video. This file usually
 * also includes register information. That allows other driver subsystems
 * and userland applications the ability to use the same header file to
 * avoid duplicate work and easy porting of software.
 */
struct pm3_par {
	unsigned char	__iomem *v_regs;/* virtual address of p_regs */
	u32		video;		/* video flags before blanking */
	u32		base;		/* screen base in 128 bits unit */
	u32		palette[16];
	int		mtrr_handle;
};

/*
 * Here we define the default structs fb_fix_screeninfo and fb_var_screeninfo
 * if we don't use modedb. If we do use modedb see pm3fb_init how to use it
 * to get a fb_var_screeninfo. Otherwise define a default var as well.
 */
static struct fb_fix_screeninfo pm3fb_fix __devinitdata = {
	.id =		"Permedia3",
	.type =		FB_TYPE_PACKED_PIXELS,
	.visual =	FB_VISUAL_PSEUDOCOLOR,
	.xpanstep =	1,
	.ypanstep =	1,
	.ywrapstep =	0,
	.accel =	FB_ACCEL_3DLABS_PERMEDIA3,
};

/*
 * Utility functions
 */

static inline u32 PM3_READ_REG(struct pm3_par *par, s32 off)
{
	return fb_readl(par->v_regs + off);
}

static inline void PM3_WRITE_REG(struct pm3_par *par, s32 off, u32 v)
{
	fb_writel(v, par->v_regs + off);
}

static inline void PM3_WAIT(struct pm3_par *par, u32 n)
{
	while (PM3_READ_REG(par, PM3InFIFOSpace) < n)
		cpu_relax();
}

static inline void PM3_WRITE_DAC_REG(struct pm3_par *par, unsigned r, u8 v)
{
	PM3_WAIT(par, 3);
	PM3_WRITE_REG(par, PM3RD_IndexHigh, (r >> 8) & 0xff);
	PM3_WRITE_REG(par, PM3RD_IndexLow, r & 0xff);
	wmb();
	PM3_WRITE_REG(par, PM3RD_IndexedData, v);
	wmb();
}

static inline void pm3fb_set_color(struct pm3_par *par, unsigned char regno,
			unsigned char r, unsigned char g, unsigned char b)
{
	PM3_WAIT(par, 4);
	PM3_WRITE_REG(par, PM3RD_PaletteWriteAddress, regno);
	wmb();
	PM3_WRITE_REG(par, PM3RD_PaletteData, r);
	wmb();
	PM3_WRITE_REG(par, PM3RD_PaletteData, g);
	wmb();
	PM3_WRITE_REG(par, PM3RD_PaletteData, b);
	wmb();
}

static void pm3fb_clear_colormap(struct pm3_par *par,
			unsigned char r, unsigned char g, unsigned char b)
{
	int i;

	for (i = 0; i < 256 ; i++)
		pm3fb_set_color(par, i, r, g, b);

}

/* Calculating various clock parameters */
static void pm3fb_calculate_clock(unsigned long reqclock,
				unsigned char *prescale,
				unsigned char *feedback,
				unsigned char *postscale)
{
	int f, pre, post;
	unsigned long freq;
	long freqerr = 1000;
	long currerr;

	for (f = 1; f < 256; f++) {
		for (pre = 1; pre < 256; pre++) {
			for (post = 0; post < 5; post++) {
				freq = ((2*PM3_REF_CLOCK * f) >> post) / pre;
				currerr = (reqclock > freq)
					? reqclock - freq
					: freq - reqclock;
				if (currerr < freqerr) {
					freqerr = currerr;
					*feedback = f;
					*prescale = pre;
					*postscale = post;
				}
			}
		}
	}
}

static inline int pm3fb_depth(const struct fb_var_screeninfo *var)
{
	if (var->bits_per_pixel == 16)
		return var->red.length + var->green.length
			+ var->blue.length;

	return var->bits_per_pixel;
}

static inline int pm3fb_shift_bpp(unsigned bpp, int v)
{
	switch (bpp) {
	case 8:
		return (v >> 4);
	case 16:
		return (v >> 3);
	case 32:
		return (v >> 2);
	}
	DPRINTK("Unsupported depth %u\n", bpp);
	return 0;
}

/* acceleration */
static int pm3fb_sync(struct fb_info *info)
{
	struct pm3_par *par = info->par;

	PM3_WAIT(par, 2);
	PM3_WRITE_REG(par, PM3FilterMode, PM3FilterModeSync);
	PM3_WRITE_REG(par, PM3Sync, 0);
	mb();
	do {
		while ((PM3_READ_REG(par, PM3OutFIFOWords)) == 0)
			cpu_relax();
	} while ((PM3_READ_REG(par, PM3OutputFifo)) != PM3Sync_Tag);

	return 0;
}

static void pm3fb_init_engine(struct fb_info *info)
{
	struct pm3_par *par = info->par;
	const u32 width = (info->var.xres_virtual + 7) & ~7;

	PM3_WAIT(par, 50);
	PM3_WRITE_REG(par, PM3FilterMode, PM3FilterModeSync);
	PM3_WRITE_REG(par, PM3StatisticMode, 0x0);
	PM3_WRITE_REG(par, PM3DeltaMode, 0x0);
	PM3_WRITE_REG(par, PM3RasterizerMode, 0x0);
	PM3_WRITE_REG(par, PM3ScissorMode, 0x0);
	PM3_WRITE_REG(par, PM3LineStippleMode, 0x0);
	PM3_WRITE_REG(par, PM3AreaStippleMode, 0x0);
	PM3_WRITE_REG(par, PM3GIDMode, 0x0);
	PM3_WRITE_REG(par, PM3DepthMode, 0x0);
	PM3_WRITE_REG(par, PM3StencilMode, 0x0);
	PM3_WRITE_REG(par, PM3StencilData, 0x0);
	PM3_WRITE_REG(par, PM3ColorDDAMode, 0x0);
	PM3_WRITE_REG(par, PM3TextureCoordMode, 0x0);
	PM3_WRITE_REG(par, PM3TextureIndexMode0, 0x0);
	PM3_WRITE_REG(par, PM3TextureIndexMode1, 0x0);
	PM3_WRITE_REG(par, PM3TextureReadMode, 0x0);
	PM3_WRITE_REG(par, PM3LUTMode, 0x0);
	PM3_WRITE_REG(par, PM3TextureFilterMode, 0x0);
	PM3_WRITE_REG(par, PM3TextureCompositeMode, 0x0);
	PM3_WRITE_REG(par, PM3TextureApplicationMode, 0x0);
	PM3_WRITE_REG(par, PM3TextureCompositeColorMode1, 0x0);
	PM3_WRITE_REG(par, PM3TextureCompositeAlphaMode1, 0x0);
	PM3_WRITE_REG(par, PM3TextureCompositeColorMode0, 0x0);
	PM3_WRITE_REG(par, PM3TextureCompositeAlphaMode0, 0x0);
	PM3_WRITE_REG(par, PM3FogMode, 0x0);
	PM3_WRITE_REG(par, PM3ChromaTestMode, 0x0);
	PM3_WRITE_REG(par, PM3AlphaTestMode, 0x0);
	PM3_WRITE_REG(par, PM3AntialiasMode, 0x0);
	PM3_WRITE_REG(par, PM3YUVMode, 0x0);
	PM3_WRITE_REG(par, PM3AlphaBlendColorMode, 0x0);
	PM3_WRITE_REG(par, PM3AlphaBlendAlphaMode, 0x0);
	PM3_WRITE_REG(par, PM3DitherMode, 0x0);
	PM3_WRITE_REG(par, PM3LogicalOpMode, 0x0);
	PM3_WRITE_REG(par, PM3RouterMode, 0x0);
	PM3_WRITE_REG(par, PM3Window, 0x0);

