linux/include/media/v4l2-ioctl.h
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   1/*
   2 *
   3 *      V 4 L 2   D R I V E R   H E L P E R   A P I
   4 *
   5 * Moved from videodev2.h
   6 *
   7 *      Some commonly needed functions for drivers (v4l2-common.o module)
   8 */
   9#ifndef _V4L2_IOCTL_H
  10#define _V4L2_IOCTL_H
  11
  12#include <linux/poll.h>
  13#include <linux/fs.h>
  14#include <linux/mutex.h>
  15#include <linux/compiler.h> /* need __user */
  16#include <linux/videodev2.h>
  17
  18struct v4l2_fh;
  19
  20struct v4l2_ioctl_ops {
  21        /* ioctl callbacks */
  22
  23        /* VIDIOC_QUERYCAP handler */
  24        int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
  25
  26        /* Priority handling */
  27        int (*vidioc_g_priority)   (struct file *file, void *fh,
  28                                    enum v4l2_priority *p);
  29        int (*vidioc_s_priority)   (struct file *file, void *fh,
  30                                    enum v4l2_priority p);
  31
  32        /* VIDIOC_ENUM_FMT handlers */
  33        int (*vidioc_enum_fmt_vid_cap)     (struct file *file, void *fh,
  34                                            struct v4l2_fmtdesc *f);
  35        int (*vidioc_enum_fmt_vid_overlay) (struct file *file, void *fh,
  36                                            struct v4l2_fmtdesc *f);
  37        int (*vidioc_enum_fmt_vid_out)     (struct file *file, void *fh,
  38                                            struct v4l2_fmtdesc *f);
  39        int (*vidioc_enum_fmt_vid_cap_mplane)(struct file *file, void *fh,
  40                                              struct v4l2_fmtdesc *f);
  41        int (*vidioc_enum_fmt_vid_out_mplane)(struct file *file, void *fh,
  42                                              struct v4l2_fmtdesc *f);
  43
  44        /* VIDIOC_G_FMT handlers */
  45        int (*vidioc_g_fmt_vid_cap)    (struct file *file, void *fh,
  46                                        struct v4l2_format *f);
  47        int (*vidioc_g_fmt_vid_overlay)(struct file *file, void *fh,
  48                                        struct v4l2_format *f);
  49        int (*vidioc_g_fmt_vid_out)    (struct file *file, void *fh,
  50                                        struct v4l2_format *f);
  51        int (*vidioc_g_fmt_vid_out_overlay)(struct file *file, void *fh,
  52                                        struct v4l2_format *f);
  53        int (*vidioc_g_fmt_vbi_cap)    (struct file *file, void *fh,
  54                                        struct v4l2_format *f);
  55        int (*vidioc_g_fmt_vbi_out)    (struct file *file, void *fh,
  56                                        struct v4l2_format *f);
  57        int (*vidioc_g_fmt_sliced_vbi_cap)(struct file *file, void *fh,
  58                                        struct v4l2_format *f);
  59        int (*vidioc_g_fmt_sliced_vbi_out)(struct file *file, void *fh,
  60                                        struct v4l2_format *f);
  61        int (*vidioc_g_fmt_vid_cap_mplane)(struct file *file, void *fh,
  62                                           struct v4l2_format *f);
  63        int (*vidioc_g_fmt_vid_out_mplane)(struct file *file, void *fh,
  64                                           struct v4l2_format *f);
  65
  66        /* VIDIOC_S_FMT handlers */
  67        int (*vidioc_s_fmt_vid_cap)    (struct file *file, void *fh,
  68                                        struct v4l2_format *f);
  69        int (*vidioc_s_fmt_vid_overlay)(struct file *file, void *fh,
  70                                        struct v4l2_format *f);
  71        int (*vidioc_s_fmt_vid_out)    (struct file *file, void *fh,
  72                                        struct v4l2_format *f);
  73        int (*vidioc_s_fmt_vid_out_overlay)(struct file *file, void *fh,
  74                                        struct v4l2_format *f);
  75        int (*vidioc_s_fmt_vbi_cap)    (struct file *file, void *fh,
  76                                        struct v4l2_format *f);
  77        int (*vidioc_s_fmt_vbi_out)    (struct file *file, void *fh,
  78                                        struct v4l2_format *f);
  79        int (*vidioc_s_fmt_sliced_vbi_cap)(struct file *file, void *fh,
  80                                        struct v4l2_format *f);
  81        int (*vidioc_s_fmt_sliced_vbi_out)(struct file *file, void *fh,
  82                                        struct v4l2_format *f);
  83        int (*vidioc_s_fmt_vid_cap_mplane)(struct file *file, void *fh,
  84                                           struct v4l2_format *f);
