V4L/DVB (12176): davinci/vpif_display: Add VPIF display driver

/*

 * DM646x display header file

 *

 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/

 *

 * 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 version 2.

 *

 * This program is distributed .as is. WITHOUT ANY WARRANTY of any

 * kind, whether express or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#ifndef DAVINCIHD_DISPLAY_H

#define DAVINCIHD_DISPLAY_H

/* Header files */

#include <linux/videodev2.h>

#include <linux/version.h>

#include <media/v4l2-common.h>

#include <media/v4l2-device.h>

#include <media/videobuf-core.h>

#include <media/videobuf-dma-contig.h>

#include "vpif.h"

/* Macros */

#define VPIF_MAJOR_RELEASE	(0)

#define VPIF_MINOR_RELEASE	(0)

#define VPIF_BUILD		(1)

#define VPIF_DISPLAY_VERSION_CODE \

	((VPIF_MAJOR_RELEASE << 16) | (VPIF_MINOR_RELEASE << 8) | VPIF_BUILD)

#define VPIF_VALID_FIELD(field) \

	(((V4L2_FIELD_ANY == field) || (V4L2_FIELD_NONE == field)) || \

	(((V4L2_FIELD_INTERLACED == field) || (V4L2_FIELD_SEQ_TB == field)) || \

	(V4L2_FIELD_SEQ_BT == field)))

#define VPIF_DISPLAY_MAX_DEVICES	(2)

#define VPIF_SLICED_BUF_SIZE		(256)

#define VPIF_SLICED_MAX_SERVICES	(3)

#define VPIF_VIDEO_INDEX		(0)

#define VPIF_VBI_INDEX			(1)

#define VPIF_HBI_INDEX			(2)

/* Setting it to 1 as HBI/VBI support yet to be added , else 3*/

#define VPIF_NUMOBJECTS	(1)

/* Macros */

#define ISALIGNED(a)    (0 == ((a) & 7))

/* enumerated data types */

/* Enumerated data type to give id to each device per channel */

enum vpif_channel_id {

	VPIF_CHANNEL2_VIDEO = 0,	/* Channel2 Video */

	VPIF_CHANNEL3_VIDEO,		/* Channel3 Video */

};

/* structures */

struct video_obj {

	enum v4l2_field buf_field;

	u32 latest_only;		/* indicate whether to return

					 * most recent displayed frame only */

	v4l2_std_id stdid;		/* Currently selected or default

					 * standard */

	u32 output_id;			/* Current output id */

};

struct vbi_obj {

	int num_services;

	struct vpif_vbi_params vbiparams;	/* vpif parameters for the raw

						 * vbi data */

};

struct common_obj {

	/* Buffer specific parameters */

	u8 *fbuffers[VIDEO_MAX_FRAME];		/* List of buffer pointers for

						 * storing frames */

	u32 numbuffers;				/* number of buffers */

	struct videobuf_buffer *cur_frm;	/* Pointer pointing to current

						 * videobuf_buffer */

	struct videobuf_buffer *next_frm;	/* Pointer pointing to next

						 * videobuf_buffer */

	enum v4l2_memory memory;		/* This field keeps track of

						 * type of buffer exchange

						 * method user has selected */

	struct v4l2_format fmt;			/* Used to store the format */

	struct videobuf_queue buffer_queue;	/* Buffer queue used in

						 * video-buf */

	struct list_head dma_queue;		/* Queue of filled frames */

	spinlock_t irqlock;			/* Used in video-buf */

	/* channel specific parameters */

	struct mutex lock;			/* lock used to access this

						 * structure */

	u32 io_usrs;				/* number of users performing

						 * IO */

	u8 started;				/* Indicates whether streaming

						 * started */

	u32 ytop_off;				/* offset of Y top from the

						 * starting of the buffer */

	u32 ybtm_off;				/* offset of Y bottom from the

						 * starting of the buffer */

	u32 ctop_off;				/* offset of C top from the

						 * starting of the buffer */

	u32 cbtm_off;				/* offset of C bottom from the

						 * starting of the buffer */

	/* Function pointer to set the addresses */

	void (*set_addr) (unsigned long, unsigned long,

				unsigned long, unsigned long);

	u32 height;

	u32 width;

};

struct channel_obj {

	/* V4l2 specific parameters */

	struct video_device *video_dev;	/* Identifies video device for

					 * this channel */

	struct v4l2_prio_state prio;	/* Used to keep track of state of

					 * the priority */

	atomic_t usrs;			/* number of open instances of

					 * the channel */

	u32 field_id;			/* Indicates id of the field

					 * which is being displayed */

	u8 initialized;			/* flag to indicate whether

					 * encoder is initialized */

	enum vpif_channel_id channel_id;/* Identifies channel */

	struct vpif_params vpifparams;

	struct common_obj common[VPIF_NUMOBJECTS];

	struct video_obj video;

	struct vbi_obj vbi;

};

/* File handle structure */

struct vpif_fh {

	struct channel_obj *channel;	/* pointer to channel object for

					 * opened device */

	u8 io_allowed[VPIF_NUMOBJECTS];	/* Indicates whether this file handle

					 * is doing IO */

	enum v4l2_priority prio;	/* Used to keep track priority of

					 * this instance */

	u8 initialized;			/* Used to keep track of whether this

					 * file handle has initialized

					 * channel or not */

};

/* vpif device structure */

struct vpif_device {

	struct v4l2_device v4l2_dev;

	struct channel_obj *dev[VPIF_DISPLAY_NUM_CHANNELS];

	struct v4l2_subdev **sd;

};

struct vpif_config_params {

	u32 min_bufsize[VPIF_DISPLAY_NUM_CHANNELS];

	u32 channel_bufsize[VPIF_DISPLAY_NUM_CHANNELS];

	u8 numbuffers[VPIF_DISPLAY_NUM_CHANNELS];

	u8 min_numbuffers;

};

/* Struct which keeps track of the line numbers for the sliced vbi service */

struct vpif_service_line {

	u16 service_id;

	u16 service_line[2];

	u16 enc_service_id;

	u8 bytestowrite;

};

#endif				/* DAVINCIHD_DISPLAY_H */