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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / media / video / v4l2-common.c
blobc056ff6d810c8e4d18026529d4aa96caad8ba5fa
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_REQBUFS)] = "VIDIOC_REQBUFS",
321 [_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
322 [_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
323 [_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
324 [_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
325 [_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
326 [_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
327 [_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
328 [_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
329 [_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
330 [_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
331 [_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
332 [_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
333 [_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
334 [_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
335 [_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
336 [_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
337 [_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
338 [_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
339 [_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
340 [_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
341 [_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
342 [_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
343 [_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
344 [_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
345 [_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
346 [_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
347 [_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
348 [_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
349 [_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
350 [_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
351 [_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
352 [_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
353 [_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
354 [_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
355 [_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
356 [_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
357 [_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
358 [_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
359 [_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
360 [_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
361 [_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
362 [_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
363 [_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
364 [_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
365 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
366 [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
367 [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
368 [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
369 [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
370 #if 1
371 [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
372 [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
373 [_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
374 [_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
375 [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
376
377 [_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
378 [_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
379
380 [_IOC_NR(VIDIOC_G_CHIP_IDENT)] = "VIDIOC_G_CHIP_IDENT",
381 #endif
382 };
383 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
384
385 static const char *v4l2_int_ioctls[] = {
386 #ifdef CONFIG_VIDEO_V4L1_COMPAT
387 [_IOC_NR(DECODER_GET_CAPABILITIES)] = "DECODER_GET_CAPABILITIES",
388 [_IOC_NR(DECODER_GET_STATUS)] = "DECODER_GET_STATUS",
389 [_IOC_NR(DECODER_SET_NORM)] = "DECODER_SET_NORM",
390 [_IOC_NR(DECODER_SET_INPUT)] = "DECODER_SET_INPUT",
391 [_IOC_NR(DECODER_SET_OUTPUT)] = "DECODER_SET_OUTPUT",
