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/* 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.
*
* General attributes
*/
#ifndef _INDUSTRIAL_IO_SYSFS_H_
#define _INDUSTRIAL_IO_SYSFS_H_
#include "iio.h"
/**
* struct iio_dev_attr - iio specific device attribute
* @dev_attr: underlying device attribute
* @address: associated register address
* @val2: secondary attribute value
* @l: list head for maintaining list of dynamically created attrs.
*/
struct iio_dev_attr {
struct device_attribute dev_attr;
int address;
int val2;
struct list_head l;
struct iio_chan_spec const *c;
};
#define to_iio_dev_attr(_dev_attr) \
container_of(_dev_attr, struct iio_dev_attr, dev_attr)
ssize_t iio_read_const_attr(struct device *dev,
struct device_attribute *attr,
char *len);
/**
* struct iio_const_attr - constant device specific attribute
* often used for things like available modes
* @string: attribute string
* @dev_attr: underlying device attribute
*/
struct iio_const_attr {
const char *string;
struct device_attribute dev_attr;
};
#define to_iio_const_attr(_dev_attr) \
container_of(_dev_attr, struct iio_const_attr, dev_attr)
/* Some attributes will be hard coded (device dependent) and not require an
address, in these cases pass a negative */
#define IIO_ATTR(_name, _mode, _show, _store, _addr) \
{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
.address = _addr }
#define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
struct iio_dev_attr iio_dev_attr_##_name \
= IIO_ATTR(_name, _mode, _show, _store, _addr)
#define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
struct iio_dev_attr iio_dev_attr_##_vname \
= IIO_ATTR(_name, _mode, _show, _store, _addr)
#define IIO_DEVICE_ATTR_2(_name, _mode, _show, _store, _addr, _val2) \
struct iio_dev_attr iio_dev_attr_##_name \
= IIO_ATTR_2(_name, _mode, _show, _store, _addr, _val2)
#define IIO_CONST_ATTR(_name, _string) \
struct iio_const_attr iio_const_attr_##_name \
= { .string = _string, \
.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
#define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
struct iio_const_attr iio_const_attr_##_vname \
= { .string = _string, \
.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
/* Generic attributes of onetype or another */
/**
* IIO_DEV_ATTR_REV - revision number for the device
* @_show: output method for the attribute
*
* Very much device dependent.
**/
#define IIO_DEV_ATTR_REV(_show) \
IIO_DEVICE_ATTR(revision, S_IRUGO, _show, NULL, 0)
/**
* IIO_DEV_ATTR_RESET: resets the device
**/
#define IIO_DEV_ATTR_RESET(_store) \
IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, _store, 0)
/**
* IIO_CONST_ATTR_NAME - constant identifier
* @_string: the name
**/
#define IIO_CONST_ATTR_NAME(_string) \
IIO_CONST_ATTR(name, _string)
/**
* IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
* @_mode: sysfs file mode/permissions
* @_show: output method for the attribute
* @_store: input method for the attribute
**/
#define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0)
/**
* IIO_DEV_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies
* @_show: output method for the attribute
*
* May be mode dependent on some devices
**/
/* Deprecated */
#define IIO_DEV_ATTR_AVAIL_SAMP_FREQ(_show) \
IIO_DEVICE_ATTR(available_sampling_frequency, S_IRUGO, _show, NULL, 0)
#define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0)
/**
* IIO_CONST_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies
* @_string: frequency string for the attribute
*
* Constant version
**/
#define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
IIO_CONST_ATTR(sampling_frequency_available, _string)
/**
* IIO_DEV_ATTR_SW_RING_ENABLE - enable software ring buffer
* @_show: output method for the attribute
* @_store: input method for the attribute
*
* Success may be dependent on attachment of trigger previously.
