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[media] V4L: Add header file defining standard image sizes
[mirror_ubuntu-artful-kernel.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 };
2e81dde9
AK		 387 static const char * const h264_fp_arrangement_type[] = {
388 "Checkerboard",
389 "Column",
390 "Row",
391 "Side by Side",
392 "Top Bottom",
393 "Temporal",
394 NULL,
395 };
396 static const char * const h264_fmo_map_type[] = {
397 "Interleaved Slices",
398 "Scattered Slices",
399 "Foreground with Leftover",
400 "Box Out",
401 "Raster Scan",
402 "Wipe Scan",
403 "Explicit",
404 NULL,
405 };
064f5096
KD		 406 static const char * const mpeg_mpeg4_level[] = {
407 "0",
408 "0b",
409 "1",
410 "2",
411 "3",
412 "3b",
413 "4",
414 "5",
415 NULL,
416 };
417 static const char * const mpeg4_profile[] = {
418 "Simple",
f769c260 419 "Advanced Simple",
064f5096
KD		 420 "Core",
421 "Simple Scalable",
422 "Advanced Coding Efficency",
423 NULL,
424 };
425
0b159acd
SA		 426 static const char * const flash_led_mode[] = {
427 "Off",
428 "Flash",
429 "Torch",
430 NULL,
431 };
432 static const char * const flash_strobe_source[] = {
433 "Software",
434 "External",
435 NULL,
436 };
0996517c 437
c7361ae1
SN		 438 static const char * const jpeg_chroma_subsampling[] = {
439 "4:4:4",
440 "4:2:2",
441 "4:2:0",
442 "4:1:1",
443 "4:1:0",
444 "Gray",
445 NULL,
446 };
977ebec7
HV		 447 static const char * const dv_tx_mode[] = {
448 "DVI-D",
449 "HDMI",
450 NULL,
451 };
452 static const char * const dv_rgb_range[] = {
453 "Automatic",
454 "RGB limited range (16-235)",
455 "RGB full range (0-255)",
456 NULL,
457 };
458
c7361ae1 459
0996517c
HV		 460 switch (id) {
461 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
462 return mpeg_audio_sampling_freq;
463 case V4L2_CID_MPEG_AUDIO_ENCODING:
464 return mpeg_audio_encoding;
465 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
466 return mpeg_audio_l1_bitrate;
467 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
468 return mpeg_audio_l2_bitrate;
469 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
470 return mpeg_audio_l3_bitrate;
471 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
472 return mpeg_audio_ac3_bitrate;
473 case V4L2_CID_MPEG_AUDIO_MODE:
474 return mpeg_audio_mode;
475 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
476 return mpeg_audio_mode_extension;
477 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
478 return mpeg_audio_emphasis;
479 case V4L2_CID_MPEG_AUDIO_CRC:
480 return mpeg_audio_crc;
24c19a21
HV		 481 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
482 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
483 return mpeg_audio_dec_playback;
0996517c
HV		 484 case V4L2_CID_MPEG_VIDEO_ENCODING:
485 return mpeg_video_encoding;
486 case V4L2_CID_MPEG_VIDEO_ASPECT:
487 return mpeg_video_aspect;
488 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
489 return mpeg_video_bitrate_mode;
490 case V4L2_CID_MPEG_STREAM_TYPE:
491 return mpeg_stream_type;
492 case V4L2_CID_MPEG_STREAM_VBI_FMT:
493 return mpeg_stream_vbi_fmt;
494 case V4L2_CID_POWER_LINE_FREQUENCY:
495 return camera_power_line_frequency;
496 case V4L2_CID_EXPOSURE_AUTO:
497 return camera_exposure_auto;
cf072139
SN		 498 case V4L2_CID_EXPOSURE_METERING:
499 return camera_exposure_metering;
2272ab65
SN		 500 case V4L2_CID_AUTO_FOCUS_RANGE:
501 return camera_auto_focus_range;
0996517c
HV		 502 case V4L2_CID_COLORFX:
503 return colorfx;
e40a0573
SN		 504 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
505 return auto_n_preset_white_balance;
7f84ad8b
SN		 506 case V4L2_CID_ISO_SENSITIVITY_AUTO:
507 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 508 case V4L2_CID_SCENE_MODE:
509 return scene_mode;
0996517c
HV		 510 case V4L2_CID_TUNE_PREEMPHASIS:
511 return tune_preemphasis;
0b159acd
SA		 512 case V4L2_CID_FLASH_LED_MODE:
513 return flash_led_mode;
514 case V4L2_CID_FLASH_STROBE_SOURCE:
515 return flash_strobe_source;
064f5096
KD		 516 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
517 return header_mode;
518 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
519 return multi_slice;
520 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
521 return entropy_mode;
522 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
523 return mpeg_h264_level;
524 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
525 return h264_loop_filter;
526 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
527 return h264_profile;
528 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
529 return vui_sar_idc;
2e81dde9
AK		 530 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
531 return h264_fp_arrangement_type;
532 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
533 return h264_fmo_map_type;
064f5096
KD		 534 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
535 return mpeg_mpeg4_level;
536 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
537 return mpeg4_profile;
c7361ae1
SN		 538 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
539 return jpeg_chroma_subsampling;
977ebec7
HV		 540 case V4L2_CID_DV_TX_MODE:
541 return dv_tx_mode;
542 case V4L2_CID_DV_TX_RGB_RANGE:
543 case V4L2_CID_DV_RX_RGB_RANGE:
544 return dv_rgb_range;
c7361ae1 545
0996517c
HV		 546 default:
547 return NULL;
548 }
549}
550EXPORT_SYMBOL(v4l2_ctrl_get_menu);
551
552/* Return the control name. */
553const char *v4l2_ctrl_get_name(u32 id)
554{
555 switch (id) {
556 /* USER controls */
6c8d6111 557 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 558 case V4L2_CID_USER_CLASS: return "User Controls";
559 case V4L2_CID_BRIGHTNESS: return "Brightness";
560 case V4L2_CID_CONTRAST: return "Contrast";
561 case V4L2_CID_SATURATION: return "Saturation";
562 case V4L2_CID_HUE: return "Hue";
563 case V4L2_CID_AUDIO_VOLUME: return "Volume";
564 case V4L2_CID_AUDIO_BALANCE: return "Balance";
565 case V4L2_CID_AUDIO_BASS: return "Bass";
566 case V4L2_CID_AUDIO_TREBLE: return "Treble";
567 case V4L2_CID_AUDIO_MUTE: return "Mute";
568 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 569 case V4L2_CID_BLACK_LEVEL: return "Black Level";
570 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
571 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
572 case V4L2_CID_RED_BALANCE: return "Red Balance";
573 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
574 case V4L2_CID_GAMMA: return "Gamma";
575 case V4L2_CID_EXPOSURE: return "Exposure";
576 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
577 case V4L2_CID_GAIN: return "Gain";
578 case V4L2_CID_HFLIP: return "Horizontal Flip";
579 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 580 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
581 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
582 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
583 case V4L2_CID_SHARPNESS: return "Sharpness";
584 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
585 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 586 case V4L2_CID_COLOR_KILLER: return "Color Killer";
587 case V4L2_CID_COLORFX: return "Color Effects";
588 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
589 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
590 case V4L2_CID_ROTATE: return "Rotate";
591 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 592 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 593 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
594 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 595 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
596 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 597 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 598 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c
HV		 599
600 /* MPEG controls */
6c8d6111 601 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 602 case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
603 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
604 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
605 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
606 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
607 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 608 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
609 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
610 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 611 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 612 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
613 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
614 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
615 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
616 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 617 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 618 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
619 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
620 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
621 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
622 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 623 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
624 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 625 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
626 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
627 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
628 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
629 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
630 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
631 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
632 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
633 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 634 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 635 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 636 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 637 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
638 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 639 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 640 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
641 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
642 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 643 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 644 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 645 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
646 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 647 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
648 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
649 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 650 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
651 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 652 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
653 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
654 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
655 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 656 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
657 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 658 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
659 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
660 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
661 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
662 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
663 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
664 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
665 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
666 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 667 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
668 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
669 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
670 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
671 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
672 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
673 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
674 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
675 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
676 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
677 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
678 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
679 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
680 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
681 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
682 return "H264 Set QP Value for HC Layers";
064f5096 683 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 684 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
685 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 686 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
687 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
688 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
689 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
690 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 691 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
