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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_event_attribute - event control attribute
* @dev_attr: underlying device attribute
* @mask: mask for the event when detecting
* @listel: list header to allow addition to list of event handlers
*/
struct iio_event_attr {
struct device_attribute dev_attr;
int mask;
struct iio_event_handler_list *listel;
};
#define to_iio_event_attr(_dev_attr) \
container_of(_dev_attr, struct iio_event_attr, dev_attr)
/**
* struct iio_chrdev_minor_attr - simple attribute to allow reading of chrdev
* minor number
* @dev_attr: underlying device attribute
* @minor: the minor number
*/
struct iio_chrdev_minor_attr {
struct device_attribute dev_attr;
int minor;
};
void
__init_iio_chrdev_minor_attr(struct iio_chrdev_minor_attr *minor_attr,
const char *name,
struct module *owner,
int id);
#define to_iio_chrdev_minor_attr(_dev_attr) \
container_of(_dev_attr, struct iio_chrdev_minor_attr, dev_attr);
/**
* struct iio_dev_attr - iio specific device attribute
* @dev_attr: underlying device attribute
* @address: associated register address
*/
struct iio_dev_attr {
struct device_attribute dev_attr;
int address;
int val2;
};
#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
*/
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 dependant) 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_ATTR_2(_name, _mode, _show, _store, _addr, _val2) \
{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
.address = _addr, \
.val2 = _val2 }
#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_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)}
/* Generic attributes of onetype or another */
/**
* IIO_DEV_ATTR_REG: revision number for the device
*
* Very much device dependent.
**/
#define IIO_DEV_ATTR_REV(_show) \
IIO_DEVICE_ATTR(revision, S_IRUGO, _show, NULL, 0)
/**
* IIO_DEV_ATTR_NAME: chip type dependant identifier
**/
#define IIO_DEV_ATTR_NAME(_show) \
IIO_DEVICE_ATTR(name, S_IRUGO, _show, NULL, 0)
/**
* IIO_DEV_ATTR_SAMP_FREQ: sets any internal clock frequency
**/
#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.
*
* May be mode dependant on some devices
**/
#define IIO_DEV_ATTR_AVAIL_SAMP_FREQ(_show) \
IIO_DEVICE_ATTR(available_sampling_frequency, S_IRUGO, _show, NULL, 0)
/**
* IIO_DEV_ATTR_CONST_AVAIL_SAMP_FREQ: list available sampling frequencies.
*
* Constant version
**/
#define IIO_CONST_ATTR_AVAIL_SAMP_FREQ(_string) \
IIO_CONST_ATTR(available_sampling_frequency, _string)
/**
* IIO_DEV_ATTR_SCAN_MODE: select a scan mode
*
* This is used when only certain combinations of inputs may be read in one
* scan.
**/
#define IIO_DEV_ATTR_SCAN_MODE(_mode, _show, _store) \
IIO_DEVICE_ATTR(scan_mode, _mode, _show, _store, 0)
/**
* IIO_DEV_ATTR_AVAIL_SCAN_MODES: list available scan modes
**/
#define IIO_DEV_ATTR_AVAIL_SCAN_MODES(_show) \
IIO_DEVICE_ATTR(available_scan_modes, S_IRUGO, _show, NULL, 0)
/**
* IIO_DEV_ATTR_SCAN: result of scan of multiple channels
**/
#define IIO_DEV_ATTR_SCAN(_show) \
IIO_DEVICE_ATTR(scan, S_IRUGO, _show, NULL, 0);
/**
* IIO_DEV_ATTR_INPUT: direct read of a single input channel
**/
#define IIO_DEV_ATTR_INPUT(_number, _show) \
IIO_DEVICE_ATTR(in##_number, S_IRUGO, _show, NULL, _number)
/**
* IIO_DEV_ATTR_SW_RING_ENABLE: enable software ring buffer
*
* Success may be dependant 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
*
* This is a different attribute from the software one as one can invision
* 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)
/**
* IIO_DEV_ATTR_BPSE: set number of bits per scan element
**/
#define IIO_DEV_ATTR_BPSE(_mode, _show, _store) \
IIO_DEVICE_ATTR(bpse, _mode, _show, _store, 0)
/**
* IIO_DEV_ATTR_BPSE_AVAILABLE: no of bits per scan element supported
**/
#define IIO_DEV_ATTR_BPSE_AVAILABLE(_show) \
IIO_DEVICE_ATTR(bpse_available, S_IRUGO, _show, NULL, 0)
/**
* IIO_DEV_ATTR_TEMP: many sensors have auxiliary temperature sensors
**/
#define IIO_DEV_ATTR_TEMP(_show) \
IIO_DEVICE_ATTR(temp, S_IRUGO, _show, NULL, 0)
/**
* IIO_EVENT_SH: generic shared event handler
*
* This is used in cases where more than one event may result from a single
* handler. Often the case that some alarm register must be read and multiple
* alarms may have been triggered.
