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V4L/DVB (6289): Remove reference to dead CONFIG_UST and ust.h header
[linux-2.6/mini2440.git] / drivers / media / video / v4l2-common.c
blobc3440b280d208456d6d50980f8949ae423aba493
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@redhat.com>
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 #include <linux/video_decoder.h>
60 #define __OLD_VIDIOC_ /* To allow fixing old calls*/
61 #include <media/v4l2-common.h>
62 #include <media/v4l2-chip-ident.h>
63
64 #ifdef CONFIG_KMOD
65 #include <linux/kmod.h>
66 #endif
67
68 #include <linux/videodev.h>
69
70 MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr");
71 MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers");
72 MODULE_LICENSE("GPL");
73
74 /*
75 *
76 * V 4 L 2 D R I V E R H E L P E R A P I
77 *
78 */
79
80 /*
81 * Video Standard Operations (contributed by Michael Schimek)
82 */
83
84
85 char *v4l2_norm_to_name(v4l2_std_id id)
86 {
87 char *name;
88 u32 myid = id;
89
90 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
91 64 bit comparations. So, on that architecture, with some gcc variants,
92 compilation fails. Currently, the max value is 30bit wide.
93 */
94 BUG_ON(myid != id);
95
96 switch (myid) {
97 case V4L2_STD_PAL:
98 name="PAL"; break;
99 case V4L2_STD_PAL_BG:
100 name="PAL-BG"; break;
101 case V4L2_STD_PAL_DK:
102 name="PAL-DK"; break;
103 case V4L2_STD_PAL_B:
104 name="PAL-B"; break;
105 case V4L2_STD_PAL_B1:
106 name="PAL-B1"; break;
107 case V4L2_STD_PAL_G:
108 name="PAL-G"; break;
109 case V4L2_STD_PAL_H:
110 name="PAL-H"; break;
111 case V4L2_STD_PAL_I:
112 name="PAL-I"; break;
113 case V4L2_STD_PAL_D:
114 name="PAL-D"; break;
115 case V4L2_STD_PAL_D1:
116 name="PAL-D1"; break;
117 case V4L2_STD_PAL_K:
118 name="PAL-K"; break;
119 case V4L2_STD_PAL_M:
120 name="PAL-M"; break;
121 case V4L2_STD_PAL_N:
122 name="PAL-N"; break;
123 case V4L2_STD_PAL_Nc:
124 name="PAL-Nc"; break;
125 case V4L2_STD_PAL_60:
126 name="PAL-60"; break;
127 case V4L2_STD_NTSC:
128 name="NTSC"; break;
129 case V4L2_STD_NTSC_M:
130 name="NTSC-M"; break;
131 case V4L2_STD_NTSC_M_JP:
132 name="NTSC-M-JP"; break;
133 case V4L2_STD_NTSC_443:
134 name="NTSC-443"; break;
135 case V4L2_STD_NTSC_M_KR:
136 name="NTSC-M-KR"; break;
137 case V4L2_STD_SECAM:
138 name="SECAM"; break;
139 case V4L2_STD_SECAM_DK:
140 name="SECAM-DK"; break;
141 case V4L2_STD_SECAM_B:
142 name="SECAM-B"; break;
143 case V4L2_STD_SECAM_D:
144 name="SECAM-D"; break;
145 case V4L2_STD_SECAM_G:
146 name="SECAM-G"; break;
147 case V4L2_STD_SECAM_H:
148 name="SECAM-H"; break;
149 case V4L2_STD_SECAM_K:
150 name="SECAM-K"; break;
151 case V4L2_STD_SECAM_K1:
152 name="SECAM-K1"; break;
153 case V4L2_STD_SECAM_L:
154 name="SECAM-L"; break;
155 case V4L2_STD_SECAM_LC:
156 name="SECAM-LC"; break;
157 default:
158 name="Unknown"; break;
159 }
160
161 return name;
162 }
163
164 /* Fill in the fields of a v4l2_standard structure according to the
165 'id' and 'transmission' parameters. Returns negative on error. */
166 int v4l2_video_std_construct(struct v4l2_standard *vs,
167 int id, char *name)
168 {
169 u32 index = vs->index;
170
171 memset(vs, 0, sizeof(struct v4l2_standard));
172 vs->index = index;
173 vs->id = id;
174 if (id & V4L2_STD_525_60) {
175 vs->frameperiod.numerator = 1001;
176 vs->frameperiod.denominator = 30000;
177 vs->framelines = 525;
178 } else {
179 vs->frameperiod.numerator = 1;
180 vs->frameperiod.denominator = 25;
181 vs->framelines = 625;
182 }
183 strlcpy(vs->name,name,sizeof(vs->name));
184 return 0;
185 }
186
187 /* ----------------------------------------------------------------- */
188 /* priority handling */
189
190 #define V4L2_PRIO_VALID(val) (val == V4L2_PRIORITY_BACKGROUND || \
191 val == V4L2_PRIORITY_INTERACTIVE || \
192 val == V4L2_PRIORITY_RECORD)
193
194 int v4l2_prio_init(struct v4l2_prio_state *global)
195 {
196 memset(global,0,sizeof(*global));
197 return 0;
198 }
199
200 int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
201 enum v4l2_priority new)
202 {
203 if (!V4L2_PRIO_VALID(new))
204 return -EINVAL;
205 if (*local == new)
206 return 0;
207
208 atomic_inc(&global->prios[new]);
209 if (V4L2_PRIO_VALID(*local))
210 atomic_dec(&global->prios[*local]);
211 *local = new;
212 return 0;
213 }
214
215 int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local)
216 {
217 return v4l2_prio_change(global,local,V4L2_PRIORITY_DEFAULT);
218 }
219
220 int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local)
221 {
222 if (V4L2_PRIO_VALID(*local))
223 atomic_dec(&global->prios[*local]);
224 return 0;
225 }
226
227 enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global)
228 {
229 if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0)
230 return V4L2_PRIORITY_RECORD;
231 if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0)
232 return V4L2_PRIORITY_INTERACTIVE;
233 if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0)
234 return V4L2_PRIORITY_BACKGROUND;
235 return V4L2_PRIORITY_UNSET;
236 }
237
238 int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local)
239 {
240 if (*local < v4l2_prio_max(global))
241 return -EBUSY;
242 return 0;
243 }
244
245
246 /* ----------------------------------------------------------------- */
