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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / media / video / v4l2-common.c
blobf5a93ae3cdf9d30abbd372d067bf1ed0ef51a7ba
1 /*
2 * Video for Linux Two
3 *
4 * A generic video device interface for the LINUX operating system
5 * using a set of device structures/vectors for low level operations.
6 *
7 * This file replaces the videodev.c file that comes with the
8 * regular kernel distribution.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Author: Bill Dirks <bill@thedirks.org>
16 * based on code by Alan Cox, <alan@cymru.net>
17 *
18 */
19
20 /*
21 * Video capture interface for Linux
22 *
23 * A generic video device interface for the LINUX operating system
24 * using a set of device structures/vectors for low level operations.
25 *
26 * This program is free software; you can redistribute it and/or
27 * modify it under the terms of the GNU General Public License
28 * as published by the Free Software Foundation; either version
29 * 2 of the License, or (at your option) any later version.
30 *
31 * Author: Alan Cox, <alan@lxorguk.ukuu.org.uk>
32 *
33 * Fixes:
34 */
35
36 /*
37 * Video4linux 1/2 integration by Justin Schoeman
38 * <justin@suntiger.ee.up.ac.za>
39 * 2.4 PROCFS support ported from 2.4 kernels by
40 * Iñaki García Etxebarria <garetxe@euskalnet.net>
41 * Makefile fix by "W. Michael Petullo" <mike@flyn.org>
42 * 2.4 devfs support ported from 2.4 kernels by
43 * Dan Merillat <dan@merillat.org>
44 * Added Gerd Knorrs v4l1 enhancements (Justin Schoeman)
45 */
46
47 #include <linux/module.h>
48 #include <linux/types.h>
49 #include <linux/kernel.h>
50 #include <linux/mm.h>
51 #include <linux/string.h>
52 #include <linux/errno.h>
53 #include <linux/i2c.h>
54 #include <asm/uaccess.h>
55 #include <asm/system.h>
56 #include <asm/pgtable.h>
57 #include <asm/io.h>
58 #include <asm/div64.h>
59 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
60 #include <media/v4l2-common.h>
61 #include <media/v4l2-device.h>
62 #include <media/v4l2-chip-ident.h>
63
64 #include <linux/videodev2.h>
65
66 MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr");
67 MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers");
68 MODULE_LICENSE("GPL");
69
70 /*
71 *
72 * V 4 L 2 D R I V E R H E L P E R A P I
73 *
74 */
75
76 /*
77 * Video Standard Operations (contributed by Michael Schimek)
78 */
79
80
81 /* ----------------------------------------------------------------- */
82 /* priority handling */
83
84 #define V4L2_PRIO_VALID(val) (val == V4L2_PRIORITY_BACKGROUND || \
85 val == V4L2_PRIORITY_INTERACTIVE || \
86 val == V4L2_PRIORITY_RECORD)
87
88 int v4l2_prio_init(struct v4l2_prio_state *global)
89 {
90 memset(global,0,sizeof(*global));
91 return 0;
92 }
93 EXPORT_SYMBOL(v4l2_prio_init);
94
95 int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
96 enum v4l2_priority new)
97 {
98 if (!V4L2_PRIO_VALID(new))
99 return -EINVAL;
100 if (*local == new)
101 return 0;
102
103 atomic_inc(&global->prios[new]);
104 if (V4L2_PRIO_VALID(*local))
105 atomic_dec(&global->prios[*local]);
106 *local = new;
107 return 0;
108 }
109 EXPORT_SYMBOL(v4l2_prio_change);
110
111 int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local)
112 {
113 return v4l2_prio_change(global,local,V4L2_PRIORITY_DEFAULT);
114 }
115 EXPORT_SYMBOL(v4l2_prio_open);
116
117 int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local)
118 {
119 if (V4L2_PRIO_VALID(*local))
120 atomic_dec(&global->prios[*local]);
121 return 0;
122 }
123 EXPORT_SYMBOL(v4l2_prio_close);
124
125 enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global)
126 {
127 if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0)
128 return V4L2_PRIORITY_RECORD;
129 if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0)
130 return V4L2_PRIORITY_INTERACTIVE;
131 if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0)
132 return V4L2_PRIORITY_BACKGROUND;
133 return V4L2_PRIORITY_UNSET;
134 }
135 EXPORT_SYMBOL(v4l2_prio_max);
136
137 int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local)
138 {
139 if (*local < v4l2_prio_max(global))
140 return -EBUSY;
141 return 0;
142 }
143 EXPORT_SYMBOL(v4l2_prio_check);
144
145 /* ----------------------------------------------------------------- */
146
147 /* Helper functions for control handling */
148
149 /* Check for correctness of the ctrl's value based on the data from
