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[media] v4l2-ctrls: create type_ops
[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",
fc39f46b 237 "Matrix",
cf072139
SN		 238 NULL
239 };
2272ab65
SN		 240 static const char * const camera_auto_focus_range[] = {
241 "Auto",
242 "Normal",
243 "Macro",
244 "Infinity",
245 NULL
246 };
513521ea 247 static const char * const colorfx[] = {
0996517c
HV		 248 "None",
249 "Black & White",
250 "Sepia",
251 "Negative",
252 "Emboss",
253 "Sketch",
064f5096
KD		 254 "Sky Blue",
255 "Grass Green",
256 "Skin Whiten",
0996517c 257 "Vivid",
6491d1ad
SN		 258 "Aqua",
259 "Art Freeze",
260 "Silhouette",
261 "Solarization",
262 "Antique",
263 "Set Cb/Cr",
0996517c
HV		 264 NULL
265 };
e40a0573
SN		 266 static const char * const auto_n_preset_white_balance[] = {
267 "Manual",
268 "Auto",
269 "Incandescent",
270 "Fluorescent",
271 "Fluorescent H",
272 "Horizon",
273 "Daylight",
274 "Flash",
275 "Cloudy",
276 "Shade",
277 NULL,
278 };
7f84ad8b
SN		 279 static const char * const camera_iso_sensitivity_auto[] = {
280 "Manual",
281 "Auto",
282 NULL
283 };
0bf6b7dc
SN		 284 static const char * const scene_mode[] = {
285 "None",
286 "Backlight",
287 "Beach/Snow",
288 "Candle Light",
289 "Dusk/Dawn",
290 "Fall Colors",
291 "Fireworks",
292 "Landscape",
293 "Night",
294 "Party/Indoor",
295 "Portrait",
296 "Sports",
297 "Sunset",
298 "Text",
299 NULL
300 };
aec330a8
AS		 301 static const char * const tune_emphasis[] = {
302 "None",
f769c260
HV		 303 "50 Microseconds",
304 "75 Microseconds",
0996517c
HV		 305 NULL,
306 };
064f5096
KD		 307 static const char * const header_mode[] = {
308 "Separate Buffer",
309 "Joined With 1st Frame",
310 NULL,
311 };
312 static const char * const multi_slice[] = {
313 "Single",
314 "Max Macroblocks",
315 "Max Bytes",
316 NULL,
317 };
318 static const char * const entropy_mode[] = {
319 "CAVLC",
320 "CABAC",
321 NULL,
322 };
323 static const char * const mpeg_h264_level[] = {
324 "1",
325 "1b",
326 "1.1",
327 "1.2",
328 "1.3",
329 "2",
330 "2.1",
331 "2.2",
332 "3",
333 "3.1",
334 "3.2",
335 "4",
336 "4.1",
337 "4.2",
338 "5",
339 "5.1",
340 NULL,
341 };
342 static const char * const h264_loop_filter[] = {
343 "Enabled",
344 "Disabled",
345 "Disabled at Slice Boundary",
346 NULL,
347 };
348 static const char * const h264_profile[] = {
349 "Baseline",
350 "Constrained Baseline",
351 "Main",
352 "Extended",
353 "High",
354 "High 10",
355 "High 422",
356 "High 444 Predictive",
357 "High 10 Intra",
358 "High 422 Intra",
359 "High 444 Intra",
360 "CAVLC 444 Intra",
361 "Scalable Baseline",
362 "Scalable High",
363 "Scalable High Intra",
364 "Multiview High",
365 NULL,
366 };
367 static const char * const vui_sar_idc[] = {
368 "Unspecified",
369 "1:1",
370 "12:11",
371 "10:11",
372 "16:11",
373 "40:33",
374 "24:11",
375 "20:11",
376 "32:11",
377 "80:33",
378 "18:11",
379 "15:11",
380 "64:33",
381 "160:99",
382 "4:3",
383 "3:2",
384 "2:1",
385 "Extended SAR",
386 NULL,
387 };
2e81dde9
AK		 388 static const char * const h264_fp_arrangement_type[] = {
389 "Checkerboard",
390 "Column",
391 "Row",
392 "Side by Side",
393 "Top Bottom",
394 "Temporal",
395 NULL,
396 };
397 static const char * const h264_fmo_map_type[] = {
398 "Interleaved Slices",
399 "Scattered Slices",
400 "Foreground with Leftover",
401 "Box Out",
402 "Raster Scan",
403 "Wipe Scan",
404 "Explicit",
405 NULL,
406 };
064f5096
KD		 407 static const char * const mpeg_mpeg4_level[] = {
408 "0",
409 "0b",
410 "1",
411 "2",
412 "3",
413 "3b",
414 "4",
415 "5",
416 NULL,
417 };
418 static const char * const mpeg4_profile[] = {
419 "Simple",
f769c260 420 "Advanced Simple",
064f5096
KD		 421 "Core",
422 "Simple Scalable",
39c1cb2b 423 "Advanced Coding Efficiency",
064f5096
KD		 424 NULL,
425 };
426
bc9028e1
AK		 427 static const char * const vpx_golden_frame_sel[] = {
428 "Use Previous Frame",
429 "Use Previous Specific Frame",
430 NULL,
431 };
432
0b159acd
SA		 433 static const char * const flash_led_mode[] = {
434 "Off",
435 "Flash",
436 "Torch",
437 NULL,
438 };
439 static const char * const flash_strobe_source[] = {
440 "Software",
441 "External",
442 NULL,
443 };
0996517c 444
c7361ae1
SN		 445 static const char * const jpeg_chroma_subsampling[] = {
446 "4:4:4",
447 "4:2:2",
448 "4:2:0",
449 "4:1:1",
450 "4:1:0",
451 "Gray",
452 NULL,
453 };
977ebec7
HV		 454 static const char * const dv_tx_mode[] = {
455 "DVI-D",
456 "HDMI",
457 NULL,
458 };
459 static const char * const dv_rgb_range[] = {
460 "Automatic",
461 "RGB limited range (16-235)",
462 "RGB full range (0-255)",
463 NULL,
464 };
465
c7361ae1 466
0996517c
HV		 467 switch (id) {
468 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
469 return mpeg_audio_sampling_freq;
470 case V4L2_CID_MPEG_AUDIO_ENCODING:
471 return mpeg_audio_encoding;
472 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
473 return mpeg_audio_l1_bitrate;
474 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
475 return mpeg_audio_l2_bitrate;
476 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
477 return mpeg_audio_l3_bitrate;
478 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
479 return mpeg_audio_ac3_bitrate;
480 case V4L2_CID_MPEG_AUDIO_MODE:
481 return mpeg_audio_mode;
482 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
483 return mpeg_audio_mode_extension;
484 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
485 return mpeg_audio_emphasis;
486 case V4L2_CID_MPEG_AUDIO_CRC:
487 return mpeg_audio_crc;
24c19a21
HV		 488 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
489 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
490 return mpeg_audio_dec_playback;
0996517c
HV		 491 case V4L2_CID_MPEG_VIDEO_ENCODING:
492 return mpeg_video_encoding;
493 case V4L2_CID_MPEG_VIDEO_ASPECT:
494 return mpeg_video_aspect;
495 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
496 return mpeg_video_bitrate_mode;
497 case V4L2_CID_MPEG_STREAM_TYPE:
498 return mpeg_stream_type;
499 case V4L2_CID_MPEG_STREAM_VBI_FMT:
500 return mpeg_stream_vbi_fmt;
501 case V4L2_CID_POWER_LINE_FREQUENCY:
502 return camera_power_line_frequency;
503 case V4L2_CID_EXPOSURE_AUTO:
504 return camera_exposure_auto;
cf072139
SN		 505 case V4L2_CID_EXPOSURE_METERING:
506 return camera_exposure_metering;
2272ab65
SN		 507 case V4L2_CID_AUTO_FOCUS_RANGE:
508 return camera_auto_focus_range;
0996517c
HV		 509 case V4L2_CID_COLORFX:
510 return colorfx;
e40a0573
SN		 511 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
512 return auto_n_preset_white_balance;
7f84ad8b
SN		 513 case V4L2_CID_ISO_SENSITIVITY_AUTO:
514 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 515 case V4L2_CID_SCENE_MODE:
516 return scene_mode;
0996517c 517 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 518 return tune_emphasis;
519 case V4L2_CID_TUNE_DEEMPHASIS:
520 return tune_emphasis;
0b159acd
SA		 521 case V4L2_CID_FLASH_LED_MODE:
522 return flash_led_mode;
523 case V4L2_CID_FLASH_STROBE_SOURCE:
524 return flash_strobe_source;
064f5096
KD		 525 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
526 return header_mode;
527 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
528 return multi_slice;
529 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
530 return entropy_mode;
531 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
532 return mpeg_h264_level;
533 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
534 return h264_loop_filter;
535 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
536 return h264_profile;
537 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
538 return vui_sar_idc;
2e81dde9
AK		 539 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
540 return h264_fp_arrangement_type;
541 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
542 return h264_fmo_map_type;
064f5096
KD		 543 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
544 return mpeg_mpeg4_level;
545 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
546 return mpeg4_profile;
bc9028e1
AK		 547 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
548 return vpx_golden_frame_sel;
c7361ae1
SN		 549 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
550 return jpeg_chroma_subsampling;
977ebec7
HV		 551 case V4L2_CID_DV_TX_MODE:
552 return dv_tx_mode;
553 case V4L2_CID_DV_TX_RGB_RANGE:
554 case V4L2_CID_DV_RX_RGB_RANGE:
555 return dv_rgb_range;
c7361ae1 556
0996517c
HV		 557 default:
558 return NULL;
559 }
560}
561EXPORT_SYMBOL(v4l2_ctrl_get_menu);
562
bc9028e1 563#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 564/*
565 * Returns NULL or an s64 type array containing the menu for given
566 * control ID. The total number of the menu items is returned in @len.
