767 lines
26 KiB
C
767 lines
26 KiB
C
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/* The industrial I/O core
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*
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* Copyright (c) 2008 Jonathan Cameron
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#ifndef _INDUSTRIAL_IO_H_
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#define _INDUSTRIAL_IO_H_
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#include <linux/device.h>
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#include <linux/cdev.h>
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#include <linux/iio/types.h>
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#include <linux/of.h>
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/* IIO TODO LIST */
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/*
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* Provide means of adjusting timer accuracy.
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* Currently assumes nano seconds.
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*/
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enum iio_shared_by {
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IIO_SEPARATE,
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IIO_SHARED_BY_TYPE,
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IIO_SHARED_BY_DIR,
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IIO_SHARED_BY_ALL
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};
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enum iio_endian {
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IIO_CPU,
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IIO_BE,
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IIO_LE,
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};
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struct iio_chan_spec;
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struct iio_dev;
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/**
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* struct iio_chan_spec_ext_info - Extended channel info attribute
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* @name: Info attribute name
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* @shared: Whether this attribute is shared between all channels.
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* @read: Read callback for this info attribute, may be NULL.
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* @write: Write callback for this info attribute, may be NULL.
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* @private: Data private to the driver.
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*/
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struct iio_chan_spec_ext_info {
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const char *name;
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enum iio_shared_by shared;
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ssize_t (*read)(struct iio_dev *, uintptr_t private,
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struct iio_chan_spec const *, char *buf);
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ssize_t (*write)(struct iio_dev *, uintptr_t private,
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struct iio_chan_spec const *, const char *buf,
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size_t len);
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uintptr_t private;
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};
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/**
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* struct iio_enum - Enum channel info attribute
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* @items: An array of strings.
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* @num_items: Length of the item array.
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* @set: Set callback function, may be NULL.
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* @get: Get callback function, may be NULL.
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*
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* The iio_enum struct can be used to implement enum style channel attributes.
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* Enum style attributes are those which have a set of strings which map to
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* unsigned integer values. The IIO enum helper code takes care of mapping
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* between value and string as well as generating a "_available" file which
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* contains a list of all available items. The set callback will be called when
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* the attribute is updated. The last parameter is the index to the newly
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* activated item. The get callback will be used to query the currently active
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* item and is supposed to return the index for it.
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*/
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struct iio_enum {
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const char * const *items;
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unsigned int num_items;
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int (*set)(struct iio_dev *, const struct iio_chan_spec *, unsigned int);
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int (*get)(struct iio_dev *, const struct iio_chan_spec *);
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};
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ssize_t iio_enum_available_read(struct iio_dev *indio_dev,
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uintptr_t priv, const struct iio_chan_spec *chan, char *buf);
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ssize_t iio_enum_read(struct iio_dev *indio_dev,
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uintptr_t priv, const struct iio_chan_spec *chan, char *buf);
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ssize_t iio_enum_write(struct iio_dev *indio_dev,
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uintptr_t priv, const struct iio_chan_spec *chan, const char *buf,
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size_t len);
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/**
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* IIO_ENUM() - Initialize enum extended channel attribute
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* @_name: Attribute name
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* @_shared: Whether the attribute is shared between all channels
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* @_e: Pointer to an iio_enum struct
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*
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* This should usually be used together with IIO_ENUM_AVAILABLE()
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*/
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#define IIO_ENUM(_name, _shared, _e) \
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{ \
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.name = (_name), \
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.shared = (_shared), \
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.read = iio_enum_read, \
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.write = iio_enum_write, \
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.private = (uintptr_t)(_e), \
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}
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/**
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* IIO_ENUM_AVAILABLE() - Initialize enum available extended channel attribute
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* @_name: Attribute name ("_available" will be appended to the name)
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* @_e: Pointer to an iio_enum struct
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*
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* Creates a read only attribute which lists all the available enum items in a
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* space separated list. This should usually be used together with IIO_ENUM()
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*/
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#define IIO_ENUM_AVAILABLE(_name, _e) \
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{ \
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.name = (_name "_available"), \
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.shared = IIO_SHARED_BY_TYPE, \
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.read = iio_enum_available_read, \
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.private = (uintptr_t)(_e), \
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}
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/**
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* struct iio_mount_matrix - iio mounting matrix
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* @rotation: 3 dimensional space rotation matrix defining sensor alignment with
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* main hardware
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*/
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struct iio_mount_matrix {
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const char *rotation[9];
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};
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ssize_t iio_show_mount_matrix(struct iio_dev *indio_dev, uintptr_t priv,
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const struct iio_chan_spec *chan, char *buf);
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int of_iio_read_mount_matrix(const struct device *dev, const char *propname,
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struct iio_mount_matrix *matrix);
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typedef const struct iio_mount_matrix *
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(iio_get_mount_matrix_t)(const struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan);
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/**
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* IIO_MOUNT_MATRIX() - Initialize mount matrix extended channel attribute
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* @_shared: Whether the attribute is shared between all channels
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* @_get: Pointer to an iio_get_mount_matrix_t accessor
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*/
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#define IIO_MOUNT_MATRIX(_shared, _get) \
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{ \
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.name = "mount_matrix", \
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.shared = (_shared), \
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.read = iio_show_mount_matrix, \
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.private = (uintptr_t)(_get), \
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}
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/**
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* struct iio_event_spec - specification for a channel event
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* @type: Type of the event
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* @dir: Direction of the event
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* @mask_separate: Bit mask of enum iio_event_info values. Attributes
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* set in this mask will be registered per channel.
