aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/video/ffb.c
blob: 3f6c98fad437fca8f542dbd11a29a19e55d52bce (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
/* ffb.c: Creator/Elite3D frame buffer driver
 *
 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
 * Copyright (C) 1997,1998,1999 Jakub Jelinek (jj@ultra.linux.cz)
 *
 * Driver layout based loosely on tgafb.c, see that file for credits.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/fb.h>
#include <linux/mm.h>
#include <linux/timer.h>

#include <asm/io.h>
#include <asm/upa.h>
#include <asm/prom.h>
#include <asm/of_device.h>
#include <asm/fbio.h>

#include "sbuslib.h"

/*
 * Local functions.
 */

static int ffb_setcolreg(unsigned, unsigned, unsigned, unsigned,
			 unsigned, struct fb_info *);
static int ffb_blank(int, struct fb_info *);
static void ffb_init_fix(struct fb_info *);

static void ffb_imageblit(struct fb_info *, const struct fb_image *);
static void ffb_fillrect(struct fb_info *, const struct fb_fillrect *);
static void ffb_copyarea(struct fb_info *, const struct fb_copyarea *);
static int ffb_sync(struct fb_info *);
static int ffb_mmap(struct fb_info *, struct vm_area_struct *);
static int ffb_ioctl(struct fb_info *, unsigned int, unsigned long);
static int ffb_pan_display(struct fb_var_screeninfo *, struct fb_info *);

/*
 *  Frame buffer operations
 */

static struct fb_ops ffb_ops = {
	.owner			= THIS_MODULE,
	.fb_setcolreg		= ffb_setcolreg,
	.fb_blank		= ffb_blank,
	.fb_pan_display		= ffb_pan_display,
	.fb_fillrect		= ffb_fillrect,
	.fb_copyarea		= ffb_copyarea,
	.fb_imageblit		= ffb_imageblit,
	.fb_sync		= ffb_sync,
	.fb_mmap		= ffb_mmap,
	.fb_ioctl		= ffb_ioctl,
#ifdef CONFIG_COMPAT
	.fb_compat_ioctl	= sbusfb_compat_ioctl,
#endif
};

/* Register layout and definitions */
#define	FFB_SFB8R_VOFF		0x00000000
#define	FFB_SFB8G_VOFF		0x00400000
#define	FFB_SFB8B_VOFF		0x00800000
#define	FFB_SFB8X_VOFF		0x00c00000
#define	FFB_SFB32_VOFF		0x01000000
#define	FFB_SFB64_VOFF		0x02000000
#define	FFB_FBC_REGS_VOFF	0x04000000
#define	FFB_BM_FBC_REGS_VOFF	0x04002000
#define	FFB_DFB8R_VOFF		0x04004000
#define	FFB_DFB8G_VOFF		0x04404000
#define	FFB_DFB8B_VOFF		0x04804000
#define	FFB_DFB8X_VOFF		0x04c04000
#define	FFB_DFB24_VOFF		0x05004000
#define	FFB_DFB32_VOFF		0x06004000
#define	FFB_DFB422A_VOFF	0x07004000	/* DFB 422 mode write to A */
#define	FFB_DFB422AD_VOFF	0x07804000	/* DFB 422 mode with line doubling */
#define	FFB_DFB24B_VOFF		0x08004000	/* DFB 24bit mode write to B */
#define	FFB_DFB422B_VOFF	0x09004000	/* DFB 422 mode write to B */
#define	FFB_DFB422BD_VOFF	0x09804000	/* DFB 422 mode with line doubling */
#define	FFB_SFB16Z_VOFF		0x0a004000	/* 16bit mode Z planes */
#define	FFB_SFB8Z_VOFF		0x0a404000	/* 8bit mode Z planes */
#define	FFB_SFB422_VOFF		0x0ac04000	/* SFB 422 mode write to A/B */
#define	FFB_SFB422D_VOFF	0x0b404000	/* SFB 422 mode with line doubling */
#define	FFB_FBC_KREGS_VOFF	0x0bc04000
#define	FFB_DAC_VOFF		0x0bc06000
#define	FFB_PROM_VOFF		0x0bc08000
#define	FFB_EXP_VOFF		0x0bc18000

