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[media] V4L: Add camera scene mode control
[mirror_ubuntu-artful-kernel.git] / drivers / media / video / v4l2-ctrls.c
CommitLineData
0996517c
HV		 1/*
2 V4L2 controls framework implementation.
3
4 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/ctype.h>
2b80163c 22#include <linux/slab.h>
35a24636 23#include <linux/export.h>
0996517c
HV		 24#include <media/v4l2-ioctl.h>
25#include <media/v4l2-device.h>
26#include <media/v4l2-ctrls.h>
6e239399 27#include <media/v4l2-event.h>
0996517c
HV		 28#include <media/v4l2-dev.h>
29
ddac5c10
HV		 30#define has_op(master, op) \
31 (master->ops && master->ops->op)
54c911eb 32#define call_op(master, op) \
ddac5c10 33 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 34
0996517c 35/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 36struct v4l2_ctrl_helper {
37 /* Pointer to the control reference of the master control */
38 struct v4l2_ctrl_ref *mref;
0996517c
HV		 39 /* The control corresponding to the v4l2_ext_control ID field. */
40 struct v4l2_ctrl *ctrl;
eb5b16ef
HV		 41 /* v4l2_ext_control index of the next control belonging to the
42 same cluster, or 0 if there isn't any. */
43 u32 next;
0996517c
HV		 44};
45
72d877ca 46/* Small helper function to determine if the autocluster is set to manual
88365105 47 mode. */
72d877ca
HV		 48static bool is_cur_manual(const struct v4l2_ctrl *master)
49{
50 return master->is_auto && master->cur.val == master->manual_mode_value;
51}
52
53/* Same as above, but this checks the against the new value instead of the
54 current value. */
55static bool is_new_manual(const struct v4l2_ctrl *master)
56{
57 return master->is_auto && master->val == master->manual_mode_value;
58}
59
0996517c
HV		 60/* Returns NULL or a character pointer array containing the menu for
61 the given control ID. The pointer array ends with a NULL pointer.
62 An empty string signifies a menu entry that is invalid. This allows
63 drivers to disable certain options if it is not supported. */
513521ea 64const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 65{
513521ea 66 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 67 "44.1 kHz",
68 "48 kHz",
69 "32 kHz",
70 NULL
71 };
513521ea 72 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 73 "MPEG-1/2 Layer I",
74 "MPEG-1/2 Layer II",
75 "MPEG-1/2 Layer III",
76 "MPEG-2/4 AAC",
77 "AC-3",
78 NULL
79 };
513521ea 80 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 81 "32 kbps",
82 "64 kbps",
83 "96 kbps",
84 "128 kbps",
85 "160 kbps",
86 "192 kbps",
87 "224 kbps",
88 "256 kbps",
89 "288 kbps",
90 "320 kbps",
91 "352 kbps",
92 "384 kbps",
93 "416 kbps",
94 "448 kbps",
95 NULL
96 };
513521ea 97 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 98 "32 kbps",
99 "48 kbps",
100 "56 kbps",
101 "64 kbps",
102 "80 kbps",
103 "96 kbps",
104 "112 kbps",
105 "128 kbps",
106 "160 kbps",
107 "192 kbps",
108 "224 kbps",
109 "256 kbps",
110 "320 kbps",
111 "384 kbps",
112 NULL
113 };
513521ea 114 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 115 "32 kbps",
116 "40 kbps",
117 "48 kbps",
118 "56 kbps",
119 "64 kbps",
120 "80 kbps",
121 "96 kbps",
122 "112 kbps",
123 "128 kbps",
124 "160 kbps",
125 "192 kbps",
126 "224 kbps",
127 "256 kbps",
128 "320 kbps",
129 NULL
130 };
513521ea 131 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 132 "32 kbps",
133 "40 kbps",
134 "48 kbps",
135 "56 kbps",
136 "64 kbps",
137 "80 kbps",
138 "96 kbps",
139 "112 kbps",
140 "128 kbps",
141 "160 kbps",
142 "192 kbps",
143 "224 kbps",
144 "256 kbps",
145 "320 kbps",
146 "384 kbps",
147 "448 kbps",
148 "512 kbps",
149 "576 kbps",
150 "640 kbps",
151 NULL
152 };
513521ea 153 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 154 "Stereo",
155 "Joint Stereo",
156 "Dual",
157 "Mono",
158 NULL
159 };
513521ea 160 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 161 "Bound 4",
162 "Bound 8",
163 "Bound 12",
164 "Bound 16",
165 NULL
166 };
513521ea 167 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 168 "No Emphasis",
169 "50/15 us",
170 "CCITT J17",
171 NULL
172 };
513521ea 173 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 174 "No CRC",
175 "16-bit CRC",
176 NULL
177 };
24c19a21
HV		 178 static const char * const mpeg_audio_dec_playback[] = {
179 "Auto",
180 "Stereo",
181 "Left",
182 "Right",
183 "Mono",
184 "Swapped Stereo",
185 NULL
186 };
513521ea 187 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 188 "MPEG-1",
189 "MPEG-2",
190 "MPEG-4 AVC",
191 NULL
192 };
513521ea 193 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 194 "1x1",
195 "4x3",
196 "16x9",
197 "2.21x1",
198 NULL
199 };
513521ea 200 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 201 "Variable Bitrate",
202 "Constant Bitrate",
203 NULL
204 };
513521ea 205 static const char * const mpeg_stream_type[] = {
0996517c
HV		 206 "MPEG-2 Program Stream",
207 "MPEG-2 Transport Stream",
208 "MPEG-1 System Stream",
209 "MPEG-2 DVD-compatible Stream",
210 "MPEG-1 VCD-compatible Stream",
211 "MPEG-2 SVCD-compatible Stream",
212 NULL
213 };
513521ea 214 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 215 "No VBI",
064f5096 216 "Private Packet, IVTV Format",
0996517c
HV		 217 NULL
218 };
513521ea 219 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 220 "Disabled",
221 "50 Hz",
222 "60 Hz",
d26a6635 223 "Auto",
0996517c
HV		 224 NULL
225 };
513521ea 226 static const char * const camera_exposure_auto[] = {
0996517c
HV		 227 "Auto Mode",
228 "Manual Mode",
229 "Shutter Priority Mode",
230 "Aperture Priority Mode",
231 NULL
232 };
cf072139
SN		 233 static const char * const camera_exposure_metering[] = {
234 "Average",
235 "Center Weighted",
236 "Spot",
237 NULL
238 };
513521ea 239 static const char * const colorfx[] = {
0996517c
HV		 240 "None",
241 "Black & White",
242 "Sepia",
243 "Negative",
244 "Emboss",
245 "Sketch",
064f5096
KD		 246 "Sky Blue",
247 "Grass Green",
248 "Skin Whiten",
0996517c 249 "Vivid",
6491d1ad
SN		 250 "Aqua",
251 "Art Freeze",
252 "Silhouette",
253 "Solarization",
254 "Antique",
255 "Set Cb/Cr",
0996517c
HV		 256 NULL
257 };
e40a0573
SN		 258 static const char * const auto_n_preset_white_balance[] = {
259 "Manual",
260 "Auto",
261 "Incandescent",
262 "Fluorescent",
263 "Fluorescent H",
264 "Horizon",
265 "Daylight",
266 "Flash",
267 "Cloudy",
268 "Shade",
269 NULL,
270 };
7f84ad8b
SN		 271 static const char * const camera_iso_sensitivity_auto[] = {
272 "Manual",
273 "Auto",
274 NULL
275 };
0bf6b7dc
SN		 276 static const char * const scene_mode[] = {
277 "None",
278 "Backlight",
279 "Beach/Snow",
280 "Candle Light",
281 "Dusk/Dawn",
282 "Fall Colors",
283 "Fireworks",
284 "Landscape",
285 "Night",
286 "Party/Indoor",
287 "Portrait",
288 "Sports",
289 "Sunset",
290 "Text",
291 NULL
292 };
513521ea 293 static const char * const tune_preemphasis[] = {
064f5096 294 "No Preemphasis",
f769c260
HV		 295 "50 Microseconds",
296 "75 Microseconds",
0996517c
HV		 297 NULL,
298 };
064f5096
KD		 299 static const char * const header_mode[] = {
300 "Separate Buffer",
301 "Joined With 1st Frame",
302 NULL,
303 };
304 static const char * const multi_slice[] = {
305 "Single",
306 "Max Macroblocks",
307 "Max Bytes",
308 NULL,
309 };
310 static const char * const entropy_mode[] = {
311 "CAVLC",
312 "CABAC",
313 NULL,
314 };
315 static const char * const mpeg_h264_level[] = {
316 "1",
317 "1b",
318 "1.1",
319 "1.2",
320 "1.3",
321 "2",
322 "2.1",
323 "2.2",
324 "3",
325 "3.1",
326 "3.2",
327 "4",
328 "4.1",
329 "4.2",
330 "5",
331 "5.1",
332 NULL,
333 };
334 static const char * const h264_loop_filter[] = {
335 "Enabled",
336 "Disabled",
337 "Disabled at Slice Boundary",
338 NULL,
339 };
340 static const char * const h264_profile[] = {
341 "Baseline",
342 "Constrained Baseline",
343 "Main",
344 "Extended",
345 "High",
346 "High 10",
347 "High 422",
348 "High 444 Predictive",
349 "High 10 Intra",
350 "High 422 Intra",
351 "High 444 Intra",
352 "CAVLC 444 Intra",
353 "Scalable Baseline",
354 "Scalable High",
355 "Scalable High Intra",
356 "Multiview High",
357 NULL,
358 };
359 static const char * const vui_sar_idc[] = {
360 "Unspecified",
361 "1:1",
362 "12:11",
363 "10:11",
364 "16:11",
365 "40:33",
366 "24:11",
367 "20:11",
368 "32:11",
369 "80:33",
370 "18:11",
371 "15:11",
372 "64:33",
373 "160:99",
374 "4:3",
375 "3:2",
376 "2:1",
377 "Extended SAR",
378 NULL,
379 };
380 static const char * const mpeg_mpeg4_level[] = {
381 "0",
382 "0b",
383 "1",
384 "2",
385 "3",
386 "3b",
387 "4",
388 "5",
389 NULL,
390 };
391 static const char * const mpeg4_profile[] = {
392 "Simple",
f769c260 393 "Advanced Simple",
064f5096
KD		 394 "Core",
395 "Simple Scalable",
396 "Advanced Coding Efficency",
397 NULL,
398 };
399
0b159acd
SA		 400 static const char * const flash_led_mode[] = {
401 "Off",
402 "Flash",
403 "Torch",
404 NULL,
405 };
406 static const char * const flash_strobe_source[] = {
407 "Software",
408 "External",
409 NULL,
410 };
0996517c 411
c7361ae1
SN		 412 static const char * const jpeg_chroma_subsampling[] = {
413 "4:4:4",
414 "4:2:2",
415 "4:2:0",
416 "4:1:1",
417 "4:1:0",
418 "Gray",
419 NULL,
420 };
421
0996517c
HV		 422 switch (id) {
423 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
424 return mpeg_audio_sampling_freq;
425 case V4L2_CID_MPEG_AUDIO_ENCODING:
426 return mpeg_audio_encoding;
427 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
428 return mpeg_audio_l1_bitrate;
429 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
430 return mpeg_audio_l2_bitrate;
431 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
432 return mpeg_audio_l3_bitrate;
433 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
434 return mpeg_audio_ac3_bitrate;
435 case V4L2_CID_MPEG_AUDIO_MODE:
436 return mpeg_audio_mode;
437 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
438 return mpeg_audio_mode_extension;
439 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
440 return mpeg_audio_emphasis;
441 case V4L2_CID_MPEG_AUDIO_CRC:
442 return mpeg_audio_crc;
24c19a21
HV		 443 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
444 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
445 return mpeg_audio_dec_playback;
0996517c
HV		 446 case V4L2_CID_MPEG_VIDEO_ENCODING:
447 return mpeg_video_encoding;
448 case V4L2_CID_MPEG_VIDEO_ASPECT:
449 return mpeg_video_aspect;
450 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
451 return mpeg_video_bitrate_mode;
452 case V4L2_CID_MPEG_STREAM_TYPE:
453 return mpeg_stream_type;
454 case V4L2_CID_MPEG_STREAM_VBI_FMT:
455 return mpeg_stream_vbi_fmt;
456 case V4L2_CID_POWER_LINE_FREQUENCY:
457 return camera_power_line_frequency;
458 case V4L2_CID_EXPOSURE_AUTO:
459 return camera_exposure_auto;
cf072139
SN		 460 case V4L2_CID_EXPOSURE_METERING:
461 return camera_exposure_metering;
0996517c
HV		 462 case V4L2_CID_COLORFX:
463 return colorfx;
e40a0573
SN		 464 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
465 return auto_n_preset_white_balance;
7f84ad8b
SN		 466 case V4L2_CID_ISO_SENSITIVITY_AUTO:
467 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 468 case V4L2_CID_SCENE_MODE:
469 return scene_mode;
0996517c
HV		 470 case V4L2_CID_TUNE_PREEMPHASIS:
471 return tune_preemphasis;
0b159acd
SA		 472 case V4L2_CID_FLASH_LED_MODE:
473 return flash_led_mode;
474 case V4L2_CID_FLASH_STROBE_SOURCE:
475 return flash_strobe_source;
064f5096
KD		 476 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
477 return header_mode;
478 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
479 return multi_slice;
480 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
481 return entropy_mode;