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* @mask_shared_by_type: Bit mask of enum iio_event_info values. Attributes
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* set in this mask will be shared by channel type.
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* @mask_shared_by_dir: Bit mask of enum iio_event_info values. Attributes
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* set in this mask will be shared by channel type and
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* direction.
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* @mask_shared_by_all: Bit mask of enum iio_event_info values. Attributes
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* set in this mask will be shared by all channels.
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*/
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struct iio_event_spec {
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enum iio_event_type type;
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enum iio_event_direction dir;
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unsigned long mask_separate;
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unsigned long mask_shared_by_type;
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unsigned long mask_shared_by_dir;
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unsigned long mask_shared_by_all;
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};
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/**
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* struct iio_chan_spec - specification of a single channel
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* @type: What type of measurement is the channel making.
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* @channel: What number do we wish to assign the channel.
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* @channel2: If there is a second number for a differential
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* channel then this is it. If modified is set then the
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* value here specifies the modifier.
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* @address: Driver specific identifier.
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* @scan_index: Monotonic index to give ordering in scans when read
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* from a buffer.
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* @scan_type: struct describing the scan type
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* @scan_type.sign: 's' or 'u' to specify signed or unsigned
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* @scan_type.realbits: Number of valid bits of data
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* @scan_type.storagebits: Realbits + padding
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* @scan_type.shift: Shift right by this before masking out
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* realbits.
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* @scan_type.repeat: Number of times real/storage bits repeats.
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* When the repeat element is more than 1, then
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* the type element in sysfs will show a repeat
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* value. Otherwise, the number of repetitions
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* is omitted.
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* @scan_type.endianness: little or big endian
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* @info_mask_separate: What information is to be exported that is specific to
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* this channel.
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* @info_mask_separate_available: What availability information is to be
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* exported that is specific to this channel.
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* @info_mask_shared_by_type: What information is to be exported that is shared
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* by all channels of the same type.
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* @info_mask_shared_by_type_available: What availability information is to be
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* exported that is shared by all channels of the same
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* type.
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* @info_mask_shared_by_dir: What information is to be exported that is shared
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* by all channels of the same direction.
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* @info_mask_shared_by_dir_available: What availability information is to be
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* exported that is shared by all channels of the same
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* direction.
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* @info_mask_shared_by_all: What information is to be exported that is shared
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* by all channels.
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* @info_mask_shared_by_all_available: What availability information is to be
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* exported that is shared by all channels.
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* @event_spec: Array of events which should be registered for this
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* channel.
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* @num_event_specs: Size of the event_spec array.
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* @ext_info: Array of extended info attributes for this channel.
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* The array is NULL terminated, the last element should
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* have its name field set to NULL.
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* @extend_name: Allows labeling of channel attributes with an
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* informative name. Note this has no effect codes etc,
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* unlike modifiers.
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* @datasheet_name: A name used in in-kernel mapping of channels. It should
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* correspond to the first name that the channel is referred
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* to by in the datasheet (e.g. IND), or the nearest
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* possible compound name (e.g. IND-INC).
