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 const 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 void iio_device_ioctl_handler_register(struct iio_dev *indio_dev, 34 struct iio_ioctl_handler *h); 35 void iio_device_ioctl_handler_unregister(struct iio_ioctl_handler *h); 36 37 int __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); 51 void iio_free_chan_devattr_list(struct list_head *attr_list); 52 53 int iio_device_register_sysfs_group(struct iio_dev *indio_dev, 54 const struct attribute_group *group); 55 56 ssize_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 62 struct poll_table_struct; 63 64 __poll_t iio_buffer_poll_wrapper(struct file *filp, 65 struct poll_table_struct *wait); 66 ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf, 67 size_t n, loff_t *f_ps); 68 ssize_t iio_buffer_write_wrapper(struct file *filp, const char __user *buf, 69 size_t n, loff_t *f_ps); 70 71 int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev); 72 void 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 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 #define iio_buffer_write_outer_addr NULL 87 88 static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev) 89 { 90 return 0; 91 } 92 93 static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {} 94 95 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} 96 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} 97 static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {} 98 99 #endif 100 101 int iio_device_register_eventset(struct iio_dev *indio_dev); 102 void iio_device_unregister_eventset(struct iio_dev *indio_dev); 103 void iio_device_wakeup_eventset(struct iio_dev *indio_dev); 104 105 struct iio_event_interface; 106 bool iio_event_enabled(const struct iio_event_interface *ev_int); 107 108 #endif 109