#define	FFB_SFB8R_POFF		0x04000000UL
#define	FFB_SFB8G_POFF		0x04400000UL
#define	FFB_SFB8B_POFF		0x04800000UL
#define	FFB_SFB8X_POFF		0x04c00000UL
#define	FFB_SFB32_POFF		0x05000000UL
#define	FFB_SFB64_POFF		0x06000000UL
#define	FFB_FBC_REGS_POFF	0x00600000UL
#define	FFB_BM_FBC_REGS_POFF	0x00600000UL
#define	FFB_DFB8R_POFF		0x01000000UL
#define	FFB_DFB8G_POFF		0x01400000UL
#define	FFB_DFB8B_POFF		0x01800000UL
#define	FFB_DFB8X_POFF		0x01c00000UL
#define	FFB_DFB24_POFF		0x02000000UL
#define	FFB_DFB32_POFF		0x03000000UL
#define	FFB_FBC_KREGS_POFF	0x00610000UL
#define	FFB_DAC_POFF		0x00400000UL
#define	FFB_PROM_POFF		0x00000000UL
#define	FFB_EXP_POFF		0x00200000UL
#define FFB_DFB422A_POFF	0x09000000UL
#define FFB_DFB422AD_POFF	0x09800000UL
#define FFB_DFB24B_POFF		0x0a000000UL
#define FFB_DFB422B_POFF	0x0b000000UL
#define FFB_DFB422BD_POFF	0x0b800000UL
#define FFB_SFB16Z_POFF		0x0c800000UL
#define FFB_SFB8Z_POFF		0x0c000000UL
#define FFB_SFB422_POFF		0x0d000000UL
#define FFB_SFB422D_POFF	0x0d800000UL

/* Draw operations */
#define FFB_DRAWOP_DOT		0x00
#define FFB_DRAWOP_AADOT	0x01
#define FFB_DRAWOP_BRLINECAP	0x02
#define FFB_DRAWOP_BRLINEOPEN	0x03
#define FFB_DRAWOP_DDLINE	0x04
#define FFB_DRAWOP_AALINE	0x05
#define FFB_DRAWOP_TRIANGLE	0x06
#define FFB_DRAWOP_POLYGON	0x07
#define FFB_DRAWOP_RECTANGLE	0x08
#define FFB_DRAWOP_FASTFILL	0x09
#define FFB_DRAWOP_BCOPY	0x0a
#define FFB_DRAWOP_VSCROLL	0x0b

/* Pixel processor control */
/* Force WID */
#define FFB_PPC_FW_DISABLE	0x800000
#define FFB_PPC_FW_ENABLE	0xc00000
/* Auxiliary clip */
#define FFB_PPC_ACE_DISABLE	0x040000
#define FFB_PPC_ACE_AUX_SUB	0x080000
#define FFB_PPC_ACE_AUX_ADD	0x0c0000
/* Depth cue */
#define FFB_PPC_DCE_DISABLE	0x020000
#define FFB_PPC_DCE_ENABLE	0x030000
/* Alpha blend */
#define FFB_PPC_ABE_DISABLE	0x008000
#define FFB_PPC_ABE_ENABLE	0x00c000
/* View clip */
#define FFB_PPC_VCE_DISABLE	0x001000
#define FFB_PPC_VCE_2D		0x002000
#define FFB_PPC_VCE_3D		0x003000
/* Area pattern */
#define FFB_PPC_APE_DISABLE	0x000800
#define FFB_PPC_APE_ENABLE	0x000c00
/* Transparent background */
#define FFB_PPC_TBE_OPAQUE	0x000200
#define FFB_PPC_TBE_TRANSPARENT	0x000300
/* Z source */
#define FFB_PPC_ZS_VAR		0x000080
#define FFB_PPC_ZS_CONST	0x0000c0
/* Y source */
#define FFB_PPC_YS_VAR		0x000020
#define FFB_PPC_YS_CONST	0x000030
/* X source */
#define FFB_PPC_XS_WID		0x000004
#define FFB_PPC_XS_VAR		0x000008
#define FFB_PPC_XS_CONST	0x00000c
/* Color (BGR) source */
#define FFB_PPC_CS_VAR		0x000002
#define FFB_PPC_CS_CONST	0x000003

#define FFB_ROP_NEW                  0x83
#define FFB_ROP_OLD                  0x85
#define FFB_ROP_NEW_XOR_OLD          0x86

#define FFB_UCSR_FIFO_MASK     0x00000fff
#define FFB_UCSR_FB_BUSY       0x01000000
#define FFB_UCSR_RP_BUSY       0x02000000
#define FFB_UCSR_ALL_BUSY      (FFB_UCSR_RP_BUSY|FFB_UCSR_FB_BUSY)
#define FFB_UCSR_READ_ERR      0x40000000
#define FFB_UCSR_FIFO_OVFL     0x80000000
#define FFB_UCSR_ALL_ERRORS    (FFB_UCSR_READ_ERR|FFB_UCSR_FIFO_OVFL)

struct ffb_fbc {
	/* Next vertex registers */
	u32	xxx1[3];
	u32	alpha;
	u32	red;
	u32	green;
	u32	blue;
	u32	depth;
	u32	y;
	u32	x;
	u32	xxx2[2];
	u32	ryf;
	u32	rxf;
	u32	xxx3[2];
	
	u32	dmyf;
	u32	dmxf;
	u32	xxx4[2];
	u32	ebyi;
	u32	ebxi;
	u32	xxx5[2];
	u32	by;
	u32	bx;
	u32	dy;
	u32	dx;
	u32	bh;
	u32	bw;
	u32	xxx6[2];
	
	u32	xxx7[32];
	
