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02db0bb33a
These events are no longer passed up to userspace. ad7745 - was using these events to indicate directly dataready events. I'm not sure when it ever makes sense to push these to userspace so for now I've taken them to event codes 0 and 1 until someone has time to make this driver do something more standard. (they were arbitary before, they still are, be it in a different way!) Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
222 lines
7 KiB
C
222 lines
7 KiB
C
/* 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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* General attributes
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*/
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#ifndef _INDUSTRIAL_IO_SYSFS_H_
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#define _INDUSTRIAL_IO_SYSFS_H_
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#include "iio.h"
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/**
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* struct iio_dev_attr - iio specific device attribute
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* @dev_attr: underlying device attribute
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* @address: associated register address
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* @val2: secondary attribute value
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* @l: list head for maintaining list of dynamically created attrs.
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*/
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struct iio_dev_attr {
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struct device_attribute dev_attr;
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int address;
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int val2;
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struct list_head l;
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struct iio_chan_spec const *c;
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};
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#define to_iio_dev_attr(_dev_attr) \
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container_of(_dev_attr, struct iio_dev_attr, dev_attr)
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ssize_t iio_read_const_attr(struct device *dev,
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struct device_attribute *attr,
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char *len);
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/**
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* struct iio_const_attr - constant device specific attribute
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* often used for things like available modes
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* @string: attribute string
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* @dev_attr: underlying device attribute
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*/
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struct iio_const_attr {
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const char *string;
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struct device_attribute dev_attr;
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};
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#define to_iio_const_attr(_dev_attr) \
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container_of(_dev_attr, struct iio_const_attr, dev_attr)
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/* Some attributes will be hard coded (device dependent) and not require an
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address, in these cases pass a negative */
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#define IIO_ATTR(_name, _mode, _show, _store, _addr) \
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{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
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.address = _addr }
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#define IIO_DEVICE_ATTR(_name, _mode, _show, _store, _addr) \
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struct iio_dev_attr iio_dev_attr_##_name \
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= IIO_ATTR(_name, _mode, _show, _store, _addr)
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#define IIO_DEVICE_ATTR_NAMED(_vname, _name, _mode, _show, _store, _addr) \
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struct iio_dev_attr iio_dev_attr_##_vname \
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= IIO_ATTR(_name, _mode, _show, _store, _addr)
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#define IIO_DEVICE_ATTR_2(_name, _mode, _show, _store, _addr, _val2) \
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struct iio_dev_attr iio_dev_attr_##_name \
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= IIO_ATTR_2(_name, _mode, _show, _store, _addr, _val2)
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#define IIO_CONST_ATTR(_name, _string) \
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struct iio_const_attr iio_const_attr_##_name \
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= { .string = _string, \
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.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
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#define IIO_CONST_ATTR_NAMED(_vname, _name, _string) \
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struct iio_const_attr iio_const_attr_##_vname \
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= { .string = _string, \
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.dev_attr = __ATTR(_name, S_IRUGO, iio_read_const_attr, NULL)}
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/* Generic attributes of onetype or another */
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/**
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* IIO_DEV_ATTR_REV - revision number for the device
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* @_show: output method for the attribute
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*
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* Very much device dependent.
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**/
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#define IIO_DEV_ATTR_REV(_show) \
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IIO_DEVICE_ATTR(revision, S_IRUGO, _show, NULL, 0)
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/**
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* IIO_DEV_ATTR_RESET: resets the device
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**/
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#define IIO_DEV_ATTR_RESET(_store) \
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IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, _store, 0)
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/**
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* IIO_CONST_ATTR_NAME - constant identifier
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* @_string: the name
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**/
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#define IIO_CONST_ATTR_NAME(_string) \
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IIO_CONST_ATTR(name, _string)
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/**
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* IIO_DEV_ATTR_SAMP_FREQ - sets any internal clock frequency
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* @_mode: sysfs file mode/permissions
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* @_show: output method for the attribute
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* @_store: input method for the attribute
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**/
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#define IIO_DEV_ATTR_SAMP_FREQ(_mode, _show, _store) \
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IIO_DEVICE_ATTR(sampling_frequency, _mode, _show, _store, 0)
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/**
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* IIO_DEV_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies
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* @_show: output method for the attribute
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*
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* May be mode dependent on some devices
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**/
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/* Deprecated */
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#define IIO_DEV_ATTR_AVAIL_SAMP_FREQ(_show) \
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IIO_DEVICE_ATTR(available_sampling_frequency, S_IRUGO, _show, NULL, 0)
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#define IIO_DEV_ATTR_SAMP_FREQ_AVAIL(_show) \
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IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, _show, NULL, 0)
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/**
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* IIO_CONST_ATTR_AVAIL_SAMP_FREQ - list available sampling frequencies
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* @_string: frequency string for the attribute
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*
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* Constant version
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**/
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#define IIO_CONST_ATTR_SAMP_FREQ_AVAIL(_string) \
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IIO_CONST_ATTR(sampling_frequency_available, _string)
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/**
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* IIO_DEV_ATTR_SW_RING_ENABLE - enable software ring buffer
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* @_show: output method for the attribute
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* @_store: input method for the attribute
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*
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* Success may be dependent on attachment of trigger previously.
