/*
    comedi/drivers/adl_pci7230.c

    Hardware comedi driver fot PCI7230 Adlink card
    Copyright (C) 2010 David Fernandez <dfcastelao@gmail.com>

    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_pci7230
Description: Driver for the Adlink PCI-7230 32 ch. isolated digital io board
Devices: [ADLink] PCI-7230 (adl_pci7230)
Author: David Fernandez <dfcastelao@gmail.com>
Status: experimental
Updated: Mon, 14 Apr 2008 15:08:14 +0100

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>

#define PCI7230_DI      0x00
#define PCI7230_DO	    0x00

#define PCI_DEVICE_ID_PCI7230 0x7230

static int adl_pci7230_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]);

		outl((s->state  << 16) & 0xffffffff, dev->iobase + PCI7230_DO);
	}

	return insn->n;
}

static int adl_pci7230_di_insn_bits(struct comedi_device *dev,
	struct comedi_subdevice *s,
	struct comedi_insn *insn,
	unsigned int *data)
{
	data[1] = inl(dev->iobase + PCI7230_DI) & 0xffffffff;

	return insn->n;
}

static struct pci_dev *adl_pci7230_find_pci(struct comedi_device *dev,
	struct comedi_devconfig *it)
{
	struct pci_dev *pcidev = NULL;
	int bus = it->options[0];
	int slot = it->options[1];

	for_each_pci_dev(pcidev) {
		if (pcidev->vendor != PCI_VENDOR_ID_ADLINK ||
		    pcidev->device != PCI_DEVICE_ID_PCI7230)
			continue;
		if (bus || slot) {
			/* requested particular bus/slot */
			if (pcidev->bus->number != bus ||
			    PCI_SLOT(pcidev->devfn) != slot)
				continue;
		}
		return pcidev;
	}
	printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
		dev->minor, bus, slot);
	return NULL;
}

static int adl_pci7230_attach(struct comedi_device *dev,
	struct comedi_devconfig *it)
{
	struct comedi_subdevice *s;
	struct pci_dev *pcidev;
	int ret;

	printk(KERN_INFO "comedi%d: adl_pci7230\n", dev->minor);

	dev->board_name = "pci7230";

	ret = comedi_alloc_subdevices(dev, 2);
	if (ret)
		return ret;

	pcidev = adl_pci7230_find_pci(dev, it);
	if (!pcidev)
		return -EIO;
	comedi_set_hw_dev(dev, &pcidev->dev);

	if (comedi_pci_enable(pcidev, "adl_pci7230") < 0) {
		printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n",
			dev->minor);
		return -EIO;
	}
	dev->iobase = pci_resource_start(pcidev, 2);
	printk(KERN_DEBUG "comedi: base addr %4lx\n", dev->iobase);

	s = dev->subdevices + 0;
	/* Isolated do */
	s->type = COMEDI_SUBD_DO;
	s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
	s->n_chan = 16;
	s->maxdata = 1;
	s->range_table = &range_digital;
	s->insn_bits = adl_pci7230_do_insn_bits;

	s = dev->subdevices + 1;
	/* Isolated di */
	s->type = COMEDI_SUBD_DI;
	s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_COMMON;
	s->n_chan = 16;
	s->maxdata = 1;
	s->range_table = &range_digital;
	s->insn_bits = adl_pci7230_di_insn_bits;

	printk(KERN_DEBUG "comedi: attached\n");

	return 1;
}

static void adl_pci7230_detach(struct comedi_device *dev)
{
	struct pci_dev *pcidev = comedi_to_pci_dev(dev);

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

static struct comedi_driver adl_pci7230_driver = {
	.driver_name	= "adl_pci7230",
	.module		= THIS_MODULE,
	.attach		= adl_pci7230_attach,
	.detach		= adl_pci7230_detach,
};

static int __devinit adl_pci7230_pci_probe(struct pci_dev *dev,
					   const struct pci_device_id *ent)
{
	return comedi_pci_auto_config(dev, &adl_pci7230_driver);
}

static void __devexit adl_pci7230_pci_remove(struct pci_dev *dev)
{
	comedi_pci_auto_unconfig(dev);
}

static DEFINE_PCI_DEVICE_TABLE(adl_pci7230_pci_table) = {
	{ PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7230) },
	{ 0 }
};
MODULE_DEVICE_TABLE(pci, adl_pci7230_pci_table);

static struct pci_driver adl_pci7230_pci_driver = {
	.name		= "adl_pci7230",
	.id_table	= adl_pci7230_pci_table,
	.probe		= adl_pci7230_pci_probe,
	.remove		= __devexit_p(adl_pci7230_pci_remove),
};
module_comedi_pci_driver(adl_pci7230_driver, adl_pci7230_pci_driver);

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