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Add doxygen comments to some functions in microdia-debugfs.c
[microdia.git] / microdia-usb.c
blob8e0d9e35285f22b68fc5fd1405127147018f5376
1 /**
2 * @file microdia-usb.c
3 * @author Nicolas VIVIEN
4 * @date 2008-02-01
5 *
6 * @brief Driver for Microdia USB video camera
7 *
8 * @note Copyright (C) Nicolas VIVIEN
9 *
10 * @par Licences
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/kernel.h>
30 #include <linux/version.h>
31 #include <linux/errno.h>
32 #include <linux/slab.h>
33 #include <linux/kref.h>
34 #include <linux/stat.h>
35
36 #include <linux/usb.h>
37 #include <media/v4l2-common.h>
38
39 #include "microdia.h"
40 #include "sn9c20x.h"
41 #include "mt9vx11.h"
42 #include "ov965x.h"
43 #include "ov7660.h"
44
45 /**
46 * @var fps
47 * Module parameter to set frame per second
48 */
49 static int fps = 25;
50
51 /**
52 * @var hflip
53 * Module parameter to enable/disable the horizontal flip process
54 */
55 static int hflip;
56
57 /**
58 * @var flip_detect
59 * Module parameter to enable/disable vflip detection
60 */
61 static int flip_detect;
62
63 /**
64 * @var vflip
65 * Module parameter to enable/disable the vertical flip process
66 */
67 static int vflip;
68
69 /**
70 * @var brightness
71 * Module parameter to set the brightness
72 */
73 static int brightness = MICRODIA_PERCENT(50, 0xFFFF);
74
75 /**
76 * @var whiteness
77 * Module parameter to set the whiteness
78 */
79 static int whiteness = MICRODIA_PERCENT(20, 0xFFFF);
80
81 /**
82 * @var contrast
83 * Module parameter to set the contrast
84 */
85 static int contrast = MICRODIA_PERCENT(50, 0xFFFF);
86
87 /**
88 * @var exposure
89 * Module parameter to set the exposure
90 */
91 /* static int exposure = MICRODIA_PERCENT(20, 0xFFFF); */
92 static int exposure = MICRODIA_PERCENT(2, 0xFFFF);
93
94 /**
95 * @var sharpness
96 * Module parameter to set the sharpness
97 */
98 static int sharpness = MICRODIA_PERCENT(50, 0x3F);
99
100 /**
101 * @var rgb_gain
102 * Module parameter to set the red/green/blue gain
103 */
104 static int rgb_gain = MICRODIA_PERCENT(25, 0x7F) |
105 (MICRODIA_PERCENT(25, 0x7F) << 8) |
106 (MICRODIA_PERCENT(25, 0x7F) << 16);
107
108 /**
109 * @var min_buffers
110 * Module parameter to set the minimum number of image buffers
111 */
112 static int min_buffers = 2;
113
114 /**
115 * @var max_buffers
116 * Module parameter to set the maximum number of image buffers
117 */
118 static int max_buffers = 5;
119
120 /**
121 * @var auto_exposure
122 * Module parameter to set the exposure
123 */
124 static int auto_exposure = 1;
125
126 /**
127 * @var auto_whitebalance
128 * Module parameter to set the exposure
129 */
130 static int auto_whitebalance = 1;
131
132 /**
133 * @var log_level
134 * Module parameter to set the log level
135 */
136 __u8 log_level = 1;
137
138
139 /**
140 * @var microdia_table
141 * Define all the hotplug supported devices by this driver
142 */
143 static struct usb_device_id microdia_table[] = {
144 /* SN9C201 + MI1300 */
145 { USB_DEVICE(USB_0C45_VID, USB_6240_PID) },
146 /* SN9C201 + MI1310 */
147 { USB_DEVICE(USB_0C45_VID, USB_6242_PID) },
148 /* SN9C201 + S5K4AAFX */
149 { USB_DEVICE(USB_0C45_VID, USB_6243_PID) },
150 /* SN9C201 + OV9655 */
151 { USB_DEVICE(USB_0C45_VID, USB_6248_PID) },
152 /* SN9C201 + CX1332 */
153 { USB_DEVICE(USB_0C45_VID, USB_624B_PID) },
154 /* SN9C201 + MI1320 */
155 { USB_DEVICE(USB_0C45_VID, USB_624C_PID) },
156 /* SN9C201 + SOI968 */
157 { USB_DEVICE(USB_0C45_VID, USB_624E_PID) },
158 /* SN9C201 + OV9650 */
159 { USB_DEVICE(USB_0C45_VID, USB_624F_PID) },
160 /* SN9C201 + OV9650 */
161 { USB_DEVICE(USB_0C45_VID, USB_6253_PID) },
162 /* SN9C201 + OV7670ISP */
163 { USB_DEVICE(USB_0C45_VID, USB_6260_PID) },
164 /* SN9C201 + OM6802 */
165 { USB_DEVICE(USB_0C45_VID, USB_6262_PID) },
