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[media] v4l2-ctrls: add array support
[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
2a9ec373 1138 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 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
998e7659 1164static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 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:
265c7f8a 1172 idx *= ctrl->elem_size;
0176077a 1173 /* strings are always 0-terminated */
265c7f8a 1174 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1175 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1176 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
0176077a 1177 default:
265c7f8a
HV		 1178 if (ctrl->is_int)
1179 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1180 idx *= ctrl->elem_size;
1181 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1182 }
1183}
1184
998e7659 1185static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1186 union v4l2_ctrl_ptr ptr)
1187{
1188 switch (ctrl->type) {
1189 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1190 idx *= ctrl->elem_size;
1191 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1192 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1193 break;
1194 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1195 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1196 break;
1197 case V4L2_CTRL_TYPE_INTEGER:
1198 case V4L2_CTRL_TYPE_INTEGER_MENU:
1199 case V4L2_CTRL_TYPE_MENU:
1200 case V4L2_CTRL_TYPE_BITMASK:
1201 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1202 ptr.p_s32[idx] = ctrl->default_value;
0176077a
HV		 1203 break;
1204 default:
302ab7ce
HV		 1205 idx *= ctrl->elem_size;
1206 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1207 break;
1208 }
1209}
1210
1211static void std_log(const struct v4l2_ctrl *ctrl)
1212{
1213 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1214
998e7659
HV		 1215 if (ctrl->is_array) {
1216 unsigned i;
1217
1218 for (i = 0; i < ctrl->nr_of_dims; i++)
1219 pr_cont("[%u]", ctrl->dims[i]);
1220 pr_cont(" ");
1221 }
1222
0176077a
HV		 1223 switch (ctrl->type) {
1224 case V4L2_CTRL_TYPE_INTEGER:
1225 pr_cont("%d", *ptr.p_s32);
1226 break;
1227 case V4L2_CTRL_TYPE_BOOLEAN:
1228 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1229 break;
1230 case V4L2_CTRL_TYPE_MENU:
1231 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1232 break;
1233 case V4L2_CTRL_TYPE_INTEGER_MENU:
1234 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1235 break;
1236 case V4L2_CTRL_TYPE_BITMASK:
1237 pr_cont("0x%08x", *ptr.p_s32);
1238 break;
1239 case V4L2_CTRL_TYPE_INTEGER64:
1240 pr_cont("%lld", *ptr.p_s64);
1241 break;
1242 case V4L2_CTRL_TYPE_STRING:
1243 pr_cont("%s", ptr.p_char);
1244 break;
1245 default:
1246 pr_cont("unknown type %d", ctrl->type);
1247 break;
1248 }
1249}
1250
1251/* Round towards the closest legal value */
1252#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1253({ \
1254 offset_type offset; \
1255 val += (ctrl)->step / 2; \
1256 val = clamp_t(typeof(val), val, \
1257 (ctrl)->minimum, (ctrl)->maximum); \
1258 offset = (val) - (ctrl)->minimum; \
1259 offset = (ctrl)->step * (offset / (ctrl)->step); \
1260 val = (ctrl)->minimum + offset; \
1261 0; \
1262})
1263
1264/* Validate a new control */
998e7659 1265static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1266 union v4l2_ctrl_ptr ptr)
1267{
1268 size_t len;
1269
1270 switch (ctrl->type) {
1271 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1272 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1273 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1274 return ROUND_TO_RANGE(ptr.p_s64[idx], u64, ctrl);
0176077a
HV		 1275
1276 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1277 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1278 return 0;
1279
1280 case V4L2_CTRL_TYPE_MENU:
1281 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1282 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1283 return -ERANGE;
265c7f8a 1284 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1285 return -EINVAL;
1286 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1287 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1288 return -EINVAL;
1289 return 0;
1290
1291 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1292 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1293 return 0;
1294
1295 case V4L2_CTRL_TYPE_BUTTON:
1296 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1297 ptr.p_s32[idx] = 0;
0176077a
HV		 1298 return 0;
1299
1300 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1301 idx *= ctrl->elem_size;
1302 len = strlen(ptr.p_char + idx);
0176077a
HV		 1303 if (len < ctrl->minimum)
1304 return -ERANGE;
1305 if ((len - ctrl->minimum) % ctrl->step)
1306 return -ERANGE;
1307 return 0;
1308
1309 default:
1310 return -EINVAL;
1311 }
1312}
1313
1314static const struct v4l2_ctrl_type_ops std_type_ops = {
1315 .equal = std_equal,
1316 .init = std_init,
1317 .log = std_log,
1318 .validate = std_validate,
1319};
1320
000e4f9a
HV		 1321/* Helper function: copy the given control value back to the caller */
1322static int ptr_to_user(struct v4l2_ext_control *c,
1323 struct v4l2_ctrl *ctrl,
1324 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1325{
1326 u32 len;
1327
d9a25471 1328 if (ctrl->is_ptr && !ctrl->is_string)
302ab7ce 1329 return copy_to_user(c->ptr, ptr.p, c->size);
d9a25471 1330
0996517c
HV		 1331 switch (ctrl->type) {
1332 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1333 len = strlen(ptr.p_char);
0996517c
HV		 1334 if (c->size < len + 1) {
1335 c->size = len + 1;
1336 return -ENOSPC;
1337 }
000e4f9a
HV		 1338 return copy_to_user(c->string, ptr.p_char, len + 1) ?
1339 -EFAULT : 0;
0996517c 1340 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1341 c->value64 = *ptr.p_s64;
0996517c
HV		 1342 break;
1343 default:
000e4f9a 1344 c->value = *ptr.p_s32;
0996517c
HV		 1345 break;
1346 }
1347 return 0;
1348}
1349
000e4f9a
HV		 1350/* Helper function: copy the current control value back to the caller */
1351static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1352 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1353{
1354 return ptr_to_user(c, ctrl, ctrl->p_cur);
1355}
1356
1357/* Helper function: copy the new control value back to the caller */
1358static int new_to_user(struct v4l2_ext_control *c,
1359 struct v4l2_ctrl *ctrl)
1360{
1361 return ptr_to_user(c, ctrl, ctrl->p_new);
1362}
1363
1364/* Helper function: copy the caller-provider value to the given control value */
1365static int user_to_ptr(struct v4l2_ext_control *c,
1366 struct v4l2_ctrl *ctrl,
1367 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1368{
1369 int ret;
1370 u32 size;
1371
2a863793 1372 ctrl->is_new = 1;
302ab7ce
HV		 1373 if (ctrl->is_ptr && !ctrl->is_string) {
1374 unsigned idx;
1375
1376 ret = copy_from_user(ptr.p, c->ptr, c->size);
1377 if (ret || !ctrl->is_array)
1378 return ret;
1379 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1380 ctrl->type_ops->init(ctrl, idx, ptr);
1381 return 0;
1382 }
d9a25471 1383
0996517c
HV		 1384 switch (ctrl->type) {
1385 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1386 *ptr.p_s64 = c->value64;
0996517c
HV		 1387 break;
1388 case V4L2_CTRL_TYPE_STRING:
1389 size = c->size;
1390 if (size == 0)
1391 return -ERANGE;
1392 if (size > ctrl->maximum + 1)
1393 size = ctrl->maximum + 1;
000e4f9a 1394 ret = copy_from_user(ptr.p_char, c->string, size);
0996517c 1395 if (!ret) {
000e4f9a 1396 char last = ptr.p_char[size - 1];
0996517c 1397
000e4f9a 1398 ptr.p_char[size - 1] = 0;
0996517c
HV		 1399 /* If the string was longer than ctrl->maximum,
1400 then return an error. */
000e4f9a 1401 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1402 return -ERANGE;
1403 }
1404 return ret ? -EFAULT : 0;
1405 default:
000e4f9a 1406 *ptr.p_s32 = c->value;
0996517c
HV		 1407 break;
1408 }
1409 return 0;
1410}
1411
000e4f9a
HV		 1412/* Helper function: copy the caller-provider value as the new control value */
1413static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1414 struct v4l2_ctrl *ctrl)
1415{
000e4f9a
HV		 1416 return user_to_ptr(c, ctrl, ctrl->p_new);
1417}
d9a25471 1418
000e4f9a
HV		 1419/* Copy the one value to another. */
1420static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1421 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1422{
1423 if (ctrl == NULL)
1424 return;
302ab7ce 1425 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1426}
1427
1428/* Copy the new value to the current value. */
2ccbe779 1429static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1430{
000e4f9a 1431 bool changed;
