aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/zr364xx.c
blob: 1fdbb46de7f3ed94760b3dce16c963909b25e285 (plain) (blame)
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
/*
 * Zoran 364xx based USB webcam module version 0.72
 *
 * Allows you to use your USB webcam with V4L2 applications
 * This is still in heavy developpement !
 *
 * Copyright (C) 2004  Antoine Jacquet <royale@zerezo.com>
 * http://royale.zerezo.com/zr364xx/
 *
 * Heavily inspired by usb-skeleton.c, vicam.c, cpia.c and spca50x.c drivers
 * V4L2 version inspired by meye.c driver
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include <linux/version.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/highmem.h>
#include <media/v4l2-common.h>


/* Version Information */
#define DRIVER_VERSION "v0.72"
#define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"
#define DRIVER_DESC "Zoran 364xx"


/* Camera */
#define FRAMES 2
#define MAX_FRAME_SIZE 100000
#define BUFFER_SIZE 0x1000
#define CTRL_TIMEOUT 500


/* Debug macro */
#define DBG(x...) if (debug) info(x)


/* Init methods, need to find nicer names for these
 * the exact names of the chipsets would be the best if someone finds it */
#define METHOD0 0
#define METHOD1 1
#define METHOD2 2


/* Module parameters */
static int debug = 0;
static int mode = 0;


/* Module parameters interface */
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level");
module_param(mode, int, 0644);
MODULE_PARM_DESC(mode, "0 = 320x240, 1 = 160x120, 2 = 640x480");


/* Devices supported by this driver
 * .driver_info contains the init method used by the camera */
static struct usb_device_id device_table[] = {
	{USB_DEVICE(0x08ca, 0x0109), .driver_info = METHOD0 },
	{USB_DEVICE(0x041e, 0x4024), .driver_info = METHOD0 },
	{USB_DEVICE(0x0d64, 0x0108), .driver_info = METHOD0 },
	{USB_DEVICE(0x0546, 0x3187), .driver_info = METHOD0 },
	{USB_DEVICE(0x0d64, 0x3108), .driver_info = METHOD0 },
	{USB_DEVICE(0x0595, 0x4343), .driver_info = METHOD0 },
	{USB_DEVICE(0x0bb0, 0x500d), .driver_info = METHOD0 },
	{USB_DEVICE(0x0feb, 0x2004), .driver_info = METHOD0 },
	{USB_DEVICE(0x055f, 0xb500), .driver_info = METHOD0 },
	{USB_DEVICE(0x08ca, 0x2062), .driver_info = METHOD2 },
	{USB_DEVICE(0x052b, 0x1a18), .driver_info = METHOD1 },
	{USB_DEVICE(0x04c8, 0x0729), .driver_info = METHOD0 },
	{USB_DEVICE(0x04f2, 0xa208), .driver_info = METHOD0 },
	{USB_DEVICE(0x0784, 0x0040), .driver_info = METHOD1 },
	{USB_DEVICE(0x06d6, 0x0034), .driver_info = METHOD0 },
	{USB_DEVICE(0x0a17, 0x0062), .driver_info = METHOD2 },
	{USB_DEVICE(0x06d6, 0x003b), .driver_info = METHOD0 },
	{}			/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, device_table);


/* Camera stuff */
struct zr364xx_camera {
	struct usb_device *udev;	/* save off the usb device pointer */
	struct usb_interface *interface;/* the interface for this device */
	struct video_device *vdev;	/* v4l video device */
	u8 *framebuf;
	int nb;
	unsigned char *buffer;
	int skip;
	int brightness;
	int width;
	int height;
	int method;
	struct mutex lock;
};


/* function used to send initialisation commands to the camera */
static int send_control_msg(struct usb_device *udev, u8 request, u16 value,
			    u16 index, unsigned char *cp, u16 size)
{
	int status;

	unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
	if (!transfer_buffer) {
		info("kmalloc(%d) failed", size);
		return -ENOMEM;
	}

	memcpy(transfer_buffer, cp, size);

	status = usb_control_msg(udev,
				 usb_sndctrlpipe(udev, 0),
				 request,
				 USB_DIR_OUT | USB_TYPE_VENDOR |
				 USB_RECIP_DEVICE, value, index,
				 transfer_buffer, size, CTRL_TIMEOUT);

	kfree(transfer_buffer);

	if (status < 0)
		info("Failed sending control message, error %d.", status);

	return status;
}


/* Control messages sent to the camera to initialize it
 * and launch the capture */
typedef struct {
	unsigned int value;
	unsigned int size;
	unsigned char *bytes;
} message;

