V4L/DVB (8482): videodev: move all ioctl callbacks to a new v4l2_ioctl_ops struct

All ioctl callbacks are now stored in a new v4l2_ioctl_ops struct. Drivers fill in
a const struct v4l2_ioctl_ops and video_device just contains a const pointer to it.

This ensures a clean separation between the const ops struct and the non-const
video_device struct.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

2 files changed, 226 insertions, 219 deletions

diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index ad62d322e178..d9149cd25b31 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -39,6 +39,8 @@
 #define VFL_TYPE_RADIO		2
 #define VFL_TYPE_VTX		3
 
+struct v4l2_ioctl_callbacks;
+
 /*
  * Newer version of video_device, handled by videodev2.c
  * 	This version moves redundant code from video device code to
@@ -72,225 +74,7 @@ struct video_device
 	void (*release)(struct video_device *vfd);
 
 	/* ioctl callbacks */
-
-	/* VIDIOC_QUERYCAP handler */
-	int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
-
-	/* Priority handling */
-	int (*vidioc_g_priority)   (struct file *file, void *fh,
-				    enum v4l2_priority *p);
-	int (*vidioc_s_priority)   (struct file *file, void *fh,
-				    enum v4l2_priority p);
-
-	/* VIDIOC_ENUM_FMT handlers */
-	int (*vidioc_enum_fmt_vid_cap)     (struct file *file, void *fh,
-					    struct v4l2_fmtdesc *f);
-	int (*vidioc_enum_fmt_vid_overlay) (struct file *file, void *fh,
-					    struct v4l2_fmtdesc *f);
-	int (*vidioc_enum_fmt_vid_out)     (struct file *file, void *fh,
-					    struct v4l2_fmtdesc *f);
-#if 1
-	/* deprecated, will be removed in 2.6.28 */
-	int (*vidioc_enum_fmt_vbi_cap)     (struct file *file, void *fh,
-					    struct v4l2_fmtdesc *f);
-#endif
-	int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
-					    struct v4l2_fmtdesc *f);
-
-	/* VIDIOC_G_FMT handlers */
-	int (*vidioc_g_fmt_vid_cap)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_vid_overlay)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_vid_out)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_vid_out_overlay)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_vbi_cap)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_vbi_out)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_sliced_vbi_cap)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_sliced_vbi_out)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
-					struct v4l2_format *f);
-
-	/* VIDIOC_S_FMT handlers */
-	int (*vidioc_s_fmt_vid_cap)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_vid_overlay)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_vid_out)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_vid_out_overlay)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_vbi_cap)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_vbi_out)    (struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_sliced_vbi_cap)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_sliced_vbi_out)(struct file *file, void *fh,
-					struct v4l2_format *f);
-	int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
-					struct v4l2_format *f);
-
-	/* VIDIOC_TRY_FMT handlers */
-	int (*vidioc_try_fmt_vid_cap)    (struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_vid_overlay)(struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_vid_out)    (struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_vid_out_overlay)(struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_vbi_cap)    (struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_vbi_out)    (struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_sliced_vbi_cap)(struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_sliced_vbi_out)(struct file *file, void *fh,
-					  struct v4l2_format *f);
-	int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
-					  struct v4l2_format *f);
-
-	/* Buffer handlers */
-	int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
-	int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
-	int (*vidioc_qbuf)    (struct file *file, void *fh, struct v4l2_buffer *b);
-	int (*vidioc_dqbuf)   (struct file *file, void *fh, struct v4l2_buffer *b);
-
-
-	int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
-#ifdef CONFIG_VIDEO_V4L1_COMPAT
-			/* buffer type is struct vidio_mbuf * */
-	int (*vidiocgmbuf)  (struct file *file, void *fh, struct video_mbuf *p);
-#endif
-	int (*vidioc_g_fbuf)   (struct file *file, void *fh,
-				struct v4l2_framebuffer *a);
-	int (*vidioc_s_fbuf)   (struct file *file, void *fh,
-				struct v4l2_framebuffer *a);
-
-		/* Stream on/off */
-	int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