150 struct v4l2_queryctrl and the available menu items. Note that
151 menu_items may be NULL, in that case it is ignored. */
152 int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
153 const char **menu_items)
154 {
155 if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED)
156 return -EINVAL;
157 if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED)
158 return -EBUSY;
159 if (qctrl->type == V4L2_CTRL_TYPE_STRING)
160 return 0;
161 if (qctrl->type == V4L2_CTRL_TYPE_BUTTON ||
162 qctrl->type == V4L2_CTRL_TYPE_INTEGER64 ||
163 qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
164 return 0;
165 if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum)
166 return -ERANGE;
167 if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) {
168 if (menu_items[ctrl->value] == NULL ||
169 menu_items[ctrl->value][0] == '\0')
170 return -EINVAL;
171 }
172 return 0;
173 }
174 EXPORT_SYMBOL(v4l2_ctrl_check);
175
176 /* Returns NULL or a character pointer array containing the menu for
177 the given control ID. The pointer array ends with a NULL pointer.
178 An empty string signifies a menu entry that is invalid. This allows
179 drivers to disable certain options if it is not supported. */
180 const char **v4l2_ctrl_get_menu(u32 id)
181 {
182 static const char *mpeg_audio_sampling_freq[] = {
183 "44.1 kHz",
184 "48 kHz",
185 "32 kHz",
186 NULL
187 };
188 static const char *mpeg_audio_encoding[] = {
189 "MPEG-1/2 Layer I",
190 "MPEG-1/2 Layer II",
191 "MPEG-1/2 Layer III",
192 "MPEG-2/4 AAC",
193 "AC-3",
194 NULL
195 };
196 static const char *mpeg_audio_l1_bitrate[] = {
197 "32 kbps",
198 "64 kbps",
199 "96 kbps",
200 "128 kbps",
201 "160 kbps",
202 "192 kbps",
203 "224 kbps",
204 "256 kbps",
205 "288 kbps",
206 "320 kbps",
207 "352 kbps",
208 "384 kbps",
209 "416 kbps",
210 "448 kbps",
211 NULL
212 };
213 static const char *mpeg_audio_l2_bitrate[] = {
214 "32 kbps",
215 "48 kbps",
216 "56 kbps",
217 "64 kbps",
218 "80 kbps",
219 "96 kbps",
220 "112 kbps",
221 "128 kbps",
222 "160 kbps",
223 "192 kbps",
224 "224 kbps",
225 "256 kbps",
226 "320 kbps",
227 "384 kbps",
228 NULL
229 };
230 static const char *mpeg_audio_l3_bitrate[] = {
231 "32 kbps",
232 "40 kbps",
233 "48 kbps",
234 "56 kbps",
235 "64 kbps",
236 "80 kbps",
237 "96 kbps",
238 "112 kbps",
239 "128 kbps",
240 "160 kbps",
241 "192 kbps",
242 "224 kbps",
243 "256 kbps",
244 "320 kbps",
245 NULL
246 };
247 static const char *mpeg_audio_ac3_bitrate[] = {
248 "32 kbps",
249 "40 kbps",
250 "48 kbps",
251 "56 kbps",
252 "64 kbps",
253 "80 kbps",
254 "96 kbps",
255 "112 kbps",
256 "128 kbps",
257 "160 kbps",
258 "192 kbps",
259 "224 kbps",
260 "256 kbps",
261 "320 kbps",
262 "384 kbps",
263 "448 kbps",
264 "512 kbps",
265 "576 kbps",
266 "640 kbps",
267 NULL
268 };
269 static const char *mpeg_audio_mode[] = {
270 "Stereo",
271 "Joint Stereo",
272 "Dual",
273 "Mono",
274 NULL
275 };
276 static const char *mpeg_audio_mode_extension[] = {
277 "Bound 4",
278 "Bound 8",
279 "Bound 12",
280 "Bound 16",
281 NULL
282 };
283 static const char *mpeg_audio_emphasis[] = {
284 "No Emphasis",
285 "50/15 us",
286 "CCITT J17",
287 NULL
288 };
289 static const char *mpeg_audio_crc[] = {
290 "No CRC",
291 "16-bit CRC",
292 NULL
293 };
294 static const char *mpeg_video_encoding[] = {
295 "MPEG-1",
296 "MPEG-2",
297 "MPEG-4 AVC",
298 NULL
299 };
300 static const char *mpeg_video_aspect[] = {
301 "1x1",
302 "4x3",
303 "16x9",
304 "2.21x1",
305 NULL
306 };
307 static const char *mpeg_video_bitrate_mode[] = {
308 "Variable Bitrate",
309 "Constant Bitrate",
310 NULL
311 };
312 static const char *mpeg_stream_type[] = {
313 "MPEG-2 Program Stream",
314 "MPEG-2 Transport Stream",
315 "MPEG-1 System Stream",
316 "MPEG-2 DVD-compatible Stream",
317 "MPEG-1 VCD-compatible Stream",
318 "MPEG-2 SVCD-compatible Stream",
319 NULL
320 };
321 static const char *mpeg_stream_vbi_fmt[] = {
322 "No VBI",
323 "Private packet, IVTV format",
324 NULL
325 };
326 static const char *camera_power_line_frequency[] = {
327 "Disabled",
328 "50 Hz",
329 "60 Hz",
330 NULL
331 };
332 static const char *camera_exposure_auto[] = {
333 "Auto Mode",
334 "Manual Mode",
335 "Shutter Priority Mode",
336 "Aperture Priority Mode",
337 NULL
338 };
339 static const char *colorfx[] = {
340 "None",
341 "Black & White",
342 "Sepia",
343 NULL
344 };
345 static const char *tune_preemphasis[] = {
