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/*
comedi/drivers/adq12b.c
driver for MicroAxial ADQ12-B data acquisition and control 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: adq12b
Description: driver for MicroAxial ADQ12-B data acquisition and control card
Devices: [MicroAxial] ADQ12-B (adq12b)
Author: jeremy theler <thelerg@ib.cnea.gov.ar>
Updated: Thu, 21 Feb 2008 02:56:27 -0300
Status: works
Driver for the acquisition card ADQ12-B (without any add-on).
- Analog input is subdevice 0 (16 channels single-ended or 8 differential)
- Digital input is subdevice 1 (5 channels)
- Digital output is subdevice 1 (8 channels)
- The PACER is not supported in this version
If you do not specify any options, they will default to
# comedi_config /dev/comedi0 adq12b 0x300,0,0
option 1: I/O base address. The following table is provided as a help
of the hardware jumpers.
address jumper JADR
0x300 1 (factory default)
0x320 2
0x340 3
0x360 4
0x380 5
0x3A0 6
option 2: unipolar/bipolar ADC selection: 0 -> bipolar, 1 -> unipolar
selection comedi_config option JUB
bipolar 0 2-3 (factory default)
unipolar 1 1-2
option 3: single-ended/differential AI selection: 0 -> SE, 1 -> differential
selection comedi_config option JCHA JCHB
single-ended 0 1-2 1-2 (factory default)
differential 1 2-3 2-3
written by jeremy theler <thelerg@ib.cnea.gov.ar>
instituto balseiro
commission nacional de energia atomica
universidad nacional de cuyo
argentina
21-feb-2008
+ changed supported devices string (missused the [] and ())
13-oct-2007
+ first try
*/
#include <linux/module.h>
#include <linux/delay.h>
#include "../comedidev.h"
/* address scheme (page 2.17 of the manual) */
#define ADQ12B_CTREG 0x00
#define ADQ12B_CTREG_MSKP (1 << 7) /* enable pacer interrupt */
#define ADQ12B_CTREG_GTP (1 << 6) /* enable pacer */
#define ADQ12B_CTREG_RANGE(x) ((x) << 4)
#define ADQ12B_CTREG_CHAN(x) ((x) << 0)
#define ADQ12B_STINR 0x00
#define ADQ12B_STINR_OUT2 (1 << 7) /* timer 2 output state */
#define ADQ12B_STINR_OUTP (1 << 6) /* pacer output state */
#define ADQ12B_STINR_EOC (1 << 5) /* A/D end-of-conversion */
#define ADQ12B_STINR_IN_MASK (0x1f << 0)
#define ADQ12B_OUTBR 0x04
#define ADQ12B_ADLOW 0x08
#define ADQ12B_ADHIG 0x09
#define ADQ12B_TIMER_BASE 0x0c
/* available ranges through the PGA gains */
static const struct comedi_lrange range_adq12b_ai_bipolar = {
4, {
BIP_RANGE(5),
BIP_RANGE(2),
BIP_RANGE(1),
BIP_RANGE(0.5)
}
};
static const struct comedi_lrange range_adq12b_ai_unipolar = {
4, {
UNI_RANGE(5),
UNI_RANGE(2),
UNI_RANGE(1),
UNI_RANGE(0.5)
}
};
struct adq12b_private {
unsigned int last_ctreg;
};
static int adq12b_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned char status;
status = inb(dev->iobase + ADQ12B_STINR);
if (status & ADQ12B_STINR_EOC)
return 0;
return -EBUSY;
}
static int adq12b_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct adq12b_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int range = CR_RANGE(insn->chanspec);
unsigned int val;
int ret;
int i;
/* change channel and range only if it is different from the previous */
val = ADQ12B_CTREG_RANGE(range) | ADQ12B_CTREG_CHAN(chan);
if (val != devpriv->last_ctreg) {
outb(val, dev->iobase + ADQ12B_CTREG);
devpriv->last_ctreg = val;
udelay(50); /* wait for the mux to settle */
}
val = inb(dev->iobase + ADQ12B_ADLOW); /* trigger A/D */
for (i = 0; i < insn->n; i++) {
ret = comedi_timeout(dev, s, insn, adq12b_ai_eoc, 0);
if (ret)
return ret;
val = inb(dev->iobase + ADQ12B_ADHIG) << 8;
val |= inb(dev->iobase + ADQ12B_ADLOW); /* retriggers A/D */
data[i] = val;
}
return insn->n;
}
static int adq12b_di_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
/* only bits 0-4 have information about digital inputs */
data[1] = (inb(dev->iobase + ADQ12B_STINR) & ADQ12B_STINR_IN_MASK);
return insn->n;
}
static int adq12b_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int mask;
unsigned int chan;
unsigned int val;
mask = comedi_dio_update_state(s, data);
if (mask) {
for (chan = 0; chan < 8; chan++) {
if ((mask >> chan) & 0x01) {
val = (s->state >> chan) & 0x01;
outb((val << 3) | chan,
dev->iobase + ADQ12B_OUTBR);
}
}
}
data[1] = s->state;
return insn->n;
}
static int adq12b_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct adq12b_private *devpriv;
struct comedi_subdevice *s;
int ret;
ret = comedi_request_region(dev, it->options[0], 0x10);
if (ret)
return ret;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
devpriv->last_ctreg = -1; /* force ctreg update */
ret = comedi_alloc_subdevices(dev, 3);
if (ret)
return ret;
/* Analog Input subdevice */
s = &dev->subdevices[0];
s->type = COMEDI_SUBD_AI;
if (it->options[2]) {
s->subdev_flags = SDF_READABLE | SDF_DIFF;
s->n_chan = 8;
} else {
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = 16;
}
s->maxdata = 0xfff;
s->range_table = it->options[1] ? &range_adq12b_ai_unipolar
: &range_adq12b_ai_bipolar;
s->insn_read = adq12b_ai_insn_read;
/* Digital Input subdevice */
s = &dev->subdevices[1];
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 5;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = adq12b_di_insn_bits;
/* Digital Output subdevice */
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 8;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = adq12b_do_insn_bits;
return 0;
}
static struct comedi_driver adq12b_driver = {
.driver_name = "adq12b",
.module = THIS_MODULE,
.attach = adq12b_attach,
.detach = comedi_legacy_detach,
};
module_comedi_driver(adq12b_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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