6e239399 1432
0996517c
HV		 1433 if (ctrl == NULL)
1434 return;
9ea1b7a4
HV		 1435
1436 /* has_changed is set by cluster_changed */
1437 changed = ctrl->has_changed;
1438 if (changed)
1439 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1440
2ccbe779
SN		 1441 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1442 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1443 ctrl->flags &=
1444 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1445 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1446 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1447 if (ctrl->cluster[0]->has_volatiles)
1448 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1449 }
1249a3a8 1450 fh = NULL;
72d877ca 1451 }
2ccbe779 1452 if (changed || ch_flags) {
639884a6
HV		 1453 /* If a control was changed that was not one of the controls
1454 modified by the application, then send the event to all. */
1455 if (!ctrl->is_new)
1456 fh = NULL;
6e239399 1457 send_event(fh, ctrl,
2ccbe779 1458 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1459 if (ctrl->call_notify && changed && ctrl->handler->notify)
1460 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1461 }
0996517c
HV		 1462}
1463
1464/* Copy the current value to the new value */
1465static void cur_to_new(struct v4l2_ctrl *ctrl)
1466{
1467 if (ctrl == NULL)
1468 return;
000e4f9a 1469 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1470}
1471
1472/* Return non-zero if one or more of the controls in the cluster has a new
1473 value that differs from the current value. */
1474static int cluster_changed(struct v4l2_ctrl *master)
1475{
9ea1b7a4 1476 bool changed = false;
302ab7ce 1477 unsigned idx;
0996517c
HV		 1478 int i;
1479
9ea1b7a4 1480 for (i = 0; i < master->ncontrols; i++) {
0996517c 1481 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1482 bool ctrl_changed = false;
0996517c
HV		 1483
1484 if (ctrl == NULL)
1485 continue;
302ab7ce
HV		 1486 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1487 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1488 ctrl->p_cur, ctrl->p_new);
302ab7ce 1489 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1490 changed |= ctrl->has_changed;
0996517c 1491 }
9ea1b7a4 1492 return changed;
0996517c
HV		 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;
302ab7ce
HV		 1536 unsigned idx;
1537 int err = 0;
1538
1539 if (!ctrl->is_ptr) {
1540 switch (ctrl->type) {
1541 case V4L2_CTRL_TYPE_INTEGER:
1542 case V4L2_CTRL_TYPE_INTEGER_MENU:
1543 case V4L2_CTRL_TYPE_MENU:
1544 case V4L2_CTRL_TYPE_BITMASK:
1545 case V4L2_CTRL_TYPE_BOOLEAN:
1546 case V4L2_CTRL_TYPE_BUTTON:
1547 case V4L2_CTRL_TYPE_CTRL_CLASS:
1548 ptr.p_s32 = &c->value;
1549 return ctrl->type_ops->validate(ctrl, 0, ptr);
1550
1551 case V4L2_CTRL_TYPE_INTEGER64:
1552 ptr.p_s64 = &c->value64;
1553 return ctrl->type_ops->validate(ctrl, 0, ptr);
1554 default:
1555 break;
1556 }
0996517c 1557 }
302ab7ce
HV		 1558 ptr.p = c->ptr;
1559 for (idx = 0; !err && idx < c->size / ctrl->elem_size; idx++)
1560 err = ctrl->type_ops->validate(ctrl, idx, ptr);
1561 return err;
0996517c
HV		 1562}
1563
1564static inline u32 node2id(struct list_head *node)
1565{
1566 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1567}
1568
1569/* Set the handler's error code if it wasn't set earlier already */
1570static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1571{
1572 if (hdl->error == 0)
1573 hdl->error = err;
1574 return err;
1575}
1576
1577/* Initialize the handler */
6cd247ef
AW		 1578int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1579 unsigned nr_of_controls_hint,
1580 struct lock_class_key *key, const char *name)
0996517c 1581{
77e7c4e6
SA		 1582 hdl->lock = &hdl->_lock;
1583 mutex_init(hdl->lock);
6cd247ef 1584 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1585 INIT_LIST_HEAD(&hdl->ctrls);
1586 INIT_LIST_HEAD(&hdl->ctrl_refs);
1587 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1588 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1589 GFP_KERNEL);
0996517c
HV		 1590 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1591 return hdl->error;
1592}
6cd247ef 1593EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1594
1595/* Free all controls and control refs */
1596void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1597{
1598 struct v4l2_ctrl_ref *ref, *next_ref;
1599 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1600 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1601
1602 if (hdl == NULL || hdl->buckets == NULL)
1603 return;
1604
77e7c4e6 1605 mutex_lock(hdl->lock);
0996517c
HV		 1606 /* Free all nodes */
1607 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1608 list_del(&ref->node);
1609 kfree(ref);
1610 }
1611 /* Free all controls owned by the handler */
1612 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1613 list_del(&ctrl->node);
77068d36
HV		 1614 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1615 list_del(&sev->node);
0996517c
HV		 1616 kfree(ctrl);
1617 }
1618 kfree(hdl->buckets);
1619 hdl->buckets = NULL;
1620 hdl->cached = NULL;
1621 hdl->error = 0;
77e7c4e6 1622 mutex_unlock(hdl->lock);
0996517c
HV		 1623}
1624EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1625
1626/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1627 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1628 with applications that do not use the NEXT_CTRL flag.
1629
1630 We just find the n-th private user control. It's O(N), but that should not
1631 be an issue in this particular case. */
1632static struct v4l2_ctrl_ref *find_private_ref(
1633 struct v4l2_ctrl_handler *hdl, u32 id)
1634{
1635 struct v4l2_ctrl_ref *ref;
1636
1637 id -= V4L2_CID_PRIVATE_BASE;
1638 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1639 /* Search for private user controls that are compatible with
1640 VIDIOC_G/S_CTRL. */
1641 if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
1642 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1643 if (!ref->ctrl->is_int)
0996517c
HV		 1644 continue;
1645 if (id == 0)
1646 return ref;
1647 id--;
1648 }
1649 }
1650 return NULL;
1651}
1652
1653/* Find a control with the given ID. */
1654static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1655{
1656 struct v4l2_ctrl_ref *ref;
1657 int bucket;
1658
1659 id &= V4L2_CTRL_ID_MASK;
1660
1661 /* Old-style private controls need special handling */
1662 if (id >= V4L2_CID_PRIVATE_BASE)
1663 return find_private_ref(hdl, id);
1664 bucket = id % hdl->nr_of_buckets;
1665
1666 /* Simple optimization: cache the last control found */
1667 if (hdl->cached && hdl->cached->ctrl->id == id)
1668 return hdl->cached;
1669
1670 /* Not in cache, search the hash */
1671 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1672 while (ref && ref->ctrl->id != id)
1673 ref = ref->next;
1674
1675 if (ref)
1676 hdl->cached = ref; /* cache it! */
1677 return ref;
1678}
1679
1680/* Find a control with the given ID. Take the handler's lock first. */
1681static struct v4l2_ctrl_ref *find_ref_lock(
1682 struct v4l2_ctrl_handler *hdl, u32 id)
1683{
1684 struct v4l2_ctrl_ref *ref = NULL;
1685
1686 if (hdl) {
77e7c4e6 1687 mutex_lock(hdl->lock);
0996517c 1688 ref = find_ref(hdl, id);
77e7c4e6 1689 mutex_unlock(hdl->lock);
0996517c
HV		 1690 }
1691 return ref;
1692}
1693
1694/* Find a control with the given ID. */
1695struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1696{
1697 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1698
1699 return ref ? ref->ctrl : NULL;
1700}
1701EXPORT_SYMBOL(v4l2_ctrl_find);
1702
1703/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1704static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1705 struct v4l2_ctrl *ctrl)
1706{
1707 struct v4l2_ctrl_ref *ref;
1708 struct v4l2_ctrl_ref *new_ref;
1709 u32 id = ctrl->id;
1710 u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
1711 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1712
d9a25471
HV		 1713 /*
1714 * Automatically add the control class if it is not yet present and
1715 * the new control is not a compound control.
1716 */
1717 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1718 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1719 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1720 return hdl->error;
1721
1722 if (hdl->error)
1723 return hdl->error;
1724
1725 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1726 if (!new_ref)
1727 return handler_set_err(hdl, -ENOMEM);
1728 new_ref->ctrl = ctrl;
1729 if (ctrl->handler == hdl) {
1730 /* By default each control starts in a cluster of its own.
1731 new_ref->ctrl is basically a cluster array with one
1732 element, so that's perfect to use as the cluster pointer.