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* @modified: Does a modifier apply to this channel. What these are
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* depends on the channel type. Modifier is set in
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* channel2. Examples are IIO_MOD_X for axial sensors about
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* the 'x' axis.
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* @indexed: Specify the channel has a numerical index. If not,
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* the channel index number will be suppressed for sysfs
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* attributes but not for event codes.
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* @output: Channel is output.
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* @differential: Channel is differential.
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*/
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struct iio_chan_spec {
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enum iio_chan_type type;
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int channel;
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int channel2;
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unsigned long address;
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int scan_index;
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struct {
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char sign;
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u8 realbits;
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u8 storagebits;
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u8 shift;
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u8 repeat;
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enum iio_endian endianness;
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} scan_type;
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long info_mask_separate;
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long info_mask_separate_available;
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long info_mask_shared_by_type;
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long info_mask_shared_by_type_available;
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long info_mask_shared_by_dir;
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long info_mask_shared_by_dir_available;
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long info_mask_shared_by_all;
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long info_mask_shared_by_all_available;
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const struct iio_event_spec *event_spec;
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unsigned int num_event_specs;
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const struct iio_chan_spec_ext_info *ext_info;
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const char *extend_name;
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const char *datasheet_name;
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unsigned modified:1;
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unsigned indexed:1;
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unsigned output:1;
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unsigned differential:1;
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};
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/**
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* iio_channel_has_info() - Checks whether a channel supports a info attribute
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* @chan: The channel to be queried
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* @type: Type of the info attribute to be checked
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*
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* Returns true if the channels supports reporting values for the given info
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* attribute type, false otherwise.
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*/
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static inline bool iio_channel_has_info(const struct iio_chan_spec *chan,
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enum iio_chan_info_enum type)
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{
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return (chan->info_mask_separate & BIT(type)) |
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(chan->info_mask_shared_by_type & BIT(type)) |
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(chan->info_mask_shared_by_dir & BIT(type)) |
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(chan->info_mask_shared_by_all & BIT(type));
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}
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/**
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* iio_channel_has_available() - Checks if a channel has an available attribute
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* @chan: The channel to be queried
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* @type: Type of the available attribute to be checked
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*
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* Returns true if the channel supports reporting available values for the
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* given attribute type, false otherwise.
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*/
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static inline bool iio_channel_has_available(const struct iio_chan_spec *chan,
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enum iio_chan_info_enum type)
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{
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return (chan->info_mask_separate_available & BIT(type)) |
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(chan->info_mask_shared_by_type_available & BIT(type)) |
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(chan->info_mask_shared_by_dir_available & BIT(type)) |
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(chan->info_mask_shared_by_all_available & BIT(type));
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}
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#define IIO_CHAN_SOFT_TIMESTAMP(_si) { \
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.type = IIO_TIMESTAMP, \
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.channel = -1, \
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.scan_index = _si, \
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.scan_type = { \
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.sign = 's', \
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.realbits = 64, \
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.storagebits = 64, \
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}, \
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}
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s64 iio_get_time_ns(const struct iio_dev *indio_dev);
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unsigned int iio_get_time_res(const struct iio_dev *indio_dev);
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/* Device operating modes */
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#define INDIO_DIRECT_MODE 0x01
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#define INDIO_BUFFER_TRIGGERED 0x02
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#define INDIO_BUFFER_SOFTWARE 0x04
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#define INDIO_BUFFER_HARDWARE 0x08
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#define INDIO_EVENT_TRIGGERED 0x10
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#define INDIO_HARDWARE_TRIGGERED 0x20
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#define INDIO_ALL_BUFFER_MODES \
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(INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE | INDIO_BUFFER_SOFTWARE)
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#define INDIO_ALL_TRIGGERED_MODES \
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(INDIO_BUFFER_TRIGGERED \
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| INDIO_EVENT_TRIGGERED \
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| INDIO_HARDWARE_TRIGGERED)
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#define INDIO_MAX_RAW_ELEMENTS 4
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struct iio_trigger; /* forward declaration */
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/**
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* struct iio_info - constant information about device
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* @event_attrs: event control attributes
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* @attrs: general purpose device attributes
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* @read_raw: function to request a value from the device.