166 /* SN9C201 + MI0360/MT9V111 */
167 { USB_DEVICE(USB_0C45_VID, USB_6270_PID) },
168 /* SN9C201 + S5K53BEB */
169 { USB_DEVICE(USB_0C45_VID, USB_627A_PID) },
170 /* SN9C201 + OV7660 */
171 { USB_DEVICE(USB_0C45_VID, USB_627B_PID) },
172 /* SN9C201 + HV7131R */
173 { USB_DEVICE(USB_0C45_VID, USB_627C_PID) },
174 /* EEPROM */
175 { USB_DEVICE(USB_0C45_VID, USB_627F_PID) },
176 /* SN9C202 + MI1300 */
177 { USB_DEVICE(USB_0C45_VID, USB_6280_PID) },
178 /* SN9C202 + MI1310 */
179 { USB_DEVICE(USB_0C45_VID, USB_6282_PID) },
180 /* SN9C202 + S5K4AAFX */
181 { USB_DEVICE(USB_0C45_VID, USB_6283_PID) },
182 /* SN9C202 + OV9655 */
183 { USB_DEVICE(USB_0C45_VID, USB_6288_PID) },
184 /* SN9C202 + ICM107 */
185 { USB_DEVICE(USB_0C45_VID, USB_628A_PID) },
186 /* SN9C202 + CX1332 */
187 { USB_DEVICE(USB_0C45_VID, USB_628B_PID) },
188 /* SN9C202 + MI1320 */
189 { USB_DEVICE(USB_0C45_VID, USB_628C_PID) },
190 /* SN9C202 + SOI968 */
191 { USB_DEVICE(USB_0C45_VID, USB_628E_PID) },
192 /* SN9C202 + OV9650 */
193 { USB_DEVICE(USB_0C45_VID, USB_628F_PID) },
194 /* SN9C202 + OV7670ISP */
195 { USB_DEVICE(USB_0C45_VID, USB_62A0_PID) },
196 /* SN9C202 + OM6802 */
197 { USB_DEVICE(USB_0C45_VID, USB_62A2_PID) },
198 /* SN9C202 + MI0360/MT9V111 */
199 { USB_DEVICE(USB_0C45_VID, USB_62B0_PID) },
200 /* SN9C202 + OV9655 */
201 { USB_DEVICE(USB_0C45_VID, USB_62B3_PID) },
202 /* SN9C202 + S5K53BEB */
203 { USB_DEVICE(USB_0C45_VID, USB_62BA_PID) },
204 /* SN9C202 + OV7660 */
205 { USB_DEVICE(USB_0C45_VID, USB_62BB_PID) },
206 /* SN9C202 + HV7131R */
207 { USB_DEVICE(USB_0C45_VID, USB_62BC_PID) },
208 /* SN9C202 + OV7663 */
209 { USB_DEVICE(USB_0C45_VID, USB_62BE_PID) },
210 /* => 628f (SN9C202 + OV9650) */
211 { USB_DEVICE(USB_045E_VID, USB_00F4_PID) },
212 /* => 627b (SN9C201 + OV7660) */
213 { USB_DEVICE(USB_145F_VID, USB_013D_PID) },
214 /* => 62be (SN9C202 + OV7663 + EEPROM) */
215 { USB_DEVICE(USB_04F2_VID, USB_A128_PID) },
216 { }
217 };
218
219
220 MODULE_DEVICE_TABLE(usb, microdia_table); /**< Define the supported devices */
221
222 DEFINE_MUTEX(open_lock); /**< Define global mutex */
223
224 int microdia_6240_initialize(struct usb_microdia *dev);
225 int microdia_6240_start_stream(struct usb_microdia *dev);
226 int microdia_6240_stop_stream(struct usb_microdia *dev);
227 int microdia_6242_start_stream(struct usb_microdia *dev);
228 int microdia_6242_stop_stream(struct usb_microdia *dev);
229 int microdia_624e_initialize(struct usb_microdia *dev);
230 int microdia_624e_start_stream(struct usb_microdia *dev);
231 int microdia_624e_stop_stream(struct usb_microdia *dev);
232 int microdia_624f_initialize(struct usb_microdia *dev);
233 int microdia_624f_stop_stream(struct usb_microdia *dev);
234 int microdia_624f_start_stream(struct usb_microdia *dev);
235 int microdia_624f_set_exposure(struct usb_microdia *dev);
236 int microdia_624f_flip_detect(struct usb_microdia *dev);
237 int microdia_6260_initialize(struct usb_microdia *dev);
238 int microdia_6260_start_stream(struct usb_microdia *dev);
239 int microdia_6260_stop_stream(struct usb_microdia *dev);
240 int microdia_6260_flip_detect(struct usb_microdia *dev);
241 int microdia_6270_initialize(struct usb_microdia *dev);
242 int microdia_6270_start_stream(struct usb_microdia *dev);
243 int microdia_6270_stop_stream(struct usb_microdia *dev);
244 int microdia_627b_initialize(struct usb_microdia *dev);
245 int microdia_627b_start_stream(struct usb_microdia *dev);
246 int microdia_627b_stop_stream(struct usb_microdia *dev);
247 int microdia_627f_initialize(struct usb_microdia *dev);
248 int microdia_6288_initialize(struct usb_microdia *dev);
249 int microdia_6288_start_stream(struct usb_microdia *dev);
250 int microdia_6288_stop_stream(struct usb_microdia *dev);
251
252 /**
253 * @var cameras
254 *
255 * This array assigns all specific functions and settings to each cam.
