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/* arch/arm/mach-lh7a40x/irq-lh7a400.c
*
* Copyright (C) 2004 Coastal Environmental Systems
*
* 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.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <mach/irqs.h>
#include "common.h"
/* CPU IRQ handling */
static void lh7a400_mask_irq(struct irq_data *d)
{
INTC_INTENC = (1 << d->irq);
}
static void lh7a400_unmask_irq(struct irq_data *d)
{
INTC_INTENS = (1 << d->irq);
}
static void lh7a400_ack_gpio_irq(struct irq_data *d)
{
GPIO_GPIOFEOI = (1 << IRQ_TO_GPIO (d->irq));
INTC_INTENC = (1 << d->irq);
}
static struct irq_chip lh7a400_internal_chip = {
.name = "MPU",
.irq_ack = lh7a400_mask_irq, /* Level triggering -> mask is ack */
.irq_mask = lh7a400_mask_irq,
.irq_unmask = lh7a400_unmask_irq,
};
static struct irq_chip lh7a400_gpio_chip = {
.name = "GPIO",
.irq_ack = lh7a400_ack_gpio_irq,
.irq_mask = lh7a400_mask_irq,
.irq_unmask = lh7a400_unmask_irq,
};
/* IRQ initialization */
void __init lh7a400_init_irq (void)
{
int irq;
INTC_INTENC = 0xffffffff; /* Disable all interrupts */
GPIO_GPIOFINTEN = 0x00; /* Disable all GPIOF interrupts */
barrier ();
for (irq = 0; irq < NR_IRQS; ++irq) {
switch (irq) {
case IRQ_GPIO0INTR:
case IRQ_GPIO1INTR:
case IRQ_GPIO2INTR:
case IRQ_GPIO3INTR:
case IRQ_GPIO4INTR:
case IRQ_GPIO5INTR:
case IRQ_GPIO6INTR:
case IRQ_GPIO7INTR:
set_irq_chip (irq, &lh7a400_gpio_chip);
set_irq_handler (irq, handle_level_irq); /* OK default */
break;
default:
set_irq_chip (irq, &lh7a400_internal_chip);
set_irq_handler (irq, handle_level_irq);
}
set_irq_flags (irq, IRQF_VALID);
}
lh7a40x_init_board_irq ();
/* *** FIXME: the LH7a400 does use FIQ interrupts in some cases. For
the time being, these are not initialized. */
/* init_FIQ(); */
}
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