Free Electrons

Embedded Linux Experts

  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
/*
 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
 *		      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
 * Copyright (c) 2002, 2003 Tuukka Toivonen
 * Copyright (c) 2008 Erik Andrén
 *
 * 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
 *
 * P/N 861037:      Sensor HDCS1000        ASIC STV0600
 * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
 * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
 * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
 * P/N 861075-0040: Sensor HDCS1000        ASIC
 * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
 * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/input.h>
#include "stv06xx_sensor.h"

MODULE_AUTHOR("Erik Andrén");
MODULE_DESCRIPTION("STV06XX USB Camera Driver");
MODULE_LICENSE("GPL");

static bool dump_bridge;
static bool dump_sensor;

int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
{
	int err;
	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
	struct usb_device *udev = sd->gspca_dev.dev;
	__u8 *buf = sd->gspca_dev.usb_buf;

	u8 len = (i2c_data > 0xff) ? 2 : 1;

	buf[0] = i2c_data & 0xff;
	buf[1] = (i2c_data >> 8) & 0xff;

	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			      0x04, 0x40, address, 0, buf, len,
			      STV06XX_URB_MSG_TIMEOUT);

	PDEBUG(D_CONF, "Written 0x%x to address 0x%x, status: %d",
	       i2c_data, address, err);

	return (err < 0) ? err : 0;
}

int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
{
	int err;
	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
	struct usb_device *udev = sd->gspca_dev.dev;
	__u8 *buf = sd->gspca_dev.usb_buf;

	err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
			      0x04, 0xc0, address, 0, buf, 1,
			      STV06XX_URB_MSG_TIMEOUT);

	*i2c_data = buf[0];

	PDEBUG(D_CONF, "Reading 0x%x from address 0x%x, status %d",
	       *i2c_data, address, err);

	return (err < 0) ? err : 0;
}

/* Wraps the normal write sensor bytes / words functions for writing a
   single value */
int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
{
	if (sd->sensor->i2c_len == 2) {
		u16 data[2] = { address, value };
		return stv06xx_write_sensor_words(sd, data, 1);
	} else {
		u8 data[2] = { address, value };
		return stv06xx_write_sensor_bytes(sd, data, 1);
	}
}

static int stv06xx_write_sensor_finish(struct sd *sd)
{
	int err = 0;

	if (sd->bridge == BRIDGE_STV610) {
		struct usb_device *udev = sd->gspca_dev.dev;
		__u8 *buf = sd->gspca_dev.usb_buf;

		buf[0] = 0;
		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
				      0x04, 0x40, 0x1704, 0, buf, 1,
				      STV06XX_URB_MSG_TIMEOUT);
	}

	return (err < 0) ? err : 0;
}

int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
{
	int err, i, j;
	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
	struct usb_device *udev = sd->gspca_dev.dev;
	__u8 *buf = sd->gspca_dev.usb_buf;

	PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
	for (i = 0; i < len;) {
		/* Build the command buffer */
		memset(buf, 0, I2C_BUFFER_LENGTH);
		for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
			buf[j] = data[2*i];
			buf[0x10 + j] = data[2*i+1];
			PDEBUG(D_CONF, "I2C: Writing 0x%02x to reg 0x%02x",
			data[2*i+1], data[2*i]);
		}
		buf[0x20] = sd->sensor->i2c_addr;
		buf[0x21] = j - 1; /* Number of commands to send - 1 */
		buf[0x22] = I2C_WRITE_CMD;
		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
				      0x04, 0x40, 0x0400, 0, buf,
				      I2C_BUFFER_LENGTH,
				      STV06XX_URB_MSG_TIMEOUT);
		if (err < 0)
			return err;
	}
	return stv06xx_write_sensor_finish(sd);
}

int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
{
	int err, i, j;
	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
	struct usb_device *udev = sd->gspca_dev.dev;
	__u8 *buf = sd->gspca_dev.usb_buf;

	PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);

	for (i = 0; i < len;) {
		/* Build the command buffer */
		memset(buf, 0, I2C_BUFFER_LENGTH);
		for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
			buf[j] = data[2*i];
			buf[0x10 + j * 2] = data[2*i+1];
			buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
			PDEBUG(D_CONF, "I2C: Writing 0x%04x to reg 0x%02x",
				data[2*i+1], data[2*i]);
		}
		buf[0x20] = sd->sensor->i2c_addr;
		buf[0x21] = j - 1; /* Number of commands to send - 1 */
		buf[0x22] = I2C_WRITE_CMD;
		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
				0x04, 0x40, 0x0400, 0, buf,
				I2C_BUFFER_LENGTH,
				STV06XX_URB_MSG_TIMEOUT);
		if (err < 0)
			return err;
	}
	return stv06xx_write_sensor_finish(sd);
}

int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
{
	int err;
	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
	struct usb_device *udev = sd->gspca_dev.dev;
	__u8 *buf = sd->gspca_dev.usb_buf;

	err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
	if (err < 0)
		return err;

	/* Clear mem */
	memset(buf, 0, I2C_BUFFER_LENGTH);

	buf[0] = address;
	buf[0x20] = sd->sensor->i2c_addr;
	buf[0x21] = 0;

	/* Read I2C register */
	buf[0x22] = I2C_READ_CMD;

	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			      0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
			      STV06XX_URB_MSG_TIMEOUT);
	if (err < 0) {
		pr_err("I2C: Read error writing address: %d\n", err);
		return err;
	}

	err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
			      0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
			      STV06XX_URB_MSG_TIMEOUT);
	if (sd->sensor->i2c_len == 2)
		*value = buf[0] | (buf[1] << 8);
	else
		*value = buf[0];

	PDEBUG(D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d",
	       *value, address, err);

	return (err < 0) ? err : 0;
}

/* Dumps all bridge registers */
static void stv06xx_dump_bridge(struct sd *sd)
{
	int i;
	u8 data, buf;

	pr_info("Dumping all stv06xx bridge registers\n");
	for (i = 0x1400; i < 0x160f; i++) {
		stv06xx_read_bridge(sd, i, &data);

		pr_info("Read 0x%x from address 0x%x\n", data, i);
	}

	pr_info("Testing stv06xx bridge registers for writability\n");
	for (i = 0x1400; i < 0x160f; i++) {
		stv06xx_read_bridge(sd, i, &data);
		buf = data;

		stv06xx_write_bridge(sd, i, 0xff);
		stv06xx_read_bridge(sd, i, &data);
		if (data == 0xff)
			pr_info("Register 0x%x is read/write\n", i);
		else if (data != buf)
			pr_info("Register 0x%x is read/write, but only partially\n",
				i);
		else
			pr_info("Register 0x%x is read-only\n", i);

		stv06xx_write_bridge(sd, i, buf);
	}
}

/* this function is called at probe and resume time */
static int stv06xx_init(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	int err;

	PDEBUG(D_PROBE, "Initializing camera");

	/* Let the usb init settle for a bit
	   before performing the initialization */
	msleep(250);

	err = sd->sensor->init(sd);

	if (dump_sensor && sd->sensor->dump)
		sd->sensor->dump(sd);

	return (err < 0) ? err : 0;
}

/* this function is called at probe time */
static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;

	PDEBUG(D_PROBE, "Initializing controls");

	gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
	return sd->sensor->init_controls(sd);
}

/* Start the camera */
static int stv06xx_start(struct gspca_dev *gspca_dev)
{
	struct sd *sd = (struct sd *) gspca_dev;
	struct usb_host_interface *alt;
	struct usb_interface *intf;
	int err, packet_size;

	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
	if (!alt) {
		PERR("Couldn't get altsetting");
		return -EIO;
	}

	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
	err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
	if (err < 0)
		return err;

	/* Prepare the sensor for start */
	err = sd->sensor->start(sd);
	if (err < 0)
		goto out;

	/* Start isochronous streaming */
	err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);

out:
	if (err < 0)
		PDEBUG(D_STREAM, "Starting stream failed");
	else
		PDEBUG(D_STREAM, "Started streaming");

	return (err < 0) ? err : 0;
}

static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
{
	struct usb_host_interface *alt;
	struct sd *sd = (struct sd *) gspca_dev;

