Staging: Add the Meilhaus ME-IDS driver package

Originally written by Guenter Gebhardt <g.gebhardt@meilhaus.de>
and Krzysztof Gantzke <k.gantzke@meilhaus.de>

This is the drv/lnx/mod directory of ME-IDS 1.2.9 tarball with
some files from drv/lnx/include.
Signed-off-by: NDavid Kiliani <mail@davidkiliani.de>
Cc: Guenter Gebhardt <g.gebhardt@meilhaus.de>
Cc: Krzysztof Gantzke <k.gantzke@meilhaus.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Kconfig

@@ -49,6 +49,8 @@ source "drivers/staging/sxg/Kconfig"
 
 source "drivers/staging/me4000/Kconfig"
 
+source "drivers/staging/meilhaus/Kconfig"
+
 source "drivers/staging/go7007/Kconfig"
 
 source "drivers/staging/usbip/Kconfig"

drivers/staging/Makefile

@@ -7,6 +7,7 @@ obj-$(CONFIG_ET131X)		+= et131x/
 obj-$(CONFIG_SLICOSS)		+= slicoss/
 obj-$(CONFIG_SXG)		+= sxg/
 obj-$(CONFIG_ME4000)		+= me4000/
+obj-$(CONFIG_MEILHAUS)		+= meilhaus/
 obj-$(CONFIG_VIDEO_GO7007)	+= go7007/
 obj-$(CONFIG_USB_IP_COMMON)	+= usbip/
 obj-$(CONFIG_W35UND)		+= winbond/

drivers/staging/meilhaus/Kconfig

+#
+# Meilhaus configuration
+#
+
+menuconfig MEILHAUS
+	tristate "Meilhaus support"
+	---help---
+	  If you have a Meilhaus card, say Y (or M) here.
+
+	  You need both this driver, and the driver for the particular
+	  data collection card.
+
+	  To compile this driver as a module, choose M here. The module will
+	  be called memain.
+
+if MEILHAUS
+
+config ME0600
+	tristate "Meilhaus ME-600 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-600 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me0600.
+
+config ME0900
+	tristate "Meilhaus ME-900 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-900 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me0900.
+
+config ME1000
+	tristate "Meilhaus ME-1000 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-1000 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me1000.
+
+config ME1400
+	tristate "Meilhaus ME-1400 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-1400 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me1400.
+
+config ME1600
+	tristate "Meilhaus ME-1600 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-1600 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me1600.
+
+config ME4600
+	tristate "Meilhaus ME-4600 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-4600 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me4600.
+
+config ME6000
+	tristate "Meilhaus ME-6000 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-6000 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me6000.
+
+config ME8100
+	tristate "Meilhaus ME-8100 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-8100 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me8100.
+
+config ME8200
+	tristate "Meilhaus ME-8200 support"
+	default n
+	depends on PCI
+	help
+	  This driver supports the Meilhaus ME-8200 family of boards
+	  that do data collection and multipurpose I/O.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called me8200.
+
+config MEDUMMY
+	tristate "Meilhaus dummy driver"
+	default n
+	depends on PCI
+	help
+	  This provides a dummy driver for the Meilhaus driver package
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called medummy.
+
+endif # MEILHAUS

drivers/staging/meilhaus/Makefile

+#
+# Makefile for Meilhaus linux driver system
+#
+
+obj-$(CONFIG_MEILHAUS) += memain.o
+obj-$(CONFIG_ME1600) += me1600.o
+obj-$(CONFIG_ME1000) += me1000.o
+obj-$(CONFIG_ME1400) += me1400.o
+obj-$(CONFIG_ME4600) += me4600.o
+obj-$(CONFIG_ME6000) += me6000.o
+obj-$(CONFIG_ME0600) += me0600.o
+obj-$(CONFIG_ME8100) += me8100.o
+obj-$(CONFIG_ME8200) += me8200.o
+obj-$(CONFIG_ME0900) += me0900.o
+obj-$(CONFIG_MEDUMMY) += medummy.o
+
+
+me1600-objs := medevice.o medlist.o medlock.o me1600_device.o
+me1600-objs += mesubdevice.o meslist.o meslock.o me1600_ao.o
+
+me1000-objs := medevice.o medlist.o medlock.o me1000_device.o
+me1000-objs += mesubdevice.o meslist.o meslock.o me1000_dio.o
+
+me1400-objs := medevice.o medlist.o medlock.o me1400_device.o
+me1400-objs += mesubdevice.o meslist.o meslock.o me8254.o me8255.o me1400_ext_irq.o
+
+me4600-objs := medevice.o medlist.o medlock.o mefirmware.o me4600_device.o
+me4600-objs += mesubdevice.o meslist.o meslock.o me4600_do.o me4600_di.o me4600_dio.o me8254.o me4600_ai.o me4600_ao.o me4600_ext_irq.o
+
+me6000-objs := medevice.o medlist.o medlock.o mefirmware.o me6000_device.o
+me6000-objs += mesubdevice.o meslist.o meslock.o me6000_dio.o me6000_ao.o
+
+me0600-objs := medevice.o medlist.o medlock.o me0600_device.o
+me0600-objs += mesubdevice.o meslist.o meslock.o me0600_relay.o me0600_ttli.o me0600_optoi.o me0600_dio.o me0600_ext_irq.o
+
+me8100-objs := medevice.o medlist.o medlock.o me8100_device.o
+me8100-objs += mesubdevice.o meslist.o meslock.o me8100_di.o me8100_do.o me8254.o
+
+me8200-objs := medevice.o medlist.o medlock.o me8200_device.o
+me8200-objs += mesubdevice.o meslist.o meslock.o me8200_di.o me8200_do.o me8200_dio.o
+
+me0900-objs := medevice.o medlist.o medlock.o me0900_device.o
+me0900-objs += mesubdevice.o meslist.o meslock.o me0900_do.o me0900_di.o

drivers/staging/meilhaus/TODO

+TODO:
+	- checkpatch.pl cleanups
+	- sparse issues
+	- Lindent
+	- audit userspace interface
+	- handle firmware properly
+	- possible comedi merge
+
+Please send cleanup patches to Greg Kroah-Hartman <greg@kroah.com>
+and CC: David Kiliani <mail@davidkiliani.de>

drivers/staging/meilhaus/me0600_device.c

+/**
+ * @file me0600_device.c
+ *
+ * @brief ME-630 device class implementation.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+#ifndef MODULE
+#  define MODULE
+#endif
+
+#include <linux/module.h>
+
+#include <linux/pci.h>
+#include <linux/slab.h>
+
+#include "meids.h"
+#include "meerror.h"
+#include "mecommon.h"
+#include "meinternal.h"
+
+#include "medebug.h"
+#include "medevice.h"
+#include "me0600_device.h"
+#include "mesubdevice.h"
+#include "me0600_relay.h"
+#include "me0600_ttli.h"
+#include "me0600_optoi.h"
+#include "me0600_dio.h"
+#include "me0600_ext_irq.h"
+
+me_device_t *me0600_pci_constructor(struct pci_dev *pci_device)
+{
+	me0600_device_t *me0600_device;
+	me_subdevice_t *subdevice;
+	unsigned int version_idx;
+	int err;
+	int i;
+
+	PDEBUG("executed.\n");
+
+	// Allocate structure for device instance.
+	me0600_device = kmalloc(sizeof(me0600_device_t), GFP_KERNEL);
+
+	if (!me0600_device) {
+		PERROR("Cannot get memory for device instance.\n");
+		return NULL;
+	}
+
+	memset(me0600_device, 0, sizeof(me0600_device_t));
+
+	// Initialize base class structure.
+	err = me_device_pci_init((me_device_t *) me0600_device, pci_device);
+
+	if (err) {
+		kfree(me0600_device);
+		PERROR("Cannot initialize device base class.\n");
+		return NULL;
+	}
+
+	/* Get the index in the device version information table. */
+	version_idx =
+	    me0600_versions_get_device_index(me0600_device->base.info.pci.
+					     device_id);
+
+	// Initialize spin lock .
+	spin_lock_init(&me0600_device->dio_ctrl_reg_lock);
+	spin_lock_init(&me0600_device->intcsr_lock);
+
+	// Create subdevice instances.
+
+	for (i = 0; i < me0600_versions[version_idx].optoi_subdevices; i++) {
+		subdevice =
+		    (me_subdevice_t *) me0600_optoi_constructor(me0600_device->
+								base.info.pci.
+								reg_bases[2]);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me0600_device);
+			kfree(me0600_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me0600_device->base.slist,
+					    subdevice);
+	}
+
+	for (i = 0; i < me0600_versions[version_idx].relay_subdevices; i++) {
+		subdevice =
+		    (me_subdevice_t *) me0600_relay_constructor(me0600_device->
+								base.info.pci.
+								reg_bases[2]);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me0600_device);
+			kfree(me0600_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me0600_device->base.slist,
+					    subdevice);
+	}
+
+	for (i = 0; i < me0600_versions[version_idx].ttli_subdevices; i++) {
+		subdevice =
+		    (me_subdevice_t *) me0600_ttli_constructor(me0600_device->
+							       base.info.pci.
+							       reg_bases[2]);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me0600_device);
+			kfree(me0600_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me0600_device->base.slist,
+					    subdevice);
+	}
+
+	for (i = 0; i < me0600_versions[version_idx].dio_subdevices; i++) {
+		subdevice =
+		    (me_subdevice_t *) me0600_dio_constructor(me0600_device->
+							      base.info.pci.
+							      reg_bases[2], i,
+							      &me0600_device->
+							      dio_ctrl_reg_lock);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me0600_device);
+			kfree(me0600_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me0600_device->base.slist,
+					    subdevice);
+	}
+
+	for (i = 0; i < me0600_versions[version_idx].ext_irq_subdevices; i++) {
+		subdevice =
+		    (me_subdevice_t *)
+		    me0600_ext_irq_constructor(me0600_device->base.info.pci.
+					       reg_bases[1],
+					       me0600_device->base.info.pci.
+					       reg_bases[2],
+					       &me0600_device->intcsr_lock, i,
+					       me0600_device->base.irq);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me0600_device);
+			kfree(me0600_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me0600_device->base.slist,
+					    subdevice);
+	}
+
+	return (me_device_t *) me0600_device;
+}
+
+// Init and exit of module.
+
+static int __init me0600_init(void)
+{
+	PDEBUG("executed.\n");
+	return 0;
+}
+
+static void __exit me0600_exit(void)
+{
+	PDEBUG("executed.\n");
+}
+
+module_init(me0600_init);
+
+module_exit(me0600_exit);
+
+// Administrative stuff for modinfo.
+MODULE_AUTHOR
+    ("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
+MODULE_DESCRIPTION("Device Driver Module for ME-6xx Device");
+MODULE_SUPPORTED_DEVICE("Meilhaus ME-6xx Devices");
+MODULE_LICENSE("GPL");
+
+// Export the constructor.
+EXPORT_SYMBOL(me0600_pci_constructor);

drivers/staging/meilhaus/me0600_device.h

+/**
+ * @file me0600_device.h
+ *
+ * @brief ME-630 device class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_DEVICE_H
+#define _ME0600_DEVICE_H
+
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+
+#include "medevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief Structure holding ME-630 device capabilities.
+ */
+typedef struct me0600_version {
+	uint16_t device_id;
+	unsigned int relay_subdevices;
+	unsigned int ttli_subdevices;
+	unsigned int optoi_subdevices;
+	unsigned int dio_subdevices;
+	unsigned int ext_irq_subdevices;
+} me0600_version_t;
+
+/**
+ * @brief Device capabilities.
+ */
+static me0600_version_t me0600_versions[] = {
+	{PCI_DEVICE_ID_MEILHAUS_ME0630, 1, 1, 1, 2, 2},
+	{0},
+};
+
+#define ME0600_DEVICE_VERSIONS (sizeof(me0600_versions) / sizeof(me0600_version_t) - 1)	/**< Returns the number of entries in #me0600_versions. */
+
+/**
+ * @brief Returns the index of the device entry in #me0600_versions.
+ *
+ * @param device_id The PCI device id of the device to query.
+ * @return The index of the device in #me0600_versions.
+ */
+static inline unsigned int me0600_versions_get_device_index(uint16_t device_id)
+{
+	unsigned int i;
+	for (i = 0; i < ME0600_DEVICE_VERSIONS; i++)
+		if (me0600_versions[i].device_id == device_id)
+			break;
+	return i;
+}
+
+/**
+ * @brief The ME-630 device class structure.
+ */
+typedef struct me0600_device {
+	me_device_t base;			/**< The Meilhaus device base class. */
+
+	/* Child class attributes. */
+	spinlock_t dio_ctrl_reg_lock;
+	spinlock_t intcsr_lock;
+} me0600_device_t;
+
+/**
+ * @brief The ME-630 device class constructor.
+ *
+ * @param pci_device The pci device structure given by the PCI subsystem.
+ *
+ * @return On succes a new ME-630 device instance. \n
+ *         NULL on error.
+ */
+me_device_t *me0600_pci_constructor(struct pci_dev *pci_device)
+    __attribute__ ((weak));
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_dio.c