247 /* some arrays for pretty-printing debug messages of enum types */
248
249 char *v4l2_field_names[] = {
250 [V4L2_FIELD_ANY] = "any",
251 [V4L2_FIELD_NONE] = "none",
252 [V4L2_FIELD_TOP] = "top",
253 [V4L2_FIELD_BOTTOM] = "bottom",
254 [V4L2_FIELD_INTERLACED] = "interlaced",
255 [V4L2_FIELD_SEQ_TB] = "seq-tb",
256 [V4L2_FIELD_SEQ_BT] = "seq-bt",
257 [V4L2_FIELD_ALTERNATE] = "alternate",
258 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
259 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
260 };
261
262 char *v4l2_type_names[] = {
263 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "video-cap",
264 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "video-over",
265 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "video-out",
266 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
267 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
268 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
269 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
270 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
271 };
272
273
274 #define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
275
276 /* ------------------------------------------------------------------ */
277 /* debug help functions */
278
279 #ifdef CONFIG_VIDEO_V4L1_COMPAT
280 static const char *v4l1_ioctls[] = {
281 [_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP",
282 [_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN",
283 [_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN",
284 [_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER",
285 [_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER",
286 [_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT",
287 [_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT",
288 [_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE",
289 [_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN",
290 [_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN",
291 [_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF",
292 [_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF",
293 [_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY",
294 [_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ",
295 [_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ",
296 [_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO",
297 [_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO",
298 [_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC",
299 [_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE",
300 [_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF",
301 [_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT",
302 [_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE",
303 [_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE",
304 [_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE",
305 [_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
306 [_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO",
307 [_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
308 [_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT",
309 [_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT"
310 };
311 #define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
312 #endif
313
314 static const char *v4l2_ioctls[] = {
315 [_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
316 [_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
317 [_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
318 [_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
319 [_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
320 [_IOC_NR(VIDIOC_G_MPEGCOMP)] = "VIDIOC_G_MPEGCOMP",
321 [_IOC_NR(VIDIOC_S_MPEGCOMP)] = "VIDIOC_S_MPEGCOMP",
322 [_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
323 [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
324 [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
325 [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
326 [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
327 [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
328 [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
329 [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
330 [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
331 [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
332 [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
333 [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
334 [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
335 [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
336 [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
337 [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
338 [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
339 [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
340 [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
341 [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
342 [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
343 [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
344 [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
345 [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
346 [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
347 [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
