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 void iio_device_ioctl_handler_register(struct iio_dev *indio_dev,
34 struct iio_ioctl_handler *h);
35 void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h);
36
37 ssize_t do_iio_read_channel_label(struct iio_dev *indio_dev,
38 const struct iio_chan_spec *c,
39 char *buf);
40
41 int __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);
55 void iio_free_chan_devattr_list(struct list_head *attr_list);
56
57 int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
58 const struct attribute_group *group);
59
60 ssize_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
66 struct poll_table_struct;
67
68 __poll_t iio_buffer_poll_wrapper(struct file *filp,
69 struct poll_table_struct *wait);
70 ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf,
71 size_t n, loff_t *f_ps);
72 ssize_t iio_buffer_write_wrapper(struct file *filp, const char __user *buf,
73 size_t n, loff_t *f_ps);
74
75 int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
76 void 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
82 void iio_disable_all_buffers(struct iio_dev *indio_dev);
83 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
84 void 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
iio_buffers_alloc_sysfs_and_mask(struct iio_dev * indio_dev)92 static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
93 {
94 return 0;
95 }
96
iio_buffers_free_sysfs_and_mask(struct iio_dev * indio_dev)97 static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
98
iio_disable_all_buffers(struct iio_dev * indio_dev)99 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
iio_buffer_wakeup_poll(struct iio_dev * indio_dev)100 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
iio_device_detach_buffers(struct iio_dev * indio_dev)101 static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {}
102
103 #endif
104
105 int iio_device_register_eventset(struct iio_dev *indio_dev);
106 void iio_device_unregister_eventset(struct iio_dev *indio_dev);
107 void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
108
109 struct iio_event_interface;
110 bool iio_event_enabled(const struct iio_event_interface *ev_int);
111
112 #endif
113