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>
14 #include <linux/ptrace.h>
16 #include <asm/hardware.h>
18 #include <asm/mach/irq.h>
19 #include <asm/arch/irqs.h>
23 /* CPU IRQ handling */
25 static void lh7a400_mask_irq (u32 irq)
27 INTC_INTENC = (1 << irq);
30 static void lh7a400_unmask_irq (u32 irq)
32 INTC_INTENS = (1 << irq);
35 static void lh7a400_ack_gpio_irq (u32 irq)
37 GPIO_GPIOFEOI = (1 << IRQ_TO_GPIO (irq));
38 INTC_INTENC = (1 << irq);
41 static struct irq_chip lh7a400_internal_chip = {
43 .ack = lh7a400_mask_irq, /* Level triggering -> mask is ack */
44 .mask = lh7a400_mask_irq,
45 .unmask = lh7a400_unmask_irq,
48 static struct irq_chip lh7a400_gpio_chip = {
50 .ack = lh7a400_ack_gpio_irq,
51 .mask = lh7a400_mask_irq,
52 .unmask = lh7a400_unmask_irq,
56 /* IRQ initialization */
58 void __init lh7a400_init_irq (void)
62 INTC_INTENC = 0xffffffff; /* Disable all interrupts */
63 GPIO_GPIOFINTEN = 0x00; /* Disable all GPIOF interrupts */
66 for (irq = 0; irq < NR_IRQS; ++irq) {
76 set_irq_chip (irq, &lh7a400_gpio_chip);
77 set_irq_handler (irq, do_level_IRQ); /* OK default */
80 set_irq_chip (irq, &lh7a400_internal_chip);
81 set_irq_handler (irq, do_level_IRQ);
83 set_irq_flags (irq, IRQF_VALID);
86 lh7a40x_init_board_irq ();
88 /* *** FIXME: the LH7a400 does use FIQ interrupts in some cases. For
89 the time being, these are not initialized. */