aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/video/pms.c
blob: d38d3dc4a0120c0c242daa87150b4ae930856a32 (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
/*
 *	Media Vision Pro Movie Studio
 *			or
 *	"all you need is an I2C bus some RAM and a prayer"
 *
 *	This draws heavily on code
 *
 *	(c) Wolfgang Koehler,  wolf@first.gmd.de, Dec. 1994
 *	Kiefernring 15
 *	14478 Potsdam, Germany
 *
 *	Most of this code is directly derived from his userspace driver.
 *	His driver works so send any reports to alan@redhat.com unless the
 *	userspace driver also doesn't work for you...
 *
 *      Changes:
 *      08/07/2003        Daniele Bellucci <bellucda@tiscali.it>
 *                        - pms_capture: report back -EFAULT
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/sched.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <linux/mutex.h>

#include <asm/uaccess.h>


#define MOTOROLA	1
#define PHILIPS2	2
#define PHILIPS1	3
#define MVVMEMORYWIDTH	0x40		/* 512 bytes */

struct pms_device
{
	struct video_device v;
	struct video_picture picture;
	int height;
	int width;
	struct mutex lock;
};

struct i2c_info
{
	u8 slave;
	u8 sub;
	u8 data;
	u8 hits;
};

static int i2c_count 		= 0;
static struct i2c_info i2cinfo[64];

static int decoder 		= PHILIPS2;
static int standard 		= 0;	/* 0 - auto 1 - ntsc 2 - pal 3 - secam */

/*
 *	I/O ports and Shared Memory
 */

static int io_port		=	0x250;
static int data_port		=	0x251;
static int mem_base		=	0xC8000;
static void __iomem *mem;
static int video_nr             =       -1;



static inline void mvv_write(u8 index, u8 value)
{
	outw(index|(value<<8), io_port);
}

static inline u8 mvv_read(u8 index)
{
	outb(index, io_port);
	return inb(data_port);
}

static int pms_i2c_stat(u8 slave)
{
	int counter;
	int i;

	outb(0x28, io_port);

	counter=0;
	while((inb(data_port)&0x01)==0)
		if(counter++==256)
			break;

	while((inb(data_port)&0x01)!=0)
		if(counter++==256)
			break;

	outb(slave, io_port);

	counter=0;
	while((inb(data_port)&0x01)==0)
		if(counter++==256)
			break;

	while((inb(data_port)&0x01)!=0)
		if(counter++==256)
			break;

	for(i=0;i<12;i++)
	{
		char st=inb(data_port);
		if((st&2)!=0)
			return -1;
		if((st&1)==0)
			break;
	}
	outb(0x29, io_port);
	return inb(data_port);
}

static int pms_i2c_write(u16 slave, u16 sub, u16 data)
{
	int skip=0;
	int count;
	int i;

	for(i=0;i<i2c_count;i++)
	{
		if((i2cinfo[i].slave==slave) &&
		   (i2cinfo[i].sub == sub))
		{
			if(i2cinfo[i].data==data)
				skip=1;
			i2cinfo[i].data=data;
			i=i2c_count+1;
		}
	}

	if(i==i2c_count && i2c_count<64)
	{
		i2cinfo[i2c_count].slave=slave;
		i2cinfo[i2c_count].sub=sub;
		i2cinfo[i2c_count].data=data;
		i2c_count++;
	}

	if(skip)
		return 0;

	mvv_write(0x29, sub);
	mvv_write(0x2A, data);
	mvv_write(0x28, slave);

	outb(0x28, io_port);

	count=0;
	while((inb(data_port)&1)==0)
		if(count>255)
			break;
	while((inb(data_port)&1)!=0)
		if(count>255)
			break;

	count=inb(data_port);

	if(count&2)
		return -1;
	return count;
}

static int pms_i2c_read(int slave, int sub)
{
	int i=0;
	for(i=0;i<i2c_count;i++)
	{
		if(i2cinfo[i].slave==slave && i2cinfo[i].sub==sub)
			return i2cinfo[i].data;
	}
	return 0;
}


static void pms_i2c_andor(int slave, int sub, int and, int or)
{
	u8 tmp;

	tmp=pms_i2c_read(slave, sub);
	tmp = (tmp&and)|or;
	pms_i2c_write(slave, sub, tmp);
}

