1 /*
2  * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
3  *		      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
4  * Copyright (c) 2002, 2003 Tuukka Toivonen
5  * Copyright (c) 2008 Erik Andrén
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20  *
21  * P/N 861037:      Sensor HDCS1000        ASIC STV0600
22  * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
23  * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
24  * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
25  * P/N 861075-0040: Sensor HDCS1000        ASIC
26  * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
27  * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
28  */
29 
30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 
32 #include <linux/input.h>
33 #include "stv06xx_sensor.h"
34 
35 MODULE_AUTHOR("Erik Andrén");
36 MODULE_DESCRIPTION("STV06XX USB Camera Driver");
37 MODULE_LICENSE("GPL");
38 
39 static bool dump_bridge;
40 static bool dump_sensor;
41 
42 int stv06xx_write_bridge(struct sd *sd, u16 address, u16 i2c_data)
43 {
44 	int err;
45 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
46 	struct usb_device *udev = sd->gspca_dev.dev;
47 	__u8 *buf = sd->gspca_dev.usb_buf;
48 
49 	u8 len = (i2c_data > 0xff) ? 2 : 1;
50 
51 	buf[0] = i2c_data & 0xff;
52 	buf[1] = (i2c_data >> 8) & 0xff;
53 
54 	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
55 			      0x04, 0x40, address, 0, buf, len,
56 			      STV06XX_URB_MSG_TIMEOUT);
57 
58 	PDEBUG(D_CONF, "Written 0x%x to address 0x%x, status: %d",
59 	       i2c_data, address, err);
60 
61 	return (err < 0) ? err : 0;
62 }
63 
64 int stv06xx_read_bridge(struct sd *sd, u16 address, u8 *i2c_data)
65 {
66 	int err;
67 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
68 	struct usb_device *udev = sd->gspca_dev.dev;
69 	__u8 *buf = sd->gspca_dev.usb_buf;
70 
71 	err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
72 			      0x04, 0xc0, address, 0, buf, 1,
73 			      STV06XX_URB_MSG_TIMEOUT);
74 
75 	*i2c_data = buf[0];
76 
77 	PDEBUG(D_CONF, "Reading 0x%x from address 0x%x, status %d",
78 	       *i2c_data, address, err);
79 
80 	return (err < 0) ? err : 0;
81 }
82 
83 /* Wraps the normal write sensor bytes / words functions for writing a
84    single value */
85 int stv06xx_write_sensor(struct sd *sd, u8 address, u16 value)
86 {
87 	if (sd->sensor->i2c_len == 2) {
88 		u16 data[2] = { address, value };
89 		return stv06xx_write_sensor_words(sd, data, 1);
90 	} else {
91 		u8 data[2] = { address, value };
92 		return stv06xx_write_sensor_bytes(sd, data, 1);
93 	}
94 }
95 
96 static int stv06xx_write_sensor_finish(struct sd *sd)
97 {
98 	int err = 0;
99 
100 	if (sd->bridge == BRIDGE_STV610) {
101 		struct usb_device *udev = sd->gspca_dev.dev;
102 		__u8 *buf = sd->gspca_dev.usb_buf;
103 
104 		buf[0] = 0;
105 		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
106 				      0x04, 0x40, 0x1704, 0, buf, 1,
107 				      STV06XX_URB_MSG_TIMEOUT);
108 	}
109 
110 	return (err < 0) ? err : 0;
111 }
112 
113 int stv06xx_write_sensor_bytes(struct sd *sd, const u8 *data, u8 len)
114 {
115 	int err, i, j;
116 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
117 	struct usb_device *udev = sd->gspca_dev.dev;