+/**
+ * @file me0600_dio.c
+ *
+ * @brief ME-630 digital input/output subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+
+#include "medebug.h"
+#include "me0600_dio_reg.h"
+#include "me0600_dio.h"
+
+/*
+ * Defines
+ */
+
+/*
+ * Functions
+ */
+
+static int me0600_dio_io_reset_subdevice(struct me_subdevice *subdevice,
+					 struct file *filep, int flags)
+{
+	me0600_dio_subdevice_t *instance;
+	uint8_t mode;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_dio_subdevice_t *) subdevice;
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->ctrl_reg_lock);
+	mode = inb(instance->ctrl_reg);
+	mode &= ~(0x3 << (instance->dio_idx * 2));
+	outb(mode, instance->ctrl_reg);
+	PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
+		   instance->ctrl_reg - instance->reg_base, mode);
+	spin_unlock(instance->ctrl_reg_lock);
+
+	outb(0x00, instance->port_reg);
+	PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
+		   instance->port_reg - instance->reg_base, 0x00);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_dio_io_single_config(me_subdevice_t * subdevice,
+				       struct file *filep,
+				       int channel,
+				       int single_config,
+				       int ref,
+				       int trig_chan,
+				       int trig_type, int trig_edge, int flags)
+{
+	me0600_dio_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	uint8_t mode;
+	int size =
+	    flags & (ME_IO_SINGLE_CONFIG_DIO_BIT | ME_IO_SINGLE_CONFIG_DIO_BYTE
+		     | ME_IO_SINGLE_CONFIG_DIO_WORD |
+		     ME_IO_SINGLE_CONFIG_DIO_DWORD);
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_dio_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->ctrl_reg_lock);
+	mode = inb(instance->ctrl_reg);
+	switch (size) {
+	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
+	case ME_IO_SINGLE_CONFIG_DIO_BYTE:
+		if (channel == 0) {
+			if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) {
+				mode &=
+				    ~((ME0600_DIO_CONFIG_BIT_OUT_0) <<
+				      (instance->dio_idx * 2));
+			} else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
+				mode &=
+				    ~((ME0600_DIO_CONFIG_BIT_OUT_0) <<
+				      (instance->dio_idx * 2));
+				mode |=
+				    ME0600_DIO_CONFIG_BIT_OUT_0 << (instance->
+								    dio_idx *
+								    2);
+			} else {
+				PERROR
+				    ("Invalid port configuration specified.\n");
+				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+			}
+		} else {
+			PERROR("Invalid channel number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+
+	if (!err) {
+		outb(mode, instance->ctrl_reg);
+		PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
+			   instance->reg_base,
+			   instance->ctrl_reg - instance->reg_base, mode);
+	}
+	spin_unlock(instance->ctrl_reg_lock);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_dio_io_single_read(me_subdevice_t * subdevice,
+				     struct file *filep,
+				     int channel,
+				     int *value, int time_out, int flags)
+{
+	me0600_dio_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	uint8_t mode;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_dio_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->ctrl_reg_lock);
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			mode =
+			    inb(instance->
+				ctrl_reg) & ((ME0600_DIO_CONFIG_BIT_OUT_0) <<
+					     (instance->dio_idx * 2));
+
+			if ((mode ==
+			     (ME0600_DIO_CONFIG_BIT_OUT_0 <<
+			      (instance->dio_idx * 2))) || !mode) {
+				*value =
+				    inb(instance->
+					port_reg) & (0x0001 << channel);
+			} else {
+				PERROR("Port not in output or input mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			mode =
+			    inb(instance->
+				ctrl_reg) & ((ME0600_DIO_CONFIG_BIT_OUT_0) <<
+					     (instance->dio_idx * 2));
+
+			if ((mode ==
+			     (ME0600_DIO_CONFIG_BIT_OUT_0 <<
+			      (instance->dio_idx * 2))) || !mode) {
+				*value = inb(instance->port_reg) & 0x00FF;
+			} else {
+				PERROR("Port not in output or input mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+
+		err = ME_ERRNO_INVALID_FLAGS;
+
+		break;
+	}
+	spin_unlock(instance->ctrl_reg_lock);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_dio_io_single_write(me_subdevice_t * subdevice,
+				      struct file *filep,
+				      int channel,
+				      int value, int time_out, int flags)
+{
+	me0600_dio_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	uint8_t mode;
+	uint8_t byte;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_dio_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->ctrl_reg_lock);
+	switch (flags) {
+
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			mode =
+			    inb(instance->
+				ctrl_reg) & ((ME0600_DIO_CONFIG_BIT_OUT_0) <<
+					     (instance->dio_idx * 2));
+
+			if (mode ==
+			    (ME0600_DIO_CONFIG_BIT_OUT_0 <<
+			     (instance->dio_idx * 2))) {
+				byte = inb(instance->port_reg);
+
+				if (value)
+					byte |= 0x1 << channel;
+				else
+					byte &= ~(0x1 << channel);
+
+				outb(byte, instance->port_reg);
+			} else {
+				PERROR("Port not in output or input mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			mode =
+			    inb(instance->
+				ctrl_reg) & ((ME0600_DIO_CONFIG_BIT_OUT_0) <<
+					     (instance->dio_idx * 2));
+
+			if (mode ==
+			    (ME0600_DIO_CONFIG_BIT_OUT_0 <<
+			     (instance->dio_idx * 2))) {
+				outb(value, instance->port_reg);
+			} else {
+				PERROR("Port not in output or input mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+
+		err = ME_ERRNO_INVALID_FLAGS;
+
+		break;
+	}
+	spin_unlock(instance->ctrl_reg_lock);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_dio_query_number_channels(me_subdevice_t * subdevice,
+					    int *number)
+{
+	PDEBUG("executed.\n");
+	*number = 8;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_dio_query_subdevice_type(me_subdevice_t * subdevice,
+					   int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_DIO;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_dio_query_subdevice_caps(me_subdevice_t * subdevice,
+					   int *caps)
+{
+	PDEBUG("executed.\n");
+	*caps = ME_CAPS_DIO_DIR_BYTE;
+	return ME_ERRNO_SUCCESS;
+}
+
+me0600_dio_subdevice_t *me0600_dio_constructor(uint32_t reg_base,
+					       unsigned int dio_idx,
+					       spinlock_t * ctrl_reg_lock)
+{
+	me0600_dio_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me0600_dio_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for subdevice instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me0600_dio_subdevice_t));
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+
+	subdevice->ctrl_reg_lock = ctrl_reg_lock;
+
+	/* Save digital i/o index */
+	subdevice->dio_idx = dio_idx;
+
+	/* Save the subdevice index */
+	subdevice->ctrl_reg = reg_base + ME0600_DIO_CONFIG_REG;
+	subdevice->port_reg = reg_base + ME0600_DIO_PORT_REG + dio_idx;
+#ifdef MEDEBUG_DEBUG_REG
+	subdevice->reg_base = reg_base;
+#endif
+
+	/* Overload base class methods. */
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me0600_dio_io_reset_subdevice;
+	subdevice->base.me_subdevice_io_single_config =
+	    me0600_dio_io_single_config;
+	subdevice->base.me_subdevice_io_single_read = me0600_dio_io_single_read;
+	subdevice->base.me_subdevice_io_single_write =
+	    me0600_dio_io_single_write;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me0600_dio_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me0600_dio_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me0600_dio_query_subdevice_caps;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me0600_dio.h

+/**
+ * @file me0600_dio.h
+ *
+ * @brief ME-630 digital input/output subdevice class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_DIO_H_
+#define _ME0600_DIO_H_
+
+#include "mesubdevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The template subdevice class.
+ */
+typedef struct me0600_dio_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+	spinlock_t *ctrl_reg_lock;		/**< Spin lock to protect #ctrl_reg from concurrent access. */
+	unsigned int dio_idx;			/**< The index of the digital i/o on the device. */
+
+	unsigned long port_reg;			/**< Register holding the port status. */
+	unsigned long ctrl_reg;			/**< Register to configure the port direction. */
+#ifdef MEDEBUG_DEBUG_REG
+	unsigned long reg_base;
+#endif
+} me0600_dio_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-630 digital input/ouput subdevice instance.
+ *
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ * @param dio_idx The index of the digital i/o port on the device.
+ * @param ctrl_reg_lock Spin lock protecting the control register.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me0600_dio_subdevice_t *me0600_dio_constructor(uint32_t reg_base,
+					       unsigned int dio_idx,
+					       spinlock_t * ctrl_reg_lock);
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_dio_reg.h

+/**
+ * @file me0600_dio_reg.h
+ *
+ * @brief ME-630 digital input/output subdevice register definitions.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_DIO_REG_H_
+#define _ME0600_DIO_REG_H_
+
+#ifdef __KERNEL__
+
+#define ME0600_DIO_CONFIG_REG		0x0007
+#define ME0600_DIO_PORT_0_REG		0x0008
+#define ME0600_DIO_PORT_1_REG		0x0009
+#define ME0600_DIO_PORT_REG			ME0600_DIO_PORT_0_REG
+
+#define ME0600_DIO_CONFIG_BIT_OUT_0	0x0001
+#define ME0600_DIO_CONFIG_BIT_OUT_1	0x0004
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_ext_irq.c

