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/*
* linux/arch/arm/mach-w90x900/irq.c
*
* based on linux/arch/arm/plat-s3c24xx/irq.c by Ben Dooks
*
* Copyright (c) 2008 Nuvoton technology corporation
* All rights reserved.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
*/
#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 w90x900_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 w90x900_irq_ack(unsigned int irq)
{
__raw_writel(0x01, REG_AIC_EOSCR);
}
static void w90x900_irq_unmask(unsigned int irq)
{
unsigned long mask;
if (irq == IRQ_T_INT_GROUP) {
mask = __raw_readl(REG_AIC_GEN);
__raw_writel(TIME_GROUP_IRQ | mask, REG_AIC_GEN);
__raw_writel(1 << IRQ_T_INT_GROUP, REG_AIC_MECR);
}
__raw_writel(1 << irq, REG_AIC_MECR);
}
static struct irq_chip w90x900_irq_chip = {
.ack = w90x900_irq_ack,
.mask = w90x900_irq_mask,
.unmask = w90x900_irq_unmask,
};
void __init w90x900_init_irq(void)
{
int irqno;
__raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
for (irqno = IRQ_WDT; irqno <= IRQ_ADC; irqno++) {
set_irq_chip(irqno, &w90x900_irq_chip);
set_irq_handler(irqno, handle_level_irq);
set_irq_flags(irqno, IRQF_VALID);
}
}
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