Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  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
/* Driver for Philips webcam
   Functions that send various control messages to the webcam, including
   video modes.
   (C) 1999-2003 Nemosoft Unv.
   (C) 2004-2006 Luc Saillard (luc@saillard.org)
   (C) 2011 Hans de Goede <hdegoede@redhat.com>

   NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
   driver and thus may have bugs that are not present in the original version.
   Please send bug reports and support requests to <luc@saillard.org>.

   NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
   driver and thus may have bugs that are not present in the original version.
   Please send bug reports and support requests to <luc@saillard.org>.
   The decompression routines have been implemented by reverse-engineering the
   Nemosoft binary pwcx module. Caveat emptor.

   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
*/

/*
   Changes
   2001/08/03  Alvarado   Added methods for changing white balance and
			  red/green gains
 */

/* Control functions for the cam; brightness, contrast, video mode, etc. */

#ifdef __KERNEL__
#include <asm/uaccess.h>
#endif
#include <asm/errno.h>

#include "pwc.h"
#include "pwc-kiara.h"
#include "pwc-timon.h"
#include "pwc-dec1.h"
#include "pwc-dec23.h"

/* Selectors for status controls used only in this file */
#define GET_STATUS_B00				0x0B00
#define SENSOR_TYPE_FORMATTER1			0x0C00
#define GET_STATUS_3000				0x3000
#define READ_RAW_Y_MEAN_FORMATTER		0x3100
#define SET_POWER_SAVE_MODE_FORMATTER		0x3200
#define MIRROR_IMAGE_FORMATTER			0x3300
#define LED_FORMATTER				0x3400
#define LOWLIGHT				0x3500
#define GET_STATUS_3600				0x3600
#define SENSOR_TYPE_FORMATTER2			0x3700
#define GET_STATUS_3800				0x3800
#define GET_STATUS_4000				0x4000
#define GET_STATUS_4100				0x4100	/* Get */
#define CTL_STATUS_4200				0x4200	/* [GS] 1 */

/* Formatters for the Video Endpoint controls [GS]ET_EP_STREAM_CTL */
#define VIDEO_OUTPUT_CONTROL_FORMATTER		0x0100

static const char *size2name[PSZ_MAX] =
{
	"subQCIF",
	"QSIF",
	"QCIF",
	"SIF",
	"CIF",
	"VGA",
};

/********/

/* Entries for the Nala (645/646) camera; the Nala doesn't have compression
   preferences, so you either get compressed or non-compressed streams.

   An alternate value of 0 means this mode is not available at all.
 */

#define PWC_FPS_MAX_NALA 8

struct Nala_table_entry {
	char alternate;			/* USB alternate setting */
	int compressed;			/* Compressed yes/no */

	unsigned char mode[3];		/* precomputed mode table */
};

static unsigned int Nala_fps_vector[PWC_FPS_MAX_NALA] = { 4, 5, 7, 10, 12, 15, 20, 24 };

static struct Nala_table_entry Nala_table[PSZ_MAX][PWC_FPS_MAX_NALA] =
{
#include "pwc-nala.h"
};

/****************************************************************************/

static int recv_control_msg(struct pwc_device *pdev,
	u8 request, u16 value, int recv_count)
{
	int rc;

	rc = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
		request,
		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
		value, pdev->vcinterface,
		pdev->ctrl_buf, recv_count, USB_CTRL_GET_TIMEOUT);
	if (rc < 0)
		PWC_ERROR("recv_control_msg error %d req %02x val %04x\n",
			  rc, request, value);
	return rc;
}

static inline int send_video_command(struct pwc_device *pdev,
	int index, const unsigned char *buf, int buflen)
{
	int rc;

	memcpy(pdev->ctrl_buf, buf, buflen);

	rc = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
			SET_EP_STREAM_CTL,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			VIDEO_OUTPUT_CONTROL_FORMATTER, index,
			pdev->ctrl_buf, buflen, USB_CTRL_SET_TIMEOUT);
	if (rc >= 0)
		memcpy(pdev->cmd_buf, buf, buflen);
	else
		PWC_ERROR("send_video_command error %d\n", rc);

