678 строки
22 KiB
C
678 строки
22 KiB
C
|
|
/* The industrial I/O core
|
|
*
|
|
* 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 _INDUSTRIAL_IO_H_
|
|
#define _INDUSTRIAL_IO_H_
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/cdev.h>
|
|
#include <linux/iio/types.h>
|
|
#include <linux/of.h>
|
|
/* IIO TODO LIST */
|
|
/*
|
|
* Provide means of adjusting timer accuracy.
|
|
* Currently assumes nano seconds.
|
|
*/
|
|
|
|
enum iio_chan_info_enum {
|
|
IIO_CHAN_INFO_RAW = 0,
|
|
IIO_CHAN_INFO_PROCESSED,
|
|
IIO_CHAN_INFO_SCALE,
|
|
IIO_CHAN_INFO_OFFSET,
|
|
IIO_CHAN_INFO_CALIBSCALE,
|
|
IIO_CHAN_INFO_CALIBBIAS,
|
|
IIO_CHAN_INFO_PEAK,
|
|
IIO_CHAN_INFO_PEAK_SCALE,
|
|
IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW,
|
|
IIO_CHAN_INFO_AVERAGE_RAW,
|
|
IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY,
|
|
IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY,
|
|
IIO_CHAN_INFO_SAMP_FREQ,
|
|
IIO_CHAN_INFO_FREQUENCY,
|
|
IIO_CHAN_INFO_PHASE,
|
|
IIO_CHAN_INFO_HARDWAREGAIN,
|
|
IIO_CHAN_INFO_HYSTERESIS,
|
|
IIO_CHAN_INFO_INT_TIME,
|
|
IIO_CHAN_INFO_ENABLE,
|
|
IIO_CHAN_INFO_CALIBHEIGHT,
|
|
IIO_CHAN_INFO_CALIBWEIGHT,
|
|
IIO_CHAN_INFO_DEBOUNCE_COUNT,
|
|
IIO_CHAN_INFO_DEBOUNCE_TIME,
|
|
IIO_CHAN_INFO_CALIBEMISSIVITY,
|
|
IIO_CHAN_INFO_OVERSAMPLING_RATIO,
|
|
};
|
|
|
|
enum iio_shared_by {
|
|
IIO_SEPARATE,
|
|
IIO_SHARED_BY_TYPE,
|
|
IIO_SHARED_BY_DIR,
|
|
IIO_SHARED_BY_ALL
|
|
};
|
|
|
|
enum iio_endian {
|
|
IIO_CPU,
|
|
IIO_BE,
|
|
IIO_LE,
|
|
};
|
|
|
|
struct iio_chan_spec;
|
|
struct iio_dev;
|
|
|
|
/**
|
|
* struct iio_chan_spec_ext_info - Extended channel info attribute
|
|
* @name: Info attribute name
|
|
* @shared: Whether this attribute is shared between all channels.
|
|
* @read: Read callback for this info attribute, may be NULL.
|
|
* @write: Write callback for this info attribute, may be NULL.
|
|
* @private: Data private to the driver.
|
|
*/
|
|
struct iio_chan_spec_ext_info {
|
|
const char *name;
|
|
enum iio_shared_by shared;
|
|
ssize_t (*read)(struct iio_dev *, uintptr_t private,
|
|
struct iio_chan_spec const *, char *buf);
|
|
ssize_t (*write)(struct iio_dev *, uintptr_t private,
|
|
struct iio_chan_spec const *, const char *buf,
|
|
size_t len);
|
|
uintptr_t private;
|
|
};
|
|
|
|
/**
|
|
* struct iio_enum - Enum channel info attribute
|
|
* @items: An array of strings.
|
|
* @num_items: Length of the item array.
|
|
* @set: Set callback function, may be NULL.
|
|
* @get: Get callback function, may be NULL.
|
|
*
|
|
* The iio_enum struct can be used to implement enum style channel attributes.
|
|
* Enum style attributes are those which have a set of strings which map to
|
|
* unsigned integer values. The IIO enum helper code takes care of mapping
|
|
* between value and string as well as generating a "_available" file which
|
|
* contains a list of all available items. The set callback will be called when
|
|
* the attribute is updated. The last parameter is the index to the newly
|
|
* activated item. The get callback will be used to query the currently active
|
|
* item and is supposed to return the index for it.
