Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Mauro Carvalho Chehab | 43db48d | 2007-01-09 11:20:59 -0300 | [diff] [blame] | 15 | * Author: Bill Dirks <bill@thedirks.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Jan Engelhardt | 96de0e2 | 2007-10-19 23:21:04 +0200 | [diff] [blame] | 40 | * Iñaki García Etxebarria <garetxe@euskalnet.net> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <linux/module.h> |
| 48 | #include <linux/types.h> |
| 49 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/mm.h> |
| 51 | #include <linux/string.h> |
| 52 | #include <linux/errno.h> |
Hans Verkuil | f3d092b | 2007-02-23 20:55:14 -0300 | [diff] [blame] | 53 | #include <linux/i2c.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Mauro Carvalho Chehab | 401998f | 2006-06-04 10:06:18 -0300 | [diff] [blame] | 59 | #define __OLD_VIDIOC_ /* To allow fixing old calls*/ |
Michael Krufky | 5e453dc | 2006-01-09 15:32:31 -0200 | [diff] [blame] | 60 | #include <media/v4l2-common.h> |
Hans Verkuil | 3434eb7 | 2007-04-27 12:31:08 -0300 | [diff] [blame] | 61 | #include <media/v4l2-chip-ident.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | #ifdef CONFIG_KMOD |
| 64 | #include <linux/kmod.h> |
| 65 | #endif |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include <linux/videodev.h> |
| 68 | |
| 69 | MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr"); |
| 70 | MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers"); |
| 71 | MODULE_LICENSE("GPL"); |
| 72 | |
| 73 | /* |
| 74 | * |
| 75 | * V 4 L 2 D R I V E R H E L P E R A P I |
| 76 | * |
| 77 | */ |
| 78 | |
| 79 | /* |
| 80 | * Video Standard Operations (contributed by Michael Schimek) |
| 81 | */ |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | /* ----------------------------------------------------------------- */ |
| 85 | /* priority handling */ |
| 86 | |
| 87 | #define V4L2_PRIO_VALID(val) (val == V4L2_PRIORITY_BACKGROUND || \ |
| 88 | val == V4L2_PRIORITY_INTERACTIVE || \ |
| 89 | val == V4L2_PRIORITY_RECORD) |
| 90 | |
| 91 | int v4l2_prio_init(struct v4l2_prio_state *global) |
| 92 | { |
| 93 | memset(global,0,sizeof(*global)); |
| 94 | return 0; |
| 95 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 96 | EXPORT_SYMBOL(v4l2_prio_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local, |
| 99 | enum v4l2_priority new) |
| 100 | { |
| 101 | if (!V4L2_PRIO_VALID(new)) |
| 102 | return -EINVAL; |
| 103 | if (*local == new) |
| 104 | return 0; |
| 105 | |
| 106 | atomic_inc(&global->prios[new]); |
| 107 | if (V4L2_PRIO_VALID(*local)) |
| 108 | atomic_dec(&global->prios[*local]); |
| 109 | *local = new; |
| 110 | return 0; |
| 111 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 112 | EXPORT_SYMBOL(v4l2_prio_change); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local) |
| 115 | { |
| 116 | return v4l2_prio_change(global,local,V4L2_PRIORITY_DEFAULT); |
| 117 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 118 | EXPORT_SYMBOL(v4l2_prio_open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local) |
| 121 | { |
| 122 | if (V4L2_PRIO_VALID(*local)) |
| 123 | atomic_dec(&global->prios[*local]); |
| 124 | return 0; |
| 125 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 126 | EXPORT_SYMBOL(v4l2_prio_close); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global) |
| 129 | { |
| 130 | if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0) |
| 131 | return V4L2_PRIORITY_RECORD; |
| 132 | if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0) |
| 133 | return V4L2_PRIORITY_INTERACTIVE; |
| 134 | if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0) |
| 135 | return V4L2_PRIORITY_BACKGROUND; |
| 136 | return V4L2_PRIORITY_UNSET; |
| 137 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 138 | EXPORT_SYMBOL(v4l2_prio_max); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
| 140 | int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local) |
| 141 | { |
| 142 | if (*local < v4l2_prio_max(global)) |
| 143 | return -EBUSY; |
| 144 | return 0; |