	PM3_WRITE_REG(par, PM3Config2D, 0x0);

	PM3_WRITE_REG(par, PM3SpanColorMask, 0xffffffff);

	PM3_WRITE_REG(par, PM3XBias, 0x0);
	PM3_WRITE_REG(par, PM3YBias, 0x0);
	PM3_WRITE_REG(par, PM3DeltaControl, 0x0);

	PM3_WRITE_REG(par, PM3BitMaskPattern, 0xffffffff);

	PM3_WRITE_REG(par, PM3FBDestReadEnables,
			   PM3FBDestReadEnables_E(0xff) |
			   PM3FBDestReadEnables_R(0xff) |
			   PM3FBDestReadEnables_ReferenceAlpha(0xff));
	PM3_WRITE_REG(par, PM3FBDestReadBufferAddr0, 0x0);
	PM3_WRITE_REG(par, PM3FBDestReadBufferOffset0, 0x0);
	PM3_WRITE_REG(par, PM3FBDestReadBufferWidth0,
			   PM3FBDestReadBufferWidth_Width(width));

	PM3_WRITE_REG(par, PM3FBDestReadMode,
			   PM3FBDestReadMode_ReadEnable |
			   PM3FBDestReadMode_Enable0);
	PM3_WRITE_REG(par, PM3FBSourceReadBufferAddr, 0x0);
	PM3_WRITE_REG(par, PM3FBSourceReadBufferOffset, 0x0);
	PM3_WRITE_REG(par, PM3FBSourceReadBufferWidth,
			   PM3FBSourceReadBufferWidth_Width(width));
	PM3_WRITE_REG(par, PM3FBSourceReadMode,
			   PM3FBSourceReadMode_Blocking |
			   PM3FBSourceReadMode_ReadEnable);

	PM3_WAIT(par, 2);
	{
		/* invert bits in bitmask */
		unsigned long rm = 1 | (3 << 7);
		switch (info->var.bits_per_pixel) {
		case 8:
			PM3_WRITE_REG(par, PM3PixelSize,
					   PM3PixelSize_GLOBAL_8BIT);
#ifdef __BIG_ENDIAN
			rm |= 3 << 15;
#endif
			break;
		case 16:
			PM3_WRITE_REG(par, PM3PixelSize,
					   PM3PixelSize_GLOBAL_16BIT);
#ifdef __BIG_ENDIAN
			rm |= 2 << 15;
#endif
			break;
		case 32:
			PM3_WRITE_REG(par, PM3PixelSize,
					   PM3PixelSize_GLOBAL_32BIT);
			break;
		default:
			DPRINTK(1, "Unsupported depth %d\n",
				info->var.bits_per_pixel);
			break;
		}
		PM3_WRITE_REG(par, PM3RasterizerMode, rm);
	}

	PM3_WAIT(par, 20);
	PM3_WRITE_REG(par, PM3FBSoftwareWriteMask, 0xffffffff);
	PM3_WRITE_REG(par, PM3FBHardwareWriteMask, 0xffffffff);
	PM3_WRITE_REG(par, PM3FBWriteMode,
			   PM3FBWriteMode_WriteEnable |
			   PM3FBWriteMode_OpaqueSpan |
			   PM3FBWriteMode_Enable0);
	PM3_WRITE_REG(par, PM3FBWriteBufferAddr0, 0x0);
	PM3_WRITE_REG(par, PM3FBWriteBufferOffset0, 0x0);
	PM3_WRITE_REG(par, PM3FBWriteBufferWidth0,
			   PM3FBWriteBufferWidth_Width(width));

	PM3_WRITE_REG(par, PM3SizeOfFramebuffer, 0x0);
	{
		/* size in lines of FB */
		unsigned long sofb = info->screen_size /
			info->fix.line_length;
		if (sofb > 4095)
			PM3_WRITE_REG(par, PM3SizeOfFramebuffer, 4095);
		else
			PM3_WRITE_REG(par, PM3SizeOfFramebuffer, sofb);

		switch (info->var.bits_per_pixel) {
		case 8:
			PM3_WRITE_REG(par, PM3DitherMode,
					   (1 << 10) | (2 << 3));
			break;
		case 16:
			PM3_WRITE_REG(par, PM3DitherMode,
					   (1 << 10) | (1 << 3));
			break;
		case 32:
			PM3_WRITE_REG(par, PM3DitherMode,
					   (1 << 10) | (0 << 3));
			break;
		default:
			DPRINTK(1, "Unsupported depth %d\n",
				info->current_par->depth);
			break;
		}
	}

	PM3_WRITE_REG(par, PM3dXDom, 0x0);
	PM3_WRITE_REG(par, PM3dXSub, 0x0);
	PM3_WRITE_REG(par, PM3dY, 1 << 16);
	PM3_WRITE_REG(par, PM3StartXDom, 0x0);
	PM3_WRITE_REG(par, PM3StartXSub, 0x0);
	PM3_WRITE_REG(par, PM3StartY, 0x0);
	PM3_WRITE_REG(par, PM3Count, 0x0);

/* Disable LocalBuffer. better safe than sorry */
	PM3_WRITE_REG(par, PM3LBDestReadMode, 0x0);
	PM3_WRITE_REG(par, PM3LBDestReadEnables, 0x0);
	PM3_WRITE_REG(par, PM3LBSourceReadMode, 0x0);
	PM3_WRITE_REG(par, PM3LBWriteMode, 0x0);

	pm3fb_sync(info);
}

static void pm3fb_fillrect(struct fb_info *info,
				const struct fb_fillrect *region)
{
	struct pm3_par *par = info->par;
	struct fb_fillrect modded;
	int vxres, vyres;
	int rop;
	u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
		((u32 *)info->pseudo_palette)[region->color] : region->color;

	if (info->state != FBINFO_STATE_RUNNING)
		return;
	if (info->flags & FBINFO_HWACCEL_DISABLED) {
		cfb_fillrect(info, region);
		return;
	}
	if (region->rop == ROP_COPY )
		rop = PM3Config2D_ForegroundROP(0x3); /* GXcopy */
	else
		rop = PM3Config2D_ForegroundROP(0x6) | /* GXxor */
			PM3Config2D_FBDestReadEnable;

	vxres = info->var.xres_virtual;
	vyres = info->var.yres_virtual;

	memcpy(&modded, region, sizeof(struct fb_fillrect));

	if (!modded.width || !modded.height ||
	    modded.dx >= vxres || modded.dy >= vyres)
		return;

	if (modded.dx + modded.width  > vxres)
		modded.width  = vxres - modded.dx;
	if (modded.dy + modded.height > vyres)
		modded.height = vyres - modded.dy;

	if (info->var.bits_per_pixel == 8)
		color |= color << 8;
	if (info->var.bits_per_pixel <= 16)
		color |= color << 16;