1733 But only do this for the handler that owns the control. */
1734 ctrl->cluster = &new_ref->ctrl;
1735 ctrl->ncontrols = 1;
1736 }
1737
1738 INIT_LIST_HEAD(&new_ref->node);
1739
77e7c4e6 1740 mutex_lock(hdl->lock);
0996517c
HV		 1741
1742 /* Add immediately at the end of the list if the list is empty, or if
1743 the last element in the list has a lower ID.
1744 This ensures that when elements are added in ascending order the
1745 insertion is an O(1) operation. */
1746 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1747 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1748 goto insert_in_hash;
1749 }
1750
1751 /* Find insert position in sorted list */
1752 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1753 if (ref->ctrl->id < id)
1754 continue;
1755 /* Don't add duplicates */
1756 if (ref->ctrl->id == id) {
1757 kfree(new_ref);
1758 goto unlock;
1759 }
1760 list_add(&new_ref->node, ref->node.prev);
1761 break;
1762 }
1763
1764insert_in_hash:
1765 /* Insert the control node in the hash */
1766 new_ref->next = hdl->buckets[bucket];
1767 hdl->buckets[bucket] = new_ref;
1768
1769unlock:
77e7c4e6 1770 mutex_unlock(hdl->lock);
0996517c
HV		 1771 return 0;
1772}
1773
1774/* Add a new control */
1775static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1776 const struct v4l2_ctrl_ops *ops,
0176077a 1777 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1778 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1779 s64 min, s64 max, u64 step, s64 def,
20d88eef 1780 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 1781 u32 flags, const char * const *qmenu,
1782 const s64 *qmenu_int, void *priv)
0996517c
HV		 1783{
1784 struct v4l2_ctrl *ctrl;
d9a25471 1785 unsigned sz_extra;
20d88eef
HV		 1786 unsigned nr_of_dims = 0;
1787 unsigned elems = 1;
998e7659
HV		 1788 bool is_array;
1789 unsigned tot_ctrl_size;
302ab7ce 1790 unsigned idx;
d9a25471 1791 void *data;
2ccbe779 1792 int err;
0996517c
HV		 1793
1794 if (hdl->error)
1795 return NULL;
1796
20d88eef
HV		 1797 while (dims && dims[nr_of_dims]) {
1798 elems *= dims[nr_of_dims];
1799 nr_of_dims++;
1800 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1801 break;
1802 }
998e7659 1803 is_array = nr_of_dims > 0;
20d88eef 1804
d9a25471
HV		 1805 if (type == V4L2_CTRL_TYPE_INTEGER64)
1806 elem_size = sizeof(s64);
1807 else if (type == V4L2_CTRL_TYPE_STRING)
1808 elem_size = max + 1;
1809 else if (type < V4L2_CTRL_COMPOUND_TYPES)
1810 elem_size = sizeof(s32);
998e7659 1811 tot_ctrl_size = elem_size * elems;
d9a25471 1812
0996517c 1813 /* Sanity checks */
998e7659
HV		 1814 if (id == 0 || name == NULL || !elem_size ||
1815 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1816 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1817 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1818 handler_set_err(hdl, -ERANGE);
1819 return NULL;
1820 }
2ccbe779
SN		 1821 err = check_range(type, min, max, step, def);
1822 if (err) {
1823 handler_set_err(hdl, err);
02ac0480
HV		 1824 return NULL;
1825 }
fa4d7096
HV		 1826 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1827 handler_set_err(hdl, -ERANGE);
1828 return NULL;
1829 }
998e7659
HV		 1830 if (is_array &&
1831 (type == V4L2_CTRL_TYPE_BUTTON ||
1832 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
1833 handler_set_err(hdl, -EINVAL);
1834 return NULL;
1835 }
0996517c 1836
d9a25471 1837 sz_extra = 0;
0996517c
HV		 1838 if (type == V4L2_CTRL_TYPE_BUTTON)
1839 flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
1840 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1841 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 1842 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
1843 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 1844 type >= V4L2_CTRL_COMPOUND_TYPES ||
1845 is_array)
1846 sz_extra += 2 * tot_ctrl_size;
0996517c
HV		 1847
1848 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
1849 if (ctrl == NULL) {
1850 handler_set_err(hdl, -ENOMEM);
1851 return NULL;
1852 }
1853
1854 INIT_LIST_HEAD(&ctrl->node);
77068d36 1855 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 1856 ctrl->handler = hdl;
1857 ctrl->ops = ops;
0176077a 1858 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 1859 ctrl->id = id;
1860 ctrl->name = name;
1861 ctrl->type = type;
1862 ctrl->flags = flags;
1863 ctrl->minimum = min;
1864 ctrl->maximum = max;
1865 ctrl->step = step;
d9a25471 1866 ctrl->default_value = def;
998e7659
HV		 1867 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
1868 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 1869 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 1870 ctrl->is_array = is_array;
20d88eef
HV		 1871 ctrl->elems = elems;
1872 ctrl->nr_of_dims = nr_of_dims;
1873 if (nr_of_dims)
1874 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 1875 ctrl->elem_size = elem_size;
ce580fe5
SA		 1876 if (type == V4L2_CTRL_TYPE_MENU)
1877 ctrl->qmenu = qmenu;
1878 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1879 ctrl->qmenu_int = qmenu_int;
0996517c 1880 ctrl->priv = priv;
d9a25471 1881 ctrl->cur.val = ctrl->val = def;
2a9ec373 1882 data = &ctrl[1];
d9a25471 1883
2a9ec373
HV		 1884 if (!ctrl->is_int) {
1885 ctrl->p_new.p = data;
998e7659 1886 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 1887 } else {
1888 ctrl->p_new.p = &ctrl->val;
1889 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 1890 }
302ab7ce
HV		 1891 for (idx = 0; idx < elems; idx++) {
1892 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
1893 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
1894 }
0176077a 1895
0996517c
HV		 1896 if (handler_new_ref(hdl, ctrl)) {
1897 kfree(ctrl);
1898 return NULL;
1899 }
77e7c4e6 1900 mutex_lock(hdl->lock);
0996517c 1901 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 1902 mutex_unlock(hdl->lock);
0996517c
HV		 1903 return ctrl;
1904}
1905
1906struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
1907 const struct v4l2_ctrl_config *cfg, void *priv)
1908{
1909 bool is_menu;
1910 struct v4l2_ctrl *ctrl;
1911 const char *name = cfg->name;
513521ea 1912 const char * const *qmenu = cfg->qmenu;
ce580fe5 1913 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 1914 enum v4l2_ctrl_type type = cfg->type;
1915 u32 flags = cfg->flags;
0ba2aeb6
HV		 1916 s64 min = cfg->min;
1917 s64 max = cfg->max;
1918 u64 step = cfg->step;
1919 s64 def = cfg->def;
0996517c
HV		 1920
1921 if (name == NULL)
1922 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
1923 &def, &flags);
1924
ce580fe5
SA		 1925 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
1926 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 1927 if (is_menu)
1928 WARN_ON(step);
1929 else
1930 WARN_ON(cfg->menu_skip_mask);
ce580fe5 1931 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 1932 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 1933 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
1934 qmenu_int == NULL) {
1935 handler_set_err(hdl, -EINVAL);
1936 return NULL;
1937 }
0996517c 1938
0176077a 1939 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 1940 type, min, max,
20d88eef
HV		 1941 is_menu ? cfg->menu_skip_mask : step, def,
1942 cfg->dims, cfg->elem_size,
d9a25471 1943 flags, qmenu, qmenu_int, priv);
88365105 1944 if (ctrl)
0996517c 1945 ctrl->is_private = cfg->is_private;
0996517c
HV		 1946 return ctrl;
1947}
1948EXPORT_SYMBOL(v4l2_ctrl_new_custom);
1949
1950/* Helper function for standard non-menu controls */
1951struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
1952 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 1953 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 1954{
1955 const char *name;
1956 enum v4l2_ctrl_type type;
1957 u32 flags;
1958
1959 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 1960 if (type == V4L2_CTRL_TYPE_MENU ||
1961 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
1962 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 1963 handler_set_err(hdl, -EINVAL);
1964 return NULL;
1965 }
0176077a 1966 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 1967 min, max, step, def, NULL, 0,
d9a25471 1968 flags, NULL, NULL, NULL);
0996517c
HV		 1969}
1970EXPORT_SYMBOL(v4l2_ctrl_new_std);
1971
1972/* Helper function for standard menu controls */
1973struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
1974 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 1975 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 1976{
d1e9b7c1
SN		 1977 const char * const *qmenu = NULL;
1978 const s64 *qmenu_int = NULL;
fbbb29a6 1979 unsigned int qmenu_int_len = 0;
0996517c
HV		 1980 const char *name;
1981 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 1982 s64 min;
1983 s64 max = _max;
1984 s64 def = _def;
1985 u64 step;
0996517c
HV		 1986 u32 flags;
1987
1988 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 1989
1990 if (type == V4L2_CTRL_TYPE_MENU)
1991 qmenu = v4l2_ctrl_get_menu(id);
1992 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
1993 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
1994
1995 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 1996 handler_set_err(hdl, -EINVAL);
1997 return NULL;
1998 }
0176077a 1999 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2000 0, max, mask, def, NULL, 0,
d9a25471 2001 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2002}
2003EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2004
117a711a
LP		 2005/* Helper function for standard menu controls with driver defined menu */
2006struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2007 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2008 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2009{
2010 enum v4l2_ctrl_type type;
2011 const char *name;
2012 u32 flags;
0ba2aeb6
HV		 2013 u64 step;
2014 s64 min;
2015 s64 max = _max;
2016 s64 def = _def;
117a711a
LP		 2017
2018 /* v4l2_ctrl_new_std_menu_items() should only be called for
2019 * standard controls without a standard menu.
