aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/usbvideo/konicawc.c
blob: a0addcb04295078d758ae95dcf96320b8d1d2fad (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
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
/*
 * konicawc.c - konica webcam driver
 *
 * Author: Simon Evans <spse@secret.org.uk>
 *
 * Copyright (C) 2002 Simon Evans
 *
 * Licence: GPL
 *
 * Driver for USB webcams based on Konica chipset. This
 * chipset is used in Intel YC76 camera.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb/input.h>

#include "usbvideo.h"

#define MAX_BRIGHTNESS	108
#define MAX_CONTRAST	108
#define MAX_SATURATION	108
#define MAX_SHARPNESS	108
#define MAX_WHITEBAL	372
#define MAX_SPEED	6


#define MAX_CAMERAS	1

#define DRIVER_VERSION	"v1.4"
#define DRIVER_DESC	"Konica Webcam driver"

enum ctrl_req {
	SetWhitebal	= 0x01,
	SetBrightness	= 0x02,
	SetSharpness	= 0x03,
	SetContrast	= 0x04,
	SetSaturation	= 0x05,
};


enum frame_sizes {
	SIZE_160X120	= 0,
	SIZE_160X136	= 1,
	SIZE_176X144	= 2,
	SIZE_320X240	= 3,

};

#define MAX_FRAME_SIZE	SIZE_320X240

static struct usbvideo *cams;

#ifdef CONFIG_USB_DEBUG
static int debug;
#define DEBUG(n, format, arg...) \
	if (n <= debug) {	 \
		printk(KERN_DEBUG __FILE__ ":%s(): " format "\n", __func__ , ## arg); \
	}
#else
#define DEBUG(n, arg...)
static const int debug;
#endif


/* Some default values for initial camera settings,
   can be set by modprobe */

static int size;
static int speed = 6;		/* Speed (fps) 0 (slowest) to 6 (fastest) */
static int brightness =	MAX_BRIGHTNESS/2;
static int contrast =	MAX_CONTRAST/2;
static int saturation =	MAX_SATURATION/2;
static int sharpness =	MAX_SHARPNESS/2;
static int whitebal =	3*(MAX_WHITEBAL/4);

static const int spd_to_iface[] = { 1, 0, 3, 2, 4, 5, 6 };

/* These FPS speeds are from the windows config box. They are
 * indexed on size (0-2) and speed (0-6). Divide by 3 to get the
 * real fps.
 */

static const int spd_to_fps[][7] = { { 24, 40, 48, 60, 72, 80, 100 },
			       { 24, 40, 48, 60, 72, 80, 100 },
			       { 18, 30, 36, 45, 54, 60, 75  },
			       { 6,  10, 12, 15, 18, 21, 25  } };

struct cam_size {
	u16	width;
	u16	height;
	u8	cmd;
};

static const struct cam_size camera_sizes[] = { { 160, 120, 0x7 },
					  { 160, 136, 0xa },
					  { 176, 144, 0x4 },
					  { 320, 240, 0x5 } };

struct konicawc {
	u8 brightness;		/* camera uses 0 - 9, x11 for real value */
	u8 contrast;		/* as above */
	u8 saturation;		/* as above */
	u8 sharpness;		/* as above */
	u8 white_bal;		/* 0 - 33, x11 for real value */
	u8 speed;		/* Stored as 0 - 6, used as index in spd_to_* (above) */
	u8 size;		/* Frame Size */
	int height;
	int width;
	struct urb *sts_urb[USBVIDEO_NUMSBUF];
	u8 sts_buf[USBVIDEO_NUMSBUF][FRAMES_PER_DESC];
	struct urb *last_data_urb;
	int lastframe;
	int cur_frame_size;	/* number of bytes in current frame size */
	int maxline;		/* number of lines per frame */
	int yplanesz;		/* Number of bytes in the Y plane */
	unsigned int buttonsts:1;
#ifdef CONFIG_INPUT
	struct input_dev *input;
	char input_physname[64];
#endif
};