/*
 *	Control functions
 */


static void pms_videosource(short source)
{
	mvv_write(0x2E, source?0x31:0x30);
}

static void pms_hue(short hue)
{
	switch(decoder)
	{
		case MOTOROLA:
			pms_i2c_write(0x8A, 0x00, hue);
			break;
		case PHILIPS2:
			pms_i2c_write(0x8A, 0x07, hue);
			break;
		case PHILIPS1:
			pms_i2c_write(0x42, 0x07, hue);
			break;
	}
}

static void pms_colour(short colour)
{
	switch(decoder)
	{
		case MOTOROLA:
			pms_i2c_write(0x8A, 0x00, colour);
			break;
		case PHILIPS1:
			pms_i2c_write(0x42, 0x12, colour);
			break;
	}
}


static void pms_contrast(short contrast)
{
	switch(decoder)
	{
		case MOTOROLA:
			pms_i2c_write(0x8A, 0x00, contrast);
			break;
		case PHILIPS1:
			pms_i2c_write(0x42, 0x13, contrast);
			break;
	}
}

static void pms_brightness(short brightness)
{
	switch(decoder)
	{
		case MOTOROLA:
			pms_i2c_write(0x8A, 0x00, brightness);
			pms_i2c_write(0x8A, 0x00, brightness);
			pms_i2c_write(0x8A, 0x00, brightness);
			break;
		case PHILIPS1:
			pms_i2c_write(0x42, 0x19, brightness);
			break;
	}
}


static void pms_format(short format)
{
	int target;
	standard = format;

	if(decoder==PHILIPS1)
		target=0x42;
	else if(decoder==PHILIPS2)
		target=0x8A;
	else
		return;

	switch(format)
	{
		case 0:	/* Auto */
			pms_i2c_andor(target, 0x0D, 0xFE,0x00);
			pms_i2c_andor(target, 0x0F, 0x3F,0x80);
			break;
		case 1: /* NTSC */
			pms_i2c_andor(target, 0x0D, 0xFE, 0x00);
			pms_i2c_andor(target, 0x0F, 0x3F, 0x40);
			break;
		case 2: /* PAL */
			pms_i2c_andor(target, 0x0D, 0xFE, 0x00);
			pms_i2c_andor(target, 0x0F, 0x3F, 0x00);
			break;
		case 3:	/* SECAM */
			pms_i2c_andor(target, 0x0D, 0xFE, 0x01);
			pms_i2c_andor(target, 0x0F, 0x3F, 0x00);
			break;
	}
}

#ifdef FOR_FUTURE_EXPANSION

/*
 *	These features of the PMS card are not currently exposes. They
 *	could become a private v4l ioctl for PMSCONFIG or somesuch if
 *	people need it. We also don't yet use the PMS interrupt.
 */

static void pms_hstart(short start)
{
	switch(decoder)
	{
		case PHILIPS1:
			pms_i2c_write(0x8A, 0x05, start);
			pms_i2c_write(0x8A, 0x18, start);
			break;
		case PHILIPS2:
			pms_i2c_write(0x42, 0x05, start);
			pms_i2c_write(0x42, 0x18, start);
			break;
	}
}

