drivers/staging/comedi/drivers/contec_pci_dio.c

/*
    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"

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

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

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

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

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

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

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

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

	return insn->n;
}

static struct pci_dev *contec_find_pci_dev(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 (bus || slot) {
			if (bus != pcidev->bus->number ||
				slot != PCI_SLOT(pcidev->devfn))
				continue;
		}
		if (pcidev->vendor != PCI_VENDOR_ID_CONTEC ||
		    pcidev->device != PCI_DEVICE_ID_PIO1616L)
			continue;

		dev->board_ptr = contec_boards + 0;
		return pcidev;
	}
	dev_err(dev->class_dev,
		"No supported board found! (req. bus %d, slot %d)\n",
		bus, slot);
	return NULL;
}

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

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

	dev->board_name = thisboard->name;

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

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

	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);

	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;
}

static void contec_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 contec_pci_dio_driver = {
	.driver_name	= "contec_pci_dio",
	.module		= THIS_MODULE,
	.attach		= contec_attach,
	.detach		= contec_detach,
};

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

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

static DEFINE_PCI_DEVICE_TABLE(contec_pci_dio_pci_table) = {
	{ PCI_DEVICE(PCI_VENDOR_ID_CONTEC, PCI_DEVICE_ID_PIO1616L),
		.driver_data = PIO1616L },
	{ 0 }
};
MODULE_DEVICE_TABLE(pci, contec_pci_dio_pci_table);

static struct pci_driver contec_pci_dio_pci_driver = {
	.name		= "contec_pci_dio",
	.id_table	= contec_pci_dio_pci_table,
	.probe		= contec_pci_dio_pci_probe,
	.remove		= __devexit_p(contec_pci_dio_pci_remove),
};
module_comedi_pci_driver(contec_pci_dio_driver, contec_pci_dio_pci_driver);

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