482 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
483 return mpeg_h264_level;
484 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
485 return h264_loop_filter;
486 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
487 return h264_profile;
488 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
489 return vui_sar_idc;
490 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
491 return mpeg_mpeg4_level;
492 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
493 return mpeg4_profile;
c7361ae1
SN		 494 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
495 return jpeg_chroma_subsampling;
496
0996517c
HV		 497 default:
498 return NULL;
499 }
500}
501EXPORT_SYMBOL(v4l2_ctrl_get_menu);
502
503/* Return the control name. */
504const char *v4l2_ctrl_get_name(u32 id)
505{
506 switch (id) {
507 /* USER controls */
6c8d6111 508 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 509 case V4L2_CID_USER_CLASS: return "User Controls";
510 case V4L2_CID_BRIGHTNESS: return "Brightness";
511 case V4L2_CID_CONTRAST: return "Contrast";
512 case V4L2_CID_SATURATION: return "Saturation";
513 case V4L2_CID_HUE: return "Hue";
514 case V4L2_CID_AUDIO_VOLUME: return "Volume";
515 case V4L2_CID_AUDIO_BALANCE: return "Balance";
516 case V4L2_CID_AUDIO_BASS: return "Bass";
517 case V4L2_CID_AUDIO_TREBLE: return "Treble";
518 case V4L2_CID_AUDIO_MUTE: return "Mute";
519 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 520 case V4L2_CID_BLACK_LEVEL: return "Black Level";
521 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
522 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
523 case V4L2_CID_RED_BALANCE: return "Red Balance";
524 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
525 case V4L2_CID_GAMMA: return "Gamma";
526 case V4L2_CID_EXPOSURE: return "Exposure";
527 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
528 case V4L2_CID_GAIN: return "Gain";
529 case V4L2_CID_HFLIP: return "Horizontal Flip";
530 case V4L2_CID_VFLIP: return "Vertical Flip";
531 case V4L2_CID_HCENTER: return "Horizontal Center";
532 case V4L2_CID_VCENTER: return "Vertical Center";
533 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
534 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
535 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
536 case V4L2_CID_SHARPNESS: return "Sharpness";
537 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
538 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 539 case V4L2_CID_COLOR_KILLER: return "Color Killer";
540 case V4L2_CID_COLORFX: return "Color Effects";
541 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
542 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
543 case V4L2_CID_ROTATE: return "Rotate";
544 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 545 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 546 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
547 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 548 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
549 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 550 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 551 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c
HV		 552
553 /* MPEG controls */
6c8d6111 554 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 555 case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
556 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
557 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
558 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
559 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
560 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 561 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
562 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
563 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 564 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 565 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
566 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
567 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
568 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
569 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 570 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 571 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
572 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
573 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
574 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
575 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 576 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
577 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 578 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
579 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
580 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
581 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
582 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
583 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
584 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
585 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
586 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 587 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 588 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 589 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 590 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
591 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 592 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 593 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
594 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
595 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 596 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 597 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 598 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
599 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 600 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
601 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
602 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 603 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
604 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 605 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
606 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
607 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
608 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 609 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
610 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 611 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
612 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
613 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
614 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
615 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
616 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
617 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
618 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
619 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
620 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 621 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
622 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 623 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
624 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
625 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
626 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
627 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 628 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
629 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
630 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 631 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 632 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
633 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
0996517c
HV		 634
635 /* CAMERA controls */
6c8d6111 636 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 637 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
638 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
639 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
640 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
641 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
642 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
643 case V4L2_CID_PAN_RESET: return "Pan, Reset";
644 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
645 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
646 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
647 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
648 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
649 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic";
0996517c
HV		 650 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
651 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
652 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
653 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 654 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
655 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 656 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 657 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 658 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 659 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 660 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
661 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 662 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 663 case V4L2_CID_SCENE_MODE: return "Scene Mode";
0996517c
HV		 664
665 /* FM Radio Modulator control */
6c8d6111 666 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 667 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
668 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
669 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
670 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
671 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
672 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
673 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
674 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
675 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 676 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 677 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
678 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
679 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
680 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
681 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
682 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
683 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 684 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 685 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
686 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
687
0b159acd 688 /* Flash controls */
f08aacf8
HV		 689 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
690 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
691 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 692 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 693 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
694 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
695 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
696 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
697 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
698 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 699 case V4L2_CID_FLASH_FAULT: return "Faults";
700 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 701 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 702
