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RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / media / video / v4l2-common.c
blob8be5edb25c3263754e8915f28a9fe92b2c599b74
1 /*
2 * Video for Linux Two
3 *
4 * A generic video device interface for the LINUX operating system
5 * using a set of device structures/vectors for low level operations.
6 *
7 * This file replaces the videodev.c file that comes with the
8 * regular kernel distribution.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Author: Bill Dirks <bill@thedirks.org>
16 * based on code by Alan Cox, <alan@cymru.net>
17 *
18 */
19
20 /*
21 * Video capture interface for Linux
22 *
23 * A generic video device interface for the LINUX operating system
24 * using a set of device structures/vectors for low level operations.
25 *
26 * This program is free software; you can redistribute it and/or
27 * modify it under the terms of the GNU General Public License
28 * as published by the Free Software Foundation; either version
29 * 2 of the License, or (at your option) any later version.
30 *
31 * Author: Alan Cox, <alan@lxorguk.ukuu.org.uk>
32 *
33 * Fixes:
34 */
35
36 /*
37 * Video4linux 1/2 integration by Justin Schoeman
38 * <justin@suntiger.ee.up.ac.za>
39 * 2.4 PROCFS support ported from 2.4 kernels by
40 * Iñaki García Etxebarria <garetxe@euskalnet.net>
41 * Makefile fix by "W. Michael Petullo" <mike@flyn.org>
42 * 2.4 devfs support ported from 2.4 kernels by
43 * Dan Merillat <dan@merillat.org>
44 * Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
45 */
46
47 #include <linux/module.h>
48 #include <linux/types.h>
49 #include <linux/kernel.h>
50 #include <linux/mm.h>
51 #include <linux/string.h>
52 #include <linux/errno.h>
53 #include <linux/i2c.h>
54 #include <asm/uaccess.h>
55 #include <asm/system.h>
56 #include <asm/pgtable.h>
57 #include <asm/io.h>
58 #include <asm/div64.h>
59 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
60 #include <media/v4l2-common.h>
61 #include <media/v4l2-device.h>
62 #include <media/v4l2-chip-ident.h>
63
64 #include <linux/videodev2.h>
65
66 MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr");
67 MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers");
68 MODULE_LICENSE("GPL");
69
70 /*
71 *
72 * V 4 L 2 D R I V E R H E L P E R A P I
73 *
74 */
75
76 /*
77 * Video Standard Operations (contributed by Michael Schimek)
78 */
79
80
81 /* ----------------------------------------------------------------- */
82 /* priority handling */
83
84 #define V4L2_PRIO_VALID(val) (val == V4L2_PRIORITY_BACKGROUND || \
85 val == V4L2_PRIORITY_INTERACTIVE || \
86 val == V4L2_PRIORITY_RECORD)
87
88 int v4l2_prio_init(struct v4l2_prio_state *global)
89 {
90 memset(global,0,sizeof(*global));
91 return 0;
92 }
93 EXPORT_SYMBOL(v4l2_prio_init);
94
95 int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
96 enum v4l2_priority new)
97 {
98 if (!V4L2_PRIO_VALID(new))
99 return -EINVAL;
100 if (*local == new)
101 return 0;
102
103 atomic_inc(&global->prios[new]);
104 if (V4L2_PRIO_VALID(*local))
105 atomic_dec(&global->prios[*local]);
106 *local = new;
107 return 0;
108 }
109 EXPORT_SYMBOL(v4l2_prio_change);
110
111 int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local)
112 {
113 return v4l2_prio_change(global,local,V4L2_PRIORITY_DEFAULT);
114 }
115 EXPORT_SYMBOL(v4l2_prio_open);
116
117 int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local)
118 {
119 if (V4L2_PRIO_VALID(*local))
120 atomic_dec(&global->prios[*local]);
121 return 0;
122 }
123 EXPORT_SYMBOL(v4l2_prio_close);
124
125 enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global)
126 {
127 if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0)
128 return V4L2_PRIORITY_RECORD;
129 if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0)
130 return V4L2_PRIORITY_INTERACTIVE;
131 if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0)
132 return V4L2_PRIORITY_BACKGROUND;
133 return V4L2_PRIORITY_UNSET;
134 }
135 EXPORT_SYMBOL(v4l2_prio_max);
136
137 int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local)
138 {
139 if (*local < v4l2_prio_max(global))
140 return -EBUSY;
141 return 0;
142 }
143 EXPORT_SYMBOL(v4l2_prio_check);
144
145 /* ----------------------------------------------------------------- */
146
147 /* Helper functions for control handling */