256 *
257 */
258 struct microdia_camera cameras[] = {
259 {
260 .model = CAMERA_MODEL(USB_0C45_VID, USB_6240_PID),
261 .type = MICRODIA_VGA,
262 .sensor_slave_address = 0x5d,
263 .sensor_flags = SN9C20X_I2C_2WIRE,
264 .supported_fmts = 0x03,
265 .initialize = microdia_6240_initialize,
266 .start_stream = microdia_6240_start_stream,
267 .stop_stream = microdia_6240_stop_stream,
268 },
269 {
270 .model = CAMERA_MODEL(USB_0C45_VID, USB_6242_PID),
271 .type = MICRODIA_VGA,
272 .sensor_slave_address = 0x5d,
273 .sensor_flags = SN9C20X_I2C_2WIRE,
274 .supported_fmts = 0x03,
275 .initialize = microdia_624e_initialize,
276 .start_stream = microdia_6242_start_stream,
277 .stop_stream = microdia_6242_stop_stream,
278 },
279 {
280 .model = CAMERA_MODEL(USB_0C45_VID, USB_624E_PID),
281 .type = MICRODIA_VGA,
282 .sensor_slave_address = 0x30,
283 .sensor_flags = SN9C20X_I2C_2WIRE,
284 .supported_fmts = 0x03,
285 .initialize = microdia_624e_initialize,
286 .sensor_init = soi968_initialize,
287 .start_stream = microdia_624e_start_stream,
288 .stop_stream = microdia_624e_stop_stream,
289 .set_auto_exposure = ov965x_set_autoexposure,
290 /* .set_exposure = soi968_set_exposure, */
291 },
292 {
293 .model = CAMERA_MODEL(USB_0C45_VID, USB_624F_PID),
294 .type = MICRODIA_VGA,
295 .sensor_slave_address = 0x30,
296 .sensor_flags = SN9C20X_I2C_2WIRE,
297 .supported_fmts = 0x03,
298 .initialize = microdia_624f_initialize,
299 .sensor_init = ov965x_initialize,
300 .start_stream = microdia_624f_start_stream,
301 .stop_stream = microdia_624f_stop_stream,
302 .flip_detect = microdia_624f_flip_detect,
303 .set_auto_exposure = ov965x_set_autoexposure,
304 .set_exposure = ov965x_set_exposure,
305 .set_hvflip = ov965x_set_hvflip,
306 },
307 {
308 .model = CAMERA_MODEL(USB_0C45_VID, USB_6253_PID),
309 .type = MICRODIA_VGA,
310 .sensor_slave_address = 0x30,
311 .sensor_flags = SN9C20X_I2C_2WIRE,
312 .supported_fmts = 0x03,
313 .initialize = microdia_624f_initialize,
314 .sensor_init = ov965x_initialize,
315 .start_stream = microdia_624f_start_stream,
316 .stop_stream = microdia_624f_stop_stream,
317 .flip_detect = microdia_624f_flip_detect,
318 .set_auto_exposure = ov965x_set_autoexposure,
319 .set_exposure = ov965x_set_exposure,
320 .set_hvflip = ov965x_set_hvflip,
321 },
322 {
323 .model = CAMERA_MODEL(USB_0C45_VID, USB_6260_PID),
324 .type = MICRODIA_VGA,
325 .sensor_slave_address = 0x21,
326 .sensor_flags = SN9C20X_I2C_2WIRE,
327 .supported_fmts = 0x08,
328 .initialize = microdia_6260_initialize,
329 .start_stream = microdia_6260_start_stream,
330 .stop_stream = microdia_6260_stop_stream,
331 .flip_detect = microdia_6260_flip_detect,
332 },
333 {
334 .model = CAMERA_MODEL(USB_0C45_VID, USB_6270_PID),
335 .type = MICRODIA_VGA,
336 .sensor_slave_address = 0,
337 .sensor_flags = SN9C20X_I2C_2WIRE,
338 .supported_fmts = 0x07,
339 .initialize = microdia_6270_initialize,
340 .start_stream = microdia_6270_start_stream,
341 .stop_stream = microdia_6270_stop_stream,
342 .set_exposure = mt9vx11_set_exposure,
343 .set_hvflip = mt9vx11_set_hvflip,
344 .set_auto_exposure = mt9v111_set_autoexposure,
345 .set_auto_whitebalance = mt9v111_set_autowhitebalance,
346 },
347 {
348 .model = CAMERA_MODEL(USB_0C45_VID, USB_627B_PID),
349 .type = MICRODIA_VGA,
350 .sensor_slave_address = 0x21,
351 .sensor_flags = SN9C20X_I2C_2WIRE,
352 .supported_fmts = 0x07,
353 .initialize = microdia_627b_initialize,
354 .sensor_init = ov7660_initialize,
355 .start_stream = microdia_627b_start_stream,
356 .stop_stream = microdia_627b_stop_stream,
357 .set_auto_exposure = ov7660_set_autoexposure,
358 .set_exposure = ov7660_set_exposure,
359 },
360 {
361 .model = CAMERA_MODEL(USB_0C45_VID, USB_627F_PID),
362 .type = MICRODIA_VGA,
363 .sensor_slave_address = 0x30,
364 .sensor_flags = SN9C20X_I2C_2WIRE,
365 .supported_fmts = 0x03,
366 .initialize = microdia_624f_initialize,
367 .sensor_init = ov965x_initialize,
368 .start_stream = microdia_624f_start_stream,
369 .stop_stream = microdia_624f_stop_stream,
370 .flip_detect = microdia_624f_flip_detect,
371 .set_exposure = ov965x_set_exposure,
372 .set_hvflip = ov965x_set_hvflip,
373 },
374 {
375 .model = CAMERA_MODEL(USB_0C45_VID, USB_6288_PID),
376 .type = MICRODIA_VGA,
377 .sensor_slave_address = 0x30,
378 .sensor_flags = SN9C20X_I2C_2WIRE,
379 .supported_fmts = 0x03,
380 .initialize = microdia_6288_initialize,
381 .start_stream = microdia_6288_start_stream,
382 .stop_stream = microdia_6288_stop_stream,
383 .set_auto_exposure = ov965x_set_autoexposure,
384 },
385 {
386 .model = CAMERA_MODEL(USB_0C45_VID, USB_62B3_PID),
387 .type = MICRODIA_VGA,
388 .sensor_slave_address = 0x30,
389 .sensor_flags = SN9C20X_I2C_2WIRE,
390 .supported_fmts = 0x03,
391 .initialize = microdia_6288_initialize,
392 .start_stream = microdia_6288_start_stream,
393 .stop_stream = microdia_6288_stop_stream,
394 },
395 {
396 .model = CAMERA_MODEL(USB_0C45_VID, USB_62BB_PID),
397 .type = MICRODIA_VGA,
398 .sensor_slave_address = 0x21,
399 .sensor_flags = SN9C20X_I2C_2WIRE,
400 .supported_fmts = 0x07,
401 .initialize = microdia_627b_initialize,
402 .start_stream = microdia_627b_start_stream,
403 .stop_stream = microdia_627b_stop_stream,
404 },
405 {
406 .model = CAMERA_MODEL(USB_145F_VID, USB_013D_PID),
407 .type = MICRODIA_VGA,
408 .sensor_slave_address = 0x21,
409 .sensor_flags = SN9C20X_I2C_2WIRE,
410 .supported_fmts = 0x07,
411 .initialize = microdia_627b_initialize,
412 .start_stream = microdia_627b_start_stream,
413 .stop_stream = microdia_627b_stop_stream,
414 },
415 };
416
417
418 /**
419 * @brief Find device specific microdia_camera structure for model
420 *
421 * @param model Model we are looking for
422 *
423 * @returns Pointer to device specific microdia_camera structure or NULL
424 *
425 */
426 static inline struct microdia_camera *find_camera(__u32 model)
427 {
428 int i;
429 for (i = 0; i < ARRAY_SIZE(cameras); i++) {
430 if (cameras[i].model == model)
431 return &cameras[i];
432 }
433 return NULL;
434 }
435
436 /**
437 * @param dev Device structure
438 *
439 * @returns 0 if all is OK
440 *
441 * @brief Initilize an isochronous pipe.