+/**
+ * @file me0600_ext_irq.c
+ *
+ * @brief ME-630 external interrupt subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/version.h>
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+#include "meids.h"
+#include "medebug.h"
+
+#include "meplx_reg.h"
+#include "me0600_ext_irq_reg.h"
+#include "me0600_ext_irq.h"
+
+/*
+ * Functions
+ */
+
+static int me0600_ext_irq_io_irq_start(struct me_subdevice *subdevice,
+				       struct file *filep,
+				       int channel,
+				       int irq_source,
+				       int irq_edge, int irq_arg, int flags)
+{
+	me0600_ext_irq_subdevice_t *instance;
+	uint32_t tmp;
+	unsigned long cpu_flags;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_ext_irq_subdevice_t *) subdevice;
+
+	if (flags & ~ME_IO_IRQ_START_DIO_BIT) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	if (instance->lintno > 1) {
+		PERROR("Wrong idx=%d.\n", instance->lintno);
+		return ME_ERRNO_INVALID_SUBDEVICE;
+	}
+
+	if (channel) {
+		PERROR("Invalid channel specified.\n");
+		return ME_ERRNO_INVALID_CHANNEL;
+	}
+
+	if (irq_source != ME_IRQ_SOURCE_DIO_LINE) {
+		PERROR("Invalid irq source specified.\n");
+		return ME_ERRNO_INVALID_IRQ_SOURCE;
+	}
+
+	if (irq_edge != ME_IRQ_EDGE_RISING) {
+		PERROR("Invalid irq edge specified.\n");
+		return ME_ERRNO_INVALID_IRQ_EDGE;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
+	spin_lock(instance->intcsr_lock);
+	tmp = inl(instance->intcsr);
+	switch (instance->lintno) {
+	case 0:
+		tmp |=
+		    PLX_INTCSR_LOCAL_INT1_EN | PLX_INTCSR_LOCAL_INT1_POL |
+		    PLX_INTCSR_PCI_INT_EN;
+		break;
+	case 1:
+		tmp |=
+		    PLX_INTCSR_LOCAL_INT2_EN | PLX_INTCSR_LOCAL_INT2_POL |
+		    PLX_INTCSR_PCI_INT_EN;
+		break;
+	}
+	outl(tmp, instance->intcsr);
+	PDEBUG_REG("intcsr outl(plx:0x%X)=0x%x\n", instance->intcsr, tmp);
+	spin_unlock(instance->intcsr_lock);
+	instance->rised = 0;
+	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
+
+	ME_SUBDEVICE_EXIT;
+
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_ext_irq_io_irq_wait(struct me_subdevice *subdevice,
+				      struct file *filep,
+				      int channel,
+				      int *irq_count,
+				      int *value, int time_out, int flags)
+{
+	me0600_ext_irq_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	long t = 0;
+	unsigned long cpu_flags;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_ext_irq_subdevice_t *) subdevice;
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	if (channel) {
+		PERROR("Invalid channel specified.\n");
+		return ME_ERRNO_INVALID_CHANNEL;
+	}
+
+	if (time_out < 0) {
+		PERROR("Invalid time_out specified.\n");
+		return ME_ERRNO_INVALID_TIMEOUT;
+	}
+
+	if (time_out) {
+		t = (time_out * HZ) / 1000;
+
+		if (t == 0)
+			t = 1;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	if (instance->rised <= 0) {
+		instance->rised = 0;
+
+		if (time_out) {
+			t = wait_event_interruptible_timeout(instance->
+							     wait_queue,
+							     (instance->rised !=
+							      0), t);
+
+			if (t == 0) {
+				PERROR("Wait on interrupt timed out.\n");
+				err = ME_ERRNO_TIMEOUT;
+			}
+		} else {
+			wait_event_interruptible(instance->wait_queue,
+						 (instance->rised != 0));
+		}
+
+		if (instance->rised < 0) {
+			PERROR("Wait on interrupt aborted by user.\n");
+			err = ME_ERRNO_CANCELLED;
+		}
+	}
+
+	if (signal_pending(current)) {
+		PERROR("Wait on interrupt aborted by signal.\n");
+		err = ME_ERRNO_SIGNAL;
+	}
+
+	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
+	instance->rised = 0;
+	*irq_count = instance->n;
+	*value = 1;
+	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_ext_irq_io_irq_stop(struct me_subdevice *subdevice,
+				      struct file *filep,
+				      int channel, int flags)
+{
+	me0600_ext_irq_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	uint32_t tmp;
+	unsigned long cpu_flags;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_ext_irq_subdevice_t *) subdevice;
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	if (instance->lintno > 1) {
+		PERROR("Wrong idx=%d.\n", instance->lintno);
+		return ME_ERRNO_INVALID_SUBDEVICE;
+	}
+
+	if (channel) {
+		PERROR("Invalid channel specified.\n");
+		return ME_ERRNO_INVALID_CHANNEL;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
+	spin_lock(instance->intcsr_lock);
+	tmp = inl(instance->intcsr);
+	switch (instance->lintno) {
+	case 0:
+		tmp &= ~PLX_INTCSR_LOCAL_INT1_EN;
+		break;
+	case 1:
+		tmp &= ~PLX_INTCSR_LOCAL_INT2_EN;
+		break;
+	}
+	outl(tmp, instance->intcsr);
+	PDEBUG_REG("intcsr outl(plx:0x%X)=0x%x\n", instance->intcsr, tmp);
+	spin_unlock(instance->intcsr_lock);
+	instance->rised = -1;
+	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
+	wake_up_interruptible_all(&instance->wait_queue);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_ext_irq_io_reset_subdevice(struct me_subdevice *subdevice,
+					     struct file *filep, int flags)
+{
+	me0600_ext_irq_subdevice_t *instance;
+	uint32_t tmp;
+	unsigned long cpu_flags;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_ext_irq_subdevice_t *) subdevice;
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
+	spin_lock(instance->intcsr_lock);
+	tmp = inl(instance->intcsr);
+	switch (instance->lintno) {
+	case 0:
+		tmp |= PLX_INTCSR_LOCAL_INT1_POL | PLX_INTCSR_PCI_INT_EN;
+		tmp &= ~PLX_INTCSR_LOCAL_INT1_EN;
+		break;
+	case 1:
+		tmp |= PLX_INTCSR_LOCAL_INT2_POL | PLX_INTCSR_PCI_INT_EN;
+		tmp &= ~PLX_INTCSR_LOCAL_INT2_EN;
+		break;
+	}
+	outl(tmp, instance->intcsr);
+	PDEBUG_REG("intcsr outl(plx:0x%X)=0x%x\n", instance->intcsr, tmp);
+	spin_unlock(instance->intcsr_lock);
+
+	instance->rised = -1;
+	instance->n = 0;
+	spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
+	wake_up_interruptible_all(&instance->wait_queue);
+
+	ME_SUBDEVICE_EXIT;
+
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_ext_irq_query_number_channels(struct me_subdevice *subdevice,
+						int *number)
+{
+	PDEBUG("executed.\n");
+	*number = 1;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_ext_irq_query_subdevice_type(struct me_subdevice *subdevice,
+					       int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_EXT_IRQ;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_ext_irq_query_subdevice_caps(struct me_subdevice *subdevice,
+					       int *caps)
+{
+	PDEBUG("executed.\n");
+	*caps = ME_CAPS_EXT_IRQ_EDGE_RISING;
+	return ME_ERRNO_SUCCESS;
+}
+
+static void me0600_ext_irq_destructor(struct me_subdevice *subdevice)
+{
+	me0600_ext_irq_subdevice_t *instance;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_ext_irq_subdevice_t *) subdevice;
+
+	free_irq(instance->irq, (void *)instance);
+	me_subdevice_deinit(&instance->base);
+	kfree(instance);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
+static irqreturn_t me0600_isr(int irq, void *dev_id)
+#else
+static irqreturn_t me0600_isr(int irq, void *dev_id, struct pt_regs *regs)
+#endif
+{
+	me0600_ext_irq_subdevice_t *instance;
+	uint32_t status;
+	uint32_t mask = PLX_INTCSR_PCI_INT_EN;
+	irqreturn_t ret = IRQ_HANDLED;
+
+	instance = (me0600_ext_irq_subdevice_t *) dev_id;
+
+	if (irq != instance->irq) {
+		PERROR("Incorrect interrupt num: %d.\n", irq);
+		return IRQ_NONE;
+	}
+
+	PDEBUG("executed.\n");
+
+	if (instance->lintno > 1) {
+		PERROR_CRITICAL
+		    ("%s():Wrong subdevice index=%d plx:irq_status_reg=0x%04X.\n",
+		     __FUNCTION__, instance->lintno, inl(instance->intcsr));
+		return IRQ_NONE;
+	}
+
+	spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->intcsr_lock);
+	status = inl(instance->intcsr);
+	switch (instance->lintno) {
+	case 0:
+		mask |= PLX_INTCSR_LOCAL_INT1_STATE | PLX_INTCSR_LOCAL_INT1_EN;
+		break;
+	case 1:
+		mask |= PLX_INTCSR_LOCAL_INT2_STATE | PLX_INTCSR_LOCAL_INT2_EN;
+		break;
+	}
+
+	if ((status & mask) == mask) {
+		instance->rised = 1;
+		instance->n++;
+		inb(instance->reset_reg);
+		PDEBUG("Interrupt detected.\n");
+	} else {
+		PINFO
+		    ("%ld Shared interrupt. %s(): idx=0 plx:irq_status_reg=0x%04X\n",
+		     jiffies, __FUNCTION__, status);
+		ret = IRQ_NONE;
+	}
+	spin_unlock(instance->intcsr_lock);
+	spin_unlock(&instance->subdevice_lock);
+
+	wake_up_interruptible_all(&instance->wait_queue);
+
+	return ret;
+}
+
+me0600_ext_irq_subdevice_t *me0600_ext_irq_constructor(uint32_t plx_reg_base,
+						       uint32_t me0600_reg_base,
+						       spinlock_t * intcsr_lock,
+						       unsigned ext_irq_idx,
+						       int irq)
+{
+	me0600_ext_irq_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me0600_ext_irq_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for 630_ext_irq instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me0600_ext_irq_subdevice_t));
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+
+	subdevice->intcsr_lock = intcsr_lock;
+
+	/* Initialize wait queue */
+	init_waitqueue_head(&subdevice->wait_queue);
+
+	subdevice->lintno = ext_irq_idx;
+
+	/* Request interrupt line */
+	subdevice->irq = irq;
+
+	err = request_irq(subdevice->irq, me0600_isr,
+#ifdef IRQF_DISABLED
+			  IRQF_DISABLED | IRQF_SHARED,
+#else
+			  SA_INTERRUPT | SA_SHIRQ,
+#endif
+			  ME0600_NAME, (void *)subdevice);
+
+	if (err) {
+		PERROR("Cannot get interrupt line.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	PINFO("Registered irq=%d.\n", subdevice->irq);
+
+	/* Initialize registers */
+	subdevice->intcsr = plx_reg_base + PLX_INTCSR;
+	subdevice->reset_reg =
+	    me0600_reg_base + ME0600_INT_0_RESET_REG + ext_irq_idx;
+
+	/* Initialize the subdevice methods */
+	subdevice->base.me_subdevice_io_irq_start = me0600_ext_irq_io_irq_start;
+	subdevice->base.me_subdevice_io_irq_wait = me0600_ext_irq_io_irq_wait;
+	subdevice->base.me_subdevice_io_irq_stop = me0600_ext_irq_io_irq_stop;
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me0600_ext_irq_io_reset_subdevice;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me0600_ext_irq_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me0600_ext_irq_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me0600_ext_irq_query_subdevice_caps;
+	subdevice->base.me_subdevice_destructor = me0600_ext_irq_destructor;
+
+	subdevice->rised = 0;
+	subdevice->n = 0;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me0600_ext_irq.h

+/**
+ * @file me0600_ext_irq.h
+ *
+ * @brief ME-630 external interrupt implementation.
+ * @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+#ifndef _ME0600_EXT_IRQ_H_
+#define _ME0600_EXT_IRQ_H_
+
+#include <linux/sched.h>
+
+#include "mesubdevice.h"
+#include "meslock.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The ME-630 external interrupt subdevice class.
+ */
+typedef struct me0600_ext_irq_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+	spinlock_t *intcsr_lock;		/**< Spin lock to protect #intcsr. */
+
+	wait_queue_head_t wait_queue;		/**< Queue to put on threads waiting for an interrupt. */
+
+	int irq;				/**< The irq number assigned by PCI BIOS. */
+	int rised;				/**< If true an interrupt has occured. */
+	unsigned int n;				/**< The number of interrupt since the driver was loaded. */
+	unsigned int lintno;			/**< The number of the local PCI interrupt. */
+
+	uint32_t intcsr;			/**< The PLX interrupt control and status register. */
+	uint32_t reset_reg;			/**< The control register. */
+} me0600_ext_irq_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-630 external interrupt instance.
+ *
+ * @param plx_reg_base The register base address of the PLX chip as returned by the PCI BIOS.
+ * @param me0600_reg_base The register base address of the ME-630 device as returned by the PCI BIOS.
+ * @param irq The irq assigned by the PCI BIOS.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me0600_ext_irq_subdevice_t *me0600_ext_irq_constructor(uint32_t plx_reg_base,
+						       uint32_t me0600_reg_base,
+						       spinlock_t * intcsr_lock,
+						       unsigned int ext_irq_idx,
+						       int irq);
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_ext_irq_reg.h

+/**
+ * @file me0600_ext_irq_reg.h
+ *
+ * @brief ME-630 external interrupt register definitions.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+#ifndef _ME0600_EXT_IRQ_REG_H_
+#define _ME0600_EXT_IRQ_REG_H_
+
+#ifdef __KERNEL__
+
+#define ME0600_INT_0_RESET_REG     0x0005
+#define ME0600_INT_1_RESET_REG     0x0006
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_optoi.c

+/**
+ * @file me0600_optoi.c
+ *
+ * @brief ME-630 Optoisolated input subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+
+#include "medebug.h"
+#include "me0600_optoi_reg.h"
+#include "me0600_optoi.h"
+
+/*
+ * Defines
+ */
+
+/*
+ * Functions
+ */
+
+static int me0600_optoi_io_reset_subdevice(struct me_subdevice *subdevice,
+					   struct file *filep, int flags)
+{
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	PDEBUG("executed.\n");
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_optoi_io_single_config(me_subdevice_t * subdevice,
+					 struct file *filep,
+					 int channel,
+					 int single_config,
+					 int ref,
+					 int trig_chan,
+					 int trig_type,
+					 int trig_edge, int flags)
+{
+	me0600_optoi_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_optoi_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+
+	switch (flags) {
+	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
+	case ME_IO_SINGLE_CONFIG_DIO_BYTE:
+		if (channel == 0) {
+			if (single_config != ME_SINGLE_CONFIG_DIO_INPUT) {
+				PERROR("Invalid port direction specified.\n");
+				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+			}
+		} else {
+			PERROR("Invalid channel specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+
+		err = ME_ERRNO_INVALID_FLAGS;
+
+		break;
+	}
+
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_optoi_io_single_read(me_subdevice_t * subdevice,
+				       struct file *filep,
+				       int channel,
+				       int *value, int time_out, int flags)
+{
+	me0600_optoi_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_optoi_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			*value = inb(instance->port_reg) & (0x1 << channel);
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			*value = inb(instance->port_reg);
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_optoi_query_number_channels(me_subdevice_t * subdevice,
+					      int *number)
+{
+	PDEBUG("executed.\n");
+	*number = 8;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_optoi_query_subdevice_type(me_subdevice_t * subdevice,
+					     int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_DI;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_optoi_query_subdevice_caps(me_subdevice_t * subdevice,
+					     int *caps)
+{
+	PDEBUG("executed.\n");
+	*caps = 0;
+	return ME_ERRNO_SUCCESS;
+}
+
+me0600_optoi_subdevice_t *me0600_optoi_constructor(uint32_t reg_base)
+{
+	me0600_optoi_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me0600_optoi_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for subdevice instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me0600_optoi_subdevice_t));
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+
+	/* Save the subdevice index */
+	subdevice->port_reg = reg_base + ME0600_OPTO_INPUT_REG;
+
+	/* Overload base class methods. */
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me0600_optoi_io_reset_subdevice;
+	subdevice->base.me_subdevice_io_single_config =
+	    me0600_optoi_io_single_config;
+	subdevice->base.me_subdevice_io_single_read =
+	    me0600_optoi_io_single_read;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me0600_optoi_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me0600_optoi_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me0600_optoi_query_subdevice_caps;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me0600_optoi.h

