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path: root/drivers/media/video/v4l2-ctrls.c
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Diffstat (limited to 'drivers/media/video/v4l2-ctrls.c')
-rw-r--r--drivers/media/video/v4l2-ctrls.c1873
1 files changed, 0 insertions, 1873 deletions
diff --git a/drivers/media/video/v4l2-ctrls.c b/drivers/media/video/v4l2-ctrls.c
deleted file mode 100644
index ef66d2af0c5..00000000000
--- a/drivers/media/video/v4l2-ctrls.c
+++ /dev/null
@@ -1,1873 +0,0 @@
-/*
- V4L2 controls framework implementation.
-
- Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/ctype.h>
-#include <linux/slab.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-dev.h>
-
-/* Internal temporary helper struct, one for each v4l2_ext_control */
-struct ctrl_helper {
- /* The control corresponding to the v4l2_ext_control ID field. */
- struct v4l2_ctrl *ctrl;
- /* Used internally to mark whether this control was already
- processed. */
- bool handled;
-};
-
-/* Returns NULL or a character pointer array containing the menu for
- the given control ID. The pointer array ends with a NULL pointer.
- An empty string signifies a menu entry that is invalid. This allows
- drivers to disable certain options if it is not supported. */
-const char * const *v4l2_ctrl_get_menu(u32 id)
-{
- static const char * const mpeg_audio_sampling_freq[] = {
- "44.1 kHz",
- "48 kHz",
- "32 kHz",
- NULL
- };
- static const char * const mpeg_audio_encoding[] = {
- "MPEG-1/2 Layer I",
- "MPEG-1/2 Layer II",
- "MPEG-1/2 Layer III",
- "MPEG-2/4 AAC",
- "AC-3",
- NULL
- };
- static const char * const mpeg_audio_l1_bitrate[] = {
- "32 kbps",
- "64 kbps",
- "96 kbps",
- "128 kbps",
- "160 kbps",
- "192 kbps",
- "224 kbps",
- "256 kbps",
- "288 kbps",
- "320 kbps",
- "352 kbps",
- "384 kbps",
- "416 kbps",
- "448 kbps",
- NULL
- };
- static const char * const mpeg_audio_l2_bitrate[] = {
- "32 kbps",
- "48 kbps",
- "56 kbps",
- "64 kbps",
- "80 kbps",
- "96 kbps",
- "112 kbps",
- "128 kbps",
- "160 kbps",
- "192 kbps",
- "224 kbps",
- "256 kbps",
- "320 kbps",
- "384 kbps",
- NULL
- };
- static const char * const mpeg_audio_l3_bitrate[] = {
- "32 kbps",
- "40 kbps",
- "48 kbps",
- "56 kbps",
- "64 kbps",
- "80 kbps",
- "96 kbps",
- "112 kbps",
- "128 kbps",
- "160 kbps",
- "192 kbps",
- "224 kbps",
- "256 kbps",
- "320 kbps",
- NULL
- };
- static const char * const mpeg_audio_ac3_bitrate[] = {
- "32 kbps",
- "40 kbps",
- "48 kbps",
- "56 kbps",
- "64 kbps",
- "80 kbps",
- "96 kbps",
- "112 kbps",
- "128 kbps",
- "160 kbps",
- "192 kbps",
- "224 kbps",
- "256 kbps",
- "320 kbps",
- "384 kbps",
- "448 kbps",
- "512 kbps",
- "576 kbps",
- "640 kbps",
- NULL
- };
- static const char * const mpeg_audio_mode[] = {
- "Stereo",
- "Joint Stereo",
- "Dual",
- "Mono",
- NULL
- };
- static const char * const mpeg_audio_mode_extension[] = {
- "Bound 4",
- "Bound 8",
- "Bound 12",
- "Bound 16",
- NULL
- };
- static const char * const mpeg_audio_emphasis[] = {
- "No Emphasis",
- "50/15 us",
- "CCITT J17",
- NULL
- };
- static const char * const mpeg_audio_crc[] = {
- "No CRC",
- "16-bit CRC",
- NULL
- };
- static const char * const mpeg_video_encoding[] = {
- "MPEG-1",
- "MPEG-2",
- "MPEG-4 AVC",
- NULL
- };
- static const char * const mpeg_video_aspect[] = {
- "1x1",
- "4x3",
- "16x9",
- "2.21x1",
- NULL
- };
- static const char * const mpeg_video_bitrate_mode[] = {
- "Variable Bitrate",
- "Constant Bitrate",
- NULL
- };
- static const char * const mpeg_stream_type[] = {
- "MPEG-2 Program Stream",
- "MPEG-2 Transport Stream",
- "MPEG-1 System Stream",
- "MPEG-2 DVD-compatible Stream",
- "MPEG-1 VCD-compatible Stream",
- "MPEG-2 SVCD-compatible Stream",
- NULL
- };
- static const char * const mpeg_stream_vbi_fmt[] = {
- "No VBI",
- "Private packet, IVTV format",
- NULL
- };
- static const char * const camera_power_line_frequency[] = {
- "Disabled",
- "50 Hz",
- "60 Hz",
- NULL
- };
- static const char * const camera_exposure_auto[] = {
- "Auto Mode",
- "Manual Mode",
- "Shutter Priority Mode",
- "Aperture Priority Mode",
- NULL
- };
- static const char * const colorfx[] = {
- "None",
- "Black & White",
- "Sepia",
- "Negative",
- "Emboss",
- "Sketch",
- "Sky blue",
- "Grass green",
- "Skin whiten",
- "Vivid",
- NULL
- };
- static const char * const tune_preemphasis[] = {
- "No preemphasis",
- "50 useconds",
- "75 useconds",
- NULL,
- };
-
- switch (id) {
- case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
- return mpeg_audio_sampling_freq;
- case V4L2_CID_MPEG_AUDIO_ENCODING:
- return mpeg_audio_encoding;
- case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
- return mpeg_audio_l1_bitrate;
- case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
- return mpeg_audio_l2_bitrate;
- case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
- return mpeg_audio_l3_bitrate;
- case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
- return mpeg_audio_ac3_bitrate;
- case V4L2_CID_MPEG_AUDIO_MODE:
- return mpeg_audio_mode;
- case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
- return mpeg_audio_mode_extension;
- case V4L2_CID_MPEG_AUDIO_EMPHASIS:
- return mpeg_audio_emphasis;
- case V4L2_CID_MPEG_AUDIO_CRC:
- return mpeg_audio_crc;
- case V4L2_CID_MPEG_VIDEO_ENCODING:
- return mpeg_video_encoding;
- case V4L2_CID_MPEG_VIDEO_ASPECT:
- return mpeg_video_aspect;
- case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
- return mpeg_video_bitrate_mode;
- case V4L2_CID_MPEG_STREAM_TYPE:
- return mpeg_stream_type;
- case V4L2_CID_MPEG_STREAM_VBI_FMT:
- return mpeg_stream_vbi_fmt;
- case V4L2_CID_POWER_LINE_FREQUENCY:
- return camera_power_line_frequency;
- case V4L2_CID_EXPOSURE_AUTO:
- return camera_exposure_auto;
- case V4L2_CID_COLORFX:
- return colorfx;
- case V4L2_CID_TUNE_PREEMPHASIS:
- return tune_preemphasis;
- default:
- return NULL;
- }
-}
-EXPORT_SYMBOL(v4l2_ctrl_get_menu);
-
-/* Return the control name. */
-const char *v4l2_ctrl_get_name(u32 id)
-{
- switch (id) {
- /* USER controls */
- /* Keep the order of the 'case's the same as in videodev2.h! */
- case V4L2_CID_USER_CLASS: return "User Controls";
- case V4L2_CID_BRIGHTNESS: return "Brightness";
- case V4L2_CID_CONTRAST: return "Contrast";
- case V4L2_CID_SATURATION: return "Saturation";
- case V4L2_CID_HUE: return "Hue";
- case V4L2_CID_AUDIO_VOLUME: return "Volume";
- case V4L2_CID_AUDIO_BALANCE: return "Balance";
- case V4L2_CID_AUDIO_BASS: return "Bass";
- case V4L2_CID_AUDIO_TREBLE: return "Treble";
- case V4L2_CID_AUDIO_MUTE: return "Mute";
- case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
- case V4L2_CID_BLACK_LEVEL: return "Black Level";
- case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