118 	__u8 *buf = sd->gspca_dev.usb_buf;
119 
120 	PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
121 	for (i = 0; i < len;) {
122 		/* Build the command buffer */
123 		memset(buf, 0, I2C_BUFFER_LENGTH);
124 		for (j = 0; j < I2C_MAX_BYTES && i < len; j++, i++) {
125 			buf[j] = data[2*i];
126 			buf[0x10 + j] = data[2*i+1];
127 			PDEBUG(D_CONF, "I2C: Writing 0x%02x to reg 0x%02x",
128 			data[2*i+1], data[2*i]);
129 		}
130 		buf[0x20] = sd->sensor->i2c_addr;
131 		buf[0x21] = j - 1; /* Number of commands to send - 1 */
132 		buf[0x22] = I2C_WRITE_CMD;
133 		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
134 				      0x04, 0x40, 0x0400, 0, buf,
135 				      I2C_BUFFER_LENGTH,
136 				      STV06XX_URB_MSG_TIMEOUT);
137 		if (err < 0)
138 			return err;
139 	}
140 	return stv06xx_write_sensor_finish(sd);
141 }
142 
143 int stv06xx_write_sensor_words(struct sd *sd, const u16 *data, u8 len)
144 {
145 	int err, i, j;
146 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
147 	struct usb_device *udev = sd->gspca_dev.dev;
148 	__u8 *buf = sd->gspca_dev.usb_buf;
149 
150 	PDEBUG(D_CONF, "I2C: Command buffer contains %d entries", len);
151 
152 	for (i = 0; i < len;) {
153 		/* Build the command buffer */
154 		memset(buf, 0, I2C_BUFFER_LENGTH);
155 		for (j = 0; j < I2C_MAX_WORDS && i < len; j++, i++) {
156 			buf[j] = data[2*i];
157 			buf[0x10 + j * 2] = data[2*i+1];
158 			buf[0x10 + j * 2 + 1] = data[2*i+1] >> 8;
159 			PDEBUG(D_CONF, "I2C: Writing 0x%04x to reg 0x%02x",
160 				data[2*i+1], data[2*i]);
161 		}
162 		buf[0x20] = sd->sensor->i2c_addr;
163 		buf[0x21] = j - 1; /* Number of commands to send - 1 */
164 		buf[0x22] = I2C_WRITE_CMD;
165 		err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
166 				0x04, 0x40, 0x0400, 0, buf,
167 				I2C_BUFFER_LENGTH,
168 				STV06XX_URB_MSG_TIMEOUT);
169 		if (err < 0)
170 			return err;
171 	}
172 	return stv06xx_write_sensor_finish(sd);
173 }
174 
175 int stv06xx_read_sensor(struct sd *sd, const u8 address, u16 *value)
176 {
177 	int err;
178 	struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;
179 	struct usb_device *udev = sd->gspca_dev.dev;
180 	__u8 *buf = sd->gspca_dev.usb_buf;
181 
182 	err = stv06xx_write_bridge(sd, STV_I2C_FLUSH, sd->sensor->i2c_flush);
183 	if (err < 0)
184 		return err;
185 
186 	/* Clear mem */
187 	memset(buf, 0, I2C_BUFFER_LENGTH);
188 
189 	buf[0] = address;
190 	buf[0x20] = sd->sensor->i2c_addr;
191 	buf[0x21] = 0;
192 
193 	/* Read I2C register */
194 	buf[0x22] = I2C_READ_CMD;
195 
196 	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
197 			      0x04, 0x40, 0x1400, 0, buf, I2C_BUFFER_LENGTH,
198 			      STV06XX_URB_MSG_TIMEOUT);
199 	if (err < 0) {
200 		pr_err("I2C: Read error writing address: %d\n", err);
201 		return err;
202 	}
203 
204 	err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
205 			      0x04, 0xc0, 0x1410, 0, buf, sd->sensor->i2c_len,
206 			      STV06XX_URB_MSG_TIMEOUT);
207 	if (sd->sensor->i2c_len == 2)
208 		*value = buf[0] | (buf[1] << 8);
209 	else
210 		*value = buf[0];
211 
212 	PDEBUG(D_CONF, "I2C: Read 0x%x from address 0x%x, status: %d",
213 	       *value, address, err);
214 
