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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 const 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
33void iio_device_ioctl_handler_register(struct iio_dev *indio_dev,
34 struct iio_ioctl_handler *h);
35void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h);
36
37ssize_t do_iio_read_channel_label(struct iio_dev *indio_dev,
38 const struct iio_chan_spec *c,
39 char *buf);
40
41int __iio_add_chan_devattr(const char *postfix,
42 struct iio_chan_spec const *chan,
43 ssize_t (*func)(struct device *dev,
44 struct device_attribute *attr,
45 char *buf),
46 ssize_t (*writefunc)(struct device *dev,
47 struct device_attribute *attr,
48 const char *buf,
49 size_t len),
50 u64 mask,
51 enum iio_shared_by shared_by,
52 struct device *dev,
53 struct iio_buffer *buffer,
54 struct list_head *attr_list);
55void iio_free_chan_devattr_list(struct list_head *attr_list);
56
57int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
58 const struct attribute_group *group);
59
60ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
61
62/* Event interface flags */
63#define IIO_BUSY_BIT_POS 1
64
65#ifdef CONFIG_IIO_BUFFER
66struct poll_table_struct;
67
68__poll_t iio_buffer_poll_wrapper(struct file *filp,
69 struct poll_table_struct *wait);
70ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf,
71 size_t n, loff_t *f_ps);
72ssize_t iio_buffer_write_wrapper(struct file *filp, const char __user *buf,
73 size_t n, loff_t *f_ps);
74
75int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
76void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev);
77
78#define iio_buffer_poll_addr (&iio_buffer_poll_wrapper)
79#define iio_buffer_read_outer_addr (&iio_buffer_read_wrapper)
80#define iio_buffer_write_outer_addr (&iio_buffer_write_wrapper)
81
82void iio_disable_all_buffers(struct iio_dev *indio_dev);
83void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
84void iio_device_detach_buffers(struct iio_dev *indio_dev);
85
86#else
87
88#define iio_buffer_poll_addr NULL
89#define iio_buffer_read_outer_addr NULL
90#define iio_buffer_write_outer_addr NULL
91
92static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
93{
94 return 0;
95}
96
97static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
98
99static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
100static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
101static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {}
102
103#endif
104
105int iio_device_register_eventset(struct iio_dev *indio_dev);
106void iio_device_unregister_eventset(struct iio_dev *indio_dev);
107void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
108
109struct iio_event_interface;
110bool iio_event_enabled(const struct iio_event_interface *ev_int);
111
112#endif