/*
 *	Bandpass filters
 */

static void pms_bandpass(short pass)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x06, 0xCF, (pass&0x03)<<4);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x06, 0xCF, (pass&0x03)<<4);
}

static void pms_antisnow(short snow)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x06, 0xF3, (snow&0x03)<<2);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x06, 0xF3, (snow&0x03)<<2);
}

static void pms_sharpness(short sharp)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x06, 0xFC, sharp&0x03);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x06, 0xFC, sharp&0x03);
}

static void pms_chromaagc(short agc)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x0C, 0x9F, (agc&0x03)<<5);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x0C, 0x9F, (agc&0x03)<<5);
}

static void pms_vertnoise(short noise)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x10, 0xFC, noise&3);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x10, 0xFC, noise&3);
}

static void pms_forcecolour(short colour)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x0C, 0x7F, (colour&1)<<7);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x0C, 0x7, (colour&1)<<7);
}

static void pms_antigamma(short gamma)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0xB8, 0x00, 0x7F, (gamma&1)<<7);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x20, 0x7, (gamma&1)<<7);
}

static void pms_prefilter(short filter)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x06, 0xBF, (filter&1)<<6);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x06, 0xBF, (filter&1)<<6);
}

static void pms_hfilter(short filter)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0xB8, 0x04, 0x1F, (filter&7)<<5);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x24, 0x1F, (filter&7)<<5);
}

static void pms_vfilter(short filter)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0xB8, 0x08, 0x9F, (filter&3)<<5);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x28, 0x9F, (filter&3)<<5);
}

static void pms_killcolour(short colour)
{
	if(decoder==PHILIPS2)
	{
		pms_i2c_andor(0x8A, 0x08, 0x07, (colour&0x1F)<<3);
		pms_i2c_andor(0x8A, 0x09, 0x07, (colour&0x1F)<<3);
	}
	else if(decoder==PHILIPS1)
	{
		pms_i2c_andor(0x42, 0x08, 0x07, (colour&0x1F)<<3);
		pms_i2c_andor(0x42, 0x09, 0x07, (colour&0x1F)<<3);
	}
}

static void pms_chromagain(short chroma)
{
	if(decoder==PHILIPS2)
	{
		pms_i2c_write(0x8A, 0x11, chroma);
	}
	else if(decoder==PHILIPS1)
	{
		pms_i2c_write(0x42, 0x11, chroma);
	}
}


static void pms_spacialcompl(short data)
{
	mvv_write(0x3B, data);
}

static void pms_spacialcomph(short data)
{
	mvv_write(0x3A, data);
}

static void pms_vstart(short start)
{
	mvv_write(0x16, start);
	mvv_write(0x17, (start>>8)&0x01);
}

#endif

static void pms_secamcross(short cross)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A, 0x0F, 0xDF, (cross&1)<<5);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42, 0x0F, 0xDF, (cross&1)<<5);
}


static void pms_swsense(short sense)
{
	if(decoder==PHILIPS2)
	{
		pms_i2c_write(0x8A, 0x0A, sense);
		pms_i2c_write(0x8A, 0x0B, sense);
	}
	else if(decoder==PHILIPS1)
	{
		pms_i2c_write(0x42, 0x0A, sense);
		pms_i2c_write(0x42, 0x0B, sense);
	}
}


static void pms_framerate(short frr)
{
	int fps=(standard==1)?30:25;
	if(frr==0)
		return;
	fps=fps/frr;
	mvv_write(0x14,0x80|fps);
	mvv_write(0x15,1);
}

static void pms_vert(u8 deciden, u8 decinum)
{
	mvv_write(0x1C, deciden);	/* Denominator */
	mvv_write(0x1D, decinum);	/* Numerator */
}

