/* SPDX-License-Identifier: GPL-2.0 */ /* * * V 4 L 2 D R I V E R H E L P E R A P I * * Moved from videodev2.h * * Some commonly needed functions for drivers (v4l2-common.o module) */ #ifndef _V4L2_IOCTL_H #define _V4L2_IOCTL_H #include <linux/poll.h> #include <linux/fs.h> #include <linux/mutex.h> #include <linux/sched/signal.h> #include <linux/compiler.h> /* need __user */ #include <linux/videodev2.h> struct v4l2_fh; /** * struct v4l2_ioctl_ops - describe operations for each V4L2 ioctl * * @vidioc_querycap: pointer to the function that implements * :ref:`VIDIOC_QUERYCAP <vidioc_querycap>` ioctl * @vidioc_enum_fmt_vid_cap: pointer to the function that implements * :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic * for video capture in single and multi plane mode * @vidioc_enum_fmt_vid_overlay: pointer to the function that implements * :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic * for video overlay * @vidioc_enum_fmt_vid_out: pointer to the function that implements * :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic * for video output in single and multi plane mode * @vidioc_enum_fmt_sdr_cap: pointer to the function that implements * :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic * for Software Defined Radio capture * @vidioc_enum_fmt_sdr_out: pointer to the function that implements * :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic * for Software Defined Radio output * @vidioc_enum_fmt_meta_cap: pointer to the function that implements * :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic * for metadata capture * @vidioc_enum_fmt_meta_out: pointer to the function that implements * :ref:`VIDIOC_ENUM_FMT <vidioc_enum_fmt>` ioctl logic * for metadata output * @vidioc_g_fmt_vid_cap: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video capture * in single plane mode * @vidioc_g_fmt_vid_overlay: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay * @vidioc_g_fmt_vid_out: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video out * in single plane mode * @vidioc_g_fmt_vid_out_overlay: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video overlay output * @vidioc_g_fmt_vbi_cap: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture * @vidioc_g_fmt_vbi_out: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output * @vidioc_g_fmt_sliced_vbi_cap: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI capture * @vidioc_g_fmt_sliced_vbi_out: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output * @vidioc_g_fmt_vid_cap_mplane: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video capture * in multiple plane mode * @vidioc_g_fmt_vid_out_mplane: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for video out * in multiplane plane mode * @vidioc_g_fmt_sdr_cap: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for Software Defined * Radio capture * @vidioc_g_fmt_sdr_out: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for Software Defined * Radio output * @vidioc_g_fmt_meta_cap: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for metadata capture * @vidioc_g_fmt_meta_out: pointer to the function that implements * :ref:`VIDIOC_G_FMT <vidioc_g_fmt>` ioctl logic for metadata output * @vidioc_s_fmt_vid_cap: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video capture * in single plane mode * @vidioc_s_fmt_vid_overlay: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay * @vidioc_s_fmt_vid_out: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video out * in single plane mode * @vidioc_s_fmt_vid_out_overlay: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video overlay output * @vidioc_s_fmt_vbi_cap: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture * @vidioc_s_fmt_vbi_out: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output * @vidioc_s_fmt_sliced_vbi_cap: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI capture * @vidioc_s_fmt_sliced_vbi_out: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output * @vidioc_s_fmt_vid_cap_mplane: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video capture * in multiple plane mode * @vidioc_s_fmt_vid_out_mplane: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for video out * in multiplane plane mode * @vidioc_s_fmt_sdr_cap: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for Software Defined * Radio capture * @vidioc_s_fmt_sdr_out: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for Software Defined * Radio output * @vidioc_s_fmt_meta_cap: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for metadata capture * @vidioc_s_fmt_meta_out: pointer to the function that implements * :ref:`VIDIOC_S_FMT <vidioc_g_fmt>` ioctl logic for metadata output * @vidioc_try_fmt_vid_cap: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video capture * in single plane mode * @vidioc_try_fmt_vid_overlay: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay * @vidioc_try_fmt_vid_out: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video out * in single plane mode * @vidioc_try_fmt_vid_out_overlay: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video overlay * output * @vidioc_try_fmt_vbi_cap: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for raw VBI capture * @vidioc_try_fmt_vbi_out: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for raw VBI output * @vidioc_try_fmt_sliced_vbi_cap: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI * capture * @vidioc_try_fmt_sliced_vbi_out: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for sliced VBI output * @vidioc_try_fmt_vid_cap_mplane: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video capture * in multiple plane mode * @vidioc_try_fmt_vid_out_mplane: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for video out * in multiplane plane mode * @vidioc_try_fmt_sdr_cap: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for Software Defined * Radio capture * @vidioc_try_fmt_sdr_out: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for Software Defined * Radio output * @vidioc_try_fmt_meta_cap: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for metadata capture * @vidioc_try_fmt_meta_out: pointer to the function that implements * :ref:`VIDIOC_TRY_FMT <vidioc_g_fmt>` ioctl logic for metadata output * @vidioc_reqbufs: pointer to the function that implements * :ref:`VIDIOC_REQBUFS <vidioc_reqbufs>` ioctl * @vidioc_querybuf: pointer to the function that implements * :ref:`VIDIOC_QUERYBUF <vidioc_querybuf>` ioctl * @vidioc_qbuf: pointer to the function that implements * :ref:`VIDIOC_QBUF <vidioc_qbuf>` ioctl * @vidioc_expbuf: pointer to the function that implements * :ref:`VIDIOC_EXPBUF <vidioc_expbuf>` ioctl * @vidioc_dqbuf: pointer to the function that implements * :ref:`VIDIOC_DQBUF <vidioc_qbuf>` ioctl * @vidioc_create_bufs: pointer to the function that implements * :ref:`VIDIOC_CREATE_BUFS <vidioc_create_bufs>` ioctl * @vidioc_prepare_buf: pointer to the function that implements * :ref:`VIDIOC_PREPARE_BUF <vidioc_prepare_buf>` ioctl * @vidioc_remove_bufs: pointer to the function that implements * :ref:`VIDIOC_REMOVE_BUFS <vidioc_remove_bufs>` ioctl * @vidioc_overlay: pointer to the function that implements * :ref:`VIDIOC_OVERLAY <vidioc_overlay>` ioctl * @vidioc_g_fbuf: pointer to the function that implements * :ref:`VIDIOC_G_FBUF <vidioc_g_fbuf>` ioctl * @vidioc_s_fbuf: pointer to the function that implements * :ref:`VIDIOC_S_FBUF <vidioc_g_fbuf>` ioctl * @vidioc_streamon: pointer to the function that implements * :ref:`VIDIOC_STREAMON <vidioc_streamon>` ioctl * @vidioc_streamoff: pointer to the function that implements * :ref:`VIDIOC_STREAMOFF <vidioc_streamon>` ioctl * @vidioc_g_std: pointer to the function that implements * :ref:`VIDIOC_G_STD <vidioc_g_std>` ioctl * @vidioc_s_std: pointer to the function that implements * :ref:`VIDIOC_S_STD <vidioc_g_std>` ioctl * @vidioc_querystd: pointer to the function that implements * :ref:`VIDIOC_QUERYSTD <vidioc_querystd>` ioctl * @vidioc_enum_input: pointer to the function that implements * :ref:`VIDIOC_ENUM_INPUT <vidioc_g_input>` ioctl * @vidioc_g_input: pointer to the function that implements * :ref:`VIDIOC_G_INPUT <vidioc_g_input>` ioctl * @vidioc_s_input: pointer to the function that implements * :ref:`VIDIOC_S_INPUT <vidioc_g_input>` ioctl * @vidioc_enum_output: pointer to the function that implements * :ref:`VIDIOC_ENUM_OUTPUT <vidioc_g_output>` ioctl * @vidioc_g_output: pointer to the function that implements * :ref:`VIDIOC_G_OUTPUT <vidioc_g_output>` ioctl * @vidioc_s_output: pointer to the function that implements * :ref:`VIDIOC_S_OUTPUT <vidioc_g_output>` ioctl * @vidioc_queryctrl: pointer to the function that implements * :ref:`VIDIOC_QUERYCTRL <vidioc_queryctrl>` ioctl * @vidioc_query_ext_ctrl: pointer to the function that implements * :ref:`VIDIOC_QUERY_EXT_CTRL <vidioc_queryctrl>` ioctl * @vidioc_g_ctrl: pointer to the function that implements * :ref:`VIDIOC_G_CTRL <vidioc_g_ctrl>` ioctl * @vidioc_s_ctrl: pointer to the function that implements * :ref:`VIDIOC_S_CTRL <vidioc_g_ctrl>` ioctl * @vidioc_g_ext_ctrls: pointer to the function that implements * :ref:`VIDIOC_G_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl * @vidioc_s_ext_ctrls: pointer to the function that implements * :ref:`VIDIOC_S_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl * @vidioc_try_ext_ctrls: pointer to the function that implements * :ref:`VIDIOC_TRY_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl * @vidioc_querymenu: pointer to the function that implements * :ref:`VIDIOC_QUERYMENU <vidioc_queryctrl>` ioctl * @vidioc_enumaudio: pointer to the function that implements * :ref:`VIDIOC_ENUMAUDIO <vidioc_enumaudio>` ioctl * @vidioc_g_audio: pointer to the function that implements * :ref:`VIDIOC_G_AUDIO <vidioc_g_audio>` ioctl * @vidioc_s_audio: pointer to the function that implements * :ref:`VIDIOC_S_AUDIO <vidioc_g_audio>` ioctl * @vidioc_enumaudout: pointer to the function that implements * :ref:`VIDIOC_ENUMAUDOUT <vidioc_enumaudout>` ioctl * @vidioc_g_audout: pointer to the function that implements * :ref:`VIDIOC_G_AUDOUT <vidioc_g_audout>` ioctl * @vidioc_s_audout: pointer to the function that implements * :ref:`VIDIOC_S_AUDOUT <vidioc_g_audout>` ioctl * @vidioc_g_modulator: pointer to the function that implements * :ref:`VIDIOC_G_MODULATOR <vidioc_g_modulator>` ioctl * @vidioc_s_modulator: pointer to the function that implements * :ref:`VIDIOC_S_MODULATOR <vidioc_g_modulator>` ioctl * @vidioc_g_pixelaspect: pointer to the function that implements * the pixelaspect part of the :ref:`VIDIOC_CROPCAP <vidioc_cropcap>` ioctl * @vidioc_g_selection: pointer to the function that implements * :ref:`VIDIOC_G_SELECTION <vidioc_g_selection>` ioctl * @vidioc_s_selection: pointer to the function that implements * :ref:`VIDIOC_S_SELECTION <vidioc_g_selection>` ioctl * @vidioc_g_jpegcomp: pointer to the function that implements * :ref:`VIDIOC_G_JPEGCOMP <vidioc_g_jpegcomp>` ioctl * @vidioc_s_jpegcomp: pointer to the function that implements * :ref:`VIDIOC_S_JPEGCOMP <vidioc_g_jpegcomp>` ioctl * @vidioc_g_enc_index: pointer to the function that implements * :ref:`VIDIOC_G_ENC_INDEX <vidioc_g_enc_index>` ioctl * @vidioc_encoder_cmd: pointer to the function that implements * :ref:`VIDIOC_ENCODER_CMD <vidioc_encoder_cmd>` ioctl * @vidioc_try_encoder_cmd: pointer to the function that implements * :ref:`VIDIOC_TRY_ENCODER_CMD <vidioc_encoder_cmd>` ioctl * @vidioc_decoder_cmd: pointer to the function that implements * :ref:`VIDIOC_DECODER_CMD <vidioc_decoder_cmd>` ioctl * @vidioc_try_decoder_cmd: pointer to the function that implements * :ref:`VIDIOC_TRY_DECODER_CMD <vidioc_decoder_cmd>` ioctl * @vidioc_g_parm: pointer to the function that implements * :ref:`VIDIOC_G_PARM <vidioc_g_parm>` ioctl * @vidioc_s_parm: pointer to the function that implements * :ref:`VIDIOC_S_PARM <vidioc_g_parm>` ioctl * @vidioc_g_tuner: pointer to the function that implements * :ref:`VIDIOC_G_TUNER <vidioc_g_tuner>` ioctl * @vidioc_s_tuner: pointer to the function that implements * :ref:`VIDIOC_S_TUNER <vidioc_g_tuner>` ioctl * @vidioc_g_frequency: pointer to the function that implements * :ref:`VIDIOC_G_FREQUENCY <vidioc_g_frequency>` ioctl * @vidioc_s_frequency: pointer to the function that implements * :ref:`VIDIOC_S_FREQUENCY <vidioc_g_frequency>` ioctl * @vidioc_enum_freq_bands: pointer to the function that implements * :ref:`VIDIOC_ENUM_FREQ_BANDS <vidioc_enum_freq_bands>` ioctl * @vidioc_g_sliced_vbi_cap: pointer to the function that implements * :ref:`VIDIOC_G_SLICED_VBI_CAP <vidioc_g_sliced_vbi_cap>` ioctl * @vidioc_log_status: pointer to the function that implements * :ref:`VIDIOC_LOG_STATUS <vidioc_log_status>` ioctl * @vidioc_s_hw_freq_seek: pointer to the function that implements * :ref:`VIDIOC_S_HW_FREQ_SEEK <vidioc_s_hw_freq_seek>` ioctl * @vidioc_g_register: pointer to the function that implements * :ref:`VIDIOC_DBG_G_REGISTER <vidioc_dbg_g_register>` ioctl * @vidioc_s_register: pointer to the function that implements * :ref:`VIDIOC_DBG_S_REGISTER <vidioc_dbg_g_register>` ioctl * @vidioc_g_chip_info: pointer to the function that implements * :ref:`VIDIOC_DBG_G_CHIP_INFO <vidioc_dbg_g_chip_info>` ioctl * @vidioc_enum_framesizes: pointer to the function that implements * :ref:`VIDIOC_ENUM_FRAMESIZES <vidioc_enum_framesizes>` ioctl * @vidioc_enum_frameintervals: pointer to the function that implements * :ref:`VIDIOC_ENUM_FRAMEINTERVALS <vidioc_enum_frameintervals>` ioctl * @vidioc_s_dv_timings: pointer to the function that implements * :ref:`VIDIOC_S_DV_TIMINGS <vidioc_g_dv_timings>` ioctl * @vidioc_g_dv_timings: pointer to the function that implements * :ref:`VIDIOC_G_DV_TIMINGS <vidioc_g_dv_timings>` ioctl * @vidioc_query_dv_timings: pointer to the function that implements * :ref:`VIDIOC_QUERY_DV_TIMINGS <vidioc_query_dv_timings>` ioctl * @vidioc_enum_dv_timings: pointer to the function that implements * :ref:`VIDIOC_ENUM_DV_TIMINGS <vidioc_enum_dv_timings>` ioctl * @vidioc_dv_timings_cap: pointer to the function that implements * :ref:`VIDIOC_DV_TIMINGS_CAP <vidioc_dv_timings_cap>` ioctl * @vidioc_g_edid: pointer to the function that implements * :ref:`VIDIOC_G_EDID <vidioc_g_edid>` ioctl * @vidioc_s_edid: pointer to the function that implements * :ref:`VIDIOC_S_EDID <vidioc_g_edid>` ioctl * @vidioc_subscribe_event: pointer to the function that implements * :ref:`VIDIOC_SUBSCRIBE_EVENT <vidioc_subscribe_event>` ioctl * @vidioc_unsubscribe_event: pointer to the function that implements * :ref:`VIDIOC_UNSUBSCRIBE_EVENT <vidioc_unsubscribe_event>` ioctl * @vidioc_default: pointed used to allow other ioctls */ struct v4l2_ioctl_ops { … }; /* v4l debugging and diagnostics */ /* Device debug flags to be used with the video device debug attribute */ /* Just log the ioctl name + error code */ #define V4L2_DEV_DEBUG_IOCTL … /* Log the ioctl name arguments + error code */ #define V4L2_DEV_DEBUG_IOCTL_ARG … /* Log the file operations open, release, mmap and get_unmapped_area */ #define V4L2_DEV_DEBUG_FOP … /* Log the read and write file operations and the VIDIOC_(D)QBUF ioctls */ #define V4L2_DEV_DEBUG_STREAMING … /* Log poll() */ #define V4L2_DEV_DEBUG_POLL … /* Log controls */ #define V4L2_DEV_DEBUG_CTRL … /* Video standard functions */ /** * v4l2_norm_to_name - Ancillary routine to analog TV standard name from its ID. * * @id: analog TV standard