392 [_IOC_NR(DECODER_ENABLE_OUTPUT)] = "DECODER_ENABLE_OUTPUT",
393 [_IOC_NR(DECODER_SET_PICTURE)] = "DECODER_SET_PICTURE",
394 [_IOC_NR(DECODER_SET_GPIO)] = "DECODER_SET_GPIO",
395 [_IOC_NR(DECODER_INIT)] = "DECODER_INIT",
396 [_IOC_NR(DECODER_SET_VBI_BYPASS)] = "DECODER_SET_VBI_BYPASS",
397 [_IOC_NR(DECODER_DUMP)] = "DECODER_DUMP",
398 #endif
399 [_IOC_NR(AUDC_SET_RADIO)] = "AUDC_SET_RADIO",
400
401 [_IOC_NR(TUNER_SET_TYPE_ADDR)] = "TUNER_SET_TYPE_ADDR",
402 [_IOC_NR(TUNER_SET_STANDBY)] = "TUNER_SET_STANDBY",
403 [_IOC_NR(TUNER_SET_CONFIG)] = "TUNER_SET_CONFIG",
404
405 [_IOC_NR(VIDIOC_INT_S_TUNER_MODE)] = "VIDIOC_INT_S_TUNER_MODE",
406 [_IOC_NR(VIDIOC_INT_RESET)] = "VIDIOC_INT_RESET",
407 [_IOC_NR(VIDIOC_INT_AUDIO_CLOCK_FREQ)] = "VIDIOC_INT_AUDIO_CLOCK_FREQ",
408 [_IOC_NR(VIDIOC_INT_DECODE_VBI_LINE)] = "VIDIOC_INT_DECODE_VBI_LINE",
409 [_IOC_NR(VIDIOC_INT_S_VBI_DATA)] = "VIDIOC_INT_S_VBI_DATA",
410 [_IOC_NR(VIDIOC_INT_G_VBI_DATA)] = "VIDIOC_INT_G_VBI_DATA",
411 [_IOC_NR(VIDIOC_INT_I2S_CLOCK_FREQ)] = "VIDIOC_INT_I2S_CLOCK_FREQ",
412 [_IOC_NR(VIDIOC_INT_S_STANDBY)] = "VIDIOC_INT_S_STANDBY",
413 [_IOC_NR(VIDIOC_INT_S_AUDIO_ROUTING)] = "VIDIOC_INT_S_AUDIO_ROUTING",
414 [_IOC_NR(VIDIOC_INT_G_AUDIO_ROUTING)] = "VIDIOC_INT_G_AUDIO_ROUTING",
415 [_IOC_NR(VIDIOC_INT_S_VIDEO_ROUTING)] = "VIDIOC_INT_S_VIDEO_ROUTING",
416 [_IOC_NR(VIDIOC_INT_G_VIDEO_ROUTING)] = "VIDIOC_INT_G_VIDEO_ROUTING",
417 [_IOC_NR(VIDIOC_INT_S_CRYSTAL_FREQ)] = "VIDIOC_INT_S_CRYSTAL_FREQ",
418 [_IOC_NR(VIDIOC_INT_INIT)] = "VIDIOC_INT_INIT",
419 [_IOC_NR(VIDIOC_INT_G_STD_OUTPUT)] = "VIDIOC_INT_G_STD_OUTPUT",
420 [_IOC_NR(VIDIOC_INT_S_STD_OUTPUT)] = "VIDIOC_INT_S_STD_OUTPUT",
421 };
422 #define V4L2_INT_IOCTLS ARRAY_SIZE(v4l2_int_ioctls)
423
424
425 /* Common ioctl debug function. This function can be used by
426 external ioctl messages as well as internal V4L ioctl */
427 void v4l_printk_ioctl(unsigned int cmd)
428 {
429 char *dir;
430
431 switch (_IOC_DIR(cmd)) {
432 case _IOC_NONE: dir = "--"; break;
433 case _IOC_READ: dir = "r-"; break;
434 case _IOC_WRITE: dir = "-w"; break;
435 case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
436 default: dir = "*ERR*"; break;
437 }
438 switch (_IOC_TYPE(cmd)) {
439 case 'd':
440 printk("v4l2_int ioctl %s, dir=%s (0x%08x)\n",
441 (_IOC_NR(cmd) < V4L2_INT_IOCTLS) ?
442 v4l2_int_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
443 break;
444 #ifdef CONFIG_VIDEO_V4L1_COMPAT
445 case 'v':
446 printk("v4l1 ioctl %s, dir=%s (0x%08x)\n",
447 (_IOC_NR(cmd) < V4L1_IOCTLS) ?
448 v4l1_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
449 break;
450 #endif
451 case 'V':
452 printk("v4l2 ioctl %s, dir=%s (0x%08x)\n",
453 (_IOC_NR(cmd) < V4L2_IOCTLS) ?
454 v4l2_ioctls[_IOC_NR(cmd)] : "UNKNOWN", dir, cmd);
455 break;
456
457 default:
458 printk("unknown ioctl '%c', dir=%s, #%d (0x%08x)\n",
459 _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
460 }
461 }
462
463
464 /* ----------------------------------------------------------------- */
465
466 /* Helper functions for control handling */
467
468 /* Check for correctness of the ctrl's value based on the data from
469 struct v4l2_queryctrl and the available menu items. Note that
470 menu_items may be NULL, in that case it is ignored. */
471 int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
472 const char **menu_items)
473 {
474 if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED)
475 return -EINVAL;
476 if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED)
477 return -EBUSY;
478 if (qctrl->type == V4L2_CTRL_TYPE_BUTTON ||
479 qctrl->type == V4L2_CTRL_TYPE_INTEGER64 ||
480 qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
481 return 0;
482 if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum)
483 return -ERANGE;
484 if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) {
485 if (menu_items[ctrl->value] == NULL ||
486 menu_items[ctrl->value][0] == '\0')
487 return -EINVAL;
488 }
489 return 0;
490 }
491
492 /* Returns NULL or a character pointer array containing the menu for
493 the given control ID. The pointer array ends with a NULL pointer.