	PM3_WAIT(par, 4);
	/* ROP Ox3 is GXcopy */
	PM3_WRITE_REG(par, PM3Config2D,
			PM3Config2D_UseConstantSource |
			PM3Config2D_ForegroundROPEnable |
			rop |
			PM3Config2D_FBWriteEnable);

	PM3_WRITE_REG(par, PM3ForegroundColor, color);

	PM3_WRITE_REG(par, PM3RectanglePosition,
			PM3RectanglePosition_XOffset(modded.dx) |
			PM3RectanglePosition_YOffset(modded.dy));

	PM3_WRITE_REG(par, PM3Render2D,
		      PM3Render2D_XPositive |
		      PM3Render2D_YPositive |
		      PM3Render2D_Operation_Normal |
		      PM3Render2D_SpanOperation |
		      PM3Render2D_Width(modded.width) |
		      PM3Render2D_Height(modded.height));
}

static void pm3fb_copyarea(struct fb_info *info,
				const struct fb_copyarea *area)
{
	struct pm3_par *par = info->par;
	struct fb_copyarea modded;
	u32 vxres, vyres;
	int x_align, o_x, o_y;

	if (info->state != FBINFO_STATE_RUNNING)
		return;
	if (info->flags & FBINFO_HWACCEL_DISABLED) {
		cfb_copyarea(info, area);
		return;
	}

	memcpy(&modded, area, sizeof(struct fb_copyarea));

	vxres = info->var.xres_virtual;
	vyres = info->var.yres_virtual;

	if (!modded.width || !modded.height ||
	    modded.sx >= vxres || modded.sy >= vyres ||
	    modded.dx >= vxres || modded.dy >= vyres)
		return;

	if (modded.sx + modded.width > vxres)
		modded.width = vxres - modded.sx;
	if (modded.dx + modded.width > vxres)
		modded.width = vxres - modded.dx;
	if (modded.sy + modded.height > vyres)
		modded.height = vyres - modded.sy;
	if (modded.dy + modded.height > vyres)
		modded.height = vyres - modded.dy;

	o_x = modded.sx - modded.dx;	/*(sx > dx ) ? (sx - dx) : (dx - sx); */
	o_y = modded.sy - modded.dy;	/*(sy > dy ) ? (sy - dy) : (dy - sy); */

	x_align = (modded.sx & 0x1f);

	PM3_WAIT(par, 6);

	PM3_WRITE_REG(par, PM3Config2D,
			PM3Config2D_UserScissorEnable |
			PM3Config2D_ForegroundROPEnable |
			PM3Config2D_Blocking |
			PM3Config2D_ForegroundROP(0x3) | /* Ox3 is GXcopy */
			PM3Config2D_FBWriteEnable);

	PM3_WRITE_REG(par, PM3ScissorMinXY,
			((modded.dy & 0x0fff) << 16) | (modded.dx & 0x0fff));
	PM3_WRITE_REG(par, PM3ScissorMaxXY,
			(((modded.dy + modded.height) & 0x0fff) << 16) |
			((modded.dx + modded.width) & 0x0fff));

	PM3_WRITE_REG(par, PM3FBSourceReadBufferOffset,
			PM3FBSourceReadBufferOffset_XOffset(o_x) |
			PM3FBSourceReadBufferOffset_YOffset(o_y));

	PM3_WRITE_REG(par, PM3RectanglePosition,
			PM3RectanglePosition_XOffset(modded.dx - x_align) |
			PM3RectanglePosition_YOffset(modded.dy));

	PM3_WRITE_REG(par, PM3Render2D,
			((modded.sx > modded.dx) ? PM3Render2D_XPositive : 0) |
			((modded.sy > modded.dy) ? PM3Render2D_YPositive : 0) |
			PM3Render2D_Operation_Normal |
			PM3Render2D_SpanOperation |
			PM3Render2D_FBSourceReadEnable |
			PM3Render2D_Width(modded.width + x_align) |
			PM3Render2D_Height(modded.height));
}

static void pm3fb_imageblit(struct fb_info *info, const struct fb_image *image)
{
	struct pm3_par *par = info->par;
	u32 height = image->height;
	u32 fgx, bgx;
	const u32 *src = (const u32 *)image->data;

	if (info->state != FBINFO_STATE_RUNNING)
		return;
	if (info->flags & FBINFO_HWACCEL_DISABLED) {
		cfb_imageblit(info, image);
		return;
	}
	switch (info->fix.visual) {
	case FB_VISUAL_PSEUDOCOLOR:
		fgx = image->fg_color;
		bgx = image->bg_color;
		break;
	case FB_VISUAL_TRUECOLOR:
	default:
		fgx = par->palette[image->fg_color];
		bgx = par->palette[image->bg_color];
		break;
	}
	if (image->depth != 1)
		return cfb_imageblit(info, image);

	if (info->var.bits_per_pixel == 8) {
		fgx |= fgx << 8;
		bgx |= bgx << 8;
	}
	if (info->var.bits_per_pixel <= 16) {
		fgx |= fgx << 16;
		bgx |= bgx << 16;
	}

	PM3_WAIT(par, 7);

	PM3_WRITE_REG(par, PM3ForegroundColor, fgx);
	PM3_WRITE_REG(par, PM3BackgroundColor, bgx);

	/* ROP Ox3 is GXcopy */
	PM3_WRITE_REG(par, PM3Config2D,
			PM3Config2D_UserScissorEnable |
			PM3Config2D_UseConstantSource |
			PM3Config2D_ForegroundROPEnable |
			PM3Config2D_ForegroundROP(0x3) |
			PM3Config2D_OpaqueSpan |
			PM3Config2D_FBWriteEnable);
	PM3_WRITE_REG(par, PM3ScissorMinXY,
			((image->dy & 0x0fff) << 16) | (image->dx & 0x0fff));
	PM3_WRITE_REG(par, PM3ScissorMaxXY,
			(((image->dy + image->height) & 0x0fff) << 16) |
			((image->dx + image->width) & 0x0fff));
	PM3_WRITE_REG(par, PM3RectanglePosition,
			PM3RectanglePosition_XOffset(image->dx) |
			PM3RectanglePosition_YOffset(image->dy));
	PM3_WRITE_REG(par, PM3Render2D,
			PM3Render2D_XPositive |
			PM3Render2D_YPositive |
			PM3Render2D_Operation_SyncOnBitMask |
			PM3Render2D_SpanOperation |
			PM3Render2D_Width(image->width) |
			PM3Render2D_Height(image->height));


	while (height--) {
		int width = ((image->width + 7) >> 3)
				+ info->pixmap.scan_align - 1;
		width >>= 2;

		while (width >= PM3_FIFO_SIZE) {
			int i = PM3_FIFO_SIZE - 1;