346 "No preemphasis",
347 "50 useconds",
348 "75 useconds",
349 NULL,
350 };
351
352 switch (id) {
353 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
354 return mpeg_audio_sampling_freq;
355 case V4L2_CID_MPEG_AUDIO_ENCODING:
356 return mpeg_audio_encoding;
357 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
358 return mpeg_audio_l1_bitrate;
359 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
360 return mpeg_audio_l2_bitrate;
361 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
362 return mpeg_audio_l3_bitrate;
363 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
364 return mpeg_audio_ac3_bitrate;
365 case V4L2_CID_MPEG_AUDIO_MODE:
366 return mpeg_audio_mode;
367 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
368 return mpeg_audio_mode_extension;
369 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
370 return mpeg_audio_emphasis;
371 case V4L2_CID_MPEG_AUDIO_CRC:
372 return mpeg_audio_crc;
373 case V4L2_CID_MPEG_VIDEO_ENCODING:
374 return mpeg_video_encoding;
375 case V4L2_CID_MPEG_VIDEO_ASPECT:
376 return mpeg_video_aspect;
377 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
378 return mpeg_video_bitrate_mode;
379 case V4L2_CID_MPEG_STREAM_TYPE:
380 return mpeg_stream_type;
381 case V4L2_CID_MPEG_STREAM_VBI_FMT:
382 return mpeg_stream_vbi_fmt;
383 case V4L2_CID_POWER_LINE_FREQUENCY:
384 return camera_power_line_frequency;
385 case V4L2_CID_EXPOSURE_AUTO:
386 return camera_exposure_auto;
387 case V4L2_CID_COLORFX:
388 return colorfx;
389 case V4L2_CID_TUNE_PREEMPHASIS:
390 return tune_preemphasis;
391 default:
392 return NULL;
393 }
394 }
395 EXPORT_SYMBOL(v4l2_ctrl_get_menu);
396
397 /* Return the control name. */
398 const char *v4l2_ctrl_get_name(u32 id)
399 {
400 switch (id) {
401 /* USER controls */
402 case V4L2_CID_USER_CLASS: return "User Controls";
403 case V4L2_CID_BRIGHTNESS: return "Brightness";
404 case V4L2_CID_CONTRAST: return "Contrast";
405 case V4L2_CID_SATURATION: return "Saturation";
406 case V4L2_CID_HUE: return "Hue";
407 case V4L2_CID_AUDIO_VOLUME: return "Volume";
408 case V4L2_CID_AUDIO_BALANCE: return "Balance";
409 case V4L2_CID_AUDIO_BASS: return "Bass";
410 case V4L2_CID_AUDIO_TREBLE: return "Treble";
411 case V4L2_CID_AUDIO_MUTE: return "Mute";
412 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
413 case V4L2_CID_BLACK_LEVEL: return "Black Level";
414 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
415 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
416 case V4L2_CID_RED_BALANCE: return "Red Balance";
417 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
418 case V4L2_CID_GAMMA: return "Gamma";
419 case V4L2_CID_EXPOSURE: return "Exposure";
420 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
421 case V4L2_CID_GAIN: return "Gain";
422 case V4L2_CID_HFLIP: return "Horizontal Flip";
423 case V4L2_CID_VFLIP: return "Vertical Flip";
424 case V4L2_CID_HCENTER: return "Horizontal Center";
425 case V4L2_CID_VCENTER: return "Vertical Center";
426 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
427 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
428 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
429 case V4L2_CID_SHARPNESS: return "Sharpness";
430 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
431 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
432 case V4L2_CID_COLOR_KILLER: return "Color Killer";
433 case V4L2_CID_COLORFX: return "Color Effects";
434
435 /* MPEG controls */
436 case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
437 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
438 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
439 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
440 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
441 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
442 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
443 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
444 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
445 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
446 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
447 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
448 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
449 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
450 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