/*
 *	Turn 16bit ratios into best small ratio the chipset can grok
 */

static void pms_vertdeci(unsigned short decinum, unsigned short deciden)
{
	/* Knock it down by /5 once */
	if(decinum%5==0)
	{
		deciden/=5;
		decinum/=5;
	}
	/*
	 *	3's
	 */
	while(decinum%3==0 && deciden%3==0)
	{
		deciden/=3;
		decinum/=3;
	}
	/*
	 *	2's
	 */
	while(decinum%2==0 && deciden%2==0)
	{
		decinum/=2;
		deciden/=2;
	}
	/*
	 *	Fudgyify
	 */
	while(deciden>32)
	{
		deciden/=2;
		decinum=(decinum+1)/2;
	}
	if(deciden==32)
		deciden--;
	pms_vert(deciden,decinum);
}

static void pms_horzdeci(short decinum, short deciden)
{
	if(decinum<=512)
	{
		if(decinum%5==0)
		{
			decinum/=5;
			deciden/=5;
		}
	}
	else
	{
		decinum=512;
		deciden=640;	/* 768 would be ideal */
	}

	while(((decinum|deciden)&1)==0)
	{
		decinum>>=1;
		deciden>>=1;
	}
	while(deciden>32)
	{
		deciden>>=1;
		decinum=(decinum+1)>>1;
	}
	if(deciden==32)
		deciden--;

	mvv_write(0x24, 0x80|deciden);
	mvv_write(0x25, decinum);
}

static void pms_resolution(short width, short height)
{
	int fg_height;

	fg_height=height;
	if(fg_height>280)
		fg_height=280;

	mvv_write(0x18, fg_height);
	mvv_write(0x19, fg_height>>8);

	if(standard==1)
	{
		mvv_write(0x1A, 0xFC);
		mvv_write(0x1B, 0x00);
		if(height>fg_height)
			pms_vertdeci(240,240);
		else
			pms_vertdeci(fg_height,240);
	}
	else
	{
		mvv_write(0x1A, 0x1A);
		mvv_write(0x1B, 0x01);
		if(fg_height>256)
			pms_vertdeci(270,270);
		else
			pms_vertdeci(fg_height, 270);
	}
	mvv_write(0x12,0);
	mvv_write(0x13, MVVMEMORYWIDTH);
	mvv_write(0x42, 0x00);
	mvv_write(0x43, 0x00);
	mvv_write(0x44, MVVMEMORYWIDTH);

	mvv_write(0x22, width+8);
	mvv_write(0x23, (width+8)>> 8);

	if(standard==1)
		pms_horzdeci(width,640);
	else
		pms_horzdeci(width+8, 768);

	mvv_write(0x30, mvv_read(0x30)&0xFE);
	mvv_write(0x08, mvv_read(0x08)|0x01);
	mvv_write(0x01, mvv_read(0x01)&0xFD);
	mvv_write(0x32, 0x00);
	mvv_write(0x33, MVVMEMORYWIDTH);
}


/*
 *	Set Input
 */

static void pms_vcrinput(short input)
{
	if(decoder==PHILIPS2)
		pms_i2c_andor(0x8A,0x0D,0x7F,(input&1)<<7);
	else if(decoder==PHILIPS1)
		pms_i2c_andor(0x42,0x0D,0x7F,(input&1)<<7);
}


static int pms_capture(struct pms_device *dev, char __user *buf, int rgb555, int count)
{
	int y;
	int dw = 2*dev->width;

	char tmp[dw+32]; /* using a temp buffer is faster than direct  */
	int cnt = 0;
	int len=0;
	unsigned char r8 = 0x5;  /* value for reg8  */

	if (rgb555)
		r8 |= 0x20; /* else use untranslated rgb = 565 */
	mvv_write(0x08,r8); /* capture rgb555/565, init DRAM, PC enable */

/*	printf("%d %d %d %d %d %x %x\n",width,height,voff,nom,den,mvv_buf); */

	for (y = 0; y < dev->height; y++ )
	{
		writeb(0, mem);  /* synchronisiert neue Zeile */

		/*
		 *	This is in truth a fifo, be very careful as if you
		 *	forgot this odd things will occur 8)
		 */

		memcpy_fromio(tmp, mem, dw+32); /* discard 16 word   */
		cnt -= dev->height;
		while (cnt <= 0)
		{
			/*
			 *	Don't copy too far
			 */
			int dt=dw;
			if(dt+len>count)
				dt=count-len;
			cnt += dev->height;
			if (copy_to_user(buf, tmp+32, dt))
				return len ? len : -EFAULT;
			buf += dt;
			len += dt;
		}
	}
	return len;
}