			PM3_WAIT(par, PM3_FIFO_SIZE);
			while (i--) {
				PM3_WRITE_REG(par, PM3BitMaskPattern, *src);
				src++;
			}
			width -= PM3_FIFO_SIZE - 1;
		}

		PM3_WAIT(par, width + 1);
		while (width--) {
			PM3_WRITE_REG(par, PM3BitMaskPattern, *src);
			src++;
		}
	}
}
/* end of acceleration functions */

/*
 *	Hardware Cursor support.
 */
static const u8 cursor_bits_lookup[16] = {
	0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
	0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
};

static int pm3fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
	struct pm3_par *par = info->par;
	u8 mode;

	if (!hwcursor)
		return -EINVAL;	/* just to force soft_cursor() call */

	/* Too large of a cursor or wrong bpp :-( */
	if (cursor->image.width > 64 ||
	    cursor->image.height > 64 ||
	    cursor->image.depth > 1)
		return -EINVAL;

	mode = PM3RD_CursorMode_TYPE_X;
	if (cursor->enable)
		 mode |= PM3RD_CursorMode_CURSOR_ENABLE;

	PM3_WRITE_DAC_REG(par, PM3RD_CursorMode, mode);

	/*
	 * If the cursor is not be changed this means either we want the
	 * current cursor state (if enable is set) or we want to query what
	 * we can do with the cursor (if enable is not set)
	 */
	if (!cursor->set)
		return 0;

	if (cursor->set & FB_CUR_SETPOS) {
		int x = cursor->image.dx - info->var.xoffset;
		int y = cursor->image.dy - info->var.yoffset;

		PM3_WRITE_DAC_REG(par, PM3RD_CursorXLow, x & 0xff);
		PM3_WRITE_DAC_REG(par, PM3RD_CursorXHigh, (x >> 8) & 0xf);
		PM3_WRITE_DAC_REG(par, PM3RD_CursorYLow, y & 0xff);
		PM3_WRITE_DAC_REG(par, PM3RD_CursorYHigh, (y >> 8) & 0xf);
	}

	if (cursor->set & FB_CUR_SETHOT) {
		PM3_WRITE_DAC_REG(par, PM3RD_CursorHotSpotX,
				  cursor->hot.x & 0x3f);
		PM3_WRITE_DAC_REG(par, PM3RD_CursorHotSpotY,
				  cursor->hot.y & 0x3f);
	}

	if (cursor->set & FB_CUR_SETCMAP) {
		u32 fg_idx = cursor->image.fg_color;
		u32 bg_idx = cursor->image.bg_color;
		struct fb_cmap cmap = info->cmap;

		/* the X11 driver says one should use these color registers */
		PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(39),
				  cmap.red[fg_idx] >> 8 );
		PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(40),
				  cmap.green[fg_idx] >> 8 );
		PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(41),
				  cmap.blue[fg_idx] >> 8 );

		PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(42),
				  cmap.red[bg_idx] >> 8 );
		PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(43),
				  cmap.green[bg_idx] >> 8 );
		PM3_WRITE_DAC_REG(par, PM3RD_CursorPalette(44),
				  cmap.blue[bg_idx] >> 8 );
	}

	if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
		u8 *bitmap = (u8 *)cursor->image.data;
		u8 *mask = (u8 *)cursor->mask;
		int i;
		int pos = PM3RD_CursorPattern(0);

		for (i = 0; i < cursor->image.height; i++) {
			int j = (cursor->image.width + 7) >> 3;
			int k = 8 - j;

			for (; j > 0; j--) {
				u8 data = *bitmap ^ *mask;

				if (cursor->rop == ROP_COPY)
					data = *mask & *bitmap;
				/* Upper 4 bits of bitmap data */
				PM3_WRITE_DAC_REG(par, pos++,
					cursor_bits_lookup[data >> 4] |
					(cursor_bits_lookup[*mask >> 4] << 1));
				/* Lower 4 bits of bitmap */
				PM3_WRITE_DAC_REG(par, pos++,
					cursor_bits_lookup[data & 0xf] |
					(cursor_bits_lookup[*mask & 0xf] << 1));
				bitmap++;
				mask++;
			}
			for (; k > 0; k--) {
				PM3_WRITE_DAC_REG(par, pos++, 0);
				PM3_WRITE_DAC_REG(par, pos++, 0);
			}
		}
		while (pos < PM3RD_CursorPattern(1024))
			PM3_WRITE_DAC_REG(par, pos++, 0);
	}
	return 0;
}

/* write the mode to registers */
static void pm3fb_write_mode(struct fb_info *info)
{
	struct pm3_par *par = info->par;
	char tempsync = 0x00;
	char tempmisc = 0x00;
	const u32 hsstart = info->var.right_margin;
	const u32 hsend = hsstart + info->var.hsync_len;
	const u32 hbend = hsend + info->var.left_margin;
	const u32 xres = (info->var.xres + 31) & ~31;
	const u32 htotal = xres + hbend;
	const u32 vsstart = info->var.lower_margin;
	const u32 vsend = vsstart + info->var.vsync_len;
	const u32 vbend = vsend + info->var.upper_margin;
	const u32 vtotal = info->var.yres + vbend;
	const u32 width = (info->var.xres_virtual + 7) & ~7;
	const unsigned bpp = info->var.bits_per_pixel;

	PM3_WAIT(par, 20);
	PM3_WRITE_REG(par, PM3MemBypassWriteMask, 0xffffffff);
	PM3_WRITE_REG(par, PM3Aperture0, 0x00000000);
	PM3_WRITE_REG(par, PM3Aperture1, 0x00000000);
	PM3_WRITE_REG(par, PM3FIFODis, 0x00000007);

	PM3_WRITE_REG(par, PM3HTotal,
			   pm3fb_shift_bpp(bpp, htotal - 1));
	PM3_WRITE_REG(par, PM3HsEnd,
			   pm3fb_shift_bpp(bpp, hsend));
	PM3_WRITE_REG(par, PM3HsStart,
			   pm3fb_shift_bpp(bpp, hsstart));
	PM3_WRITE_REG(par, PM3HbEnd,
			   pm3fb_shift_bpp(bpp, hbend));
	PM3_WRITE_REG(par, PM3HgEnd,
			   pm3fb_shift_bpp(bpp, hbend));
	PM3_WRITE_REG(par, PM3ScreenStride,
			   pm3fb_shift_bpp(bpp, width));
	PM3_WRITE_REG(par, PM3VTotal, vtotal - 1);
	PM3_WRITE_REG(par, PM3VsEnd, vsend - 1);
	PM3_WRITE_REG(par, PM3VsStart, vsstart - 1);
	PM3_WRITE_REG(par, PM3VbEnd, vbend);