451 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
452 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
453 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
454 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
455 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
456 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
457 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
458 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
459 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
460 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
461 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
462 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
463 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
464 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
465 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
466 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
467 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
468 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
469
470 /* CAMERA controls */
471 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
472 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
473 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
474 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
475 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
476 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
477 case V4L2_CID_PAN_RESET: return "Pan, Reset";
478 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
479 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
480 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
481 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
482 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
483 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic";
484 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
485 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
486 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
487 case V4L2_CID_PRIVACY: return "Privacy";
488
489 /* FM Radio Modulator control */
490 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
491 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
492 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
493 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
494 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
495 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
496 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
497 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
498 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
499 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Feature Enabled";
500 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
501 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
502 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
503 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
504 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
505 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
506 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
507 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-emphasis settings";
508 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
509 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
510
511 default:
512 return NULL;
513 }
514 }
515 EXPORT_SYMBOL(v4l2_ctrl_get_name);
516
517 /* Fill in a struct v4l2_queryctrl */
518 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
519 {
520 const char *name = v4l2_ctrl_get_name(qctrl->id);
521
522 qctrl->flags = 0;
523 if (name == NULL)
524 return -EINVAL;
525
526 switch (qctrl->id) {
527 case V4L2_CID_AUDIO_MUTE:
528 case V4L2_CID_AUDIO_LOUDNESS:
529 case V4L2_CID_AUTO_WHITE_BALANCE:
530 case V4L2_CID_AUTOGAIN:
531 case V4L2_CID_HFLIP:
532 case V4L2_CID_VFLIP:
533 case V4L2_CID_HUE_AUTO:
534 case V4L2_CID_CHROMA_AGC:
535 case V4L2_CID_COLOR_KILLER:
536 case V4L2_CID_MPEG_AUDIO_MUTE:
537 case V4L2_CID_MPEG_VIDEO_MUTE:
538 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
539 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
540 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
541 case V4L2_CID_FOCUS_AUTO:
542 case V4L2_CID_PRIVACY:
543 case V4L2_CID_AUDIO_LIMITER_ENABLED:
544 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
545 case V4L2_CID_PILOT_TONE_ENABLED:
546 qctrl->type = V4L2_CTRL_TYPE_BOOLEAN;
547 min = 0;
