1/* The industrial I/O core function defs.
2 *
3 * Copyright (c) 2008 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 * These definitions are meant for use only within the IIO core, not individual
10 * drivers.
11 */
12
13#ifndef _IIO_CORE_H_
14#define _IIO_CORE_H_
15#include <linux/kernel.h>
16#include <linux/device.h>
17
18struct iio_chan_spec;
19struct iio_dev;
20
21extern struct device_type iio_device_type;
22
23int __iio_add_chan_devattr(const char *postfix,
24 struct iio_chan_spec const *chan,
25 ssize_t (*func)(struct device *dev,
26 struct device_attribute *attr,
27 char *buf),
28 ssize_t (*writefunc)(struct device *dev,
29 struct device_attribute *attr,
30 const char *buf,
31 size_t len),
32 u64 mask,
33 enum iio_shared_by shared_by,
34 struct device *dev,
35 struct list_head *attr_list);
36void iio_free_chan_devattr_list(struct list_head *attr_list);
37
38ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
39
40/* Event interface flags */
41#define IIO_BUSY_BIT_POS 1
42
43#ifdef CONFIG_IIO_BUFFER
44struct poll_table_struct;
45
46__poll_t iio_buffer_poll(struct file *filp,
47 struct poll_table_struct *wait);
48ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
49 size_t n, loff_t *f_ps);
50
51int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
52void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev);
53
54#define iio_buffer_poll_addr (&iio_buffer_poll)
55#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)
56
57void iio_disable_all_buffers(struct iio_dev *indio_dev);
58void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
59
60#else
61
62#define iio_buffer_poll_addr NULL
63#define iio_buffer_read_first_n_outer_addr NULL
64
65static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
66{
67 return 0;
68}
69
70static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
71
72static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
73static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
74
75#endif
76
77int iio_device_register_eventset(struct iio_dev *indio_dev);
78void iio_device_unregister_eventset(struct iio_dev *indio_dev);
79void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
80int iio_event_getfd(struct iio_dev *indio_dev);
81
82struct iio_event_interface;
83bool iio_event_enabled(const struct iio_event_interface *ev_int);
84
85#endif
86