215 	return (err < 0) ? err : 0;
216 }
217 
218 /* Dumps all bridge registers */
219 static void stv06xx_dump_bridge(struct sd *sd)
220 {
221 	int i;
222 	u8 data, buf;
223 
224 	pr_info("Dumping all stv06xx bridge registers\n");
225 	for (i = 0x1400; i < 0x160f; i++) {
226 		stv06xx_read_bridge(sd, i, &data);
227 
228 		pr_info("Read 0x%x from address 0x%x\n", data, i);
229 	}
230 
231 	pr_info("Testing stv06xx bridge registers for writability\n");
232 	for (i = 0x1400; i < 0x160f; i++) {
233 		stv06xx_read_bridge(sd, i, &data);
234 		buf = data;
235 
236 		stv06xx_write_bridge(sd, i, 0xff);
237 		stv06xx_read_bridge(sd, i, &data);
238 		if (data == 0xff)
239 			pr_info("Register 0x%x is read/write\n", i);
240 		else if (data != buf)
241 			pr_info("Register 0x%x is read/write, but only partially\n",
242 				i);
243 		else
244 			pr_info("Register 0x%x is read-only\n", i);
245 
246 		stv06xx_write_bridge(sd, i, buf);
247 	}
248 }
249 
250 /* this function is called at probe and resume time */
251 static int stv06xx_init(struct gspca_dev *gspca_dev)
252 {
253 	struct sd *sd = (struct sd *) gspca_dev;
254 	int err;
255 
256 	PDEBUG(D_PROBE, "Initializing camera");
257 
258 	/* Let the usb init settle for a bit
259 	   before performing the initialization */
260 	msleep(250);
261 
262 	err = sd->sensor->init(sd);
263 
264 	if (dump_sensor && sd->sensor->dump)
265 		sd->sensor->dump(sd);
266 
267 	return (err < 0) ? err : 0;
268 }
269 
270 /* this function is called at probe time */
271 static int stv06xx_init_controls(struct gspca_dev *gspca_dev)
272 {
273 	struct sd *sd = (struct sd *) gspca_dev;
274 
275 	PDEBUG(D_PROBE, "Initializing controls");
276 
277 	gspca_dev->vdev.ctrl_handler = &gspca_dev->ctrl_handler;
278 	return sd->sensor->init_controls(sd);
279 }
280 
281 /* Start the camera */
282 static int stv06xx_start(struct gspca_dev *gspca_dev)
283 {
284 	struct sd *sd = (struct sd *) gspca_dev;
285 	struct usb_host_interface *alt;
286 	struct usb_interface *intf;
287 	int err, packet_size;
288 
289 	intf = usb_ifnum_to_if(sd->gspca_dev.dev, sd->gspca_dev.iface);
290 	alt = usb_altnum_to_altsetting(intf, sd->gspca_dev.alt);
291 	if (!alt) {
292 		PERR("Couldn't get altsetting");
293 		return -EIO;
294 	}
295 
296 	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
297 	err = stv06xx_write_bridge(sd, STV_ISO_SIZE_L, packet_size);
298 	if (err < 0)
299 		return err;
300 
301 	/* Prepare the sensor for start */
302 	err = sd->sensor->start(sd);
303 	if (err < 0)
304 		goto out;
305 
306 	/* Start isochronous streaming */
307 	err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 1);
308 
309 out:
310 	if (err < 0)
311 		PDEBUG(D_STREAM, "Starting stream failed");
312 	else
313 		PDEBUG(D_STREAM, "Started streaming");
314 
315 	return (err < 0) ? err : 0;
316 }
317 
318 static int stv06xx_isoc_init(struct gspca_dev *gspca_dev)
319 {
320 	struct usb_host_interface *alt;
321 	struct sd *sd = (struct sd *) gspca_dev;
322 
323 	/* Start isoc bandwidth "negotiation" at max isoc bandwidth */
324 	alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
325 	alt->endpoint[0].desc.wMaxPacketSize =
326 		cpu_to_le16(sd->sensor->max_packet_size[gspca_dev->curr_mode]);
327 
328 	return 0;