548 max = step = 1;
549 break;
550 case V4L2_CID_PAN_RESET:
551 case V4L2_CID_TILT_RESET:
552 qctrl->type = V4L2_CTRL_TYPE_BUTTON;
553 qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
554 min = max = step = def = 0;
555 break;
556 case V4L2_CID_POWER_LINE_FREQUENCY:
557 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
558 case V4L2_CID_MPEG_AUDIO_ENCODING:
559 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
560 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
561 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
562 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
563 case V4L2_CID_MPEG_AUDIO_MODE:
564 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
565 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
566 case V4L2_CID_MPEG_AUDIO_CRC:
567 case V4L2_CID_MPEG_VIDEO_ENCODING:
568 case V4L2_CID_MPEG_VIDEO_ASPECT:
569 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
570 case V4L2_CID_MPEG_STREAM_TYPE:
571 case V4L2_CID_MPEG_STREAM_VBI_FMT:
572 case V4L2_CID_EXPOSURE_AUTO:
573 case V4L2_CID_COLORFX:
574 case V4L2_CID_TUNE_PREEMPHASIS:
575 qctrl->type = V4L2_CTRL_TYPE_MENU;
576 step = 1;
577 break;
578 case V4L2_CID_RDS_TX_PS_NAME:
579 case V4L2_CID_RDS_TX_RADIO_TEXT:
580 qctrl->type = V4L2_CTRL_TYPE_STRING;
581 break;
582 case V4L2_CID_USER_CLASS:
583 case V4L2_CID_CAMERA_CLASS:
584 case V4L2_CID_MPEG_CLASS:
585 case V4L2_CID_FM_TX_CLASS:
586 qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
587 qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
588 min = max = step = def = 0;
589 break;
590 default:
591 qctrl->type = V4L2_CTRL_TYPE_INTEGER;
592 break;
593 }
594 switch (qctrl->id) {
595 case V4L2_CID_MPEG_AUDIO_ENCODING:
596 case V4L2_CID_MPEG_AUDIO_MODE:
597 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
598 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
599 case V4L2_CID_MPEG_STREAM_TYPE:
600 qctrl->flags |= V4L2_CTRL_FLAG_UPDATE;
601 break;
602 case V4L2_CID_AUDIO_VOLUME:
603 case V4L2_CID_AUDIO_BALANCE:
604 case V4L2_CID_AUDIO_BASS:
605 case V4L2_CID_AUDIO_TREBLE:
606 case V4L2_CID_BRIGHTNESS:
607 case V4L2_CID_CONTRAST:
608 case V4L2_CID_SATURATION:
609 case V4L2_CID_HUE:
610 case V4L2_CID_RED_BALANCE:
611 case V4L2_CID_BLUE_BALANCE:
612 case V4L2_CID_GAMMA:
613 case V4L2_CID_SHARPNESS:
614 case V4L2_CID_RDS_TX_DEVIATION:
615 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
616 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
617 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
618 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
619 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
620 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
621 case V4L2_CID_PILOT_TONE_DEVIATION:
622 case V4L2_CID_PILOT_TONE_FREQUENCY:
623 case V4L2_CID_TUNE_POWER_LEVEL:
624 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
625 qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
626 break;
627 case V4L2_CID_PAN_RELATIVE:
628 case V4L2_CID_TILT_RELATIVE:
629 case V4L2_CID_FOCUS_RELATIVE:
630 case V4L2_CID_ZOOM_RELATIVE:
631 qctrl->flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
632 break;
633 }
634 qctrl->minimum = min;
635 qctrl->maximum = max;
636 qctrl->step = step;
637 qctrl->default_value = def;
638 qctrl->reserved[0] = qctrl->reserved[1] = 0;
639 strlcpy(qctrl->name, name, sizeof(qctrl->name));
640 return 0;
641 }
642 EXPORT_SYMBOL(v4l2_ctrl_query_fill);
643
644 /* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and
645 the menu. The qctrl pointer may be NULL, in which case it is ignored.
646 If menu_items is NULL, then the menu items are retrieved using
647 v4l2_ctrl_get_menu. */
648 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl,
649 const char **menu_items)
650 {
651 int i;
652
653 qmenu->reserved = 0;
654 if (menu_items == NULL)
655 menu_items = v4l2_ctrl_get_menu(qmenu->id);
656 if (menu_items == NULL ||
657 (qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum)))
658 return -EINVAL;
659 for (i = 0; i < qmenu->index && menu_items[i]; i++) ;
660 if (menu_items[i] == NULL || menu_items[i][0] == '\0')
661 return -EINVAL;
662 strlcpy(qmenu->name, menu_items[qmenu->index], sizeof(qmenu->name));
663 return 0;
664 }
665 EXPORT_SYMBOL(v4l2_ctrl_query_menu);
666
667 /* Fill in a struct v4l2_querymenu based on the specified array of valid
668 menu items (terminated by V4L2_CTRL_MENU_IDS_END).