+/**
+ * @file me0600_optoi.h
+ *
+ * @brief ME-630 Optoisolated input subdevice class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_OPTOI_H_
+#define _ME0600_OPTOI_H_
+
+#include "mesubdevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The template subdevice class.
+ */
+typedef struct me0600_optoi_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+
+	uint32_t port_reg;			/**< Register holding the port status. */
+} me0600_optoi_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-630 Optoisolated input subdevice instance.
+ *
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me0600_optoi_subdevice_t *me0600_optoi_constructor(uint32_t reg_base);
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_optoi_reg.h

+/**
+ * @file me0600_optoi_reg.h
+ *
+ * @brief ME-630 Optoisolated input subdevice register definitions.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_OPTOI_REG_H_
+#define _ME0600_OPTOI_REG_H_
+
+#ifdef __KERNEL__
+
+#define ME0600_OPTO_INPUT_REG      0x0004
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_relay.c

+/**
+ * @file me0600_relay.c
+ *
+ * @brief ME-630 relay subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+
+#include "medebug.h"
+#include "me0600_relay_reg.h"
+#include "me0600_relay.h"
+
+/*
+ * Defines
+ */
+
+/*
+ * Functions
+ */
+
+static int me0600_relay_io_reset_subdevice(struct me_subdevice *subdevice,
+					   struct file *filep, int flags)
+{
+	me0600_relay_subdevice_t *instance;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_relay_subdevice_t *) subdevice;
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	outb(0x0, instance->port_0_reg);
+	PDEBUG_REG("port_0_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
+		   instance->port_0_reg - instance->reg_base, 0);
+	outb(0x0, instance->port_1_reg);
+	PDEBUG_REG("port_1_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
+		   instance->port_1_reg - instance->reg_base, 0);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_relay_io_single_config(me_subdevice_t * subdevice,
+					 struct file *filep,
+					 int channel,
+					 int single_config,
+					 int ref,
+					 int trig_chan,
+					 int trig_type,
+					 int trig_edge, int flags)
+{
+	me0600_relay_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_relay_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+
+	switch (flags) {
+	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
+	case ME_IO_SINGLE_CONFIG_DIO_WORD:
+		if (channel == 0) {
+			if (single_config != ME_SINGLE_CONFIG_DIO_OUTPUT) {
+				PERROR("Invalid word direction specified.\n");
+				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+			}
+		} else {
+			PERROR("Invalid channel specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+
+		err = ME_ERRNO_INVALID_FLAGS;
+
+		break;
+	}
+
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_relay_io_single_read(me_subdevice_t * subdevice,
+				       struct file *filep,
+				       int channel,
+				       int *value, int time_out, int flags)
+{
+	me0600_relay_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_relay_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+
+	switch (flags) {
+
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			*value = inb(instance->port_0_reg) & (0x1 << channel);
+		} else if ((channel >= 8) && (channel < 16)) {
+			*value =
+			    inb(instance->port_1_reg) & (0x1 << (channel - 8));
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			*value = inb(instance->port_0_reg);
+		} else if (channel == 1) {
+			*value = inb(instance->port_1_reg);
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_WORD:
+		if (channel == 0) {
+			*value = (uint32_t) inb(instance->port_1_reg) << 8;
+			*value |= inb(instance->port_0_reg);
+		} else {
+			PERROR("Invalid word number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_relay_io_single_write(me_subdevice_t * subdevice,
+					struct file *filep,
+					int channel,
+					int value, int time_out, int flags)
+{
+	me0600_relay_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	uint8_t state;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_relay_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			state = inb(instance->port_0_reg);
+			state =
+			    value ? (state | (0x1 << channel)) : (state &
+								  ~(0x1 <<
+								    channel));
+			outb(state, instance->port_0_reg);
+		} else if ((channel >= 8) && (channel < 16)) {
+			state = inb(instance->port_1_reg);
+			state =
+			    value ? (state | (0x1 << (channel - 8))) : (state &
+									~(0x1 <<
+									  (channel
+									   -
+									   8)));
+			outb(state, instance->port_1_reg);
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			outb(value, instance->port_0_reg);
+		} else if (channel == 1) {
+			outb(value, instance->port_1_reg);
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_WORD:
+		if (channel == 0) {
+			outb(value, instance->port_0_reg);
+			outb(value >> 8, instance->port_1_reg);
+		} else {
+			PERROR("Invalid word number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+		break;
+	}
+
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_relay_query_number_channels(me_subdevice_t * subdevice,
+					      int *number)
+{
+	PDEBUG("executed.\n");
+	*number = 16;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_relay_query_subdevice_type(me_subdevice_t * subdevice,
+					     int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_DO;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_relay_query_subdevice_caps(me_subdevice_t * subdevice,
+					     int *caps)
+{
+	PDEBUG("executed.\n");
+	*caps = 0;
+	return ME_ERRNO_SUCCESS;
+}
+
+me0600_relay_subdevice_t *me0600_relay_constructor(uint32_t reg_base)
+{
+	me0600_relay_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me0600_relay_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for subdevice instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me0600_relay_subdevice_t));
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+
+	/* Save the subdevice index */
+	subdevice->port_0_reg = reg_base + ME0600_RELAIS_0_REG;
+	subdevice->port_1_reg = reg_base + ME0600_RELAIS_1_REG;
+#ifdef MEDEBUG_DEBUG_REG
+	subdevice->reg_base = reg_base;
+#endif
+
+	/* Overload base class methods. */
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me0600_relay_io_reset_subdevice;
+	subdevice->base.me_subdevice_io_single_config =
+	    me0600_relay_io_single_config;
+	subdevice->base.me_subdevice_io_single_read =
+	    me0600_relay_io_single_read;
+	subdevice->base.me_subdevice_io_single_write =
+	    me0600_relay_io_single_write;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me0600_relay_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me0600_relay_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me0600_relay_query_subdevice_caps;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me0600_relay.h

+/**
+ * @file me0600_relay.h
+ *
+ * @brief ME-630 relay subdevice class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_RELAY_H_
+#define _ME0600_RELAY_H_
+
+#include "mesubdevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The template subdevice class.
+ */
+typedef struct me0600_relay_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+
+	unsigned long port_0_reg;			/**< Register holding the port status. */
+	unsigned long port_1_reg;			/**< Register holding the port status. */
+#ifdef MEDEBUG_DEBUG_REG
+	unsigned long reg_base;
+#endif
+} me0600_relay_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-630 relay subdevice instance.
+ *
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ * @param ctrl_reg_lock Spin lock protecting the control register.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me0600_relay_subdevice_t *me0600_relay_constructor(uint32_t reg_base);
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_relay_reg.h

+/**
+ * @file me0600_relay_reg.h
+ *
+ * @brief ME-630 relay subdevice register definitions.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_RELAY_REG_H_
+#define _ME0600_RELAY_REG_H_
+
+#ifdef __KERNEL__
+
+#define ME0600_RELAIS_0_REG        0x0001
+#define ME0600_RELAIS_1_REG        0x0002
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_ttli.c

+/**
+ * @file me0600_ttli.c
+ *
+ * @brief ME-630 TTL input subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+
+#include "medebug.h"
+#include "me0600_ttli_reg.h"
+#include "me0600_ttli.h"
+
+/*
+ * Defines
+ */
+
+/*
+ * Functions
+ */
+
+static int me0600_ttli_io_reset_subdevice(struct me_subdevice *subdevice,
+					  struct file *filep, int flags)
+{
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	PDEBUG("executed.\n");
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_ttli_io_single_config(me_subdevice_t * subdevice,
+					struct file *filep,
+					int channel,
+					int single_config,
+					int ref,
+					int trig_chan,
+					int trig_type, int trig_edge, int flags)
+{
+	me0600_ttli_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_ttli_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+
+	switch (flags) {
+	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
+	case ME_IO_SINGLE_CONFIG_DIO_BYTE:
+		if (channel == 0) {
+			if (single_config != ME_SINGLE_CONFIG_DIO_INPUT) {
+				PERROR("Invalid port direction specified.\n");
+				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+			}
+		} else {
+			PERROR("Invalid channel specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+
+		err = ME_ERRNO_INVALID_FLAGS;
+
+		break;
+	}
+
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_ttli_io_single_read(me_subdevice_t * subdevice,
+				      struct file *filep,
+				      int channel,
+				      int *value, int time_out, int flags)
+{
+	me0600_ttli_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0600_ttli_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			*value = inb(instance->port_reg) & (0x1 << channel);
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			*value = inb(instance->port_reg);
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0600_ttli_query_number_channels(me_subdevice_t * subdevice,
+					     int *number)
+{
+	PDEBUG("executed.\n");
+	*number = 8;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_ttli_query_subdevice_type(me_subdevice_t * subdevice,
+					    int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_DI;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0600_ttli_query_subdevice_caps(me_subdevice_t * subdevice,
+					    int *caps)
+{
+	PDEBUG("executed.\n");
+	*caps = 0;
+	return ME_ERRNO_SUCCESS;
+}
+
+me0600_ttli_subdevice_t *me0600_ttli_constructor(uint32_t reg_base)
+{
+	me0600_ttli_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me0600_ttli_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for subdevice instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me0600_ttli_subdevice_t));
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+
+	/* Save the subdevice index */
+	subdevice->port_reg = reg_base + ME0600_TTL_INPUT_REG;
+
+	/* Overload base class methods. */
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me0600_ttli_io_reset_subdevice;
+	subdevice->base.me_subdevice_io_single_config =
+	    me0600_ttli_io_single_config;
+	subdevice->base.me_subdevice_io_single_read =
+	    me0600_ttli_io_single_read;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me0600_ttli_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me0600_ttli_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me0600_ttli_query_subdevice_caps;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me0600_ttli.h

