Commit | Line | Data |
---|---|---|
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 |
36 | struct 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 |
48 | static 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. */ | |
55 | static 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 | 64 | const char * const *v4l2_ctrl_get_menu(u32 id) |
0996517c | 65 | { |
513521ea | 66 | static const char * const mpeg_audio_sampling_freq[] = { |
0996517c HV |
67 | "44.1 kHz", |
68 | "48 kHz", | |
69 | "32 kHz", | |
70 | NULL | |
71 | }; | |
513521ea | 72 | static const char * const mpeg_audio_encoding[] = { |
0996517c HV |
73 | "MPEG-1/2 Layer I", |
74 | "MPEG-1/2 Layer II", | |
75 | "MPEG-1/2 Layer III", | |
76 | "MPEG-2/4 AAC", | |
77 | "AC-3", | |
78 | NULL | |
79 | }; | |
513521ea | 80 | static const char * const mpeg_audio_l1_bitrate[] = { |
0996517c HV |
81 | "32 kbps", |
82 | "64 kbps", | |
83 | "96 kbps", | |
84 | "128 kbps", | |
85 | "160 kbps", | |
86 | "192 kbps", | |
87 | "224 kbps", | |
88 | "256 kbps", | |
89 | "288 kbps", | |
90 | "320 kbps", | |
91 | "352 kbps", | |
92 | "384 kbps", | |
93 | "416 kbps", | |
94 | "448 kbps", | |
95 | NULL | |
96 | }; | |
513521ea | 97 | static const char * const mpeg_audio_l2_bitrate[] = { |
0996517c HV |
98 | "32 kbps", |
99 | "48 kbps", | |
100 | "56 kbps", | |
101 | "64 kbps", | |
102 | "80 kbps", | |
103 | "96 kbps", | |
104 | "112 kbps", | |
105 | "128 kbps", | |
106 | "160 kbps", | |
107 | "192 kbps", | |
108 | "224 kbps", | |
109 | "256 kbps", | |
110 | "320 kbps", | |
111 | "384 kbps", | |
112 | NULL | |
113 | }; | |
513521ea | 114 | static const char * const mpeg_audio_l3_bitrate[] = { |
0996517c HV |
115 | "32 kbps", |
116 | "40 kbps", | |
117 | "48 kbps", | |
118 | "56 kbps", | |
119 | "64 kbps", | |
120 | "80 kbps", | |
121 | "96 kbps", | |
122 | "112 kbps", | |
123 | "128 kbps", | |
124 | "160 kbps", | |
125 | "192 kbps", | |
126 | "224 kbps", | |
127 | "256 kbps", | |
128 | "320 kbps", | |
129 | NULL | |
130 | }; | |
513521ea | 131 | static const char * const mpeg_audio_ac3_bitrate[] = { |
0996517c HV |
132 | "32 kbps", |
133 | "40 kbps", | |
134 | "48 kbps", | |
135 | "56 kbps", | |
136 | "64 kbps", | |
137 | "80 kbps", | |
138 | "96 kbps", | |
139 | "112 kbps", | |
140 | "128 kbps", | |
141 | "160 kbps", | |
142 | "192 kbps", | |
143 | "224 kbps", | |
144 | "256 kbps", | |
145 | "320 kbps", | |
146 | "384 kbps", | |
147 | "448 kbps", | |
148 | "512 kbps", | |
149 | "576 kbps", | |
150 | "640 kbps", | |
151 | NULL | |
152 | }; | |
513521ea | 153 | static const char * const mpeg_audio_mode[] = { |
0996517c HV |
154 | "Stereo", |
155 | "Joint Stereo", | |
156 | "Dual", | |
157 | "Mono", | |
158 | NULL | |
159 | }; | |
513521ea | 160 | static const char * const mpeg_audio_mode_extension[] = { |
0996517c HV |
161 | "Bound 4", |
162 | "Bound 8", | |
163 | "Bound 12", | |
164 | "Bound 16", | |
165 | NULL | |
166 | }; | |
513521ea | 167 | static const char * const mpeg_audio_emphasis[] = { |
0996517c HV |
168 | "No Emphasis", |
169 | "50/15 us", | |
170 | "CCITT J17", | |
171 | NULL | |
172 | }; | |
513521ea | 173 | static const char * const mpeg_audio_crc[] = { |
0996517c HV |
174 | "No CRC", |
175 | "16-bit CRC", | |
176 | NULL | |
177 | }; | |
24c19a21 HV |
178 | static const char * const mpeg_audio_dec_playback[] = { |
179 | "Auto", | |
180 | "Stereo", | |
181 | "Left", | |
182 | "Right", | |
183 | "Mono", | |
184 | "Swapped Stereo", | |
185 | NULL | |
186 | }; | |
513521ea | 187 | static const char * const mpeg_video_encoding[] = { |
0996517c HV |
188 | "MPEG-1", |
189 | "MPEG-2", | |
190 | "MPEG-4 AVC", | |
191 | NULL | |
192 | }; | |
513521ea | 193 | static const char * const mpeg_video_aspect[] = { |
0996517c HV |
194 | "1x1", |
195 | "4x3", | |
196 | "16x9", | |
197 | "2.21x1", | |
198 | NULL | |
199 | }; | |
513521ea | 200 | static const char * const mpeg_video_bitrate_mode[] = { |
0996517c HV |
201 | "Variable Bitrate", |
202 | "Constant Bitrate", | |
203 | NULL | |
204 | }; | |
513521ea | 205 | static const char * const mpeg_stream_type[] = { |
0996517c HV |
206 | "MPEG-2 Program Stream", |
207 | "MPEG-2 Transport Stream", | |
208 | "MPEG-1 System Stream", | |
209 | "MPEG-2 DVD-compatible Stream", | |
210 | "MPEG-1 VCD-compatible Stream", | |
211 | "MPEG-2 SVCD-compatible Stream", | |
212 | NULL | |
213 | }; | |
513521ea | 214 | static const char * const mpeg_stream_vbi_fmt[] = { |
0996517c | 215 | "No VBI", |
064f5096 | 216 | "Private Packet, IVTV Format", |
0996517c HV |
217 | NULL |
218 | }; | |
513521ea | 219 | static const char * const camera_power_line_frequency[] = { |
0996517c HV |
220 | "Disabled", |
221 | "50 Hz", | |
222 | "60 Hz", | |
d26a6635 | 223 | "Auto", |
0996517c HV |
224 | NULL |
225 | }; | |
513521ea | 226 | static const char * const camera_exposure_auto[] = { |
0996517c HV |
227 | "Auto Mode", |
228 | "Manual Mode", | |
229 | "Shutter Priority Mode", | |
230 | "Aperture Priority Mode", | |
231 | NULL | |
232 | }; | |
cf072139 SN |
233 | static const char * const camera_exposure_metering[] = { |
234 | "Average", | |
235 | "Center Weighted", | |
236 | "Spot", | |
237 | NULL | |
238 | }; | |
2272ab65 SN |
239 | static const char * const camera_auto_focus_range[] = { |
240 | "Auto", | |
241 | "Normal", | |
242 | "Macro", | |
243 | "Infinity", | |
244 | NULL | |
245 | }; | |
513521ea | 246 | static const char * const colorfx[] = { |
0996517c HV |
247 | "None", |
248 | "Black & White", | |
249 | "Sepia", | |
250 | "Negative", | |
251 | "Emboss", | |
252 | "Sketch", | |
064f5096 KD |
253 | "Sky Blue", |
254 | "Grass Green", | |
255 | "Skin Whiten", | |
0996517c | 256 | "Vivid", |
6491d1ad SN |
257 | "Aqua", |
258 | "Art Freeze", | |
259 | "Silhouette", | |
260 | "Solarization", | |
261 | "Antique", | |
262 | "Set Cb/Cr", | |
0996517c HV |
263 | NULL |
264 | }; | |
e40a0573 SN |
265 | static const char * const auto_n_preset_white_balance[] = { |
266 | "Manual", | |
267 | "Auto", | |
268 | "Incandescent", | |
269 | "Fluorescent", | |
270 | "Fluorescent H", | |
271 | "Horizon", | |
272 | "Daylight", | |
273 | "Flash", | |
274 | "Cloudy", | |
275 | "Shade", | |
276 | NULL, | |
277 | }; | |
7f84ad8b SN |
278 | static const char * const camera_iso_sensitivity_auto[] = { |
279 | "Manual", | |
280 | "Auto", | |
281 | NULL | |
282 | }; | |
0bf6b7dc SN |
283 | static const char * const scene_mode[] = { |
284 | "None", | |
285 | "Backlight", | |
286 | "Beach/Snow", | |
287 | "Candle Light", | |
288 | "Dusk/Dawn", | |
289 | "Fall Colors", | |
290 | "Fireworks", | |
291 | "Landscape", | |
292 | "Night", | |
293 | "Party/Indoor", | |
294 | "Portrait", | |
295 | "Sports", | |
296 | "Sunset", | |
297 | "Text", | |
298 | NULL | |
299 | }; | |
513521ea | 300 | static const char * const tune_preemphasis[] = { |
064f5096 | 301 | "No Preemphasis", |
f769c260 HV |
302 | "50 Microseconds", |
303 | "75 Microseconds", | |
0996517c HV |
304 | NULL, |
305 | }; | |
064f5096 KD |
306 | static const char * const header_mode[] = { |
307 | "Separate Buffer", | |
308 | "Joined With 1st Frame", | |
309 | NULL, | |
310 | }; | |
311 | static const char * const multi_slice[] = { | |
312 | "Single", | |
313 | "Max Macroblocks", | |
314 | "Max Bytes", | |
315 | NULL, | |
316 | }; | |
317 | static const char * const entropy_mode[] = { | |
318 | "CAVLC", | |
319 | "CABAC", | |
320 | NULL, | |
321 | }; | |
322 | static const char * const mpeg_h264_level[] = { | |
323 | "1", | |
324 | "1b", | |
325 | "1.1", | |
326 | "1.2", | |
327 | "1.3", | |
328 | "2", | |
329 | "2.1", | |
330 | "2.2", | |
331 | "3", | |
332 | "3.1", | |
333 | "3.2", | |
334 | "4", | |
335 | "4.1", | |
336 | "4.2", | |
337 | "5", | |
338 | "5.1", | |
339 | NULL, | |
340 | }; | |
341 | static const char * const h264_loop_filter[] = { | |
342 | "Enabled", | |
343 | "Disabled", | |
344 | "Disabled at Slice Boundary", | |
345 | NULL, | |
346 | }; | |
347 | static const char * const h264_profile[] = { | |
348 | "Baseline", | |
349 | "Constrained Baseline", | |
350 | "Main", | |
351 | "Extended", | |
352 | "High", | |
353 | "High 10", | |
354 | "High 422", | |
355 | "High 444 Predictive", | |
356 | "High 10 Intra", | |
357 | "High 422 Intra", | |
358 | "High 444 Intra", | |
359 | "CAVLC 444 Intra", | |
360 | "Scalable Baseline", | |
361 | "Scalable High", | |
362 | "Scalable High Intra", | |
363 | "Multiview High", | |
364 | NULL, | |
365 | }; | |
366 | static const char * const vui_sar_idc[] = { | |
367 | "Unspecified", | |
368 | "1:1", | |
369 | "12:11", | |
370 | "10:11", | |
371 | "16:11", | |
372 | "40:33", | |
373 | "24:11", | |
374 | "20:11", | |
375 | "32:11", | |
376 | "80:33", | |
377 | "18:11", | |
378 | "15:11", | |
379 | "64:33", | |
380 | "160:99", | |
381 | "4:3", | |
382 | "3:2", | |
383 | "2:1", | |
384 | "Extended SAR", | |
385 | NULL, | |
386 | }; | |
387 | static const char * const mpeg_mpeg4_level[] = { | |
388 | "0", | |
389 | "0b", | |
390 | "1", | |
391 | "2", | |
392 | "3", | |
393 | "3b", | |
394 | "4", | |
395 | "5", | |
396 | NULL, | |
397 | }; | |
398 | static const char * const mpeg4_profile[] = { | |
399 | "Simple", | |
f769c260 | 400 | "Advanced Simple", |
064f5096 KD |
401 | "Core", |
402 | "Simple Scalable", | |
403 | "Advanced Coding Efficency", | |
404 | NULL, | |
405 | }; | |
406 | ||
0b159acd SA |
407 | static const char * const flash_led_mode[] = { |
408 | "Off", | |
409 | "Flash", | |
410 | "Torch", | |
411 | NULL, | |
412 | }; | |
413 | static const char * const flash_strobe_source[] = { | |
414 | "Software", | |
415 | "External", | |
416 | NULL, | |
417 | }; | |
0996517c | 418 | |
c7361ae1 SN |
419 | static const char * const jpeg_chroma_subsampling[] = { |
420 | "4:4:4", | |
421 | "4:2:2", | |
422 | "4:2:0", | |
423 | "4:1:1", | |
424 | "4:1:0", | |
425 | "Gray", | |
426 | NULL, | |
427 | }; | |
428 | ||
0996517c HV |
429 | switch (id) { |
430 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: | |
431 | return mpeg_audio_sampling_freq; | |
432 | case V4L2_CID_MPEG_AUDIO_ENCODING: | |
433 | return mpeg_audio_encoding; | |
434 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: | |
435 | return mpeg_audio_l1_bitrate; | |
436 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: | |
437 | return mpeg_audio_l2_bitrate; | |
438 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: | |
439 | return mpeg_audio_l3_bitrate; | |
440 | case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: | |
441 | return mpeg_audio_ac3_bitrate; | |
442 | case V4L2_CID_MPEG_AUDIO_MODE: | |
443 | return mpeg_audio_mode; | |
444 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: | |
445 | return mpeg_audio_mode_extension; | |
446 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: | |
447 | return mpeg_audio_emphasis; | |
448 | case V4L2_CID_MPEG_AUDIO_CRC: | |
449 | return mpeg_audio_crc; | |
24c19a21 HV |
450 | case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: |
451 | case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: | |
452 | return mpeg_audio_dec_playback; | |
0996517c HV |
453 | case V4L2_CID_MPEG_VIDEO_ENCODING: |
454 | return mpeg_video_encoding; | |
455 | case V4L2_CID_MPEG_VIDEO_ASPECT: | |
456 | return mpeg_video_aspect; | |
457 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: | |
458 | return mpeg_video_bitrate_mode; | |
459 | case V4L2_CID_MPEG_STREAM_TYPE: | |
460 | return mpeg_stream_type; | |
461 | case V4L2_CID_MPEG_STREAM_VBI_FMT: | |
462 | return mpeg_stream_vbi_fmt; | |
463 | case V4L2_CID_POWER_LINE_FREQUENCY: | |
464 | return camera_power_line_frequency; | |
465 | case V4L2_CID_EXPOSURE_AUTO: | |
466 | return camera_exposure_auto; | |
cf072139 SN |
467 | case V4L2_CID_EXPOSURE_METERING: |
468 | return camera_exposure_metering; | |
2272ab65 SN |
469 | case V4L2_CID_AUTO_FOCUS_RANGE: |
470 | return camera_auto_focus_range; | |
0996517c HV |
471 | case V4L2_CID_COLORFX: |
472 | return colorfx; | |
e40a0573 SN |
473 | case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: |
474 | return auto_n_preset_white_balance; | |
7f84ad8b SN |
475 | case V4L2_CID_ISO_SENSITIVITY_AUTO: |
476 | return camera_iso_sensitivity_auto; | |
0bf6b7dc SN |
477 | case V4L2_CID_SCENE_MODE: |
478 | return scene_mode; | |
0996517c HV |
479 | case V4L2_CID_TUNE_PREEMPHASIS: |
480 | return tune_preemphasis; | |
0b159acd SA |
481 | case V4L2_CID_FLASH_LED_MODE: |
482 | return flash_led_mode; | |
483 | case V4L2_CID_FLASH_STROBE_SOURCE: | |
484 | return flash_strobe_source; | |
064f5096 KD |
485 | case V4L2_CID_MPEG_VIDEO_HEADER_MODE: |
486 | return header_mode; | |
487 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: | |
488 | return multi_slice; | |
489 | case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: | |
490 | return entropy_mode; | |
491 | case V4L2_CID_MPEG_VIDEO_H264_LEVEL: | |
492 | return mpeg_h264_level; | |
493 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: | |
494 | return h264_loop_filter; | |
495 | case V4L2_CID_MPEG_VIDEO_H264_PROFILE: | |
496 | return h264_profile; | |
497 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: | |
498 | return vui_sar_idc; | |
