[deliverable/linux.git] / drivers / iio / iio_core.h

/* The industrial I/O core function defs.
 *
 * Copyright (c) 2008 Jonathan Cameron
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * These definitions are meant for use only within the IIO core, not individual
 * drivers.
 */

#ifndef _IIO_CORE_H_
#define _IIO_CORE_H_
#include <linux/kernel.h>
#include <linux/device.h>

struct iio_chan_spec;
struct iio_dev;

extern struct device_type iio_device_type;

int __iio_add_chan_devattr(const char *postfix,
			   struct iio_chan_spec const *chan,
			   ssize_t (*func)(struct device *dev,
					   struct device_attribute *attr,
					   char *buf),
			   ssize_t (*writefunc)(struct device *dev,
						struct device_attribute *attr,
						const char *buf,
						size_t len),
			   u64 mask,
			   enum iio_shared_by shared_by,
			   struct device *dev,
			   struct list_head *attr_list);
void iio_free_chan_devattr_list(struct list_head *attr_list);

ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);

/* Event interface flags */
#define IIO_BUSY_BIT_POS 1

#ifdef CONFIG_IIO_BUFFER
struct poll_table_struct;

unsigned int iio_buffer_poll(struct file *filp,
			     struct poll_table_struct *wait);
ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
				      size_t n, loff_t *f_ps);

int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev);

#define iio_buffer_poll_addr (&iio_buffer_poll)
#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)

void iio_disable_all_buffers(struct iio_dev *indio_dev);
void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);

#else

#define iio_buffer_poll_addr NULL
#define iio_buffer_read_first_n_outer_addr NULL

static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
{
	return 0;
}

static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {}

static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}

#endif

int iio_device_register_eventset(struct iio_dev *indio_dev);
void iio_device_unregister_eventset(struct iio_dev *indio_dev);
void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
int iio_event_getfd(struct iio_dev *indio_dev);

#endif
Commit	Line	Data
	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