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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* comedilib.h
* Header file for kcomedilib
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1998-2001 David A. Schleef <ds@schleef.org>
*/
#ifndef _LINUX_COMEDILIB_H
#define _LINUX_COMEDILIB_H
struct comedi_device *comedi_open_from(const char *path, int from);
/**
* comedi_open() - Open a COMEDI device from the kernel
* @filename: Fake pathname of the form "/dev/comediN".
*
* Converts @filename to a COMEDI device number and "opens" it if it exists
* and is attached to a low-level COMEDI driver.
*
* Return: A pointer to the COMEDI device on success.
* Return %NULL on failure.
*/
static inline struct comedi_device *comedi_open(const char *path)
{
return comedi_open_from(path, -1);
}
int comedi_close_from(struct comedi_device *dev, int from);
/**
* comedi_close() - Close a COMEDI device from the kernel
* @dev: COMEDI device.
*
* Closes a COMEDI device previously opened by comedi_open().
*
* Returns: 0
*/
static inline int comedi_close(struct comedi_device *dev)
{
return comedi_close_from(dev, -1);
}
int comedi_dio_get_config(struct comedi_device *dev, unsigned int subdev,
unsigned int chan, unsigned int *io);
int comedi_dio_config(struct comedi_device *dev, unsigned int subdev,
unsigned int chan, unsigned int io);
int comedi_dio_bitfield2(struct comedi_device *dev, unsigned int subdev,
unsigned int mask, unsigned int *bits,
unsigned int base_channel);
int comedi_find_subdevice_by_type(struct comedi_device *dev, int type,
unsigned int subd);
int comedi_get_n_channels(struct comedi_device *dev, unsigned int subdevice);
#endif
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