348 [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
349 [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
350 [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
351 [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
352 [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
353 [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
354 [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
355 [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
356 [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
357 [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
358 [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
359 [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
360 [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
361 [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
362 [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
363 [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
364 [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
365 [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
366 [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
367 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
368 [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
369 [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
370 [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
371 [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
372 #if 1
373 [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
374 [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
375 [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
376 [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
377 [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
378
379 [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
380 [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
381
382 [_IOC_NR(VIDIOC_G_CHIP_IDENT)] = "VIDIOC_G_CHIP_IDENT",
383 #endif
384 };
385 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
386
387 static const char *v4l2_int_ioctls[] = {
388 #ifdef CONFIG_VIDEO_V4L1_COMPAT
389 [_IOC_NR(DECODER_GET_CAPABILITIES)] = "DECODER_GET_CAPABILITIES",
390 [_IOC_NR(DECODER_GET_STATUS)] = "DECODER_GET_STATUS",
391 [_IOC_NR(DECODER_SET_NORM)] = "DECODER_SET_NORM",
392 [_IOC_NR(DECODER_SET_INPUT)] = "DECODER_SET_INPUT",
393 [_IOC_NR(DECODER_SET_OUTPUT)] = "DECODER_SET_OUTPUT",
394 [_IOC_NR(DECODER_ENABLE_OUTPUT)] = "DECODER_ENABLE_OUTPUT",
395 [_IOC_NR(DECODER_SET_PICTURE)] = "DECODER_SET_PICTURE",
396 [_IOC_NR(DECODER_SET_GPIO)] = "DECODER_SET_GPIO",
397 [_IOC_NR(DECODER_INIT)] = "DECODER_INIT",
398 [_IOC_NR(DECODER_SET_VBI_BYPASS)] = "DECODER_SET_VBI_BYPASS",
399 [_IOC_NR(DECODER_DUMP)] = "DECODER_DUMP",
400 #endif
401 [_IOC_NR(AUDC_SET_RADIO)] = "AUDC_SET_RADIO",
402
403 [_IOC_NR(TUNER_SET_TYPE_ADDR)] = "TUNER_SET_TYPE_ADDR",
404 [_IOC_NR(TUNER_SET_STANDBY)] = "TUNER_SET_STANDBY",
405 [_IOC_NR(TDA9887_SET_CONFIG)] = "TDA9887_SET_CONFIG",
406
407 [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)] = "VIDIOC_INT_S_TUNER_MODE",
408 [_IOC_NR(VIDIOC_INT_RESET)] = "VIDIOC_INT_RESET",
409 [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
410 [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)] = "VIDIOC_INT_DECODE_VBI_LINE",
411 [_IOC_NR(VIDIOC_INT_S_VBI_DATA)] = "VIDIOC_INT_S_VBI_DATA",
412 [_IOC_NR(VIDIOC_INT_G_VBI_DATA)] = "VIDIOC_INT_G_VBI_DATA",
413 [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)] = "VIDIOC_INT_I2S_CLOCK_FREQ",
414 [_IOC_NR(VIDIOC_INT_S_STANDBY)] = "VIDIOC_INT_S_STANDBY",
415 [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)] = "VIDIOC_INT_S_AUDIO_ROUTING",
416 [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)] = "VIDIOC_INT_G_AUDIO_ROUTING",
417 [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)] = "VIDIOC_INT_S_VIDEO_ROUTING",
418 [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)] = "VIDIOC_INT_G_VIDEO_ROUTING",
419 [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)] = "VIDIOC_INT_S_CRYSTAL_FREQ",
420 [_IOC_NR(VIDIOC_INT_INIT)] = "VIDIOC_INT_INIT",
421 [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)] = "VIDIOC_INT_G_STD_OUTPUT",
422 [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)] = "VIDIOC_INT_S_STD_OUTPUT",
423 };
424 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
425
426
427 /* Common ioctl debug function. This function can be used by
428 external ioctl messages as well as internal V4L ioctl */
429 void v4l_printk_ioctl(unsigned int cmd)
430 {
431 char *dir;
432
433 switch (_IOC_DIR(cmd)) {
434 case _IOC_NONE: dir = "--"; break;
435 case _IOC_READ: dir = "r-"; break;
436 case _IOC_WRITE: dir = "-w"; break;
437 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
438 default: dir = "*ERR*"; break;
439 }
440 switch (_IOC_TYPE(cmd)) {
441 case 'd':
442 printk("v4l2_int ioctl %s, dir=%s (0x%08x)\n",
443 (_IOC_NR(cmd) < V4L2_INT_IOCTLS) ?
444 v4l2_int_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
445 break;
446 #ifdef CONFIG_VIDEO_V4L1_COMPAT
447 case 'v':
448 printk("v4l1 ioctl %s, dir=%s (0x%08x)\n",
449 (_IOC_NR(cmd) < V4L1_IOCTLS) ?
450 v4l1_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
451 break;
452 #endif
453 case 'V':
454 printk("v4l2 ioctl %s, dir=%s (0x%08x)\n",
455 (_IOC_NR(cmd) < V4L2_IOCTLS) ?