#define konicawc_set_misc(uvd, req, value, index)		konicawc_ctrl_msg(uvd, USB_DIR_OUT, req, value, index, NULL, 0)
#define konicawc_get_misc(uvd, req, value, index, buf, sz)	konicawc_ctrl_msg(uvd, USB_DIR_IN, req, value, index, buf, sz)
#define konicawc_set_value(uvd, value, index)			konicawc_ctrl_msg(uvd, USB_DIR_OUT, 2, value, index, NULL, 0)


static int konicawc_ctrl_msg(struct uvd *uvd, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
{
	int retval = usb_control_msg(uvd->dev,
		dir ? usb_rcvctrlpipe(uvd->dev, 0) : usb_sndctrlpipe(uvd->dev, 0),
		    request, 0x40 | dir, value, index, buf, len, 1000);
	return retval < 0 ? retval : 0;
}


static inline void konicawc_camera_on(struct uvd *uvd)
{
	DEBUG(0, "camera on");
	konicawc_set_misc(uvd, 0x2, 1, 0x0b);
}


static inline void konicawc_camera_off(struct uvd *uvd)
{
	DEBUG(0, "camera off");
	konicawc_set_misc(uvd, 0x2, 0, 0x0b);
}


static void konicawc_set_camera_size(struct uvd *uvd)
{
	struct konicawc *cam = (struct konicawc *)uvd->user_data;

	konicawc_set_misc(uvd, 0x2, camera_sizes[cam->size].cmd, 0x08);
	cam->width = camera_sizes[cam->size].width;
	cam->height = camera_sizes[cam->size].height;
	cam->yplanesz = cam->height * cam->width;
	cam->cur_frame_size = (cam->yplanesz * 3) / 2;
	cam->maxline = cam->yplanesz / 256;
	uvd->videosize = VIDEOSIZE(cam->width, cam->height);
}


static int konicawc_setup_on_open(struct uvd *uvd)
{
	struct konicawc *cam = (struct konicawc *)uvd->user_data;

	DEBUG(1, "setting brightness to %d (%d)", cam->brightness,
	    cam->brightness * 11);
	konicawc_set_value(uvd, cam->brightness, SetBrightness);
	DEBUG(1, "setting white balance to %d (%d)", cam->white_bal,
	    cam->white_bal * 11);
	konicawc_set_value(uvd, cam->white_bal, SetWhitebal);
	DEBUG(1, "setting contrast to %d (%d)", cam->contrast,
	    cam->contrast * 11);
	konicawc_set_value(uvd, cam->contrast, SetContrast);
	DEBUG(1, "setting saturation to %d (%d)", cam->saturation,
	    cam->saturation * 11);
	konicawc_set_value(uvd, cam->saturation, SetSaturation);
	DEBUG(1, "setting sharpness to %d (%d)", cam->sharpness,
	    cam->sharpness * 11);
	konicawc_set_value(uvd, cam->sharpness, SetSharpness);
	konicawc_set_camera_size(uvd);
	cam->lastframe = -2;
	cam->buttonsts = 0;
	return 0;
}


static void konicawc_adjust_picture(struct uvd *uvd)
{
	struct konicawc *cam = (struct konicawc *)uvd->user_data;

	konicawc_camera_off(uvd);
	DEBUG(1, "new brightness: %d", uvd->vpic.brightness);
	uvd->vpic.brightness = (uvd->vpic.brightness > MAX_BRIGHTNESS) ? MAX_BRIGHTNESS : uvd->vpic.brightness;
	if(cam->brightness != uvd->vpic.brightness / 11) {
	   cam->brightness = uvd->vpic.brightness / 11;
	   DEBUG(1, "setting brightness to %d (%d)", cam->brightness,
	       cam->brightness * 11);
	   konicawc_set_value(uvd, cam->brightness, SetBrightness);
	}

	DEBUG(1, "new contrast: %d", uvd->vpic.contrast);
	uvd->vpic.contrast = (uvd->vpic.contrast > MAX_CONTRAST) ? MAX_CONTRAST : uvd->vpic.contrast;
	if(cam->contrast != uvd->vpic.contrast / 11) {
		cam->contrast = uvd->vpic.contrast / 11;
		DEBUG(1, "setting contrast to %d (%d)", cam->contrast,
		    cam->contrast * 11);
		konicawc_set_value(uvd, cam->contrast, SetContrast);
	}
	konicawc_camera_on(uvd);
}