-	int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
-
-		/* Standard handling
-			ENUMSTD is handled by videodev.c
-		 */
-	int (*vidioc_g_std) (struct file *file, void *fh, v4l2_std_id *norm);
-	int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id *norm);
-	int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
-
-		/* Input handling */
-	int (*vidioc_enum_input)(struct file *file, void *fh,
-				 struct v4l2_input *inp);
-	int (*vidioc_g_input)   (struct file *file, void *fh, unsigned int *i);
-	int (*vidioc_s_input)   (struct file *file, void *fh, unsigned int i);
-
-		/* Output handling */
-	int (*vidioc_enum_output) (struct file *file, void *fh,
-				  struct v4l2_output *a);
-	int (*vidioc_g_output)   (struct file *file, void *fh, unsigned int *i);
-	int (*vidioc_s_output)   (struct file *file, void *fh, unsigned int i);
-
-		/* Control handling */
-	int (*vidioc_queryctrl)        (struct file *file, void *fh,
-					struct v4l2_queryctrl *a);
-	int (*vidioc_g_ctrl)           (struct file *file, void *fh,
-					struct v4l2_control *a);
-	int (*vidioc_s_ctrl)           (struct file *file, void *fh,
-					struct v4l2_control *a);
-	int (*vidioc_g_ext_ctrls)      (struct file *file, void *fh,
-					struct v4l2_ext_controls *a);
-	int (*vidioc_s_ext_ctrls)      (struct file *file, void *fh,
-					struct v4l2_ext_controls *a);
-	int (*vidioc_try_ext_ctrls)    (struct file *file, void *fh,
-					struct v4l2_ext_controls *a);
-	int (*vidioc_querymenu)        (struct file *file, void *fh,
-					struct v4l2_querymenu *a);
-
-	/* Audio ioctls */
-	int (*vidioc_enumaudio)        (struct file *file, void *fh,
-					struct v4l2_audio *a);
-	int (*vidioc_g_audio)          (struct file *file, void *fh,
-					struct v4l2_audio *a);
-	int (*vidioc_s_audio)          (struct file *file, void *fh,
-					struct v4l2_audio *a);
-
-	/* Audio out ioctls */
-	int (*vidioc_enumaudout)       (struct file *file, void *fh,
-					struct v4l2_audioout *a);
-	int (*vidioc_g_audout)         (struct file *file, void *fh,
-					struct v4l2_audioout *a);
-	int (*vidioc_s_audout)         (struct file *file, void *fh,
-					struct v4l2_audioout *a);
-	int (*vidioc_g_modulator)      (struct file *file, void *fh,
-					struct v4l2_modulator *a);
-	int (*vidioc_s_modulator)      (struct file *file, void *fh,
-					struct v4l2_modulator *a);
-	/* Crop ioctls */
-	int (*vidioc_cropcap)          (struct file *file, void *fh,
-					struct v4l2_cropcap *a);
-	int (*vidioc_g_crop)           (struct file *file, void *fh,
-					struct v4l2_crop *a);
-	int (*vidioc_s_crop)           (struct file *file, void *fh,
-					struct v4l2_crop *a);
-	/* Compression ioctls */
-	int (*vidioc_g_jpegcomp)       (struct file *file, void *fh,
-					struct v4l2_jpegcompression *a);
-	int (*vidioc_s_jpegcomp)       (struct file *file, void *fh,
-					struct v4l2_jpegcompression *a);
-	int (*vidioc_g_enc_index)      (struct file *file, void *fh,
-					struct v4l2_enc_idx *a);
-	int (*vidioc_encoder_cmd)      (struct file *file, void *fh,
-					struct v4l2_encoder_cmd *a);
-	int (*vidioc_try_encoder_cmd)  (struct file *file, void *fh,
-					struct v4l2_encoder_cmd *a);
-
-	/* Stream type-dependent parameter ioctls */
-	int (*vidioc_g_parm)           (struct file *file, void *fh,
-					struct v4l2_streamparm *a);
-	int (*vidioc_s_parm)           (struct file *file, void *fh,
-					struct v4l2_streamparm *a);
-
-	/* Tuner ioctls */
-	int (*vidioc_g_tuner)          (struct file *file, void *fh,
-					struct v4l2_tuner *a);
-	int (*vidioc_s_tuner)          (struct file *file, void *fh,
-					struct v4l2_tuner *a);
-	int (*vidioc_g_frequency)      (struct file *file, void *fh,
-					struct v4l2_frequency *a);
-	int (*vidioc_s_frequency)      (struct file *file, void *fh,
-					struct v4l2_frequency *a);
-
-	/* Sliced VBI cap */
-	int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
-					struct v4l2_sliced_vbi_cap *a);
-
-	/* Log status ioctl */
-	int (*vidioc_log_status)       (struct file *file, void *fh);
-
-	int (*vidioc_s_hw_freq_seek)   (struct file *file, void *fh,
-					struct v4l2_hw_freq_seek *a);
-
-	/* Debugging ioctls */
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-	int (*vidioc_g_register)       (struct file *file, void *fh,
-					struct v4l2_register *reg);
-	int (*vidioc_s_register)       (struct file *file, void *fh,
-					struct v4l2_register *reg);
-#endif
-	int (*vidioc_g_chip_ident)     (struct file *file, void *fh,
-					struct v4l2_chip_ident *chip);
-
-	/* For other private ioctls */
-	int (*vidioc_default)	       (struct file *file, void *fh,
-					int cmd, void *arg);
-
+	const struct v4l2_ioctl_ops *ioctl_ops;
 
