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[media] v4l2-ctrls: add a filter function to v4l2_ctrl_add_handler
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / v4l2-core / 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 };
2272ab65
SN		 239 static const char * const camera_auto_focus_range[] = {
240 "Auto",
241 "Normal",
242 "Macro",
243 "Infinity",
244 NULL
245 };
513521ea 246 static const char * const colorfx[] = {
0996517c
HV		 247 "None",
248 "Black & White",
249 "Sepia",
250 "Negative",
251 "Emboss",
252 "Sketch",
064f5096
KD		 253 "Sky Blue",
254 "Grass Green",
255 "Skin Whiten",
0996517c 256 "Vivid",
6491d1ad
SN		 257 "Aqua",
258 "Art Freeze",
259 "Silhouette",
260 "Solarization",
261 "Antique",
262 "Set Cb/Cr",
0996517c
HV		 263 NULL
264 };
e40a0573
SN		 265 static const char * const auto_n_preset_white_balance[] = {
266 "Manual",
267 "Auto",
268 "Incandescent",
269 "Fluorescent",
270 "Fluorescent H",
271 "Horizon",
272 "Daylight",
273 "Flash",
274 "Cloudy",
275 "Shade",
276 NULL,
277 };
7f84ad8b
SN		 278 static const char * const camera_iso_sensitivity_auto[] = {
279 "Manual",
280 "Auto",
281 NULL
282 };
0bf6b7dc
SN		 283 static const char * const scene_mode[] = {
284 "None",
285 "Backlight",
286 "Beach/Snow",
287 "Candle Light",
288 "Dusk/Dawn",
289 "Fall Colors",
290 "Fireworks",
291 "Landscape",
292 "Night",
293 "Party/Indoor",
294 "Portrait",
295 "Sports",
296 "Sunset",
297 "Text",
298 NULL
299 };
513521ea 300 static const char * const tune_preemphasis[] = {
064f5096 301 "No Preemphasis",
f769c260
HV		 302 "50 Microseconds",
303 "75 Microseconds",
0996517c
HV		 304 NULL,
305 };
064f5096
KD		 306 static const char * const header_mode[] = {
307 "Separate Buffer",
308 "Joined With 1st Frame",
309 NULL,
310 };
311 static const char * const multi_slice[] = {
312 "Single",
313 "Max Macroblocks",
314 "Max Bytes",
315 NULL,
316 };
317 static const char * const entropy_mode[] = {
318 "CAVLC",
319 "CABAC",
320 NULL,
321 };
322 static const char * const mpeg_h264_level[] = {
323 "1",
324 "1b",
325 "1.1",
326 "1.2",
327 "1.3",
328 "2",
329 "2.1",
330 "2.2",
331 "3",
332 "3.1",
333 "3.2",
334 "4",
335 "4.1",
336 "4.2",
337 "5",
338 "5.1",
339 NULL,
340 };
341 static const char * const h264_loop_filter[] = {
342 "Enabled",
343 "Disabled",
344 "Disabled at Slice Boundary",
345 NULL,
346 };
347 static const char * const h264_profile[] = {
348 "Baseline",
349 "Constrained Baseline",
350 "Main",
351 "Extended",
352 "High",
353 "High 10",
354 "High 422",
355 "High 444 Predictive",
356 "High 10 Intra",
357 "High 422 Intra",
358 "High 444 Intra",
359 "CAVLC 444 Intra",
360 "Scalable Baseline",
361 "Scalable High",
362 "Scalable High Intra",
363 "Multiview High",
364 NULL,
365 };
366 static const char * const vui_sar_idc[] = {
367 "Unspecified",
368 "1:1",
369 "12:11",
370 "10:11",
371 "16:11",
372 "40:33",
373 "24:11",
374 "20:11",
375 "32:11",
376 "80:33",
377 "18:11",
378 "15:11",
379 "64:33",
380 "160:99",
381 "4:3",
382 "3:2",
383 "2:1",
384 "Extended SAR",
385 NULL,
386 };
387 static const char * const mpeg_mpeg4_level[] = {
388 "0",
389 "0b",
390 "1",
391 "2",
392 "3",
393 "3b",
394 "4",
395 "5",
396 NULL,
397 };
398 static const char * const mpeg4_profile[] = {
399 "Simple",
f769c260 400 "Advanced Simple",
064f5096
KD		 401 "Core",
402 "Simple Scalable",
403 "Advanced Coding Efficency",
404 NULL,
405 };
406
0b159acd
SA		 407 static const char * const flash_led_mode[] = {
408 "Off",
409 "Flash",
410 "Torch",
411 NULL,
412 };
413 static const char * const flash_strobe_source[] = {
414 "Software",
415 "External",
416 NULL,
417 };
0996517c 418
c7361ae1
SN		 419 static const char * const jpeg_chroma_subsampling[] = {
420 "4:4:4",
421 "4:2:2",
422 "4:2:0",
423 "4:1:1",
424 "4:1:0",
425 "Gray",
426 NULL,
427 };
977ebec7
HV		 428 static const char * const dv_tx_mode[] = {
429 "DVI-D",
430 "HDMI",
431 NULL,
432 };
433 static const char * const dv_rgb_range[] = {
434 "Automatic",
435 "RGB limited range (16-235)",
436 "RGB full range (0-255)",
437 NULL,
438 };
439
c7361ae1 440
0996517c
HV		 441 switch (id) {
442 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
443 return mpeg_audio_sampling_freq;
444 case V4L2_CID_MPEG_AUDIO_ENCODING:
445 return mpeg_audio_encoding;
446 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
447 return mpeg_audio_l1_bitrate;
448 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
449 return mpeg_audio_l2_bitrate;
450 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
451 return mpeg_audio_l3_bitrate;
452 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
453 return mpeg_audio_ac3_bitrate;
454 case V4L2_CID_MPEG_AUDIO_MODE:
455 return mpeg_audio_mode;
456 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
457 return mpeg_audio_mode_extension;
458 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
459 return mpeg_audio_emphasis;
460 case V4L2_CID_MPEG_AUDIO_CRC:
461 return mpeg_audio_crc;
24c19a21
HV		 462 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
463 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
464 return mpeg_audio_dec_playback;
0996517c
HV		 465 case V4L2_CID_MPEG_VIDEO_ENCODING:
466 return mpeg_video_encoding;
467 case V4L2_CID_MPEG_VIDEO_ASPECT:
468 return mpeg_video_aspect;
469 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
470 return mpeg_video_bitrate_mode;
471 case V4L2_CID_MPEG_STREAM_TYPE:
472 return mpeg_stream_type;
473 case V4L2_CID_MPEG_STREAM_VBI_FMT:
474 return mpeg_stream_vbi_fmt;
475 case V4L2_CID_POWER_LINE_FREQUENCY:
476 return camera_power_line_frequency;
477 case V4L2_CID_EXPOSURE_AUTO:
478 return camera_exposure_auto;
cf072139
SN		 479 case V4L2_CID_EXPOSURE_METERING:
480 return camera_exposure_metering;
2272ab65
SN		 481 case V4L2_CID_AUTO_FOCUS_RANGE:
482 return camera_auto_focus_range;
0996517c
HV		 483 case V4L2_CID_COLORFX:
484 return colorfx;
e40a0573
SN		 485 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
486 return auto_n_preset_white_balance;
7f84ad8b
SN		 487 case V4L2_CID_ISO_SENSITIVITY_AUTO:
488 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 489 case V4L2_CID_SCENE_MODE:
490 return scene_mode;
0996517c
HV		 491 case V4L2_CID_TUNE_PREEMPHASIS:
492 return tune_preemphasis;
0b159acd
SA		 493 case V4L2_CID_FLASH_LED_MODE:
494 return flash_led_mode;
495 case V4L2_CID_FLASH_STROBE_SOURCE:
496 return flash_strobe_source;
064f5096
KD		 497 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
498 return header_mode;
499 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
500 return multi_slice;
501 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
502 return entropy_mode;
503 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
504 return mpeg_h264_level;
505 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
506 return h264_loop_filter;
507 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
508 return h264_profile;
509 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
510 return vui_sar_idc;
511 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
512 return mpeg_mpeg4_level;
513 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
514 return mpeg4_profile;
c7361ae1
SN		 515 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
516 return jpeg_chroma_subsampling;
977ebec7
HV		 517 case V4L2_CID_DV_TX_MODE:
518 return dv_tx_mode;
519 case V4L2_CID_DV_TX_RGB_RANGE:
520 case V4L2_CID_DV_RX_RGB_RANGE:
521 return dv_rgb_range;
c7361ae1 522
0996517c
HV		 523 default:
524 return NULL;
525 }
526}
527EXPORT_SYMBOL(v4l2_ctrl_get_menu);
528
529/* Return the control name. */
530const char *v4l2_ctrl_get_name(u32 id)
531{
532 switch (id) {
533 /* USER controls */
6c8d6111 534 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 535 case V4L2_CID_USER_CLASS: return "User Controls";
536 case V4L2_CID_BRIGHTNESS: return "Brightness";
537 case V4L2_CID_CONTRAST: return "Contrast";
538 case V4L2_CID_SATURATION: return "Saturation";
539 case V4L2_CID_HUE: return "Hue";
540 case V4L2_CID_AUDIO_VOLUME: return "Volume";
541 case V4L2_CID_AUDIO_BALANCE: return "Balance";
542 case V4L2_CID_AUDIO_BASS: return "Bass";
543 case V4L2_CID_AUDIO_TREBLE: return "Treble";
544 case V4L2_CID_AUDIO_MUTE: return "Mute";
545 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 546 case V4L2_CID_BLACK_LEVEL: return "Black Level";
547 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
548 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
549 case V4L2_CID_RED_BALANCE: return "Red Balance";
550 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
551 case V4L2_CID_GAMMA: return "Gamma";
552 case V4L2_CID_EXPOSURE: return "Exposure";
553 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
554 case V4L2_CID_GAIN: return "Gain";
555 case V4L2_CID_HFLIP: return "Horizontal Flip";
556 case V4L2_CID_VFLIP: return "Vertical Flip";
557 case V4L2_CID_HCENTER: return "Horizontal Center";
558 case V4L2_CID_VCENTER: return "Vertical Center";
559 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
560 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
561 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
562 case V4L2_CID_SHARPNESS: return "Sharpness";
563 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
564 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 565 case V4L2_CID_COLOR_KILLER: return "Color Killer";
566 case V4L2_CID_COLORFX: return "Color Effects";
567 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
568 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
569 case V4L2_CID_ROTATE: return "Rotate";
570 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 571 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 572 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
573 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 574 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
575 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 576 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 577 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c
HV		 578
579 /* MPEG controls */
6c8d6111 580 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 581 case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
582 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
583 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
584 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
585 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
586 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 587 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
588 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
589 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 590 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 591 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
592 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
593 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
594 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
595 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 596 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 597 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
598 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
599 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
600 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
601 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 602 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
603 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 604 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
605 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
606 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
607 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
608 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
609 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
610 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
611 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
612 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 613 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 614 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 615 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 616 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
617 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 618 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 619 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
620 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
621 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 622 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 623 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 624 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
625 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 626 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
627 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
628 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 629 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
630 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 631 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
632 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
633 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
634 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 635 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