	/* Setup unit vertex state register */
	u32	suvtx;
	u32	xxx8[63];
	
	/* Control registers */
	u32	ppc;
	u32	wid;
	u32	fg;
	u32	bg;
	u32	consty;
	u32	constz;
	u32	xclip;
	u32	dcss;
	u32	vclipmin;
	u32	vclipmax;
	u32	vclipzmin;
	u32	vclipzmax;
	u32	dcsf;
	u32	dcsb;
	u32	dczf;
	u32	dczb;
	
	u32	xxx9;
	u32	blendc;
	u32	blendc1;
	u32	blendc2;
	u32	fbramitc;
	u32	fbc;
	u32	rop;
	u32	cmp;
	u32	matchab;
	u32	matchc;
	u32	magnab;
	u32	magnc;
	u32	fbcfg0;
	u32	fbcfg1;
	u32	fbcfg2;
	u32	fbcfg3;
	
	u32	ppcfg;
	u32	pick;
	u32	fillmode;
	u32	fbramwac;
	u32	pmask;
	u32	xpmask;
	u32	ypmask;
	u32	zpmask;
	u32	clip0min;
	u32	clip0max;
	u32	clip1min;
	u32	clip1max;
	u32	clip2min;
	u32	clip2max;
	u32	clip3min;
	u32	clip3max;
	
	/* New 3dRAM III support regs */
	u32	rawblend2;
	u32	rawpreblend;
	u32	rawstencil;
	u32	rawstencilctl;
	u32	threedram1;
	u32	threedram2;
	u32	passin;
	u32	rawclrdepth;
	u32	rawpmask;
	u32	rawcsrc;
	u32	rawmatch;
	u32	rawmagn;
	u32	rawropblend;
	u32	rawcmp;
	u32	rawwac;
	u32	fbramid;
	
	u32	drawop;
	u32	xxx10[2];
	u32	fontlpat;
	u32	xxx11;
	u32	fontxy;
	u32	fontw;
	u32	fontinc;
	u32	font;
	u32	xxx12[3];
	u32	blend2;
	u32	preblend;
	u32	stencil;
	u32	stencilctl;

	u32	xxx13[4];	
	u32	dcss1;
	u32	dcss2;
	u32	dcss3;
	u32	widpmask;
	u32	dcs2;
	u32	dcs3;
	u32	dcs4;
	u32	xxx14;
	u32	dcd2;
	u32	dcd3;
	u32	dcd4;
	u32	xxx15;
	
	u32	pattern[32];
	
	u32	xxx16[256];
	
	u32	devid;
	u32	xxx17[63];
	
	u32	ucsr;
	u32	xxx18[31];
	
	u32	mer;
};

struct ffb_dac {
	u32	type;
	u32	value;
	u32	type2;
	u32	value2;
};

#define FFB_DAC_UCTRL	0x1001 /* User Control */
#define  FFB_DAC_UCTRL_MANREV	0x00000f00 /* 4-bit Manufacturing Revision */
#define  FFB_DAC_UCTRL_MANREV_SHIFT 8
#define FFB_DAC_TGEN	0x6000 /* Timing Generator */
#define  FFB_DAC_TGEN_VIDE	0x00000001 /* Video Enable */
#define FFB_DAC_DID	0x8000 /* Device Identification */
#define  FFB_DAC_DID_PNUM	0x0ffff000 /* Device Part Number */
#define  FFB_DAC_DID_PNUM_SHIFT 12
#define  FFB_DAC_DID_REV	0xf0000000 /* Device Revision */
#define  FFB_DAC_DID_REV_SHIFT 28