#ifdef CONFIG_INPUT

static void konicawc_register_input(struct konicawc *cam, struct usb_device *dev)
{
	struct input_dev *input_dev;
	int error;

	usb_make_path(dev, cam->input_physname, sizeof(cam->input_physname));
	strlcat(cam->input_physname, "/input0", sizeof(cam->input_physname));

	cam->input = input_dev = input_allocate_device();
	if (!input_dev) {
		dev_warn(&dev->dev,
			 "Not enough memory for camera's input device\n");
		return;
	}

	input_dev->name = "Konicawc snapshot button";
	input_dev->phys = cam->input_physname;
	usb_to_input_id(dev, &input_dev->id);
	input_dev->dev.parent = &dev->dev;

	input_dev->evbit[0] = BIT_MASK(EV_KEY);
	input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);

	error = input_register_device(cam->input);
	if (error) {
		dev_warn(&dev->dev,
			 "Failed to register camera's input device, err: %d\n",
			 error);
		input_free_device(cam->input);
		cam->input = NULL;
	}
}

static void konicawc_unregister_input(struct konicawc *cam)
{
	if (cam->input) {
		input_unregister_device(cam->input);
		cam->input = NULL;
	}
}

static void konicawc_report_buttonstat(struct konicawc *cam)
{
	if (cam->input) {
		input_report_key(cam->input, KEY_CAMERA, cam->buttonsts);
		input_sync(cam->input);
	}
}

#else

static inline void konicawc_register_input(struct konicawc *cam, struct usb_device *dev) { }
static inline void konicawc_unregister_input(struct konicawc *cam) { }
static inline void konicawc_report_buttonstat(struct konicawc *cam) { }

#endif /* CONFIG_INPUT */

static int konicawc_compress_iso(struct uvd *uvd, struct urb *dataurb, struct urb *stsurb)
{
	char *cdata;
	int i, totlen = 0;
	unsigned char *status = stsurb->transfer_buffer;
	int keep = 0, discard = 0, bad = 0;
	struct konicawc *cam = (struct konicawc *)uvd->user_data;

	for (i = 0; i < dataurb->number_of_packets; i++) {
		int button = cam->buttonsts;
		unsigned char sts;
		int n = dataurb->iso_frame_desc[i].actual_length;
		int st = dataurb->iso_frame_desc[i].status;
		cdata = dataurb->transfer_buffer +
			dataurb->iso_frame_desc[i].offset;

		/* Detect and ignore errored packets */
		if (st < 0) {
			DEBUG(1, "Data error: packet=%d. len=%d. status=%d.",
			      i, n, st);
			uvd->stats.iso_err_count++;
			continue;
		}

		/* Detect and ignore empty packets */
		if (n <= 0) {
			uvd->stats.iso_skip_count++;
			continue;
		}

		/* See what the status data said about the packet */
		sts = *(status+stsurb->iso_frame_desc[i].offset);

		/* sts: 0x80-0xff: frame start with frame number (ie 0-7f)
		 * otherwise:
		 * bit 0 0: keep packet
		 *	 1: drop packet (padding data)
		 *
		 * bit 4 0 button not clicked
		 *       1 button clicked
		 * button is used to `take a picture' (in software)
		 */

		if(sts < 0x80) {
			button = !!(sts & 0x40);
			sts &= ~0x40;
		}

		/* work out the button status, but don't do
		   anything with it for now */

		if(button != cam->buttonsts) {
			DEBUG(2, "button: %sclicked", button ? "" : "un");
			cam->buttonsts = button;
			konicawc_report_buttonstat(cam);
		}

		if(sts == 0x01) { /* drop frame */
			discard++;
			continue;
		}

		if((sts > 0x01) && (sts < 0x80)) {
			dev_info(&uvd->dev->dev, "unknown status %2.2x\n",
				 sts);
			bad++;
			continue;
		}
		if(!sts && cam->lastframe == -2) {
			DEBUG(2, "dropping frame looking for image start");
			continue;
		}

		keep++;
		if(sts & 0x80) { /* frame start */
			unsigned char marker[] = { 0, 0xff, 0, 0x00 };

			if(cam->lastframe == -2) {
				DEBUG(2, "found initial image");
				cam->lastframe = -1;
			}

			marker[3] = sts & 0x7F;
			RingQueue_Enqueue(&uvd->dp, marker, 4);
			totlen += 4;
		}

		totlen += n;	/* Little local accounting */
		RingQueue_Enqueue(&uvd->dp, cdata, n);
	}
	DEBUG(8, "finished: keep = %d discard = %d bad = %d added %d bytes",
		    keep, discard, bad, totlen);
	return totlen;
}


static void resubmit_urb(struct uvd *uvd, struct urb *urb)
{
	int i, ret;
	for (i = 0; i < FRAMES_PER_DESC; i++) {
		urb->iso_frame_desc[i].status = 0;
	}
	urb->dev = uvd->dev;
	urb->status = 0;
	ret = usb_submit_urb(urb, GFP_ATOMIC);
	DEBUG(3, "submitting urb of length %d", urb->transfer_buffer_length);
	if(ret)
		err("usb_submit_urb error (%d)", ret);