567 */
4eed9b33 568const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 569{
4eed9b33 570 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 571 1, 2, 4, 8,
572 };
573
4eed9b33 574 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 575 1, 2, 3,
576 };
577
d1e9b7c1 578 switch (id) {
bc9028e1
AK		 579 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
580 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
581 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
582 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 583 default:
584 *len = 0;
585 return NULL;
2028c71d 586 }
d1e9b7c1
SN		 587}
588EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
589
0996517c
HV		 590/* Return the control name. */
591const char *v4l2_ctrl_get_name(u32 id)
592{
593 switch (id) {
594 /* USER controls */
6c8d6111 595 /* Keep the order of the 'case's the same as in videodev2.h! */
6dd5aff3
MCC		 596 case V4L2_CID_USER_CLASS: return "User Controls";
597 case V4L2_CID_BRIGHTNESS: return "Brightness";
598 case V4L2_CID_CONTRAST: return "Contrast";
599 case V4L2_CID_SATURATION: return "Saturation";
600 case V4L2_CID_HUE: return "Hue";
601 case V4L2_CID_AUDIO_VOLUME: return "Volume";
602 case V4L2_CID_AUDIO_BALANCE: return "Balance";
603 case V4L2_CID_AUDIO_BASS: return "Bass";
604 case V4L2_CID_AUDIO_TREBLE: return "Treble";
605 case V4L2_CID_AUDIO_MUTE: return "Mute";
606 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 607 case V4L2_CID_BLACK_LEVEL: return "Black Level";
608 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
609 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
610 case V4L2_CID_RED_BALANCE: return "Red Balance";
611 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
612 case V4L2_CID_GAMMA: return "Gamma";
613 case V4L2_CID_EXPOSURE: return "Exposure";
614 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
615 case V4L2_CID_GAIN: return "Gain";
616 case V4L2_CID_HFLIP: return "Horizontal Flip";
617 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 618 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
619 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
620 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
621 case V4L2_CID_SHARPNESS: return "Sharpness";
622 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
623 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 624 case V4L2_CID_COLOR_KILLER: return "Color Killer";
625 case V4L2_CID_COLORFX: return "Color Effects";
626 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
627 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
628 case V4L2_CID_ROTATE: return "Rotate";
629 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 630 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 631 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
632 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 633 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
634 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 635 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 636 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 637
bc9028e1
AK		 638 /* Codec controls */
639 /* The MPEG controls are applicable to all codec controls
640 * and the 'MPEG' part of the define is historical */
6c8d6111 641 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 642 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 643 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
644 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
645 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
646 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
647 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 648 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
649 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
650 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 651 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 652 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
653 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
654 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
655 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
656 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 657 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 658 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
659 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
660 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
661 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
662 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 663 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
664 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 665 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
666 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
667 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
668 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
669 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
670 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
671 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
672 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
673 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 674 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 675 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 676 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 677 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
678 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 679 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 680 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
681 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
682 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 683 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 684 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 685 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
686 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 687 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
688 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
689 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 690 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
691 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 692 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
693 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
694 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
695 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 696 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
697 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 698 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
699 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
700 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
701 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
702 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
703 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
704 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
705 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
706 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 707 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
708 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
709 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
710 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
711 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
712 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
713 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
714 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
715 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
716 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
717 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
718 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
719 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
720 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
721 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
722 return "H264 Set QP Value for HC Layers";
064f5096 723 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 724 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
725 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 726 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
727 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
728 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
729 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
730 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 731 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
732 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
733 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 734 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 735 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
736 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 737 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 738 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
739 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 740 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
0996517c 741
bc9028e1
AK		 742 /* VPX controls */
743 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
744 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
745 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
746 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
747 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
748 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
749 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 750 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
751 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
752 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
753 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
bbd8f3fe 754 case V4L2_CID_MPEG_VIDEO_VPX_PROFILE: return "VPX Profile";
bc9028e1 755
0996517c 756 /* CAMERA controls */
6c8d6111 757 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 758 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
759 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
760 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
761 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
762 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
763 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
764 case V4L2_CID_PAN_RESET: return "Pan, Reset";
765 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
766 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
767 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
768 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
769 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 770 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 771 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
772 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
773 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
774 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 775 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
776 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 777 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 778 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 779 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 780 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 781 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
782 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 783 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 784 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 785 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 786 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
787 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
788 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
789 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
0996517c
HV		 790
791 /* FM Radio Modulator control */
6c8d6111 792 /* Keep the order of the 'case's the same as in videodev2.h! */
0996517c
HV		 793 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
794 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
795 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
796 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
797 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
798 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
799 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
800 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
801 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 802 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 803 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
804 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
805 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
806 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
807 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
808 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
809 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 810 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 811 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
812 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
813
0b159acd 814 /* Flash controls */
f08aacf8
HV		 815 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
816 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
817 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 818 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 819 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
820 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
821 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
822 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
823 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
824 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 825 case V4L2_CID_FLASH_FAULT: return "Faults";
826 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 827 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 828
c7361ae1
SN		 829 /* JPEG encoder controls */
830 /* Keep the order of the 'case's the same as in videodev2.h! */
831 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
832 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
833 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
834 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
835 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
836
8c9d236e
SA		 837 /* Image source controls */
838 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
839 case V4L2_CID_VBLANK: return "Vertical Blanking";
840 case V4L2_CID_HBLANK: return "Horizontal Blanking";
841 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
842
c643ee13
SA		 843 /* Image processing controls */
844 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
845 case V4L2_CID_LINK_FREQ: return "Link Frequency";
846 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 847 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
c643ee13 848
977ebec7
HV		 849 /* DV controls */
850 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
851 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
852 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
853 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
854 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
855 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
856 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
857 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
858
aec330a8
AS		 859 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
860 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
861 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad
AP		 862
863 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
864 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
865 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
866 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
867 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
868 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
869 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 870 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
871 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 872 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
0996517c
HV		 873 default:
874 return NULL;
875 }
876}
877EXPORT_SYMBOL(v4l2_ctrl_get_name);
878
879void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 880 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 881{
882 *name = v4l2_ctrl_get_name(id);
883 *flags = 0;
884
885 switch (id) {
886 case V4L2_CID_AUDIO_MUTE:
887 case V4L2_CID_AUDIO_LOUDNESS:
888 case V4L2_CID_AUTO_WHITE_BALANCE:
889 case V4L2_CID_AUTOGAIN:
890 case V4L2_CID_HFLIP:
891 case V4L2_CID_VFLIP:
892 case V4L2_CID_HUE_AUTO:
893 case V4L2_CID_CHROMA_AGC:
894 case V4L2_CID_COLOR_KILLER:
a2f8b84f 895 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 896 case V4L2_CID_MPEG_AUDIO_MUTE:
897 case V4L2_CID_MPEG_VIDEO_MUTE:
898 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
899 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
900 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
901 case V4L2_CID_FOCUS_AUTO:
902 case V4L2_CID_PRIVACY:
903 case V4L2_CID_AUDIO_LIMITER_ENABLED:
904 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
905 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 906 case V4L2_CID_ILLUMINATORS_1:
907 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 908 case V4L2_CID_FLASH_STROBE_STATUS:
909 case V4L2_CID_FLASH_CHARGE:
910 case V4L2_CID_FLASH_READY:
064f5096
KD		 911 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
912 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
913 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
914 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
915 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
916 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
917 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 918 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 919 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 920 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 921 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 922 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
923 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
924 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 925 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 926 case V4L2_CID_RF_TUNER_PLL_LOCK:
0996517c
HV		 927 *type = V4L2_CTRL_TYPE_BOOLEAN;
928 *min = 0;
929 *max = *step = 1;
930 break;
bf0bedd3
AG		 931 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
932 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
933 *type = V4L2_CTRL_TYPE_INTEGER;
934 break;
0996517c
HV		 935 case V4L2_CID_PAN_RESET:
936 case V4L2_CID_TILT_RESET:
0b159acd
SA		 937 case V4L2_CID_FLASH_STROBE:
938 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 939 case V4L2_CID_AUTO_FOCUS_START:
940 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c
HV		 941 *type = V4L2_CTRL_TYPE_BUTTON;
942 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
943 *min = *max = *step = *def = 0;
944 break;
945 case V4L2_CID_POWER_LINE_FREQUENCY:
946 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
947 case V4L2_CID_MPEG_AUDIO_ENCODING:
