pcl730.c

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/*
 * comedi/drivers/pcl730.c
 * Driver for Advantech PCL-730 and clones
 * José Luis Sánchez
 */
/*
Driver: pcl730
Description: Advantech PCL-730 (& compatibles)
Author: José Luis Sánchez ([email protected])
Status: untested
Devices: [Advantech] PCL-730 (pcl730), [ICP] ISO-730 (iso730),
         [Adlink] ACL-7130 (acl7130)

Interrupts are not supported.
The ACL-7130 card have an 8254 timer/counter not supported by this driver.
*/

#include "../comedidev.h"

#include <linux/ioport.h>

#define PCL730_SIZE     4
#define ACL7130_SIZE    8
#define PCL730_IDIO_LO  0   /* Isolated Digital I/O low byte (ID0-ID7) */
#define PCL730_IDIO_HI  1   /* Isolated Digital I/O high byte (ID8-ID15) */
#define PCL730_DIO_LO   2   /* TTL Digital I/O low byte (D0-D7) */
#define PCL730_DIO_HI   3   /* TTL Digital I/O high byte (D8-D15) */

struct pcl730_board {

    const char *name;   /*  board name */
    unsigned int io_range;  /*  len of I/O space */
};

static int pcl730_do_insn(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]);
    }
    if (data[0] & 0x00ff)
        outb(s->state & 0xff,
             dev->iobase + ((unsigned long)s->private));
    if (data[0] & 0xff00)
        outb((s->state >> 8),
             dev->iobase + ((unsigned long)s->private) + 1);

    data[1] = s->state;

    return insn->n;
}

static int pcl730_di_insn(struct comedi_device *dev, struct comedi_subdevice *s,
              struct comedi_insn *insn, unsigned int *data)
{
    data[1] = inb(dev->iobase + ((unsigned long)s->private)) |
        (inb(dev->iobase + ((unsigned long)s->private) + 1) << 8);

    return insn->n;
}

static int pcl730_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
    const struct pcl730_board *board = comedi_board(dev);
    struct comedi_subdevice *s;
    unsigned long iobase;
    unsigned int iorange;
    int ret;

    iobase = it->options[0];
    iorange = board->io_range;
    printk(KERN_INFO "comedi%d: pcl730: board=%s 0x%04lx ", dev->minor,
           board->name, iobase);
    if (!request_region(iobase, iorange, "pcl730")) {
        printk("I/O port conflict\n");
        return -EIO;
    }
    dev->board_name = board->name;
    dev->iobase = iobase;
    dev->irq = 0;

    ret = comedi_alloc_subdevices(dev, 4);
    if (ret)
        return ret;

    s = &dev->subdevices[0];
    /* Isolated do */
    s->type = COMEDI_SUBD_DO;
    s->subdev_flags = SDF_WRITABLE;
    s->maxdata = 1;
    s->n_chan = 16;
    s->insn_bits = pcl730_do_insn;
    s->range_table = &range_digital;
    s->private = (void *)PCL730_IDIO_LO;

    s = &dev->subdevices[1];
    /* Isolated di */
    s->type = COMEDI_SUBD_DI;
    s->subdev_flags = SDF_READABLE;
    s->maxdata = 1;
    s->n_chan = 16;
    s->insn_bits = pcl730_di_insn;
    s->range_table = &range_digital;
    s->private = (void *)PCL730_IDIO_LO;

    s = &dev->subdevices[2];
    /* TTL do */
    s->type = COMEDI_SUBD_DO;
    s->subdev_flags = SDF_WRITABLE;
    s->maxdata = 1;
    s->n_chan = 16;
    s->insn_bits = pcl730_do_insn;
    s->range_table = &range_digital;
    s->private = (void *)PCL730_DIO_LO;

    s = &dev->subdevices[3];
    /* TTL di */
    s->type = COMEDI_SUBD_DI;
    s->subdev_flags = SDF_READABLE;
    s->maxdata = 1;
    s->n_chan = 16;
    s->insn_bits = pcl730_di_insn;
    s->range_table = &range_digital;
    s->private = (void *)PCL730_DIO_LO;

    printk(KERN_INFO "\n");

    return 0;
}

static void pcl730_detach(struct comedi_device *dev)
{
    const struct pcl730_board *board = comedi_board(dev);

    if (dev->iobase)
        release_region(dev->iobase, board->io_range);
}

static const struct pcl730_board boardtypes[] = {
    { "pcl730", PCL730_SIZE, },
    { "iso730", PCL730_SIZE, },
    { "acl7130", ACL7130_SIZE, },
};

static struct comedi_driver pcl730_driver = {
    .driver_name    = "pcl730",
    .module     = THIS_MODULE,
    .attach     = pcl730_attach,
    .detach     = pcl730_detach,
    .board_name = &boardtypes[0].name,
    .num_names  = ARRAY_SIZE(boardtypes),
    .offset     = sizeof(struct pcl730_board),
};
module_comedi_driver(pcl730_driver);

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