}


static void konicawc_isoc_irq(struct urb *urb)
{
	struct uvd *uvd = urb->context;
	struct konicawc *cam = (struct konicawc *)uvd->user_data;

	/* We don't want to do anything if we are about to be removed! */
	if (!CAMERA_IS_OPERATIONAL(uvd))
		return;

	if (!uvd->streaming) {
		DEBUG(1, "Not streaming, but interrupt!");
		return;
	}

	DEBUG(3, "got frame %d len = %d buflen =%d", urb->start_frame, urb->actual_length, urb->transfer_buffer_length);

	uvd->stats.urb_count++;

	if (urb->transfer_buffer_length > 32) {
		cam->last_data_urb = urb;
		return;
	}
	/* Copy the data received into ring queue */
	if(cam->last_data_urb) {
		int len = 0;
		if(urb->start_frame != cam->last_data_urb->start_frame)
			err("Lost sync on frames");
		else if (!urb->status && !cam->last_data_urb->status)
			len = konicawc_compress_iso(uvd, cam->last_data_urb, urb);

		resubmit_urb(uvd, cam->last_data_urb);
		resubmit_urb(uvd, urb);
		cam->last_data_urb = NULL;
		uvd->stats.urb_length = len;
		uvd->stats.data_count += len;
		if(len)
			RingQueue_WakeUpInterruptible(&uvd->dp);
		return;
	}
	return;
}


static int konicawc_start_data(struct uvd *uvd)
{
	struct usb_device *dev = uvd->dev;
	int i, errFlag;
	struct konicawc *cam = (struct konicawc *)uvd->user_data;
	int pktsz;
	struct usb_interface *intf;
	struct usb_host_interface *interface = NULL;

	intf = usb_ifnum_to_if(dev, uvd->iface);
	if (intf)
		interface = usb_altnum_to_altsetting(intf,
				spd_to_iface[cam->speed]);
	if (!interface)
		return -ENXIO;
	pktsz = le16_to_cpu(interface->endpoint[1].desc.wMaxPacketSize);
	DEBUG(1, "pktsz = %d", pktsz);
	if (!CAMERA_IS_OPERATIONAL(uvd)) {
		err("Camera is not operational");
		return -EFAULT;
	}
	uvd->curframe = -1;
	konicawc_camera_on(uvd);
	/* Alternate interface 1 is is the biggest frame size */
	i = usb_set_interface(dev, uvd->iface, uvd->ifaceAltActive);
	if (i < 0) {
		err("usb_set_interface error");
		uvd->last_error = i;
		return -EBUSY;
	}

	/* We double buffer the Iso lists */
	for (i=0; i < USBVIDEO_NUMSBUF; i++) {
		int j, k;
		struct urb *urb = uvd->sbuf[i].urb;
		urb->dev = dev;
		urb->context = uvd;
		urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp);
		urb->interval = 1;
		urb->transfer_flags = URB_ISO_ASAP;
		urb->transfer_buffer = uvd->sbuf[i].data;
		urb->complete = konicawc_isoc_irq;
		urb->number_of_packets = FRAMES_PER_DESC;
		urb->transfer_buffer_length = pktsz * FRAMES_PER_DESC;
		for (j=k=0; j < FRAMES_PER_DESC; j++, k += pktsz) {
			urb->iso_frame_desc[j].offset = k;
			urb->iso_frame_desc[j].length = pktsz;
		}

		urb = cam->sts_urb[i];
		urb->dev = dev;
		urb->context = uvd;
		urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp-1);
		urb->interval = 1;
		urb->transfer_flags = URB_ISO_ASAP;
		urb->transfer_buffer = cam->sts_buf[i];
		urb->complete = konicawc_isoc_irq;
		urb->number_of_packets = FRAMES_PER_DESC;
		urb->transfer_buffer_length = FRAMES_PER_DESC;
		for (j=0; j < FRAMES_PER_DESC; j++) {
			urb->iso_frame_desc[j].offset = j;
			urb->iso_frame_desc[j].length = 1;
		}
	}

	cam->last_data_urb = NULL;