148
149 /* Check for correctness of the ctrl's value based on the data from
150 struct v4l2_queryctrl and the available menu items. Note that
151 menu_items may be NULL, in that case it is ignored. */
152 int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
153 const char **menu_items)
154 {
155 if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED)
156 return -EINVAL;
157 if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED)
158 return -EBUSY;
159 if (qctrl->type == V4L2_CTRL_TYPE_STRING)
160 return 0;
161 if (qctrl->type == V4L2_CTRL_TYPE_BUTTON ||
162 qctrl->type == V4L2_CTRL_TYPE_INTEGER64 ||
163 qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
164 return 0;
165 if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum)
166 return -ERANGE;
167 if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) {
168 if (menu_items[ctrl->value] == NULL ||
169 menu_items[ctrl->value][0] == '\0')
170 return -EINVAL;
171 }
172 return 0;
173 }
174 EXPORT_SYMBOL(v4l2_ctrl_check);
175
176 /* Returns NULL or a character pointer array containing the menu for
177 the given control ID. The pointer array ends with a NULL pointer.
178 An empty string signifies a menu entry that is invalid. This allows
179 drivers to disable certain options if it is not supported. */
180 const char **v4l2_ctrl_get_menu(u32 id)
181 {
182 static const char *mpeg_audio_sampling_freq[] = {
183 "44.1 kHz",
184 "48 kHz",
185 "32 kHz",
186 NULL
187 };
188 static const char *mpeg_audio_encoding[] = {
189 "MPEG-1/2 Layer I",
190 "MPEG-1/2 Layer II",
191 "MPEG-1/2 Layer III",
192 "MPEG-2/4 AAC",
193 "AC-3",
194 NULL
195 };
196 static const char *mpeg_audio_l1_bitrate[] = {
197 "32 kbps",
198 "64 kbps",
199 "96 kbps",
200 "128 kbps",
201 "160 kbps",
202 "192 kbps",
203 "224 kbps",
204 "256 kbps",
205 "288 kbps",
206 "320 kbps",
207 "352 kbps",
208 "384 kbps",
209 "416 kbps",
210 "448 kbps",
211 NULL
212 };
213 static const char *mpeg_audio_l2_bitrate[] = {
214 "32 kbps",
215 "48 kbps",
216 "56 kbps",
217 "64 kbps",
218 "80 kbps",
219 "96 kbps",
220 "112 kbps",
221 "128 kbps",
222 "160 kbps",
223 "192 kbps",
224 "224 kbps",
225 "256 kbps",
226 "320 kbps",
227 "384 kbps",
228 NULL
229 };
230 static const char *mpeg_audio_l3_bitrate[] = {
231 "32 kbps",
232 "40 kbps",
233 "48 kbps",
234 "56 kbps",
235 "64 kbps",
236 "80 kbps",
237 "96 kbps",
238 "112 kbps",
239 "128 kbps",
240 "160 kbps",
241 "192 kbps",
242 "224 kbps",
243 "256 kbps",
244 "320 kbps",
245 NULL
246 };
247 static const char *mpeg_audio_ac3_bitrate[] = {
248 "32 kbps",
249 "40 kbps",
250 "48 kbps",
251 "56 kbps",
252 "64 kbps",
253 "80 kbps",
254 "96 kbps",
255 "112 kbps",
256 "128 kbps",
257 "160 kbps",
258 "192 kbps",
259 "224 kbps",
260 "256 kbps",
261 "320 kbps",
262 "384 kbps",
263 "448 kbps",
264 "512 kbps",
265 "576 kbps",
266 "640 kbps",
267 NULL
268 };
269 static const char *mpeg_audio_mode[] = {
270 "Stereo",
271 "Joint Stereo",
272 "Dual",
273 "Mono",
274 NULL
275 };
276 static const char *mpeg_audio_mode_extension[] = {
277 "Bound 4",
278 "Bound 8",
279 "Bound 12",
280 "Bound 16",
281 NULL
282 };
283 static const char *mpeg_audio_emphasis[] = {
284 "No Emphasis",
285 "50/15 us",
286 "CCITT J17",
287 NULL
288 };
289 static const char *mpeg_audio_crc[] = {
290 "No CRC",
291 "16-bit CRC",
292 NULL
293 };
294 static const char *mpeg_video_encoding[] = {
295 "MPEG-1",
296 "MPEG-2",
297 "MPEG-4 AVC",
298 NULL
299 };
300 static const char *mpeg_video_aspect[] = {
301 "1x1",
302 "4x3",
303 "16x9",
304 "2.21x1",
305 NULL
306 };
307 static const char *mpeg_video_bitrate_mode[] = {
308 "Variable Bitrate",
309 "Constant Bitrate",
310 NULL
311 };
312 static const char *mpeg_stream_type[] = {
313 "MPEG-2 Program Stream",
314 "MPEG-2 Transport Stream",
315 "MPEG-1 System Stream",
316 "MPEG-2 DVD-compatible Stream",
317 "MPEG-1 VCD-compatible Stream",
318 "MPEG-2 SVCD-compatible Stream",
319 NULL
320 };
321 static const char *mpeg_stream_vbi_fmt[] = {
322 "No VBI",
323 "Private packet, IVTV format",
324 NULL
325 };
326 static const char *camera_power_line_frequency[] = {
327 "Disabled",
328 "50 Hz",
329 "60 Hz",
330 NULL
331 };
332 static const char *camera_exposure_auto[] = {
333 "Auto Mode",
334 "Manual Mode",
335 "Shutter Priority Mode",
336 "Aperture Priority Mode",
337 NULL
338 };
339 static const char *colorfx[] = {
