*/
#include <linux/kernel.h>
#include <linux/device.h>
-#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/poll.h>
-#include <linux/module.h>
#include <linux/cdev.h>
#include <linux/slab.h>
EXPORT_SYMBOL(iio_push_or_escallate_ring_event);
/**
- * iio_ring_open() chrdev file open for ring buffer access
+ * iio_ring_open() - chrdev file open for ring buffer access
*
* This function relies on all ring buffer implementations having an
* iio_ring_buffer as their first element.
}
/**
- * iio_ring_release() -chrdev file close ring buffer access
+ * iio_ring_release() - chrdev file close ring buffer access
*
* This function relies on all ring buffer implementations having an
* iio_ring_buffer as their first element.
}
/**
- * iio_ring_rip_outer() chrdev read for ring buffer access
+ * iio_ring_rip_outer() - chrdev read for ring buffer access
*
* This function relies on all ring buffer implementations having an
* iio_ring _bufer as their first element.
};
/**
- * __iio_request_ring_buffer_event_chrdev() allocate ring event chrdev
+ * __iio_request_ring_buffer_event_chrdev() - allocate ring event chrdev
* @buf: ring buffer whose event chrdev we are allocating
+ * @id: id of this ring buffer (typically 0)
* @owner: the module who owns the ring buffer (for ref counting)
* @dev: device with which the chrdev is associated
**/
#ifdef CONFIG_IIO_RING_BUFFER
-struct iio_handler;
struct iio_ring_buffer;
-struct iio_dev;
/**
* iio_push_ring_event() - ring buffer specific push to event chrdev
* change.
* @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_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 ring
* @set_length: set number of datums in ring
* @is_enabled: query if ring is currently being used
* @id: unique id number
* @access_id: device id number
* @length: [DEVICE] number of datums in ring
- * @bytes_per_datum [DEVICE] size of individual datum including timestamp
+ * @bytes_per_datum: [DEVICE] size of individual datum including timestamp
* @bpe: [DEVICE] size of individual channel value
* @loopcount: [INTERN] number of times the ring has looped
* @scan_el_attrs: [DRIVER] control of scan elements if that scan mode
int (*postdisable)(struct iio_dev *);
};
+
+/**
+ * iio_ring_buffer_init() - Initialize the buffer structure
+ * @ring: buffer to be initialized
+ * @dev_info: the iio device the buffer is assocated with
+ **/
void iio_ring_buffer_init(struct iio_ring_buffer *ring,
struct iio_dev *dev_info);
ssize_t iio_scan_el_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t len);
/**
- * iio_scal_el_show() - sysfs interface to query whether a scan element is
+ * iio_scan_el_show() - sysfs interface to query whether a scan element
* is enabled or not
* @dev: the target device
* @attr: the device attribute that is being processed
ssize_t iio_scan_el_show(struct device *dev, struct device_attribute *attr,
char *buf);
+/**
+ * iio_scan_el_ts_store() - sysfs interface to set whether a timestamp is included
+ * in the scan.
+ **/
ssize_t iio_scan_el_ts_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t len);
-
+/**
+ * iio_scan_el_ts_show() - sysfs interface to query if a timestamp is included
+ * in the scan.
+ **/
ssize_t iio_scan_el_ts_show(struct device *dev, struct device_attribute *attr,
char *buf);
/**
__IIO_SCAN_NAMED_EL_C(_name, _string, _number, _bits, _label, _cf)
/**
* IIO_SCAN_EL_TIMESTAMP - declare a special scan element for timestamps
+ * @number: specify where in the scan order this is stored.
*
* Odd one out. Handled slightly differently from other scan elements.
**/
return !!(mask & (1 << bit));
};
+/**
+ * iio_scan_mask_set() - set particular bit in the scan mask
+ * @ring: the ring buffer whose scan mask we are interested in
+ * @bit: the bit to be set.
+ **/
static inline int iio_scan_mask_set(struct iio_ring_buffer *ring, int bit)
{
struct iio_dev *dev_info = ring->indio_dev;
return 0;
};
+/**
+ * iio_scan_mask_clear() - clear a particular element from the scan mask
+ * @ring: the ring buffer whose scan mask we are interested in
+ * @bit: the bit to clear
+ **/
static inline int iio_scan_mask_clear(struct iio_ring_buffer *ring, int bit)
{
if (bit > IIO_MAX_SCAN_LENGTH)
/**
* iio_scan_mask_count_to_right() - how many scan elements occur before here
- * @dev_info: the iio_device whose scan mode we are querying
+ * @ring: the ring buffer whose scan mask we interested in
* @bit: which number scan element is this
**/
static inline int iio_scan_mask_count_to_right(struct iio_ring_buffer *ring,
return count;
}
-
+/**
+ * iio_put_ring_buffer() - notify done with buffer
+ * @ring: the buffer we are done with.
+ **/
static inline void iio_put_ring_buffer(struct iio_ring_buffer *ring)
{
put_device(&ring->dev);
container_of(d, struct iio_ring_buffer, dev)
#define access_dev_to_iio_ring_buffer(d) \
container_of(d, struct iio_ring_buffer, access_dev)
+
+/**
+ * iio_ring_buffer_register() - register the buffer with IIO core
+ * @ring: the buffer to be registered
+ * @id: the id of the buffer (typically 0)
+ **/
int iio_ring_buffer_register(struct iio_ring_buffer *ring, int id);
+
+/**
+ * iio_ring_buffer_unregister() - unregister the buffer from IIO core
+ * @ring: the buffer to be unregistered
+ **/
void iio_ring_buffer_unregister(struct iio_ring_buffer *ring);
+/**
+ * iio_read_ring_length() - attr func to get number of datums in the buffer
+ **/
ssize_t iio_read_ring_length(struct device *dev,
struct device_attribute *attr,
char *buf);
+/**
+ * iio_write_ring_length() - attr func to set number of datums in the buffer
+ **/
ssize_t iio_write_ring_length(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t len);
+/**
+ * iio_read_ring_bytes_per_datum() - attr for number of bytes in whole datum
+ **/
ssize_t iio_read_ring_bytes_per_datum(struct device *dev,
struct device_attribute *attr,
char *buf);
+/**
+ * iio_store_ring_enable() - attr to turn the buffer on
+ **/
ssize_t iio_store_ring_enable(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t len);
+/**
+ * iio_show_ring_enable() - attr to see if the buffer is on
+ **/
ssize_t iio_show_ring_enable(struct device *dev,
struct device_attribute *attr,
char *buf);
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / commitdiff