+/**
+ * @file me0600_ttli.h
+ *
+ * @brief ME-630 TTL input subdevice class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_TTLI_H_
+#define _ME0600_TTLI_H_
+
+#include "mesubdevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The template subdevice class.
+ */
+typedef struct me0600_ttli_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+
+	uint32_t port_reg;			/**< Register holding the port status. */
+} me0600_ttli_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-630 TTL input subdevice instance.
+ *
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me0600_ttli_subdevice_t *me0600_ttli_constructor(uint32_t reg_base);
+
+#endif
+#endif

drivers/staging/meilhaus/me0600_ttli_reg.h

+/**
+ * @file me0600_ttli_reg.h
+ *
+ * @brief ME-630 TTL input subdevice register definitions.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0600_TTLI_REG_H_
+#define _ME0600_TTLI_REG_H_
+
+#ifdef __KERNEL__
+
+#define ME0600_TTL_INPUT_REG       0x0003
+
+#endif
+#endif

drivers/staging/meilhaus/me0900_device.c

+/**
+ * @file me0900_device.c
+ *
+ * @brief ME-9x device class implementation.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+*/
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+#ifndef MODULE
+#  define MODULE
+#endif
+
+#include <linux/module.h>
+
+#include <linux/pci.h>
+#include <linux/slab.h>
+
+#include "meids.h"
+#include "meerror.h"
+#include "mecommon.h"
+#include "meinternal.h"
+
+#include "medebug.h"
+#include "medevice.h"
+#include "me0900_device.h"
+#include "me0900_reg.h"
+#include "mesubdevice.h"
+#include "me0900_do.h"
+#include "me0900_di.h"
+
+me_device_t *me0900_pci_constructor(struct pci_dev *pci_device)
+{
+	me0900_device_t *me0900_device;
+	me_subdevice_t *subdevice;
+	unsigned int version_idx;
+	int err;
+	int i;
+	int port_shift;
+
+	PDEBUG("executed.\n");
+
+	// Allocate structure for device instance.
+	me0900_device = kmalloc(sizeof(me0900_device_t), GFP_KERNEL);
+
+	if (!me0900_device) {
+		PERROR("Cannot get memory for device instance.\n");
+		return NULL;
+	}
+
+	memset(me0900_device, 0, sizeof(me0900_device_t));
+
+	// Initialize base class structure.
+	err = me_device_pci_init((me_device_t *) me0900_device, pci_device);
+
+	if (err) {
+		kfree(me0900_device);
+		PERROR("Cannot initialize device base class.\n");
+		return NULL;
+	}
+
+	/* Get the index in the device version information table. */
+	version_idx =
+	    me0900_versions_get_device_index(me0900_device->base.info.pci.
+					     device_id);
+
+	/* Initialize 8255 chip to desired mode */
+	if (me0900_device->base.info.pci.device_id ==
+	    PCI_DEVICE_ID_MEILHAUS_ME0940) {
+		outb(0x9B,
+		     me0900_device->base.info.pci.reg_bases[2] +
+		     ME0900_CTRL_REG);
+	} else if (me0900_device->base.info.pci.device_id ==
+		   PCI_DEVICE_ID_MEILHAUS_ME0950) {
+		outb(0x89,
+		     me0900_device->base.info.pci.reg_bases[2] +
+		     ME0900_CTRL_REG);
+		outb(0x00,
+		     me0900_device->base.info.pci.reg_bases[2] +
+		     ME0900_WRITE_ENABLE_REG);
+	} else if (me0900_device->base.info.pci.device_id ==
+		   PCI_DEVICE_ID_MEILHAUS_ME0960) {
+		outb(0x8B,
+		     me0900_device->base.info.pci.reg_bases[2] +
+		     ME0900_CTRL_REG);
+		outb(0x00,
+		     me0900_device->base.info.pci.reg_bases[2] +
+		     ME0900_WRITE_ENABLE_REG);
+	}
+
+	port_shift =
+	    (me0900_device->base.info.pci.device_id ==
+	     PCI_DEVICE_ID_MEILHAUS_ME0960) ? 1 : 0;
+	// Create subdevice instances.
+
+	for (i = 0; i < me0900_versions[version_idx].di_subdevices; i++) {
+		subdevice =
+		    (me_subdevice_t *) me0900_di_constructor(me0900_device->
+							     base.info.pci.
+							     reg_bases[2],
+							     i + port_shift);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me0900_device);
+			kfree(me0900_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me0900_device->base.slist,
+					    subdevice);
+	}
+
+	for (i = 0; i < me0900_versions[version_idx].do_subdevices; i++) {
+		subdevice =
+		    (me_subdevice_t *) me0900_do_constructor(me0900_device->
+							     base.info.pci.
+							     reg_bases[2], i);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me0900_device);
+			kfree(me0900_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me0900_device->base.slist,
+					    subdevice);
+	}
+
+	return (me_device_t *) me0900_device;
+}
+
+// Init and exit of module.
+
+static int __init me0900_init(void)
+{
+	PDEBUG("executed.\n.");
+	return 0;
+}
+
+static void __exit me0900_exit(void)
+{
+	PDEBUG("executed.\n.");
+}
+
+module_init(me0900_init);
+module_exit(me0900_exit);
+
+// Administrative stuff for modinfo.
+MODULE_AUTHOR
+    ("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
+MODULE_DESCRIPTION("Device Driver Module for ME-9x Device");
+MODULE_SUPPORTED_DEVICE("Meilhaus ME-9x Devices");
+MODULE_LICENSE("GPL");
+
+// Export the constructor.
+EXPORT_SYMBOL(me0900_pci_constructor);

drivers/staging/meilhaus/me0900_device.h

+/**
+ * @file me0900_device.h
+ *
+ * @brief ME-0900 (ME-9x) device class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0900_DEVICE_H
+#define _ME0900_DEVICE_H
+
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+
+#include "medevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief Structure holding ME-0900 (ME-9x) device capabilities.
+ */
+typedef struct me0900_version {
+	uint16_t device_id;
+	unsigned int di_subdevices;
+	unsigned int do_subdevices;
+} me0900_version_t;
+
+/**
+ * @brief Device capabilities.
+ */
+static me0900_version_t me0900_versions[] = {
+	{PCI_DEVICE_ID_MEILHAUS_ME0940, 2, 0},
+	{PCI_DEVICE_ID_MEILHAUS_ME0950, 0, 2},
+	{PCI_DEVICE_ID_MEILHAUS_ME0960, 1, 1},
+	{0},
+};
+
+#define ME0900_DEVICE_VERSIONS (sizeof(me0900_versions) / sizeof(me0900_version_t) - 1)	/**< Returns the number of entries in #me0900_versions. */
+
+/**
+ * @brief Returns the index of the device entry in #me0900_versions.
+ *
+ * @param device_id The PCI device id of the device to query.
+ * @return The index of the device in #me0900_versions.
+ */
+static inline unsigned int me0900_versions_get_device_index(uint16_t device_id)
+{
+	unsigned int i;
+	for (i = 0; i < ME0900_DEVICE_VERSIONS; i++)
+		if (me0900_versions[i].device_id == device_id)
+			break;
+	return i;
+}
+
+/**
+ * @brief The ME-0900 (ME-9x) device class structure.
+ */
+typedef struct me0900_device {
+	me_device_t base;			/**< The Meilhaus device base class. */
+} me0900_device_t;
+
+/**
+ * @brief The ME-9x device class constructor.
+ *
+ * @param pci_device The pci device structure given by the PCI subsystem.
+ *
+ * @return On succes a new ME-0900 (ME-9x) device instance. \n
+ *         NULL on error.
+ */
+me_device_t *me0900_pci_constructor(struct pci_dev *pci_device)
+    __attribute__ ((weak));
+
+#endif
+#endif

drivers/staging/meilhaus/me0900_di.c

+/**
+ * @file me0900_di.c
+ *
+ * @brief ME-9x digital input subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/version.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+
+#include "meids.h"
+#include "medebug.h"
+#include "meplx_reg.h"
+#include "me0900_reg.h"
+#include "me0900_di.h"
+
+/*
+ * Defines
+ */
+
+/*
+ * Functions
+ */
+
+static int me0900_di_io_reset_subdevice(struct me_subdevice *subdevice,
+					struct file *filep, int flags)
+{
+	PDEBUG("executed.\n");
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0900_di_io_single_config(me_subdevice_t * subdevice,
+				      struct file *filep,
+				      int channel,
+				      int single_config,
+				      int ref,
+				      int trig_chan,
+				      int trig_type, int trig_edge, int flags)
+{
+	me0900_di_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0900_di_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	switch (flags) {
+	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) {
+			} else {
+				PERROR("Invalid byte direction specified.\n");
+				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+			}
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0900_di_io_single_read(me_subdevice_t * subdevice,
+				    struct file *filep,
+				    int channel,
+				    int *value, int time_out, int flags)
+{
+	me0900_di_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0900_di_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			*value = (~inb(instance->port_reg)) & (0x1 << channel);
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			*value = ~inb(instance->port_reg);
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0900_di_query_number_channels(me_subdevice_t * subdevice,
+					   int *number)
+{
+	PDEBUG("executed.\n");
+	*number = 8;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0900_di_query_subdevice_type(me_subdevice_t * subdevice,
+					  int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_DI;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0900_di_query_subdevice_caps(me_subdevice_t * subdevice, int *caps)
+{
+	PDEBUG("executed.\n");
+	*caps = 0;
+	return ME_ERRNO_SUCCESS;
+}
+
+me0900_di_subdevice_t *me0900_di_constructor(uint32_t reg_base,
+					     unsigned int di_idx)
+{
+	me0900_di_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me0900_di_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for subdevice instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me0900_di_subdevice_t));
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+
+	/* Save the subdevice index. */
+	subdevice->di_idx = di_idx;
+
+	/* Initialize registers */
+	if (di_idx == 0) {
+		subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG;
+		subdevice->port_reg = reg_base + ME0900_PORT_A_REG;
+	} else {
+		subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG;
+		subdevice->port_reg = reg_base + ME0900_PORT_B_REG;
+	}
+#ifdef MEDEBUG_DEBUG_REG
+	subdevice->reg_base = reg_base;
+#endif
+
+	/* Overload base class methods. */
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me0900_di_io_reset_subdevice;
+	subdevice->base.me_subdevice_io_single_config =
+	    me0900_di_io_single_config;
+	subdevice->base.me_subdevice_io_single_read = me0900_di_io_single_read;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me0900_di_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me0900_di_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me0900_di_query_subdevice_caps;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me0900_di.h

+/**
+ * @file me0900_di.h
+ *
+ * @brief ME-9x digital input subdevice class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0900_DI_H_
+#define _ME0900_DI_H_
+
+#include "mesubdevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The template subdevice class.
+ */
+typedef struct me0900_di_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+
+	unsigned int di_idx;
+
+	unsigned long ctrl_reg;
+	unsigned long port_reg;
+#ifdef MEDEBUG_DEBUG_REG
+	unsigned long reg_base;
+#endif
+} me0900_di_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-9x digital input subdevice instance.
+ *
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me0900_di_subdevice_t *me0900_di_constructor(uint32_t me0900_reg_base,
+					     unsigned int di_idx);
+
+#endif
+#endif

drivers/staging/meilhaus/me0900_do.c

+/**
+ * @file me0900_do.c
+ *
+ * @brief ME-9x digital output subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+
+#include "medebug.h"
+#include "me0900_reg.h"
+#include "me0900_do.h"
+
+/*
+ * Defines
+ */
+
+/*
+ * Functions
+ */
+
+static int me0900_do_io_reset_subdevice(struct me_subdevice *subdevice,
+					struct file *filep, int flags)
+{
+	me0900_do_subdevice_t *instance;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0900_do_subdevice_t *) subdevice;
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	outb(0xFF, instance->port_reg);
+	PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
+		   instance->port_reg - instance->reg_base, 0xff);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0900_do_io_single_config(me_subdevice_t * subdevice,
+				      struct file *filep,
+				      int channel,
+				      int single_config,
+				      int ref,
+				      int trig_chan,
+				      int trig_type, int trig_edge, int flags)
+{
+	me0900_do_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0900_do_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	switch (flags) {
+	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
+			} else {
+				PERROR("Invalid byte direction specified.\n");
+				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+			}
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0900_do_io_single_read(me_subdevice_t * subdevice,
+				    struct file *filep,
+				    int channel,
+				    int *value, int time_out, int flags)
+{
+	me0900_do_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0900_do_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			*value = (~inb(instance->port_reg)) & (0x1 << channel);
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			*value = ~inb(instance->port_reg);
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0900_do_io_single_write(me_subdevice_t * subdevice,
+				     struct file *filep,
+				     int channel,
+				     int value, int time_out, int flags)
+{
+	me0900_do_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	unsigned long state;
+
+	PDEBUG("executed.\n");
+
+	instance = (me0900_do_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 8)) {
+			state = inb(instance->port_reg);
+			state =
+			    (!value) ? (state | (0x1 << channel)) : (state &
+								     ~(0x1 <<
+								       channel));
+			outb(state, instance->port_reg);
+		} else {
+			PERROR("Invalid bit number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if (channel == 0) {
+			outb(~(value), instance->port_reg);
+		} else {
+			PERROR("Invalid byte number specified.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me0900_do_query_number_channels(me_subdevice_t * subdevice,
+					   int *number)
+{
+	PDEBUG("executed.\n");
+	*number = 8;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0900_do_query_subdevice_type(me_subdevice_t * subdevice,
+					  int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_DO;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me0900_do_query_subdevice_caps(me_subdevice_t * subdevice, int *caps)
+{
+	PDEBUG("executed.\n");
+	*caps = 0;
+	return ME_ERRNO_SUCCESS;
+}
+
+me0900_do_subdevice_t *me0900_do_constructor(uint32_t reg_base,
+					     unsigned int do_idx)
+{
+	me0900_do_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me0900_do_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for subdevice instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me0900_do_subdevice_t));
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+
+	/* Save the subdevice index */
+	subdevice->do_idx = do_idx;
+
+	/* Initialize registers */
+	if (do_idx == 0) {
+		subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG;
+		subdevice->port_reg = reg_base + ME0900_PORT_A_REG;
+		subdevice->enable_reg = reg_base + ME0900_WRITE_ENABLE_REG;
+		subdevice->disable_reg = reg_base + ME0900_WRITE_DISABLE_REG;
+	} else {
+		subdevice->ctrl_reg = reg_base + ME0900_CTRL_REG;
+		subdevice->port_reg = reg_base + ME0900_PORT_B_REG;
+		subdevice->enable_reg = reg_base + ME0900_WRITE_ENABLE_REG;
+		subdevice->disable_reg = reg_base + ME0900_WRITE_DISABLE_REG;
+	}
+#ifdef MEDEBUG_DEBUG_REG
+	subdevice->reg_base = reg_base;
+#endif
+
+	/* Overload base class methods. */
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me0900_do_io_reset_subdevice;
+	subdevice->base.me_subdevice_io_single_config =
+	    me0900_do_io_single_config;
+	subdevice->base.me_subdevice_io_single_read = me0900_do_io_single_read;
+	subdevice->base.me_subdevice_io_single_write =
+	    me0900_do_io_single_write;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me0900_do_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me0900_do_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me0900_do_query_subdevice_caps;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me0900_do.h