- case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
- case V4L2_CID_RED_BALANCE: return "Red Balance";
- case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
- case V4L2_CID_GAMMA: return "Gamma";
- case V4L2_CID_EXPOSURE: return "Exposure";
- case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
- case V4L2_CID_GAIN: return "Gain";
- case V4L2_CID_HFLIP: return "Horizontal Flip";
- case V4L2_CID_VFLIP: return "Vertical Flip";
- case V4L2_CID_HCENTER: return "Horizontal Center";
- case V4L2_CID_VCENTER: return "Vertical Center";
- case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
- case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
- case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
- case V4L2_CID_SHARPNESS: return "Sharpness";
- case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
- case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
- case V4L2_CID_COLOR_KILLER: return "Color Killer";
- case V4L2_CID_COLORFX: return "Color Effects";
- case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
- case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
- case V4L2_CID_ROTATE: return "Rotate";
- case V4L2_CID_BG_COLOR: return "Background Color";
- case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
- case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
- case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
-
- /* MPEG controls */
- /* Keep the order of the 'case's the same as in videodev2.h! */
- case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
- case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
- case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
- case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
- case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
- case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
- case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
- case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
- case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
- case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
- case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
- case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
- case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
- case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
- case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
- case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
- case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
- case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
- case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
- case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
- case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
- case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
- case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
- case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
- case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
- case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
- case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
- case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
- case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
- case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
- case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
- case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
- case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
-
- /* CAMERA controls */
- /* Keep the order of the 'case's the same as in videodev2.h! */
- case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
- case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
- case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
- case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
- case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
- case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
- case V4L2_CID_PAN_RESET: return "Pan, Reset";
- case V4L2_CID_TILT_RESET: return "Tilt, Reset";
- case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
- case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
- case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
- case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
- case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic";
- case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
- case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
- case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
- case V4L2_CID_PRIVACY: return "Privacy";
- case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
- case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
-
- /* FM Radio Modulator control */
- /* Keep the order of the 'case's the same as in videodev2.h! */
- case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
- case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
- case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
- case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
- case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
- case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
- case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
- case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
- case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
- case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Feature Enabled";
- case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
- case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
- case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
- case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
- case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
- case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
- case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
- case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-emphasis settings";
- case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
- case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
-
- default:
- return NULL;
- }
-}
-EXPORT_SYMBOL(v4l2_ctrl_get_name);
-
-void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
- s32 *min, s32 *max, s32 *step, s32 *def, u32 *flags)
-{
- *name = v4l2_ctrl_get_name(id);
- *flags = 0;
-
- switch (id) {
- case V4L2_CID_AUDIO_MUTE:
- case V4L2_CID_AUDIO_LOUDNESS:
- case V4L2_CID_AUTO_WHITE_BALANCE:
- case V4L2_CID_AUTOGAIN:
- case V4L2_CID_HFLIP:
- case V4L2_CID_VFLIP:
- case V4L2_CID_HUE_AUTO:
- case V4L2_CID_CHROMA_AGC:
- case V4L2_CID_COLOR_KILLER:
- case V4L2_CID_MPEG_AUDIO_MUTE:
- case V4L2_CID_MPEG_VIDEO_MUTE:
- case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
- case V4L2_CID_MPEG_VIDEO_PULLDOWN:
- case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
- case V4L2_CID_FOCUS_AUTO:
- case V4L2_CID_PRIVACY:
- case V4L2_CID_AUDIO_LIMITER_ENABLED:
- case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
- case V4L2_CID_PILOT_TONE_ENABLED:
- case V4L2_CID_ILLUMINATORS_1:
- case V4L2_CID_ILLUMINATORS_2:
- *type = V4L2_CTRL_TYPE_BOOLEAN;
- *min = 0;
- *max = *step = 1;
- break;
- case V4L2_CID_PAN_RESET:
- case V4L2_CID_TILT_RESET:
- *type = V4L2_CTRL_TYPE_BUTTON;
- *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
- *min = *max = *step = *def = 0;
- break;
- case V4L2_CID_POWER_LINE_FREQUENCY:
- case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
- case V4L2_CID_MPEG_AUDIO_ENCODING:
- case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
- case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
- case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
- case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
- case V4L2_CID_MPEG_AUDIO_MODE:
- case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
- case V4L2_CID_MPEG_AUDIO_EMPHASIS:
- case V4L2_CID_MPEG_AUDIO_CRC:
- case V4L2_CID_MPEG_VIDEO_ENCODING:
- case V4L2_CID_MPEG_VIDEO_ASPECT:
- case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
- case V4L2_CID_MPEG_STREAM_TYPE:
- case V4L2_CID_MPEG_STREAM_VBI_FMT:
- case V4L2_CID_EXPOSURE_AUTO:
- case V4L2_CID_COLORFX:
- case V4L2_CID_TUNE_PREEMPHASIS:
- *type = V4L2_CTRL_TYPE_MENU;
- break;
- case V4L2_CID_RDS_TX_PS_NAME:
- case V4L2_CID_RDS_TX_RADIO_TEXT:
- *type = V4L2_CTRL_TYPE_STRING;
- break;
- case V4L2_CID_USER_CLASS:
- case V4L2_CID_CAMERA_CLASS:
- case V4L2_CID_MPEG_CLASS:
- case V4L2_CID_FM_TX_CLASS:
- *type = V4L2_CTRL_TYPE_CTRL_CLASS;
- /* You can neither read not write these */
- *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
- *min = *max = *step = *def = 0;
- break;
- case V4L2_CID_BG_COLOR:
- *type = V4L2_CTRL_TYPE_INTEGER;
- *step = 1;
- *min = 0;
- /* Max is calculated as RGB888 that is 2^24 */
- *max = 0xFFFFFF;
- break;
- default:
- *type = V4L2_CTRL_TYPE_INTEGER;
- break;
- }
- switch (id) {
- case V4L2_CID_MPEG_AUDIO_ENCODING:
- case V4L2_CID_MPEG_AUDIO_MODE:
- case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
- case V4L2_CID_MPEG_VIDEO_B_FRAMES:
- case V4L2_CID_MPEG_STREAM_TYPE:
- *flags |= V4L2_CTRL_FLAG_UPDATE;
- break;
- case V4L2_CID_AUDIO_VOLUME:
- case V4L2_CID_AUDIO_BALANCE:
- case V4L2_CID_AUDIO_BASS:
- case V4L2_CID_AUDIO_TREBLE:
- case V4L2_CID_BRIGHTNESS:
- case V4L2_CID_CONTRAST:
- case V4L2_CID_SATURATION:
- case V4L2_CID_HUE:
- case V4L2_CID_RED_BALANCE:
- case V4L2_CID_BLUE_BALANCE:
- case V4L2_CID_GAMMA:
- case V4L2_CID_SHARPNESS:
- case V4L2_CID_CHROMA_GAIN:
- case V4L2_CID_RDS_TX_DEVIATION:
- case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
- case V4L2_CID_AUDIO_LIMITER_DEVIATION:
- case V4L2_CID_AUDIO_COMPRESSION_GAIN:
- case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
- case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
- case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
- case V4L2_CID_PILOT_TONE_DEVIATION:
- case V4L2_CID_PILOT_TONE_FREQUENCY:
- case V4L2_CID_TUNE_POWER_LEVEL:
- case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
- *flags |= V4L2_CTRL_FLAG_SLIDER;
- break;
- case V4L2_CID_PAN_RELATIVE:
- case V4L2_CID_TILT_RELATIVE:
- case V4L2_CID_FOCUS_RELATIVE:
- case V4L2_CID_IRIS_RELATIVE:
- case V4L2_CID_ZOOM_RELATIVE:
- *flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
- break;
- }
-}
-EXPORT_SYMBOL(v4l2_ctrl_fill);
-
-/* Helper function to determine whether the control type is compatible with
- VIDIOC_G/S_CTRL. */
-static bool type_is_int(const struct v4l2_ctrl *ctrl)
-{
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_INTEGER64:
- case V4L2_CTRL_TYPE_STRING:
- /* Nope, these need v4l2_ext_control */
- return false;
- default:
- return true;
- }
-}
-
-/* Helper function: copy the current control value back to the caller */
-static int cur_to_user(struct v4l2_ext_control *c,
- struct v4l2_ctrl *ctrl)
-{
- u32 len;
-
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_STRING:
- len = strlen(ctrl->cur.string);
- if (c->size < len + 1) {
- c->size = len + 1;
- return -ENOSPC;
- }
- return copy_to_user(c->string, ctrl->cur.string,
- len + 1) ? -EFAULT : 0;
- case V4L2_CTRL_TYPE_INTEGER64:
- c->value64 = ctrl->cur.val64;
- break;
- default:
- c->value = ctrl->cur.val;
- break;
- }
- return 0;
-}
-
-/* Helper function: copy the caller-provider value as the new control value */
-static int user_to_new(struct v4l2_ext_control *c,
- struct v4l2_ctrl *ctrl)
-{
- int ret;
- u32 size;
-
- ctrl->is_new = 1;
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_INTEGER64:
- ctrl->val64 = c->value64;
- break;
- case V4L2_CTRL_TYPE_STRING:
- size = c->size;
- if (size == 0)
- return -ERANGE;
- if (size > ctrl->maximum + 1)
- size = ctrl->maximum + 1;
- ret = copy_from_user(ctrl->string, c->string, size);
- if (!ret) {
- char last = ctrl->string[size - 1];
-
- ctrl->string[size - 1] = 0;
- /* If the string was longer than ctrl->maximum,
- then return an error. */
- if (strlen(ctrl->string) == ctrl->maximum && last)
- return -ERANGE;
- }
- return ret ? -EFAULT : 0;
- default:
- ctrl->val = c->value;
- break;
- }
- return 0;
-}
-
-/* Helper function: copy the new control value back to the caller */
-static int new_to_user(struct v4l2_ext_control *c,
- struct v4l2_ctrl *ctrl)
-{
- u32 len;
-
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_STRING:
- len = strlen(ctrl->string);
- if (c->size < len + 1) {
- c->size = ctrl->maximum + 1;
- return -ENOSPC;
- }
- return copy_to_user(c->string, ctrl->string,
- len + 1) ? -EFAULT : 0;
- case V4L2_CTRL_TYPE_INTEGER64:
- c->value64 = ctrl->val64;
- break;
- default:
- c->value = ctrl->val;
- break;
- }
- return 0;
-}
-
-/* Copy the new value to the current value. */
-static void new_to_cur(struct v4l2_ctrl *ctrl)
-{
- if (ctrl == NULL)
- return;
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_STRING:
- /* strings are always 0-terminated */
- strcpy(ctrl->cur.string, ctrl->string);
- break;
- case V4L2_CTRL_TYPE_INTEGER64:
- ctrl->cur.val64 = ctrl->val64;
- break;
- default:
- ctrl->cur.val = ctrl->val;
- break;
- }
-}
-
-/* Copy the current value to the new value */
-static void cur_to_new(struct v4l2_ctrl *ctrl)
-{
- if (ctrl == NULL)
- return;
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_STRING:
- /* strings are always 0-terminated */
- strcpy(ctrl->string, ctrl->cur.string);
- break;
- case V4L2_CTRL_TYPE_INTEGER64:
- ctrl->val64 = ctrl->cur.val64;
- break;
- default:
- ctrl->val = ctrl->cur.val;
- break;
- }
-}
-
-/* Return non-zero if one or more of the controls in the cluster has a new