	/* Submit all URBs */
	for (i=0; i < USBVIDEO_NUMSBUF; i++) {
		errFlag = usb_submit_urb(cam->sts_urb[i], GFP_KERNEL);
		if (errFlag)
			err("usb_submit_isoc(%d) ret %d", i, errFlag);

		errFlag = usb_submit_urb(uvd->sbuf[i].urb, GFP_KERNEL);
		if (errFlag)
			err ("usb_submit_isoc(%d) ret %d", i, errFlag);
	}

	uvd->streaming = 1;
	DEBUG(1, "streaming=1 video_endp=$%02x", uvd->video_endp);
	return 0;
}


static void konicawc_stop_data(struct uvd *uvd)
{
	int i, j;
	struct konicawc *cam;

	if ((uvd == NULL) || (!uvd->streaming) || (uvd->dev == NULL))
		return;

	konicawc_camera_off(uvd);
	uvd->streaming = 0;
	cam = (struct konicawc *)uvd->user_data;
	cam->last_data_urb = NULL;

	/* Unschedule all of the iso td's */
	for (i=0; i < USBVIDEO_NUMSBUF; i++) {
		usb_kill_urb(uvd->sbuf[i].urb);
		usb_kill_urb(cam->sts_urb[i]);
	}

	if (!uvd->remove_pending) {
		/* Set packet size to 0 */
		j = usb_set_interface(uvd->dev, uvd->iface, uvd->ifaceAltInactive);
		if (j < 0) {
			err("usb_set_interface() error %d.", j);
			uvd->last_error = j;
		}
	}
}


static void konicawc_process_isoc(struct uvd *uvd, struct usbvideo_frame *frame)
{
	struct konicawc *cam = (struct konicawc *)uvd->user_data;
	int maxline = cam->maxline;
	int yplanesz = cam->yplanesz;

	assert(frame != NULL);

	DEBUG(5, "maxline = %d yplanesz = %d", maxline, yplanesz);
	DEBUG(3, "Frame state = %d", frame->scanstate);

	if(frame->scanstate == ScanState_Scanning) {
		int drop = 0;
		int curframe;
		int fdrops = 0;
		DEBUG(3, "Searching for marker, queue len = %d", RingQueue_GetLength(&uvd->dp));
		while(RingQueue_GetLength(&uvd->dp) >= 4) {
			if ((RING_QUEUE_PEEK(&uvd->dp, 0) == 0x00) &&
			    (RING_QUEUE_PEEK(&uvd->dp, 1) == 0xff) &&
			    (RING_QUEUE_PEEK(&uvd->dp, 2) == 0x00) &&
			    (RING_QUEUE_PEEK(&uvd->dp, 3) < 0x80)) {
				curframe = RING_QUEUE_PEEK(&uvd->dp, 3);
				if(cam->lastframe >= 0) {
					fdrops = (0x80 + curframe - cam->lastframe) & 0x7F;
					fdrops--;
					if(fdrops) {
						dev_info(&uvd->dev->dev,
							 "Dropped %d frames "
							 "(%d -> %d)\n",
							 fdrops,
							 cam->lastframe,
							 curframe);
					}
				}
				cam->lastframe = curframe;
				frame->curline = 0;
				frame->scanstate = ScanState_Lines;
				RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 4);
				break;
			}
			RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 1);
			drop++;
		}
		if(drop)
			DEBUG(2, "dropped %d bytes looking for new frame", drop);
	}

	if(frame->scanstate == ScanState_Scanning)
		return;

	/* Try to move data from queue into frame buffer
	 * We get data in blocks of 384 bytes made up of:
	 * 256 Y, 64 U, 64 V.
	 * This needs to be written out as a Y plane, a U plane and a V plane.
	 */

	while ( frame->curline < maxline && (RingQueue_GetLength(&uvd->dp) >= 384)) {
		/* Y */
		RingQueue_Dequeue(&uvd->dp, frame->data + (frame->curline * 256), 256);
		/* U */
		RingQueue_Dequeue(&uvd->dp, frame->data + yplanesz + (frame->curline * 64), 64);
		/* V */
		RingQueue_Dequeue(&uvd->dp, frame->data + (5 * yplanesz)/4 + (frame->curline * 64), 64);
		frame->seqRead_Length += 384;
		frame->curline++;
	}
	/* See if we filled the frame */
	if (frame->curline == maxline) {
		DEBUG(5, "got whole frame");

		frame->frameState = FrameState_Done_Hold;
		frame->curline = 0;
		uvd->curframe = -1;
		uvd->stats.frame_num++;
	}
}


static int konicawc_find_fps(int size, int fps)
{
	int i;

	fps *= 3;
	DEBUG(1, "konica_find_fps: size = %d fps = %d", size, fps);
	if(fps <= spd_to_fps[size][0])
		return 0;

	if(fps >= spd_to_fps[size][MAX_SPEED])
		return MAX_SPEED;