636 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 637 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
638 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
639 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
640 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
641 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
642 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
643 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
644 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
645 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
646 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 647 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
648 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 649 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
650 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
651 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
652 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
653 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 654 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
655 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
656 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 657 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 658 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
659 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
0996517c
HV		 660
661 /* CAMERA controls */
6c8d6111 662 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 663 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
664 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
665 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
666 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
667 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
668 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
669 case V4L2_CID_PAN_RESET: return "Pan, Reset";
670 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
671 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
672 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
673 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
674 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 675 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 676 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
677 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
678 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
679 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 680 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
681 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 682 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 683 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 684 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 685 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 686 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
687 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 688 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 689 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 690 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 691 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
692 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
693 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
694 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
0996517c
HV		 695
696 /* FM Radio Modulator control */
6c8d6111 697 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 698 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
699 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
700 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
701 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
702 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
703 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
704 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
705 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
706 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 707 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 708 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
709 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
710 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
711 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
712 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
713 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
714 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 715 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 716 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
717 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
718
0b159acd 719 /* Flash controls */
f08aacf8
HV		 720 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
721 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
722 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 723 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 724 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
725 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
726 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
727 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
728 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
729 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 730 case V4L2_CID_FLASH_FAULT: return "Faults";
731 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 732 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 733
c7361ae1
SN		 734 /* JPEG encoder controls */
735 /* Keep the order of the 'case's the same as in videodev2.h! */
736 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
737 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
738 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
739 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
740 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
741
8c9d236e
SA		 742 /* Image source controls */
743 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
744 case V4L2_CID_VBLANK: return "Vertical Blanking";
745 case V4L2_CID_HBLANK: return "Horizontal Blanking";
746 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
747
c643ee13
SA		 748 /* Image processing controls */
749 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
750 case V4L2_CID_LINK_FREQ: return "Link Frequency";
751 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
752
977ebec7
HV		 753 /* DV controls */
754 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
755 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
756 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
757 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
758 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
759 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
760 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
761 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
762
0996517c
HV		 763 default:
764 return NULL;
765 }
766}
767EXPORT_SYMBOL(v4l2_ctrl_get_name);
768
769void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
770 s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags)
771{
772 *name = v4l2_ctrl_get_name(id);
773 *flags = 0;
774
775 switch (id) {
776 case V4L2_CID_AUDIO_MUTE:
777 case V4L2_CID_AUDIO_LOUDNESS:
778 case V4L2_CID_AUTO_WHITE_BALANCE:
779 case V4L2_CID_AUTOGAIN:
780 case V4L2_CID_HFLIP:
781 case V4L2_CID_VFLIP:
782 case V4L2_CID_HUE_AUTO:
783 case V4L2_CID_CHROMA_AGC:
784 case V4L2_CID_COLOR_KILLER:
a2f8b84f 785 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 786 case V4L2_CID_MPEG_AUDIO_MUTE:
787 case V4L2_CID_MPEG_VIDEO_MUTE:
788 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
789 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
790 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
791 case V4L2_CID_FOCUS_AUTO:
792 case V4L2_CID_PRIVACY:
793 case V4L2_CID_AUDIO_LIMITER_ENABLED:
794 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
795 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 796 case V4L2_CID_ILLUMINATORS_1:
797 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 798 case V4L2_CID_FLASH_STROBE_STATUS:
799 case V4L2_CID_FLASH_CHARGE:
800 case V4L2_CID_FLASH_READY:
064f5096
KD		 801 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
802 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
803 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
804 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
805 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
806 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
807 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
44d44a1a 808 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 809 case V4L2_CID_IMAGE_STABILIZATION:
0996517c
HV		 810 *type = V4L2_CTRL_TYPE_BOOLEAN;
811 *min = 0;
812 *max = *step = 1;
813 break;
814 case V4L2_CID_PAN_RESET:
815 case V4L2_CID_TILT_RESET:
0b159acd
SA		 816 case V4L2_CID_FLASH_STROBE:
817 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 818 case V4L2_CID_AUTO_FOCUS_START:
819 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c
HV		 820 *type = V4L2_CTRL_TYPE_BUTTON;
821 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
822 *min = *max = *step = *def = 0;
823 break;
824 case V4L2_CID_POWER_LINE_FREQUENCY:
825 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
826 case V4L2_CID_MPEG_AUDIO_ENCODING:
827 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
828 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
829 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
830 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
831 case V4L2_CID_MPEG_AUDIO_MODE:
832 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
833 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
834 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 835 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
836 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 837 case V4L2_CID_MPEG_VIDEO_ENCODING:
838 case V4L2_CID_MPEG_VIDEO_ASPECT:
839 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
840 case V4L2_CID_MPEG_STREAM_TYPE:
841 case V4L2_CID_MPEG_STREAM_VBI_FMT:
842 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 843 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 844 case V4L2_CID_COLORFX:
e40a0573 845 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 846 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 847 case V4L2_CID_FLASH_LED_MODE:
848 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 849 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
850 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
851 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
852 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
853 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
854 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
855 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
856 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
857 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 858 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 859 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 860 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 861 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 862 case V4L2_CID_DV_TX_MODE:
863 case V4L2_CID_DV_TX_RGB_RANGE:
864 case V4L2_CID_DV_RX_RGB_RANGE:
0996517c
HV		 865 *type = V4L2_CTRL_TYPE_MENU;
866 break;
c643ee13
SA		 867 case V4L2_CID_LINK_FREQ:
868 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
869 break;
0996517c
HV		 870 case V4L2_CID_RDS_TX_PS_NAME:
871 case V4L2_CID_RDS_TX_RADIO_TEXT:
872 *type = V4L2_CTRL_TYPE_STRING;
873 break;
7f84ad8b 874 case V4L2_CID_ISO_SENSITIVITY:
d58083c9
SN		 875 case V4L2_CID_AUTO_EXPOSURE_BIAS:
876 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
877 break;
0996517c
HV		 878 case V4L2_CID_USER_CLASS:
879 case V4L2_CID_CAMERA_CLASS:
880 case V4L2_CID_MPEG_CLASS:
881 case V4L2_CID_FM_TX_CLASS:
0b159acd 882 case V4L2_CID_FLASH_CLASS:
c7361ae1 883 case V4L2_CID_JPEG_CLASS:
8c9d236e 884 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 885 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 886 case V4L2_CID_DV_CLASS:
0996517c
HV		 887 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
888 /* You can neither read not write these */
889 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
890 *min = *max = *step = *def = 0;
891 break;
892 case V4L2_CID_BG_COLOR:
893 *type = V4L2_CTRL_TYPE_INTEGER;
894 *step = 1;
895 *min = 0;
896 /* Max is calculated as RGB888 that is 2^24 */
897 *max = 0xFFFFFF;
898 break;
0b159acd 899 case V4L2_CID_FLASH_FAULT:
c7361ae1 900 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 901 case V4L2_CID_3A_LOCK:
2272ab65 902 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 903 case V4L2_CID_DV_TX_HOTPLUG:
904 case V4L2_CID_DV_TX_RXSENSE:
905 case V4L2_CID_DV_TX_EDID_PRESENT:
906 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 907 *type = V4L2_CTRL_TYPE_BITMASK;
908 break;
064f5096
KD		 909 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
910 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
911 *type = V4L2_CTRL_TYPE_INTEGER;
912 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
913 break;
24c19a21
HV		 914 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