442 *
443 * This function permits to initialize an URB transfert (or isochronous pipe).
444 */
445 int usb_microdia_isoc_init(struct usb_microdia *dev)
446 {
447 int i, j;
448 int ret = 0;
449 __u16 iso_max_frame_size;
450 struct urb *urb;
451 struct usb_device *udev;
452
453 if (dev == NULL)
454 return -EFAULT;
455
456 udev = dev->udev;
457
458 UDIA_DEBUG("usb_microdia_isoc_init()\n");
459
460 iso_max_frame_size = max_packet_sz(le16_to_cpu(dev->isoc_in_size)) *
461 hb_multiplier(le16_to_cpu(dev->isoc_in_size));
462
463 for (i = 0; i < MAX_ISO_BUFS; i++) {
464 urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
465
466 if (urb == NULL) {
467 UDIA_ERROR("Failed to allocate URB %d\n", i);
468 usb_microdia_isoc_cleanup(dev);
469 return -ENOMEM;
470 }
471
472 urb->interval = 1;
473 urb->dev = udev;
474 urb->pipe = usb_rcvisocpipe(udev, dev->isoc_in_endpointAddr);
475 urb->transfer_flags = URB_ISO_ASAP;
476 urb->transfer_buffer_length = iso_max_frame_size * ISO_FRAMES_PER_DESC;
477 urb->complete = usb_microdia_isoc_handler;
478 urb->context = dev;
479 urb->start_frame = 0;
480 urb->number_of_packets = ISO_FRAMES_PER_DESC;
481
482 for (j = 0; j < ISO_FRAMES_PER_DESC; j++) {
483 urb->iso_frame_desc[j].offset = j * iso_max_frame_size;
484 urb->iso_frame_desc[j].length = iso_max_frame_size;
485 }
486
487 dev->isobuf[i].data = kzalloc(urb->transfer_buffer_length,
488 GFP_KERNEL);
489 if (dev->isobuf[i].data == NULL) {
490 usb_microdia_isoc_cleanup(dev);
491 return -ENOMEM;
492 }
493
494 urb->transfer_buffer = dev->isobuf[i].data;
495 dev->isobuf[i].urb = urb;
496 }
497
498 UDIA_DEBUG("dev->isoc_in_size = %X\n", (unsigned int)dev->isoc_in_size);
499 UDIA_DEBUG("dev->isoc_in_endpointAddr = %X\n", dev->isoc_in_endpointAddr);
500
501 for (i = 0; i < MAX_ISO_BUFS; i++) {
502 ret = usb_submit_urb(dev->isobuf[i].urb, GFP_KERNEL);
503
504 if (ret)
505 UDIA_ERROR("isoc_init() submit_urb %d failed with error %d\n", i, ret);
506 }
507
508 return 0;
509 }
510
511
512 /**
513 * @param urb URB structure
514 *
515 * @brief ISOC handler
516 *
517 * This function is called as an URB transfert is complete (Isochronous pipe).
518 * So, the traitement is done in interrupt time, so it has be fast, not crash,
519 * and not stall. Neat.
520 */
521 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
522 void usb_microdia_isoc_handler(struct urb *urb, struct pt_regs *regs)
523 #else
524 void usb_microdia_isoc_handler(struct urb *urb)
525 #endif
526 {
527 int i;
528 int ret;
529
530 int framestatus;
531 unsigned int framelen;
532 unsigned long flags;
533
534 unsigned char *iso_buf = NULL;
535
536 void *mem = NULL;
537 struct microdia_buffer *buf = NULL;
538 struct usb_microdia *dev = urb->context;
539 struct microdia_video_queue *queue = &dev->queue;
540
541 unsigned char frame_header[] = {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96};
542
543 UDIA_STREAM("Isoc handler\n");
544
545 switch (urb->status) {
546 case 0:
547 break;
548
549 default:
550 UDIA_WARNING("Non-zero status (%d) in video "
551 "completion handler.\n", urb->status);
552
553 case -ENOENT: /* usb_kill_urb() called. */
554 if (queue->frozen)
555 return;
556
557 case -ECONNRESET: /* usb_unlink_urb() called. */
558 case -ESHUTDOWN: /* The endpoint is being disabled. */
559 microdia_queue_cancel(queue);
560 return;
561 }
562
563 spin_lock_irqsave(&queue->irqlock, flags);
564 if (!list_empty(&queue->irqqueue))
565 buf = list_first_entry(&queue->irqqueue, struct microdia_buffer,
566 queue);
567 spin_unlock_irqrestore(&queue->irqlock, flags);
568
569 for (i = 0; i < urb->number_of_packets; i++) {
570 framestatus = urb->iso_frame_desc[i].status;
571 if (framestatus != 0) {
572 UDIA_ERROR("Iso frame %d of USB has error %d\n",
573 i, framestatus);
574 continue;
575 }
576 framelen = urb->iso_frame_desc[i].actual_length;
577 iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
578
579 if (buf == NULL)
580 continue;
581
582 if (memcmp(iso_buf, frame_header, 6) == 0 && framelen == 64) {
583 UDIA_DEBUG("Frame Resolution: %dx%d\n",
584 iso_buf[0x3a] << 4, iso_buf[0x3b] << 3);
585 if (buf->buf.bytesused != 0)
586 buf->state = MICRODIA_BUF_STATE_DONE;
587 } else {
588 if (buf->state != MICRODIA_BUF_STATE_ACTIVE)
589 buf->state = MICRODIA_BUF_STATE_ACTIVE;
590
591 if (framelen + buf->buf.bytesused > queue->frame_size) {
592 UDIA_WARNING("Frame Buffer overflow!\n");
593 dev->vframes_overflow++;
594 buf->state = MICRODIA_BUF_STATE_DONE;
595 }
596 framelen = min(queue->frame_size - buf->buf.bytesused,
597 framelen);
598 mem = queue->mem + buf->buf.m.offset +
599 buf->buf.bytesused;
600 memcpy(mem, iso_buf, framelen);
601 buf->buf.bytesused += framelen;
602 }
603 if (buf->state == MICRODIA_BUF_STATE_DONE ||
604 buf->state == MICRODIA_BUF_STATE_ERROR) {
605 buf = microdia_queue_next_buffer(queue, buf);
606 if (buf == NULL)
607 dev->vframes_dropped++;
608 }
609 }
610
611 urb->dev = dev->udev;
612
613 ret = usb_submit_urb(urb, GFP_ATOMIC);
614
615 if (ret != 0) {
616 UDIA_ERROR("Error (%d) re-submitting urb in "
617 "microdia_isoc_handler.\n", ret);
618 }
619 }
620
621
622 /**
623 * @param dev Device structure
624 *
625 * @brief Clean-up all the ISOC buffers
626 *
627 * This function permits to clean-up all the ISOC buffers.