  85        int (*vidioc_s_fmt_vid_out_mplane)(struct file *file, void *fh,
  86                                           struct v4l2_format *f);
  87
  88        /* VIDIOC_TRY_FMT handlers */
  89        int (*vidioc_try_fmt_vid_cap)    (struct file *file, void *fh,
  90                                          struct v4l2_format *f);
  91        int (*vidioc_try_fmt_vid_overlay)(struct file *file, void *fh,
  92                                          struct v4l2_format *f);
  93        int (*vidioc_try_fmt_vid_out)    (struct file *file, void *fh,
  94                                          struct v4l2_format *f);
  95        int (*vidioc_try_fmt_vid_out_overlay)(struct file *file, void *fh,
  96                                          struct v4l2_format *f);
  97        int (*vidioc_try_fmt_vbi_cap)    (struct file *file, void *fh,
  98                                          struct v4l2_format *f);
  99        int (*vidioc_try_fmt_vbi_out)    (struct file *file, void *fh,
 100                                          struct v4l2_format *f);
 101        int (*vidioc_try_fmt_sliced_vbi_cap)(struct file *file, void *fh,
 102                                          struct v4l2_format *f);
 103        int (*vidioc_try_fmt_sliced_vbi_out)(struct file *file, void *fh,
 104                                          struct v4l2_format *f);
 105        int (*vidioc_try_fmt_vid_cap_mplane)(struct file *file, void *fh,
 106                                             struct v4l2_format *f);
 107        int (*vidioc_try_fmt_vid_out_mplane)(struct file *file, void *fh,
 108                                             struct v4l2_format *f);
 109
 110        /* Buffer handlers */
 111        int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
 112        int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
 113        int (*vidioc_qbuf)    (struct file *file, void *fh, struct v4l2_buffer *b);
 114        int (*vidioc_dqbuf)   (struct file *file, void *fh, struct v4l2_buffer *b);
 115
 116        int (*vidioc_create_bufs)(struct file *file, void *fh, struct v4l2_create_buffers *b);
 117        int (*vidioc_prepare_buf)(struct file *file, void *fh, struct v4l2_buffer *b);
 118
 119        int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
 120        int (*vidioc_g_fbuf)   (struct file *file, void *fh,
 121                                struct v4l2_framebuffer *a);
 122        int (*vidioc_s_fbuf)   (struct file *file, void *fh,
 123                                const struct v4l2_framebuffer *a);
 124
 125                /* Stream on/off */
 126        int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
 127        int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
 128
 129                /* Standard handling
 130                        ENUMSTD is handled by videodev.c
 131                 */
 132        int (*vidioc_g_std) (struct file *file, void *fh, v4l2_std_id *norm);
 133        int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id *norm);
 134        int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
 135
 136                /* Input handling */
 137        int (*vidioc_enum_input)(struct file *file, void *fh,
 138                                 struct v4l2_input *inp);
 139        int (*vidioc_g_input)   (struct file *file, void *fh, unsigned int *i);
 140        int (*vidioc_s_input)   (struct file *file, void *fh, unsigned int i);
 141
 142                /* Output handling */
 143        int (*vidioc_enum_output) (struct file *file, void *fh,
 144                                  struct v4l2_output *a);
 145        int (*vidioc_g_output)   (struct file *file, void *fh, unsigned int *i);
 146        int (*vidioc_s_output)   (struct file *file, void *fh, unsigned int i);
 147
 148                /* Control handling */
 149        int (*vidioc_queryctrl)        (struct file *file, void *fh,
 150                                        struct v4l2_queryctrl *a);
 151        int (*vidioc_g_ctrl)           (struct file *file, void *fh,
 152                                        struct v4l2_control *a);
 153        int (*vidioc_s_ctrl)           (struct file *file, void *fh,
 154                                        struct v4l2_control *a);
 155        int (*vidioc_g_ext_ctrls)      (struct file *file, void *fh,
 156                                        struct v4l2_ext_controls *a);
 157        int (*vidioc_s_ext_ctrls)      (struct file *file, void *fh,
 158                                        struct v4l2_ext_controls *a);
 159        int (*vidioc_try_ext_ctrls)    (struct file *file, void *fh,
 160                                        struct v4l2_ext_controls *a);