|
|
*/
|
|
struct iio_enum {
|
|
const char * const *items;
|
|
unsigned int num_items;
|
|
int (*set)(struct iio_dev *, const struct iio_chan_spec *, unsigned int);
|
|
int (*get)(struct iio_dev *, const struct iio_chan_spec *);
|
|
};
|
|
|
|
ssize_t iio_enum_available_read(struct iio_dev *indio_dev,
|
|
uintptr_t priv, const struct iio_chan_spec *chan, char *buf);
|
|
ssize_t iio_enum_read(struct iio_dev *indio_dev,
|
|
uintptr_t priv, const struct iio_chan_spec *chan, char *buf);
|
|
ssize_t iio_enum_write(struct iio_dev *indio_dev,
|
|
uintptr_t priv, const struct iio_chan_spec *chan, const char *buf,
|
|
size_t len);
|
|
|
|
/**
|
|
* IIO_ENUM() - Initialize enum extended channel attribute
|
|
* @_name: Attribute name
|
|
* @_shared: Whether the attribute is shared between all channels
|
|
* @_e: Pointer to an iio_enum struct
|
|
*
|
|
* This should usually be used together with IIO_ENUM_AVAILABLE()
|
|
*/
|
|
#define IIO_ENUM(_name, _shared, _e) \
|
|
{ \
|
|
.name = (_name), \
|
|
.shared = (_shared), \
|
|
.read = iio_enum_read, \
|
|
.write = iio_enum_write, \
|
|
.private = (uintptr_t)(_e), \
|
|
}
|
|
|
|
/**
|
|
* IIO_ENUM_AVAILABLE() - Initialize enum available extended channel attribute
|
|
* @_name: Attribute name ("_available" will be appended to the name)
|
|
* @_e: Pointer to an iio_enum struct
|
|
*
|
|
* Creates a read only attribute which lists all the available enum items in a
|
|
* space separated list. This should usually be used together with IIO_ENUM()
|
|
*/
|
|
#define IIO_ENUM_AVAILABLE(_name, _e) \
|
|
{ \
|
|
.name = (_name "_available"), \
|
|
.shared = IIO_SHARED_BY_TYPE, \
|
|
.read = iio_enum_available_read, \
|
|
.private = (uintptr_t)(_e), \
|
|
}
|
|
|
|
/**
|
|
* struct iio_event_spec - specification for a channel event
|
|
* @type: Type of the event
|
|
* @dir: Direction of the event
|
|
* @mask_separate: Bit mask of enum iio_event_info values. Attributes
|
|
* set in this mask will be registered per channel.
|
|
* @mask_shared_by_type: Bit mask of enum iio_event_info values. Attributes
|
|
* set in this mask will be shared by channel type.
|
|
* @mask_shared_by_dir: Bit mask of enum iio_event_info values. Attributes
|
|
* set in this mask will be shared by channel type and
|
|
* direction.
|
|
* @mask_shared_by_all: Bit mask of enum iio_event_info values. Attributes
|
|
* set in this mask will be shared by all channels.
|
|
*/
|
|
struct iio_event_spec {
|
|
enum iio_event_type type;
|
|
enum iio_event_direction dir;
|
|
unsigned long mask_separate;
|
|
unsigned long mask_shared_by_type;
|
|
unsigned long mask_shared_by_dir;
|
|
unsigned long mask_shared_by_all;
|
|
};
|
|
|
|
/**
|
|
* struct iio_chan_spec - specification of a single channel
|
|
* @type: What type of measurement is the channel making.
|
|
* @channel: What number do we wish to assign the channel.
|
|
* @channel2: If there is a second number for a differential
|
|
* channel then this is it. If modified is set then the
|
|
* value here specifies the modifier.
|
|
* @address: Driver specific identifier.
|
|
* @scan_index: Monotonic index to give ordering in scans when read
|
|
* from a buffer.
|
|
* @scan_type: sign: 's' or 'u' to specify signed or unsigned
|
|
* realbits: Number of valid bits of data
|
|
* storagebits: Realbits + padding
|
|
* shift: Shift right by this before masking out
|
|
* realbits.
|
|
* repeat: Number of times real/storage bits
|
|
* repeats. When the repeat element is
|
|
* more than 1, then the type element in
|
|
* sysfs will show a repeat value.
|
|
* Otherwise, the number of repetitions is
|
|
* omitted.
|
|
* endianness: little or big endian
|
|
* @info_mask_separate: What information is to be exported that is specific to
|
|
* this channel.
|
|
* @info_mask_shared_by_type: What information is to be exported that is shared
|
|
* by all channels of the same type.
|
|
* @info_mask_shared_by_dir: What information is to be exported that is shared
|
|
* by all channels of the same direction.