/* method 0 */
static unsigned char m0d1[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
static unsigned char m0d2[] = { 0, 0, 0, 0, 0, 0 };
static unsigned char m0d3[] = { 0, 0 };
static message m0[] = {
	{0x1f30, 0, NULL},
	{0xd000, 0, NULL},
	{0x3370, sizeof(m0d1), m0d1},
	{0x2000, 0, NULL},
	{0x2f0f, 0, NULL},
	{0x2610, sizeof(m0d2), m0d2},
	{0xe107, 0, NULL},
	{0x2502, 0, NULL},
	{0x1f70, 0, NULL},
	{0xd000, 0, NULL},
	{0x9a01, sizeof(m0d3), m0d3},
	{-1, -1, NULL}
};

/* method 1 */
static unsigned char m1d1[] = { 0xff, 0xff };
static unsigned char m1d2[] = { 0x00, 0x00 };
static message m1[] = {
	{0x1f30, 0, NULL},
	{0xd000, 0, NULL},
	{0xf000, 0, NULL},
	{0x2000, 0, NULL},
	{0x2f0f, 0, NULL},
	{0x2650, 0, NULL},
	{0xe107, 0, NULL},
	{0x2502, sizeof(m1d1), m1d1},
	{0x1f70, 0, NULL},
	{0xd000, 0, NULL},
	{0xd000, 0, NULL},
	{0xd000, 0, NULL},
	{0x9a01, sizeof(m1d2), m1d2},
	{-1, -1, NULL}
};

/* method 2 */
static unsigned char m2d1[] = { 0xff, 0xff };
static message m2[] = {
	{0x1f30, 0, NULL},
	{0xf000, 0, NULL},
	{0x2000, 0, NULL},
	{0x2f0f, 0, NULL},
	{0x2650, 0, NULL},
	{0xe107, 0, NULL},
	{0x2502, sizeof(m2d1), m2d1},
	{0x1f70, 0, NULL},
	{-1, -1, NULL}
};

/* init table */
static message *init[3] = { m0, m1, m2 };


/* JPEG static data in header (Huffman table, etc) */
static unsigned char header1[] = {
	0xFF, 0xD8,
	/*
	0xFF, 0xE0, 0x00, 0x10, 'J', 'F', 'I', 'F',
	0x00, 0x01, 0x01, 0x00, 0x33, 0x8A, 0x00, 0x00, 0x33, 0x88,
	*/
	0xFF, 0xDB, 0x00, 0x84
};
static unsigned char header2[] = {
	0xFF, 0xC4, 0x00, 0x1F, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01,
	0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
	0xFF, 0xC4, 0x00, 0xB5, 0x10, 0x00, 0x02, 0x01, 0x03, 0x03, 0x02,
	0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7D, 0x01,
	0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06,
	0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
	0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24, 0x33,
	0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x25,
	0x26, 0x27, 0x28, 0x29, 0x2A, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
	0x3A, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54,
	0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67,
	0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A,
	0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94,
	0x95, 0x96, 0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6,
	0xA7, 0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
	0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA,
	0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE1, 0xE2,
	0xE3, 0xE4, 0xE5, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3,
	0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFF, 0xC4, 0x00, 0x1F,
	0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
	0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04,
	0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0xFF, 0xC4, 0x00, 0xB5,
	0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05,
	0x04, 0x04, 0x00, 0x01, 0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11,
	0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
	0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xA1, 0xB1, 0xC1,
	0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62, 0x72, 0xD1, 0x0A, 0x16,
	0x24, 0x34, 0xE1, 0x25, 0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27,
	0x28, 0x29, 0x2A, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
	0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56, 0x57,
	0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
	0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x82, 0x83, 0x84,
	0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96,
	0x97, 0x98, 0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
	0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9, 0xBA,
	0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xD2, 0xD3,
	0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5,
	0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
	0xF8, 0xF9, 0xFA, 0xFF, 0xC0, 0x00, 0x11, 0x08, 0x00, 0xF0, 0x01,
	0x40, 0x03, 0x01, 0x21, 0x00, 0x02, 0x11, 0x01, 0x03, 0x11, 0x01,
	0xFF, 0xDA, 0x00, 0x0C, 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11,
	0x00, 0x3F, 0x00
};
static unsigned char header3;



