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Staging: comedi: add pcl725 driver 

Driver for Advantech PCL-725 & compatibles

From: David Schleef <ds@schleef.org>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Schleef 2009-02-19 09:28:27 -08:00 committed by Greg Kroah-Hartman
parent 6baef15038
commit 501d675db6
1 changed files with 111 additions and 0 deletions
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111
drivers/staging/comedi/drivers/pcl725.c Normal file
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/*
* comedi/drivers/pcl725.c
* Driver for PCL725 and clones
* David A. Schleef
*/
/*
Driver: pcl725
Description: Advantech PCL-725 (& compatibles)
Author: ds
Status: unknown
Devices: [Advantech] PCL-725 (pcl725)
*/
#include "../comedidev.h"
#include <linux/ioport.h>
#define PCL725_SIZE 2
#define PCL725_DO 0
#define PCL725_DI 1
static int pcl725_attach(comedi_device * dev, comedi_devconfig * it);
static int pcl725_detach(comedi_device * dev);
static comedi_driver driver_pcl725 = {
driver_name:"pcl725",
module:THIS_MODULE,
attach:pcl725_attach,
detach:pcl725_detach,
};
COMEDI_INITCLEANUP(driver_pcl725);
static int pcl725_do_insn(comedi_device * dev, comedi_subdevice * s,
comedi_insn * insn, lsampl_t * data)
{
if (insn->n != 2)
return -EINVAL;
if (data[0]) {
s->state &= ~data[0];
s->state |= (data[0] & data[1]);
outb(s->state, dev->iobase + PCL725_DO);
}
data[1] = s->state;
return 2;
}
static int pcl725_di_insn(comedi_device * dev, comedi_subdevice * s,
comedi_insn * insn, lsampl_t * data)
{
if (insn->n != 2)
return -EINVAL;
data[1] = inb(dev->iobase + PCL725_DI);
return 2;
}
static int pcl725_attach(comedi_device * dev, comedi_devconfig * it)
{
comedi_subdevice *s;
unsigned long iobase;
iobase = it->options[0];
printk("comedi%d: pcl725: 0x%04lx ", dev->minor, iobase);
if (!request_region(iobase, PCL725_SIZE, "pcl725")) {
printk("I/O port conflict\n");
return -EIO;
}
dev->board_name = "pcl725";
dev->iobase = iobase;
dev->irq = 0;
if (alloc_subdevices(dev, 2) < 0)
return -ENOMEM;
s = dev->subdevices + 0;
/* do */
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
s->maxdata = 1;
s->n_chan = 8;
s->insn_bits = pcl725_do_insn;
s->range_table = &range_digital;
s = dev->subdevices + 1;
/* di */
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->maxdata = 1;
s->n_chan = 8;
s->insn_bits = pcl725_di_insn;
s->range_table = &range_digital;
printk("\n");
return 0;
}
static int pcl725_detach(comedi_device * dev)
{
printk("comedi%d: pcl725: remove\n", dev->minor);
if (dev->iobase)
release_region(dev->iobase, PCL725_SIZE);
return 0;
}