c7361ae1
SN		 703 /* JPEG encoder controls */
704 /* Keep the order of the 'case's the same as in videodev2.h! */
705 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
706 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
707 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
708 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
709 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
710
8c9d236e
SA		 711 /* Image source controls */
712 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
713 case V4L2_CID_VBLANK: return "Vertical Blanking";
714 case V4L2_CID_HBLANK: return "Horizontal Blanking";
715 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
716
c643ee13
SA		 717 /* Image processing controls */
718 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
719 case V4L2_CID_LINK_FREQ: return "Link Frequency";
720 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
721
0996517c
HV		 722 default:
723 return NULL;
724 }
725}
726EXPORT_SYMBOL(v4l2_ctrl_get_name);
727
728void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
729 s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags)
730{
731 *name = v4l2_ctrl_get_name(id);
732 *flags = 0;
733
734 switch (id) {
735 case V4L2_CID_AUDIO_MUTE:
736 case V4L2_CID_AUDIO_LOUDNESS:
737 case V4L2_CID_AUTO_WHITE_BALANCE:
738 case V4L2_CID_AUTOGAIN:
739 case V4L2_CID_HFLIP:
740 case V4L2_CID_VFLIP:
741 case V4L2_CID_HUE_AUTO:
742 case V4L2_CID_CHROMA_AGC:
743 case V4L2_CID_COLOR_KILLER:
744 case V4L2_CID_MPEG_AUDIO_MUTE:
745 case V4L2_CID_MPEG_VIDEO_MUTE:
746 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
747 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
748 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
749 case V4L2_CID_FOCUS_AUTO:
750 case V4L2_CID_PRIVACY:
751 case V4L2_CID_AUDIO_LIMITER_ENABLED:
752 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
753 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 754 case V4L2_CID_ILLUMINATORS_1:
755 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 756 case V4L2_CID_FLASH_STROBE_STATUS:
757 case V4L2_CID_FLASH_CHARGE:
758 case V4L2_CID_FLASH_READY:
064f5096
KD		 759 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
760 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
761 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
762 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
763 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
764 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
765 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
44d44a1a 766 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 767 case V4L2_CID_IMAGE_STABILIZATION:
0996517c
HV		 768 *type = V4L2_CTRL_TYPE_BOOLEAN;
769 *min = 0;
770 *max = *step = 1;
771 break;
772 case V4L2_CID_PAN_RESET:
773 case V4L2_CID_TILT_RESET:
0b159acd
SA		 774 case V4L2_CID_FLASH_STROBE:
775 case V4L2_CID_FLASH_STROBE_STOP:
0996517c
HV		 776 *type = V4L2_CTRL_TYPE_BUTTON;
777 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
778 *min = *max = *step = *def = 0;
779 break;
780 case V4L2_CID_POWER_LINE_FREQUENCY:
781 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
782 case V4L2_CID_MPEG_AUDIO_ENCODING:
783 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
784 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
785 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
786 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
787 case V4L2_CID_MPEG_AUDIO_MODE:
788 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
789 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
790 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 791 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
792 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 793 case V4L2_CID_MPEG_VIDEO_ENCODING:
794 case V4L2_CID_MPEG_VIDEO_ASPECT:
795 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
796 case V4L2_CID_MPEG_STREAM_TYPE:
797 case V4L2_CID_MPEG_STREAM_VBI_FMT:
798 case V4L2_CID_EXPOSURE_AUTO:
799 case V4L2_CID_COLORFX:
e40a0573 800 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 801 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 802 case V4L2_CID_FLASH_LED_MODE:
803 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 804 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
805 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
806 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
807 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
808 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
809 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
810 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
811 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
812 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 813 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 814 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 815 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 816 case V4L2_CID_SCENE_MODE:
0996517c
HV		 817 *type = V4L2_CTRL_TYPE_MENU;
818 break;
c643ee13
SA		 819 case V4L2_CID_LINK_FREQ:
820 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
821 break;
0996517c
HV		 822 case V4L2_CID_RDS_TX_PS_NAME:
823 case V4L2_CID_RDS_TX_RADIO_TEXT:
824 *type = V4L2_CTRL_TYPE_STRING;
825 break;
7f84ad8b 826 case V4L2_CID_ISO_SENSITIVITY:
d58083c9
SN		 827 case V4L2_CID_AUTO_EXPOSURE_BIAS:
828 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
829 break;
0996517c
HV		 830 case V4L2_CID_USER_CLASS:
831 case V4L2_CID_CAMERA_CLASS:
832 case V4L2_CID_MPEG_CLASS:
833 case V4L2_CID_FM_TX_CLASS:
0b159acd 834 case V4L2_CID_FLASH_CLASS:
c7361ae1 835 case V4L2_CID_JPEG_CLASS:
8c9d236e 836 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 837 case V4L2_CID_IMAGE_PROC_CLASS:
0996517c
HV		 838 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
839 /* You can neither read not write these */
840 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
841 *min = *max = *step = *def = 0;
842 break;
843 case V4L2_CID_BG_COLOR:
844 *type = V4L2_CTRL_TYPE_INTEGER;
845 *step = 1;
846 *min = 0;
847 /* Max is calculated as RGB888 that is 2^24 */
848 *max = 0xFFFFFF;
849 break;
0b159acd 850 case V4L2_CID_FLASH_FAULT:
c7361ae1 851 case V4L2_CID_JPEG_ACTIVE_MARKER:
0b159acd
SA		 852 *type = V4L2_CTRL_TYPE_BITMASK;
853 break;
064f5096
KD		 854 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
855 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
856 *type = V4L2_CTRL_TYPE_INTEGER;
857 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
858 break;
24c19a21
HV		 859 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
860 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
c643ee13
SA		 861 *flags |= V4L2_CTRL_FLAG_VOLATILE;
862 /* Fall through */
863 case V4L2_CID_PIXEL_RATE:
24c19a21 864 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 865 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
ca576811 866 *min = *max = *step = *def = 0;
24c19a21 867 break;
0996517c
HV		 868 default:
869 *type = V4L2_CTRL_TYPE_INTEGER;
870 break;
871 }
872 switch (id) {
873 case V4L2_CID_MPEG_AUDIO_ENCODING:
874 case V4L2_CID_MPEG_AUDIO_MODE:
875 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
876 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
877 case V4L2_CID_MPEG_STREAM_TYPE:
878 *flags |= V4L2_CTRL_FLAG_UPDATE;
879 break;
880 case V4L2_CID_AUDIO_VOLUME:
881 case V4L2_CID_AUDIO_BALANCE:
882 case V4L2_CID_AUDIO_BASS:
883 case V4L2_CID_AUDIO_TREBLE:
884 case V4L2_CID_BRIGHTNESS:
885 case V4L2_CID_CONTRAST:
886 case V4L2_CID_SATURATION:
887 case V4L2_CID_HUE:
888 case V4L2_CID_RED_BALANCE:
889 case V4L2_CID_BLUE_BALANCE:
890 case V4L2_CID_GAMMA:
891 case V4L2_CID_SHARPNESS:
892 case V4L2_CID_CHROMA_GAIN:
893 case V4L2_CID_RDS_TX_DEVIATION:
894 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
895 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
896 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
897 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
898 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
899 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
900 case V4L2_CID_PILOT_TONE_DEVIATION:
901 case V4L2_CID_PILOT_TONE_FREQUENCY:
902 case V4L2_CID_TUNE_POWER_LEVEL:
903 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
904 *flags |= V4L2_CTRL_FLAG_SLIDER;
905 break;
906 case V4L2_CID_PAN_RELATIVE:
907 case V4L2_CID_TILT_RELATIVE:
908 case V4L2_CID_FOCUS_RELATIVE:
909 case V4L2_CID_IRIS_RELATIVE:
910 case V4L2_CID_ZOOM_RELATIVE:
911 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
912 break;
0b159acd
SA		 913 case V4L2_CID_FLASH_STROBE_STATUS:
914 case V4L2_CID_FLASH_READY:
915 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
916 break;
0996517c
HV		 917 }
918}
919EXPORT_SYMBOL(v4l2_ctrl_fill);
920
921/* Helper function to determine whether the control type is compatible with
922 VIDIOC_G/S_CTRL. */
923static bool type_is_int(const struct v4l2_ctrl *ctrl)
924{
925 switch (ctrl->type) {
926 case V4L2_CTRL_TYPE_INTEGER64:
927 case V4L2_CTRL_TYPE_STRING:
928 /* Nope, these need v4l2_ext_control */
929 return false;
930 default:
931 return true;
932 }
933}
934
6e239399
HV		 935static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
936{
937 memset(ev->reserved, 0, sizeof(ev->reserved));
938 ev->type = V4L2_EVENT_CTRL;
939 ev->id = ctrl->id;
940 ev->u.ctrl.changes = changes;
941 ev->u.ctrl.type = ctrl->type;
942 ev->u.ctrl.flags = ctrl->flags;
943 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
944 ev->u.ctrl.value64 = 0;
945 else
946 ev->u.ctrl.value64 = ctrl->cur.val64;
947 ev->u.ctrl.minimum = ctrl->minimum;
948 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 949 if (ctrl->type == V4L2_CTRL_TYPE_MENU
950 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 951 ev->u.ctrl.step = 1;
952 else
953 ev->u.ctrl.step = ctrl->step;
954 ev->u.ctrl.default_value = ctrl->default_value;
955}
956
957static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
958{
959 struct v4l2_event ev;
77068d36 960 struct v4l2_subscribed_event *sev;
6e239399 961
77068d36 962 if (list_empty(&ctrl->ev_subs))
3f66f0ed 963 return;
6e239399
HV		 964 fill_event(&ev, ctrl, changes);
965
77068d36 966 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 967 if (sev->fh != fh ||
968 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 969 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 970}
971
0996517c
HV		 972/* Helper function: copy the current control value back to the caller */
973static int cur_to_user(struct v4l2_ext_control *c,
974 struct v4l2_ctrl *ctrl)
975{
976 u32 len;
977
978 switch (ctrl->type) {
979 case V4L2_CTRL_TYPE_STRING:
980 len = strlen(ctrl->cur.string);
981 if (c->size < len + 1) {
982 c->size = len + 1;
983 return -ENOSPC;
984 }
985 return copy_to_user(c->string, ctrl->cur.string,
986 len + 1) ? -EFAULT : 0;
987 case V4L2_CTRL_TYPE_INTEGER64:
988 c->value64 = ctrl->cur.val64;
989 break;
990 default:
991 c->value = ctrl->cur.val;
992 break;
993 }
994 return 0;
995}
996
997/* Helper function: copy the caller-provider value as the new control value */
998static int user_to_new(struct v4l2_ext_control *c,
999 struct v4l2_ctrl *ctrl)
1000{
1001 int ret;
1002 u32 size;
1003
2a863793 1004 ctrl->is_new = 1;
0996517c
HV		 1005 switch (ctrl->type) {
1006 case V4L2_CTRL_TYPE_INTEGER64:
1007 ctrl->val64 = c->value64;
1008 break;
1009 case V4L2_CTRL_TYPE_STRING:
1010 size = c->size;
1011 if (size == 0)
1012 return -ERANGE;
1013 if (size > ctrl->maximum + 1)
1014 size = ctrl->maximum + 1;
1015 ret = copy_from_user(ctrl->string, c->string, size);
1016 if (!ret) {