|
|
* @info_mask_shared_by_all: What information is to be exported that is shared
|
|
* by all channels.
|
|
* @event_spec: Array of events which should be registered for this
|
|
* channel.
|
|
* @num_event_specs: Size of the event_spec array.
|
|
* @ext_info: Array of extended info attributes for this channel.
|
|
* The array is NULL terminated, the last element should
|
|
* have its name field set to NULL.
|
|
* @extend_name: Allows labeling of channel attributes with an
|
|
* informative name. Note this has no effect codes etc,
|
|
* unlike modifiers.
|
|
* @datasheet_name: A name used in in-kernel mapping of channels. It should
|
|
* correspond to the first name that the channel is referred
|
|
* to by in the datasheet (e.g. IND), or the nearest
|
|
* possible compound name (e.g. IND-INC).
|
|
* @modified: Does a modifier apply to this channel. What these are
|
|
* depends on the channel type. Modifier is set in
|
|
* channel2. Examples are IIO_MOD_X for axial sensors about
|
|
* the 'x' axis.
|
|
* @indexed: Specify the channel has a numerical index. If not,
|
|
* the channel index number will be suppressed for sysfs
|
|
* attributes but not for event codes.
|
|
* @output: Channel is output.
|
|
* @differential: Channel is differential.
|
|
*/
|
|
struct iio_chan_spec {
|
|
enum iio_chan_type type;
|
|
int channel;
|
|
int channel2;
|
|
unsigned long address;
|
|
int scan_index;
|
|
struct {
|
|
char sign;
|
|
u8 realbits;
|
|
u8 storagebits;
|
|
u8 shift;
|
|
u8 repeat;
|
|
enum iio_endian endianness;
|
|
} scan_type;
|
|
long info_mask_separate;
|
|
long info_mask_shared_by_type;
|
|
long info_mask_shared_by_dir;
|
|
long info_mask_shared_by_all;
|
|
const struct iio_event_spec *event_spec;
|
|
unsigned int num_event_specs;
|
|
const struct iio_chan_spec_ext_info *ext_info;
|
|
const char *extend_name;
|
|
const char *datasheet_name;
|
|
unsigned modified:1;
|
|
unsigned indexed:1;
|
|
unsigned output:1;
|
|
unsigned differential:1;
|
|
};
|
|
|
|
|
|
/**
|
|
* iio_channel_has_info() - Checks whether a channel supports a info attribute
|
|
* @chan: The channel to be queried
|
|
* @type: Type of the info attribute to be checked
|
|
*
|
|
* Returns true if the channels supports reporting values for the given info
|
|
* attribute type, false otherwise.
|
|
*/
|
|
static inline bool iio_channel_has_info(const struct iio_chan_spec *chan,
|
|
enum iio_chan_info_enum type)
|
|
{
|
|
return (chan->info_mask_separate & BIT(type)) |
|
|
(chan->info_mask_shared_by_type & BIT(type)) |
|
|
(chan->info_mask_shared_by_dir & BIT(type)) |
|
|
(chan->info_mask_shared_by_all & BIT(type));
|
|
}
|
|
|
|
#define IIO_CHAN_SOFT_TIMESTAMP(_si) { \
|
|
.type = IIO_TIMESTAMP, \
|
|
.channel = -1, \
|
|
.scan_index = _si, \
|
|
.scan_type = { \
|
|
.sign = 's', \
|
|
.realbits = 64, \
|
|
.storagebits = 64, \
|
|
}, \
|
|
}
|
|
|
|
/**
|
|
* iio_get_time_ns() - utility function to get a time stamp for events etc
|
|
**/
|
|
static inline s64 iio_get_time_ns(void)
|
|
{
|
|
return ktime_get_real_ns();
|
|
}
|
|
|
|
/* Device operating modes */
|
|
#define INDIO_DIRECT_MODE 0x01
|
|
#define INDIO_BUFFER_TRIGGERED 0x02
|
|
#define INDIO_BUFFER_SOFTWARE 0x04
|
|
#define INDIO_BUFFER_HARDWARE 0x08
|
|
#define INDIO_EVENT_TRIGGERED 0x10
|
|
|
|
#define INDIO_ALL_BUFFER_MODES \
|
|
(INDIO_BUFFER_TRIGGERED | INDIO_BUFFER_HARDWARE | INDIO_BUFFER_SOFTWARE)
|
|
|
|
#define INDIO_MAX_RAW_ELEMENTS 4
|
|
|
|
struct iio_trigger; /* forward declaration */
|
|
struct iio_dev;
|
|
|
|
/**
|
|
* struct iio_info - constant information about device
|
|
* @driver_module: module structure used to ensure correct
|
|
* ownership of chrdevs etc
|
|
* @event_attrs: event control attributes
|
|
* @attrs: general purpose device attributes
|
|
* @read_raw: function to request a value from the device.