/********************/
/* V4L2 integration */
/********************/

/* this function reads a full JPEG picture synchronously
 * TODO: do it asynchronously... */
static int read_frame(struct zr364xx_camera *cam, int framenum)
{
	int i, n, temp, head, size, actual_length;
	unsigned char *ptr = NULL, *jpeg;

      redo:
	/* hardware brightness */
	n = send_control_msg(cam->udev, 1, 0x2001, 0, NULL, 0);
	temp = (0x60 << 8) + 127 - cam->brightness;
	n = send_control_msg(cam->udev, 1, temp, 0, NULL, 0);

	/* during the first loop we are going to insert JPEG header */
	head = 0;
	/* this is the place in memory where we are going to build
	 * the JPEG image */
	jpeg = cam->framebuf + framenum * MAX_FRAME_SIZE;
	/* read data... */
	do {
		n = usb_bulk_msg(cam->udev,
				 usb_rcvbulkpipe(cam->udev, 0x81),
				 cam->buffer, BUFFER_SIZE, &actual_length,
				 CTRL_TIMEOUT);
		DBG("buffer : %d %d", cam->buffer[0], cam->buffer[1]);
		DBG("bulk : n=%d size=%d", n, actual_length);
		if (n < 0) {
			info("error reading bulk msg");
			return 0;
		}
		if (actual_length < 0 || actual_length > BUFFER_SIZE) {
			info("wrong number of bytes");
			return 0;
		}

		/* swap bytes if camera needs it */
		if (cam->method == METHOD0) {
			u16 *buf = (u16*)cam->buffer;
			for (i = 0; i < BUFFER_SIZE/2; i++)
				swab16s(buf + i);
		}

		/* write the JPEG header */
		if (!head) {
			DBG("jpeg header");
			ptr = jpeg;
			memcpy(ptr, header1, sizeof(header1));
			ptr += sizeof(header1);
			header3 = 0;
			memcpy(ptr, &header3, 1);
			ptr++;
			memcpy(ptr, cam->buffer, 64);
			ptr += 64;
			header3 = 1;
			memcpy(ptr, &header3, 1);
			ptr++;
			memcpy(ptr, cam->buffer + 64, 64);
			ptr += 64;
			memcpy(ptr, header2, sizeof(header2));
			ptr += sizeof(header2);
			memcpy(ptr, cam->buffer + 128,
			       actual_length - 128);
			ptr += actual_length - 128;
			head = 1;
			DBG("header : %d %d %d %d %d %d %d %d %d",
			    cam->buffer[0], cam->buffer[1], cam->buffer[2],
			    cam->buffer[3], cam->buffer[4], cam->buffer[5],
			    cam->buffer[6], cam->buffer[7], cam->buffer[8]);
		} else {
			memcpy(ptr, cam->buffer, actual_length);
			ptr += actual_length;
		}
	}
	/* ... until there is no more */
	while (actual_length == BUFFER_SIZE);

	/* we skip the 2 first frames which are usually buggy */
	if (cam->skip) {
		cam->skip--;
		goto redo;
	}

	/* go back to find the JPEG EOI marker */
	size = ptr - jpeg;
	ptr -= 2;
	while (ptr > jpeg) {
		if (*ptr == 0xFF && *(ptr + 1) == 0xD9
		    && *(ptr + 2) == 0xFF)
			break;
		ptr--;
	}
	if (ptr == jpeg)
		DBG("No EOI marker");

	/* Sometimes there is junk data in the middle of the picture,
	 * we want to skip this bogus frames */
	while (ptr > jpeg) {
		if (*ptr == 0xFF && *(ptr + 1) == 0xFF
		    && *(ptr + 2) == 0xFF)
			break;
		ptr--;
	}
	if (ptr != jpeg) {
		DBG("Bogus frame ? %d", cam->nb);
		goto redo;
	}

	DBG("jpeg : %d %d %d %d %d %d %d %d",
	    jpeg[0], jpeg[1], jpeg[2], jpeg[3],
	    jpeg[4], jpeg[5], jpeg[6], jpeg[7]);

	return size;
}


static ssize_t zr364xx_read(struct file *file, char *buf, size_t cnt,
			    loff_t * ppos)
{
	unsigned long count = cnt;
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	DBG("zr364xx_read: read %d bytes.", (int) count);