669 Use this if there are 'holes' in the list of valid menu items. */
670 int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids)
671 {
672 const char **menu_items = v4l2_ctrl_get_menu(qmenu->id);
673
674 qmenu->reserved = 0;
675 if (menu_items == NULL || ids == NULL)
676 return -EINVAL;
677 while (*ids != V4L2_CTRL_MENU_IDS_END) {
678 if (*ids++ == qmenu->index) {
679 strlcpy(qmenu->name, menu_items[qmenu->index],
680 sizeof(qmenu->name));
681 return 0;
682 }
683 }
684 return -EINVAL;
685 }
686 EXPORT_SYMBOL(v4l2_ctrl_query_menu_valid_items);
687
688 /* ctrl_classes points to an array of u32 pointers, the last element is
689 a NULL pointer. Each u32 array is a 0-terminated array of control IDs.
690 Each array must be sorted low to high and belong to the same control
691 class. The array of u32 pointers must also be sorted, from low class IDs
692 to high class IDs.
693
694 This function returns the first ID that follows after the given ID.
695 When no more controls are available 0 is returned. */
696 u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
697 {
698 u32 ctrl_class = V4L2_CTRL_ID2CLASS(id);
699 const u32 *pctrl;
700
701 if (ctrl_classes == NULL)
702 return 0;
703
704 /* if no query is desired, then check if the ID is part of ctrl_classes */
705 if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) {
706 /* find class */
707 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class)
708 ctrl_classes++;
709 if (*ctrl_classes == NULL)
710 return 0;
711 pctrl = *ctrl_classes;
712 /* find control ID */
713 while (*pctrl && *pctrl != id) pctrl++;
714 return *pctrl ? id : 0;
715 }
716 id &= V4L2_CTRL_ID_MASK;
717 id++; /* select next control */
718 /* find first class that matches (or is greater than) the class of
719 the ID */
720 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class)
721 ctrl_classes++;
722 /* no more classes */
723 if (*ctrl_classes == NULL)
724 return 0;
725 pctrl = *ctrl_classes;
726 /* find first ctrl within the class that is >= ID */
727 while (*pctrl && *pctrl < id) pctrl++;
728 if (*pctrl)
729 return *pctrl;
730 /* we are at the end of the controls of the current class. */
731 /* continue with next class if available */
732 ctrl_classes++;
733 if (*ctrl_classes == NULL)
734 return 0;
735 return **ctrl_classes;
736 }
737 EXPORT_SYMBOL(v4l2_ctrl_next);
738
739 int v4l2_chip_match_host(const struct v4l2_dbg_match *match)
740 {
741 switch (match->type) {
742 case V4L2_CHIP_MATCH_HOST:
743 return match->addr == 0;
744 default:
745 return 0;
746 }
747 }
748 EXPORT_SYMBOL(v4l2_chip_match_host);
749
750 #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
751 int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match)
752 {
753 int len;
754
755 if (c == NULL || match == NULL)
756 return 0;
757
758 switch (match->type) {
759 case V4L2_CHIP_MATCH_I2C_DRIVER:
760 if (c->driver == NULL || c->driver->driver.name == NULL)
761 return 0;
762 len = strlen(c->driver->driver.name);
763 /* legacy drivers have a ' suffix, don't try to match that */
764 if (len && c->driver->driver.name[len - 1] == '\'')
765 len--;
766 return len && !strncmp(c->driver->driver.name, match->name, len);
767 case V4L2_CHIP_MATCH_I2C_ADDR:
768 return c->addr == match->addr;
769 default:
770 return 0;
771 }
772 }
773 EXPORT_SYMBOL(v4l2_chip_match_i2c_client);
774
775 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_dbg_chip_ident *chip,
776 u32 ident, u32 revision)
777 {
778 if (!v4l2_chip_match_i2c_client(c, &chip->match))
779 return 0;
780 if (chip->ident == V4L2_IDENT_NONE) {
781 chip->ident = ident;
782 chip->revision = revision;
783 }
784 else {
785 chip->ident = V4L2_IDENT_AMBIGUOUS;
786 chip->revision = 0;
787 }
788 return 0;
789 }
790 EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
791
792 /* ----------------------------------------------------------------- */
