xref: /openbmc/linux/include/uapi/linux/uvcvideo.h (revision b8392129)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef __LINUX_UVCVIDEO_H_
3 #define __LINUX_UVCVIDEO_H_
4 
5 #include <linux/ioctl.h>
6 #include <linux/types.h>
7 
8 /*
9  * Dynamic controls
10  */
11 
12 /* Data types for UVC control data */
13 #define UVC_CTRL_DATA_TYPE_RAW		0
14 #define UVC_CTRL_DATA_TYPE_SIGNED	1
15 #define UVC_CTRL_DATA_TYPE_UNSIGNED	2
16 #define UVC_CTRL_DATA_TYPE_BOOLEAN	3
17 #define UVC_CTRL_DATA_TYPE_ENUM		4
18 #define UVC_CTRL_DATA_TYPE_BITMASK	5
19 
20 /* Control flags */
21 #define UVC_CTRL_FLAG_SET_CUR		(1 << 0)
22 #define UVC_CTRL_FLAG_GET_CUR		(1 << 1)
23 #define UVC_CTRL_FLAG_GET_MIN		(1 << 2)
24 #define UVC_CTRL_FLAG_GET_MAX		(1 << 3)
25 #define UVC_CTRL_FLAG_GET_RES		(1 << 4)
26 #define UVC_CTRL_FLAG_GET_DEF		(1 << 5)
27 /* Control should be saved at suspend and restored at resume. */
28 #define UVC_CTRL_FLAG_RESTORE		(1 << 6)
29 /* Control can be updated by the camera. */
30 #define UVC_CTRL_FLAG_AUTO_UPDATE	(1 << 7)
31 /* Control supports asynchronous reporting */
32 #define UVC_CTRL_FLAG_ASYNCHRONOUS	(1 << 8)
33 
34 #define UVC_CTRL_FLAG_GET_RANGE \
35 	(UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_MIN | \
36 	 UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | \
37 	 UVC_CTRL_FLAG_GET_DEF)
38 
39 #define UVC_MENU_NAME_LEN 32
40 
41 struct uvc_menu_info {
42 	__u32 value;
43 	__u8 name[UVC_MENU_NAME_LEN];
44 };
45 
46 struct uvc_xu_control_mapping {
47 	__u32 id;
48 	__u8 name[32];
49 	__u8 entity[16];
50 	__u8 selector;
51 
52 	__u8 size;
53 	__u8 offset;
54 	__u32 v4l2_type;
55 	__u32 data_type;
56 
57 	struct uvc_menu_info __user *menu_info;
58 	__u32 menu_count;
59 
60 	__u32 reserved[4];
61 };
62 
63 struct uvc_xu_control_query {
64 	__u8 unit;
65 	__u8 selector;
66 	__u8 query;		/* Video Class-Specific Request Code, */
67 				/* defined in linux/usb/video.h A.8.  */
68 	__u16 size;
69 	__u8 __user *data;
70 };
71 
72 #define UVCIOC_CTRL_MAP		_IOWR('u', 0x20, struct uvc_xu_control_mapping)
73 #define UVCIOC_CTRL_QUERY	_IOWR('u', 0x21, struct uvc_xu_control_query)
74 
75 /*
76  * Metadata node
77  */
78 
79 /**
80  * struct uvc_meta_buf - metadata buffer building block
81  * @ns: system timestamp of the payload in nanoseconds
82  * @sof: USB Frame Number
83  * @length: length of the payload header
84  * @flags: payload header flags
85  * @buf: optional device-specific header data
86  *
87  * UVC metadata nodes fill buffers with possibly multiple instances of this
88  * struct. The first two fields are added by the driver, they can be used for
89  * clock synchronisation. The rest is an exact copy of a UVC payload header.
90  * Only complete objects with complete buffers are included. Therefore it's
91  * always sizeof(meta->ns) + sizeof(meta->sof) + meta->length bytes large.
92  */
93 struct uvc_meta_buf {
94 	__u64 ns;
95 	__u16 sof;
96 	__u8 length;
97 	__u8 flags;
98 	__u8 buf[];
99 } __packed;
100 
101 #endif
102