2020 */
2021 if (v4l2_ctrl_get_menu(id)) {
2022 handler_set_err(hdl, -EINVAL);
2023 return NULL;
2024 }
2025
2026 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2027 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2028 handler_set_err(hdl, -EINVAL);
2029 return NULL;
2030 }
0176077a 2031 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2032 0, max, mask, def, NULL, 0,
2033 flags, qmenu, NULL, NULL);
117a711a
LP		 2034
2035}
2036EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2037
515f3287
SN		 2038/* Helper function for standard integer menu controls */
2039struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2040 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2041 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2042{
2043 const char *name;
2044 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2045 s64 min;
2046 u64 step;
2047 s64 max = _max;
2048 s64 def = _def;
515f3287
SN		 2049 u32 flags;
2050
2051 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2052 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2053 handler_set_err(hdl, -EINVAL);
2054 return NULL;
2055 }
0176077a 2056 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2057 0, max, 0, def, NULL, 0,
d9a25471 2058 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2059}
2060EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2061
0996517c
HV		 2062/* Add a control from another handler to this handler */
2063struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
2064 struct v4l2_ctrl *ctrl)
2065{
2066 if (hdl == NULL || hdl->error)
2067 return NULL;
2068 if (ctrl == NULL) {
2069 handler_set_err(hdl, -EINVAL);
2070 return NULL;
2071 }
2072 if (ctrl->handler == hdl)
2073 return ctrl;
2074 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
2075}
2076EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
2077
2078/* Add the controls from another handler to our own. */
2079int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2080 struct v4l2_ctrl_handler *add,
2081 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2082{
072e6602 2083 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2084 int ret = 0;
2085
2086 /* Do nothing if either handler is NULL or if they are the same */
2087 if (!hdl || !add || hdl == add)
2088 return 0;
2089 if (hdl->error)
2090 return hdl->error;
77e7c4e6 2091 mutex_lock(add->lock);
072e6602
HV		 2092 list_for_each_entry(ref, &add->ctrl_refs, node) {
2093 struct v4l2_ctrl *ctrl = ref->ctrl;
2094
0996517c
HV		 2095 /* Skip handler-private controls. */
2096 if (ctrl->is_private)
2097 continue;
6e239399
HV		 2098 /* And control classes */
2099 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2100 continue;
34a6b7d0
HV		 2101 /* Filter any unwanted controls */
2102 if (filter && !filter(ctrl))
2103 continue;
0996517c
HV		 2104 ret = handler_new_ref(hdl, ctrl);
2105 if (ret)
2106 break;
2107 }
77e7c4e6 2108 mutex_unlock(add->lock);
0996517c
HV		 2109 return ret;
2110}
2111EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2112
34a6b7d0
HV		 2113bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2114{
2115 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
2116 return true;
3963d4fb
HV		 2117 if (V4L2_CTRL_ID2CLASS(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
2118 return true;
34a6b7d0
HV		 2119 switch (ctrl->id) {
2120 case V4L2_CID_AUDIO_MUTE:
2121 case V4L2_CID_AUDIO_VOLUME:
2122 case V4L2_CID_AUDIO_BALANCE:
2123 case V4L2_CID_AUDIO_BASS:
2124 case V4L2_CID_AUDIO_TREBLE:
2125 case V4L2_CID_AUDIO_LOUDNESS:
2126 return true;
2127 default:
2128 break;
2129 }
2130 return false;
2131}
2132EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2133
0996517c
HV		 2134/* Cluster controls */
2135void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2136{
5626b8c7 2137 bool has_volatiles = false;
0996517c
HV		 2138 int i;
2139
2140 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2141 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2142 return;
0996517c
HV		 2143
2144 for (i = 0; i < ncontrols; i++) {
2145 if (controls[i]) {
2146 controls[i]->cluster = controls;
2147 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2148 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2149 has_volatiles = true;
0996517c
HV		 2150 }
2151 }
5626b8c7 2152 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2153}
2154EXPORT_SYMBOL(v4l2_ctrl_cluster);
2155
72d877ca
HV		 2156void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2157 u8 manual_val, bool set_volatile)
2158{
2159 struct v4l2_ctrl *master = controls[0];
5626b8c7 2160 u32 flag = 0;
72d877ca
HV		 2161 int i;
2162
2163 v4l2_ctrl_cluster(ncontrols, controls);
2164 WARN_ON(ncontrols <= 1);
82a7c049 2165 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2166 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2167 master->is_auto = true;
5626b8c7 2168 master->has_volatiles = set_volatile;
72d877ca
HV		 2169 master->manual_mode_value = manual_val;
2170 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2171
2172 if (!is_cur_manual(master))
2173 flag = V4L2_CTRL_FLAG_INACTIVE |
2174 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2175
2176 for (i = 1; i < ncontrols; i++)
88365105 2177 if (controls[i])
72d877ca 2178 controls[i]->flags |= flag;
72d877ca
HV		 2179}
2180EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2181
0996517c
HV		 2182/* Activate/deactivate a control. */
2183void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2184{
6e239399
HV		 2185 /* invert since the actual flag is called 'inactive' */
2186 bool inactive = !active;
2187 bool old;
2188
0996517c
HV		 2189 if (ctrl == NULL)
2190 return;
2191
6e239399 2192 if (inactive)
0996517c 2193 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2194 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2195 else
2196 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2197 old = test_and_clear_bit(4, &ctrl->flags);
2198 if (old != inactive)
2199 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2200}
2201EXPORT_SYMBOL(v4l2_ctrl_activate);
2202
2203/* Grab/ungrab a control.
2204 Typically used when streaming starts and you want to grab controls,
2205 preventing the user from changing them.