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**/
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#define IIO_DEV_ATTR_SW_RING_ENABLE(_show, _store) \
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IIO_DEVICE_ATTR(sw_ring_enable, S_IRUGO | S_IWUSR, _show, _store, 0)
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/**
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* IIO_DEV_ATTR_HW_RING_ENABLE - enable hardware ring buffer
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* @_show: output method for the attribute
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* @_store: input method for the attribute
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*
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* This is a different attribute from the software one as one can envision
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* schemes where a combination of the two may be used.
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**/
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#define IIO_DEV_ATTR_HW_RING_ENABLE(_show, _store) \
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IIO_DEVICE_ATTR(hw_ring_enable, S_IRUGO | S_IWUSR, _show, _store, 0)
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#define IIO_DEV_ATTR_TEMP_RAW(_show) \
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IIO_DEVICE_ATTR(temp_raw, S_IRUGO, _show, NULL, 0)
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#define IIO_CONST_ATTR_TEMP_OFFSET(_string) \
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IIO_CONST_ATTR(temp_offset, _string)
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#define IIO_CONST_ATTR_TEMP_SCALE(_string) \
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IIO_CONST_ATTR(temp_scale, _string)
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/* must match our channel defs */
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#define IIO_EV_CLASS_IN IIO_IN
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#define IIO_EV_CLASS_IN_DIFF IIO_IN_DIFF
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#define IIO_EV_CLASS_ACCEL IIO_ACCEL
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#define IIO_EV_CLASS_GYRO IIO_GYRO
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#define IIO_EV_CLASS_MAGN IIO_MAGN
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#define IIO_EV_CLASS_LIGHT IIO_LIGHT
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#define IIO_EV_CLASS_PROXIMITY IIO_PROXIMITY
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#define IIO_EV_CLASS_TEMP IIO_TEMP
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#define IIO_EV_MOD_X IIO_MOD_X
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#define IIO_EV_MOD_Y IIO_MOD_Y
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#define IIO_EV_MOD_Z IIO_MOD_Z
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#define IIO_EV_MOD_X_AND_Y IIO_MOD_X_AND_Y
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#define IIO_EV_MOD_X_ANX_Z IIO_MOD_X_AND_Z
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#define IIO_EV_MOD_Y_AND_Z IIO_MOD_Y_AND_Z
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#define IIO_EV_MOD_X_AND_Y_AND_Z IIO_MOD_X_AND_Y_AND_Z
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#define IIO_EV_MOD_X_OR_Y IIO_MOD_X_OR_Y
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#define IIO_EV_MOD_X_OR_Z IIO_MOD_X_OR_Z
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#define IIO_EV_MOD_Y_OR_Z IIO_MOD_Y_OR_Z
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#define IIO_EV_MOD_X_OR_Y_OR_Z IIO_MOD_X_OR_Y_OR_Z
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#define IIO_EV_TYPE_THRESH 0
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#define IIO_EV_TYPE_MAG 1
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#define IIO_EV_TYPE_ROC 2
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#define IIO_EV_DIR_EITHER 0
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#define IIO_EV_DIR_RISING 1
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#define IIO_EV_DIR_FALLING 2
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#define IIO_EV_TYPE_MAX 8
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#define IIO_EV_BIT(type, direction) \
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(1 << (type*IIO_EV_TYPE_MAX + direction))
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#define IIO_EVENT_CODE(channelclass, orient_bit, number, \
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modifier, type, direction) \
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(channelclass | (orient_bit << 8) | ((number) << 9) | \
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((modifier) << 13) | ((type) << 16) | ((direction) << 24))
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#define IIO_MOD_EVENT_CODE(channelclass, number, modifier, \
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type, direction) \
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IIO_EVENT_CODE(channelclass, 1, number, modifier, type, direction)
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#define IIO_UNMOD_EVENT_CODE(channelclass, number, type, direction) \
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IIO_EVENT_CODE(channelclass, 0, number, 0, type, direction)
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#define IIO_BUFFER_EVENT_CODE(code) \
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(IIO_EV_CLASS_BUFFER | (code << 8))
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#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 24) & 0xf)
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/* Event code number extraction depends on which type of event we have.
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* Perhaps review this function in the future*/
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#define IIO_EVENT_CODE_EXTRACT_NUM(mask) ((mask >> 9) & 0x0f)
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#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 13) & 0x7)
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#endif /* _INDUSTRIAL_IO_SYSFS_H_ */
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