628 */
629 void usb_microdia_isoc_cleanup(struct usb_microdia *dev)
630 {
631 int i;
632 struct urb *urb;
633
634 UDIA_DEBUG("Isoc cleanup\n");
635
636 if (dev == NULL)
637 return;
638
639 for (i = 0; i < MAX_ISO_BUFS; i++) {
640 urb = dev->isobuf[i].urb;
641 if (urb == NULL)
642 continue;
643
644 usb_kill_urb(urb);
645
646 kfree(dev->isobuf[i].data);
647
648 usb_free_urb(urb);
649
650 dev->isobuf[i].urb = NULL;
651 }
652 }
653
654
655
656 /**
657 * @param dev Device structure
658 * @param index Choice of the interface
659 *
660 * @returns 0 if all is OK
661 *
662 * @brief Send the message SET_FEATURE and choose the interface
663 *
664 * This function permits to send the message SET_FEATURE on the USB bus.
665 */
666 int usb_microdia_set_feature(struct usb_microdia *dev, int index)
667 {
668 int result;
669 struct usb_device *udev = dev->udev;
670
671 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
672 USB_REQ_SET_FEATURE,
673 USB_TYPE_STANDARD | USB_DIR_OUT | USB_RECIP_DEVICE,
674 USB_DEVICE_REMOTE_WAKEUP,
675 index,
676 NULL,
677 0,
678 500);
679
680 if (result < 0)
681 UDIA_ERROR("SET FEATURE fail !\n");
682 else
683 UDIA_DEBUG("SET FEATURE\n");
684
685 return result;
686 }
687
688
689 /**
690 * @param dev Device structure
691 *
692 * @returns 0 if all is OK
693 *
694 * @brief Send the message SET_CONFIGURATION
695 *
696 * This function permits to send the message SET_CONFIGURATION on the USB bus.
697 */
698 int usb_microdia_set_configuration(struct usb_microdia *dev)
699 {
700 int result;
701 struct usb_device *udev = dev->udev;
702
703 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
704 USB_REQ_SET_CONFIGURATION,
705 USB_TYPE_STANDARD | USB_DIR_OUT | USB_RECIP_DEVICE,
706 0,
707 udev->config[0].desc.bConfigurationValue,
708 NULL,
709 0,
710 500);
711
712 if (result < 0)
713 UDIA_ERROR("SET CONFIGURATION fail !\n");
714 else
715 UDIA_DEBUG("SET CONFIGURATION %d\n", udev->config[0].desc.bConfigurationValue);
716
717 return result;
718 }
719
720
721 /**
722 * @param dev Device structure
723 * @param value register to write to
724 * @param data
725 * @param length number of bytes
726 *
727 * @returns 0 if all is OK
728 *
729 * @brief Write a 16-bit value to a 16-bit register
730 *
731 * This function permits to write a 16-bit value to a 16-bit register on the USB bus.
732 */
733 int usb_microdia_control_write(struct usb_microdia *dev, __u16 value, __u8 *data, __u16 length)
734 {
735 int result;
736 struct usb_device *udev = dev->udev;
737
738 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
739 0x08,
740 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
741 value,
742 0x00,
743 data,
744 length,
745 500);
746
747 if (result < 0)
748 UDIA_ERROR("Write register failed index = 0x%02X\n", value);
749
750 return result;
751 }
752
753 /**
754 * @param dev Device structure
755 * @param index register to read from
756 * @param data
757 * @param length number of bytes
758 *
759 * @returns 0 if all is OK
760 *
761 * @brief Read a 16-bit value from a 16-bit register
762 *
763 * This function permits to read a 16-bit value from a 16-bit register on the USB bus.
764 */
765 int usb_microdia_control_read(struct usb_microdia *dev, __u16 index, __u8 *data, __u16 length)
766 {
767 int result;
768
769 struct usb_device *udev = dev->udev;
770
771 *data = 0;
772
773 result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
774 0x00,
775 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
776 index,
777 0x00,
778 data,
779 length,
780 500);
781
782 if (result < 0)
783 UDIA_ERROR("Read register failed 0x%02X\n", index);
784
785 return result;
786 }
787
788
789 /**
790 * @param dev
791 *
792 * @returns 0 if all is OK
793 *
794 * @brief Set the default value about the video settings.
795 *
796 * This function permits to set the video settings for each video camera model.
