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/**
* @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
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