Staging: comedi: add adl_pci7296 driver

/*

    comedi/drivers/adl_pci7296.c

    COMEDI - Linux Control and Measurement Device Interface

    Copyright (C) 2000 David A. Schleef <ds@schleef.org>

    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_pci7296

Description: Driver for the Adlink PCI-7296 96 ch. digital io board

Devices: [ADLink] PCI-7296 (adl_pci7296)

Author: Jon Grierson <jd@renko.co.uk>

Updated: Mon, 14 Apr 2008 15:05:56 +0100

Status: testing

Configuration Options:

  [0] - PCI bus of device (optional)

  [1] - PCI slot of device (optional)

  If bus/slot is not specified, the first supported

  PCI device found will be used.

*/

#include "../comedidev.h"

#include <linux/kernel.h>

#include "comedi_pci.h"

#include "8255.h"

// #include "8253.h"

#define PORT1A 0

#define PORT2A 4

#define PORT3A 8

#define PORT4A 12

#define PCI_DEVICE_ID_PCI7296 0x7296

static DEFINE_PCI_DEVICE_TABLE(adl_pci7296_pci_table) = {

	{PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7296, PCI_ANY_ID, PCI_ANY_ID, 0,

		0, 0},

	{0}

};

MODULE_DEVICE_TABLE(pci, adl_pci7296_pci_table);

typedef struct {

	int data;

	struct pci_dev *pci_dev;

} adl_pci7296_private;

#define devpriv ((adl_pci7296_private *)dev->private)

static int adl_pci7296_attach(comedi_device * dev, comedi_devconfig * it);

static int adl_pci7296_detach(comedi_device * dev);

static comedi_driver driver_adl_pci7296 = {

      driver_name:"adl_pci7296",

      module:THIS_MODULE,

      attach:adl_pci7296_attach,

      detach:adl_pci7296_detach,

};

static int adl_pci7296_attach(comedi_device * dev, comedi_devconfig * it)

{

	struct pci_dev *pcidev;

	comedi_subdevice *s;

	int bus, slot;

	int ret;

	printk("comedi: attempt to attach...\n");

	printk("comedi%d: adl_pci7432\n", dev->minor);

	dev->board_name = "pci7432";

	bus = it->options[0];

	slot = it->options[1];

	if (alloc_private(dev, sizeof(adl_pci7296_private)) < 0)

		return -ENOMEM;

	if (alloc_subdevices(dev, 4) < 0)

		return -ENOMEM;

	for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);

		pcidev != NULL;

		pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {

		if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&

			pcidev->device == PCI_DEVICE_ID_PCI7296) {

			if (bus || slot) {

				/* requested particular bus/slot */

				if (pcidev->bus->number != bus

					|| PCI_SLOT(pcidev->devfn) != slot) {

					continue;

				}

			}

			devpriv->pci_dev = pcidev;

			if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {

				printk("comedi%d: Failed to enable PCI device and request regions\n", dev->minor);

				return -EIO;

			}

			dev->iobase = pci_resource_start(pcidev, 2);

			printk("comedi: base addr %4lx\n", dev->iobase);

			// four 8255 digital io subdevices

			s = dev->subdevices + 0;

			subdev_8255_init(dev, s, NULL,

				(unsigned long)(dev->iobase));

			s = dev->subdevices + 1;

			ret = subdev_8255_init(dev, s, NULL,

				(unsigned long)(dev->iobase + PORT2A));

			if (ret < 0)

				return ret;

			s = dev->subdevices + 2;

			ret = subdev_8255_init(dev, s, NULL,

				(unsigned long)(dev->iobase + PORT3A));

			if (ret < 0)

				return ret;

			s = dev->subdevices + 3;

			ret = subdev_8255_init(dev, s, NULL,

				(unsigned long)(dev->iobase + PORT4A));

			if (ret < 0)

				return ret;

			printk("attached\n");

			return 1;

		}

	}

	printk("comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",

		dev->minor, bus, slot);

	return -EIO;

}

static int adl_pci7296_detach(comedi_device * dev)

{

	printk("comedi%d: pci7432: remove\n", dev->minor);

	if (devpriv && devpriv->pci_dev) {

		if (dev->iobase) {

			comedi_pci_disable(devpriv->pci_dev);

		}

		pci_dev_put(devpriv->pci_dev);

	}

	// detach four 8255 digital io subdevices

	if (dev->subdevices) {

		subdev_8255_cleanup(dev, dev->subdevices + 0);

		subdev_8255_cleanup(dev, dev->subdevices + 1);

		subdev_8255_cleanup(dev, dev->subdevices + 2);

		subdev_8255_cleanup(dev, dev->subdevices + 3);

	}

	return 0;

}

COMEDI_PCI_INITCLEANUP(driver_adl_pci7296, adl_pci7296_pci_table);