	return rc;
}

int send_control_msg(struct pwc_device *pdev,
	u8 request, u16 value, void *buf, int buflen)
{
	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
			request,
			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			value, pdev->vcinterface,
			buf, buflen, USB_CTRL_SET_TIMEOUT);
}

static int set_video_mode_Nala(struct pwc_device *pdev, int size, int pixfmt,
			       int frames, int *compression, int send_to_cam)
{
	int fps, ret = 0;
	struct Nala_table_entry *pEntry;
	int frames2frames[31] =
	{ /* closest match of framerate */
	   0,  0,  0,  0,  4,  /*  0-4  */
	   5,  5,  7,  7, 10,  /*  5-9  */
	  10, 10, 12, 12, 15,  /* 10-14 */
	  15, 15, 15, 20, 20,  /* 15-19 */
	  20, 20, 20, 24, 24,  /* 20-24 */
	  24, 24, 24, 24, 24,  /* 25-29 */
	  24                   /* 30    */
	};
	int frames2table[31] =
	{ 0, 0, 0, 0, 0, /*  0-4  */
	  1, 1, 1, 2, 2, /*  5-9  */
	  3, 3, 4, 4, 4, /* 10-14 */
	  5, 5, 5, 5, 5, /* 15-19 */
	  6, 6, 6, 6, 7, /* 20-24 */
	  7, 7, 7, 7, 7, /* 25-29 */
	  7              /* 30    */
	};

	if (size < 0 || size > PSZ_CIF)
		return -EINVAL;
	if (frames < 4)
		frames = 4;
	else if (size > PSZ_QCIF && frames > 15)
		frames = 15;
	else if (frames > 25)
		frames = 25;
	frames = frames2frames[frames];
	fps = frames2table[frames];
	pEntry = &Nala_table[size][fps];
	if (pEntry->alternate == 0)
		return -EINVAL;

	if (send_to_cam)
		ret = send_video_command(pdev, pdev->vendpoint,
					 pEntry->mode, 3);
	if (ret < 0)
		return ret;

	if (pEntry->compressed && pixfmt == V4L2_PIX_FMT_YUV420)
		pwc_dec1_init(pdev, pEntry->mode);

	/* Set various parameters */
	pdev->pixfmt = pixfmt;
	pdev->vframes = frames;
	pdev->valternate = pEntry->alternate;
	pdev->width  = pwc_image_sizes[size][0];
	pdev->height = pwc_image_sizes[size][1];
	pdev->frame_size = (pdev->width * pdev->height * 3) / 2;
	if (pEntry->compressed) {
		if (pdev->release < 5) { /* 4 fold compression */
			pdev->vbandlength = 528;
			pdev->frame_size /= 4;
		}
		else {
			pdev->vbandlength = 704;
			pdev->frame_size /= 3;
		}
	}
	else
		pdev->vbandlength = 0;

	/* Let pwc-if.c:isoc_init know we don't support higher compression */
	*compression = 3;

	return 0;
}


static int set_video_mode_Timon(struct pwc_device *pdev, int size, int pixfmt,
				int frames, int *compression, int send_to_cam)
{
	const struct Timon_table_entry *pChoose;
	int fps, ret = 0;

	if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
		return -EINVAL;
	if (frames < 5)
		frames = 5;
	else if (size == PSZ_VGA && frames > 15)
		frames = 15;
	else if (frames > 30)
		frames = 30;
	fps = (frames / 5) - 1;

	/* Find a supported framerate with progressively higher compression */
	pChoose = NULL;
	while (*compression <= 3) {
		pChoose = &Timon_table[size][fps][*compression];
		if (pChoose->alternate != 0)
			break;
		(*compression)++;
	}
	if (pChoose == NULL || pChoose->alternate == 0)
		return -ENOENT; /* Not supported. */

	if (send_to_cam)
		ret = send_video_command(pdev, pdev->vendpoint,
					 pChoose->mode, 13);
	if (ret < 0)
		return ret;

	if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
		pwc_dec23_init(pdev, pChoose->mode);