948 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
949 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
950 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
951 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
952 case V4L2_CID_MPEG_AUDIO_MODE:
953 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
954 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
955 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 956 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
957 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 958 case V4L2_CID_MPEG_VIDEO_ENCODING:
959 case V4L2_CID_MPEG_VIDEO_ASPECT:
960 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
961 case V4L2_CID_MPEG_STREAM_TYPE:
962 case V4L2_CID_MPEG_STREAM_VBI_FMT:
963 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 964 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 965 case V4L2_CID_COLORFX:
e40a0573 966 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 967 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 968 case V4L2_CID_FLASH_LED_MODE:
969 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 970 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
971 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
972 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
973 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
974 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
975 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
976 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 977 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
978 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 979 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
980 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 981 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 982 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 983 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 984 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 985 case V4L2_CID_DV_TX_MODE:
986 case V4L2_CID_DV_TX_RGB_RANGE:
987 case V4L2_CID_DV_RX_RGB_RANGE:
5ebef0fb 988 case V4L2_CID_TEST_PATTERN:
aec330a8 989 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 990 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
0996517c
HV		 991 *type = V4L2_CTRL_TYPE_MENU;
992 break;
c643ee13
SA		 993 case V4L2_CID_LINK_FREQ:
994 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
995 break;
0996517c
HV		 996 case V4L2_CID_RDS_TX_PS_NAME:
997 case V4L2_CID_RDS_TX_RADIO_TEXT:
998 *type = V4L2_CTRL_TYPE_STRING;
999 break;
7f84ad8b 1000 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1001 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1002 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1003 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1004 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1005 break;
0996517c
HV		 1006 case V4L2_CID_USER_CLASS:
1007 case V4L2_CID_CAMERA_CLASS:
1008 case V4L2_CID_MPEG_CLASS:
1009 case V4L2_CID_FM_TX_CLASS:
0b159acd 1010 case V4L2_CID_FLASH_CLASS:
c7361ae1 1011 case V4L2_CID_JPEG_CLASS:
8c9d236e 1012 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1013 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1014 case V4L2_CID_DV_CLASS:
aec330a8 1015 case V4L2_CID_FM_RX_CLASS:
80807fad 1016 case V4L2_CID_RF_TUNER_CLASS:
0996517c
HV		 1017 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1018 /* You can neither read not write these */
1019 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1020 *min = *max = *step = *def = 0;
1021 break;
1022 case V4L2_CID_BG_COLOR:
1023 *type = V4L2_CTRL_TYPE_INTEGER;
1024 *step = 1;
1025 *min = 0;
1026 /* Max is calculated as RGB888 that is 2^24 */
1027 *max = 0xFFFFFF;
1028 break;
0b159acd 1029 case V4L2_CID_FLASH_FAULT:
c7361ae1 1030 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1031 case V4L2_CID_3A_LOCK:
2272ab65 1032 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1033 case V4L2_CID_DV_TX_HOTPLUG:
1034 case V4L2_CID_DV_TX_RXSENSE:
1035 case V4L2_CID_DV_TX_EDID_PRESENT:
1036 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1037 *type = V4L2_CTRL_TYPE_BITMASK;
1038 break;
064f5096
KD		 1039 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1040 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1041 *type = V4L2_CTRL_TYPE_INTEGER;
1042 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1043 break;
24c19a21 1044 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1045 *type = V4L2_CTRL_TYPE_INTEGER64;
1046 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1047 *min = *def = 0;
1048 *max = 0x1ffffffffLL;
1049 *step = 1;
1050 break;
1051 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1052 *type = V4L2_CTRL_TYPE_INTEGER64;
1053 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1054 *min = *def = 0;
1055 *max = 0x7fffffffffffffffLL;
1056 *step = 1;
1057 break;
c643ee13 1058 case V4L2_CID_PIXEL_RATE:
24c19a21 1059 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1060 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1061 break;
0996517c
HV		 1062 default:
1063 *type = V4L2_CTRL_TYPE_INTEGER;
1064 break;
1065 }
1066 switch (id) {
1067 case V4L2_CID_MPEG_AUDIO_ENCODING:
1068 case V4L2_CID_MPEG_AUDIO_MODE:
1069 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1070 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1071 case V4L2_CID_MPEG_STREAM_TYPE:
1072 *flags |= V4L2_CTRL_FLAG_UPDATE;
1073 break;
1074 case V4L2_CID_AUDIO_VOLUME:
1075 case V4L2_CID_AUDIO_BALANCE:
1076 case V4L2_CID_AUDIO_BASS:
1077 case V4L2_CID_AUDIO_TREBLE:
1078 case V4L2_CID_BRIGHTNESS:
1079 case V4L2_CID_CONTRAST:
1080 case V4L2_CID_SATURATION:
1081 case V4L2_CID_HUE:
1082 case V4L2_CID_RED_BALANCE:
1083 case V4L2_CID_BLUE_BALANCE:
1084 case V4L2_CID_GAMMA:
1085 case V4L2_CID_SHARPNESS:
1086 case V4L2_CID_CHROMA_GAIN:
1087 case V4L2_CID_RDS_TX_DEVIATION:
1088 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1089 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1090 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1091 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1092 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1093 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1094 case V4L2_CID_PILOT_TONE_DEVIATION:
1095 case V4L2_CID_PILOT_TONE_FREQUENCY:
1096 case V4L2_CID_TUNE_POWER_LEVEL:
1097 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
80807fad
AP		 1098 case V4L2_CID_RF_TUNER_LNA_GAIN:
1099 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1100 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1101 case V4L2_CID_RF_TUNER_BANDWIDTH:
0996517c
HV		 1102 *flags |= V4L2_CTRL_FLAG_SLIDER;
1103 break;
1104 case V4L2_CID_PAN_RELATIVE:
1105 case V4L2_CID_TILT_RELATIVE:
1106 case V4L2_CID_FOCUS_RELATIVE:
1107 case V4L2_CID_IRIS_RELATIVE:
1108 case V4L2_CID_ZOOM_RELATIVE:
1109 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1110 break;
0b159acd 1111 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1112 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1113 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1114 case V4L2_CID_DV_TX_HOTPLUG:
1115 case V4L2_CID_DV_TX_RXSENSE:
1116 case V4L2_CID_DV_TX_EDID_PRESENT:
1117 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1118 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1119 break;
9aa4357e
AP		 1120 case V4L2_CID_RF_TUNER_PLL_LOCK:
1121 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1122 break;
0996517c
HV		 1123 }
1124}
1125EXPORT_SYMBOL(v4l2_ctrl_fill);
1126
6e239399
HV		 1127static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1128{
1129 memset(ev->reserved, 0, sizeof(ev->reserved));
1130 ev->type = V4L2_EVENT_CTRL;
1131 ev->id = ctrl->id;
1132 ev->u.ctrl.changes = changes;
1133 ev->u.ctrl.type = ctrl->type;
1134 ev->u.ctrl.flags = ctrl->flags;
d9a25471 1135 if (ctrl->is_ptr)
6e239399
HV		 1136 ev->u.ctrl.value64 = 0;
1137 else
1138 ev->u.ctrl.value64 = ctrl->cur.val64;
1139 ev->u.ctrl.minimum = ctrl->minimum;
1140 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1141 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1142 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1143 ev->u.ctrl.step = 1;
1144 else
1145 ev->u.ctrl.step = ctrl->step;
1146 ev->u.ctrl.default_value = ctrl->default_value;
1147}
1148
1149static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1150{
1151 struct v4l2_event ev;
77068d36 1152 struct v4l2_subscribed_event *sev;
6e239399 1153
77068d36 1154 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1155 return;
6e239399
HV		 1156 fill_event(&ev, ctrl, changes);
1157
77068d36 1158 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1159 if (sev->fh != fh ||
1160 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1161 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1162}
1163
0176077a
HV		 1164static bool std_equal(const struct v4l2_ctrl *ctrl,
1165 union v4l2_ctrl_ptr ptr1,
1166 union v4l2_ctrl_ptr ptr2)
1167{
1168 switch (ctrl->type) {
1169 case V4L2_CTRL_TYPE_BUTTON:
1170 return false;
1171 case V4L2_CTRL_TYPE_STRING:
1172 /* strings are always 0-terminated */
1173 return !strcmp(ptr1.p_char, ptr2.p_char);
1174 case V4L2_CTRL_TYPE_INTEGER64:
1175 return *ptr1.p_s64 == *ptr2.p_s64;
1176 default:
1177 if (ctrl->is_ptr)
1178 return !memcmp(ptr1.p, ptr2.p, ctrl->elem_size);
1179 return *ptr1.p_s32 == *ptr2.p_s32;
1180 }
1181}
1182
1183static void std_init(const struct v4l2_ctrl *ctrl,
1184 union v4l2_ctrl_ptr ptr)
1185{
1186 switch (ctrl->type) {
1187 case V4L2_CTRL_TYPE_STRING:
1188 memset(ptr.p_char, ' ', ctrl->minimum);
1189 ptr.p_char[ctrl->minimum] = '\0';
1190 break;
1191 case V4L2_CTRL_TYPE_INTEGER64:
1192 *ptr.p_s64 = ctrl->default_value;
1193 break;
1194 case V4L2_CTRL_TYPE_INTEGER:
1195 case V4L2_CTRL_TYPE_INTEGER_MENU:
1196 case V4L2_CTRL_TYPE_MENU:
1197 case V4L2_CTRL_TYPE_BITMASK:
1198 case V4L2_CTRL_TYPE_BOOLEAN:
1199 *ptr.p_s32 = ctrl->default_value;
1200 break;
1201 default:
1202 break;
1203 }
1204}
1205
1206static void std_log(const struct v4l2_ctrl *ctrl)
1207{
1208 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1209
1210 switch (ctrl->type) {
1211 case V4L2_CTRL_TYPE_INTEGER:
1212 pr_cont("%d", *ptr.p_s32);
1213 break;
1214 case V4L2_CTRL_TYPE_BOOLEAN:
1215 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1216 break;
1217 case V4L2_CTRL_TYPE_MENU:
1218 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1219 break;
1220 case V4L2_CTRL_TYPE_INTEGER_MENU:
1221 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1222 break;
1223 case V4L2_CTRL_TYPE_BITMASK:
1224 pr_cont("0x%08x", *ptr.p_s32);
1225 break;
1226 case V4L2_CTRL_TYPE_INTEGER64:
1227 pr_cont("%lld", *ptr.p_s64);
1228 break;
1229 case V4L2_CTRL_TYPE_STRING:
1230 pr_cont("%s", ptr.p_char);
1231 break;
1232 default:
1233 pr_cont("unknown type %d", ctrl->type);
1234 break;
1235 }
1236}
1237
1238/* Round towards the closest legal value */
1239#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1240({ \
1241 offset_type offset; \
1242 val += (ctrl)->step / 2; \
1243 val = clamp_t(typeof(val), val, \
1244 (ctrl)->minimum, (ctrl)->maximum); \
1245 offset = (val) - (ctrl)->minimum; \
1246 offset = (ctrl)->step * (offset / (ctrl)->step); \
1247 val = (ctrl)->minimum + offset; \
1248 0; \
1249})
1250
1251/* Validate a new control */
1252static int std_validate(const struct v4l2_ctrl *ctrl,
1253 union v4l2_ctrl_ptr ptr)
1254{
1255 size_t len;
1256
1257 switch (ctrl->type) {
1258 case V4L2_CTRL_TYPE_INTEGER:
1259 return ROUND_TO_RANGE(*ptr.p_s32, u32, ctrl);
1260 case V4L2_CTRL_TYPE_INTEGER64:
1261 return ROUND_TO_RANGE(*ptr.p_s64, u64, ctrl);
1262
1263 case V4L2_CTRL_TYPE_BOOLEAN:
1264 *ptr.p_s32 = !!*ptr.p_s32;
1265 return 0;
1266
1267 case V4L2_CTRL_TYPE_MENU:
1268 case V4L2_CTRL_TYPE_INTEGER_MENU:
1269 if (*ptr.p_s32 < ctrl->minimum || *ptr.p_s32 > ctrl->maximum)
1270 return -ERANGE;
1271 if (ctrl->menu_skip_mask & (1 << *ptr.p_s32))
1272 return -EINVAL;
1273 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
1274 ctrl->qmenu[*ptr.p_s32][0] == '\0')
1275 return -EINVAL;
1276 return 0;
1277
1278 case V4L2_CTRL_TYPE_BITMASK:
1279 *ptr.p_s32 &= ctrl->maximum;
1280 return 0;
1281
1282 case V4L2_CTRL_TYPE_BUTTON:
1283 case V4L2_CTRL_TYPE_CTRL_CLASS:
1284 *ptr.p_s32 = 0;
1285 return 0;
1286
1287 case V4L2_CTRL_TYPE_STRING:
1288 len = strlen(ptr.p_char);
1289 if (len < ctrl->minimum)
1290 return -ERANGE;
1291 if ((len - ctrl->minimum) % ctrl->step)
1292 return -ERANGE;
1293 return 0;
1294
1295 default:
1296 return -EINVAL;
1297 }
1298}
1299
1300static const struct v4l2_ctrl_type_ops std_type_ops = {
1301 .equal = std_equal,
1302 .init = std_init,
1303 .log = std_log,
1304 .validate = std_validate,
1305};
1306
0996517c
HV		 1307/* Helper function: copy the current control value back to the caller */
1308static int cur_to_user(struct v4l2_ext_control *c,
1309 struct v4l2_ctrl *ctrl)
1310{
1311 u32 len;
1312
d9a25471
HV		 1313 if (ctrl->is_ptr && !ctrl->is_string)
1314 return copy_to_user(c->ptr, ctrl->cur.p, ctrl->elem_size);
1315
0996517c
HV		 1316 switch (ctrl->type) {
1317 case V4L2_CTRL_TYPE_STRING:
1318 len = strlen(ctrl->cur.string);
1319 if (c->size < len + 1) {
1320 c->size = len + 1;
1321 return -ENOSPC;
1322 }
1323 return copy_to_user(c->string, ctrl->cur.string,
1324 len + 1) ? -EFAULT : 0;
1325 case V4L2_CTRL_TYPE_INTEGER64:
1326 c->value64 = ctrl->cur.val64;
1327 break;
1328 default:
1329 c->value = ctrl->cur.val;
1330 break;
1331 }
1332 return 0;
1333}
1334
1335/* Helper function: copy the caller-provider value as the new control value */
1336static int user_to_new(struct v4l2_ext_control *c,
1337 struct v4l2_ctrl *ctrl)
1338{
1339 int ret;
1340 u32 size;
1341
2a863793 1342 ctrl->is_new = 1;
d9a25471
HV		 1343 if (ctrl->is_ptr && !ctrl->is_string)
1344 return copy_from_user(ctrl->p, c->ptr, ctrl->elem_size);
1345
0996517c
HV		 1346 switch (ctrl->type) {
1347 case V4L2_CTRL_TYPE_INTEGER64:
1348 ctrl->val64 = c->value64;
1349 break;
1350 case V4L2_CTRL_TYPE_STRING:
1351 size = c->size;
1352 if (size == 0)
1353 return -ERANGE;
1354 if (size > ctrl->maximum + 1)
1355 size = ctrl->maximum + 1;
1356 ret = copy_from_user(ctrl->string, c->string, size);
1357 if (!ret) {
1358 char last = ctrl->string[size - 1];
1359
1360 ctrl->string[size - 1] = 0;
1361 /* If the string was longer than ctrl->maximum,
1362 then return an error. */
1363 if (strlen(ctrl->string) == ctrl->maximum && last)
1364 return -ERANGE;
1365 }
1366 return ret ? -EFAULT : 0;
1367 default:
1368 ctrl->val = c->value;
1369 break;
1370 }
1371 return 0;
1372}
1373
1374/* Helper function: copy the new control value back to the caller */
1375static int new_to_user(struct v4l2_ext_control *c,
1376 struct v4l2_ctrl *ctrl)
1377{
1378 u32 len;
1379
d9a25471
HV		 1380 if (ctrl->is_ptr && !ctrl->is_string)
1381 return copy_to_user(c->ptr, ctrl->p, ctrl->elem_size);
1382
0996517c
HV		 1383 switch (ctrl->type) {
1384 case V4L2_CTRL_TYPE_STRING:
1385 len = strlen(ctrl->string);
1386 if (c->size < len + 1) {
1387 c->size = ctrl->maximum + 1;
1388 return -ENOSPC;
1389 }
1390 return copy_to_user(c->string, ctrl->string,
1391 len + 1) ? -EFAULT : 0;
1392 case V4L2_CTRL_TYPE_INTEGER64:
1393 c->value64 = ctrl->val64;
1394 break;
1395 default:
1396 c->value = ctrl->val;
1397 break;
1398 }
1399 return 0;
1400}
1401
1402/* Copy the new value to the current value. */
2ccbe779 1403static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1404{
6e239399
HV		 1405 bool changed = false;
1406
0996517c
HV		 1407 if (ctrl == NULL)
1408 return;
d9a25471 1409
0996517c 1410 switch (ctrl->type) {
6e239399
HV		 1411 case V4L2_CTRL_TYPE_BUTTON:
1412 changed = true;
1413 break;
0996517c
HV		 1414 case V4L2_CTRL_TYPE_STRING:
1415 /* strings are always 0-terminated */
6e239399 1416 changed = strcmp(ctrl->string, ctrl->cur.string);
0996517c
HV		 1417 strcpy(ctrl->cur.string, ctrl->string);
1418 break;
1419 case V4L2_CTRL_TYPE_INTEGER64:
6e239399 1420 changed = ctrl->val64 != ctrl->cur.val64;
0996517c
HV		 1421 ctrl->cur.val64 = ctrl->val64;
1422 break;
1423 default:
d9a25471
HV		 1424 if (ctrl->is_ptr) {
1425 changed = memcmp(ctrl->p, ctrl->cur.p, ctrl->elem_size);
1426 memcpy(ctrl->cur.p, ctrl->p, ctrl->elem_size);
1427 } else {
1428 changed = ctrl->val != ctrl->cur.val;
1429 ctrl->cur.val = ctrl->val;
1430 }
0996517c
HV		 1431 break;
1432 }
2ccbe779
SN		 1433 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1434 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1435 ctrl->flags &=
1436 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1437 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1438 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1439 if (ctrl->cluster[0]->has_volatiles)
1440 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1441 }
1249a3a8 1442 fh = NULL;
72d877ca 1443 }
2ccbe779 1444 if (changed || ch_flags) {
639884a6
HV		 1445 /* If a control was changed that was not one of the controls
1446 modified by the application, then send the event to all. */
1447 if (!ctrl->is_new)
1448 fh = NULL;
6e239399 1449 send_event(fh, ctrl,
2ccbe779 1450 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1451 if (ctrl->call_notify && changed && ctrl->handler->notify)
1452 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1453 }
0996517c
HV		 1454}
1455
1456/* Copy the current value to the new value */
1457static void cur_to_new(struct v4l2_ctrl *ctrl)
1458{
1459 if (ctrl == NULL)
1460 return;
1461 switch (ctrl->type) {
1462 case V4L2_CTRL_TYPE_STRING:
1463 /* strings are always 0-terminated */
1464 strcpy(ctrl->string, ctrl->cur.string);
1465 break;
1466 case V4L2_CTRL_TYPE_INTEGER64:
1467 ctrl->val64 = ctrl->cur.val64;
1468 break;
1469 default:
d9a25471
HV		 1470 if (ctrl->is_ptr)
1471 memcpy(ctrl->p, ctrl->cur.p, ctrl->elem_size);
1472 else
1473 ctrl->val = ctrl->cur.val;
0996517c
HV		 1474 break;
1475 }
1476}
1477
1478/* Return non-zero if one or more of the controls in the cluster has a new
1479 value that differs from the current value. */
1480static int cluster_changed(struct v4l2_ctrl *master)
1481{
1482 int diff = 0;
1483 int i;
1484
1485 for (i = 0; !diff && i < master->ncontrols; i++) {
1486 struct v4l2_ctrl *ctrl = master->cluster[i];
1487
1488 if (ctrl == NULL)
1489 continue;
0176077a 1490 diff = !ctrl->type_ops->equal(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1491 }
1492 return diff;
1493}
1494
2ccbe779
SN		 1495/* Control range checking */
1496static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1497 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1498{
1499 switch (type) {
1500 case V4L2_CTRL_TYPE_BOOLEAN:
1501 if (step != 1 || max > 1 || min < 0)
1502 return -ERANGE;
1503 /* fall through */
1504 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1505 case V4L2_CTRL_TYPE_INTEGER64:
1506 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1507 return -ERANGE;
1508 return 0;
1509 case V4L2_CTRL_TYPE_BITMASK:
1510 if (step || min || !max || (def & ~max))
1511 return -ERANGE;
1512 return 0;
1513 case V4L2_CTRL_TYPE_MENU:
1514 case V4L2_CTRL_TYPE_INTEGER_MENU:
1515 if (min > max || def < min || def > max)
1516 return -ERANGE;
1517 /* Note: step == menu_skip_mask for menu controls.