+/**
+ * @file me0900_do.h
+ *
+ * @brief ME-9x digital output subdevice class.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0900_DO_H_
+#define _ME0900_DO_H_
+
+#include "mesubdevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The template subdevice class.
+ */
+typedef struct me0900_do_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+
+	unsigned int do_idx;
+
+	unsigned long ctrl_reg;
+	unsigned long port_reg;
+	unsigned long enable_reg;
+	unsigned long disable_reg;
+#ifdef MEDEBUG_DEBUG_REG
+	unsigned long reg_base;
+#endif
+} me0900_do_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-9x digital output subdevice instance.
+ *
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ * @param do_idx The index of the digital output subdevice on this device.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me0900_do_subdevice_t *me0900_do_constructor(uint32_t reg_base,
+					     unsigned int do_idx);
+
+#endif
+#endif

drivers/staging/meilhaus/me0900_reg.h

+/**
+ * @file me0900_reg.h
+ *
+ * @brief ME-9x register definitions.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME0900_REG_H_
+#define _ME0900_REG_H_
+
+#ifdef __KERNEL__
+
+#define ME0900_PORT_A_REG          0x00
+#define ME0900_PORT_B_REG          0x01
+#define ME0900_PORT_C_REG          0x02
+#define ME0900_CTRL_REG            0x03	// ( ,w)
+#define ME0900_WRITE_ENABLE_REG    0x04	// (r,w)
+#define ME0900_WRITE_DISABLE_REG   0x08	// (r,w)
+
+#endif
+#endif

drivers/staging/meilhaus/me1000_device.c

+/**
+ * @file me1000_device.c
+ *
+ * @brief ME-1000 device class implementation.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+#ifndef MODULE
+#  define MODULE
+#endif
+
+#include <linux/module.h>
+
+#include <linux/pci.h>
+#include <linux/slab.h>
+
+#include "meids.h"
+#include "meerror.h"
+#include "mecommon.h"
+#include "meinternal.h"
+
+#include "medebug.h"
+#include "medevice.h"
+#include "me1000_device.h"
+#include "mesubdevice.h"
+#include "me1000_dio.h"
+
+static int me1000_config_load(me_device_t * me_device, struct file *filep,
+			      me_cfg_device_entry_t * config)
+{
+	me1000_device_t *me1000_device;
+	me1000_dio_subdevice_t *dio;
+
+	PDEBUG("executed.\n");
+
+	me1000_device = (me1000_device_t *) me_device;
+
+	if (config->count == 2) {
+		if (me_slist_get_number_subdevices(&me1000_device->base.slist)
+		    == 2) {
+			// Nothing to do.
+		} else {
+			// Remove 2 extra subdevices
+			dio =
+			    (me1000_dio_subdevice_t *)
+			    me_slist_del_subdevice_tail(&me1000_device->base.
+							slist);
+			if (dio)
+				dio->base.
+				    me_subdevice_destructor((me_subdevice_t *)
+							    dio);
+
+			dio =
+			    (me1000_dio_subdevice_t *)
+			    me_slist_del_subdevice_tail(&me1000_device->base.
+							slist);
+			if (dio)
+				dio->base.
+				    me_subdevice_destructor((me_subdevice_t *)
+							    dio);
+		}
+	} else if (config->count == 4) {
+		//Add 2 subdevices
+		if (me_slist_get_number_subdevices(&me1000_device->base.slist)
+		    == 2) {
+			dio =
+			    me1000_dio_constructor(me1000_device->base.info.pci.
+						   reg_bases[2], 2,
+						   &me1000_device->ctrl_lock);
+			if (!dio) {
+				PERROR("Cannot create dio subdevice.\n");
+				return ME_ERRNO_INTERNAL;
+			}
+			me_slist_add_subdevice_tail(&me1000_device->base.slist,
+						    (me_subdevice_t *) dio);
+
+			dio =
+			    me1000_dio_constructor(me1000_device->base.info.pci.
+						   reg_bases[2], 3,
+						   &me1000_device->ctrl_lock);
+			if (!dio) {
+				dio =
+				    (me1000_dio_subdevice_t *)
+				    me_slist_del_subdevice_tail(&me1000_device->
+								base.slist);
+				if (dio)
+					dio->base.
+					    me_subdevice_destructor((me_subdevice_t *) dio);
+
+				PERROR("Cannot create dio subdevice.\n");
+				return ME_ERRNO_INTERNAL;
+			}
+			me_slist_add_subdevice_tail(&me1000_device->base.slist,
+						    (me_subdevice_t *) dio);
+		} else {
+			// Nothing to do.
+		}
+	} else {
+		PERROR("Invalid configuration.\n");
+		return ME_ERRNO_INTERNAL;
+	}
+
+	return ME_ERRNO_SUCCESS;
+}
+
+me_device_t *me1000_pci_constructor(struct pci_dev * pci_device)
+{
+	me1000_device_t *me1000_device;
+	me_subdevice_t *subdevice;
+	int err;
+	int i;
+
+	PDEBUG("executed.\n");
+
+	// Allocate structure for device instance.
+	me1000_device = kmalloc(sizeof(me1000_device_t), GFP_KERNEL);
+
+	if (!me1000_device) {
+		PERROR("Cannot get memory for ME-1000 device instance.\n");
+		return NULL;
+	}
+
+	memset(me1000_device, 0, sizeof(me1000_device_t));
+
+	// Initialize base class structure.
+	err = me_device_pci_init((me_device_t *) me1000_device, pci_device);
+
+	if (err) {
+		kfree(me1000_device);
+		PERROR("Cannot initialize device base class.\n");
+		return NULL;
+	}
+	// Initialize spin lock .
+	spin_lock_init(&me1000_device->ctrl_lock);
+
+	for (i = 0; i < 4; i++) {
+		subdevice =
+		    (me_subdevice_t *) me1000_dio_constructor(me1000_device->
+							      base.info.pci.
+							      reg_bases[2], i,
+							      &me1000_device->
+							      ctrl_lock);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me1000_device);
+			kfree(me1000_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me1000_device->base.slist,
+					    subdevice);
+	}
+
+	// Overwrite base class methods.
+	me1000_device->base.me_device_config_load = me1000_config_load;
+
+	return (me_device_t *) me1000_device;
+}
+
+// Init and exit of module.
+static int __init me1000_init(void)
+{
+	PDEBUG("executed.\n");
+	return 0;
+}
+
+static void __exit me1000_exit(void)
+{
+	PDEBUG("executed.\n");
+}
+
+module_init(me1000_init);
+module_exit(me1000_exit);
+
+// Administrative stuff for modinfo.
+MODULE_AUTHOR
+    ("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
+MODULE_DESCRIPTION("Device Driver Module for Meilhaus ME-1000 Devices");
+MODULE_SUPPORTED_DEVICE("Meilhaus ME-1000 Digital I/O Devices");
+MODULE_LICENSE("GPL");
+
+// Export the constructor.
+EXPORT_SYMBOL(me1000_pci_constructor);

drivers/staging/meilhaus/me1000_device.h

+/**
+ * @file me1000_device.h
+ *
+ * @brief ME-1000 device class instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME1000_H_
+#define _ME1000_H_
+
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+
+#include "medevice.h"
+
+#ifdef __KERNEL__
+
+#define ME1000_MAGIC_NUMBER	1000
+
+/**
+ * @brief The ME-1000 device class structure.
+ */
+typedef struct me1000_device {
+	me_device_t base;		/**< The Meilhaus device base class. */
+	spinlock_t ctrl_lock;		/**< Guards the DIO mode register. */
+} me1000_device_t;
+
+/**
+ * @brief The ME-1000 device class constructor.
+ *
+ * @param pci_device The pci device structure given by the PCI subsystem.
+ *
+ * @return On succes a new ME-1000 device instance. \n
+ *         NULL on error.
+ */
+me_device_t *me1000_pci_constructor(struct pci_dev *pci_device)
+    __attribute__ ((weak));
+
+#endif
+#endif