2206
2207 Just call this and the framework will block any attempts to change
2208 these controls. */
2209void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2210{
6e239399
HV		 2211 bool old;
2212
0996517c
HV		 2213 if (ctrl == NULL)
2214 return;
2215
6e239399 2216 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2217 if (grabbed)
2218 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2219 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2220 else
2221 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2222 old = test_and_clear_bit(1, &ctrl->flags);
2223 if (old != grabbed)
2224 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2225 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2226}
2227EXPORT_SYMBOL(v4l2_ctrl_grab);
2228
2229/* Log the control name and value */
2230static void log_ctrl(const struct v4l2_ctrl *ctrl,
2231 const char *prefix, const char *colon)
2232{
0996517c
HV		 2233 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2234 return;
2235 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2236 return;
2237
7eafbce9 2238 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2239
0176077a
HV		 2240 ctrl->type_ops->log(ctrl);
2241
88365105
HV		 2242 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2243 V4L2_CTRL_FLAG_GRABBED |
2244 V4L2_CTRL_FLAG_VOLATILE)) {
2245 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2246 pr_cont(" inactive");
88365105 2247 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2248 pr_cont(" grabbed");
88365105 2249 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2250 pr_cont(" volatile");
88365105 2251 }
7eafbce9 2252 pr_cont("\n");
0996517c
HV		 2253}
2254
2255/* Log all controls owned by the handler */
2256void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2257 const char *prefix)
2258{
2259 struct v4l2_ctrl *ctrl;
2260 const char *colon = "";
2261 int len;
2262
2263 if (hdl == NULL)
2264 return;
2265 if (prefix == NULL)
2266 prefix = "";
2267 len = strlen(prefix);
2268 if (len && prefix[len - 1] != ' ')
2269 colon = ": ";
77e7c4e6 2270 mutex_lock(hdl->lock);
0996517c
HV		 2271 list_for_each_entry(ctrl, &hdl->ctrls, node)
2272 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2273 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2274 mutex_unlock(hdl->lock);
0996517c
HV		 2275}
2276EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2277
ffa9b9f0
SN		 2278int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2279{
2280 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2281 return 0;
2282}
2283EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2284
0996517c
HV		 2285/* Call s_ctrl for all controls owned by the handler */
2286int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2287{
2288 struct v4l2_ctrl *ctrl;
2289 int ret = 0;
2290
2291 if (hdl == NULL)
2292 return 0;
77e7c4e6 2293 mutex_lock(hdl->lock);
0996517c
HV		 2294 list_for_each_entry(ctrl, &hdl->ctrls, node)
2295 ctrl->done = false;
2296
2297 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2298 struct v4l2_ctrl *master = ctrl->cluster[0];
2299 int i;
2300
2301 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2302 /* Skip button controls and read-only controls. */
2303 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2304 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2305 continue;
2306
2a863793
HV		 2307 for (i = 0; i < master->ncontrols; i++) {
2308 if (master->cluster[i]) {
2309 cur_to_new(master->cluster[i]);
2310 master->cluster[i]->is_new = 1;
71c6c4c9 2311 master->cluster[i]->done = true;
2a863793
HV		 2312 }
2313 }
54c911eb 2314 ret = call_op(master, s_ctrl);
0996517c
HV		 2315 if (ret)
2316 break;
0996517c 2317 }
77e7c4e6 2318 mutex_unlock(hdl->lock);
0996517c
HV		 2319 return ret;
2320}
2321EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2322
d9a25471
HV		 2323/* Implement VIDIOC_QUERY_EXT_CTRL */
2324int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2325{
d9a25471 2326 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2327 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2328 struct v4l2_ctrl_ref *ref;
2329 struct v4l2_ctrl *ctrl;
2330
2331 if (hdl == NULL)
2332 return -EINVAL;
2333
77e7c4e6 2334 mutex_lock(hdl->lock);
0996517c
HV		 2335
2336 /* Try to find it */
2337 ref = find_ref(hdl, id);
2338
d9a25471
HV		 2339 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2340 bool is_compound;
2341 /* Match any control that is not hidden */
2342 unsigned mask = 1;
2343 bool match = false;
2344
2345 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2346 /* Match any hidden control */
2347 match = true;
2348 } else if ((qc->id & next_flags) == next_flags) {
2349 /* Match any control, compound or not */
2350 mask = 0;
2351 }
2352
0996517c
HV		 2353 /* Find the next control with ID > qc->id */
2354
2355 /* Did we reach the end of the control list? */
2356 if (id >= node2id(hdl->ctrl_refs.prev)) {
2357 ref = NULL; /* Yes, so there is no next control */
2358 } else if (ref) {
2359 /* We found a control with the given ID, so just get
d9a25471
HV		 2360 the next valid one in the list. */
2361 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
2362 is_compound =
2363 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2364 if (id < ref->ctrl->id &&
2365 (is_compound & mask) == match)
2366 break;
2367 }
2368 if (&ref->node == &hdl->ctrl_refs)
2369 ref = NULL;
0996517c
HV		 2370 } else {
2371 /* No control with the given ID exists, so start
2372 searching for the next largest ID. We know there
2373 is one, otherwise the first 'if' above would have
2374 been true. */
d9a25471
HV		 2375 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
2376 is_compound =
2377 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2378 if (id < ref->ctrl->id &&
2379 (is_compound & mask) == match)
0996517c 2380 break;
d9a25471
HV		 2381 }
2382 if (&ref->node == &hdl->ctrl_refs)
2383 ref = NULL;
0996517c
HV		 2384 }
2385 }
77e7c4e6 2386 mutex_unlock(hdl->lock);
d9a25471 2387
0996517c
HV		 2388 if (!ref)
2389 return -EINVAL;
2390
2391 ctrl = ref->ctrl;
2392 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2393 if (id >= V4L2_CID_PRIVATE_BASE)
2394 qc->id = id;
2395 else
2396 qc->id = ctrl->id;
0996517c 2397 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
d9a25471
HV		 2398 qc->flags = ctrl->flags;
2399 qc->type = ctrl->type;
2400 if (ctrl->is_ptr)
2401 qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
2402 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2403 qc->elems = ctrl->elems;
2404 qc->nr_of_dims = ctrl->nr_of_dims;
2405 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2406 qc->minimum = ctrl->minimum;
2407 qc->maximum = ctrl->maximum;
2408 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2409 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2410 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2411 qc->step = 1;
2412 else
2413 qc->step = ctrl->step;
d9a25471
HV		 2414 return 0;
2415}
2416EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2417
2418/* Implement VIDIOC_QUERYCTRL */
2419int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2420{
2421 struct v4l2_query_ext_ctrl qec = { qc->id };
2422 int rc;
2423
2424 rc = v4l2_query_ext_ctrl(hdl, &qec);
2425 if (rc)
2426 return rc;
2427
2428 qc->id = qec.id;
2429 qc->type = qec.type;
2430 qc->flags = qec.flags;
2431 strlcpy(qc->name, qec.name, sizeof(qc->name));
2432 switch (qc->type) {
2433 case V4L2_CTRL_TYPE_INTEGER:
2434 case V4L2_CTRL_TYPE_BOOLEAN:
2435 case V4L2_CTRL_TYPE_MENU:
2436 case V4L2_CTRL_TYPE_INTEGER_MENU:
2437 case V4L2_CTRL_TYPE_STRING:
2438 case V4L2_CTRL_TYPE_BITMASK:
2439 qc->minimum = qec.minimum;
2440 qc->maximum = qec.maximum;
2441 qc->step = qec.step;
2442 qc->default_value = qec.default_value;
2443 break;
2444 default:
2445 qc->minimum = 0;
2446 qc->maximum = 0;
2447 qc->step = 0;
2448 qc->default_value = 0;
2449 break;
2450 }
0996517c
HV		 2451 return 0;
2452}
2453EXPORT_SYMBOL(v4l2_queryctrl);
2454
2455int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2456{
d9a25471 2457 if (qc->id & (V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND))
87a0c94c 2458 return -EINVAL;
0996517c
HV		 2459 return v4l2_queryctrl(sd->ctrl_handler, qc);
2460}
2461EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2462
2463/* Implement VIDIOC_QUERYMENU */
2464int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2465{
2466 struct v4l2_ctrl *ctrl;
2467 u32 i = qm->index;
2468
2469 ctrl = v4l2_ctrl_find(hdl, qm->id);
2470 if (!ctrl)
2471 return -EINVAL;
2472
2473 qm->reserved = 0;
2474 /* Sanity checks */
ce580fe5
SA		 2475 switch (ctrl->type) {
2476 case V4L2_CTRL_TYPE_MENU:
2477 if (ctrl->qmenu == NULL)
2478 return -EINVAL;
2479 break;
2480 case V4L2_CTRL_TYPE_INTEGER_MENU:
2481 if (ctrl->qmenu_int == NULL)
2482 return -EINVAL;
2483 break;
2484 default:
2485 return -EINVAL;
2486 }
2487
2488 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2489 return -EINVAL;
ce580fe5 2490
0996517c
HV		 2491 /* Use mask to see if this menu item should be skipped */
2492 if (ctrl->menu_skip_mask & (1 << i))
2493 return -EINVAL;
2494 /* Empty menu items should also be skipped */
ce580fe5
SA		 2495 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2496 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2497 return -EINVAL;
2498 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2499 } else {
2500 qm->value = ctrl->qmenu_int[i];
2501 }
0996517c
HV		 2502 return 0;
2503}
2504EXPORT_SYMBOL(v4l2_querymenu);
2505
2506int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2507{
2508 return v4l2_querymenu(sd->ctrl_handler, qm);
2509}
2510EXPORT_SYMBOL(v4l2_subdev_querymenu);
2511
2512
2513
2514/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2515
2516 It is not a fully atomic operation, just best-effort only. After all, if
2517 multiple controls have to be set through multiple i2c writes (for example)
2518 then some initial writes may succeed while others fail. Thus leaving the
2519 system in an inconsistent state. The question is how much effort you are
2520 willing to spend on trying to make something atomic that really isn't.
2521
2522 From the point of view of an application the main requirement is that
2523 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2524 error should be returned without actually affecting any controls.
2525
2526 If all the values are correct, then it is acceptable to just give up
2527 in case of low-level errors.