#define FFB_DAC_CUR_CTRL	0x100
#define  FFB_DAC_CUR_CTRL_P0	0x00000001
#define  FFB_DAC_CUR_CTRL_P1	0x00000002

struct ffb_par {
	spinlock_t		lock;
	struct ffb_fbc __iomem	*fbc;
	struct ffb_dac __iomem	*dac;

	u32			flags;
#define FFB_FLAG_AFB		0x00000001 /* AFB m3 or m6 */
#define FFB_FLAG_BLANKED	0x00000002 /* screen is blanked */
#define FFB_FLAG_INVCURSOR	0x00000004 /* DAC has inverted cursor logic */

	u32			fg_cache __attribute__((aligned (8)));
	u32			bg_cache;
	u32			rop_cache;

	int			fifo_cache;

	unsigned long		physbase;
	unsigned long		fbsize;

	int			board_type;
};

static void FFBFifo(struct ffb_par *par, int n)
{
	struct ffb_fbc __iomem *fbc;
	int cache = par->fifo_cache;

	if (cache - n < 0) {
		fbc = par->fbc;
		do {	cache = (upa_readl(&fbc->ucsr) & FFB_UCSR_FIFO_MASK) - 8;
		} while (cache - n < 0);
	}
	par->fifo_cache = cache - n;
}

static void FFBWait(struct ffb_par *par)
{
	struct ffb_fbc __iomem *fbc;
	int limit = 10000;

	fbc = par->fbc;
	do {
		if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_BUSY) == 0)
			break;
		if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_ERRORS) != 0) {
			upa_writel(FFB_UCSR_ALL_ERRORS, &fbc->ucsr);
		}
		udelay(10);
	} while(--limit > 0);
}

static int ffb_sync(struct fb_info *p)
{
	struct ffb_par *par = (struct ffb_par *) p->par;

	FFBWait(par);
	return 0;
}

static __inline__ void ffb_rop(struct ffb_par *par, u32 rop)
{
	if (par->rop_cache != rop) {
		FFBFifo(par, 1);
		upa_writel(rop, &par->fbc->rop);
		par->rop_cache = rop;
	}
}

static void ffb_switch_from_graph(struct ffb_par *par)
{
	struct ffb_fbc __iomem *fbc = par->fbc;
	struct ffb_dac __iomem *dac = par->dac;
	unsigned long flags;

	spin_lock_irqsave(&par->lock, flags);
	FFBWait(par);
	par->fifo_cache = 0;
	FFBFifo(par, 7);
	upa_writel(FFB_PPC_VCE_DISABLE|FFB_PPC_TBE_OPAQUE|
		   FFB_PPC_APE_DISABLE|FFB_PPC_CS_CONST,
		   &fbc->ppc);
	upa_writel(0x2000707f, &fbc->fbc);
	upa_writel(par->rop_cache, &fbc->rop);
	upa_writel(0xffffffff, &fbc->pmask);
	upa_writel((1 << 16) | (0 << 0), &fbc->fontinc);
	upa_writel(par->fg_cache, &fbc->fg);
	upa_writel(par->bg_cache, &fbc->bg);
	FFBWait(par);

	/* Disable cursor.  */
	upa_writel(FFB_DAC_CUR_CTRL, &dac->type2);
	if (par->flags & FFB_FLAG_INVCURSOR)
		upa_writel(0, &dac->value2);
	else
		upa_writel((FFB_DAC_CUR_CTRL_P0 |
			    FFB_DAC_CUR_CTRL_P1), &dac->value2);

	spin_unlock_irqrestore(&par->lock, flags);
}

static int ffb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
	struct ffb_par *par = (struct ffb_par *) info->par;

	/* We just use this to catch switches out of
	 * graphics mode.
	 */
	ffb_switch_from_graph(par);

	if (var->xoffset || var->yoffset || var->vmode)
		return -EINVAL;
	return 0;
}

/**
 *      ffb_fillrect - REQUIRED function. Can use generic routines if 
 *                     non acclerated hardware and packed pixel based.
 *                     Draws a rectangle on the screen.               
 *
 *      @info: frame buffer structure that represents a single frame buffer
 *      @rect: structure defining the rectagle and operation.
 */
static void ffb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
	struct ffb_par *par = (struct ffb_par *) info->par;
	struct ffb_fbc __iomem *fbc = par->fbc;
	unsigned long flags;
	u32 fg;

	BUG_ON(rect->rop != ROP_COPY && rect->rop != ROP_XOR);

	fg = ((u32 *)info->pseudo_palette)[rect->color];

	spin_lock_irqsave(&par->lock, flags);

	if (fg != par->fg_cache) {
		FFBFifo(par, 1);
		upa_writel(fg, &fbc->fg);
		par->fg_cache = fg;
	}

	ffb_rop(par, (rect->rop == ROP_COPY ?
		      FFB_ROP_NEW :
		      FFB_ROP_NEW_XOR_OLD));

