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comedi/drivers/dt2811.c
Hardware driver for Data Translation DT2811
COMEDI - Linux Control and Measurement Device Interface
History:
Base Version - David A. Schleef <ds@schleef.org>
December 1998 - Updated to work. David does not have a DT2811
board any longer so this was suffering from bitrot.
Updated performed by ...
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: dt2811
Description: Data Translation DT2811
Author: ds
Devices: [Data Translation] DT2811-PGL (dt2811-pgl), DT2811-PGH (dt2811-pgh)
Status: works
Configuration options:
[0] - I/O port base address
[1] - IRQ, although this is currently unused
[2] - A/D reference
0 = signle-ended
1 = differential
2 = pseudo-differential (common reference)
[3] - A/D range
0 = [-5, 5]
1 = [-2.5, 2.5]
2 = [0, 5]
[4] - D/A 0 range (same choices)
[4] - D/A 1 range (same choices)
*/
#include <linux/module.h>
#include "../comedidev.h"
static const struct comedi_lrange range_dt2811_pgh_ai_5_unipolar = {
4, {
UNI_RANGE(5),
UNI_RANGE(2.5),
UNI_RANGE(1.25),
UNI_RANGE(0.625)
}
};
static const struct comedi_lrange range_dt2811_pgh_ai_2_5_bipolar = {
4, {
BIP_RANGE(2.5),
BIP_RANGE(1.25),
BIP_RANGE(0.625),
BIP_RANGE(0.3125)
}
};
static const struct comedi_lrange range_dt2811_pgh_ai_5_bipolar = {
4, {
BIP_RANGE(5),
BIP_RANGE(2.5),
BIP_RANGE(1.25),
BIP_RANGE(0.625)
}
};
static const struct comedi_lrange range_dt2811_pgl_ai_5_unipolar = {
4, {
UNI_RANGE(5),
UNI_RANGE(0.5),
UNI_RANGE(0.05),
UNI_RANGE(0.01)
}
};
static const struct comedi_lrange range_dt2811_pgl_ai_2_5_bipolar = {
4, {
BIP_RANGE(2.5),
BIP_RANGE(0.25),
BIP_RANGE(0.025),
BIP_RANGE(0.005)
}
};
static const struct comedi_lrange range_dt2811_pgl_ai_5_bipolar = {
4, {
BIP_RANGE(5),
BIP_RANGE(0.5),
BIP_RANGE(0.05),
BIP_RANGE(0.01)
}
};
/*
0x00 ADCSR R/W A/D Control/Status Register
bit 7 - (R) 1 indicates A/D conversion done
reading ADDAT clears bit
(W) ignored
bit 6 - (R) 1 indicates A/D error
(W) ignored
bit 5 - (R) 1 indicates A/D busy, cleared at end
of conversion
(W) ignored
bit 4 - (R) 0
(W)
bit 3 - (R) 0
bit 2 - (R/W) 1 indicates interrupts enabled
bits 1,0 - (R/W) mode bits
00 single conversion on ADGCR load
01 continuous conversion, internal clock,
(clock enabled on ADGCR load)
10 continuous conversion, internal clock,
external trigger
11 continuous conversion, external clock,
external trigger
0x01 ADGCR R/W A/D Gain/Channel Register
bit 6,7 - (R/W) gain select
00 gain=1, both PGH, PGL models
01 gain=2 PGH, 10 PGL
10 gain=4 PGH, 100 PGL
11 gain=8 PGH, 500 PGL
bit 4,5 - reserved
bit 3-0 - (R/W) channel select
channel number from 0-15
0x02,0x03 (R) ADDAT A/D Data Register
(W) DADAT0 D/A Data Register 0
0x02 low byte
0x03 high byte
0x04,0x05 (W) DADAT0 D/A Data Register 1
0x06 (R) DIO0 Digital Input Port 0
(W) DIO1 Digital Output Port 1
0x07 TMRCTR (R/W) Timer/Counter Register
bits 6,7 - reserved
bits 5-3 - Timer frequency control (mantissa)
543 divisor freqency (kHz)
000 1 600
001 10 60
010 2 300
011 3 200
100 4 150
101 5 120
110 6 100
111 12 50
