294 lines
8.6 KiB
C
294 lines
8.6 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.
|
||
|
*
|
||
|
* 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_ */
|