1 /* The industrial I/O core function defs. 2 * 3 * Copyright (c) 2008 Jonathan Cameron 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 * 9 * These definitions are meant for use only within the IIO core, not individual 10 * drivers. 11 */ 12 13 #ifndef _IIO_CORE_H_ 14 #define _IIO_CORE_H_ 15 #include <linux/kernel.h> 16 #include <linux/device.h> 17 18 struct iio_chan_spec; 19 struct iio_dev; 20 21 extern struct device_type iio_device_type; 22 23 int __iio_add_chan_devattr(const char *postfix, 24 struct iio_chan_spec const *chan, 25 ssize_t (*func)(struct device *dev, 26 struct device_attribute *attr, 27 char *buf), 28 ssize_t (*writefunc)(struct device *dev, 29 struct device_attribute *attr, 30 const char *buf, 31 size_t len), 32 u64 mask, 33 enum iio_shared_by shared_by, 34 struct device *dev, 35 struct list_head *attr_list); 36 void iio_free_chan_devattr_list(struct list_head *attr_list); 37 38 ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals); 39 40 /* Event interface flags */ 41 #define IIO_BUSY_BIT_POS 1 42 43 #ifdef CONFIG_IIO_BUFFER 44 struct poll_table_struct; 45 46 unsigned int iio_buffer_poll(struct file *filp, 47 struct poll_table_struct *wait); 48 ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf, 49 size_t n, loff_t *f_ps); 50 51 int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev); 52 void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev); 53 54 #define iio_buffer_poll_addr (&iio_buffer_poll) 55 #define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer) 56 57 void iio_disable_all_buffers(struct iio_dev *indio_dev); 58 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); 59 60 #else 61 62 #define iio_buffer_poll_addr NULL 63 #define iio_buffer_read_first_n_outer_addr NULL 64 65 static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) 66 { 67 return 0; 68 } 69 70 static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {} 71 72 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} 73 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} 74 75 #endif 76 77 int iio_device_register_eventset(struct iio_dev *indio_dev); 78 void iio_device_unregister_eventset(struct iio_dev *indio_dev); 79 void iio_device_wakeup_eventset(struct iio_dev *indio_dev); 80 int iio_event_getfd(struct iio_dev *indio_dev); 81 82 #endif 83