	switch (bpp) {
	case 8:
		PM3_WRITE_REG(par, PM3ByAperture1Mode,
				   PM3ByApertureMode_PIXELSIZE_8BIT);
		PM3_WRITE_REG(par, PM3ByAperture2Mode,
				   PM3ByApertureMode_PIXELSIZE_8BIT);
		break;

	case 16:
#ifndef __BIG_ENDIAN
		PM3_WRITE_REG(par, PM3ByAperture1Mode,
				   PM3ByApertureMode_PIXELSIZE_16BIT);
		PM3_WRITE_REG(par, PM3ByAperture2Mode,
				   PM3ByApertureMode_PIXELSIZE_16BIT);
#else
		PM3_WRITE_REG(par, PM3ByAperture1Mode,
				   PM3ByApertureMode_PIXELSIZE_16BIT |
				   PM3ByApertureMode_BYTESWAP_BADC);
		PM3_WRITE_REG(par, PM3ByAperture2Mode,
				   PM3ByApertureMode_PIXELSIZE_16BIT |
				   PM3ByApertureMode_BYTESWAP_BADC);
#endif /* ! __BIG_ENDIAN */
		break;

	case 32:
#ifndef __BIG_ENDIAN
		PM3_WRITE_REG(par, PM3ByAperture1Mode,
				   PM3ByApertureMode_PIXELSIZE_32BIT);
		PM3_WRITE_REG(par, PM3ByAperture2Mode,
				   PM3ByApertureMode_PIXELSIZE_32BIT);
#else
		PM3_WRITE_REG(par, PM3ByAperture1Mode,
				   PM3ByApertureMode_PIXELSIZE_32BIT |
				   PM3ByApertureMode_BYTESWAP_DCBA);
		PM3_WRITE_REG(par, PM3ByAperture2Mode,
				   PM3ByApertureMode_PIXELSIZE_32BIT |
				   PM3ByApertureMode_BYTESWAP_DCBA);
#endif /* ! __BIG_ENDIAN */
		break;

	default:
		DPRINTK("Unsupported depth %d\n", bpp);
		break;
	}

	/*
	 * Oxygen VX1 - it appears that setting PM3VideoControl and
	 * then PM3RD_SyncControl to the same SYNC settings undoes
	 * any net change - they seem to xor together.  Only set the
	 * sync options in PM3RD_SyncControl.  --rmk
	 */
	{
		unsigned int video = par->video;

		video &= ~(PM3VideoControl_HSYNC_MASK |
			   PM3VideoControl_VSYNC_MASK);
		video |= PM3VideoControl_HSYNC_ACTIVE_HIGH |
			 PM3VideoControl_VSYNC_ACTIVE_HIGH;
		PM3_WRITE_REG(par, PM3VideoControl, video);
	}
	PM3_WRITE_REG(par, PM3VClkCtl,
			   (PM3_READ_REG(par, PM3VClkCtl) & 0xFFFFFFFC));
	PM3_WRITE_REG(par, PM3ScreenBase, par->base);
	PM3_WRITE_REG(par, PM3ChipConfig,
			   (PM3_READ_REG(par, PM3ChipConfig) & 0xFFFFFFFD));

	wmb();
	{
		unsigned char uninitialized_var(m);	/* ClkPreScale */
		unsigned char uninitialized_var(n);	/* ClkFeedBackScale */
		unsigned char uninitialized_var(p);	/* ClkPostScale */
		unsigned long pixclock = PICOS2KHZ(info->var.pixclock);

		(void)pm3fb_calculate_clock(pixclock, &m, &n, &p);

		DPRINTK("Pixclock: %ld, Pre: %d, Feedback: %d, Post: %d\n",
			pixclock, (int) m, (int) n, (int) p);

		PM3_WRITE_DAC_REG(par, PM3RD_DClk0PreScale, m);
		PM3_WRITE_DAC_REG(par, PM3RD_DClk0FeedbackScale, n);
		PM3_WRITE_DAC_REG(par, PM3RD_DClk0PostScale, p);
	}
	/*
	   PM3_WRITE_DAC_REG(par, PM3RD_IndexControl, 0x00);
	 */
	/*
	   PM3_SLOW_WRITE_REG(par, PM3RD_IndexControl, 0x00);
	 */
	if ((par->video & PM3VideoControl_HSYNC_MASK) ==
	    PM3VideoControl_HSYNC_ACTIVE_HIGH)
		tempsync |= PM3RD_SyncControl_HSYNC_ACTIVE_HIGH;
	if ((par->video & PM3VideoControl_VSYNC_MASK) ==
	    PM3VideoControl_VSYNC_ACTIVE_HIGH)
		tempsync |= PM3RD_SyncControl_VSYNC_ACTIVE_HIGH;

	PM3_WRITE_DAC_REG(par, PM3RD_SyncControl, tempsync);
	DPRINTK("PM3RD_SyncControl: %d\n", tempsync);

	PM3_WRITE_DAC_REG(par, PM3RD_DACControl, 0x00);

	switch (pm3fb_depth(&info->var)) {
	case 8:
		PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
				  PM3RD_PixelSize_8_BIT_PIXELS);
		PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
				  PM3RD_ColorFormat_CI8_COLOR |
				  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW);
		tempmisc |= PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
		break;
	case 12:
		PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
				  PM3RD_PixelSize_16_BIT_PIXELS);
		PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
				  PM3RD_ColorFormat_4444_COLOR |
				  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW |
				  PM3RD_ColorFormat_LINEAR_COLOR_EXT_ENABLE);
		tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
			PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
		break;
	case 15:
		PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
				  PM3RD_PixelSize_16_BIT_PIXELS);
		PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
				  PM3RD_ColorFormat_5551_FRONT_COLOR |
				  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW |
				  PM3RD_ColorFormat_LINEAR_COLOR_EXT_ENABLE);
		tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
			PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
		break;
	case 16:
		PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
				  PM3RD_PixelSize_16_BIT_PIXELS);
		PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
				  PM3RD_ColorFormat_565_FRONT_COLOR |
				  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW |
				  PM3RD_ColorFormat_LINEAR_COLOR_EXT_ENABLE);
		tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
			PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
		break;
	case 32:
		PM3_WRITE_DAC_REG(par, PM3RD_PixelSize,
				  PM3RD_PixelSize_32_BIT_PIXELS);
		PM3_WRITE_DAC_REG(par, PM3RD_ColorFormat,
				  PM3RD_ColorFormat_8888_COLOR |
				  PM3RD_ColorFormat_COLOR_ORDER_BLUE_LOW);
		tempmisc |= PM3RD_MiscControl_DIRECTCOLOR_ENABLE |
			PM3RD_MiscControl_HIGHCOLOR_RES_ENABLE;
		break;
	}
	PM3_WRITE_DAC_REG(par, PM3RD_MiscControl, tempmisc);
}

