tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/* The industrial I/O core function defs.
3 *
4 * Copyright (c) 2008 Jonathan Cameron
5 *
6 * These definitions are meant for use only within the IIO core, not individual
7 * drivers.
8 */
9
10#ifndef _IIO_CORE_H_
11#define _IIO_CORE_H_
12#include <linux/kernel.h>
13#include <linux/device.h>
14
15struct iio_buffer;
16struct iio_chan_spec;
17struct iio_dev;
18
19extern struct device_type iio_device_type;
20
21struct iio_dev_buffer_pair {
22 struct iio_dev *indio_dev;
23 struct iio_buffer *buffer;
24};
25
26#define IIO_IOCTL_UNHANDLED 1
27struct iio_ioctl_handler {
28 struct list_head entry;
29 long (*ioctl)(struct iio_dev *indio_dev, struct file *filp,
30 unsigned int cmd, unsigned long arg);
31};
32
33long iio_device_ioctl(struct iio_dev *indio_dev, struct file *filp,
34 unsigned int cmd, unsigned long arg);
35
36void iio_device_ioctl_handler_register(struct iio_dev *indio_dev,
37 struct iio_ioctl_handler *h);
38void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h);
39
40int __iio_add_chan_devattr(const char *postfix,
41 struct iio_chan_spec const *chan,
42 ssize_t (*func)(struct device *dev,
43 struct device_attribute *attr,
44 char *buf),
45 ssize_t (*writefunc)(struct device *dev,
46 struct device_attribute *attr,
47 const char *buf,
48 size_t len),
49 u64 mask,
50 enum iio_shared_by shared_by,
51 struct device *dev,
52 struct iio_buffer *buffer,
53 struct list_head *attr_list);
54void iio_free_chan_devattr_list(struct list_head *attr_list);
55
56int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
57 const struct attribute_group *group);
58
59ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
60
61/* Event interface flags */
62#define IIO_BUSY_BIT_POS 1
63
64#ifdef CONFIG_IIO_BUFFER
65struct poll_table_struct;
66
67__poll_t iio_buffer_poll_wrapper(struct file *filp,
68 struct poll_table_struct *wait);
69ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf,
70 size_t n, loff_t *f_ps);
71
72int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
73void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev);
74
75#define iio_buffer_poll_addr (&iio_buffer_poll_wrapper)
76#define iio_buffer_read_outer_addr (&iio_buffer_read_wrapper)
77
78void iio_disable_all_buffers(struct iio_dev *indio_dev);
79void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
80void iio_device_detach_buffers(struct iio_dev *indio_dev);
81
82#else
83
84#define iio_buffer_poll_addr NULL
85#define iio_buffer_read_outer_addr NULL
86
87static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
88{
89 return 0;
90}
91
92static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
93
94static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
95static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
96static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {}
97
98#endif
99
100int iio_device_register_eventset(struct iio_dev *indio_dev);
101void iio_device_unregister_eventset(struct iio_dev *indio_dev);
102void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
103
104struct iio_event_interface;
105bool iio_event_enabled(const struct iio_event_interface *ev_int);
106
107#endif