 #ifdef OBSOLETE_OWNER /* to be removed soon */
 /* obsolete -- fops->owner is used instead */
diff --git a/include/media/v4l2-ioctl.h b/include/media/v4l2-ioctl.h
index e319d1fffb82..dc6404618555 100644
--- a/include/media/v4l2-ioctl.h
+++ b/include/media/v4l2-ioctl.h
@@ -20,6 +20,229 @@
 #include <linux/videodev2.h>
 #endif
 
+struct v4l2_ioctl_ops {
+	/* ioctl callbacks */
+
+	/* VIDIOC_QUERYCAP handler */
+	int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
+
+	/* Priority handling */
+	int (*vidioc_g_priority)   (struct file *file, void *fh,
+				    enum v4l2_priority *p);
+	int (*vidioc_s_priority)   (struct file *file, void *fh,
+				    enum v4l2_priority p);
+
+	/* VIDIOC_ENUM_FMT handlers */
+	int (*vidioc_enum_fmt_vid_cap)     (struct file *file, void *fh,
+					    struct v4l2_fmtdesc *f);
+	int (*vidioc_enum_fmt_vid_overlay) (struct file *file, void *fh,
+					    struct v4l2_fmtdesc *f);
+	int (*vidioc_enum_fmt_vid_out)     (struct file *file, void *fh,
+					    struct v4l2_fmtdesc *f);
+#if 1
+	/* deprecated, will be removed in 2.6.28 */
+	int (*vidioc_enum_fmt_vbi_cap)     (struct file *file, void *fh,
+					    struct v4l2_fmtdesc *f);
+#endif
+	int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
+					    struct v4l2_fmtdesc *f);
+
+	/* VIDIOC_G_FMT handlers */
+	int (*vidioc_g_fmt_vid_cap)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_vid_overlay)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_vid_out)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_vid_out_overlay)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_vbi_cap)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_vbi_out)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_sliced_vbi_cap)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_sliced_vbi_out)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
+					struct v4l2_format *f);
+
+	/* VIDIOC_S_FMT handlers */
+	int (*vidioc_s_fmt_vid_cap)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_vid_overlay)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_vid_out)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_vid_out_overlay)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_vbi_cap)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_vbi_out)    (struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_sliced_vbi_cap)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_sliced_vbi_out)(struct file *file, void *fh,
+					struct v4l2_format *f);
+	int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
+					struct v4l2_format *f);
+
+	/* VIDIOC_TRY_FMT handlers */
+	int (*vidioc_try_fmt_vid_cap)    (struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_vid_overlay)(struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_vid_out)    (struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_vid_out_overlay)(struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_vbi_cap)    (struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_vbi_out)    (struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_sliced_vbi_cap)(struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_sliced_vbi_out)(struct file *file, void *fh,
+					  struct v4l2_format *f);
+	int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
+					  struct v4l2_format *f);
+
+	/* Buffer handlers */
+	int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
+	int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
+	int (*vidioc_qbuf)    (struct file *file, void *fh, struct v4l2_buffer *b);
+	int (*vidioc_dqbuf)   (struct file *file, void *fh, struct v4l2_buffer *b);
+
+
+	int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+			/* buffer type is struct vidio_mbuf * */
+	int (*vidiocgmbuf)  (struct file *file, void *fh, struct video_mbuf *p);
+#endif
+	int (*vidioc_g_fbuf)   (struct file *file, void *fh,
+				struct v4l2_framebuffer *a);
+	int (*vidioc_s_fbuf)   (struct file *file, void *fh,
+				struct v4l2_framebuffer *a);
+
+		/* Stream on/off */
+	int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
+	int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
+
+		/* Standard handling
+			ENUMSTD is handled by videodev.c
+		 */
+	int (*vidioc_g_std) (struct file *file, void *fh, v4l2_std_id *norm);
+	int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id *norm);
+	int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
+