1017 char last = ctrl->string[size - 1];
1018
1019 ctrl->string[size - 1] = 0;
1020 /* If the string was longer than ctrl->maximum,
1021 then return an error. */
1022 if (strlen(ctrl->string) == ctrl->maximum && last)
1023 return -ERANGE;
1024 }
1025 return ret ? -EFAULT : 0;
1026 default:
1027 ctrl->val = c->value;
1028 break;
1029 }
1030 return 0;
1031}
1032
1033/* Helper function: copy the new control value back to the caller */
1034static int new_to_user(struct v4l2_ext_control *c,
1035 struct v4l2_ctrl *ctrl)
1036{
1037 u32 len;
1038
1039 switch (ctrl->type) {
1040 case V4L2_CTRL_TYPE_STRING:
1041 len = strlen(ctrl->string);
1042 if (c->size < len + 1) {
1043 c->size = ctrl->maximum + 1;
1044 return -ENOSPC;
1045 }
1046 return copy_to_user(c->string, ctrl->string,
1047 len + 1) ? -EFAULT : 0;
1048 case V4L2_CTRL_TYPE_INTEGER64:
1049 c->value64 = ctrl->val64;
1050 break;
1051 default:
1052 c->value = ctrl->val;
1053 break;
1054 }
1055 return 0;
1056}
1057
1058/* Copy the new value to the current value. */
ab892bac
HV		 1059static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
1060 bool update_inactive)
0996517c 1061{
6e239399
HV		 1062 bool changed = false;
1063
0996517c
HV		 1064 if (ctrl == NULL)
1065 return;
1066 switch (ctrl->type) {
6e239399
HV		 1067 case V4L2_CTRL_TYPE_BUTTON:
1068 changed = true;
1069 break;
0996517c
HV		 1070 case V4L2_CTRL_TYPE_STRING:
1071 /* strings are always 0-terminated */
6e239399 1072 changed = strcmp(ctrl->string, ctrl->cur.string);
0996517c
HV		 1073 strcpy(ctrl->cur.string, ctrl->string);
1074 break;
1075 case V4L2_CTRL_TYPE_INTEGER64:
6e239399 1076 changed = ctrl->val64 != ctrl->cur.val64;
0996517c
HV		 1077 ctrl->cur.val64 = ctrl->val64;
1078 break;
1079 default:
6e239399 1080 changed = ctrl->val != ctrl->cur.val;
0996517c
HV		 1081 ctrl->cur.val = ctrl->val;
1082 break;
1083 }
72d877ca 1084 if (update_inactive) {
5626b8c7
HV		 1085 /* Note: update_inactive can only be true for auto clusters. */
1086 ctrl->flags &=
1087 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1088 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1089 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1090 if (ctrl->cluster[0]->has_volatiles)
1091 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1092 }
1249a3a8 1093 fh = NULL;
72d877ca 1094 }
639884a6
HV		 1095 if (changed || update_inactive) {
1096 /* If a control was changed that was not one of the controls
1097 modified by the application, then send the event to all. */
1098 if (!ctrl->is_new)
1099 fh = NULL;
6e239399
HV		 1100 send_event(fh, ctrl,
1101 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) |
1102 (update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
639884a6 1103 }
0996517c
HV		 1104}
1105
1106/* Copy the current value to the new value */
1107static void cur_to_new(struct v4l2_ctrl *ctrl)
1108{
1109 if (ctrl == NULL)
1110 return;
1111 switch (ctrl->type) {
1112 case V4L2_CTRL_TYPE_STRING:
1113 /* strings are always 0-terminated */
1114 strcpy(ctrl->string, ctrl->cur.string);
1115 break;
1116 case V4L2_CTRL_TYPE_INTEGER64:
1117 ctrl->val64 = ctrl->cur.val64;
1118 break;
1119 default:
1120 ctrl->val = ctrl->cur.val;
1121 break;
1122 }
1123}
1124
1125/* Return non-zero if one or more of the controls in the cluster has a new
1126 value that differs from the current value. */
1127static int cluster_changed(struct v4l2_ctrl *master)
1128{
1129 int diff = 0;
1130 int i;
1131
1132 for (i = 0; !diff && i < master->ncontrols; i++) {
1133 struct v4l2_ctrl *ctrl = master->cluster[i];
1134
1135 if (ctrl == NULL)
1136 continue;
1137 switch (ctrl->type) {
1138 case V4L2_CTRL_TYPE_BUTTON:
1139 /* Button controls are always 'different' */
1140 return 1;
1141 case V4L2_CTRL_TYPE_STRING:
1142 /* strings are always 0-terminated */
1143 diff = strcmp(ctrl->string, ctrl->cur.string);
1144 break;
1145 case V4L2_CTRL_TYPE_INTEGER64:
1146 diff = ctrl->val64 != ctrl->cur.val64;
1147 break;
1148 default:
1149 diff = ctrl->val != ctrl->cur.val;
1150 break;
1151 }
1152 }
1153 return diff;
1154}
1155
eb5b16ef
HV		 1156/* Validate integer-type control */
1157static int validate_new_int(const struct v4l2_ctrl *ctrl, s32 *pval)
0996517c 1158{
eb5b16ef 1159 s32 val = *pval;
0996517c 1160 u32 offset;
0996517c
HV		 1161
1162 switch (ctrl->type) {
1163 case V4L2_CTRL_TYPE_INTEGER:
1164 /* Round towards the closest legal value */
1165 val += ctrl->step / 2;
1166 if (val < ctrl->minimum)
1167 val = ctrl->minimum;
1168 if (val > ctrl->maximum)
1169 val = ctrl->maximum;
1170 offset = val - ctrl->minimum;
1171 offset = ctrl->step * (offset / ctrl->step);
1172 val = ctrl->minimum + offset;
eb5b16ef 1173 *pval = val;
0996517c
HV		 1174 return 0;
1175
1176 case V4L2_CTRL_TYPE_BOOLEAN:
eb5b16ef 1177 *pval = !!val;
0996517c
HV		 1178 return 0;
1179
1180 case V4L2_CTRL_TYPE_MENU:
ce580fe5 1181 case V4L2_CTRL_TYPE_INTEGER_MENU:
0996517c
HV		 1182 if (val < ctrl->minimum || val > ctrl->maximum)
1183 return -ERANGE;
ce580fe5
SA		 1184 if (ctrl->menu_skip_mask & (1 << val))
1185 return -EINVAL;
1186 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
1187 ctrl->qmenu[val][0] == '\0')
0996517c
HV		 1188 return -EINVAL;
1189 return 0;
1190
fa4d7096
HV		 1191 case V4L2_CTRL_TYPE_BITMASK:
1192 *pval &= ctrl->maximum;
1193 return 0;
1194
0996517c
HV		 1195 case V4L2_CTRL_TYPE_BUTTON:
1196 case V4L2_CTRL_TYPE_CTRL_CLASS:
eb5b16ef 1197 *pval = 0;
0996517c
HV		 1198 return 0;
1199
eb5b16ef
HV		 1200 default:
1201 return -EINVAL;
1202 }
1203}
1204
1205/* Validate a new control */
1206static int validate_new(const struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
1207{
1208 char *s = c->string;
1209 size_t len;
1210
1211 switch (ctrl->type) {
1212 case V4L2_CTRL_TYPE_INTEGER:
1213 case V4L2_CTRL_TYPE_BOOLEAN:
1214 case V4L2_CTRL_TYPE_MENU:
ce580fe5 1215 case V4L2_CTRL_TYPE_INTEGER_MENU:
fa4d7096 1216 case V4L2_CTRL_TYPE_BITMASK:
eb5b16ef
HV		 1217 case V4L2_CTRL_TYPE_BUTTON:
1218 case V4L2_CTRL_TYPE_CTRL_CLASS:
1219 return validate_new_int(ctrl, &c->value);
1220
0996517c
HV		 1221 case V4L2_CTRL_TYPE_INTEGER64:
1222 return 0;
1223
1224 case V4L2_CTRL_TYPE_STRING:
1225 len = strlen(s);
1226 if (len < ctrl->minimum)
1227 return -ERANGE;
1228 if ((len - ctrl->minimum) % ctrl->step)
1229 return -ERANGE;
1230 return 0;
1231
1232 default:
1233 return -EINVAL;
1234 }
1235}
1236
1237static inline u32 node2id(struct list_head *node)
1238{
1239 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1240}
1241
1242/* Set the handler's error code if it wasn't set earlier already */
1243static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1244{
1245 if (hdl->error == 0)
1246 hdl->error = err;
1247 return err;
1248}
1249
1250/* Initialize the handler */
1251int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl,
1252 unsigned nr_of_controls_hint)
1253{
77e7c4e6
SA		 1254 hdl->lock = &hdl->_lock;
1255 mutex_init(hdl->lock);
0996517c
HV		 1256 INIT_LIST_HEAD(&hdl->ctrls);
1257 INIT_LIST_HEAD(&hdl->ctrl_refs);
1258 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1259 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1260 GFP_KERNEL);
0996517c
HV		 1261 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1262 return hdl->error;
1263}
1264EXPORT_SYMBOL(v4l2_ctrl_handler_init);
1265
1266/* Free all controls and control refs */
1267void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1268{
1269 struct v4l2_ctrl_ref *ref, *next_ref;
1270 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1271 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1272
1273 if (hdl == NULL || hdl->buckets == NULL)
1274 return;
1275
77e7c4e6 1276 mutex_lock(hdl->lock);
0996517c
HV		 1277 /* Free all nodes */
1278 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1279 list_del(&ref->node);
1280 kfree(ref);
1281 }
1282 /* Free all controls owned by the handler */
1283 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1284 list_del(&ctrl->node);
77068d36
HV		 1285 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1286 list_del(&sev->node);
0996517c
HV		 1287 kfree(ctrl);
1288 }
1289 kfree(hdl->buckets);
1290 hdl->buckets = NULL;
1291 hdl->cached = NULL;
1292 hdl->error = 0;
77e7c4e6 1293 mutex_unlock(hdl->lock);
0996517c
HV		 1294}
1295EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1296
1297/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1298 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1299 with applications that do not use the NEXT_CTRL flag.
1300
1301 We just find the n-th private user control. It's O(N), but that should not
1302 be an issue in this particular case. */
1303static struct v4l2_ctrl_ref *find_private_ref(
1304 struct v4l2_ctrl_handler *hdl, u32 id)
1305{
1306 struct v4l2_ctrl_ref *ref;
1307
1308 id -= V4L2_CID_PRIVATE_BASE;
1309 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1310 /* Search for private user controls that are compatible with
1311 VIDIOC_G/S_CTRL. */
1312 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1313 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
1314 if (!type_is_int(ref->ctrl))
1315 continue;
1316 if (id == 0)
1317 return ref;
1318 id--;
1319 }
1320 }
1321 return NULL;
1322}
1323
1324/* Find a control with the given ID. */
1325static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1326{
1327 struct v4l2_ctrl_ref *ref;
1328 int bucket;
1329
1330 id &= V4L2_CTRL_ID_MASK;
1331
1332 /* Old-style private controls need special handling */
1333 if (id >= V4L2_CID_PRIVATE_BASE)
1334 return find_private_ref(hdl, id);
1335 bucket = id % hdl->nr_of_buckets;
1336
1337 /* Simple optimization: cache the last control found */
1338 if (hdl->cached && hdl->cached->ctrl->id == id)
1339 return hdl->cached;
1340
1341 /* Not in cache, search the hash */
1342 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1343 while (ref && ref->ctrl->id != id)
1344 ref = ref->next;
1345
1346 if (ref)
1347 hdl->cached = ref; /* cache it! */
1348 return ref;
1349}
1350
1351/* Find a control with the given ID. Take the handler's lock first. */
1352static struct v4l2_ctrl_ref *find_ref_lock(
1353 struct v4l2_ctrl_handler *hdl, u32 id)
1354{
1355 struct v4l2_ctrl_ref *ref = NULL;
1356
1357 if (hdl) {
77e7c4e6 1358 mutex_lock(hdl->lock);
0996517c 1359 ref = find_ref(hdl, id);
77e7c4e6 1360 mutex_unlock(hdl->lock);
0996517c
HV		 1361 }
1362 return ref;
1363}
1364
1365/* Find a control with the given ID. */
1366struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1367{
1368 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1369
1370 return ref ? ref->ctrl : NULL;
1371}
1372EXPORT_SYMBOL(v4l2_ctrl_find);
1373
1374/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1375static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1376 struct v4l2_ctrl *ctrl)
1377{
1378 struct v4l2_ctrl_ref *ref;
1379 struct v4l2_ctrl_ref *new_ref;
1380 u32 id = ctrl->id;
1381 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1382 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1383
1384 /* Automatically add the control class if it is not yet present. */
1385 if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
1386 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1387 return hdl->error;
1388
1389 if (hdl->error)
1390 return hdl->error;
1391
1392 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1393 if (!new_ref)
1394 return handler_set_err(hdl, -ENOMEM);
1395 new_ref->ctrl = ctrl;
1396 if (ctrl->handler == hdl) {
1397 /* By default each control starts in a cluster of its own.
1398 new_ref->ctrl is basically a cluster array with one
1399 element, so that's perfect to use as the cluster pointer.
