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gfiber / kernel / skids / master / . / drivers / staging / comedi / drivers / das800.c
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/*
comedi/drivers/das800.c
Driver for Keitley das800 series boards and compatibles
Copyright (C) 2000 Frank Mori Hess <fmhess@users.sourceforge.net>
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.
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: das800
Description: Keithley Metrabyte DAS800 (& compatibles)
Author: Frank Mori Hess <fmhess@users.sourceforge.net>
Devices: [Keithley Metrabyte] DAS-800 (das-800), DAS-801 (das-801),
DAS-802 (das-802),
[Measurement Computing] CIO-DAS800 (cio-das800),
CIO-DAS801 (cio-das801), CIO-DAS802 (cio-das802),
CIO-DAS802/16 (cio-das802/16)
Status: works, cio-das802/16 untested - email me if you have tested it
Configuration options:
[0] - I/O port base address
[1] - IRQ (optional, required for timed or externally triggered conversions)
Notes:
IRQ can be omitted, although the cmd interface will not work without it.
All entries in the channel/gain list must use the same gain and be
consecutive channels counting upwards in channel number (these are
hardware limitations.)
I've never tested the gain setting stuff since I only have a
DAS-800 board with fixed gain.
The cio-das802/16 does not have a fifo-empty status bit! Therefore
only fifo-half-full transfers are possible with this card.
*/
/*
cmd triggers supported:
start_src: TRIG_NOW | TRIG_EXT
scan_begin_src: TRIG_FOLLOW
scan_end_src: TRIG_COUNT
convert_src: TRIG_TIMER | TRIG_EXT
stop_src: TRIG_NONE | TRIG_COUNT
*/
#include <linux/interrupt.h>
#include "../comedidev.h"
#include <linux/ioport.h>
#include <linux/delay.h>
#include "8253.h"
#include "comedi_fc.h"
#define DAS800_SIZE 8
#define TIMER_BASE 1000
#define N_CHAN_AI 8 /* number of analog input channels */
/* Registers for the das800 */
#define DAS800_LSB 0
#define FIFO_EMPTY 0x1
#define FIFO_OVF 0x2
#define DAS800_MSB 1
#define DAS800_CONTROL1 2
#define CONTROL1_INTE 0x8
#define DAS800_CONV_CONTROL 2
#define ITE 0x1
#define CASC 0x2
#define DTEN 0x4
#define IEOC 0x8
#define EACS 0x10
#define CONV_HCEN 0x80
#define DAS800_SCAN_LIMITS 2
#define DAS800_STATUS 2
#define IRQ 0x8
#define BUSY 0x80
#define DAS800_GAIN 3
#define CIO_FFOV 0x8 /* fifo overflow for cio-das802/16 */
#define CIO_ENHF 0x90 /* interrupt fifo half full for cio-das802/16 */
#define CONTROL1 0x80
#define CONV_CONTROL 0xa0
#define SCAN_LIMITS 0xc0
#define ID 0xe0
#define DAS800_8254 4
#define DAS800_STATUS2 7
#define STATUS2_HCEN 0x80
#define STATUS2_INTE 0X20
#define DAS800_ID 7
struct das800_board {
const char *name;
int ai_speed;
const struct comedi_lrange *ai_range;
int resolution;
};
/* analog input ranges */
static const struct comedi_lrange range_das800_ai = {
1,
{
RANGE(-5, 5),
}
};
static const struct comedi_lrange range_das801_ai = {
9,
{
RANGE(-5, 5),
RANGE(-10, 10),
RANGE(0, 10),
RANGE(-0.5, 0.5),
RANGE(0, 1),
RANGE(-0.05, 0.05),
RANGE(0, 0.1),
RANGE(-0.01, 0.01),
RANGE(0, 0.02),
}
};
static const struct comedi_lrange range_cio_das801_ai = {
9,
{
RANGE(-5, 5),
RANGE(-10, 10),
RANGE(0, 10),
RANGE(-0.5, 0.5),
RANGE(0, 1),
RANGE(-0.05, 0.05),
RANGE(0, 0.1),
RANGE(-0.005, 0.005),
RANGE(0, 0.01),
}
};
static const struct comedi_lrange range_das802_ai = {
9,
{
RANGE(-5, 5),
RANGE(-10, 10),
RANGE(0, 10),
RANGE(-2.5, 2.5),
RANGE(0, 5),
RANGE(-1.25, 1.25),
RANGE(0, 2.5),
RANGE(-0.625, 0.625),
RANGE(0, 1.25),
}
};
static const struct comedi_lrange range_das80216_ai = {
8,
{
RANGE(-10, 10),
RANGE(0, 10),
RANGE(-5, 5),
RANGE(0, 5),
RANGE(-2.5, 2.5),
RANGE(0, 2.5),
RANGE(-1.25, 1.25),
RANGE(0, 1.25),
}
};
enum { das800, ciodas800, das801, ciodas801, das802, ciodas802, ciodas80216 };
static const struct das800_board das800_boards[] = {
{
.name = "das-800",
.ai_speed = 25000,
.ai_range = &range_das800_ai,