1518 So here we check if the default value is masked out. */
1519 if (step && ((1 << def) & step))
1520 return -EINVAL;
1521 return 0;
1522 case V4L2_CTRL_TYPE_STRING:
1523 if (min > max || min < 0 || step < 1 || def)
1524 return -ERANGE;
1525 return 0;
1526 default:
1527 return 0;
1528 }
1529}
1530
03d5285b
LP		 1531/* Validate a new control */
1532static int validate_new(const struct v4l2_ctrl *ctrl,
1533 struct v4l2_ext_control *c)
0996517c 1534{
0176077a 1535 union v4l2_ctrl_ptr ptr;
0996517c
HV		 1536
1537 switch (ctrl->type) {
1538 case V4L2_CTRL_TYPE_INTEGER:
ce580fe5 1539 case V4L2_CTRL_TYPE_INTEGER_MENU:
0176077a 1540 case V4L2_CTRL_TYPE_MENU:
fa4d7096 1541 case V4L2_CTRL_TYPE_BITMASK:
0176077a 1542 case V4L2_CTRL_TYPE_BOOLEAN:
0996517c
HV		 1543 case V4L2_CTRL_TYPE_BUTTON:
1544 case V4L2_CTRL_TYPE_CTRL_CLASS:
0176077a
HV		 1545 ptr.p_s32 = &c->value;
1546 return ctrl->type_ops->validate(ctrl, ptr);
0996517c 1547
0176077a
HV		 1548 case V4L2_CTRL_TYPE_INTEGER64:
1549 ptr.p_s64 = &c->value64;
1550 return ctrl->type_ops->validate(ctrl, ptr);
0996517c
HV		 1551
1552 default:
0176077a
HV		 1553 ptr.p = c->ptr;
1554 return ctrl->type_ops->validate(ctrl, ptr);
0996517c
HV		 1555 }
1556}
1557
1558static inline u32 node2id(struct list_head *node)
1559{
1560 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1561}
1562
1563/* Set the handler's error code if it wasn't set earlier already */
1564static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1565{
1566 if (hdl->error == 0)
1567 hdl->error = err;
1568 return err;
1569}
1570
1571/* Initialize the handler */
6cd247ef
AW		 1572int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1573 unsigned nr_of_controls_hint,
1574 struct lock_class_key *key, const char *name)
0996517c 1575{
77e7c4e6
SA		 1576 hdl->lock = &hdl->_lock;
1577 mutex_init(hdl->lock);
6cd247ef 1578 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1579 INIT_LIST_HEAD(&hdl->ctrls);
1580 INIT_LIST_HEAD(&hdl->ctrl_refs);
1581 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1582 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1583 GFP_KERNEL);
0996517c
HV		 1584 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1585 return hdl->error;
1586}
6cd247ef 1587EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1588
1589/* Free all controls and control refs */
1590void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1591{
1592 struct v4l2_ctrl_ref *ref, *next_ref;
1593 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1594 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1595
1596 if (hdl == NULL || hdl->buckets == NULL)
1597 return;
1598
77e7c4e6 1599 mutex_lock(hdl->lock);
0996517c
HV		 1600 /* Free all nodes */
1601 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1602 list_del(&ref->node);
1603 kfree(ref);
1604 }
1605 /* Free all controls owned by the handler */
1606 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1607 list_del(&ctrl->node);
77068d36
HV		 1608 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1609 list_del(&sev->node);
0996517c
HV		 1610 kfree(ctrl);
1611 }
1612 kfree(hdl->buckets);
1613 hdl->buckets = NULL;
1614 hdl->cached = NULL;
1615 hdl->error = 0;
77e7c4e6 1616 mutex_unlock(hdl->lock);
0996517c
HV		 1617}
1618EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1619
1620/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1621 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1622 with applications that do not use the NEXT_CTRL flag.
1623
1624 We just find the n-th private user control. It's O(N), but that should not
1625 be an issue in this particular case. */
1626static struct v4l2_ctrl_ref *find_private_ref(
1627 struct v4l2_ctrl_handler *hdl, u32 id)
1628{
1629 struct v4l2_ctrl_ref *ref;
1630
1631 id -= V4L2_CID_PRIVATE_BASE;
1632 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1633 /* Search for private user controls that are compatible with
1634 VIDIOC_G/S_CTRL. */
1635 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1636 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1637 if (!ref->ctrl->is_int)
0996517c
HV		 1638 continue;
1639 if (id == 0)
1640 return ref;
1641 id--;
1642 }
1643 }
1644 return NULL;
1645}
1646
1647/* Find a control with the given ID. */
1648static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1649{
1650 struct v4l2_ctrl_ref *ref;
1651 int bucket;
1652
1653 id &= V4L2_CTRL_ID_MASK;
1654
1655 /* Old-style private controls need special handling */
1656 if (id >= V4L2_CID_PRIVATE_BASE)
1657 return find_private_ref(hdl, id);
1658 bucket = id % hdl->nr_of_buckets;
1659
1660 /* Simple optimization: cache the last control found */
1661 if (hdl->cached && hdl->cached->ctrl->id == id)
1662 return hdl->cached;
1663
1664 /* Not in cache, search the hash */
1665 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1666 while (ref && ref->ctrl->id != id)
1667 ref = ref->next;
1668
1669 if (ref)
1670 hdl->cached = ref; /* cache it! */
1671 return ref;
1672}
1673
1674/* Find a control with the given ID. Take the handler's lock first. */
1675static struct v4l2_ctrl_ref *find_ref_lock(
1676 struct v4l2_ctrl_handler *hdl, u32 id)
1677{
1678 struct v4l2_ctrl_ref *ref = NULL;
1679
1680 if (hdl) {
77e7c4e6 1681 mutex_lock(hdl->lock);
0996517c 1682 ref = find_ref(hdl, id);
77e7c4e6 1683 mutex_unlock(hdl->lock);
0996517c
HV		 1684 }
1685 return ref;
1686}
1687
1688/* Find a control with the given ID. */
1689struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1690{
1691 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1692
1693 return ref ? ref->ctrl : NULL;
1694}
1695EXPORT_SYMBOL(v4l2_ctrl_find);
1696
1697/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1698static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1699 struct v4l2_ctrl *ctrl)
1700{
1701 struct v4l2_ctrl_ref *ref;
1702 struct v4l2_ctrl_ref *new_ref;
1703 u32 id = ctrl->id;
1704 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1705 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1706
d9a25471
HV		 1707 /*
1708 * Automatically add the control class if it is not yet present and
1709 * the new control is not a compound control.
1710 */
1711 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1712 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1713 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1714 return hdl->error;
1715
1716 if (hdl->error)
1717 return hdl->error;
1718
1719 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1720 if (!new_ref)
1721 return handler_set_err(hdl, -ENOMEM);
1722 new_ref->ctrl = ctrl;
1723 if (ctrl->handler == hdl) {
1724 /* By default each control starts in a cluster of its own.
1725 new_ref->ctrl is basically a cluster array with one
1726 element, so that's perfect to use as the cluster pointer.
1727 But only do this for the handler that owns the control. */
1728 ctrl->cluster = &new_ref->ctrl;
1729 ctrl->ncontrols = 1;
1730 }
1731
1732 INIT_LIST_HEAD(&new_ref->node);
1733
77e7c4e6 1734 mutex_lock(hdl->lock);
0996517c
HV		 1735
1736 /* Add immediately at the end of the list if the list is empty, or if
1737 the last element in the list has a lower ID.
