/*
    comedi/drivers/contec_pci_dio.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: contec_pci_dio
Description: Contec PIO1616L digital I/O board
Devices: [Contec] PIO1616L (contec_pci_dio)
Author: Stefano Rivoir <s.rivoir@gts.it>
Updated: Wed, 27 Jun 2007 13:00:06 +0100
Status: works

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 "comedi_pci.h"

enum contec_model {
	PIO1616L = 0,
};

struct contec_board {
	const char *name;
	int model;
	int in_ports;
	int out_ports;
	int in_offs;
	int out_offs;
	int out_boffs;
};
static const struct contec_board contec_boards[] = {
	{"PIO1616L", PIO1616L, 16, 16, 0, 2, 10},
};

#define PCI_DEVICE_ID_PIO1616L 0x8172
static DEFINE_PCI_DEVICE_TABLE(contec_pci_table) = {
	{ PCI_DEVICE(PCI_VENDOR_ID_CONTEC, PCI_DEVICE_ID_PIO1616L),
		.driver_data = PIO1616L },
	{0}
};

MODULE_DEVICE_TABLE(pci, contec_pci_table);

#define thisboard ((const struct contec_board *)dev->board_ptr)

struct contec_private {
	int data;

	struct pci_dev *pci_dev;

};

#define devpriv ((struct contec_private *)dev->private)

static int contec_attach(struct comedi_device *dev,
			 struct comedi_devconfig *it);
static int contec_detach(struct comedi_device *dev);
static struct comedi_driver driver_contec = {
	.driver_name = "contec_pci_dio",
	.module = THIS_MODULE,
	.attach = contec_attach,
	.detach = contec_detach,
};

/* Classic digital IO */
static int contec_di_insn_bits(struct comedi_device *dev,
			       struct comedi_subdevice *s,
			       struct comedi_insn *insn, unsigned int *data);
static int contec_do_insn_bits(struct comedi_device *dev,
			       struct comedi_subdevice *s,
			       struct comedi_insn *insn, unsigned int *data);

#if 0
static int contec_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
			  struct comedi_cmd *cmd);

static int contec_ns_to_timer(unsigned int *ns, int round);
#endif

static int contec_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
	struct pci_dev *pcidev = NULL;
	struct comedi_subdevice *s;

	printk("comedi%d: contec: ", dev->minor);

	dev->board_name = thisboard->name;

	if (alloc_private(dev, sizeof(struct contec_private)) < 0)
		return -ENOMEM;

	if (alloc_subdevices(dev, 2) < 0)
		return -ENOMEM;

	for_each_pci_dev(pcidev) {
		if (pcidev->vendor == PCI_VENDOR_ID_CONTEC &&
		    pcidev->device == PCI_DEVICE_ID_PIO1616L) {
			if (it->options[0] || it->options[1]) {
				/* Check bus and slot. */
				if (it->options[0] != pcidev->bus->number ||
				    it->options[1] != PCI_SLOT(pcidev->devfn)) {
					continue;
				}
			}
			devpriv->pci_dev = pcidev;
			if (comedi_pci_enable(pcidev, "contec_pci_dio")) {
				printk
				    ("error enabling PCI device and request regions!\n");
				return -EIO;
			}
			dev->iobase = pci_resource_start(pcidev, 0);
			printk(" base addr %lx ", dev->iobase);

			dev->board_ptr = contec_boards + 0;

			s = dev->subdevices + 0;

			s->type = COMEDI_SUBD_DI;
			s->subdev_flags = SDF_READABLE;
			s->n_chan = 16;
			s->maxdata = 1;
			s->range_table = &range_digital;
			s->insn_bits = contec_di_insn_bits;

			s = dev->subdevices + 1;
			s->type = COMEDI_SUBD_DO;
			s->subdev_flags = SDF_WRITABLE;
			s->n_chan = 16;
			s->maxdata = 1;
			s->range_table = &range_digital;
			s->insn_bits = contec_do_insn_bits;

			printk("attached\n");

			return 1;
		}
	}

	printk("card not present!\n");

	return -EIO;
}

static int contec_detach(struct comedi_device *dev)
{
	printk("comedi%d: contec: remove\n", dev->minor);

	if (devpriv && devpriv->pci_dev) {
		if (dev->iobase)
			comedi_pci_disable(devpriv->pci_dev);
		pci_dev_put(devpriv->pci_dev);
	}

	return 0;
}

#if 0
static int contec_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
			  struct comedi_cmd *cmd)
{
	printk("contec_cmdtest called\n");
	return 0;
}

static int contec_ns_to_timer(unsigned int *ns, int round)
{
	return *ns;
}
#endif

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

	dev_dbg(dev->hw_dev, "contec_do_insn_bits called\n");
	dev_dbg(dev->hw_dev, "data: %d %d\n", data[0], data[1]);

	if (insn->n != 2)
		return -EINVAL;

	if (data[0]) {
		s->state &= ~data[0];
		s->state |= data[0] & data[1];
		dev_dbg(dev->hw_dev, "out: %d on %lx\n", s->state,
			dev->iobase + thisboard->out_offs);
		outw(s->state, dev->iobase + thisboard->out_offs);
	}
	return 2;
}

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

	dev_dbg(dev->hw_dev, "contec_di_insn_bits called\n");
	dev_dbg(dev->hw_dev, "data: %d %d\n", data[0], data[1]);

	if (insn->n != 2)
		return -EINVAL;

	data[1] = inw(dev->iobase + thisboard->in_offs);

	return 2;
}

static int __devinit driver_contec_pci_probe(struct pci_dev *dev,
					     const struct pci_device_id *ent)
{
	return comedi_pci_auto_config(dev, driver_contec.driver_name);
}

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

static struct pci_driver driver_contec_pci_driver = {
	.id_table = contec_pci_table,
	.probe = &driver_contec_pci_probe,
	.remove = __devexit_p(&driver_contec_pci_remove)
};

static int __init driver_contec_init_module(void)
{
	int retval;

	retval = comedi_driver_register(&driver_contec);
	if (retval < 0)
		return retval;

	driver_contec_pci_driver.name = (char *)driver_contec.driver_name;
	return pci_register_driver(&driver_contec_pci_driver);
}

static void __exit driver_contec_cleanup_module(void)
{
	pci_unregister_driver(&driver_contec_pci_driver);
	comedi_driver_unregister(&driver_contec);
}

module_init(driver_contec_init_module);
module_exit(driver_contec_cleanup_module);

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