793
794 /* I2C Helper functions */
795
796
797 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
798 const struct v4l2_subdev_ops *ops)
799 {
800 v4l2_subdev_init(sd, ops);
801 sd->flags |= V4L2_SUBDEV_FL_IS_I2C;
802 /* the owner is the same as the i2c_client's driver owner */
803 sd->owner = client->driver->driver.owner;
804 /* i2c_client and v4l2_subdev point to one another */
805 v4l2_set_subdevdata(sd, client);
806 i2c_set_clientdata(client, sd);
807 /* initialize name */
808 snprintf(sd->name, sizeof(sd->name), "%s %d-%04x",
809 client->driver->driver.name, i2c_adapter_id(client->adapter),
810 client->addr);
811 }
812 EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_init);
813
814
815
816 /* Load an i2c sub-device. */
817 struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev,
818 struct i2c_adapter *adapter, const char *module_name,
819 struct i2c_board_info *info, const unsigned short *probe_addrs)
820 {
821 struct v4l2_subdev *sd = NULL;
822 struct i2c_client *client;
823
824 BUG_ON(!v4l2_dev);
825
826 if (module_name)
827 request_module(module_name);
828
829 /* Create the i2c client */
830 if (info->addr == 0 && probe_addrs)
831 client = i2c_new_probed_device(adapter, info, probe_addrs);
832 else
833 client = i2c_new_device(adapter, info);
834
835 /* Note: by loading the module first we are certain that c->driver
836 will be set if the driver was found. If the module was not loaded
837 first, then the i2c core tries to delay-load the module for us,
838 and then c->driver is still NULL until the module is finally
839 loaded. This delay-load mechanism doesn't work if other drivers
840 want to use the i2c device, so explicitly loading the module
841 is the best alternative. */
842 if (client == NULL || client->driver == NULL)
843 goto error;
844
845 /* Lock the module so we can safely get the v4l2_subdev pointer */
846 if (!try_module_get(client->driver->driver.owner))
847 goto error;
848 sd = i2c_get_clientdata(client);
849
850 /* Register with the v4l2_device which increases the module's
851 use count as well. */
852 if (v4l2_device_register_subdev(v4l2_dev, sd))
853 sd = NULL;
854 /* Decrease the module use count to match the first try_module_get. */
855 module_put(client->driver->driver.owner);
856
857 if (sd) {
858 /* We return errors from v4l2_subdev_call only if we have the
859 callback as the .s_config is not mandatory */
860 int err = v4l2_subdev_call(sd, core, s_config,
861 info->irq, info->platform_data);
862
863 if (err && err != -ENOIOCTLCMD) {
864 v4l2_device_unregister_subdev(sd);
865 sd = NULL;
866 }
867 }
868
869 error:
870 /* If we have a client but no subdev, then something went wrong and
871 we must unregister the client. */
872 if (client && sd == NULL)
873 i2c_unregister_device(client);
874 return sd;
875 }
876 EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_board);
877
878 struct v4l2_subdev *v4l2_i2c_new_subdev_cfg(struct v4l2_device *v4l2_dev,
879 struct i2c_adapter *adapter,
880 const char *module_name, const char *client_type,
881 int irq, void *platform_data,
882 u8 addr, const unsigned short *probe_addrs)
883 {
884 struct i2c_board_info info;
885
886 /* Setup the i2c board info with the device type and
887 the device address. */
888 memset(&info, 0, sizeof(info));
889 strlcpy(info.type, client_type, sizeof(info.type));
890 info.addr = addr;
891 info.irq = irq;
892 info.platform_data = platform_data;
893
894 return v4l2_i2c_new_subdev_board(v4l2_dev, adapter, module_name,
895 &info, probe_addrs);
896 }
897 EXPORT_SYMBOL_GPL(v4l2_i2c_new_subdev_cfg);
898
899 /* Return i2c client address of v4l2_subdev. */
900 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
901 {
902 struct i2c_client *client = v4l2_get_subdevdata(sd);
903
904 return client ? client->addr : I2C_CLIENT_END;
905 }
906 EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