| 145 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 146 | EXPORT_SYMBOL(v4l2_prio_check); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | /* ----------------------------------------------------------------- */ |
| 149 | |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 150 | /* Helper functions for control handling */ |
| 151 | |
| 152 | /* Check for correctness of the ctrl's value based on the data from |
| 153 | struct v4l2_queryctrl and the available menu items. Note that |
| 154 | menu_items may be NULL, in that case it is ignored. */ |
| 155 | int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl, |
| 156 | const char **menu_items) |
| 157 | { |
| 158 | if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED) |
| 159 | return -EINVAL; |
| 160 | if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED) |
| 161 | return -EBUSY; |
| 162 | if (qctrl->type == V4L2_CTRL_TYPE_BUTTON || |
| 163 | qctrl->type == V4L2_CTRL_TYPE_INTEGER64 || |
| 164 | qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) |
| 165 | return 0; |
| 166 | if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum) |
| 167 | return -ERANGE; |
| 168 | if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) { |
| 169 | if (menu_items[ctrl->value] == NULL || |
| 170 | menu_items[ctrl->value][0] == '\0') |
| 171 | return -EINVAL; |
| 172 | } |
| 173 | return 0; |
| 174 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 175 | EXPORT_SYMBOL(v4l2_ctrl_check); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 176 | |
| 177 | /* Returns NULL or a character pointer array containing the menu for |
| 178 | the given control ID. The pointer array ends with a NULL pointer. |
| 179 | An empty string signifies a menu entry that is invalid. This allows |
| 180 | drivers to disable certain options if it is not supported. */ |
| 181 | const char **v4l2_ctrl_get_menu(u32 id) |
| 182 | { |
| 183 | static const char *mpeg_audio_sampling_freq[] = { |
| 184 | "44.1 kHz", |
| 185 | "48 kHz", |
| 186 | "32 kHz", |
| 187 | NULL |
| 188 | }; |
| 189 | static const char *mpeg_audio_encoding[] = { |
| 190 | "Layer I", |
| 191 | "Layer II", |
| 192 | "Layer III", |
| 193 | NULL |
| 194 | }; |
| 195 | static const char *mpeg_audio_l1_bitrate[] = { |
| 196 | "32 kbps", |
| 197 | "64 kbps", |
| 198 | "96 kbps", |
| 199 | "128 kbps", |
| 200 | "160 kbps", |
| 201 | "192 kbps", |
| 202 | "224 kbps", |
| 203 | "256 kbps", |
| 204 | "288 kbps", |
| 205 | "320 kbps", |
| 206 | "352 kbps", |
| 207 | "384 kbps", |
| 208 | "416 kbps", |
| 209 | "448 kbps", |
| 210 | NULL |
| 211 | }; |
| 212 | static const char *mpeg_audio_l2_bitrate[] = { |
| 213 | "32 kbps", |
| 214 | "48 kbps", |
| 215 | "56 kbps", |
| 216 | "64 kbps", |
| 217 | "80 kbps", |
| 218 | "96 kbps", |
| 219 | "112 kbps", |
| 220 | "128 kbps", |
| 221 | "160 kbps", |
| 222 | "192 kbps", |
| 223 | "224 kbps", |
| 224 | "256 kbps", |
| 225 | "320 kbps", |
| 226 | "384 kbps", |
| 227 | NULL |
| 228 | }; |
| 229 | static const char *mpeg_audio_l3_bitrate[] = { |
| 230 | "32 kbps", |
| 231 | "40 kbps", |
| 232 | "48 kbps", |
| 233 | "56 kbps", |
| 234 | "64 kbps", |
| 235 | "80 kbps", |
| 236 | "96 kbps", |
| 237 | "112 kbps", |
| 238 | "128 kbps", |
| 239 | "160 kbps", |
| 240 | "192 kbps", |
| 241 | "224 kbps", |
| 242 | "256 kbps", |
| 243 | "320 kbps", |
| 244 | NULL |
| 245 | }; |
| 246 | static const char *mpeg_audio_mode[] = { |
| 247 | "Stereo", |
| 248 | "Joint Stereo", |
| 249 | "Dual", |
| 250 | "Mono", |
| 251 | NULL |
| 252 | }; |
| 253 | static const char *mpeg_audio_mode_extension[] = { |
| 254 | "Bound 4", |
| 255 | "Bound 8", |
| 256 | "Bound 12", |
| 257 | "Bound 16", |
| 258 | NULL |
| 259 | }; |
| 260 | static const char *mpeg_audio_emphasis[] = { |
| 261 | "No Emphasis", |
| 262 | "50/15 us", |
| 263 | "CCITT J17", |
| 264 | NULL |
| 265 | }; |
| 266 | static const char *mpeg_audio_crc[] = { |
| 267 | "No CRC", |
| 268 | "16-bit CRC", |
| 269 | NULL |
| 270 | }; |
| 271 | static const char *mpeg_video_encoding[] = { |
