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