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_chan_spec; 16 struct iio_dev; 17 18 extern struct device_type iio_device_type; 19 20 #define IIO_IOCTL_UNHANDLED 1 21 struct iio_ioctl_handler { 22 struct list_head entry; 23 long (*ioctl)(struct iio_dev *indio_dev, struct file *filp, 24 unsigned int cmd, unsigned long arg); 25 }; 26 27 long iio_device_ioctl(struct iio_dev *indio_dev, struct file *filp, 28 unsigned int cmd, unsigned long arg); 29 30 void iio_device_ioctl_handler_register(struct iio_dev *indio_dev, 31 struct iio_ioctl_handler *h); 32 void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h); 33 34 int __iio_add_chan_devattr(const char *postfix, 35 struct iio_chan_spec const *chan, 36 ssize_t (*func)(struct device *dev, 37 struct device_attribute *attr, 38 char *buf), 39 ssize_t (*writefunc)(struct device *dev, 40 struct device_attribute *attr, 41 const char *buf, 42 size_t len), 43 u64 mask, 44 enum iio_shared_by shared_by, 45 struct device *dev, 46 struct list_head *attr_list); 47 void iio_free_chan_devattr_list(struct list_head *attr_list); 48 49 ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals); 50 51 /* Event interface flags */ 52 #define IIO_BUSY_BIT_POS 1 53 54 #ifdef CONFIG_IIO_BUFFER 55 struct poll_table_struct; 56 57 __poll_t iio_buffer_poll(struct file *filp, 58 struct poll_table_struct *wait); 59 ssize_t iio_buffer_read_outer(struct file *filp, char __user *buf, 60 size_t n, loff_t *f_ps); 61 62 int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev); 63 void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev); 64 65 #define iio_buffer_poll_addr (&iio_buffer_poll) 66 #define iio_buffer_read_outer_addr (&iio_buffer_read_outer) 67 68 void iio_disable_all_buffers(struct iio_dev *indio_dev); 69 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); 70 71 #else 72 73 #define iio_buffer_poll_addr NULL 74 #define iio_buffer_read_outer_addr NULL 75 76 static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) 77 { 78 return 0; 79 } 80 81 static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {} 82 83 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} 84 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} 85 86 #endif 87 88 int iio_device_register_eventset(struct iio_dev *indio_dev); 89 void iio_device_unregister_eventset(struct iio_dev *indio_dev); 90 void iio_device_wakeup_eventset(struct iio_dev *indio_dev); 91 92 struct iio_event_interface; 93 bool iio_event_enabled(const struct iio_event_interface *ev_int); 94 95 #endif 96