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-rw-r--r--drivers/staging/iio/buffer.h193
1 files changed, 0 insertions, 193 deletions
diff --git a/drivers/staging/iio/buffer.h b/drivers/staging/iio/buffer.h
deleted file mode 100644
index df2046dcb623..000000000000
--- a/drivers/staging/iio/buffer.h
+++ /dev/null
@@ -1,193 +0,0 @@
-/* The industrial I/O core - generic buffer interfaces.
- *
- * 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.
- */
-
-#ifndef _IIO_BUFFER_GENERIC_H_
-#define _IIO_BUFFER_GENERIC_H_
-#include <linux/sysfs.h>
-#include "iio.h"
-
-#ifdef CONFIG_IIO_BUFFER
-
-struct iio_buffer;
-
-/**
- * struct iio_buffer_access_funcs - access functions for buffers.
- * @store_to: actually store stuff to the buffer
- * @read_first_n: try to get a specified number of bytes (must exist)
- * @request_update: if a parameter change has been marked, update underlying
- * storage.
- * @get_bytes_per_datum:get current bytes per datum
- * @set_bytes_per_datum:set number of bytes per datum
- * @get_length: get number of datums in buffer
- * @set_length: set number of datums in buffer
- *
- * The purpose of this structure is to make the buffer element
- * modular as event for a given driver, different usecases may require
- * different buffer designs (space efficiency vs speed for example).
- *
- * It is worth noting that a given buffer implementation may only support a
- * small proportion of these functions. The core code 'should' cope fine with
- * any of them not existing.
- **/
-struct iio_buffer_access_funcs {
- int (*store_to)(struct iio_buffer *buffer, u8 *data, s64 timestamp);
- int (*read_first_n)(struct iio_buffer *buffer,
- size_t n,
- char __user *buf);
-
- int (*request_update)(struct iio_buffer *buffer);
-
- int (*get_bytes_per_datum)(struct iio_buffer *buffer);
- int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd);
- int (*get_length)(struct iio_buffer *buffer);
- int (*set_length)(struct iio_buffer *buffer, int length);
-};
-
-/**
- * struct iio_buffer - general buffer structure
- * @length: [DEVICE] number of datums in buffer
- * @bytes_per_datum: [DEVICE] size of individual datum including timestamp
- * @scan_el_attrs: [DRIVER] control of scan elements if that scan mode
- * control method is used
- * @scan_mask: [INTERN] bitmask used in masking scan mode elements
- * @scan_index_timestamp:[INTERN] cache of the index to the timestamp
- * @scan_timestamp: [INTERN] does the scan mode include a timestamp
- * @access: [DRIVER] buffer access functions associated with the
- * implementation.
- * @scan_el_dev_attr_list:[INTERN] list of scan element related attributes.
- * @scan_el_group: [DRIVER] attribute group for those attributes not
- * created from the iio_chan_info array.
- * @pollq: [INTERN] wait queue to allow for polling on the buffer.
- * @stufftoread: [INTERN] flag to indicate new data.
- * @demux_list: [INTERN] list of operations required to demux the scan.
- * @demux_bounce: [INTERN] buffer for doing gather from incoming scan.
- **/
-struct iio_buffer {
- int length;
- int bytes_per_datum;
- struct attribute_group *scan_el_attrs;
- long *scan_mask;
- bool scan_timestamp;
- unsigned scan_index_timestamp;
- const struct iio_buffer_access_funcs *access;
- struct list_head scan_el_dev_attr_list;
- struct attribute_group scan_el_group;
- wait_queue_head_t pollq;
- bool stufftoread;
- const struct attribute_group *attrs;
- struct list_head demux_list;
- unsigned char *demux_bounce;
-};
-
-/**
- * iio_buffer_init() - Initialize the buffer structure
- * @buffer: buffer to be initialized
- **/
-void iio_buffer_init(struct iio_buffer *buffer);
-
-/**
- * __iio_update_buffer() - update common elements of buffers
- * @buffer: buffer that is the event source
- * @bytes_per_datum: size of individual datum including timestamp
- * @length: number of datums in buffer
- **/
-static inline void __iio_update_buffer(struct iio_buffer *buffer,
- int bytes_per_datum, int length)
-{
- buffer->bytes_per_datum = bytes_per_datum;
- buffer->length = length;
-}
-
-int iio_scan_mask_query(struct iio_dev *indio_dev,
- struct iio_buffer *buffer, int bit);
-
-/**
- * iio_scan_mask_set() - set particular bit in the scan mask
- * @buffer: the buffer whose scan mask we are interested in
- * @bit: the bit to be set.
- **/
-int iio_scan_mask_set(struct iio_dev *indio_dev,
- struct iio_buffer *buffer, int bit);
-
-/**
- * iio_push_to_buffer() - push to a registered buffer.
- * @buffer: IIO buffer structure for device
- * @scan: Full scan.
- * @timestamp:
- */
-int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
- s64 timestamp);
-
-int iio_update_demux(struct iio_dev *indio_dev);
-
-/**
- * iio_buffer_register() - register the buffer with IIO core
- * @indio_dev: device with the buffer to be registered
- **/
-int iio_buffer_register(struct iio_dev *indio_dev,
- const struct iio_chan_spec *channels,
- int num_channels);
-
-/**
- * iio_buffer_unregister() - unregister the buffer from IIO core
- * @indio_dev: the device with the buffer to be unregistered
- **/
-void iio_buffer_unregister(struct iio_dev *indio_dev);
-
-/**
- * iio_buffer_read_length() - attr func to get number of datums in the buffer
- **/
-ssize_t iio_buffer_read_length(struct device *dev,
- struct device_attribute *attr,
- char *buf);
-/**
- * iio_buffer_write_length() - attr func to set number of datums in the buffer
- **/
-ssize_t iio_buffer_write_length(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len);
-/**
- * iio_buffer_store_enable() - attr to turn the buffer on
- **/
-ssize_t iio_buffer_store_enable(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len);
-/**
- * iio_buffer_show_enable() - attr to see if the buffer is on
- **/
-ssize_t iio_buffer_show_enable(struct device *dev,
- struct device_attribute *attr,
- char *buf);
-#define IIO_BUFFER_LENGTH_ATTR DEVICE_ATTR(length, S_IRUGO | S_IWUSR, \
- iio_buffer_read_length, \
- iio_buffer_write_length)
-
-#define IIO_BUFFER_ENABLE_ATTR DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, \
- iio_buffer_show_enable, \
- iio_buffer_store_enable)
-
-int iio_sw_buffer_preenable(struct iio_dev *indio_dev);
-
-#else /* CONFIG_IIO_BUFFER */
-
-static inline int iio_buffer_register(struct iio_dev *indio_dev,
- struct iio_chan_spec *channels,
- int num_channels)
-{
- return 0;
-}
-
-static inline void iio_buffer_unregister(struct iio_dev *indio_dev)
-{};
-
-#endif /* CONFIG_IIO_BUFFER */
-
-#endif /* _IIO_BUFFER_GENERIC_H_ */