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
15 struct iio_buffer;
16 struct iio_chan_spec;
17 struct iio_dev;
18
19 extern const struct device_type iio_device_type;
20
21 struct iio_dev_buffer_pair {
22 struct iio_dev *indio_dev;
23 struct iio_buffer *buffer;
24 };
25
26 #define IIO_IOCTL_UNHANDLED 1
27 struct 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
33 long iio_device_ioctl(struct iio_dev *indio_dev, struct file *filp,
34 unsigned int cmd, unsigned long arg);
35
36 void iio_device_ioctl_handler_register(struct iio_dev *indio_dev,
37 struct iio_ioctl_handler *h);
38 void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h);
39
40 int __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);
54 void iio_free_chan_devattr_list(struct list_head *attr_list);
55
56 int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
57 const struct attribute_group *group);
58
59 ssize_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
65 struct poll_table_struct;
66
67 __poll_t iio_buffer_poll_wrapper(struct file *filp,
68 struct poll_table_struct *wait);
69 ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf,
70 size_t n, loff_t *f_ps);
71 ssize_t iio_buffer_write_wrapper(struct file *filp, const char __user *buf,
72 size_t n, loff_t *f_ps);
73
74 int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
75 void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev);
76
77 #define iio_buffer_poll_addr (&iio_buffer_poll_wrapper)
78 #define iio_buffer_read_outer_addr (&iio_buffer_read_wrapper)
79 #define iio_buffer_write_outer_addr (&iio_buffer_write_wrapper)
80
81 void iio_disable_all_buffers(struct iio_dev *indio_dev);
82 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
83 void iio_device_detach_buffers(struct iio_dev *indio_dev);
84
85 #else
86
87 #define iio_buffer_poll_addr NULL
88 #define iio_buffer_read_outer_addr NULL
89 #define iio_buffer_write_outer_addr NULL
90
iio_buffers_alloc_sysfs_and_mask(struct iio_dev * indio_dev)91 static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
92 {
93 return 0;
94 }
95
iio_buffers_free_sysfs_and_mask(struct iio_dev * indio_dev)96 static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
97
iio_disable_all_buffers(struct iio_dev * indio_dev)98 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
iio_buffer_wakeup_poll(struct iio_dev * indio_dev)99 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
iio_device_detach_buffers(struct iio_dev * indio_dev)100 static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {}
101
102 #endif
103
104 int iio_device_register_eventset(struct iio_dev *indio_dev);
105 void iio_device_unregister_eventset(struct iio_dev *indio_dev);
106 void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
107
108 struct iio_event_interface;
109 bool iio_event_enabled(const struct iio_event_interface *ev_int);
110
111 #endif
112