[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / media / v4l2-dev.h

/*
 *
 *	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_DEV_H
#define _V4L2_DEV_H

#define OBSOLETE_DEVDATA 1 /* to be removed soon */

#include <linux/poll.h>
#include <linux/fs.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/compiler.h> /* need __user */
#include <linux/videodev2.h>

#define VIDEO_MAJOR	81
/* Minor device allocation */
#define MINOR_VFL_TYPE_GRABBER_MIN   0
#define MINOR_VFL_TYPE_GRABBER_MAX  63
#define MINOR_VFL_TYPE_RADIO_MIN    64
#define MINOR_VFL_TYPE_RADIO_MAX   127
#define MINOR_VFL_TYPE_VTX_MIN     192
#define MINOR_VFL_TYPE_VTX_MAX     223
#define MINOR_VFL_TYPE_VBI_MIN     224
#define MINOR_VFL_TYPE_VBI_MAX     255

#define VFL_TYPE_GRABBER	0
#define VFL_TYPE_VBI		1
#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
 *	the common handler
 */

struct video_device
{
	/* device ops */
	const struct file_operations *fops;

	/* sysfs */
	struct device dev;		/* v4l device */
	struct device *parent;		/* device parent */

	/* device info */
	char name[32];
	int vfl_type;
	int minor;
	/* attribute to differentiate multiple indices on one physical device */
	int index;

	int debug;			/* Activates debug level*/

	/* Video standard vars */
	v4l2_std_id tvnorms;		/* Supported tv norms */
	v4l2_std_id current_norm;	/* Current tvnorm */

	/* callbacks */
	void (*release)(struct video_device *vfd);

	/* ioctl callbacks */
	const struct v4l2_ioctl_ops *ioctl_ops;

#ifdef OBSOLETE_DEVDATA /* to be removed soon */
	/* dev->driver_data will be used instead some day.
	 * Use the video_{get|set}_drvdata() helper functions,
	 * so the switch over will be transparent for you.
	 * Or use {pci|usb}_{get|set}_drvdata() directly. */
	void *priv;
#endif
};

/* Class-dev to video-device */
#define to_video_device(cd) container_of(cd, struct video_device, dev)

/* Version 2 functions */
extern int video_register_device(struct video_device *vfd, int type, int nr);
int video_register_device_index(struct video_device *vfd, int type, int nr,
					int index);
void video_unregister_device(struct video_device *);

/* helper functions to alloc / release struct video_device, the
   later can be used for video_device->release() */
struct video_device *video_device_alloc(void);
/* this release function frees the vfd pointer */
void video_device_release(struct video_device *vfd);
/* this release function does nothing, use when the video_device is a
   static global struct. Note that having a static video_device is
   a dubious construction at best. */
void video_device_release_empty(struct video_device *vfd);

#ifdef OBSOLETE_DEVDATA /* to be removed soon */
/* helper functions to access driver private data. */
static inline void *video_get_drvdata(struct video_device *dev)
{
	return dev->priv;
}

static inline void video_set_drvdata(struct video_device *dev, void *data)
{
	dev->priv = data;
}

/* Obsolete stuff - Still needed for radio devices and obsolete drivers */
extern struct video_device* video_devdata(struct file*);
#endif