915 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
c643ee13
SA		 916 *flags |= V4L2_CTRL_FLAG_VOLATILE;
917 /* Fall through */
918 case V4L2_CID_PIXEL_RATE:
24c19a21 919 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 920 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
ca576811 921 *min = *max = *step = *def = 0;
24c19a21 922 break;
0996517c
HV		 923 default:
924 *type = V4L2_CTRL_TYPE_INTEGER;
925 break;
926 }
927 switch (id) {
928 case V4L2_CID_MPEG_AUDIO_ENCODING:
929 case V4L2_CID_MPEG_AUDIO_MODE:
930 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
931 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
932 case V4L2_CID_MPEG_STREAM_TYPE:
933 *flags |= V4L2_CTRL_FLAG_UPDATE;
934 break;
935 case V4L2_CID_AUDIO_VOLUME:
936 case V4L2_CID_AUDIO_BALANCE:
937 case V4L2_CID_AUDIO_BASS:
938 case V4L2_CID_AUDIO_TREBLE:
939 case V4L2_CID_BRIGHTNESS:
940 case V4L2_CID_CONTRAST:
941 case V4L2_CID_SATURATION:
942 case V4L2_CID_HUE:
943 case V4L2_CID_RED_BALANCE:
944 case V4L2_CID_BLUE_BALANCE:
945 case V4L2_CID_GAMMA:
946 case V4L2_CID_SHARPNESS:
947 case V4L2_CID_CHROMA_GAIN:
948 case V4L2_CID_RDS_TX_DEVIATION:
949 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
950 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
951 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
952 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
953 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
954 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
955 case V4L2_CID_PILOT_TONE_DEVIATION:
956 case V4L2_CID_PILOT_TONE_FREQUENCY:
957 case V4L2_CID_TUNE_POWER_LEVEL:
958 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
959 *flags |= V4L2_CTRL_FLAG_SLIDER;
960 break;
961 case V4L2_CID_PAN_RELATIVE:
962 case V4L2_CID_TILT_RELATIVE:
963 case V4L2_CID_FOCUS_RELATIVE:
964 case V4L2_CID_IRIS_RELATIVE:
965 case V4L2_CID_ZOOM_RELATIVE:
966 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
967 break;
0b159acd 968 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 969 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 970 case V4L2_CID_FLASH_READY:
977ebec7
HV		 971 case V4L2_CID_DV_TX_HOTPLUG:
972 case V4L2_CID_DV_TX_RXSENSE:
973 case V4L2_CID_DV_TX_EDID_PRESENT:
974 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 975 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
976 break;
0996517c
HV		 977 }
978}
979EXPORT_SYMBOL(v4l2_ctrl_fill);
980
981/* Helper function to determine whether the control type is compatible with
982 VIDIOC_G/S_CTRL. */
983static bool type_is_int(const struct v4l2_ctrl *ctrl)
984{
985 switch (ctrl->type) {
986 case V4L2_CTRL_TYPE_INTEGER64:
987 case V4L2_CTRL_TYPE_STRING:
988 /* Nope, these need v4l2_ext_control */
989 return false;
990 default:
991 return true;
992 }
993}
994
6e239399
HV		 995static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
996{
997 memset(ev->reserved, 0, sizeof(ev->reserved));
998 ev->type = V4L2_EVENT_CTRL;
999 ev->id = ctrl->id;
1000 ev->u.ctrl.changes = changes;
1001 ev->u.ctrl.type = ctrl->type;
1002 ev->u.ctrl.flags = ctrl->flags;
1003 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
1004 ev->u.ctrl.value64 = 0;
1005 else
1006 ev->u.ctrl.value64 = ctrl->cur.val64;
1007 ev->u.ctrl.minimum = ctrl->minimum;
1008 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1009 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1010 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1011 ev->u.ctrl.step = 1;
1012 else
1013 ev->u.ctrl.step = ctrl->step;
1014 ev->u.ctrl.default_value = ctrl->default_value;
1015}
1016
1017static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1018{
1019 struct v4l2_event ev;
77068d36 1020 struct v4l2_subscribed_event *sev;
6e239399 1021
77068d36 1022 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1023 return;
6e239399
HV		 1024 fill_event(&ev, ctrl, changes);
1025
77068d36 1026 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1027 if (sev->fh != fh ||
1028 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1029 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1030}
1031
0996517c
HV		 1032/* Helper function: copy the current control value back to the caller */
1033static int cur_to_user(struct v4l2_ext_control *c,
1034 struct v4l2_ctrl *ctrl)
1035{
1036 u32 len;
1037
1038 switch (ctrl->type) {
1039 case V4L2_CTRL_TYPE_STRING:
1040 len = strlen(ctrl->cur.string);
1041 if (c->size < len + 1) {
1042 c->size = len + 1;
1043 return -ENOSPC;
1044 }
1045 return copy_to_user(c->string, ctrl->cur.string,
1046 len + 1) ? -EFAULT : 0;
1047 case V4L2_CTRL_TYPE_INTEGER64:
1048 c->value64 = ctrl->cur.val64;
1049 break;
1050 default:
1051 c->value = ctrl->cur.val;
1052 break;
1053 }
1054 return 0;
1055}
1056
1057/* Helper function: copy the caller-provider value as the new control value */
1058static int user_to_new(struct v4l2_ext_control *c,
1059 struct v4l2_ctrl *ctrl)
1060{
1061 int ret;
1062 u32 size;
1063
2a863793 1064 ctrl->is_new = 1;
0996517c
HV		 1065 switch (ctrl->type) {
1066 case V4L2_CTRL_TYPE_INTEGER64:
1067 ctrl->val64 = c->value64;
1068 break;
1069 case V4L2_CTRL_TYPE_STRING:
1070 size = c->size;
1071 if (size == 0)
1072 return -ERANGE;
1073 if (size > ctrl->maximum + 1)
1074 size = ctrl->maximum + 1;
1075 ret = copy_from_user(ctrl->string, c->string, size);
1076 if (!ret) {
1077 char last = ctrl->string[size - 1];
1078
1079 ctrl->string[size - 1] = 0;
1080 /* If the string was longer than ctrl->maximum,
1081 then return an error. */
1082 if (strlen(ctrl->string) == ctrl->maximum && last)
1083 return -ERANGE;
1084 }
1085 return ret ? -EFAULT : 0;
1086 default:
1087 ctrl->val = c->value;
1088 break;
1089 }
1090 return 0;
1091}
1092
1093/* Helper function: copy the new control value back to the caller */
1094static int new_to_user(struct v4l2_ext_control *c,
1095 struct v4l2_ctrl *ctrl)
1096{
1097 u32 len;
1098
1099 switch (ctrl->type) {
1100 case V4L2_CTRL_TYPE_STRING:
1101 len = strlen(ctrl->string);
1102 if (c->size < len + 1) {
1103 c->size = ctrl->maximum + 1;
1104 return -ENOSPC;
1105 }
1106 return copy_to_user(c->string, ctrl->string,
1107 len + 1) ? -EFAULT : 0;
1108 case V4L2_CTRL_TYPE_INTEGER64:
1109 c->value64 = ctrl->val64;
1110 break;
1111 default:
1112 c->value = ctrl->val;
1113 break;
1114 }
1115 return 0;
1116}
1117
1118/* Copy the new value to the current value. */
ab892bac
HV		 1119static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
1120 bool update_inactive)
0996517c 1121{
6e239399
HV		 1122 bool changed = false;
1123
0996517c
HV		 1124 if (ctrl == NULL)
1125 return;
1126 switch (ctrl->type) {
6e239399
HV		 1127 case V4L2_CTRL_TYPE_BUTTON:
1128 changed = true;
1129 break;
0996517c
HV		 1130 case V4L2_CTRL_TYPE_STRING:
1131 /* strings are always 0-terminated */
6e239399 1132 changed = strcmp(ctrl->string, ctrl->cur.string);
0996517c
HV		 1133 strcpy(ctrl->cur.string, ctrl->string);
1134 break;
1135 case V4L2_CTRL_TYPE_INTEGER64:
6e239399 1136 changed = ctrl->val64 != ctrl->cur.val64;
0996517c
HV		 1137 ctrl->cur.val64 = ctrl->val64;
1138 break;
1139 default:
6e239399 1140 changed = ctrl->val != ctrl->cur.val;
0996517c
HV		 1141 ctrl->cur.val = ctrl->val;
1142 break;
1143 }
72d877ca 1144 if (update_inactive) {
5626b8c7
HV		 1145 /* Note: update_inactive can only be true for auto clusters. */
1146 ctrl->flags &=
1147 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1148 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1149 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1150 if (ctrl->cluster[0]->has_volatiles)
1151 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1152 }
1249a3a8 1153 fh = NULL;
72d877ca 1154 }
639884a6
HV		 1155 if (changed || update_inactive) {
1156 /* If a control was changed that was not one of the controls
1157 modified by the application, then send the event to all. */
1158 if (!ctrl->is_new)
1159 fh = NULL;
6e239399
HV		 1160 send_event(fh, ctrl,
1161 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) |
1162 (update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
639884a6 1163 }
0996517c
HV		 1164}
1165
1166/* Copy the current value to the new value */
1167static void cur_to_new(struct v4l2_ctrl *ctrl)
1168{
1169 if (ctrl == NULL)
1170 return;
1171 switch (ctrl->type) {
1172 case V4L2_CTRL_TYPE_STRING:
1173 /* strings are always 0-terminated */
1174 strcpy(ctrl->string, ctrl->cur.string);
1175 break;
1176 case V4L2_CTRL_TYPE_INTEGER64:
1177 ctrl->val64 = ctrl->cur.val64;
1178 break;
1179 default:
1180 ctrl->val = ctrl->cur.val;
1181 break;
1182 }
1183}
1184
1185/* Return non-zero if one or more of the controls in the cluster has a new
1186 value that differs from the current value. */
1187static int cluster_changed(struct v4l2_ctrl *master)
1188{
1189 int diff = 0;
1190 int i;
1191
1192 for (i = 0; !diff && i < master->ncontrols; i++) {
1193 struct v4l2_ctrl *ctrl = master->cluster[i];
1194
1195 if (ctrl == NULL)
1196 continue;
1197 switch (ctrl->type) {
1198 case V4L2_CTRL_TYPE_BUTTON:
1199 /* Button controls are always 'different' */
1200 return 1;
1201 case V4L2_CTRL_TYPE_STRING:
1202 /* strings are always 0-terminated */
1203 diff = strcmp(ctrl->string, ctrl->cur.string);
1204 break;
1205 case V4L2_CTRL_TYPE_INTEGER64:
1206 diff = ctrl->val64 != ctrl->cur.val64;
1207 break;
1208 default:
1209 diff = ctrl->val != ctrl->cur.val;
1210 break;
1211 }
1212 }
1213 return diff;
1214}
1215
03d5285b
LP		 1216/* Validate a new control */
1217static int validate_new(const struct v4l2_ctrl *ctrl,
1218 struct v4l2_ext_control *c)
0996517c 1219{
03d5285b 1220 size_t len;
0996517c 1221 u32 offset;
03d5285b 1222 s32 val;
0996517c
HV		 1223
1224 switch (ctrl->type) {
1225 case V4L2_CTRL_TYPE_INTEGER:
1226 /* Round towards the closest legal value */
03d5285b
LP		 1227 val = c->value + ctrl->step / 2;
1228 val = clamp(val, ctrl->minimum, ctrl->maximum);
0996517c
HV		 1229 offset = val - ctrl->minimum;
1230 offset = ctrl->step * (offset / ctrl->step);
03d5285b 1231 c->value = ctrl->minimum + offset;
0996517c
HV		 1232 return 0;
1233
1234 case V4L2_CTRL_TYPE_BOOLEAN:
03d5285b 1235 c->value = !!c->value;
0996517c
HV		 1236 return 0;
1237
1238 case V4L2_CTRL_TYPE_MENU:
ce580fe5 1239 case V4L2_CTRL_TYPE_INTEGER_MENU:
03d5285b 1240 if (c->value < ctrl->minimum || c->value > ctrl->maximum)
0996517c 1241 return -ERANGE;
03d5285b 1242 if (ctrl->menu_skip_mask & (1 << c->value))
ce580fe5
SA		 1243 return -EINVAL;
1244 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
03d5285b 1245 ctrl->qmenu[c->value][0] == '\0')
0996517c
HV		 1246 return -EINVAL;
1247 return 0;
1248
fa4d7096 1249 case V4L2_CTRL_TYPE_BITMASK:
03d5285b 1250 c->value &= ctrl->maximum;
fa4d7096
HV		 1251 return 0;
1252
0996517c
HV		 1253 case V4L2_CTRL_TYPE_BUTTON:
1254 case V4L2_CTRL_TYPE_CTRL_CLASS:
03d5285b 1255 c->value = 0;
0996517c
HV		 1256 return 0;
1257
1258 case V4L2_CTRL_TYPE_INTEGER64:
1259 return 0;
1260
1261 case V4L2_CTRL_TYPE_STRING:
03d5285b 1262 len = strlen(c->string);
0996517c
HV		 1263 if (len < ctrl->minimum)
1264 return -ERANGE;
1265 if ((len - ctrl->minimum) % ctrl->step)
1266 return -ERANGE;
1267 return 0;
1268
1269 default:
1270 return -EINVAL;
1271 }
1272}
1273
1274static inline u32 node2id(struct list_head *node)
1275{
1276 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1277}
1278
1279/* Set the handler's error code if it wasn't set earlier already */
1280static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1281{
1282 if (hdl->error == 0)
1283 hdl->error = err;
1284 return err;
1285}
1286
1287/* Initialize the handler */
1288int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl,
1289 unsigned nr_of_controls_hint)
1290{
77e7c4e6
SA		 1291 hdl->lock = &hdl->_lock;
1292 mutex_init(hdl->lock);
0996517c
HV		 1293 INIT_LIST_HEAD(&hdl->ctrls);
1294 INIT_LIST_HEAD(&hdl->ctrl_refs);
1295 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1296 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1297 GFP_KERNEL);
0996517c
HV		 1298 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1299 return hdl->error;
1300}
1301EXPORT_SYMBOL(v4l2_ctrl_handler_init);
1302
1303/* Free all controls and control refs */
1304void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1305{
1306 struct v4l2_ctrl_ref *ref, *next_ref;
1307 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1308 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1309
1310 if (hdl == NULL || hdl->buckets == NULL)
1311 return;
1312
77e7c4e6 1313 mutex_lock(hdl->lock);
0996517c
HV		 1314 /* Free all nodes */
1315 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1316 list_del(&ref->node);
1317 kfree(ref);
1318 }
1319 /* Free all controls owned by the handler */
1320 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1321 list_del(&ctrl->node);
77068d36
HV		 1322 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1323 list_del(&sev->node);
0996517c
HV		 1324 kfree(ctrl);
1325 }
1326 kfree(hdl->buckets);
1327 hdl->buckets = NULL;
1328 hdl->cached = NULL;
1329 hdl->error = 0;
77e7c4e6 1330 mutex_unlock(hdl->lock);
0996517c
HV		 1331}
1332EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1333
1334/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1335 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1336 with applications that do not use the NEXT_CTRL flag.
