7ec80ddf |
1 | /* |
2 | * linux/arch/arm/mach-w90x900/irq.c |
3 | * |
4 | * based on linux/arch/arm/plat-s3c24xx/irq.c by Ben Dooks |
5 | * |
6 | * Copyright (c) 2008 Nuvoton technology corporation |
7 | * All rights reserved. |
8 | * |
9 | * Wan ZongShun <mcuos.com@gmail.com> |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by |
13 | * the Free Software Foundation; either version 2 of the License, or |
14 | * (at your option) any later version. |
15 | * |
16 | */ |
17 | |
18 | #include <linux/init.h> |
19 | #include <linux/module.h> |
20 | #include <linux/interrupt.h> |
21 | #include <linux/ioport.h> |
22 | #include <linux/ptrace.h> |
23 | #include <linux/sysdev.h> |
24 | #include <linux/io.h> |
25 | |
26 | #include <asm/irq.h> |
27 | #include <asm/mach/irq.h> |
28 | |
29 | #include <mach/hardware.h> |
30 | #include <mach/regs-irq.h> |
31 | |
32 | static void w90x900_irq_mask(unsigned int irq) |
33 | { |
34 | __raw_writel(1 << irq, REG_AIC_MDCR); |
35 | } |
36 | |
37 | /* |
38 | * By the w90p910 spec,any irq,only write 1 |
39 | * to REG_AIC_EOSCR for ACK |
40 | */ |
41 | |
42 | static void w90x900_irq_ack(unsigned int irq) |
43 | { |
44 | __raw_writel(0x01, REG_AIC_EOSCR); |
45 | } |
46 | |
47 | static void w90x900_irq_unmask(unsigned int irq) |
48 | { |
49 | unsigned long mask; |
50 | |
51 | if (irq == IRQ_T_INT_GROUP) { |
52 | mask = __raw_readl(REG_AIC_GEN); |
53 | __raw_writel(TIME_GROUP_IRQ | mask, REG_AIC_GEN); |
54 | __raw_writel(1 << IRQ_T_INT_GROUP, REG_AIC_MECR); |
55 | } |
56 | __raw_writel(1 << irq, REG_AIC_MECR); |
57 | } |
58 | |
59 | static struct irq_chip w90x900_irq_chip = { |
60 | .ack = w90x900_irq_ack, |
61 | .mask = w90x900_irq_mask, |
62 | .unmask = w90x900_irq_unmask, |
63 | }; |
64 | |
65 | void __init w90x900_init_irq(void) |
66 | { |
67 | int irqno; |
68 | |
69 | __raw_writel(0xFFFFFFFE, REG_AIC_MDCR); |
70 | |
71 | for (irqno = IRQ_WDT; irqno <= IRQ_ADC; irqno++) { |
72 | set_irq_chip(irqno, &w90x900_irq_chip); |
73 | set_irq_handler(irqno, handle_level_irq); |
74 | set_irq_flags(irqno, IRQF_VALID); |
75 | } |
76 | } |