**/
#define IIO_DEV_ATTR_SW_RING_ENABLE(_show, _store) \
IIO_DEVICE_ATTR(sw_ring_enable, S_IRUGO | S_IWUSR, _show, _store, 0)
/**
* IIO_DEV_ATTR_HW_RING_ENABLE - enable hardware ring buffer
* @_show: output method for the attribute
* @_store: input method for the attribute
*
* This is a different attribute from the software one as one can envision
* schemes where a combination of the two may be used.
**/
#define IIO_DEV_ATTR_HW_RING_ENABLE(_show, _store) \
IIO_DEVICE_ATTR(hw_ring_enable, S_IRUGO | S_IWUSR, _show, _store, 0)
#define IIO_DEV_ATTR_TEMP_RAW(_show) \
IIO_DEVICE_ATTR(temp_raw, S_IRUGO, _show, NULL, 0)
#define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
IIO_CONST_ATTR(temp_offset, _string)
#define IIO_CONST_ATTR_TEMP_SCALE(_string) \
IIO_CONST_ATTR(temp_scale, _string)
/* must match our channel defs */
#define IIO_EV_CLASS_IN IIO_IN
#define IIO_EV_CLASS_IN_DIFF IIO_IN_DIFF
#define IIO_EV_CLASS_ACCEL IIO_ACCEL
#define IIO_EV_CLASS_GYRO IIO_GYRO
#define IIO_EV_CLASS_MAGN IIO_MAGN
#define IIO_EV_CLASS_LIGHT IIO_LIGHT
#define IIO_EV_CLASS_PROXIMITY IIO_PROXIMITY
#define IIO_EV_CLASS_TEMP IIO_TEMP
#define IIO_EV_MOD_X IIO_MOD_X
#define IIO_EV_MOD_Y IIO_MOD_Y
#define IIO_EV_MOD_Z IIO_MOD_Z
#define IIO_EV_MOD_X_AND_Y IIO_MOD_X_AND_Y
#define IIO_EV_MOD_X_ANX_Z IIO_MOD_X_AND_Z
#define IIO_EV_MOD_Y_AND_Z IIO_MOD_Y_AND_Z
#define IIO_EV_MOD_X_AND_Y_AND_Z IIO_MOD_X_AND_Y_AND_Z
#define IIO_EV_MOD_X_OR_Y IIO_MOD_X_OR_Y
#define IIO_EV_MOD_X_OR_Z IIO_MOD_X_OR_Z
#define IIO_EV_MOD_Y_OR_Z IIO_MOD_Y_OR_Z
#define IIO_EV_MOD_X_OR_Y_OR_Z IIO_MOD_X_OR_Y_OR_Z
#define IIO_EV_TYPE_THRESH 0
#define IIO_EV_TYPE_MAG 1
#define IIO_EV_TYPE_ROC 2
#define IIO_EV_DIR_EITHER 0
#define IIO_EV_DIR_RISING 1
#define IIO_EV_DIR_FALLING 2
#define IIO_EV_TYPE_MAX 8
#define IIO_EV_BIT(type, direction) \
(1 << (type*IIO_EV_TYPE_MAX + direction))
#define IIO_EVENT_CODE(channelclass, orient_bit, number, \
modifier, type, direction) \
(channelclass | (orient_bit << 8) | ((number) << 9) | \
((modifier) << 13) | ((type) << 16) | ((direction) << 24))
#define IIO_MOD_EVENT_CODE(channelclass, number, modifier, \
type, direction) \
IIO_EVENT_CODE(channelclass, 1, number, modifier, type, direction)
#define IIO_UNMOD_EVENT_CODE(channelclass, number, type, direction) \
IIO_EVENT_CODE(channelclass, 0, number, 0, type, direction)
#define IIO_BUFFER_EVENT_CODE(code) \
(IIO_EV_CLASS_BUFFER | (code << 8))
#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 24) & 0xf)
/* Event code number extraction depends on which type of event we have.
* Perhaps review this function in the future*/
#define IIO_EVENT_CODE_EXTRACT_NUM(mask) ((mask >> 9) & 0x0f)
#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 13) & 0x7)
#endif /* _INDUSTRIAL_IO_SYSFS_H_ */
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