499 | case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: | |
500 | return mpeg_mpeg4_level; | |
501 | case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: | |
502 | return mpeg4_profile; | |
c7361ae1 SN |
503 | case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: |
504 | return jpeg_chroma_subsampling; | |
505 | ||
0996517c HV |
506 | default: |
507 | return NULL; | |
508 | } | |
509 | } | |
510 | EXPORT_SYMBOL(v4l2_ctrl_get_menu); | |
511 | ||
512 | /* Return the control name. */ | |
513 | const char *v4l2_ctrl_get_name(u32 id) | |
514 | { | |
515 | switch (id) { | |
516 | /* USER controls */ | |
6c8d6111 | 517 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
6dd5aff3 MCC |
518 | case V4L2_CID_USER_CLASS: return "User Controls"; |
519 | case V4L2_CID_BRIGHTNESS: return "Brightness"; | |
520 | case V4L2_CID_CONTRAST: return "Contrast"; | |
521 | case V4L2_CID_SATURATION: return "Saturation"; | |
522 | case V4L2_CID_HUE: return "Hue"; | |
523 | case V4L2_CID_AUDIO_VOLUME: return "Volume"; | |
524 | case V4L2_CID_AUDIO_BALANCE: return "Balance"; | |
525 | case V4L2_CID_AUDIO_BASS: return "Bass"; | |
526 | case V4L2_CID_AUDIO_TREBLE: return "Treble"; | |
527 | case V4L2_CID_AUDIO_MUTE: return "Mute"; | |
528 | case V4L2_CID_AUDIO_LOUDNESS: return "Loudness"; | |
0996517c HV |
529 | case V4L2_CID_BLACK_LEVEL: return "Black Level"; |
530 | case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic"; | |
531 | case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance"; | |
532 | case V4L2_CID_RED_BALANCE: return "Red Balance"; | |
533 | case V4L2_CID_BLUE_BALANCE: return "Blue Balance"; | |
534 | case V4L2_CID_GAMMA: return "Gamma"; | |
535 | case V4L2_CID_EXPOSURE: return "Exposure"; | |
536 | case V4L2_CID_AUTOGAIN: return "Gain, Automatic"; | |
537 | case V4L2_CID_GAIN: return "Gain"; | |
538 | case V4L2_CID_HFLIP: return "Horizontal Flip"; | |
539 | case V4L2_CID_VFLIP: return "Vertical Flip"; | |
540 | case V4L2_CID_HCENTER: return "Horizontal Center"; | |
541 | case V4L2_CID_VCENTER: return "Vertical Center"; | |
542 | case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency"; | |
543 | case V4L2_CID_HUE_AUTO: return "Hue, Automatic"; | |
544 | case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature"; | |
545 | case V4L2_CID_SHARPNESS: return "Sharpness"; | |
546 | case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation"; | |
547 | case V4L2_CID_CHROMA_AGC: return "Chroma AGC"; | |
0996517c HV |
548 | case V4L2_CID_COLOR_KILLER: return "Color Killer"; |
549 | case V4L2_CID_COLORFX: return "Color Effects"; | |
550 | case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic"; | |
551 | case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter"; | |
552 | case V4L2_CID_ROTATE: return "Rotate"; | |
553 | case V4L2_CID_BG_COLOR: return "Background Color"; | |
6c8d6111 | 554 | case V4L2_CID_CHROMA_GAIN: return "Chroma Gain"; |
008d35f2 JFM |
555 | case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1"; |
556 | case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2"; | |
f08aacf8 HV |
557 | case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers"; |
558 | case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers"; | |
cc1d3272 | 559 | case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component"; |
6491d1ad | 560 | case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr"; |
0996517c HV |
561 | |
562 | /* MPEG controls */ | |
6c8d6111 | 563 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
6dd5aff3 MCC |
564 | case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls"; |
565 | case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type"; | |
566 | case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID"; | |
567 | case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID"; | |
568 | case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID"; | |
569 | case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID"; | |
6c8d6111 HV |
570 | case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID"; |
571 | case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID"; | |
572 | case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format"; | |
0996517c | 573 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency"; |
6dd5aff3 MCC |
574 | case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding"; |
575 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate"; | |
576 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate"; | |
577 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate"; | |
578 | case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode"; | |
0996517c | 579 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension"; |
6dd5aff3 MCC |
580 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis"; |
581 | case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC"; | |
582 | case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute"; | |
583 | case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate"; | |
584 | case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate"; | |
24c19a21 HV |
585 | case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback"; |
586 | case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback"; | |
6dd5aff3 MCC |
587 | case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding"; |
588 | case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect"; | |
589 | case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames"; | |
590 | case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size"; | |
591 | case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure"; | |
592 | case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown"; | |
593 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode"; | |
594 | case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate"; | |
595 | case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate"; | |
0996517c | 596 | case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation"; |
6dd5aff3 | 597 | case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute"; |
0996517c | 598 | case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV"; |
064f5096 KD |
599 | case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface"; |
600 | case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable"; | |
f08aacf8 | 601 | case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs"; |
064f5096 KD |
602 | case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable"; |
603 | case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control"; | |
604 | case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode"; | |
f08aacf8 | 605 | case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics"; |
064f5096 | 606 | case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value"; |
f08aacf8 HV |
607 | case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value"; |
608 | case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value"; | |
064f5096 KD |
609 | case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value"; |
610 | case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value"; | |
611 | case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value"; | |
f08aacf8 HV |
612 | case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value"; |
613 | case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value"; | |
064f5096 KD |
614 | case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value"; |
615 | case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value"; | |
616 | case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable"; | |
617 | case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size"; | |
f08aacf8 HV |
618 | case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode"; |
619 | case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period"; | |
064f5096 KD |
620 | case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level"; |
621 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset"; | |
622 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset"; | |
623 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode"; | |
624 | case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile"; | |
625 | case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR"; | |
626 | case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR"; | |
627 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable"; | |
628 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC"; | |
629 | case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value"; | |
f08aacf8 HV |
630 | case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value"; |
631 | case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value"; | |
064f5096 KD |
632 | case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value"; |
633 | case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value"; | |
634 | case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level"; | |
635 | case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile"; | |
636 | case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable"; | |
f08aacf8 HV |
637 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice"; |
638 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice"; | |
639 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method"; | |
064f5096 | 640 | case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size"; |
24c19a21 HV |
641 | case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS"; |
642 | case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count"; | |
0996517c HV |
643 | |
644 | /* CAMERA controls */ | |
6c8d6111 | 645 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
0996517c HV |
646 | case V4L2_CID_CAMERA_CLASS: return "Camera Controls"; |
647 | case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure"; | |
648 | case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute"; | |
649 | case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate"; | |
650 | case V4L2_CID_PAN_RELATIVE: return "Pan, Relative"; | |
651 | case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative"; | |
652 | case V4L2_CID_PAN_RESET: return "Pan, Reset"; | |
653 | case V4L2_CID_TILT_RESET: return "Tilt, Reset"; | |
654 | case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute"; | |
655 | case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute"; | |
656 | case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute"; | |
657 | case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative"; | |
2272ab65 | 658 | case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous"; |
0996517c HV |
659 | case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute"; |
660 | case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative"; | |
661 | case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous"; | |
662 | case V4L2_CID_PRIVACY: return "Privacy"; | |
6c8d6111 HV |
663 | case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute"; |
664 | case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative"; | |
d58083c9 | 665 | case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias"; |
e40a0573 | 666 | case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset"; |
44d44a1a | 667 | case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range"; |
82b3056c | 668 | case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization"; |
7f84ad8b SN |
669 | case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity"; |
670 | case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto"; | |
cf072139 | 671 | case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode"; |
0bf6b7dc | 672 | case V4L2_CID_SCENE_MODE: return "Scene Mode"; |
fc162a09 | 673 | case V4L2_CID_3A_LOCK: return "3A Lock"; |
2272ab65 SN |
674 | case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start"; |
675 | case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop"; | |
676 | case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status"; | |
677 | case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range"; | |
0996517c HV |
678 | |
679 | /* FM Radio Modulator control */ | |
6c8d6111 | 680 | /* Keep the order of the 'case's the same as in videodev2.h! */ |
0996517c HV |
681 | case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls"; |
682 | case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation"; | |
683 | case V4L2_CID_RDS_TX_PI: return "RDS Program ID"; | |
684 | case V4L2_CID_RDS_TX_PTY: return "RDS Program Type"; | |
685 | case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name"; | |
686 | case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text"; | |
687 | case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled"; | |
688 | case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time"; | |
689 | case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation"; | |
f08aacf8 | 690 | case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled"; |
0996517c HV |
691 | case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain"; |
692 | case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold"; | |