2528
2529 It is important though that the application can tell when only a partial
2530 configuration was done. The way we do that is through the error_idx field
2531 of struct v4l2_ext_controls: if that is equal to the count field then no
2532 controls were affected. Otherwise all controls before that index were
2533 successful in performing their 'get' or 'set' operation, the control at
2534 the given index failed, and you don't know what happened with the controls
2535 after the failed one. Since if they were part of a control cluster they
2536 could have been successfully processed (if a cluster member was encountered
2537 at index < error_idx), they could have failed (if a cluster member was at
2538 error_idx), or they may not have been processed yet (if the first cluster
2539 member appeared after error_idx).
2540
2541 It is all fairly theoretical, though. In practice all you can do is to
2542 bail out. If error_idx == count, then it is an application bug. If
2543 error_idx < count then it is only an application bug if the error code was
2544 EBUSY. That usually means that something started streaming just when you
2545 tried to set the controls. In all other cases it is a driver/hardware
2546 problem and all you can do is to retry or bail out.
2547
2548 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2549 never modifies controls the error_idx is just set to whatever control
2550 has an invalid value.
2551 */
2552
2553/* Prepare for the extended g/s/try functions.
2554 Find the controls in the control array and do some basic checks. */
2555static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2556 struct v4l2_ext_controls *cs,
d9a25471
HV		 2557 struct v4l2_ctrl_helper *helpers,
2558 bool get)
0996517c 2559{
eb5b16ef
HV		 2560 struct v4l2_ctrl_helper *h;
2561 bool have_clusters = false;
0996517c
HV		 2562 u32 i;
2563
eb5b16ef 2564 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2565 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2566 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2567 struct v4l2_ctrl *ctrl;
2568 u32 id = c->id & V4L2_CTRL_ID_MASK;
2569
37cd3b73 2570 cs->error_idx = i;
0996517c
HV		 2571
2572 if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
2573 return -EINVAL;
2574
2575 /* Old-style private controls are not allowed for
2576 extended controls */
2577 if (id >= V4L2_CID_PRIVATE_BASE)
2578 return -EINVAL;
eb5b16ef
HV		 2579 ref = find_ref_lock(hdl, id);
2580 if (ref == NULL)
0996517c 2581 return -EINVAL;
eb5b16ef 2582 ctrl = ref->ctrl;
0996517c
HV		 2583 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2584 return -EINVAL;
2585
eb5b16ef
HV		 2586 if (ctrl->cluster[0]->ncontrols > 1)
2587 have_clusters = true;
2588 if (ctrl->cluster[0] != ctrl)
2589 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 2590 if (ctrl->is_ptr && !ctrl->is_string) {
2591 unsigned tot_size = ctrl->elems * ctrl->elem_size;
2592
2593 if (c->size < tot_size) {
2594 if (get) {
2595 c->size = tot_size;
2596 return -ENOSPC;
2597 }
2598 return -EFAULT;
d9a25471 2599 }
302ab7ce 2600 c->size = tot_size;
d9a25471 2601 }
eb5b16ef
HV		 2602 /* Store the ref to the master control of the cluster */
2603 h->mref = ref;
2604 h->ctrl = ctrl;
2605 /* Initially set next to 0, meaning that there is no other
2606 control in this helper array belonging to the same
2607 cluster */
2608 h->next = 0;
0996517c 2609 }
0996517c 2610
eb5b16ef
HV		 2611 /* We are done if there were no controls that belong to a multi-
2612 control cluster. */
2613 if (!have_clusters)
2614 return 0;
0996517c 2615
eb5b16ef
HV		 2616 /* The code below figures out in O(n) time which controls in the list
2617 belong to the same cluster. */
0996517c 2618
eb5b16ef 2619 /* This has to be done with the handler lock taken. */
77e7c4e6 2620 mutex_lock(hdl->lock);
0996517c 2621
eb5b16ef
HV		 2622 /* First zero the helper field in the master control references */
2623 for (i = 0; i < cs->count; i++)
c082266f 2624 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2625 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2626 struct v4l2_ctrl_ref *mref = h->mref;
2627
2628 /* If the mref->helper is set, then it points to an earlier
2629 helper that belongs to the same cluster. */
2630 if (mref->helper) {
2631 /* Set the next field of mref->helper to the current
2632 index: this means that that earlier helper now
2633 points to the next helper in the same cluster. */
2634 mref->helper->next = i;
2635 /* mref should be set only for the first helper in the
2636 cluster, clear the others. */
2637 h->mref = NULL;
2638 }
2639 /* Point the mref helper to the current helper struct. */
2640 mref->helper = h;
0996517c 2641 }
77e7c4e6 2642 mutex_unlock(hdl->lock);
eb5b16ef 2643 return 0;
0996517c
HV		 2644}
2645
2646/* Handles the corner case where cs->count == 0. It checks whether the
2647 specified control class exists. If that class ID is 0, then it checks
2648 whether there are any controls at all. */
2649static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
2650{
2651 if (ctrl_class == 0)
2652 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
2653 return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
2654}
2655
2656
2657
2658/* Get extended controls. Allocates the helpers array if needed. */
2659int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2660{
eb5b16ef
HV		 2661 struct v4l2_ctrl_helper helper[4];
2662 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2663 int ret;
ddac5c10 2664 int i, j;
0996517c
HV		 2665
2666 cs->error_idx = cs->count;
2667 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2668
2669 if (hdl == NULL)
2670 return -EINVAL;
2671
2672 if (cs->count == 0)
2673 return class_check(hdl, cs->ctrl_class);
2674
2675 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2676 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2677 GFP_KERNEL);
0996517c
HV		 2678 if (helpers == NULL)
2679 return -ENOMEM;
2680 }
2681
d9a25471 2682 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2683 cs->error_idx = cs->count;
0996517c
HV		 2684
2685 for (i = 0; !ret && i < cs->count; i++)
2686 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2687 ret = -EACCES;
2688
2689 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2690 int (*ctrl_to_user)(struct v4l2_ext_control *c,
2691 struct v4l2_ctrl *ctrl) = cur_to_user;
2692 struct v4l2_ctrl *master;
0996517c 2693
eb5b16ef 2694 if (helpers[i].mref == NULL)
0996517c
HV		 2695 continue;
2696
eb5b16ef 2697 master = helpers[i].mref->ctrl;
0996517c
HV		 2698 cs->error_idx = i;
2699
2700 v4l2_ctrl_lock(master);
ddac5c10
HV		 2701
2702 /* g_volatile_ctrl will update the new control values */
5626b8c7
HV		 2703 if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2704 (master->has_volatiles && !is_cur_manual(master))) {
ddac5c10
HV		 2705 for (j = 0; j < master->ncontrols; j++)
2706 cur_to_new(master->cluster[j]);
54c911eb 2707 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2708 ctrl_to_user = new_to_user;
ddac5c10
HV		 2709 }
2710 /* If OK, then copy the current (for non-volatile controls)
2711 or the new (for volatile controls) control values to the
2712 caller */
eb5b16ef
HV		 2713 if (!ret) {
2714 u32 idx = i;
2715
2716 do {
2717 ret = ctrl_to_user(cs->controls + idx,
2718 helpers[idx].ctrl);
2719 idx = helpers[idx].next;
2720 } while (!ret && idx);
2721 }
0996517c 2722 v4l2_ctrl_unlock(master);
0996517c
HV		 2723 }
2724
2725 if (cs->count > ARRAY_SIZE(helper))
2726 kfree(helpers);
2727 return ret;
2728}
2729EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2730
2731int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2732{
2733 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2734}
2735EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2736
2737/* Helper function to get a single control */
03d5285b 2738static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2739{
2740 struct v4l2_ctrl *master = ctrl->cluster[0];
2741 int ret = 0;
ddac5c10 2742 int i;
0996517c 2743
d9a25471 2744 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2745 * cur_to_user() calls below would need to be modified not to access
2746 * userspace memory when called from get_ctrl().
