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/*
* fl512.c
* Anders Gnistrup <ex18@kalman.iau.dtu.dk>
*
* 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: fl512
* Description: unknown
* Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
* Devices: [unknown] FL512 (fl512)
* Status: unknown
*
* Digital I/O is not supported.
*
* Configuration options:
* [0] - I/O port base address
*/
#include <linux/module.h>
#include "../comedidev.h"
#include <linux/delay.h>
/*
* Register I/O map
*/
#define FL512_AI_LSB_REG 0x02
#define FL512_AI_MSB_REG 0x03
#define FL512_AI_MUX_REG 0x02
#define FL512_AI_START_CONV_REG 0x03
#define FL512_AO_DATA_REG(x) (0x04 + ((x) * 2))
#define FL512_AO_TRIG_REG(x) (0x04 + ((x) * 2))
struct fl512_private {
unsigned short ao_readback[2];
};
static const struct comedi_lrange range_fl512 = {
4, {
BIP_RANGE(0.5),
BIP_RANGE(1),
BIP_RANGE(5),
BIP_RANGE(10),
UNI_RANGE(1),
UNI_RANGE(5),
UNI_RANGE(10)
}
};
static int fl512_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val;
int i;
outb(chan, dev->iobase + FL512_AI_MUX_REG);
for (i = 0; i < insn->n; i++) {
outb(0, dev->iobase + FL512_AI_START_CONV_REG);
/* XXX should test "done" flag instead of delay */
udelay(30);
val = inb(dev->iobase + FL512_AI_LSB_REG);
val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8);
val &= s->maxdata;
data[i] = val;
}
return insn->n;
}
static int fl512_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct fl512_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val = devpriv->ao_readback[chan];
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
/* write LSB, MSB then trigger conversion */
outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan));
outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan));
inb(dev->iobase + FL512_AO_TRIG_REG(chan));
}
devpriv->ao_readback[chan] = val;
return insn->n;
}
static int fl512_ao_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct fl512_private *devpriv = dev->private;
unsigned int chan = CR_CHAN(insn->chanspec);
int i;
for (i = 0; i < insn->n; i++)
data[i] = devpriv->ao_readback[chan];
return insn->n;
}
static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct fl512_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;
ret = comedi_alloc_subdevices(dev, 2);
if (ret)
return ret;
/* Analog Input subdevice */
s = &dev->subdevices[0];
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = 16;
s->maxdata = 0x0fff;
s->range_table = &range_fl512;
s->insn_read = fl512_ai_insn_read;
/* Analog Output subdevice */
s = &dev->subdevices[1];
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->maxdata = 0x0fff;
s->range_table = &range_fl512;
s->insn_write = fl512_ao_insn_write;
s->insn_read = fl512_ao_insn_read;
return 0;
}
static struct comedi_driver fl512_driver = {
.driver_name = "fl512",
.module = THIS_MODULE,
.attach = fl512_attach,
.detach = comedi_legacy_detach,
};
module_comedi_driver(fl512_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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