693 | case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time"; | |
694 | case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time"; | |
695 | case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled"; | |
696 | case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation"; | |
697 | case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency"; | |
f08aacf8 | 698 | case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis"; |
0996517c HV |
699 | case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level"; |
700 | case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor"; | |
701 | ||
0b159acd | 702 | /* Flash controls */ |
f08aacf8 HV |
703 | case V4L2_CID_FLASH_CLASS: return "Flash Controls"; |
704 | case V4L2_CID_FLASH_LED_MODE: return "LED Mode"; | |
705 | case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source"; | |
0b159acd | 706 | case V4L2_CID_FLASH_STROBE: return "Strobe"; |
f08aacf8 HV |
707 | case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe"; |
708 | case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status"; | |
709 | case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout"; | |
710 | case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode"; | |
711 | case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode"; | |
712 | case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator"; | |
0b159acd SA |
713 | case V4L2_CID_FLASH_FAULT: return "Faults"; |
714 | case V4L2_CID_FLASH_CHARGE: return "Charge"; | |
f08aacf8 | 715 | case V4L2_CID_FLASH_READY: return "Ready to Strobe"; |
0b159acd | 716 | |
c7361ae1 SN |
717 | /* JPEG encoder controls */ |
718 | /* Keep the order of the 'case's the same as in videodev2.h! */ | |
719 | case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls"; | |
720 | case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling"; | |
721 | case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval"; | |
722 | case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality"; | |
723 | case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers"; | |
724 | ||
8c9d236e SA |
725 | /* Image source controls */ |
726 | case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls"; | |
727 | case V4L2_CID_VBLANK: return "Vertical Blanking"; | |
728 | case V4L2_CID_HBLANK: return "Horizontal Blanking"; | |
729 | case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain"; | |
730 | ||
c643ee13 SA |
731 | /* Image processing controls */ |
732 | case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls"; | |
733 | case V4L2_CID_LINK_FREQ: return "Link Frequency"; | |
734 | case V4L2_CID_PIXEL_RATE: return "Pixel Rate"; | |
735 | ||
0996517c HV |
736 | default: |
737 | return NULL; | |
738 | } | |
739 | } | |
740 | EXPORT_SYMBOL(v4l2_ctrl_get_name); | |
741 | ||
742 | void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type, | |
743 | s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags) | |
744 | { | |
745 | *name = v4l2_ctrl_get_name(id); | |
746 | *flags = 0; | |
747 | ||
748 | switch (id) { | |
749 | case V4L2_CID_AUDIO_MUTE: | |
750 | case V4L2_CID_AUDIO_LOUDNESS: | |
751 | case V4L2_CID_AUTO_WHITE_BALANCE: | |
752 | case V4L2_CID_AUTOGAIN: | |
753 | case V4L2_CID_HFLIP: | |
754 | case V4L2_CID_VFLIP: | |
755 | case V4L2_CID_HUE_AUTO: | |
756 | case V4L2_CID_CHROMA_AGC: | |
757 | case V4L2_CID_COLOR_KILLER: | |
a2f8b84f | 758 | case V4L2_CID_AUTOBRIGHTNESS: |
0996517c HV |
759 | case V4L2_CID_MPEG_AUDIO_MUTE: |
760 | case V4L2_CID_MPEG_VIDEO_MUTE: | |
761 | case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: | |
762 | case V4L2_CID_MPEG_VIDEO_PULLDOWN: | |
763 | case V4L2_CID_EXPOSURE_AUTO_PRIORITY: | |
764 | case V4L2_CID_FOCUS_AUTO: | |
765 | case V4L2_CID_PRIVACY: | |
766 | case V4L2_CID_AUDIO_LIMITER_ENABLED: | |
767 | case V4L2_CID_AUDIO_COMPRESSION_ENABLED: | |
768 | case V4L2_CID_PILOT_TONE_ENABLED: | |
008d35f2 JFM |
769 | case V4L2_CID_ILLUMINATORS_1: |
770 | case V4L2_CID_ILLUMINATORS_2: | |
0b159acd SA |
771 | case V4L2_CID_FLASH_STROBE_STATUS: |
772 | case V4L2_CID_FLASH_CHARGE: | |
773 | case V4L2_CID_FLASH_READY: | |
064f5096 KD |
774 | case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: |
775 | case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: | |
776 | case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: | |
777 | case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: | |
778 | case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: | |
779 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: | |
780 | case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: | |
44d44a1a | 781 | case V4L2_CID_WIDE_DYNAMIC_RANGE: |
82b3056c | 782 | case V4L2_CID_IMAGE_STABILIZATION: |
0996517c HV |
783 | *type = V4L2_CTRL_TYPE_BOOLEAN; |
784 | *min = 0; | |
785 | *max = *step = 1; | |
786 | break; | |
787 | case V4L2_CID_PAN_RESET: | |
788 | case V4L2_CID_TILT_RESET: | |
0b159acd SA |
789 | case V4L2_CID_FLASH_STROBE: |
790 | case V4L2_CID_FLASH_STROBE_STOP: | |
2272ab65 SN |
791 | case V4L2_CID_AUTO_FOCUS_START: |
792 | case V4L2_CID_AUTO_FOCUS_STOP: | |
0996517c HV |
793 | *type = V4L2_CTRL_TYPE_BUTTON; |
794 | *flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
795 | *min = *max = *step = *def = 0; | |
796 | break; | |
797 | case V4L2_CID_POWER_LINE_FREQUENCY: | |
798 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: | |
799 | case V4L2_CID_MPEG_AUDIO_ENCODING: | |
800 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: | |
801 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: | |
802 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: | |
803 | case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: | |
804 | case V4L2_CID_MPEG_AUDIO_MODE: | |
805 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: | |
806 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: | |
807 | case V4L2_CID_MPEG_AUDIO_CRC: | |
24c19a21 HV |
808 | case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: |
809 | case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: | |
0996517c HV |
810 | case V4L2_CID_MPEG_VIDEO_ENCODING: |
811 | case V4L2_CID_MPEG_VIDEO_ASPECT: | |
812 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: | |
813 | case V4L2_CID_MPEG_STREAM_TYPE: | |
814 | case V4L2_CID_MPEG_STREAM_VBI_FMT: | |
815 | case V4L2_CID_EXPOSURE_AUTO: | |
2272ab65 | 816 | case V4L2_CID_AUTO_FOCUS_RANGE: |
0996517c | 817 | case V4L2_CID_COLORFX: |
e40a0573 | 818 | case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: |
0996517c | 819 | case V4L2_CID_TUNE_PREEMPHASIS: |
0b159acd SA |
820 | case V4L2_CID_FLASH_LED_MODE: |
821 | case V4L2_CID_FLASH_STROBE_SOURCE: | |
064f5096 KD |
822 | case V4L2_CID_MPEG_VIDEO_HEADER_MODE: |
823 | case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: | |
824 | case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: | |
825 | case V4L2_CID_MPEG_VIDEO_H264_LEVEL: | |
826 | case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: | |
827 | case V4L2_CID_MPEG_VIDEO_H264_PROFILE: | |
828 | case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: | |
829 | case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: | |
830 | case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: | |
c7361ae1 | 831 | case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: |
7f84ad8b | 832 | case V4L2_CID_ISO_SENSITIVITY_AUTO: |
cf072139 | 833 | case V4L2_CID_EXPOSURE_METERING: |
0bf6b7dc | 834 | case V4L2_CID_SCENE_MODE: |
0996517c HV |
835 | *type = V4L2_CTRL_TYPE_MENU; |
836 | break; | |
c643ee13 SA |
837 | case V4L2_CID_LINK_FREQ: |
838 | *type = V4L2_CTRL_TYPE_INTEGER_MENU; | |
839 | break; | |
0996517c HV |
840 | case V4L2_CID_RDS_TX_PS_NAME: |
841 | case V4L2_CID_RDS_TX_RADIO_TEXT: | |
842 | *type = V4L2_CTRL_TYPE_STRING; | |
843 | break; | |
7f84ad8b | 844 | case V4L2_CID_ISO_SENSITIVITY: |
d58083c9 SN |
845 | case V4L2_CID_AUTO_EXPOSURE_BIAS: |
846 | *type = V4L2_CTRL_TYPE_INTEGER_MENU; | |
847 | break; | |
0996517c HV |
848 | case V4L2_CID_USER_CLASS: |
849 | case V4L2_CID_CAMERA_CLASS: | |
850 | case V4L2_CID_MPEG_CLASS: | |
851 | case V4L2_CID_FM_TX_CLASS: | |
0b159acd | 852 | case V4L2_CID_FLASH_CLASS: |
c7361ae1 | 853 | case V4L2_CID_JPEG_CLASS: |
8c9d236e | 854 | case V4L2_CID_IMAGE_SOURCE_CLASS: |
c643ee13 | 855 | case V4L2_CID_IMAGE_PROC_CLASS: |
0996517c HV |
856 | *type = V4L2_CTRL_TYPE_CTRL_CLASS; |
857 | /* You can neither read not write these */ | |
858 | *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY; | |
859 | *min = *max = *step = *def = 0; | |
860 | break; | |
861 | case V4L2_CID_BG_COLOR: | |
862 | *type = V4L2_CTRL_TYPE_INTEGER; | |
863 | *step = 1; | |
864 | *min = 0; | |
865 | /* Max is calculated as RGB888 that is 2^24 */ | |
866 | *max = 0xFFFFFF; | |
867 | break; | |
0b159acd | 868 | case V4L2_CID_FLASH_FAULT: |
c7361ae1 | 869 | case V4L2_CID_JPEG_ACTIVE_MARKER: |
fc162a09 | 870 | case V4L2_CID_3A_LOCK: |
2272ab65 | 871 | case V4L2_CID_AUTO_FOCUS_STATUS: |
0b159acd SA |
872 | *type = V4L2_CTRL_TYPE_BITMASK; |
873 | break; | |
064f5096 KD |
874 | case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: |
875 | case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: | |
876 | *type = V4L2_CTRL_TYPE_INTEGER; | |
877 | *flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
878 | break; | |
24c19a21 HV |
879 | case V4L2_CID_MPEG_VIDEO_DEC_FRAME: |
880 | case V4L2_CID_MPEG_VIDEO_DEC_PTS: | |
c643ee13 SA |
881 | *flags |= V4L2_CTRL_FLAG_VOLATILE; |
882 | /* Fall through */ | |
883 | case V4L2_CID_PIXEL_RATE: | |
24c19a21 | 884 | *type = V4L2_CTRL_TYPE_INTEGER64; |
c643ee13 | 885 | *flags |= V4L2_CTRL_FLAG_READ_ONLY; |
ca576811 | 886 | *min = *max = *step = *def = 0; |
24c19a21 | 887 | break; |
0996517c HV |
888 | default: |
889 | *type = V4L2_CTRL_TYPE_INTEGER; | |
890 | break; | |
891 | } | |
892 | switch (id) { | |
893 | case V4L2_CID_MPEG_AUDIO_ENCODING: | |
894 | case V4L2_CID_MPEG_AUDIO_MODE: | |
895 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: | |
896 | case V4L2_CID_MPEG_VIDEO_B_FRAMES: | |
897 | case V4L2_CID_MPEG_STREAM_TYPE: | |
898 | *flags |= V4L2_CTRL_FLAG_UPDATE; | |
899 | break; | |
900 | case V4L2_CID_AUDIO_VOLUME: | |
901 | case V4L2_CID_AUDIO_BALANCE: | |
902 | case V4L2_CID_AUDIO_BASS: | |
903 | case V4L2_CID_AUDIO_TREBLE: | |
904 | case V4L2_CID_BRIGHTNESS: | |
905 | case V4L2_CID_CONTRAST: | |
906 | case V4L2_CID_SATURATION: | |
907 | case V4L2_CID_HUE: | |
908 | case V4L2_CID_RED_BALANCE: | |
909 | case V4L2_CID_BLUE_BALANCE: | |
910 | case V4L2_CID_GAMMA: | |
911 | case V4L2_CID_SHARPNESS: | |
912 | case V4L2_CID_CHROMA_GAIN: | |
913 | case V4L2_CID_RDS_TX_DEVIATION: | |
914 | case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: | |
915 | case V4L2_CID_AUDIO_LIMITER_DEVIATION: | |
916 | case V4L2_CID_AUDIO_COMPRESSION_GAIN: | |
917 | case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: | |
918 | case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: | |
919 | case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: | |
920 | case V4L2_CID_PILOT_TONE_DEVIATION: | |
921 | case V4L2_CID_PILOT_TONE_FREQUENCY: | |
922 | case V4L2_CID_TUNE_POWER_LEVEL: | |
923 | case V4L2_CID_TUNE_ANTENNA_CAPACITOR: | |
924 | *flags |= V4L2_CTRL_FLAG_SLIDER; | |
925 | break; | |
926 | case V4L2_CID_PAN_RELATIVE: | |
927 | case V4L2_CID_TILT_RELATIVE: | |
928 | case V4L2_CID_FOCUS_RELATIVE: | |
929 | case V4L2_CID_IRIS_RELATIVE: | |
930 | case V4L2_CID_ZOOM_RELATIVE: | |
931 | *flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
932 | break; | |
0b159acd | 933 | case V4L2_CID_FLASH_STROBE_STATUS: |
2272ab65 | 934 | case V4L2_CID_AUTO_FOCUS_STATUS: |
0b159acd SA |
935 | case V4L2_CID_FLASH_READY: |
936 | *flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
937 | break; | |
0996517c HV |
938 | } |
939 | } | |
940 | EXPORT_SYMBOL(v4l2_ctrl_fill); | |
941 | ||
942 | /* Helper function to determine whether the control type is compatible with | |
943 | VIDIOC_G/S_CTRL. */ | |
944 | static bool type_is_int(const struct v4l2_ctrl *ctrl) | |
945 | { | |
946 | switch (ctrl->type) { | |
947 | case V4L2_CTRL_TYPE_INTEGER64: | |
948 | case V4L2_CTRL_TYPE_STRING: | |
949 | /* Nope, these need v4l2_ext_control */ | |
950 | return false; | |
951 | default: | |
952 | return true; | |
953 | } | |
954 | } | |
955 | ||
6e239399 HV |
956 | static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes) |
957 | { | |
958 | memset(ev->reserved, 0, sizeof(ev->reserved)); | |
959 | ev->type = V4L2_EVENT_CTRL; | |
960 | ev->id = ctrl->id; | |
961 | ev->u.ctrl.changes = changes; | |
962 | ev->u.ctrl.type = ctrl->type; | |
963 | ev->u.ctrl.flags = ctrl->flags; | |
964 | if (ctrl->type == V4L2_CTRL_TYPE_STRING) | |
965 | ev->u.ctrl.value64 = 0; | |
966 | else | |
967 | ev->u.ctrl.value64 = ctrl->cur.val64; | |
968 | ev->u.ctrl.minimum = ctrl->minimum; | |
969 | ev->u.ctrl.maximum = ctrl->maximum; | |
ce580fe5 SA |
970 | if (ctrl->type == V4L2_CTRL_TYPE_MENU |
971 | || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU) | |
6e239399 HV |
972 | ev->u.ctrl.step = 1; |
973 | else | |
974 | ev->u.ctrl.step = ctrl->step; | |