329 }
330 
331 static int stv06xx_isoc_nego(struct gspca_dev *gspca_dev)
332 {
333 	int ret, packet_size, min_packet_size;
334 	struct usb_host_interface *alt;
335 	struct sd *sd = (struct sd *) gspca_dev;
336 
337 	alt = &gspca_dev->dev->actconfig->intf_cache[0]->altsetting[1];
338 	packet_size = le16_to_cpu(alt->endpoint[0].desc.wMaxPacketSize);
339 	min_packet_size = sd->sensor->min_packet_size[gspca_dev->curr_mode];
340 	if (packet_size <= min_packet_size)
341 		return -EIO;
342 
343 	packet_size -= 100;
344 	if (packet_size < min_packet_size)
345 		packet_size = min_packet_size;
346 	alt->endpoint[0].desc.wMaxPacketSize = cpu_to_le16(packet_size);
347 
348 	ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1);
349 	if (ret < 0)
350 		PERR("set alt 1 err %d", ret);
351 
352 	return ret;
353 }
354 
355 static void stv06xx_stopN(struct gspca_dev *gspca_dev)
356 {
357 	int err;
358 	struct sd *sd = (struct sd *) gspca_dev;
359 
360 	/* stop ISO-streaming */
361 	err = stv06xx_write_bridge(sd, STV_ISO_ENABLE, 0);
362 	if (err < 0)
363 		goto out;
364 
365 	err = sd->sensor->stop(sd);
366 
367 out:
368 	if (err < 0)
369 		PDEBUG(D_STREAM, "Failed to stop stream");
370 	else
371 		PDEBUG(D_STREAM, "Stopped streaming");
372 }
373 
374 /*
375  * Analyse an USB packet of the data stream and store it appropriately.
376  * Each packet contains an integral number of chunks. Each chunk has
377  * 2-bytes identification, followed by 2-bytes that describe the chunk
378  * length. Known/guessed chunk identifications are:
379  * 8001/8005/C001/C005 - Begin new frame
380  * 8002/8006/C002/C006 - End frame
381  * 0200/4200           - Contains actual image data, bayer or compressed
382  * 0005                - 11 bytes of unknown data
383  * 0100                - 2 bytes of unknown data
384  * The 0005 and 0100 chunks seem to appear only in compressed stream.
385  */
386 static void stv06xx_pkt_scan(struct gspca_dev *gspca_dev,
387 			u8 *data,			/* isoc packet */
388 			int len)			/* iso packet length */
389 {
390 	struct sd *sd = (struct sd *) gspca_dev;
391 
392 	PDEBUG(D_PACK, "Packet of length %d arrived", len);
393 
394 	/* A packet may contain several frames
395 	   loop until the whole packet is reached */
396 	while (len) {
397 		int id, chunk_len;
398 
399 		if (len < 4) {
400 			PDEBUG(D_PACK, "Packet is smaller than 4 bytes");
401 			return;
402 		}
403 
404 		/* Capture the id */
405 		id = (data[0] << 8) | data[1];
406 
407 		/* Capture the chunk length */
408 		chunk_len = (data[2] << 8) | data[3];
409 		PDEBUG(D_PACK, "Chunk id: %x, length: %d", id, chunk_len);
410 
411 		data += 4;
412 		len -= 4;
413 
414 		if (len < chunk_len) {
415 			PERR("URB packet length is smaller"
416 				" than the specified chunk length");
417 			gspca_dev->last_packet_type = DISCARD_PACKET;
418 			return;
419 		}
420 
421 		/* First byte seem to be 02=data 2nd byte is unknown??? */
422 		if (sd->bridge == BRIDGE_ST6422 && (id & 0xff00) == 0x0200)
423 			goto frame_data;
424 
425 		switch (id) {
426 		case 0x0200:
427 		case 0x4200:
428 frame_data:
429 			PDEBUG(D_PACK, "Frame data packet detected");
430 
431 			if (sd->to_skip) {
432 				int skip = (sd->to_skip < chunk_len) ?