1337
1338 We just find the n-th private user control. It's O(N), but that should not
1339 be an issue in this particular case. */
1340static struct v4l2_ctrl_ref *find_private_ref(
1341 struct v4l2_ctrl_handler *hdl, u32 id)
1342{
1343 struct v4l2_ctrl_ref *ref;
1344
1345 id -= V4L2_CID_PRIVATE_BASE;
1346 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1347 /* Search for private user controls that are compatible with
1348 VIDIOC_G/S_CTRL. */
1349 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1350 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
1351 if (!type_is_int(ref->ctrl))
1352 continue;
1353 if (id == 0)
1354 return ref;
1355 id--;
1356 }
1357 }
1358 return NULL;
1359}
1360
1361/* Find a control with the given ID. */
1362static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1363{
1364 struct v4l2_ctrl_ref *ref;
1365 int bucket;
1366
1367 id &= V4L2_CTRL_ID_MASK;
1368
1369 /* Old-style private controls need special handling */
1370 if (id >= V4L2_CID_PRIVATE_BASE)
1371 return find_private_ref(hdl, id);
1372 bucket = id % hdl->nr_of_buckets;
1373
1374 /* Simple optimization: cache the last control found */
1375 if (hdl->cached && hdl->cached->ctrl->id == id)
1376 return hdl->cached;
1377
1378 /* Not in cache, search the hash */
1379 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1380 while (ref && ref->ctrl->id != id)
1381 ref = ref->next;
1382
1383 if (ref)
1384 hdl->cached = ref; /* cache it! */
1385 return ref;
1386}
1387
1388/* Find a control with the given ID. Take the handler's lock first. */
1389static struct v4l2_ctrl_ref *find_ref_lock(
1390 struct v4l2_ctrl_handler *hdl, u32 id)
1391{
1392 struct v4l2_ctrl_ref *ref = NULL;
1393
1394 if (hdl) {
77e7c4e6 1395 mutex_lock(hdl->lock);
0996517c 1396 ref = find_ref(hdl, id);
77e7c4e6 1397 mutex_unlock(hdl->lock);
0996517c
HV		 1398 }
1399 return ref;
1400}
1401
1402/* Find a control with the given ID. */
1403struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1404{
1405 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1406
1407 return ref ? ref->ctrl : NULL;
1408}
1409EXPORT_SYMBOL(v4l2_ctrl_find);
1410
1411/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1412static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1413 struct v4l2_ctrl *ctrl)
1414{
1415 struct v4l2_ctrl_ref *ref;
1416 struct v4l2_ctrl_ref *new_ref;
1417 u32 id = ctrl->id;
1418 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1419 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1420
1421 /* Automatically add the control class if it is not yet present. */
1422 if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
1423 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1424 return hdl->error;
1425
1426 if (hdl->error)
1427 return hdl->error;
1428
1429 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1430 if (!new_ref)
1431 return handler_set_err(hdl, -ENOMEM);
1432 new_ref->ctrl = ctrl;
1433 if (ctrl->handler == hdl) {
1434 /* By default each control starts in a cluster of its own.
1435 new_ref->ctrl is basically a cluster array with one
1436 element, so that's perfect to use as the cluster pointer.
1437 But only do this for the handler that owns the control. */
1438 ctrl->cluster = &new_ref->ctrl;
1439 ctrl->ncontrols = 1;
1440 }
1441
1442 INIT_LIST_HEAD(&new_ref->node);
1443
77e7c4e6 1444 mutex_lock(hdl->lock);
0996517c
HV		 1445
1446 /* Add immediately at the end of the list if the list is empty, or if
1447 the last element in the list has a lower ID.
1448 This ensures that when elements are added in ascending order the
1449 insertion is an O(1) operation. */
1450 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1451 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1452 goto insert_in_hash;
1453 }
1454
1455 /* Find insert position in sorted list */
1456 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1457 if (ref->ctrl->id < id)
1458 continue;
1459 /* Don't add duplicates */
1460 if (ref->ctrl->id == id) {
1461 kfree(new_ref);
1462 goto unlock;
1463 }
1464 list_add(&new_ref->node, ref->node.prev);
1465 break;
1466 }
1467
1468insert_in_hash:
1469 /* Insert the control node in the hash */
1470 new_ref->next = hdl->buckets[bucket];
1471 hdl->buckets[bucket] = new_ref;
1472
1473unlock:
77e7c4e6 1474 mutex_unlock(hdl->lock);
0996517c
HV		 1475 return 0;
1476}
1477
1478/* Add a new control */
1479static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1480 const struct v4l2_ctrl_ops *ops,
1481 u32 id, const char *name, enum v4l2_ctrl_type type,
1482 s32 min, s32 max, u32 step, s32 def,
ce580fe5
SA		 1483 u32 flags, const char * const *qmenu,
1484 const s64 *qmenu_int, void *priv)
0996517c
HV		 1485{
1486 struct v4l2_ctrl *ctrl;
1487 unsigned sz_extra = 0;
1488
1489 if (hdl->error)
1490 return NULL;
1491
1492 /* Sanity checks */
1493 if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1494 (type == V4L2_CTRL_TYPE_INTEGER && step == 0) ||
fa4d7096 1495 (type == V4L2_CTRL_TYPE_BITMASK && max == 0) ||
0996517c 1496 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
ce580fe5 1497 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL) ||
0996517c
HV		 1498 (type == V4L2_CTRL_TYPE_STRING && max == 0)) {
1499 handler_set_err(hdl, -ERANGE);
1500 return NULL;
1501 }
fa4d7096
HV		 1502 if (type != V4L2_CTRL_TYPE_BITMASK && max < min) {
1503 handler_set_err(hdl, -ERANGE);
1504 return NULL;
1505 }
02ac0480
HV		 1506 if ((type == V4L2_CTRL_TYPE_INTEGER ||
1507 type == V4L2_CTRL_TYPE_MENU ||
ce580fe5 1508 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
02ac0480
HV		 1509 type == V4L2_CTRL_TYPE_BOOLEAN) &&
1510 (def < min || def > max)) {
1511 handler_set_err(hdl, -ERANGE);
1512 return NULL;
1513 }
fa4d7096
HV		 1514 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1515 handler_set_err(hdl, -ERANGE);
1516 return NULL;
1517 }
0996517c
HV		 1518
1519 if (type == V4L2_CTRL_TYPE_BUTTON)
1520 flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1521 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1522 flags |= V4L2_CTRL_FLAG_READ_ONLY;
1523 else if (type == V4L2_CTRL_TYPE_STRING)
1524 sz_extra += 2 * (max + 1);
1525
1526 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1527 if (ctrl == NULL) {
1528 handler_set_err(hdl, -ENOMEM);
1529 return NULL;
1530 }
1531
1532 INIT_LIST_HEAD(&ctrl->node);
77068d36 1533 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1534 ctrl->handler = hdl;
1535 ctrl->ops = ops;
1536 ctrl->id = id;
1537 ctrl->name = name;
1538 ctrl->type = type;
1539 ctrl->flags = flags;
1540 ctrl->minimum = min;
1541 ctrl->maximum = max;
1542 ctrl->step = step;
ce580fe5
SA		 1543 if (type == V4L2_CTRL_TYPE_MENU)
1544 ctrl->qmenu = qmenu;
1545 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1546 ctrl->qmenu_int = qmenu_int;
0996517c
HV		 1547 ctrl->priv = priv;
1548 ctrl->cur.val = ctrl->val = ctrl->default_value = def;
1549
1550 if (ctrl->type == V4L2_CTRL_TYPE_STRING) {
1551 ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1);
1552 ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1);
1553 if (ctrl->minimum)
1554 memset(ctrl->cur.string, ' ', ctrl->minimum);
1555 }
1556 if (handler_new_ref(hdl, ctrl)) {
1557 kfree(ctrl);
1558 return NULL;
1559 }
77e7c4e6 1560 mutex_lock(hdl->lock);
0996517c 1561 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 1562 mutex_unlock(hdl->lock);
0996517c
HV		 1563 return ctrl;
1564}
1565
1566struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
1567 const struct v4l2_ctrl_config *cfg, void *priv)
1568{
1569 bool is_menu;
1570 struct v4l2_ctrl *ctrl;
1571 const char *name = cfg->name;
513521ea 1572 const char * const *qmenu = cfg->qmenu;
ce580fe5 1573 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 1574 enum v4l2_ctrl_type type = cfg->type;
1575 u32 flags = cfg->flags;
1576 s32 min = cfg->min;
1577 s32 max = cfg->max;