340 "None",
341 "Black & White",
342 "Sepia",
343 NULL
344 };
345 static const char *tune_preemphasis[] = {
346 "No preemphasis",
347 "50 useconds",
348 "75 useconds",
349 NULL,
350 };
351
352 switch (id) {
353 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
354 return mpeg_audio_sampling_freq;
355 case V4L2_CID_MPEG_AUDIO_ENCODING:
356 return mpeg_audio_encoding;
357 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
358 return mpeg_audio_l1_bitrate;
359 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
360 return mpeg_audio_l2_bitrate;
361 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
362 return mpeg_audio_l3_bitrate;
363 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
364 return mpeg_audio_ac3_bitrate;
365 case V4L2_CID_MPEG_AUDIO_MODE:
366 return mpeg_audio_mode;
367 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
368 return mpeg_audio_mode_extension;
369 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
370 return mpeg_audio_emphasis;
371 case V4L2_CID_MPEG_AUDIO_CRC:
372 return mpeg_audio_crc;
373 case V4L2_CID_MPEG_VIDEO_ENCODING:
374 return mpeg_video_encoding;
375 case V4L2_CID_MPEG_VIDEO_ASPECT:
376 return mpeg_video_aspect;
377 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
378 return mpeg_video_bitrate_mode;
379 case V4L2_CID_MPEG_STREAM_TYPE:
380 return mpeg_stream_type;
381 case V4L2_CID_MPEG_STREAM_VBI_FMT:
382 return mpeg_stream_vbi_fmt;
383 case V4L2_CID_POWER_LINE_FREQUENCY:
384 return camera_power_line_frequency;
385 case V4L2_CID_EXPOSURE_AUTO:
386 return camera_exposure_auto;
387 case V4L2_CID_COLORFX:
388 return colorfx;
389 case V4L2_CID_TUNE_PREEMPHASIS:
390 return tune_preemphasis;
391 default:
392 return NULL;
393 }
394 }
395 EXPORT_SYMBOL(v4l2_ctrl_get_menu);
396
397 /* Return the control name. */
398 const char *v4l2_ctrl_get_name(u32 id)
399 {
400 switch (id) {
401 /* USER controls */
402 case V4L2_CID_USER_CLASS: return "User Controls";
403 case V4L2_CID_BRIGHTNESS: return "Brightness";
404 case V4L2_CID_CONTRAST: return "Contrast";
405 case V4L2_CID_SATURATION: return "Saturation";
406 case V4L2_CID_HUE: return "Hue";
407 case V4L2_CID_AUDIO_VOLUME: return "Volume";
408 case V4L2_CID_AUDIO_BALANCE: return "Balance";
409 case V4L2_CID_AUDIO_BASS: return "Bass";
410 case V4L2_CID_AUDIO_TREBLE: return "Treble";
411 case V4L2_CID_AUDIO_MUTE: return "Mute";
412 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
413 case V4L2_CID_BLACK_LEVEL: return "Black Level";
414 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
415 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
416 case V4L2_CID_RED_BALANCE: return "Red Balance";
417 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
418 case V4L2_CID_GAMMA: return "Gamma";
419 case V4L2_CID_EXPOSURE: return "Exposure";
420 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
421 case V4L2_CID_GAIN: return "Gain";
422 case V4L2_CID_HFLIP: return "Horizontal Flip";
423 case V4L2_CID_VFLIP: return "Vertical Flip";
424 case V4L2_CID_HCENTER: return "Horizontal Center";
425 case V4L2_CID_VCENTER: return "Vertical Center";
426 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
427 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
428 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
429 case V4L2_CID_SHARPNESS: return "Sharpness";
430 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
431 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
432 case V4L2_CID_COLOR_KILLER: return "Color Killer";
433 case V4L2_CID_COLORFX: return "Color Effects";
434 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
435 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
436 case V4L2_CID_ROTATE: return "Rotate";
437 case V4L2_CID_BG_COLOR: return "Background Color";
438
439 /* MPEG controls */
440 case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
441 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
442 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
443 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
444 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
445 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
446 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
447 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
448 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