+		/* Input handling */
+	int (*vidioc_enum_input)(struct file *file, void *fh,
+				 struct v4l2_input *inp);
+	int (*vidioc_g_input)   (struct file *file, void *fh, unsigned int *i);
+	int (*vidioc_s_input)   (struct file *file, void *fh, unsigned int i);
+
+		/* Output handling */
+	int (*vidioc_enum_output) (struct file *file, void *fh,
+				  struct v4l2_output *a);
+	int (*vidioc_g_output)   (struct file *file, void *fh, unsigned int *i);
+	int (*vidioc_s_output)   (struct file *file, void *fh, unsigned int i);
+
+		/* Control handling */
+	int (*vidioc_queryctrl)        (struct file *file, void *fh,
+					struct v4l2_queryctrl *a);
+	int (*vidioc_g_ctrl)           (struct file *file, void *fh,
+					struct v4l2_control *a);
+	int (*vidioc_s_ctrl)           (struct file *file, void *fh,
+					struct v4l2_control *a);
+	int (*vidioc_g_ext_ctrls)      (struct file *file, void *fh,
+					struct v4l2_ext_controls *a);
+	int (*vidioc_s_ext_ctrls)      (struct file *file, void *fh,
+					struct v4l2_ext_controls *a);
+	int (*vidioc_try_ext_ctrls)    (struct file *file, void *fh,
+					struct v4l2_ext_controls *a);
+	int (*vidioc_querymenu)        (struct file *file, void *fh,
+					struct v4l2_querymenu *a);
+
+	/* Audio ioctls */
+	int (*vidioc_enumaudio)        (struct file *file, void *fh,
+					struct v4l2_audio *a);
+	int (*vidioc_g_audio)          (struct file *file, void *fh,
+					struct v4l2_audio *a);
+	int (*vidioc_s_audio)          (struct file *file, void *fh,
+					struct v4l2_audio *a);
+
+	/* Audio out ioctls */
+	int (*vidioc_enumaudout)       (struct file *file, void *fh,
+					struct v4l2_audioout *a);
+	int (*vidioc_g_audout)         (struct file *file, void *fh,
+					struct v4l2_audioout *a);
+	int (*vidioc_s_audout)         (struct file *file, void *fh,
+					struct v4l2_audioout *a);
+	int (*vidioc_g_modulator)      (struct file *file, void *fh,
+					struct v4l2_modulator *a);
+	int (*vidioc_s_modulator)      (struct file *file, void *fh,
+					struct v4l2_modulator *a);
+	/* Crop ioctls */
+	int (*vidioc_cropcap)          (struct file *file, void *fh,
+					struct v4l2_cropcap *a);
+	int (*vidioc_g_crop)           (struct file *file, void *fh,
+					struct v4l2_crop *a);
+	int (*vidioc_s_crop)           (struct file *file, void *fh,
+					struct v4l2_crop *a);
+	/* Compression ioctls */
+	int (*vidioc_g_jpegcomp)       (struct file *file, void *fh,
+					struct v4l2_jpegcompression *a);
+	int (*vidioc_s_jpegcomp)       (struct file *file, void *fh,
+					struct v4l2_jpegcompression *a);
+	int (*vidioc_g_enc_index)      (struct file *file, void *fh,
+					struct v4l2_enc_idx *a);
+	int (*vidioc_encoder_cmd)      (struct file *file, void *fh,
+					struct v4l2_encoder_cmd *a);
+	int (*vidioc_try_encoder_cmd)  (struct file *file, void *fh,
+					struct v4l2_encoder_cmd *a);
+
+	/* Stream type-dependent parameter ioctls */
+	int (*vidioc_g_parm)           (struct file *file, void *fh,
+					struct v4l2_streamparm *a);
+	int (*vidioc_s_parm)           (struct file *file, void *fh,
+					struct v4l2_streamparm *a);
+
+	/* Tuner ioctls */
+	int (*vidioc_g_tuner)          (struct file *file, void *fh,
+					struct v4l2_tuner *a);
+	int (*vidioc_s_tuner)          (struct file *file, void *fh,
+					struct v4l2_tuner *a);
+	int (*vidioc_g_frequency)      (struct file *file, void *fh,
+					struct v4l2_frequency *a);
+	int (*vidioc_s_frequency)      (struct file *file, void *fh,
+					struct v4l2_frequency *a);
+
+	/* Sliced VBI cap */
+	int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
+					struct v4l2_sliced_vbi_cap *a);
+
+	/* Log status ioctl */
+	int (*vidioc_log_status)       (struct file *file, void *fh);
+
+	int (*vidioc_s_hw_freq_seek)   (struct file *file, void *fh,
+					struct v4l2_hw_freq_seek *a);
+
+	/* Debugging ioctls */
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	int (*vidioc_g_register)       (struct file *file, void *fh,
+					struct v4l2_register *reg);
+	int (*vidioc_s_register)       (struct file *file, void *fh,
+					struct v4l2_register *reg);
+#endif
+	int (*vidioc_g_chip_ident)     (struct file *file, void *fh,
+					struct v4l2_chip_ident *chip);
+
+	/* For other private ioctls */
+	int (*vidioc_default)	       (struct file *file, void *fh,
+					int cmd, void *arg);
+};
+
+
 /* v4l debugging and diagnostics */
 
 /* Debug bitmask flags to be used on V4L2 */