	for(i = 0; i < MAX_SPEED; i++) {
		if((fps >= spd_to_fps[size][i]) && (fps <= spd_to_fps[size][i+1])) {
			DEBUG(2, "fps %d between %d and %d", fps, i, i+1);
			if( (fps - spd_to_fps[size][i]) < (spd_to_fps[size][i+1] - fps))
				return i;
			else
				return i+1;
		}
	}
	return MAX_SPEED+1;
}


static int konicawc_set_video_mode(struct uvd *uvd, struct video_window *vw)
{
	struct konicawc *cam = (struct konicawc *)uvd->user_data;
	int newspeed = cam->speed;
	int newsize;
	int x = vw->width;
	int y = vw->height;
	int fps = vw->flags;

	if(x > 0 && y > 0) {
		DEBUG(2, "trying to find size %d,%d", x, y);
		for(newsize = 0; newsize <= MAX_FRAME_SIZE; newsize++) {
			if((camera_sizes[newsize].width == x) && (camera_sizes[newsize].height == y))
				break;
		}
	} else {
		newsize = cam->size;
	}

	if(newsize > MAX_FRAME_SIZE) {
		DEBUG(1, "couldn't find size %d,%d", x, y);
		return -EINVAL;
	}

	if(fps > 0) {
		DEBUG(1, "trying to set fps to %d", fps);
		newspeed = konicawc_find_fps(newsize, fps);
		DEBUG(1, "find_fps returned %d (%d)", newspeed, spd_to_fps[newsize][newspeed]);
	}

	if(newspeed > MAX_SPEED)
		return -EINVAL;

	DEBUG(1, "setting size to %d speed to %d", newsize, newspeed);
	if((newsize == cam->size) && (newspeed == cam->speed)) {
		DEBUG(1, "Nothing to do");
		return 0;
	}
	DEBUG(0, "setting to  %dx%d @ %d fps", camera_sizes[newsize].width,
	     camera_sizes[newsize].height, spd_to_fps[newsize][newspeed]/3);

	konicawc_stop_data(uvd);
	uvd->ifaceAltActive = spd_to_iface[newspeed];
	DEBUG(1, "new interface = %d", uvd->ifaceAltActive);
	cam->speed = newspeed;

	if(cam->size != newsize) {
		cam->size = newsize;
		konicawc_set_camera_size(uvd);
	}

	/* Flush the input queue and clear any current frame in progress */

	RingQueue_Flush(&uvd->dp);
	cam->lastframe = -2;
	if(uvd->curframe != -1) {
		uvd->frame[uvd->curframe].curline = 0;
		uvd->frame[uvd->curframe].seqRead_Length = 0;
		uvd->frame[uvd->curframe].seqRead_Index = 0;
	}

	konicawc_start_data(uvd);
	return 0;
}


static int konicawc_calculate_fps(struct uvd *uvd)
{
	struct konicawc *cam = uvd->user_data;
	return spd_to_fps[cam->size][cam->speed]/3;
}


static void konicawc_configure_video(struct uvd *uvd)
{
	struct konicawc *cam = (struct konicawc *)uvd->user_data;
	u8 buf[2];

	memset(&uvd->vpic, 0, sizeof(uvd->vpic));
	memset(&uvd->vpic_old, 0x55, sizeof(uvd->vpic_old));

	RESTRICT_TO_RANGE(brightness, 0, MAX_BRIGHTNESS);
	RESTRICT_TO_RANGE(contrast, 0, MAX_CONTRAST);
	RESTRICT_TO_RANGE(saturation, 0, MAX_SATURATION);
	RESTRICT_TO_RANGE(sharpness, 0, MAX_SHARPNESS);
	RESTRICT_TO_RANGE(whitebal, 0, MAX_WHITEBAL);

	cam->brightness = brightness / 11;
	cam->contrast = contrast / 11;
	cam->saturation = saturation / 11;
	cam->sharpness = sharpness / 11;
	cam->white_bal = whitebal / 11;

	uvd->vpic.colour = 108;
	uvd->vpic.hue = 108;
	uvd->vpic.brightness = brightness;
	uvd->vpic.contrast = contrast;
	uvd->vpic.whiteness = whitebal;
	uvd->vpic.depth = 6;
	uvd->vpic.palette = VIDEO_PALETTE_YUV420P;

	memset(&uvd->vcap, 0, sizeof(uvd->vcap));
	strcpy(uvd->vcap.name, "Konica Webcam");
	uvd->vcap.type = VID_TYPE_CAPTURE;
	uvd->vcap.channels = 1;
	uvd->vcap.audios = 0;
	uvd->vcap.minwidth = camera_sizes[SIZE_160X120].width;
	uvd->vcap.minheight = camera_sizes[SIZE_160X120].height;
	uvd->vcap.maxwidth = camera_sizes[SIZE_320X240].width;
	uvd->vcap.maxheight = camera_sizes[SIZE_320X240].height;

	memset(&uvd->vchan, 0, sizeof(uvd->vchan));
	uvd->vchan.flags = 0 ;
	uvd->vchan.tuners = 0;
	uvd->vchan.channel = 0;
	uvd->vchan.type = VIDEO_TYPE_CAMERA;
	strcpy(uvd->vchan.name, "Camera");