| 272 | "MPEG-1", |
| 273 | "MPEG-2", |
| 274 | NULL |
| 275 | }; |
| 276 | static const char *mpeg_video_aspect[] = { |
| 277 | "1x1", |
| 278 | "4x3", |
| 279 | "16x9", |
| 280 | "2.21x1", |
| 281 | NULL |
| 282 | }; |
| 283 | static const char *mpeg_video_bitrate_mode[] = { |
| 284 | "Variable Bitrate", |
| 285 | "Constant Bitrate", |
| 286 | NULL |
| 287 | }; |
| 288 | static const char *mpeg_stream_type[] = { |
| 289 | "MPEG-2 Program Stream", |
| 290 | "MPEG-2 Transport Stream", |
| 291 | "MPEG-1 System Stream", |
| 292 | "MPEG-2 DVD-compatible Stream", |
| 293 | "MPEG-1 VCD-compatible Stream", |
| 294 | "MPEG-2 SVCD-compatible Stream", |
| 295 | NULL |
| 296 | }; |
Hans Verkuil | 8cbde94 | 2006-06-24 14:36:02 -0300 | [diff] [blame] | 297 | static const char *mpeg_stream_vbi_fmt[] = { |
| 298 | "No VBI", |
Hans Verkuil | 9952351 | 2006-06-25 11:18:54 -0300 | [diff] [blame] | 299 | "Private packet, IVTV format", |
Hans Verkuil | 8cbde94 | 2006-06-24 14:36:02 -0300 | [diff] [blame] | 300 | NULL |
| 301 | }; |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 302 | |
| 303 | switch (id) { |
| 304 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: |
| 305 | return mpeg_audio_sampling_freq; |
| 306 | case V4L2_CID_MPEG_AUDIO_ENCODING: |
| 307 | return mpeg_audio_encoding; |
| 308 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: |
| 309 | return mpeg_audio_l1_bitrate; |
| 310 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: |
| 311 | return mpeg_audio_l2_bitrate; |
| 312 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: |
| 313 | return mpeg_audio_l3_bitrate; |
| 314 | case V4L2_CID_MPEG_AUDIO_MODE: |
| 315 | return mpeg_audio_mode; |
| 316 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: |
| 317 | return mpeg_audio_mode_extension; |
| 318 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: |
| 319 | return mpeg_audio_emphasis; |
| 320 | case V4L2_CID_MPEG_AUDIO_CRC: |
| 321 | return mpeg_audio_crc; |
| 322 | case V4L2_CID_MPEG_VIDEO_ENCODING: |
| 323 | return mpeg_video_encoding; |
| 324 | case V4L2_CID_MPEG_VIDEO_ASPECT: |
| 325 | return mpeg_video_aspect; |
| 326 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: |
| 327 | return mpeg_video_bitrate_mode; |
| 328 | case V4L2_CID_MPEG_STREAM_TYPE: |
| 329 | return mpeg_stream_type; |
Hans Verkuil | 8cbde94 | 2006-06-24 14:36:02 -0300 | [diff] [blame] | 330 | case V4L2_CID_MPEG_STREAM_VBI_FMT: |
| 331 | return mpeg_stream_vbi_fmt; |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 332 | default: |
| 333 | return NULL; |
| 334 | } |
| 335 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 336 | EXPORT_SYMBOL(v4l2_ctrl_get_menu); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 337 | |
| 338 | /* Fill in a struct v4l2_queryctrl */ |
| 339 | int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def) |
| 340 | { |
| 341 | const char *name; |
| 342 | |
| 343 | qctrl->flags = 0; |
| 344 | switch (qctrl->id) { |
| 345 | /* USER controls */ |
| 346 | case V4L2_CID_USER_CLASS: name = "User Controls"; break; |
| 347 | case V4L2_CID_AUDIO_VOLUME: name = "Volume"; break; |
| 348 | case V4L2_CID_AUDIO_MUTE: name = "Mute"; break; |
| 349 | case V4L2_CID_AUDIO_BALANCE: name = "Balance"; break; |
| 350 | case V4L2_CID_AUDIO_BASS: name = "Bass"; break; |
| 351 | case V4L2_CID_AUDIO_TREBLE: name = "Treble"; break; |
| 352 | case V4L2_CID_AUDIO_LOUDNESS: name = "Loudness"; break; |
| 353 | case V4L2_CID_BRIGHTNESS: name = "Brightness"; break; |
| 354 | case V4L2_CID_CONTRAST: name = "Contrast"; break; |
| 355 | case V4L2_CID_SATURATION: name = "Saturation"; break; |
| 356 | case V4L2_CID_HUE: name = "Hue"; break; |
| 357 | |
| 358 | /* MPEG controls */ |
| 359 | case V4L2_CID_MPEG_CLASS: name = "MPEG Encoder Controls"; break; |
| 360 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: name = "Audio Sampling Frequency"; break; |
| 361 | case V4L2_CID_MPEG_AUDIO_ENCODING: name = "Audio Encoding Layer"; break; |