#endif /* _V4L2_DEV_H */
Commit	Line	Data
401998fa MCC	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_DEV_H
	10	#define _V4L2_DEV_H
	11
38ee04f0	12	#define OBSOLETE_DEVDATA 1 /* to be removed soon */
401998fa MCC	13
	14	#include <linux/poll.h>
	15	#include <linux/fs.h>
	16	#include <linux/device.h>
	17	#include <linux/mutex.h>
	18	#include <linux/compiler.h> /* need __user */
401998fa	19	#include <linux/videodev2.h>
401998fa	20
401998fa MCC	21	#define VIDEO_MAJOR 81
	22	/* Minor device allocation */
	23	#define MINOR_VFL_TYPE_GRABBER_MIN 0
	24	#define MINOR_VFL_TYPE_GRABBER_MAX 63
	25	#define MINOR_VFL_TYPE_RADIO_MIN 64
	26	#define MINOR_VFL_TYPE_RADIO_MAX 127
	27	#define MINOR_VFL_TYPE_VTX_MIN 192
	28	#define MINOR_VFL_TYPE_VTX_MAX 223
	29	#define MINOR_VFL_TYPE_VBI_MIN 224
	30	#define MINOR_VFL_TYPE_VBI_MAX 255
	31
	32	#define VFL_TYPE_GRABBER 0
	33	#define VFL_TYPE_VBI 1
	34	#define VFL_TYPE_RADIO 2
	35	#define VFL_TYPE_VTX 3
	36
a399810c HV	37	struct v4l2_ioctl_callbacks;
a399810c HV	38
401998fa MCC	39	/*
	40	* Newer version of video_device, handled by videodev2.c
	41	* This version moves redundant code from video device code to
	42	* the common handler
	43	*/
401998fa MCC	44
	45	struct video_device
	46	{
	47	/* device ops */
5e87efa3	48	const struct file_operations *fops;
401998fa	49
54bd5b66	50	/* sysfs */
22a04f10	51	struct device dev; /* v4l device */
5e85e732	52	struct device parent; / device parent */
54bd5b66	53
401998fa	54	/* device info */
401998fa	55	char name[32];
0ea6bc8d	56	int vfl_type;
401998fa	57	int minor;
de1e575d	58	/* attribute to differentiate multiple indices on one physical device */
539a7555	59	int index;
401998fa	60
22a04f10	61	int debug; /* Activates debug level*/
401998fa MCC	62
401998fa MCC	63	/* Video standard vars */
e75f9cee MCC	64	v4l2_std_id tvnorms; /* Supported tv norms */
e75f9cee MCC	65	v4l2_std_id current_norm; /* Current tvnorm */
401998fa MCC	66
	67	/* callbacks */
	68	void (release)(struct video_device vfd);
	69
	70	/* ioctl callbacks */
a399810c	71	const struct v4l2_ioctl_ops *ioctl_ops;
dbbff48f	72
9c39d7ea HV	73	#ifdef OBSOLETE_DEVDATA /* to be removed soon */
	74	/* dev->driver_data will be used instead some day.
	75	* Use the video_{get\|set}_drvdata() helper functions,
	76	* so the switch over will be transparent for you.
	77	* Or use {pci\|usb}_{get\|set}_drvdata() directly. */
	78	void *priv;
401998fa	79	#endif
401998fa MCC	80	};
401998fa MCC	81
e90ff923	82	/* Class-dev to video-device */
22a04f10	83	#define to_video_device(cd) container_of(cd, struct video_device, dev)
e90ff923	84
401998fa MCC	85	/* Version 2 functions */
401998fa MCC	86	extern int video_register_device(struct video_device *vfd, int type, int nr);
539a7555	87	int video_register_device_index(struct video_device *vfd, int type, int nr,
539a7555	88	int index);
401998fa	89	void video_unregister_device(struct video_device *);
401998fa MCC	90
	91	/* helper functions to alloc / release struct video_device, the
	92	later can be used for video_device->release() */
	93	struct video_device *video_device_alloc(void);
f9e86b5e	94	/* this release function frees the vfd pointer */
401998fa	95	void video_device_release(struct video_device *vfd);
f9e86b5e HV	96	/* this release function does nothing, use when the video_device is a
	97	static global struct. Note that having a static video_device is
	98	a dubious construction at best. */
	99	void video_device_release_empty(struct video_device *vfd);
401998fa	100
9c39d7ea	101	#ifdef OBSOLETE_DEVDATA /* to be removed soon */
401998fa MCC	102	/* helper functions to access driver private data. */
	103	static inline void video_get_drvdata(struct video_device dev)
	104	{
	105	return dev->priv;
	106	}
	107
	108	static inline void video_set_drvdata(struct video_device dev, void data)
	109	{
	110	dev->priv = data;
	111	}
38ee04f0	112
38ee04f0 MCC	113	/* Obsolete stuff - Still needed for radio devices and obsolete drivers */
38ee04f0 MCC	114	extern struct video_device* video_devdata(struct file*);
38ee04f0	115	#endif
401998fa MCC	116
401998fa MCC	117	#endif /* _V4L2_DEV_H */