- value that differs from the current value. */
-static int cluster_changed(struct v4l2_ctrl *master)
-{
- int diff = 0;
- int i;
-
- for (i = 0; !diff && i < master->ncontrols; i++) {
- struct v4l2_ctrl *ctrl = master->cluster[i];
-
- if (ctrl == NULL)
- continue;
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_BUTTON:
- /* Button controls are always 'different' */
- return 1;
- case V4L2_CTRL_TYPE_STRING:
- /* strings are always 0-terminated */
- diff = strcmp(ctrl->string, ctrl->cur.string);
- break;
- case V4L2_CTRL_TYPE_INTEGER64:
- diff = ctrl->val64 != ctrl->cur.val64;
- break;
- default:
- diff = ctrl->val != ctrl->cur.val;
- break;
- }
- }
- return diff;
-}
-
-/* Validate a new control */
-static int validate_new(struct v4l2_ctrl *ctrl)
-{
- s32 val = ctrl->val;
- char *s = ctrl->string;
- u32 offset;
- size_t len;
-
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_INTEGER:
- /* Round towards the closest legal value */
- val += ctrl->step / 2;
- if (val < ctrl->minimum)
- val = ctrl->minimum;
- if (val > ctrl->maximum)
- val = ctrl->maximum;
- offset = val - ctrl->minimum;
- offset = ctrl->step * (offset / ctrl->step);
- val = ctrl->minimum + offset;
- ctrl->val = val;
- return 0;
-
- case V4L2_CTRL_TYPE_BOOLEAN:
- ctrl->val = !!ctrl->val;
- return 0;
-
- case V4L2_CTRL_TYPE_MENU:
- if (val < ctrl->minimum || val > ctrl->maximum)
- return -ERANGE;
- if (ctrl->qmenu[val][0] == '\0' ||
- (ctrl->menu_skip_mask & (1 << val)))
- return -EINVAL;
- return 0;
-
- case V4L2_CTRL_TYPE_BUTTON:
- case V4L2_CTRL_TYPE_CTRL_CLASS:
- ctrl->val64 = 0;
- return 0;
-
- case V4L2_CTRL_TYPE_INTEGER64:
- return 0;
-
- case V4L2_CTRL_TYPE_STRING:
- len = strlen(s);
- if (len < ctrl->minimum)
- return -ERANGE;
- if ((len - ctrl->minimum) % ctrl->step)
- return -ERANGE;
- return 0;
-
- default:
- return -EINVAL;
- }
-}
-
-static inline u32 node2id(struct list_head *node)
-{
- return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
-}
-
-/* Set the handler's error code if it wasn't set earlier already */
-static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
-{
- if (hdl->error == 0)
- hdl->error = err;
- return err;
-}
-
-/* Initialize the handler */
-int v4l2_ctrl_handler_init(struct v4l2_ctrl_handler *hdl,
- unsigned nr_of_controls_hint)
-{
- mutex_init(&hdl->lock);
- INIT_LIST_HEAD(&hdl->ctrls);
- INIT_LIST_HEAD(&hdl->ctrl_refs);
- hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
- hdl->buckets = kzalloc(sizeof(hdl->buckets[0]) * hdl->nr_of_buckets,
- GFP_KERNEL);
- hdl->error = hdl->buckets ? 0 : -ENOMEM;
- return hdl->error;
-}
-EXPORT_SYMBOL(v4l2_ctrl_handler_init);
-
-/* Free all controls and control refs */
-void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
-{
- struct v4l2_ctrl_ref *ref, *next_ref;
- struct v4l2_ctrl *ctrl, *next_ctrl;
-
- if (hdl == NULL || hdl->buckets == NULL)
- return;
-
- mutex_lock(&hdl->lock);
- /* Free all nodes */
- list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
- list_del(&ref->node);
- kfree(ref);
- }
- /* Free all controls owned by the handler */
- list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
- list_del(&ctrl->node);
- kfree(ctrl);
- }
- kfree(hdl->buckets);
- hdl->buckets = NULL;
- hdl->cached = NULL;
- hdl->error = 0;
- mutex_unlock(&hdl->lock);
-}
-EXPORT_SYMBOL(v4l2_ctrl_handler_free);
-
-/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
- be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
- with applications that do not use the NEXT_CTRL flag.
-
- We just find the n-th private user control. It's O(N), but that should not
- be an issue in this particular case. */
-static struct v4l2_ctrl_ref *find_private_ref(
- struct v4l2_ctrl_handler *hdl, u32 id)
-{
- struct v4l2_ctrl_ref *ref;
-
- id -= V4L2_CID_PRIVATE_BASE;
- list_for_each_entry(ref, &hdl->ctrl_refs, node) {
- /* Search for private user controls that are compatible with
- VIDIOC_G/S_CTRL. */
- if (V4L2_CTRL_ID2CLASS(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
- V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
- if (!type_is_int(ref->ctrl))
- continue;
- if (id == 0)
- return ref;
- id--;
- }
- }
- return NULL;
-}
-
-/* Find a control with the given ID. */
-static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
-{
- struct v4l2_ctrl_ref *ref;
- int bucket;
-
- id &= V4L2_CTRL_ID_MASK;
-
- /* Old-style private controls need special handling */
- if (id >= V4L2_CID_PRIVATE_BASE)
- return find_private_ref(hdl, id);
- bucket = id % hdl->nr_of_buckets;
-
- /* Simple optimization: cache the last control found */
- if (hdl->cached && hdl->cached->ctrl->id == id)
- return hdl->cached;
-
- /* Not in cache, search the hash */
- ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
- while (ref && ref->ctrl->id != id)
- ref = ref->next;
-
- if (ref)
- hdl->cached = ref; /* cache it! */
- return ref;
-}
-
-/* Find a control with the given ID. Take the handler's lock first. */
-static struct v4l2_ctrl_ref *find_ref_lock(
- struct v4l2_ctrl_handler *hdl, u32 id)
-{
- struct v4l2_ctrl_ref *ref = NULL;
-
- if (hdl) {
- mutex_lock(&hdl->lock);
- ref = find_ref(hdl, id);
- mutex_unlock(&hdl->lock);
- }
- return ref;
-}
-
-/* Find a control with the given ID. */
-struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
-{
- struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
-
- return ref ? ref->ctrl : NULL;
-}
-EXPORT_SYMBOL(v4l2_ctrl_find);
-
-/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
-static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
- struct v4l2_ctrl *ctrl)
-{
- struct v4l2_ctrl_ref *ref;
- struct v4l2_ctrl_ref *new_ref;
- u32 id = ctrl->id;
- u32 class_ctrl = V4L2_CTRL_ID2CLASS(id) | 1;
- int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
-
- /* Automatically add the control class if it is not yet present. */
- if (id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
- if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
- return hdl->error;
-
- if (hdl->error)
- return hdl->error;
-
- new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
- if (!new_ref)
- return handler_set_err(hdl, -ENOMEM);
- new_ref->ctrl = ctrl;
- if (ctrl->handler == hdl) {
- /* By default each control starts in a cluster of its own.
- new_ref->ctrl is basically a cluster array with one
- element, so that's perfect to use as the cluster pointer.
- But only do this for the handler that owns the control. */
- ctrl->cluster = &new_ref->ctrl;
- ctrl->ncontrols = 1;
- }
-
- INIT_LIST_HEAD(&new_ref->node);
-
- mutex_lock(&hdl->lock);
-
- /* Add immediately at the end of the list if the list is empty, or if
- the last element in the list has a lower ID.