1400 But only do this for the handler that owns the control. */
1401 ctrl->cluster = &new_ref->ctrl;
1402 ctrl->ncontrols = 1;
1403 }
1404
1405 INIT_LIST_HEAD(&new_ref->node);
1406
77e7c4e6 1407 mutex_lock(hdl->lock);
0996517c
HV		 1408
1409 /* Add immediately at the end of the list if the list is empty, or if
1410 the last element in the list has a lower ID.
1411 This ensures that when elements are added in ascending order the
1412 insertion is an O(1) operation. */
1413 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1414 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1415 goto insert_in_hash;
1416 }
1417
1418 /* Find insert position in sorted list */
1419 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1420 if (ref->ctrl->id < id)
1421 continue;
1422 /* Don't add duplicates */
1423 if (ref->ctrl->id == id) {
1424 kfree(new_ref);
1425 goto unlock;
1426 }
1427 list_add(&new_ref->node, ref->node.prev);
1428 break;
1429 }
1430
1431insert_in_hash:
1432 /* Insert the control node in the hash */
1433 new_ref->next = hdl->buckets[bucket];
1434 hdl->buckets[bucket] = new_ref;
1435
1436unlock:
77e7c4e6 1437 mutex_unlock(hdl->lock);
0996517c
HV		 1438 return 0;
1439}
1440
1441/* Add a new control */
1442static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1443 const struct v4l2_ctrl_ops *ops,
1444 u32 id, const char *name, enum v4l2_ctrl_type type,
1445 s32 min, s32 max, u32 step, s32 def,
ce580fe5
SA		 1446 u32 flags, const char * const *qmenu,
1447 const s64 *qmenu_int, void *priv)
0996517c
HV		 1448{
1449 struct v4l2_ctrl *ctrl;
1450 unsigned sz_extra = 0;
1451
1452 if (hdl->error)
1453 return NULL;
1454
1455 /* Sanity checks */
1456 if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1457 (type == V4L2_CTRL_TYPE_INTEGER && step == 0) ||
fa4d7096 1458 (type == V4L2_CTRL_TYPE_BITMASK && max == 0) ||
0996517c 1459 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
ce580fe5 1460 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL) ||
0996517c
HV		 1461 (type == V4L2_CTRL_TYPE_STRING && max == 0)) {
1462 handler_set_err(hdl, -ERANGE);
1463 return NULL;
1464 }
fa4d7096
HV		 1465 if (type != V4L2_CTRL_TYPE_BITMASK && max < min) {
1466 handler_set_err(hdl, -ERANGE);
1467 return NULL;
1468 }
02ac0480
HV		 1469 if ((type == V4L2_CTRL_TYPE_INTEGER ||
1470 type == V4L2_CTRL_TYPE_MENU ||
ce580fe5 1471 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
02ac0480
HV		 1472 type == V4L2_CTRL_TYPE_BOOLEAN) &&
1473 (def < min || def > max)) {
1474 handler_set_err(hdl, -ERANGE);
1475 return NULL;
1476 }
fa4d7096
HV		 1477 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1478 handler_set_err(hdl, -ERANGE);
1479 return NULL;
1480 }
0996517c
HV		 1481
1482 if (type == V4L2_CTRL_TYPE_BUTTON)
1483 flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1484 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1485 flags |= V4L2_CTRL_FLAG_READ_ONLY;
1486 else if (type == V4L2_CTRL_TYPE_STRING)
1487 sz_extra += 2 * (max + 1);
1488
1489 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1490 if (ctrl == NULL) {
1491 handler_set_err(hdl, -ENOMEM);
1492 return NULL;
1493 }
1494
1495 INIT_LIST_HEAD(&ctrl->node);
77068d36 1496 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1497 ctrl->handler = hdl;
1498 ctrl->ops = ops;
1499 ctrl->id = id;
1500 ctrl->name = name;
1501 ctrl->type = type;
1502 ctrl->flags = flags;
1503 ctrl->minimum = min;
1504 ctrl->maximum = max;
1505 ctrl->step = step;
ce580fe5
SA		 1506 if (type == V4L2_CTRL_TYPE_MENU)
1507 ctrl->qmenu = qmenu;
1508 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1509 ctrl->qmenu_int = qmenu_int;
0996517c
HV		 1510 ctrl->priv = priv;
1511 ctrl->cur.val = ctrl->val = ctrl->default_value = def;
1512
1513 if (ctrl->type == V4L2_CTRL_TYPE_STRING) {
1514 ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1);
1515 ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1);
1516 if (ctrl->minimum)
1517 memset(ctrl->cur.string, ' ', ctrl->minimum);
1518 }
1519 if (handler_new_ref(hdl, ctrl)) {
1520 kfree(ctrl);
1521 return NULL;
1522 }
77e7c4e6 1523 mutex_lock(hdl->lock);
0996517c 1524 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 1525 mutex_unlock(hdl->lock);
0996517c
HV		 1526 return ctrl;
1527}
1528
1529struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
1530 const struct v4l2_ctrl_config *cfg, void *priv)
1531{
1532 bool is_menu;
1533 struct v4l2_ctrl *ctrl;
1534 const char *name = cfg->name;
513521ea 1535 const char * const *qmenu = cfg->qmenu;
ce580fe5 1536 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 1537 enum v4l2_ctrl_type type = cfg->type;
1538 u32 flags = cfg->flags;
1539 s32 min = cfg->min;
1540 s32 max = cfg->max;
1541 u32 step = cfg->step;
1542 s32 def = cfg->def;
1543
1544 if (name == NULL)
1545 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
1546 &def, &flags);
1547
ce580fe5
SA		 1548 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
1549 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 1550 if (is_menu)
1551 WARN_ON(step);
1552 else
1553 WARN_ON(cfg->menu_skip_mask);
ce580fe5 1554 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 1555 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 1556 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
1557 qmenu_int == NULL) {
1558 handler_set_err(hdl, -EINVAL);
1559 return NULL;
1560 }
0996517c
HV		 1561
1562 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name,
1563 type, min, max,
1564 is_menu ? cfg->menu_skip_mask : step,
ce580fe5 1565 def, flags, qmenu, qmenu_int, priv);
88365105 1566 if (ctrl)
0996517c 1567 ctrl->is_private = cfg->is_private;
0996517c
HV		 1568 return ctrl;
1569}
1570EXPORT_SYMBOL(v4l2_ctrl_new_custom);
1571
1572/* Helper function for standard non-menu controls */
1573struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
1574 const struct v4l2_ctrl_ops *ops,
1575 u32 id, s32 min, s32 max, u32 step, s32 def)
1576{
1577 const char *name;
1578 enum v4l2_ctrl_type type;
1579 u32 flags;
1580
1581 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
ce580fe5
SA		 1582 if (type == V4L2_CTRL_TYPE_MENU
1583 || type == V4L2_CTRL_TYPE_INTEGER_MENU) {
0996517c
HV		 1584 handler_set_err(hdl, -EINVAL);
1585 return NULL;
1586 }
1587 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1588 min, max, step, def, flags, NULL, NULL, NULL);
0996517c
HV		 1589}
1590EXPORT_SYMBOL(v4l2_ctrl_new_std);
1591
1592/* Helper function for standard menu controls */
1593struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
1594 const struct v4l2_ctrl_ops *ops,
1595 u32 id, s32 max, s32 mask, s32 def)
1596{
513521ea 1597 const char * const *qmenu = v4l2_ctrl_get_menu(id);
0996517c
HV		 1598 const char *name;
1599 enum v4l2_ctrl_type type;
1600 s32 min;
1601 s32 step;
1602 u32 flags;
1603
1604 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1605 if (type != V4L2_CTRL_TYPE_MENU) {
1606 handler_set_err(hdl, -EINVAL);
1607 return NULL;
1608 }
1609 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1610 0, max, mask, def, flags, qmenu, NULL, NULL);
0996517c
HV		 1611}
1612EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
1613
515f3287
SN		 1614/* Helper function for standard integer menu controls */
1615struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
1616 const struct v4l2_ctrl_ops *ops,
1617 u32 id, s32 max, s32 def, const s64 *qmenu_int)
1618{
1619 const char *name;
1620 enum v4l2_ctrl_type type;
1621 s32 min;
1622 s32 step;
1623 u32 flags;
1624
1625 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1626 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
1627 handler_set_err(hdl, -EINVAL);
1628 return NULL;
1629 }
1630 return v4l2_ctrl_new(hdl, ops, id, name, type,
1631 0, max, 0, def, flags, NULL, qmenu_int, NULL);
1632}
1633EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
1634
0996517c
HV		 1635/* Add a control from another handler to this handler */
1636struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
1637 struct v4l2_ctrl *ctrl)
1638{
1639 if (hdl == NULL || hdl->error)
1640 return NULL;
1641 if (ctrl == NULL) {
1642 handler_set_err(hdl, -EINVAL);
1643 return NULL;
1644 }
1645 if (ctrl->handler == hdl)
1646 return ctrl;
1647 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
1648}
1649EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
1650
1651/* Add the controls from another handler to our own. */
1652int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
1653 struct v4l2_ctrl_handler *add)
1654{
072e6602 1655 struct v4l2_ctrl_ref *ref;
0996517c
HV		 1656 int ret = 0;
1657
1658 /* Do nothing if either handler is NULL or if they are the same */
1659 if (!hdl || !add || hdl == add)
1660 return 0;
1661 if (hdl->error)
1662 return hdl->error;
77e7c4e6 1663 mutex_lock(add->lock);
072e6602
HV		 1664 list_for_each_entry(ref, &add->ctrl_refs, node) {
1665 struct v4l2_ctrl *ctrl = ref->ctrl;
1666
0996517c
HV		 1667 /* Skip handler-private controls. */
1668 if (ctrl->is_private)
1669 continue;
6e239399
HV		 1670 /* And control classes */
1671 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1672 continue;
0996517c
HV		 1673 ret = handler_new_ref(hdl, ctrl);
1674 if (ret)
1675 break;
1676 }
77e7c4e6 1677 mutex_unlock(add->lock);
0996517c
HV		 1678 return ret;
1679}
1680EXPORT_SYMBOL(v4l2_ctrl_add_handler);
1681
1682/* Cluster controls */
1683void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
1684{
5626b8c7 1685 bool has_volatiles = false;
0996517c
HV		 1686 int i;
1687
1688 /* The first control is the master control and it must not be NULL */
72d877ca 1689 BUG_ON(ncontrols == 0 || controls[0] == NULL);
0996517c
HV		 1690
1691 for (i = 0; i < ncontrols; i++) {
1692 if (controls[i]) {
1693 controls[i]->cluster = controls;
1694 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 1695 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
1696 has_volatiles = true;
0996517c
HV		 1697 }
1698 }
5626b8c7 1699 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 1700}
1701EXPORT_SYMBOL(v4l2_ctrl_cluster);
1702
72d877ca
HV		 1703void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
1704 u8 manual_val, bool set_volatile)
1705{
1706 struct v4l2_ctrl *master = controls[0];
5626b8c7 1707 u32 flag = 0;
72d877ca
HV		 1708 int i;
1709
1710 v4l2_ctrl_cluster(ncontrols, controls);
1711 WARN_ON(ncontrols <= 1);
82a7c049 1712 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 1713 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 1714 master->is_auto = true;
5626b8c7 1715 master->has_volatiles = set_volatile;
72d877ca
HV		 1716 master->manual_mode_value = manual_val;
1717 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 1718
1719 if (!is_cur_manual(master))
1720 flag = V4L2_CTRL_FLAG_INACTIVE |
1721 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 1722
1723 for (i = 1; i < ncontrols; i++)
88365105 1724 if (controls[i])
72d877ca 1725 controls[i]->flags |= flag;
72d877ca
HV		 1726}
1727EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
1728
0996517c
HV		 1729/* Activate/deactivate a control. */
1730void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
1731{
6e239399
HV		 1732 /* invert since the actual flag is called 'inactive' */
1733 bool inactive = !active;
1734 bool old;
1735
0996517c
HV		 1736 if (ctrl == NULL)
1737 return;
1738
6e239399 1739 if (inactive)
0996517c 1740 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 1741 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 1742 else
1743 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 1744 old = test_and_clear_bit(4, &ctrl->flags);
1745 if (old != inactive)
1746 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 1747}
1748EXPORT_SYMBOL(v4l2_ctrl_activate);
1749
1750/* Grab/ungrab a control.