	FFBFifo(par, 5);
	upa_writel(FFB_DRAWOP_RECTANGLE, &fbc->drawop);
	upa_writel(rect->dy, &fbc->by);
	upa_writel(rect->dx, &fbc->bx);
	upa_writel(rect->height, &fbc->bh);
	upa_writel(rect->width, &fbc->bw);

	spin_unlock_irqrestore(&par->lock, flags);
}

/**
 *      ffb_copyarea - REQUIRED function. Can use generic routines if
 *                     non acclerated hardware and packed pixel based.
 *                     Copies on area of the screen to another area.
 *
 *      @info: frame buffer structure that represents a single frame buffer
 *      @area: structure defining the source and destination.
 */

static void
ffb_copyarea(struct fb_info *info, const struct fb_copyarea *area) 
{
	struct ffb_par *par = (struct ffb_par *) info->par;
	struct ffb_fbc __iomem *fbc = par->fbc;
	unsigned long flags;

	if (area->dx != area->sx ||
	    area->dy == area->sy) {
		cfb_copyarea(info, area);
		return;
	}

	spin_lock_irqsave(&par->lock, flags);

	ffb_rop(par, FFB_ROP_OLD);

	FFBFifo(par, 7);
	upa_writel(FFB_DRAWOP_VSCROLL, &fbc->drawop);
	upa_writel(area->sy, &fbc->by);
	upa_writel(area->sx, &fbc->bx);
	upa_writel(area->dy, &fbc->dy);
	upa_writel(area->dx, &fbc->dx);
	upa_writel(area->height, &fbc->bh);
	upa_writel(area->width, &fbc->bw);

	spin_unlock_irqrestore(&par->lock, flags);
}

/**
 *      ffb_imageblit - REQUIRED function. Can use generic routines if
 *                      non acclerated hardware and packed pixel based.
 *                      Copies a image from system memory to the screen. 
 *
 *      @info: frame buffer structure that represents a single frame buffer
 *      @image: structure defining the image.
 */
static void ffb_imageblit(struct fb_info *info, const struct fb_image *image)
{
	struct ffb_par *par = (struct ffb_par *) info->par;
	struct ffb_fbc __iomem *fbc = par->fbc;
	const u8 *data = image->data;
	unsigned long flags;
	u32 fg, bg, xy;
	u64 fgbg;
	int i, width, stride;

	if (image->depth > 1) {
		cfb_imageblit(info, image);
		return;
	}

	fg = ((u32 *)info->pseudo_palette)[image->fg_color];
	bg = ((u32 *)info->pseudo_palette)[image->bg_color];
	fgbg = ((u64) fg << 32) | (u64) bg;
	xy = (image->dy << 16) | image->dx;
	width = image->width;
	stride = ((width + 7) >> 3);

	spin_lock_irqsave(&par->lock, flags);

	if (fgbg != *(u64 *)&par->fg_cache) {
		FFBFifo(par, 2);
		upa_writeq(fgbg, &fbc->fg);
		*(u64 *)&par->fg_cache = fgbg;
	}

	if (width >= 32) {
		FFBFifo(par, 1);
		upa_writel(32, &fbc->fontw);
	}

	while (width >= 32) {
		const u8 *next_data = data + 4;

		FFBFifo(par, 1);
		upa_writel(xy, &fbc->fontxy);
		xy += (32 << 0);

		for (i = 0; i < image->height; i++) {
			u32 val = (((u32)data[0] << 24) |
				   ((u32)data[1] << 16) |
				   ((u32)data[2] <<  8) |
				   ((u32)data[3] <<  0));
			FFBFifo(par, 1);
			upa_writel(val, &fbc->font);

			data += stride;
		}

		data = next_data;
		width -= 32;
	}

	if (width) {
		FFBFifo(par, 2);
		upa_writel(width, &fbc->fontw);
		upa_writel(xy, &fbc->fontxy);

		for (i = 0; i < image->height; i++) {
			u32 val = (((u32)data[0] << 24) |
				   ((u32)data[1] << 16) |
				   ((u32)data[2] <<  8) |
				   ((u32)data[3] <<  0));
			FFBFifo(par, 1);
			upa_writel(val, &fbc->font);

			data += stride;
		}
	}

	spin_unlock_irqrestore(&par->lock, flags);
}

static void ffb_fixup_var_rgb(struct fb_var_screeninfo *var)
{
	var->red.offset = 0;
	var->red.length = 8;
	var->green.offset = 8;
	var->green.length = 8;
	var->blue.offset = 16;
	var->blue.length = 8;
	var->transp.offset = 0;
	var->transp.length = 0;
}