- This ensures that when elements are added in ascending order the
- insertion is an O(1) operation. */
- if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
- list_add_tail(&new_ref->node, &hdl->ctrl_refs);
- goto insert_in_hash;
- }
-
- /* Find insert position in sorted list */
- list_for_each_entry(ref, &hdl->ctrl_refs, node) {
- if (ref->ctrl->id < id)
- continue;
- /* Don't add duplicates */
- if (ref->ctrl->id == id) {
- kfree(new_ref);
- goto unlock;
- }
- list_add(&new_ref->node, ref->node.prev);
- break;
- }
-
-insert_in_hash:
- /* Insert the control node in the hash */
- new_ref->next = hdl->buckets[bucket];
- hdl->buckets[bucket] = new_ref;
-
-unlock:
- mutex_unlock(&hdl->lock);
- return 0;
-}
-
-/* Add a new control */
-static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
- const struct v4l2_ctrl_ops *ops,
- u32 id, const char *name, enum v4l2_ctrl_type type,
- s32 min, s32 max, u32 step, s32 def,
- u32 flags, const char * const *qmenu, void *priv)
-{
- struct v4l2_ctrl *ctrl;
- unsigned sz_extra = 0;
-
- if (hdl->error)
- return NULL;
-
- /* Sanity checks */
- if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
- max < min ||
- (type == V4L2_CTRL_TYPE_INTEGER && step == 0) ||
- (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
- (type == V4L2_CTRL_TYPE_STRING && max == 0)) {
- handler_set_err(hdl, -ERANGE);
- return NULL;
- }
- if ((type == V4L2_CTRL_TYPE_INTEGER ||
- type == V4L2_CTRL_TYPE_MENU ||
- type == V4L2_CTRL_TYPE_BOOLEAN) &&
- (def < min || def > max)) {
- handler_set_err(hdl, -ERANGE);
- return NULL;
- }
-
- if (type == V4L2_CTRL_TYPE_BUTTON)
- flags |= V4L2_CTRL_FLAG_WRITE_ONLY;
- else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
- flags |= V4L2_CTRL_FLAG_READ_ONLY;
- else if (type == V4L2_CTRL_TYPE_STRING)
- sz_extra += 2 * (max + 1);
-
- ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
- if (ctrl == NULL) {
- handler_set_err(hdl, -ENOMEM);
- return NULL;
- }
-
- INIT_LIST_HEAD(&ctrl->node);
- ctrl->handler = hdl;
- ctrl->ops = ops;
- ctrl->id = id;
- ctrl->name = name;
- ctrl->type = type;
- ctrl->flags = flags;
- ctrl->minimum = min;
- ctrl->maximum = max;
- ctrl->step = step;
- ctrl->qmenu = qmenu;
- ctrl->priv = priv;
- ctrl->cur.val = ctrl->val = ctrl->default_value = def;
-
- if (ctrl->type == V4L2_CTRL_TYPE_STRING) {
- ctrl->cur.string = (char *)&ctrl[1] + sz_extra - (max + 1);
- ctrl->string = (char *)&ctrl[1] + sz_extra - 2 * (max + 1);
- if (ctrl->minimum)
- memset(ctrl->cur.string, ' ', ctrl->minimum);
- }
- if (handler_new_ref(hdl, ctrl)) {
- kfree(ctrl);
- return NULL;
- }
- mutex_lock(&hdl->lock);
- list_add_tail(&ctrl->node, &hdl->ctrls);
- mutex_unlock(&hdl->lock);
- return ctrl;
-}
-
-struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
- const struct v4l2_ctrl_config *cfg, void *priv)
-{
- bool is_menu;
- struct v4l2_ctrl *ctrl;
- const char *name = cfg->name;
- const char * const *qmenu = cfg->qmenu;
- enum v4l2_ctrl_type type = cfg->type;
- u32 flags = cfg->flags;
- s32 min = cfg->min;
- s32 max = cfg->max;
- u32 step = cfg->step;
- s32 def = cfg->def;
-
- if (name == NULL)
- v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
- &def, &flags);
-
- is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU);
- if (is_menu)
- WARN_ON(step);
- else
- WARN_ON(cfg->menu_skip_mask);
- if (is_menu && qmenu == NULL)
- qmenu = v4l2_ctrl_get_menu(cfg->id);
-
- ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name,
- type, min, max,
- is_menu ? cfg->menu_skip_mask : step,
- def, flags, qmenu, priv);
- if (ctrl) {
- ctrl->is_private = cfg->is_private;
- ctrl->is_volatile = cfg->is_volatile;
- }
- return ctrl;
-}
-EXPORT_SYMBOL(v4l2_ctrl_new_custom);
-
-/* Helper function for standard non-menu controls */
-struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
- const struct v4l2_ctrl_ops *ops,
- u32 id, s32 min, s32 max, u32 step, s32 def)
-{
- const char *name;
- enum v4l2_ctrl_type type;
- u32 flags;
-
- v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
- if (type == V4L2_CTRL_TYPE_MENU) {
- handler_set_err(hdl, -EINVAL);
- return NULL;
- }
- return v4l2_ctrl_new(hdl, ops, id, name, type,
- min, max, step, def, flags, NULL, NULL);
-}
-EXPORT_SYMBOL(v4l2_ctrl_new_std);
-
-/* Helper function for standard menu controls */
-struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
- const struct v4l2_ctrl_ops *ops,
- u32 id, s32 max, s32 mask, s32 def)
-{
- const char * const *qmenu = v4l2_ctrl_get_menu(id);
- const char *name;
- enum v4l2_ctrl_type type;
- s32 min;
- s32 step;
- u32 flags;
-
- v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
- if (type != V4L2_CTRL_TYPE_MENU) {
- handler_set_err(hdl, -EINVAL);
- return NULL;
- }
- return v4l2_ctrl_new(hdl, ops, id, name, type,
- 0, max, mask, def, flags, qmenu, NULL);
-}
-EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
-
-/* Add a control from another handler to this handler */
-struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
- struct v4l2_ctrl *ctrl)
-{
- if (hdl == NULL || hdl->error)
- return NULL;
- if (ctrl == NULL) {
- handler_set_err(hdl, -EINVAL);
- return NULL;
- }
- if (ctrl->handler == hdl)
- return ctrl;
- return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
-}
-EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
-
-/* Add the controls from another handler to our own. */
-int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
- struct v4l2_ctrl_handler *add)
-{
- struct v4l2_ctrl *ctrl;
- int ret = 0;
-
- /* Do nothing if either handler is NULL or if they are the same */
- if (!hdl || !add || hdl == add)
- return 0;
- if (hdl->error)
- return hdl->error;
- mutex_lock(&add->lock);
- list_for_each_entry(ctrl, &add->ctrls, node) {
- /* Skip handler-private controls. */
- if (ctrl->is_private)
- continue;
- ret = handler_new_ref(hdl, ctrl);
- if (ret)
- break;
- }
- mutex_unlock(&add->lock);
- return ret;
-}
-EXPORT_SYMBOL(v4l2_ctrl_add_handler);
-
-/* Cluster controls */
-void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
-{
- int i;
-
- /* The first control is the master control and it must not be NULL */
- BUG_ON(controls[0] == NULL);
-
- for (i = 0; i < ncontrols; i++) {
- if (controls[i]) {
- controls[i]->cluster = controls;
- controls[i]->ncontrols = ncontrols;
- }
- }
-}
-EXPORT_SYMBOL(v4l2_ctrl_cluster);
-
-/* Activate/deactivate a control. */
-void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
-{
- if (ctrl == NULL)
- return;
-
- if (!active)
- /* set V4L2_CTRL_FLAG_INACTIVE */
- set_bit(4, &ctrl->flags);
- else
- /* clear V4L2_CTRL_FLAG_INACTIVE */
- clear_bit(4, &ctrl->flags);
-}
-EXPORT_SYMBOL(v4l2_ctrl_activate);
-
-/* Grab/ungrab a control.
- Typically used when streaming starts and you want to grab controls,
- preventing the user from changing them.