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* mask specifies which value. Note 0 means a reading of
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* the channel in question. Return value will specify the
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* type of value returned by the device. val and val2 will
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* contain the elements making up the returned value.
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* @read_raw_multi: function to return values from the device.
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* mask specifies which value. Note 0 means a reading of
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* the channel in question. Return value will specify the
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* type of value returned by the device. vals pointer
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* contain the elements making up the returned value.
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* max_len specifies maximum number of elements
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* vals pointer can contain. val_len is used to return
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* length of valid elements in vals.
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* @read_avail: function to return the available values from the device.
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* mask specifies which value. Note 0 means the available
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* values for the channel in question. Return value
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* specifies if a IIO_AVAIL_LIST or a IIO_AVAIL_RANGE is
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* returned in vals. The type of the vals are returned in
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* type and the number of vals is returned in length. For
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* ranges, there are always three vals returned; min, step
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* and max. For lists, all possible values are enumerated.
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* @write_raw: function to write a value to the device.
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* Parameters are the same as for read_raw.
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* @write_raw_get_fmt: callback function to query the expected
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* format/precision. If not set by the driver, write_raw
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* returns IIO_VAL_INT_PLUS_MICRO.
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* @read_event_config: find out if the event is enabled.
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* @write_event_config: set if the event is enabled.
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* @read_event_value: read a configuration value associated with the event.
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* @write_event_value: write a configuration value for the event.
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* @validate_trigger: function to validate the trigger when the
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* current trigger gets changed.
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* @update_scan_mode: function to configure device and scan buffer when
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* channels have changed
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* @debugfs_reg_access: function to read or write register value of device
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* @of_xlate: function pointer to obtain channel specifier index.
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* When #iio-cells is greater than '0', the driver could
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* provide a custom of_xlate function that reads the
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* *args* and returns the appropriate index in registered
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* IIO channels array.
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* @hwfifo_set_watermark: function pointer to set the current hardware
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* fifo watermark level; see hwfifo_* entries in
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* Documentation/ABI/testing/sysfs-bus-iio for details on
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* how the hardware fifo operates
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* @hwfifo_flush_to_buffer: function pointer to flush the samples stored
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* in the hardware fifo to the device buffer. The driver
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* should not flush more than count samples. The function
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* must return the number of samples flushed, 0 if no
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* samples were flushed or a negative integer if no samples
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* were flushed and there was an error.
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**/
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struct iio_info {
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const struct attribute_group *event_attrs;
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const struct attribute_group *attrs;
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int (*read_raw)(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val,
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int *val2,
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long mask);
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int (*read_raw_multi)(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int max_len,
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int *vals,
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int *val_len,
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long mask);
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int (*read_avail)(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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const int **vals,
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int *type,
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int *length,
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long mask);
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int (*write_raw)(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int val,
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int val2,
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long mask);
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int (*write_raw_get_fmt)(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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long mask);
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int (*read_event_config)(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir);
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int (*write_event_config)(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir,
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int state);
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int (*read_event_value)(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir,
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enum iio_event_info info, int *val, int *val2);
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int (*write_event_value)(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir,
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enum iio_event_info info, int val, int val2);
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int (*validate_trigger)(struct iio_dev *indio_dev,
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struct iio_trigger *trig);
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int (*update_scan_mode)(struct iio_dev *indio_dev,
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const unsigned long *scan_mask);
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int (*debugfs_reg_access)(struct iio_dev *indio_dev,
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unsigned reg, unsigned writeval,
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unsigned *readval);
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int (*of_xlate)(struct iio_dev *indio_dev,
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const struct of_phandle_args *iiospec);
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int (*hwfifo_set_watermark)(struct iio_dev *indio_dev, unsigned val);
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|
int (*hwfifo_flush_to_buffer)(struct iio_dev *indio_dev,
|
|
unsigned count);
|
|
};
|
|
|
|
/**
|
|
* struct iio_buffer_setup_ops - buffer setup related callbacks
|
|
* @preenable: [DRIVER] function to run prior to marking buffer enabled
|
|
* @postenable: [DRIVER] function to run after marking buffer enabled
|
|
* @predisable: [DRIVER] function to run prior to marking buffer
|
|
* disabled
|
|
* @postdisable: [DRIVER] function to run after marking buffer disabled
|
|
* @validate_scan_mask: [DRIVER] function callback to check whether a given
|
|
* scan mask is valid for the device.