/*
 * hardware independent functions
 */
static int pm3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
	u32 lpitch;
	unsigned bpp = var->red.length + var->green.length
			+ var->blue.length + var->transp.length;

	if (bpp != var->bits_per_pixel) {
		/* set predefined mode for bits_per_pixel settings */

		switch (var->bits_per_pixel) {
		case 8:
			var->red.length = 8;
			var->green.length = 8;
			var->blue.length = 8;
			var->red.offset = 0;
			var->green.offset = 0;
			var->blue.offset = 0;
			var->transp.offset = 0;
			var->transp.length = 0;
			break;
		case 16:
			var->red.length = 5;
			var->blue.length = 5;
			var->green.length = 6;
			var->transp.length = 0;
			break;
		case 32:
			var->red.length = 8;
			var->green.length = 8;
			var->blue.length = 8;
			var->transp.length = 8;
			break;
		default:
			DPRINTK("depth not supported: %u\n",
				var->bits_per_pixel);
			return -EINVAL;
		}
	}
	/* it is assumed BGRA order */
	if (var->bits_per_pixel > 8 ) {
		var->blue.offset = 0;
		var->green.offset = var->blue.length;
		var->red.offset = var->green.offset + var->green.length;
		var->transp.offset = var->red.offset + var->red.length;
	}
	var->height = -1;
	var->width = -1;

	if (var->xres != var->xres_virtual) {
		DPRINTK("virtual x resolution != "
			"physical x resolution not supported\n");
		return -EINVAL;
	}

	if (var->yres > var->yres_virtual) {
		DPRINTK("virtual y resolution < "
			"physical y resolution not possible\n");
		return -EINVAL;
	}

	if (var->xoffset) {
		DPRINTK("xoffset not supported\n");
		return -EINVAL;
	}

	if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
		DPRINTK("interlace not supported\n");
		return -EINVAL;
	}

	var->xres = (var->xres + 31) & ~31; /* could sometimes be 8 */
	lpitch = var->xres * ((var->bits_per_pixel + 7) >> 3);

	if (var->xres < 200 || var->xres > 2048) {
		DPRINTK("width not supported: %u\n", var->xres);
		return -EINVAL;
	}

	if (var->yres < 200 || var->yres > 4095) {
		DPRINTK("height not supported: %u\n", var->yres);
		return -EINVAL;
	}

	if (lpitch * var->yres_virtual > info->fix.smem_len) {
		DPRINTK("no memory for screen (%ux%ux%u)\n",
			var->xres, var->yres_virtual, var->bits_per_pixel);
		return -EINVAL;
	}

	if (PICOS2KHZ(var->pixclock) > PM3_MAX_PIXCLOCK) {
		DPRINTK("pixclock too high (%ldKHz)\n",
			PICOS2KHZ(var->pixclock));
		return -EINVAL;
	}

	var->accel_flags = 0;	/* Can't mmap if this is on */

	DPRINTK("Checking graphics mode at %dx%d depth %d\n",
		var->xres, var->yres, var->bits_per_pixel);
	return 0;
}

static int pm3fb_set_par(struct fb_info *info)
{
	struct pm3_par *par = info->par;
	const u32 xres = (info->var.xres + 31) & ~31;
	const unsigned bpp = info->var.bits_per_pixel;

	par->base = pm3fb_shift_bpp(bpp, (info->var.yoffset * xres)
					+ info->var.xoffset);
	par->video = 0;

	if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
		par->video |= PM3VideoControl_HSYNC_ACTIVE_HIGH;
	else
		par->video |= PM3VideoControl_HSYNC_ACTIVE_LOW;

	if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
		par->video |= PM3VideoControl_VSYNC_ACTIVE_HIGH;
	else
		par->video |= PM3VideoControl_VSYNC_ACTIVE_LOW;

	if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE)
		par->video |= PM3VideoControl_LINE_DOUBLE_ON;

	if ((info->var.activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW)
		par->video |= PM3VideoControl_ENABLE;
	else
		DPRINTK("PM3Video disabled\n");

	switch (bpp) {
	case 8:
		par->video |= PM3VideoControl_PIXELSIZE_8BIT;
		break;
	case 16:
		par->video |= PM3VideoControl_PIXELSIZE_16BIT;
		break;
	case 32:
		par->video |= PM3VideoControl_PIXELSIZE_32BIT;
		break;
	default:
		DPRINTK("Unsupported depth\n");
		break;
	}

	info->fix.visual =
		(bpp == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
	info->fix.line_length = ((info->var.xres_virtual + 7)  >> 3) * bpp;

/*	pm3fb_clear_memory(info, 0);*/
	pm3fb_clear_colormap(par, 0, 0, 0);
	PM3_WRITE_DAC_REG(par, PM3RD_CursorMode, 0);
	pm3fb_init_engine(info);
	pm3fb_write_mode(info);
	return 0;
}

static int pm3fb_setcolreg(unsigned regno, unsigned red, unsigned green,
			   unsigned blue, unsigned transp,
			   struct fb_info *info)
{
	struct pm3_par *par = info->par;

	if (regno >= 256)  /* no. of hw registers */
	   return -EINVAL;

	/* grayscale works only partially under directcolor */
	/* grayscale = 0.30*R + 0.59*G + 0.11*B */
	if (info->var.grayscale)
	   red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;

	/* Directcolor:
	 *   var->{color}.offset contains start of bitfield
	 *   var->{color}.length contains length of bitfield
	 *   {hardwarespecific} contains width of DAC
	 *   pseudo_palette[X] is programmed to (X << red.offset) |
	 *					(X << green.offset) |
	 *					(X << blue.offset)
	 *   RAMDAC[X] is programmed to (red, green, blue)
	 *   color depth = SUM(var->{color}.length)
	 *
	 * Pseudocolor:
	 *	var->{color}.offset is 0
	 *	var->{color}.length contains width of DAC or the number
	 *			of unique colors available (color depth)
	 *	pseudo_palette is not used
	 *	RAMDAC[X] is programmed to (red, green, blue)
	 *	color depth = var->{color}.length
	 */

	/*
	 * This is the point where the color is converted to something that
	 * is acceptable by the hardware.
	 */
#define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF - (val)) >> 16)
	red = CNVT_TOHW(red, info->var.red.length);
	green = CNVT_TOHW(green, info->var.green.length);
	blue = CNVT_TOHW(blue, info->var.blue.length);
	transp = CNVT_TOHW(transp, info->var.transp.length);
#undef CNVT_TOHW

	if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
	info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
		u32 v;

		if (regno >= 16)
			return -EINVAL;

		v = (red << info->var.red.offset) |
			(green << info->var.green.offset) |
			(blue << info->var.blue.offset) |
			(transp << info->var.transp.offset);

		switch (info->var.bits_per_pixel) {
		case 8:
			break;
		case 16:
		case 32:
			((u32 *)(info->pseudo_palette))[regno] = v;
			break;
		}
		return 0;
	} else if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR)
		pm3fb_set_color(par, regno, red, green, blue);

	return 0;
}

static int pm3fb_pan_display(struct fb_var_screeninfo *var,
				 struct fb_info *info)
{
	struct pm3_par *par = info->par;
	const u32 xres = (var->xres + 31) & ~31;

	par->base = pm3fb_shift_bpp(var->bits_per_pixel,
					(var->yoffset * xres)
					+ var->xoffset);
	PM3_WAIT(par, 1);
	PM3_WRITE_REG(par, PM3ScreenBase, par->base);
	return 0;
}

static int pm3fb_blank(int blank_mode, struct fb_info *info)
{
	struct pm3_par *par = info->par;
	u32 video = par->video;