/*
 *	Video4linux interfacing
 */

static int pms_do_ioctl(struct inode *inode, struct file *file,
			unsigned int cmd, void *arg)
{
	struct video_device *dev = video_devdata(file);
	struct pms_device *pd=(struct pms_device *)dev;

	switch(cmd)
	{
		case VIDIOCGCAP:
		{
			struct video_capability *b = arg;
			strcpy(b->name, "Mediavision PMS");
			b->type = VID_TYPE_CAPTURE|VID_TYPE_SCALES;
			b->channels = 4;
			b->audios = 0;
			b->maxwidth = 640;
			b->maxheight = 480;
			b->minwidth = 16;
			b->minheight = 16;
			return 0;
		}
		case VIDIOCGCHAN:
		{
			struct video_channel *v = arg;
			if(v->channel<0 || v->channel>3)
				return -EINVAL;
			v->flags=0;
			v->tuners=1;
			/* Good question.. its composite or SVHS so.. */
			v->type = VIDEO_TYPE_CAMERA;
			switch(v->channel)
			{
				case 0:
					strcpy(v->name, "Composite");break;
				case 1:
					strcpy(v->name, "SVideo");break;
				case 2:
					strcpy(v->name, "Composite(VCR)");break;
				case 3:
					strcpy(v->name, "SVideo(VCR)");break;
			}
			return 0;
		}
		case VIDIOCSCHAN:
		{
			struct video_channel *v = arg;
			if(v->channel<0 || v->channel>3)
				return -EINVAL;
			mutex_lock(&pd->lock);
			pms_videosource(v->channel&1);
			pms_vcrinput(v->channel>>1);
			mutex_unlock(&pd->lock);
			return 0;
		}
		case VIDIOCGTUNER:
		{
			struct video_tuner *v = arg;
			if(v->tuner)
				return -EINVAL;
			strcpy(v->name, "Format");
			v->rangelow=0;
			v->rangehigh=0;
			v->flags= VIDEO_TUNER_PAL|VIDEO_TUNER_NTSC|VIDEO_TUNER_SECAM;
			switch(standard)
			{
				case 0:
					v->mode = VIDEO_MODE_AUTO;
					break;
				case 1:
					v->mode = VIDEO_MODE_NTSC;
					break;
				case 2:
					v->mode = VIDEO_MODE_PAL;
					break;
				case 3:
					v->mode = VIDEO_MODE_SECAM;
					break;
			}
			return 0;
		}
		case VIDIOCSTUNER:
		{
			struct video_tuner *v = arg;
			if(v->tuner)
				return -EINVAL;
			mutex_lock(&pd->lock);
			switch(v->mode)
			{
				case VIDEO_MODE_AUTO:
					pms_framerate(25);
					pms_secamcross(0);
					pms_format(0);
					break;
				case VIDEO_MODE_NTSC:
					pms_framerate(30);
					pms_secamcross(0);
					pms_format(1);
					break;
				case VIDEO_MODE_PAL:
					pms_framerate(25);
					pms_secamcross(0);
					pms_format(2);
					break;
				case VIDEO_MODE_SECAM:
					pms_framerate(25);
					pms_secamcross(1);
					pms_format(2);
					break;
				default:
					mutex_unlock(&pd->lock);
					return -EINVAL;
			}
			mutex_unlock(&pd->lock);
			return 0;
		}
		case VIDIOCGPICT:
		{
			struct video_picture *p = arg;
			*p = pd->picture;
			return 0;
		}
		case VIDIOCSPICT:
		{
			struct video_picture *p = arg;
			if(!((p->palette==VIDEO_PALETTE_RGB565 && p->depth==16)
			    ||(p->palette==VIDEO_PALETTE_RGB555 && p->depth==15)))
				return -EINVAL;
			pd->picture= *p;