494 An empty string signifies a menu entry that is invalid. This allows
495 drivers to disable certain options if it is not supported. */
496 const char **v4l2_ctrl_get_menu(u32 id)
497 {
498 static const char *mpeg_audio_sampling_freq[] = {
499 "44.1 kHz",
500 "48 kHz",
501 "32 kHz",
502 NULL
503 };
504 static const char *mpeg_audio_encoding[] = {
505 "Layer I",
506 "Layer II",
507 "Layer III",
508 NULL
509 };
510 static const char *mpeg_audio_l1_bitrate[] = {
511 "32 kbps",
512 "64 kbps",
513 "96 kbps",
514 "128 kbps",
515 "160 kbps",
516 "192 kbps",
517 "224 kbps",
518 "256 kbps",
519 "288 kbps",
520 "320 kbps",
521 "352 kbps",
522 "384 kbps",
523 "416 kbps",
524 "448 kbps",
525 NULL
526 };
527 static const char *mpeg_audio_l2_bitrate[] = {
528 "32 kbps",
529 "48 kbps",
530 "56 kbps",
531 "64 kbps",
532 "80 kbps",
533 "96 kbps",
534 "112 kbps",
535 "128 kbps",
536 "160 kbps",
537 "192 kbps",
538 "224 kbps",
539 "256 kbps",
540 "320 kbps",
541 "384 kbps",
542 NULL
543 };
544 static const char *mpeg_audio_l3_bitrate[] = {
545 "32 kbps",
546 "40 kbps",
547 "48 kbps",
548 "56 kbps",
549 "64 kbps",
550 "80 kbps",
551 "96 kbps",
552 "112 kbps",
553 "128 kbps",
554 "160 kbps",
555 "192 kbps",
556 "224 kbps",
557 "256 kbps",
558 "320 kbps",
559 NULL
560 };
561 static const char *mpeg_audio_mode[] = {
562 "Stereo",
563 "Joint Stereo",
564 "Dual",
565 "Mono",
566 NULL
567 };
568 static const char *mpeg_audio_mode_extension[] = {
569 "Bound 4",
570 "Bound 8",
571 "Bound 12",
572 "Bound 16",
573 NULL
574 };
575 static const char *mpeg_audio_emphasis[] = {
576 "No Emphasis",
577 "50/15 us",
578 "CCITT J17",
579 NULL
580 };
581 static const char *mpeg_audio_crc[] = {
582 "No CRC",
583 "16-bit CRC",
584 NULL
585 };
586 static const char *mpeg_video_encoding[] = {
587 "MPEG-1",
588 "MPEG-2",
589 NULL
590 };
591 static const char *mpeg_video_aspect[] = {
592 "1x1",
593 "4x3",
594 "16x9",
595 "2.21x1",
596 NULL
597 };
598 static const char *mpeg_video_bitrate_mode[] = {
599 "Variable Bitrate",
600 "Constant Bitrate",
601 NULL
602 };
603 static const char *mpeg_stream_type[] = {
604 "MPEG-2 Program Stream",
605 "MPEG-2 Transport Stream",
606 "MPEG-1 System Stream",
607 "MPEG-2 DVD-compatible Stream",
608 "MPEG-1 VCD-compatible Stream",
609 "MPEG-2 SVCD-compatible Stream",
610 NULL
611 };
612 static const char *mpeg_stream_vbi_fmt[] = {
613 "No VBI",
614 "Private packet, IVTV format",
615 NULL
616 };
617
618 switch (id) {
619 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
620 return mpeg_audio_sampling_freq;
621 case V4L2_CID_MPEG_AUDIO_ENCODING:
622 return mpeg_audio_encoding;
623 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
624 return mpeg_audio_l1_bitrate;
625 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
626 return mpeg_audio_l2_bitrate;
627 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
628 return mpeg_audio_l3_bitrate;
629 case V4L2_CID_MPEG_AUDIO_MODE:
630 return mpeg_audio_mode;
631 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
632 return mpeg_audio_mode_extension;
633 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
634 return mpeg_audio_emphasis;
635 case V4L2_CID_MPEG_AUDIO_CRC:
636 return mpeg_audio_crc;
637 case V4L2_CID_MPEG_VIDEO_ENCODING:
638 return mpeg_video_encoding;
639 case V4L2_CID_MPEG_VIDEO_ASPECT:
640 return mpeg_video_aspect;
641 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
642 return mpeg_video_bitrate_mode;
643 case V4L2_CID_MPEG_STREAM_TYPE:
644 return mpeg_stream_type;
645 case V4L2_CID_MPEG_STREAM_VBI_FMT:
646 return mpeg_stream_vbi_fmt;
647 default:
648 return NULL;
649 }
650 }
651
652 /* Fill in a struct v4l2_queryctrl */
653 int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
654 {
655 const char *name;
656
657 qctrl->flags = 0;
658 switch (qctrl->id) {
659 /* USER controls */
660 case V4L2_CID_USER_CLASS: name = "User Controls"; break;
661 case V4L2_CID_AUDIO_VOLUME: name = "Volume"; break;
662 case V4L2_CID_AUDIO_MUTE: name = "Mute"; break;
663 case V4L2_CID_AUDIO_BALANCE: name = "Balance"; break;
664 case V4L2_CID_AUDIO_BASS: name = "Bass"; break;
665 case V4L2_CID_AUDIO_TREBLE: name = "Treble"; break;
666 case V4L2_CID_AUDIO_LOUDNESS: name = "Loudness"; break;
667 case V4L2_CID_BRIGHTNESS: name = "Brightness"; break;
668 case V4L2_CID_CONTRAST: name = "Contrast"; break;
669 case V4L2_CID_SATURATION: name = "Saturation"; break;
670 case V4L2_CID_HUE: name = "Hue"; break;
671
672 /* MPEG controls */
673 case V4L2_CID_MPEG_CLASS: name = "MPEG Encoder Controls"; break;
674 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: name = "Audio Sampling Frequency"; break;
675 case V4L2_CID_MPEG_AUDIO_ENCODING: name = "Audio Encoding Layer"; break;
676 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: name = "Audio Layer I Bitrate"; break;
677 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: name = "Audio Layer II Bitrate"; break;
678 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: name = "Audio Layer III Bitrate"; break;
679 case V4L2_CID_MPEG_AUDIO_MODE: name = "Audio Stereo Mode"; break;
680 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: name = "Audio Stereo Mode Extension"; break;
681 case V4L2_CID_MPEG_AUDIO_EMPHASIS: name = "Audio Emphasis"; break;
682 case V4L2_CID_MPEG_AUDIO_CRC: name = "Audio CRC"; break;
683 case V4L2_CID_MPEG_AUDIO_MUTE: name = "Audio Mute"; break;
684 case V4L2_CID_MPEG_VIDEO_ENCODING: name = "Video Encoding"; break;
685 case V4L2_CID_MPEG_VIDEO_ASPECT: name = "Video Aspect"; break;
686 case V4L2_CID_MPEG_VIDEO_B_FRAMES: name = "Video B Frames"; break;
687 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: name = "Video GOP Size"; break;
688 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: name = "Video GOP Closure"; break;
689 case V4L2_CID_MPEG_VIDEO_PULLDOWN: name = "Video Pulldown"; break;
690 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: name = "Video Bitrate Mode"; break;
691 case V4L2_CID_MPEG_VIDEO_BITRATE: name = "Video Bitrate"; break;
692 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: name = "Video Peak Bitrate"; break;
693 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: name = "Video Temporal Decimation"; break;
694 case V4L2_CID_MPEG_VIDEO_MUTE: name = "Video Mute"; break;
695 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: name = "Video Mute YUV"; break;
696 case V4L2_CID_MPEG_STREAM_TYPE: name = "Stream Type"; break;
697 case V4L2_CID_MPEG_STREAM_PID_PMT: name = "Stream PMT Program ID"; break;