433 					    sd->to_skip : chunk_len;
434 				data += skip;
435 				len -= skip;
436 				chunk_len -= skip;
437 				sd->to_skip -= skip;
438 			}
439 
440 			gspca_frame_add(gspca_dev, INTER_PACKET,
441 					data, chunk_len);
442 			break;
443 
444 		case 0x8001:
445 		case 0x8005:
446 		case 0xc001:
447 		case 0xc005:
448 			PDEBUG(D_PACK, "Starting new frame");
449 
450 			/* Create a new frame, chunk length should be zero */
451 			gspca_frame_add(gspca_dev, FIRST_PACKET,
452 					NULL, 0);
453 
454 			if (sd->bridge == BRIDGE_ST6422)
455 				sd->to_skip = gspca_dev->pixfmt.width * 4;
456 
457 			if (chunk_len)
458 				PERR("Chunk length is "
459 					      "non-zero on a SOF");
460 			break;
461 
462 		case 0x8002:
463 		case 0x8006:
464 		case 0xc002:
465 			PDEBUG(D_PACK, "End of frame detected");
466 
467 			/* Complete the last frame (if any) */
468 			gspca_frame_add(gspca_dev, LAST_PACKET,
469 					NULL, 0);
470 
471 			if (chunk_len)
472 				PERR("Chunk length is "
473 					      "non-zero on a EOF");
474 			break;
475 
476 		case 0x0005:
477 			PDEBUG(D_PACK, "Chunk 0x005 detected");
478 			/* Unknown chunk with 11 bytes of data,
479 			   occurs just before end of each frame
480 			   in compressed mode */
481 			break;
482 
483 		case 0x0100:
484 			PDEBUG(D_PACK, "Chunk 0x0100 detected");
485 			/* Unknown chunk with 2 bytes of data,
486 			   occurs 2-3 times per USB interrupt */
487 			break;
488 		case 0x42ff:
489 			PDEBUG(D_PACK, "Chunk 0x42ff detected");
490 			/* Special chunk seen sometimes on the ST6422 */
491 			break;
492 		default:
493 			PDEBUG(D_PACK, "Unknown chunk 0x%04x detected", id);
494 			/* Unknown chunk */
495 		}
496 		data    += chunk_len;
497 		len     -= chunk_len;
498 	}
499 }
500 
501 #if IS_ENABLED(CONFIG_INPUT)
502 static int sd_int_pkt_scan(struct gspca_dev *gspca_dev,
503 			u8 *data,		/* interrupt packet data */
504 			int len)		/* interrupt packet length */
505 {
506 	int ret = -EINVAL;
507 
508 	if (len == 1 && data[0] == 0x80) {
509 		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 1);
510 		input_sync(gspca_dev->input_dev);
511 		ret = 0;
512 	}
513 
514 	if (len == 1 && data[0] == 0x88) {
515 		input_report_key(gspca_dev->input_dev, KEY_CAMERA, 0);
516 		input_sync(gspca_dev->input_dev);
517 		ret = 0;
518 	}
519 
520 	return ret;
521 }
522 #endif
523 
524 static int stv06xx_config(struct gspca_dev *gspca_dev,
525 			  const struct usb_device_id *id);
526 
527 /* sub-driver description */
528 static const struct sd_desc sd_desc = {
529 	.name = MODULE_NAME,
530 	.config = stv06xx_config,
531 	.init = stv06xx_init,
532 	.init_controls = stv06xx_init_controls,
533 	.start = stv06xx_start,
534 	.stopN = stv06xx_stopN,
535 	.pkt_scan = stv06xx_pkt_scan,
536 	.isoc_init = stv06xx_isoc_init,
537 	.isoc_nego = stv06xx_isoc_nego,
538 #if IS_ENABLED(CONFIG_INPUT)
539 	.int_pkt_scan = sd_int_pkt_scan,