-
- Just call this and the framework will block any attempts to change
- these controls. */
-void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
-{
- if (ctrl == NULL)
- return;
-
- if (grabbed)
- /* set V4L2_CTRL_FLAG_GRABBED */
- set_bit(1, &ctrl->flags);
- else
- /* clear V4L2_CTRL_FLAG_GRABBED */
- clear_bit(1, &ctrl->flags);
-}
-EXPORT_SYMBOL(v4l2_ctrl_grab);
-
-/* Log the control name and value */
-static void log_ctrl(const struct v4l2_ctrl *ctrl,
- const char *prefix, const char *colon)
-{
- int fl_inact = ctrl->flags & V4L2_CTRL_FLAG_INACTIVE;
- int fl_grabbed = ctrl->flags & V4L2_CTRL_FLAG_GRABBED;
-
- if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
- return;
- if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
- return;
-
- printk(KERN_INFO "%s%s%s: ", prefix, colon, ctrl->name);
-
- switch (ctrl->type) {
- case V4L2_CTRL_TYPE_INTEGER:
- printk(KERN_CONT "%d", ctrl->cur.val);
- break;
- case V4L2_CTRL_TYPE_BOOLEAN:
- printk(KERN_CONT "%s", ctrl->cur.val ? "true" : "false");
- break;
- case V4L2_CTRL_TYPE_MENU:
- printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]);
- break;
- case V4L2_CTRL_TYPE_INTEGER64:
- printk(KERN_CONT "%lld", ctrl->cur.val64);
- break;
- case V4L2_CTRL_TYPE_STRING:
- printk(KERN_CONT "%s", ctrl->cur.string);
- break;
- default:
- printk(KERN_CONT "unknown type %d", ctrl->type);
- break;
- }
- if (fl_inact && fl_grabbed)
- printk(KERN_CONT " (inactive, grabbed)\n");
- else if (fl_inact)
- printk(KERN_CONT " (inactive)\n");
- else if (fl_grabbed)
- printk(KERN_CONT " (grabbed)\n");
- else
- printk(KERN_CONT "\n");
-}
-
-/* Log all controls owned by the handler */
-void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
- const char *prefix)
-{
- struct v4l2_ctrl *ctrl;
- const char *colon = "";
- int len;
-
- if (hdl == NULL)
- return;
- if (prefix == NULL)
- prefix = "";
- len = strlen(prefix);
- if (len && prefix[len - 1] != ' ')
- colon = ": ";
- mutex_lock(&hdl->lock);
- list_for_each_entry(ctrl, &hdl->ctrls, node)
- if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
- log_ctrl(ctrl, prefix, colon);
- mutex_unlock(&hdl->lock);
-}
-EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
-
-/* Call s_ctrl for all controls owned by the handler */
-int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
-{
- struct v4l2_ctrl *ctrl;
- int ret = 0;
-
- if (hdl == NULL)
- return 0;
- mutex_lock(&hdl->lock);
- list_for_each_entry(ctrl, &hdl->ctrls, node)
- ctrl->done = false;
-
- list_for_each_entry(ctrl, &hdl->ctrls, node) {
- struct v4l2_ctrl *master = ctrl->cluster[0];
- int i;
-
- /* Skip if this control was already handled by a cluster. */
- if (ctrl->done)
- continue;
-
- for (i = 0; i < master->ncontrols; i++) {
- if (master->cluster[i]) {
- cur_to_new(master->cluster[i]);
- master->cluster[i]->is_new = 1;
- }
- }
-
- /* Skip button controls and read-only controls. */
- if (ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
- (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
- continue;
- ret = master->ops->s_ctrl(master);
- if (ret)
- break;
- for (i = 0; i < master->ncontrols; i++)
- if (master->cluster[i])
- master->cluster[i]->done = true;
- }
- mutex_unlock(&hdl->lock);
- return ret;
-}
-EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
-
-/* Implement VIDIOC_QUERYCTRL */
-int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
-{
- u32 id = qc->id & V4L2_CTRL_ID_MASK;
- struct v4l2_ctrl_ref *ref;
- struct v4l2_ctrl *ctrl;
-
- if (hdl == NULL)
- return -EINVAL;
-
- mutex_lock(&hdl->lock);
-
- /* Try to find it */
- ref = find_ref(hdl, id);
-
- if ((qc->id & V4L2_CTRL_FLAG_NEXT_CTRL) && !list_empty(&hdl->ctrl_refs)) {
- /* Find the next control with ID > qc->id */
-
- /* Did we reach the end of the control list? */
- if (id >= node2id(hdl->ctrl_refs.prev)) {
- ref = NULL; /* Yes, so there is no next control */
- } else if (ref) {
- /* We found a control with the given ID, so just get
- the next one in the list. */
- ref = list_entry(ref->node.next, typeof(*ref), node);
- } else {
- /* No control with the given ID exists, so start
- searching for the next largest ID. We know there
- is one, otherwise the first 'if' above would have
- been true. */
- list_for_each_entry(ref, &hdl->ctrl_refs, node)
- if (id < ref->ctrl->id)
- break;
- }
- }
- mutex_unlock(&hdl->lock);
- if (!ref)
- return -EINVAL;
-
- ctrl = ref->ctrl;
- memset(qc, 0, sizeof(*qc));
- if (id >= V4L2_CID_PRIVATE_BASE)
- qc->id = id;
- else
- qc->id = ctrl->id;
- strlcpy(qc->name, ctrl->name, sizeof(qc->name));
- qc->minimum = ctrl->minimum;
- qc->maximum = ctrl->maximum;
- qc->default_value = ctrl->default_value;
- if (ctrl->type == V4L2_CTRL_TYPE_MENU)
- qc->step = 1;
- else
- qc->step = ctrl->step;
- qc->flags = ctrl->flags;
- qc->type = ctrl->type;
- return 0;
-}
-EXPORT_SYMBOL(v4l2_queryctrl);
-
-int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
-{
- return v4l2_queryctrl(sd->ctrl_handler, qc);
-}
-EXPORT_SYMBOL(v4l2_subdev_queryctrl);
-
-/* Implement VIDIOC_QUERYMENU */
-int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
-{
- struct v4l2_ctrl *ctrl;
- u32 i = qm->index;
-
- ctrl = v4l2_ctrl_find(hdl, qm->id);
- if (!ctrl)
- return -EINVAL;
-
- qm->reserved = 0;
- /* Sanity checks */
- if (ctrl->qmenu == NULL ||
- i < ctrl->minimum || i > ctrl->maximum)
- return -EINVAL;
- /* Use mask to see if this menu item should be skipped */
- if (ctrl->menu_skip_mask & (1 << i))
- return -EINVAL;
- /* Empty menu items should also be skipped */
- if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
- return -EINVAL;
- strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
- return 0;
-}
-EXPORT_SYMBOL(v4l2_querymenu);
-
-int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
-{
- return v4l2_querymenu(sd->ctrl_handler, qm);
-}
-EXPORT_SYMBOL(v4l2_subdev_querymenu);
-
-
-
-/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
-
- It is not a fully atomic operation, just best-effort only. After all, if
- multiple controls have to be set through multiple i2c writes (for example)
- then some initial writes may succeed while others fail. Thus leaving the
- system in an inconsistent state. The question is how much effort you are
- willing to spend on trying to make something atomic that really isn't.