1738 This ensures that when elements are added in ascending order the
1739 insertion is an O(1) operation. */
1740 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1741 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1742 goto insert_in_hash;
1743 }
1744
1745 /* Find insert position in sorted list */
1746 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1747 if (ref->ctrl->id < id)
1748 continue;
1749 /* Don't add duplicates */
1750 if (ref->ctrl->id == id) {
1751 kfree(new_ref);
1752 goto unlock;
1753 }
1754 list_add(&new_ref->node, ref->node.prev);
1755 break;
1756 }
1757
1758insert_in_hash:
1759 /* Insert the control node in the hash */
1760 new_ref->next = hdl->buckets[bucket];
1761 hdl->buckets[bucket] = new_ref;
1762
1763unlock:
77e7c4e6 1764 mutex_unlock(hdl->lock);
0996517c
HV		 1765 return 0;
1766}
1767
1768/* Add a new control */
1769static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1770 const struct v4l2_ctrl_ops *ops,
0176077a 1771 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1772 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1773 s64 min, s64 max, u64 step, s64 def,
d9a25471 1774 u32 elem_size,
ce580fe5
SA		 1775 u32 flags, const char * const *qmenu,
1776 const s64 *qmenu_int, void *priv)
0996517c
HV		 1777{
1778 struct v4l2_ctrl *ctrl;
d9a25471
HV		 1779 unsigned sz_extra;
1780 void *data;
2ccbe779 1781 int err;
0996517c
HV		 1782
1783 if (hdl->error)
1784 return NULL;
1785
d9a25471
HV		 1786 if (type == V4L2_CTRL_TYPE_INTEGER64)
1787 elem_size = sizeof(s64);
1788 else if (type == V4L2_CTRL_TYPE_STRING)
1789 elem_size = max + 1;
1790 else if (type < V4L2_CTRL_COMPOUND_TYPES)
1791 elem_size = sizeof(s32);
1792
0996517c
HV		 1793 /* Sanity checks */
1794 if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
d9a25471 1795 elem_size == 0 ||
0996517c 1796 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1797 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1798 handler_set_err(hdl, -ERANGE);
1799 return NULL;
1800 }
2ccbe779
SN		 1801 err = check_range(type, min, max, step, def);
1802 if (err) {
1803 handler_set_err(hdl, err);
02ac0480
HV		 1804 return NULL;
1805 }
fa4d7096
HV		 1806 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1807 handler_set_err(hdl, -ERANGE);
1808 return NULL;
1809 }
0996517c 1810
d9a25471 1811 sz_extra = 0;
0996517c
HV		 1812 if (type == V4L2_CTRL_TYPE_BUTTON)
1813 flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1814 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1815 flags |= V4L2_CTRL_FLAG_READ_ONLY;
d9a25471
HV		 1816 else if (type == V4L2_CTRL_TYPE_STRING || type >= V4L2_CTRL_COMPOUND_TYPES)
1817 sz_extra += 2 * elem_size;
0996517c
HV		 1818
1819 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1820 if (ctrl == NULL) {
1821 handler_set_err(hdl, -ENOMEM);
1822 return NULL;
1823 }
1824
1825 INIT_LIST_HEAD(&ctrl->node);
77068d36 1826 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1827 ctrl->handler = hdl;
1828 ctrl->ops = ops;
0176077a 1829 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 1830 ctrl->id = id;
1831 ctrl->name = name;
1832 ctrl->type = type;
1833 ctrl->flags = flags;
1834 ctrl->minimum = min;
1835 ctrl->maximum = max;
1836 ctrl->step = step;
d9a25471
HV		 1837 ctrl->default_value = def;
1838 ctrl->is_string = type == V4L2_CTRL_TYPE_STRING;
1839 ctrl->is_ptr = type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
1840 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
1841 ctrl->elem_size = elem_size;
ce580fe5
SA		 1842 if (type == V4L2_CTRL_TYPE_MENU)
1843 ctrl->qmenu = qmenu;
1844 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1845 ctrl->qmenu_int = qmenu_int;
0996517c 1846 ctrl->priv = priv;
d9a25471
HV		 1847 ctrl->cur.val = ctrl->val = def;
1848 data = &ctrl->cur + 1;
1849
0176077a
HV		 1850 if (ctrl->is_ptr) {
1851 ctrl->p = ctrl->p_new.p = data;
1852 ctrl->p_cur.p = data + elem_size;
1853 } else {
1854 ctrl->p_new.p = &ctrl->val;
1855 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 1856 }
0176077a
HV		 1857 ctrl->type_ops->init(ctrl, ctrl->p_cur);
1858 ctrl->type_ops->init(ctrl, ctrl->p_new);
1859
0996517c
HV		 1860 if (handler_new_ref(hdl, ctrl)) {
1861 kfree(ctrl);
1862 return NULL;
1863 }
77e7c4e6 1864 mutex_lock(hdl->lock);
0996517c 1865 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 1866 mutex_unlock(hdl->lock);
0996517c
HV		 1867 return ctrl;
1868}
1869
1870struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
1871 const struct v4l2_ctrl_config *cfg, void *priv)
1872{
1873 bool is_menu;
1874 struct v4l2_ctrl *ctrl;
1875 const char *name = cfg->name;
513521ea 1876 const char * const *qmenu = cfg->qmenu;
ce580fe5 1877 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 1878 enum v4l2_ctrl_type type = cfg->type;
1879 u32 flags = cfg->flags;
0ba2aeb6
HV		 1880 s64 min = cfg->min;
1881 s64 max = cfg->max;
1882 u64 step = cfg->step;
1883 s64 def = cfg->def;
0996517c
HV		 1884
1885 if (name == NULL)
1886 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
1887 &def, &flags);
1888
ce580fe5
SA		 1889 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
1890 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 1891 if (is_menu)
1892 WARN_ON(step);
1893 else
1894 WARN_ON(cfg->menu_skip_mask);
ce580fe5 1895 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 1896 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 1897 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
1898 qmenu_int == NULL) {
1899 handler_set_err(hdl, -EINVAL);
1900 return NULL;
1901 }
0996517c 1902
0176077a 1903 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c
HV		 1904 type, min, max,
1905 is_menu ? cfg->menu_skip_mask : step,
d9a25471
HV		 1906 def, cfg->elem_size,
1907 flags, qmenu, qmenu_int, priv);
88365105 1908 if (ctrl)
0996517c 1909 ctrl->is_private = cfg->is_private;
0996517c
HV		 1910 return ctrl;
1911}
1912EXPORT_SYMBOL(v4l2_ctrl_new_custom);
1913
1914/* Helper function for standard non-menu controls */
1915struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
1916 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 1917 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 1918{
1919 const char *name;
1920 enum v4l2_ctrl_type type;
1921 u32 flags;
1922
1923 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 1924 if (type == V4L2_CTRL_TYPE_MENU ||
1925 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
1926 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 1927 handler_set_err(hdl, -EINVAL);
1928 return NULL;
1929 }
0176077a 1930 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
d9a25471
HV		 1931 min, max, step, def, 0,
1932 flags, NULL, NULL, NULL);
0996517c
HV		 1933}
1934EXPORT_SYMBOL(v4l2_ctrl_new_std);
1935
1936/* Helper function for standard menu controls */
1937struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
1938 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 1939 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 1940{
d1e9b7c1
SN		 1941 const char * const *qmenu = NULL;
1942 const s64 *qmenu_int = NULL;
fbbb29a6 1943 unsigned int qmenu_int_len = 0;
0996517c
HV		 1944 const char *name;
1945 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 1946 s64 min;
1947 s64 max = _max;
1948 s64 def = _def;
1949 u64 step;
0996517c
HV		 1950 u32 flags;
1951
1952 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 1953
1954 if (type == V4L2_CTRL_TYPE_MENU)
1955 qmenu = v4l2_ctrl_get_menu(id);
1956 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1957 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
1958
1959 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 1960 handler_set_err(hdl, -EINVAL);
1961 return NULL;
1962 }
0176077a 1963 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
d9a25471
HV		 1964 0, max, mask, def, 0,
1965 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 1966}
1967EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
1968
117a711a
LP		 1969/* Helper function for standard menu controls with driver defined menu */
1970struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 1971 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
1972 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 1973{
1974 enum v4l2_ctrl_type type;
1975 const char *name;
1976 u32 flags;
0ba2aeb6
HV		 1977 u64 step;
1978 s64 min;
1979 s64 max = _max;
1980 s64 def = _def;
117a711a
LP		 1981
1982 /* v4l2_ctrl_new_std_menu_items() should only be called for
1983 * standard controls without a standard menu.
1984 */
1985 if (v4l2_ctrl_get_menu(id)) {
1986 handler_set_err(hdl, -EINVAL);
1987 return NULL;
1988 }
1989
1990 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
1991 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
1992 handler_set_err(hdl, -EINVAL);
1993 return NULL;
1994 }
0176077a
HV		 1995 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
1996 0, max, mask, def,
d9a25471 1997 0, flags, qmenu, NULL, NULL);
117a711a
LP		 1998
1999}
2000EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2001
515f3287
SN		 2002/* Helper function for standard integer menu controls */
2003struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2004 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2005 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2006{
2007 const char *name;
2008 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2009 s64 min;
2010 u64 step;
2011 s64 max = _max;
2012 s64 def = _def;
515f3287
SN		 2013 u32 flags;
2014
2015 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2016 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2017 handler_set_err(hdl, -EINVAL);
2018 return NULL;
2019 }
0176077a 2020 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
d9a25471
HV		 2021 0, max, 0, def, 0,
2022 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2023}
2024EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2025
0996517c
HV		 2026/* Add a control from another handler to this handler */
2027struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
2028 struct v4l2_ctrl *ctrl)
2029{
2030 if (hdl == NULL || hdl->error)
2031 return NULL;
2032 if (ctrl == NULL) {
2033 handler_set_err(hdl, -EINVAL);
2034 return NULL;
2035 }
2036 if (ctrl->handler == hdl)
2037 return ctrl;
2038 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
2039}
2040EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
2041
2042/* Add the controls from another handler to our own. */
2043int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2044 struct v4l2_ctrl_handler *add,
2045 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2046{
072e6602 2047 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2048 int ret = 0;
2049
2050 /* Do nothing if either handler is NULL or if they are the same */
2051 if (!hdl || !add || hdl == add)
2052 return 0;
2053 if (hdl->error)
2054 return hdl->error;
77e7c4e6 2055 mutex_lock(add->lock);
072e6602
HV		 2056 list_for_each_entry(ref, &add->ctrl_refs, node) {
2057 struct v4l2_ctrl *ctrl = ref->ctrl;
2058
0996517c
HV		 2059 /* Skip handler-private controls. */
2060 if (ctrl->is_private)
2061 continue;
6e239399
HV		 2062 /* And control classes */
2063 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2064 continue;
34a6b7d0
HV		 2065 /* Filter any unwanted controls */
2066 if (filter && !filter(ctrl))
2067 continue;
0996517c
HV		 2068 ret = handler_new_ref(hdl, ctrl);
2069 if (ret)
2070 break;
2071 }
77e7c4e6 2072 mutex_unlock(add->lock);
0996517c
HV		 2073 return ret;
2074}
2075EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2076
34a6b7d0
HV		 2077bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2078{
2079 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
2080 return true;
3963d4fb
HV		 2081 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
2082 return true;
34a6b7d0
HV		 2083 switch (ctrl->id) {
2084 case V4L2_CID_AUDIO_MUTE:
2085 case V4L2_CID_AUDIO_VOLUME:
2086 case V4L2_CID_AUDIO_BALANCE:
2087 case V4L2_CID_AUDIO_BASS:
2088 case V4L2_CID_AUDIO_TREBLE:
2089 case V4L2_CID_AUDIO_LOUDNESS:
2090 return true;
2091 default:
2092 break;
2093 }
2094 return false;
2095}
2096EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2097
0996517c
HV		 2098/* Cluster controls */
2099void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2100{
5626b8c7 2101 bool has_volatiles = false;
0996517c
HV		 2102 int i;
2103
2104 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2105 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2106 return;
0996517c
HV		 2107
2108 for (i = 0; i < ncontrols; i++) {
2109 if (controls[i]) {
2110 controls[i]->cluster = controls;
2111 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2112 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2113 has_volatiles = true;
0996517c
HV		 2114 }
2115 }
5626b8c7 2116 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2117}
2118EXPORT_SYMBOL(v4l2_ctrl_cluster);
2119
72d877ca
HV		 2120void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2121 u8 manual_val, bool set_volatile)
2122{
2123 struct v4l2_ctrl *master = controls[0];
5626b8c7 2124 u32 flag = 0;
72d877ca
HV		 2125 int i;
2126
2127 v4l2_ctrl_cluster(ncontrols, controls);
2128 WARN_ON(ncontrols <= 1);
82a7c049 2129 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2130 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2131 master->is_auto = true;
5626b8c7 2132 master->has_volatiles = set_volatile;
72d877ca
HV		 2133 master->manual_mode_value = manual_val;
2134 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2135
2136 if (!is_cur_manual(master))
2137 flag = V4L2_CTRL_FLAG_INACTIVE |
2138 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2139
2140 for (i = 1; i < ncontrols; i++)
88365105 2141 if (controls[i])
72d877ca 2142 controls[i]->flags |= flag;
72d877ca
HV		 2143}
2144EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2145
0996517c
HV		 2146/* Activate/deactivate a control. */
2147void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2148{
6e239399
HV		 2149 /* invert since the actual flag is called 'inactive' */
2150 bool inactive = !active;
2151 bool old;
2152
0996517c
HV		 2153 if (ctrl == NULL)
2154 return;
2155
6e239399 2156 if (inactive)
0996517c 2157 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2158 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2159 else
2160 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2161 old = test_and_clear_bit(4, &ctrl->flags);
2162 if (old != inactive)
2163 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2164}
2165EXPORT_SYMBOL(v4l2_ctrl_activate);
2166
2167/* Grab/ungrab a control.