692 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
693 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 694 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 695 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
696 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 697 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
0996517c
HV		 698
699 /* CAMERA controls */
6c8d6111 700 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 701 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
702 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
703 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
704 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
705 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
706 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
707 case V4L2_CID_PAN_RESET: return "Pan, Reset";
708 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
709 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
710 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
711 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
712 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 713 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 714 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
715 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
716 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
717 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 718 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
719 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 720 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 721 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 722 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 723 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 724 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
725 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 726 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 727 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 728 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 729 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
730 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
731 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
732 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
0996517c
HV		 733
734 /* FM Radio Modulator control */
6c8d6111 735 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 736 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
737 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
738 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
739 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
740 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
741 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
742 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
743 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
744 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 745 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 746 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
747 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
748 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
749 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
750 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
751 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
752 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 753 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 754 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
755 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
756
0b159acd 757 /* Flash controls */
f08aacf8
HV		 758 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
759 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
760 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 761 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 762 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
763 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
764 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
765 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
766 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
767 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 768 case V4L2_CID_FLASH_FAULT: return "Faults";
769 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 770 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 771
c7361ae1
SN		 772 /* JPEG encoder controls */
773 /* Keep the order of the 'case's the same as in videodev2.h! */
774 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
775 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
776 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
777 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
778 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
779
8c9d236e
SA		 780 /* Image source controls */
781 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
782 case V4L2_CID_VBLANK: return "Vertical Blanking";
783 case V4L2_CID_HBLANK: return "Horizontal Blanking";
784 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
785
c643ee13
SA		 786 /* Image processing controls */
787 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
788 case V4L2_CID_LINK_FREQ: return "Link Frequency";
789 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 790 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
c643ee13 791
977ebec7
HV		 792 /* DV controls */
793 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
794 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
795 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
796 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
797 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
798 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
799 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
800 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
801
0996517c
HV		 802 default:
803 return NULL;
804 }
805}
806EXPORT_SYMBOL(v4l2_ctrl_get_name);
807
808void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
809 s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags)
810{
811 *name = v4l2_ctrl_get_name(id);
812 *flags = 0;
813
814 switch (id) {
815 case V4L2_CID_AUDIO_MUTE:
816 case V4L2_CID_AUDIO_LOUDNESS:
817 case V4L2_CID_AUTO_WHITE_BALANCE:
818 case V4L2_CID_AUTOGAIN:
819 case V4L2_CID_HFLIP:
820 case V4L2_CID_VFLIP:
821 case V4L2_CID_HUE_AUTO:
822 case V4L2_CID_CHROMA_AGC:
823 case V4L2_CID_COLOR_KILLER:
a2f8b84f 824 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 825 case V4L2_CID_MPEG_AUDIO_MUTE:
826 case V4L2_CID_MPEG_VIDEO_MUTE:
827 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
828 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
829 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
830 case V4L2_CID_FOCUS_AUTO:
831 case V4L2_CID_PRIVACY:
832 case V4L2_CID_AUDIO_LIMITER_ENABLED:
833 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
834 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 835 case V4L2_CID_ILLUMINATORS_1:
836 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 837 case V4L2_CID_FLASH_STROBE_STATUS:
838 case V4L2_CID_FLASH_CHARGE:
839 case V4L2_CID_FLASH_READY:
064f5096
KD		 840 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
841 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
842 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
843 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
844 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
845 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
846 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
44d44a1a 847 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 848 case V4L2_CID_IMAGE_STABILIZATION:
0996517c
HV		 849 *type = V4L2_CTRL_TYPE_BOOLEAN;
850 *min = 0;
851 *max = *step = 1;
852 break;
853 case V4L2_CID_PAN_RESET:
854 case V4L2_CID_TILT_RESET:
0b159acd
SA		 855 case V4L2_CID_FLASH_STROBE:
856 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 857 case V4L2_CID_AUTO_FOCUS_START:
858 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c
HV		 859 *type = V4L2_CTRL_TYPE_BUTTON;
860 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
861 *min = *max = *step = *def = 0;
862 break;
863 case V4L2_CID_POWER_LINE_FREQUENCY:
864 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
865 case V4L2_CID_MPEG_AUDIO_ENCODING:
866 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
867 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
868 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
869 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
870 case V4L2_CID_MPEG_AUDIO_MODE:
871 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
872 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
873 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 874 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
875 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 876 case V4L2_CID_MPEG_VIDEO_ENCODING:
877 case V4L2_CID_MPEG_VIDEO_ASPECT:
878 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
879 case V4L2_CID_MPEG_STREAM_TYPE:
880 case V4L2_CID_MPEG_STREAM_VBI_FMT:
881 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 882 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 883 case V4L2_CID_COLORFX:
e40a0573 884 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 885 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 886 case V4L2_CID_FLASH_LED_MODE:
887 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 888 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
889 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
890 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
891 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
892 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
893 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
894 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 895 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
896 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 897 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
898 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 899 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 900 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 901 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 902 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 903 case V4L2_CID_DV_TX_MODE:
904 case V4L2_CID_DV_TX_RGB_RANGE:
905 case V4L2_CID_DV_RX_RGB_RANGE:
5ebef0fb 906 case V4L2_CID_TEST_PATTERN:
0996517c
HV		 907 *type = V4L2_CTRL_TYPE_MENU;
908 break;
c643ee13
SA		 909 case V4L2_CID_LINK_FREQ:
910 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
911 break;
0996517c
HV		 912 case V4L2_CID_RDS_TX_PS_NAME:
913 case V4L2_CID_RDS_TX_RADIO_TEXT:
914 *type = V4L2_CTRL_TYPE_STRING;
915 break;
7f84ad8b 916 case V4L2_CID_ISO_SENSITIVITY:
d58083c9
SN		 917 case V4L2_CID_AUTO_EXPOSURE_BIAS:
918 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
919 break;
0996517c
HV		 920 case V4L2_CID_USER_CLASS:
921 case V4L2_CID_CAMERA_CLASS:
922 case V4L2_CID_MPEG_CLASS:
923 case V4L2_CID_FM_TX_CLASS:
0b159acd 924 case V4L2_CID_FLASH_CLASS:
c7361ae1 925 case V4L2_CID_JPEG_CLASS:
8c9d236e 926 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 927 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 928 case V4L2_CID_DV_CLASS:
0996517c
HV		 929 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
930 /* You can neither read not write these */
931 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
932 *min = *max = *step = *def = 0;
933 break;
934 case V4L2_CID_BG_COLOR:
935 *type = V4L2_CTRL_TYPE_INTEGER;
936 *step = 1;
937 *min = 0;
938 /* Max is calculated as RGB888 that is 2^24 */
939 *max = 0xFFFFFF;
940 break;
0b159acd 941 case V4L2_CID_FLASH_FAULT:
c7361ae1 942 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 943 case V4L2_CID_3A_LOCK:
2272ab65 944 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 945 case V4L2_CID_DV_TX_HOTPLUG:
946 case V4L2_CID_DV_TX_RXSENSE:
947 case V4L2_CID_DV_TX_EDID_PRESENT:
948 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 949 *type = V4L2_CTRL_TYPE_BITMASK;
950 break;
064f5096
KD		 951 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
952 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
953 *type = V4L2_CTRL_TYPE_INTEGER;
954 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
955 break;
24c19a21
HV		 956 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
957 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
c643ee13
SA		 958 *flags |= V4L2_CTRL_FLAG_VOLATILE;
959 /* Fall through */
960 case V4L2_CID_PIXEL_RATE:
24c19a21 961 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 962 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
ca576811 963 *min = *max = *step = *def = 0;
24c19a21 964 break;
0996517c
HV		 965 default:
966 *type = V4L2_CTRL_TYPE_INTEGER;
967 break;
968 }
969 switch (id) {
970 case V4L2_CID_MPEG_AUDIO_ENCODING:
971 case V4L2_CID_MPEG_AUDIO_MODE:
972 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
973 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
974 case V4L2_CID_MPEG_STREAM_TYPE:
975 *flags |= V4L2_CTRL_FLAG_UPDATE;
976 break;
977 case V4L2_CID_AUDIO_VOLUME:
978 case V4L2_CID_AUDIO_BALANCE:
979 case V4L2_CID_AUDIO_BASS:
980 case V4L2_CID_AUDIO_TREBLE:
981 case V4L2_CID_BRIGHTNESS:
982 case V4L2_CID_CONTRAST:
983 case V4L2_CID_SATURATION:
984 case V4L2_CID_HUE:
985 case V4L2_CID_RED_BALANCE:
986 case V4L2_CID_BLUE_BALANCE:
987 case V4L2_CID_GAMMA:
988 case V4L2_CID_SHARPNESS:
989 case V4L2_CID_CHROMA_GAIN:
990 case V4L2_CID_RDS_TX_DEVIATION:
991 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
992 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
993 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
994 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
995 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
996 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
997 case V4L2_CID_PILOT_TONE_DEVIATION:
998 case V4L2_CID_PILOT_TONE_FREQUENCY:
999 case V4L2_CID_TUNE_POWER_LEVEL:
1000 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
1001 *flags |= V4L2_CTRL_FLAG_SLIDER;
1002 break;
1003 case V4L2_CID_PAN_RELATIVE:
1004 case V4L2_CID_TILT_RELATIVE:
1005 case V4L2_CID_FOCUS_RELATIVE:
1006 case V4L2_CID_IRIS_RELATIVE:
1007 case V4L2_CID_ZOOM_RELATIVE:
1008 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1009 break;
0b159acd 1010 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1011 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1012 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1013 case V4L2_CID_DV_TX_HOTPLUG:
1014 case V4L2_CID_DV_TX_RXSENSE:
1015 case V4L2_CID_DV_TX_EDID_PRESENT:
1016 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1017 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1018 break;
0996517c
HV		 1019 }
1020}
1021EXPORT_SYMBOL(v4l2_ctrl_fill);
1022
1023/* Helper function to determine whether the control type is compatible with
1024 VIDIOC_G/S_CTRL. */
1025static bool type_is_int(const struct v4l2_ctrl *ctrl)
1026{
1027 switch (ctrl->type) {
1028 case V4L2_CTRL_TYPE_INTEGER64:
1029 case V4L2_CTRL_TYPE_STRING:
1030 /* Nope, these need v4l2_ext_control */
1031 return false;
1032 default:
1033 return true;
1034 }
1035}
1036
6e239399
HV		 1037static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1038{
1039 memset(ev->reserved, 0, sizeof(ev->reserved));
1040 ev->type = V4L2_EVENT_CTRL;
1041 ev->id = ctrl->id;
1042 ev->u.ctrl.changes = changes;
1043 ev->u.ctrl.type = ctrl->type;
1044 ev->u.ctrl.flags = ctrl->flags;
1045 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
1046 ev->u.ctrl.value64 = 0;
1047 else
1048 ev->u.ctrl.value64 = ctrl->cur.val64;
1049 ev->u.ctrl.minimum = ctrl->minimum;
1050 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1051 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1052 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1053 ev->u.ctrl.step = 1;
1054 else
1055 ev->u.ctrl.step = ctrl->step;
1056 ev->u.ctrl.default_value = ctrl->default_value;
1057}
1058
1059static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1060{
1061 struct v4l2_event ev;
77068d36 1062 struct v4l2_subscribed_event *sev;
6e239399 1063
77068d36 1064 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1065 return;
6e239399
HV		 1066 fill_event(&ev, ctrl, changes);
1067
77068d36 1068 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1069 if (sev->fh != fh ||
1070 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1071 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1072}
1073
0996517c
HV		 1074/* Helper function: copy the current control value back to the caller */
1075static int cur_to_user(struct v4l2_ext_control *c,
1076 struct v4l2_ctrl *ctrl)
1077{
1078 u32 len;
1079
1080 switch (ctrl->type) {
1081 case V4L2_CTRL_TYPE_STRING:
1082 len = strlen(ctrl->cur.string);
1083 if (c->size < len + 1) {
1084 c->size = len + 1;
1085 return -ENOSPC;
1086 }
1087 return copy_to_user(c->string, ctrl->cur.string,
1088 len + 1) ? -EFAULT : 0;
1089 case V4L2_CTRL_TYPE_INTEGER64:
1090 c->value64 = ctrl->cur.val64;
1091 break;
1092 default:
1093 c->value = ctrl->cur.val;
1094 break;
1095 }
1096 return 0;
1097}
1098
1099/* Helper function: copy the caller-provider value as the new control value */
1100static int user_to_new(struct v4l2_ext_control *c,
1101 struct v4l2_ctrl *ctrl)
1102{
1103 int ret;
1104 u32 size;
1105
2a863793 1106 ctrl->is_new = 1;
0996517c
HV		 1107 switch (ctrl->type) {
1108 case V4L2_CTRL_TYPE_INTEGER64:
1109 ctrl->val64 = c->value64;
1110 break;
1111 case V4L2_CTRL_TYPE_STRING:
1112 size = c->size;
1113 if (size == 0)
1114 return -ERANGE;
1115 if (size > ctrl->maximum + 1)
1116 size = ctrl->maximum + 1;
1117 ret = copy_from_user(ctrl->string, c->string, size);
1118 if (!ret) {
1119 char last = ctrl->string[size - 1];
1120
1121 ctrl->string[size - 1] = 0;
1122 /* If the string was longer than ctrl->maximum,
1123 then return an error. */
1124 if (strlen(ctrl->string) == ctrl->maximum && last)
1125 return -ERANGE;
1126 }
1127 return ret ? -EFAULT : 0;
1128 default:
1129 ctrl->val = c->value;
1130 break;
1131 }
1132 return 0;
1133}
1134
1135/* Helper function: copy the new control value back to the caller */
1136static int new_to_user(struct v4l2_ext_control *c,
1137 struct v4l2_ctrl *ctrl)
1138{
1139 u32 len;
1140
1141 switch (ctrl->type) {
1142 case V4L2_CTRL_TYPE_STRING:
1143 len = strlen(ctrl->string);
1144 if (c->size < len + 1) {
1145 c->size = ctrl->maximum + 1;
1146 return -ENOSPC;
1147 }
1148 return copy_to_user(c->string, ctrl->string,
1149 len + 1) ? -EFAULT : 0;
1150 case V4L2_CTRL_TYPE_INTEGER64:
1151 c->value64 = ctrl->val64;
1152 break;
1153 default:
1154 c->value = ctrl->val;
1155 break;
1156 }
1157 return 0;
1158}
1159
1160/* Copy the new value to the current value. */
ab892bac
HV		 1161static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
1162 bool update_inactive)
0996517c 1163{
6e239399
HV		 1164 bool changed = false;
1165
0996517c
HV		 1166 if (ctrl == NULL)
1167 return;
1168 switch (ctrl->type) {
6e239399
HV		 1169 case V4L2_CTRL_TYPE_BUTTON:
1170 changed = true;
1171 break;
0996517c
HV		 1172 case V4L2_CTRL_TYPE_STRING:
1173 /* strings are always 0-terminated */
6e239399 1174 changed = strcmp(ctrl->string, ctrl->cur.string);
0996517c
HV		 1175 strcpy(ctrl->cur.string, ctrl->string);
1176 break;
1177 case V4L2_CTRL_TYPE_INTEGER64:
6e239399 1178 changed = ctrl->val64 != ctrl->cur.val64;
0996517c
HV		 1179 ctrl->cur.val64 = ctrl->val64;
1180 break;
1181 default:
6e239399 1182 changed = ctrl->val != ctrl->cur.val;
0996517c
HV		 1183 ctrl->cur.val = ctrl->val;
1184 break;
1185 }
72d877ca 1186 if (update_inactive) {
5626b8c7
HV		 1187 /* Note: update_inactive can only be true for auto clusters. */
1188 ctrl->flags &=
1189 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1190 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1191 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1192 if (ctrl->cluster[0]->has_volatiles)
1193 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1194 }
1249a3a8 1195 fh = NULL;
72d877ca 1196 }
639884a6
HV		 1197 if (changed || update_inactive) {
1198 /* If a control was changed that was not one of the controls
1199 modified by the application, then send the event to all. */
1200 if (!ctrl->is_new)
1201 fh = NULL;
6e239399
HV		 1202 send_event(fh, ctrl,
1203 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) |
1204 (update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
8ac7a949
HV		 1205 if (ctrl->call_notify && changed && ctrl->handler->notify)
1206 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1207 }
0996517c
HV		 1208}
1209
1210/* Copy the current value to the new value */
1211static void cur_to_new(struct v4l2_ctrl *ctrl)
1212{
1213 if (ctrl == NULL)
1214 return;
1215 switch (ctrl->type) {
1216 case V4L2_CTRL_TYPE_STRING:
1217 /* strings are always 0-terminated */
1218 strcpy(ctrl->string, ctrl->cur.string);
1219 break;
1220 case V4L2_CTRL_TYPE_INTEGER64:
1221 ctrl->val64 = ctrl->cur.val64;
1222 break;
1223 default:
1224 ctrl->val = ctrl->cur.val;
1225 break;
1226 }
1227}
1228
1229/* Return non-zero if one or more of the controls in the cluster has a new
1230 value that differs from the current value. */
1231static int cluster_changed(struct v4l2_ctrl *master)
1232{
1233 int diff = 0;
1234 int i;
1235
1236 for (i = 0; !diff && i < master->ncontrols; i++) {
1237 struct v4l2_ctrl *ctrl = master->cluster[i];
1238
1239 if (ctrl == NULL)
1240 continue;
1241 switch (ctrl->type) {
1242 case V4L2_CTRL_TYPE_BUTTON:
1243 /* Button controls are always 'different' */
1244 return 1;
1245 case V4L2_CTRL_TYPE_STRING:
1246 /* strings are always 0-terminated */
1247 diff = strcmp(ctrl->string, ctrl->cur.string);
1248 break;
1249 case V4L2_CTRL_TYPE_INTEGER64:
1250 diff = ctrl->val64 != ctrl->cur.val64;
1251 break;
1252 default:
1253 diff = ctrl->val != ctrl->cur.val;
1254 break;
1255 }
1256 }
1257 return diff;
1258}
1259
03d5285b
LP		 1260/* Validate a new control */
1261static int validate_new(const struct v4l2_ctrl *ctrl,
1262 struct v4l2_ext_control *c)
0996517c 1263{
03d5285b 1264 size_t len;
0996517c 1265 u32 offset;
03d5285b 1266 s32 val;
0996517c
HV		 1267
1268 switch (ctrl->type) {
1269 case V4L2_CTRL_TYPE_INTEGER:
1270 /* Round towards the closest legal value */
03d5285b
LP		 1271 val = c->value + ctrl->step / 2;
1272 val = clamp(val, ctrl->minimum, ctrl->maximum);
0996517c
HV		 1273 offset = val - ctrl->minimum;
1274 offset = ctrl->step * (offset / ctrl->step);
03d5285b 1275 c->value = ctrl->minimum + offset;
0996517c
HV		 1276 return 0;
1277
1278 case V4L2_CTRL_TYPE_BOOLEAN:
03d5285b 1279 c->value = !!c->value;
0996517c
HV		 1280 return 0;
1281
1282 case V4L2_CTRL_TYPE_MENU:
ce580fe5 1283 case V4L2_CTRL_TYPE_INTEGER_MENU:
03d5285b 1284 if (c->value < ctrl->minimum || c->value > ctrl->maximum)
0996517c 1285 return -ERANGE;
03d5285b 1286 if (ctrl->menu_skip_mask & (1 << c->value))
ce580fe5
SA		 1287 return -EINVAL;
1288 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
03d5285b 1289 ctrl->qmenu[c->value][0] == '\0')
0996517c
HV		 1290 return -EINVAL;
1291 return 0;
1292
fa4d7096 1293 case V4L2_CTRL_TYPE_BITMASK:
03d5285b 1294 c->value &= ctrl->maximum;
fa4d7096
HV		 1295 return 0;
1296
0996517c
HV		 1297 case V4L2_CTRL_TYPE_BUTTON:
1298 case V4L2_CTRL_TYPE_CTRL_CLASS:
03d5285b 1299 c->value = 0;
0996517c
HV		 1300 return 0;
1301
1302 case V4L2_CTRL_TYPE_INTEGER64:
1303 return 0;
1304
1305 case V4L2_CTRL_TYPE_STRING:
03d5285b 1306 len = strlen(c->string);
0996517c
HV		 1307 if (len < ctrl->minimum)
1308 return -ERANGE;
1309 if ((len - ctrl->minimum) % ctrl->step)
1310 return -ERANGE;
1311 return 0;
1312
1313 default:
1314 return -EINVAL;
1315 }
1316}
1317
1318static inline u32 node2id(struct list_head *node)
1319{
1320 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1321}
1322
1323/* Set the handler's error code if it wasn't set earlier already */
1324static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1325{
1326 if (hdl->error == 0)
1327 hdl->error = err;
1328 return err;
1329}
1330
1331/* Initialize the handler */
1332int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl,
1333 unsigned nr_of_controls_hint)
1334{
77e7c4e6
SA		 1335 hdl->lock = &hdl->_lock;
1336 mutex_init(hdl->lock);
0996517c
HV		 1337 INIT_LIST_HEAD(&hdl->ctrls);
1338 INIT_LIST_HEAD(&hdl->ctrl_refs);
1339 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1340 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1341 GFP_KERNEL);
0996517c
HV		 1342 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1343 return hdl->error;
1344}
1345EXPORT_SYMBOL(v4l2_ctrl_handler_init);
1346
1347/* Free all controls and control refs */
1348void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1349{
1350 struct v4l2_ctrl_ref *ref, *next_ref;
1351 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1352 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1353
1354 if (hdl == NULL || hdl->buckets == NULL)
1355 return;
1356
77e7c4e6 1357 mutex_lock(hdl->lock);
0996517c
HV		 1358 /* Free all nodes */
1359 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1360 list_del(&ref->node);
1361 kfree(ref);
1362 }
1363 /* Free all controls owned by the handler */
1364 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1365 list_del(&ctrl->node);
77068d36
HV		 1366 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1367 list_del(&sev->node);
0996517c
HV		 1368 kfree(ctrl);
1369 }
1370 kfree(hdl->buckets);
1371 hdl->buckets = NULL;
1372 hdl->cached = NULL;
1373 hdl->error = 0;
77e7c4e6 1374 mutex_unlock(hdl->lock);
0996517c
HV		 1375}
1376EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1377
1378/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1379 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1380 with applications that do not use the NEXT_CTRL flag.