/**
 *      ffb_setcolreg - Optional function. Sets a color register.
 *      @regno: boolean, 0 copy local, 1 get_user() function
 *      @red: frame buffer colormap structure
 *      @green: The green value which can be up to 16 bits wide
 *      @blue:  The blue value which can be up to 16 bits wide.
 *      @transp: If supported the alpha value which can be up to 16 bits wide.
 *      @info: frame buffer info structure
 */
static int ffb_setcolreg(unsigned regno,
			 unsigned red, unsigned green, unsigned blue,
			 unsigned transp, struct fb_info *info)
{
	u32 value;

	if (regno >= 16)
		return 1;

	red >>= 8;
	green >>= 8;
	blue >>= 8;

	value = (blue << 16) | (green << 8) | red;
	((u32 *)info->pseudo_palette)[regno] = value;

	return 0;
}

/**
 *      ffb_blank - Optional function.  Blanks the display.
 *      @blank_mode: the blank mode we want.
 *      @info: frame buffer structure that represents a single frame buffer
 */
static int
ffb_blank(int blank, struct fb_info *info)
{
	struct ffb_par *par = (struct ffb_par *) info->par;
	struct ffb_dac __iomem *dac = par->dac;
	unsigned long flags;
	u32 val;
	int i;

	spin_lock_irqsave(&par->lock, flags);

	FFBWait(par);

	upa_writel(FFB_DAC_TGEN, &dac->type);
	val = upa_readl(&dac->value);
	switch (blank) {
	case FB_BLANK_UNBLANK: /* Unblanking */
		val |= FFB_DAC_TGEN_VIDE;
		par->flags &= ~FFB_FLAG_BLANKED;
		break;

	case FB_BLANK_NORMAL: /* Normal blanking */
	case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
	case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
	case FB_BLANK_POWERDOWN: /* Poweroff */
		val &= ~FFB_DAC_TGEN_VIDE;
		par->flags |= FFB_FLAG_BLANKED;
		break;
	}
	upa_writel(FFB_DAC_TGEN, &dac->type);
	upa_writel(val, &dac->value);
	for (i = 0; i < 10; i++) {
		upa_writel(FFB_DAC_TGEN, &dac->type);
		upa_readl(&dac->value);
	}

	spin_unlock_irqrestore(&par->lock, flags);

	return 0;
}

static struct sbus_mmap_map ffb_mmap_map[] = {
	{
		.voff	= FFB_SFB8R_VOFF,
		.poff	= FFB_SFB8R_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_SFB8G_VOFF,
		.poff	= FFB_SFB8G_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_SFB8B_VOFF,
		.poff	= FFB_SFB8B_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_SFB8X_VOFF,
		.poff	= FFB_SFB8X_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_SFB32_VOFF,
		.poff	= FFB_SFB32_POFF,
		.size	= 0x1000000
	},
	{
		.voff	= FFB_SFB64_VOFF,
		.poff	= FFB_SFB64_POFF,
		.size	= 0x2000000
	},
	{
		.voff	= FFB_FBC_REGS_VOFF,
		.poff	= FFB_FBC_REGS_POFF,
		.size	= 0x0002000
	},
	{
		.voff	= FFB_BM_FBC_REGS_VOFF,
		.poff	= FFB_BM_FBC_REGS_POFF,
		.size	= 0x0002000
	},
	{
		.voff	= FFB_DFB8R_VOFF,
		.poff	= FFB_DFB8R_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_DFB8G_VOFF,
		.poff	= FFB_DFB8G_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_DFB8B_VOFF,
		.poff	= FFB_DFB8B_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_DFB8X_VOFF,
		.poff	= FFB_DFB8X_POFF,
		.size	= 0x0400000
	},
	{
		.voff	= FFB_DFB24_VOFF,
		.poff	= FFB_DFB24_POFF,
		.size	= 0x1000000
	},
	{
		.voff	= FFB_DFB32_VOFF,
		.poff	= FFB_DFB32_POFF,
		.size	= 0x1000000
	},
	{
		.voff	= FFB_FBC_KREGS_VOFF,
		.poff	= FFB_FBC_KREGS_POFF,
		.size	= 0x0002000
	},
	{
		.voff	= FFB_DAC_VOFF,
		.poff	= FFB_DAC_POFF,
		.size	= 0x0002000
	},
	{
		.voff	= FFB_PROM_VOFF,
		.poff	= FFB_PROM_POFF,
		.size	= 0x0010000
	},
	{
		.voff	= FFB_EXP_VOFF,
		.poff	= FFB_EXP_POFF,
		.size	= 0x0002000
	},
	{
		.voff	= FFB_DFB422A_VOFF,
		.poff	= FFB_DFB422A_POFF,
		.size	= 0x0800000
	},
	{
		.voff	= FFB_DFB422AD_VOFF,
		.poff	= FFB_DFB422AD_POFF,
		.size	= 0x0800000
	},
	{
		.voff	= FFB_DFB24B_VOFF,
		.poff	= FFB_DFB24B_POFF,
		.size	= 0x1000000
	},
	{
		.voff	= FFB_DFB422B_VOFF,
		.poff	= FFB_DFB422B_POFF,
		.size	= 0x0800000
	},
	{
		.voff	= FFB_DFB422BD_VOFF,
		.poff	= FFB_DFB422BD_POFF,
		.size	= 0x0800000
	},
	{
		.voff	= FFB_SFB16Z_VOFF,
		.poff	= FFB_SFB16Z_POFF,
		.size	= 0x0800000
	},
	{
		.voff	= FFB_SFB8Z_VOFF,
		.poff	= FFB_SFB8Z_POFF,
		.size	= 0x0800000
	},
	{
		.voff	= FFB_SFB422_VOFF,
		.poff	= FFB_SFB422_POFF,
		.size	= 0x0800000
	},
	{
		.voff	= FFB_SFB422D_VOFF,
		.poff	= FFB_SFB422D_POFF,
		.size	= 0x0800000
	},
	{ .size = 0 }
};