797 *
798 */
799 static int usb_microdia_default_settings(struct usb_microdia *dev)
800 {
801 struct v4l2_pix_format *def_fmt;
802
803 dev->vframes_overflow = 0;
804 dev->vframes_incomplete = 0;
805 dev->vframes_dropped = 0;
806
807 dev->queue.min_buffers = min_buffers;
808 dev->queue.max_buffers = max_buffers;
809
810 def_fmt = v4l2_enum_supported_formats(dev, 0);
811
812 switch (dev->webcam_model) {
813 default:
814 dev->vsettings.fps = fps;
815 dev->vsettings.vflip = vflip;
816 dev->vsettings.hflip = hflip;
817 dev->vsettings.brightness = brightness & 0xffff;
818 dev->vsettings.contrast = contrast & 0xffff;
819 dev->vsettings.whiteness = whiteness & 0xffff;
820 dev->vsettings.exposure = exposure & 0xffff;
821 dev->vsettings.sharpness = sharpness & 0x3f;
822 dev->vsettings.rgb_gain[0] = (rgb_gain >> 16) & 0x7f;
823 dev->vsettings.rgb_gain[1] = (rgb_gain >> 8) & 0x7f;
824 dev->vsettings.rgb_gain[2] = (rgb_gain >> 8) & 0x7f;
825 dev->vsettings.rgb_gain[3] = rgb_gain & 0x7f;
826 dev->vsettings.auto_exposure = auto_exposure & 1;
827 dev->vsettings.auto_whitebalance = auto_whitebalance & 1;
828 dev->vsettings.hue = 0xffff;
829
830 if (def_fmt) {
831 memcpy(&(dev->vsettings.format),
832 def_fmt,
833 sizeof(struct v4l2_pix_format));
834 }
835
836 sn9c20x_set_resolution(dev, 640, 480);
837 break;
838 }
839 return 0;
840 }
841
842 /**
843 * @brief Load the driver
844 *
845 * @param interface
846 * @param id
847 *
848 * @returns 0 if all is OK
849 *
850 * This function detects the device and allocate the buffers for the device
851 * and the video interface.
852 */
853 static int usb_microdia_probe(struct usb_interface *interface, const struct usb_device_id *id)
854 {
855 int i;
856 int ret;
857 size_t buffer_size;
858
859 int vendor_id;
860 int product_id;
861 int bNumInterfaces;
862
863 struct usb_microdia *dev = NULL;
864 struct usb_device *udev = interface_to_usbdev(interface);
865 struct usb_host_interface *iface_desc;
866 struct usb_endpoint_descriptor *endpoint;
867 struct microdia_camera *camera = NULL;
868
869 /* Get USB VendorID and ProductID */
870 vendor_id = le16_to_cpu(udev->descriptor.idVendor);
871 product_id = le16_to_cpu(udev->descriptor.idProduct);
872
873 /* Check if we can handle this device */
874 UDIA_DEBUG("Probe function called with VendorID=%04X, ProductID=%04X and InterfaceNumber=%d\n",
875 vendor_id, product_id, interface->cur_altsetting->desc.bInterfaceNumber);
876
877 /*
878 //The interface are probed one by one.
879 // We are interested in the video interface (always the interface '0')
880 // The interfaces '1' or '2' (if presents) are the audio control.
881 */
882 if (interface->cur_altsetting->desc.bInterfaceNumber > 0) {
883 ret = -ENODEV;
884 goto error;
885 }
886
887 /* Detect device */
888 camera = find_camera(CAMERA_MODEL(vendor_id, product_id));
889 if (camera == NULL) {
890 UDIA_INFO("Camera %04X:%04X not supported.\n",
891 vendor_id, product_id);
892 ret = -ENODEV;
893 goto error;
894 }
895
896 UDIA_INFO("Microdia USB 2.0 Webcam - %04X:%04X plugged-in.\n",
897 vendor_id, product_id);
898
899
900 /*
901 // Allocate structure, initialize pointers, mutexes, etc.
902 // and link it to the usb_device
903 */
904 dev = kzalloc(sizeof(struct usb_microdia), GFP_KERNEL);
905
906 if (dev == NULL) {
907 UDIA_ERROR("Out of memory !\n");
908 ret = -ENOMEM;
909 goto error;
910 }
911
912 /* Init mutexes, spinlock, etc. */
913 mutex_init(&dev->mutex);
914 kref_init(&dev->vopen);
915
916 /* Save pointers */
917 dev->webcam_model = camera->model;
918 dev->webcam_type = camera->type;
919 if (dev->webcam_model == CAMERA_MODEL(USB_0C45_VID, USB_6260_PID))
920 dev->frame_size_divisor = MICRODIA_FRAME_SIZE_DIVISOR_6260;
921 else
922 dev->frame_size_divisor = MICRODIA_FRAME_SIZE_DIVISOR_DEFAULT;
923 dev->initialize = camera->initialize;
924 dev->sensor_init = camera->sensor_init;
925 dev->stop_stream = camera->stop_stream;
926 dev->start_stream = camera->start_stream;
927 dev->set_contrast = camera->set_contrast == NULL ?
928 sn9c20x_set_contrast : camera->set_contrast;
929 dev->set_brightness = camera->set_brightness == NULL ?
930 sn9c20x_set_brightness : camera->set_brightness;
931 dev->set_gamma = camera->set_gamma == NULL ?
932 sn9c20x_set_gamma : camera->set_gamma;
933 dev->set_sharpness = camera->set_sharpness == NULL ?
934 sn9c20x_set_sharpness : camera->set_sharpness;
935 dev->set_rgb_gain = camera->set_rgb_gain == NULL ?
936 sn9c20x_set_rgb_gain : camera->set_rgb_gain;
937 dev->set_exposure = camera->set_exposure == NULL ?
