/*
 * include/linux/media/camera_device.h
 *
 * camera device driver header
 *
 * Copyright (c) 2019 NVIDIA Corporation.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __UAPI_CAMERA_DEVICE_H_
#define __UAPI_CAMERA_DEVICE_H_

#include <linux/types.h>
#include <linux/ioctl.h>

#define __CAMERA_DEVICE_ALIGN __aligned(8)

/* Sensor, focuser, iris etc., */
#define MAX_DEVICES_PER_CHANNEL 4

/*
 * Increasing below values must validate
 * copy_from or copy_to works properly
 */
#define MAX_COMMANDS 256
#define MAX_BLOB_SIZE 2048

struct i2c_bus {
	__u32 reg_base;
	__u32 clk_rate;
	__u32 flags;
	__u8 reserved[4];
};

struct i2c_mux {
	bool is_mux_valid;
	__u8 mux_channel;
	__u16 mux_addr;
	__u8 reserved[4];
};

struct i2c_dev {
	__u16 addr;
	__u8 pad[2];
	__u32 flags;
};

struct spi_bus {
	__u32 reg_base;
	__u32 clk_rate;
	__u32 flags;
	__u8 reserved[4];
};

struct spi_dev {
	__u8 port;
	__u16 addr;
	__u8 pad;
	__u32 flags;
	__u8 pad1[4];
};

struct i2c_sensor_cfg {
	__u32 num_devs;
	struct i2c_bus bus;
	struct i2c_mux mux;
	struct i2c_dev sd[MAX_DEVICES_PER_CHANNEL];
};

struct spi_sensor_cfg {
	__u32 num_devs;
	struct spi_bus bus;
	struct spi_dev sd[MAX_DEVICES_PER_CHANNEL];
};

struct sensor_cfg {
	__u8 type; /* SPI or I2C */
	__u8 pad[3]; /* for alignment */
	union {
		struct i2c_sensor_cfg i2c_sensor;
		struct spi_sensor_cfg spi_sensor;
	} u;
} __CAMERA_DEVICE_ALIGN;

struct sensor_cmd {
	__u32 opcode;
	__u32 addr;
};

struct sensor_blob {
	__u32 num_cmds;
	__u32 buf_size;
	struct sensor_cmd cmds[MAX_COMMANDS];
	__u8 buf[MAX_BLOB_SIZE];
} __CAMERA_DEVICE_ALIGN;

struct sensor_blob_cfg {
	__u32 nlines;
	struct sensor_blob *blob;
} __CAMERA_DEVICE_ALIGN;

#define CAMERA_DEVICE_NONE		0
#define	CAMERA_DEVICE_I2C_SENSOR	(0x1 << 1)
#define	CAMERA_DEVICE_SPI_SENSOR	(0x1 << 2)
/* Future extensions - if necessary */
#define	CAMERA_DEVICE_VI		(0x1 << 8)
#define	CAMERA_DEVICE_CSI		(0x1 << 9)
#define CAMERA_DEVICE_ISP		(0x1 << 16)

struct camdev_chan_cfg {
	__u32 type;
	struct sensor_cfg scfg;
} __CAMERA_DEVICE_ALIGN;

/* common functionality */
#define CAMERA_DEVICE_REGISTER _IOW('C', 1, struct camdev_chan_cfg)
#define CAMERA_DEVICE_UNREGISTER _IOW('C', 2, __u32)
/* sensor functionality */
#define SENSOR_BLOB_EXECUTE _IOW('C', 10, struct sensor_blob_cfg)

#endif