975 | ev->u.ctrl.default_value = ctrl->default_value; | |
976 | } | |
977 | ||
978 | static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes) | |
979 | { | |
980 | struct v4l2_event ev; | |
77068d36 | 981 | struct v4l2_subscribed_event *sev; |
6e239399 | 982 | |
77068d36 | 983 | if (list_empty(&ctrl->ev_subs)) |
3f66f0ed | 984 | return; |
6e239399 HV |
985 | fill_event(&ev, ctrl, changes); |
986 | ||
77068d36 | 987 | list_for_each_entry(sev, &ctrl->ev_subs, node) |
e3e72f39 HG |
988 | if (sev->fh != fh || |
989 | (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK)) | |
77068d36 | 990 | v4l2_event_queue_fh(sev->fh, &ev); |
6e239399 HV |
991 | } |
992 | ||
0996517c HV |
993 | /* Helper function: copy the current control value back to the caller */ |
994 | static int cur_to_user(struct v4l2_ext_control *c, | |
995 | struct v4l2_ctrl *ctrl) | |
996 | { | |
997 | u32 len; | |
998 | ||
999 | switch (ctrl->type) { | |
1000 | case V4L2_CTRL_TYPE_STRING: | |
1001 | len = strlen(ctrl->cur.string); | |
1002 | if (c->size < len + 1) { | |
1003 | c->size = len + 1; | |
1004 | return -ENOSPC; | |
1005 | } | |
1006 | return copy_to_user(c->string, ctrl->cur.string, | |
1007 | len + 1) ? -EFAULT : 0; | |
1008 | case V4L2_CTRL_TYPE_INTEGER64: | |
1009 | c->value64 = ctrl->cur.val64; | |
1010 | break; | |
1011 | default: | |
1012 | c->value = ctrl->cur.val; | |
1013 | break; | |
1014 | } | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1018 | /* Helper function: copy the caller-provider value as the new control value */ | |
1019 | static int user_to_new(struct v4l2_ext_control *c, | |
1020 | struct v4l2_ctrl *ctrl) | |
1021 | { | |
1022 | int ret; | |
1023 | u32 size; | |
1024 | ||
2a863793 | 1025 | ctrl->is_new = 1; |
0996517c HV |
1026 | switch (ctrl->type) { |
1027 | case V4L2_CTRL_TYPE_INTEGER64: | |
1028 | ctrl->val64 = c->value64; | |
1029 | break; | |
1030 | case V4L2_CTRL_TYPE_STRING: | |
1031 | size = c->size; | |
1032 | if (size == 0) | |
1033 | return -ERANGE; | |
1034 | if (size > ctrl->maximum + 1) | |
1035 | size = ctrl->maximum + 1; | |
1036 | ret = copy_from_user(ctrl->string, c->string, size); | |
1037 | if (!ret) { | |
1038 | char last = ctrl->string[size - 1]; | |
1039 | ||
1040 | ctrl->string[size - 1] = 0; | |
1041 | /* If the string was longer than ctrl->maximum, | |
1042 | then return an error. */ | |
1043 | if (strlen(ctrl->string) == ctrl->maximum && last) | |
1044 | return -ERANGE; | |
1045 | } | |
1046 | return ret ? -EFAULT : 0; | |
1047 | default: | |
1048 | ctrl->val = c->value; | |
1049 | break; | |
1050 | } | |
1051 | return 0; | |
1052 | } | |
1053 | ||
1054 | /* Helper function: copy the new control value back to the caller */ | |
1055 | static int new_to_user(struct v4l2_ext_control *c, | |
1056 | struct v4l2_ctrl *ctrl) | |
1057 | { | |
1058 | u32 len; | |
1059 | ||
1060 | switch (ctrl->type) { | |
1061 | case V4L2_CTRL_TYPE_STRING: | |
1062 | len = strlen(ctrl->string); | |
1063 | if (c->size < len + 1) { | |
1064 | c->size = ctrl->maximum + 1; | |
1065 | return -ENOSPC; | |
1066 | } | |
1067 | return copy_to_user(c->string, ctrl->string, | |
1068 | len + 1) ? -EFAULT : 0; | |
1069 | case V4L2_CTRL_TYPE_INTEGER64: | |
1070 | c->value64 = ctrl->val64; | |
1071 | break; | |
1072 | default: | |
1073 | c->value = ctrl->val; | |
1074 | break; | |
1075 | } | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | /* Copy the new value to the current value. */ | |
ab892bac HV |
1080 | static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, |
1081 | bool update_inactive) | |
0996517c | 1082 | { |
6e239399 HV |
1083 | bool changed = false; |
1084 | ||
0996517c HV |
1085 | if (ctrl == NULL) |
1086 | return; | |
1087 | switch (ctrl->type) { | |
6e239399 HV |
1088 | case V4L2_CTRL_TYPE_BUTTON: |
1089 | changed = true; | |
1090 | break; | |
0996517c HV |
1091 | case V4L2_CTRL_TYPE_STRING: |
1092 | /* strings are always 0-terminated */ | |
6e239399 | 1093 | changed = strcmp(ctrl->string, ctrl->cur.string); |
0996517c HV |
1094 | strcpy(ctrl->cur.string, ctrl->string); |
1095 | break; | |
1096 | case V4L2_CTRL_TYPE_INTEGER64: | |
6e239399 | 1097 | changed = ctrl->val64 != ctrl->cur.val64; |
0996517c HV |
1098 | ctrl->cur.val64 = ctrl->val64; |
1099 | break; | |
1100 | default: | |
6e239399 | 1101 | changed = ctrl->val != ctrl->cur.val; |
0996517c HV |
1102 | ctrl->cur.val = ctrl->val; |
1103 | break; | |
1104 | } | |
72d877ca | 1105 | if (update_inactive) { |
5626b8c7 HV |
1106 | /* Note: update_inactive can only be true for auto clusters. */ |
1107 | ctrl->flags &= | |
1108 | ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE); | |
1109 | if (!is_cur_manual(ctrl->cluster[0])) { | |
72d877ca | 1110 | ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; |
5626b8c7 HV |
1111 | if (ctrl->cluster[0]->has_volatiles) |
1112 | ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE; | |
1113 | } | |
1249a3a8 | 1114 | fh = NULL; |
72d877ca | 1115 | } |
639884a6 HV |
1116 | if (changed || update_inactive) { |
1117 | /* If a control was changed that was not one of the controls | |
1118 | modified by the application, then send the event to all. */ | |
1119 | if (!ctrl->is_new) | |
1120 | fh = NULL; | |
6e239399 HV |
1121 | send_event(fh, ctrl, |
1122 | (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | | |
1123 | (update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0)); | |
639884a6 | 1124 | } |
0996517c HV |
1125 | } |
1126 | ||
1127 | /* Copy the current value to the new value */ | |
1128 | static void cur_to_new(struct v4l2_ctrl *ctrl) | |
1129 | { | |
1130 | if (ctrl == NULL) | |
1131 | return; | |
1132 | switch (ctrl->type) { | |
1133 | case V4L2_CTRL_TYPE_STRING: | |
1134 | /* strings are always 0-terminated */ | |
1135 | strcpy(ctrl->string, ctrl->cur.string); | |
1136 | break; | |
1137 | case V4L2_CTRL_TYPE_INTEGER64: | |
1138 | ctrl->val64 = ctrl->cur.val64; | |
1139 | break; | |
1140 | default: | |
1141 | ctrl->val = ctrl->cur.val; | |
1142 | break; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | /* Return non-zero if one or more of the controls in the cluster has a new | |
1147 | value that differs from the current value. */ | |
1148 | static int cluster_changed(struct v4l2_ctrl *master) | |
1149 | { | |
1150 | int diff = 0; | |
1151 | int i; | |
1152 | ||
1153 | for (i = 0; !diff && i < master->ncontrols; i++) { | |
1154 | struct v4l2_ctrl *ctrl = master->cluster[i]; | |
1155 | ||
1156 | if (ctrl == NULL) | |
1157 | continue; | |
1158 | switch (ctrl->type) { | |
1159 | case V4L2_CTRL_TYPE_BUTTON: | |
1160 | /* Button controls are always 'different' */ | |
1161 | return 1; | |
1162 | case V4L2_CTRL_TYPE_STRING: | |
1163 | /* strings are always 0-terminated */ | |
1164 | diff = strcmp(ctrl->string, ctrl->cur.string); | |
1165 | break; | |
1166 | case V4L2_CTRL_TYPE_INTEGER64: | |
1167 | diff = ctrl->val64 != ctrl->cur.val64; | |
1168 | break; | |
1169 | default: | |
1170 | diff = ctrl->val != ctrl->cur.val; | |
1171 | break; | |
1172 | } | |
1173 | } | |
1174 | return diff; | |
1175 | } | |
1176 | ||
eb5b16ef HV |
1177 | /* Validate integer-type control */ |
1178 | static int validate_new_int(const struct v4l2_ctrl *ctrl, s32 *pval) | |
0996517c | 1179 | { |
eb5b16ef | 1180 | s32 val = *pval; |
0996517c | 1181 | u32 offset; |
0996517c HV |
1182 | |
1183 | switch (ctrl->type) { | |
1184 | case V4L2_CTRL_TYPE_INTEGER: | |
1185 | /* Round towards the closest legal value */ | |
1186 | val += ctrl->step / 2; | |
1187 | if (val < ctrl->minimum) | |
1188 | val = ctrl->minimum; | |
1189 | if (val > ctrl->maximum) | |
1190 | val = ctrl->maximum; | |
1191 | offset = val - ctrl->minimum; | |
1192 | offset = ctrl->step * (offset / ctrl->step); | |
1193 | val = ctrl->minimum + offset; | |
eb5b16ef | 1194 | *pval = val; |
0996517c HV |
1195 | return 0; |
1196 | ||
1197 | case V4L2_CTRL_TYPE_BOOLEAN: | |
eb5b16ef | 1198 | *pval = !!val; |
0996517c HV |
1199 | return 0; |
1200 | ||
1201 | case V4L2_CTRL_TYPE_MENU: | |
ce580fe5 | 1202 | case V4L2_CTRL_TYPE_INTEGER_MENU: |
0996517c HV |
1203 | if (val < ctrl->minimum || val > ctrl->maximum) |
1204 | return -ERANGE; | |
ce580fe5 SA |
1205 | if (ctrl->menu_skip_mask & (1 << val)) |
1206 | return -EINVAL; | |
1207 | if (ctrl->type == V4L2_CTRL_TYPE_MENU && | |
1208 | ctrl->qmenu[val][0] == '\0') | |
0996517c HV |
1209 | return -EINVAL; |
1210 | return 0; | |
1211 | ||
fa4d7096 HV |
1212 | case V4L2_CTRL_TYPE_BITMASK: |
1213 | *pval &= ctrl->maximum; | |
1214 | return 0; | |
1215 | ||
0996517c HV |
1216 | case V4L2_CTRL_TYPE_BUTTON: |
1217 | case V4L2_CTRL_TYPE_CTRL_CLASS: | |
eb5b16ef | 1218 | *pval = 0; |
0996517c HV |
1219 | return 0; |
1220 | ||
eb5b16ef HV |
1221 | default: |
1222 | return -EINVAL; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | /* Validate a new control */ | |
1227 | static int validate_new(const struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c) | |
1228 | { | |
1229 | char *s = c->string; | |
1230 | size_t len; | |
1231 | ||
1232 | switch (ctrl->type) { | |
1233 | case V4L2_CTRL_TYPE_INTEGER: | |
1234 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1235 | case V4L2_CTRL_TYPE_MENU: | |
ce580fe5 | 1236 | case V4L2_CTRL_TYPE_INTEGER_MENU: |
fa4d7096 | 1237 | case V4L2_CTRL_TYPE_BITMASK: |
eb5b16ef HV |
1238 | case V4L2_CTRL_TYPE_BUTTON: |
1239 | case V4L2_CTRL_TYPE_CTRL_CLASS: | |
1240 | return validate_new_int(ctrl, &c->value); | |
1241 | ||
0996517c HV |
1242 | case V4L2_CTRL_TYPE_INTEGER64: |
1243 | return 0; | |
1244 | ||
1245 | case V4L2_CTRL_TYPE_STRING: | |
1246 | len = strlen(s); | |
1247 | if (len < ctrl->minimum) | |
1248 | return -ERANGE; | |
1249 | if ((len - ctrl->minimum) % ctrl->step) | |
1250 | return -ERANGE; | |
1251 | return 0; | |
1252 | ||
1253 | default: | |
1254 | return -EINVAL; | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | static inline u32 node2id(struct list_head *node) | |
1259 | { | |
1260 | return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id; | |
1261 | } | |
1262 | ||
1263 | /* Set the handler's error code if it wasn't set earlier already */ | |
1264 | static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err) | |
1265 | { | |
1266 | if (hdl->error == 0) | |
1267 | hdl->error = err; | |
1268 | return err; | |
1269 | } | |
1270 | ||
1271 | /* Initialize the handler */ | |
1272 | int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl, | |
1273 | unsigned nr_of_controls_hint) | |
1274 | { | |
77e7c4e6 SA |
1275 | hdl->lock = &hdl->_lock; |
1276 | mutex_init(hdl->lock); | |
0996517c HV |
1277 | INIT_LIST_HEAD(&hdl->ctrls); |
1278 | INIT_LIST_HEAD(&hdl->ctrl_refs); | |
1279 | hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8; | |
9884d7be TM |
1280 | hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]), |
1281 | GFP_KERNEL); | |
0996517c HV |
1282 | hdl->error = hdl->buckets ? 0 : -ENOMEM; |
1283 | return hdl->error; | |
1284 | } | |
1285 | EXPORT_SYMBOL(v4l2_ctrl_handler_init); | |
1286 | ||
1287 | /* Free all controls and control refs */ | |
1288 | void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl) | |
1289 | { | |
1290 | struct v4l2_ctrl_ref *ref, *next_ref; | |
1291 | struct v4l2_ctrl *ctrl, *next_ctrl; | |
77068d36 | 1292 | struct v4l2_subscribed_event *sev, *next_sev; |
0996517c HV |
1293 | |
1294 | if (hdl == NULL || hdl->buckets == NULL) | |
1295 | return; | |
1296 | ||
77e7c4e6 | 1297 | mutex_lock(hdl->lock); |
0996517c HV |
1298 | /* Free all nodes */ |
1299 | list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) { | |
1300 | list_del(&ref->node); | |
1301 | kfree(ref); | |
1302 | } | |
1303 | /* Free all controls owned by the handler */ | |
1304 | list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) { | |
1305 | list_del(&ctrl->node); | |
77068d36 HV |
1306 | list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node) |
1307 | list_del(&sev->node); | |
0996517c HV |
1308 | kfree(ctrl); |
1309 | } | |
1310 | kfree(hdl->buckets); | |
1311 | hdl->buckets = NULL; | |
1312 | hdl->cached = NULL; | |
1313 | hdl->error = 0; | |
77e7c4e6 | 1314 | mutex_unlock(hdl->lock); |
0996517c HV |
1315 | } |
1316 | EXPORT_SYMBOL(v4l2_ctrl_handler_free); | |
1317 | ||
1318 | /* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer | |
1319 | be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing | |
1320 | with applications that do not use the NEXT_CTRL flag. | |
1321 | ||
1322 | We just find the n-th private user control. It's O(N), but that should not | |
1323 | be an issue in this particular case. */ | |
1324 | static struct v4l2_ctrl_ref *find_private_ref( | |
1325 | struct v4l2_ctrl_handler *hdl, u32 id) | |
1326 | { | |
1327 | struct v4l2_ctrl_ref *ref; | |
1328 | ||
1329 | id -= V4L2_CID_PRIVATE_BASE; | |
1330 | list_for_each_entry(ref, &hdl->ctrl_refs, node) { | |
1331 | /* Search for private user controls that are compatible with | |
1332 | VIDIOC_G/S_CTRL. */ | |
1333 | if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER && | |
1334 | V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) { | |
1335 | if (!type_is_int(ref->ctrl)) | |