			/*
			 *	Now load the card.
			 */

			mutex_lock(&pd->lock);
			pms_brightness(p->brightness>>8);
			pms_hue(p->hue>>8);
			pms_colour(p->colour>>8);
			pms_contrast(p->contrast>>8);
			mutex_unlock(&pd->lock);
			return 0;
		}
		case VIDIOCSWIN:
		{
			struct video_window *vw = arg;
			if(vw->flags)
				return -EINVAL;
			if(vw->clipcount)
				return -EINVAL;
			if(vw->height<16||vw->height>480)
				return -EINVAL;
			if(vw->width<16||vw->width>640)
				return -EINVAL;
			pd->width=vw->width;
			pd->height=vw->height;
			mutex_lock(&pd->lock);
			pms_resolution(pd->width, pd->height);
			mutex_unlock(&pd->lock);			/* Ok we figured out what to use from our wide choice */
			return 0;
		}
		case VIDIOCGWIN:
		{
			struct video_window *vw = arg;
			memset(vw,0,sizeof(*vw));
			vw->width=pd->width;
			vw->height=pd->height;
			return 0;
		}
		case VIDIOCKEY:
			return 0;
		case VIDIOCCAPTURE:
		case VIDIOCGFBUF:
		case VIDIOCSFBUF:
		case VIDIOCGFREQ:
		case VIDIOCSFREQ:
		case VIDIOCGAUDIO:
		case VIDIOCSAUDIO:
			return -EINVAL;
		default:
			return -ENOIOCTLCMD;
	}
	return 0;
}

static int pms_ioctl(struct inode *inode, struct file *file,
		     unsigned int cmd, unsigned long arg)
{
	return video_usercopy(inode, file, cmd, arg, pms_do_ioctl);
}

static ssize_t pms_read(struct file *file, char __user *buf,
		    size_t count, loff_t *ppos)
{
	struct video_device *v = video_devdata(file);
	struct pms_device *pd=(struct pms_device *)v;
	int len;

	mutex_lock(&pd->lock);
	len=pms_capture(pd, buf, (pd->picture.depth==16)?0:1,count);
	mutex_unlock(&pd->lock);
	return len;
}

static const struct file_operations pms_fops = {
	.owner		= THIS_MODULE,
	.open           = video_exclusive_open,
	.release        = video_exclusive_release,
	.ioctl          = pms_ioctl,
	.compat_ioctl	= v4l_compat_ioctl32,
	.read           = pms_read,
	.llseek         = no_llseek,
};

static struct video_device pms_template=
{
	.owner		= THIS_MODULE,
	.name		= "Mediavision PMS",
	.type		= VID_TYPE_CAPTURE,
	.hardware	= VID_HARDWARE_PMS,
	.fops           = &pms_fops,
};

static struct pms_device pms_device;


/*
 *	Probe for and initialise the Mediavision PMS
 */

static int init_mediavision(void)
{
	int id;
	int idec, decst;
	int i;

	unsigned char i2c_defs[]={
		0x4C,0x30,0x00,0xE8,
		0xB6,0xE2,0x00,0x00,
		0xFF,0xFF,0x00,0x00,
		0x00,0x00,0x78,0x98,
		0x00,0x00,0x00,0x00,
		0x34,0x0A,0xF4,0xCE,
		0xE4
	};

	mem = ioremap(mem_base, 0x800);
	if (!mem)
		return -ENOMEM;

	if (!request_region(0x9A01, 1, "Mediavision PMS config"))
	{
		printk(KERN_WARNING "mediavision: unable to detect: 0x9A01 in use.\n");
		iounmap(mem);
		return -EBUSY;
	}
	if (!request_region(io_port, 3, "Mediavision PMS"))
	{
		printk(KERN_WARNING "mediavision: I/O port %d in use.\n", io_port);
		release_region(0x9A01, 1);
		iounmap(mem);
		return -EBUSY;
	}
	outb(0xB8, 0x9A01);		/* Unlock */
	outb(io_port>>4, 0x9A01);	/* Set IO port */


