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comedi/drivers/rti800.c
Hardware driver for Analog Devices RTI-800/815 board
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 1998 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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
Driver: rti800
Description: Analog Devices RTI-800/815
Author: ds
Status: unknown
Updated: Fri, 05 Sep 2008 14:50:44 +0100
Devices: [Analog Devices] RTI-800 (rti800), RTI-815 (rti815)
Configuration options:
[0] - I/O port base address
[1] - IRQ
[2] - A/D reference
0 = differential
1 = pseudodifferential (common)
2 = single-ended
[3] - A/D range
0 = [-10,10]
1 = [-5,5]
2 = [0,10]
[4] - A/D encoding
0 = two's complement
1 = straight binary
[5] - DAC 0 range
0 = [-10,10]
1 = [0,10]
[6] - DAC 0 encoding
0 = two's complement
1 = straight binary
[7] - DAC 1 range (same as DAC 0)
[8] - DAC 1 encoding (same as DAC 0)
*/
#include <linux/interrupt.h>
#include "../comedidev.h"
#include <linux/ioport.h>
#define RTI800_SIZE 16
#define RTI800_CSR 0
#define RTI800_MUXGAIN 1
#define RTI800_CONVERT 2
#define RTI800_ADCLO 3
#define RTI800_ADCHI 4
#define RTI800_DAC0LO 5
#define RTI800_DAC0HI 6
#define RTI800_DAC1LO 7
#define RTI800_DAC1HI 8
#define RTI800_CLRFLAGS 9
#define RTI800_DI 10
#define RTI800_DO 11
#define RTI800_9513A_DATA 12
#define RTI800_9513A_CNTRL 13
#define RTI800_9513A_STATUS 13
/*
* flags for CSR register
*/
#define RTI800_BUSY 0x80
#define RTI800_DONE 0x40
#define RTI800_OVERRUN 0x20
#define RTI800_TCR 0x10
#define RTI800_DMA_ENAB 0x08
#define RTI800_INTR_TC 0x04
#define RTI800_INTR_EC 0x02
#define RTI800_INTR_OVRN 0x01
#define Am9513_8BITBUS
#define Am9513_output_control(a) outb(a, dev->iobase+RTI800_9513A_CNTRL)
#define Am9513_output_data(a) outb(a, dev->iobase+RTI800_9513A_DATA)
#define Am9513_input_data() inb(dev->iobase+RTI800_9513A_DATA)
#define Am9513_input_status() inb(dev->iobase+RTI800_9513A_STATUS)
#include "am9513.h"
static const struct comedi_lrange range_rti800_ai_10_bipolar = { 4, {
BIP_RANGE
(10),
BIP_RANGE
(1),
BIP_RANGE
(0.1),
BIP_RANGE
(0.02)
}
};
static const struct comedi_lrange range_rti800_ai_5_bipolar = { 4, {
BIP_RANGE
(5),
BIP_RANGE
(0.5),
BIP_RANGE
(0.05),
BIP_RANGE
(0.01)
}
};
static const struct comedi_lrange range_rti800_ai_unipolar = { 4, {
UNI_RANGE
(10),
UNI_RANGE(1),
UNI_RANGE
(0.1),
UNI_RANGE
(0.02)
}
};
struct rti800_board {
const char *name;
int has_ao;
};
static const struct rti800_board boardtypes[] = {
{"rti800", 0},
{"rti815", 1},
};
#define this_board ((const struct rti800_board *)dev->board_ptr)
static int rti800_attach(struct comedi_device *dev,
struct comedi_devconfig *it);
static int rti800_detach(struct comedi_device *dev);
static struct comedi_driver driver_rti800 = {
.driver_name = "rti800",
.module = THIS_MODULE,
.attach = rti800_attach,
.detach = rti800_detach,
.num_names = ARRAY_SIZE(boardtypes),
.board_name = &boardtypes[0].name,
.offset = sizeof(struct rti800_board),
};
static int __init driver_rti800_init_module(void)
{
return comedi_driver_register(&driver_rti800);
}
static void __exit driver_rti800_cleanup_module(void)
{
comedi_driver_unregister(&driver_rti800);
}
module_init(driver_rti800_init_module);
module_exit(driver_rti800_cleanup_module);
static irqreturn_t rti800_interrupt(int irq, void *dev);