 161        int (*vidioc_querymenu)        (struct file *file, void *fh,
 162                                        struct v4l2_querymenu *a);
 163
 164        /* Audio ioctls */
 165        int (*vidioc_enumaudio)        (struct file *file, void *fh,
 166                                        struct v4l2_audio *a);
 167        int (*vidioc_g_audio)          (struct file *file, void *fh,
 168                                        struct v4l2_audio *a);
 169        int (*vidioc_s_audio)          (struct file *file, void *fh,
 170                                        const struct v4l2_audio *a);
 171
 172        /* Audio out ioctls */
 173        int (*vidioc_enumaudout)       (struct file *file, void *fh,
 174                                        struct v4l2_audioout *a);
 175        int (*vidioc_g_audout)         (struct file *file, void *fh,
 176                                        struct v4l2_audioout *a);
 177        int (*vidioc_s_audout)         (struct file *file, void *fh,
 178                                        const struct v4l2_audioout *a);
 179        int (*vidioc_g_modulator)      (struct file *file, void *fh,
 180                                        struct v4l2_modulator *a);
 181        int (*vidioc_s_modulator)      (struct file *file, void *fh,
 182                                        const struct v4l2_modulator *a);
 183        /* Crop ioctls */
 184        int (*vidioc_cropcap)          (struct file *file, void *fh,
 185                                        struct v4l2_cropcap *a);
 186        int (*vidioc_g_crop)           (struct file *file, void *fh,
 187                                        struct v4l2_crop *a);
 188        int (*vidioc_s_crop)           (struct file *file, void *fh,
 189                                        const struct v4l2_crop *a);
 190        int (*vidioc_g_selection)      (struct file *file, void *fh,
 191                                        struct v4l2_selection *s);
 192        int (*vidioc_s_selection)      (struct file *file, void *fh,
 193                                        struct v4l2_selection *s);
 194        /* Compression ioctls */
 195        int (*vidioc_g_jpegcomp)       (struct file *file, void *fh,
 196                                        struct v4l2_jpegcompression *a);
 197        int (*vidioc_s_jpegcomp)       (struct file *file, void *fh,
 198                                        const struct v4l2_jpegcompression *a);
 199        int (*vidioc_g_enc_index)      (struct file *file, void *fh,
 200                                        struct v4l2_enc_idx *a);
 201        int (*vidioc_encoder_cmd)      (struct file *file, void *fh,
 202                                        struct v4l2_encoder_cmd *a);
 203        int (*vidioc_try_encoder_cmd)  (struct file *file, void *fh,
 204                                        struct v4l2_encoder_cmd *a);
 205        int (*vidioc_decoder_cmd)      (struct file *file, void *fh,
 206                                        struct v4l2_decoder_cmd *a);
 207        int (*vidioc_try_decoder_cmd)  (struct file *file, void *fh,
 208                                        struct v4l2_decoder_cmd *a);
 209
 210        /* Stream type-dependent parameter ioctls */
 211        int (*vidioc_g_parm)           (struct file *file, void *fh,
 212                                        struct v4l2_streamparm *a);
 213        int (*vidioc_s_parm)           (struct file *file, void *fh,
 214                                        struct v4l2_streamparm *a);
 215
 216        /* Tuner ioctls */
 217        int (*vidioc_g_tuner)          (struct file *file, void *fh,
 218                                        struct v4l2_tuner *a);
 219        int (*vidioc_s_tuner)          (struct file *file, void *fh,
 220                                        struct v4l2_tuner *a);
 221        int (*vidioc_g_frequency)      (struct file *file, void *fh,
 222                                        struct v4l2_frequency *a);
 223        int (*vidioc_s_frequency)      (struct file *file, void *fh,
 224                                        struct v4l2_frequency *a);
 225        int (*vidioc_enum_freq_bands) (struct file *file, void *fh,
 226                                    struct v4l2_frequency_band *band);
 227
 228        /* Sliced VBI cap */
 229        int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
 230                                        struct v4l2_sliced_vbi_cap *a);
 231
 232        /* Log status ioctl */
 233        int (*vidioc_log_status)       (struct file *file, void *fh);
 234
