| Eric Miao | 49cbe78 | 2009-01-20 14:15:18 +0800 | [diff] [blame] | 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 | |
| 28 | static void icu_mask_irq(unsigned int irq) |
| 29 | { |
| 30 | __raw_writel(PRIORITY_NONE, ICU_INT_CONF(irq)); |
| 31 | } |
| 32 | |
| 33 | static void icu_unmask_irq(unsigned int irq) |
| 34 | { |
| 35 | __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(irq)); |
| 36 | } |
| 37 | |
| 38 | static 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 | |
| 45 | void __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 | } |