1381
1382 We just find the n-th private user control. It's O(N), but that should not
1383 be an issue in this particular case. */
1384static struct v4l2_ctrl_ref *find_private_ref(
1385 struct v4l2_ctrl_handler *hdl, u32 id)
1386{
1387 struct v4l2_ctrl_ref *ref;
1388
1389 id -= V4L2_CID_PRIVATE_BASE;
1390 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1391 /* Search for private user controls that are compatible with
1392 VIDIOC_G/S_CTRL. */
1393 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1394 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
1395 if (!type_is_int(ref->ctrl))
1396 continue;
1397 if (id == 0)
1398 return ref;
1399 id--;
1400 }
1401 }
1402 return NULL;
1403}
1404
1405/* Find a control with the given ID. */
1406static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1407{
1408 struct v4l2_ctrl_ref *ref;
1409 int bucket;
1410
1411 id &= V4L2_CTRL_ID_MASK;
1412
1413 /* Old-style private controls need special handling */
1414 if (id >= V4L2_CID_PRIVATE_BASE)
1415 return find_private_ref(hdl, id);
1416 bucket = id % hdl->nr_of_buckets;
1417
1418 /* Simple optimization: cache the last control found */
1419 if (hdl->cached && hdl->cached->ctrl->id == id)
1420 return hdl->cached;
1421
1422 /* Not in cache, search the hash */
1423 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1424 while (ref && ref->ctrl->id != id)
1425 ref = ref->next;
1426
1427 if (ref)
1428 hdl->cached = ref; /* cache it! */
1429 return ref;
1430}
1431
1432/* Find a control with the given ID. Take the handler's lock first. */
1433static struct v4l2_ctrl_ref *find_ref_lock(
1434 struct v4l2_ctrl_handler *hdl, u32 id)
1435{
1436 struct v4l2_ctrl_ref *ref = NULL;
1437
1438 if (hdl) {
77e7c4e6 1439 mutex_lock(hdl->lock);
0996517c 1440 ref = find_ref(hdl, id);
77e7c4e6 1441 mutex_unlock(hdl->lock);
0996517c
HV		 1442 }
1443 return ref;
1444}
1445
1446/* Find a control with the given ID. */
1447struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1448{
1449 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1450
1451 return ref ? ref->ctrl : NULL;
1452}
1453EXPORT_SYMBOL(v4l2_ctrl_find);
1454
1455/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1456static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1457 struct v4l2_ctrl *ctrl)
1458{
1459 struct v4l2_ctrl_ref *ref;
1460 struct v4l2_ctrl_ref *new_ref;
1461 u32 id = ctrl->id;
1462 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1463 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1464
1465 /* Automatically add the control class if it is not yet present. */
1466 if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
1467 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1468 return hdl->error;
1469
1470 if (hdl->error)
1471 return hdl->error;
1472
1473 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1474 if (!new_ref)
1475 return handler_set_err(hdl, -ENOMEM);
1476 new_ref->ctrl = ctrl;
1477 if (ctrl->handler == hdl) {
1478 /* By default each control starts in a cluster of its own.
1479 new_ref->ctrl is basically a cluster array with one
1480 element, so that's perfect to use as the cluster pointer.
1481 But only do this for the handler that owns the control. */
1482 ctrl->cluster = &new_ref->ctrl;
1483 ctrl->ncontrols = 1;
1484 }
1485
1486 INIT_LIST_HEAD(&new_ref->node);
1487
77e7c4e6 1488 mutex_lock(hdl->lock);
0996517c
HV		 1489
1490 /* Add immediately at the end of the list if the list is empty, or if
1491 the last element in the list has a lower ID.
1492 This ensures that when elements are added in ascending order the
1493 insertion is an O(1) operation. */
1494 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1495 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1496 goto insert_in_hash;
1497 }
1498
1499 /* Find insert position in sorted list */
1500 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1501 if (ref->ctrl->id < id)
1502 continue;
1503 /* Don't add duplicates */
1504 if (ref->ctrl->id == id) {
1505 kfree(new_ref);
1506 goto unlock;
1507 }
1508 list_add(&new_ref->node, ref->node.prev);
1509 break;
1510 }
1511
1512insert_in_hash:
1513 /* Insert the control node in the hash */
1514 new_ref->next = hdl->buckets[bucket];
1515 hdl->buckets[bucket] = new_ref;
1516
1517unlock:
77e7c4e6 1518 mutex_unlock(hdl->lock);
0996517c
HV		 1519 return 0;
1520}
1521
1522/* Add a new control */
1523static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1524 const struct v4l2_ctrl_ops *ops,
1525 u32 id, const char *name, enum v4l2_ctrl_type type,
1526 s32 min, s32 max, u32 step, s32 def,
ce580fe5
SA		 1527 u32 flags, const char * const *qmenu,
1528 const s64 *qmenu_int, void *priv)
0996517c
HV		 1529{
1530 struct v4l2_ctrl *ctrl;
1531 unsigned sz_extra = 0;
1532
1533 if (hdl->error)
1534 return NULL;
1535
1536 /* Sanity checks */
1537 if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1538 (type == V4L2_CTRL_TYPE_INTEGER && step == 0) ||
fa4d7096 1539 (type == V4L2_CTRL_TYPE_BITMASK && max == 0) ||
0996517c 1540 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
ce580fe5 1541 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL) ||
0996517c
HV		 1542 (type == V4L2_CTRL_TYPE_STRING && max == 0)) {
1543 handler_set_err(hdl, -ERANGE);
1544 return NULL;
1545 }
fa4d7096
HV		 1546 if (type != V4L2_CTRL_TYPE_BITMASK && max < min) {
1547 handler_set_err(hdl, -ERANGE);
1548 return NULL;
1549 }
02ac0480
HV		 1550 if ((type == V4L2_CTRL_TYPE_INTEGER ||
1551 type == V4L2_CTRL_TYPE_MENU ||
ce580fe5 1552 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
02ac0480
HV		 1553 type == V4L2_CTRL_TYPE_BOOLEAN) &&
1554 (def < min || def > max)) {
1555 handler_set_err(hdl, -ERANGE);
1556 return NULL;
1557 }
fa4d7096
HV		 1558 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1559 handler_set_err(hdl, -ERANGE);
1560 return NULL;
1561 }
0996517c
HV		 1562
1563 if (type == V4L2_CTRL_TYPE_BUTTON)
1564 flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1565 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1566 flags |= V4L2_CTRL_FLAG_READ_ONLY;
1567 else if (type == V4L2_CTRL_TYPE_STRING)
1568 sz_extra += 2 * (max + 1);
1569
1570 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1571 if (ctrl == NULL) {
1572 handler_set_err(hdl, -ENOMEM);
1573 return NULL;
1574 }
1575
1576 INIT_LIST_HEAD(&ctrl->node);
77068d36 1577 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1578 ctrl->handler = hdl;
1579 ctrl->ops = ops;
1580 ctrl->id = id;
1581 ctrl->name = name;
1582 ctrl->type = type;
1583 ctrl->flags = flags;
1584 ctrl->minimum = min;
1585 ctrl->maximum = max;
1586 ctrl->step = step;
ce580fe5
SA		 1587 if (type == V4L2_CTRL_TYPE_MENU)
1588 ctrl->qmenu = qmenu;
1589 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1590 ctrl->qmenu_int = qmenu_int;
0996517c
HV		 1591 ctrl->priv = priv;
1592 ctrl->cur.val = ctrl->val = ctrl->default_value = def;
1593
1594 if (ctrl->type == V4L2_CTRL_TYPE_STRING) {
1595 ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1);
1596 ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1);
1597 if (ctrl->minimum)
1598 memset(ctrl->cur.string, ' ', ctrl->minimum);
1599 }
1600 if (handler_new_ref(hdl, ctrl)) {
1601 kfree(ctrl);
1602 return NULL;
1603 }
77e7c4e6 1604 mutex_lock(hdl->lock);
0996517c 1605 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 1606 mutex_unlock(hdl->lock);
0996517c
HV		 1607 return ctrl;
1608}
1609
1610struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
1611 const struct v4l2_ctrl_config *cfg, void *priv)
1612{
1613 bool is_menu;
1614 struct v4l2_ctrl *ctrl;
1615 const char *name = cfg->name;
513521ea 1616 const char * const *qmenu = cfg->qmenu;
ce580fe5 1617 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 1618 enum v4l2_ctrl_type type = cfg->type;
1619 u32 flags = cfg->flags;
1620 s32 min = cfg->min;
1621 s32 max = cfg->max;
1622 u32 step = cfg->step;
1623 s32 def = cfg->def;
1624
1625 if (name == NULL)
1626 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
1627 &def, &flags);
1628
ce580fe5
SA		 1629 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
1630 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 1631 if (is_menu)
1632 WARN_ON(step);
1633 else
1634 WARN_ON(cfg->menu_skip_mask);
ce580fe5 1635 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 1636 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 1637 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
1638 qmenu_int == NULL) {
1639 handler_set_err(hdl, -EINVAL);
1640 return NULL;
1641 }
0996517c
HV		 1642
1643 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name,
1644 type, min, max,
1645 is_menu ? cfg->menu_skip_mask : step,
ce580fe5 1646 def, flags, qmenu, qmenu_int, priv);
88365105 1647 if (ctrl)
0996517c 1648 ctrl->is_private = cfg->is_private;
0996517c
HV		 1649 return ctrl;
1650}
1651EXPORT_SYMBOL(v4l2_ctrl_new_custom);
1652
1653/* Helper function for standard non-menu controls */
1654struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
1655 const struct v4l2_ctrl_ops *ops,
1656 u32 id, s32 min, s32 max, u32 step, s32 def)
1657{
1658 const char *name;
1659 enum v4l2_ctrl_type type;
1660 u32 flags;
1661
1662 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
ce580fe5
SA		 1663 if (type == V4L2_CTRL_TYPE_MENU
1664 || type == V4L2_CTRL_TYPE_INTEGER_MENU) {
0996517c
HV		 1665 handler_set_err(hdl, -EINVAL);
1666 return NULL;
1667 }
1668 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1669 min, max, step, def, flags, NULL, NULL, NULL);
0996517c
HV		 1670}
1671EXPORT_SYMBOL(v4l2_ctrl_new_std);
1672
1673/* Helper function for standard menu controls */
1674struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
1675 const struct v4l2_ctrl_ops *ops,
1676 u32 id, s32 max, s32 mask, s32 def)
1677{
513521ea 1678 const char * const *qmenu = v4l2_ctrl_get_menu(id);
0996517c
HV		 1679 const char *name;
1680 enum v4l2_ctrl_type type;
1681 s32 min;
1682 s32 step;
1683 u32 flags;
1684
1685 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1686 if (type != V4L2_CTRL_TYPE_MENU) {
1687 handler_set_err(hdl, -EINVAL);
1688 return NULL;
1689 }
1690 return v4l2_ctrl_new(hdl, ops, id, name, type,
ce580fe5 1691 0, max, mask, def, flags, qmenu, NULL, NULL);
0996517c
HV		 1692}
1693EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
1694
117a711a
LP		 1695/* Helper function for standard menu controls with driver defined menu */
1696struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
1697 const struct v4l2_ctrl_ops *ops, u32 id, s32 max,
1698 s32 mask, s32 def, const char * const *qmenu)
1699{
1700 enum v4l2_ctrl_type type;
1701 const char *name;
1702 u32 flags;
1703 s32 step;
1704 s32 min;
1705
1706 /* v4l2_ctrl_new_std_menu_items() should only be called for
1707 * standard controls without a standard menu.