456 v4l2_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
457 break;
458
459 default:
460 printk("unknown ioctl '%c', dir=%s, #%d (0x%08x)\n",
461 _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
462 }
463 }
464
465
466 /* ----------------------------------------------------------------- */
467
468 /* Helper functions for control handling */
469
470 /* Check for correctness of the ctrl's value based on the data from
471 struct v4l2_queryctrl and the available menu items. Note that
472 menu_items may be NULL, in that case it is ignored. */
473 int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
474 const char **menu_items)
475 {
476 if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED)
477 return -EINVAL;
478 if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED)
479 return -EBUSY;
480 if (qctrl->type == V4L2_CTRL_TYPE_BUTTON ||
481 qctrl->type == V4L2_CTRL_TYPE_INTEGER64 ||
482 qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
483 return 0;
484 if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum)
485 return -ERANGE;
486 if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) {
487 if (menu_items[ctrl->value] == NULL ||
488 menu_items[ctrl->value][0] == '\0')
489 return -EINVAL;
490 }
491 return 0;
492 }
493
494 /* Returns NULL or a character pointer array containing the menu for
495 the given control ID. The pointer array ends with a NULL pointer.
496 An empty string signifies a menu entry that is invalid. This allows
497 drivers to disable certain options if it is not supported. */
498 const char **v4l2_ctrl_get_menu(u32 id)
499 {
500 static const char *mpeg_audio_sampling_freq[] = {
501 "44.1 kHz",
502 "48 kHz",
503 "32 kHz",
504 NULL
505 };
506 static const char *mpeg_audio_encoding[] = {
507 "Layer I",
508 "Layer II",
509 "Layer III",
510 NULL
511 };
512 static const char *mpeg_audio_l1_bitrate[] = {
513 "32 kbps",
514 "64 kbps",
515 "96 kbps",
516 "128 kbps",
517 "160 kbps",
518 "192 kbps",
519 "224 kbps",
520 "256 kbps",
521 "288 kbps",
522 "320 kbps",
523 "352 kbps",
524 "384 kbps",
525 "416 kbps",
526 "448 kbps",
527 NULL
528 };
529 static const char *mpeg_audio_l2_bitrate[] = {
530 "32 kbps",
531 "48 kbps",
532 "56 kbps",
533 "64 kbps",
534 "80 kbps",
535 "96 kbps",
536 "112 kbps",
537 "128 kbps",
538 "160 kbps",
539 "192 kbps",
540 "224 kbps",
541 "256 kbps",
542 "320 kbps",
543 "384 kbps",
544 NULL
545 };
546 static const char *mpeg_audio_l3_bitrate[] = {
547 "32 kbps",
548 "40 kbps",
549 "48 kbps",
550 "56 kbps",
551 "64 kbps",
552 "80 kbps",
553 "96 kbps",
554 "112 kbps",
555 "128 kbps",
556 "160 kbps",
557 "192 kbps",
558 "224 kbps",
559 "256 kbps",
560 "320 kbps",
561 NULL
562 };
563 static const char *mpeg_audio_mode[] = {
564 "Stereo",
565 "Joint Stereo",
566 "Dual",
567 "Mono",
568 NULL
569 };
570 static const char *mpeg_audio_mode_extension[] = {
571 "Bound 4",
572 "Bound 8",
573 "Bound 12",
574 "Bound 16",
575 NULL
576 };
577 static const char *mpeg_audio_emphasis[] = {
578 "No Emphasis",
579 "50/15 us",
580 "CCITT J17",
581 NULL
582 };
583 static const char *mpeg_audio_crc[] = {
584 "No CRC",
585 "16-bit CRC",
586 NULL
587 };
588 static const char *mpeg_video_encoding[] = {
589 "MPEG-1",
590 "MPEG-2",
591 NULL
592 };
593 static const char *mpeg_video_aspect[] = {
594 "1x1",
595 "4x3",
596 "16x9",
597 "2.21x1",
598 NULL
599 };
600 static const char *mpeg_video_bitrate_mode[] = {
601 "Variable Bitrate",
602 "Constant Bitrate",
603 NULL
604 };
605 static const char *mpeg_stream_type[] = {
606 "MPEG-2 Program Stream",
607 "MPEG-2 Transport Stream",
608 "MPEG-1 System Stream",
609 "MPEG-2 DVD-compatible Stream",
610 "MPEG-1 VCD-compatible Stream",
611 "MPEG-2 SVCD-compatible Stream",
612 NULL
613 };
614 static const char *mpeg_stream_vbi_fmt[] = {
615 "No VBI",
616 "Private packet, IVTV format",
617 NULL
618 };
619
620 switch (id) {
621 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
622 return mpeg_audio_sampling_freq;
623 case V4L2_CID_MPEG_AUDIO_ENCODING:
624 return mpeg_audio_encoding;
625 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
626 return mpeg_audio_l1_bitrate;
627 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
628 return mpeg_audio_l2_bitrate;
629 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
630 return mpeg_audio_l3_bitrate;
631 case V4L2_CID_MPEG_AUDIO_MODE:
632 return mpeg_audio_mode;