	id=mvv_read(3);
	decst=pms_i2c_stat(0x43);

	if(decst!=-1)
		idec=2;
	else if(pms_i2c_stat(0xb9)!=-1)
		idec=3;
	else if(pms_i2c_stat(0x8b)!=-1)
		idec=1;
	else
		idec=0;

	printk(KERN_INFO "PMS type is %d\n", idec);
	if(idec == 0) {
		release_region(io_port, 3);
		release_region(0x9A01, 1);
		iounmap(mem);
		return -ENODEV;
	}

	/*
	 *	Ok we have a PMS of some sort
	 */

	mvv_write(0x04, mem_base>>12);	/* Set the memory area */

	/* Ok now load the defaults */

	for(i=0;i<0x19;i++)
	{
		if(i2c_defs[i]==0xFF)
			pms_i2c_andor(0x8A, i, 0x07,0x00);
		else
			pms_i2c_write(0x8A, i, i2c_defs[i]);
	}

	pms_i2c_write(0xB8,0x00,0x12);
	pms_i2c_write(0xB8,0x04,0x00);
	pms_i2c_write(0xB8,0x07,0x00);
	pms_i2c_write(0xB8,0x08,0x00);
	pms_i2c_write(0xB8,0x09,0xFF);
	pms_i2c_write(0xB8,0x0A,0x00);
	pms_i2c_write(0xB8,0x0B,0x10);
	pms_i2c_write(0xB8,0x10,0x03);

	mvv_write(0x01, 0x00);
	mvv_write(0x05, 0xA0);
	mvv_write(0x08, 0x25);
	mvv_write(0x09, 0x00);
	mvv_write(0x0A, 0x20|MVVMEMORYWIDTH);

	mvv_write(0x10, 0x02);
	mvv_write(0x1E, 0x0C);
	mvv_write(0x1F, 0x03);
	mvv_write(0x26, 0x06);

	mvv_write(0x2B, 0x00);
	mvv_write(0x2C, 0x20);
	mvv_write(0x2D, 0x00);
	mvv_write(0x2F, 0x70);
	mvv_write(0x32, 0x00);
	mvv_write(0x33, MVVMEMORYWIDTH);
	mvv_write(0x34, 0x00);
	mvv_write(0x35, 0x00);
	mvv_write(0x3A, 0x80);
	mvv_write(0x3B, 0x10);
	mvv_write(0x20, 0x00);
	mvv_write(0x21, 0x00);
	mvv_write(0x30, 0x22);
	return 0;
}

/*
 *	Initialization and module stuff
 */

static int __init init_pms_cards(void)
{
	printk(KERN_INFO "Mediavision Pro Movie Studio driver 0.02\n");

	data_port = io_port +1;

	if(init_mediavision())
	{
		printk(KERN_INFO "Board not found.\n");
		return -ENODEV;
	}
	memcpy(&pms_device, &pms_template, sizeof(pms_template));
	mutex_init(&pms_device.lock);
	pms_device.height=240;
	pms_device.width=320;
	pms_swsense(75);
	pms_resolution(320,240);
	return video_register_device((struct video_device *)&pms_device, VFL_TYPE_GRABBER, video_nr);
}

module_param(io_port, int, 0);
module_param(mem_base, int, 0);
module_param(video_nr, int, 0);
MODULE_LICENSE("GPL");


static void __exit shutdown_mediavision(void)
{
	release_region(io_port,3);
	release_region(0x9A01, 1);
}

static void __exit cleanup_pms_module(void)
{
	shutdown_mediavision();
	video_unregister_device((struct video_device *)&pms_device);
	iounmap(mem);
}

module_init(init_pms_cards);
module_exit(cleanup_pms_module);