/* include/linux/s3c-fb.h
 *
 * Copyright 2008 Openmoko Inc.
 * Copyright 2008-2010 Simtec Electronics
 *      Ben Dooks <ben@simtec.co.uk>
 *      http://armlinux.simtec.co.uk/
 *
 * Samsung SoC Framebuffer driver
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software FoundatIon.
*/

#ifndef __S3C_FB_H__
#define __S3C_FB_H__

struct s3c_fb_user_window {
	int x;
	int y;
};

struct s3c_fb_user_plane_alpha {
	int		channel;
	unsigned char	red;
	unsigned char	green;
	unsigned char	blue;
};

struct s3c_fb_user_chroma {
	int		enabled;
	unsigned char	red;
	unsigned char	green;
	unsigned char	blue;
};

struct s3c_fb_user_ion_client {
	int	fd;
	int	offset;
};

enum s3c_fb_pixel_format {
	S3C_FB_PIXEL_FORMAT_RGBA_8888 = 0,
	S3C_FB_PIXEL_FORMAT_RGBX_8888 = 1,
	S3C_FB_PIXEL_FORMAT_RGBA_5551 = 2,
	S3C_FB_PIXEL_FORMAT_RGB_565 = 3,
	S3C_FB_PIXEL_FORMAT_BGRA_8888 = 4,
	S3C_FB_PIXEL_FORMAT_MAX = 5,
};

enum s3c_fb_blending {
	S3C_FB_BLENDING_NONE = 0,
	S3C_FB_BLENDING_PREMULT = 1,
	S3C_FB_BLENDING_COVERAGE = 2,
	S3C_FB_BLENDING_MAX = 3,
};

struct s3c_fb_win_config {
	enum {
		S3C_FB_WIN_STATE_DISABLED = 0,
		S3C_FB_WIN_STATE_COLOR,
		S3C_FB_WIN_STATE_BUFFER,
	} state;

	union {
		__u32 color;
		struct {
			int				fd;
			__u32				offset;
			__u32				stride;
			enum s3c_fb_pixel_format	format;
			enum s3c_fb_blending		blending;
			int				fence_fd;
		};
	};

	int	x;
	int	y;
	__u32	w;
	__u32	h;
};

/* S3C_FB_MAX_WIN
 * Set to the maximum number of windows that any of the supported hardware
 * can use. Since the platform data uses this for an array size, having it
 * set to the maximum of any version of the hardware can do is safe.
 */
#define S3C_FB_MAX_WIN	(5)

struct s3c_fb_win_config_data {
	int	fence;
	struct s3c_fb_win_config config[S3C_FB_MAX_WIN];
};

/* IOCTL commands */
#define S3CFB_WIN_POSITION		_IOW('F', 203, \
						struct s3c_fb_user_window)
#define S3CFB_WIN_SET_PLANE_ALPHA	_IOW('F', 204, \
						struct s3c_fb_user_plane_alpha)
#define S3CFB_WIN_SET_CHROMA		_IOW('F', 205, \
						struct s3c_fb_user_chroma)
#define S3CFB_SET_VSYNC_INT		_IOW('F', 206, __u32)

#define S3CFB_GET_ION_USER_HANDLE	_IOWR('F', 208, \
						struct s3c_fb_user_ion_client)
#define S3CFB_WIN_CONFIG		_IOW('F', 209, \
						struct s3c_fb_win_config_data)

#endif /* __S3C_FB_H__ */