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