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/*
* linux/arch/arm/mach-ebsa110/irq.c
*
* Copyright (C) 1996-1998 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Changelog:
* 22-08-1998 RMK Restructured IRQ routines
*/
#include <linux/init.h>
#include <asm/mach/irq.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include "hardware.h"
static void ebsa110_mask_irq(unsigned int irq)
{
__raw_writeb(1 << irq, IRQ_MCLR);
}
static void ebsa110_unmask_irq(unsigned int irq)
{
__raw_writeb(1 << irq, IRQ_MSET);
}
void __init ebsa110_init_irq(void)
{
unsigned long flags;
int irq;
save_flags_cli (flags);
__raw_writeb(0xff, IRQ_MCLR);
__raw_writeb(0x55, IRQ_MSET);
__raw_writeb(0x00, IRQ_MSET);
if (__raw_readb(IRQ_MASK) != 0x55)
while (1);
__raw_writeb(0xff, IRQ_MCLR); /* clear all interrupt enables */
restore_flags (flags);
for (irq = 0; irq < NR_IRQS; irq++) {
irq_desc[irq].valid = 1;
irq_desc[irq].probe_ok = 1;
irq_desc[irq].mask_ack = ebsa110_mask_irq;
irq_desc[irq].mask = ebsa110_mask_irq;
irq_desc[irq].unmask = ebsa110_unmask_irq;
}
}
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