1751 Typically used when streaming starts and you want to grab controls,
1752 preventing the user from changing them.
1753
1754 Just call this and the framework will block any attempts to change
1755 these controls. */
1756void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
1757{
6e239399
HV		 1758 bool old;
1759
0996517c
HV		 1760 if (ctrl == NULL)
1761 return;
1762
6e239399 1763 v4l2_ctrl_lock(ctrl);
0996517c
HV		 1764 if (grabbed)
1765 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 1766 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 1767 else
1768 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 1769 old = test_and_clear_bit(1, &ctrl->flags);
1770 if (old != grabbed)
1771 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
1772 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 1773}
1774EXPORT_SYMBOL(v4l2_ctrl_grab);
1775
1776/* Log the control name and value */
1777static void log_ctrl(const struct v4l2_ctrl *ctrl,
1778 const char *prefix, const char *colon)
1779{
0996517c
HV		 1780 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
1781 return;
1782 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1783 return;
1784
1785 printk(KERN_INFO "%s%s%s: ", prefix, colon, ctrl->name);
1786
1787 switch (ctrl->type) {
1788 case V4L2_CTRL_TYPE_INTEGER:
1789 printk(KERN_CONT "%d", ctrl->cur.val);
1790 break;
1791 case V4L2_CTRL_TYPE_BOOLEAN:
1792 printk(KERN_CONT "%s", ctrl->cur.val ? "true" : "false");
1793 break;
1794 case V4L2_CTRL_TYPE_MENU:
1795 printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]);
1796 break;
ce580fe5
SA		 1797 case V4L2_CTRL_TYPE_INTEGER_MENU:
1798 printk(KERN_CONT "%lld", ctrl->qmenu_int[ctrl->cur.val]);
1799 break;
fa4d7096
HV		 1800 case V4L2_CTRL_TYPE_BITMASK:
1801 printk(KERN_CONT "0x%08x", ctrl->cur.val);
1802 break;
0996517c
HV		 1803 case V4L2_CTRL_TYPE_INTEGER64:
1804 printk(KERN_CONT "%lld", ctrl->cur.val64);
1805 break;
1806 case V4L2_CTRL_TYPE_STRING:
1807 printk(KERN_CONT "%s", ctrl->cur.string);
1808 break;
1809 default:
1810 printk(KERN_CONT "unknown type %d", ctrl->type);
1811 break;
1812 }
88365105
HV		 1813 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
1814 V4L2_CTRL_FLAG_GRABBED |
1815 V4L2_CTRL_FLAG_VOLATILE)) {
1816 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
1817 printk(KERN_CONT " inactive");
1818 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
1819 printk(KERN_CONT " grabbed");
1820 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
1821 printk(KERN_CONT " volatile");
1822 }
1823 printk(KERN_CONT "\n");
0996517c
HV		 1824}
1825
1826/* Log all controls owned by the handler */
1827void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
1828 const char *prefix)
1829{
1830 struct v4l2_ctrl *ctrl;
1831 const char *colon = "";
1832 int len;
1833
1834 if (hdl == NULL)
1835 return;
1836 if (prefix == NULL)
1837 prefix = "";
1838 len = strlen(prefix);
1839 if (len && prefix[len - 1] != ' ')
1840 colon = ": ";
77e7c4e6 1841 mutex_lock(hdl->lock);
0996517c
HV		 1842 list_for_each_entry(ctrl, &hdl->ctrls, node)
1843 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
1844 log_ctrl(ctrl, prefix, colon);
77e7c4e6 1845 mutex_unlock(hdl->lock);
0996517c
HV		 1846}
1847EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
1848
1849/* Call s_ctrl for all controls owned by the handler */
1850int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
1851{
1852 struct v4l2_ctrl *ctrl;
1853 int ret = 0;
1854
1855 if (hdl == NULL)
1856 return 0;
77e7c4e6 1857 mutex_lock(hdl->lock);
0996517c
HV		 1858 list_for_each_entry(ctrl, &hdl->ctrls, node)
1859 ctrl->done = false;
1860
1861 list_for_each_entry(ctrl, &hdl->ctrls, node) {
1862 struct v4l2_ctrl *master = ctrl->cluster[0];
1863 int i;
1864
1865 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 1866 /* Skip button controls and read-only controls. */
1867 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
1868 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 1869 continue;
1870
2a863793
HV		 1871 for (i = 0; i < master->ncontrols; i++) {
1872 if (master->cluster[i]) {
1873 cur_to_new(master->cluster[i]);
1874 master->cluster[i]->is_new = 1;
71c6c4c9 1875 master->cluster[i]->done = true;
2a863793
HV		 1876 }
1877 }
54c911eb 1878 ret = call_op(master, s_ctrl);
0996517c
HV		 1879 if (ret)
1880 break;
0996517c 1881 }
77e7c4e6 1882 mutex_unlock(hdl->lock);
0996517c
HV		 1883 return ret;
1884}
1885EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
1886
1887/* Implement VIDIOC_QUERYCTRL */
1888int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
1889{
1890 u32 id = qc->id & V4L2_CTRL_ID_MASK;
1891 struct v4l2_ctrl_ref *ref;
1892 struct v4l2_ctrl *ctrl;
1893
1894 if (hdl == NULL)
1895 return -EINVAL;
1896
77e7c4e6 1897 mutex_lock(hdl->lock);
0996517c
HV		 1898
1899 /* Try to find it */
1900 ref = find_ref(hdl, id);
1901
1902 if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) {
1903 /* Find the next control with ID > qc->id */
1904
1905 /* Did we reach the end of the control list? */
1906 if (id >= node2id(hdl->ctrl_refs.prev)) {
1907 ref = NULL; /* Yes, so there is no next control */
1908 } else if (ref) {
1909 /* We found a control with the given ID, so just get
1910 the next one in the list. */
1911 ref = list_entry(ref->node.next, typeof(*ref), node);
1912 } else {
1913 /* No control with the given ID exists, so start
1914 searching for the next largest ID. We know there
1915 is one, otherwise the first 'if' above would have
1916 been true. */
1917 list_for_each_entry(ref, &hdl->ctrl_refs, node)
1918 if (id < ref->ctrl->id)
1919 break;
1920 }
1921 }
77e7c4e6 1922 mutex_unlock(hdl->lock);
0996517c
HV		 1923 if (!ref)
1924 return -EINVAL;
1925
1926 ctrl = ref->ctrl;
1927 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 1928 if (id >= V4L2_CID_PRIVATE_BASE)
1929 qc->id = id;
1930 else
1931 qc->id = ctrl->id;
0996517c
HV		 1932 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
1933 qc->minimum = ctrl->minimum;
1934 qc->maximum = ctrl->maximum;
1935 qc->default_value = ctrl->default_value;
ce580fe5
SA		 1936 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1937 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 1938 qc->step = 1;
1939 else
1940 qc->step = ctrl->step;
1941 qc->flags = ctrl->flags;
1942 qc->type = ctrl->type;
1943 return 0;
1944}
1945EXPORT_SYMBOL(v4l2_queryctrl);
1946
1947int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
1948{
87a0c94c
HV		 1949 if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL)
1950 return -EINVAL;
0996517c
HV		 1951 return v4l2_queryctrl(sd->ctrl_handler, qc);
1952}
1953EXPORT_SYMBOL(v4l2_subdev_queryctrl);
1954
1955/* Implement VIDIOC_QUERYMENU */
1956int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
1957{
1958 struct v4l2_ctrl *ctrl;
1959 u32 i = qm->index;
1960
1961 ctrl = v4l2_ctrl_find(hdl, qm->id);
1962 if (!ctrl)
1963 return -EINVAL;
1964
1965 qm->reserved = 0;
1966 /* Sanity checks */
ce580fe5
SA		 1967 switch (ctrl->type) {
1968 case V4L2_CTRL_TYPE_MENU:
1969 if (ctrl->qmenu == NULL)
1970 return -EINVAL;
1971 break;
1972 case V4L2_CTRL_TYPE_INTEGER_MENU:
1973 if (ctrl->qmenu_int == NULL)
1974 return -EINVAL;
1975 break;
1976 default:
1977 return -EINVAL;
1978 }
1979
1980 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 1981 return -EINVAL;
ce580fe5 1982
0996517c
HV		 1983 /* Use mask to see if this menu item should be skipped */
1984 if (ctrl->menu_skip_mask & (1 << i))
1985 return -EINVAL;
1986 /* Empty menu items should also be skipped */
ce580fe5
SA		 1987 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
1988 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
1989 return -EINVAL;
1990 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
1991 } else {
1992 qm->value = ctrl->qmenu_int[i];
1993 }
0996517c
HV		 1994 return 0;
1995}
1996EXPORT_SYMBOL(v4l2_querymenu);
1997
1998int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
1999{
2000 return v4l2_querymenu(sd->ctrl_handler, qm);
2001}
2002EXPORT_SYMBOL(v4l2_subdev_querymenu);
2003
2004
2005
2006/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2007
2008 It is not a fully atomic operation, just best-effort only. After all, if
2009 multiple controls have to be set through multiple i2c writes (for example)
2010 then some initial writes may succeed while others fail. Thus leaving the
2011 system in an inconsistent state. The question is how much effort you are
2012 willing to spend on trying to make something atomic that really isn't.