|
|
*/
|
|
struct iio_buffer_setup_ops {
|
|
int (*preenable)(struct iio_dev *);
|
|
int (*postenable)(struct iio_dev *);
|
|
int (*predisable)(struct iio_dev *);
|
|
int (*postdisable)(struct iio_dev *);
|
|
bool (*validate_scan_mask)(struct iio_dev *indio_dev,
|
|
const unsigned long *scan_mask);
|
|
};
|
|
|
|
/**
|
|
* struct iio_dev - industrial I/O device
|
|
* @id: [INTERN] used to identify device internally
|
|
* @driver_module: [INTERN] used to make it harder to undercut users
|
|
* @modes: [DRIVER] operating modes supported by device
|
|
* @currentmode: [DRIVER] current operating mode
|
|
* @dev: [DRIVER] device structure, should be assigned a parent
|
|
* and owner
|
|
* @event_interface: [INTERN] event chrdevs associated with interrupt lines
|
|
* @buffer: [DRIVER] any buffer present
|
|
* @buffer_list: [INTERN] list of all buffers currently attached
|
|
* @scan_bytes: [INTERN] num bytes captured to be fed to buffer demux
|
|
* @mlock: [DRIVER] lock used to prevent simultaneous device state
|
|
* changes
|
|
* @available_scan_masks: [DRIVER] optional array of allowed bitmasks
|
|
* @masklength: [INTERN] the length of the mask established from
|
|
* channels
|
|
* @active_scan_mask: [INTERN] union of all scan masks requested by buffers
|
|
* @scan_timestamp: [INTERN] set if any buffers have requested timestamp
|
|
* @scan_index_timestamp:[INTERN] cache of the index to the timestamp
|
|
* @trig: [INTERN] current device trigger (buffer modes)
|
|
* @trig_readonly: [INTERN] mark the current trigger immutable
|
|
* @pollfunc: [DRIVER] function run on trigger being received
|
|
* @pollfunc_event: [DRIVER] function run on events trigger being received
|
|
* @channels: [DRIVER] channel specification structure table
|
|
* @num_channels: [DRIVER] number of channels specified in @channels.
|
|
* @channel_attr_list: [INTERN] keep track of automatically created channel
|
|
* attributes
|
|
* @chan_attr_group: [INTERN] group for all attrs in base directory
|
|
* @name: [DRIVER] name of the device.
|
|
* @info: [DRIVER] callbacks and constant info from driver
|
|
* @clock_id: [INTERN] timestamping clock posix identifier
|
|
* @info_exist_lock: [INTERN] lock to prevent use during removal
|
|
* @setup_ops: [DRIVER] callbacks to call before and after buffer
|
|
* enable/disable
|
|
* @chrdev: [INTERN] associated character device
|
|
* @groups: [INTERN] attribute groups
|
|
* @groupcounter: [INTERN] index of next attribute group
|
|
* @flags: [INTERN] file ops related flags including busy flag.
|
|
* @debugfs_dentry: [INTERN] device specific debugfs dentry.
|
|
* @cached_reg_addr: [INTERN] cached register address for debugfs reads.