698 case V4L2_CID_MPEG_STREAM_PID_AUDIO: name = "Stream Audio Program ID"; break;
699 case V4L2_CID_MPEG_STREAM_PID_VIDEO: name = "Stream Video Program ID"; break;
700 case V4L2_CID_MPEG_STREAM_PID_PCR: name = "Stream PCR Program ID"; break;
701 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: name = "Stream PES Audio ID"; break;
702 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: name = "Stream PES Video ID"; break;
703 case V4L2_CID_MPEG_STREAM_VBI_FMT: name = "Stream VBI Format"; break;
704
705 default:
706 return -EINVAL;
707 }
708 switch (qctrl->id) {
709 case V4L2_CID_AUDIO_MUTE:
710 case V4L2_CID_AUDIO_LOUDNESS:
711 case V4L2_CID_MPEG_AUDIO_MUTE:
712 case V4L2_CID_MPEG_VIDEO_MUTE:
713 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
714 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
715 qctrl->type = V4L2_CTRL_TYPE_BOOLEAN;
716 min = 0;
717 max = step = 1;
718 break;
719 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
720 case V4L2_CID_MPEG_AUDIO_ENCODING:
721 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
722 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
723 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
724 case V4L2_CID_MPEG_AUDIO_MODE:
725 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
726 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
727 case V4L2_CID_MPEG_AUDIO_CRC:
728 case V4L2_CID_MPEG_VIDEO_ENCODING:
729 case V4L2_CID_MPEG_VIDEO_ASPECT:
730 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
731 case V4L2_CID_MPEG_STREAM_TYPE:
732 case V4L2_CID_MPEG_STREAM_VBI_FMT:
733 qctrl->type = V4L2_CTRL_TYPE_MENU;
734 step = 1;
735 break;
736 case V4L2_CID_USER_CLASS:
737 case V4L2_CID_MPEG_CLASS:
738 qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS;
739 qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
740 min = max = step = def = 0;
741 break;
742 default:
743 qctrl->type = V4L2_CTRL_TYPE_INTEGER;
744 break;
745 }
746 switch (qctrl->id) {
747 case V4L2_CID_MPEG_AUDIO_ENCODING:
748 case V4L2_CID_MPEG_AUDIO_MODE:
749 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
750 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
751 case V4L2_CID_MPEG_STREAM_TYPE:
752 qctrl->flags |= V4L2_CTRL_FLAG_UPDATE;
753 break;
754 case V4L2_CID_AUDIO_VOLUME:
755 case V4L2_CID_AUDIO_BALANCE:
756 case V4L2_CID_AUDIO_BASS:
757 case V4L2_CID_AUDIO_TREBLE:
758 case V4L2_CID_BRIGHTNESS:
759 case V4L2_CID_CONTRAST:
760 case V4L2_CID_SATURATION:
761 case V4L2_CID_HUE:
762 qctrl->flags |= V4L2_CTRL_FLAG_SLIDER;
763 break;
764 }
765 qctrl->minimum = min;
766 qctrl->maximum = max;
767 qctrl->step = step;
768 qctrl->default_value = def;
769 qctrl->reserved[0] = qctrl->reserved[1] = 0;
770 snprintf(qctrl->name, sizeof(qctrl->name), name);
771 return 0;
772 }
773
774 /* Fill in a struct v4l2_queryctrl with standard values based on
775 the control ID. */
776 int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl)
777 {
778 switch (qctrl->id) {
779 /* USER controls */
780 case V4L2_CID_USER_CLASS:
781 case V4L2_CID_MPEG_CLASS:
782 return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0);
783 case V4L2_CID_AUDIO_VOLUME:
784 return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 58880);
785 case V4L2_CID_AUDIO_MUTE:
786 case V4L2_CID_AUDIO_LOUDNESS:
787 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
788 case V4L2_CID_AUDIO_BALANCE:
789 case V4L2_CID_AUDIO_BASS:
790 case V4L2_CID_AUDIO_TREBLE:
791 return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 32768);
792 case V4L2_CID_BRIGHTNESS:
793 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 128);
794 case V4L2_CID_CONTRAST:
795 case V4L2_CID_SATURATION:
796 return v4l2_ctrl_query_fill(qctrl, 0, 127, 1, 64);
797 case V4L2_CID_HUE:
798 return v4l2_ctrl_query_fill(qctrl, -128, 127, 1, 0);
799
800 /* MPEG controls */
801 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
802 return v4l2_ctrl_query_fill(qctrl,
803 V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100,
804 V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000, 1,
805 V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
806 case V4L2_CID_MPEG_AUDIO_ENCODING:
807 return v4l2_ctrl_query_fill(qctrl,
808 V4L2_MPEG_AUDIO_ENCODING_LAYER_1,
809 V4L2_MPEG_AUDIO_ENCODING_LAYER_3, 1,
810 V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
811 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
812 return v4l2_ctrl_query_fill(qctrl,
813 V4L2_MPEG_AUDIO_L1_BITRATE_32K,
814 V4L2_MPEG_AUDIO_L1_BITRATE_448K, 1,
815 V4L2_MPEG_AUDIO_L1_BITRATE_256K);
816 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
817 return v4l2_ctrl_query_fill(qctrl,
818 V4L2_MPEG_AUDIO_L2_BITRATE_32K,
819 V4L2_MPEG_AUDIO_L2_BITRATE_384K, 1,
820 V4L2_MPEG_AUDIO_L2_BITRATE_224K);
821 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
822 return v4l2_ctrl_query_fill(qctrl,
823 V4L2_MPEG_AUDIO_L3_BITRATE_32K,
824 V4L2_MPEG_AUDIO_L3_BITRATE_320K, 1,
825 V4L2_MPEG_AUDIO_L3_BITRATE_192K);
826 case V4L2_CID_MPEG_AUDIO_MODE:
827 return v4l2_ctrl_query_fill(qctrl,
828 V4L2_MPEG_AUDIO_MODE_STEREO,
829 V4L2_MPEG_AUDIO_MODE_MONO, 1,
830 V4L2_MPEG_AUDIO_MODE_STEREO);
831 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
832 return v4l2_ctrl_query_fill(qctrl,
833 V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4,
834 V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16, 1,
835 V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4);
836 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
837 return v4l2_ctrl_query_fill(qctrl,
838 V4L2_MPEG_AUDIO_EMPHASIS_NONE,
839 V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17, 1,
840 V4L2_MPEG_AUDIO_EMPHASIS_NONE);
841 case V4L2_CID_MPEG_AUDIO_CRC:
842 return v4l2_ctrl_query_fill(qctrl,
843 V4L2_MPEG_AUDIO_CRC_NONE,
844 V4L2_MPEG_AUDIO_CRC_CRC16, 1,
845 V4L2_MPEG_AUDIO_CRC_NONE);
846 case V4L2_CID_MPEG_AUDIO_MUTE:
847 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
848 case V4L2_CID_MPEG_VIDEO_ENCODING:
849 return v4l2_ctrl_query_fill(qctrl,
850 V4L2_MPEG_VIDEO_ENCODING_MPEG_1,
851 V4L2_MPEG_VIDEO_ENCODING_MPEG_2, 1,
852 V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
853 case V4L2_CID_MPEG_VIDEO_ASPECT:
854 return v4l2_ctrl_query_fill(qctrl,
855 V4L2_MPEG_VIDEO_ASPECT_1x1,
856 V4L2_MPEG_VIDEO_ASPECT_221x100, 1,
857 V4L2_MPEG_VIDEO_ASPECT_4x3);
858 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
859 return v4l2_ctrl_query_fill(qctrl, 0, 33, 1, 2);
860 case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