1578 u32 step = cfg->step;
1579 s32 def = cfg->def;
1580
1581 if (name == NULL)
1582 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
1583 &def, &flags);
1584
ce580fe5
SA		 1585 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
1586 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 1587 if (is_menu)
1588 WARN_ON(step);
1589 else
1590 WARN_ON(cfg->menu_skip_mask);
ce580fe5 1591 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 1592 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 1593 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
1594 qmenu_int == NULL) {
1595 handler_set_err(hdl, -EINVAL);
1596 return NULL;
1597 }
0996517c
HV		 1598
1599 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name,
1600 type, min, max,
1601 is_menu ? cfg->menu_skip_mask : step,
ce580fe5 1602 def, flags, qmenu, qmenu_int, priv);
88365105 1603 if (ctrl)
0996517c 1604 ctrl->is_private = cfg->is_private;
0996517c
HV		 1605 return ctrl;
1606}
1607EXPORT_SYMBOL(v4l2_ctrl_new_custom);
1608
1609/* Helper function for standard non-menu controls */
1610struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
1611 const struct v4l2_ctrl_ops *ops,
1612 u32 id, s32 min, s32 max, u32 step, s32 def)
1613{
1614 const char *name;
1615 enum v4l2_ctrl_type type;
1616 u32 flags;
1617
1618 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
ce580fe5
SA		 1619 if (type == V4L2_CTRL_TYPE_MENU
1620 || type == V4L2_CTRL_TYPE_INTEGER_MENU) {
0996517c
HV		 1621 handler_set_err(hdl, -EINVAL);
1622 return NULL;
1623 }
1624 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1625 min, max, step, def, flags, NULL, NULL, NULL);
0996517c
HV		 1626}
1627EXPORT_SYMBOL(v4l2_ctrl_new_std);
1628
1629/* Helper function for standard menu controls */
1630struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
1631 const struct v4l2_ctrl_ops *ops,
1632 u32 id, s32 max, s32 mask, s32 def)
1633{
513521ea 1634 const char * const *qmenu = v4l2_ctrl_get_menu(id);
0996517c
HV		 1635 const char *name;
1636 enum v4l2_ctrl_type type;
1637 s32 min;
1638 s32 step;
1639 u32 flags;
1640
1641 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1642 if (type != V4L2_CTRL_TYPE_MENU) {
1643 handler_set_err(hdl, -EINVAL);
1644 return NULL;
1645 }
1646 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1647 0, max, mask, def, flags, qmenu, NULL, NULL);
0996517c
HV		 1648}
1649EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
1650
515f3287
SN		 1651/* Helper function for standard integer menu controls */
1652struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
1653 const struct v4l2_ctrl_ops *ops,
1654 u32 id, s32 max, s32 def, const s64 *qmenu_int)
1655{
1656 const char *name;
1657 enum v4l2_ctrl_type type;
1658 s32 min;
1659 s32 step;
1660 u32 flags;
1661
1662 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1663 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
1664 handler_set_err(hdl, -EINVAL);
1665 return NULL;
1666 }
1667 return v4l2_ctrl_new(hdl, ops, id, name, type,
1668 0, max, 0, def, flags, NULL, qmenu_int, NULL);
1669}
1670EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
1671
0996517c
HV		 1672/* Add a control from another handler to this handler */
1673struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
1674 struct v4l2_ctrl *ctrl)
1675{
1676 if (hdl == NULL || hdl->error)
1677 return NULL;
1678 if (ctrl == NULL) {
1679 handler_set_err(hdl, -EINVAL);
1680 return NULL;
1681 }
1682 if (ctrl->handler == hdl)
1683 return ctrl;
1684 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
1685}
1686EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
1687
1688/* Add the controls from another handler to our own. */
1689int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 1690 struct v4l2_ctrl_handler *add,
1691 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 1692{
072e6602 1693 struct v4l2_ctrl_ref *ref;
0996517c
HV		 1694 int ret = 0;
1695
1696 /* Do nothing if either handler is NULL or if they are the same */
1697 if (!hdl || !add || hdl == add)
1698 return 0;
1699 if (hdl->error)
1700 return hdl->error;
77e7c4e6 1701 mutex_lock(add->lock);
072e6602
HV		 1702 list_for_each_entry(ref, &add->ctrl_refs, node) {
1703 struct v4l2_ctrl *ctrl = ref->ctrl;
1704
0996517c
HV		 1705 /* Skip handler-private controls. */
1706 if (ctrl->is_private)
1707 continue;
6e239399
HV		 1708 /* And control classes */
1709 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1710 continue;
34a6b7d0
HV		 1711 /* Filter any unwanted controls */
1712 if (filter && !filter(ctrl))
1713 continue;
0996517c
HV		 1714 ret = handler_new_ref(hdl, ctrl);
1715 if (ret)
1716 break;
1717 }
77e7c4e6 1718 mutex_unlock(add->lock);
0996517c
HV		 1719 return ret;
1720}
1721EXPORT_SYMBOL(v4l2_ctrl_add_handler);
1722
34a6b7d0
HV		 1723bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
1724{
1725 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
1726 return true;
1727 switch (ctrl->id) {
1728 case V4L2_CID_AUDIO_MUTE:
1729 case V4L2_CID_AUDIO_VOLUME:
1730 case V4L2_CID_AUDIO_BALANCE:
1731 case V4L2_CID_AUDIO_BASS:
1732 case V4L2_CID_AUDIO_TREBLE:
1733 case V4L2_CID_AUDIO_LOUDNESS:
1734 return true;
1735 default:
1736 break;
1737 }
1738 return false;
1739}
1740EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
1741
0996517c
HV		 1742/* Cluster controls */
1743void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
1744{
5626b8c7 1745 bool has_volatiles = false;
0996517c
HV		 1746 int i;
1747
1748 /* The first control is the master control and it must not be NULL */
72d877ca 1749 BUG_ON(ncontrols == 0 || controls[0] == NULL);
0996517c
HV		 1750
1751 for (i = 0; i < ncontrols; i++) {
1752 if (controls[i]) {
1753 controls[i]->cluster = controls;
1754 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 1755 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
1756 has_volatiles = true;
0996517c
HV		 1757 }
1758 }
5626b8c7 1759 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 1760}
1761EXPORT_SYMBOL(v4l2_ctrl_cluster);
1762
72d877ca
HV		 1763void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
1764 u8 manual_val, bool set_volatile)
1765{
1766 struct v4l2_ctrl *master = controls[0];
5626b8c7 1767 u32 flag = 0;
72d877ca
HV		 1768 int i;
1769
1770 v4l2_ctrl_cluster(ncontrols, controls);
1771 WARN_ON(ncontrols <= 1);
82a7c049 1772 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 1773 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 1774 master->is_auto = true;
5626b8c7 1775 master->has_volatiles = set_volatile;
72d877ca
HV		 1776 master->manual_mode_value = manual_val;
1777 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 1778
1779 if (!is_cur_manual(master))
1780 flag = V4L2_CTRL_FLAG_INACTIVE |
1781 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 1782
1783 for (i = 1; i < ncontrols; i++)
88365105 1784 if (controls[i])
72d877ca 1785 controls[i]->flags |= flag;
72d877ca
HV		 1786}
1787EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
1788
0996517c
HV		 1789/* Activate/deactivate a control. */
1790void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
1791{
6e239399
HV		 1792 /* invert since the actual flag is called 'inactive' */
1793 bool inactive = !active;
1794 bool old;
1795
0996517c
HV		 1796 if (ctrl == NULL)
1797 return;
1798
6e239399 1799 if (inactive)
0996517c 1800 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 1801 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 1802 else
1803 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 1804 old = test_and_clear_bit(4, &ctrl->flags);
1805 if (old != inactive)
1806 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 1807}
1808EXPORT_SYMBOL(v4l2_ctrl_activate);
1809
1810/* Grab/ungrab a control.
1811 Typically used when streaming starts and you want to grab controls,
1812 preventing the user from changing them.