	/* Set various parameters */
	pdev->pixfmt = pixfmt;
	pdev->vframes = (fps + 1) * 5;
	pdev->valternate = pChoose->alternate;
	pdev->width  = pwc_image_sizes[size][0];
	pdev->height = pwc_image_sizes[size][1];
	pdev->vbandlength = pChoose->bandlength;
	if (pChoose->bandlength > 0)
		pdev->frame_size = (pChoose->bandlength * pdev->height) / 4;
	else
		pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
	return 0;
}


static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int pixfmt,
				int frames, int *compression, int send_to_cam)
{
	const struct Kiara_table_entry *pChoose = NULL;
	int fps, ret = 0;

	if (size >= PSZ_MAX || *compression < 0 || *compression > 3)
		return -EINVAL;
	if (frames < 5)
		frames = 5;
	else if (size == PSZ_VGA && frames > 15)
		frames = 15;
	else if (frames > 30)
		frames = 30;
	fps = (frames / 5) - 1;

	/* Find a supported framerate with progressively higher compression */
	while (*compression <= 3) {
		pChoose = &Kiara_table[size][fps][*compression];
		if (pChoose->alternate != 0)
			break;
		(*compression)++;
	}
	if (pChoose == NULL || pChoose->alternate == 0)
		return -ENOENT; /* Not supported. */

	/* Firmware bug: video endpoint is 5, but commands are sent to endpoint 4 */
	if (send_to_cam)
		ret = send_video_command(pdev, 4, pChoose->mode, 12);
	if (ret < 0)
		return ret;

	if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
		pwc_dec23_init(pdev, pChoose->mode);

	/* All set and go */
	pdev->pixfmt = pixfmt;
	pdev->vframes = (fps + 1) * 5;
	pdev->valternate = pChoose->alternate;
	pdev->width  = pwc_image_sizes[size][0];
	pdev->height = pwc_image_sizes[size][1];
	pdev->vbandlength = pChoose->bandlength;
	if (pdev->vbandlength > 0)
		pdev->frame_size = (pdev->vbandlength * pdev->height) / 4;
	else
		pdev->frame_size = (pdev->width * pdev->height * 12) / 8;
	PWC_TRACE("frame_size=%d, vframes=%d, vsize=%d, vbandlength=%d\n",
	    pdev->frame_size, pdev->vframes, size, pdev->vbandlength);
	return 0;
}

int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
	int pixfmt, int frames, int *compression, int send_to_cam)
{
	int ret, size;

	PWC_DEBUG_FLOW("set_video_mode(%dx%d @ %d, pixfmt %08x).\n",
		       width, height, frames, pixfmt);
	size = pwc_get_size(pdev, width, height);
	PWC_TRACE("decode_size = %d.\n", size);

	if (DEVICE_USE_CODEC1(pdev->type)) {
		ret = set_video_mode_Nala(pdev, size, pixfmt, frames,
					  compression, send_to_cam);
	} else if (DEVICE_USE_CODEC3(pdev->type)) {
		ret = set_video_mode_Kiara(pdev, size, pixfmt, frames,
					   compression, send_to_cam);
	} else {
		ret = set_video_mode_Timon(pdev, size, pixfmt, frames,
					   compression, send_to_cam);
	}
	if (ret < 0) {
		PWC_ERROR("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret);
		return ret;
	}
	pdev->frame_total_size = pdev->frame_size + pdev->frame_header_size + pdev->frame_trailer_size;
	PWC_DEBUG_SIZE("Set resolution to %dx%d\n", pdev->width, pdev->height);
	return 0;
}

static unsigned int pwc_get_fps_Nala(struct pwc_device *pdev, unsigned int index, unsigned int size)
{
	unsigned int i;

	for (i = 0; i < PWC_FPS_MAX_NALA; i++) {
		if (Nala_table[size][i].alternate) {
			if (index--==0) return Nala_fps_vector[i];
		}
	}
	return 0;
}

static unsigned int pwc_get_fps_Kiara(struct pwc_device *pdev, unsigned int index, unsigned int size)
{
	unsigned int i;

	for (i = 0; i < PWC_FPS_MAX_KIARA; i++) {
		if (Kiara_table[size][i][3].alternate) {
			if (index--==0) return Kiara_fps_vector[i];
		}
	}
	return 0;
}

static unsigned int pwc_get_fps_Timon(struct pwc_device *pdev, unsigned int index, unsigned int size)
{
	unsigned int i;

	for (i=0; i < PWC_FPS_MAX_TIMON; i++) {
		if (Timon_table[size][i][3].alternate) {
			if (index--==0) return Timon_fps_vector[i];
		}
	}
	return 0;
}

unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size)
{
	unsigned int ret;

	if (DEVICE_USE_CODEC1(pdev->type)) {
		ret = pwc_get_fps_Nala(pdev, index, size);