.resolution = 12,
},
{
.name = "cio-das800",
.ai_speed = 20000,
.ai_range = &range_das800_ai,
.resolution = 12,
},
{
.name = "das-801",
.ai_speed = 25000,
.ai_range = &range_das801_ai,
.resolution = 12,
},
{
.name = "cio-das801",
.ai_speed = 20000,
.ai_range = &range_cio_das801_ai,
.resolution = 12,
},
{
.name = "das-802",
.ai_speed = 25000,
.ai_range = &range_das802_ai,
.resolution = 12,
},
{
.name = "cio-das802",
.ai_speed = 20000,
.ai_range = &range_das802_ai,
.resolution = 12,
},
{
.name = "cio-das802/16",
.ai_speed = 10000,
.ai_range = &range_das80216_ai,
.resolution = 16,
},
};
/*
* Useful for shorthand access to the particular board structure
*/
#define thisboard ((const struct das800_board *)dev->board_ptr)
struct das800_private {
volatile unsigned int count; /* number of data points left to be taken */
volatile int forever; /* flag indicating whether we should take data forever */
unsigned int divisor1; /* value to load into board's counter 1 for timed conversions */
unsigned int divisor2; /* value to load into board's counter 2 for timed conversions */
volatile int do_bits; /* digital output bits */
};
#define devpriv ((struct das800_private *)dev->private)
static int das800_attach(struct comedi_device *dev,
struct comedi_devconfig *it);
static int das800_detach(struct comedi_device *dev);
static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
static struct comedi_driver driver_das800 = {
.driver_name = "das800",
.module = THIS_MODULE,
.attach = das800_attach,
.detach = das800_detach,
.num_names = ARRAY_SIZE(das800_boards),
.board_name = &das800_boards[0].name,
.offset = sizeof(struct das800_board),
};
static irqreturn_t das800_interrupt(int irq, void *d);
static void enable_das800(struct comedi_device *dev);
static void disable_das800(struct comedi_device *dev);
static int das800_ai_do_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd);
static int das800_ai_do_cmd(struct comedi_device *dev,
struct comedi_subdevice *s);
static int das800_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data);
static int das800_di_rbits(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data);
static int das800_do_wbits(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data);
static int das800_probe(struct comedi_device *dev);
static int das800_set_frequency(struct comedi_device *dev);
/* checks and probes das-800 series board type */
static int das800_probe(struct comedi_device *dev)
{
int id_bits;
unsigned long irq_flags;
int board;
/* 'comedi spin lock irqsave' disables even rt interrupts, we use them to protect indirect addressing */
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(ID, dev->iobase + DAS800_GAIN); /* select base address + 7 to be ID register */
id_bits = inb(dev->iobase + DAS800_ID) & 0x3; /* get id bits */
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
board = thisboard - das800_boards;
switch (id_bits) {
case 0x0:
if (board == das800) {
printk(" Board model: DAS-800\n");
return board;
}
if (board == ciodas800) {
printk(" Board model: CIO-DAS800\n");
return board;
}
printk(" Board model (probed): DAS-800\n");
return das800;
break;
case 0x2:
if (board == das801) {
printk(" Board model: DAS-801\n");
return board;
}
if (board == ciodas801) {
printk(" Board model: CIO-DAS801\n");
return board;
}
printk(" Board model (probed): DAS-801\n");
return das801;
break;
case 0x3:
if (board == das802) {
printk(" Board model: DAS-802\n");
return board;
}
if (board == ciodas802) {
printk(" Board model: CIO-DAS802\n");
return board;
}
if (board == ciodas80216) {
printk(" Board model: CIO-DAS802/16\n");
return board;
}
printk(" Board model (probed): DAS-802\n");
return das802;
break;
default:
printk(" Board model: probe returned 0x%x (unknown)\n",
id_bits);
return board;
break;
}
return -1;
}
/*
* A convenient macro that defines init_module() and cleanup_module(),
* as necessary.