2747 */
d9a25471 2748 if (!ctrl->is_int)
03d5285b
LP		 2749 return -EINVAL;
2750
0996517c
HV		 2751 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2752 return -EACCES;
2753
2754 v4l2_ctrl_lock(master);
2755 /* g_volatile_ctrl will update the current control values */
5626b8c7 2756 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2757 for (i = 0; i < master->ncontrols; i++)
2758 cur_to_new(master->cluster[i]);
54c911eb 2759 ret = call_op(master, g_volatile_ctrl);
03d5285b 2760 new_to_user(c, ctrl);
ddac5c10 2761 } else {
03d5285b 2762 cur_to_user(c, ctrl);
ddac5c10 2763 }
0996517c
HV		 2764 v4l2_ctrl_unlock(master);
2765 return ret;
2766}
2767
2768int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2769{
2770 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2771 struct v4l2_ext_control c;
2772 int ret;
0996517c 2773
d9a25471 2774 if (ctrl == NULL || !ctrl->is_int)
0996517c 2775 return -EINVAL;
03d5285b
LP		 2776 ret = get_ctrl(ctrl, &c);
2777 control->value = c.value;
2778 return ret;
0996517c
HV		 2779}
2780EXPORT_SYMBOL(v4l2_g_ctrl);
2781
2782int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2783{
2784 return v4l2_g_ctrl(sd->ctrl_handler, control);
2785}
2786EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2787
2788s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2789{
03d5285b 2790 struct v4l2_ext_control c;
0996517c
HV		 2791
2792 /* It's a driver bug if this happens. */
d9a25471 2793 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2794 c.value = 0;
2795 get_ctrl(ctrl, &c);
2796 return c.value;
0996517c
HV		 2797}
2798EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2799
03d5285b
LP		 2800s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2801{
2802 struct v4l2_ext_control c;
2803
2804 /* It's a driver bug if this happens. */
998e7659 2805 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
03d5285b
LP		 2806 c.value = 0;
2807 get_ctrl(ctrl, &c);
2808 return c.value;
2809}
2810EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2811
0996517c
HV		 2812
2813/* Core function that calls try/s_ctrl and ensures that the new value is
2814 copied to the current value on a set.
2815 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2816static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2817 bool set, u32 ch_flags)
0996517c 2818{
72d877ca 2819 bool update_flag;
eb5b16ef 2820 int ret;
0996517c
HV		 2821 int i;
2822
2823 /* Go through the cluster and either validate the new value or
2824 (if no new value was set), copy the current value to the new
2825 value, ensuring a consistent view for the control ops when
2826 called. */
eb5b16ef 2827 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2828 struct v4l2_ctrl *ctrl = master->cluster[i];
2829
2830 if (ctrl == NULL)
2831 continue;
2832
eb5b16ef
HV		 2833 if (!ctrl->is_new) {
2834 cur_to_new(ctrl);
0996517c
HV		 2835 continue;
2836 }
eb5b16ef
HV		 2837 /* Check again: it may have changed since the
2838 previous check in try_or_set_ext_ctrls(). */
2839 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2840 return -EBUSY;
0996517c
HV		 2841 }
2842
eb5b16ef 2843 ret = call_op(master, try_ctrl);
0996517c
HV		 2844
2845 /* Don't set if there is no change */
72d877ca
HV		 2846 if (ret || !set || !cluster_changed(master))
2847 return ret;
2848 ret = call_op(master, s_ctrl);
72d877ca
HV		 2849 if (ret)
2850 return ret;
2851
eb5b16ef 2852 /* If OK, then make the new values permanent. */
72d877ca
HV		 2853 update_flag = is_cur_manual(master) != is_new_manual(master);
2854 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 2855 new_to_cur(fh, master->cluster[i], ch_flags |
2856 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 2857 return 0;
0996517c
HV		 2858}
2859
e6402585
HV		 2860/* Validate controls. */
2861static int validate_ctrls(struct v4l2_ext_controls *cs,
2862 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 2863{
e6402585 2864 unsigned i;
0996517c
HV		 2865 int ret = 0;
2866
eb5b16ef 2867 cs->error_idx = cs->count;
0996517c
HV		 2868 for (i = 0; i < cs->count; i++) {
2869 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
2870
e6402585 2871 cs->error_idx = i;
0996517c
HV		 2872
2873 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
2874 return -EACCES;
2875 /* This test is also done in try_set_control_cluster() which
2876 is called in atomic context, so that has the final say,
2877 but it makes sense to do an up-front check as well. Once
2878 an error occurs in try_set_control_cluster() some other
2879 controls may have been set already and we want to do a
2880 best-effort to avoid that. */
2881 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
2882 return -EBUSY;
eb5b16ef
HV		 2883 ret = validate_new(ctrl, &cs->controls[i]);
2884 if (ret)
2885 return ret;
0996517c 2886 }
e6402585
HV		 2887 return 0;
2888}
2889
5626b8c7
HV		 2890/* Obtain the current volatile values of an autocluster and mark them
2891 as new. */
2892static void update_from_auto_cluster(struct v4l2_ctrl *master)
2893{
2894 int i;
2895
2896 for (i = 0; i < master->ncontrols; i++)
2897 cur_to_new(master->cluster[i]);
2898 if (!call_op(master, g_volatile_ctrl))
2899 for (i = 1; i < master->ncontrols; i++)
2900 if (master->cluster[i])
2901 master->cluster[i]->is_new = 1;
2902}
2903
e6402585
HV		 2904/* Try or try-and-set controls */
2905static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
2906 struct v4l2_ext_controls *cs,
2907 bool set)
2908{
2909 struct v4l2_ctrl_helper helper[4];
2910 struct v4l2_ctrl_helper *helpers = helper;
2911 unsigned i, j;
2912 int ret;
2913
2914 cs->error_idx = cs->count;
2915 cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
2916
2917 if (hdl == NULL)
2918 return -EINVAL;
2919
2920 if (cs->count == 0)
2921 return class_check(hdl, cs->ctrl_class);
0996517c 2922
e6402585 2923 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 2924 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2925 GFP_KERNEL);
e6402585
HV		 2926 if (!helpers)
2927 return -ENOMEM;
2928 }
d9a25471 2929 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 2930 if (!ret)
2931 ret = validate_ctrls(cs, helpers, set);
2932 if (ret && set)
2933 cs->error_idx = cs->count;
0996517c 2934 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 2935 struct v4l2_ctrl *master;
2936 u32 idx = i;
0996517c 2937
eb5b16ef 2938 if (helpers[i].mref == NULL)
0996517c
HV		 2939 continue;
2940
37cd3b73 2941 cs->error_idx = i;
eb5b16ef
HV		 2942 master = helpers[i].mref->ctrl;
2943 v4l2_ctrl_lock(master);
0996517c 2944
2a863793 2945 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 2946 for (j = 0; j < master->ncontrols; j++)
2947 if (master->cluster[j])
2a863793 2948 master->cluster[j]->is_new = 0;
0996517c 2949
5626b8c7
HV		 2950 /* For volatile autoclusters that are currently in auto mode
2951 we need to discover if it will be set to manual mode.
2952 If so, then we have to copy the current volatile values
2953 first since those will become the new manual values (which
2954 may be overwritten by explicit new values from this set
2955 of controls). */
2956 if (master->is_auto && master->has_volatiles &&
2957 !is_cur_manual(master)) {
2958 /* Pick an initial non-manual value */
2959 s32 new_auto_val = master->manual_mode_value + 1;
2960 u32 tmp_idx = idx;
2961
2962 do {
2963 /* Check if the auto control is part of the
2964 list, and remember the new value. */
2965 if (helpers[tmp_idx].ctrl == master)
2966 new_auto_val = cs->controls[tmp_idx].value;
2967 tmp_idx = helpers[tmp_idx].next;
2968 } while (tmp_idx);
2969 /* If the new value == the manual value, then copy
2970 the current volatile values. */
2971 if (new_auto_val == master->manual_mode_value)
2972 update_from_auto_cluster(master);
2973 }
2974
0996517c 2975 /* Copy the new caller-supplied control values.
2a863793 2976 user_to_new() sets 'is_new' to 1. */
eb5b16ef
HV		 2977 do {
2978 ret = user_to_new(cs->controls + idx, helpers[idx].ctrl);
2979 idx = helpers[idx].next;
2980 } while (!ret && idx);
0996517c
HV		 2981
2982 if (!ret)
2ccbe779 2983 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 2984
2985 /* Copy the new values back to userspace. */
eb5b16ef
HV		 2986 if (!ret) {
2987 idx = i;
2988 do {
adf41b9b 2989 ret = new_to_user(cs->controls + idx,
e6402585 2990 helpers[idx].ctrl);
eb5b16ef
HV		 2991 idx = helpers[idx].next;
2992 } while (!ret && idx);
2993 }
2994 v4l2_ctrl_unlock(master);
0996517c 2995 }
0996517c 2996
0996517c
HV		 2997 if (cs->count > ARRAY_SIZE(helper))
2998 kfree(helpers);
2999 return ret;
3000}
3001
3002int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
3003{
ab892bac 3004 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 3005}
3006EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3007
ab892bac
HV		 3008int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3009 struct v4l2_ext_controls *cs)
0996517c 3010{
ab892bac 3011 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 3012}
3013EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3014
3015int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3016{
ab892bac 3017 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 3018}
3019EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
3020
3021int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3022{
ab892bac 3023 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 3024}
3025EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
3026
3027/* Helper function for VIDIOC_S_CTRL compatibility */
03d5285b 3028static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
2ccbe779 3029 struct v4l2_ext_control *c, u32 ch_flags)
0996517c
HV		 3030{
3031 struct v4l2_ctrl *master = ctrl->cluster[0];
0996517c
HV		 3032 int i;
3033
d9a25471 3034 /* Compound controls are not supported. The user_to_new() and
03d5285b
LP		 3035 * cur_to_user() calls below would need to be modified not to access
3036 * userspace memory when called from set_ctrl().