| 362 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: name = "Audio Layer I Bitrate"; break; |
| 363 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: name = "Audio Layer II Bitrate"; break; |
| 364 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: name = "Audio Layer III Bitrate"; break; |
| 365 | case V4L2_CID_MPEG_AUDIO_MODE: name = "Audio Stereo Mode"; break; |
| 366 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: name = "Audio Stereo Mode Extension"; break; |
| 367 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: name = "Audio Emphasis"; break; |
| 368 | case V4L2_CID_MPEG_AUDIO_CRC: name = "Audio CRC"; break; |
Hans Verkuil | 5eee72e | 2007-04-27 12:31:00 -0300 | [diff] [blame] | 369 | case V4L2_CID_MPEG_AUDIO_MUTE: name = "Audio Mute"; break; |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 370 | case V4L2_CID_MPEG_VIDEO_ENCODING: name = "Video Encoding"; break; |
| 371 | case V4L2_CID_MPEG_VIDEO_ASPECT: name = "Video Aspect"; break; |
| 372 | case V4L2_CID_MPEG_VIDEO_B_FRAMES: name = "Video B Frames"; break; |
| 373 | case V4L2_CID_MPEG_VIDEO_GOP_SIZE: name = "Video GOP Size"; break; |
| 374 | case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: name = "Video GOP Closure"; break; |
| 375 | case V4L2_CID_MPEG_VIDEO_PULLDOWN: name = "Video Pulldown"; break; |
| 376 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: name = "Video Bitrate Mode"; break; |
| 377 | case V4L2_CID_MPEG_VIDEO_BITRATE: name = "Video Bitrate"; break; |
| 378 | case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: name = "Video Peak Bitrate"; break; |
| 379 | case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: name = "Video Temporal Decimation"; break; |
Hans Verkuil | 5eee72e | 2007-04-27 12:31:00 -0300 | [diff] [blame] | 380 | case V4L2_CID_MPEG_VIDEO_MUTE: name = "Video Mute"; break; |
| 381 | case V4L2_CID_MPEG_VIDEO_MUTE_YUV: name = "Video Mute YUV"; break; |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 382 | case V4L2_CID_MPEG_STREAM_TYPE: name = "Stream Type"; break; |
| 383 | case V4L2_CID_MPEG_STREAM_PID_PMT: name = "Stream PMT Program ID"; break; |
| 384 | case V4L2_CID_MPEG_STREAM_PID_AUDIO: name = "Stream Audio Program ID"; break; |
| 385 | case V4L2_CID_MPEG_STREAM_PID_VIDEO: name = "Stream Video Program ID"; break; |
| 386 | case V4L2_CID_MPEG_STREAM_PID_PCR: name = "Stream PCR Program ID"; break; |
| 387 | case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: name = "Stream PES Audio ID"; break; |
| 388 | case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: name = "Stream PES Video ID"; break; |
Hans Verkuil | 8cbde94 | 2006-06-24 14:36:02 -0300 | [diff] [blame] | 389 | case V4L2_CID_MPEG_STREAM_VBI_FMT: name = "Stream VBI Format"; break; |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 390 | |
| 391 | default: |
| 392 | return -EINVAL; |
| 393 | } |
| 394 | switch (qctrl->id) { |
| 395 | case V4L2_CID_AUDIO_MUTE: |
| 396 | case V4L2_CID_AUDIO_LOUDNESS: |
Hans Verkuil | 5eee72e | 2007-04-27 12:31:00 -0300 | [diff] [blame] | 397 | case V4L2_CID_MPEG_AUDIO_MUTE: |
Hans Verkuil | 01f1e44 | 2007-08-21 18:32:42 -0300 | [diff] [blame] | 398 | case V4L2_CID_MPEG_VIDEO_MUTE: |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 399 | case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: |
| 400 | case V4L2_CID_MPEG_VIDEO_PULLDOWN: |
| 401 | qctrl->type = V4L2_CTRL_TYPE_BOOLEAN; |
| 402 | min = 0; |
| 403 | max = step = 1; |
| 404 | break; |
| 405 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: |
| 406 | case V4L2_CID_MPEG_AUDIO_ENCODING: |
| 407 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: |
| 408 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: |
| 409 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: |
| 410 | case V4L2_CID_MPEG_AUDIO_MODE: |
| 411 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: |
| 412 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: |
| 413 | case V4L2_CID_MPEG_AUDIO_CRC: |
| 414 | case V4L2_CID_MPEG_VIDEO_ENCODING: |
| 415 | case V4L2_CID_MPEG_VIDEO_ASPECT: |