1708 */
1709 if (v4l2_ctrl_get_menu(id)) {
1710 handler_set_err(hdl, -EINVAL);
1711 return NULL;
1712 }
1713
1714 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1715 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
1716 handler_set_err(hdl, -EINVAL);
1717 return NULL;
1718 }
1719 return v4l2_ctrl_new(hdl, ops, id, name, type, 0, max, mask, def,
1720 flags, qmenu, NULL, NULL);
1721
1722}
1723EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
1724
515f3287
SN		 1725/* Helper function for standard integer menu controls */
1726struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
1727 const struct v4l2_ctrl_ops *ops,
1728 u32 id, s32 max, s32 def, const s64 *qmenu_int)
1729{
1730 const char *name;
1731 enum v4l2_ctrl_type type;
1732 s32 min;
1733 s32 step;
1734 u32 flags;
1735
1736 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1737 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
1738 handler_set_err(hdl, -EINVAL);
1739 return NULL;
1740 }
1741 return v4l2_ctrl_new(hdl, ops, id, name, type,
1742 0, max, 0, def, flags, NULL, qmenu_int, NULL);
1743}
1744EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
1745
0996517c
HV		 1746/* Add a control from another handler to this handler */
1747struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
1748 struct v4l2_ctrl *ctrl)
1749{
1750 if (hdl == NULL || hdl->error)
1751 return NULL;
1752 if (ctrl == NULL) {
1753 handler_set_err(hdl, -EINVAL);
1754 return NULL;
1755 }
1756 if (ctrl->handler == hdl)
1757 return ctrl;
1758 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
1759}
1760EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
1761
1762/* Add the controls from another handler to our own. */
1763int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 1764 struct v4l2_ctrl_handler *add,
1765 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 1766{
072e6602 1767 struct v4l2_ctrl_ref *ref;
0996517c
HV		 1768 int ret = 0;
1769
1770 /* Do nothing if either handler is NULL or if they are the same */
1771 if (!hdl || !add || hdl == add)
1772 return 0;
1773 if (hdl->error)
1774 return hdl->error;
77e7c4e6 1775 mutex_lock(add->lock);
072e6602
HV		 1776 list_for_each_entry(ref, &add->ctrl_refs, node) {
1777 struct v4l2_ctrl *ctrl = ref->ctrl;
1778
0996517c
HV		 1779 /* Skip handler-private controls. */
1780 if (ctrl->is_private)
1781 continue;
6e239399
HV		 1782 /* And control classes */
1783 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1784 continue;
34a6b7d0
HV		 1785 /* Filter any unwanted controls */
1786 if (filter && !filter(ctrl))
1787 continue;
0996517c
HV		 1788 ret = handler_new_ref(hdl, ctrl);
1789 if (ret)
1790 break;
1791 }
77e7c4e6 1792 mutex_unlock(add->lock);
0996517c
HV		 1793 return ret;
1794}
1795EXPORT_SYMBOL(v4l2_ctrl_add_handler);
1796
34a6b7d0
HV		 1797bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
1798{
1799 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
1800 return true;
1801 switch (ctrl->id) {
1802 case V4L2_CID_AUDIO_MUTE:
1803 case V4L2_CID_AUDIO_VOLUME:
1804 case V4L2_CID_AUDIO_BALANCE:
1805 case V4L2_CID_AUDIO_BASS:
1806 case V4L2_CID_AUDIO_TREBLE:
1807 case V4L2_CID_AUDIO_LOUDNESS:
1808 return true;
1809 default:
1810 break;
1811 }
1812 return false;
1813}
1814EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
1815
0996517c
HV		 1816/* Cluster controls */
1817void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
1818{
5626b8c7 1819 bool has_volatiles = false;
0996517c
HV		 1820 int i;
1821
1822 /* The first control is the master control and it must not be NULL */
72d877ca 1823 BUG_ON(ncontrols == 0 || controls[0] == NULL);
0996517c
HV		 1824
1825 for (i = 0; i < ncontrols; i++) {
1826 if (controls[i]) {
1827 controls[i]->cluster = controls;
1828 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 1829 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
1830 has_volatiles = true;
0996517c
HV		 1831 }
1832 }
5626b8c7 1833 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 1834}
1835EXPORT_SYMBOL(v4l2_ctrl_cluster);
1836
72d877ca
HV		 1837void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
1838 u8 manual_val, bool set_volatile)
1839{
1840 struct v4l2_ctrl *master = controls[0];
5626b8c7 1841 u32 flag = 0;
72d877ca
HV		 1842 int i;
1843
1844 v4l2_ctrl_cluster(ncontrols, controls);
1845 WARN_ON(ncontrols <= 1);
82a7c049 1846 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 1847 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 1848 master->is_auto = true;
5626b8c7 1849 master->has_volatiles = set_volatile;
72d877ca
HV		 1850 master->manual_mode_value = manual_val;
1851 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 1852
1853 if (!is_cur_manual(master))
1854 flag = V4L2_CTRL_FLAG_INACTIVE |
1855 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 1856
1857 for (i = 1; i < ncontrols; i++)
88365105 1858 if (controls[i])
72d877ca 1859 controls[i]->flags |= flag;
72d877ca
HV		 1860}
1861EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
1862
0996517c
HV		 1863/* Activate/deactivate a control. */
1864void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
1865{
6e239399
HV		 1866 /* invert since the actual flag is called 'inactive' */
1867 bool inactive = !active;
1868 bool old;
1869
0996517c
HV		 1870 if (ctrl == NULL)
1871 return;
1872
6e239399 1873 if (inactive)
0996517c 1874 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 1875 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 1876 else
1877 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 1878 old = test_and_clear_bit(4, &ctrl->flags);
1879 if (old != inactive)
1880 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 1881}
1882EXPORT_SYMBOL(v4l2_ctrl_activate);
1883
1884/* Grab/ungrab a control.
1885 Typically used when streaming starts and you want to grab controls,
1886 preventing the user from changing them.
