1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /* The industrial I/O - event passing to userspace
3  *
4  * Copyright (c) 2008-2011 Jonathan Cameron
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License version 2 as published by
8  * the Free Software Foundation.
9  */
10 #ifndef _UAPI_IIO_EVENTS_H_
11 #define _UAPI_IIO_EVENTS_H_
12 
13 #include <linux/ioctl.h>
14 #include <linux/types.h>
15 
16 /**
17  * struct iio_event_data - The actual event being pushed to userspace
18  * @id:		event identifier
19  * @timestamp:	best estimate of time of event occurrence (often from
20  *		the interrupt handler)
21  */
22 struct iio_event_data {
23 	__u64	id;
24 	__s64	timestamp;
25 };
26 
27 #define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
28 
29 #define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
30 
31 #define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0x7F)
32 
33 #define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
34 
35 /* Event code number extraction depends on which type of event we have.
36  * Perhaps review this function in the future*/
37 #define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((__s16)(mask & 0xFFFF))
38 #define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((__s16)(((mask) >> 16) & 0xFFFF))
39 
40 #define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
41 #define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)
42 
43 #endif /* _UAPI_IIO_EVENTS_H_ */
44