92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/* 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 (u32 irq)
|
|
{
|
|
INTC_INTENC = (1 << irq);
|
|
}
|
|
|
|
static void lh7a400_unmask_irq (u32 irq)
|
|
{
|
|
INTC_INTENS = (1 << irq);
|
|
}
|
|
|
|
static void lh7a400_ack_gpio_irq (u32 irq)
|
|
{
|
|
GPIO_GPIOFEOI = (1 << IRQ_TO_GPIO (irq));
|
|
INTC_INTENC = (1 << irq);
|
|
}
|
|
|
|
static struct irq_chip lh7a400_internal_chip = {
|
|
.name = "MPU",
|
|
.ack = lh7a400_mask_irq, /* Level triggering -> mask is ack */
|
|
.mask = lh7a400_mask_irq,
|
|
.unmask = lh7a400_unmask_irq,
|
|
};
|
|
|
|
static struct irq_chip lh7a400_gpio_chip = {
|
|
.name = "GPIO",
|
|
.ack = lh7a400_ack_gpio_irq,
|
|
.mask = lh7a400_mask_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(); */
|
|
}
|