2168 Typically used when streaming starts and you want to grab controls,
2169 preventing the user from changing them.
2170
2171 Just call this and the framework will block any attempts to change
2172 these controls. */
2173void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2174{
6e239399
HV		 2175 bool old;
2176
0996517c
HV		 2177 if (ctrl == NULL)
2178 return;
2179
6e239399 2180 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2181 if (grabbed)
2182 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2183 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2184 else
2185 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2186 old = test_and_clear_bit(1, &ctrl->flags);
2187 if (old != grabbed)
2188 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2189 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2190}
2191EXPORT_SYMBOL(v4l2_ctrl_grab);
2192
2193/* Log the control name and value */
2194static void log_ctrl(const struct v4l2_ctrl *ctrl,
2195 const char *prefix, const char *colon)
2196{
0996517c
HV		 2197 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2198 return;
2199 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2200 return;
2201
7eafbce9 2202 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2203
0176077a
HV		 2204 ctrl->type_ops->log(ctrl);
2205
88365105
HV		 2206 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2207 V4L2_CTRL_FLAG_GRABBED |
2208 V4L2_CTRL_FLAG_VOLATILE)) {
2209 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2210 pr_cont(" inactive");
88365105 2211 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2212 pr_cont(" grabbed");
88365105 2213 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2214 pr_cont(" volatile");
88365105 2215 }
7eafbce9 2216 pr_cont("\n");
0996517c
HV		 2217}
2218
2219/* Log all controls owned by the handler */
2220void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2221 const char *prefix)
2222{
2223 struct v4l2_ctrl *ctrl;
2224 const char *colon = "";
2225 int len;
2226
2227 if (hdl == NULL)
2228 return;
2229 if (prefix == NULL)
2230 prefix = "";
2231 len = strlen(prefix);
2232 if (len && prefix[len - 1] != ' ')
2233 colon = ": ";
77e7c4e6 2234 mutex_lock(hdl->lock);
0996517c
HV		 2235 list_for_each_entry(ctrl, &hdl->ctrls, node)
2236 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2237 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2238 mutex_unlock(hdl->lock);
0996517c
HV		 2239}
2240EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2241
ffa9b9f0
SN		 2242int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2243{
2244 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2245 return 0;
2246}
2247EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2248
0996517c
HV		 2249/* Call s_ctrl for all controls owned by the handler */
2250int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2251{
2252 struct v4l2_ctrl *ctrl;
2253 int ret = 0;
2254
2255 if (hdl == NULL)
2256 return 0;
77e7c4e6 2257 mutex_lock(hdl->lock);
0996517c
HV		 2258 list_for_each_entry(ctrl, &hdl->ctrls, node)
2259 ctrl->done = false;
2260
2261 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2262 struct v4l2_ctrl *master = ctrl->cluster[0];
2263 int i;
2264
2265 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2266 /* Skip button controls and read-only controls. */
2267 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2268 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2269 continue;
2270
2a863793
HV		 2271 for (i = 0; i < master->ncontrols; i++) {
2272 if (master->cluster[i]) {
2273 cur_to_new(master->cluster[i]);
2274 master->cluster[i]->is_new = 1;
71c6c4c9 2275 master->cluster[i]->done = true;
2a863793
HV		 2276 }
2277 }
54c911eb 2278 ret = call_op(master, s_ctrl);
0996517c
HV		 2279 if (ret)
2280 break;
0996517c 2281 }
77e7c4e6 2282 mutex_unlock(hdl->lock);
0996517c
HV		 2283 return ret;
2284}
2285EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2286
d9a25471
HV		 2287/* Implement VIDIOC_QUERY_EXT_CTRL */
2288int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2289{
d9a25471 2290 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2291 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2292 struct v4l2_ctrl_ref *ref;
2293 struct v4l2_ctrl *ctrl;
2294
2295 if (hdl == NULL)
2296 return -EINVAL;
2297
77e7c4e6 2298 mutex_lock(hdl->lock);
0996517c
HV		 2299
2300 /* Try to find it */
2301 ref = find_ref(hdl, id);
2302
d9a25471
HV		 2303 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2304 bool is_compound;
2305 /* Match any control that is not hidden */
2306 unsigned mask = 1;
2307 bool match = false;
2308
2309 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2310 /* Match any hidden control */
2311 match = true;
2312 } else if ((qc->id & next_flags) == next_flags) {
2313 /* Match any control, compound or not */
2314 mask = 0;
2315 }
2316
0996517c
HV		 2317 /* Find the next control with ID > qc->id */
2318
2319 /* Did we reach the end of the control list? */
2320 if (id >= node2id(hdl->ctrl_refs.prev)) {
2321 ref = NULL; /* Yes, so there is no next control */
2322 } else if (ref) {
2323 /* We found a control with the given ID, so just get
d9a25471
HV		 2324 the next valid one in the list. */
2325 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
2326 is_compound =
2327 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2328 if (id < ref->ctrl->id &&
2329 (is_compound & mask) == match)
2330 break;
2331 }
2332 if (&ref->node == &hdl->ctrl_refs)
2333 ref = NULL;
0996517c
HV		 2334 } else {
2335 /* No control with the given ID exists, so start
2336 searching for the next largest ID. We know there
2337 is one, otherwise the first 'if' above would have
2338 been true. */
d9a25471
HV		 2339 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2340 is_compound =
2341 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2342 if (id < ref->ctrl->id &&
2343 (is_compound & mask) == match)
0996517c 2344 break;
d9a25471
HV		 2345 }
2346 if (&ref->node == &hdl->ctrl_refs)
2347 ref = NULL;
0996517c
HV		 2348 }
2349 }
77e7c4e6 2350 mutex_unlock(hdl->lock);
d9a25471 2351
0996517c
HV		 2352 if (!ref)
2353 return -EINVAL;
2354
2355 ctrl = ref->ctrl;
2356 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2357 if (id >= V4L2_CID_PRIVATE_BASE)
2358 qc->id = id;
2359 else
2360 qc->id = ctrl->id;
0996517c 2361 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
d9a25471
HV		 2362 qc->flags = ctrl->flags;
2363 qc->type = ctrl->type;
2364 if (ctrl->is_ptr)
2365 qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
2366 qc->elem_size = ctrl->elem_size;
2367 qc->elems = 1;
0996517c
HV		 2368 qc->minimum = ctrl->minimum;
2369 qc->maximum = ctrl->maximum;
2370 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2371 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2372 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2373 qc->step = 1;
2374 else
2375 qc->step = ctrl->step;
d9a25471
HV		 2376 return 0;
2377}
2378EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2379
2380/* Implement VIDIOC_QUERYCTRL */
2381int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2382{
2383 struct v4l2_query_ext_ctrl qec = { qc->id };
2384 int rc;
2385
2386 rc = v4l2_query_ext_ctrl(hdl, &qec);
2387 if (rc)
2388 return rc;
2389
2390 qc->id = qec.id;
2391 qc->type = qec.type;
2392 qc->flags = qec.flags;
2393 strlcpy(qc->name, qec.name, sizeof(qc->name));
2394 switch (qc->type) {
2395 case V4L2_CTRL_TYPE_INTEGER:
2396 case V4L2_CTRL_TYPE_BOOLEAN:
2397 case V4L2_CTRL_TYPE_MENU:
2398 case V4L2_CTRL_TYPE_INTEGER_MENU:
2399 case V4L2_CTRL_TYPE_STRING:
2400 case V4L2_CTRL_TYPE_BITMASK:
2401 qc->minimum = qec.minimum;
2402 qc->maximum = qec.maximum;
2403 qc->step = qec.step;
2404 qc->default_value = qec.default_value;
2405 break;
2406 default:
2407 qc->minimum = 0;
2408 qc->maximum = 0;
2409 qc->step = 0;
2410 qc->default_value = 0;
2411 break;
2412 }
0996517c
HV		 2413 return 0;
2414}
2415EXPORT_SYMBOL(v4l2_queryctrl);
2416
2417int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2418{
d9a25471 2419 if (qc->id & (V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND))
87a0c94c 2420 return -EINVAL;
0996517c
HV		 2421 return v4l2_queryctrl(sd->ctrl_handler, qc);
2422}
2423EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2424
2425/* Implement VIDIOC_QUERYMENU */
2426int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2427{
2428 struct v4l2_ctrl *ctrl;
2429 u32 i = qm->index;
2430
2431 ctrl = v4l2_ctrl_find(hdl, qm->id);
2432 if (!ctrl)
2433 return -EINVAL;
2434
2435 qm->reserved = 0;
2436 /* Sanity checks */
ce580fe5
SA		 2437 switch (ctrl->type) {
2438 case V4L2_CTRL_TYPE_MENU:
2439 if (ctrl->qmenu == NULL)
2440 return -EINVAL;
2441 break;
2442 case V4L2_CTRL_TYPE_INTEGER_MENU:
2443 if (ctrl->qmenu_int == NULL)
2444 return -EINVAL;
2445 break;
2446 default:
2447 return -EINVAL;
2448 }
2449
2450 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2451 return -EINVAL;
ce580fe5 2452
0996517c
HV		 2453 /* Use mask to see if this menu item should be skipped */
2454 if (ctrl->menu_skip_mask & (1 << i))
2455 return -EINVAL;
2456 /* Empty menu items should also be skipped */
ce580fe5
SA		 2457 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2458 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2459 return -EINVAL;
2460 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2461 } else {
2462 qm->value = ctrl->qmenu_int[i];
2463 }
0996517c
HV		 2464 return 0;
2465}
2466EXPORT_SYMBOL(v4l2_querymenu);
2467
2468int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2469{
2470 return v4l2_querymenu(sd->ctrl_handler, qm);
2471}
2472EXPORT_SYMBOL(v4l2_subdev_querymenu);
2473
2474
2475
2476/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2477
2478 It is not a fully atomic operation, just best-effort only. After all, if
2479 multiple controls have to be set through multiple i2c writes (for example)
2480 then some initial writes may succeed while others fail. Thus leaving the
2481 system in an inconsistent state. The question is how much effort you are
2482 willing to spend on trying to make something atomic that really isn't.
2483
2484 From the point of view of an application the main requirement is that
2485 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2486 error should be returned without actually affecting any controls.
2487
2488 If all the values are correct, then it is acceptable to just give up
2489 in case of low-level errors.
2490
2491 It is important though that the application can tell when only a partial
2492 configuration was done. The way we do that is through the error_idx field
2493 of struct v4l2_ext_controls: if that is equal to the count field then no
2494 controls were affected. Otherwise all controls before that index were
2495 successful in performing their 'get' or 'set' operation, the control at
2496 the given index failed, and you don't know what happened with the controls
2497 after the failed one. Since if they were part of a control cluster they
2498 could have been successfully processed (if a cluster member was encountered
2499 at index < error_idx), they could have failed (if a cluster member was at
2500 error_idx), or they may not have been processed yet (if the first cluster
2501 member appeared after error_idx).