	/* Start isoc bandwidth "negotiation" at max isoc bandwidth */
	alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
	alt->endpoint[0].desc.wMaxPacketSize =
		cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);

	return 0;
}

static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
{
	int ret, packet_size, min_packet_size;
	struct usb_host_interface *alt;
	struct sd *sd = (struct sd *) gspca_dev;

	alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
	min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
	if (packet_size <= min_packet_size)
		return -EIO;

	packet_size -= 100;
	if (packet_size < min_packet_size)
		packet_size = min_packet_size;
	alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);

	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
	if (ret < 0)
		PERR("set alt 1 err %d", ret);

	return ret;
}

static void stv06xx_stopN(struct gspca_dev *gspca_dev)
{
	int err;
	struct sd *sd = (struct sd *) gspca_dev;

	/* stop ISO-streaming */
	err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
	if (err < 0)
		goto out;

	err = sd->sensor->stop(sd);

out:
	if (err < 0)
		PDEBUG(D_STREAM, "Failed to stop stream");
	else
		PDEBUG(D_STREAM, "Stopped streaming");
}

/*
 * Analyse an USB packet of the data stream and store it appropriately.
 * Each packet contains an integral number of chunks. Each chunk has
 * 2-bytes identification, followed by 2-bytes that describe the chunk
 * length. Known/guessed chunk identifications are:
 * 8001/8005/C001/C005 - Begin new frame
 * 8002/8006/C002/C006 - End frame
 * 0200/4200           - Contains actual image data, bayer or compressed
 * 0005                - 11 bytes of unknown data
 * 0100                - 2 bytes of unknown data
 * The 0005 and 0100 chunks seem to appear only in compressed stream.
 */
static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
			u8 *data,			/* isoc packet */
			int len)			/* iso packet length */
{
	struct sd *sd = (struct sd *) gspca_dev;

	PDEBUG(D_PACK, "Packet of length %d arrived", len);

	/* A packet may contain several frames
	   loop until the whole packet is reached */
	while (len) {
		int id, chunk_len;

		if (len < 4) {
			PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
			return;
		}

		/* Capture the id */
		id = (data[0] << 8) | data[1];

		/* Capture the chunk length */
		chunk_len = (data[2] << 8) | data[3];
		PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);

		data += 4;
		len -= 4;

		if (len < chunk_len) {
			PERR("URB packet length is smaller"
				" than the specified chunk length");
			gspca_dev->last_packet_type = DISCARD_PACKET;
			return;
		}

		/* First byte seem to be 02=data 2nd byte is unknown??? */
		if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
			goto frame_data;

		switch (id) {
		case 0x0200:
		case 0x4200:
frame_data:
			PDEBUG(D_PACK, "Frame data packet detected");

			if (sd->to_skip) {
				int skip = (sd->to_skip < chunk_len) ?
					    sd->to_skip : chunk_len;
				data += skip;
				len -= skip;
				chunk_len -= skip;
				sd->to_skip -= skip;
			}

			gspca_frame_add(gspca_dev, INTER_PACKET,
					data, chunk_len);
			break;

		case 0x8001:
		case 0x8005:
		case 0xc001:
		case 0xc005:
			PDEBUG(D_PACK, "Starting new frame");

			/* Create a new frame, chunk length should be zero */
			gspca_frame_add(gspca_dev, FIRST_PACKET,
					NULL, 0);

			if (sd->bridge == BRIDGE_ST6422)
				sd->to_skip = gspca_dev->pixfmt.width * 4;

			if (chunk_len)
				PERR("Chunk length is "
					      "non-zero on a SOF");
			break;

		case 0x8002:
		case 0x8006:
		case 0xc002:
			PDEBUG(D_PACK, "End of frame detected");

			/* Complete the last frame (if any) */
			gspca_frame_add(gspca_dev, LAST_PACKET,
					NULL, 0);

			if (chunk_len)
				PERR("Chunk length is "
					      "non-zero on a EOF");
			break;

		case 0x0005:
			PDEBUG(D_PACK, "Chunk 0x005 detected");
			/* Unknown chunk with 11 bytes of data,
			   occurs just before end of each frame
			   in compressed mode */
			break;

		case 0x0100:
			PDEBUG(D_PACK, "Chunk 0x0100 detected");
			/* Unknown chunk with 2 bytes of data,
			   occurs 2-3 times per USB interrupt */
			break;
		case 0x42ff:
			PDEBUG(D_PACK, "Chunk 0x42ff detected");
			/* Special chunk seen sometimes on the ST6422 */
			break;
		default:
			PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id);
			/* Unknown chunk */
		}
		data    += chunk_len;
		len     -= chunk_len;
	}
}