| 416 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: |
| 417 | case V4L2_CID_MPEG_STREAM_TYPE: |
Hans Verkuil | 8cbde94 | 2006-06-24 14:36:02 -0300 | [diff] [blame] | 418 | case V4L2_CID_MPEG_STREAM_VBI_FMT: |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 419 | qctrl->type = V4L2_CTRL_TYPE_MENU; |
| 420 | step = 1; |
| 421 | break; |
| 422 | case V4L2_CID_USER_CLASS: |
| 423 | case V4L2_CID_MPEG_CLASS: |
| 424 | qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS; |
| 425 | qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; |
| 426 | min = max = step = def = 0; |
| 427 | break; |
| 428 | default: |
| 429 | qctrl->type = V4L2_CTRL_TYPE_INTEGER; |
| 430 | break; |
| 431 | } |
| 432 | switch (qctrl->id) { |
| 433 | case V4L2_CID_MPEG_AUDIO_ENCODING: |
| 434 | case V4L2_CID_MPEG_AUDIO_MODE: |
| 435 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: |
| 436 | case V4L2_CID_MPEG_VIDEO_B_FRAMES: |
| 437 | case V4L2_CID_MPEG_STREAM_TYPE: |
| 438 | qctrl->flags |= V4L2_CTRL_FLAG_UPDATE; |
| 439 | break; |
| 440 | case V4L2_CID_AUDIO_VOLUME: |
| 441 | case V4L2_CID_AUDIO_BALANCE: |
| 442 | case V4L2_CID_AUDIO_BASS: |
| 443 | case V4L2_CID_AUDIO_TREBLE: |
| 444 | case V4L2_CID_BRIGHTNESS: |
| 445 | case V4L2_CID_CONTRAST: |
| 446 | case V4L2_CID_SATURATION: |
| 447 | case V4L2_CID_HUE: |
| 448 | qctrl->flags |= V4L2_CTRL_FLAG_SLIDER; |
| 449 | break; |
| 450 | } |
| 451 | qctrl->minimum = min; |
| 452 | qctrl->maximum = max; |
| 453 | qctrl->step = step; |
| 454 | qctrl->default_value = def; |
| 455 | qctrl->reserved[0] = qctrl->reserved[1] = 0; |
| 456 | snprintf(qctrl->name, sizeof(qctrl->name), name); |
| 457 | return 0; |
| 458 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 459 | EXPORT_SYMBOL(v4l2_ctrl_query_fill); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 460 | |
| 461 | /* Fill in a struct v4l2_queryctrl with standard values based on |
| 462 | the control ID. */ |
| 463 | int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl) |
| 464 | { |
| 465 | switch (qctrl->id) { |
| 466 | /* USER controls */ |
| 467 | case V4L2_CID_USER_CLASS: |
| 468 | case V4L2_CID_MPEG_CLASS: |
| 469 | return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0); |
| 470 | case V4L2_CID_AUDIO_VOLUME: |
| 471 | return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 58880); |
| 472 | case V4L2_CID_AUDIO_MUTE: |
| 473 | case V4L2_CID_AUDIO_LOUDNESS: |
| 474 | return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); |
| 475 | case V4L2_CID_AUDIO_BALANCE: |
| 476 | case V4L2_CID_AUDIO_BASS: |
| 477 | case V4L2_CID_AUDIO_TREBLE: |
| 478 | return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 32768); |
| 479 | case V4L2_CID_BRIGHTNESS: |
| 480 | return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 128); |
| 481 | case V4L2_CID_CONTRAST: |
| 482 | case V4L2_CID_SATURATION: |
| 483 | return v4l2_ctrl_query_fill(qctrl, 0, 127, 1, 64); |
| 484 | case V4L2_CID_HUE: |
| 485 | return v4l2_ctrl_query_fill(qctrl, -128, 127, 1, 0); |
| 486 | |
| 487 | /* MPEG controls */ |
| 488 | case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: |
| 489 | return v4l2_ctrl_query_fill(qctrl, |
| 490 | V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100, |
| 491 | V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000, 1, |
| 492 | V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000); |
| 493 | case V4L2_CID_MPEG_AUDIO_ENCODING: |
| 494 | return v4l2_ctrl_query_fill(qctrl, |
| 495 | V4L2_MPEG_AUDIO_ENCODING_LAYER_1, |
| 496 | V4L2_MPEG_AUDIO_ENCODING_LAYER_3, 1, |
| 497 | V4L2_MPEG_AUDIO_ENCODING_LAYER_2); |
| 498 | case V4L2_CID_MPEG_AUDIO_L1_BITRATE: |
| 499 | return v4l2_ctrl_query_fill(qctrl, |
| 500 | V4L2_MPEG_AUDIO_L1_BITRATE_32K, |
| 501 | V4L2_MPEG_AUDIO_L1_BITRATE_448K, 1, |
| 502 | V4L2_MPEG_AUDIO_L1_BITRATE_256K); |
| 503 | case V4L2_CID_MPEG_AUDIO_L2_BITRATE: |
| 504 | return v4l2_ctrl_query_fill(qctrl, |
| 505 | V4L2_MPEG_AUDIO_L2_BITRATE_32K, |
| 506 | V4L2_MPEG_AUDIO_L2_BITRATE_384K, 1, |