1336 | continue; | |
1337 | if (id == 0) | |
1338 | return ref; | |
1339 | id--; | |
1340 | } | |
1341 | } | |
1342 | return NULL; | |
1343 | } | |
1344 | ||
1345 | /* Find a control with the given ID. */ | |
1346 | static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id) | |
1347 | { | |
1348 | struct v4l2_ctrl_ref *ref; | |
1349 | int bucket; | |
1350 | ||
1351 | id &= V4L2_CTRL_ID_MASK; | |
1352 | ||
1353 | /* Old-style private controls need special handling */ | |
1354 | if (id >= V4L2_CID_PRIVATE_BASE) | |
1355 | return find_private_ref(hdl, id); | |
1356 | bucket = id % hdl->nr_of_buckets; | |
1357 | ||
1358 | /* Simple optimization: cache the last control found */ | |
1359 | if (hdl->cached && hdl->cached->ctrl->id == id) | |
1360 | return hdl->cached; | |
1361 | ||
1362 | /* Not in cache, search the hash */ | |
1363 | ref = hdl->buckets ? hdl->buckets[bucket] : NULL; | |
1364 | while (ref && ref->ctrl->id != id) | |
1365 | ref = ref->next; | |
1366 | ||
1367 | if (ref) | |
1368 | hdl->cached = ref; /* cache it! */ | |
1369 | return ref; | |
1370 | } | |
1371 | ||
1372 | /* Find a control with the given ID. Take the handler's lock first. */ | |
1373 | static struct v4l2_ctrl_ref *find_ref_lock( | |
1374 | struct v4l2_ctrl_handler *hdl, u32 id) | |
1375 | { | |
1376 | struct v4l2_ctrl_ref *ref = NULL; | |
1377 | ||
1378 | if (hdl) { | |
77e7c4e6 | 1379 | mutex_lock(hdl->lock); |
0996517c | 1380 | ref = find_ref(hdl, id); |
77e7c4e6 | 1381 | mutex_unlock(hdl->lock); |
0996517c HV |
1382 | } |
1383 | return ref; | |
1384 | } | |
1385 | ||
1386 | /* Find a control with the given ID. */ | |
1387 | struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id) | |
1388 | { | |
1389 | struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id); | |
1390 | ||
1391 | return ref ? ref->ctrl : NULL; | |
1392 | } | |
1393 | EXPORT_SYMBOL(v4l2_ctrl_find); | |
1394 | ||
1395 | /* Allocate a new v4l2_ctrl_ref and hook it into the handler. */ | |
1396 | static int handler_new_ref(struct v4l2_ctrl_handler *hdl, | |
1397 | struct v4l2_ctrl *ctrl) | |
1398 | { | |
1399 | struct v4l2_ctrl_ref *ref; | |
1400 | struct v4l2_ctrl_ref *new_ref; | |
1401 | u32 id = ctrl->id; | |
1402 | u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1; | |
1403 | int bucket = id % hdl->nr_of_buckets; /* which bucket to use */ | |
1404 | ||
1405 | /* Automatically add the control class if it is not yet present. */ | |
1406 | if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL) | |
1407 | if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0)) | |
1408 | return hdl->error; | |
1409 | ||
1410 | if (hdl->error) | |
1411 | return hdl->error; | |
1412 | ||
1413 | new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL); | |
1414 | if (!new_ref) | |
1415 | return handler_set_err(hdl, -ENOMEM); | |
1416 | new_ref->ctrl = ctrl; | |
1417 | if (ctrl->handler == hdl) { | |
1418 | /* By default each control starts in a cluster of its own. | |
1419 | new_ref->ctrl is basically a cluster array with one | |
1420 | element, so that's perfect to use as the cluster pointer. | |
1421 | But only do this for the handler that owns the control. */ | |
1422 | ctrl->cluster = &new_ref->ctrl; | |
1423 | ctrl->ncontrols = 1; | |
1424 | } | |
1425 | ||
1426 | INIT_LIST_HEAD(&new_ref->node); | |
1427 | ||
77e7c4e6 | 1428 | mutex_lock(hdl->lock); |
0996517c HV |
1429 | |
1430 | /* Add immediately at the end of the list if the list is empty, or if | |
1431 | the last element in the list has a lower ID. | |
1432 | This ensures that when elements are added in ascending order the | |
1433 | insertion is an O(1) operation. */ | |
1434 | if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) { | |
1435 | list_add_tail(&new_ref->node, &hdl->ctrl_refs); | |
1436 | goto insert_in_hash; | |
1437 | } | |
1438 | ||
1439 | /* Find insert position in sorted list */ | |
1440 | list_for_each_entry(ref, &hdl->ctrl_refs, node) { | |
1441 | if (ref->ctrl->id < id) | |
1442 | continue; | |
1443 | /* Don't add duplicates */ | |
1444 | if (ref->ctrl->id == id) { | |
1445 | kfree(new_ref); | |
1446 | goto unlock; | |
1447 | } | |
1448 | list_add(&new_ref->node, ref->node.prev); | |
1449 | break; | |
1450 | } | |
1451 | ||
1452 | insert_in_hash: | |
1453 | /* Insert the control node in the hash */ | |
1454 | new_ref->next = hdl->buckets[bucket]; | |
1455 | hdl->buckets[bucket] = new_ref; | |
1456 | ||
1457 | unlock: | |
77e7c4e6 | 1458 | mutex_unlock(hdl->lock); |
0996517c HV |
1459 | return 0; |
1460 | } | |
1461 | ||
1462 | /* Add a new control */ | |
1463 | static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl, | |
1464 | const struct v4l2_ctrl_ops *ops, | |
1465 | u32 id, const char *name, enum v4l2_ctrl_type type, | |
1466 | s32 min, s32 max, u32 step, s32 def, | |
ce580fe5 SA |
1467 | u32 flags, const char * const *qmenu, |
1468 | const s64 *qmenu_int, void *priv) | |
0996517c HV |
1469 | { |
1470 | struct v4l2_ctrl *ctrl; | |
1471 | unsigned sz_extra = 0; | |
1472 | ||
1473 | if (hdl->error) | |
1474 | return NULL; | |
1475 | ||
1476 | /* Sanity checks */ | |
1477 | if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE || | |
0996517c | 1478 | (type == V4L2_CTRL_TYPE_INTEGER && step == 0) || |
fa4d7096 | 1479 | (type == V4L2_CTRL_TYPE_BITMASK && max == 0) || |
0996517c | 1480 | (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) || |
ce580fe5 | 1481 | (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL) || |
0996517c HV |
1482 | (type == V4L2_CTRL_TYPE_STRING && max == 0)) { |
1483 | handler_set_err(hdl, -ERANGE); | |
1484 | return NULL; | |
1485 | } | |
fa4d7096 HV |
1486 | if (type != V4L2_CTRL_TYPE_BITMASK && max < min) { |
1487 | handler_set_err(hdl, -ERANGE); | |
1488 | return NULL; | |
1489 | } | |
02ac0480 HV |
1490 | if ((type == V4L2_CTRL_TYPE_INTEGER || |
1491 | type == V4L2_CTRL_TYPE_MENU || | |
ce580fe5 | 1492 | type == V4L2_CTRL_TYPE_INTEGER_MENU || |
02ac0480 HV |
1493 | type == V4L2_CTRL_TYPE_BOOLEAN) && |
1494 | (def < min || def > max)) { | |
1495 | handler_set_err(hdl, -ERANGE); | |
1496 | return NULL; | |
1497 | } | |
fa4d7096 HV |
1498 | if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) { |
1499 | handler_set_err(hdl, -ERANGE); | |
1500 | return NULL; | |
1501 | } | |
0996517c HV |
1502 | |
1503 | if (type == V4L2_CTRL_TYPE_BUTTON) | |
1504 | flags |= V4L2_CTRL_FLAG_WRITE_ONLY; | |
1505 | else if (type == V4L2_CTRL_TYPE_CTRL_CLASS) | |
1506 | flags |= V4L2_CTRL_FLAG_READ_ONLY; | |
1507 | else if (type == V4L2_CTRL_TYPE_STRING) | |
1508 | sz_extra += 2 * (max + 1); | |
1509 | ||
1510 | ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL); | |
1511 | if (ctrl == NULL) { | |
1512 | handler_set_err(hdl, -ENOMEM); | |
1513 | return NULL; | |
1514 | } | |
1515 | ||
1516 | INIT_LIST_HEAD(&ctrl->node); | |
77068d36 | 1517 | INIT_LIST_HEAD(&ctrl->ev_subs); |
0996517c HV |
1518 | ctrl->handler = hdl; |
1519 | ctrl->ops = ops; | |
1520 | ctrl->id = id; | |
1521 | ctrl->name = name; | |
1522 | ctrl->type = type; | |
1523 | ctrl->flags = flags; | |
1524 | ctrl->minimum = min; | |
1525 | ctrl->maximum = max; | |
1526 | ctrl->step = step; | |
ce580fe5 SA |
1527 | if (type == V4L2_CTRL_TYPE_MENU) |
1528 | ctrl->qmenu = qmenu; | |
1529 | else if (type == V4L2_CTRL_TYPE_INTEGER_MENU) | |
1530 | ctrl->qmenu_int = qmenu_int; | |
0996517c HV |
1531 | ctrl->priv = priv; |
1532 | ctrl->cur.val = ctrl->val = ctrl->default_value = def; | |
1533 | ||
1534 | if (ctrl->type == V4L2_CTRL_TYPE_STRING) { | |
1535 | ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1); | |
1536 | ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1); | |
1537 | if (ctrl->minimum) | |
1538 | memset(ctrl->cur.string, ' ', ctrl->minimum); | |
1539 | } | |
1540 | if (handler_new_ref(hdl, ctrl)) { | |
1541 | kfree(ctrl); | |
1542 | return NULL; | |
1543 | } | |
77e7c4e6 | 1544 | mutex_lock(hdl->lock); |
0996517c | 1545 | list_add_tail(&ctrl->node, &hdl->ctrls); |
77e7c4e6 | 1546 | mutex_unlock(hdl->lock); |
0996517c HV |
1547 | return ctrl; |
1548 | } | |
1549 | ||
1550 | struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl, | |
1551 | const struct v4l2_ctrl_config *cfg, void *priv) | |
1552 | { | |
1553 | bool is_menu; | |
1554 | struct v4l2_ctrl *ctrl; | |
1555 | const char *name = cfg->name; | |
513521ea | 1556 | const char * const *qmenu = cfg->qmenu; |
ce580fe5 | 1557 | const s64 *qmenu_int = cfg->qmenu_int; |
0996517c HV |
1558 | enum v4l2_ctrl_type type = cfg->type; |
1559 | u32 flags = cfg->flags; | |
1560 | s32 min = cfg->min; | |
1561 | s32 max = cfg->max; | |
1562 | u32 step = cfg->step; | |
1563 | s32 def = cfg->def; | |
1564 | ||
1565 | if (name == NULL) | |
1566 | v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step, | |
1567 | &def, &flags); | |
1568 | ||
ce580fe5 SA |
1569 | is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU || |
1570 | cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU); | |
0996517c HV |
1571 | if (is_menu) |
1572 | WARN_ON(step); | |
1573 | else | |
1574 | WARN_ON(cfg->menu_skip_mask); | |
ce580fe5 | 1575 | if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) |
0996517c | 1576 | qmenu = v4l2_ctrl_get_menu(cfg->id); |
ce580fe5 SA |
1577 | else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU && |
1578 | qmenu_int == NULL) { | |
1579 | handler_set_err(hdl, -EINVAL); | |
1580 | return NULL; | |
1581 | } | |
0996517c HV |
1582 | |
1583 | ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name, | |
1584 | type, min, max, | |
1585 | is_menu ? cfg->menu_skip_mask : step, | |
ce580fe5 | 1586 | def, flags, qmenu, qmenu_int, priv); |
88365105 | 1587 | if (ctrl) |
0996517c | 1588 | ctrl->is_private = cfg->is_private; |
0996517c HV |
1589 | return ctrl; |
1590 | } | |
1591 | EXPORT_SYMBOL(v4l2_ctrl_new_custom); | |
1592 | ||
1593 | /* Helper function for standard non-menu controls */ | |
1594 | struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl, | |
1595 | const struct v4l2_ctrl_ops *ops, | |
1596 | u32 id, s32 min, s32 max, u32 step, s32 def) | |
1597 | { | |
1598 | const char *name; | |
1599 | enum v4l2_ctrl_type type; | |
1600 | u32 flags; | |
1601 | ||
1602 | v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); | |
ce580fe5 SA |
1603 | if (type == V4L2_CTRL_TYPE_MENU |
1604 | || type == V4L2_CTRL_TYPE_INTEGER_MENU) { | |
0996517c HV |
1605 | handler_set_err(hdl, -EINVAL); |
1606 | return NULL; | |
1607 | } | |
1608 | return v4l2_ctrl_new(hdl, ops, id, name, type, | |
ce580fe5 | 1609 | min, max, step, def, flags, NULL, NULL, NULL); |
0996517c HV |
1610 | } |
1611 | EXPORT_SYMBOL(v4l2_ctrl_new_std); | |
1612 | ||
1613 | /* Helper function for standard menu controls */ | |
1614 | struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl, | |
1615 | const struct v4l2_ctrl_ops *ops, | |
1616 | u32 id, s32 max, s32 mask, s32 def) | |
1617 | { | |
513521ea | 1618 | const char * const *qmenu = v4l2_ctrl_get_menu(id); |
0996517c HV |
1619 | const char *name; |
1620 | enum v4l2_ctrl_type type; | |
1621 | s32 min; | |
1622 | s32 step; | |
1623 | u32 flags; | |
1624 | ||
1625 | v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); | |
1626 | if (type != V4L2_CTRL_TYPE_MENU) { | |
1627 | handler_set_err(hdl, -EINVAL); | |
1628 | return NULL; | |
1629 | } | |
1630 | return v4l2_ctrl_new(hdl, ops, id, name, type, | |
ce580fe5 | 1631 | 0, max, mask, def, flags, qmenu, NULL, NULL); |
0996517c HV |
1632 | } |
1633 | EXPORT_SYMBOL(v4l2_ctrl_new_std_menu); | |
1634 | ||
515f3287 SN |
1635 | /* Helper function for standard integer menu controls */ |
1636 | struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl, | |
1637 | const struct v4l2_ctrl_ops *ops, | |
1638 | u32 id, s32 max, s32 def, const s64 *qmenu_int) | |
1639 | { | |
1640 | const char *name; | |
1641 | enum v4l2_ctrl_type type; | |
1642 | s32 min; | |
1643 | s32 step; | |
1644 | u32 flags; | |
1645 | ||
1646 | v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags); | |
1647 | if (type != V4L2_CTRL_TYPE_INTEGER_MENU) { | |
1648 | handler_set_err(hdl, -EINVAL); | |
1649 | return NULL; | |
1650 | } | |
1651 | return v4l2_ctrl_new(hdl, ops, id, name, type, | |
1652 | 0, max, 0, def, flags, NULL, qmenu_int, NULL); | |
1653 | } | |
1654 | EXPORT_SYMBOL(v4l2_ctrl_new_int_menu); | |
1655 | ||
0996517c HV |
1656 | /* Add a control from another handler to this handler */ |
1657 | struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl, | |
1658 | struct v4l2_ctrl *ctrl) | |
1659 | { | |
1660 | if (hdl == NULL || hdl->error) | |
1661 | return NULL; | |
1662 | if (ctrl == NULL) { | |
1663 | handler_set_err(hdl, -EINVAL); | |
1664 | return NULL; | |
1665 | } | |
1666 | if (ctrl->handler == hdl) | |
1667 | return ctrl; | |
1668 | return handler_new_ref(hdl, ctrl) ? NULL : ctrl; | |
1669 | } | |
1670 | EXPORT_SYMBOL(v4l2_ctrl_add_ctrl); | |
1671 | ||
1672 | /* Add the controls from another handler to our own. */ | |
1673 | int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl, | |
1674 | struct v4l2_ctrl_handler *add) | |
1675 | { | |
072e6602 | 1676 | struct v4l2_ctrl_ref *ref; |