861 return v4l2_ctrl_query_fill(qctrl, 1, 34, 1, 12);
862 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
863 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 1);
864 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
865 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
866 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
867 return v4l2_ctrl_query_fill(qctrl,
868 V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
869 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 1,
870 V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
871 case V4L2_CID_MPEG_VIDEO_BITRATE:
872 return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 6000000);
873 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
874 return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 8000000);
875 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION:
876 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
877 case V4L2_CID_MPEG_VIDEO_MUTE:
878 return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0);
879 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: /* Init YUV (really YCbCr) to black */
880 return v4l2_ctrl_query_fill(qctrl, 0, 0xffffff, 1, 0x008080);
881 case V4L2_CID_MPEG_STREAM_TYPE:
882 return v4l2_ctrl_query_fill(qctrl,
883 V4L2_MPEG_STREAM_TYPE_MPEG2_PS,
884 V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD, 1,
885 V4L2_MPEG_STREAM_TYPE_MPEG2_PS);
886 case V4L2_CID_MPEG_STREAM_PID_PMT:
887 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 16);
888 case V4L2_CID_MPEG_STREAM_PID_AUDIO:
889 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 260);
890 case V4L2_CID_MPEG_STREAM_PID_VIDEO:
891 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 256);
892 case V4L2_CID_MPEG_STREAM_PID_PCR:
893 return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 259);
894 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO:
895 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
896 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO:
897 return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0);
898 case V4L2_CID_MPEG_STREAM_VBI_FMT:
899 return v4l2_ctrl_query_fill(qctrl,
900 V4L2_MPEG_STREAM_VBI_FMT_NONE,
901 V4L2_MPEG_STREAM_VBI_FMT_IVTV, 1,
902 V4L2_MPEG_STREAM_VBI_FMT_NONE);
903 default:
904 return -EINVAL;
905 }
906 }
907
908 /* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and
909 the menu. The qctrl pointer may be NULL, in which case it is ignored. */
910 int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl,
911 const char **menu_items)
912 {
913 int i;
914
915 if (menu_items == NULL ||
916 (qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum)))
917 return -EINVAL;
918 for (i = 0; i < qmenu->index && menu_items[i]; i++) ;
919 if (menu_items[i] == NULL || menu_items[i][0] == '\0')
920 return -EINVAL;
921 snprintf(qmenu->name, sizeof(qmenu->name), menu_items[qmenu->index]);
922 qmenu->reserved = 0;
923 return 0;
924 }
925
926 /* ctrl_classes points to an array of u32 pointers, the last element is
927 a NULL pointer. Each u32 array is a 0-terminated array of control IDs.
928 Each array must be sorted low to high and belong to the same control
929 class. The array of u32 pointer must also be sorted, from low class IDs
930 to high class IDs.