struct rti800_private {
enum {
adc_diff, adc_pseudodiff, adc_singleended
} adc_mux;
enum {
adc_bipolar10, adc_bipolar5, adc_unipolar10
} adc_range;
enum {
adc_2comp, adc_straight
} adc_coding;
enum {
dac_bipolar10, dac_unipolar10
} dac0_range, dac1_range;
enum {
dac_2comp, dac_straight
} dac0_coding, dac1_coding;
const struct comedi_lrange *ao_range_type_list[2];
unsigned int ao_readback[2];
int muxgain_bits;
};
#define devpriv ((struct rti800_private *)dev->private)
#define RTI800_TIMEOUT 100
static irqreturn_t rti800_interrupt(int irq, void *dev)
{
return IRQ_HANDLED;
}
/* settling delay times in usec for different gains */
static const int gaindelay[] = { 10, 20, 40, 80 };
static int rti800_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i, t;
int status;
int chan = CR_CHAN(insn->chanspec);
unsigned gain = CR_RANGE(insn->chanspec);
unsigned muxgain_bits;
inb(dev->iobase + RTI800_ADCHI);
outb(0, dev->iobase + RTI800_CLRFLAGS);
muxgain_bits = chan | (gain << 5);
if (muxgain_bits != devpriv->muxgain_bits) {
devpriv->muxgain_bits = muxgain_bits;
outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
/* without a delay here, the RTI_OVERRUN bit
* gets set, and you will have an error. */
if (insn->n > 0) {
BUG_ON(gain >= ARRAY_SIZE(gaindelay));
udelay(gaindelay[gain]);
}
}
for (i = 0; i < insn->n; i++) {
outb(0, dev->iobase + RTI800_CONVERT);
for (t = RTI800_TIMEOUT; t; t--) {
status = inb(dev->iobase + RTI800_CSR);
if (status & RTI800_OVERRUN) {
printk(KERN_WARNING "rti800: a/d overrun\n");
outb(0, dev->iobase + RTI800_CLRFLAGS);
return -EIO;
}
if (status & RTI800_DONE)
break;
udelay(1);
}
if (t == 0) {
printk(KERN_WARNING "rti800: timeout\n");
return -ETIME;
}
data[i] = inb(dev->iobase + RTI800_ADCLO);
data[i] |= (0xf & inb(dev->iobase + RTI800_ADCHI)) << 8;
if (devpriv->adc_coding == adc_2comp)
data[i] ^= 0x800;
}
return i;
}
static int rti800_ao_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int i;
int chan = CR_CHAN(insn->chanspec);
for (i = 0; i < insn->n; i++)
data[i] = devpriv->ao_readback[chan];
return i;
}
static int rti800_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
int chan = CR_CHAN(insn->chanspec);
int d;
int i;
for (i = 0; i < insn->n; i++) {
devpriv->ao_readback[chan] = d = data[i];
if (devpriv->dac0_coding == dac_2comp)
d ^= 0x800;
outb(d & 0xff,
dev->iobase + (chan ? RTI800_DAC1LO : RTI800_DAC0LO));
outb(d >> 8,
dev->iobase + (chan ? RTI800_DAC1HI : RTI800_DAC0HI));
}
return i;
}
static int rti800_di_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
if (insn->n != 2)
return -EINVAL;
data[1] = inb(dev->iobase + RTI800_DI);
return 2;
}
static int rti800_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
if (insn->n != 2)
return -EINVAL;
if (data[0]) {
s->state &= ~data[0];
s->state |= data[0] & data[1];
/* Outputs are inverted... */
outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
}
data[1] = s->state;
return 2;
}
/*
options[0] - I/O port
options[1] - irq
options[2] - a/d mux
0=differential, 1=pseudodiff, 2=single
options[3] - a/d range
0=bipolar10, 1=bipolar5, 2=unipolar10
options[4] - a/d coding
0=2's comp, 1=straight binary
options[5] - dac0 range
0=bipolar10, 1=unipolar10
options[6] - dac0 coding
0=2's comp, 1=straight binary
options[7] - dac1 range
options[8] - dac1 coding