	/*
	 * Oxygen VX1 - it appears that setting PM3VideoControl and
	 * then PM3RD_SyncControl to the same SYNC settings undoes
	 * any net change - they seem to xor together.  Only set the
	 * sync options in PM3RD_SyncControl.  --rmk
	 */
	video &= ~(PM3VideoControl_HSYNC_MASK |
		   PM3VideoControl_VSYNC_MASK);
	video |= PM3VideoControl_HSYNC_ACTIVE_HIGH |
		 PM3VideoControl_VSYNC_ACTIVE_HIGH;

	switch (blank_mode) {
	case FB_BLANK_UNBLANK:
		video |= PM3VideoControl_ENABLE;
		break;
	case FB_BLANK_NORMAL:
		video &= ~PM3VideoControl_ENABLE;
		break;
	case FB_BLANK_HSYNC_SUSPEND:
		video &= ~(PM3VideoControl_HSYNC_MASK |
			  PM3VideoControl_BLANK_ACTIVE_LOW);
		break;
	case FB_BLANK_VSYNC_SUSPEND:
		video &= ~(PM3VideoControl_VSYNC_MASK |
			  PM3VideoControl_BLANK_ACTIVE_LOW);
		break;
	case FB_BLANK_POWERDOWN:
		video &= ~(PM3VideoControl_HSYNC_MASK |
			  PM3VideoControl_VSYNC_MASK |
			  PM3VideoControl_BLANK_ACTIVE_LOW);
		break;
	default:
		DPRINTK("Unsupported blanking %d\n", blank_mode);
		return 1;
	}

	PM3_WAIT(par, 1);
	PM3_WRITE_REG(par, PM3VideoControl, video);
	return 0;
}

	/*
	 *  Frame buffer operations
	 */

static struct fb_ops pm3fb_ops = {
	.owner		= THIS_MODULE,
	.fb_check_var	= pm3fb_check_var,
	.fb_set_par	= pm3fb_set_par,
	.fb_setcolreg	= pm3fb_setcolreg,
	.fb_pan_display	= pm3fb_pan_display,
	.fb_fillrect	= pm3fb_fillrect,
	.fb_copyarea	= pm3fb_copyarea,
	.fb_imageblit	= pm3fb_imageblit,
	.fb_blank	= pm3fb_blank,
	.fb_sync	= pm3fb_sync,
	.fb_cursor	= pm3fb_cursor,
};

/* ------------------------------------------------------------------------- */

	/*
	 *  Initialization
	 */

/* mmio register are already mapped when this function is called */
/* the pm3fb_fix.smem_start is also set */
static unsigned long __devinit pm3fb_size_memory(struct pm3_par *par)
{
	unsigned long	memsize = 0;
	unsigned long	tempBypass, i, temp1, temp2;
	unsigned char	__iomem *screen_mem;

	pm3fb_fix.smem_len = 64 * 1024l * 1024; /* request full aperture size */
	/* Linear frame buffer - request region and map it. */
	if (!request_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len,
				 "pm3fb smem")) {
		printk(KERN_WARNING "pm3fb: Can't reserve smem.\n");
		return 0;
	}
	screen_mem =
		ioremap_nocache(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
	if (!screen_mem) {
		printk(KERN_WARNING "pm3fb: Can't ioremap smem area.\n");
		release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
		return 0;
	}

	/* TODO: card-specific stuff, *before* accessing *any* FB memory */
	/* For Appian Jeronimo 2000 board second head */

	tempBypass = PM3_READ_REG(par, PM3MemBypassWriteMask);

	DPRINTK("PM3MemBypassWriteMask was: 0x%08lx\n", tempBypass);

	PM3_WAIT(par, 1);
	PM3_WRITE_REG(par, PM3MemBypassWriteMask, 0xFFFFFFFF);

	/* pm3 split up memory, replicates, and do a lot of
	 * nasty stuff IMHO ;-)
	 */
	for (i = 0; i < 32; i++) {
		fb_writel(i * 0x00345678,
			  (screen_mem + (i * 1048576)));
		mb();
		temp1 = fb_readl((screen_mem + (i * 1048576)));

		/* Let's check for wrapover, write will fail at 16MB boundary */
		if (temp1 == (i * 0x00345678))
			memsize = i;
		else
			break;
	}

	DPRINTK("First detect pass already got %ld MB\n", memsize + 1);

	if (memsize + 1 == i) {
		for (i = 0; i < 32; i++) {
			/* Clear first 32MB ; 0 is 0, no need to byteswap */
			writel(0x0000000, (screen_mem + (i * 1048576)));
		}
		wmb();

		for (i = 32; i < 64; i++) {
			fb_writel(i * 0x00345678,
				  (screen_mem + (i * 1048576)));
			mb();
			temp1 =
			    fb_readl((screen_mem + (i * 1048576)));
			temp2 =
			    fb_readl((screen_mem + ((i - 32) * 1048576)));
			/* different value, different RAM... */
			if ((temp1 == (i * 0x00345678)) && (temp2 == 0))
				memsize = i;
			else
				break;
		}
	}
	DPRINTK("Second detect pass got %ld MB\n", memsize + 1);

	PM3_WAIT(par, 1);
	PM3_WRITE_REG(par, PM3MemBypassWriteMask, tempBypass);

	iounmap(screen_mem);
	release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
	memsize = 1048576 * (memsize + 1);

	DPRINTK("Returning 0x%08lx bytes\n", memsize);

	return memsize;
}

static int __devinit pm3fb_probe(struct pci_dev *dev,
				  const struct pci_device_id *ent)
{
	struct fb_info *info;
	struct pm3_par *par;
	struct device *device = &dev->dev; /* for pci drivers */
	int err;
	int retval = -ENXIO;

	err = pci_enable_device(dev);
	if (err) {
		printk(KERN_WARNING "pm3fb: Can't enable PCI dev: %d\n", err);
		return err;
	}
	/*
	 * Dynamically allocate info and par
	 */
	info = framebuffer_alloc(sizeof(struct pm3_par), device);

	if (!info)
		return -ENOMEM;
	par = info->par;

	/*
	 * Here we set the screen_base to the virtual memory address
	 * for the framebuffer.
	 */
	pm3fb_fix.mmio_start = pci_resource_start(dev, 0);
	pm3fb_fix.mmio_len = PM3_REGS_SIZE;
#if defined(__BIG_ENDIAN)
	pm3fb_fix.mmio_start += PM3_REGS_SIZE;
	DPRINTK("Adjusting register base for big-endian.\n");
#endif

	/* Registers - request region and map it. */
	if (!request_mem_region(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len,
				 "pm3fb regbase")) {
		printk(KERN_WARNING "pm3fb: Can't reserve regbase.\n");
		goto err_exit_neither;
	}
	par->v_regs =
		ioremap_nocache(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len);
	if (!par->v_regs) {
		printk(KERN_WARNING "pm3fb: Can't remap %s register area.\n",
			pm3fb_fix.id);
		release_mem_region(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len);
		goto err_exit_neither;
	}