1887
1888 Just call this and the framework will block any attempts to change
1889 these controls. */
1890void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
1891{
6e239399
HV		 1892 bool old;
1893
0996517c
HV		 1894 if (ctrl == NULL)
1895 return;
1896
6e239399 1897 v4l2_ctrl_lock(ctrl);
0996517c
HV		 1898 if (grabbed)
1899 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 1900 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 1901 else
1902 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 1903 old = test_and_clear_bit(1, &ctrl->flags);
1904 if (old != grabbed)
1905 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
1906 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 1907}
1908EXPORT_SYMBOL(v4l2_ctrl_grab);
1909
1910/* Log the control name and value */
1911static void log_ctrl(const struct v4l2_ctrl *ctrl,
1912 const char *prefix, const char *colon)
1913{
0996517c
HV		 1914 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
1915 return;
1916 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
1917 return;
1918
1919 printk(KERN_INFO "%s%s%s: ", prefix, colon, ctrl->name);
1920
1921 switch (ctrl->type) {
1922 case V4L2_CTRL_TYPE_INTEGER:
1923 printk(KERN_CONT "%d", ctrl->cur.val);
1924 break;
1925 case V4L2_CTRL_TYPE_BOOLEAN:
1926 printk(KERN_CONT "%s", ctrl->cur.val ? "true" : "false");
1927 break;
1928 case V4L2_CTRL_TYPE_MENU:
1929 printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]);
1930 break;
ce580fe5
SA		 1931 case V4L2_CTRL_TYPE_INTEGER_MENU:
1932 printk(KERN_CONT "%lld", ctrl->qmenu_int[ctrl->cur.val]);
1933 break;
fa4d7096
HV		 1934 case V4L2_CTRL_TYPE_BITMASK:
1935 printk(KERN_CONT "0x%08x", ctrl->cur.val);
1936 break;
0996517c
HV		 1937 case V4L2_CTRL_TYPE_INTEGER64:
1938 printk(KERN_CONT "%lld", ctrl->cur.val64);
1939 break;
1940 case V4L2_CTRL_TYPE_STRING:
1941 printk(KERN_CONT "%s", ctrl->cur.string);
1942 break;
1943 default:
1944 printk(KERN_CONT "unknown type %d", ctrl->type);
1945 break;
1946 }
88365105
HV		 1947 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
1948 V4L2_CTRL_FLAG_GRABBED |
1949 V4L2_CTRL_FLAG_VOLATILE)) {
1950 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
1951 printk(KERN_CONT " inactive");
1952 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
1953 printk(KERN_CONT " grabbed");
1954 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
1955 printk(KERN_CONT " volatile");
1956 }
1957 printk(KERN_CONT "\n");
0996517c
HV		 1958}
1959
1960/* Log all controls owned by the handler */
1961void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
1962 const char *prefix)
1963{
1964 struct v4l2_ctrl *ctrl;
1965 const char *colon = "";
1966 int len;
1967
1968 if (hdl == NULL)
1969 return;
1970 if (prefix == NULL)
1971 prefix = "";
1972 len = strlen(prefix);
1973 if (len && prefix[len - 1] != ' ')
1974 colon = ": ";
77e7c4e6 1975 mutex_lock(hdl->lock);
0996517c
HV		 1976 list_for_each_entry(ctrl, &hdl->ctrls, node)
1977 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
1978 log_ctrl(ctrl, prefix, colon);
77e7c4e6 1979 mutex_unlock(hdl->lock);
0996517c
HV		 1980}
1981EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
1982
1983/* Call s_ctrl for all controls owned by the handler */
1984int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
1985{
1986 struct v4l2_ctrl *ctrl;
1987 int ret = 0;
1988
1989 if (hdl == NULL)
1990 return 0;
77e7c4e6 1991 mutex_lock(hdl->lock);
0996517c
HV		 1992 list_for_each_entry(ctrl, &hdl->ctrls, node)
1993 ctrl->done = false;
1994
1995 list_for_each_entry(ctrl, &hdl->ctrls, node) {
1996 struct v4l2_ctrl *master = ctrl->cluster[0];
1997 int i;
1998
1999 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2000 /* Skip button controls and read-only controls. */
2001 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2002 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2003 continue;
2004
2a863793
HV		 2005 for (i = 0; i < master->ncontrols; i++) {
2006 if (master->cluster[i]) {
2007 cur_to_new(master->cluster[i]);
2008 master->cluster[i]->is_new = 1;
71c6c4c9 2009 master->cluster[i]->done = true;
2a863793
HV		 2010 }
2011 }
54c911eb 2012 ret = call_op(master, s_ctrl);
0996517c
HV		 2013 if (ret)
2014 break;
0996517c 2015 }
77e7c4e6 2016 mutex_unlock(hdl->lock);
0996517c
HV		 2017 return ret;
2018}
2019EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2020
2021/* Implement VIDIOC_QUERYCTRL */
2022int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2023{
2024 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2025 struct v4l2_ctrl_ref *ref;
2026 struct v4l2_ctrl *ctrl;
2027
2028 if (hdl == NULL)
2029 return -EINVAL;
2030
77e7c4e6 2031 mutex_lock(hdl->lock);
0996517c
HV		 2032
2033 /* Try to find it */
2034 ref = find_ref(hdl, id);
2035
2036 if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) {
2037 /* Find the next control with ID > qc->id */
2038
2039 /* Did we reach the end of the control list? */
2040 if (id >= node2id(hdl->ctrl_refs.prev)) {
2041 ref = NULL; /* Yes, so there is no next control */
2042 } else if (ref) {
2043 /* We found a control with the given ID, so just get
2044 the next one in the list. */
2045 ref = list_entry(ref->node.next, typeof(*ref), node);
2046 } else {
2047 /* No control with the given ID exists, so start
2048 searching for the next largest ID. We know there
2049 is one, otherwise the first 'if' above would have
2050 been true. */
2051 list_for_each_entry(ref, &hdl->ctrl_refs, node)
2052 if (id < ref->ctrl->id)
2053 break;
2054 }
2055 }
77e7c4e6 2056 mutex_unlock(hdl->lock);
0996517c
HV		 2057 if (!ref)
2058 return -EINVAL;
2059
2060 ctrl = ref->ctrl;
2061 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2062 if (id >= V4L2_CID_PRIVATE_BASE)
2063 qc->id = id;
2064 else
2065 qc->id = ctrl->id;
0996517c
HV		 2066 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
2067 qc->minimum = ctrl->minimum;
2068 qc->maximum = ctrl->maximum;
2069 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2070 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2071 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2072 qc->step = 1;
2073 else
2074 qc->step = ctrl->step;
2075 qc->flags = ctrl->flags;
2076 qc->type = ctrl->type;
2077 return 0;
2078}
2079EXPORT_SYMBOL(v4l2_queryctrl);
2080
2081int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2082{
87a0c94c
HV		 2083 if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL)
2084 return -EINVAL;
0996517c
HV		 2085 return v4l2_queryctrl(sd->ctrl_handler, qc);
2086}
2087EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2088
2089/* Implement VIDIOC_QUERYMENU */
2090int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2091{
2092 struct v4l2_ctrl *ctrl;
2093 u32 i = qm->index;
2094
2095 ctrl = v4l2_ctrl_find(hdl, qm->id);
2096 if (!ctrl)
2097 return -EINVAL;
2098
2099 qm->reserved = 0;
2100 /* Sanity checks */
ce580fe5
SA		 2101 switch (ctrl->type) {
2102 case V4L2_CTRL_TYPE_MENU:
2103 if (ctrl->qmenu == NULL)
2104 return -EINVAL;
2105 break;
2106 case V4L2_CTRL_TYPE_INTEGER_MENU:
2107 if (ctrl->qmenu_int == NULL)
2108 return -EINVAL;
2109 break;
2110 default:
2111 return -EINVAL;
2112 }
2113
2114 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2115 return -EINVAL;
ce580fe5 2116
0996517c
HV		 2117 /* Use mask to see if this menu item should be skipped */
2118 if (ctrl->menu_skip_mask & (1 << i))
2119 return -EINVAL;
2120 /* Empty menu items should also be skipped */
ce580fe5
SA		 2121 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2122 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2123 return -EINVAL;
2124 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2125 } else {
2126 qm->value = ctrl->qmenu_int[i];
2127 }
0996517c
HV		 2128 return 0;
2129}
2130EXPORT_SYMBOL(v4l2_querymenu);
2131
2132int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2133{
2134 return v4l2_querymenu(sd->ctrl_handler, qm);
2135}
2136EXPORT_SYMBOL(v4l2_subdev_querymenu);
2137
2138
2139
2140/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2141
2142 It is not a fully atomic operation, just best-effort only. After all, if
2143 multiple controls have to be set through multiple i2c writes (for example)
2144 then some initial writes may succeed while others fail. Thus leaving the
2145 system in an inconsistent state. The question is how much effort you are
2146 willing to spend on trying to make something atomic that really isn't.
2147
2148 From the point of view of an application the main requirement is that
2149 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2150 error should be returned without actually affecting any controls.
2151
2152 If all the values are correct, then it is acceptable to just give up
2153 in case of low-level errors.
2154
2155 It is important though that the application can tell when only a partial
2156 configuration was done. The way we do that is through the error_idx field
2157 of struct v4l2_ext_controls: if that is equal to the count field then no
2158 controls were affected. Otherwise all controls before that index were
2159 successful in performing their 'get' or 'set' operation, the control at
2160 the given index failed, and you don't know what happened with the controls
2161 after the failed one. Since if they were part of a control cluster they
2162 could have been successfully processed (if a cluster member was encountered
2163 at index < error_idx), they could have failed (if a cluster member was at
2164 error_idx), or they may not have been processed yet (if the first cluster
2165 member appeared after error_idx).
2166
2167 It is all fairly theoretical, though. In practice all you can do is to
2168 bail out. If error_idx == count, then it is an application bug. If
2169 error_idx < count then it is only an application bug if the error code was
2170 EBUSY. That usually means that something started streaming just when you
2171 tried to set the controls. In all other cases it is a driver/hardware
2172 problem and all you can do is to retry or bail out.
2173
2174 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2175 never modifies controls the error_idx is just set to whatever control
2176 has an invalid value.
2177 */
2178
2179/* Prepare for the extended g/s/try functions.