449 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
450 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
451 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
452 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
453 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
454 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
455 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
456 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
457 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
458 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
459 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
460 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
461 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
462 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
463 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
464 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
465 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
466 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
467 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
468 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
469 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
470 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
471 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
472 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
473
474 /* CAMERA controls */
475 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
476 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
477 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
478 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
479 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
480 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
481 case V4L2_CID_PAN_RESET: return "Pan, Reset";
482 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
483 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
484 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
485 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
486 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
487 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic";
488 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
489 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
490 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
491 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
492 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
493 case V4L2_CID_PRIVACY: return "Privacy";
494
495 /* FM Radio Modulator control */
496 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
497 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
498 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
499 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
500 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
501 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
502 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
503 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
504 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
505 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Feature Enabled";
506 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
507 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
508 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
509 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
510 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
511 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
512 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
513 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-emphasis settings";
514 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
515 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
516
517 default:
518 return NULL;
519 }
520 }
521 EXPORT_SYMBOL(v4l2_ctrl_get_name);
522
523 /* Fill in a struct v4l2_queryctrl */
524 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
525 {
526 const char *name = v4l2_ctrl_get_name(qctrl->id);
527
528 qctrl->flags = 0;
529 if (name == NULL)
530 return -EINVAL;
531
532 switch (qctrl->id) {
533 case V4L2_CID_AUDIO_MUTE:
534 case V4L2_CID_AUDIO_LOUDNESS:
535 case V4L2_CID_AUTO_WHITE_BALANCE:
536 case V4L2_CID_AUTOGAIN:
537 case V4L2_CID_HFLIP:
538 case V4L2_CID_VFLIP:
539 case V4L2_CID_HUE_AUTO:
540 case V4L2_CID_CHROMA_AGC:
541 case V4L2_CID_COLOR_KILLER:
542 case V4L2_CID_MPEG_AUDIO_MUTE:
543 case V4L2_CID_MPEG_VIDEO_MUTE:
544 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
545 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
546 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
547 case V4L2_CID_FOCUS_AUTO:
548 case V4L2_CID_PRIVACY:
549 case V4L2_CID_AUDIO_LIMITER_ENABLED:
550 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
551 case V4L2_CID_PILOT_TONE_ENABLED:
552 qctrl->type = V4L2_CTRL_TYPE_BOOLEAN;
553 min = 0;
554 max = step = 1;
555 break;
556 case V4L2_CID_PAN_RESET:
557 case V4L2_CID_TILT_RESET:
558 qctrl->type = V4L2_CTRL_TYPE_BUTTON;
559 qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
560 min = max = step = def = 0;
561 break;
562 case V4L2_CID_POWER_LINE_FREQUENCY:
563 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
564 case V4L2_CID_MPEG_AUDIO_ENCODING:
565 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
566 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
567 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
568 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
569 case V4L2_CID_MPEG_AUDIO_MODE:
570 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
571 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
572 case V4L2_CID_MPEG_AUDIO_CRC:
573 case V4L2_CID_MPEG_VIDEO_ENCODING:
574 case V4L2_CID_MPEG_VIDEO_ASPECT:
575 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
576 case V4L2_CID_MPEG_STREAM_TYPE:
577 case V4L2_CID_MPEG_STREAM_VBI_FMT:
578 case V4L2_CID_EXPOSURE_AUTO:
579 case V4L2_CID_COLORFX:
580 case V4L2_CID_TUNE_PREEMPHASIS:
581 qctrl->type = V4L2_CTRL_TYPE_MENU;
582 step = 1;
583 break;
584 case V4L2_CID_RDS_TX_PS_NAME:
585 case V4L2_CID_RDS_TX_RADIO_TEXT:
586 qctrl->type = V4L2_CTRL_TYPE_STRING;
587 break;
588 case V4L2_CID_USER_CLASS:
589 case V4L2_CID_CAMERA_CLASS:
590 case V4L2_CID_MPEG_CLASS:
591 case V4L2_CID_FM_TX_CLASS:
592 qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
593 qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
594 min = max = step = def = 0;
595 break;
596 case V4L2_CID_BG_COLOR:
597 qctrl->type = V4L2_CTRL_TYPE_INTEGER;
598 step = 1;
599 min = 0;
600 /* Max is calculated as RGB888 that is 2^24 */
601 max = 0xFFFFFF;
602 break;
603 default:
604 qctrl->type = V4L2_CTRL_TYPE_INTEGER;
605 break;
606 }
607 switch (qctrl->id) {
608 case V4L2_CID_MPEG_AUDIO_ENCODING:
609 case V4L2_CID_MPEG_AUDIO_MODE:
610 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
611 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
612 case V4L2_CID_MPEG_STREAM_TYPE:
613 qctrl->flags |= V4L2_CTRL_FLAG_UPDATE;
614 break;
615 case V4L2_CID_AUDIO_VOLUME:
616 case V4L2_CID_AUDIO_BALANCE:
617 case V4L2_CID_AUDIO_BASS:
618 case V4L2_CID_AUDIO_TREBLE:
619 case V4L2_CID_BRIGHTNESS:
620 case V4L2_CID_CONTRAST:
621 case V4L2_CID_SATURATION:
622 case V4L2_CID_HUE:
623 case V4L2_CID_RED_BALANCE:
624 case V4L2_CID_BLUE_BALANCE:
625 case V4L2_CID_GAMMA:
626 case V4L2_CID_SHARPNESS:
627 case V4L2_CID_RDS_TX_DEVIATION:
628 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
629 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
630 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
631 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
632 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
633 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
634 case V4L2_CID_PILOT_TONE_DEVIATION:
635 case V4L2_CID_PILOT_TONE_FREQUENCY:
636 case V4L2_CID_TUNE_POWER_LEVEL:
637 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
638 qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
639 break;
640 case V4L2_CID_PAN_RELATIVE:
641 case V4L2_CID_TILT_RELATIVE:
642 case V4L2_CID_FOCUS_RELATIVE:
643 case V4L2_CID_IRIS_RELATIVE:
644 case V4L2_CID_ZOOM_RELATIVE:
645 qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
646 break;
647 }
648 qctrl->minimum = min;
649 qctrl->maximum = max;
650 qctrl->step = step;
651 qctrl->default_value = def;
652 qctrl->reserved[0] = qctrl->reserved[1] = 0;
653 strlcpy(qctrl->name, name, sizeof(qctrl->name));
654 return 0;
655 }
656 EXPORT_SYMBOL(v4l2_ctrl_query_fill);
657
658 /* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and
659 the menu. The qctrl pointer may be NULL, in which case it is ignored.