*/
COMEDI_INITCLEANUP(driver_das800);
/* interrupt service routine */
static irqreturn_t das800_interrupt(int irq, void *d)
{
short i; /* loop index */
short dataPoint = 0;
struct comedi_device *dev = d;
struct comedi_subdevice *s = dev->read_subdev; /* analog input subdevice */
struct comedi_async *async;
int status;
unsigned long irq_flags;
static const int max_loops = 128; /* half-fifo size for cio-das802/16 */
/* flags */
int fifo_empty = 0;
int fifo_overflow = 0;
status = inb(dev->iobase + DAS800_STATUS);
/* if interrupt was not generated by board or driver not attached, quit */
if (!(status & IRQ))
return IRQ_NONE;
if (!(dev->attached))
return IRQ_HANDLED;
/* wait until here to initialize async, since we will get null dereference
* if interrupt occurs before driver is fully attached!
*/
async = s->async;
/* if hardware conversions are not enabled, then quit */
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select base address + 7 to be STATUS2 register */
status = inb(dev->iobase + DAS800_STATUS2) & STATUS2_HCEN;
/* don't release spinlock yet since we want to make sure noone else disables hardware conversions */
if (status == 0) {
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
return IRQ_HANDLED;
}
/* loop while card's fifo is not empty (and limit to half fifo for cio-das802/16) */
for (i = 0; i < max_loops; i++) {
/* read 16 bits from dev->iobase and dev->iobase + 1 */
dataPoint = inb(dev->iobase + DAS800_LSB);
dataPoint += inb(dev->iobase + DAS800_MSB) << 8;
if (thisboard->resolution == 12) {
fifo_empty = dataPoint & FIFO_EMPTY;
fifo_overflow = dataPoint & FIFO_OVF;
if (fifo_overflow)
break;
} else {
fifo_empty = 0; /* cio-das802/16 has no fifo empty status bit */
}
if (fifo_empty)
break;
/* strip off extraneous bits for 12 bit cards */
if (thisboard->resolution == 12)
dataPoint = (dataPoint >> 4) & 0xfff;
/* if there are more data points to collect */
if (devpriv->count > 0 || devpriv->forever == 1) {
/* write data point to buffer */
cfc_write_to_buffer(s, dataPoint);
if (devpriv->count > 0)
devpriv->count--;
}
}
async->events |= COMEDI_CB_BLOCK;
/* check for fifo overflow */
if (thisboard->resolution == 12) {
fifo_overflow = dataPoint & FIFO_OVF;
/* else cio-das802/16 */
} else {
fifo_overflow = inb(dev->iobase + DAS800_GAIN) & CIO_FFOV;
}
if (fifo_overflow) {
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
comedi_error(dev, "DAS800 FIFO overflow");
das800_cancel(dev, dev->subdevices + 0);
async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
comedi_event(dev, s);
async->events = 0;
return IRQ_HANDLED;
}
if (devpriv->count > 0 || devpriv->forever == 1) {
/* Re-enable card's interrupt.