2180 Find the controls in the control array and do some basic checks. */
2181static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2182 struct v4l2_ext_controls *cs,
eb5b16ef 2183 struct v4l2_ctrl_helper *helpers)
0996517c 2184{
eb5b16ef
HV		 2185 struct v4l2_ctrl_helper *h;
2186 bool have_clusters = false;
0996517c
HV		 2187 u32 i;
2188
eb5b16ef 2189 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2190 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2191 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2192 struct v4l2_ctrl *ctrl;
2193 u32 id = c->id & V4L2_CTRL_ID_MASK;
2194
37cd3b73 2195 cs->error_idx = i;
0996517c
HV		 2196
2197 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2198 return -EINVAL;
2199
2200 /* Old-style private controls are not allowed for
2201 extended controls */
2202 if (id >= V4L2_CID_PRIVATE_BASE)
2203 return -EINVAL;
eb5b16ef
HV		 2204 ref = find_ref_lock(hdl, id);
2205 if (ref == NULL)
0996517c 2206 return -EINVAL;
eb5b16ef 2207 ctrl = ref->ctrl;
0996517c
HV		 2208 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2209 return -EINVAL;
2210
eb5b16ef
HV		 2211 if (ctrl->cluster[0]->ncontrols > 1)
2212 have_clusters = true;
2213 if (ctrl->cluster[0] != ctrl)
2214 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
2215 /* Store the ref to the master control of the cluster */
2216 h->mref = ref;
2217 h->ctrl = ctrl;
2218 /* Initially set next to 0, meaning that there is no other
2219 control in this helper array belonging to the same
2220 cluster */
2221 h->next = 0;
0996517c 2222 }
0996517c 2223
eb5b16ef
HV		 2224 /* We are done if there were no controls that belong to a multi-
2225 control cluster. */
2226 if (!have_clusters)
2227 return 0;
0996517c 2228
eb5b16ef
HV		 2229 /* The code below figures out in O(n) time which controls in the list
2230 belong to the same cluster. */
0996517c 2231
eb5b16ef 2232 /* This has to be done with the handler lock taken. */
77e7c4e6 2233 mutex_lock(hdl->lock);
0996517c 2234
eb5b16ef
HV		 2235 /* First zero the helper field in the master control references */
2236 for (i = 0; i < cs->count; i++)
c082266f 2237 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2238 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2239 struct v4l2_ctrl_ref *mref = h->mref;
2240
2241 /* If the mref->helper is set, then it points to an earlier
2242 helper that belongs to the same cluster. */
2243 if (mref->helper) {
2244 /* Set the next field of mref->helper to the current
2245 index: this means that that earlier helper now
2246 points to the next helper in the same cluster. */
2247 mref->helper->next = i;
2248 /* mref should be set only for the first helper in the
2249 cluster, clear the others. */
2250 h->mref = NULL;
2251 }
2252 /* Point the mref helper to the current helper struct. */
2253 mref->helper = h;
0996517c 2254 }
77e7c4e6 2255 mutex_unlock(hdl->lock);
eb5b16ef 2256 return 0;
0996517c
HV		 2257}
2258
2259/* Handles the corner case where cs->count == 0. It checks whether the
2260 specified control class exists. If that class ID is 0, then it checks
2261 whether there are any controls at all. */
2262static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2263{
2264 if (ctrl_class == 0)
2265 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2266 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2267}
2268
2269
2270
2271/* Get extended controls. Allocates the helpers array if needed. */
2272int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2273{
eb5b16ef
HV		 2274 struct v4l2_ctrl_helper helper[4];
2275 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2276 int ret;
ddac5c10 2277 int i, j;
0996517c
HV		 2278
2279 cs->error_idx = cs->count;
2280 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2281
2282 if (hdl == NULL)
2283 return -EINVAL;
2284
2285 if (cs->count == 0)
2286 return class_check(hdl, cs->ctrl_class);
2287
2288 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2289 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2290 GFP_KERNEL);
0996517c
HV		 2291 if (helpers == NULL)
2292 return -ENOMEM;
2293 }
2294
37cd3b73
HV		 2295 ret = prepare_ext_ctrls(hdl, cs, helpers);
2296 cs->error_idx = cs->count;
0996517c
HV		 2297
2298 for (i = 0; !ret && i < cs->count; i++)
2299 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2300 ret = -EACCES;
2301
2302 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2303 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2304 struct v4l2_ctrl *ctrl) = cur_to_user;
2305 struct v4l2_ctrl *master;
0996517c 2306
eb5b16ef 2307 if (helpers[i].mref == NULL)
0996517c
HV		 2308 continue;
2309
eb5b16ef 2310 master = helpers[i].mref->ctrl;
0996517c
HV		 2311 cs->error_idx = i;
2312
2313 v4l2_ctrl_lock(master);
ddac5c10
HV		 2314
2315 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2316 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2317 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2318 for (j = 0; j < master->ncontrols; j++)
2319 cur_to_new(master->cluster[j]);
54c911eb 2320 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2321 ctrl_to_user = new_to_user;
ddac5c10
HV		 2322 }
2323 /* If OK, then copy the current (for non-volatile controls)
2324 or the new (for volatile controls) control values to the
2325 caller */
eb5b16ef
HV		 2326 if (!ret) {
2327 u32 idx = i;
2328
2329 do {
2330 ret = ctrl_to_user(cs->controls + idx,
2331 helpers[idx].ctrl);
2332 idx = helpers[idx].next;
2333 } while (!ret && idx);
2334 }
0996517c 2335 v4l2_ctrl_unlock(master);
0996517c
HV		 2336 }
2337
2338 if (cs->count > ARRAY_SIZE(helper))
2339 kfree(helpers);
2340 return ret;
2341}
2342EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2343
2344int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2345{
2346 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2347}
2348EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2349
2350/* Helper function to get a single control */
03d5285b 2351static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2352{
2353 struct v4l2_ctrl *master = ctrl->cluster[0];
2354 int ret = 0;
ddac5c10 2355 int i;
0996517c 2356
03d5285b
LP		 2357 /* String controls are not supported. The new_to_user() and
2358 * cur_to_user() calls below would need to be modified not to access
2359 * userspace memory when called from get_ctrl().
2360 */
2361 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
2362 return -EINVAL;
2363
0996517c
HV		 2364 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2365 return -EACCES;
2366
2367 v4l2_ctrl_lock(master);
2368 /* g_volatile_ctrl will update the current control values */
5626b8c7 2369 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2370 for (i = 0; i < master->ncontrols; i++)
2371 cur_to_new(master->cluster[i]);
54c911eb 2372 ret = call_op(master, g_volatile_ctrl);
03d5285b 2373 new_to_user(c, ctrl);
ddac5c10 2374 } else {
03d5285b 2375 cur_to_user(c, ctrl);
ddac5c10 2376 }
0996517c
HV		 2377 v4l2_ctrl_unlock(master);
2378 return ret;
2379}
2380
2381int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2382{
2383 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2384 struct v4l2_ext_control c;
2385 int ret;
0996517c
HV		 2386
2387 if (ctrl == NULL || !type_is_int(ctrl))
2388 return -EINVAL;
03d5285b
LP		 2389 ret = get_ctrl(ctrl, &c);
2390 control->value = c.value;
2391 return ret;
0996517c
HV		 2392}
2393EXPORT_SYMBOL(v4l2_g_ctrl);
2394
2395int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2396{
2397 return v4l2_g_ctrl(sd->ctrl_handler, control);
2398}
2399EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2400
2401s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2402{
03d5285b 2403 struct v4l2_ext_control c;
0996517c
HV		 2404
2405 /* It's a driver bug if this happens. */
2406 WARN_ON(!type_is_int(ctrl));
03d5285b
LP		 2407 c.value = 0;
2408 get_ctrl(ctrl, &c);
2409 return c.value;
0996517c
HV		 2410}
2411EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2412
03d5285b
LP		 2413s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2414{
2415 struct v4l2_ext_control c;
2416
2417 /* It's a driver bug if this happens. */
2418 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
2419 c.value = 0;
2420 get_ctrl(ctrl, &c);
2421 return c.value;
2422}
2423EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2424
0996517c
HV		 2425
2426/* Core function that calls try/s_ctrl and ensures that the new value is
2427 copied to the current value on a set.
2428 Must be called with ctrl->handler->lock held. */
e6402585
HV		 2429static int try_or_set_cluster(struct v4l2_fh *fh,
2430 struct v4l2_ctrl *master, bool set)
0996517c 2431{
72d877ca 2432 bool update_flag;
eb5b16ef 2433 int ret;
0996517c
HV		 2434 int i;
2435
2436 /* Go through the cluster and either validate the new value or
2437 (if no new value was set), copy the current value to the new
2438 value, ensuring a consistent view for the control ops when
2439 called. */
eb5b16ef 2440 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2441 struct v4l2_ctrl *ctrl = master->cluster[i];
2442
2443 if (ctrl == NULL)
2444 continue;
2445
eb5b16ef
HV		 2446 if (!ctrl->is_new) {
2447 cur_to_new(ctrl);
0996517c
HV		 2448 continue;
2449 }
eb5b16ef
HV		 2450 /* Check again: it may have changed since the
2451 previous check in try_or_set_ext_ctrls(). */
2452 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2453 return -EBUSY;
0996517c
HV		 2454 }
2455
eb5b16ef 2456 ret = call_op(master, try_ctrl);
0996517c
HV		 2457
2458 /* Don't set if there is no change */
72d877ca
HV		 2459 if (ret || !set || !cluster_changed(master))
2460 return ret;
2461 ret = call_op(master, s_ctrl);
72d877ca
HV		 2462 if (ret)
2463 return ret;
2464
eb5b16ef 2465 /* If OK, then make the new values permanent. */
72d877ca
HV		 2466 update_flag = is_cur_manual(master) != is_new_manual(master);
2467 for (i = 0; i < master->ncontrols; i++)
ab892bac 2468 new_to_cur(fh, master->cluster[i], update_flag && i > 0);
72d877ca 2469 return 0;
0996517c
HV		 2470}
2471
e6402585
HV		 2472/* Validate controls. */
2473static int validate_ctrls(struct v4l2_ext_controls *cs,
2474 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 2475{
e6402585 2476 unsigned i;
0996517c
HV		 2477 int ret = 0;
2478
eb5b16ef 2479 cs->error_idx = cs->count;
0996517c
HV		 2480 for (i = 0; i < cs->count; i++) {
2481 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
2482
e6402585 2483 cs->error_idx = i;
0996517c
HV		 2484
2485 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2486 return -EACCES;
2487 /* This test is also done in try_set_control_cluster() which
2488 is called in atomic context, so that has the final say,
2489 but it makes sense to do an up-front check as well. Once
2490 an error occurs in try_set_control_cluster() some other
2491 controls may have been set already and we want to do a
2492 best-effort to avoid that. */
2493 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2494 return -EBUSY;
eb5b16ef
HV		 2495 ret = validate_new(ctrl, &cs->controls[i]);
2496 if (ret)
2497 return ret;
0996517c 2498 }
e6402585
HV		 2499 return 0;
2500}
2501
5626b8c7
HV		 2502/* Obtain the current volatile values of an autocluster and mark them
2503 as new. */
2504static void update_from_auto_cluster(struct v4l2_ctrl *master)
2505{
2506 int i;
2507
2508 for (i = 0; i < master->ncontrols; i++)
2509 cur_to_new(master->cluster[i]);
2510 if (!call_op(master, g_volatile_ctrl))
2511 for (i = 1; i < master->ncontrols; i++)
2512 if (master->cluster[i])
2513 master->cluster[i]->is_new = 1;
2514}
2515
e6402585
HV		 2516/* Try or try-and-set controls */
2517static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2518 struct v4l2_ext_controls *cs,
2519 bool set)
2520{
2521 struct v4l2_ctrl_helper helper[4];
2522 struct v4l2_ctrl_helper *helpers = helper;
2523 unsigned i, j;
2524 int ret;
2525
2526 cs->error_idx = cs->count;
2527 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2528
2529 if (hdl == NULL)
2530 return -EINVAL;
2531
2532 if (cs->count == 0)
2533 return class_check(hdl, cs->ctrl_class);
0996517c 2534
e6402585 2535 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 2536 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2537 GFP_KERNEL);
e6402585
HV		 2538 if (!helpers)
2539 return -ENOMEM;
2540 }
2541 ret = prepare_ext_ctrls(hdl, cs, helpers);
2542 if (!ret)
2543 ret = validate_ctrls(cs, helpers, set);
2544 if (ret && set)
2545 cs->error_idx = cs->count;
0996517c 2546 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2547 struct v4l2_ctrl *master;
2548 u32 idx = i;
0996517c 2549
eb5b16ef 2550 if (helpers[i].mref == NULL)
0996517c
HV		 2551 continue;
2552
37cd3b73 2553 cs->error_idx = i;
eb5b16ef
HV		 2554 master = helpers[i].mref->ctrl;
2555 v4l2_ctrl_lock(master);
0996517c 2556
2a863793 2557 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2558 for (j = 0; j < master->ncontrols; j++)
2559 if (master->cluster[j])
2a863793 2560 master->cluster[j]->is_new = 0;
0996517c 2561
5626b8c7
HV		 2562 /* For volatile autoclusters that are currently in auto mode
2563 we need to discover if it will be set to manual mode.
