xref: /drivers/staging/comedi/drivers/addi_apci_2032.c

/*
 * addi_apci_2032.c
 * Copyright (C) 2004,2005  ADDI-DATA GmbH for the source code of this module.
 * Project manager: Eric Stolz
 *
 *	ADDI-DATA GmbH
 *	Dieselstrasse 3
 *	D-77833 Ottersweier
 *	Tel: +19(0)7223/9493-0
 *	Fax: +49(0)7223/9493-92
 *	http://www.addi-data.com
 *	info@addi-data.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.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * You should also find the complete GPL in the COPYING file accompanying
 * this source code.
 */

#include "../comedidev.h"
#include "comedi_fc.h"

/*
 * PCI bar 1 I/O Register map
 */
#define APCI2032_DO_REG			0x00
#define APCI2032_INT_CTRL_REG		0x04
#define APCI2032_INT_CTRL_VCC_ENA	(1 << 0)
#define APCI2032_INT_CTRL_CC_ENA	(1 << 1)
#define APCI2032_INT_STATUS_REG		0x08
#define APCI2032_INT_STATUS_VCC		(1 << 0)
#define APCI2032_INT_STATUS_CC		(1 << 1)
#define APCI2032_STATUS_REG		0x0c
#define APCI2032_STATUS_IRQ		(1 << 0)
#define APCI2032_WDOG_REG		0x10
#define APCI2032_WDOG_RELOAD_REG	0x14
#define APCI2032_WDOG_TIMEBASE		0x18
#define APCI2032_WDOG_CTRL_REG		0x1c
#define APCI2032_WDOG_CTRL_ENABLE	(1 << 0)
#define APCI2032_WDOG_CTRL_SW_TRIG	(1 << 9)
#define APCI2032_WDOG_STATUS_REG	0x20
#define APCI2032_WDOG_STATUS_ENABLED	(1 << 0)
#define APCI2032_WDOG_STATUS_SW_TRIG	(1 << 1)

static unsigned int ui_InterruptData, ui_Type;

struct apci2032_private {
	unsigned int wdog_ctrl;
};

static int apci2032_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];

	s->state = inl(dev->iobase + APCI2032_DO_REG);
	if (mask) {
		s->state &= ~mask;
		s->state |= (bits & mask);

		outl(s->state, dev->iobase + APCI2032_DO_REG);
	}

	data[1] = s->state;

	return insn->n;
}

/*
 * The watchdog subdevice is configured with two INSN_CONFIG instructions:
 *
 * Enable the watchdog and set the reload timeout:
 *	data[0] = INSN_CONFIG_ARM
 *	data[1] = timeout reload value
 *
 * Disable the watchdog:
 *	data[0] = INSN_CONFIG_DISARM
 */
static int apci2032_wdog_insn_config(struct comedi_device *dev,
				     struct comedi_subdevice *s,
				     struct comedi_insn *insn,
				     unsigned int *data)
{
	struct apci2032_private *devpriv = dev->private;
	unsigned int reload;

	switch (data[0]) {
	case INSN_CONFIG_ARM:
		devpriv->wdog_ctrl = APCI2032_WDOG_CTRL_ENABLE;
		reload = data[1] & s->maxdata;
		outw(reload, dev->iobase + APCI2032_WDOG_RELOAD_REG);

		/* Time base is 20ms, let the user know the timeout */
		dev_info(dev->class_dev, "watchdog enabled, timeout:%dms\n",
			20 * reload + 20);
		break;
	case INSN_CONFIG_DISARM:
		devpriv->wdog_ctrl = 0;
		break;
	default:
		return -EINVAL;
	}

	outw(devpriv->wdog_ctrl, dev->iobase + APCI2032_WDOG_CTRL_REG);

	return insn->n;
}

static int apci2032_wdog_insn_write(struct comedi_device *dev,
				    struct comedi_subdevice *s,
				    struct comedi_insn *insn,
				    unsigned int *data)
{
	struct apci2032_private *devpriv = dev->private;
	int i;

	if (devpriv->wdog_ctrl == 0) {
		dev_warn(dev->class_dev, "watchdog is disabled\n");
		return -EINVAL;
	}

	/* "ping" the watchdog */
	for (i = 0; i < insn->n; i++) {
		outw(devpriv->wdog_ctrl | APCI2032_WDOG_CTRL_SW_TRIG,
			dev->iobase + APCI2032_WDOG_CTRL_REG);
	}

	return insn->n;
}

static int apci2032_wdog_insn_read(struct comedi_device *dev,
				   struct comedi_subdevice *s,
				   struct comedi_insn *insn,
				   unsigned int *data)
{
	int i;

	for (i = 0; i < insn->n; i++)
		data[i] = inl(dev->iobase + APCI2032_WDOG_STATUS_REG);

	return insn->n;
}

static int i_APCI2032_ConfigDigitalOutput(struct comedi_device *dev,
					  struct comedi_subdevice *s,
					  struct comedi_insn *insn,
					  unsigned int *data)
{
	unsigned int ul_Command = 0;

	if ((data[0] != 0) && (data[0] != 1)) {
		comedi_error(dev,
			"Not a valid Data !!! ,Data should be 1 or 0\n");
		return -EINVAL;
	}

	if (data[1] == 1)
		ul_Command |= APCI2032_INT_CTRL_VCC_ENA;
	else
		ul_Command &= ~APCI2032_INT_CTRL_VCC_ENA;