-
- From the point of view of an application the main requirement is that
- when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
- error should be returned without actually affecting any controls.
-
- If all the values are correct, then it is acceptable to just give up
- in case of low-level errors.
-
- It is important though that the application can tell when only a partial
- configuration was done. The way we do that is through the error_idx field
- of struct v4l2_ext_controls: if that is equal to the count field then no
- controls were affected. Otherwise all controls before that index were
- successful in performing their 'get' or 'set' operation, the control at
- the given index failed, and you don't know what happened with the controls
- after the failed one. Since if they were part of a control cluster they
- could have been successfully processed (if a cluster member was encountered
- at index < error_idx), they could have failed (if a cluster member was at
- error_idx), or they may not have been processed yet (if the first cluster
- member appeared after error_idx).
-
- It is all fairly theoretical, though. In practice all you can do is to
- bail out. If error_idx == count, then it is an application bug. If
- error_idx < count then it is only an application bug if the error code was
- EBUSY. That usually means that something started streaming just when you
- tried to set the controls. In all other cases it is a driver/hardware
- problem and all you can do is to retry or bail out.
-
- Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
- never modifies controls the error_idx is just set to whatever control
- has an invalid value.
- */
-
-/* Prepare for the extended g/s/try functions.
- Find the controls in the control array and do some basic checks. */
-static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *cs,
- struct ctrl_helper *helpers,
- bool try)
-{
- u32 i;
-
- for (i = 0; i < cs->count; i++) {
- struct v4l2_ext_control *c = &cs->controls[i];
- struct v4l2_ctrl *ctrl;
- u32 id = c->id & V4L2_CTRL_ID_MASK;
-
- if (try)
- cs->error_idx = i;
-
- if (cs->ctrl_class && V4L2_CTRL_ID2CLASS(id) != cs->ctrl_class)
- return -EINVAL;
-
- /* Old-style private controls are not allowed for
- extended controls */
- if (id >= V4L2_CID_PRIVATE_BASE)
- return -EINVAL;
- ctrl = v4l2_ctrl_find(hdl, id);
- if (ctrl == NULL)
- return -EINVAL;
- if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
- return -EINVAL;
-
- helpers[i].ctrl = ctrl;
- helpers[i].handled = false;
- }
- return 0;
-}
-
-typedef int (*cluster_func)(struct v4l2_ext_control *c,
- struct v4l2_ctrl *ctrl);
-
-/* Walk over all controls in v4l2_ext_controls belonging to the same cluster
- and call the provided function. */
-static int cluster_walk(unsigned from,
- struct v4l2_ext_controls *cs,
- struct ctrl_helper *helpers,
- cluster_func f)
-{
- struct v4l2_ctrl **cluster = helpers[from].ctrl->cluster;
- int ret = 0;
- int i;
-
- /* Find any controls from the same cluster and call the function */
- for (i = from; !ret && i < cs->count; i++) {
- struct v4l2_ctrl *ctrl = helpers[i].ctrl;
-
- if (!helpers[i].handled && ctrl->cluster == cluster)
- ret = f(&cs->controls[i], ctrl);
- }
- return ret;
-}
-
-static void cluster_done(unsigned from,
- struct v4l2_ext_controls *cs,
- struct ctrl_helper *helpers)
-{
- struct v4l2_ctrl **cluster = helpers[from].ctrl->cluster;
- int i;
-
- /* Find any controls from the same cluster and mark them as handled */
- for (i = from; i < cs->count; i++)
- if (helpers[i].ctrl->cluster == cluster)
- helpers[i].handled = true;
-}
-
-/* Handles the corner case where cs->count == 0. It checks whether the
- specified control class exists. If that class ID is 0, then it checks
- whether there are any controls at all. */
-static int class_check(struct v4l2_ctrl_handler *hdl, u32 ctrl_class)
-{
- if (ctrl_class == 0)
- return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
- return find_ref_lock(hdl, ctrl_class | 1) ? 0 : -EINVAL;
-}
-
-
-
-/* Get extended controls. Allocates the helpers array if needed. */
-int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
-{
- struct ctrl_helper helper[4];
- struct ctrl_helper *helpers = helper;
- int ret;
- int i;
-
- cs->error_idx = cs->count;
- cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
-
- if (hdl == NULL)
- return -EINVAL;
-
- if (cs->count == 0)
- return class_check(hdl, cs->ctrl_class);
-
- if (cs->count > ARRAY_SIZE(helper)) {
- helpers = kmalloc(sizeof(helper[0]) * cs->count, GFP_KERNEL);
- if (helpers == NULL)
- return -ENOMEM;
- }
-
- ret = prepare_ext_ctrls(hdl, cs, helpers, false);
-
- for (i = 0; !ret && i < cs->count; i++)
- if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
- ret = -EACCES;
-
- for (i = 0; !ret && i < cs->count; i++) {
- struct v4l2_ctrl *ctrl = helpers[i].ctrl;
- struct v4l2_ctrl *master = ctrl->cluster[0];
-
- if (helpers[i].handled)
- continue;
-
- cs->error_idx = i;
-
- v4l2_ctrl_lock(master);
- /* g_volatile_ctrl will update the current control values */
- if (ctrl->is_volatile && master->ops->g_volatile_ctrl)
- ret = master->ops->g_volatile_ctrl(master);
- /* If OK, then copy the current control values to the caller */
- if (!ret)
- ret = cluster_walk(i, cs, helpers, cur_to_user);
- v4l2_ctrl_unlock(master);
- cluster_done(i, cs, helpers);
- }
-
- if (cs->count > ARRAY_SIZE(helper))
- kfree(helpers);
- return ret;
-}
-EXPORT_SYMBOL(v4l2_g_ext_ctrls);
-
-int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
-{
- return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
-}
-EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
-
-/* Helper function to get a single control */
-static int get_ctrl(struct v4l2_ctrl *ctrl, s32 *val)
-{
- struct v4l2_ctrl *master = ctrl->cluster[0];
- int ret = 0;
-
- if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
- return -EACCES;
-
- v4l2_ctrl_lock(master);
- /* g_volatile_ctrl will update the current control values */
- if (ctrl->is_volatile && master->ops->g_volatile_ctrl)
- ret = master->ops->g_volatile_ctrl(master);
- *val = ctrl->cur.val;
- v4l2_ctrl_unlock(master);
- return ret;
-}
-
-int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
-{
- struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
-
- if (ctrl == NULL || !type_is_int(ctrl))
- return -EINVAL;
- return get_ctrl(ctrl, &control->value);
-}
-EXPORT_SYMBOL(v4l2_g_ctrl);
-
-int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
-{
- return v4l2_g_ctrl(sd->ctrl_handler, control);
-}
-EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
-
-s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
-{
- s32 val = 0;
-
- /* It's a driver bug if this happens. */
- WARN_ON(!type_is_int(ctrl));
- get_ctrl(ctrl, &val);
- return val;
-}
-EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
-
-
-/* Core function that calls try/s_ctrl and ensures that the new value is
- copied to the current value on a set.
