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
  21 #include <media/v4l2-mediabus.h>
  22
  23 struct device_node;
  24
  25 /**
  26  * struct v4l2_of_bus_mipi_csi2 - MIPI CSI-2 bus data structure
  27  * @flags: media bus (V4L2_MBUS_*) flags
  28  * @data_lanes: an array of physical data lane indexes
  29  * @clock_lane: physical lane index of the clock lane
  30  * @num_data_lanes: number of data lanes
  31  */
  32 struct v4l2_of_bus_mipi_csi2 {
  33         unsigned int flags;
  34         unsigned char data_lanes[4];
  35         unsigned char clock_lane;
  36         unsigned short num_data_lanes;
  37 };
  38
  39 /**
  40  * struct v4l2_of_bus_parallel - parallel data bus data structure
  41  * @flags: media bus (V4L2_MBUS_*) flags
  42  * @bus_width: bus width in bits
  43  * @data_shift: data shift in bits
  44  */
  45 struct v4l2_of_bus_parallel {
  46         unsigned int flags;
  47         unsigned char bus_width;
  48         unsigned char data_shift;
  49 };
  50
  51 /**
  52  * struct v4l2_of_endpoint - the endpoint data structure
  53  * @port: identifier (value of reg property) of a port this endpoint belongs to
  54  * @id: identifier (value of reg property) of this endpoint
  55  * @local_node: pointer to device_node of this endpoint
  56  * @bus_type: bus type
  57  * @bus: bus configuration data structure
  58  * @head: list head for this structure
  59  */
  60 struct v4l2_of_endpoint {
  61         unsigned int port;
  62         unsigned int id;
  63         const struct device_node *local_node;
  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 #ifdef CONFIG_OF
  73 int v4l2_of_parse_endpoint(const struct device_node *node,
  74                            struct v4l2_of_endpoint *endpoint);
  75 struct device_node *v4l2_of_get_next_endpoint(const struct device_node *parent,
  76                                         struct device_node *previous);
  77 struct device_node *v4l2_of_get_remote_port_parent(
  78                                         const struct device_node *node);
  79 struct device_node *v4l2_of_get_remote_port(const struct device_node *node);
  80 #else /* CONFIG_OF */
  81
  82 static inline int v4l2_of_parse_endpoint(const struct device_node *node,
  83                                         struct v4l2_of_endpoint *link)
  84 {
  85         return -ENOSYS;
  86 }
  87
  88 static inline struct device_node *v4l2_of_get_next_endpoint(
  89                                         const struct device_node *parent,
  90                                         struct device_node *previous)
  91 {
  92         return NULL;
  93 }
  94
  95 static inline struct device_node *v4l2_of_get_remote_port_parent(
  96                                         const struct device_node *node)
  97 {
  98         return NULL;
  99 }
 100
 101 static inline struct device_node *v4l2_of_get_remote_port(
 102                                         const struct device_node *node)
 103 {
 104         return NULL;
 105 }
 106
 107 #endif /* CONFIG_OF */
 108
 109 #endif /* _V4L2_OF_H */