	/* Talk to device */
	DEBUG(1, "device init");
	if(!konicawc_get_misc(uvd, 0x3, 0, 0x10, buf, 2))
		DEBUG(2, "3,10 -> %2.2x %2.2x", buf[0], buf[1]);
	if(!konicawc_get_misc(uvd, 0x3, 0, 0x10, buf, 2))
		DEBUG(2, "3,10 -> %2.2x %2.2x", buf[0], buf[1]);
	if(konicawc_set_misc(uvd, 0x2, 0, 0xd))
		DEBUG(2, "2,0,d failed");
	DEBUG(1, "setting initial values");
}

static int konicawc_probe(struct usb_interface *intf, const struct usb_device_id *devid)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	struct uvd *uvd = NULL;
	int ix, i, nas;
	int actInterface=-1, inactInterface=-1, maxPS=0;
	unsigned char video_ep = 0;

	DEBUG(1, "konicawc_probe(%p)", intf);

	/* We don't handle multi-config cameras */
	if (dev->descriptor.bNumConfigurations != 1)
		return -ENODEV;

	dev_info(&intf->dev, "Konica Webcam (rev. 0x%04x)\n",
		 le16_to_cpu(dev->descriptor.bcdDevice));
	RESTRICT_TO_RANGE(speed, 0, MAX_SPEED);

	/* Validate found interface: must have one ISO endpoint */
	nas = intf->num_altsetting;
	if (nas != 8) {
		err("Incorrect number of alternate settings (%d) for this camera!", nas);
		return -ENODEV;
	}
	/* Validate all alternate settings */
	for (ix=0; ix < nas; ix++) {
		const struct usb_host_interface *interface;
		const struct usb_endpoint_descriptor *endpoint;

		interface = &intf->altsetting[ix];
		i = interface->desc.bAlternateSetting;
		if (interface->desc.bNumEndpoints != 2) {
			err("Interface %d. has %u. endpoints!",
			    interface->desc.bInterfaceNumber,
			    (unsigned)(interface->desc.bNumEndpoints));
			return -ENODEV;
		}
		endpoint = &interface->endpoint[1].desc;
		DEBUG(1, "found endpoint: addr: 0x%2.2x maxps = 0x%4.4x",
		    endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize));
		if (video_ep == 0)
			video_ep = endpoint->bEndpointAddress;
		else if (video_ep != endpoint->bEndpointAddress) {
			err("Alternate settings have different endpoint addresses!");
			return -ENODEV;
		}
		if (!usb_endpoint_xfer_isoc(endpoint)) {
			err("Interface %d. has non-ISO endpoint!",
			    interface->desc.bInterfaceNumber);
			return -ENODEV;
		}
		if (usb_endpoint_dir_out(endpoint)) {
			err("Interface %d. has ISO OUT endpoint!",
			    interface->desc.bInterfaceNumber);
			return -ENODEV;
		}
		if (le16_to_cpu(endpoint->wMaxPacketSize) == 0) {
			if (inactInterface < 0)
				inactInterface = i;
			else {
				err("More than one inactive alt. setting!");
				return -ENODEV;
			}
		} else {
			if (i == spd_to_iface[speed]) {
				/* This one is the requested one */
				actInterface = i;
			}
		}
		if (le16_to_cpu(endpoint->wMaxPacketSize) > maxPS)
			maxPS = le16_to_cpu(endpoint->wMaxPacketSize);
	}
	if(actInterface == -1) {
		err("Cant find required endpoint");
		return -ENODEV;
	}