633 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
634 return mpeg_audio_mode_extension;
635 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
636 return mpeg_audio_emphasis;
637 case V4L2_CID_MPEG_AUDIO_CRC:
638 return mpeg_audio_crc;
639 case V4L2_CID_MPEG_VIDEO_ENCODING:
640 return mpeg_video_encoding;
641 case V4L2_CID_MPEG_VIDEO_ASPECT:
642 return mpeg_video_aspect;
643 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
644 return mpeg_video_bitrate_mode;
645 case V4L2_CID_MPEG_STREAM_TYPE:
646 return mpeg_stream_type;
647 case V4L2_CID_MPEG_STREAM_VBI_FMT:
648 return mpeg_stream_vbi_fmt;
649 default:
650 return NULL;
651 }
652 }
653
654 /* Fill in a struct v4l2_queryctrl */
655 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
656 {
657 const char *name;
658
659 qctrl->flags = 0;
660 switch (qctrl->id) {
661 /* USER controls */
662 case V4L2_CID_USER_CLASS: name = "User Controls"; break;
663 case V4L2_CID_AUDIO_VOLUME: name = "Volume"; break;
664 case V4L2_CID_AUDIO_MUTE: name = "Mute"; break;
665 case V4L2_CID_AUDIO_BALANCE: name = "Balance"; break;
666 case V4L2_CID_AUDIO_BASS: name = "Bass"; break;
667 case V4L2_CID_AUDIO_TREBLE: name = "Treble"; break;
668 case V4L2_CID_AUDIO_LOUDNESS: name = "Loudness"; break;
669 case V4L2_CID_BRIGHTNESS: name = "Brightness"; break;
670 case V4L2_CID_CONTRAST: name = "Contrast"; break;
671 case V4L2_CID_SATURATION: name = "Saturation"; break;
672 case V4L2_CID_HUE: name = "Hue"; break;
673
674 /* MPEG controls */
675 case V4L2_CID_MPEG_CLASS: name = "MPEG Encoder Controls"; break;
676 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: name = "Audio Sampling Frequency"; break;
677 case V4L2_CID_MPEG_AUDIO_ENCODING: name = "Audio Encoding Layer"; break;
678 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: name = "Audio Layer I Bitrate"; break;
679 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: name = "Audio Layer II Bitrate"; break;
680 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: name = "Audio Layer III Bitrate"; break;
681 case V4L2_CID_MPEG_AUDIO_MODE: name = "Audio Stereo Mode"; break;
682 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: name = "Audio Stereo Mode Extension"; break;
683 case V4L2_CID_MPEG_AUDIO_EMPHASIS: name = "Audio Emphasis"; break;
684 case V4L2_CID_MPEG_AUDIO_CRC: name = "Audio CRC"; break;
685 case V4L2_CID_MPEG_AUDIO_MUTE: name = "Audio Mute"; break;
686 case V4L2_CID_MPEG_VIDEO_ENCODING: name = "Video Encoding"; break;
687 case V4L2_CID_MPEG_VIDEO_ASPECT: name = "Video Aspect"; break;
688 case V4L2_CID_MPEG_VIDEO_B_FRAMES: name = "Video B Frames"; break;
689 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: name = "Video GOP Size"; break;
690 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: name = "Video GOP Closure"; break;
691 case V4L2_CID_MPEG_VIDEO_PULLDOWN: name = "Video Pulldown"; break;
692 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: name = "Video Bitrate Mode"; break;
693 case V4L2_CID_MPEG_VIDEO_BITRATE: name = "Video Bitrate"; break;
694 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: name = "Video Peak Bitrate"; break;
695 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: name = "Video Temporal Decimation"; break;
696 case V4L2_CID_MPEG_VIDEO_MUTE: name = "Video Mute"; break;
697 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: name = "Video Mute YUV"; break;
698 case V4L2_CID_MPEG_STREAM_TYPE: name = "Stream Type"; break;
699 case V4L2_CID_MPEG_STREAM_PID_PMT: name = "Stream PMT Program ID"; break;
700 case V4L2_CID_MPEG_STREAM_PID_AUDIO: name = "Stream Audio Program ID"; break;
701 case V4L2_CID_MPEG_STREAM_PID_VIDEO: name = "Stream Video Program ID"; break;
702 case V4L2_CID_MPEG_STREAM_PID_PCR: name = "Stream PCR Program ID"; break;
703 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: name = "Stream PES Audio ID"; break;
704 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: name = "Stream PES Video ID"; break;
705 case V4L2_CID_MPEG_STREAM_VBI_FMT: name = "Stream VBI Format"; break;
706
707 default:
708 return -EINVAL;
709 }
710 switch (qctrl->id) {
711 case V4L2_CID_AUDIO_MUTE:
712 case V4L2_CID_AUDIO_LOUDNESS:
713 case V4L2_CID_MPEG_AUDIO_MUTE:
714 case V4L2_CID_MPEG_VIDEO_MUTE:
715 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
716 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
