1/*
 2 * V4L2 OF binding parsing library
 3 *
 4 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
 5 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
 6 *
 7 * Copyright (C) 2012 Renesas Electronics Corp.
 8 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 */
14#ifndef _V4L2_OF_H
15#define _V4L2_OF_H
16
17#include <linux/list.h>
18#include <linux/types.h>
19#include <linux/errno.h>
20#include <linux/of_graph.h>
21
22#include <media/v4l2-mediabus.h>
23
24struct device_node;
25
26/**
27 * struct v4l2_of_bus_mipi_csi2 - MIPI CSI-2 bus data structure
28 * @flags: media bus (V4L2_MBUS_*) flags
29 * @data_lanes: an array of physical data lane indexes
30 * @clock_lane: physical lane index of the clock lane
31 * @num_data_lanes: number of data lanes
32 */
33struct v4l2_of_bus_mipi_csi2 {
34	unsigned int flags;
35	unsigned char data_lanes[4];
36	unsigned char clock_lane;
37	unsigned short num_data_lanes;
38};
39
40/**
41 * struct v4l2_of_bus_parallel - parallel data bus data structure
42 * @flags: media bus (V4L2_MBUS_*) flags
43 * @bus_width: bus width in bits
44 * @data_shift: data shift in bits
45 */
46struct v4l2_of_bus_parallel {
47	unsigned int flags;
48	unsigned char bus_width;
49	unsigned char data_shift;
50};
51
52/**
53 * struct v4l2_of_endpoint - the endpoint data structure
54 * @base: struct of_endpoint containing port, id, and local of_node
55 * @bus_type: bus type
56 * @bus: bus configuration data structure
57 * @head: list head for this structure
58 */
59struct v4l2_of_endpoint {
60	struct of_endpoint base;
61	enum v4l2_mbus_type bus_type;
62	union {
63		struct v4l2_of_bus_parallel parallel;
64		struct v4l2_of_bus_mipi_csi2 mipi_csi2;
65	} bus;
66	struct list_head head;
67};
68
69#ifdef CONFIG_OF
70int v4l2_of_parse_endpoint(const struct device_node *node,
71			   struct v4l2_of_endpoint *endpoint);
72#else /* CONFIG_OF */
73
74static inline int v4l2_of_parse_endpoint(const struct device_node *node,
75					struct v4l2_of_endpoint *link)
76{
77	return -ENOSYS;
78}
79
80#endif /* CONFIG_OF */
81
82#endif /* _V4L2_OF_H */