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	if (!buf)
		return -EINVAL;

	if (!count)
		return -EINVAL;

	/* NoMan Sux ! */
	count = read_frame(cam, 0);

	if (copy_to_user(buf, cam->framebuf, count))
		return -EFAULT;

	return count;
}


static int zr364xx_vidioc_querycap(struct file *file, void *priv,
				   struct v4l2_capability *cap)
{
	memset(cap, 0, sizeof(*cap));
	strcpy(cap->driver, DRIVER_DESC);
	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE;
	return 0;
}

static int zr364xx_vidioc_enum_input(struct file *file, void *priv,
				     struct v4l2_input *i)
{
	if (i->index != 0)
		return -EINVAL;
	memset(i, 0, sizeof(*i));
	i->index = 0;
	strcpy(i->name, DRIVER_DESC " Camera");
	i->type = V4L2_INPUT_TYPE_CAMERA;
	return 0;
}

static int zr364xx_vidioc_g_input(struct file *file, void *priv,
				  unsigned int *i)
{
	*i = 0;
	return 0;
}

static int zr364xx_vidioc_s_input(struct file *file, void *priv,
				  unsigned int i)
{
	if (i != 0)
		return -EINVAL;
	return 0;
}

static int zr364xx_vidioc_queryctrl(struct file *file, void *priv,
				    struct v4l2_queryctrl *c)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	switch (c->id) {
	case V4L2_CID_BRIGHTNESS:
		c->type = V4L2_CTRL_TYPE_INTEGER;
		strcpy(c->name, "Brightness");
		c->minimum = 0;
		c->maximum = 127;
		c->step = 1;
		c->default_value = cam->brightness;
		c->flags = 0;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int zr364xx_vidioc_s_ctrl(struct file *file, void *priv,
				 struct v4l2_control *c)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	switch (c->id) {
	case V4L2_CID_BRIGHTNESS:
		cam->brightness = c->value;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int zr364xx_vidioc_g_ctrl(struct file *file, void *priv,
				 struct v4l2_control *c)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	switch (c->id) {
	case V4L2_CID_BRIGHTNESS:
		c->value = cam->brightness;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int zr364xx_vidioc_enum_fmt_cap(struct file *file,
				       void *priv, struct v4l2_fmtdesc *f)
{
	if (f->index > 0)
		return -EINVAL;
	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	memset(f, 0, sizeof(*f));
	f->index = 0;
	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	f->flags = V4L2_FMT_FLAG_COMPRESSED;
	strcpy(f->description, "JPEG");
	f->pixelformat = V4L2_PIX_FMT_JPEG;
	return 0;
}

static int zr364xx_vidioc_try_fmt_cap(struct file *file, void *priv,
				      struct v4l2_format *f)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
		return -EINVAL;
	if (f->fmt.pix.field != V4L2_FIELD_ANY &&
	    f->fmt.pix.field != V4L2_FIELD_NONE)
		return -EINVAL;
	f->fmt.pix.field = V4L2_FIELD_NONE;
	f->fmt.pix.width = cam->width;
	f->fmt.pix.height = cam->height;
	f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = 0;
	f->fmt.pix.priv = 0;
	return 0;
}

static int zr364xx_vidioc_g_fmt_cap(struct file *file, void *priv,
				    struct v4l2_format *f)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	memset(&f->fmt.pix, 0, sizeof(struct v4l2_pix_format));
	f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	f->fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG;
	f->fmt.pix.field = V4L2_FIELD_NONE;
	f->fmt.pix.width = cam->width;
	f->fmt.pix.height = cam->height;
	f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = 0;
	f->fmt.pix.priv = 0;
	return 0;
}

static int zr364xx_vidioc_s_fmt_cap(struct file *file, void *priv,
				    struct v4l2_format *f)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
		return -EINVAL;
	if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG)
		return -EINVAL;
	if (f->fmt.pix.field != V4L2_FIELD_ANY &&
	    f->fmt.pix.field != V4L2_FIELD_NONE)
		return -EINVAL;
	f->fmt.pix.field = V4L2_FIELD_NONE;
	f->fmt.pix.width = cam->width;
	f->fmt.pix.height = cam->height;
	f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
	f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
	f->fmt.pix.colorspace = 0;
	f->fmt.pix.priv = 0;
	DBG("ok!");
	return 0;
}

static int zr364xx_vidioc_streamon(struct file *file, void *priv,
				   enum v4l2_buf_type type)
{
	return 0;
}

static int zr364xx_vidioc_streamoff(struct file *file, void *priv,
				    enum v4l2_buf_type type)
{
	return 0;
}