2013
2014 From the point of view of an application the main requirement is that
2015 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2016 error should be returned without actually affecting any controls.
2017
2018 If all the values are correct, then it is acceptable to just give up
2019 in case of low-level errors.
2020
2021 It is important though that the application can tell when only a partial
2022 configuration was done. The way we do that is through the error_idx field
2023 of struct v4l2_ext_controls: if that is equal to the count field then no
2024 controls were affected. Otherwise all controls before that index were
2025 successful in performing their 'get' or 'set' operation, the control at
2026 the given index failed, and you don't know what happened with the controls
2027 after the failed one. Since if they were part of a control cluster they
2028 could have been successfully processed (if a cluster member was encountered
2029 at index < error_idx), they could have failed (if a cluster member was at
2030 error_idx), or they may not have been processed yet (if the first cluster
2031 member appeared after error_idx).
2032
2033 It is all fairly theoretical, though. In practice all you can do is to
2034 bail out. If error_idx == count, then it is an application bug. If
2035 error_idx < count then it is only an application bug if the error code was
2036 EBUSY. That usually means that something started streaming just when you
2037 tried to set the controls. In all other cases it is a driver/hardware
2038 problem and all you can do is to retry or bail out.
2039
2040 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2041 never modifies controls the error_idx is just set to whatever control
2042 has an invalid value.
2043 */
2044
2045/* Prepare for the extended g/s/try functions.
2046 Find the controls in the control array and do some basic checks. */
2047static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2048 struct v4l2_ext_controls *cs,
eb5b16ef 2049 struct v4l2_ctrl_helper *helpers)
0996517c 2050{
eb5b16ef
HV		 2051 struct v4l2_ctrl_helper *h;
2052 bool have_clusters = false;
0996517c
HV		 2053 u32 i;
2054
eb5b16ef 2055 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2056 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2057 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2058 struct v4l2_ctrl *ctrl;
2059 u32 id = c->id & V4L2_CTRL_ID_MASK;
2060
37cd3b73 2061 cs->error_idx = i;
0996517c
HV		 2062
2063 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2064 return -EINVAL;
2065
2066 /* Old-style private controls are not allowed for
2067 extended controls */
2068 if (id >= V4L2_CID_PRIVATE_BASE)
2069 return -EINVAL;
eb5b16ef
HV		 2070 ref = find_ref_lock(hdl, id);
2071 if (ref == NULL)
0996517c 2072 return -EINVAL;
eb5b16ef 2073 ctrl = ref->ctrl;
0996517c
HV		 2074 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2075 return -EINVAL;
2076
eb5b16ef
HV		 2077 if (ctrl->cluster[0]->ncontrols > 1)
2078 have_clusters = true;
2079 if (ctrl->cluster[0] != ctrl)
2080 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
2081 /* Store the ref to the master control of the cluster */
2082 h->mref = ref;
2083 h->ctrl = ctrl;
2084 /* Initially set next to 0, meaning that there is no other
2085 control in this helper array belonging to the same
2086 cluster */
2087 h->next = 0;
0996517c 2088 }
0996517c 2089
eb5b16ef
HV		 2090 /* We are done if there were no controls that belong to a multi-
2091 control cluster. */
2092 if (!have_clusters)
2093 return 0;
0996517c 2094
eb5b16ef
HV		 2095 /* The code below figures out in O(n) time which controls in the list
2096 belong to the same cluster. */
0996517c 2097
eb5b16ef 2098 /* This has to be done with the handler lock taken. */
77e7c4e6 2099 mutex_lock(hdl->lock);
0996517c 2100
eb5b16ef
HV		 2101 /* First zero the helper field in the master control references */
2102 for (i = 0; i < cs->count; i++)
2103 helpers[i].mref->helper = 0;
2104 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2105 struct v4l2_ctrl_ref *mref = h->mref;
2106
2107 /* If the mref->helper is set, then it points to an earlier
2108 helper that belongs to the same cluster. */
2109 if (mref->helper) {
2110 /* Set the next field of mref->helper to the current
2111 index: this means that that earlier helper now
2112 points to the next helper in the same cluster. */
2113 mref->helper->next = i;
2114 /* mref should be set only for the first helper in the
2115 cluster, clear the others. */
2116 h->mref = NULL;
2117 }
2118 /* Point the mref helper to the current helper struct. */
2119 mref->helper = h;
0996517c 2120 }
77e7c4e6 2121 mutex_unlock(hdl->lock);
eb5b16ef 2122 return 0;
0996517c
HV		 2123}
2124
2125/* Handles the corner case where cs->count == 0. It checks whether the
2126 specified control class exists. If that class ID is 0, then it checks
2127 whether there are any controls at all. */
2128static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2129{
2130 if (ctrl_class == 0)
2131 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2132 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2133}
2134
2135
2136
2137/* Get extended controls. Allocates the helpers array if needed. */
2138int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2139{
eb5b16ef
HV		 2140 struct v4l2_ctrl_helper helper[4];
2141 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2142 int ret;
ddac5c10 2143 int i, j;
0996517c
HV		 2144
2145 cs->error_idx = cs->count;
2146 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2147
2148 if (hdl == NULL)
2149 return -EINVAL;
2150
2151 if (cs->count == 0)
2152 return class_check(hdl, cs->ctrl_class);
2153
2154 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2155 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2156 GFP_KERNEL);
0996517c
HV		 2157 if (helpers == NULL)
2158 return -ENOMEM;
2159 }
2160
37cd3b73
HV		 2161 ret = prepare_ext_ctrls(hdl, cs, helpers);
2162 cs->error_idx = cs->count;
0996517c
HV		 2163
2164 for (i = 0; !ret && i < cs->count; i++)
2165 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2166 ret = -EACCES;
2167
2168 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2169 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2170 struct v4l2_ctrl *ctrl) = cur_to_user;
2171 struct v4l2_ctrl *master;
0996517c 2172
eb5b16ef 2173 if (helpers[i].mref == NULL)
0996517c
HV		 2174 continue;
2175
eb5b16ef 2176 master = helpers[i].mref->ctrl;
0996517c
HV		 2177 cs->error_idx = i;
2178
2179 v4l2_ctrl_lock(master);
ddac5c10
HV		 2180
2181 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2182 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2183 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2184 for (j = 0; j < master->ncontrols; j++)
2185 cur_to_new(master->cluster[j]);
54c911eb 2186 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2187 ctrl_to_user = new_to_user;
ddac5c10
HV		 2188 }
2189 /* If OK, then copy the current (for non-volatile controls)
2190 or the new (for volatile controls) control values to the
2191 caller */
eb5b16ef
HV		 2192 if (!ret) {
2193 u32 idx = i;
2194
2195 do {
2196 ret = ctrl_to_user(cs->controls + idx,
2197 helpers[idx].ctrl);
2198 idx = helpers[idx].next;
2199 } while (!ret && idx);
2200 }
0996517c 2201 v4l2_ctrl_unlock(master);
0996517c
HV		 2202 }
2203
2204 if (cs->count > ARRAY_SIZE(helper))
2205 kfree(helpers);
2206 return ret;
2207}
2208EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2209
2210int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2211{
2212 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2213}
2214EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2215
2216/* Helper function to get a single control */
2217static int get_ctrl(struct v4l2_ctrl *ctrl, s32 *val)
2218{
2219 struct v4l2_ctrl *master = ctrl->cluster[0];
2220 int ret = 0;
ddac5c10 2221 int i;
0996517c
HV		 2222
2223 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2224 return -EACCES;
2225
2226 v4l2_ctrl_lock(master);
2227 /* g_volatile_ctrl will update the current control values */
5626b8c7 2228 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2229 for (i = 0; i < master->ncontrols; i++)
2230 cur_to_new(master->cluster[i]);
54c911eb 2231 ret = call_op(master, g_volatile_ctrl);
ddac5c10
HV		 2232 *val = ctrl->val;
2233 } else {
2234 *val = ctrl->cur.val;
2235 }
0996517c
HV		 2236 v4l2_ctrl_unlock(master);
2237 return ret;
2238}
2239
2240int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2241{
2242 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
2243
2244 if (ctrl == NULL || !type_is_int(ctrl))
2245 return -EINVAL;
2246 return get_ctrl(ctrl, &control->value);
2247}
2248EXPORT_SYMBOL(v4l2_g_ctrl);
2249
2250int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2251{
2252 return v4l2_g_ctrl(sd->ctrl_handler, control);
2253}
2254EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2255
2256s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2257{
2258 s32 val = 0;
2259
2260 /* It's a driver bug if this happens. */
2261 WARN_ON(!type_is_int(ctrl));
2262 get_ctrl(ctrl, &val);
2263 return val;
2264}
2265EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2266
2267
2268/* Core function that calls try/s_ctrl and ensures that the new value is
2269 copied to the current value on a set.