717 qctrl->type = V4L2_CTRL_TYPE_BOOLEAN;
718 min = 0;
719 max = step = 1;
720 break;
721 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
722 case V4L2_CID_MPEG_AUDIO_ENCODING:
723 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
724 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
725 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
726 case V4L2_CID_MPEG_AUDIO_MODE:
727 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
728 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
729 case V4L2_CID_MPEG_AUDIO_CRC:
730 case V4L2_CID_MPEG_VIDEO_ENCODING:
731 case V4L2_CID_MPEG_VIDEO_ASPECT:
732 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
733 case V4L2_CID_MPEG_STREAM_TYPE:
734 case V4L2_CID_MPEG_STREAM_VBI_FMT:
735 qctrl->type = V4L2_CTRL_TYPE_MENU;
736 step = 1;
737 break;
738 case V4L2_CID_USER_CLASS:
739 case V4L2_CID_MPEG_CLASS:
740 qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
741 qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
742 min = max = step = def = 0;
743 break;
744 default:
745 qctrl->type = V4L2_CTRL_TYPE_INTEGER;
746 break;
747 }
748 switch (qctrl->id) {
749 case V4L2_CID_MPEG_AUDIO_ENCODING:
750 case V4L2_CID_MPEG_AUDIO_MODE:
751 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
752 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
753 case V4L2_CID_MPEG_STREAM_TYPE:
754 qctrl->flags |= V4L2_CTRL_FLAG_UPDATE;
755 break;
756 case V4L2_CID_AUDIO_VOLUME:
757 case V4L2_CID_AUDIO_BALANCE:
758 case V4L2_CID_AUDIO_BASS:
759 case V4L2_CID_AUDIO_TREBLE:
760 case V4L2_CID_BRIGHTNESS:
761 case V4L2_CID_CONTRAST:
762 case V4L2_CID_SATURATION:
763 case V4L2_CID_HUE:
764 qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
765 break;
766 }
767 qctrl->minimum = min;
768 qctrl->maximum = max;
769 qctrl->step = step;
770 qctrl->default_value = def;
771 qctrl->reserved[0] = qctrl->reserved[1] = 0;
772 snprintf(qctrl->name, sizeof(qctrl->name), name);
773 return 0;
774 }
775
776 /* Fill in a struct v4l2_queryctrl with standard values based on
777 the control ID. */
778 int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl)
779 {
780 switch (qctrl->id) {
781 /* USER controls */
782 case V4L2_CID_USER_CLASS:
783 case V4L2_CID_MPEG_CLASS:
784 return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0);
785 case V4L2_CID_AUDIO_VOLUME:
786 return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 58880);
787 case V4L2_CID_AUDIO_MUTE:
788 case V4L2_CID_AUDIO_LOUDNESS:
789 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
790 case V4L2_CID_AUDIO_BALANCE:
791 case V4L2_CID_AUDIO_BASS:
792 case V4L2_CID_AUDIO_TREBLE:
793 return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 32768);
794 case V4L2_CID_BRIGHTNESS:
795 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 128);
796 case V4L2_CID_CONTRAST:
797 case V4L2_CID_SATURATION:
798 return v4l2_ctrl_query_fill(qctrl, 0, 127, 1, 64);
799 case V4L2_CID_HUE:
800 return v4l2_ctrl_query_fill(qctrl, -128, 127, 1, 0);
801
802 /* MPEG controls */
803 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
804 return v4l2_ctrl_query_fill(qctrl,
805 V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100,
806 V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000, 1,
807 V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
808 case V4L2_CID_MPEG_AUDIO_ENCODING:
809 return v4l2_ctrl_query_fill(qctrl,
810 V4L2_MPEG_AUDIO_ENCODING_LAYER_1,
811 V4L2_MPEG_AUDIO_ENCODING_LAYER_3, 1,
812 V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
813 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
814 return v4l2_ctrl_query_fill(qctrl,
815 V4L2_MPEG_AUDIO_L1_BITRATE_32K,
816 V4L2_MPEG_AUDIO_L1_BITRATE_448K, 1,
817 V4L2_MPEG_AUDIO_L1_BITRATE_256K);
818 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
819 return v4l2_ctrl_query_fill(qctrl,
820 V4L2_MPEG_AUDIO_L2_BITRATE_32K,
821 V4L2_MPEG_AUDIO_L2_BITRATE_384K, 1,
822 V4L2_MPEG_AUDIO_L2_BITRATE_224K);
823 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
824 return v4l2_ctrl_query_fill(qctrl,
825 V4L2_MPEG_AUDIO_L3_BITRATE_32K,
826 V4L2_MPEG_AUDIO_L3_BITRATE_320K, 1,
827 V4L2_MPEG_AUDIO_L3_BITRATE_192K);
828 case V4L2_CID_MPEG_AUDIO_MODE:
829 return v4l2_ctrl_query_fill(qctrl,
830 V4L2_MPEG_AUDIO_MODE_STEREO,
831 V4L2_MPEG_AUDIO_MODE_MONO, 1,
832 V4L2_MPEG_AUDIO_MODE_STEREO);
833 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
