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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  */
21 struct 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