| 507 | V4L2_MPEG_AUDIO_L2_BITRATE_224K); |
| 508 | case V4L2_CID_MPEG_AUDIO_L3_BITRATE: |
| 509 | return v4l2_ctrl_query_fill(qctrl, |
| 510 | V4L2_MPEG_AUDIO_L3_BITRATE_32K, |
| 511 | V4L2_MPEG_AUDIO_L3_BITRATE_320K, 1, |
| 512 | V4L2_MPEG_AUDIO_L3_BITRATE_192K); |
| 513 | case V4L2_CID_MPEG_AUDIO_MODE: |
| 514 | return v4l2_ctrl_query_fill(qctrl, |
| 515 | V4L2_MPEG_AUDIO_MODE_STEREO, |
| 516 | V4L2_MPEG_AUDIO_MODE_MONO, 1, |
| 517 | V4L2_MPEG_AUDIO_MODE_STEREO); |
| 518 | case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: |
| 519 | return v4l2_ctrl_query_fill(qctrl, |
| 520 | V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4, |
| 521 | V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16, 1, |
| 522 | V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4); |
| 523 | case V4L2_CID_MPEG_AUDIO_EMPHASIS: |
| 524 | return v4l2_ctrl_query_fill(qctrl, |
| 525 | V4L2_MPEG_AUDIO_EMPHASIS_NONE, |
| 526 | V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17, 1, |
| 527 | V4L2_MPEG_AUDIO_EMPHASIS_NONE); |
| 528 | case V4L2_CID_MPEG_AUDIO_CRC: |
| 529 | return v4l2_ctrl_query_fill(qctrl, |
| 530 | V4L2_MPEG_AUDIO_CRC_NONE, |
| 531 | V4L2_MPEG_AUDIO_CRC_CRC16, 1, |
| 532 | V4L2_MPEG_AUDIO_CRC_NONE); |
Hans Verkuil | 5eee72e | 2007-04-27 12:31:00 -0300 | [diff] [blame] | 533 | case V4L2_CID_MPEG_AUDIO_MUTE: |
| 534 | return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 535 | case V4L2_CID_MPEG_VIDEO_ENCODING: |
| 536 | return v4l2_ctrl_query_fill(qctrl, |
| 537 | V4L2_MPEG_VIDEO_ENCODING_MPEG_1, |
| 538 | V4L2_MPEG_VIDEO_ENCODING_MPEG_2, 1, |
| 539 | V4L2_MPEG_VIDEO_ENCODING_MPEG_2); |
| 540 | case V4L2_CID_MPEG_VIDEO_ASPECT: |
| 541 | return v4l2_ctrl_query_fill(qctrl, |
| 542 | V4L2_MPEG_VIDEO_ASPECT_1x1, |
| 543 | V4L2_MPEG_VIDEO_ASPECT_221x100, 1, |
| 544 | V4L2_MPEG_VIDEO_ASPECT_4x3); |
| 545 | case V4L2_CID_MPEG_VIDEO_B_FRAMES: |
| 546 | return v4l2_ctrl_query_fill(qctrl, 0, 33, 1, 2); |
| 547 | case V4L2_CID_MPEG_VIDEO_GOP_SIZE: |
| 548 | return v4l2_ctrl_query_fill(qctrl, 1, 34, 1, 12); |
| 549 | case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: |
| 550 | return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 1); |
| 551 | case V4L2_CID_MPEG_VIDEO_PULLDOWN: |
| 552 | return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); |
| 553 | case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: |
| 554 | return v4l2_ctrl_query_fill(qctrl, |
| 555 | V4L2_MPEG_VIDEO_BITRATE_MODE_VBR, |
| 556 | V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 1, |
| 557 | V4L2_MPEG_VIDEO_BITRATE_MODE_VBR); |
| 558 | case V4L2_CID_MPEG_VIDEO_BITRATE: |
| 559 | return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 6000000); |
| 560 | case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: |
| 561 | return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 8000000); |
| 562 | case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: |
| 563 | return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0); |
Hans Verkuil | 5eee72e | 2007-04-27 12:31:00 -0300 | [diff] [blame] | 564 | case V4L2_CID_MPEG_VIDEO_MUTE: |
| 565 | return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); |
| 566 | case V4L2_CID_MPEG_VIDEO_MUTE_YUV: /* Init YUV (really YCbCr) to black */ |
| 567 | return v4l2_ctrl_query_fill(qctrl, 0, 0xffffff, 1, 0x008080); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 568 | case V4L2_CID_MPEG_STREAM_TYPE: |
| 569 | return v4l2_ctrl_query_fill(qctrl, |
| 570 | V4L2_MPEG_STREAM_TYPE_MPEG2_PS, |
| 571 | V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD, 1, |
| 572 | V4L2_MPEG_STREAM_TYPE_MPEG2_PS); |
| 573 | case V4L2_CID_MPEG_STREAM_PID_PMT: |
| 574 | return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 16); |
| 575 | case V4L2_CID_MPEG_STREAM_PID_AUDIO: |
| 576 | return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 260); |
| 577 | case V4L2_CID_MPEG_STREAM_PID_VIDEO: |
| 578 | return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 256); |
| 579 | case V4L2_CID_MPEG_STREAM_PID_PCR: |
