1/*
2 * Media Bus API header
3 *
4 * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef V4L2_MEDIABUS_H
12#define V4L2_MEDIABUS_H
13
14#include <linux/v4l2-mediabus.h>
15
16/* Parallel flags */
17/*
18 * Can the client run in master or in slave mode. By "Master mode" an operation
19 * mode is meant, when the client (e.g., a camera sensor) is producing
20 * horizontal and vertical synchronisation. In "Slave mode" the host is
21 * providing these signals to the slave.
22 */
23#define V4L2_MBUS_MASTER			(1 << 0)
24#define V4L2_MBUS_SLAVE				(1 << 1)
25/*
26 * Signal polarity flags
27 * Note: in BT.656 mode HSYNC, FIELD, and VSYNC are unused
28 * V4L2_MBUS_[HV]SYNC* flags should be also used for specifying
29 * configuration of hardware that uses [HV]REF signals
30 */
31#define V4L2_MBUS_HSYNC_ACTIVE_HIGH		(1 << 2)
32#define V4L2_MBUS_HSYNC_ACTIVE_LOW		(1 << 3)
33#define V4L2_MBUS_VSYNC_ACTIVE_HIGH		(1 << 4)
34#define V4L2_MBUS_VSYNC_ACTIVE_LOW		(1 << 5)
35#define V4L2_MBUS_PCLK_SAMPLE_RISING		(1 << 6)
36#define V4L2_MBUS_PCLK_SAMPLE_FALLING		(1 << 7)
37#define V4L2_MBUS_DATA_ACTIVE_HIGH		(1 << 8)
38#define V4L2_MBUS_DATA_ACTIVE_LOW		(1 << 9)
39/* FIELD = 0/1 - Field1 (odd)/Field2 (even) */
40#define V4L2_MBUS_FIELD_EVEN_HIGH		(1 << 10)
41/* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
42#define V4L2_MBUS_FIELD_EVEN_LOW		(1 << 11)
43
44/* Serial flags */
45/* How many lanes the client can use */
46#define V4L2_MBUS_CSI2_1_LANE			(1 << 0)
47#define V4L2_MBUS_CSI2_2_LANE			(1 << 1)
48#define V4L2_MBUS_CSI2_3_LANE			(1 << 2)
49#define V4L2_MBUS_CSI2_4_LANE			(1 << 3)
50/* On which channels it can send video data */
51#define V4L2_MBUS_CSI2_CHANNEL_0		(1 << 4)
52#define V4L2_MBUS_CSI2_CHANNEL_1		(1 << 5)
53#define V4L2_MBUS_CSI2_CHANNEL_2		(1 << 6)
54#define V4L2_MBUS_CSI2_CHANNEL_3		(1 << 7)
55/* Does it support only continuous or also non-continuous clock mode */
56#define V4L2_MBUS_CSI2_CONTINUOUS_CLOCK		(1 << 8)
57#define V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK	(1 << 9)
58
59#define V4L2_MBUS_CSI2_LANES		(V4L2_MBUS_CSI2_1_LANE | V4L2_MBUS_CSI2_2_LANE | \
60					 V4L2_MBUS_CSI2_3_LANE | V4L2_MBUS_CSI2_4_LANE)
61#define V4L2_MBUS_CSI2_CHANNELS		(V4L2_MBUS_CSI2_CHANNEL_0 | V4L2_MBUS_CSI2_CHANNEL_1 | \
62					 V4L2_MBUS_CSI2_CHANNEL_2 | V4L2_MBUS_CSI2_CHANNEL_3)
63
64/**
65 * v4l2_mbus_type - media bus type
66 * @V4L2_MBUS_PARALLEL:	parallel interface with hsync and vsync
67 * @V4L2_MBUS_BT656:	parallel interface with embedded synchronisation, can
68 *			also be used for BT.1120
69 * @V4L2_MBUS_CSI2:	MIPI CSI-2 serial interface
70 */
71enum v4l2_mbus_type {
72	V4L2_MBUS_PARALLEL,
73	V4L2_MBUS_BT656,
74	V4L2_MBUS_CSI2,
75};
76
77/**
78 * v4l2_mbus_config - media bus configuration
79 * @type:	in: interface type
80 * @flags:	in / out: configuration flags, depending on @type
81 */
82struct v4l2_mbus_config {
83	enum v4l2_mbus_type type;
84	unsigned int flags;
85};
86
87static inline void v4l2_fill_pix_format(struct v4l2_pix_format *pix_fmt,
88				const struct v4l2_mbus_framefmt *mbus_fmt)
89{
90	pix_fmt->width = mbus_fmt->width;
91	pix_fmt->height = mbus_fmt->height;
92	pix_fmt->field = mbus_fmt->field;
93	pix_fmt->colorspace = mbus_fmt->colorspace;
94}
95
96static inline void v4l2_fill_mbus_format(struct v4l2_mbus_framefmt *mbus_fmt,
97			   const struct v4l2_pix_format *pix_fmt,
98			   enum v4l2_mbus_pixelcode code)
99{
100	mbus_fmt->width = pix_fmt->width;
101	mbus_fmt->height = pix_fmt->height;
102	mbus_fmt->field = pix_fmt->field;
103	mbus_fmt->colorspace = pix_fmt->colorspace;
104	mbus_fmt->code = code;
105}
106
107#endif
108