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comedi/drivers/cb_pcimdas.c
Comedi driver for Computer Boards PCIM-DAS1602/16
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: cb_pcimdas
Description: Measurement Computing PCI Migration series boards
Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas)
Author: Richard Bytheway
Updated: Wed, 13 Nov 2002 12:34:56 +0000
Status: experimental
Written to support the PCIM-DAS1602/16 on a 2.4 series kernel.
Configuration Options:
[0] - PCI bus number
[1] - PCI slot number
Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org).
Only supports DIO, AO and simple AI in it's present form.
No interrupts, multi channel or FIFO AI,
although the card looks like it could support this.
See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include "../comedidev.h"
#include "plx9052.h"
#include "8255.h"
/* Registers for the PCIM-DAS1602/16 */
/* DAC Offsets */
#define ADC_TRIG 0
#define DAC0_OFFSET 2
#define DAC1_OFFSET 4
/* AI and Counter Constants */
#define MUX_LIMITS 0
#define MAIN_CONN_DIO 1
#define ADC_STAT 2
#define ADC_CONV_STAT 3
#define ADC_INT 4
#define ADC_PACER 5
#define BURST_MODE 6
#define PROG_GAIN 7
#define CLK8254_1_DATA 8
#define CLK8254_2_DATA 9
#define CLK8254_3_DATA 10
#define CLK8254_CONTROL 11
#define USER_COUNTER 12
#define RESID_COUNT_H 13
#define RESID_COUNT_L 14
/*
* this structure is for data unique to this hardware driver. If
* several hardware drivers keep similar information in this structure,
* feel free to suggest moving the variable to the struct comedi_device
* struct.
*/
struct cb_pcimdas_private {
/* base addresses */
unsigned long daqio;
unsigned long BADR3;
};
static int cb_pcimdas_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
struct cb_pcimdas_private *devpriv = dev->private;
unsigned int status;
status = inb(devpriv->BADR3 + 2);
if ((status & 0x80) == 0)
return 0;
return -EBUSY;
}
static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
struct cb_pcimdas_private *devpriv = dev->private;
int n;
unsigned int d;
int chan = CR_CHAN(insn->chanspec);
unsigned short chanlims;
int maxchans;
int ret;
/* only support sw initiated reads from a single channel */
/* check channel number */
if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */
maxchans = s->n_chan / 2;
else
maxchans = s->n_chan;
if (chan > (maxchans - 1))
return -ETIMEDOUT; /* *** Wrong error code. Fixme. */
/* configure for sw initiated read */
d = inb(devpriv->BADR3 + 5);
if ((d & 0x03) > 0) { /* only reset if needed. */
d = d & 0xfd;
outb(d, devpriv->BADR3 + 5);
}
/* set bursting off, conversions on */
outb(0x01, devpriv->BADR3 + 6);
/* set range to 10V. UP/BP is controlled by a switch on the board */
outb(0x00, devpriv->BADR3 + 7);
/*
* write channel limits to multiplexer, set Low (bits 0-3) and
* High (bits 4-7) channels to chan.
*/
chanlims = chan | (chan << 4);
outb(chanlims, devpriv->BADR3 + 0);
/* convert n samples */
for (n = 0; n < insn->n; n++) {
/* trigger conversion */
outw(0, devpriv->daqio + 0);
/* wait for conversion to end */
ret = comedi_timeout(dev, s, insn, cb_pcimdas_ai_eoc, 0);
if (ret)
return ret;
/* read data */
data[n] = inw(devpriv->daqio + 0);
}
/* return the number of samples read/written */
return n;
}
static int cb_pcimdas_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct cb_pcimdas_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val = s->readback[chan];
unsigned int reg = (chan) ? DAC1_OFFSET : DAC0_OFFSET;
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
outw(val, devpriv->daqio + reg);
}
s->readback[chan] = val;
return insn->n;
}
static int cb_pcimdas_auto_attach(struct comedi_device *dev,
unsigned long context_unused)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
struct cb_pcimdas_private *devpriv;
struct comedi_subdevice *s;
int ret;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
ret = comedi_pci_enable(dev);
if (ret)
return ret;
devpriv->daqio = pci_resource_start(pcidev, 2);
devpriv->BADR3 = pci_resource_start(pcidev, 3);
dev->iobase = pci_resource_start(pcidev, 4);
ret = comedi_alloc_subdevices(dev, 3);
if (ret)
return ret;
s = &dev->subdevices[0];
/* dev->read_subdev=s; */
/* analog input subdevice */
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = 16;
s->maxdata = 0xffff;
s->range_table = &range_unknown;
s->len_chanlist = 1; /* This is the maximum chanlist length that */
/* the board can handle */
s->insn_read = cb_pcimdas_ai_rinsn;
s = &dev->subdevices[1];
/* analog output subdevice */
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->maxdata = 0xfff;
/* ranges are hardware settable, but not software readable. */
s->range_table = &range_unknown;
s->insn_write = cb_pcimdas_ao_insn_write;
s->insn_read = comedi_readback_insn_read;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
s = &dev->subdevices[2];
/* digital i/o subdevice */
ret = subdev_8255_init(dev, s, NULL, 0x00);
if (ret)
return ret;
return 0;
}
static struct comedi_driver cb_pcimdas_driver = {
.driver_name = "cb_pcimdas",
.module = THIS_MODULE,
.auto_attach = cb_pcimdas_auto_attach,
.detach = comedi_pci_detach,
};
static int cb_pcimdas_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &cb_pcimdas_driver,
id->driver_data);
}
static const struct pci_device_id cb_pcimdas_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_CB, 0x0056) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
static struct pci_driver cb_pcimdas_pci_driver = {
.name = "cb_pcimdas",
.id_table = cb_pcimdas_pci_table,
.probe = cb_pcimdas_pci_probe,
.remove = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(cb_pcimdas_driver, cb_pcimdas_pci_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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