* We already have spinlock, so indirect addressing is safe */
outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
outb(CONTROL1_INTE | devpriv->do_bits,
dev->iobase + DAS800_CONTROL1);
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
/* otherwise, stop taking data */
} else {
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
disable_das800(dev); /* diable hardware triggered conversions */
async->events |= COMEDI_CB_EOA;
}
comedi_event(dev, s);
async->events = 0;
return IRQ_HANDLED;
}
static int das800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct comedi_subdevice *s;
unsigned long iobase = it->options[0];
unsigned int irq = it->options[1];
unsigned long irq_flags;
int board;
printk("comedi%d: das800: io 0x%lx", dev->minor, iobase);
if (irq)
printk(", irq %u", irq);
printk("\n");
/* allocate and initialize dev->private */
if (alloc_private(dev, sizeof(struct das800_private)) < 0)
return -ENOMEM;
if (iobase == 0) {
printk("io base address required for das800\n");
return -EINVAL;
}
/* check if io addresses are available */
if (!request_region(iobase, DAS800_SIZE, "das800")) {
printk("I/O port conflict\n");
return -EIO;
}
dev->iobase = iobase;
board = das800_probe(dev);
if (board < 0) {
printk("unable to determine board type\n");
return -ENODEV;
}
dev->board_ptr = das800_boards + board;
/* grab our IRQ */
if (irq == 1 || irq > 7) {
printk("irq out of range\n");
return -EINVAL;
}
if (irq) {
if (request_irq(irq, das800_interrupt, 0, "das800", dev)) {
printk("unable to allocate irq %u\n", irq);
return -EINVAL;
}
}
dev->irq = irq;
dev->board_name = thisboard->name;
if (alloc_subdevices(dev, 3) < 0)
return -ENOMEM;
/* analog input subdevice */
s = dev->subdevices + 0;
dev->read_subdev = s;
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
s->n_chan = 8;
s->len_chanlist = 8;
s->maxdata = (1 << thisboard->resolution) - 1;
s->range_table = thisboard->ai_range;
s->do_cmd = das800_ai_do_cmd;
s->do_cmdtest = das800_ai_do_cmdtest;
s->insn_read = das800_ai_rinsn;
s->cancel = das800_cancel;
/* di */
s = dev->subdevices + 1;
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 3;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = das800_di_rbits;
/* do */
s = dev->subdevices + 2;
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
s->n_chan = 4;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_bits = das800_do_wbits;
disable_das800(dev);
/* initialize digital out channels */
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
outb(CONTROL1_INTE | devpriv->do_bits, dev->iobase + DAS800_CONTROL1);
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
return 0;
};
static int das800_detach(struct comedi_device *dev)
{
printk("comedi%d: das800: remove\n", dev->minor);
/* only free stuff if it has been allocated by _attach */
if (dev->iobase)
release_region(dev->iobase, DAS800_SIZE);
if (dev->irq)
free_irq(dev->irq, dev);
return 0;
};
static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
devpriv->forever = 0;
devpriv->count = 0;
disable_das800(dev);
return 0;
}
/* enable_das800 makes the card start taking hardware triggered conversions */
static void enable_das800(struct comedi_device *dev)
{
unsigned long irq_flags;
spin_lock_irqsave(&dev->spinlock, irq_flags);
/* enable fifo-half full interrupts for cio-das802/16 */
if (thisboard->resolution == 16)
outb(CIO_ENHF, dev->iobase + DAS800_GAIN);
outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
outb(CONV_HCEN, dev->iobase + DAS800_CONV_CONTROL); /* enable hardware triggering */
outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
outb(CONTROL1_INTE | devpriv->do_bits, dev->iobase + DAS800_CONTROL1); /* enable card's interrupt */
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
}
/* disable_das800 stops hardware triggered conversions */
static void disable_das800(struct comedi_device *dev)
{
unsigned long irq_flags;
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
outb(0x0, dev->iobase + DAS800_CONV_CONTROL); /* disable hardware triggering of conversions */
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
}
static int das800_ai_do_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd)
