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92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/* arch/arm/mach-lh7a40x/irq-lh7a400.c
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*
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* Copyright (C) 2004 Coastal Environmental Systems
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/mach/irq.h>
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#include <mach/irqs.h>
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#include "common.h"
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/* CPU IRQ handling */
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static void lh7a400_mask_irq(struct irq_data *d)
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{
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INTC_INTENC = (1 << d->irq);
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}
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static void lh7a400_unmask_irq(struct irq_data *d)
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{
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INTC_INTENS = (1 << d->irq);
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}
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static void lh7a400_ack_gpio_irq(struct irq_data *d)
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{
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GPIO_GPIOFEOI = (1 << IRQ_TO_GPIO (d->irq));
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INTC_INTENC = (1 << d->irq);
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}
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static struct irq_chip lh7a400_internal_chip = {
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.name = "MPU",
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.irq_ack = lh7a400_mask_irq, /* Level triggering -> mask is ack */
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.irq_mask = lh7a400_mask_irq,
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.irq_unmask = lh7a400_unmask_irq,
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};
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static struct irq_chip lh7a400_gpio_chip = {
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.name = "GPIO",
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.irq_ack = lh7a400_ack_gpio_irq,
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.irq_mask = lh7a400_mask_irq,
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.irq_unmask = lh7a400_unmask_irq,
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};
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/* IRQ initialization */
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void __init lh7a400_init_irq (void)
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{
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int irq;
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INTC_INTENC = 0xffffffff; /* Disable all interrupts */
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GPIO_GPIOFINTEN = 0x00; /* Disable all GPIOF interrupts */
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barrier ();
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for (irq = 0; irq < NR_IRQS; ++irq) {
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switch (irq) {
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case IRQ_GPIO0INTR:
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case IRQ_GPIO1INTR:
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case IRQ_GPIO2INTR:
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case IRQ_GPIO3INTR:
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case IRQ_GPIO4INTR:
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case IRQ_GPIO5INTR:
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case IRQ_GPIO6INTR:
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case IRQ_GPIO7INTR:
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set_irq_chip (irq, &lh7a400_gpio_chip);
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set_irq_handler (irq, handle_level_irq); /* OK default */
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break;
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default:
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set_irq_chip (irq, &lh7a400_internal_chip);
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set_irq_handler (irq, handle_level_irq);
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}
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set_irq_flags (irq, IRQF_VALID);
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}
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lh7a40x_init_board_irq ();
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/* *** FIXME: the LH7a400 does use FIQ interrupts in some cases. For
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the time being, these are not initialized. */
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/* init_FIQ(); */
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}
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