#if IS_ENABLED(CONFIG_INPUT)
static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
			u8 *data,		/* interrupt packet data */
			int len)		/* interrupt packet length */
{
	int ret = -EINVAL;

	if (len == 1 && data[0] == 0x80) {
		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
		input_sync(gspca_dev->input_dev);
		ret = 0;
	}

	if (len == 1 && data[0] == 0x88) {
		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
		input_sync(gspca_dev->input_dev);
		ret = 0;
	}

	return ret;
}
#endif

static int stv06xx_config(struct gspca_dev *gspca_dev,
			  const struct usb_device_id *id);

/* sub-driver description */
static const struct sd_desc sd_desc = {
	.name = MODULE_NAME,
	.config = stv06xx_config,
	.init = stv06xx_init,
	.init_controls = stv06xx_init_controls,
	.start = stv06xx_start,
	.stopN = stv06xx_stopN,
	.pkt_scan = stv06xx_pkt_scan,
	.isoc_init = stv06xx_isoc_init,
	.isoc_nego = stv06xx_isoc_nego,
#if IS_ENABLED(CONFIG_INPUT)
	.int_pkt_scan = sd_int_pkt_scan,
#endif
};

/* This function is called at probe time */
static int stv06xx_config(struct gspca_dev *gspca_dev,
			  const struct usb_device_id *id)
{
	struct sd *sd = (struct sd *) gspca_dev;

	PDEBUG(D_PROBE, "Configuring camera");

	sd->bridge = id->driver_info;
	gspca_dev->sd_desc = &sd_desc;

	if (dump_bridge)
		stv06xx_dump_bridge(sd);

	sd->sensor = &stv06xx_sensor_st6422;
	if (!sd->sensor->probe(sd))
		return 0;

	sd->sensor = &stv06xx_sensor_vv6410;
	if (!sd->sensor->probe(sd))
		return 0;

	sd->sensor = &stv06xx_sensor_hdcs1x00;
	if (!sd->sensor->probe(sd))
		return 0;

	sd->sensor = &stv06xx_sensor_hdcs1020;
	if (!sd->sensor->probe(sd))
		return 0;

	sd->sensor = &stv06xx_sensor_pb0100;
	if (!sd->sensor->probe(sd))
		return 0;

	sd->sensor = NULL;
	return -ENODEV;
}



/* -- module initialisation -- */
static const struct usb_device_id device_table[] = {
	/* QuickCam Express */
	{USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },
	/* LEGO cam / QuickCam Web */
	{USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },
	/* Dexxa WebCam USB */
	{USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },
	/* QuickCam Messenger */
	{USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },
	/* QuickCam Communicate */
	{USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },
	/* QuickCam Messenger (new) */
	{USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },
	{}
};
MODULE_DEVICE_TABLE(usb, device_table);

/* -- device connect -- */
static int sd_probe(struct usb_interface *intf,
			const struct usb_device_id *id)
{
	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
			       THIS_MODULE);
}

static void sd_disconnect(struct usb_interface *intf)
{
	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
	struct sd *sd = (struct sd *) gspca_dev;
	void *priv = sd->sensor_priv;
	PDEBUG(D_PROBE, "Disconnecting the stv06xx device");

	sd->sensor = NULL;
	gspca_disconnect(intf);
	kfree(priv);
}

static struct usb_driver sd_driver = {
	.name = MODULE_NAME,
	.id_table = device_table,
	.probe = sd_probe,
	.disconnect = sd_disconnect,
#ifdef CONFIG_PM
	.suspend = gspca_suspend,
	.resume = gspca_resume,
	.reset_resume = gspca_resume,
#endif
};

module_usb_driver(sd_driver);

module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");

module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");