{
int err = 0;
int tmp;
int gain, startChan;
int i;
/* step 1: make sure trigger sources are trivially valid */
tmp = cmd->start_src;
cmd->start_src &= TRIG_NOW | TRIG_EXT;
if (!cmd->start_src || tmp != cmd->start_src)
err++;
tmp = cmd->scan_begin_src;
cmd->scan_begin_src &= TRIG_FOLLOW;
if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
err++;
tmp = cmd->convert_src;
cmd->convert_src &= TRIG_TIMER | TRIG_EXT;
if (!cmd->convert_src || tmp != cmd->convert_src)
err++;
tmp = cmd->scan_end_src;
cmd->scan_end_src &= TRIG_COUNT;
if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
err++;
tmp = cmd->stop_src;
cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
if (!cmd->stop_src || tmp != cmd->stop_src)
err++;
if (err)
return 1;
/* step 2: make sure trigger sources are unique and mutually compatible */
if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT)
err++;
if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT)
err++;
if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
err++;
if (err)
return 2;
/* step 3: make sure arguments are trivially compatible */
if (cmd->start_arg != 0) {
cmd->start_arg = 0;
err++;
}
if (cmd->convert_src == TRIG_TIMER) {
if (cmd->convert_arg < thisboard->ai_speed) {
cmd->convert_arg = thisboard->ai_speed;
err++;
}
}
if (!cmd->chanlist_len) {
cmd->chanlist_len = 1;
err++;
}
if (cmd->scan_end_arg != cmd->chanlist_len) {
cmd->scan_end_arg = cmd->chanlist_len;
err++;
}
if (cmd->stop_src == TRIG_COUNT) {
if (!cmd->stop_arg) {
cmd->stop_arg = 1;
err++;
}
} else { /* TRIG_NONE */
if (cmd->stop_arg != 0) {
cmd->stop_arg = 0;
err++;
}
}
if (err)
return 3;
/* step 4: fix up any arguments */
if (cmd->convert_src == TRIG_TIMER) {
tmp = cmd->convert_arg;
/* calculate counter values that give desired timing */
i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1),
&(devpriv->divisor2),
&(cmd->convert_arg),
cmd->flags & TRIG_ROUND_MASK);
if (tmp != cmd->convert_arg)
err++;
}
if (err)
return 4;
/* check channel/gain list against card's limitations */
if (cmd->chanlist) {
gain = CR_RANGE(cmd->chanlist[0]);
startChan = CR_CHAN(cmd->chanlist[0]);
for (i = 1; i < cmd->chanlist_len; i++) {
if (CR_CHAN(cmd->chanlist[i]) !=
(startChan + i) % N_CHAN_AI) {
comedi_error(dev,
"entries in chanlist must be consecutive channels, counting upwards\n");
err++;
}
if (CR_RANGE(cmd->chanlist[i]) != gain) {
comedi_error(dev,
"entries in chanlist must all have the same gain\n");
err++;
}
}
}
if (err)
return 5;
return 0;
}
static int das800_ai_do_cmd(struct comedi_device *dev,
struct comedi_subdevice *s)
{
int startChan, endChan, scan, gain;
int conv_bits;
unsigned long irq_flags;
struct comedi_async *async = s->async;
if (!dev->irq) {
comedi_error(dev,
"no irq assigned for das-800, cannot do hardware conversions");
return -1;
}
disable_das800(dev);
/* set channel scan limits */
startChan = CR_CHAN(async->cmd.chanlist[0]);
endChan = (startChan + async->cmd.chanlist_len - 1) % 8;
scan = (endChan << 3) | startChan;
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(SCAN_LIMITS, dev->iobase + DAS800_GAIN); /* select base address + 2 to be scan limits register */
outb(scan, dev->iobase + DAS800_SCAN_LIMITS); /* set scan limits */
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
/* set gain */
gain = CR_RANGE(async->cmd.chanlist[0]);
if (thisboard->resolution == 12 && gain > 0)
gain += 0x7;
gain &= 0xf;
outb(gain, dev->iobase + DAS800_GAIN);
switch (async->cmd.stop_src) {
case TRIG_COUNT:
devpriv->count = async->cmd.stop_arg * async->cmd.chanlist_len;
devpriv->forever = 0;
break;
case TRIG_NONE:
devpriv->forever = 1;
devpriv->count = 0;
break;
default:
break;
}
/* enable auto channel scan, send interrupts on end of conversion
* and set clock source to internal or external
*/
conv_bits = 0;
conv_bits |= EACS | IEOC;
if (async->cmd.start_src == TRIG_EXT)
conv_bits |= DTEN;
switch (async->cmd.convert_src) {
case TRIG_TIMER:
conv_bits |= CASC | ITE;
/* set conversion frequency */
i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1),
&(devpriv->divisor2),
&(async->cmd.convert_arg),
async->cmd.
