1 /* arch/arm/mach-lh7a40x/irq-lh7a400.c
3 * Copyright (C) 2004 Coastal Environmental Systems
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * version 2 as published by the Free Software Foundation.
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/interrupt.h>
15 #include <mach/hardware.h>
17 #include <asm/mach/irq.h>
18 #include <mach/irqs.h>
22 /* CPU IRQ handling */
24 static void lh7a400_mask_irq (u32 irq)
26 INTC_INTENC = (1 << irq);
29 static void lh7a400_unmask_irq (u32 irq)
31 INTC_INTENS = (1 << irq);
34 static void lh7a400_ack_gpio_irq (u32 irq)
36 GPIO_GPIOFEOI = (1 << IRQ_TO_GPIO (irq));
37 INTC_INTENC = (1 << irq);
40 static struct irq_chip lh7a400_internal_chip = {
42 .ack = lh7a400_mask_irq, /* Level triggering -> mask is ack */
43 .mask = lh7a400_mask_irq,
44 .unmask = lh7a400_unmask_irq,
47 static struct irq_chip lh7a400_gpio_chip = {
49 .ack = lh7a400_ack_gpio_irq,
50 .mask = lh7a400_mask_irq,
51 .unmask = lh7a400_unmask_irq,
55 /* IRQ initialization */
57 void __init lh7a400_init_irq (void)
61 INTC_INTENC = 0xffffffff; /* Disable all interrupts */
62 GPIO_GPIOFINTEN = 0x00; /* Disable all GPIOF interrupts */
65 for (irq = 0; irq < NR_IRQS; ++irq) {
75 set_irq_chip (irq, &lh7a400_gpio_chip);
76 set_irq_handler (irq, handle_level_irq); /* OK default */
79 set_irq_chip (irq, &lh7a400_internal_chip);
80 set_irq_handler (irq, handle_level_irq);
82 set_irq_flags (irq, IRQF_VALID);
85 lh7a40x_init_board_irq ();
87 /* *** FIXME: the LH7a400 does use FIQ interrupts in some cases. For
88 the time being, these are not initialized. */