ID. * * Return: returns a string with the name of the analog TV standard. * If the standard is not found or if @id points to multiple standard, * it returns "Unknown". */ const char *v4l2_norm_to_name(v4l2_std_id id); /** * v4l2_video_std_frame_period - Ancillary routine that fills a * struct &v4l2_fract pointer with the default framerate fraction. * * @id: analog TV standard ID. * @frameperiod: struct &v4l2_fract pointer to be filled * */ void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod); /** * v4l2_video_std_construct - Ancillary routine that fills in the fields of * a &v4l2_standard structure according to the @id parameter. * * @vs: struct &v4l2_standard pointer to be filled * @id: analog TV standard ID. * @name: name of the standard to be used * * .. note:: * * This ancillary routine is obsolete. Shouldn't be used on newer drivers. */ int v4l2_video_std_construct(struct v4l2_standard *vs, int id, const char *name); /** * v4l_video_std_enumstd - Ancillary routine that fills in the fields of * a &v4l2_standard structure according to the @id and @vs->index * parameters. * * @vs: struct &v4l2_standard pointer to be filled. * @id: analog TV standard ID. * */ int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id); /** * v4l_printk_ioctl - Ancillary routine that prints the ioctl in a * human-readable format. * * @prefix: prefix to be added at the ioctl prints. * @cmd: ioctl name * * .. note:: * * If prefix != %NULL, then it will issue a * ``printk(KERN_DEBUG "%s: ", prefix)`` first. */ void v4l_printk_ioctl(const char *prefix, unsigned int cmd); struct video_device; /* names for fancy debug output */ extern const char *v4l2_field_names[]; extern const char *v4l2_type_names[]; #ifdef CONFIG_COMPAT /** * v4l2_compat_ioctl32 -32 Bits compatibility layer for 64 bits processors * * @file: Pointer to struct &file. * @cmd: Ioctl name. * @arg: Ioctl argument. */ long int v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg); #endif unsigned int v4l2_compat_translate_cmd(unsigned int cmd); int v4l2_compat_get_user(void __user *arg, void *parg, unsigned int cmd); int v4l2_compat_put_user(void __user *arg, void *parg, unsigned int cmd); int v4l2_compat_get_array_args(struct file *file, void *mbuf, void __user *user_ptr, size_t array_size, unsigned int cmd, void *arg); int v4l2_compat_put_array_args(struct file *file, void __user *user_ptr, void *mbuf, size_t array_size, unsigned int cmd, void *arg); /** * typedef v4l2_kioctl - Typedef used to pass an ioctl handler. * * @file: Pointer to struct &file. * @cmd: Ioctl name. * @arg: Ioctl argument. */ v4l2_kioctl; /** * video_usercopy - copies data from/to userspace memory when an ioctl is * issued. * * @file: Pointer to struct &file. * @cmd: Ioctl name. * @arg: Ioctl argument. * @func: function that will handle the ioctl * * .. note:: * * This routine should be used only inside the V4L2 core. */ long int video_usercopy(struct file *file, unsigned int cmd, unsigned long int arg, v4l2_kioctl func); /** * video_ioctl2 - Handles a V4L2 ioctl. * * @file: Pointer to struct &file. * @cmd: Ioctl name. * @arg: Ioctl argument. * * Method used to hancle an ioctl. Should be used to fill the * &v4l2_ioctl_ops.unlocked_ioctl on all V4L2 drivers. */ long int video_ioctl2(struct file *file, unsigned int cmd, unsigned long int arg); /* * The user space interpretation of the 'v4l2_event' differs * based on the 'time_t' definition on 32-bit architectures, so * the kernel has to handle both. * This is the old version for 32-bit architectures. */ struct v4l2_event_time32 { … }; #define VIDIOC_DQEVENT_TIME32 … struct v4l2_buffer_time32 { … }; #define VIDIOC_QUERYBUF_TIME32 … #define VIDIOC_QBUF_TIME32 … #define VIDIOC_DQBUF_TIME32 … #define VIDIOC_PREPARE_BUF_TIME32 … #endif /* _V4L2_IOCTL_H */
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