1813
1814 Just call this and the framework will block any attempts to change
1815 these controls. */
1816void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
1817{
6e239399
HV		 1818 bool old;
1819
0996517c
HV		 1820 if (ctrl == NULL)
1821 return;
1822
6e239399 1823 v4l2_ctrl_lock(ctrl);
0996517c
HV		 1824 if (grabbed)
1825 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 1826 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 1827 else
1828 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 1829 old = test_and_clear_bit(1, &ctrl->flags);
1830 if (old != grabbed)
1831 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
1832 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 1833}
1834EXPORT_SYMBOL(v4l2_ctrl_grab);
1835
1836/* Log the control name and value */
1837static void log_ctrl(const struct v4l2_ctrl *ctrl,
1838 const char *prefix, const char *colon)
1839{
0996517c
HV		 1840 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
1841 return;
1842 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1843 return;
1844
1845 printk(KERN_INFO "%s%s%s: ", prefix, colon, ctrl->name);
1846
1847 switch (ctrl->type) {
1848 case V4L2_CTRL_TYPE_INTEGER:
1849 printk(KERN_CONT "%d", ctrl->cur.val);
1850 break;
1851 case V4L2_CTRL_TYPE_BOOLEAN:
1852 printk(KERN_CONT "%s", ctrl->cur.val ? "true" : "false");
1853 break;
1854 case V4L2_CTRL_TYPE_MENU:
1855 printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]);
1856 break;
ce580fe5
SA		 1857 case V4L2_CTRL_TYPE_INTEGER_MENU:
1858 printk(KERN_CONT "%lld", ctrl->qmenu_int[ctrl->cur.val]);
1859 break;
fa4d7096
HV		 1860 case V4L2_CTRL_TYPE_BITMASK:
1861 printk(KERN_CONT "0x%08x", ctrl->cur.val);
1862 break;
0996517c
HV		 1863 case V4L2_CTRL_TYPE_INTEGER64:
1864 printk(KERN_CONT "%lld", ctrl->cur.val64);
1865 break;
1866 case V4L2_CTRL_TYPE_STRING:
1867 printk(KERN_CONT "%s", ctrl->cur.string);
1868 break;
1869 default:
1870 printk(KERN_CONT "unknown type %d", ctrl->type);
1871 break;
1872 }
88365105
HV		 1873 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
1874 V4L2_CTRL_FLAG_GRABBED |
1875 V4L2_CTRL_FLAG_VOLATILE)) {
1876 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
1877 printk(KERN_CONT " inactive");
1878 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
1879 printk(KERN_CONT " grabbed");
1880 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
1881 printk(KERN_CONT " volatile");
1882 }
1883 printk(KERN_CONT "\n");
0996517c
HV		 1884}
1885
1886/* Log all controls owned by the handler */
1887void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
1888 const char *prefix)
1889{
1890 struct v4l2_ctrl *ctrl;
1891 const char *colon = "";
1892 int len;
1893
1894 if (hdl == NULL)
1895 return;
1896 if (prefix == NULL)
1897 prefix = "";
1898 len = strlen(prefix);
1899 if (len && prefix[len - 1] != ' ')
1900 colon = ": ";
77e7c4e6 1901 mutex_lock(hdl->lock);
0996517c
HV		 1902 list_for_each_entry(ctrl, &hdl->ctrls, node)
1903 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
1904 log_ctrl(ctrl, prefix, colon);
77e7c4e6 1905 mutex_unlock(hdl->lock);
0996517c
HV		 1906}
1907EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
1908
1909/* Call s_ctrl for all controls owned by the handler */
1910int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
1911{
1912 struct v4l2_ctrl *ctrl;
1913 int ret = 0;
1914
1915 if (hdl == NULL)
1916 return 0;
77e7c4e6 1917 mutex_lock(hdl->lock);
0996517c
HV		 1918 list_for_each_entry(ctrl, &hdl->ctrls, node)
1919 ctrl->done = false;
1920
1921 list_for_each_entry(ctrl, &hdl->ctrls, node) {
1922 struct v4l2_ctrl *master = ctrl->cluster[0];
1923 int i;
1924
1925 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 1926 /* Skip button controls and read-only controls. */
1927 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
1928 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 1929 continue;
1930
2a863793
HV		 1931 for (i = 0; i < master->ncontrols; i++) {
1932 if (master->cluster[i]) {
1933 cur_to_new(master->cluster[i]);
1934 master->cluster[i]->is_new = 1;
71c6c4c9 1935 master->cluster[i]->done = true;
2a863793
HV		 1936 }
1937 }
54c911eb 1938 ret = call_op(master, s_ctrl);
0996517c
HV		 1939 if (ret)
1940 break;
0996517c 1941 }
77e7c4e6 1942 mutex_unlock(hdl->lock);
0996517c
HV		 1943 return ret;
1944}
1945EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
1946
1947/* Implement VIDIOC_QUERYCTRL */
1948int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
1949{
1950 u32 id = qc->id & V4L2_CTRL_ID_MASK;
1951 struct v4l2_ctrl_ref *ref;
1952 struct v4l2_ctrl *ctrl;
1953
1954 if (hdl == NULL)
1955 return -EINVAL;
1956
77e7c4e6 1957 mutex_lock(hdl->lock);
0996517c
HV		 1958
1959 /* Try to find it */
1960 ref = find_ref(hdl, id);
1961
1962 if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) {
1963 /* Find the next control with ID > qc->id */
1964
1965 /* Did we reach the end of the control list? */
1966 if (id >= node2id(hdl->ctrl_refs.prev)) {
1967 ref = NULL; /* Yes, so there is no next control */
1968 } else if (ref) {
1969 /* We found a control with the given ID, so just get
1970 the next one in the list. */
1971 ref = list_entry(ref->node.next, typeof(*ref), node);
1972 } else {
1973 /* No control with the given ID exists, so start
1974 searching for the next largest ID. We know there
1975 is one, otherwise the first 'if' above would have
1976 been true. */
1977 list_for_each_entry(ref, &hdl->ctrl_refs, node)
1978 if (id < ref->ctrl->id)
1979 break;
1980 }
1981 }
77e7c4e6 1982 mutex_unlock(hdl->lock);
0996517c
HV		 1983 if (!ref)
1984 return -EINVAL;
1985
1986 ctrl = ref->ctrl;
1987 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 1988 if (id >= V4L2_CID_PRIVATE_BASE)
1989 qc->id = id;
1990 else
1991 qc->id = ctrl->id;
0996517c
HV		 1992 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
1993 qc->minimum = ctrl->minimum;
1994 qc->maximum = ctrl->maximum;
1995 qc->default_value = ctrl->default_value;
ce580fe5
SA		 1996 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1997 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 1998 qc->step = 1;
1999 else
2000 qc->step = ctrl->step;
2001 qc->flags = ctrl->flags;
2002 qc->type = ctrl->type;
2003 return 0;
2004}
2005EXPORT_SYMBOL(v4l2_queryctrl);
2006
2007int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2008{
87a0c94c
HV		 2009 if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL)
2010 return -EINVAL;
0996517c
HV		 2011 return v4l2_queryctrl(sd->ctrl_handler, qc);
2012}
2013EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2014
2015/* Implement VIDIOC_QUERYMENU */
2016int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2017{
2018 struct v4l2_ctrl *ctrl;
2019 u32 i = qm->index;
2020
2021 ctrl = v4l2_ctrl_find(hdl, qm->id);
2022 if (!ctrl)
2023 return -EINVAL;
2024
2025 qm->reserved = 0;
2026 /* Sanity checks */
ce580fe5
SA		 2027 switch (ctrl->type) {
2028 case V4L2_CTRL_TYPE_MENU:
2029 if (ctrl->qmenu == NULL)
2030 return -EINVAL;
2031 break;
2032 case V4L2_CTRL_TYPE_INTEGER_MENU:
2033 if (ctrl->qmenu_int == NULL)
2034 return -EINVAL;
2035 break;
2036 default:
2037 return -EINVAL;
2038 }
2039
2040 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2041 return -EINVAL;
ce580fe5 2042
0996517c
HV		 2043 /* Use mask to see if this menu item should be skipped */
2044 if (ctrl->menu_skip_mask & (1 << i))
2045 return -EINVAL;
2046 /* Empty menu items should also be skipped */
ce580fe5
SA		 2047 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2048 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2049 return -EINVAL;
2050 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2051 } else {
2052 qm->value = ctrl->qmenu_int[i];
2053 }
0996517c
HV		 2054 return 0;
2055}
2056EXPORT_SYMBOL(v4l2_querymenu);
2057
2058int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2059{
2060 return v4l2_querymenu(sd->ctrl_handler, qm);
2061}
2062EXPORT_SYMBOL(v4l2_subdev_querymenu);
2063
2064
2065
2066/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2067
2068 It is not a fully atomic operation, just best-effort only. After all, if
2069 multiple controls have to be set through multiple i2c writes (for example)
2070 then some initial writes may succeed while others fail. Thus leaving the
2071 system in an inconsistent state. The question is how much effort you are
2072 willing to spend on trying to make something atomic that really isn't.
2073
2074 From the point of view of an application the main requirement is that
2075 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2076 error should be returned without actually affecting any controls.
2077
2078 If all the values are correct, then it is acceptable to just give up
2079 in case of low-level errors.
2080
2081 It is important though that the application can tell when only a partial
2082 configuration was done. The way we do that is through the error_idx field
2083 of struct v4l2_ext_controls: if that is equal to the count field then no
2084 controls were affected. Otherwise all controls before that index were
2085 successful in performing their 'get' or 'set' operation, the control at
2086 the given index failed, and you don't know what happened with the controls
2087 after the failed one. Since if they were part of a control cluster they
2088 could have been successfully processed (if a cluster member was encountered
2089 at index < error_idx), they could have failed (if a cluster member was at
2090 error_idx), or they may not have been processed yet (if the first cluster
2091 member appeared after error_idx).
2092
2093 It is all fairly theoretical, though. In practice all you can do is to
2094 bail out. If error_idx == count, then it is an application bug. If
2095 error_idx < count then it is only an application bug if the error code was
2096 EBUSY. That usually means that something started streaming just when you
2097 tried to set the controls. In all other cases it is a driver/hardware
2098 problem and all you can do is to retry or bail out.
2099
2100 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2101 never modifies controls the error_idx is just set to whatever control
2102 has an invalid value.
2103 */
2104
2105/* Prepare for the extended g/s/try functions.
