adl_pci6208.c

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/*
    comedi/drivers/adl_pci6208.c

    Hardware driver for ADLink 6208 series cards:
    card         | voltage output    | current output
    -------------+-------------------+---------------
    PCI-6208V    |  8 channels       | -
    PCI-6216V    | 16 channels       | -
    PCI-6208A    |  8 channels       | 8 channels

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 2000 David A. Schleef <[email protected]>

    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: adl_pci6208
Description: ADLink PCI-6208/6216 Series Multi-channel Analog Output Cards
Devices: (ADLink) PCI-6208 [adl_pci6208]
     (ADLink) PCI-6216 [adl_pci6216]
Author: nsyeow <[email protected]>
Updated: Fri, 30 Jan 2004 14:44:27 +0800
Status: untested

Configuration Options: not applicable, uses PCI auto config

References:
    - ni_660x.c
    - adl_pci9111.c     copied the entire pci setup section
    - adl_pci9118.c
*/

#include "../comedidev.h"

/*
 * ADLINK PCI Device ID's supported by this driver
 */
#define PCI_DEVICE_ID_PCI6208       0x6208
#define PCI_DEVICE_ID_PCI6216       0x6216

/*
 * PCI-6208/6216-GL register map
 */
#define PCI6208_AO_CONTROL(x)       (0x00 + (2 * (x)))
#define PCI6208_AO_STATUS       0x00
#define PCI6208_AO_STATUS_DATA_SEND (1 << 0)
#define PCI6208_DIO         0x40
#define PCI6208_DIO_DO_MASK     (0x0f)
#define PCI6208_DIO_DO_SHIFT        (0)
#define PCI6208_DIO_DI_MASK     (0xf0)
#define PCI6208_DIO_DI_SHIFT        (4)

#define PCI6208_MAX_AO_CHANNELS     16

struct pci6208_board {
    const char *name;
    unsigned short dev_id;
    int ao_chans;
};

static const struct pci6208_board pci6208_boards[] = {
    {
        .name       = "adl_pci6208",
        .dev_id     = PCI_DEVICE_ID_PCI6208,
        .ao_chans   = 8,
    }, {
        .name       = "adl_pci6216",
        .dev_id     = PCI_DEVICE_ID_PCI6216,
        .ao_chans   = 16,
    },
};

struct pci6208_private {
    unsigned int ao_readback[PCI6208_MAX_AO_CHANNELS];
};

static int pci6208_ao_winsn(struct comedi_device *dev,
                struct comedi_subdevice *s,
                struct comedi_insn *insn, unsigned int *data)
{
    struct pci6208_private *devpriv = dev->private;
    int chan = CR_CHAN(insn->chanspec);
    unsigned long invert = 1 << (16 - 1);
    unsigned long value = 0;
    unsigned short status;
    int i;

    for (i = 0; i < insn->n; i++) {
        value = data[i] ^ invert;

        do {
            status = inw(dev->iobase + PCI6208_AO_STATUS);
        } while (status & PCI6208_AO_STATUS_DATA_SEND);

        outw(value, dev->iobase + PCI6208_AO_CONTROL(chan));
    }
    devpriv->ao_readback[chan] = value;

    return insn->n;
}

static int pci6208_ao_rinsn(struct comedi_device *dev,
                struct comedi_subdevice *s,
                struct comedi_insn *insn, unsigned int *data)
{
    struct pci6208_private *devpriv = dev->private;
    int chan = CR_CHAN(insn->chanspec);
    int i;

    for (i = 0; i < insn->n; i++)
        data[i] = devpriv->ao_readback[chan];

    return insn->n;
}

static int pci6208_di_insn_bits(struct comedi_device *dev,
                struct comedi_subdevice *s,
                struct comedi_insn *insn,
                unsigned int *data)
{
    unsigned int val;

    val = inw(dev->iobase + PCI6208_DIO);
    val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;

    data[1] = val;

    return insn->n;
}

static int pci6208_do_insn_bits(struct comedi_device *dev,
                struct comedi_subdevice *s,
                struct comedi_insn *insn,
                unsigned int *data)
{
    unsigned int mask = data[0];
    unsigned int bits = data[1];

    if (mask) {
        s->state &= ~mask;
        s->state |= (bits & mask);

