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/*
comedi/drivers/ke_counter.c
Comedi driver for Kolter-Electronic PCI Counter 1 Card
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 2000 David A. Schleef <ds@schleef.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
/*
Driver: ke_counter
Description: Driver for Kolter Electronic Counter Card
Devices: [Kolter Electronic] PCI Counter Card (ke_counter)
Author: Michael Hillmann
Updated: Mon, 14 Apr 2008 15:42:42 +0100
Status: tested
Configuration Options: not applicable, uses PCI auto config
This driver is a simple driver to read the counter values from
Kolter Electronic PCI Counter Card.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include "../comedidev.h"
#define CNT_CARD_DEVICE_ID 0x0014
/*-- counter write ----------------------------------------------------------*/
/* This should be used only for resetting the counters; maybe it is better
to make a special command 'reset'. */
static int cnt_winsn(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data)
{
int chan = CR_CHAN(insn->chanspec);
outb((unsigned char)((data[0] >> 24) & 0xff),
dev->iobase + chan * 0x20 + 0x10);
outb((unsigned char)((data[0] >> 16) & 0xff),
dev->iobase + chan * 0x20 + 0x0c);
outb((unsigned char)((data[0] >> 8) & 0xff),
dev->iobase + chan * 0x20 + 0x08);
outb((unsigned char)((data[0] >> 0) & 0xff),
dev->iobase + chan * 0x20 + 0x04);
/* return the number of samples written */
return 1;
}
/*-- counter read -----------------------------------------------------------*/
static int cnt_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data)
{
unsigned char a0, a1, a2, a3, a4;
int chan = CR_CHAN(insn->chanspec);
int result;
a0 = inb(dev->iobase + chan * 0x20);
a1 = inb(dev->iobase + chan * 0x20 + 0x04);
a2 = inb(dev->iobase + chan * 0x20 + 0x08);
a3 = inb(dev->iobase + chan * 0x20 + 0x0c);
a4 = inb(dev->iobase + chan * 0x20 + 0x10);
result = (a1 + (a2 * 256) + (a3 * 65536));
if (a4 > 0)
result = result - s->maxdata;
*data = (unsigned int)result;
/* return the number of samples read */
return 1;
}
static int cnt_auto_attach(struct comedi_device *dev,
unsigned long context_unused)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
struct comedi_subdevice *s;
int ret;
ret = comedi_pci_enable(dev);
if (ret)
return ret;
dev->iobase = pci_resource_start(pcidev, 0);
ret = comedi_alloc_subdevices(dev, 1);
if (ret)
return ret;
s = &dev->subdevices[0];
dev->read_subdev = s;
s->type = COMEDI_SUBD_COUNTER;
s->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ;
s->n_chan = 3;
s->maxdata = 0x00ffffff;
s->insn_read = cnt_rinsn;
s->insn_write = cnt_winsn;
/* select 20MHz clock */
outb(3, dev->iobase + 248);
/* reset all counters */
outb(0, dev->iobase);
outb(0, dev->iobase + 0x20);
outb(0, dev->iobase + 0x40);
dev_info(dev->class_dev, "%s: %s attached\n",
dev->driver->driver_name, dev->board_name);
return 0;
}
static struct comedi_driver ke_counter_driver = {
.driver_name = "ke_counter",
.module = THIS_MODULE,
.auto_attach = cnt_auto_attach,
.detach = comedi_pci_disable,
};
static int ke_counter_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &ke_counter_driver,
id->driver_data);
}
static const struct pci_device_id ke_counter_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, ke_counter_pci_table);
static struct pci_driver ke_counter_pci_driver = {
.name = "ke_counter",
.id_table = ke_counter_pci_table,
.probe = ke_counter_pci_probe,
.remove = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(ke_counter_driver, ke_counter_pci_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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