938 sn9c20x_set_exposure : camera->set_exposure;
939 if (flip_detect) {
940 UDIA_INFO("Rotate detection enabled\n");
941 dev->flip_detect = camera->flip_detect;
942 }
943 dev->set_hvflip = camera->set_hvflip;
944 dev->set_auto_exposure = camera->set_auto_exposure;
945 dev->set_auto_whitebalance = camera->set_auto_whitebalance;
946 dev->udev = udev;
947 dev->interface = interface;
948
949 dev->sensor_slave_address = camera->sensor_slave_address;
950 dev->sensor_flags = camera->sensor_flags;
951 dev->supported_fmts = camera->supported_fmts;
952
953 /* Read the product release */
954 dev->release = le16_to_cpu(udev->descriptor.bcdDevice);
955 UDIA_DEBUG("Release: %04x\n", dev->release);
956
957 /* How many interfaces (1 or 3) ? */
958 bNumInterfaces = udev->config->desc.bNumInterfaces;
959 UDIA_DEBUG("Number of interfaces : %d\n", bNumInterfaces);
960
961
962 /* Switch on the camera (to detect size of buffers) */
963 dev_microdia_camera_on(dev);
964
965 /*
966 // Set up the endpoint information
967 // use only the first int-in and isoc-in endpoints
968 // for the current alternate setting
969 */
970 iface_desc = interface->cur_altsetting;
971
972 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
973 endpoint = &iface_desc->endpoint[i].desc;
974
975 if (!dev->int_in_endpointAddr
976 && ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
977 && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
978 /* we found an interrupt in endpoint */
979 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
980
981 dev->int_in_size = buffer_size;
982 dev->int_in_endpointAddr = (endpoint->bEndpointAddress & 0xf);
983 }
984
985 if (!dev->isoc_in_endpointAddr
986 && ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
987 && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)) {
988 /* we found an isoc in endpoint */
989 buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
990
991 dev->isoc_in_size = buffer_size;
992 dev->isoc_in_endpointAddr = (endpoint->bEndpointAddress & 0xf);
993 }
994 }
995
996 if (!(dev->int_in_endpointAddr && dev->isoc_in_endpointAddr)) {
997 UDIA_ERROR("Could not find both int-in and isoc-in endpoints\n");
998 ret = -ENODEV;
999 goto free_dev;
1000 }
1001
1002 usb_microdia_default_settings(dev);
1003
1004 dev_microdia_camera_off(dev);
1005
1006 /* Initialize the video device */
1007 dev->vdev = video_device_alloc();
1008
1009 if (!dev->vdev) {
1010 ret = -ENOMEM;
1011 goto free_dev;
1012 }
1013
1014 /* Initialize the camera */
1015 dev_microdia_initialize_device(dev);
1016
1017 /* Register the video device */
1018 ret = v4l_microdia_register_video_device(dev);
1019
1020 if (ret)
1021 goto free_dev;
1022
1023 /* Create the entries in the sys filesystem */
1024 microdia_create_sysfs_files(dev->vdev);
1025
1026 #ifdef CONFIG_MICRODIA_DEBUGFS
1027 microdia_create_debugfs_files(dev);
1028 #endif
1029
1030 /* Save our data pointer in this interface device */
1031 usb_set_intfdata(interface, dev);
1032
1033 return 0;
1034
1035 free_dev:
1036 kref_put(&dev->vopen, usb_microdia_delete);
1037 error:
1038 return ret;
1039 }
1040
1041 void usb_microdia_delete(struct kref *kref)
1042 {
1043 struct usb_microdia *dev;
1044 dev = container_of(kref, struct usb_microdia, vopen);
1045
1046 if (dev->vdev != NULL) {
1047 microdia_remove_sysfs_files(dev->vdev);
1048 #ifdef CONFIG_MICRODIA_DEBUGFS
1049 microdia_remove_debugfs_files(dev);
1050 #endif
1051 v4l_microdia_unregister_video_device(dev);
1052 }
1053 kfree(dev);
1054 }
1055
1056 /**
1057 * @param interface
1058 *
1059 * @brief This function is called when the device is disconnected
1060 * or when the kernel module is unloaded.
1061 */
1062 static void usb_microdia_disconnect(struct usb_interface *interface)
1063 {
1064 struct usb_microdia *dev = usb_get_intfdata(interface);
1065
1066 UDIA_INFO("Microdia USB 2.0 Webcam unplugged\n");
1067
1068 usb_set_intfdata(interface, NULL);
1069
1070 mutex_lock(&open_lock);
1071 kref_put(&dev->vopen, usb_microdia_delete);
1072 mutex_unlock(&open_lock);
1073 }
1074
1075
1076 /**
1077 * @var usb_microdia_driver
1078 *
1079 * This variable contains some callback
1080 */
1081 static struct usb_driver usb_microdia_driver = {
1082 .name = "usb_microdia_driver",
1083 .probe = usb_microdia_probe,
1084 .disconnect = usb_microdia_disconnect,
1085 .id_table = microdia_table,
1086 };
1087
1088 module_param(fps, int, 0444); /**< @brief Module parameter frames per second */
1089 module_param(hflip, int, 0444); /**< @brief Module parameter horizontal flip process */
1090 module_param(vflip, int, 0444); /**< @brief Module parameter vertical flip process */
1091 module_param(flip_detect, int, 0444); /**< @brief Module parameter flip detect */
1092 module_param(auto_exposure, int, 0444); /**< @brief Module parameter automatic exposure control */
1093 module_param(auto_whitebalance, int, 0444); /**< @brief Module parameter automatic whitebalance control */
1094 module_param(brightness, int, 0444); /**< @brief Module parameter brightness */
1095 module_param(whiteness, int, 0444); /**< @brief Module parameter whiteness */
1096 module_param(contrast, int, 0444); /**< @brief Module parameter contrast */
1097 module_param(exposure, int, 0444); /**< @brief Module parameter exposure */
1098 module_param(sharpness, int, 0444); /**< @brief Module parameter sharpness */
1099 module_param(rgb_gain, int, 0444); /**< @brief Module parameter red/green/blue gain */
1100
1101 module_param(min_buffers, int, 0444);
1102 module_param(max_buffers, int, 0444);
1103
1104 module_param(log_level, byte, 0444);
1105
1106 /**
1107 * @returns 0 if all is OK
1108 *
1109 * @brief Initialize the driver.
1110 *
1111 * This function is called at first.
1112 * This function permits to define the default values from the command line.