**/
#define IIO_EVENT_SH(_name, _handler) \
static struct iio_event_handler_list \
iio_event_##_name = { \
.handler = _handler, \
.refcount = 0, \
.exist_lock = __MUTEX_INITIALIZER(iio_event_##_name \
.exist_lock), \
.list = { \
.next = &iio_event_##_name.list, \
.prev = &iio_event_##_name.list, \
}, \
};
/**
* IIO_EVENT_ATTR_SH: generic shared event attribute
*
* An attribute with an associated IIO_EVENT_SH
**/
#define IIO_EVENT_ATTR_SH(_name, _ev_list, _show, _store, _mask) \
static struct iio_event_attr \
iio_event_attr_##_name \
= { .dev_attr = __ATTR(_name, S_IRUGO | S_IWUSR, \
_show, _store), \
.mask = _mask, \
.listel = &_ev_list };
/**
* IIO_EVENT_ATTR: non shared event attribute
**/
#define IIO_EVENT_ATTR(_name, _show, _store, _mask, _handler) \
static struct iio_event_handler_list \
iio_event_##_name = { \
.handler = _handler, \
}; \
static struct \
iio_event_attr \
iio_event_attr_##_name \
= { .dev_attr = __ATTR(_name, S_IRUGO | S_IWUSR, \
_show, _store), \
.mask = _mask, \
.listel = &iio_event_##_name }; \
/**
* IIO_EVENT_ATTR_DATA_RDY: event driven by data ready signal
*
* Not typically implemented in devices where full triggering support
* has been implemented
**/
#define IIO_EVENT_ATTR_DATA_RDY(_show, _store, _mask, _handler) \
IIO_EVENT_ATTR(data_rdy, _show, _store, _mask, _handler)
#define IIO_EVENT_CODE_DATA_RDY 100
#define IIO_EVENT_CODE_RING_BASE 200
#define IIO_EVENT_CODE_ACCEL_BASE 300
#define IIO_EVENT_CODE_GYRO_BASE 400
#define IIO_EVENT_CODE_ADC_BASE 500
#define IIO_EVENT_CODE_MISC_BASE 600
#define IIO_EVENT_CODE_DEVICE_SPECIFIC 1000
/**
* IIO_EVENT_ATTR_RING_50_FULL: ring buffer event to indicate 50% full
**/
#define IIO_EVENT_ATTR_RING_50_FULL(_show, _store, _mask, _handler) \
IIO_EVENT_ATTR(ring_50_full, _show, _store, _mask, _handler)
/**
* IIO_EVENT_ATTR_RING_50_FULL_SH: shared ring event to indicate 50% full
**/
#define IIO_EVENT_ATTR_RING_50_FULL_SH(_evlist, _show, _store, _mask) \
IIO_EVENT_ATTR_SH(ring_50_full, _evlist, _show, _store, _mask)
/**
* IIO_EVENT_ATTR_RING_75_FULL_SH: shared ring event to indicate 75% full
**/
#define IIO_EVENT_ATTR_RING_75_FULL_SH(_evlist, _show, _store, _mask) \
IIO_EVENT_ATTR_SH(ring_75_full, _evlist, _show, _store, _mask)
#define IIO_EVENT_CODE_RING_50_FULL IIO_EVENT_CODE_RING_BASE
#define IIO_EVENT_CODE_RING_75_FULL (IIO_EVENT_CODE_RING_BASE + 1)
#define IIO_EVENT_CODE_RING_100_FULL (IIO_EVENT_CODE_RING_BASE + 2)
#endif /* _INDUSTRIAL_IO_SYSFS_H_ */
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