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/*
* linux/arch/arm/mach-nuc93x/irq.c
*
* Copyright (c) 2008 Nuvoton technology corporation.
*
* Wan ZongShun <mcuos.com@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation;version 2 of the License.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/ptrace.h>
#include <linux/sysdev.h>
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <mach/hardware.h>
#include <mach/regs-irq.h>
static void nuc93x_irq_mask(unsigned int irq)
{
__raw_writel(1 << irq, REG_AIC_MDCR);
}
/*
* By the w90p910 spec,any irq,only write 1
* to REG_AIC_EOSCR for ACK
*/
static void nuc93x_irq_ack(unsigned int irq)
{
__raw_writel(0x01, REG_AIC_EOSCR);
}
static void nuc93x_irq_unmask(unsigned int irq)
{
__raw_writel(1 << irq, REG_AIC_MECR);
}
static struct irq_chip nuc93x_irq_chip = {
.ack = nuc93x_irq_ack,
.mask = nuc93x_irq_mask,
.unmask = nuc93x_irq_unmask,
};
void __init nuc93x_init_irq(void)
{
int irqno;
__raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
for (irqno = IRQ_WDT; irqno <= NR_IRQS; irqno++) {
set_irq_chip(irqno, &nuc93x_irq_chip);
set_irq_handler(irqno, handle_level_irq);
set_irq_flags(irqno, IRQF_VALID);
}
}
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