3037 */
d9a25471 3038 if (ctrl->is_ptr)
03d5285b
LP		 3039 return -EINVAL;
3040
2a863793 3041 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3042 for (i = 0; i < master->ncontrols; i++)
3043 if (master->cluster[i])
2a863793 3044 master->cluster[i]->is_new = 0;
0996517c 3045
5626b8c7
HV		 3046 /* For autoclusters with volatiles that are switched from auto to
3047 manual mode we have to update the current volatile values since
3048 those will become the initial manual values after such a switch. */
3049 if (master->is_auto && master->has_volatiles && ctrl == master &&
03d5285b 3050 !is_cur_manual(master) && c->value == master->manual_mode_value)
5626b8c7 3051 update_from_auto_cluster(master);
03d5285b
LP		 3052
3053 user_to_new(c, ctrl);
2ccbe779
SN		 3054 return try_or_set_cluster(fh, master, true, ch_flags);
3055}
03d5285b 3056
2ccbe779
SN		 3057/* Helper function for VIDIOC_S_CTRL compatibility */
3058static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3059 struct v4l2_ext_control *c)
3060{
3061 int ret = validate_new(ctrl, c);
3062
3063 if (!ret) {
3064 v4l2_ctrl_lock(ctrl);
3065 ret = set_ctrl(fh, ctrl, c, 0);
3066 if (!ret)
3067 cur_to_user(c, ctrl);
3068 v4l2_ctrl_unlock(ctrl);
3069 }
0996517c
HV		 3070 return ret;
3071}
3072
ab892bac
HV		 3073int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3074 struct v4l2_control *control)
0996517c
HV		 3075{
3076 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 3077 struct v4l2_ext_control c;
3078 int ret;
0996517c 3079
d9a25471 3080 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3081 return -EINVAL;
3082
7ebbc39f
HV		 3083 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3084 return -EACCES;
3085
03d5285b 3086 c.value = control->value;
2ccbe779 3087 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3088 control->value = c.value;
3089 return ret;
0996517c
HV		 3090}
3091EXPORT_SYMBOL(v4l2_s_ctrl);
3092
3093int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
3094{
ab892bac 3095 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 3096}
3097EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
3098
3099int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
3100{
03d5285b
LP		 3101 struct v4l2_ext_control c;
3102
0996517c 3103 /* It's a driver bug if this happens. */
d9a25471 3104 WARN_ON(!ctrl->is_int);
03d5285b 3105 c.value = val;
2ccbe779 3106 return set_ctrl_lock(NULL, ctrl, &c);
0996517c
HV		 3107}
3108EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
6e239399 3109
03d5285b
LP		 3110int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
3111{
3112 struct v4l2_ext_control c;
3113
3114 /* It's a driver bug if this happens. */
998e7659 3115 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
03d5285b 3116 c.value64 = val;
2ccbe779 3117 return set_ctrl_lock(NULL, ctrl, &c);
03d5285b
LP		 3118}
3119EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64);
3120
8ac7a949
HV		 3121void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3122{
3123 if (ctrl == NULL)
3124 return;
3125 if (notify == NULL) {
3126 ctrl->call_notify = 0;
3127 return;
3128 }
3129 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3130 return;
3131 ctrl->handler->notify = notify;
3132 ctrl->handler->notify_priv = priv;
3133 ctrl->call_notify = 1;
3134}
3135EXPORT_SYMBOL(v4l2_ctrl_notify);
3136
2ccbe779 3137int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3138 s64 min, s64 max, u64 step, s64 def)
2ccbe779 3139{
302ab7ce 3140 int ret;
2ccbe779
SN		 3141 struct v4l2_ext_control c;
3142
3143 switch (ctrl->type) {
3144 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3145 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3146 case V4L2_CTRL_TYPE_BOOLEAN:
3147 case V4L2_CTRL_TYPE_MENU:
3148 case V4L2_CTRL_TYPE_INTEGER_MENU:
3149 case V4L2_CTRL_TYPE_BITMASK:
302ab7ce
HV		 3150 if (ctrl->is_array)
3151 return -EINVAL;
3152 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 3153 if (ret)
3154 return ret;
3155 break;
3156 default:
3157 return -EINVAL;
3158 }
3159 v4l2_ctrl_lock(ctrl);
3160 ctrl->minimum = min;
3161 ctrl->maximum = max;
3162 ctrl->step = step;
3163 ctrl->default_value = def;
2a9ec373 3164 c.value = *ctrl->p_cur.p_s32;
2ccbe779
SN		 3165 if (validate_new(ctrl, &c))
3166 c.value = def;
2a9ec373 3167 if (c.value != *ctrl->p_cur.p_s32)
2ccbe779
SN		 3168 ret = set_ctrl(NULL, ctrl, &c, V4L2_EVENT_CTRL_CH_RANGE);
3169 else
3170 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
3171 v4l2_ctrl_unlock(ctrl);
3172 return ret;
3173}
3174EXPORT_SYMBOL(v4l2_ctrl_modify_range);
3175
6e6d76cd 3176static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3177{
3e366149
HG		 3178 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3179
3180 if (ctrl == NULL)
3181 return -EINVAL;
3182
6e239399 3183 v4l2_ctrl_lock(ctrl);
77068d36 3184 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3185 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3186 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3187 struct v4l2_event ev;
c12fcfd6 3188 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3189
c12fcfd6
HV		 3190 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3191 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3192 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3193 /* Mark the queue as active, allowing this initial
3194 event to be accepted. */
3195 sev->elems = elems;
77068d36 3196 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3197 }
3198 v4l2_ctrl_unlock(ctrl);
3e366149 3199 return 0;
6e239399 3200}
6e239399 3201
3e366149 3202static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3203{
3e366149
HG		 3204 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3205
6e239399 3206 v4l2_ctrl_lock(ctrl);
77068d36 3207 list_del(&sev->node);
6e239399
HV		 3208 v4l2_ctrl_unlock(ctrl);
3209}
3e366149
HG		 3210
3211void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3212{
3213 u32 old_changes = old->u.ctrl.changes;
3214
3215 old->u.ctrl = new->u.ctrl;
3216 old->u.ctrl.changes |= old_changes;
3217}
3218EXPORT_SYMBOL(v4l2_ctrl_replace);
3219
3220void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3221{
3222 new->u.ctrl.changes |= old->u.ctrl.changes;
3223}
3224EXPORT_SYMBOL(v4l2_ctrl_merge);
3225
3226const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3227 .add = v4l2_ctrl_add_event,
3228 .del = v4l2_ctrl_del_event,
3229 .replace = v4l2_ctrl_replace,
3230 .merge = v4l2_ctrl_merge,
3231};
3232EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3233
3234int v4l2_ctrl_log_status(struct file *file, void *fh)
3235{
3236 struct video_device *vfd = video_devdata(file);
3237 struct v4l2_fh *vfh = file->private_data;
3238
3239 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3240 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3241 vfd->v4l2_dev->name);
3242 return 0;
3243}
3244EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3245
3246int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3247 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3248{
3249 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3250 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3251 return -EINVAL;
3252}
3253EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3254
22fa4279
SN		 3255int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3256 struct v4l2_event_subscription *sub)
3257{
3258 if (!sd->ctrl_handler)
3259 return -EINVAL;
3260 return v4l2_ctrl_subscribe_event(fh, sub);
3261}
3262EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3263
a26243b0
HV		 3264unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
3265{
3266 struct v4l2_fh *fh = file->private_data;
3267
3268 if (v4l2_event_pending(fh))
3269 return POLLPRI;
3270 poll_wait(file, &fh->wait, wait);
3271 return 0;
3272}
3273EXPORT_SYMBOL(v4l2_ctrl_poll);
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