ca50c197bd
The fwnode_handle is a more generic way than OF device_node to describe firmware nodes. Instead of the OF API, use more generic fwnode API to obtain the same information. As the V4L2 fwnode support will be required by a small minority of e.g. ACPI based systems (the same might actually go for OF), make this a module instead of embedding it in the videodev module. The origins of the V4L2 fwnode framework is in the V4L2 OF framework. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Tested-by: Hans Verkuil <hans.verkuil@cisco.com> Tested-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/*
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* V4L2 fwnode binding parsing library
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*
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* Copyright (c) 2016 Intel Corporation.
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* Author: Sakari Ailus <sakari.ailus@linux.intel.com>
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*
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* Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
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* Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
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*
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* Copyright (C) 2012 Renesas Electronics Corp.
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* Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*/
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#ifndef _V4L2_FWNODE_H
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#define _V4L2_FWNODE_H
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#include <linux/errno.h>
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#include <linux/fwnode.h>
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#include <linux/list.h>
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#include <linux/types.h>
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#include <media/v4l2-mediabus.h>
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struct fwnode_handle;
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/**
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* struct v4l2_fwnode_bus_mipi_csi2 - MIPI CSI-2 bus data structure
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* @flags: media bus (V4L2_MBUS_*) flags
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* @data_lanes: an array of physical data lane indexes
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* @clock_lane: physical lane index of the clock lane
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* @num_data_lanes: number of data lanes
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* @lane_polarities: polarity of the lanes. The order is the same of
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* the physical lanes.
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*/
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struct v4l2_fwnode_bus_mipi_csi2 {
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unsigned int flags;
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unsigned char data_lanes[4];
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unsigned char clock_lane;
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unsigned short num_data_lanes;
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bool lane_polarities[5];
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};
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/**
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* struct v4l2_fwnode_bus_parallel - parallel data bus data structure
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* @flags: media bus (V4L2_MBUS_*) flags
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* @bus_width: bus width in bits
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* @data_shift: data shift in bits
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*/
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struct v4l2_fwnode_bus_parallel {
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unsigned int flags;
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unsigned char bus_width;
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unsigned char data_shift;
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};
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/**
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* struct v4l2_fwnode_endpoint - the endpoint data structure
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* @base: fwnode endpoint of the v4l2_fwnode
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* @bus_type: bus type
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* @bus: bus configuration data structure
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* @link_frequencies: array of supported link frequencies
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* @nr_of_link_frequencies: number of elements in link_frequenccies array
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*/
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struct v4l2_fwnode_endpoint {
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struct fwnode_endpoint base;
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/*
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* Fields below this line will be zeroed by
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* v4l2_fwnode_parse_endpoint()
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*/
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enum v4l2_mbus_type bus_type;
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union {
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struct v4l2_fwnode_bus_parallel parallel;
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struct v4l2_fwnode_bus_mipi_csi2 mipi_csi2;
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} bus;
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u64 *link_frequencies;
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unsigned int nr_of_link_frequencies;
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};
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/**
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* struct v4l2_fwnode_link - a link between two endpoints
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* @local_node: pointer to device_node of this endpoint
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* @local_port: identifier of the port this endpoint belongs to
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* @remote_node: pointer to device_node of the remote endpoint
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* @remote_port: identifier of the port the remote endpoint belongs to
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*/
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struct v4l2_fwnode_link {
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struct fwnode_handle *local_node;
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unsigned int local_port;
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struct fwnode_handle *remote_node;
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unsigned int remote_port;
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};
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int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode,
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struct v4l2_fwnode_endpoint *vep);
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struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
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struct fwnode_handle *fwnode);
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void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep);
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int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode,
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struct v4l2_fwnode_link *link);
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void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link);
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#endif /* _V4L2_FWNODE_H */
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