--- /dev/null
+/*
+
+ comedi/drivers/aio_aio12_8.c
+
+ Driver for Acces I/O Products PC-104 AIO12-8 Analog I/O Board
+ Copyright (C) 2006 C&C Technologies, Inc.
+
+ 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: aio_aio12_8
+Description: Acces I/O Products PC-104 AIO12-8 Analog I/O Board
+Author: Pablo Mejia <pablo.mejia@cctechnol.com>
+Devices:
+ [Acces I/O] PC-104 AIO12-8
+Status: experimental
+
+Configuration Options:
+ [0] - I/O port base address
+
+Notes:
+
+ Only synchronous operations are supported.
+
+*/
+
+#include "../comedidev.h"
+#include <linux/ioport.h>
+#include "8255.h"
+
+#define AIO12_8_STATUS 0x00
+#define AIO12_8_INTERRUPT 0x01
+#define AIO12_8_ADC 0x02
+#define AIO12_8_DAC_0 0x04
+#define AIO12_8_DAC_1 0x06
+#define AIO12_8_DAC_2 0x08
+#define AIO12_8_DAC_3 0x0A
+#define AIO12_8_COUNTER_0 0x0C
+#define AIO12_8_COUNTER_1 0x0D
+#define AIO12_8_COUNTER_2 0x0E
+#define AIO12_8_COUNTER_CONTROL 0x0F
+#define AIO12_8_DIO_0 0x10
+#define AIO12_8_DIO_1 0x11
+#define AIO12_8_DIO_2 0x12
+#define AIO12_8_DIO_STATUS 0x13
+#define AIO12_8_DIO_CONTROL 0x14
+#define AIO12_8_ADC_TRIGGER_CONTROL 0x15
+#define AIO12_8_TRIGGER 0x16
+#define AIO12_8_POWER 0x17
+
+#define STATUS_ADC_EOC 0x80
+
+#define ADC_MODE_NORMAL 0x00
+#define ADC_MODE_INTERNAL_CLOCK 0x40
+#define ADC_MODE_STANDBY 0x80
+#define ADC_MODE_POWERDOWN 0xC0
+
+#define DAC_ENABLE 0x18
+
+typedef struct {
+ const char *name;
+} board_type;
+
+static const board_type board_types[] = {
+ {
+ name: "aio_aio12_8"},
+};
+
+#define thisboard ((const board_type *) dev->board_ptr)
+
+typedef struct {
+ lsampl_t ao_readback[4];
+} aio12_8_private;
+
+#define devpriv ((aio12_8_private *) dev->private)
+
+static int aio_aio12_8_ai_read(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int n;
+ unsigned char control =
+ ADC_MODE_NORMAL |
+ (CR_RANGE(insn->chanspec) << 3) | CR_CHAN(insn->chanspec);
+
+ //read status to clear EOC latch
+ inb(dev->iobase + AIO12_8_STATUS);
+
+ for (n = 0; n < insn->n; n++) {
+ int timeout = 5;
+
+ // Setup and start conversion
+ outb(control, dev->iobase + AIO12_8_ADC);
+
+ // Wait for conversion to complete
+ while (timeout &&
+ !(inb(dev->iobase + AIO12_8_STATUS) & STATUS_ADC_EOC)) {
+ timeout--;
+ printk("timeout %d\n", timeout);
+ comedi_udelay(1);
+ }
+ if (timeout == 0) {
+ comedi_error(dev, "ADC timeout");
+ return -EIO;
+ }
+
+ data[n] = inw(dev->iobase + AIO12_8_ADC) & 0x0FFF;
+ }
+ return n;
+}
+
+static int aio_aio12_8_ao_read(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i;
+ int val = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
+
+ for (i = 0; i < insn->n; i++)
+ data[i] = val;
+ return insn->n;
+}
+
+static int aio_aio12_8_ao_write(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i;
+ int chan = CR_CHAN(insn->chanspec);
+ unsigned long port = dev->iobase + AIO12_8_DAC_0 + (2 * chan);
+
+ //enable DACs
+ outb(0x01, dev->iobase + DAC_ENABLE);
+
+ for (i = 0; i < insn->n; i++) {
+ outb(data[i] & 0xFF, port); // LSB
+ outb((data[i] >> 8) & 0x0F, port + 1); // MSB
+ devpriv->ao_readback[chan] = data[i];
+ }
+ return insn->n;
+}
+
+static const comedi_lrange range_aio_aio12_8 = {
+ 4,
+ {
+ UNI_RANGE(5),
+ BIP_RANGE(5),
+ UNI_RANGE(10),
+ BIP_RANGE(10),
+ }
+};
+
+static int aio_aio12_8_attach(comedi_device * dev, comedi_devconfig * it)
+{
+ int iobase;
+ comedi_subdevice *s;
+
+ iobase = it->options[0];
+ if (!request_region(iobase, 24, "aio_aio12_8")) {
+ printk("I/O port conflict");
+ return -EIO;
+ }
+
+ dev->board_name = thisboard->name;
+
+ dev->iobase = iobase;
+
+ if (alloc_private(dev, sizeof(aio12_8_private)) < 0)
+ return -ENOMEM;
+
+ if (alloc_subdevices(dev, 3) < 0)
+ return -ENOMEM;
+
+ s = &dev->subdevices[0];
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
+ s->n_chan = 8;
+ s->maxdata = (1 << 12) - 1;
+ s->range_table = &range_aio_aio12_8;
+ s->insn_read = aio_aio12_8_ai_read;
+
+ s = &dev->subdevices[1];
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF;
+ s->n_chan = 4;
+ s->maxdata = (1 << 12) - 1;
+ s->range_table = &range_aio_aio12_8;
+ s->insn_read = aio_aio12_8_ao_read;
+ s->insn_write = aio_aio12_8_ao_write;
+
+ s = &dev->subdevices[2];
+ subdev_8255_init(dev, s, NULL, dev->iobase + AIO12_8_DIO_0);
+
+ return 0;
+}
+
+static int aio_aio12_8_detach(comedi_device * dev)
+{
+ subdev_8255_cleanup(dev, &dev->subdevices[2]);
+ if (dev->iobase)
+ release_region(dev->iobase, 24);
+ return 0;
+}
+
+static comedi_driver driver_aio_aio12_8 = {
+ driver_name:"aio_aio12_8",
+ module:THIS_MODULE,
+ attach:aio_aio12_8_attach,
+ detach:aio_aio12_8_detach,
+ board_name:&board_types[0].name,
+ num_names:1,
+ offset:sizeof(board_type),
+};
+
+COMEDI_INITCLEANUP(driver_aio_aio12_8);
git.openpandora.org / pandora-kernel.git / commitdiff