path: root/drivers/media/platform/sh_veu.c

/*
 * sh-mobile VEU mem2mem driver
 *
 * Copyright (C) 2012 Renesas Electronics Corporation
 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
 * Copyright (C) 2008 Magnus Damm
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the version 2 of the GNU General Public License as
 * published by the Free Software Foundation
 */

#include <linux/err.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/videodev2.h>

#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>

#define VEU_STR 0x00 /* start register */
#define VEU_SWR 0x10 /* src: line length */
#define VEU_SSR 0x14 /* src: image size */
#define VEU_SAYR 0x18 /* src: y/rgb plane address */
#define VEU_SACR 0x1c /* src: c plane address */
#define VEU_BSSR 0x20 /* bundle mode register */
#define VEU_EDWR 0x30 /* dst: line length */
#define VEU_DAYR 0x34 /* dst: y/rgb plane address */
#define VEU_DACR 0x38 /* dst: c plane address */
#define VEU_TRCR 0x50 /* transform control */
#define VEU_RFCR 0x54 /* resize scale */
#define VEU_RFSR 0x58 /* resize clip */
#define VEU_ENHR 0x5c /* enhance */
#define VEU_FMCR 0x70 /* filter mode */
#define VEU_VTCR 0x74 /* lowpass vertical */
#define VEU_HTCR 0x78 /* lowpass horizontal */
#define VEU_APCR 0x80 /* color match */
#define VEU_ECCR 0x84 /* color replace */
#define VEU_AFXR 0x90 /* fixed mode */
#define VEU_SWPR 0x94 /* swap */
#define VEU_EIER 0xa0 /* interrupt mask */
#define VEU_EVTR 0xa4 /* interrupt event */
#define VEU_STAR 0xb0 /* status */
#define VEU_BSRR 0xb4 /* reset */

#define VEU_MCR00 0x200 /* color conversion matrix coefficient 00 */
#define VEU_MCR01 0x204 /* color conversion matrix coefficient 01 */
#define VEU_MCR02 0x208 /* color conversion matrix coefficient 02 */
#define VEU_MCR10 0x20c /* color conversion matrix coefficient 10 */
#define VEU_MCR11 0x210 /* color conversion matrix coefficient 11 */
#define VEU_MCR12 0x214 /* color conversion matrix coefficient 12 */
#define VEU_MCR20 0x218 /* color conversion matrix coefficient 20 */
#define VEU_MCR21 0x21c /* color conversion matrix coefficient 21 */
#define VEU_MCR22 0x220 /* color conversion matrix coefficient 22 */
#define VEU_COFFR 0x224 /* color conversion offset */
#define VEU_CBR   0x228 /* color conversion clip */

/*
 * 4092x4092 max size is the normal case. In some cases it can be reduced to
 * 2048x2048, in other cases it can be 4092x8188 or even 8188x8188.
 */
#define MAX_W 4092
#define MAX_H 4092
#define MIN_W 8
#define MIN_H 8
#define ALIGN_W 4

/* 3 buffers of 2048 x 1536 - 3 megapixels @ 16bpp */
#define VIDEO_MEM_LIMIT ALIGN(2048 * 1536 * 2 * 3, 1024 * 1024)

#define MEM2MEM_DEF_TRANSLEN 1

struct sh_veu_dev;

struct sh_veu_file {
	struct sh_veu_dev *veu_dev;
	bool cfg_needed;
};

struct sh_veu_format {
	char *name;
	u32 fourcc;
	unsigned int depth;
	unsigned int ydepth;
};

/* video data format */
struct sh_veu_vfmt {
	/* Replace with v4l2_rect */
	struct v4l2_rect		frame;
	unsigned int			bytesperline;
	unsigned int			offset_y;
	unsigned int			offset_c;
	const struct sh_veu_format	*fmt;
};

struct sh_veu_dev {
	struct v4l2_device v4l2_dev;
	struct video_device vdev;
	struct v4l2_m2m_dev *m2m_dev;
	struct device *dev;
	struct v4l2_m2m_ctx *m2m_ctx;
	struct sh_veu_vfmt vfmt_out;
	struct sh_veu_vfmt vfmt_in;
	/* Only single user per direction so far */
	struct sh_veu_file *capture;
	struct sh_veu_file *output;
	struct mutex fop_lock;
	void __iomem *base;
	struct vb2_alloc_ctx *alloc_ctx;
	spinlock_t lock;
	bool is_2h;
	unsigned int xaction;
	bool aborting;
};

enum sh_veu_fmt_idx {
	SH_VEU_FMT_NV12,
	SH_VEU_FMT_NV16,
	SH_VEU_FMT_NV24,
	SH_VEU_FMT_RGB332,
	SH_VEU_FMT_RGB444,
	SH_VEU_FMT_RGB565,
	SH_VEU_FMT_RGB666,
	SH_VEU_FMT_RGB24,
};

#define VGA_WIDTH	640
#define VGA_HEIGHT	480

#define DEFAULT_IN_WIDTH	VGA_WIDTH
#define DEFAULT_IN_HEIGHT	VGA_HEIGHT
#define DEFAULT_IN_FMTIDX	SH_VEU_FMT_NV12
#define DEFAULT_OUT_WIDTH	VGA_WIDTH
#define DEFAULT_OUT_HEIGHT	VGA_HEIGHT