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/**
* @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
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