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_ */