/* SPDX-License-Identifier: GPL-2.0 */
/*
 * i.MX8QXP/i.MX8QM JPEG encoder/decoder v4l2 driver
 *
 * Copyright 2018-2019 NXP
 */

#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fh.h>

#ifndef _MXC_JPEG_CORE_H
#define _MXC_JPEG_CORE_H

#define MXC_JPEG_NAME			"mxc-jpeg"
#define MXC_JPEG_FMT_TYPE_ENC		0
#define MXC_JPEG_FMT_TYPE_RAW		1
#define MXC_JPEG_DEFAULT_WIDTH		1280
#define MXC_JPEG_DEFAULT_HEIGHT		720
#define MXC_JPEG_DEFAULT_PFMT		V4L2_PIX_FMT_RGB24
#define MXC_JPEG_MIN_WIDTH		64
#define MXC_JPEG_MIN_HEIGHT		64
#define MXC_JPEG_MAX_WIDTH		0x2000
#define MXC_JPEG_MAX_HEIGHT		0x2000
#define MXC_JPEG_MAX_CFG_STREAM		0x1000
#define MXC_JPEG_H_ALIGN		3
#define MXC_JPEG_W_ALIGN		3
#define MXC_JPEG_MAX_SIZEIMAGE		0xFFFFFC00
#define MXC_JPEG_MAX_PLANES		2

enum mxc_jpeg_enc_state {
	MXC_JPEG_ENCODING	= 0, /* jpeg encode phase */
	MXC_JPEG_ENC_CONF	= 1, /* jpeg encoder config phase */
};

enum mxc_jpeg_mode {
	MXC_JPEG_DECODE	= 0, /* jpeg decode mode */
	MXC_JPEG_ENCODE	= 1, /* jpeg encode mode */
};

/**
 * struct mxc_jpeg_fmt - driver's internal color format data
 * @name:	format description
 * @fourcc:	fourcc code, 0 if not applicable
 * @subsampling: subsampling of jpeg components
 * @nc:		number of color components
 * @depth:	number of bits per pixel
 * @colplanes:	number of color planes (1 for packed formats)
 * @h_align:	horizontal alignment order (align to 2^h_align)
 * @v_align:	vertical alignment order (align to 2^v_align)
 * @flags:	flags describing format applicability
 * @precision:  jpeg sample precision
 */
struct mxc_jpeg_fmt {
	const char				*name;
	u32					fourcc;
	enum v4l2_jpeg_chroma_subsampling	subsampling;
	int					nc;
	int					depth;
	int					colplanes;
	int					h_align;
	int					v_align;
	u32					flags;
	u8					precision;
};

struct mxc_jpeg_desc {
	u32 next_descpt_ptr;
	u32 buf_base0;
	u32 buf_base1;
	u32 line_pitch;
	u32 stm_bufbase;
	u32 stm_bufsize;
	u32 imgsize;
	u32 stm_ctrl;
} __packed;

struct mxc_jpeg_q_data {
	const struct mxc_jpeg_fmt	*fmt;
	u32				sizeimage[MXC_JPEG_MAX_PLANES];
	u32				bytesperline[MXC_JPEG_MAX_PLANES];
	int				w;
	int				w_adjusted;
	int				h;
	int				h_adjusted;
	unsigned int			sequence;
};

struct mxc_jpeg_ctx {
	struct mxc_jpeg_dev		*mxc_jpeg;
	struct mxc_jpeg_q_data		out_q;
	struct mxc_jpeg_q_data		cap_q;
	struct v4l2_fh			fh;
	enum mxc_jpeg_enc_state		enc_state;
	unsigned int			slot;
	unsigned int			source_change;
	bool				header_parsed;
};

struct mxc_jpeg_slot_data {
	bool used;
	struct mxc_jpeg_desc *desc; // enc/dec descriptor
	struct mxc_jpeg_desc *cfg_desc; // configuration descriptor
	void *cfg_stream_vaddr; // configuration bitstream virtual address
	unsigned int cfg_stream_size;
	dma_addr_t desc_handle;
	dma_addr_t cfg_desc_handle; // configuration descriptor dma address
	dma_addr_t cfg_stream_handle; // configuration bitstream dma address
};

struct mxc_jpeg_dev {
	spinlock_t			hw_lock; /* hardware access lock */
	unsigned int			mode;
	struct mutex			lock; /* v4l2 ioctls serialization */
	struct clk			*clk_ipg;
	struct clk			*clk_per;
	struct platform_device		*pdev;
	struct device			*dev;
	void __iomem			*base_reg;
	struct v4l2_device		v4l2_dev;
	struct v4l2_m2m_dev		*m2m_dev;
	struct video_device		*dec_vdev;
	struct mxc_jpeg_slot_data	slot_data[MXC_MAX_SLOTS];
	int				num_domains;
	struct device			**pd_dev;
	struct device_link		**pd_link;
};

/**
 * struct mxc_jpeg_sof_comp - JPEG Start Of Frame component fields
 * @id:				component id
 * @v:				vertical sampling
 * @h:				horizontal sampling
 * @quantization_table_no:	id of quantization table
 */
struct mxc_jpeg_sof_comp {
	u8 id;
	u8 v :4;
	u8 h :4;
	u8 quantization_table_no;
} __packed;

#define MXC_JPEG_MAX_COMPONENTS 4
/**
 * struct mxc_jpeg_sof - JPEG Start Of Frame marker fields
 * @length:		Start of Frame length
 * @precision:		precision (bits per pixel per color component)
 * @height:		image height
 * @width:		image width
 * @components_no:	number of color components
 * @comp:		component fields for each color component
 */
struct mxc_jpeg_sof {
	u16 length;
	u8 precision;
	u16 height, width;
	u8 components_no;
	struct mxc_jpeg_sof_comp comp[MXC_JPEG_MAX_COMPONENTS];
} __packed;

/**
 * struct mxc_jpeg_sos_comp - JPEG Start Of Scan component fields
 * @id:			component id
 * @huffman_table_no:	id of the Huffman table
 */
struct mxc_jpeg_sos_comp {
	u8 id; /*component id*/
	u8 huffman_table_no;
} __packed;

/**
 * struct mxc_jpeg_sos - JPEG Start Of Scan marker fields
 * @length:		Start of Frame length
 * @components_no:	number of color components
 * @comp:		SOS component fields for each color component
 * @ignorable_bytes:	ignorable bytes
 */
struct mxc_jpeg_sos {
	u16 length;
	u8 components_no;
	struct mxc_jpeg_sos_comp comp[MXC_JPEG_MAX_COMPONENTS];
	u8 ignorable_bytes[3];
} __packed;

#endif