|
|
*/
|
|
struct iio_dev {
|
|
int id;
|
|
struct module *driver_module;
|
|
|
|
int modes;
|
|
int currentmode;
|
|
struct device dev;
|
|
|
|
struct iio_event_interface *event_interface;
|
|
|
|
struct iio_buffer *buffer;
|
|
struct list_head buffer_list;
|
|
int scan_bytes;
|
|
struct mutex mlock;
|
|
|
|
const unsigned long *available_scan_masks;
|
|
unsigned masklength;
|
|
const unsigned long *active_scan_mask;
|
|
bool scan_timestamp;
|
|
unsigned scan_index_timestamp;
|
|
struct iio_trigger *trig;
|
|
bool trig_readonly;
|
|
struct iio_poll_func *pollfunc;
|
|
struct iio_poll_func *pollfunc_event;
|
|
|
|
struct iio_chan_spec const *channels;
|
|
int num_channels;
|
|
|
|
struct list_head channel_attr_list;
|
|
struct attribute_group chan_attr_group;
|
|
const char *name;
|
|
const struct iio_info *info;
|
|
clockid_t clock_id;
|
|
struct mutex info_exist_lock;
|
|
const struct iio_buffer_setup_ops *setup_ops;
|
|
struct cdev chrdev;
|
|
#define IIO_MAX_GROUPS 6
|
|
const struct attribute_group *groups[IIO_MAX_GROUPS + 1];
|
|
int groupcounter;
|
|
|
|
unsigned long flags;
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
struct dentry *debugfs_dentry;
|
|
unsigned cached_reg_addr;
|
|
#endif
|
|
};
|
|
|
|
const struct iio_chan_spec
|
|
*iio_find_channel_from_si(struct iio_dev *indio_dev, int si);
|
|
/**
|
|
* iio_device_register() - register a device with the IIO subsystem
|
|
* @indio_dev: Device structure filled by the device driver
|
|
**/
|
|
#define iio_device_register(indio_dev) \
|
|
__iio_device_register((indio_dev), THIS_MODULE)
|
|
int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod);
|
|
void iio_device_unregister(struct iio_dev *indio_dev);
|
|
/**
|
|
* devm_iio_device_register - Resource-managed iio_device_register()
|
|
* @dev: Device to allocate iio_dev for
|
|
* @indio_dev: Device structure filled by the device driver
|
|
*
|
|
* Managed iio_device_register. The IIO device registered with this
|
|
* function is automatically unregistered on driver detach. This function
|
|
* calls iio_device_register() internally. Refer to that function for more
|
|
* information.
|
|
*
|
|
* If an iio_dev registered with this function needs to be unregistered
|
|
* separately, devm_iio_device_unregister() must be used.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, negative error number on failure.
|
|
*/
|
|
#define devm_iio_device_register(dev, indio_dev) \
|
|
__devm_iio_device_register((dev), (indio_dev), THIS_MODULE)
|
|
int __devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev,
|
|
struct module *this_mod);
|
|
void devm_iio_device_unregister(struct device *dev, struct iio_dev *indio_dev);
|
|
int iio_push_event(struct iio_dev *indio_dev, u64 ev_code, s64 timestamp);
|
|
int iio_device_claim_direct_mode(struct iio_dev *indio_dev);
|
|
void iio_device_release_direct_mode(struct iio_dev *indio_dev);
|
|
|
|
extern struct bus_type iio_bus_type;
|
|
|
|
/**
|
|
* iio_device_put() - reference counted deallocation of struct device
|
|
* @indio_dev: IIO device structure containing the device
|
|
**/
|
|
static inline void iio_device_put(struct iio_dev *indio_dev)
|
|
{
|
|
if (indio_dev)
|
|
put_device(&indio_dev->dev);
|
|
}
|
|
|
|
/**
|
|
* iio_device_get_clock() - Retrieve current timestamping clock for the device
|
|
* @indio_dev: IIO device structure containing the device
|
|
*/
|
|
static inline clockid_t iio_device_get_clock(const struct iio_dev *indio_dev)
|
|
{
|
|
return indio_dev->clock_id;
|
|
}
|
|
|
|
/**
|
|
* dev_to_iio_dev() - Get IIO device struct from a device struct
|
|
* @dev: The device embedded in the IIO device
|
|
*
|
|
* Note: The device must be a IIO device, otherwise the result is undefined.
|
|
*/
|
|
static inline struct iio_dev *dev_to_iio_dev(struct device *dev)
|
|
{
|
|
return container_of(dev, struct iio_dev, dev);
|
|
}
|
|
|
|
/**
|
|
* iio_device_get() - increment reference count for the device
|
|
* @indio_dev: IIO device structure
|
|
*
|
|
* Returns: The passed IIO device
|
|
**/
|
|
static inline struct iio_dev *iio_device_get(struct iio_dev *indio_dev)
|
|
{
|
|
return indio_dev ? dev_to_iio_dev(get_device(&indio_dev->dev)) : NULL;
|
|
}
|
|
|
|
|
|
/**
|
|
* iio_device_set_drvdata() - Set device driver data
|
|
* @indio_dev: IIO device structure
|
|
* @data: Driver specific data
|
|
*
|
|
* Allows to attach an arbitrary pointer to an IIO device, which can later be
|
|
* retrieved by iio_device_get_drvdata().