/* open the camera */
static int zr364xx_open(struct inode *inode, struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam = video_get_drvdata(vdev);
	struct usb_device *udev = cam->udev;
	int i, err;

	DBG("zr364xx_open");

	cam->skip = 2;

	err = video_exclusive_open(inode, file);
	if (err < 0)
		return err;

	if (!cam->framebuf) {
		cam->framebuf = vmalloc_32(MAX_FRAME_SIZE * FRAMES);
		if (!cam->framebuf) {
			info("vmalloc_32 failed!");
			return -ENOMEM;
		}
	}

	mutex_lock(&cam->lock);
	for (i = 0; init[cam->method][i].size != -1; i++) {
		err =
		    send_control_msg(udev, 1, init[cam->method][i].value,
				     0, init[cam->method][i].bytes,
				     init[cam->method][i].size);
		if (err < 0) {
			info("error during open sequence: %d", i);
			mutex_unlock(&cam->lock);
			return err;
		}
	}

	file->private_data = vdev;

	/* Added some delay here, since opening/closing the camera quickly,
	 * like Ekiga does during its startup, can crash the webcam
	 */
	mdelay(100);

	mutex_unlock(&cam->lock);
	return 0;
}


/* release the camera */
static int zr364xx_release(struct inode *inode, struct file *file)
{
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;
	struct usb_device *udev;
	int i, err;

	DBG("zr364xx_release");

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	udev = cam->udev;

	mutex_lock(&cam->lock);
	for (i = 0; i < 2; i++) {
		err =
		    send_control_msg(udev, 1, init[cam->method][i].value,
				     0, init[i][cam->method].bytes,
				     init[cam->method][i].size);
		if (err < 0) {
			info("error during release sequence");
			mutex_unlock(&cam->lock);
			return err;
		}
	}

	file->private_data = NULL;
	video_exclusive_release(inode, file);

	/* Added some delay here, since opening/closing the camera quickly,
	 * like Ekiga does during its startup, can crash the webcam
	 */
	mdelay(100);

	mutex_unlock(&cam->lock);
	return 0;
}


static int zr364xx_mmap(struct file *file, struct vm_area_struct *vma)
{
	void *pos;
	unsigned long start = vma->vm_start;
	unsigned long size = vma->vm_end - vma->vm_start;
	struct video_device *vdev = video_devdata(file);
	struct zr364xx_camera *cam;

	DBG("zr364xx_mmap: %ld\n", size);

	if (vdev == NULL)
		return -ENODEV;
	cam = video_get_drvdata(vdev);

	pos = cam->framebuf;
	while (size > 0) {
		if (vm_insert_page(vma, start, vmalloc_to_page(pos)))
			return -EAGAIN;
		start += PAGE_SIZE;
		pos += PAGE_SIZE;
		if (size > PAGE_SIZE)
			size -= PAGE_SIZE;
		else
			size = 0;
	}

	return 0;
}


static const struct file_operations zr364xx_fops = {
	.owner = THIS_MODULE,
	.open = zr364xx_open,
	.release = zr364xx_release,
	.read = zr364xx_read,
	.mmap = zr364xx_mmap,
	.ioctl = video_ioctl2,
	.llseek = no_llseek,
};

static struct video_device zr364xx_template = {
	.owner = THIS_MODULE,
	.name = DRIVER_DESC,
	.type = VID_TYPE_CAPTURE,
	.fops = &zr364xx_fops,
	.release = video_device_release,
	.minor = -1,

