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-rw-r--r--arch/arm/mach-mmp/irq.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mach-mmp/irq.c b/arch/arm/mach-mmp/irq.c
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+++ b/arch/arm/mach-mmp/irq.c
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1/*
2 * linux/arch/arm/mach-mmp/irq.c
3 *
4 * Generic IRQ handling, GPIO IRQ demultiplexing, etc.
5 *
6 * Author: Bin Yang <bin.yang@marvell.com>
7 * Created: Sep 30, 2008
8 * Copyright: Marvell International Ltd.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/init.h>
16#include <linux/irq.h>
17#include <linux/io.h>
18
19#include <mach/regs-icu.h>
20
21#include "common.h"
22
23#define IRQ_ROUTE_TO_AP (ICU_INT_CONF_AP_INT | ICU_INT_CONF_IRQ)
24
25#define PRIORITY_DEFAULT 0x1
26#define PRIORITY_NONE 0x0 /* means IRQ disabled */
27
28static void icu_mask_irq(unsigned int irq)
29{
30 __raw_writel(PRIORITY_NONE, ICU_INT_CONF(irq));
31}
32
33static void icu_unmask_irq(unsigned int irq)
34{
35 __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(irq));
36}
37
38static struct irq_chip icu_irq_chip = {
39 .name = "icu_irq",
40 .ack = icu_mask_irq,
41 .mask = icu_mask_irq,
42 .unmask = icu_unmask_irq,
43};
44
45void __init icu_init_irq(void)
46{
47 int irq;
48
49 for (irq = 0; irq < 64; irq++) {
50 icu_mask_irq(irq);
51 set_irq_chip(irq, &icu_irq_chip);
52 set_irq_handler(irq, handle_level_irq);
53 set_irq_flags(irq, IRQF_VALID);
54 }
55}