	if (data[2] == 1)
		ul_Command |= APCI2032_INT_CTRL_CC_ENA;
	else
		ul_Command &= ~APCI2032_INT_CTRL_CC_ENA;

	outl(ul_Command, dev->iobase + APCI2032_INT_CTRL_REG);
	ui_InterruptData = inl(dev->iobase + APCI2032_INT_CTRL_REG);

	return insn->n;
}

static int i_APCI2032_ReadInterruptStatus(struct comedi_device *dev,
					  struct comedi_subdevice *s,
					  struct comedi_insn *insn,
					  unsigned int *data)
{
	*data = ui_Type;
	return insn->n;
}

static void v_APCI2032_Interrupt(int irq, void *d)
{
	struct comedi_device *dev = d;
	unsigned int ui_DO;

	/* Check if VCC OR CC interrupt has occurred */
	ui_DO = inl(dev->iobase + APCI2032_STATUS_REG) & APCI2032_STATUS_IRQ;

	if (ui_DO == 0) {
		printk("\nInterrupt from unKnown source\n");
	}			/*  if(ui_DO==0) */
	if (ui_DO) {
		/*  Check for Digital Output interrupt Type - 1: Vcc interrupt 2: CC interrupt. */
		ui_Type = inl(dev->iobase + APCI2032_INT_STATUS_REG);
		ui_Type &= (APCI2032_INT_STATUS_VCC | APCI2032_INT_STATUS_CC);
		outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);

		if (ui_Type)
			; /* send an event to indicate the interrupt */
	}
}

static irqreturn_t v_ADDI_Interrupt(int irq, void *d)
{
	v_APCI2032_Interrupt(irq, d);
	return IRQ_RETVAL(1);
}

static int apci2032_reset(struct comedi_device *dev)
{
	ui_Type = 0;
	outl(0x0, dev->iobase + APCI2032_DO_REG);
	outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
	outl(0x0, dev->iobase + APCI2032_WDOG_CTRL_REG);
	outl(0x0, dev->iobase + APCI2032_WDOG_RELOAD_REG);

	return 0;
}

static int apci2032_auto_attach(struct comedi_device *dev,
				unsigned long context_unused)
{
	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
	struct apci2032_private *devpriv;
	struct comedi_subdevice *s;
	int ret;

	dev->board_name = dev->driver->driver_name;

	devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
	if (!devpriv)
		return -ENOMEM;
	dev->private = devpriv;

	ret = comedi_pci_enable(pcidev, dev->board_name);
	if (ret)
		return ret;
	dev->iobase = pci_resource_start(pcidev, 1);

	if (pcidev->irq > 0) {
		ret = request_irq(pcidev->irq, v_ADDI_Interrupt, IRQF_SHARED,
				  dev->board_name, dev);
		if (ret == 0)
			dev->irq = pcidev->irq;
	}

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

	/* Initialize the digital output subdevice */
	s = &dev->subdevices[0];
	s->type		= COMEDI_SUBD_DO;
	s->subdev_flags	= SDF_WRITEABLE;
	s->n_chan	= 32;
	s->maxdata	= 1;
	s->range_table	= &range_digital;
	s->insn_config	= i_APCI2032_ConfigDigitalOutput;
	s->insn_bits	= apci2032_do_insn_bits;
	s->insn_read	= i_APCI2032_ReadInterruptStatus;

	/* Initialize the watchdog subdevice */
	s = &dev->subdevices[1];
	s->type		= COMEDI_SUBD_TIMER;
	s->subdev_flags	= SDF_WRITEABLE;
	s->n_chan	= 1;
	s->maxdata	= 0xff;
	s->insn_write	= apci2032_wdog_insn_write;
	s->insn_read	= apci2032_wdog_insn_read;
	s->insn_config	= apci2032_wdog_insn_config;

	apci2032_reset(dev);
	return 0;
}

static void apci2032_detach(struct comedi_device *dev)
{
	struct pci_dev *pcidev = comedi_to_pci_dev(dev);

	if (dev->iobase)
		apci2032_reset(dev);
	if (dev->irq)
		free_irq(dev->irq, dev);
	if (pcidev) {
		if (dev->iobase)
			comedi_pci_disable(pcidev);
	}
}

static struct comedi_driver apci2032_driver = {
	.driver_name	= "addi_apci_2032",
	.module		= THIS_MODULE,
	.auto_attach	= apci2032_auto_attach,
	.detach		= apci2032_detach,
};

static int apci2032_pci_probe(struct pci_dev *dev,
					const struct pci_device_id *ent)
{
	return comedi_pci_auto_config(dev, &apci2032_driver);
}

static void apci2032_pci_remove(struct pci_dev *dev)
{
	comedi_pci_auto_unconfig(dev);
}

static DEFINE_PCI_DEVICE_TABLE(apci2032_pci_table) = {
	{ PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1004) },
	{ 0 }
};
MODULE_DEVICE_TABLE(pci, apci2032_pci_table);

static struct pci_driver apci2032_pci_driver = {
	.name		= "addi_apci_2032",
	.id_table	= apci2032_pci_table,
	.probe		= apci2032_pci_probe,
	.remove		= apci2032_pci_remove,
};
module_comedi_pci_driver(apci2032_driver, apci2032_pci_driver);

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