2106 Find the controls in the control array and do some basic checks. */
2107static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2108 struct v4l2_ext_controls *cs,
eb5b16ef 2109 struct v4l2_ctrl_helper *helpers)
0996517c 2110{
eb5b16ef
HV		 2111 struct v4l2_ctrl_helper *h;
2112 bool have_clusters = false;
0996517c
HV		 2113 u32 i;
2114
eb5b16ef 2115 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2116 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2117 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2118 struct v4l2_ctrl *ctrl;
2119 u32 id = c->id & V4L2_CTRL_ID_MASK;
2120
37cd3b73 2121 cs->error_idx = i;
0996517c
HV		 2122
2123 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2124 return -EINVAL;
2125
2126 /* Old-style private controls are not allowed for
2127 extended controls */
2128 if (id >= V4L2_CID_PRIVATE_BASE)
2129 return -EINVAL;
eb5b16ef
HV		 2130 ref = find_ref_lock(hdl, id);
2131 if (ref == NULL)
0996517c 2132 return -EINVAL;
eb5b16ef 2133 ctrl = ref->ctrl;
0996517c
HV		 2134 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2135 return -EINVAL;
2136
eb5b16ef
HV		 2137 if (ctrl->cluster[0]->ncontrols > 1)
2138 have_clusters = true;
2139 if (ctrl->cluster[0] != ctrl)
2140 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
2141 /* Store the ref to the master control of the cluster */
2142 h->mref = ref;
2143 h->ctrl = ctrl;
2144 /* Initially set next to 0, meaning that there is no other
2145 control in this helper array belonging to the same
2146 cluster */
2147 h->next = 0;
0996517c 2148 }
0996517c 2149
eb5b16ef
HV		 2150 /* We are done if there were no controls that belong to a multi-
2151 control cluster. */
2152 if (!have_clusters)
2153 return 0;
0996517c 2154
eb5b16ef
HV		 2155 /* The code below figures out in O(n) time which controls in the list
2156 belong to the same cluster. */
0996517c 2157
eb5b16ef 2158 /* This has to be done with the handler lock taken. */
77e7c4e6 2159 mutex_lock(hdl->lock);
0996517c 2160
eb5b16ef
HV		 2161 /* First zero the helper field in the master control references */
2162 for (i = 0; i < cs->count; i++)
c082266f 2163 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2164 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2165 struct v4l2_ctrl_ref *mref = h->mref;
2166
2167 /* If the mref->helper is set, then it points to an earlier
2168 helper that belongs to the same cluster. */
2169 if (mref->helper) {
2170 /* Set the next field of mref->helper to the current
2171 index: this means that that earlier helper now
2172 points to the next helper in the same cluster. */
2173 mref->helper->next = i;
2174 /* mref should be set only for the first helper in the
2175 cluster, clear the others. */
2176 h->mref = NULL;
2177 }
2178 /* Point the mref helper to the current helper struct. */
2179 mref->helper = h;
0996517c 2180 }
77e7c4e6 2181 mutex_unlock(hdl->lock);
eb5b16ef 2182 return 0;
0996517c
HV		 2183}
2184
2185/* Handles the corner case where cs->count == 0. It checks whether the
2186 specified control class exists. If that class ID is 0, then it checks
2187 whether there are any controls at all. */
2188static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2189{
2190 if (ctrl_class == 0)
2191 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2192 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2193}
2194
2195
2196
2197/* Get extended controls. Allocates the helpers array if needed. */
2198int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2199{
eb5b16ef
HV		 2200 struct v4l2_ctrl_helper helper[4];
2201 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2202 int ret;
ddac5c10 2203 int i, j;
0996517c
HV		 2204
2205 cs->error_idx = cs->count;
2206 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2207
2208 if (hdl == NULL)
2209 return -EINVAL;
2210
2211 if (cs->count == 0)
2212 return class_check(hdl, cs->ctrl_class);
2213
2214 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2215 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2216 GFP_KERNEL);
0996517c
HV		 2217 if (helpers == NULL)
2218 return -ENOMEM;
2219 }
2220
37cd3b73
HV		 2221 ret = prepare_ext_ctrls(hdl, cs, helpers);
2222 cs->error_idx = cs->count;
0996517c
HV		 2223
2224 for (i = 0; !ret && i < cs->count; i++)
2225 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2226 ret = -EACCES;
2227
2228 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2229 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2230 struct v4l2_ctrl *ctrl) = cur_to_user;
2231 struct v4l2_ctrl *master;
0996517c 2232
eb5b16ef 2233 if (helpers[i].mref == NULL)
0996517c
HV		 2234 continue;
2235
eb5b16ef 2236 master = helpers[i].mref->ctrl;
0996517c
HV		 2237 cs->error_idx = i;
2238
2239 v4l2_ctrl_lock(master);
ddac5c10
HV		 2240
2241 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2242 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2243 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2244 for (j = 0; j < master->ncontrols; j++)
2245 cur_to_new(master->cluster[j]);
54c911eb 2246 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2247 ctrl_to_user = new_to_user;
ddac5c10
HV		 2248 }
2249 /* If OK, then copy the current (for non-volatile controls)
2250 or the new (for volatile controls) control values to the
2251 caller */
eb5b16ef
HV		 2252 if (!ret) {
2253 u32 idx = i;
2254
2255 do {
2256 ret = ctrl_to_user(cs->controls + idx,
2257 helpers[idx].ctrl);
2258 idx = helpers[idx].next;
2259 } while (!ret && idx);
2260 }
0996517c 2261 v4l2_ctrl_unlock(master);
0996517c
HV		 2262 }
2263
2264 if (cs->count > ARRAY_SIZE(helper))
2265 kfree(helpers);
2266 return ret;
2267}
2268EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2269
2270int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2271{
2272 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2273}
2274EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2275
2276/* Helper function to get a single control */
03d5285b 2277static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2278{
2279 struct v4l2_ctrl *master = ctrl->cluster[0];
2280 int ret = 0;
ddac5c10 2281 int i;
0996517c 2282
03d5285b
LP		 2283 /* String controls are not supported. The new_to_user() and
2284 * cur_to_user() calls below would need to be modified not to access
2285 * userspace memory when called from get_ctrl().
2286 */
2287 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
2288 return -EINVAL;
2289
0996517c
HV		 2290 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2291 return -EACCES;
2292
2293 v4l2_ctrl_lock(master);
2294 /* g_volatile_ctrl will update the current control values */
5626b8c7 2295 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2296 for (i = 0; i < master->ncontrols; i++)
2297 cur_to_new(master->cluster[i]);
54c911eb 2298 ret = call_op(master, g_volatile_ctrl);
03d5285b 2299 new_to_user(c, ctrl);
ddac5c10 2300 } else {
03d5285b 2301 cur_to_user(c, ctrl);
ddac5c10 2302 }
0996517c
HV		 2303 v4l2_ctrl_unlock(master);
2304 return ret;
2305}
2306
2307int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2308{
2309 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2310 struct v4l2_ext_control c;
2311 int ret;
0996517c
HV		 2312
2313 if (ctrl == NULL || !type_is_int(ctrl))
2314 return -EINVAL;
03d5285b
LP		 2315 ret = get_ctrl(ctrl, &c);
2316 control->value = c.value;
2317 return ret;
0996517c
HV		 2318}
2319EXPORT_SYMBOL(v4l2_g_ctrl);
2320
2321int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2322{
2323 return v4l2_g_ctrl(sd->ctrl_handler, control);
2324}
2325EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2326
2327s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2328{
03d5285b 2329 struct v4l2_ext_control c;
0996517c
HV		 2330
2331 /* It's a driver bug if this happens. */
2332 WARN_ON(!type_is_int(ctrl));
03d5285b
LP		 2333 c.value = 0;
2334 get_ctrl(ctrl, &c);
2335 return c.value;
0996517c
HV		 2336}
2337EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2338
03d5285b
LP		 2339s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2340{
2341 struct v4l2_ext_control c;
2342
2343 /* It's a driver bug if this happens. */
2344 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
2345 c.value = 0;
2346 get_ctrl(ctrl, &c);
2347 return c.value;
2348}
2349EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2350
0996517c
HV		 2351
2352/* Core function that calls try/s_ctrl and ensures that the new value is
2353 copied to the current value on a set.
2354 Must be called with ctrl->handler->lock held. */
e6402585
HV		 2355static int try_or_set_cluster(struct v4l2_fh *fh,
2356 struct v4l2_ctrl *master, bool set)
0996517c 2357{
72d877ca 2358 bool update_flag;
eb5b16ef 2359 int ret;
0996517c
HV		 2360 int i;
2361
2362 /* Go through the cluster and either validate the new value or
2363 (if no new value was set), copy the current value to the new
2364 value, ensuring a consistent view for the control ops when
2365 called. */
eb5b16ef 2366 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2367 struct v4l2_ctrl *ctrl = master->cluster[i];
2368
2369 if (ctrl == NULL)
2370 continue;
2371
eb5b16ef
HV		 2372 if (!ctrl->is_new) {
2373 cur_to_new(ctrl);
0996517c
HV		 2374 continue;
2375 }
eb5b16ef
HV		 2376 /* Check again: it may have changed since the
2377 previous check in try_or_set_ext_ctrls(). */
2378 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2379 return -EBUSY;
0996517c
HV		 2380 }
2381
eb5b16ef 2382 ret = call_op(master, try_ctrl);
0996517c
HV		 2383
2384 /* Don't set if there is no change */
72d877ca
HV		 2385 if (ret || !set || !cluster_changed(master))
2386 return ret;
2387 ret = call_op(master, s_ctrl);
72d877ca
HV		 2388 if (ret)
2389 return ret;
2390
eb5b16ef 2391 /* If OK, then make the new values permanent. */
72d877ca
HV		 2392 update_flag = is_cur_manual(master) != is_new_manual(master);
2393 for (i = 0; i < master->ncontrols; i++)
ab892bac 2394 new_to_cur(fh, master->cluster[i], update_flag && i > 0);
72d877ca 2395 return 0;
0996517c
HV		 2396}
2397
e6402585
HV		 2398/* Validate controls. */
2399static int validate_ctrls(struct v4l2_ext_controls *cs,
2400 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 2401{
e6402585 2402 unsigned i;
0996517c
HV		 2403 int ret = 0;
2404
eb5b16ef 2405 cs->error_idx = cs->count;
0996517c
HV		 2406 for (i = 0; i < cs->count; i++) {
2407 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
2408
e6402585 2409 cs->error_idx = i;
0996517c
HV		 2410
2411 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2412 return -EACCES;
2413 /* This test is also done in try_set_control_cluster() which
2414 is called in atomic context, so that has the final say,
2415 but it makes sense to do an up-front check as well. Once
2416 an error occurs in try_set_control_cluster() some other
2417 controls may have been set already and we want to do a
2418 best-effort to avoid that. */
2419 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2420 return -EBUSY;
eb5b16ef
HV		 2421 ret = validate_new(ctrl, &cs->controls[i]);
2422 if (ret)
2423 return ret;
0996517c 2424 }
e6402585
HV		 2425 return 0;
2426}
2427
5626b8c7
HV		 2428/* Obtain the current volatile values of an autocluster and mark them
2429 as new. */
2430static void update_from_auto_cluster(struct v4l2_ctrl *master)
2431{
2432 int i;
2433
2434 for (i = 0; i < master->ncontrols; i++)
2435 cur_to_new(master->cluster[i]);
2436 if (!call_op(master, g_volatile_ctrl))
2437 for (i = 1; i < master->ncontrols; i++)
2438 if (master->cluster[i])
2439 master->cluster[i]->is_new = 1;
2440}
2441
e6402585
HV		 2442/* Try or try-and-set controls */
2443static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2444 struct v4l2_ext_controls *cs,
2445 bool set)
2446{
2447 struct v4l2_ctrl_helper helper[4];
2448 struct v4l2_ctrl_helper *helpers = helper;
2449 unsigned i, j;
2450 int ret;
2451
2452 cs->error_idx = cs->count;
2453 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2454
2455 if (hdl == NULL)
2456 return -EINVAL;
2457
2458 if (cs->count == 0)
2459 return class_check(hdl, cs->ctrl_class);
0996517c 2460
e6402585 2461 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 2462 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2463 GFP_KERNEL);
e6402585
HV		 2464 if (!helpers)
2465 return -ENOMEM;
2466 }
2467 ret = prepare_ext_ctrls(hdl, cs, helpers);
2468 if (!ret)
2469 ret = validate_ctrls(cs, helpers, set);
2470 if (ret && set)
2471 cs->error_idx = cs->count;
0996517c 2472 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2473 struct v4l2_ctrl *master;
2474 u32 idx = i;
0996517c 2475
eb5b16ef 2476 if (helpers[i].mref == NULL)
0996517c
HV		 2477 continue;
2478
37cd3b73 2479 cs->error_idx = i;
eb5b16ef
HV		 2480 master = helpers[i].mref->ctrl;
2481 v4l2_ctrl_lock(master);
0996517c 2482
2a863793 2483 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2484 for (j = 0; j < master->ncontrols; j++)
2485 if (master->cluster[j])
2a863793 2486 master->cluster[j]->is_new = 0;
0996517c 2487
5626b8c7
HV		 2488 /* For volatile autoclusters that are currently in auto mode
2489 we need to discover if it will be set to manual mode.