931
932 This function returns the first ID that follows after the given ID.
933 When no more controls are available 0 is returned. */
934 u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
935 {
936 u32 ctrl_class = V4L2_CTRL_ID2CLASS(id);
937 const u32 *pctrl;
938
939 if (ctrl_classes == NULL)
940 return 0;
941
942 /* if no query is desired, then check if the ID is part of ctrl_classes */
943 if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) {
944 /* find class */
945 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class)
946 ctrl_classes++;
947 if (*ctrl_classes == NULL)
948 return 0;
949 pctrl = *ctrl_classes;
950 /* find control ID */
951 while (*pctrl && *pctrl != id) pctrl++;
952 return *pctrl ? id : 0;
953 }
954 id &= V4L2_CTRL_ID_MASK;
955 id++; /* select next control */
956 /* find first class that matches (or is greater than) the class of
957 the ID */
958 while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class)
959 ctrl_classes++;
960 /* no more classes */
961 if (*ctrl_classes == NULL)
962 return 0;
963 pctrl = *ctrl_classes;
964 /* find first ctrl within the class that is >= ID */
965 while (*pctrl && *pctrl < id) pctrl++;
966 if (*pctrl)
967 return *pctrl;
968 /* we are at the end of the controls of the current class. */
969 /* continue with next class if available */
970 ctrl_classes++;
971 if (*ctrl_classes == NULL)
972 return 0;
973 return **ctrl_classes;
974 }
975
976 int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 match_type, u32 match_chip)
977 {
978 switch (match_type) {
979 case V4L2_CHIP_MATCH_I2C_DRIVER:
980 return (c != NULL && c->driver != NULL && c->driver->id == match_chip);
981 case V4L2_CHIP_MATCH_I2C_ADDR:
982 return (c != NULL && c->addr == match_chip);
983 default:
984 return 0;
985 }
986 }
987
988 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip,
989 u32 ident, u32 revision)
990 {
991 if (!v4l2_chip_match_i2c_client(c, chip->match_type, chip->match_chip))
992 return 0;
993 if (chip->ident == V4L2_IDENT_NONE) {
994 chip->ident = ident;
995 chip->revision = revision;
996 }
997 else {
998 chip->ident = V4L2_IDENT_AMBIGUOUS;
999 chip->revision = 0;
1000 }
1001 return 0;
1002 }
1003
1004 int v4l2_chip_match_host(u32 match_type, u32 match_chip)
1005 {
1006 switch (match_type) {
1007 case V4L2_CHIP_MATCH_HOST:
1008 return match_chip == 0;
1009 default:
1010 return 0;
1011 }
1012 }
1013
1014 /* ----------------------------------------------------------------- */
1015
1016 /* Helper function for I2C legacy drivers */
1017
1018 int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver,
1019 const char *name, int (*probe)(struct i2c_client *))
1020 {
1021 struct i2c_client *client;
1022 int err;
1023
1024 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
1025 if (client == 0)
1026 return -ENOMEM;
1027
1028 client->addr = address;
1029 client->adapter = adapter;
1030 client->driver = driver;
1031 strlcpy(client->name, name, sizeof(client->name));
1032
1033 err = probe(client);
1034 if (err == 0) {
1035 i2c_attach_client(client);
1036 } else {
1037 kfree(client);
1038 }
1039 return err != -ENOMEM ? 0 : err;
1040 }
1041
1042 /* ----------------------------------------------------------------- */
1043
1044 EXPORT_SYMBOL(v4l2_norm_to_name);
1045 EXPORT_SYMBOL(v4l2_video_std_construct);
1046
1047 EXPORT_SYMBOL(v4l2_prio_init);
1048 EXPORT_SYMBOL(v4l2_prio_change);
1049 EXPORT_SYMBOL(v4l2_prio_open);
1050 EXPORT_SYMBOL(v4l2_prio_close);
1051 EXPORT_SYMBOL(v4l2_prio_max);
1052 EXPORT_SYMBOL(v4l2_prio_check);
1053
1054 EXPORT_SYMBOL(v4l2_field_names);
1055 EXPORT_SYMBOL(v4l2_type_names);
1056 EXPORT_SYMBOL(v4l_printk_ioctl);
1057
1058 EXPORT_SYMBOL(v4l2_ctrl_next);
1059 EXPORT_SYMBOL(v4l2_ctrl_check);
1060 EXPORT_SYMBOL(v4l2_ctrl_get_menu);
1061 EXPORT_SYMBOL(v4l2_ctrl_query_menu);
1062 EXPORT_SYMBOL(v4l2_ctrl_query_fill);
1063 EXPORT_SYMBOL(v4l2_ctrl_query_fill_std);
1064
1065 EXPORT_SYMBOL(v4l2_chip_match_i2c_client);
1066 EXPORT_SYMBOL(v4l2_chip_ident_i2c_client);
1067 EXPORT_SYMBOL(v4l2_chip_match_host);
1068
1069 EXPORT_SYMBOL(v4l2_i2c_attach);
1070
1071 /*
1072 * Local variables:
1073 * c-basic-offset: 8
1074 * End:
1075 */
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