1113 */
1114 static int __init usb_microdia_init(void)
1115 {
1116 int result;
1117
1118 UDIA_INFO("Microdia USB 2.0 webcam driver loaded\n");
1119
1120 #ifdef CONFIG_MICRODIA_DEBUGFS
1121 microdia_init_debugfs();
1122 #endif
1123
1124 if (fps < 10 || fps > 30) {
1125 UDIA_WARNING("Framerate out of bounds [10-30]! Defaulting to 25\n");
1126 fps = 25;
1127 }
1128
1129 if (vflip != 0 && vflip != 1) {
1130 UDIA_WARNING("Vertical flip should be 0 or 1! Defaulting to 0\n");
1131 vflip = 0;
1132 }
1133
1134 if (hflip != 0 && hflip != 1) {
1135 UDIA_WARNING("Horizontal flip should be 0 or 1! Defaulting to 0\n");
1136 hflip = 0;
1137 }
1138
1139 if (sharpness < 0 || sharpness > 0x3f) {
1140 UDIA_WARNING("Sharpness should be 0 to 63 ! Defaulting to 31\n");
1141 sharpness = 0x1f;
1142 }
1143
1144 if ((rgb_gain >> 16) < 0 || (rgb_gain >> 16) > 0x7f) {
1145 UDIA_WARNING("Red Gain should be 0 to 127 ! Defaulting to 32\n");
1146 rgb_gain = (rgb_gain & 0x0000ffff) | 0x200000;
1147 }
1148
1149 if (((rgb_gain >> 8) & 0xFF) < 0 || ((rgb_gain >> 8) & 0xFF) > 0x7f) {
1150 UDIA_WARNING("Green Gain should be 0 to 127 ! Defaulting to 32\n");
1151 rgb_gain = (rgb_gain & 0x00ff00ff) | 0x002000;
1152 }
1153
1154 if ((rgb_gain & 0xFF) < 0 || (rgb_gain & 0xFF) > 0x7f) {
1155 UDIA_WARNING("Blue Gain should be 0 to 127 ! Defaulting to 32\n");
1156 rgb_gain = (rgb_gain & 0x00ffff00) | 0x20;
1157 }
1158
1159 if (auto_exposure != 0 && auto_exposure != 1) {
1160 UDIA_WARNING("Automatic exposure should be 0 or 1! "
1161 "Defaulting to 1\n");
1162 auto_exposure = 1;
1163 }
1164
1165 if (auto_whitebalance != 0 && auto_whitebalance != 1) {
1166 UDIA_WARNING("Automatic whitebalance should be 0 or 1! "
1167 "Defaulting to 1\n");
1168 auto_whitebalance = 1;
1169 }
1170
1171 if (min_buffers < 2) {
1172 UDIA_WARNING("Minimum buffers can't be less then 2! "
1173 "Defaulting to 2\n");
1174 min_buffers = 2;
1175 }
1176
1177
1178 if (min_buffers > max_buffers) {
1179 UDIA_WARNING("Minimum buffers must be less then or equal to "
1180 "max buffers! Defaulting to 2, 10\n");
1181 min_buffers = 2;
1182 max_buffers = 5;
1183 }
1184
1185 /* Register the driver with the USB subsystem */
1186 result = usb_register(&usb_microdia_driver);
1187
1188 if (result)
1189 UDIA_ERROR("usb_register failed ! Error number %d\n", result);
1190
1191 UDIA_INFO(DRIVER_VERSION " : " DRIVER_DESC "\n");
1192
1193 return result;
1194 }
1195
1196
1197 /**
1198 * @brief Close the driver
1199 *
1200 * This function is called at last when you unload the driver.
1201 */
1202 static void __exit usb_microdia_exit(void)
1203 {
1204 UDIA_INFO("usb_microdia_exit: Microdia USB 2.0 webcam driver unloaded\n");
1205
1206 #ifdef CONFIG_MICRODIA_DEBUGFS
1207 microdia_uninit_debugfs();
1208 #endif
1209
1210 /* Deregister this driver with the USB subsystem */
1211 usb_deregister(&usb_microdia_driver);
1212 }
1213
1214
1215 module_init(usb_microdia_init); /**< @brief Module initialize */
1216 module_exit(usb_microdia_exit); /**< @brief Module exit */
1217
1218
1219 MODULE_PARM_DESC(fps, "Frames per second [10-30]"); /**< @brief Description of 'fps' parameter */
1220 MODULE_PARM_DESC(hflip, "Horizontal image flip"); /**< @brief Description of 'hflip' parameter */
1221 MODULE_PARM_DESC(vflip, "Vertical image flip"); /**< @brief Description of 'vflip' parameter */
1222 MODULE_PARM_DESC(flip_detect, "Image flip detection"); /**< @brief Description of 'vflip_detect' parameter */
1223 MODULE_PARM_DESC(auto_exposure, "Automatic exposure control"); /**< @brief Description of 'auto_exposure' parameter */
1224 MODULE_PARM_DESC(auto_whitebalance, "Automatic whitebalance"); /**< @brief Description of 'auto_whitebalance' parameter */
1225 MODULE_PARM_DESC(brightness, "Brightness setting"); /**< @brief Description of 'brightness' parameter */
1226 MODULE_PARM_DESC(whiteness, "Whiteness setting"); /**< @brief Description of 'whiteness' parameter */
1227 MODULE_PARM_DESC(exposure, "Exposure setting"); /**< @brief Description of 'exposure' parameter */
1228 MODULE_PARM_DESC(contrast, "Contrast setting"); /**< @brief Description of 'contrast' parameter */
1229 MODULE_PARM_DESC(sharpness, "Sharpness setting"); /**< @brief Description of 'sharpness' parameter */
1230 MODULE_PARM_DESC(rgb_gain, "Red/Green/Blue Gain setting"); /**< @brief Description of 'RGB Gain' parameter */
1231
1232 MODULE_PARM_DESC(min_buffers, "Minimum number of image buffers");
1233 MODULE_PARM_DESC(max_buffers, "Maximum number of image buffers");
1234 MODULE_PARM_DESC(log_level, " <n>\n"
1235 "Driver log level\n"
1236 "1 = info (default)\n"
1237 "2 = warning\n"
1238 "4 = error\n"
1239 "8 = debug\n"
1240 "16 = stream\n");
1241
1242 MODULE_LICENSE("GPL"); /**< @brief Driver is under licence GPL */
1243 MODULE_AUTHOR(DRIVER_AUTHOR); /**< @brief Driver is written by Nicolas VIVIEN */
1244 MODULE_DESCRIPTION(DRIVER_DESC); /**< @brief Define the description of the driver */
1245 MODULE_SUPPORTED_DEVICE(DRIVER_SUPPORT); /**< @brief List of supported device */
1246
1247
Microdia : webcam kernel driver, for USB webcams with vendor id 0c45