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128 lines
3.5 KiB
128 lines
3.5 KiB
/* |
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* V4L2 OF binding parsing library |
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* |
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* Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. |
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* Author: Sylwester Nawrocki <[email protected]> |
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* |
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* Copyright (C) 2012 Renesas Electronics Corp. |
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* Author: Guennadi Liakhovetski <[email protected]> |
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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_OF_H |
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#define _V4L2_OF_H |
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#include <linux/list.h> |
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#include <linux/types.h> |
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#include <linux/errno.h> |
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#include <linux/of_graph.h> |
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#include <media/v4l2-mediabus.h> |
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struct device_node; |
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/** |
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* struct v4l2_of_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_of_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_of_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_of_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_of_endpoint - the endpoint data structure |
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* @base: struct of_endpoint containing port, id, and local of_node |
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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_of_endpoint { |
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struct of_endpoint base; |
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/* Fields below this line will be zeroed by v4l2_of_parse_endpoint() */ |
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enum v4l2_mbus_type bus_type; |
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union { |
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struct v4l2_of_bus_parallel parallel; |
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struct v4l2_of_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_of_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_of_link { |
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struct device_node *local_node; |
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unsigned int local_port; |
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struct device_node *remote_node; |
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unsigned int remote_port; |
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}; |
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#ifdef CONFIG_OF |
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int v4l2_of_parse_endpoint(const struct device_node *node, |
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struct v4l2_of_endpoint *endpoint); |
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struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint( |
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const struct device_node *node); |
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void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint); |
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int v4l2_of_parse_link(const struct device_node *node, |
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struct v4l2_of_link *link); |
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void v4l2_of_put_link(struct v4l2_of_link *link); |
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#else /* CONFIG_OF */ |
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static inline int v4l2_of_parse_endpoint(const struct device_node *node, |
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struct v4l2_of_endpoint *link) |
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{ |
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return -ENOSYS; |
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} |
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static inline struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint( |
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const struct device_node *node) |
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{ |
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return NULL; |
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} |
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static inline void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint) |
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{ |
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} |
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static inline int v4l2_of_parse_link(const struct device_node *node, |
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struct v4l2_of_link *link) |
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{ |
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return -ENOSYS; |
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} |
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static inline void v4l2_of_put_link(struct v4l2_of_link *link) |
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{ |
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} |
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#endif /* CONFIG_OF */ |
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#endif /* _V4L2_OF_H */
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