	DEBUG(1, "Selecting requested active setting=%d. maxPS=%d.", actInterface, maxPS);

	uvd = usbvideo_AllocateDevice(cams);
	if (uvd != NULL) {
		struct konicawc *cam = (struct konicawc *)(uvd->user_data);
		/* Here uvd is a fully allocated uvd object */
		for(i = 0; i < USBVIDEO_NUMSBUF; i++) {
			cam->sts_urb[i] = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
			if(cam->sts_urb[i] == NULL) {
				while(i--) {
					usb_free_urb(cam->sts_urb[i]);
				}
				err("can't allocate urbs");
				return -ENOMEM;
			}
		}
		cam->speed = speed;
		RESTRICT_TO_RANGE(size, SIZE_160X120, SIZE_320X240);
		cam->width = camera_sizes[size].width;
		cam->height = camera_sizes[size].height;
		cam->size = size;

		uvd->flags = 0;
		uvd->debug = debug;
		uvd->dev = dev;
		uvd->iface = intf->altsetting->desc.bInterfaceNumber;
		uvd->ifaceAltInactive = inactInterface;
		uvd->ifaceAltActive = actInterface;
		uvd->video_endp = video_ep;
		uvd->iso_packet_len = maxPS;
		uvd->paletteBits = 1L << VIDEO_PALETTE_YUV420P;
		uvd->defaultPalette = VIDEO_PALETTE_YUV420P;
		uvd->canvas = VIDEOSIZE(320, 240);
		uvd->videosize = VIDEOSIZE(cam->width, cam->height);

		/* Initialize konicawc specific data */
		konicawc_configure_video(uvd);

		i = usbvideo_RegisterVideoDevice(uvd);
		uvd->max_frame_size = (320 * 240 * 3)/2;
		if (i != 0) {
			err("usbvideo_RegisterVideoDevice() failed.");
			uvd = NULL;
		}

		konicawc_register_input(cam, dev);
	}

	if (uvd) {
		usb_set_intfdata (intf, uvd);
		return 0;
	}
	return -EIO;
}


static void konicawc_free_uvd(struct uvd *uvd)
{
	int i;
	struct konicawc *cam = (struct konicawc *)uvd->user_data;

	konicawc_unregister_input(cam);

	for (i = 0; i < USBVIDEO_NUMSBUF; i++) {
		usb_free_urb(cam->sts_urb[i]);
		cam->sts_urb[i] = NULL;
	}
}


static struct usb_device_id id_table[] = {
	{ USB_DEVICE(0x04c8, 0x0720) }, /* Intel YC 76 */
	{ }  /* Terminating entry */
};


static int __init konicawc_init(void)
{
	struct usbvideo_cb cbTbl;
	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
	       DRIVER_DESC "\n");
	memset(&cbTbl, 0, sizeof(cbTbl));
	cbTbl.probe = konicawc_probe;
	cbTbl.setupOnOpen = konicawc_setup_on_open;
	cbTbl.processData = konicawc_process_isoc;
	cbTbl.getFPS = konicawc_calculate_fps;
	cbTbl.setVideoMode = konicawc_set_video_mode;
	cbTbl.startDataPump = konicawc_start_data;
	cbTbl.stopDataPump = konicawc_stop_data;
	cbTbl.adjustPicture = konicawc_adjust_picture;
	cbTbl.userFree = konicawc_free_uvd;
	return usbvideo_register(
		&cams,
		MAX_CAMERAS,
		sizeof(struct konicawc),
		"konicawc",
		&cbTbl,
		THIS_MODULE,
		id_table);
}


static void __exit konicawc_cleanup(void)
{
	usbvideo_Deregister(&cams);
}


MODULE_DEVICE_TABLE(usb, id_table);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Simon Evans <spse@secret.org.uk>");
MODULE_DESCRIPTION(DRIVER_DESC);
module_param(speed, int, 0);
MODULE_PARM_DESC(speed, "Initial speed: 0 (slowest) - 6 (fastest)");
module_param(size, int, 0);
MODULE_PARM_DESC(size, "Initial Size 0: 160x120 1: 160x136 2: 176x144 3: 320x240");
module_param(brightness, int, 0);
MODULE_PARM_DESC(brightness, "Initial brightness 0 - 108");
module_param(contrast, int, 0);
MODULE_PARM_DESC(contrast, "Initial contrast 0 - 108");
module_param(saturation, int, 0);
MODULE_PARM_DESC(saturation, "Initial saturation 0 - 108");
module_param(sharpness, int, 0);
MODULE_PARM_DESC(sharpness, "Initial brightness 0 - 108");
module_param(whitebal, int, 0);
MODULE_PARM_DESC(whitebal, "Initial white balance 0 - 363");

#ifdef CONFIG_USB_DEBUG
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug level: 0-9 (default=0)");
#endif

module_init(konicawc_init);
module_exit(konicawc_cleanup);