2270 Must be called with ctrl->handler->lock held. */
e6402585
HV		 2271static int try_or_set_cluster(struct v4l2_fh *fh,
2272 struct v4l2_ctrl *master, bool set)
0996517c 2273{
72d877ca 2274 bool update_flag;
eb5b16ef 2275 int ret;
0996517c
HV		 2276 int i;
2277
2278 /* Go through the cluster and either validate the new value or
2279 (if no new value was set), copy the current value to the new
2280 value, ensuring a consistent view for the control ops when
2281 called. */
eb5b16ef 2282 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2283 struct v4l2_ctrl *ctrl = master->cluster[i];
2284
2285 if (ctrl == NULL)
2286 continue;
2287
eb5b16ef
HV		 2288 if (!ctrl->is_new) {
2289 cur_to_new(ctrl);
0996517c
HV		 2290 continue;
2291 }
eb5b16ef
HV		 2292 /* Check again: it may have changed since the
2293 previous check in try_or_set_ext_ctrls(). */
2294 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2295 return -EBUSY;
0996517c
HV		 2296 }
2297
eb5b16ef 2298 ret = call_op(master, try_ctrl);
0996517c
HV		 2299
2300 /* Don't set if there is no change */
72d877ca
HV		 2301 if (ret || !set || !cluster_changed(master))
2302 return ret;
2303 ret = call_op(master, s_ctrl);
72d877ca
HV		 2304 if (ret)
2305 return ret;
2306
eb5b16ef 2307 /* If OK, then make the new values permanent. */
72d877ca
HV		 2308 update_flag = is_cur_manual(master) != is_new_manual(master);
2309 for (i = 0; i < master->ncontrols; i++)
ab892bac 2310 new_to_cur(fh, master->cluster[i], update_flag && i > 0);
72d877ca 2311 return 0;
0996517c
HV		 2312}
2313
e6402585
HV		 2314/* Validate controls. */
2315static int validate_ctrls(struct v4l2_ext_controls *cs,
2316 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 2317{
e6402585 2318 unsigned i;
0996517c
HV		 2319 int ret = 0;
2320
eb5b16ef 2321 cs->error_idx = cs->count;
0996517c
HV		 2322 for (i = 0; i < cs->count; i++) {
2323 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
2324
e6402585 2325 cs->error_idx = i;
0996517c
HV		 2326
2327 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2328 return -EACCES;
2329 /* This test is also done in try_set_control_cluster() which
2330 is called in atomic context, so that has the final say,
2331 but it makes sense to do an up-front check as well. Once
2332 an error occurs in try_set_control_cluster() some other
2333 controls may have been set already and we want to do a
2334 best-effort to avoid that. */
2335 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2336 return -EBUSY;
eb5b16ef
HV		 2337 ret = validate_new(ctrl, &cs->controls[i]);
2338 if (ret)
2339 return ret;
0996517c 2340 }
e6402585
HV		 2341 return 0;
2342}
2343
5626b8c7
HV		 2344/* Obtain the current volatile values of an autocluster and mark them
2345 as new. */
2346static void update_from_auto_cluster(struct v4l2_ctrl *master)
2347{
2348 int i;
2349
2350 for (i = 0; i < master->ncontrols; i++)
2351 cur_to_new(master->cluster[i]);
2352 if (!call_op(master, g_volatile_ctrl))
2353 for (i = 1; i < master->ncontrols; i++)
2354 if (master->cluster[i])
2355 master->cluster[i]->is_new = 1;
2356}
2357
e6402585
HV		 2358/* Try or try-and-set controls */
2359static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2360 struct v4l2_ext_controls *cs,
2361 bool set)
2362{
2363 struct v4l2_ctrl_helper helper[4];
2364 struct v4l2_ctrl_helper *helpers = helper;
2365 unsigned i, j;
2366 int ret;
2367
2368 cs->error_idx = cs->count;
2369 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2370
2371 if (hdl == NULL)
2372 return -EINVAL;
2373
2374 if (cs->count == 0)
2375 return class_check(hdl, cs->ctrl_class);
0996517c 2376
e6402585 2377 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 2378 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2379 GFP_KERNEL);
e6402585
HV		 2380 if (!helpers)
2381 return -ENOMEM;
2382 }
2383 ret = prepare_ext_ctrls(hdl, cs, helpers);
2384 if (!ret)
2385 ret = validate_ctrls(cs, helpers, set);
2386 if (ret && set)
2387 cs->error_idx = cs->count;
0996517c 2388 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2389 struct v4l2_ctrl *master;
2390 u32 idx = i;
0996517c 2391
eb5b16ef 2392 if (helpers[i].mref == NULL)
0996517c
HV		 2393 continue;
2394
37cd3b73 2395 cs->error_idx = i;
eb5b16ef
HV		 2396 master = helpers[i].mref->ctrl;
2397 v4l2_ctrl_lock(master);
0996517c 2398
2a863793 2399 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2400 for (j = 0; j < master->ncontrols; j++)
2401 if (master->cluster[j])
2a863793 2402 master->cluster[j]->is_new = 0;
0996517c 2403
5626b8c7
HV		 2404 /* For volatile autoclusters that are currently in auto mode
2405 we need to discover if it will be set to manual mode.
2406 If so, then we have to copy the current volatile values
2407 first since those will become the new manual values (which
2408 may be overwritten by explicit new values from this set
2409 of controls). */
2410 if (master->is_auto && master->has_volatiles &&
2411 !is_cur_manual(master)) {
2412 /* Pick an initial non-manual value */
2413 s32 new_auto_val = master->manual_mode_value + 1;
2414 u32 tmp_idx = idx;
2415
2416 do {
2417 /* Check if the auto control is part of the
2418 list, and remember the new value. */
2419 if (helpers[tmp_idx].ctrl == master)
2420 new_auto_val = cs->controls[tmp_idx].value;
2421 tmp_idx = helpers[tmp_idx].next;
2422 } while (tmp_idx);
2423 /* If the new value == the manual value, then copy
2424 the current volatile values. */
2425 if (new_auto_val == master->manual_mode_value)
2426 update_from_auto_cluster(master);
2427 }
2428
0996517c 2429 /* Copy the new caller-supplied control values.
2a863793 2430 user_to_new() sets 'is_new' to 1. */
eb5b16ef
HV		 2431 do {
2432 ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
2433 idx = helpers[idx].next;
2434 } while (!ret && idx);
0996517c
HV		 2435
2436 if (!ret)
e6402585 2437 ret = try_or_set_cluster(fh, master, set);
0996517c
HV		 2438
2439 /* Copy the new values back to userspace. */
eb5b16ef
HV		 2440 if (!ret) {
2441 idx = i;
2442 do {
adf41b9b 2443 ret = new_to_user(cs->controls + idx,
e6402585 2444 helpers[idx].ctrl);
eb5b16ef
HV		 2445 idx = helpers[idx].next;
2446 } while (!ret && idx);
2447 }
2448 v4l2_ctrl_unlock(master);
0996517c 2449 }
0996517c 2450
0996517c
HV		 2451 if (cs->count > ARRAY_SIZE(helper))
2452 kfree(helpers);
2453 return ret;
2454}
2455
2456int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2457{
ab892bac 2458 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 2459}
2460EXPORT_SYMBOL(v4l2_try_ext_ctrls);
2461
ab892bac
HV		 2462int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2463 struct v4l2_ext_controls *cs)
0996517c 2464{
ab892bac 2465 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 2466}
2467EXPORT_SYMBOL(v4l2_s_ext_ctrls);
2468
2469int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2470{
ab892bac 2471 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 2472}
2473EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
2474
2475int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2476{
ab892bac 2477 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 2478}
2479EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
2480
2481/* Helper function for VIDIOC_S_CTRL compatibility */
ab892bac 2482static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, s32 *val)
0996517c
HV		 2483{
2484 struct v4l2_ctrl *master = ctrl->cluster[0];
2485 int ret;
2486 int i;
2487
eb5b16ef
HV		 2488 ret = validate_new_int(ctrl, val);
2489 if (ret)
2490 return ret;
2491
0996517c
HV		 2492 v4l2_ctrl_lock(ctrl);
2493
2a863793 2494 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2495 for (i = 0; i < master->ncontrols; i++)
2496 if (master->cluster[i])
2a863793 2497 master->cluster[i]->is_new = 0;
0996517c 2498
5626b8c7
HV		 2499 /* For autoclusters with volatiles that are switched from auto to
2500 manual mode we have to update the current volatile values since
2501 those will become the initial manual values after such a switch. */
2502 if (master->is_auto && master->has_volatiles && ctrl == master &&
2503 !is_cur_manual(master) && *val == master->manual_mode_value)
2504 update_from_auto_cluster(master);
0996517c 2505 ctrl->val = *val;
2a863793 2506 ctrl->is_new = 1;
e6402585 2507 ret = try_or_set_cluster(fh, master, true);
0996517c
HV		 2508 *val = ctrl->cur.val;
2509 v4l2_ctrl_unlock(ctrl);
2510 return ret;
2511}
2512
ab892bac
HV		 2513int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2514 struct v4l2_control *control)
0996517c
HV		 2515{
2516 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
2517
2518 if (ctrl == NULL || !type_is_int(ctrl))
2519 return -EINVAL;
2520
7ebbc39f
HV		 2521 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2522 return -EACCES;
2523
ab892bac 2524 return set_ctrl(fh, ctrl, &control->value);
0996517c
HV		 2525}
2526EXPORT_SYMBOL(v4l2_s_ctrl);
2527
2528int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2529{
ab892bac 2530 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 2531}
2532EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
2533
2534int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
2535{
2536 /* It's a driver bug if this happens. */
2537 WARN_ON(!type_is_int(ctrl));
ab892bac 2538 return set_ctrl(NULL, ctrl, &val);
0996517c
HV		 2539}
2540EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
6e239399 2541
3e366149 2542static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev)
6e239399 2543{
3e366149
HG		 2544 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2545
2546 if (ctrl == NULL)
2547 return -EINVAL;
2548
6e239399 2549 v4l2_ctrl_lock(ctrl);
77068d36 2550 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 2551 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 2552 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 2553 struct v4l2_event ev;
c12fcfd6 2554 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 2555
c12fcfd6
HV		 2556 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
2557 changes |= V4L2_EVENT_CTRL_CH_VALUE;
2558 fill_event(&ev, ctrl, changes);
77068d36 2559 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 2560 }
2561 v4l2_ctrl_unlock(ctrl);
3e366149 2562 return 0;
6e239399 2563}
6e239399 2564
3e366149 2565static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 2566{
3e366149
HG		 2567 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2568
6e239399 2569 v4l2_ctrl_lock(ctrl);
77068d36 2570 list_del(&sev->node);
6e239399
HV		 2571 v4l2_ctrl_unlock(ctrl);
2572}
3e366149
HG		 2573
2574void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
2575{
2576 u32 old_changes = old->u.ctrl.changes;
2577
2578 old->u.ctrl = new->u.ctrl;
2579 old->u.ctrl.changes |= old_changes;
2580}
2581EXPORT_SYMBOL(v4l2_ctrl_replace);
2582
2583void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
2584{
2585 new->u.ctrl.changes |= old->u.ctrl.changes;
2586}
2587EXPORT_SYMBOL(v4l2_ctrl_merge);
2588
2589const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
2590 .add = v4l2_ctrl_add_event,
2591 .del = v4l2_ctrl_del_event,
2592 .replace = v4l2_ctrl_replace,
2593 .merge = v4l2_ctrl_merge,
2594};
2595EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 2596
2597int v4l2_ctrl_log_status(struct file *file, void *fh)
2598{
2599 struct video_device *vfd = video_devdata(file);
2600 struct v4l2_fh *vfh = file->private_data;
2601
2602 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
2603 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
2604 vfd->v4l2_dev->name);
2605 return 0;
2606}
2607EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 2608
2609int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
2610 struct v4l2_event_subscription *sub)
2611{
2612 if (sub->type == V4L2_EVENT_CTRL)
3e366149 2613 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 2614 return -EINVAL;
2615}
2616EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
2617
2618unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
2619{
2620 struct v4l2_fh *fh = file->private_data;
2621
2622 if (v4l2_event_pending(fh))
2623 return POLLPRI;
2624 poll_wait(file, &fh->wait, wait);
2625 return 0;
2626}
2627EXPORT_SYMBOL(v4l2_ctrl_poll);
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