/*
* V4L2 OF binding parsing library
*
* Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
* Author: Sylwester Nawrocki <[email protected]>
*
* Copyright (C) 2012 Renesas Electronics Corp.
* Author: Guennadi Liakhovetski <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*/
#ifndef _V4L2_OF_H
#define _V4L2_OF_H

#include <linux/list.h>
#include <linux/types.h>
#include <linux/errno.h>

#include <media/v4l2-mediabus.h>

struct device_node;

/**
* struct v4l2_of_bus_mipi_csi2 - MIPI CSI-2 bus data structure
* @flags: media bus (V4L2_MBUS_*) flags
* @data_lanes: an array of physical data lane indexes
* @clock_lane: physical lane index of the clock lane
* @num_data_lanes: number of data lanes
*/
struct v4l2_of_bus_mipi_csi2 {
unsigned int flags;
unsigned char data_lanes[4];
unsigned char clock_lane;
unsigned short num_data_lanes;
};

/**
* struct v4l2_of_bus_parallel - parallel data bus data structure
* @flags: media bus (V4L2_MBUS_*) flags
* @bus_width: bus width in bits
* @data_shift: data shift in bits
*/
struct v4l2_of_bus_parallel {
unsigned int flags;
unsigned char bus_width;
unsigned char data_shift;
};

/**
* struct v4l2_of_endpoint - the endpoint data structure
* @port: identifier (value of reg property) of a port this endpoint belongs to
* @id: identifier (value of reg property) of this endpoint
* @local_node: pointer to device_node of this endpoint
* @remote: phandle to remote endpoint node
* @bus_type: bus type
* @bus: bus configuration data structure
* @head: list head for this structure
*/
struct v4l2_of_endpoint {
unsigned int port;
unsigned int id;
const struct device_node *local_node;
const __be32 *remote;
enum v4l2_mbus_type bus_type;
union {
struct v4l2_of_bus_parallel parallel;
struct v4l2_of_bus_mipi_csi2 mipi_csi2;
} bus;
struct list_head head;
};

#ifdef CONFIG_OF
void v4l2_of_parse_endpoint(const struct device_node *node,
struct v4l2_of_endpoint *link);
struct device_node *v4l2_of_get_next_endpoint(const struct device_node *parent,
struct device_node *previous);
struct device_node *v4l2_of_get_remote_port_parent(
const struct device_node *node);
struct device_node *v4l2_of_get_remote_port(const struct device_node *node);
#else /* CONFIG_OF */

static inline int v4l2_of_parse_endpoint(const struct device_node *node,
struct v4l2_of_endpoint *link)
{
return -ENOSYS;
}

static inline struct device_node *v4l2_of_get_next_endpoint(
const struct device_node *parent,
struct device_node *previous)
{
return NULL;
}

static inline struct device_node *v4l2_of_get_remote_port_parent(
const struct device_node *node)
{
return NULL;
}

static inline struct device_node *v4l2_of_get_remote_port(
const struct device_node *node)
{
return NULL;
}

#endif /* CONFIG_OF */

#endif /* _V4L2_OF_H */