	} else if (DEVICE_USE_CODEC3(pdev->type)) {
		ret = pwc_get_fps_Kiara(pdev, index, size);

	} else {
		ret = pwc_get_fps_Timon(pdev, index, size);
	}

	return ret;
}

int pwc_get_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
{
	int ret;

	ret = recv_control_msg(pdev, request, value, 1);
	if (ret < 0)
		return ret;

	*data = pdev->ctrl_buf[0];
	return 0;
}

int pwc_set_u8_ctrl(struct pwc_device *pdev, u8 request, u16 value, u8 data)
{
	int ret;

	pdev->ctrl_buf[0] = data;
	ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 1);
	if (ret < 0)
		return ret;

	return 0;
}

int pwc_get_s8_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
{
	int ret;

	ret = recv_control_msg(pdev, request, value, 1);
	if (ret < 0)
		return ret;

	*data = ((s8 *)pdev->ctrl_buf)[0];
	return 0;
}

int pwc_get_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, int *data)
{
	int ret;

	ret = recv_control_msg(pdev, request, value, 2);
	if (ret < 0)
		return ret;

	*data = (pdev->ctrl_buf[1] << 8) | pdev->ctrl_buf[0];
	return 0;
}

int pwc_set_u16_ctrl(struct pwc_device *pdev, u8 request, u16 value, u16 data)
{
	int ret;

	pdev->ctrl_buf[0] = data & 0xff;
	pdev->ctrl_buf[1] = data >> 8;
	ret = send_control_msg(pdev, request, value, pdev->ctrl_buf, 2);
	if (ret < 0)
		return ret;

	return 0;
}

int pwc_button_ctrl(struct pwc_device *pdev, u16 value)
{
	int ret;

	ret = send_control_msg(pdev, SET_STATUS_CTL, value, NULL, 0);
	if (ret < 0)
		return ret;

	return 0;
}

/* POWER */
void pwc_camera_power(struct pwc_device *pdev, int power)
{
	int r;

	if (!pdev->power_save)
		return;

	if (pdev->type < 675 || (pdev->type < 730 && pdev->release < 6))
		return;	/* Not supported by Nala or Timon < release 6 */

	if (power)
		pdev->ctrl_buf[0] = 0x00; /* active */
	else
		pdev->ctrl_buf[0] = 0xFF; /* power save */
	r = send_control_msg(pdev, SET_STATUS_CTL,
		SET_POWER_SAVE_MODE_FORMATTER, pdev->ctrl_buf, 1);
	if (r < 0)
		PWC_ERROR("Failed to power %s camera (%d)\n",
			  power ? "on" : "off", r);
}

int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value)
{
	int r;

	if (pdev->type < 730)
		return 0;
	on_value /= 100;
	off_value /= 100;
	if (on_value < 0)
		on_value = 0;
	if (on_value > 0xff)
		on_value = 0xff;
	if (off_value < 0)
		off_value = 0;
	if (off_value > 0xff)
		off_value = 0xff;

	pdev->ctrl_buf[0] = on_value;
	pdev->ctrl_buf[1] = off_value;

	r = send_control_msg(pdev,
		SET_STATUS_CTL, LED_FORMATTER, pdev->ctrl_buf, 2);
	if (r < 0)
		PWC_ERROR("Failed to set LED on/off time (%d)\n", r);

	return r;
}

#ifdef CONFIG_USB_PWC_DEBUG
int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor)
{
	int ret = -1, request;

	if (pdev->type < 675)
		request = SENSOR_TYPE_FORMATTER1;
	else if (pdev->type < 730)
		return -1; /* The Vesta series doesn't have this call */
	else
		request = SENSOR_TYPE_FORMATTER2;

	ret = recv_control_msg(pdev, GET_STATUS_CTL, request, 1);
	if (ret < 0)
		return ret;
	if (pdev->type < 675)
		*sensor = pdev->ctrl_buf[0] | 0x100;
	else
		*sensor = pdev->ctrl_buf[0];
	return 0;
}
#endif