	/* Linear frame buffer - request region and map it. */
	pm3fb_fix.smem_start = pci_resource_start(dev, 1);
	pm3fb_fix.smem_len = pm3fb_size_memory(par);
	if (!pm3fb_fix.smem_len) {
		printk(KERN_WARNING "pm3fb: Can't find memory on board.\n");
		goto err_exit_mmio;
	}
	if (!request_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len,
				 "pm3fb smem")) {
		printk(KERN_WARNING "pm3fb: Can't reserve smem.\n");
		goto err_exit_mmio;
	}
	info->screen_base =
		ioremap_nocache(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
	if (!info->screen_base) {
		printk(KERN_WARNING "pm3fb: Can't ioremap smem area.\n");
		release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
		goto err_exit_mmio;
	}
	info->screen_size = pm3fb_fix.smem_len;

#ifdef CONFIG_MTRR
	if (!nomtrr)
		par->mtrr_handle = mtrr_add(pm3fb_fix.smem_start,
						pm3fb_fix.smem_len,
						MTRR_TYPE_WRCOMB, 1);
#endif
	info->fbops = &pm3fb_ops;

	par->video = PM3_READ_REG(par, PM3VideoControl);

	info->fix = pm3fb_fix;
	info->pseudo_palette = par->palette;
	info->flags = FBINFO_DEFAULT |
			FBINFO_HWACCEL_XPAN |
			FBINFO_HWACCEL_YPAN |
			FBINFO_HWACCEL_COPYAREA |
			FBINFO_HWACCEL_IMAGEBLIT |
			FBINFO_HWACCEL_FILLRECT;

	if (noaccel) {
		printk(KERN_DEBUG "disabling acceleration\n");
		info->flags |= FBINFO_HWACCEL_DISABLED;
	}
	info->pixmap.addr = kmalloc(PM3_PIXMAP_SIZE, GFP_KERNEL);
	if (!info->pixmap.addr) {
		retval = -ENOMEM;
		goto err_exit_pixmap;
	}
	info->pixmap.size = PM3_PIXMAP_SIZE;
	info->pixmap.buf_align = 4;
	info->pixmap.scan_align = 4;
	info->pixmap.access_align = 32;
	info->pixmap.flags = FB_PIXMAP_SYSTEM;

	/*
	 * This should give a reasonable default video mode. The following is
	 * done when we can set a video mode.
	 */
	if (!mode_option)
		mode_option = "640x480@60";

	retval = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8);

	if (!retval || retval == 4) {
		retval = -EINVAL;
		goto err_exit_both;
	}

	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
		retval = -ENOMEM;
		goto err_exit_both;
	}

	/*
	 * For drivers that can...
	 */
	pm3fb_check_var(&info->var, info);

	if (register_framebuffer(info) < 0) {
		retval = -EINVAL;
		goto err_exit_all;
	}
	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
	   info->fix.id);
	pci_set_drvdata(dev, info);
	return 0;

 err_exit_all:
	fb_dealloc_cmap(&info->cmap);
 err_exit_both:
	kfree(info->pixmap.addr);
 err_exit_pixmap:
	iounmap(info->screen_base);
	release_mem_region(pm3fb_fix.smem_start, pm3fb_fix.smem_len);
 err_exit_mmio:
	iounmap(par->v_regs);
	release_mem_region(pm3fb_fix.mmio_start, pm3fb_fix.mmio_len);
 err_exit_neither:
	framebuffer_release(info);
	return retval;
}

	/*
	 *  Cleanup
	 */
static void __devexit pm3fb_remove(struct pci_dev *dev)
{
	struct fb_info *info = pci_get_drvdata(dev);

	if (info) {
		struct fb_fix_screeninfo *fix = &info->fix;
		struct pm3_par *par = info->par;

		unregister_framebuffer(info);
		fb_dealloc_cmap(&info->cmap);

#ifdef CONFIG_MTRR
	if (par->mtrr_handle >= 0)
		mtrr_del(par->mtrr_handle, info->fix.smem_start,
			 info->fix.smem_len);
#endif /* CONFIG_MTRR */
		iounmap(info->screen_base);
		release_mem_region(fix->smem_start, fix->smem_len);
		iounmap(par->v_regs);
		release_mem_region(fix->mmio_start, fix->mmio_len);

		pci_set_drvdata(dev, NULL);
		kfree(info->pixmap.addr);
		framebuffer_release(info);
	}
}

static struct pci_device_id pm3fb_id_table[] = {
	{ PCI_VENDOR_ID_3DLABS, 0x0a,
	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ 0, }
};

/* For PCI drivers */
static struct pci_driver pm3fb_driver = {
	.name =		"pm3fb",
	.id_table =	pm3fb_id_table,
	.probe =	pm3fb_probe,
	.remove =	__devexit_p(pm3fb_remove),
};

MODULE_DEVICE_TABLE(pci, pm3fb_id_table);

#ifndef MODULE
	/*
	 *  Setup
	 */

/*
 * Only necessary if your driver takes special options,
 * otherwise we fall back on the generic fb_setup().
 */
static int __init pm3fb_setup(char *options)
{
	char *this_opt;

	/* Parse user speficied options (`video=pm3fb:') */
	if (!options || !*options)
		return 0;

	while ((this_opt = strsep(&options, ",")) != NULL) {
		if (!*this_opt)
			continue;
		else if (!strncmp(this_opt, "noaccel", 7))
			noaccel = 1;
		else if (!strncmp(this_opt, "hwcursor=", 9))
			hwcursor = simple_strtoul(this_opt + 9, NULL, 0);
#ifdef CONFIG_MTRR
		else if (!strncmp(this_opt, "nomtrr", 6))
			nomtrr = 1;
#endif
		else
			mode_option = this_opt;
	}
	return 0;
}
#endif /* MODULE */

static int __init pm3fb_init(void)
{
	/*
	 *  For kernel boot options (in 'video=pm3fb:<options>' format)
	 */
#ifndef MODULE
	char *option = NULL;

	if (fb_get_options("pm3fb", &option))
		return -ENODEV;
	pm3fb_setup(option);
#endif

	return pci_register_driver(&pm3fb_driver);
}

#ifdef MODULE
static void __exit pm3fb_exit(void)
{
	pci_unregister_driver(&pm3fb_driver);
}

module_exit(pm3fb_exit);
#endif
module_init(pm3fb_init);

module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
module_param(noaccel, bool, 0);
MODULE_PARM_DESC(noaccel, "Disable acceleration");
module_param(hwcursor, int, 0644);
MODULE_PARM_DESC(hwcursor, "Enable hardware cursor "
			"(1=enable, 0=disable, default=1)");
#ifdef CONFIG_MTRR
module_param(nomtrr, bool, 0);
MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");
#endif

MODULE_DESCRIPTION("Permedia3 framebuffer device driver");
MODULE_LICENSE("GPL");