- Must be called with ctrl->handler->lock held. */
-static int try_or_set_control_cluster(struct v4l2_ctrl *master, bool set)
-{
- bool try = !set;
- int ret = 0;
- int i;
-
- /* Go through the cluster and either validate the new value or
- (if no new value was set), copy the current value to the new
- value, ensuring a consistent view for the control ops when
- called. */
- for (i = 0; !ret && i < master->ncontrols; i++) {
- struct v4l2_ctrl *ctrl = master->cluster[i];
-
- if (ctrl == NULL)
- continue;
-
- if (ctrl->is_new) {
- /* Double check this: it may have changed since the
- last check in try_or_set_ext_ctrls(). */
- if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
- return -EBUSY;
-
- /* Validate if required */
- if (!set)
- ret = validate_new(ctrl);
- continue;
- }
- /* No new value was set, so copy the current and force
- a call to try_ctrl later, since the values for the cluster
- may now have changed and the end result might be invalid. */
- try = true;
- cur_to_new(ctrl);
- }
-
- /* For larger clusters you have to call try_ctrl again to
- verify that the controls are still valid after the
- 'cur_to_new' above. */
- if (!ret && master->ops->try_ctrl && try)
- ret = master->ops->try_ctrl(master);
-
- /* Don't set if there is no change */
- if (!ret && set && cluster_changed(master)) {
- ret = master->ops->s_ctrl(master);
- /* If OK, then make the new values permanent. */
- if (!ret)
- for (i = 0; i < master->ncontrols; i++)
- new_to_cur(master->cluster[i]);
- }
- return ret;
-}
-
-/* Try or set controls. */
-static int try_or_set_ext_ctrls(struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *cs,
- struct ctrl_helper *helpers,
- bool set)
-{
- unsigned i, j;
- int ret = 0;
-
- cs->error_idx = cs->count;
- for (i = 0; i < cs->count; i++) {
- struct v4l2_ctrl *ctrl = helpers[i].ctrl;
-
- if (!set)
- cs->error_idx = i;
-
- if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
- return -EACCES;
- /* This test is also done in try_set_control_cluster() which
- is called in atomic context, so that has the final say,
- but it makes sense to do an up-front check as well. Once
- an error occurs in try_set_control_cluster() some other
- controls may have been set already and we want to do a
- best-effort to avoid that. */
- if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
- return -EBUSY;
- }
-
- for (i = 0; !ret && i < cs->count; i++) {
- struct v4l2_ctrl *ctrl = helpers[i].ctrl;
- struct v4l2_ctrl *master = ctrl->cluster[0];
-
- cs->error_idx = i;
-
- if (helpers[i].handled)
- continue;
-
- v4l2_ctrl_lock(ctrl);
-
- /* Reset the 'is_new' flags of the cluster */
- for (j = 0; j < master->ncontrols; j++)
- if (master->cluster[j])
- master->cluster[j]->is_new = 0;
-
- /* Copy the new caller-supplied control values.
- user_to_new() sets 'is_new' to 1. */
- ret = cluster_walk(i, cs, helpers, user_to_new);
-
- if (!ret)
- ret = try_or_set_control_cluster(master, set);
-
- /* Copy the new values back to userspace. */
- if (!ret)
- ret = cluster_walk(i, cs, helpers, new_to_user);
-
- v4l2_ctrl_unlock(ctrl);
- cluster_done(i, cs, helpers);
- }
- return ret;
-}
-
-/* Try or try-and-set controls */
-static int try_set_ext_ctrls(struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *cs,
- bool set)
-{
- struct ctrl_helper helper[4];
- struct ctrl_helper *helpers = helper;
- int ret;
- int i;
-
- cs->error_idx = cs->count;
- cs->ctrl_class = V4L2_CTRL_ID2CLASS(cs->ctrl_class);
-
- if (hdl == NULL)
- return -EINVAL;
-
- if (cs->count == 0)
- return class_check(hdl, cs->ctrl_class);
-
- if (cs->count > ARRAY_SIZE(helper)) {
- helpers = kmalloc(sizeof(helper[0]) * cs->count, GFP_KERNEL);
- if (!helpers)
- return -ENOMEM;
- }
- ret = prepare_ext_ctrls(hdl, cs, helpers, !set);
- if (ret)
- goto free;
-
- /* First 'try' all controls and abort on error */
- ret = try_or_set_ext_ctrls(hdl, cs, helpers, false);
- /* If this is a 'set' operation and the initial 'try' failed,
- then set error_idx to count to tell the application that no
- controls changed value yet. */
- if (set)
- cs->error_idx = cs->count;
- if (!ret && set) {
- /* Reset 'handled' state */
- for (i = 0; i < cs->count; i++)
- helpers[i].handled = false;
- ret = try_or_set_ext_ctrls(hdl, cs, helpers, true);
- }
-
-free:
- if (cs->count > ARRAY_SIZE(helper))
- kfree(helpers);
- return ret;
-}
-
-int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
-{
- return try_set_ext_ctrls(hdl, cs, false);
-}
-EXPORT_SYMBOL(v4l2_try_ext_ctrls);
-
-int v4l2_s_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
-{
- return try_set_ext_ctrls(hdl, cs, true);
-}
-EXPORT_SYMBOL(v4l2_s_ext_ctrls);
-
-int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
-{
- return try_set_ext_ctrls(sd->ctrl_handler, cs, false);
-}
-EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
-
-int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
-{
- return try_set_ext_ctrls(sd->ctrl_handler, cs, true);
-}
-EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
-
-/* Helper function for VIDIOC_S_CTRL compatibility */
-static int set_ctrl(struct v4l2_ctrl *ctrl, s32 *val)
-{
- struct v4l2_ctrl *master = ctrl->cluster[0];
- int ret;
- int i;
-
- if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
- return -EACCES;
-
- v4l2_ctrl_lock(ctrl);
-
- /* Reset the 'is_new' flags of the cluster */
- for (i = 0; i < master->ncontrols; i++)
- if (master->cluster[i])
- master->cluster[i]->is_new = 0;
-
- ctrl->val = *val;
- ctrl->is_new = 1;
- ret = try_or_set_control_cluster(master, false);
- if (!ret)
- ret = try_or_set_control_cluster(master, true);
- *val = ctrl->cur.val;
- v4l2_ctrl_unlock(ctrl);
- return ret;
-}
-
-int v4l2_s_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
-{
- struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
-
- if (ctrl == NULL || !type_is_int(ctrl))
- return -EINVAL;
-
- return set_ctrl(ctrl, &control->value);
-}
-EXPORT_SYMBOL(v4l2_s_ctrl);
-
-int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
-{
- return v4l2_s_ctrl(sd->ctrl_handler, control);
-}
-EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
-
-int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
-{
- /* It's a driver bug if this happens. */
- WARN_ON(!type_is_int(ctrl));
- return set_ctrl(ctrl, &val);
-}
-EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-11 15:22:30 +0000