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

   1/*
   2 * V4L2 fwnode binding parsing library
   3 *
   4 * Copyright (c) 2016 Intel Corporation.
   5 * Author: Sakari Ailus <sakari.ailus@linux.intel.com>
   6 *
   7 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
   8 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
   9 *
  10 * Copyright (C) 2012 Renesas Electronics Corp.
  11 * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
  12 *
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of version 2 of the GNU General Public License as
  15 * published by the Free Software Foundation.
  16 */
  17#ifndef _V4L2_FWNODE_H
  18#define _V4L2_FWNODE_H
  19
  20#include <linux/errno.h>
  21#include <linux/fwnode.h>
  22#include <linux/list.h>
  23#include <linux/types.h>
  24
  25#include <media/v4l2-mediabus.h>
  26
  27struct fwnode_handle;
  28
  29/**
  30 * struct v4l2_fwnode_bus_mipi_csi2 - MIPI CSI-2 bus data structure
  31 * @flags: media bus (V4L2_MBUS_*) flags
  32 * @data_lanes: an array of physical data lane indexes
  33 * @clock_lane: physical lane index of the clock lane
  34 * @num_data_lanes: number of data lanes
  35 * @lane_polarities: polarity of the lanes. The order is the same of
  36 *                 the physical lanes.
  37 */
  38struct v4l2_fwnode_bus_mipi_csi2 {
  39        unsigned int flags;
  40        unsigned char data_lanes[4];
  41        unsigned char clock_lane;
  42        unsigned short num_data_lanes;
  43        bool lane_polarities[5];
  44};
  45
  46/**
  47 * struct v4l2_fwnode_bus_parallel - parallel data bus data structure
  48 * @flags: media bus (V4L2_MBUS_*) flags
  49 * @bus_width: bus width in bits
  50 * @data_shift: data shift in bits
  51 */
  52struct v4l2_fwnode_bus_parallel {
  53        unsigned int flags;
  54        unsigned char bus_width;
  55        unsigned char data_shift;
  56};
  57
  58/**
  59 * struct v4l2_fwnode_endpoint - the endpoint data structure
  60 * @base: fwnode endpoint of the v4l2_fwnode
  61 * @bus_type: bus type
  62 * @bus: bus configuration data structure
  63 * @link_frequencies: array of supported link frequencies
  64 * @nr_of_link_frequencies: number of elements in link_frequenccies array
  65 */
  66struct v4l2_fwnode_endpoint {
  67        struct fwnode_endpoint base;
  68        /*
  69         * Fields below this line will be zeroed by
  70         * v4l2_fwnode_parse_endpoint()
  71         */
  72        enum v4l2_mbus_type bus_type;
  73        union {
  74                struct v4l2_fwnode_bus_parallel parallel;
  75                struct v4l2_fwnode_bus_mipi_csi2 mipi_csi2;
  76        } bus;
  77        u64 *link_frequencies;
  78        unsigned int nr_of_link_frequencies;
  79};
  80
  81/**
  82 * struct v4l2_fwnode_link - a link between two endpoints
  83 * @local_node: pointer to device_node of this endpoint
  84 * @local_port: identifier of the port this endpoint belongs to
  85 * @remote_node: pointer to device_node of the remote endpoint
  86 * @remote_port: identifier of the port the remote endpoint belongs to
  87 */
  88struct v4l2_fwnode_link {
  89        struct fwnode_handle *local_node;
  90        unsigned int local_port;
  91        struct fwnode_handle *remote_node;
  92        unsigned int remote_port;
  93};
  94
  95int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
  96                               struct v4l2_fwnode_endpoint *vep);
  97struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
  98        struct fwnode_handle *fwnode);
  99void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep);
 100int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
 101                           struct v4l2_fwnode_link *link);
 102void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
 103
 104#endif /* _V4L2_FWNODE_H */
 105