540 #endif
541 };
542 
543 /* This function is called at probe time */
544 static int stv06xx_config(struct gspca_dev *gspca_dev,
545 			  const struct usb_device_id *id)
546 {
547 	struct sd *sd = (struct sd *) gspca_dev;
548 
549 	PDEBUG(D_PROBE, "Configuring camera");
550 
551 	sd->bridge = id->driver_info;
552 	gspca_dev->sd_desc = &sd_desc;
553 
554 	if (dump_bridge)
555 		stv06xx_dump_bridge(sd);
556 
557 	sd->sensor = &stv06xx_sensor_st6422;
558 	if (!sd->sensor->probe(sd))
559 		return 0;
560 
561 	sd->sensor = &stv06xx_sensor_vv6410;
562 	if (!sd->sensor->probe(sd))
563 		return 0;
564 
565 	sd->sensor = &stv06xx_sensor_hdcs1x00;
566 	if (!sd->sensor->probe(sd))
567 		return 0;
568 
569 	sd->sensor = &stv06xx_sensor_hdcs1020;
570 	if (!sd->sensor->probe(sd))
571 		return 0;
572 
573 	sd->sensor = &stv06xx_sensor_pb0100;
574 	if (!sd->sensor->probe(sd))
575 		return 0;
576 
577 	sd->sensor = NULL;
578 	return -ENODEV;
579 }
580 
581 
582 
583 /* -- module initialisation -- */
584 static const struct usb_device_id device_table[] = {
585 	/* QuickCam Express */
586 	{USB_DEVICE(0x046d, 0x0840), .driver_info = BRIDGE_STV600 },
587 	/* LEGO cam / QuickCam Web */
588 	{USB_DEVICE(0x046d, 0x0850), .driver_info = BRIDGE_STV610 },
589 	/* Dexxa WebCam USB */
590 	{USB_DEVICE(0x046d, 0x0870), .driver_info = BRIDGE_STV602 },
591 	/* QuickCam Messenger */
592 	{USB_DEVICE(0x046D, 0x08F0), .driver_info = BRIDGE_ST6422 },
593 	/* QuickCam Communicate */
594 	{USB_DEVICE(0x046D, 0x08F5), .driver_info = BRIDGE_ST6422 },
595 	/* QuickCam Messenger (new) */
596 	{USB_DEVICE(0x046D, 0x08F6), .driver_info = BRIDGE_ST6422 },
597 	{}
598 };
599 MODULE_DEVICE_TABLE(usb, device_table);
600 
601 /* -- device connect -- */
602 static int sd_probe(struct usb_interface *intf,
603 			const struct usb_device_id *id)
604 {
605 	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
606 			       THIS_MODULE);
607 }
608 
609 static void sd_disconnect(struct usb_interface *intf)
610 {
611 	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
612 	struct sd *sd = (struct sd *) gspca_dev;
613 	void *priv = sd->sensor_priv;
614 	PDEBUG(D_PROBE, "Disconnecting the stv06xx device");
615 
616 	sd->sensor = NULL;
617 	gspca_disconnect(intf);
618 	kfree(priv);
619 }
620 
621 static struct usb_driver sd_driver = {
622 	.name = MODULE_NAME,
623 	.id_table = device_table,
624 	.probe = sd_probe,
625 	.disconnect = sd_disconnect,
626 #ifdef CONFIG_PM
627 	.suspend = gspca_suspend,
628 	.resume = gspca_resume,
629 	.reset_resume = gspca_resume,
630 #endif
631 };
632 
633 module_usb_driver(sd_driver);
634 
635 module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
636 MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
637 
638 module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
639 MODULE_PARM_DESC(dump_sensor, "Dumps all sensor registers at startup");
640