static int ffb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct ffb_par *par = (struct ffb_par *)info->par;

	return sbusfb_mmap_helper(ffb_mmap_map,
				  par->physbase, par->fbsize,
				  0, vma);
}

static int ffb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
{
	struct ffb_par *par = (struct ffb_par *) info->par;

	return sbusfb_ioctl_helper(cmd, arg, info,
				   FBTYPE_CREATOR, 24, par->fbsize);
}

/*
 *  Initialisation
 */

static void
ffb_init_fix(struct fb_info *info)
{
	struct ffb_par *par = (struct ffb_par *)info->par;
	const char *ffb_type_name;

	if (!(par->flags & FFB_FLAG_AFB)) {
		if ((par->board_type & 0x7) == 0x3)
			ffb_type_name = "Creator 3D";
		else
			ffb_type_name = "Creator";
	} else
		ffb_type_name = "Elite 3D";

	strlcpy(info->fix.id, ffb_type_name, sizeof(info->fix.id));

	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.visual = FB_VISUAL_TRUECOLOR;

	/* Framebuffer length is the same regardless of resolution. */
	info->fix.line_length = 8192;

	info->fix.accel = FB_ACCEL_SUN_CREATOR;
}

struct all_info {
	struct fb_info info;
	struct ffb_par par;
	u32 pseudo_palette[16];
};

static int ffb_init_one(struct of_device *op)
{
	struct device_node *dp = op->node;
	struct ffb_fbc __iomem *fbc;
	struct ffb_dac __iomem *dac;
	struct all_info *all;
	int err;
	u32 dac_pnum, dac_rev, dac_mrev;

	all = kzalloc(sizeof(*all), GFP_KERNEL);
	if (!all)
		return -ENOMEM;

	spin_lock_init(&all->par.lock);
	all->par.fbc = of_ioremap(&op->resource[2], 0,
				  sizeof(struct ffb_fbc), "ffb fbc");
	if (!all->par.fbc) {
		kfree(all);
		return -ENOMEM;
	}

	all->par.dac = of_ioremap(&op->resource[1], 0,
				  sizeof(struct ffb_dac), "ffb dac");
	if (!all->par.dac) {
		of_iounmap(&op->resource[2],
			   all->par.fbc, sizeof(struct ffb_fbc));
		kfree(all);
		return -ENOMEM;
	}

	all->par.rop_cache = FFB_ROP_NEW;
	all->par.physbase = op->resource[0].start;

	/* Don't mention copyarea, so SCROLL_REDRAW is always
	 * used.  It is the fastest on this chip.
	 */
	all->info.flags = (FBINFO_DEFAULT |
			   /* FBINFO_HWACCEL_COPYAREA | */
			   FBINFO_HWACCEL_FILLRECT |
			   FBINFO_HWACCEL_IMAGEBLIT);
	all->info.fbops = &ffb_ops;
	all->info.screen_base = (char *) all->par.physbase + FFB_DFB24_POFF;
	all->info.par = &all->par;
	all->info.pseudo_palette = all->pseudo_palette;

	sbusfb_fill_var(&all->info.var, dp->node, 32);
	all->par.fbsize = PAGE_ALIGN(all->info.var.xres *
				     all->info.var.yres *
				     4);
	ffb_fixup_var_rgb(&all->info.var);

	all->info.var.accel_flags = FB_ACCELF_TEXT;

	if (!strcmp(dp->name, "SUNW,afb"))
		all->par.flags |= FFB_FLAG_AFB;

	all->par.board_type = of_getintprop_default(dp, "board_type", 0);

