pcm3730.c

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/*
 * comedi/drivers/pcm3730.c
 * Driver for PCM3730 and clones
 * Blaine Lee
 * from pcl725 by David S.
 */
/*
Driver: pcm3730
Description: PCM3730
Author: Blaine Lee
Devices: [Advantech] PCM-3730 (pcm3730)
Status: unknown

Configuration options:
  [0] - I/O port base
*/

#include "../comedidev.h"

#include <linux/ioport.h>

#define PCM3730_SIZE 4      /*  consecutive io port addresses */

#define PCM3730_DOA 0       /*  offsets for each port */
#define PCM3730_DOB 2
#define PCM3730_DOC 3
#define PCM3730_DIA 0
#define PCM3730_DIB 2
#define PCM3730_DIC 3

static int pcm3730_do_insn_bits(struct comedi_device *dev,
                struct comedi_subdevice *s,
                struct comedi_insn *insn, unsigned int *data)
{
    if (data[0]) {
        s->state &= ~data[0];
        s->state |= (data[0] & data[1]);
        outb(s->state, dev->iobase + (unsigned long)(s->private));
    }
    data[1] = s->state;

    return insn->n;
}

static int pcm3730_di_insn_bits(struct comedi_device *dev,
                struct comedi_subdevice *s,
                struct comedi_insn *insn, unsigned int *data)
{
    data[1] = inb(dev->iobase + (unsigned long)(s->private));
    return insn->n;
}

static int pcm3730_attach(struct comedi_device *dev,
              struct comedi_devconfig *it)
{
    struct comedi_subdevice *s;
    unsigned long iobase;
    int ret;

    iobase = it->options[0];
    printk(KERN_INFO "comedi%d: pcm3730: 0x%04lx ", dev->minor, iobase);
    if (!request_region(iobase, PCM3730_SIZE, "pcm3730")) {
        printk("I/O port conflict\n");
        return -EIO;
    }
    dev->iobase = iobase;
    dev->board_name = "pcm3730";
    dev->iobase = dev->iobase;
    dev->irq = 0;

    ret = comedi_alloc_subdevices(dev, 6);
    if (ret)
        return ret;

    s = &dev->subdevices[0];
    s->type = COMEDI_SUBD_DO;
    s->subdev_flags = SDF_WRITABLE;
    s->maxdata = 1;
    s->n_chan = 8;
    s->insn_bits = pcm3730_do_insn_bits;
    s->range_table = &range_digital;
    s->private = (void *)PCM3730_DOA;

    s = &dev->subdevices[1];
    s->type = COMEDI_SUBD_DO;
    s->subdev_flags = SDF_WRITABLE;
    s->maxdata = 1;
    s->n_chan = 8;
    s->insn_bits = pcm3730_do_insn_bits;
    s->range_table = &range_digital;
    s->private = (void *)PCM3730_DOB;

    s = &dev->subdevices[2];
    s->type = COMEDI_SUBD_DO;
    s->subdev_flags = SDF_WRITABLE;
    s->maxdata = 1;
    s->n_chan = 8;
    s->insn_bits = pcm3730_do_insn_bits;
    s->range_table = &range_digital;
    s->private = (void *)PCM3730_DOC;

    s = &dev->subdevices[3];
    s->type = COMEDI_SUBD_DI;
    s->subdev_flags = SDF_READABLE;
    s->maxdata = 1;
    s->n_chan = 8;
    s->insn_bits = pcm3730_di_insn_bits;
    s->range_table = &range_digital;
    s->private = (void *)PCM3730_DIA;

    s = &dev->subdevices[4];
    s->type = COMEDI_SUBD_DI;
    s->subdev_flags = SDF_READABLE;
    s->maxdata = 1;
    s->n_chan = 8;
    s->insn_bits = pcm3730_di_insn_bits;
    s->range_table = &range_digital;
    s->private = (void *)PCM3730_DIB;

    s = &dev->subdevices[5];
    s->type = COMEDI_SUBD_DI;
    s->subdev_flags = SDF_READABLE;
    s->maxdata = 1;
    s->n_chan = 8;
    s->insn_bits = pcm3730_di_insn_bits;
    s->range_table = &range_digital;
    s->private = (void *)PCM3730_DIC;

    printk(KERN_INFO "\n");

    return 0;
}

static void pcm3730_detach(struct comedi_device *dev)
{
    if (dev->iobase)
        release_region(dev->iobase, PCM3730_SIZE);
}

static struct comedi_driver pcm3730_driver = {
    .driver_name    = "pcm3730",
    .module     = THIS_MODULE,
    .attach     = pcm3730_attach,
    .detach     = pcm3730_detach,
};
module_comedi_driver(pcm3730_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");