*/
static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
unsigned int irq;
unsigned long iobase;
int ret;
struct comedi_subdevice *s;
iobase = it->options[0];
printk(KERN_INFO "comedi%d: rti800: 0x%04lx\n", dev->minor, iobase);
if (!request_region(iobase, RTI800_SIZE, "rti800")) {
printk(KERN_WARNING "I/O port conflict\n");
return -EIO;
}
dev->iobase = iobase;
#ifdef DEBUG
printk(KERN_DEBUG "fingerprint=%x,%x,%x,%x,%x ",
inb(dev->iobase + 0),
inb(dev->iobase + 1),
inb(dev->iobase + 2),
inb(dev->iobase + 3), inb(dev->iobase + 4));
#endif
outb(0, dev->iobase + RTI800_CSR);
inb(dev->iobase + RTI800_ADCHI);
outb(0, dev->iobase + RTI800_CLRFLAGS);
irq = it->options[1];
if (irq) {
printk(KERN_INFO "( irq = %u )\n", irq);
ret = request_irq(irq, rti800_interrupt, 0, "rti800", dev);
if (ret < 0) {
printk(KERN_WARNING " Failed to allocate IRQ\n");
return ret;
}
dev->irq = irq;
} else {
printk(KERN_INFO "( no irq )\n");
}
dev->board_name = this_board->name;
ret = alloc_subdevices(dev, 4);
if (ret < 0)
return ret;
ret = alloc_private(dev, sizeof(struct rti800_private));
if (ret < 0)
return ret;
devpriv->adc_mux = it->options[2];
devpriv->adc_range = it->options[3];
devpriv->adc_coding = it->options[4];
devpriv->dac0_range = it->options[5];
devpriv->dac0_coding = it->options[6];
devpriv->dac1_range = it->options[7];
devpriv->dac1_coding = it->options[8];
devpriv->muxgain_bits = -1;
s = dev->subdevices + 0;
/* ai subdevice */
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND;
s->n_chan = (devpriv->adc_mux ? 16 : 8);
s->insn_read = rti800_ai_insn_read;
s->maxdata = 0xfff;
switch (devpriv->adc_range) {
case adc_bipolar10:
s->range_table = &range_rti800_ai_10_bipolar;
break;
case adc_bipolar5:
s->range_table = &range_rti800_ai_5_bipolar;
break;
case adc_unipolar10:
s->range_table = &range_rti800_ai_unipolar;
break;
}
s++;
if (this_board->has_ao) {
/* ao subdevice (only on rti815) */
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 2;
s->insn_read = rti800_ao_insn_read;
s->insn_write = rti800_ao_insn_write;
s->maxdata = 0xfff;
s->range_table_list = devpriv->ao_range_type_list;
switch (devpriv->dac0_range) {
case dac_bipolar10:
devpriv->ao_range_type_list[0] = &range_bipolar10;
break;
case dac_unipolar10:
devpriv->ao_range_type_list[0] = &range_unipolar10;
break;
}
switch (devpriv->dac1_range) {
case dac_bipolar10:
devpriv->ao_range_type_list[1] = &range_bipolar10;
break;
case dac_unipolar10:
devpriv->ao_range_type_list[1] = &range_unipolar10;
break;
}
} else {
s->type = COMEDI_SUBD_UNUSED;
}
s++;
/* di */
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 8;
s->insn_bits = rti800_di_insn_bits;
s->maxdata = 1;
s->range_table = &range_digital;
s++;
/* do */
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = 8;
s->insn_bits = rti800_do_insn_bits;
s->maxdata = 1;
s->range_table = &range_digital;
/* don't yet know how to deal with counter/timers */
#if 0
s++;
/* do */
s->type = COMEDI_SUBD_TIMER;
#endif
return 0;
}
static int rti800_detach(struct comedi_device *dev)
{
printk(KERN_INFO "comedi%d: rti800: remove\n", dev->minor);
if (dev->iobase)
release_region(dev->iobase, RTI800_SIZE);
if (dev->irq)
free_irq(dev->irq, dev);
return 0;
}
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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