LXR linux/drivers/iio/iio

   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
 108