06458e277e
Step 1 in moving the IIO core out of staging. Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/* The industrial I/O - event passing to userspace
|
|
*
|
|
* Copyright (c) 2008-2011 Jonathan Cameron
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*/
|
|
#ifndef _IIO_EVENTS_H_
|
|
#define _IIO_EVENTS_H_
|
|
|
|
#include <linux/ioctl.h>
|
|
#include <linux/types.h>
|
|
#include <linux/iio/types.h>
|
|
|
|
/**
|
|
* struct iio_event_data - The actual event being pushed to userspace
|
|
* @id: event identifier
|
|
* @timestamp: best estimate of time of event occurrence (often from
|
|
* the interrupt handler)
|
|
*/
|
|
struct iio_event_data {
|
|
__u64 id;
|
|
__s64 timestamp;
|
|
};
|
|
|
|
#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
|
|
|
|
enum iio_event_type {
|
|
IIO_EV_TYPE_THRESH,
|
|
IIO_EV_TYPE_MAG,
|
|
IIO_EV_TYPE_ROC,
|
|
IIO_EV_TYPE_THRESH_ADAPTIVE,
|
|
IIO_EV_TYPE_MAG_ADAPTIVE,
|
|
};
|
|
|
|
enum iio_event_direction {
|
|
IIO_EV_DIR_EITHER,
|
|
IIO_EV_DIR_RISING,
|
|
IIO_EV_DIR_FALLING,
|
|
};
|
|
|
|
/**
|
|
* IIO_EVENT_CODE() - create event identifier
|
|
* @chan_type: Type of the channel. Should be one of enum iio_chan_type.
|
|
* @diff: Whether the event is for an differential channel or not.
|
|
* @modifier: Modifier for the channel. Should be one of enum iio_modifier.
|
|
* @direction: Direction of the event. One of enum iio_event_direction.
|
|
* @type: Type of the event. Should be one enum iio_event_type.
|
|
* @chan: Channel number for non-differential channels.
|
|
* @chan1: First channel number for differential channels.
|
|
* @chan2: Second channel number for differential channels.
|
|
*/
|
|
|
|
#define IIO_EVENT_CODE(chan_type, diff, modifier, direction, \
|
|
type, chan, chan1, chan2) \
|
|
(((u64)type << 56) | ((u64)diff << 55) | \
|
|
((u64)direction << 48) | ((u64)modifier << 40) | \
|
|
((u64)chan_type << 32) | (((u16)chan2) << 16) | ((u16)chan1) | \
|
|
((u16)chan))
|
|
|
|
|
|
#define IIO_EV_DIR_MAX 4
|
|
#define IIO_EV_BIT(type, direction) \
|
|
(1 << (type*IIO_EV_DIR_MAX + direction))
|
|
|
|
/**
|
|
* IIO_MOD_EVENT_CODE() - create event identifier for modified channels
|
|
* @chan_type: Type of the channel. Should be one of enum iio_chan_type.
|
|
* @number: Channel number.
|
|
* @modifier: Modifier for the channel. Should be one of enum iio_modifier.
|
|
* @type: Type of the event. Should be one enum iio_event_type.
|
|
* @direction: Direction of the event. One of enum iio_event_direction.
|
|
*/
|
|
|
|
#define IIO_MOD_EVENT_CODE(chan_type, number, modifier, \
|
|
type, direction) \
|
|
IIO_EVENT_CODE(chan_type, 0, modifier, direction, type, number, 0, 0)
|
|
|
|
/**
|
|
* IIO_UNMOD_EVENT_CODE() - create event identifier for unmodified channels
|
|
* @chan_type: Type of the channel. Should be one of enum iio_chan_type.
|
|
* @number: Channel number.
|
|
* @type: Type of the event. Should be one enum iio_event_type.
|
|
* @direction: Direction of the event. One of enum iio_event_direction.
|
|
*/
|
|
|
|
#define IIO_UNMOD_EVENT_CODE(chan_type, number, type, direction) \
|
|
IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0)
|
|
|
|
#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
|
|
|
|
#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0xCF)
|
|
|
|
#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
|
|
|
|
/* Event code number extraction depends on which type of event we have.
|
|
* Perhaps review this function in the future*/
|
|
#define IIO_EVENT_CODE_EXTRACT_CHAN(mask) ((__s16)(mask & 0xFFFF))
|
|
#define IIO_EVENT_CODE_EXTRACT_CHAN2(mask) ((__s16)(((mask) >> 16) & 0xFFFF))
|
|
|
|
#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
|
|
#define IIO_EVENT_CODE_EXTRACT_DIFF(mask) (((mask) >> 55) & 0x1)
|
|
|
|
#endif
|