bits 2-0 - Timer frequency control (exponent)
210 multiply divisor/divide frequency by
000 1
001 10
010 100
011 1000
100 10000
101 100000
110 1000000
111 10000000
*/
#define TIMEOUT 10000
#define DT2811_ADCSR 0
#define DT2811_ADGCR 1
#define DT2811_ADDATLO 2
#define DT2811_ADDATHI 3
#define DT2811_DADAT0LO 2
#define DT2811_DADAT0HI 3
#define DT2811_DADAT1LO 4
#define DT2811_DADAT1HI 5
#define DT2811_DIO 6
#define DT2811_TMRCTR 7
/*
* flags
*/
/* ADCSR */
#define DT2811_ADDONE 0x80
#define DT2811_ADERROR 0x40
#define DT2811_ADBUSY 0x20
#define DT2811_CLRERROR 0x10
#define DT2811_INTENB 0x04
#define DT2811_ADMODE 0x03
struct dt2811_board {
const char *name;
const struct comedi_lrange *bip_5;
const struct comedi_lrange *bip_2_5;
const struct comedi_lrange *unip_5;
};
enum { card_2811_pgh, card_2811_pgl };
struct dt2811_private {
int ntrig;
int curadchan;
enum {
adc_singleended, adc_diff, adc_pseudo_diff
} adc_mux;
enum {
dac_bipolar_5, dac_bipolar_2_5, dac_unipolar_5
} dac_range[2];
const struct comedi_lrange *range_type_list[2];
};
static const struct comedi_lrange *dac_range_types[] = {
&range_bipolar5,
&range_bipolar2_5,
&range_unipolar5
};
static int dt2811_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned int status;
status = inb(dev->iobase + DT2811_ADCSR);
if ((status & DT2811_ADBUSY) == 0)
return 0;
return -EBUSY;
}
static int dt2811_ai_insn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int chan = CR_CHAN(insn->chanspec);
int ret;
int i;
for (i = 0; i < insn->n; i++) {
outb(chan, dev->iobase + DT2811_ADGCR);
ret = comedi_timeout(dev, s, insn, dt2811_ai_eoc, 0);
if (ret)
return ret;
data[i] = inb(dev->iobase + DT2811_ADDATLO);
data[i] |= inb(dev->iobase + DT2811_ADDATHI) << 8;
data[i] &= 0xfff;
}
return i;
}
static int dt2811_ao_insn_write(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 = s->readback[chan];
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
outb(val & 0xff, dev->iobase + DT2811_DADAT0LO + 2 * chan);
outb((val >> 8) & 0xff,
dev->iobase + DT2811_DADAT0HI + 2 * chan);
}
s->readback[chan] = val;
return insn->n;
}
static int dt2811_di_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
data[1] = inb(dev->iobase + DT2811_DIO);
return insn->n;
}
static int dt2811_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
if (comedi_dio_update_state(s, data))
outb(s->state, dev->iobase + DT2811_DIO);
data[1] = s->state;
return insn->n;
}
/*
options[0] Board base address
options[1] IRQ
options[2] Input configuration
0 == single-ended
1 == differential
2 == pseudo-differential
options[3] Analog input range configuration
0 == bipolar 5 (-5V -- +5V)
1 == bipolar 2.5V (-2.5V -- +2.5V)
2 == unipolar 5V (0V -- +5V)
options[4] Analog output 0 range configuration
0 == bipolar 5 (-5V -- +5V)
1 == bipolar 2.5V (-2.5V -- +2.5V)
2 == unipolar 5V (0V -- +5V)
options[5] Analog output 1 range configuration
0 == bipolar 5 (-5V -- +5V)
1 == bipolar 2.5V (-2.5V -- +2.5V)
2 == unipolar 5V (0V -- +5V)
*/
static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
/* int i; */
const struct dt2811_board *board = dev->board_ptr;