0996517c HV |
1677 | int ret = 0; |
1678 | ||
1679 | /* Do nothing if either handler is NULL or if they are the same */ | |
1680 | if (!hdl || !add || hdl == add) | |
1681 | return 0; | |
1682 | if (hdl->error) | |
1683 | return hdl->error; | |
77e7c4e6 | 1684 | mutex_lock(add->lock); |
072e6602 HV |
1685 | list_for_each_entry(ref, &add->ctrl_refs, node) { |
1686 | struct v4l2_ctrl *ctrl = ref->ctrl; | |
1687 | ||
0996517c HV |
1688 | /* Skip handler-private controls. */ |
1689 | if (ctrl->is_private) | |
1690 | continue; | |
6e239399 HV |
1691 | /* And control classes */ |
1692 | if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) | |
1693 | continue; | |
0996517c HV |
1694 | ret = handler_new_ref(hdl, ctrl); |
1695 | if (ret) | |
1696 | break; | |
1697 | } | |
77e7c4e6 | 1698 | mutex_unlock(add->lock); |
0996517c HV |
1699 | return ret; |
1700 | } | |
1701 | EXPORT_SYMBOL(v4l2_ctrl_add_handler); | |
1702 | ||
1703 | /* Cluster controls */ | |
1704 | void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls) | |
1705 | { | |
5626b8c7 | 1706 | bool has_volatiles = false; |
0996517c HV |
1707 | int i; |
1708 | ||
1709 | /* The first control is the master control and it must not be NULL */ | |
72d877ca | 1710 | BUG_ON(ncontrols == 0 || controls[0] == NULL); |
0996517c HV |
1711 | |
1712 | for (i = 0; i < ncontrols; i++) { | |
1713 | if (controls[i]) { | |
1714 | controls[i]->cluster = controls; | |
1715 | controls[i]->ncontrols = ncontrols; | |
5626b8c7 HV |
1716 | if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE) |
1717 | has_volatiles = true; | |
0996517c HV |
1718 | } |
1719 | } | |
5626b8c7 | 1720 | controls[0]->has_volatiles = has_volatiles; |
0996517c HV |
1721 | } |
1722 | EXPORT_SYMBOL(v4l2_ctrl_cluster); | |
1723 | ||
72d877ca HV |
1724 | void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls, |
1725 | u8 manual_val, bool set_volatile) | |
1726 | { | |
1727 | struct v4l2_ctrl *master = controls[0]; | |
5626b8c7 | 1728 | u32 flag = 0; |
72d877ca HV |
1729 | int i; |
1730 | ||
1731 | v4l2_ctrl_cluster(ncontrols, controls); | |
1732 | WARN_ON(ncontrols <= 1); | |
82a7c049 | 1733 | WARN_ON(manual_val < master->minimum || manual_val > master->maximum); |
5626b8c7 | 1734 | WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl)); |
72d877ca | 1735 | master->is_auto = true; |
5626b8c7 | 1736 | master->has_volatiles = set_volatile; |
72d877ca HV |
1737 | master->manual_mode_value = manual_val; |
1738 | master->flags |= V4L2_CTRL_FLAG_UPDATE; | |
5626b8c7 HV |
1739 | |
1740 | if (!is_cur_manual(master)) | |
1741 | flag = V4L2_CTRL_FLAG_INACTIVE | | |
1742 | (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0); | |
72d877ca HV |
1743 | |
1744 | for (i = 1; i < ncontrols; i++) | |
88365105 | 1745 | if (controls[i]) |
72d877ca | 1746 | controls[i]->flags |= flag; |
72d877ca HV |
1747 | } |
1748 | EXPORT_SYMBOL(v4l2_ctrl_auto_cluster); | |
1749 | ||
0996517c HV |
1750 | /* Activate/deactivate a control. */ |
1751 | void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active) | |
1752 | { | |
6e239399 HV |
1753 | /* invert since the actual flag is called 'inactive' */ |
1754 | bool inactive = !active; | |
1755 | bool old; | |
1756 | ||
0996517c HV |
1757 | if (ctrl == NULL) |
1758 | return; | |
1759 | ||
6e239399 | 1760 | if (inactive) |
0996517c | 1761 | /* set V4L2_CTRL_FLAG_INACTIVE */ |
6e239399 | 1762 | old = test_and_set_bit(4, &ctrl->flags); |
0996517c HV |
1763 | else |
1764 | /* clear V4L2_CTRL_FLAG_INACTIVE */ | |
6e239399 HV |
1765 | old = test_and_clear_bit(4, &ctrl->flags); |
1766 | if (old != inactive) | |
1767 | send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); | |
0996517c HV |
1768 | } |
1769 | EXPORT_SYMBOL(v4l2_ctrl_activate); | |
1770 | ||
1771 | /* Grab/ungrab a control. | |
1772 | Typically used when streaming starts and you want to grab controls, | |
1773 | preventing the user from changing them. | |
1774 | ||
1775 | Just call this and the framework will block any attempts to change | |
1776 | these controls. */ | |
1777 | void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed) | |
1778 | { | |
6e239399 HV |
1779 | bool old; |
1780 | ||
0996517c HV |
1781 | if (ctrl == NULL) |
1782 | return; | |
1783 | ||
6e239399 | 1784 | v4l2_ctrl_lock(ctrl); |
0996517c HV |
1785 | if (grabbed) |
1786 | /* set V4L2_CTRL_FLAG_GRABBED */ | |
6e239399 | 1787 | old = test_and_set_bit(1, &ctrl->flags); |
0996517c HV |
1788 | else |
1789 | /* clear V4L2_CTRL_FLAG_GRABBED */ | |
6e239399 HV |
1790 | old = test_and_clear_bit(1, &ctrl->flags); |
1791 | if (old != grabbed) | |
1792 | send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS); | |
1793 | v4l2_ctrl_unlock(ctrl); | |
0996517c HV |
1794 | } |
1795 | EXPORT_SYMBOL(v4l2_ctrl_grab); | |
1796 | ||
1797 | /* Log the control name and value */ | |
1798 | static void log_ctrl(const struct v4l2_ctrl *ctrl, | |
1799 | const char *prefix, const char *colon) | |
1800 | { | |
0996517c HV |
1801 | if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY)) |
1802 | return; | |
1803 | if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) | |
1804 | return; | |
1805 | ||
1806 | printk(KERN_INFO "%s%s%s: ", prefix, colon, ctrl->name); | |
1807 | ||
1808 | switch (ctrl->type) { | |
1809 | case V4L2_CTRL_TYPE_INTEGER: | |
1810 | printk(KERN_CONT "%d", ctrl->cur.val); | |
1811 | break; | |
1812 | case V4L2_CTRL_TYPE_BOOLEAN: | |
1813 | printk(KERN_CONT "%s", ctrl->cur.val ? "true" : "false"); | |
1814 | break; | |
1815 | case V4L2_CTRL_TYPE_MENU: | |
1816 | printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]); | |
1817 | break; | |
ce580fe5 SA |
1818 | case V4L2_CTRL_TYPE_INTEGER_MENU: |
1819 | printk(KERN_CONT "%lld", ctrl->qmenu_int[ctrl->cur.val]); | |
1820 | break; | |
fa4d7096 HV |
1821 | case V4L2_CTRL_TYPE_BITMASK: |
1822 | printk(KERN_CONT "0x%08x", ctrl->cur.val); | |
1823 | break; | |
0996517c HV |
1824 | case V4L2_CTRL_TYPE_INTEGER64: |
1825 | printk(KERN_CONT "%lld", ctrl->cur.val64); | |
1826 | break; | |
1827 | case V4L2_CTRL_TYPE_STRING: | |
1828 | printk(KERN_CONT "%s", ctrl->cur.string); | |
1829 | break; | |
1830 | default: | |
1831 | printk(KERN_CONT "unknown type %d", ctrl->type); | |
1832 | break; | |
1833 | } | |
88365105 HV |
1834 | if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE | |
1835 | V4L2_CTRL_FLAG_GRABBED | | |
1836 | V4L2_CTRL_FLAG_VOLATILE)) { | |
1837 | if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE) | |
1838 | printk(KERN_CONT " inactive"); | |
1839 | if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED) | |
1840 | printk(KERN_CONT " grabbed"); | |
1841 | if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) | |
1842 | printk(KERN_CONT " volatile"); | |
1843 | } | |
1844 | printk(KERN_CONT "\n"); | |
0996517c HV |
1845 | } |
1846 | ||
1847 | /* Log all controls owned by the handler */ | |
1848 | void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl, | |
1849 | const char *prefix) | |
1850 | { | |
1851 | struct v4l2_ctrl *ctrl; | |
1852 | const char *colon = ""; | |
1853 | int len; | |
1854 | ||
1855 | if (hdl == NULL) | |
1856 | return; | |
1857 | if (prefix == NULL) | |
1858 | prefix = ""; | |
1859 | len = strlen(prefix); | |
1860 | if (len && prefix[len - 1] != ' ') | |
1861 | colon = ": "; | |
77e7c4e6 | 1862 | mutex_lock(hdl->lock); |
0996517c HV |
1863 | list_for_each_entry(ctrl, &hdl->ctrls, node) |
1864 | if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED)) | |
1865 | log_ctrl(ctrl, prefix, colon); | |
77e7c4e6 | 1866 | mutex_unlock(hdl->lock); |
0996517c HV |
1867 | } |
1868 | EXPORT_SYMBOL(v4l2_ctrl_handler_log_status); | |
1869 | ||
1870 | /* Call s_ctrl for all controls owned by the handler */ | |
1871 | int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl) | |
1872 | { | |
1873 | struct v4l2_ctrl *ctrl; | |
1874 | int ret = 0; | |
1875 | ||
1876 | if (hdl == NULL) | |
1877 | return 0; | |
77e7c4e6 | 1878 | mutex_lock(hdl->lock); |
0996517c HV |
1879 | list_for_each_entry(ctrl, &hdl->ctrls, node) |
1880 | ctrl->done = false; | |
1881 | ||
1882 | list_for_each_entry(ctrl, &hdl->ctrls, node) { | |
1883 | struct v4l2_ctrl *master = ctrl->cluster[0]; | |
1884 | int i; | |
1885 | ||
1886 | /* Skip if this control was already handled by a cluster. */ | |
71c6c4c9 HV |
1887 | /* Skip button controls and read-only controls. */ |
1888 | if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON || | |
1889 | (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)) | |
0996517c HV |
1890 | continue; |
1891 | ||
2a863793 HV |
1892 | for (i = 0; i < master->ncontrols; i++) { |
1893 | if (master->cluster[i]) { | |
1894 | cur_to_new(master->cluster[i]); | |
1895 | master->cluster[i]->is_new = 1; | |
71c6c4c9 | 1896 | master->cluster[i]->done = true; |
2a863793 HV |
1897 | } |
1898 | } | |
54c911eb | 1899 | ret = call_op(master, s_ctrl); |
0996517c HV |
1900 | if (ret) |
1901 | break; | |
0996517c | 1902 | } |
77e7c4e6 | 1903 | mutex_unlock(hdl->lock); |
0996517c HV |
1904 | return ret; |
1905 | } | |
1906 | EXPORT_SYMBOL(v4l2_ctrl_handler_setup); | |
1907 | ||
1908 | /* Implement VIDIOC_QUERYCTRL */ | |
1909 | int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc) | |
1910 | { | |
1911 | u32 id = qc->id & V4L2_CTRL_ID_MASK; | |
1912 | struct v4l2_ctrl_ref *ref; | |
1913 | struct v4l2_ctrl *ctrl; | |
1914 | ||
1915 | if (hdl == NULL) | |
1916 | return -EINVAL; | |
1917 | ||
77e7c4e6 | 1918 | mutex_lock(hdl->lock); |
0996517c HV |
1919 | |
1920 | /* Try to find it */ | |
1921 | ref = find_ref(hdl, id); | |
1922 | ||
1923 | if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) { | |
1924 | /* Find the next control with ID > qc->id */ | |
1925 | ||
1926 | /* Did we reach the end of the control list? */ | |
1927 | if (id >= node2id(hdl->ctrl_refs.prev)) { | |
1928 | ref = NULL; /* Yes, so there is no next control */ | |
1929 | } else if (ref) { | |
1930 | /* We found a control with the given ID, so just get | |
1931 | the next one in the list. */ | |
1932 | ref = list_entry(ref->node.next, typeof(*ref), node); | |
1933 | } else { | |
1934 | /* No control with the given ID exists, so start | |
1935 | searching for the next largest ID. We know there | |
1936 | is one, otherwise the first 'if' above would have | |
1937 | been true. */ | |
1938 | list_for_each_entry(ref, &hdl->ctrl_refs, node) | |
1939 | if (id < ref->ctrl->id) | |
1940 | break; | |
1941 | } | |
1942 | } | |
77e7c4e6 | 1943 | mutex_unlock(hdl->lock); |
0996517c HV |
1944 | if (!ref) |
1945 | return -EINVAL; | |
1946 | ||
1947 | ctrl = ref->ctrl; | |
1948 | memset(qc, 0, sizeof(*qc)); | |
829fb2dc HV |
1949 | if (id >= V4L2_CID_PRIVATE_BASE) |
1950 | qc->id = id; | |
1951 | else | |
1952 | qc->id = ctrl->id; | |
0996517c HV |
1953 | strlcpy(qc->name, ctrl->name, sizeof(qc->name)); |
1954 | qc->minimum = ctrl->minimum; | |
1955 | qc->maximum = ctrl->maximum; | |
1956 | qc->default_value = ctrl->default_value; | |
ce580fe5 SA |
1957 | if (ctrl->type == V4L2_CTRL_TYPE_MENU |
1958 | || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU) | |
0996517c HV |
1959 | qc->step = 1; |
1960 | else | |
1961 | qc->step = ctrl->step; | |
1962 | qc->flags = ctrl->flags; | |
1963 | qc->type = ctrl->type; | |
1964 | return 0; | |
1965 | } | |
1966 | EXPORT_SYMBOL(v4l2_queryctrl); | |
1967 | ||
1968 | int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc) | |
1969 | { | |
87a0c94c HV |
1970 | if (qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) |
1971 | return -EINVAL; | |
0996517c HV |
1972 | return v4l2_queryctrl(sd->ctrl_handler, qc); |
1973 | } | |
1974 | EXPORT_SYMBOL(v4l2_subdev_queryctrl); | |
1975 | ||
1976 | /* Implement VIDIOC_QUERYMENU */ | |
1977 | int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm) | |
1978 | { | |
1979 | struct v4l2_ctrl *ctrl; | |
1980 | u32 i = qm->index; | |
1981 | ||
1982 | ctrl = v4l2_ctrl_find(hdl, qm->id); | |
1983 | if (!ctrl) | |
1984 | return -EINVAL; | |
1985 | ||
1986 | qm->reserved = 0; | |
1987 | /* Sanity checks */ | |
ce580fe5 SA |
1988 | switch (ctrl->type) { |
1989 | case V4L2_CTRL_TYPE_MENU: | |
1990 | if (ctrl->qmenu == NULL) | |
1991 | return -EINVAL; | |
1992 | break; | |
1993 | case V4L2_CTRL_TYPE_INTEGER_MENU: | |
1994 | if (ctrl->qmenu_int == NULL) | |
1995 | return -EINVAL; | |
1996 | break; | |
1997 | default: | |
1998 | return -EINVAL; | |
1999 | } | |
2000 | ||
2001 | if (i < ctrl->minimum || i > ctrl->maximum) | |
0996517c | 2002 | return -EINVAL; |
ce580fe5 | 2003 | |
0996517c HV |
2004 | /* Use mask to see if this menu item should be skipped */ |
2005 | if (ctrl->menu_skip_mask & (1 << i)) | |
2006 | return -EINVAL; | |
2007 | /* Empty menu items should also be skipped */ | |
ce580fe5 SA |
2008 | if (ctrl->type == V4L2_CTRL_TYPE_MENU) { |
2009 | if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0') | |
2010 | return -EINVAL; | |
2011 | strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name)); | |
2012 | } else { | |
2013 | qm->value = ctrl->qmenu_int[i]; | |
2014 | } | |
0996517c HV |
2015 | return 0; |
2016 | } | |