| 580 | return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 259); |
| 581 | case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: |
| 582 | return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0); |
| 583 | case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: |
| 584 | return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0); |
Hans Verkuil | 8cbde94 | 2006-06-24 14:36:02 -0300 | [diff] [blame] | 585 | case V4L2_CID_MPEG_STREAM_VBI_FMT: |
| 586 | return v4l2_ctrl_query_fill(qctrl, |
| 587 | V4L2_MPEG_STREAM_VBI_FMT_NONE, |
| 588 | V4L2_MPEG_STREAM_VBI_FMT_IVTV, 1, |
| 589 | V4L2_MPEG_STREAM_VBI_FMT_NONE); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 590 | default: |
| 591 | return -EINVAL; |
| 592 | } |
| 593 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 594 | EXPORT_SYMBOL(v4l2_ctrl_query_fill_std); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 595 | |
| 596 | /* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and |
| 597 | the menu. The qctrl pointer may be NULL, in which case it is ignored. */ |
| 598 | int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl, |
| 599 | const char **menu_items) |
| 600 | { |
| 601 | int i; |
| 602 | |
| 603 | if (menu_items == NULL || |
| 604 | (qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum))) |
| 605 | return -EINVAL; |
| 606 | for (i = 0; i < qmenu->index && menu_items[i]; i++) ; |
| 607 | if (menu_items[i] == NULL || menu_items[i][0] == '\0') |
| 608 | return -EINVAL; |
| 609 | snprintf(qmenu->name, sizeof(qmenu->name), menu_items[qmenu->index]); |
| 610 | qmenu->reserved = 0; |
| 611 | return 0; |
| 612 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 613 | EXPORT_SYMBOL(v4l2_ctrl_query_menu); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 614 | |
| 615 | /* ctrl_classes points to an array of u32 pointers, the last element is |
| 616 | a NULL pointer. Each u32 array is a 0-terminated array of control IDs. |
| 617 | Each array must be sorted low to high and belong to the same control |
| 618 | class. The array of u32 pointer must also be sorted, from low class IDs |
| 619 | to high class IDs. |
| 620 | |
| 621 | This function returns the first ID that follows after the given ID. |
| 622 | When no more controls are available 0 is returned. */ |
| 623 | u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id) |
| 624 | { |
Hans Verkuil | a46c5fb | 2007-07-19 04:53:36 -0300 | [diff] [blame] | 625 | u32 ctrl_class = V4L2_CTRL_ID2CLASS(id); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 626 | const u32 *pctrl; |
| 627 | |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 628 | if (ctrl_classes == NULL) |
| 629 | return 0; |
Hans Verkuil | a46c5fb | 2007-07-19 04:53:36 -0300 | [diff] [blame] | 630 | |
| 631 | /* if no query is desired, then check if the ID is part of ctrl_classes */ |
| 632 | if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) { |
| 633 | /* find class */ |
| 634 | while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class) |
| 635 | ctrl_classes++; |
| 636 | if (*ctrl_classes == NULL) |
| 637 | return 0; |
| 638 | pctrl = *ctrl_classes; |
| 639 | /* find control ID */ |
| 640 | while (*pctrl && *pctrl != id) pctrl++; |
| 641 | return *pctrl ? id : 0; |
| 642 | } |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 643 | id &= V4L2_CTRL_ID_MASK; |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 644 | id++; /* select next control */ |
| 645 | /* find first class that matches (or is greater than) the class of |
| 646 | the ID */ |
| 647 | while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class) |
| 648 | ctrl_classes++; |
| 649 | /* no more classes */ |
| 650 | if (*ctrl_classes == NULL) |
| 651 | return 0; |
| 652 | pctrl = *ctrl_classes; |
| 653 | /* find first ctrl within the class that is >= ID */ |
| 654 | while (*pctrl && *pctrl < id) pctrl++; |
| 655 | if (*pctrl) |
| 656 | return *pctrl; |
| 657 | /* we are at the end of the controls of the current class. */ |