2490 If so, then we have to copy the current volatile values
2491 first since those will become the new manual values (which
2492 may be overwritten by explicit new values from this set
2493 of controls). */
2494 if (master->is_auto && master->has_volatiles &&
2495 !is_cur_manual(master)) {
2496 /* Pick an initial non-manual value */
2497 s32 new_auto_val = master->manual_mode_value + 1;
2498 u32 tmp_idx = idx;
2499
2500 do {
2501 /* Check if the auto control is part of the
2502 list, and remember the new value. */
2503 if (helpers[tmp_idx].ctrl == master)
2504 new_auto_val = cs->controls[tmp_idx].value;
2505 tmp_idx = helpers[tmp_idx].next;
2506 } while (tmp_idx);
2507 /* If the new value == the manual value, then copy
2508 the current volatile values. */
2509 if (new_auto_val == master->manual_mode_value)
2510 update_from_auto_cluster(master);
2511 }
2512
0996517c 2513 /* Copy the new caller-supplied control values.
2a863793 2514 user_to_new() sets 'is_new' to 1. */
eb5b16ef
HV		 2515 do {
2516 ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
2517 idx = helpers[idx].next;
2518 } while (!ret && idx);
0996517c
HV		 2519
2520 if (!ret)
e6402585 2521 ret = try_or_set_cluster(fh, master, set);
0996517c
HV		 2522
2523 /* Copy the new values back to userspace. */
eb5b16ef
HV		 2524 if (!ret) {
2525 idx = i;
2526 do {
adf41b9b 2527 ret = new_to_user(cs->controls + idx,
e6402585 2528 helpers[idx].ctrl);
eb5b16ef
HV		 2529 idx = helpers[idx].next;
2530 } while (!ret && idx);
2531 }
2532 v4l2_ctrl_unlock(master);
0996517c 2533 }
0996517c 2534
0996517c
HV		 2535 if (cs->count > ARRAY_SIZE(helper))
2536 kfree(helpers);
2537 return ret;
2538}
2539
2540int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2541{
ab892bac 2542 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 2543}
2544EXPORT_SYMBOL(v4l2_try_ext_ctrls);
2545
ab892bac
HV		 2546int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2547 struct v4l2_ext_controls *cs)
0996517c 2548{
ab892bac 2549 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 2550}
2551EXPORT_SYMBOL(v4l2_s_ext_ctrls);
2552
2553int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2554{
ab892bac 2555 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 2556}
2557EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
2558
2559int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2560{
ab892bac 2561 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 2562}
2563EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
2564
2565/* Helper function for VIDIOC_S_CTRL compatibility */
03d5285b
LP		 2566static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
2567 struct v4l2_ext_control *c)
0996517c
HV		 2568{
2569 struct v4l2_ctrl *master = ctrl->cluster[0];
2570 int ret;
2571 int i;
2572
03d5285b
LP		 2573 /* String controls are not supported. The user_to_new() and
2574 * cur_to_user() calls below would need to be modified not to access
2575 * userspace memory when called from set_ctrl().
2576 */
2577 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
2578 return -EINVAL;
2579
2580 ret = validate_new(ctrl, c);
eb5b16ef
HV		 2581 if (ret)
2582 return ret;
2583
0996517c
HV		 2584 v4l2_ctrl_lock(ctrl);
2585
2a863793 2586 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2587 for (i = 0; i < master->ncontrols; i++)
2588 if (master->cluster[i])
2a863793 2589 master->cluster[i]->is_new = 0;
0996517c 2590
5626b8c7
HV		 2591 /* For autoclusters with volatiles that are switched from auto to
2592 manual mode we have to update the current volatile values since
2593 those will become the initial manual values after such a switch. */
2594 if (master->is_auto && master->has_volatiles && ctrl == master &&
03d5285b 2595 !is_cur_manual(master) && c->value == master->manual_mode_value)
5626b8c7 2596 update_from_auto_cluster(master);
03d5285b
LP		 2597
2598 user_to_new(c, ctrl);
e6402585 2599 ret = try_or_set_cluster(fh, master, true);
03d5285b
LP		 2600 cur_to_user(c, ctrl);
2601
0996517c
HV		 2602 v4l2_ctrl_unlock(ctrl);
2603 return ret;
2604}
2605
ab892bac
HV		 2606int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2607 struct v4l2_control *control)
0996517c
HV		 2608{
2609 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2610 struct v4l2_ext_control c;
2611 int ret;
0996517c
HV		 2612
2613 if (ctrl == NULL || !type_is_int(ctrl))
2614 return -EINVAL;
2615
7ebbc39f
HV		 2616 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2617 return -EACCES;
2618
03d5285b
LP		 2619 c.value = control->value;
2620 ret = set_ctrl(fh, ctrl, &c);
2621 control->value = c.value;
2622 return ret;
0996517c
HV		 2623}
2624EXPORT_SYMBOL(v4l2_s_ctrl);
2625
2626int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2627{
ab892bac 2628 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 2629}
2630EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
2631
2632int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
2633{
03d5285b
LP		 2634 struct v4l2_ext_control c;
2635
0996517c
HV		 2636 /* It's a driver bug if this happens. */
2637 WARN_ON(!type_is_int(ctrl));
03d5285b
LP		 2638 c.value = val;
2639 return set_ctrl(NULL, ctrl, &c);
0996517c
HV		 2640}
2641EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
6e239399 2642
03d5285b
LP		 2643int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
2644{
2645 struct v4l2_ext_control c;
2646
2647 /* It's a driver bug if this happens. */
2648 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
2649 c.value64 = val;
2650 return set_ctrl(NULL, ctrl, &c);
2651}
2652EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64);
2653
6e6d76cd 2654static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 2655{
3e366149
HG		 2656 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2657
2658 if (ctrl == NULL)
2659 return -EINVAL;
2660
6e239399 2661 v4l2_ctrl_lock(ctrl);
77068d36 2662 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 2663 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 2664 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 2665 struct v4l2_event ev;
c12fcfd6 2666 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 2667
c12fcfd6
HV		 2668 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
2669 changes |= V4L2_EVENT_CTRL_CH_VALUE;
2670 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 2671 /* Mark the queue as active, allowing this initial
2672 event to be accepted. */
2673 sev->elems = elems;
77068d36 2674 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 2675 }
2676 v4l2_ctrl_unlock(ctrl);
3e366149 2677 return 0;
6e239399 2678}
6e239399 2679
3e366149 2680static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 2681{
3e366149
HG		 2682 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2683
6e239399 2684 v4l2_ctrl_lock(ctrl);
77068d36 2685 list_del(&sev->node);
6e239399
HV		 2686 v4l2_ctrl_unlock(ctrl);
2687}
3e366149
HG		 2688
2689void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
2690{
2691 u32 old_changes = old->u.ctrl.changes;
2692
2693 old->u.ctrl = new->u.ctrl;
2694 old->u.ctrl.changes |= old_changes;
2695}
2696EXPORT_SYMBOL(v4l2_ctrl_replace);
2697
2698void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
2699{
2700 new->u.ctrl.changes |= old->u.ctrl.changes;
2701}
2702EXPORT_SYMBOL(v4l2_ctrl_merge);
2703
2704const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
2705 .add = v4l2_ctrl_add_event,
2706 .del = v4l2_ctrl_del_event,
2707 .replace = v4l2_ctrl_replace,
2708 .merge = v4l2_ctrl_merge,
2709};
2710EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 2711
2712int v4l2_ctrl_log_status(struct file *file, void *fh)
2713{
2714 struct video_device *vfd = video_devdata(file);
2715 struct v4l2_fh *vfh = file->private_data;
2716
2717 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
2718 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
2719 vfd->v4l2_dev->name);
2720 return 0;
2721}
2722EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 2723
2724int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 2725 const struct v4l2_event_subscription *sub)
a26243b0
HV		 2726{
2727 if (sub->type == V4L2_EVENT_CTRL)
3e366149 2728 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 2729 return -EINVAL;
2730}
2731EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
2732
2733unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
2734{
2735 struct v4l2_fh *fh = file->private_data;
2736
2737 if (v4l2_event_pending(fh))
2738 return POLLPRI;
2739 poll_wait(file, &fh->wait, wait);
2740 return 0;
2741}
2742EXPORT_SYMBOL(v4l2_ctrl_poll);
kernel source for telekom puls (alcatel/mediatek)