drivers/staging/meilhaus/me1000_dio.c

+/**
+ * @file me1000_dio.c
+ *
+ * @brief ME-1000 DIO subdevice instance.
+ * @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+#include "medebug.h"
+
+#include "me1000_dio_reg.h"
+#include "me1000_dio.h"
+
+/*
+ * Defines
+ */
+#define ME1000_DIO_MAGIC_NUMBER	0x1000	/**< The magic number of the class structure. */
+
+/*
+ * Functions
+ */
+
+static int me1000_dio_io_reset_subdevice(struct me_subdevice *subdevice,
+					 struct file *filep, int flags)
+{
+	me1000_dio_subdevice_t *instance;
+	uint32_t tmp;
+
+	PDEBUG("executed.\n");
+
+	instance = (me1000_dio_subdevice_t *) subdevice;
+
+	if (flags) {
+		PERROR("Invalid flag specified.\n");
+		return ME_ERRNO_INVALID_FLAGS;
+	}
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->ctrl_reg_lock);
+	tmp = inl(instance->ctrl_reg);
+	tmp &= ~(0x1 << instance->dio_idx);
+	outl(tmp, instance->ctrl_reg);
+	PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
+		   instance->ctrl_reg - instance->reg_base, tmp);
+	spin_unlock(instance->ctrl_reg_lock);
+
+	outl(0x00000000, instance->port_reg);
+	PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
+		   instance->ctrl_reg - instance->reg_base, 0);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me1000_dio_io_single_config(struct me_subdevice *subdevice,
+				       struct file *filep,
+				       int channel,
+				       int single_config,
+				       int ref,
+				       int trig_chan,
+				       int trig_type, int trig_edge, int flags)
+{
+	me1000_dio_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	int ctrl;
+	int size =
+	    flags & (ME_IO_SINGLE_CONFIG_DIO_BIT | ME_IO_SINGLE_CONFIG_DIO_BYTE
+		     | ME_IO_SINGLE_CONFIG_DIO_WORD |
+		     ME_IO_SINGLE_CONFIG_DIO_DWORD);
+
+	PDEBUG("executed.\n");
+
+	instance = (me1000_dio_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->ctrl_reg_lock);
+	ctrl = inl(instance->ctrl_reg);
+
+	switch (size) {
+	case ME_IO_SINGLE_CONFIG_NO_FLAGS:
+	case ME_IO_SINGLE_CONFIG_DIO_DWORD:
+		if (channel == 0) {
+			if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) {
+				ctrl &= ~(0x1 << instance->dio_idx);
+			} else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
+				ctrl |= 0x1 << instance->dio_idx;
+			} else {
+				PERROR("Invalid port direction.\n");
+				err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+			}
+		} else {
+			PERROR("Invalid channel number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+
+	if (!err) {
+		outl(ctrl, instance->ctrl_reg);
+		PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
+			   instance->reg_base,
+			   instance->ctrl_reg - instance->reg_base, ctrl);
+	}
+	spin_unlock(instance->ctrl_reg_lock);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me1000_dio_io_single_read(struct me_subdevice *subdevice,
+				     struct file *filep,
+				     int channel,
+				     int *value, int time_out, int flags)
+{
+	me1000_dio_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+
+	PDEBUG("executed.\n");
+
+	instance = (me1000_dio_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER;
+
+	spin_lock(&instance->subdevice_lock);
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 32)) {
+			*value = inl(instance->port_reg) & (0x1 << channel);
+		} else {
+			PERROR("Invalid bit number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if ((channel >= 0) && (channel < 4)) {
+			*value =
+			    (inl(instance->port_reg) >> (channel * 8)) & 0xFF;
+		} else {
+			PERROR("Invalid byte number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_TYPE_DIO_WORD:
+		if ((channel >= 0) && (channel < 2)) {
+			*value =
+			    (inl(instance->port_reg) >> (channel * 16)) &
+			    0xFFFF;
+		} else {
+			PERROR("Invalid word number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_DWORD:
+		if (channel == 0) {
+			*value = inl(instance->port_reg);
+		} else {
+			PERROR("Invalid dword number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me1000_dio_io_single_write(struct me_subdevice *subdevice,
+				      struct file *filep,
+				      int channel,
+				      int value, int time_out, int flags)
+{
+	me1000_dio_subdevice_t *instance;
+	int err = ME_ERRNO_SUCCESS;
+	uint32_t config;
+	uint32_t state;
+
+	PDEBUG("executed.\n");
+
+	instance = (me1000_dio_subdevice_t *) subdevice;
+
+	ME_SUBDEVICE_ENTER spin_lock(&instance->subdevice_lock);
+	spin_lock(instance->ctrl_reg_lock);
+	config = inl(instance->ctrl_reg) & (0x1 << instance->dio_idx);
+	switch (flags) {
+	case ME_IO_SINGLE_TYPE_DIO_BIT:
+		if ((channel >= 0) && (channel < 32)) {
+			if (config) {
+				state = inl(instance->port_reg);
+				state =
+				    value ? (state | (0x1 << channel)) : (state
+									  &
+									  ~(0x1
+									    <<
+									    channel));
+				outl(state, instance->port_reg);
+				PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n",
+					   instance->reg_base,
+					   instance->port_reg -
+					   instance->reg_base, state);
+			} else {
+				PERROR("Port is not in output mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid bit number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_TYPE_DIO_BYTE:
+		if ((channel >= 0) && (channel < 4)) {
+			if (config) {
+				state = inl(instance->port_reg);
+				state &= ~(0xFF << (channel * 8));
+				state |= (value & 0xFF) << (channel * 8);
+				outl(state, instance->port_reg);
+				PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n",
+					   instance->reg_base,
+					   instance->port_reg -
+					   instance->reg_base, state);
+			} else {
+				PERROR("Port is not in output mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid byte number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_TYPE_DIO_WORD:
+		if ((channel >= 0) && (channel < 2)) {
+			if (config) {
+				state = inl(instance->port_reg);
+				state &= ~(0xFFFF << (channel * 16));
+				state |= (value & 0xFFFF) << (channel * 16);
+				outl(state, instance->port_reg);
+				PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n",
+					   instance->reg_base,
+					   instance->port_reg -
+					   instance->reg_base, state);
+			} else {
+				PERROR("Port is not in output mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid word number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	case ME_IO_SINGLE_NO_FLAGS:
+	case ME_IO_SINGLE_TYPE_DIO_DWORD:
+		if (channel == 0) {
+			if (config) {
+				outl(value, instance->port_reg);
+				PDEBUG_REG("port_reg outl(0x%lX+0x%lX)=0x%x\n",
+					   instance->reg_base,
+					   instance->port_reg -
+					   instance->reg_base, value);
+			} else {
+				PERROR("Port is not in output mode.\n");
+				err = ME_ERRNO_PREVIOUS_CONFIG;
+			}
+		} else {
+			PERROR("Invalid dword number.\n");
+			err = ME_ERRNO_INVALID_CHANNEL;
+		}
+		break;
+
+	default:
+		PERROR("Invalid flags specified.\n");
+		err = ME_ERRNO_INVALID_FLAGS;
+	}
+	spin_unlock(instance->ctrl_reg_lock);
+	spin_unlock(&instance->subdevice_lock);
+
+	ME_SUBDEVICE_EXIT;
+
+	return err;
+}
+
+static int me1000_dio_query_number_channels(struct me_subdevice *subdevice,
+					    int *number)
+{
+	PDEBUG("executed.\n");
+	*number = ME1000_DIO_NUMBER_CHANNELS;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me1000_dio_query_subdevice_type(struct me_subdevice *subdevice,
+					   int *type, int *subtype)
+{
+	PDEBUG("executed.\n");
+	*type = ME_TYPE_DIO;
+	*subtype = ME_SUBTYPE_SINGLE;
+	return ME_ERRNO_SUCCESS;
+}
+
+static int me1000_dio_query_subdevice_caps(struct me_subdevice *subdevice,
+					   int *caps)
+{
+	me1000_dio_subdevice_t *instance;
+
+	PDEBUG("executed.\n");
+
+	instance = (me1000_dio_subdevice_t *) subdevice;
+
+	*caps = ME_CAPS_DIO_DIR_DWORD;
+
+	return ME_ERRNO_SUCCESS;
+}
+
+me1000_dio_subdevice_t *me1000_dio_constructor(uint32_t reg_base,
+					       unsigned int dio_idx,
+					       spinlock_t * ctrl_reg_lock)
+{
+	me1000_dio_subdevice_t *subdevice;
+	int err;
+
+	PDEBUG("executed.\n");
+
+	/* Allocate memory for subdevice instance */
+	subdevice = kmalloc(sizeof(me1000_dio_subdevice_t), GFP_KERNEL);
+
+	if (!subdevice) {
+		PERROR("Cannot get memory for ME-1000 DIO instance.\n");
+		return NULL;
+	}
+
+	memset(subdevice, 0, sizeof(me1000_dio_subdevice_t));
+
+	/* Check if counter index is out of range */
+
+	if (dio_idx >= ME1000_DIO_NUMBER_PORTS) {
+		PERROR("DIO index is out of range.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+
+	/* Initialize subdevice base class */
+	err = me_subdevice_init(&subdevice->base);
+
+	if (err) {
+		PERROR("Cannot initialize subdevice base class instance.\n");
+		kfree(subdevice);
+		return NULL;
+	}
+	// Initialize spin locks.
+	spin_lock_init(&subdevice->subdevice_lock);
+	subdevice->ctrl_reg_lock = ctrl_reg_lock;
+
+	/* Save the DIO index */
+	subdevice->dio_idx = dio_idx;
+
+	/* Initialize registers. */
+#ifdef MEDEBUG_DEBUG_REG
+	subdevice->reg_base = reg_base;
+#endif
+	subdevice->ctrl_reg = reg_base + ME1000_PORT_MODE;
+	subdevice->port_reg =
+	    reg_base + ME1000_PORT + (dio_idx * ME1000_PORT_STEP);
+
+	/* Override base class methods. */
+	subdevice->base.me_subdevice_io_reset_subdevice =
+	    me1000_dio_io_reset_subdevice;
+	subdevice->base.me_subdevice_io_single_config =
+	    me1000_dio_io_single_config;
+	subdevice->base.me_subdevice_io_single_read = me1000_dio_io_single_read;
+	subdevice->base.me_subdevice_io_single_write =
+	    me1000_dio_io_single_write;
+	subdevice->base.me_subdevice_query_number_channels =
+	    me1000_dio_query_number_channels;
+	subdevice->base.me_subdevice_query_subdevice_type =
+	    me1000_dio_query_subdevice_type;
+	subdevice->base.me_subdevice_query_subdevice_caps =
+	    me1000_dio_query_subdevice_caps;
+
+	return subdevice;
+}

drivers/staging/meilhaus/me1000_dio.h

+/**
+ * @file me1000_dio.h
+ *
+ * @brief Meilhaus ME-1000 digital i/o implementation.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME1000_DIO_H_
+#define _ME1000_DIO_H_
+
+#include "mesubdevice.h"
+#include "meslock.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The ME-1000 DIO subdevice class.
+ */
+typedef struct me1000_dio_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+//      uint32_t magic;                                 /**< The magic number unique for this structure. */
+
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+	spinlock_t *ctrl_reg_lock;		/**< Spin lock to protect #ctrl_reg and #ctrl_reg_mirror from concurrent access. */
+	int dio_idx;					/**< The index of the DIO port on the device. */
+
+	unsigned long port_reg;			/**< Register to read or write a value from or to the port respectively. */
+	unsigned long ctrl_reg;			/**< Register to configure the DIO modes. */
+#ifdef MEDEBUG_DEBUG_REG
+	unsigned long reg_base;
+#endif
+} me1000_dio_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-1000 DIO instance.
+ *
+ * @param reg_base The register base address of the device as returned by the PCI BIOS.
+ * @param dio_idx The index of the DIO on the device.
+ * @param ctrl_reg_lock Pointer to spin lock protecting the control register and from concurrent access.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me1000_dio_subdevice_t *me1000_dio_constructor(uint32_t reg_base,
+					       unsigned int dio_idx,
+					       spinlock_t * ctrl_reg_lock);
+
+#endif
+#endif

drivers/staging/meilhaus/me1000_dio_reg.h

+/**
+ * @file me1000_dio_reg.h
+ *
+ * @brief ME-1000 digital i/o register definitions.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME1000_DIO_REG_H_
+# define _ME1000_DIO_REG_H_
+
+# ifdef __KERNEL__
+
+# define ME1000_DIO_NUMBER_CHANNELS	32				/**< The number of channels per DIO port. */
+# define ME1000_DIO_NUMBER_PORTS	4				/**< The number of ports per ME-1000. */
+
+// # define ME1000_PORT_A                               0x0000                  /**< Port A base register offset. */
+// # define ME1000_PORT_B                               0x0004                  /**< Port B base register offset. */
+// # define ME1000_PORT_C                               0x0008                  /**< Port C base register offset. */
+// # define ME1000_PORT_D                               0x000C                  /**< Port D base register offset. */
+# define ME1000_PORT				0x0000			/**< Base for port's register. */
+# define ME1000_PORT_STEP			4				/**< Distance between port's register. */
+
+# define ME1000_PORT_MODE			0x0010			/**< Configuration register to switch the port direction. */
+// # define ME1000_PORT_MODE_OUTPUT_A   (1 << 0)                /**< If set, port A is in output, otherwise in input mode. */
+// # define ME1000_PORT_MODE_OUTPUT_B   (1 << 1)                /**< If set, port B is in output, otherwise in input mode. */
+// # define ME1000_PORT_MODE_OUTPUT_C   (1 << 2)                /**< If set, port C is in output, otherwise in input mode. */
+// # define ME1000_PORT_MODE_OUTPUT_D   (1 << 3)                /**< If set, port D is in output, otherwise in input mode. */
+
+# endif	//__KERNEL__
+#endif //_ME1000_DIO_REG_H_