2502
2503 It is all fairly theoretical, though. In practice all you can do is to
2504 bail out. If error_idx == count, then it is an application bug. If
2505 error_idx < count then it is only an application bug if the error code was
2506 EBUSY. That usually means that something started streaming just when you
2507 tried to set the controls. In all other cases it is a driver/hardware
2508 problem and all you can do is to retry or bail out.
2509
2510 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2511 never modifies controls the error_idx is just set to whatever control
2512 has an invalid value.
2513 */
2514
2515/* Prepare for the extended g/s/try functions.
2516 Find the controls in the control array and do some basic checks. */
2517static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2518 struct v4l2_ext_controls *cs,
d9a25471
HV		 2519 struct v4l2_ctrl_helper *helpers,
2520 bool get)
0996517c 2521{
eb5b16ef
HV		 2522 struct v4l2_ctrl_helper *h;
2523 bool have_clusters = false;
0996517c
HV		 2524 u32 i;
2525
eb5b16ef 2526 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2527 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2528 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2529 struct v4l2_ctrl *ctrl;
2530 u32 id = c->id & V4L2_CTRL_ID_MASK;
2531
37cd3b73 2532 cs->error_idx = i;
0996517c
HV		 2533
2534 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2535 return -EINVAL;
2536
2537 /* Old-style private controls are not allowed for
2538 extended controls */
2539 if (id >= V4L2_CID_PRIVATE_BASE)
2540 return -EINVAL;
eb5b16ef
HV		 2541 ref = find_ref_lock(hdl, id);
2542 if (ref == NULL)
0996517c 2543 return -EINVAL;
eb5b16ef 2544 ctrl = ref->ctrl;
0996517c
HV		 2545 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2546 return -EINVAL;
2547
eb5b16ef
HV		 2548 if (ctrl->cluster[0]->ncontrols > 1)
2549 have_clusters = true;
2550 if (ctrl->cluster[0] != ctrl)
2551 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
d9a25471
HV		 2552 if (ctrl->is_ptr && !ctrl->is_string && c->size < ctrl->elem_size) {
2553 if (get) {
2554 c->size = ctrl->elem_size;
2555 return -ENOSPC;
2556 }
2557 return -EFAULT;
2558 }
eb5b16ef
HV		 2559 /* Store the ref to the master control of the cluster */
2560 h->mref = ref;
2561 h->ctrl = ctrl;
2562 /* Initially set next to 0, meaning that there is no other
2563 control in this helper array belonging to the same
2564 cluster */
2565 h->next = 0;
0996517c 2566 }
0996517c 2567
eb5b16ef
HV		 2568 /* We are done if there were no controls that belong to a multi-
2569 control cluster. */
2570 if (!have_clusters)
2571 return 0;
0996517c 2572
eb5b16ef
HV		 2573 /* The code below figures out in O(n) time which controls in the list
2574 belong to the same cluster. */
0996517c 2575
eb5b16ef 2576 /* This has to be done with the handler lock taken. */
77e7c4e6 2577 mutex_lock(hdl->lock);
0996517c 2578
eb5b16ef
HV		 2579 /* First zero the helper field in the master control references */
2580 for (i = 0; i < cs->count; i++)
c082266f 2581 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2582 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2583 struct v4l2_ctrl_ref *mref = h->mref;
2584
2585 /* If the mref->helper is set, then it points to an earlier
2586 helper that belongs to the same cluster. */
2587 if (mref->helper) {
2588 /* Set the next field of mref->helper to the current
2589 index: this means that that earlier helper now
2590 points to the next helper in the same cluster. */
2591 mref->helper->next = i;
2592 /* mref should be set only for the first helper in the
2593 cluster, clear the others. */
2594 h->mref = NULL;
2595 }
2596 /* Point the mref helper to the current helper struct. */
2597 mref->helper = h;
0996517c 2598 }
77e7c4e6 2599 mutex_unlock(hdl->lock);
eb5b16ef 2600 return 0;
0996517c
HV		 2601}
2602
2603/* Handles the corner case where cs->count == 0. It checks whether the
2604 specified control class exists. If that class ID is 0, then it checks
2605 whether there are any controls at all. */
2606static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2607{
2608 if (ctrl_class == 0)
2609 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2610 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2611}
2612
2613
2614
2615/* Get extended controls. Allocates the helpers array if needed. */
2616int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2617{
eb5b16ef
HV		 2618 struct v4l2_ctrl_helper helper[4];
2619 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2620 int ret;
ddac5c10 2621 int i, j;
0996517c
HV		 2622
2623 cs->error_idx = cs->count;
2624 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2625
2626 if (hdl == NULL)
2627 return -EINVAL;
2628
2629 if (cs->count == 0)
2630 return class_check(hdl, cs->ctrl_class);
2631
2632 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2633 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2634 GFP_KERNEL);
0996517c
HV		 2635 if (helpers == NULL)
2636 return -ENOMEM;
2637 }
2638
d9a25471 2639 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2640 cs->error_idx = cs->count;
0996517c
HV		 2641
2642 for (i = 0; !ret && i < cs->count; i++)
2643 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2644 ret = -EACCES;
2645
2646 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2647 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2648 struct v4l2_ctrl *ctrl) = cur_to_user;
2649 struct v4l2_ctrl *master;
0996517c 2650
eb5b16ef 2651 if (helpers[i].mref == NULL)
0996517c
HV		 2652 continue;
2653
eb5b16ef 2654 master = helpers[i].mref->ctrl;
0996517c
HV		 2655 cs->error_idx = i;
2656
2657 v4l2_ctrl_lock(master);
ddac5c10
HV		 2658
2659 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2660 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2661 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2662 for (j = 0; j < master->ncontrols; j++)
2663 cur_to_new(master->cluster[j]);
54c911eb 2664 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2665 ctrl_to_user = new_to_user;
ddac5c10
HV		 2666 }
2667 /* If OK, then copy the current (for non-volatile controls)
2668 or the new (for volatile controls) control values to the
2669 caller */
eb5b16ef
HV		 2670 if (!ret) {
2671 u32 idx = i;
2672
2673 do {
2674 ret = ctrl_to_user(cs->controls + idx,
2675 helpers[idx].ctrl);
2676 idx = helpers[idx].next;
2677 } while (!ret && idx);
2678 }
0996517c 2679 v4l2_ctrl_unlock(master);
0996517c
HV		 2680 }
2681
2682 if (cs->count > ARRAY_SIZE(helper))
2683 kfree(helpers);
2684 return ret;
2685}
2686EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2687
2688int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2689{
2690 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2691}
2692EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2693
2694/* Helper function to get a single control */
03d5285b 2695static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2696{
2697 struct v4l2_ctrl *master = ctrl->cluster[0];
2698 int ret = 0;
ddac5c10 2699 int i;
0996517c 2700
d9a25471 2701 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2702 * cur_to_user() calls below would need to be modified not to access
2703 * userspace memory when called from get_ctrl().
2704 */
d9a25471 2705 if (!ctrl->is_int)
03d5285b
LP		 2706 return -EINVAL;
2707
0996517c
HV		 2708 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2709 return -EACCES;
2710
2711 v4l2_ctrl_lock(master);
2712 /* g_volatile_ctrl will update the current control values */
5626b8c7 2713 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2714 for (i = 0; i < master->ncontrols; i++)
2715 cur_to_new(master->cluster[i]);
54c911eb 2716 ret = call_op(master, g_volatile_ctrl);
03d5285b 2717 new_to_user(c, ctrl);
ddac5c10 2718 } else {
03d5285b 2719 cur_to_user(c, ctrl);
ddac5c10 2720 }
0996517c
HV		 2721 v4l2_ctrl_unlock(master);
2722 return ret;
2723}
2724
2725int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2726{
2727 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2728 struct v4l2_ext_control c;
2729 int ret;
0996517c 2730
d9a25471 2731 if (ctrl == NULL || !ctrl->is_int)
0996517c 2732 return -EINVAL;
03d5285b
LP		 2733 ret = get_ctrl(ctrl, &c);
2734 control->value = c.value;
2735 return ret;
0996517c
HV		 2736}
2737EXPORT_SYMBOL(v4l2_g_ctrl);
2738
2739int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2740{
2741 return v4l2_g_ctrl(sd->ctrl_handler, control);
2742}
2743EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2744
2745s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2746{
03d5285b 2747 struct v4l2_ext_control c;
0996517c
HV		 2748
2749 /* It's a driver bug if this happens. */
d9a25471 2750 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2751 c.value = 0;
2752 get_ctrl(ctrl, &c);
2753 return c.value;
0996517c
HV		 2754}
2755EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2756
03d5285b
LP		 2757s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2758{
2759 struct v4l2_ext_control c;
2760
2761 /* It's a driver bug if this happens. */
2762 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
2763 c.value = 0;
2764 get_ctrl(ctrl, &c);
2765 return c.value;
2766}
2767EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2768
0996517c
HV		 2769
2770/* Core function that calls try/s_ctrl and ensures that the new value is
2771 copied to the current value on a set.
2772 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2773static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2774 bool set, u32 ch_flags)
0996517c 2775{
72d877ca 2776 bool update_flag;
eb5b16ef 2777 int ret;
0996517c
HV		 2778 int i;
2779
2780 /* Go through the cluster and either validate the new value or
2781 (if no new value was set), copy the current value to the new
2782 value, ensuring a consistent view for the control ops when
2783 called. */
eb5b16ef 2784 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2785 struct v4l2_ctrl *ctrl = master->cluster[i];
2786
2787 if (ctrl == NULL)
2788 continue;
2789
eb5b16ef
HV		 2790 if (!ctrl->is_new) {
2791 cur_to_new(ctrl);
0996517c
HV		 2792 continue;
2793 }
eb5b16ef
HV		 2794 /* Check again: it may have changed since the
2795 previous check in try_or_set_ext_ctrls(). */
2796 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2797 return -EBUSY;
0996517c
HV		 2798 }
2799
eb5b16ef 2800 ret = call_op(master, try_ctrl);
0996517c
HV		 2801
2802 /* Don't set if there is no change */
72d877ca
HV		 2803 if (ret || !set || !cluster_changed(master))
2804 return ret;
2805 ret = call_op(master, s_ctrl);
72d877ca
HV		 2806 if (ret)
2807 return ret;
2808
eb5b16ef 2809 /* If OK, then make the new values permanent. */
72d877ca
HV		 2810 update_flag = is_cur_manual(master) != is_new_manual(master);
2811 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 2812 new_to_cur(fh, master->cluster[i], ch_flags |
2813 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 2814 return 0;
0996517c
HV		 2815}
2816
e6402585
HV		 2817/* Validate controls. */
2818static int validate_ctrls(struct v4l2_ext_controls *cs,
2819 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 2820{
e6402585 2821 unsigned i;
0996517c
HV		 2822 int ret = 0;
2823
eb5b16ef 2824 cs->error_idx = cs->count;
0996517c
HV		 2825 for (i = 0; i < cs->count; i++) {
2826 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
2827
e6402585 2828 cs->error_idx = i;
0996517c
HV		 2829
2830 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2831 return -EACCES;
2832 /* This test is also done in try_set_control_cluster() which
2833 is called in atomic context, so that has the final say,
2834 but it makes sense to do an up-front check as well. Once
2835 an error occurs in try_set_control_cluster() some other
2836 controls may have been set already and we want to do a
2837 best-effort to avoid that. */
2838 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2839 return -EBUSY;
eb5b16ef
HV		 2840 ret = validate_new(ctrl, &cs->controls[i]);
2841 if (ret)
2842 return ret;
0996517c 2843 }
e6402585
HV		 2844 return 0;
2845}
2846
5626b8c7
HV		 2847/* Obtain the current volatile values of an autocluster and mark them
2848 as new. */
2849static void update_from_auto_cluster(struct v4l2_ctrl *master)
2850{
2851 int i;
2852
2853 for (i = 0; i < master->ncontrols; i++)
2854 cur_to_new(master->cluster[i]);
2855 if (!call_op(master, g_volatile_ctrl))
2856 for (i = 1; i < master->ncontrols; i++)
2857 if (master->cluster[i])
2858 master->cluster[i]->is_new = 1;
2859}
2860
e6402585
HV		 2861/* Try or try-and-set controls */
2862static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2863 struct v4l2_ext_controls *cs,
2864 bool set)
2865{
2866 struct v4l2_ctrl_helper helper[4];
2867 struct v4l2_ctrl_helper *helpers = helper;
2868 unsigned i, j;
2869 int ret;
2870
2871 cs->error_idx = cs->count;
2872 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2873
2874 if (hdl == NULL)
2875 return -EINVAL;
2876
2877 if (cs->count == 0)
2878 return class_check(hdl, cs->ctrl_class);
0996517c 2879
e6402585 2880 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 2881 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2882 GFP_KERNEL);
e6402585
HV		 2883 if (!helpers)
2884 return -ENOMEM;
2885 }
d9a25471 2886 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 2887 if (!ret)
2888 ret = validate_ctrls(cs, helpers, set);
2889 if (ret && set)
2890 cs->error_idx = cs->count;
0996517c 2891 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2892 struct v4l2_ctrl *master;
2893 u32 idx = i;
0996517c 2894
eb5b16ef 2895 if (helpers[i].mref == NULL)
0996517c
HV		 2896 continue;
2897
37cd3b73 2898 cs->error_idx = i;
eb5b16ef
HV		 2899 master = helpers[i].mref->ctrl;
2900 v4l2_ctrl_lock(master);
0996517c 2901
2a863793 2902 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2903 for (j = 0; j < master->ncontrols; j++)
2904 if (master->cluster[j])
2a863793 2905 master->cluster[j]->is_new = 0;
0996517c 2906
5626b8c7
HV		 2907 /* For volatile autoclusters that are currently in auto mode
2908 we need to discover if it will be set to manual mode.