	.vidioc_querycap	= zr364xx_vidioc_querycap,
	.vidioc_enum_fmt_cap	= zr364xx_vidioc_enum_fmt_cap,
	.vidioc_try_fmt_cap	= zr364xx_vidioc_try_fmt_cap,
	.vidioc_s_fmt_cap	= zr364xx_vidioc_s_fmt_cap,
	.vidioc_g_fmt_cap	= zr364xx_vidioc_g_fmt_cap,
	.vidioc_enum_input	= zr364xx_vidioc_enum_input,
	.vidioc_g_input		= zr364xx_vidioc_g_input,
	.vidioc_s_input		= zr364xx_vidioc_s_input,
	.vidioc_streamon	= zr364xx_vidioc_streamon,
	.vidioc_streamoff	= zr364xx_vidioc_streamoff,
	.vidioc_queryctrl	= zr364xx_vidioc_queryctrl,
	.vidioc_g_ctrl		= zr364xx_vidioc_g_ctrl,
	.vidioc_s_ctrl		= zr364xx_vidioc_s_ctrl,
};



/*******************/
/* USB integration */
/*******************/

static int zr364xx_probe(struct usb_interface *intf,
			 const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct zr364xx_camera *cam = NULL;
	int err;

	DBG("probing...");

	info(DRIVER_DESC " compatible webcam plugged");
	info("model %04x:%04x detected", udev->descriptor.idVendor,
	     udev->descriptor.idProduct);

	cam = kzalloc(sizeof(struct zr364xx_camera), GFP_KERNEL);
	if (cam == NULL) {
		info("cam: out of memory !");
		return -ENOMEM;
	}
	/* save the init method used by this camera */
	cam->method = id->driver_info;

	cam->vdev = video_device_alloc();
	if (cam->vdev == NULL) {
		info("cam->vdev: out of memory !");
		kfree(cam);
		return -ENOMEM;
	}
	memcpy(cam->vdev, &zr364xx_template, sizeof(zr364xx_template));
	video_set_drvdata(cam->vdev, cam);
	if (debug)
		cam->vdev->debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;

	cam->udev = udev;

	if ((cam->buffer = kmalloc(BUFFER_SIZE, GFP_KERNEL)) == NULL) {
		info("cam->buffer: out of memory !");
		video_device_release(cam->vdev);
		kfree(cam);
		return -ENODEV;
	}

	switch (mode) {
	case 1:
		info("160x120 mode selected");
		cam->width = 160;
		cam->height = 120;
		break;
	case 2:
		info("640x480 mode selected");
		cam->width = 640;
		cam->height = 480;
		break;
	default:
		info("320x240 mode selected");
		cam->width = 320;
		cam->height = 240;
		break;
	}

	m0d1[0] = mode;
	m1[2].value = 0xf000 + mode;
	m2[1].value = 0xf000 + mode;
	header2[437] = cam->height / 256;
	header2[438] = cam->height % 256;
	header2[439] = cam->width / 256;
	header2[440] = cam->width % 256;

	cam->nb = 0;
	cam->brightness = 64;
	mutex_init(&cam->lock);

	err = video_register_device(cam->vdev, VFL_TYPE_GRABBER, -1);
	if (err) {
		info("video_register_device failed");
		video_device_release(cam->vdev);
		kfree(cam->buffer);
		kfree(cam);
		return err;
	}

	usb_set_intfdata(intf, cam);

	info(DRIVER_DESC " controlling video device %d", cam->vdev->minor);
	return 0;
}


static void zr364xx_disconnect(struct usb_interface *intf)
{
	struct zr364xx_camera *cam = usb_get_intfdata(intf);
	usb_set_intfdata(intf, NULL);
	dev_set_drvdata(&intf->dev, NULL);
	info(DRIVER_DESC " webcam unplugged");
	if (cam->vdev)
		video_unregister_device(cam->vdev);
	cam->vdev = NULL;
	kfree(cam->buffer);
	if (cam->framebuf)
		vfree(cam->framebuf);
	kfree(cam);
}



/**********************/
/* Module integration */
/**********************/

static struct usb_driver zr364xx_driver = {
	.name = "zr364xx",
	.probe = zr364xx_probe,
	.disconnect = zr364xx_disconnect,
	.id_table = device_table
};


static int __init zr364xx_init(void)
{
	int retval;
	retval = usb_register(&zr364xx_driver);
	if (retval)
		info("usb_register failed!");
	else
		info(DRIVER_DESC " module loaded");
	return retval;
}


static void __exit zr364xx_exit(void)
{
	info(DRIVER_DESC " module unloaded");
	usb_deregister(&zr364xx_driver);
}


module_init(zr364xx_init);
module_exit(zr364xx_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");