drivers/staging/meilhaus/me1400_device.c

+/**
+ * @file me1400_device.c
+ *
+ * @brief ME-1400 device instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ * @author Krzysztof Gantzke	(k.gantzke@meilhaus.de)
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+/*
+ * User application could also include the kernel header files. But the
+ * real kernel functions are protected by #ifdef __KERNEL__.
+ */
+#ifndef __KERNEL__
+#  define __KERNEL__
+#endif
+
+/*
+ * This must be defined before module.h is included. Not needed, when
+ * it is a built in driver.
+ */
+#ifndef MODULE
+#  define MODULE
+#endif
+
+#include <linux/module.h>
+
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/version.h>
+
+#include "meids.h"
+#include "meerror.h"
+#include "mecommon.h"
+#include "meinternal.h"
+
+#include "medebug.h"
+
+#include "me1400_device.h"
+#include "me8254.h"
+#include "me8254_reg.h"
+#include "me8255.h"
+#include "me1400_ext_irq.h"
+
+me_device_t *me1400_pci_constructor(struct pci_dev *pci_device)
+{
+	int err;
+	me1400_device_t *me1400_device;
+	me_subdevice_t *subdevice;
+	unsigned int version_idx;
+	unsigned int me8255_idx;
+	unsigned int dio_idx;
+	unsigned int me8254_idx;
+	unsigned int ctr_idx;
+	unsigned int ext_irq_idx;
+
+	PDEBUG("executed.\n");
+
+	// Allocate structure for device instance.
+	me1400_device = kmalloc(sizeof(me1400_device_t), GFP_KERNEL);
+
+	if (!me1400_device) {
+		PERROR("Cannot get memory for 1400ate device instance.\n");
+		return NULL;
+	}
+
+	memset(me1400_device, 0, sizeof(me1400_device_t));
+
+	// Initialize base class structure.
+	err = me_device_pci_init((me_device_t *) me1400_device, pci_device);
+
+	if (err) {
+		kfree(me1400_device);
+		PERROR("Cannot initialize device base class.\n");
+		return NULL;
+	}
+
+	/* Check for ME1400 extension device. If detected we fake a ME-1400 D device id. */
+	if (me1400_device->base.info.pci.device_id ==
+	    PCI_DEVICE_ID_MEILHAUS_ME140C) {
+		uint8_t ctrl;
+		ctrl =
+		    inb(me1400_device->base.info.pci.reg_bases[2] +
+			ME1400D_CLK_SRC_2_REG);
+		PDEBUG_REG("xxx_reg inb(0x%X+0x%X)=0x%x\n",
+			   me1400_device->base.info.pci.reg_bases[2],
+			   ME1400D_CLK_SRC_2_REG, ctrl);
+		outb(ctrl | 0xF0,
+		     me1400_device->base.info.pci.reg_bases[2] +
+		     ME1400D_CLK_SRC_2_REG);
+		PDEBUG_REG("xxx_reg outb(0x%X+0x%X)=0x%x\n",
+			   me1400_device->base.info.pci.reg_bases[2],
+			   ME1400D_CLK_SRC_2_REG, ctrl | 0xF0);
+		ctrl =
+		    inb(me1400_device->base.info.pci.reg_bases[2] +
+			ME1400D_CLK_SRC_2_REG);
+		PDEBUG_REG("xxx_reg inb(0x%X+0x%X)=0x%x\n",
+			   me1400_device->base.info.pci.reg_bases[2],
+			   ME1400D_CLK_SRC_2_REG, ctrl);
+
+		if ((ctrl & 0xF0) == 0xF0) {
+			PINFO("ME1400 D detected.\n");
+			me1400_device->base.info.pci.device_id =
+			    PCI_DEVICE_ID_MEILHAUS_ME140D;
+		}
+	}
+
+	/* Initialize global stuff of digital i/o subdevices. */
+	for (me8255_idx = 0; me8255_idx < ME1400_MAX_8255; me8255_idx++) {
+		me1400_device->dio_current_mode[me8255_idx] = 0;
+		spin_lock_init(&me1400_device->dio_ctrl_reg_lock[me8255_idx]);
+	}
+
+	/* Initialize global stuff of counter subdevices. */
+	spin_lock_init(&me1400_device->clk_src_reg_lock);
+
+	for (me8254_idx = 0; me8254_idx < ME1400_MAX_8254; me8254_idx++)
+		spin_lock_init(&me1400_device->ctr_ctrl_reg_lock[me8254_idx]);
+
+	/* Get the index in the device version information table. */
+	version_idx =
+	    me1400_versions_get_device_index(me1400_device->base.info.pci.
+					     device_id);
+
+	/* Generate DIO subdevice instances. */
+	for (me8255_idx = 0;
+	     me8255_idx < me1400_versions[version_idx].dio_chips;
+	     me8255_idx++) {
+		for (dio_idx = 0; dio_idx < 3; dio_idx++) {
+			subdevice =
+			    (me_subdevice_t *)
+			    me8255_constructor(me1400_versions[version_idx].
+					       device_id,
+					       me1400_device->base.info.pci.
+					       reg_bases[2], me8255_idx,
+					       dio_idx,
+					       &me1400_device->
+					       dio_current_mode[me8255_idx],
+					       &me1400_device->
+					       dio_ctrl_reg_lock[me8255_idx]);
+
+			if (!subdevice) {
+				me_device_deinit((me_device_t *) me1400_device);
+				kfree(me1400_device);
+				PERROR("Cannot get memory for subdevice.\n");
+				return NULL;
+			}
+
+			me_slist_add_subdevice_tail(&me1400_device->base.slist,
+						    subdevice);
+		}
+	}
+
+	/* Generate counter subdevice instances. */
+	for (me8254_idx = 0;
+	     me8254_idx < me1400_versions[version_idx].ctr_chips;
+	     me8254_idx++) {
+		for (ctr_idx = 0; ctr_idx < 3; ctr_idx++) {
+			subdevice =
+			    (me_subdevice_t *)
+			    me8254_constructor(me1400_device->base.info.pci.
+					       device_id,
+					       me1400_device->base.info.pci.
+					       reg_bases[2], me8254_idx,
+					       ctr_idx,
+					       &me1400_device->
+					       ctr_ctrl_reg_lock[me8254_idx],
+					       &me1400_device->
+					       clk_src_reg_lock);
+
+			if (!subdevice) {
+				me_device_deinit((me_device_t *) me1400_device);
+				kfree(me1400_device);
+				PERROR("Cannot get memory for subdevice.\n");
+				return NULL;
+			}
+
+			me_slist_add_subdevice_tail(&me1400_device->base.slist,
+						    subdevice);
+		}
+	}
+
+	/* Generate external interrupt subdevice instances. */
+	for (ext_irq_idx = 0;
+	     ext_irq_idx < me1400_versions[version_idx].ext_irq_subdevices;
+	     ext_irq_idx++) {
+		subdevice =
+		    (me_subdevice_t *)
+		    me1400_ext_irq_constructor(me1400_device->base.info.pci.
+					       device_id,
+					       me1400_device->base.info.pci.
+					       reg_bases[1],
+					       me1400_device->base.info.pci.
+					       reg_bases[2],
+					       &me1400_device->clk_src_reg_lock,
+					       me1400_device->base.irq);
+
+		if (!subdevice) {
+			me_device_deinit((me_device_t *) me1400_device);
+			kfree(me1400_device);
+			PERROR("Cannot get memory for subdevice.\n");
+			return NULL;
+		}
+
+		me_slist_add_subdevice_tail(&me1400_device->base.slist,
+					    subdevice);
+	}
+
+	return (me_device_t *) me1400_device;
+}
+
+// Init and exit of module.
+
+static int __init me1400_init(void)
+{
+	PDEBUG("executed.\n");
+	return 0;
+}
+
+static void __exit me1400_exit(void)
+{
+	PDEBUG("executed.\n");
+}
+
+module_init(me1400_init);
+module_exit(me1400_exit);
+
+// Administrative stuff for modinfo.
+MODULE_AUTHOR
+    ("Guenter Gebhardt <g.gebhardt@meilhaus.de> & Krzysztof Gantzke <k.gantzke@meilhaus.de>");
+MODULE_DESCRIPTION("Device Driver Module for Meilhaus ME-14xx devices");
+MODULE_SUPPORTED_DEVICE("Meilhaus ME-14xx MIO devices");
+MODULE_LICENSE("GPL");
+
+// Export the constructor.
+EXPORT_SYMBOL(me1400_pci_constructor);

drivers/staging/meilhaus/me1400_device.h

+/**
+ * @file me1400_device.c
+ *
+ * @brief ME-1400 device family instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ */
+
+#ifndef _ME1400_DEVICE_H_
+#define _ME1400_DEVICE_H_
+
+#include "metypes.h"
+#include "medefines.h"
+#include "meinternal.h"
+
+#include "medevice.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief Structure to store device capabilities.
+ */
+typedef struct me1400_version {
+	uint16_t device_id;					/**< The PCI device id of the device. */
+	unsigned int dio_chips;				/**< The number of 8255 chips on the device. */
+	unsigned int ctr_chips;				/**< The number of 8254 chips on the device. */
+	unsigned int ext_irq_subdevices;	/**< The number of external interrupt inputs on the device. */
+} me1400_version_t;
+
+/**
+  * @brief Defines for each ME-1400 device version its capabilities.
+ */
+static me1400_version_t me1400_versions[] = {
+	{PCI_DEVICE_ID_MEILHAUS_ME1400, 1, 0, 0},
+	{PCI_DEVICE_ID_MEILHAUS_ME140A, 1, 1, 1},
+	{PCI_DEVICE_ID_MEILHAUS_ME140B, 2, 2, 1},
+	{PCI_DEVICE_ID_MEILHAUS_ME14E0, 1, 0, 0},
+	{PCI_DEVICE_ID_MEILHAUS_ME14EA, 1, 1, 1},
+	{PCI_DEVICE_ID_MEILHAUS_ME14EB, 2, 2, 1},
+	{PCI_DEVICE_ID_MEILHAUS_ME140C, 1, 5, 1},
+	{PCI_DEVICE_ID_MEILHAUS_ME140D, 2, 10, 1},
+	{0}
+};
+
+#define ME1400_DEVICE_VERSIONS (sizeof(me1400_versions) / sizeof(me1400_version_t) - 1)	/**< Returns the number of entries in #me1400_versions. */
+
+/**
+ * @brief Returns the index of the device entry in #me1400_versions.
+ *
+ * @param device_id The PCI device id of the device to query.
+ * @return The index of the device in #me1400_versions.
+ */
+static inline unsigned int me1400_versions_get_device_index(uint16_t device_id)
+{
+	unsigned int i;
+	for (i = 0; i < ME1400_DEVICE_VERSIONS; i++)
+		if (me1400_versions[i].device_id == device_id)
+			break;
+	return i;
+}
+
+#define ME1400_MAX_8254		10	/**< The maximum number of 8254 counter subdevices available on any ME-1400 device. */
+#define ME1400_MAX_8255		2	/**< The maximum number of 8255 digital i/o subdevices available on any ME-1400 device. */
+
+/**
+ * @brief The ME-1400 device class.
+ */
+typedef struct me1400_device {
+	me_device_t base;									/**< The Meilhaus device base class. */
+
+	spinlock_t clk_src_reg_lock;						/**< Guards the 8254 clock source registers. */
+	spinlock_t ctr_ctrl_reg_lock[ME1400_MAX_8254];		/**< Guards the 8254 ctrl registers. */
+
+	int dio_current_mode[ME1400_MAX_8255];				/**< Saves the current mode setting of a single 8255 DIO chip. */
+	spinlock_t dio_ctrl_reg_lock[ME1400_MAX_8255];		/**< Guards the 8255 ctrl register and #dio_current_mode. */
+} me1400_device_t;
+
+/**
+ * @brief The ME-1400 device class constructor.
+ *
+ * @param pci_device The pci device structure given by the PCI subsystem.
+ *
+ * @return On succes a new ME-1400 device instance. \n
+ *         NULL on error.
+ */
+me_device_t *me1400_pci_constructor(struct pci_dev *pci_device)
+    __attribute__ ((weak));
+
+#endif
+#endif

drivers/staging/meilhaus/me1400_ext_irq.h

+/**
+ * @file me1400_ext_irq.h
+ *
+ * @brief ME-1400 external interrupt implementation.
+ * @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+#ifndef _ME1400_EXT_IRQ_H_
+#define _ME1400_EXT_IRQ_H_
+
+#include <linux/sched.h>
+
+#include "mesubdevice.h"
+#include "meslock.h"
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The ME-1400 external interrupt subdevice class.
+ */
+typedef struct me1400_ext_irq_subdevice {
+	/* Inheritance */
+	me_subdevice_t base;			/**< The subdevice base class. */
+
+	/* Attributes */
+	spinlock_t subdevice_lock;		/**< Spin lock to protect the subdevice from concurrent access. */
+	spinlock_t *clk_src_reg_lock;	/**< Lock protecting the clock control register. */
+
+	wait_queue_head_t wait_queue;	/**< Queue to put on threads waiting for an interrupt. */
+
+	uint32_t device_id;				/**< The device id of the device holding the subdevice. */
+	int irq;						/**< The irq number assigned by PCI BIOS. */
+	int rised;						/**< If true an interrupt has occured. */
+	unsigned int n;					/**< The number of interrupt since the driver was loaded. */
+
+	unsigned long plx_intcs_reg;	/**< The PLX interrupt control and status register. */
+	unsigned long ctrl_reg;			/**< The control register. */
+#ifdef MEDEBUG_DEBUG_REG
+	unsigned long reg_base;
+#endif
+} me1400_ext_irq_subdevice_t;
+
+/**
+ * @brief The constructor to generate a ME-1400 external interrupt instance.
+ *
+ * @param plx_reg_base The register base address of the PLX chip as returned by the PCI BIOS.
+ * @param me1400_reg_base The register base address of the ME-1400 device as returned by the PCI BIOS.
+ * @param irq The irq assigned by the PCI BIOS.
+ *
+ * @return Pointer to new instance on success.\n
+ * NULL on error.
+ */
+me1400_ext_irq_subdevice_t *me1400_ext_irq_constructor(uint32_t device_id,
+						       uint32_t plx_reg_base,
+						       uint32_t me1400_reg_base,
+						       spinlock_t *
+						       clk_src_reg_lock,
+						       int irq);
+
+#endif
+#endif