2909 If so, then we have to copy the current volatile values
2910 first since those will become the new manual values (which
2911 may be overwritten by explicit new values from this set
2912 of controls). */
2913 if (master->is_auto && master->has_volatiles &&
2914 !is_cur_manual(master)) {
2915 /* Pick an initial non-manual value */
2916 s32 new_auto_val = master->manual_mode_value + 1;
2917 u32 tmp_idx = idx;
2918
2919 do {
2920 /* Check if the auto control is part of the
2921 list, and remember the new value. */
2922 if (helpers[tmp_idx].ctrl == master)
2923 new_auto_val = cs->controls[tmp_idx].value;
2924 tmp_idx = helpers[tmp_idx].next;
2925 } while (tmp_idx);
2926 /* If the new value == the manual value, then copy
2927 the current volatile values. */
2928 if (new_auto_val == master->manual_mode_value)
2929 update_from_auto_cluster(master);
2930 }
2931
0996517c 2932 /* Copy the new caller-supplied control values.
2a863793 2933 user_to_new() sets 'is_new' to 1. */
eb5b16ef
HV		 2934 do {
2935 ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
2936 idx = helpers[idx].next;
2937 } while (!ret && idx);
0996517c
HV		 2938
2939 if (!ret)
2ccbe779 2940 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 2941
2942 /* Copy the new values back to userspace. */
eb5b16ef
HV		 2943 if (!ret) {
2944 idx = i;
2945 do {
adf41b9b 2946 ret = new_to_user(cs->controls + idx,
e6402585 2947 helpers[idx].ctrl);
eb5b16ef
HV		 2948 idx = helpers[idx].next;
2949 } while (!ret && idx);
2950 }
2951 v4l2_ctrl_unlock(master);
0996517c 2952 }
0996517c 2953
0996517c
HV		 2954 if (cs->count > ARRAY_SIZE(helper))
2955 kfree(helpers);
2956 return ret;
2957}
2958
2959int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2960{
ab892bac 2961 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 2962}
2963EXPORT_SYMBOL(v4l2_try_ext_ctrls);
2964
ab892bac
HV		 2965int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2966 struct v4l2_ext_controls *cs)
0996517c 2967{
ab892bac 2968 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 2969}
2970EXPORT_SYMBOL(v4l2_s_ext_ctrls);
2971
2972int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2973{
ab892bac 2974 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 2975}
2976EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
2977
2978int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2979{
ab892bac 2980 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 2981}
2982EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
2983
2984/* Helper function for VIDIOC_S_CTRL compatibility */
03d5285b 2985static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
2ccbe779 2986 struct v4l2_ext_control *c, u32 ch_flags)
0996517c
HV		 2987{
2988 struct v4l2_ctrl *master = ctrl->cluster[0];
0996517c
HV		 2989 int i;
2990
d9a25471 2991 /* Compound controls are not supported. The user_to_new() and
03d5285b
LP		 2992 * cur_to_user() calls below would need to be modified not to access
2993 * userspace memory when called from set_ctrl().
2994 */
d9a25471 2995 if (ctrl->is_ptr)
03d5285b
LP		 2996 return -EINVAL;
2997
2a863793 2998 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2999 for (i = 0; i < master->ncontrols; i++)
3000 if (master->cluster[i])
2a863793 3001 master->cluster[i]->is_new = 0;
0996517c 3002
5626b8c7
HV		 3003 /* For autoclusters with volatiles that are switched from auto to
3004 manual mode we have to update the current volatile values since
3005 those will become the initial manual values after such a switch. */
3006 if (master->is_auto && master->has_volatiles && ctrl == master &&
03d5285b 3007 !is_cur_manual(master) && c->value == master->manual_mode_value)
5626b8c7 3008 update_from_auto_cluster(master);
03d5285b
LP		 3009
3010 user_to_new(c, ctrl);
2ccbe779
SN		 3011 return try_or_set_cluster(fh, master, true, ch_flags);
3012}
03d5285b 3013
2ccbe779
SN		 3014/* Helper function for VIDIOC_S_CTRL compatibility */
3015static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3016 struct v4l2_ext_control *c)
3017{
3018 int ret = validate_new(ctrl, c);
3019
3020 if (!ret) {
3021 v4l2_ctrl_lock(ctrl);
3022 ret = set_ctrl(fh, ctrl, c, 0);
3023 if (!ret)
3024 cur_to_user(c, ctrl);
3025 v4l2_ctrl_unlock(ctrl);
3026 }
0996517c
HV		 3027 return ret;
3028}
3029
ab892bac
HV		 3030int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3031 struct v4l2_control *control)
0996517c
HV		 3032{
3033 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 3034 struct v4l2_ext_control c;
3035 int ret;
0996517c 3036
d9a25471 3037 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3038 return -EINVAL;
3039
7ebbc39f
HV		 3040 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3041 return -EACCES;
3042
03d5285b 3043 c.value = control->value;
2ccbe779 3044 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3045 control->value = c.value;
3046 return ret;
0996517c
HV		 3047}
3048EXPORT_SYMBOL(v4l2_s_ctrl);
3049
3050int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
3051{
ab892bac 3052 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 3053}
3054EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
3055
3056int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
3057{
03d5285b
LP		 3058 struct v4l2_ext_control c;
3059
0996517c 3060 /* It's a driver bug if this happens. */
d9a25471 3061 WARN_ON(!ctrl->is_int);
03d5285b 3062 c.value = val;
2ccbe779 3063 return set_ctrl_lock(NULL, ctrl, &c);
0996517c
HV		 3064}
3065EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
6e239399 3066
03d5285b
LP		 3067int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
3068{
3069 struct v4l2_ext_control c;
3070
3071 /* It's a driver bug if this happens. */
3072 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
3073 c.value64 = val;
2ccbe779 3074 return set_ctrl_lock(NULL, ctrl, &c);
03d5285b
LP		 3075}
3076EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64);
3077
8ac7a949
HV		 3078void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3079{
3080 if (ctrl == NULL)
3081 return;
3082 if (notify == NULL) {
3083 ctrl->call_notify = 0;
3084 return;
3085 }
3086 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3087 return;
3088 ctrl->handler->notify = notify;
3089 ctrl->handler->notify_priv = priv;
3090 ctrl->call_notify = 1;
3091}
3092EXPORT_SYMBOL(v4l2_ctrl_notify);
3093
2ccbe779 3094int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3095 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 3096{
3097 int ret = check_range(ctrl->type, min, max, step, def);
3098 struct v4l2_ext_control c;
3099
3100 switch (ctrl->type) {
3101 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3102 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3103 case V4L2_CTRL_TYPE_BOOLEAN:
3104 case V4L2_CTRL_TYPE_MENU:
3105 case V4L2_CTRL_TYPE_INTEGER_MENU:
3106 case V4L2_CTRL_TYPE_BITMASK:
3107 if (ret)
3108 return ret;
3109 break;
3110 default:
3111 return -EINVAL;
3112 }
3113 v4l2_ctrl_lock(ctrl);
3114 ctrl->minimum = min;
3115 ctrl->maximum = max;
3116 ctrl->step = step;
3117 ctrl->default_value = def;
3118 c.value = ctrl->cur.val;
3119 if (validate_new(ctrl, &c))
3120 c.value = def;
3121 if (c.value != ctrl->cur.val)
3122 ret = set_ctrl(NULL, ctrl, &c, V4L2_EVENT_CTRL_CH_RANGE);
3123 else
3124 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
3125 v4l2_ctrl_unlock(ctrl);
3126 return ret;
3127}
3128EXPORT_SYMBOL(v4l2_ctrl_modify_range);
3129
6e6d76cd 3130static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3131{
3e366149
HG		 3132 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3133
3134 if (ctrl == NULL)
3135 return -EINVAL;
3136
6e239399 3137 v4l2_ctrl_lock(ctrl);
77068d36 3138 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3139 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3140 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3141 struct v4l2_event ev;
c12fcfd6 3142 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3143
c12fcfd6
HV		 3144 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3145 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3146 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3147 /* Mark the queue as active, allowing this initial
3148 event to be accepted. */
3149 sev->elems = elems;
77068d36 3150 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3151 }
3152 v4l2_ctrl_unlock(ctrl);
3e366149 3153 return 0;
6e239399 3154}
6e239399 3155
3e366149 3156static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3157{
3e366149
HG		 3158 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3159
6e239399 3160 v4l2_ctrl_lock(ctrl);
77068d36 3161 list_del(&sev->node);
6e239399
HV		 3162 v4l2_ctrl_unlock(ctrl);
3163}
3e366149
HG		 3164
3165void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3166{
3167 u32 old_changes = old->u.ctrl.changes;
3168
3169 old->u.ctrl = new->u.ctrl;
3170 old->u.ctrl.changes |= old_changes;
3171}
3172EXPORT_SYMBOL(v4l2_ctrl_replace);
3173
3174void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3175{
3176 new->u.ctrl.changes |= old->u.ctrl.changes;
3177}
3178EXPORT_SYMBOL(v4l2_ctrl_merge);
3179
3180const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3181 .add = v4l2_ctrl_add_event,
3182 .del = v4l2_ctrl_del_event,
3183 .replace = v4l2_ctrl_replace,
3184 .merge = v4l2_ctrl_merge,
3185};
3186EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3187
3188int v4l2_ctrl_log_status(struct file *file, void *fh)
3189{
3190 struct video_device *vfd = video_devdata(file);
3191 struct v4l2_fh *vfh = file->private_data;
3192
3193 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3194 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3195 vfd->v4l2_dev->name);
3196 return 0;
3197}
3198EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3199
3200int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3201 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3202{
3203 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3204 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3205 return -EINVAL;
3206}
3207EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3208
22fa4279
SN		 3209int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3210 struct v4l2_event_subscription *sub)
3211{
3212 if (!sd->ctrl_handler)
3213 return -EINVAL;
3214 return v4l2_ctrl_subscribe_event(fh, sub);
3215}
3216EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3217
a26243b0
HV		 3218unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
3219{
3220 struct v4l2_fh *fh = file->private_data;
3221
3222 if (v4l2_event_pending(fh))
3223 return POLLPRI;
3224 poll_wait(file, &fh->wait, wait);
3225 return 0;
3226}
3227EXPORT_SYMBOL(v4l2_ctrl_poll);
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