	fbc = all->par.fbc;
	if ((upa_readl(&fbc->ucsr) & FFB_UCSR_ALL_ERRORS) != 0)
		upa_writel(FFB_UCSR_ALL_ERRORS, &fbc->ucsr);

	dac = all->par.dac;
	upa_writel(FFB_DAC_DID, &dac->type);
	dac_pnum = upa_readl(&dac->value);
	dac_rev = (dac_pnum & FFB_DAC_DID_REV) >> FFB_DAC_DID_REV_SHIFT;
	dac_pnum = (dac_pnum & FFB_DAC_DID_PNUM) >> FFB_DAC_DID_PNUM_SHIFT;

	upa_writel(FFB_DAC_UCTRL, &dac->type);
	dac_mrev = upa_readl(&dac->value);
	dac_mrev = (dac_mrev & FFB_DAC_UCTRL_MANREV) >>
		FFB_DAC_UCTRL_MANREV_SHIFT;

	/* Elite3D has different DAC revision numbering, and no DAC revisions
	 * have the reversed meaning of cursor enable.  Otherwise, Pacifica 1
	 * ramdacs with manufacturing revision less than 3 have inverted
	 * cursor logic.  We identify Pacifica 1 as not Pacifica 2, the
	 * latter having a part number value of 0x236e.
	 */
	if ((all->par.flags & FFB_FLAG_AFB) || dac_pnum == 0x236e) {
		all->par.flags &= ~FFB_FLAG_INVCURSOR;
	} else {
		if (dac_mrev < 3)
			all->par.flags |= FFB_FLAG_INVCURSOR;
	}

	ffb_switch_from_graph(&all->par);

	/* Unblank it just to be sure.  When there are multiple
	 * FFB/AFB cards in the system, or it is not the OBP
	 * chosen console, it will have video outputs off in
	 * the DAC.
	 */
	ffb_blank(0, &all->info);

	if (fb_alloc_cmap(&all->info.cmap, 256, 0)) {
		printk(KERN_ERR "ffb: Could not allocate color map.\n");
		of_iounmap(&op->resource[2],
			   all->par.fbc, sizeof(struct ffb_fbc));
		of_iounmap(&op->resource[1],
			   all->par.dac, sizeof(struct ffb_dac));
		kfree(all);
		return -ENOMEM;
	}

	ffb_init_fix(&all->info);

	err = register_framebuffer(&all->info);
	if (err < 0) {
		printk(KERN_ERR "ffb: Could not register framebuffer.\n");
		fb_dealloc_cmap(&all->info.cmap);
		of_iounmap(&op->resource[2],
			   all->par.fbc, sizeof(struct ffb_fbc));
		of_iounmap(&op->resource[1],
			   all->par.dac, sizeof(struct ffb_dac));
		kfree(all);
		return err;
	}

	dev_set_drvdata(&op->dev, all);

	printk("%s: %s at %016lx, type %d, "
	       "DAC pnum[%x] rev[%d] manuf_rev[%d]\n",
	       dp->full_name,
	       ((all->par.flags & FFB_FLAG_AFB) ? "AFB" : "FFB"),
	       all->par.physbase, all->par.board_type,
	       dac_pnum, dac_rev, dac_mrev);

	return 0;
}

static int __devinit ffb_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct of_device *op = to_of_device(&dev->dev);

	return ffb_init_one(op);
}

static int __devexit ffb_remove(struct of_device *op)
{
	struct all_info *all = dev_get_drvdata(&op->dev);

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

	of_iounmap(&op->resource[2], all->par.fbc, sizeof(struct ffb_fbc));
	of_iounmap(&op->resource[1], all->par.dac, sizeof(struct ffb_dac));

	kfree(all);

	dev_set_drvdata(&op->dev, NULL);

	return 0;
}

static struct of_device_id ffb_match[] = {
	{
		.name = "SUNW,ffb",
	},
	{
		.name = "SUNW,afb",
	},
	{},
};
MODULE_DEVICE_TABLE(of, ffb_match);

static struct of_platform_driver ffb_driver = {
	.name		= "ffb",
	.match_table	= ffb_match,
	.probe		= ffb_probe,
	.remove		= __devexit_p(ffb_remove),
};

int __init ffb_init(void)
{
	if (fb_get_options("ffb", NULL))
		return -ENODEV;

	return of_register_driver(&ffb_driver, &of_bus_type);
}

void __exit ffb_exit(void)
{
	of_unregister_driver(&ffb_driver);
}

module_init(ffb_init);
module_exit(ffb_exit);

MODULE_DESCRIPTION("framebuffer driver for Creator/Elite3D chipsets");
MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_VERSION("2.0");
MODULE_LICENSE("GPL");