660 If menu_items is NULL, then the menu items are retrieved using
661 v4l2_ctrl_get_menu. */
662 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl,
663 const char **menu_items)
664 {
665 int i;
666
667 qmenu->reserved = 0;
668 if (menu_items == NULL)
669 menu_items = v4l2_ctrl_get_menu(qmenu->id);
670 if (menu_items == NULL ||
671 (qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum)))
672 return -EINVAL;
673 for (i = 0; i < qmenu->index && menu_items[i]; i++) ;
674 if (menu_items[i] == NULL || menu_items[i][0] == '\0')
675 return -EINVAL;
676 strlcpy(qmenu->name, menu_items[qmenu->index], sizeof(qmenu->name));
677 return 0;
678 }
679 EXPORT_SYMBOL(v4l2_ctrl_query_menu);
680
681 /* Fill in a struct v4l2_querymenu based on the specified array of valid
682 menu items (terminated by V4L2_CTRL_MENU_IDS_END).
683 Use this if there are 'holes' in the list of valid menu items. */
684 int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids)
685 {
686 const char **menu_items = v4l2_ctrl_get_menu(qmenu->id);
687
688 qmenu->reserved = 0;
689 if (menu_items == NULL || ids == NULL)
690 return -EINVAL;
691 while (*ids != V4L2_CTRL_MENU_IDS_END) {
692 if (*ids++ == qmenu->index) {
693 strlcpy(qmenu->name, menu_items[qmenu->index],
694 sizeof(qmenu->name));
695 return 0;
696 }
697 }
698 return -EINVAL;
699 }
700 EXPORT_SYMBOL(v4l2_ctrl_query_menu_valid_items);
701
702 /* ctrl_classes points to an array of u32 pointers, the last element is
703 a NULL pointer. Each u32 array is a 0-terminated array of control IDs.
704 Each array must be sorted low to high and belong to the same control
705 class. The array of u32 pointers must also be sorted, from low class IDs
706 to high class IDs.
707
708 This function returns the first ID that follows after the given ID.
709 When no more controls are available 0 is returned. */
710 u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
711 {
712 u32 ctrl_class = V4L2_CTRL_ID2CLASS(id);
713 const u32 *pctrl;
714
715 if (ctrl_classes == NULL)
716 return 0;
717
718 /* if no query is desired, then check if the ID is part of ctrl_classes */
719 if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) {
720 /* find class */
721 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class)
722 ctrl_classes++;
723 if (*ctrl_classes == NULL)
724 return 0;
725 pctrl = *ctrl_classes;
726 /* find control ID */
727 while (*pctrl && *pctrl != id) pctrl++;
728 return *pctrl ? id : 0;
729 }
730 id &= V4L2_CTRL_ID_MASK;
731 id++; /* select next control */
732 /* find first class that matches (or is greater than) the class of
733 the ID */
734 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class)
735 ctrl_classes++;
736 /* no more classes */
737 if (*ctrl_classes == NULL)
738 return 0;
739 pctrl = *ctrl_classes;
740 /* find first ctrl within the class that is >= ID */
741 while (*pctrl && *pctrl < id) pctrl++;
742 if (*pctrl)
743 return *pctrl;
744 /* we are at the end of the controls of the current class. */
745 /* continue with next class if available */
746 ctrl_classes++;
747 if (*ctrl_classes == NULL)
748 return 0;
749 return **ctrl_classes;
750 }
751 EXPORT_SYMBOL(v4l2_ctrl_next);
752
753 int v4l2_chip_match_host(const struct v4l2_dbg_match *match)
754 {
755 switch (match->type) {
756 case V4L2_CHIP_MATCH_HOST:
757 return match->addr == 0;
758 default:
759 return 0;
760 }
761 }
762 EXPORT_SYMBOL(v4l2_chip_match_host);
763
764 #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
765 int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match)
766 {
767 int len;
768
769 if (c == NULL || match == NULL)
770 return 0;
771
772 switch (match->type) {
773 case V4L2_CHIP_MATCH_I2C_DRIVER:
774 if (c->driver == NULL || c->driver->driver.name == NULL)
775 return 0;
776 len = strlen(c->driver->driver.name);
777 /* legacy drivers have a ' suffix, don't try to match that */
778 if (len && c->driver->driver.name[len - 1] == '\'')
779 len--;
780 return len && !strncmp(c->driver->driver.name, match->name, len);
781 case V4L2_CHIP_MATCH_I2C_ADDR:
782 return c->addr == match->addr;
783 default:
784 return 0;
785 }
786 }
787 EXPORT_SYMBOL(v4l2_chip_match_i2c_client);