834 return v4l2_ctrl_query_fill(qctrl,
835 V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4,
836 V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16, 1,
837 V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4);
838 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
839 return v4l2_ctrl_query_fill(qctrl,
840 V4L2_MPEG_AUDIO_EMPHASIS_NONE,
841 V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17, 1,
842 V4L2_MPEG_AUDIO_EMPHASIS_NONE);
843 case V4L2_CID_MPEG_AUDIO_CRC:
844 return v4l2_ctrl_query_fill(qctrl,
845 V4L2_MPEG_AUDIO_CRC_NONE,
846 V4L2_MPEG_AUDIO_CRC_CRC16, 1,
847 V4L2_MPEG_AUDIO_CRC_NONE);
848 case V4L2_CID_MPEG_AUDIO_MUTE:
849 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
850 case V4L2_CID_MPEG_VIDEO_ENCODING:
851 return v4l2_ctrl_query_fill(qctrl,
852 V4L2_MPEG_VIDEO_ENCODING_MPEG_1,
853 V4L2_MPEG_VIDEO_ENCODING_MPEG_2, 1,
854 V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
855 case V4L2_CID_MPEG_VIDEO_ASPECT:
856 return v4l2_ctrl_query_fill(qctrl,
857 V4L2_MPEG_VIDEO_ASPECT_1x1,
858 V4L2_MPEG_VIDEO_ASPECT_221x100, 1,
859 V4L2_MPEG_VIDEO_ASPECT_4x3);
860 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
861 return v4l2_ctrl_query_fill(qctrl, 0, 33, 1, 2);
862 case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
863 return v4l2_ctrl_query_fill(qctrl, 1, 34, 1, 12);
864 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
865 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 1);
866 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
867 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
868 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
869 return v4l2_ctrl_query_fill(qctrl,
870 V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
871 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 1,
872 V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
873 case V4L2_CID_MPEG_VIDEO_BITRATE:
874 return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 6000000);
875 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
876 return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 8000000);
877 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION:
878 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
879 case V4L2_CID_MPEG_VIDEO_MUTE:
880 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
881 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: /* Init YUV (really YCbCr) to black */
882 return v4l2_ctrl_query_fill(qctrl, 0, 0xffffff, 1, 0x008080);
883 case V4L2_CID_MPEG_STREAM_TYPE:
884 return v4l2_ctrl_query_fill(qctrl,
885 V4L2_MPEG_STREAM_TYPE_MPEG2_PS,
886 V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD, 1,
887 V4L2_MPEG_STREAM_TYPE_MPEG2_PS);
888 case V4L2_CID_MPEG_STREAM_PID_PMT:
889 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 16);
890 case V4L2_CID_MPEG_STREAM_PID_AUDIO:
891 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 260);
892 case V4L2_CID_MPEG_STREAM_PID_VIDEO:
893 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 256);
894 case V4L2_CID_MPEG_STREAM_PID_PCR:
895 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 259);
896 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO:
897 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
898 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO:
899 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
900 case V4L2_CID_MPEG_STREAM_VBI_FMT:
901 return v4l2_ctrl_query_fill(qctrl,
902 V4L2_MPEG_STREAM_VBI_FMT_NONE,
903 V4L2_MPEG_STREAM_VBI_FMT_IVTV, 1,
904 V4L2_MPEG_STREAM_VBI_FMT_NONE);
905 default:
906 return -EINVAL;
907 }
908 }
909
910 /* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and
911 the menu. The qctrl pointer may be NULL, in which case it is ignored. */
912 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl,
913 const char **menu_items)
914 {
915 int i;
916
917 if (menu_items == NULL ||
918 (qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum)))
919 return -EINVAL;
920 for (i = 0; i < qmenu->index && menu_items[i]; i++) ;
921 if (menu_items[i] == NULL || menu_items[i][0] == '\0')
922 return -EINVAL;
923 snprintf(qmenu->name, sizeof(qmenu->name), menu_items[qmenu->index]);
924 qmenu->reserved = 0;
925 return 0;
926 }
927
928 /* ctrl_classes points to an array of u32 pointers, the last element is
929 a NULL pointer. Each u32 array is a 0-terminated array of control IDs.
