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99fd133f GL |
1 | /* |
2 | * V4L2 OF binding parsing library | |
3 | * | |
c6e8d96d SN |
4 | * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. |
5 | * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> | |
6 | * | |
99fd133f GL |
7 | * Copyright (C) 2012 Renesas Electronics Corp. |
8 | * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> | |
9 | * | |
99fd133f GL |
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> | |
fd9fdb78 | 20 | #include <linux/of_graph.h> |
99fd133f GL |
21 | |
22 | #include <media/v4l2-mediabus.h> | |
23 | ||
24 | struct 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 | |
b6eec1c4 SA |
32 | * @lane_polarities: polarity of the lanes. The order is the same of |
33 | * the physical lanes. | |
99fd133f GL |
34 | */ |
35 | struct 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; | |
b6eec1c4 | 40 | bool lane_polarities[5]; |
99fd133f GL |
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 | */ | |
49 | struct 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 | |
f2a575f6 | 57 | * @base: struct of_endpoint containing port, id, and local of_node |
99fd133f GL |
58 | * @bus_type: bus type |
59 | * @bus: bus configuration data structure | |
698da18e SA |
60 | * @link_frequencies: array of supported link frequencies |
61 | * @nr_of_link_frequencies: number of elements in link_frequenccies array | |
99fd133f GL |
62 | */ |
63 | struct v4l2_of_endpoint { | |
f2a575f6 | 64 | struct of_endpoint base; |
161aadae | 65 | /* Fields below this line will be zeroed by v4l2_of_parse_endpoint() */ |
99fd133f GL |
66 | enum v4l2_mbus_type bus_type; |
67 | union { | |
68 | struct v4l2_of_bus_parallel parallel; | |
69 | struct v4l2_of_bus_mipi_csi2 mipi_csi2; | |
70 | } bus; | |
698da18e SA |
71 | u64 *link_frequencies; |
72 | unsigned int nr_of_link_frequencies; | |
99fd133f GL |
73 | }; |
74 | ||
c9bca8b3 LP |
75 | /** |
76 | * struct v4l2_of_link - a link between two endpoints | |
77 | * @local_node: pointer to device_node of this endpoint | |
78 | * @local_port: identifier of the port this endpoint belongs to | |
79 | * @remote_node: pointer to device_node of the remote endpoint | |
80 | * @remote_port: identifier of the port the remote endpoint belongs to | |
81 | */ | |
82 | struct v4l2_of_link { | |
83 | struct device_node *local_node; | |
84 | unsigned int local_port; | |
85 | struct device_node *remote_node; | |
86 | unsigned int remote_port; | |
87 | }; | |
88 | ||
99fd133f | 89 | #ifdef CONFIG_OF |
9ff889b6 LP |
90 | int v4l2_of_parse_endpoint(const struct device_node *node, |
91 | struct v4l2_of_endpoint *endpoint); | |
698da18e SA |
92 | struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint( |
93 | const struct device_node *node); | |
94 | void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint); | |
c9bca8b3 LP |
95 | int v4l2_of_parse_link(const struct device_node *node, |
96 | struct v4l2_of_link *link); | |
97 | void v4l2_of_put_link(struct v4l2_of_link *link); | |
99fd133f GL |
98 | #else /* CONFIG_OF */ |
99 | ||
100 | static inline int v4l2_of_parse_endpoint(const struct device_node *node, | |
101 | struct v4l2_of_endpoint *link) | |
102 | { | |
103 | return -ENOSYS; | |
104 | } | |
105 | ||
480856f3 | 106 | static inline struct v4l2_of_endpoint *v4l2_of_alloc_parse_endpoint( |
698da18e SA |
107 | const struct device_node *node) |
108 | { | |
109 | return NULL; | |
110 | } | |
111 | ||
480856f3 | 112 | static inline void v4l2_of_free_endpoint(struct v4l2_of_endpoint *endpoint) |
698da18e SA |
113 | { |
114 | } | |
115 | ||
c9bca8b3 LP |
116 | static inline int v4l2_of_parse_link(const struct device_node *node, |
117 | struct v4l2_of_link *link) | |
118 | { | |
119 | return -ENOSYS; | |
120 | } | |
121 | ||
122 | static inline void v4l2_of_put_link(struct v4l2_of_link *link) | |
123 | { | |
124 | } | |
125 | ||
99fd133f GL |
126 | #endif /* CONFIG_OF */ |
127 | ||
128 | #endif /* _V4L2_OF_H */ |