2017 | EXPORT_SYMBOL(v4l2_querymenu); | |
2018 | ||
2019 | int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm) | |
2020 | { | |
2021 | return v4l2_querymenu(sd->ctrl_handler, qm); | |
2022 | } | |
2023 | EXPORT_SYMBOL(v4l2_subdev_querymenu); | |
2024 | ||
2025 | ||
2026 | ||
2027 | /* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS: | |
2028 | ||
2029 | It is not a fully atomic operation, just best-effort only. After all, if | |
2030 | multiple controls have to be set through multiple i2c writes (for example) | |
2031 | then some initial writes may succeed while others fail. Thus leaving the | |
2032 | system in an inconsistent state. The question is how much effort you are | |
2033 | willing to spend on trying to make something atomic that really isn't. | |
2034 | ||
2035 | From the point of view of an application the main requirement is that | |
2036 | when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an | |
2037 | error should be returned without actually affecting any controls. | |
2038 | ||
2039 | If all the values are correct, then it is acceptable to just give up | |
2040 | in case of low-level errors. | |
2041 | ||
2042 | It is important though that the application can tell when only a partial | |
2043 | configuration was done. The way we do that is through the error_idx field | |
2044 | of struct v4l2_ext_controls: if that is equal to the count field then no | |
2045 | controls were affected. Otherwise all controls before that index were | |
2046 | successful in performing their 'get' or 'set' operation, the control at | |
2047 | the given index failed, and you don't know what happened with the controls | |
2048 | after the failed one. Since if they were part of a control cluster they | |
2049 | could have been successfully processed (if a cluster member was encountered | |
2050 | at index < error_idx), they could have failed (if a cluster member was at | |
2051 | error_idx), or they may not have been processed yet (if the first cluster | |
2052 | member appeared after error_idx). | |
2053 | ||
2054 | It is all fairly theoretical, though. In practice all you can do is to | |
2055 | bail out. If error_idx == count, then it is an application bug. If | |
2056 | error_idx < count then it is only an application bug if the error code was | |
2057 | EBUSY. That usually means that something started streaming just when you | |
2058 | tried to set the controls. In all other cases it is a driver/hardware | |
2059 | problem and all you can do is to retry or bail out. | |
2060 | ||
2061 | Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that | |
2062 | never modifies controls the error_idx is just set to whatever control | |
2063 | has an invalid value. | |
2064 | */ | |
2065 | ||
2066 | /* Prepare for the extended g/s/try functions. | |
2067 | Find the controls in the control array and do some basic checks. */ | |
2068 | static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl, | |
2069 | struct v4l2_ext_controls *cs, | |
eb5b16ef | 2070 | struct v4l2_ctrl_helper *helpers) |
0996517c | 2071 | { |
eb5b16ef HV |
2072 | struct v4l2_ctrl_helper *h; |
2073 | bool have_clusters = false; | |
0996517c HV |
2074 | u32 i; |
2075 | ||
eb5b16ef | 2076 | for (i = 0, h = helpers; i < cs->count; i++, h++) { |
0996517c | 2077 | struct v4l2_ext_control *c = &cs->controls[i]; |
eb5b16ef | 2078 | struct v4l2_ctrl_ref *ref; |
0996517c HV |
2079 | struct v4l2_ctrl *ctrl; |
2080 | u32 id = c->id & V4L2_CTRL_ID_MASK; | |
2081 | ||
37cd3b73 | 2082 | cs->error_idx = i; |
0996517c HV |
2083 | |
2084 | if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class) | |
2085 | return -EINVAL; | |
2086 | ||
2087 | /* Old-style private controls are not allowed for | |
2088 | extended controls */ | |
2089 | if (id >= V4L2_CID_PRIVATE_BASE) | |
2090 | return -EINVAL; | |
eb5b16ef HV |
2091 | ref = find_ref_lock(hdl, id); |
2092 | if (ref == NULL) | |
0996517c | 2093 | return -EINVAL; |
eb5b16ef | 2094 | ctrl = ref->ctrl; |
0996517c HV |
2095 | if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED) |
2096 | return -EINVAL; | |
2097 | ||
eb5b16ef HV |
2098 | if (ctrl->cluster[0]->ncontrols > 1) |
2099 | have_clusters = true; | |
2100 | if (ctrl->cluster[0] != ctrl) | |
2101 | ref = find_ref_lock(hdl, ctrl->cluster[0]->id); | |
2102 | /* Store the ref to the master control of the cluster */ | |
2103 | h->mref = ref; | |
2104 | h->ctrl = ctrl; | |
2105 | /* Initially set next to 0, meaning that there is no other | |
2106 | control in this helper array belonging to the same | |
2107 | cluster */ | |
2108 | h->next = 0; | |
0996517c | 2109 | } |
0996517c | 2110 | |
eb5b16ef HV |
2111 | /* We are done if there were no controls that belong to a multi- |
2112 | control cluster. */ | |
2113 | if (!have_clusters) | |
2114 | return 0; | |
0996517c | 2115 | |
eb5b16ef HV |
2116 | /* The code below figures out in O(n) time which controls in the list |
2117 | belong to the same cluster. */ | |
0996517c | 2118 | |
eb5b16ef | 2119 | /* This has to be done with the handler lock taken. */ |
77e7c4e6 | 2120 | mutex_lock(hdl->lock); |
0996517c | 2121 | |
eb5b16ef HV |
2122 | /* First zero the helper field in the master control references */ |
2123 | for (i = 0; i < cs->count; i++) | |
c082266f | 2124 | helpers[i].mref->helper = NULL; |
eb5b16ef HV |
2125 | for (i = 0, h = helpers; i < cs->count; i++, h++) { |
2126 | struct v4l2_ctrl_ref *mref = h->mref; | |
2127 | ||
2128 | /* If the mref->helper is set, then it points to an earlier | |
2129 | helper that belongs to the same cluster. */ | |
2130 | if (mref->helper) { | |
2131 | /* Set the next field of mref->helper to the current | |
2132 | index: this means that that earlier helper now | |
2133 | points to the next helper in the same cluster. */ | |
2134 | mref->helper->next = i; | |
2135 | /* mref should be set only for the first helper in the | |
2136 | cluster, clear the others. */ | |
2137 | h->mref = NULL; | |
2138 | } | |
2139 | /* Point the mref helper to the current helper struct. */ | |
2140 | mref->helper = h; | |
0996517c | 2141 | } |
77e7c4e6 | 2142 | mutex_unlock(hdl->lock); |
eb5b16ef | 2143 | return 0; |
0996517c HV |
2144 | } |
2145 | ||
2146 | /* Handles the corner case where cs->count == 0. It checks whether the | |
2147 | specified control class exists. If that class ID is 0, then it checks | |
2148 | whether there are any controls at all. */ | |
2149 | static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class) | |
2150 | { | |
2151 | if (ctrl_class == 0) | |
2152 | return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0; | |
2153 | return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL; | |
2154 | } | |
2155 | ||
2156 | ||
2157 | ||
2158 | /* Get extended controls. Allocates the helpers array if needed. */ | |
2159 | int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs) | |
2160 | { | |
eb5b16ef HV |
2161 | struct v4l2_ctrl_helper helper[4]; |
2162 | struct v4l2_ctrl_helper *helpers = helper; | |
0996517c | 2163 | int ret; |
ddac5c10 | 2164 | int i, j; |
0996517c HV |
2165 | |
2166 | cs->error_idx = cs->count; | |
2167 | cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class); | |
2168 | ||
2169 | if (hdl == NULL) | |
2170 | return -EINVAL; | |
2171 | ||
2172 | if (cs->count == 0) | |
2173 | return class_check(hdl, cs->ctrl_class); | |
2174 | ||
2175 | if (cs->count > ARRAY_SIZE(helper)) { | |
5f0049bd XW |
2176 | helpers = kmalloc_array(cs->count, sizeof(helper[0]), |
2177 | GFP_KERNEL); | |
0996517c HV |
2178 | if (helpers == NULL) |
2179 | return -ENOMEM; | |
2180 | } | |
2181 | ||
37cd3b73 HV |
2182 | ret = prepare_ext_ctrls(hdl, cs, helpers); |
2183 | cs->error_idx = cs->count; | |
0996517c HV |
2184 | |
2185 | for (i = 0; !ret && i < cs->count; i++) | |
2186 | if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY) | |
2187 | ret = -EACCES; | |
2188 | ||
2189 | for (i = 0; !ret && i < cs->count; i++) { | |
eb5b16ef HV |
2190 | int (*ctrl_to_user)(struct v4l2_ext_control *c, |
2191 | struct v4l2_ctrl *ctrl) = cur_to_user; | |
2192 | struct v4l2_ctrl *master; | |
0996517c | 2193 | |
eb5b16ef | 2194 | if (helpers[i].mref == NULL) |
0996517c HV |
2195 | continue; |
2196 | ||
eb5b16ef | 2197 | master = helpers[i].mref->ctrl; |
0996517c HV |
2198 | cs->error_idx = i; |
2199 | ||
2200 | v4l2_ctrl_lock(master); | |
ddac5c10 HV |
2201 | |
2202 | /* g_volatile_ctrl will update the new control values */ | |
5626b8c7 HV |
2203 | if ((master->flags & V4L2_CTRL_FLAG_VOLATILE) || |
2204 | (master->has_volatiles && !is_cur_manual(master))) { | |
ddac5c10 HV |
2205 | for (j = 0; j < master->ncontrols; j++) |
2206 | cur_to_new(master->cluster[j]); | |
54c911eb | 2207 | ret = call_op(master, g_volatile_ctrl); |
eb5b16ef | 2208 | ctrl_to_user = new_to_user; |
ddac5c10 HV |
2209 | } |
2210 | /* If OK, then copy the current (for non-volatile controls) | |
2211 | or the new (for volatile controls) control values to the | |
2212 | caller */ | |
eb5b16ef HV |
2213 | if (!ret) { |
2214 | u32 idx = i; | |
2215 | ||
2216 | do { | |
2217 | ret = ctrl_to_user(cs->controls + idx, | |
2218 | helpers[idx].ctrl); | |
2219 | idx = helpers[idx].next; | |
2220 | } while (!ret && idx); | |
2221 | } | |
0996517c | 2222 | v4l2_ctrl_unlock(master); |
0996517c HV |
2223 | } |
2224 | ||
2225 | if (cs->count > ARRAY_SIZE(helper)) | |
2226 | kfree(helpers); | |
2227 | return ret; | |
2228 | } | |
2229 | EXPORT_SYMBOL(v4l2_g_ext_ctrls); | |
2230 | ||
2231 | int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs) | |
2232 | { | |
2233 | return v4l2_g_ext_ctrls(sd->ctrl_handler, cs); | |
2234 | } | |
2235 | EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls); | |
2236 | ||
2237 | /* Helper function to get a single control */ | |
2238 | static int get_ctrl(struct v4l2_ctrl *ctrl, s32 *val) | |
2239 | { | |
2240 | struct v4l2_ctrl *master = ctrl->cluster[0]; | |
2241 | int ret = 0; | |
ddac5c10 | 2242 | int i; |
0996517c HV |
2243 | |
2244 | if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY) | |
2245 | return -EACCES; | |
2246 | ||
2247 | v4l2_ctrl_lock(master); | |
2248 | /* g_volatile_ctrl will update the current control values */ | |
5626b8c7 | 2249 | if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) { |
ddac5c10 HV |
2250 | for (i = 0; i < master->ncontrols; i++) |
2251 | cur_to_new(master->cluster[i]); | |
54c911eb | 2252 | ret = call_op(master, g_volatile_ctrl); |
ddac5c10 HV |
2253 | *val = ctrl->val; |
2254 | } else { | |
2255 | *val = ctrl->cur.val; | |
2256 | } | |
0996517c HV |
2257 | v4l2_ctrl_unlock(master); |
2258 | return ret; | |
2259 | } | |
2260 | ||
2261 | int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control) | |
2262 | { | |
2263 | struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id); | |
2264 | ||
2265 | if (ctrl == NULL || !type_is_int(ctrl)) | |
2266 | return -EINVAL; | |
2267 | return get_ctrl(ctrl, &control->value); | |
2268 | } | |
2269 | EXPORT_SYMBOL(v4l2_g_ctrl); | |
2270 | ||
2271 | int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control) | |
2272 | { | |
2273 | return v4l2_g_ctrl(sd->ctrl_handler, control); | |
2274 | } | |
2275 | EXPORT_SYMBOL(v4l2_subdev_g_ctrl); | |
2276 | ||
2277 | s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl) | |
2278 | { | |
2279 | s32 val = 0; | |
2280 | ||
2281 | /* It's a driver bug if this happens. */ | |
2282 | WARN_ON(!type_is_int(ctrl)); | |
2283 | get_ctrl(ctrl, &val); | |
2284 | return val; | |
2285 | } | |
2286 | EXPORT_SYMBOL(v4l2_ctrl_g_ctrl); | |
2287 | ||
2288 | ||
2289 | /* Core function that calls try/s_ctrl and ensures that the new value is | |
2290 | copied to the current value on a set. | |
2291 | Must be called with ctrl->handler->lock held. */ | |
e6402585 HV |
2292 | static int try_or_set_cluster(struct v4l2_fh *fh, |
2293 | struct v4l2_ctrl *master, bool set) | |
0996517c | 2294 | { |
72d877ca | 2295 | bool update_flag; |
eb5b16ef | 2296 | int ret; |
0996517c HV |
2297 | int i; |
2298 | ||
2299 | /* Go through the cluster and either validate the new value or | |
2300 | (if no new value was set), copy the current value to the new | |
2301 | value, ensuring a consistent view for the control ops when | |
2302 | called. */ | |
eb5b16ef | 2303 | for (i = 0; i < master->ncontrols; i++) { |
0996517c HV |
2304 | struct v4l2_ctrl *ctrl = master->cluster[i]; |
2305 | ||
2306 | if (ctrl == NULL) | |
2307 | continue; | |
2308 | ||
eb5b16ef HV |
2309 | if (!ctrl->is_new) { |
2310 | cur_to_new(ctrl); | |
0996517c HV |
2311 | continue; |
2312 | } | |
eb5b16ef HV |
2313 | /* Check again: it may have changed since the |
2314 | previous check in try_or_set_ext_ctrls(). */ | |
2315 | if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) | |
2316 | return -EBUSY; | |
0996517c HV |
2317 | } |
2318 | ||
eb5b16ef | 2319 | ret = call_op(master, try_ctrl); |
0996517c HV |
2320 | |
2321 | /* Don't set if there is no change */ | |
72d877ca HV |
2322 | if (ret || !set || !cluster_changed(master)) |
2323 | return ret; | |
2324 | ret = call_op(master, s_ctrl); | |
72d877ca HV |
2325 | if (ret) |
2326 | return ret; | |