        outw(s->state, dev->iobase + PCI6208_DIO);
    }

    data[1] = s->state;

    return insn->n;
}

static const void *pci6208_find_boardinfo(struct comedi_device *dev,
                      struct pci_dev *pcidev)
{
    const struct pci6208_board *boardinfo;
    int i;

    for (i = 0; i < ARRAY_SIZE(pci6208_boards); i++) {
        boardinfo = &pci6208_boards[i];
        if (boardinfo->dev_id == pcidev->device)
            return boardinfo;
    }
    return NULL;
}

static int pci6208_attach_pci(struct comedi_device *dev,
                  struct pci_dev *pcidev)
{
    const struct pci6208_board *boardinfo;
    struct pci6208_private *devpriv;
    struct comedi_subdevice *s;
    unsigned int val;
    int ret;

    comedi_set_hw_dev(dev, &pcidev->dev);

    boardinfo = pci6208_find_boardinfo(dev, pcidev);
    if (!boardinfo)
        return -ENODEV;
    dev->board_ptr = boardinfo;
    dev->board_name = boardinfo->name;

    ret = alloc_private(dev, sizeof(*devpriv));
    if (ret < 0)
        return ret;
    devpriv = dev->private;

    ret = comedi_pci_enable(pcidev, dev->board_name);
    if (ret)
        return ret;
    dev->iobase = pci_resource_start(pcidev, 2);

    ret = comedi_alloc_subdevices(dev, 3);
    if (ret)
        return ret;

    s = &dev->subdevices[0];
    /* analog output subdevice */
    s->type     = COMEDI_SUBD_AO;
    s->subdev_flags = SDF_WRITABLE;
    s->n_chan   = boardinfo->ao_chans;
    s->maxdata  = 0xffff;
    s->range_table  = &range_bipolar10;
    s->insn_write   = pci6208_ao_winsn;
    s->insn_read    = pci6208_ao_rinsn;

    s = &dev->subdevices[1];
    /* digital input subdevice */
    s->type     = COMEDI_SUBD_DI;
    s->subdev_flags = SDF_READABLE;
    s->n_chan   = 4;
    s->maxdata  = 1;
    s->range_table  = &range_digital;
    s->insn_bits    = pci6208_di_insn_bits;

    s = &dev->subdevices[2];
    /* digital output subdevice */
    s->type     = COMEDI_SUBD_DO;
    s->subdev_flags = SDF_WRITABLE;
    s->n_chan   = 4;
    s->maxdata  = 1;
    s->range_table  = &range_digital;
    s->insn_bits    = pci6208_do_insn_bits;

    /*
     * Get the read back signals from the digital outputs
     * and save it as the initial state for the subdevice.
     */
    val = inw(dev->iobase + PCI6208_DIO);
    val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
    s->state    = val;
    s->io_bits  = 0x0f;

    dev_info(dev->class_dev, "%s: %s, I/O base=0x%04lx\n",
        dev->driver->driver_name, dev->board_name, dev->iobase);

    return 0;
}

static void pci6208_detach(struct comedi_device *dev)
{
    struct pci_dev *pcidev = comedi_to_pci_dev(dev);

    if (pcidev) {
        if (dev->iobase)
            comedi_pci_disable(pcidev);
    }
}

static struct comedi_driver adl_pci6208_driver = {
    .driver_name    = "adl_pci6208",
    .module     = THIS_MODULE,
    .attach_pci = pci6208_attach_pci,
    .detach     = pci6208_detach,
};

static int __devinit adl_pci6208_pci_probe(struct pci_dev *dev,
                       const struct pci_device_id *ent)
{
    return comedi_pci_auto_config(dev, &adl_pci6208_driver);
}

static void __devexit adl_pci6208_pci_remove(struct pci_dev *dev)
{
    comedi_pci_auto_unconfig(dev);
}

static DEFINE_PCI_DEVICE_TABLE(adl_pci6208_pci_table) = {
    { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI6208) },
    { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI6216) },
    { 0 }
};
MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);

static struct pci_driver adl_pci6208_pci_driver = {
    .name       = "adl_pci6208",
    .id_table   = adl_pci6208_pci_table,
    .probe      = adl_pci6208_pci_probe,
    .remove     = __devexit_p(adl_pci6208_pci_remove),
};
module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);

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