 235        int (*vidioc_s_hw_freq_seek)   (struct file *file, void *fh,
 236                                        const struct v4l2_hw_freq_seek *a);
 237
 238        /* Debugging ioctls */
 239#ifdef CONFIG_VIDEO_ADV_DEBUG
 240        int (*vidioc_g_register)       (struct file *file, void *fh,
 241                                        struct v4l2_dbg_register *reg);
 242        int (*vidioc_s_register)       (struct file *file, void *fh,
 243                                        struct v4l2_dbg_register *reg);
 244#endif
 245        int (*vidioc_g_chip_ident)     (struct file *file, void *fh,
 246                                        struct v4l2_dbg_chip_ident *chip);
 247
 248        int (*vidioc_enum_framesizes)   (struct file *file, void *fh,
 249                                         struct v4l2_frmsizeenum *fsize);
 250
 251        int (*vidioc_enum_frameintervals) (struct file *file, void *fh,
 252                                           struct v4l2_frmivalenum *fival);
 253
 254        /* DV Timings IOCTLs */
 255        int (*vidioc_enum_dv_presets) (struct file *file, void *fh,
 256                                       struct v4l2_dv_enum_preset *preset);
 257
 258        int (*vidioc_s_dv_preset) (struct file *file, void *fh,
 259                                   struct v4l2_dv_preset *preset);
 260        int (*vidioc_g_dv_preset) (struct file *file, void *fh,
 261                                   struct v4l2_dv_preset *preset);
 262        int (*vidioc_query_dv_preset) (struct file *file, void *fh,
 263                                        struct v4l2_dv_preset *qpreset);
 264        int (*vidioc_s_dv_timings) (struct file *file, void *fh,
 265                                    struct v4l2_dv_timings *timings);
 266        int (*vidioc_g_dv_timings) (struct file *file, void *fh,
 267                                    struct v4l2_dv_timings *timings);
 268        int (*vidioc_query_dv_timings) (struct file *file, void *fh,
 269                                    struct v4l2_dv_timings *timings);
 270        int (*vidioc_enum_dv_timings) (struct file *file, void *fh,
 271                                    struct v4l2_enum_dv_timings *timings);
 272        int (*vidioc_dv_timings_cap) (struct file *file, void *fh,
 273                                    struct v4l2_dv_timings_cap *cap);
 274
 275        int (*vidioc_subscribe_event)  (struct v4l2_fh *fh,
 276                                        const struct v4l2_event_subscription *sub);
 277        int (*vidioc_unsubscribe_event)(struct v4l2_fh *fh,
 278                                        const struct v4l2_event_subscription *sub);
 279
 280        /* For other private ioctls */
 281        long (*vidioc_default)         (struct file *file, void *fh,
 282                                        bool valid_prio, int cmd, void *arg);
 283};
 284
 285
 286/* v4l debugging and diagnostics */
 287
 288/* Debug bitmask flags to be used on V4L2 */
 289#define V4L2_DEBUG_IOCTL     0x01
 290#define V4L2_DEBUG_IOCTL_ARG 0x02
 291
 292/*  Video standard functions  */
 293extern const char *v4l2_norm_to_name(v4l2_std_id id);
 294extern void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod);
 295extern int v4l2_video_std_construct(struct v4l2_standard *vs,
 296                                    int id, const char *name);
 297/* Prints the ioctl in a human-readable format. If prefix != NULL,
 298   then do printk(KERN_DEBUG "%s: ", prefix) first. */
 299extern void v4l_printk_ioctl(const char *prefix, unsigned int cmd);
 300
 301/* Internal use only: get the mutex (if any) that we need to lock for the
 302   given command. */
 303struct video_device;
 304extern struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd);
 305
 306/* names for fancy debug output */
 307extern const char *v4l2_field_names[];
 308extern const char *v4l2_type_names[];
 309
 310#ifdef CONFIG_COMPAT
 311/* 32 Bits compatibility layer for 64 bits processors */
 312extern long v4l2_compat_ioctl32(struct file *file, unsigned int cmd,
 313                                unsigned long arg);
 314#endif
 315
 316typedef long (*v4l2_kioctl)(struct file *file,
 317                unsigned int cmd, void *arg);
 318
 319/* Include support for obsoleted stuff */
 320extern long video_usercopy(struct file *file, unsigned int cmd,
 321                                unsigned long arg, v4l2_kioctl func);
 322
 323/* Standard handlers for V4L ioctl's */
 324extern long video_ioctl2(struct file *file,
 325                        unsigned int cmd, unsigned long arg);
 326
 327#endif /* _V4L2_IOCTL_H */
 328
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