907
908 /* Return a list of I2C tuner addresses to probe. Use only if the tuner
909 addresses are unknown. */
910 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
911 {
912 static const unsigned short radio_addrs[] = {
913 #if defined(CONFIG_MEDIA_TUNER_TEA5761) || defined(CONFIG_MEDIA_TUNER_TEA5761_MODULE)
914 0x10,
915 #endif
916 0x60,
917 I2C_CLIENT_END
918 };
919 static const unsigned short demod_addrs[] = {
920 0x42, 0x43, 0x4a, 0x4b,
921 I2C_CLIENT_END
922 };
923 static const unsigned short tv_addrs[] = {
924 0x42, 0x43, 0x4a, 0x4b, /* tda8290 */
925 0x60, 0x61, 0x62, 0x63, 0x64,
926 I2C_CLIENT_END
927 };
928
929 switch (type) {
930 case ADDRS_RADIO:
931 return radio_addrs;
932 case ADDRS_DEMOD:
933 return demod_addrs;
934 case ADDRS_TV:
935 return tv_addrs;
936 case ADDRS_TV_WITH_DEMOD:
937 return tv_addrs + 4;
938 }
939 return NULL;
940 }
941 EXPORT_SYMBOL_GPL(v4l2_i2c_tuner_addrs);
942
943 #endif /* defined(CONFIG_I2C) */
944
945 /* Clamp x to be between min and max, aligned to a multiple of 2^align. min
946 * and max don't have to be aligned, but there must be at least one valid
947 * value. E.g., min=17,max=31,align=4 is not allowed as there are no multiples
948 * of 16 between 17 and 31. */
949 static unsigned int clamp_align(unsigned int x, unsigned int min,
950 unsigned int max, unsigned int align)
951 {
952 /* Bits that must be zero to be aligned */
953 unsigned int mask = ~((1 << align) - 1);
954
955 /* Round to nearest aligned value */
956 if (align)
957 x = (x + (1 << (align - 1))) & mask;
958
959 /* Clamp to aligned value of min and max */
960 if (x < min)
961 x = (min + ~mask) & mask;
962 else if (x > max)
963 x = max & mask;
964
965 return x;
966 }
967
968 /* Bound an image to have a width between wmin and wmax, and height between
969 * hmin and hmax, inclusive. Additionally, the width will be a multiple of
970 * 2^walign, the height will be a multiple of 2^halign, and the overall size
971 * (width*height) will be a multiple of 2^salign. The image may be shrunk
972 * or enlarged to fit the alignment constraints.
973 *
974 * The width or height maximum must not be smaller than the corresponding
975 * minimum. The alignments must not be so high there are no possible image
976 * sizes within the allowed bounds. wmin and hmin must be at least 1
977 * (don't use 0). If you don't care about a certain alignment, specify 0,
978 * as 2^0 is 1 and one byte alignment is equivalent to no alignment. If
979 * you only want to adjust downward, specify a maximum that's the same as
980 * the initial value.
981 */
982 void v4l_bound_align_image(u32 *w, unsigned int wmin, unsigned int wmax,
983 unsigned int walign,
984 u32 *h, unsigned int hmin, unsigned int hmax,
985 unsigned int halign, unsigned int salign)
986 {
987 *w = clamp_align(*w, wmin, wmax, walign);
988 *h = clamp_align(*h, hmin, hmax, halign);
989
990 /* Usually we don't need to align the size and are done now. */
991 if (!salign)
992 return;
993
994 /* How much alignment do we have? */
995 walign = __ffs(*w);
996 halign = __ffs(*h);
997 /* Enough to satisfy the image alignment? */
998 if (walign + halign < salign) {
999 /* Max walign where there is still a valid width */
1000 unsigned int wmaxa = __fls(wmax ^ (wmin - 1));
1001 /* Max halign where there is still a valid height */
1002 unsigned int hmaxa = __fls(hmax ^ (hmin - 1));
1003
1004 /* up the smaller alignment until we have enough */
1005 do {
1006 if (halign >= hmaxa ||
1007 (walign <= halign && walign < wmaxa)) {
1008 *w = clamp_align(*w, wmin, wmax, walign + 1);
1009 walign = __ffs(*w);
1010 } else {
1011 *h = clamp_align(*h, hmin, hmax, halign + 1);
1012 halign = __ffs(*h);
1013 }
1014 } while (halign + walign < salign);
1015 }
1016 }
1017 EXPORT_SYMBOL_GPL(v4l_bound_align_image);
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