930 Each array must be sorted low to high and belong to the same control
931 class. The array of u32 pointer must also be sorted, from low class IDs
932 to high class IDs.
933
934 This function returns the first ID that follows after the given ID.
935 When no more controls are available 0 is returned. */
936 u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
937 {
938 u32 ctrl_class = V4L2_CTRL_ID2CLASS(id);
939 const u32 *pctrl;
940
941 if (ctrl_classes == NULL)
942 return 0;
943
944 /* if no query is desired, then check if the ID is part of ctrl_classes */
945 if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) {
946 /* find class */
947 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class)
948 ctrl_classes++;
949 if (*ctrl_classes == NULL)
950 return 0;
951 pctrl = *ctrl_classes;
952 /* find control ID */
953 while (*pctrl && *pctrl != id) pctrl++;
954 return *pctrl ? id : 0;
955 }
956 id &= V4L2_CTRL_ID_MASK;
957 id++; /* select next control */
958 /* find first class that matches (or is greater than) the class of
959 the ID */
960 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class)
961 ctrl_classes++;
962 /* no more classes */
963 if (*ctrl_classes == NULL)
964 return 0;
965 pctrl = *ctrl_classes;
966 /* find first ctrl within the class that is >= ID */
967 while (*pctrl && *pctrl < id) pctrl++;
968 if (*pctrl)
969 return *pctrl;
970 /* we are at the end of the controls of the current class. */
971 /* continue with next class if available */
972 ctrl_classes++;
973 if (*ctrl_classes == NULL)
974 return 0;
975 return **ctrl_classes;
976 }
977
978 int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 match_type, u32 match_chip)
979 {
980 switch (match_type) {
981 case V4L2_CHIP_MATCH_I2C_DRIVER:
982 return (c != NULL && c->driver != NULL && c->driver->id == match_chip);
983 case V4L2_CHIP_MATCH_I2C_ADDR:
984 return (c != NULL && c->addr == match_chip);
985 default:
986 return 0;
987 }
988 }
989
990 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip,
991 u32 ident, u32 revision)
992 {
993 if (!v4l2_chip_match_i2c_client(c, chip->match_type, chip->match_chip))
994 return 0;
995 if (chip->ident == V4L2_IDENT_NONE) {
996 chip->ident = ident;
997 chip->revision = revision;
998 }
999 else {
1000 chip->ident = V4L2_IDENT_AMBIGUOUS;
1001 chip->revision = 0;
1002 }
1003 return 0;
1004 }
1005
1006 int v4l2_chip_match_host(u32 match_type, u32 match_chip)
1007 {
1008 switch (match_type) {
1009 case V4L2_CHIP_MATCH_HOST:
1010 return match_chip == 0;
1011 default:
1012 return 0;
1013 }
1014 }
1015
1016 /* ----------------------------------------------------------------- */
1017
1018 EXPORT_SYMBOL(v4l2_norm_to_name);
1019 EXPORT_SYMBOL(v4l2_video_std_construct);
1020
1021 EXPORT_SYMBOL(v4l2_prio_init);
1022 EXPORT_SYMBOL(v4l2_prio_change);
1023 EXPORT_SYMBOL(v4l2_prio_open);
1024 EXPORT_SYMBOL(v4l2_prio_close);
1025 EXPORT_SYMBOL(v4l2_prio_max);
1026 EXPORT_SYMBOL(v4l2_prio_check);
1027
1028 EXPORT_SYMBOL(v4l2_field_names);
1029 EXPORT_SYMBOL(v4l2_type_names);
1030 EXPORT_SYMBOL(v4l_printk_ioctl);
1031
1032 EXPORT_SYMBOL(v4l2_ctrl_next);
1033 EXPORT_SYMBOL(v4l2_ctrl_check);
1034 EXPORT_SYMBOL(v4l2_ctrl_get_menu);
1035 EXPORT_SYMBOL(v4l2_ctrl_query_menu);
1036 EXPORT_SYMBOL(v4l2_ctrl_query_fill);
1037 EXPORT_SYMBOL(v4l2_ctrl_query_fill_std);
1038
1039 EXPORT_SYMBOL(v4l2_chip_match_i2c_client);
1040 EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
1041 EXPORT_SYMBOL(v4l2_chip_match_host);
1042
1043 /*
1044 * Local variables:
1045 * c-basic-offset: 8
1046 * End:
1047 */
Support for the Chinese Samsung S3C2440 based development boards