|
|
*/
|
|
static inline void iio_device_set_drvdata(struct iio_dev *indio_dev, void *data)
|
|
{
|
|
dev_set_drvdata(&indio_dev->dev, data);
|
|
}
|
|
|
|
/**
|
|
* iio_device_get_drvdata() - Get device driver data
|
|
* @indio_dev: IIO device structure
|
|
*
|
|
* Returns the data previously set with iio_device_set_drvdata()
|
|
*/
|
|
static inline void *iio_device_get_drvdata(struct iio_dev *indio_dev)
|
|
{
|
|
return dev_get_drvdata(&indio_dev->dev);
|
|
}
|
|
|
|
/* Can we make this smaller? */
|
|
#define IIO_ALIGN L1_CACHE_BYTES
|
|
struct iio_dev *iio_device_alloc(int sizeof_priv);
|
|
|
|
static inline void *iio_priv(const struct iio_dev *indio_dev)
|
|
{
|
|
return (char *)indio_dev + ALIGN(sizeof(struct iio_dev), IIO_ALIGN);
|
|
}
|
|
|
|
static inline struct iio_dev *iio_priv_to_dev(void *priv)
|
|
{
|
|
return (struct iio_dev *)((char *)priv -
|
|
ALIGN(sizeof(struct iio_dev), IIO_ALIGN));
|
|
}
|
|
|
|
void iio_device_free(struct iio_dev *indio_dev);
|
|
int devm_iio_device_match(struct device *dev, void *res, void *data);
|
|
struct iio_dev *devm_iio_device_alloc(struct device *dev, int sizeof_priv);
|
|
void devm_iio_device_free(struct device *dev, struct iio_dev *indio_dev);
|
|
struct iio_trigger *devm_iio_trigger_alloc(struct device *dev,
|
|
const char *fmt, ...);
|
|
void devm_iio_trigger_free(struct device *dev, struct iio_trigger *iio_trig);
|
|
|
|
/**
|
|
* iio_buffer_enabled() - helper function to test if the buffer is enabled
|
|
* @indio_dev: IIO device structure for device
|
|
**/
|
|
static inline bool iio_buffer_enabled(struct iio_dev *indio_dev)
|
|
{
|
|
return indio_dev->currentmode
|
|
& (INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE |
|
|
INDIO_BUFFER_SOFTWARE);
|
|
}
|
|
|
|
/**
|
|
* iio_get_debugfs_dentry() - helper function to get the debugfs_dentry
|
|
* @indio_dev: IIO device structure for device
|
|
**/
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev)
|
|
{
|
|
return indio_dev->debugfs_dentry;
|
|
}
|
|
#else
|
|
static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
|
|
|
|
int iio_str_to_fixpoint(const char *str, int fract_mult, int *integer,
|
|
int *fract);
|
|
|
|
/**
|
|
* IIO_DEGREE_TO_RAD() - Convert degree to rad
|
|
* @deg: A value in degree
|
|
*
|
|
* Returns the given value converted from degree to rad
|
|
*/
|
|
#define IIO_DEGREE_TO_RAD(deg) (((deg) * 314159ULL + 9000000ULL) / 18000000ULL)
|
|
|
|
/**
|
|
* IIO_RAD_TO_DEGREE() - Convert rad to degree
|
|
* @rad: A value in rad
|
|
*
|
|
* Returns the given value converted from rad to degree
|
|
*/
|
|
#define IIO_RAD_TO_DEGREE(rad) \
|
|
(((rad) * 18000000ULL + 314159ULL / 2) / 314159ULL)
|
|
|
|
/**
|
|
* IIO_G_TO_M_S_2() - Convert g to meter / second**2
|
|
* @g: A value in g
|
|
*
|
|
* Returns the given value converted from g to meter / second**2
|
|
*/
|
|
#define IIO_G_TO_M_S_2(g) ((g) * 980665ULL / 100000ULL)
|
|
|
|
/**
|
|
* IIO_M_S_2_TO_G() - Convert meter / second**2 to g
|
|
* @ms2: A value in meter / second**2
|
|
*
|
|
* Returns the given value converted from meter / second**2 to g
|
|
*/
|
|
#define IIO_M_S_2_TO_G(ms2) (((ms2) * 100000ULL + 980665ULL / 2) / 980665ULL)
|
|
|
|
#endif /* _INDUSTRIAL_IO_H_ */
|