flags & TRIG_ROUND_MASK);
if (das800_set_frequency(dev) < 0) {
comedi_error(dev, "Error setting up counters");
return -1;
}
break;
case TRIG_EXT:
break;
default:
break;
}
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
outb(conv_bits, dev->iobase + DAS800_CONV_CONTROL);
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
async->events = 0;
enable_das800(dev);
return 0;
}
static int das800_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data)
{
int i, n;
int chan;
int range;
int lsb, msb;
int timeout = 1000;
unsigned long irq_flags;
disable_das800(dev); /* disable hardware conversions (enables software conversions) */
/* set multiplexer */
chan = CR_CHAN(insn->chanspec);
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
outb(chan | devpriv->do_bits, dev->iobase + DAS800_CONTROL1);
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
/* set gain / range */
range = CR_RANGE(insn->chanspec);
if (thisboard->resolution == 12 && range)
range += 0x7;
range &= 0xf;
outb(range, dev->iobase + DAS800_GAIN);
udelay(5);
for (n = 0; n < insn->n; n++) {
/* trigger conversion */
outb_p(0, dev->iobase + DAS800_MSB);
for (i = 0; i < timeout; i++) {
if (!(inb(dev->iobase + DAS800_STATUS) & BUSY))
break;
}
if (i == timeout) {
comedi_error(dev, "timeout");
return -ETIME;
}
lsb = inb(dev->iobase + DAS800_LSB);
msb = inb(dev->iobase + DAS800_MSB);
if (thisboard->resolution == 12) {
data[n] = (lsb >> 4) & 0xff;
data[n] |= (msb << 4);
} else {
data[n] = (msb << 8) | lsb;
}
}
return n;
}
static int das800_di_rbits(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data)
{
unsigned int bits;
bits = inb(dev->iobase + DAS800_STATUS) >> 4;
bits &= 0x7;
data[1] = bits;
data[0] = 0;
return 2;
}
static int das800_do_wbits(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data)
{
int wbits;
unsigned long irq_flags;
/* only set bits that have been masked */
data[0] &= 0xf;
wbits = devpriv->do_bits >> 4;
wbits &= ~data[0];
wbits |= data[0] & data[1];
devpriv->do_bits = wbits << 4;
spin_lock_irqsave(&dev->spinlock, irq_flags);
outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
outb(devpriv->do_bits | CONTROL1_INTE, dev->iobase + DAS800_CONTROL1);
spin_unlock_irqrestore(&dev->spinlock, irq_flags);
data[1] = wbits;
return 2;
}
/* loads counters with divisor1, divisor2 from private structure */
static int das800_set_frequency(struct comedi_device *dev)
{
int err = 0;
if (i8254_load(dev->iobase + DAS800_8254, 0, 1, devpriv->divisor1, 2))
err++;
if (i8254_load(dev->iobase + DAS800_8254, 0, 2, devpriv->divisor2, 2))
err++;
if (err)
return -1;
return 0;
}