drivers/comedi/drivers/ni_labpc_cs.c

Source file repositories/reference/linux-study-clean/drivers/comedi/drivers/ni_labpc_cs.c

File Facts

System
Linux kernel
Corpus path
drivers/comedi/drivers/ni_labpc_cs.c
Extension
.c
Size
3323 bytes
Lines
112
Domain
Driver Families
Bucket
drivers/comedi
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0+
/*
 * Driver for National Instruments daqcard-1200 boards
 * Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
 *
 * PCMCIA crap is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13
 * from the pcmcia package.
 * The initial developer of the pcmcia dummy_cs.c code is David A. Hinds
 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 * are Copyright (C) 1999 David A. Hinds.
 */

/*
 * Driver: ni_labpc_cs
 * Description: National Instruments Lab-PC (& compatibles)
 * Author: Frank Mori Hess <fmhess@users.sourceforge.net>
 * Devices: [National Instruments] DAQCard-1200 (daqcard-1200)
 * Status: works
 *
 * Thanks go to Fredrik Lingvall for much testing and perseverance in
 * helping to debug daqcard-1200 support.
 *
 * The 1200 series boards have onboard calibration dacs for correcting
 * analog input/output offsets and gains. The proper settings for these
 * caldacs are stored on the board's eeprom. To read the caldac values
 * from the eeprom and store them into a file that can be then be used by
 * comedilib, use the comedi_calibrate program.
 *
 * Configuration options: none
 *
 * The daqcard-1200 has quirky chanlist requirements when scanning multiple
 * channels. Multiple channel scan sequence must start at highest channel,
 * then decrement down to channel 0.  Chanlists consisting of all one channel
 * are also legal, and allow you to pace conversions in bursts.
 *
 * NI manuals:
 *   340988a (daqcard-1200)
 */

#include <linux/module.h>
#include <linux/comedi/comedi_pcmcia.h>

#include "ni_labpc.h"

static const struct labpc_boardinfo labpc_cs_boards[] = {
	{
		.name			= "daqcard-1200",
		.ai_speed		= 10000,
		.has_ao			= 1,
		.is_labpc1200		= 1,
	},
};

static int labpc_cs_auto_attach(struct comedi_device *dev,
				unsigned long context)
{
	struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
	int ret;

	/* The ni_labpc driver needs the board_ptr */
	dev->board_ptr = &labpc_cs_boards[0];

	link->config_flags |= CONF_AUTO_SET_IO |
			      CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
	ret = comedi_pcmcia_enable(dev, NULL);
	if (ret)
		return ret;
	dev->iobase = link->resource[0]->start;

	if (!link->irq)
		return -EINVAL;

	return labpc_common_attach(dev, link->irq, IRQF_SHARED);
}

static void labpc_cs_detach(struct comedi_device *dev)
{
	labpc_common_detach(dev);
	comedi_pcmcia_disable(dev);
}

static struct comedi_driver driver_labpc_cs = {
	.driver_name	= "ni_labpc_cs",
	.module		= THIS_MODULE,
	.auto_attach	= labpc_cs_auto_attach,
	.detach		= labpc_cs_detach,
};

static int labpc_cs_attach(struct pcmcia_device *link)
{

Annotation

Implementation Notes