788
789 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_dbg_chip_ident *chip,
790 u32 ident, u32 revision)
791 {
792 if (!v4l2_chip_match_i2c_client(c, &chip->match))
793 return 0;
794 if (chip->ident == V4L2_IDENT_NONE) {
795 chip->ident = ident;
796 chip->revision = revision;
797 }
798 else {
799 chip->ident = V4L2_IDENT_AMBIGUOUS;
800 chip->revision = 0;
801 }
802 return 0;
803 }
804 EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
805
806 /* ----------------------------------------------------------------- */
807
808 /* I2C Helper functions */
809
810
811 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
812 const struct v4l2_subdev_ops *ops)
813 {
814 v4l2_subdev_init(sd, ops);
815 sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
816 /* the owner is the same as the i2c_client's driver owner */
817 sd->owner = client->driver->driver.owner;
818 /* i2c_client and v4l2_subdev point to one another */
819 v4l2_set_subdevdata(sd, client);
820 i2c_set_clientdata(client, sd);
821 /* initialize name */
822 snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
823 client->driver->driver.name, i2c_adapter_id(client->adapter),
824 client->addr);
825 }
826 EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
827
828
829
830 /* Load an i2c sub-device. */
831 struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
832 struct i2c_adapter *adapter, const char *module_name,
833 struct i2c_board_info *info, const unsigned short *probe_addrs)
834 {
835 struct v4l2_subdev *sd = NULL;
836 struct i2c_client *client;
837
838 BUG_ON(!v4l2_dev);
839
840 if (module_name)
841 request_module(module_name);
842
843 /* Create the i2c client */
844 if (info->addr == 0 && probe_addrs)
845 client = i2c_new_probed_device(adapter, info, probe_addrs);
846 else
847 client = i2c_new_device(adapter, info);
848
849 /* Note: by loading the module first we are certain that c->driver
850 will be set if the driver was found. If the module was not loaded
851 first, then the i2c core tries to delay-load the module for us,
852 and then c->driver is still NULL until the module is finally
853 loaded. This delay-load mechanism doesn't work if other drivers
854 want to use the i2c device, so explicitly loading the module
855 is the best alternative. */
856 if (client == NULL || client->driver == NULL)
857 goto error;
858
859 /* Lock the module so we can safely get the v4l2_subdev pointer */
860 if (!try_module_get(client->driver->driver.owner))
861 goto error;
862 sd = i2c_get_clientdata(client);
863
864 /* Register with the v4l2_device which increases the module's
865 use count as well. */
866 if (v4l2_device_register_subdev(v4l2_dev, sd))
867 sd = NULL;
868 /* Decrease the module use count to match the first try_module_get. */
869 module_put(client->driver->driver.owner);
870
871 if (sd) {
872 /* We return errors from v4l2_subdev_call only if we have the
873 callback as the .s_config is not mandatory */
874 int err = v4l2_subdev_call(sd, core, s_config,
875 info->irq, info->platform_data);
876
877 if (err && err != -ENOIOCTLCMD) {
878 v4l2_device_unregister_subdev(sd);
879 sd = NULL;
880 }
881 }
882
883 error:
884 /* If we have a client but no subdev, then something went wrong and
885 we must unregister the client. */
886 if (client && sd == NULL)
887 i2c_unregister_device(client);
888 return sd;
889 }
890 EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
891
892 struct v4l2_subdev *v4l2_i2c_new_subdev_cfg(struct v4l2_device *v4l2_dev,
893 struct i2c_adapter *adapter,
894 const char *module_name, const char *client_type,
895 int irq, void *platform_data,
896 u8 addr, const unsigned short *probe_addrs)
897 {
898 struct i2c_board_info info;
899
900 /* Setup the i2c board info with the device type and
901 the device address. */
902 memset(&info, 0, sizeof(info));
903 strlcpy(info.type, client_type, sizeof(info.type));
904 info.addr = addr;
905 info.irq = irq;
906 info.platform_data = platform_data;
907
908 return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, module_name,
909 &info, probe_addrs);
910 }
911 EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_cfg);
