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 ssize_t do_iio_read_channel_label(struct iio_dev *indio_dev, 38 const struct iio_chan_spec *c, 39 char *buf); 40 41 int __iio_add_chan_devattr(const char *postfix, 42 struct iio_chan_spec const *chan, 43 ssize_t (*func)(struct device *dev, 44 struct device_attribute *attr, 45 char *buf), 46 ssize_t (*writefunc)(struct device *dev, 47 struct device_attribute *attr, 48 const char *buf, 49 size_t len), 50 u64 mask, 51 enum iio_shared_by shared_by, 52 struct device *dev, 53 struct iio_buffer *buffer, 54 struct list_head *attr_list); 55 void iio_free_chan_devattr_list(struct list_head *attr_list); 56 57 int iio_device_register_sysfs_group(struct iio_dev *indio_dev, 58 const struct attribute_group *group); 59 60 ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals); 61 62 /* Event interface flags */ 63 #define IIO_BUSY_BIT_POS 1 64 65 #ifdef CONFIG_IIO_BUFFER 66 struct poll_table_struct; 67 68 __poll_t iio_buffer_poll_wrapper(struct file *filp, 69 struct poll_table_struct *wait); 70 ssize_t iio_buffer_read_wrapper(struct file *filp, char __user *buf, 71 size_t n, loff_t *f_ps); 72 ssize_t iio_buffer_write_wrapper(struct file *filp, const char __user *buf, 73 size_t n, loff_t *f_ps); 74 75 int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev); 76 void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev); 77 78 #define iio_buffer_poll_addr (&iio_buffer_poll_wrapper) 79 #define iio_buffer_read_outer_addr (&iio_buffer_read_wrapper) 80 #define iio_buffer_write_outer_addr (&iio_buffer_write_wrapper) 81 82 void iio_disable_all_buffers(struct iio_dev *indio_dev); 83 void iio_buffer_wakeup_poll(struct iio_dev *indio_dev); 84 void iio_device_detach_buffers(struct iio_dev *indio_dev); 85 86 #else 87 88 #define iio_buffer_poll_addr NULL 89 #define iio_buffer_read_outer_addr NULL 90 #define iio_buffer_write_outer_addr NULL 91 92 static inline int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev) 93 { 94 return 0; 95 } 96 97 static inline void iio_buffers_free_sysfs_and_mask(struct iio_dev *indio_dev) {} 98 99 static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {} 100 static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {} 101 static inline void iio_device_detach_buffers(struct iio_dev *indio_dev) {} 102 103 #endif 104 105 int iio_device_register_eventset(struct iio_dev *indio_dev); 106 void iio_device_unregister_eventset(struct iio_dev *indio_dev); 107 void iio_device_wakeup_eventset(struct iio_dev *indio_dev); 108 109 struct iio_event_interface; 110 bool iio_event_enabled(const struct iio_event_interface *ev_int); 111 112 #endif 113