| 658 | /* continue with next class if available */ |
| 659 | ctrl_classes++; |
| 660 | if (*ctrl_classes == NULL) |
| 661 | return 0; |
| 662 | return **ctrl_classes; |
| 663 | } |
Mauro Carvalho Chehab | 057596e | 2008-02-02 11:25:31 -0300 | [diff] [blame] | 664 | EXPORT_SYMBOL(v4l2_ctrl_next); |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 665 | |
Mauro Carvalho Chehab | a925447 | 2008-01-29 18:32:35 -0300 | [diff] [blame] | 666 | int v4l2_chip_match_host(u32 match_type, u32 match_chip) |
| 667 | { |
| 668 | switch (match_type) { |
| 669 | case V4L2_CHIP_MATCH_HOST: |
| 670 | return match_chip == 0; |
| 671 | default: |
| 672 | return 0; |
| 673 | } |
| 674 | } |
| 675 | EXPORT_SYMBOL(v4l2_chip_match_host); |
| 676 | |
| 677 | #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
Hans Verkuil | f3d092b | 2007-02-23 20:55:14 -0300 | [diff] [blame] | 678 | int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 match_type, u32 match_chip) |
| 679 | { |
| 680 | switch (match_type) { |
Hans Verkuil | f3d092b | 2007-02-23 20:55:14 -0300 | [diff] [blame] | 681 | case V4L2_CHIP_MATCH_I2C_DRIVER: |
| 682 | return (c != NULL && c->driver != NULL && c->driver->id == match_chip); |
| 683 | case V4L2_CHIP_MATCH_I2C_ADDR: |
| 684 | return (c != NULL && c->addr == match_chip); |
| 685 | default: |
| 686 | return 0; |
| 687 | } |
| 688 | } |
Mauro Carvalho Chehab | a925447 | 2008-01-29 18:32:35 -0300 | [diff] [blame] | 689 | EXPORT_SYMBOL(v4l2_chip_match_i2c_client); |
Hans Verkuil | f3d092b | 2007-02-23 20:55:14 -0300 | [diff] [blame] | 690 | |
Hans Verkuil | 3434eb7 | 2007-04-27 12:31:08 -0300 | [diff] [blame] | 691 | int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip, |
| 692 | u32 ident, u32 revision) |
| 693 | { |
| 694 | if (!v4l2_chip_match_i2c_client(c, chip->match_type, chip->match_chip)) |
| 695 | return 0; |
| 696 | if (chip->ident == V4L2_IDENT_NONE) { |
| 697 | chip->ident = ident; |
| 698 | chip->revision = revision; |
| 699 | } |
| 700 | else { |
| 701 | chip->ident = V4L2_IDENT_AMBIGUOUS; |
| 702 | chip->revision = 0; |
| 703 | } |
| 704 | return 0; |
| 705 | } |
Mauro Carvalho Chehab | a925447 | 2008-01-29 18:32:35 -0300 | [diff] [blame] | 706 | EXPORT_SYMBOL(v4l2_chip_ident_i2c_client); |
Hans Verkuil | f3d092b | 2007-02-23 20:55:14 -0300 | [diff] [blame] | 707 | |
Hans Verkuil | 9cb2318 | 2006-06-18 14:11:08 -0300 | [diff] [blame] | 708 | /* ----------------------------------------------------------------- */ |
| 709 | |
Hans Verkuil | 8ffbc65 | 2007-09-12 08:32:50 -0300 | [diff] [blame] | 710 | /* Helper function for I2C legacy drivers */ |
| 711 | |
| 712 | int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver, |
| 713 | const char *name, int (*probe)(struct i2c_client *)) |
| 714 | { |
| 715 | struct i2c_client *client; |
| 716 | int err; |
| 717 | |
| 718 | client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); |
Harvey Harrison | a6a3a17 | 2008-04-28 16:50:03 -0700 | [diff] [blame^] | 719 | if (!client) |
Hans Verkuil | 8ffbc65 | 2007-09-12 08:32:50 -0300 | [diff] [blame] | 720 | return -ENOMEM; |
| 721 | |
| 722 | client->addr = address; |
| 723 | client->adapter = adapter; |
| 724 | client->driver = driver; |
Hans Verkuil | 393bf55 | 2007-09-18 03:22:32 -0300 | [diff] [blame] | 725 | strlcpy(client->name, name, sizeof(client->name)); |
Hans Verkuil | 8ffbc65 | 2007-09-12 08:32:50 -0300 | [diff] [blame] | 726 | |
| 727 | err = probe(client); |
| 728 | if (err == 0) { |
| 729 | i2c_attach_client(client); |
Hans Verkuil | 393bf55 | 2007-09-18 03:22:32 -0300 | [diff] [blame] | 730 | } else { |
Hans Verkuil | 8ffbc65 | 2007-09-12 08:32:50 -0300 | [diff] [blame] | 731 | kfree(client); |
| 732 | } |
Hans Verkuil | 188f345 | 2007-09-16 10:47:15 -0300 | [diff] [blame] | 733 | return err != -ENOMEM ? 0 : err; |
Hans Verkuil | 8ffbc65 | 2007-09-12 08:32:50 -0300 | [diff] [blame] | 734 | } |
Mauro Carvalho Chehab | a925447 | 2008-01-29 18:32:35 -0300 | [diff] [blame] | 735 | EXPORT_SYMBOL(v4l2_i2c_attach); |
| 736 | #endif |