912
913 /* Return i2c client address of v4l2_subdev. */
914 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
915 {
916 struct i2c_client *client = v4l2_get_subdevdata(sd);
917
918 return client ? client->addr : I2C_CLIENT_END;
919 }
920 EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
921
922 /* Return a list of I2C tuner addresses to probe. Use only if the tuner
923 addresses are unknown. */
924 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
925 {
926 static const unsigned short radio_addrs[] = {
927 #if defined(CONFIG_MEDIA_TUNER_TEA5761) || defined(CONFIG_MEDIA_TUNER_TEA5761_MODULE)
928 0x10,
929 #endif
930 0x60,
931 I2C_CLIENT_END
932 };
933 static const unsigned short demod_addrs[] = {
934 0x42, 0x43, 0x4a, 0x4b,
935 I2C_CLIENT_END
936 };
937 static const unsigned short tv_addrs[] = {
938 0x42, 0x43, 0x4a, 0x4b, /* tda8290 */
939 0x60, 0x61, 0x62, 0x63, 0x64,
940 I2C_CLIENT_END
941 };
942
943 switch (type) {
944 case ADDRS_RADIO:
945 return radio_addrs;
946 case ADDRS_DEMOD:
947 return demod_addrs;
948 case ADDRS_TV:
949 return tv_addrs;
950 case ADDRS_TV_WITH_DEMOD:
951 return tv_addrs + 4;
952 }
953 return NULL;
954 }
955 EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
956
957 #endif /* defined(CONFIG_I2C) */
958
959 /* Clamp x to be between min and max, aligned to a multiple of 2^align. min
960 * and max don't have to be aligned, but there must be at least one valid
961 * value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples
962 * of 16 between 17 and 31. */
963 static unsigned int clamp_align(unsigned int x, unsigned int min,
964 unsigned int max, unsigned int align)
965 {
966 /* Bits that must be zero to be aligned */
967 unsigned int mask = ~((1 << align) - 1);
968
969 /* Round to nearest aligned value */
970 if (align)
971 x = (x + (1 << (align - 1))) & mask;
972
973 /* Clamp to aligned value of min and max */
974 if (x < min)
975 x = (min + ~mask) & mask;
976 else if (x > max)
977 x = max & mask;
978
979 return x;
980 }
981
982 /* Bound an image to have a width between wmin and wmax, and height between
983 * hmin and hmax, inclusive. Additionally, the width will be a multiple of
984 * 2^walign, the height will be a multiple of 2^halign, and the overall size
985 * (width*height) will be a multiple of 2^salign. The image may be shrunk
986 * or enlarged to fit the alignment constraints.
987 *
988 * The width or height maximum must not be smaller than the corresponding
989 * minimum. The alignments must not be so high there are no possible image
990 * sizes within the allowed bounds. wmin and hmin must be at least 1
991 * (don't use 0). If you don't care about a certain alignment, specify 0,
992 * as 2^0 is 1 and one byte alignment is equivalent to no alignment. If
993 * you only want to adjust downward, specify a maximum that's the same as
994 * the initial value.
995 */
996 void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
997 unsigned int walign,
998 u32 *h, unsigned int hmin, unsigned int hmax,
999 unsigned int halign, unsigned int salign)
1000 {
1001 *w = clamp_align(*w, wmin, wmax, walign);
1002 *h = clamp_align(*h, hmin, hmax, halign);
1003
1004 /* Usually we don't need to align the size and are done now. */
1005 if (!salign)
1006 return;
1007
1008 /* How much alignment do we have? */
1009 walign = __ffs(*w);
1010 halign = __ffs(*h);
1011 /* Enough to satisfy the image alignment? */
1012 if (walign + halign < salign) {
1013 /* Max walign where there is still a valid width */
1014 unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
1015 /* Max halign where there is still a valid height */
1016 unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
1017
1018 /* up the smaller alignment until we have enough */
1019 do {
1020 if (halign >= hmaxa ||
1021 (walign <= halign && walign < wmaxa)) {
1022 *w = clamp_align(*w, wmin, wmax, walign + 1);
1023 walign = __ffs(*w);
1024 } else {
1025 *h = clamp_align(*h, hmin, hmax, halign + 1);
1026 halign = __ffs(*h);
1027 }
1028 } while (halign + walign < salign);
1029 }
1030 }
1031 EXPORT_SYMBOL_GPL(v4l_bound_align_image);
Tomato firmware and modifications.