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49cbe786 EM |
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 | ||
a157f26b | 28 | static void icu_mask_irq(struct irq_data *d) |
49cbe786 | 29 | { |
a157f26b | 30 | __raw_writel(PRIORITY_NONE, ICU_INT_CONF(d->irq)); |
49cbe786 EM |
31 | } |
32 | ||
a157f26b | 33 | static void icu_unmask_irq(struct irq_data *d) |
49cbe786 | 34 | { |
a157f26b | 35 | __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(d->irq)); |
49cbe786 EM |
36 | } |
37 | ||
38 | static struct irq_chip icu_irq_chip = { | |
a157f26b LB |
39 | .name = "icu_irq", |
40 | .irq_ack = icu_mask_irq, | |
41 | .irq_mask = icu_mask_irq, | |
42 | .irq_unmask = icu_unmask_irq, | |
49cbe786 EM |
43 | }; |
44 | ||
45 | void __init icu_init_irq(void) | |
46 | { | |
47 | int irq; | |
48 | ||
49 | for (irq = 0; irq < 64; irq++) { | |
a157f26b | 50 | icu_mask_irq(irq_get_irq_data(irq)); |
6845664a TG |
51 | irq_set_chip(irq, &icu_irq_chip); |
52 | irq_set_handler(irq, handle_level_irq); | |
49cbe786 EM |
53 | set_irq_flags(irq, IRQF_VALID); |
54 | } | |
55 | } |