2564 If so, then we have to copy the current volatile values
2565 first since those will become the new manual values (which
2566 may be overwritten by explicit new values from this set
2567 of controls). */
2568 if (master->is_auto && master->has_volatiles &&
2569 !is_cur_manual(master)) {
2570 /* Pick an initial non-manual value */
2571 s32 new_auto_val = master->manual_mode_value + 1;
2572 u32 tmp_idx = idx;
2573
2574 do {
2575 /* Check if the auto control is part of the
2576 list, and remember the new value. */
2577 if (helpers[tmp_idx].ctrl == master)
2578 new_auto_val = cs->controls[tmp_idx].value;
2579 tmp_idx = helpers[tmp_idx].next;
2580 } while (tmp_idx);
2581 /* If the new value == the manual value, then copy
2582 the current volatile values. */
2583 if (new_auto_val == master->manual_mode_value)
2584 update_from_auto_cluster(master);
2585 }
2586
0996517c 2587 /* Copy the new caller-supplied control values.
2a863793 2588 user_to_new() sets 'is_new' to 1. */
eb5b16ef
HV		 2589 do {
2590 ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
2591 idx = helpers[idx].next;
2592 } while (!ret && idx);
0996517c
HV		 2593
2594 if (!ret)
e6402585 2595 ret = try_or_set_cluster(fh, master, set);
0996517c
HV		 2596
2597 /* Copy the new values back to userspace. */
eb5b16ef
HV		 2598 if (!ret) {
2599 idx = i;
2600 do {
adf41b9b 2601 ret = new_to_user(cs->controls + idx,
e6402585 2602 helpers[idx].ctrl);
eb5b16ef
HV		 2603 idx = helpers[idx].next;
2604 } while (!ret && idx);
2605 }
2606 v4l2_ctrl_unlock(master);
0996517c 2607 }
0996517c 2608
0996517c
HV		 2609 if (cs->count > ARRAY_SIZE(helper))
2610 kfree(helpers);
2611 return ret;
2612}
2613
2614int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2615{
ab892bac 2616 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 2617}
2618EXPORT_SYMBOL(v4l2_try_ext_ctrls);
2619
ab892bac
HV		 2620int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2621 struct v4l2_ext_controls *cs)
0996517c 2622{
ab892bac 2623 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 2624}
2625EXPORT_SYMBOL(v4l2_s_ext_ctrls);
2626
2627int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2628{
ab892bac 2629 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 2630}
2631EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
2632
2633int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2634{
ab892bac 2635 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 2636}
2637EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
2638
2639/* Helper function for VIDIOC_S_CTRL compatibility */
03d5285b
LP		 2640static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
2641 struct v4l2_ext_control *c)
0996517c
HV		 2642{
2643 struct v4l2_ctrl *master = ctrl->cluster[0];
2644 int ret;
2645 int i;
2646
03d5285b
LP		 2647 /* String controls are not supported. The user_to_new() and
2648 * cur_to_user() calls below would need to be modified not to access
2649 * userspace memory when called from set_ctrl().
2650 */
2651 if (ctrl->type == V4L2_CTRL_TYPE_STRING)
2652 return -EINVAL;
2653
2654 ret = validate_new(ctrl, c);
eb5b16ef
HV		 2655 if (ret)
2656 return ret;
2657
0996517c
HV		 2658 v4l2_ctrl_lock(ctrl);
2659
2a863793 2660 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2661 for (i = 0; i < master->ncontrols; i++)
2662 if (master->cluster[i])
2a863793 2663 master->cluster[i]->is_new = 0;
0996517c 2664
5626b8c7
HV		 2665 /* For autoclusters with volatiles that are switched from auto to
2666 manual mode we have to update the current volatile values since
2667 those will become the initial manual values after such a switch. */
2668 if (master->is_auto && master->has_volatiles && ctrl == master &&
03d5285b 2669 !is_cur_manual(master) && c->value == master->manual_mode_value)
5626b8c7 2670 update_from_auto_cluster(master);
03d5285b
LP		 2671
2672 user_to_new(c, ctrl);
e6402585 2673 ret = try_or_set_cluster(fh, master, true);
03d5285b
LP		 2674 cur_to_user(c, ctrl);
2675
0996517c
HV		 2676 v4l2_ctrl_unlock(ctrl);
2677 return ret;
2678}
2679
ab892bac
HV		 2680int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2681 struct v4l2_control *control)
0996517c
HV		 2682{
2683 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2684 struct v4l2_ext_control c;
2685 int ret;
0996517c
HV		 2686
2687 if (ctrl == NULL || !type_is_int(ctrl))
2688 return -EINVAL;
2689
7ebbc39f
HV		 2690 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2691 return -EACCES;
2692
03d5285b
LP		 2693 c.value = control->value;
2694 ret = set_ctrl(fh, ctrl, &c);
2695 control->value = c.value;
2696 return ret;
0996517c
HV		 2697}
2698EXPORT_SYMBOL(v4l2_s_ctrl);
2699
2700int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2701{
ab892bac 2702 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 2703}
2704EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
2705
2706int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
2707{
03d5285b
LP		 2708 struct v4l2_ext_control c;
2709
0996517c
HV		 2710 /* It's a driver bug if this happens. */
2711 WARN_ON(!type_is_int(ctrl));
03d5285b
LP		 2712 c.value = val;
2713 return set_ctrl(NULL, ctrl, &c);
0996517c
HV		 2714}
2715EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
6e239399 2716
03d5285b
LP		 2717int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
2718{
2719 struct v4l2_ext_control c;
2720
2721 /* It's a driver bug if this happens. */
2722 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
2723 c.value64 = val;
2724 return set_ctrl(NULL, ctrl, &c);
2725}
2726EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64);
2727
8ac7a949
HV		 2728void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
2729{
2730 if (ctrl == NULL)
2731 return;
2732 if (notify == NULL) {
2733 ctrl->call_notify = 0;
2734 return;
2735 }
2736 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
2737 return;
2738 ctrl->handler->notify = notify;
2739 ctrl->handler->notify_priv = priv;
2740 ctrl->call_notify = 1;
2741}
2742EXPORT_SYMBOL(v4l2_ctrl_notify);
2743
6e6d76cd 2744static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 2745{
3e366149
HG		 2746 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2747
2748 if (ctrl == NULL)
2749 return -EINVAL;
2750
6e239399 2751 v4l2_ctrl_lock(ctrl);
77068d36 2752 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 2753 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 2754 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 2755 struct v4l2_event ev;
c12fcfd6 2756 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 2757
c12fcfd6
HV		 2758 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
2759 changes |= V4L2_EVENT_CTRL_CH_VALUE;
2760 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 2761 /* Mark the queue as active, allowing this initial
2762 event to be accepted. */
2763 sev->elems = elems;
77068d36 2764 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 2765 }
2766 v4l2_ctrl_unlock(ctrl);
3e366149 2767 return 0;
6e239399 2768}
6e239399 2769
3e366149 2770static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 2771{
3e366149
HG		 2772 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
2773
6e239399 2774 v4l2_ctrl_lock(ctrl);
77068d36 2775 list_del(&sev->node);
6e239399
HV		 2776 v4l2_ctrl_unlock(ctrl);
2777}
3e366149
HG		 2778
2779void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
2780{
2781 u32 old_changes = old->u.ctrl.changes;
2782
2783 old->u.ctrl = new->u.ctrl;
2784 old->u.ctrl.changes |= old_changes;
2785}
2786EXPORT_SYMBOL(v4l2_ctrl_replace);
2787
2788void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
2789{
2790 new->u.ctrl.changes |= old->u.ctrl.changes;
2791}
2792EXPORT_SYMBOL(v4l2_ctrl_merge);
2793
2794const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
2795 .add = v4l2_ctrl_add_event,
2796 .del = v4l2_ctrl_del_event,
2797 .replace = v4l2_ctrl_replace,
2798 .merge = v4l2_ctrl_merge,
2799};
2800EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 2801
2802int v4l2_ctrl_log_status(struct file *file, void *fh)
2803{
2804 struct video_device *vfd = video_devdata(file);
2805 struct v4l2_fh *vfh = file->private_data;
2806
2807 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
2808 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
2809 vfd->v4l2_dev->name);
2810 return 0;
2811}
2812EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 2813
2814int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 2815 const struct v4l2_event_subscription *sub)
a26243b0
HV		 2816{
2817 if (sub->type == V4L2_EVENT_CTRL)
3e366149 2818 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 2819 return -EINVAL;
2820}
2821EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
2822
2823unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
2824{
2825 struct v4l2_fh *fh = file->private_data;
2826
2827 if (v4l2_event_pending(fh))
2828 return POLLPRI;
2829 poll_wait(file, &fh->wait, wait);
2830 return 0;
2831}
2832EXPORT_SYMBOL(v4l2_ctrl_poll);
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