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 109