2327 | ||
eb5b16ef | 2328 | /* If OK, then make the new values permanent. */ |
72d877ca HV |
2329 | update_flag = is_cur_manual(master) != is_new_manual(master); |
2330 | for (i = 0; i < master->ncontrols; i++) | |
ab892bac | 2331 | new_to_cur(fh, master->cluster[i], update_flag && i > 0); |
72d877ca | 2332 | return 0; |
0996517c HV |
2333 | } |
2334 | ||
e6402585 HV |
2335 | /* Validate controls. */ |
2336 | static int validate_ctrls(struct v4l2_ext_controls *cs, | |
2337 | struct v4l2_ctrl_helper *helpers, bool set) | |
0996517c | 2338 | { |
e6402585 | 2339 | unsigned i; |
0996517c HV |
2340 | int ret = 0; |
2341 | ||
eb5b16ef | 2342 | cs->error_idx = cs->count; |
0996517c HV |
2343 | for (i = 0; i < cs->count; i++) { |
2344 | struct v4l2_ctrl *ctrl = helpers[i].ctrl; | |
2345 | ||
e6402585 | 2346 | cs->error_idx = i; |
0996517c HV |
2347 | |
2348 | if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) | |
2349 | return -EACCES; | |
2350 | /* This test is also done in try_set_control_cluster() which | |
2351 | is called in atomic context, so that has the final say, | |
2352 | but it makes sense to do an up-front check as well. Once | |
2353 | an error occurs in try_set_control_cluster() some other | |
2354 | controls may have been set already and we want to do a | |
2355 | best-effort to avoid that. */ | |
2356 | if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)) | |
2357 | return -EBUSY; | |
eb5b16ef HV |
2358 | ret = validate_new(ctrl, &cs->controls[i]); |
2359 | if (ret) | |
2360 | return ret; | |
0996517c | 2361 | } |
e6402585 HV |
2362 | return 0; |
2363 | } | |
2364 | ||
5626b8c7 HV |
2365 | /* Obtain the current volatile values of an autocluster and mark them |
2366 | as new. */ | |
2367 | static void update_from_auto_cluster(struct v4l2_ctrl *master) | |
2368 | { | |
2369 | int i; | |
2370 | ||
2371 | for (i = 0; i < master->ncontrols; i++) | |
2372 | cur_to_new(master->cluster[i]); | |
2373 | if (!call_op(master, g_volatile_ctrl)) | |
2374 | for (i = 1; i < master->ncontrols; i++) | |
2375 | if (master->cluster[i]) | |
2376 | master->cluster[i]->is_new = 1; | |
2377 | } | |
2378 | ||
e6402585 HV |
2379 | /* Try or try-and-set controls */ |
2380 | static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl, | |
2381 | struct v4l2_ext_controls *cs, | |
2382 | bool set) | |
2383 | { | |
2384 | struct v4l2_ctrl_helper helper[4]; | |
2385 | struct v4l2_ctrl_helper *helpers = helper; | |
2386 | unsigned i, j; | |
2387 | int ret; | |
2388 | ||
2389 | cs->error_idx = cs->count; | |
2390 | cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class); | |
2391 | ||
2392 | if (hdl == NULL) | |
2393 | return -EINVAL; | |
2394 | ||
2395 | if (cs->count == 0) | |
2396 | return class_check(hdl, cs->ctrl_class); | |
0996517c | 2397 | |
e6402585 | 2398 | if (cs->count > ARRAY_SIZE(helper)) { |
0a3475eb XW |
2399 | helpers = kmalloc_array(cs->count, sizeof(helper[0]), |
2400 | GFP_KERNEL); | |
e6402585 HV |
2401 | if (!helpers) |
2402 | return -ENOMEM; | |
2403 | } | |
2404 | ret = prepare_ext_ctrls(hdl, cs, helpers); | |
2405 | if (!ret) | |
2406 | ret = validate_ctrls(cs, helpers, set); | |
2407 | if (ret && set) | |
2408 | cs->error_idx = cs->count; | |
0996517c | 2409 | for (i = 0; !ret && i < cs->count; i++) { |
eb5b16ef HV |
2410 | struct v4l2_ctrl *master; |
2411 | u32 idx = i; | |
0996517c | 2412 | |
eb5b16ef | 2413 | if (helpers[i].mref == NULL) |
0996517c HV |
2414 | continue; |
2415 | ||
37cd3b73 | 2416 | cs->error_idx = i; |
eb5b16ef HV |
2417 | master = helpers[i].mref->ctrl; |
2418 | v4l2_ctrl_lock(master); | |
0996517c | 2419 | |
2a863793 | 2420 | /* Reset the 'is_new' flags of the cluster */ |
0996517c HV |
2421 | for (j = 0; j < master->ncontrols; j++) |
2422 | if (master->cluster[j]) | |
2a863793 | 2423 | master->cluster[j]->is_new = 0; |
0996517c | 2424 | |
5626b8c7 HV |
2425 | /* For volatile autoclusters that are currently in auto mode |
2426 | we need to discover if it will be set to manual mode. | |
2427 | If so, then we have to copy the current volatile values | |
2428 | first since those will become the new manual values (which | |
2429 | may be overwritten by explicit new values from this set | |
2430 | of controls). */ | |
2431 | if (master->is_auto && master->has_volatiles && | |
2432 | !is_cur_manual(master)) { | |
2433 | /* Pick an initial non-manual value */ | |
2434 | s32 new_auto_val = master->manual_mode_value + 1; | |
2435 | u32 tmp_idx = idx; | |
2436 | ||
2437 | do { | |
2438 | /* Check if the auto control is part of the | |
2439 | list, and remember the new value. */ | |
2440 | if (helpers[tmp_idx].ctrl == master) | |
2441 | new_auto_val = cs->controls[tmp_idx].value; | |
2442 | tmp_idx = helpers[tmp_idx].next; | |
2443 | } while (tmp_idx); | |
2444 | /* If the new value == the manual value, then copy | |
2445 | the current volatile values. */ | |
2446 | if (new_auto_val == master->manual_mode_value) | |
2447 | update_from_auto_cluster(master); | |
2448 | } | |
2449 | ||
0996517c | 2450 | /* Copy the new caller-supplied control values. |
2a863793 | 2451 | user_to_new() sets 'is_new' to 1. */ |
eb5b16ef HV |
2452 | do { |
2453 | ret = user_to_new(cs->controls + idx, helpers[idx].ctrl); | |
2454 | idx = helpers[idx].next; | |
2455 | } while (!ret && idx); | |
0996517c HV |
2456 | |
2457 | if (!ret) | |
e6402585 | 2458 | ret = try_or_set_cluster(fh, master, set); |
0996517c HV |
2459 | |
2460 | /* Copy the new values back to userspace. */ | |
eb5b16ef HV |
2461 | if (!ret) { |
2462 | idx = i; | |
2463 | do { | |
adf41b9b | 2464 | ret = new_to_user(cs->controls + idx, |
e6402585 | 2465 | helpers[idx].ctrl); |
eb5b16ef HV |
2466 | idx = helpers[idx].next; |
2467 | } while (!ret && idx); | |
2468 | } | |
2469 | v4l2_ctrl_unlock(master); | |
0996517c | 2470 | } |
0996517c | 2471 | |
0996517c HV |
2472 | if (cs->count > ARRAY_SIZE(helper)) |
2473 | kfree(helpers); | |
2474 | return ret; | |
2475 | } | |
2476 | ||
2477 | int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs) | |
2478 | { | |
ab892bac | 2479 | return try_set_ext_ctrls(NULL, hdl, cs, false); |
0996517c HV |
2480 | } |
2481 | EXPORT_SYMBOL(v4l2_try_ext_ctrls); | |
2482 | ||
ab892bac HV |
2483 | int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl, |
2484 | struct v4l2_ext_controls *cs) | |
0996517c | 2485 | { |
ab892bac | 2486 | return try_set_ext_ctrls(fh, hdl, cs, true); |
0996517c HV |
2487 | } |
2488 | EXPORT_SYMBOL(v4l2_s_ext_ctrls); | |
2489 | ||
2490 | int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs) | |
2491 | { | |
ab892bac | 2492 | return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false); |
0996517c HV |
2493 | } |
2494 | EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls); | |
2495 | ||
2496 | int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs) | |
2497 | { | |
ab892bac | 2498 | return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true); |
0996517c HV |
2499 | } |
2500 | EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls); | |
2501 | ||
2502 | /* Helper function for VIDIOC_S_CTRL compatibility */ | |
ab892bac | 2503 | static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, s32 *val) |
0996517c HV |
2504 | { |
2505 | struct v4l2_ctrl *master = ctrl->cluster[0]; | |
2506 | int ret; | |
2507 | int i; | |
2508 | ||
eb5b16ef HV |
2509 | ret = validate_new_int(ctrl, val); |
2510 | if (ret) | |
2511 | return ret; | |
2512 | ||
0996517c HV |
2513 | v4l2_ctrl_lock(ctrl); |
2514 | ||
2a863793 | 2515 | /* Reset the 'is_new' flags of the cluster */ |
0996517c HV |
2516 | for (i = 0; i < master->ncontrols; i++) |
2517 | if (master->cluster[i]) | |
2a863793 | 2518 | master->cluster[i]->is_new = 0; |
0996517c | 2519 | |
5626b8c7 HV |
2520 | /* For autoclusters with volatiles that are switched from auto to |
2521 | manual mode we have to update the current volatile values since | |
2522 | those will become the initial manual values after such a switch. */ | |
2523 | if (master->is_auto && master->has_volatiles && ctrl == master && | |
2524 | !is_cur_manual(master) && *val == master->manual_mode_value) | |
2525 | update_from_auto_cluster(master); | |
0996517c | 2526 | ctrl->val = *val; |
2a863793 | 2527 | ctrl->is_new = 1; |
e6402585 | 2528 | ret = try_or_set_cluster(fh, master, true); |
0996517c HV |
2529 | *val = ctrl->cur.val; |
2530 | v4l2_ctrl_unlock(ctrl); | |
2531 | return ret; | |
2532 | } | |
2533 | ||
ab892bac HV |
2534 | int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl, |
2535 | struct v4l2_control *control) | |
0996517c HV |
2536 | { |
2537 | struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id); | |
2538 | ||
2539 | if (ctrl == NULL || !type_is_int(ctrl)) | |
2540 | return -EINVAL; | |
2541 | ||
7ebbc39f HV |
2542 | if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY) |
2543 | return -EACCES; | |
2544 | ||
ab892bac | 2545 | return set_ctrl(fh, ctrl, &control->value); |
0996517c HV |
2546 | } |
2547 | EXPORT_SYMBOL(v4l2_s_ctrl); | |
2548 | ||
2549 | int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control) | |
2550 | { | |
ab892bac | 2551 | return v4l2_s_ctrl(NULL, sd->ctrl_handler, control); |
0996517c HV |
2552 | } |
2553 | EXPORT_SYMBOL(v4l2_subdev_s_ctrl); | |
2554 | ||
2555 | int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val) | |
2556 | { | |
2557 | /* It's a driver bug if this happens. */ | |
2558 | WARN_ON(!type_is_int(ctrl)); | |
ab892bac | 2559 | return set_ctrl(NULL, ctrl, &val); |
0996517c HV |
2560 | } |
2561 | EXPORT_SYMBOL(v4l2_ctrl_s_ctrl); | |
6e239399 | 2562 | |
6e6d76cd | 2563 | static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems) |
6e239399 | 2564 | { |
3e366149 HG |
2565 | struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id); |
2566 | ||
2567 | if (ctrl == NULL) | |
2568 | return -EINVAL; | |
2569 | ||
6e239399 | 2570 | v4l2_ctrl_lock(ctrl); |
77068d36 | 2571 | list_add_tail(&sev->node, &ctrl->ev_subs); |
6e239399 | 2572 | if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS && |
77068d36 | 2573 | (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) { |
6e239399 | 2574 | struct v4l2_event ev; |
c12fcfd6 | 2575 | u32 changes = V4L2_EVENT_CTRL_CH_FLAGS; |
6e239399 | 2576 | |
c12fcfd6 HV |
2577 | if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)) |
2578 | changes |= V4L2_EVENT_CTRL_CH_VALUE; | |
2579 | fill_event(&ev, ctrl, changes); | |
6e6d76cd HV |
2580 | /* Mark the queue as active, allowing this initial |
2581 | event to be accepted. */ | |
2582 | sev->elems = elems; | |
77068d36 | 2583 | v4l2_event_queue_fh(sev->fh, &ev); |
6e239399 HV |
2584 | } |
2585 | v4l2_ctrl_unlock(ctrl); | |
3e366149 | 2586 | return 0; |
6e239399 | 2587 | } |
6e239399 | 2588 | |
3e366149 | 2589 | static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev) |
6e239399 | 2590 | { |
3e366149 HG |
2591 | struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id); |
2592 | ||
6e239399 | 2593 | v4l2_ctrl_lock(ctrl); |
77068d36 | 2594 | list_del(&sev->node); |
6e239399 HV |
2595 | v4l2_ctrl_unlock(ctrl); |
2596 | } | |
3e366149 HG |
2597 | |
2598 | void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new) | |
2599 | { | |
2600 | u32 old_changes = old->u.ctrl.changes; | |
2601 | ||
2602 | old->u.ctrl = new->u.ctrl; | |
2603 | old->u.ctrl.changes |= old_changes; | |
2604 | } | |
2605 | EXPORT_SYMBOL(v4l2_ctrl_replace); | |
2606 | ||
2607 | void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new) | |
2608 | { | |
2609 | new->u.ctrl.changes |= old->u.ctrl.changes; | |
2610 | } | |
2611 | EXPORT_SYMBOL(v4l2_ctrl_merge); | |
2612 | ||
2613 | const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = { | |
2614 | .add = v4l2_ctrl_add_event, | |
2615 | .del = v4l2_ctrl_del_event, | |
2616 | .replace = v4l2_ctrl_replace, | |
2617 | .merge = v4l2_ctrl_merge, | |
2618 | }; | |
2619 | EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops); | |
e2ecb257 HV |
2620 | |
2621 | int v4l2_ctrl_log_status(struct file *file, void *fh) | |
2622 | { | |
2623 | struct video_device *vfd = video_devdata(file); | |
2624 | struct v4l2_fh *vfh = file->private_data; | |
2625 | ||
2626 | if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev) | |
2627 | v4l2_ctrl_handler_log_status(vfh->ctrl_handler, | |
2628 | vfd->v4l2_dev->name); | |
2629 | return 0; | |
2630 | } | |
2631 | EXPORT_SYMBOL(v4l2_ctrl_log_status); | |
a26243b0 HV |
2632 | |
2633 | int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh, | |
2634 | struct v4l2_event_subscription *sub) | |
2635 | { | |
2636 | if (sub->type == V4L2_EVENT_CTRL) | |
3e366149 | 2637 | return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops); |
a26243b0 HV |
2638 | return -EINVAL; |
2639 | } | |
2640 | EXPORT_SYMBOL(v4l2_ctrl_subscribe_event); | |
2641 | ||
2642 | unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait) | |
2643 | { | |
2644 | struct v4l2_fh *fh = file->private_data; | |
2645 | ||
2646 | if (v4l2_event_pending(fh)) | |
2647 | return POLLPRI; | |
2648 | poll_wait(file, &fh->wait, wait); | |
2649 | return 0; | |
2650 | } | |
2651 | EXPORT_SYMBOL(v4l2_ctrl_poll); |