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/*
* V4L2 OF binding parsing library
*
* Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
* Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
*
* Copyright (C) 2012 Renesas Electronics Corp.
* Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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 <linux/of_graph.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
* @lane_polarities: polarity of the lanes. The order is the same of
* the physical lanes.
*/
struct v4l2_of_bus_mipi_csi2 {
unsigned int flags;
unsigned char data_lanes[4];
unsigned char clock_lane;
unsigned short num_data_lanes;
bool lane_polarities[5];
};
/**
* 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
* @base: struct of_endpoint containing port, id, and local of_node
* @bus_type: bus type
* @bus: bus configuration data structure
* @link_frequencies: array of supported link frequencies
* @nr_of_link_frequencies: number of elements in link_frequenccies array
*/
struct v4l2_of_endpoint {
struct of_endpoint base;
/* Fields below this line will be zeroed by v4l2_of_parse_endpoint() */
enum v4l2_mbus_type bus_type;
union {
struct v4l2_of_bus_parallel parallel;
struct v4l2_of_bus_mipi_csi2 mipi_csi2;
} bus;
u64 *link_frequencies;
unsigned int nr_of_link_frequencies;
};
/**
* struct v4l2_of_link - a link between two endpoints
* @local_node: pointer to device_node of this endpoint
* @local_port: identifier of the port this endpoint belongs to
* @remote_node: pointer to device_node of the remote endpoint
* @remote_port: identifier of the port the remote endpoint belongs to
*/
struct v4l2_of_link {
struct device_node *local_node;
unsigned int local_port;
struct device_node *remote_node;
unsigned int remote_port;
};
#ifdef CONFIG_OF
int v4l2_of_parse_endpoint(const struct device_node *node,
struct v4l2_of_endpoint *endpoint);
struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint(
const struct device_node *node);
void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint);
int v4l2_of_parse_link(const struct device_node *node,
struct v4l2_of_link *link);
void v4l2_of_put_link(struct v4l2_of_link *link);
#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 v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint(
const struct device_node *node)
{
return NULL;
}
static inline void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint)
{
}
static inline int v4l2_of_parse_link(const struct device_node *node,
struct v4l2_of_link *link)
{
return -ENOSYS;
}
static inline void v4l2_of_put_link(struct v4l2_of_link *link)
{
}
#endif /* CONFIG_OF */
#endif /* _V4L2_OF_H */
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