struct dt2811_private *devpriv;
int ret;
struct comedi_subdevice *s;
ret = comedi_request_region(dev, it->options[0], 0x8);
if (ret)
return ret;
#if 0
outb(0, dev->iobase + DT2811_ADCSR);
udelay(100);
i = inb(dev->iobase + DT2811_ADDATLO);
i = inb(dev->iobase + DT2811_ADDATHI);
#endif
ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
switch (it->options[2]) {
case 0:
devpriv->adc_mux = adc_singleended;
break;
case 1:
devpriv->adc_mux = adc_diff;
break;
case 2:
devpriv->adc_mux = adc_pseudo_diff;
break;
default:
devpriv->adc_mux = adc_singleended;
break;
}
switch (it->options[4]) {
case 0:
devpriv->dac_range[0] = dac_bipolar_5;
break;
case 1:
devpriv->dac_range[0] = dac_bipolar_2_5;
break;
case 2:
devpriv->dac_range[0] = dac_unipolar_5;
break;
default:
devpriv->dac_range[0] = dac_bipolar_5;
break;
}
switch (it->options[5]) {
case 0:
devpriv->dac_range[1] = dac_bipolar_5;
break;
case 1:
devpriv->dac_range[1] = dac_bipolar_2_5;
break;
case 2:
devpriv->dac_range[1] = dac_unipolar_5;
break;
default:
devpriv->dac_range[1] = dac_bipolar_5;
break;
}
s = &dev->subdevices[0];
/* initialize the ADC subdevice */
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = devpriv->adc_mux == adc_diff ? 8 : 16;
s->insn_read = dt2811_ai_insn;
s->maxdata = 0xfff;
switch (it->options[3]) {
case 0:
default:
s->range_table = board->bip_5;
break;
case 1:
s->range_table = board->bip_2_5;
break;
case 2:
s->range_table = board->unip_5;
break;
}
s = &dev->subdevices[1];
/* ao subdevice */
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->maxdata = 0xfff;
s->range_table_list = devpriv->range_type_list;
devpriv->range_type_list[0] = dac_range_types[devpriv->dac_range[0]];
devpriv->range_type_list[1] = dac_range_types[devpriv->dac_range[1]];
s->insn_write = dt2811_ao_insn_write;
s->insn_read = comedi_readback_insn_read;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
s = &dev->subdevices[2];
/* di subdevice */
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 8;
s->insn_bits = dt2811_di_insn_bits;
s->maxdata = 1;
s->range_table = &range_digital;
s = &dev->subdevices[3];
/* do subdevice */
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 8;
s->insn_bits = dt2811_do_insn_bits;
s->maxdata = 1;
s->state = 0;
s->range_table = &range_digital;
return 0;
}
static const struct dt2811_board boardtypes[] = {
{
.name = "dt2811-pgh",
.bip_5 = &range_dt2811_pgh_ai_5_bipolar,
.bip_2_5 = &range_dt2811_pgh_ai_2_5_bipolar,
.unip_5 = &range_dt2811_pgh_ai_5_unipolar,
}, {
.name = "dt2811-pgl",
.bip_5 = &range_dt2811_pgl_ai_5_bipolar,
.bip_2_5 = &range_dt2811_pgl_ai_2_5_bipolar,
.unip_5 = &range_dt2811_pgl_ai_5_unipolar,
},
};
static struct comedi_driver dt2811_driver = {
.driver_name = "dt2811",
.module = THIS_MODULE,
.attach = dt2811_attach,
.detach = comedi_legacy_detach,
.board_name = &boardtypes[0].name,
.num_names = ARRAY_SIZE(boardtypes),
.offset = sizeof(struct dt2811_board),
};
module_comedi_driver(dt2811_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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