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_buffer; 16 struct iio_chan_spec; 17 struct iio_dev; 18 19 extern struct device_type iio_device_type; 20 21 struct iio_dev_buffer_pair { 22 struct iio_dev *indio_dev; 23 struct iio_buffer *buffer; 24 }; 25 26 #define IIO_IOCTL_UNHANDLED 1 27 struct 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 33 long iio_device_ioctl(struct iio_dev *indio_dev, struct file *filp, 34 unsigned int cmd, unsigned long arg); 35 36 void iio_device_ioctl_handler_register(struct iio_dev *indio_dev, 37 struct iio_ioctl_handler *h); 38 void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h); 39 40 int __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); 54 void iio_free_chan_devattr_list(struct list_head *attr_list); 55 56 int iio_device_register_sysfs_group(struct iio_dev *indio_dev, 57 const struct attribute_group *group); 58 59 ssize_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 65 struct poll_table_struct; 66 67 __poll_t iio_buffer_poll_wrapper(struct file *filp, 68 struct poll_table_struct *wait); 69 ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf, 70 size_t n, loff_t *f_ps); 71 72 int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev); 73 void 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 78 void iio_disable_all_buffers(struct iio_dev *indio_dev); 79 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); 80 void 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 87 static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev) 88 { 89 return 0; 90 } 91 92 static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {} 93 94 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} 95 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} 96 static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {} 97 98 #endif 99 100 int iio_device_register_eventset(struct iio_dev *indio_dev); 101 void iio_device_unregister_eventset(struct iio_dev *indio_dev); 102 void iio_device_wakeup_eventset(struct iio_dev *indio_dev); 103 104 struct iio_event_interface; 105 bool iio_event_enabled(const struct iio_event_interface *ev_int); 106 107 #endif 108