comedi/comedi/drivers/aio_iiro_16.c

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/*

    comedi/drivers/aio_iiro_16.c

    Driver for Acces I/O Products PC-104 AIO-IIRO-16 Digital 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_iiro_16
Description: Acces I/O Products PC-104 IIRO16 Relay And Isolated Input Board
Author: Zachary Ware <zach.ware@cctechnol.com>
Devices:
 [Acces I/O] PC-104 AIO12-8
Status: experimental

Configuration Options:
  [0] - I/O port base address

*/

#include <linux/comedidev.h>
#include <linux/ioport.h>

#define AIO_IIRO_16_SIZE        0x08
#define AIO_IIRO_16_RELAY_0_7   0x00
#define AIO_IIRO_16_INPUT_0_7   0x01
#define AIO_IIRO_16_IRQ         0x02
#define AIO_IIRO_16_RELAY_8_15  0x04
#define AIO_IIRO_16_INPUT_8_15  0x05

typedef struct aio_iiro_16_board_struct {
        const char *name;
        int do_;
        int di;
} aio_iiro_16_board;

static const aio_iiro_16_board aio_iiro_16_boards[] = {
        {
              name:     "aio_iiro_16",
              di:       16,
      do_:      16},
};

#define thisboard       ((const aio_iiro_16_board *) dev->board_ptr)

typedef struct {
        int data;
        struct pci_dev *pci_dev;
        lsampl_t ao_readback[2];
} aio_iiro_16_private;

#define devpriv ((aio_iiro_16_private *) dev->private)

static int aio_iiro_16_attach(comedi_device * dev, comedi_devconfig * it);

static int aio_iiro_16_detach(comedi_device * dev);

static comedi_driver driver_aio_iiro_16 = {
      driver_name:"aio_iiro_16",
      module:THIS_MODULE,
      attach:aio_iiro_16_attach,
      detach:aio_iiro_16_detach,
      board_name:&aio_iiro_16_boards[0].name,
      offset:sizeof(aio_iiro_16_board),
      num_names:sizeof(aio_iiro_16_boards) / sizeof(aio_iiro_16_board),
};

static int aio_iiro_16_dio_insn_bits_read(comedi_device * dev,
        comedi_subdevice * s, comedi_insn * insn, lsampl_t * data);

static int aio_iiro_16_dio_insn_bits_write(comedi_device * dev,
        comedi_subdevice * s, comedi_insn * insn, lsampl_t * data);

static int aio_iiro_16_attach(comedi_device * dev, comedi_devconfig * it)
{
        int iobase;
        comedi_subdevice *s;

        printk("comedi%d: aio_iiro_16: ", dev->minor);

        dev->board_name = thisboard->name;

        iobase = it->options[0];

        if (!request_region(iobase, AIO_IIRO_16_SIZE, dev->board_name)) {
                printk("I/O port conflict");
                return -EIO;
        }

        dev->iobase = iobase;

        if (alloc_private(dev, sizeof(aio_iiro_16_private)) < 0)
                return -ENOMEM;

        if (alloc_subdevices(dev, 2) < 0)
                return -ENOMEM;

        s = dev->subdevices + 0;
        s->type = COMEDI_SUBD_DIO;
        s->subdev_flags = SDF_WRITABLE;
        s->n_chan = 16;
        s->maxdata = 1;
        s->range_table = &range_digital;
        s->insn_bits = aio_iiro_16_dio_insn_bits_write;

        s = dev->subdevices + 1;
        s->type = COMEDI_SUBD_DIO;
        s->subdev_flags = SDF_READABLE;
        s->n_chan = 16;
        s->maxdata = 1;
        s->range_table = &range_digital;
        s->insn_bits = aio_iiro_16_dio_insn_bits_read;

        printk("attached\n");

        return 1;
}

static int aio_iiro_16_detach(comedi_device * dev)
{
        printk("comedi%d: aio_iiro_16: remove\n", dev->minor);

        if (dev->iobase)
                release_region(dev->iobase, AIO_IIRO_16_SIZE);

        return 0;
}

static int aio_iiro_16_dio_insn_bits_write(comedi_device * dev,
        comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
{
        if (insn->n != 2)
                return -EINVAL;

        if (data[0]) {
                s->state &= ~data[0];
                s->state |= data[0] & data[1];
                outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
                outb((s->state >> 8) & 0xff,
                        dev->iobase + AIO_IIRO_16_RELAY_8_15);
        }

        data[1] = s->state;

        return 2;
}

static int aio_iiro_16_dio_insn_bits_read(comedi_device * dev,
        comedi_subdevice * s, comedi_insn * insn, lsampl_t * data)
{
        if (insn->n != 2)
                return -EINVAL;

        data[1] = 0;
        data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
        data[1] |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;

        return 2;
}

COMEDI_INITCLEANUP(driver_aio_iiro_16);