linux/drivers/comedi/drivers/ni_labpc_isadma.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * comedi/drivers/ni_labpc_isadma.c
 * ISA DMA support for National Instruments Lab-PC series boards and
 * compatibles.
 *
 * Extracted from ni_labpc.c:
 * Copyright (C) 2001-2003 Frank Mori Hess <[email protected]>
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/comedi/comedidev.h>
#include <linux/comedi/comedi_isadma.h>

#include "ni_labpc.h"
#include "ni_labpc_regs.h"
#include "ni_labpc_isadma.h"

/* size in bytes of dma buffer */
#define LABPC_ISADMA_BUFFER_SIZE …

/* utility function that suggests a dma transfer size in bytes */
static unsigned int labpc_suggest_transfer_size(struct comedi_device *dev,
						struct comedi_subdevice *s,
						unsigned int maxbytes)
{ … }

void labpc_setup_dma(struct comedi_device *dev, struct comedi_subdevice *s)
{ … }
EXPORT_SYMBOL_GPL(…);

void labpc_drain_dma(struct comedi_device *dev)
{ … }
EXPORT_SYMBOL_GPL(…);

static void handle_isa_dma(struct comedi_device *dev)
{ … }

void labpc_handle_dma_status(struct comedi_device *dev)
{ … }
EXPORT_SYMBOL_GPL(…);

void labpc_init_dma_chan(struct comedi_device *dev, unsigned int dma_chan)
{ … }
EXPORT_SYMBOL_GPL(…);

void labpc_free_dma_chan(struct comedi_device *dev)
{ … }
EXPORT_SYMBOL_GPL(…);

static int __init ni_labpc_isadma_init_module(void)
{ … }
module_init(…) …;

static void __exit ni_labpc_isadma_cleanup_module(void)
{ … }
module_exit(ni_labpc_isadma_cleanup_module);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;