|
|
* mask specifies which value. Note 0 means a reading of
|
|
* the channel in question. Return value will specify the
|
|
* type of value returned by the device. val and val2 will
|
|
* contain the elements making up the returned value.
|
|
* @read_raw_multi: function to return values from the device.
|
|
* mask specifies which value. Note 0 means a reading of
|
|
* the channel in question. Return value will specify the
|
|
* type of value returned by the device. vals pointer
|
|
* contain the elements making up the returned value.
|
|
* max_len specifies maximum number of elements
|
|
* vals pointer can contain. val_len is used to return
|
|
* length of valid elements in vals.
|
|
* @write_raw: function to write a value to the device.
|
|
* Parameters are the same as for read_raw.
|
|
* @write_raw_get_fmt: callback function to query the expected
|
|
* format/precision. If not set by the driver, write_raw
|
|
* returns IIO_VAL_INT_PLUS_MICRO.
|
|
* @read_event_config: find out if the event is enabled.
|
|
* @write_event_config: set if the event is enabled.
|
|
* @read_event_value: read a configuration value associated with the event.
|
|
* @write_event_value: write a configuration value for the event.
|
|
* @validate_trigger: function to validate the trigger when the
|
|
* current trigger gets changed.
|
|
* @update_scan_mode: function to configure device and scan buffer when
|
|
* channels have changed
|
|
* @debugfs_reg_access: function to read or write register value of device
|
|
* @of_xlate: function pointer to obtain channel specifier index.
|
|
* When #iio-cells is greater than '0', the driver could
|
|
* provide a custom of_xlate function that reads the
|
|
* *args* and returns the appropriate index in registered
|
|
* IIO channels array.
|
|
* @hwfifo_set_watermark: function pointer to set the current hardware
|
|
* fifo watermark level; see hwfifo_* entries in
|
|
* Documentation/ABI/testing/sysfs-bus-iio for details on
|
|
* how the hardware fifo operates
|
|
* @hwfifo_flush_to_buffer: function pointer to flush the samples stored
|
|
* in the hardware fifo to the device buffer. The driver
|
|
* should not flush more than count samples. The function
|
|
* must return the number of samples flushed, 0 if no
|
|
* samples were flushed or a negative integer if no samples
|
|
* were flushed and there was an error.
|
|
**/
|
|
struct iio_info {
|
|
struct module *driver_module;
|
|
struct attribute_group *event_attrs;
|
|
const struct attribute_group *attrs;
|
|
|
|
int (*read_raw)(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val,
|
|
int *val2,
|
|
long mask);
|
|
|
|
int (*read_raw_multi)(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int max_len,
|
|
int *vals,
|
|
int *val_len,
|
|
long mask);
|
|
|
|
int (*write_raw)(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int val,
|
|
int val2,
|
|
long mask);
|
|
|
|
int (*write_raw_get_fmt)(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
long mask);
|
|
|
|
int (*read_event_config)(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir);
|
|
|
|
int (*write_event_config)(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
int state);
|
|
|
|
int (*read_event_value)(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
enum iio_event_info info, int *val, int *val2);
|
|
|
|
int (*write_event_value)(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
enum iio_event_info info, int val, int val2);
|
|
|
|
int (*validate_trigger)(struct iio_dev *indio_dev,
|
|
struct iio_trigger *trig);
|
|
int (*update_scan_mode)(struct iio_dev *indio_dev,
|
|
const unsigned long *scan_mask);
|
|
int (*debugfs_reg_access)(struct iio_dev *indio_dev,
|
|
unsigned reg, unsigned writeval,
|
|
unsigned *readval);
|
|
int (*of_xlate)(struct iio_dev *indio_dev,
|
|
const struct of_phandle_args *iiospec);
|
|
int (*hwfifo_set_watermark)(struct iio_dev *indio_dev, unsigned val);
|
|
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
|
|
* @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)
|
|
* @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
|
|
* @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;
|
|
|
|
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;
|
|
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;
|
|
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);
|
|
int iio_device_register(struct iio_dev *indio_dev);
|
|
void iio_device_unregister(struct iio_dev *indio_dev);
|
|
int devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev);
|
|
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);
|
|
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
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_ */
|