LXR linux/include/media/v4l2-of.h

   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 * @lane_polarities: polarity of the lanes. The order is the same of
  33 *                 the physical lanes.
  34 */
  35struct v4l2_of_bus_mipi_csi2 {
  36        unsigned int flags;
  37        unsigned char data_lanes[4];
  38        unsigned char clock_lane;
  39        unsigned short num_data_lanes;
  40        bool lane_polarities[5];
  41};
  42
  43/**
  44 * struct v4l2_of_bus_parallel - parallel data bus data structure
  45 * @flags: media bus (V4L2_MBUS_*) flags
  46 * @bus_width: bus width in bits
  47 * @data_shift: data shift in bits
  48 */
  49struct v4l2_of_bus_parallel {
  50        unsigned int flags;
  51        unsigned char bus_width;
  52        unsigned char data_shift;
  53};
  54
  55/**
  56 * struct v4l2_of_endpoint - the endpoint data structure
  57 * @base: struct of_endpoint containing port, id, and local of_node
  58 * @bus_type: bus type
  59 * @bus: bus configuration data structure
  60 * @head: list head for this structure
  61 */
  62struct v4l2_of_endpoint {
  63        struct of_endpoint base;
  64        enum v4l2_mbus_type bus_type;
  65        union {
  66                struct v4l2_of_bus_parallel parallel;
  67                struct v4l2_of_bus_mipi_csi2 mipi_csi2;
  68        } bus;
  69        struct list_head head;
  70};
  71
  72/**
  73 * struct v4l2_of_link - a link between two endpoints
  74 * @local_node: pointer to device_node of this endpoint
  75 * @local_port: identifier of the port this endpoint belongs to
  76 * @remote_node: pointer to device_node of the remote endpoint
  77 * @remote_port: identifier of the port the remote endpoint belongs to
  78 */
  79struct v4l2_of_link {
  80        struct device_node *local_node;
  81        unsigned int local_port;
  82        struct device_node *remote_node;
  83        unsigned int remote_port;
  84};
  85
  86#ifdef CONFIG_OF
  87int v4l2_of_parse_endpoint(const struct device_node *node,
  88                           struct v4l2_of_endpoint *endpoint);
  89int v4l2_of_parse_link(const struct device_node *node,
  90                       struct v4l2_of_link *link);
  91void v4l2_of_put_link(struct v4l2_of_link *link);
  92#else /* CONFIG_OF */
  93
  94static inline int v4l2_of_parse_endpoint(const struct device_node *node,
  95                                        struct v4l2_of_endpoint *link)
  96{
  97        return -ENOSYS;
  98}
  99
 100static inline int v4l2_of_parse_link(const struct device_node *node,
 101                                     struct v4l2_of_link *link)
 102{
 103        return -ENOSYS;
 104}
 105
 106static inline void v4l2_of_put_link(struct v4l2_of_link *link)
 107{
 108}
 109
 110#endif /* CONFIG_OF */
 111
 112#endif /* _V4L2_OF_H */
 113