Commit | Line | Data |
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a62e9030 | 1 | /* |
2 | * linux/arch/arm/mach-nuc93x/irq.c | |
3 | * | |
4 | * Copyright (c) 2008 Nuvoton technology corporation. | |
5 | * | |
6 | * Wan ZongShun <mcuos.com@gmail.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation;version 2 of the License. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/init.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/ioport.h> | |
18 | #include <linux/ptrace.h> | |
19 | #include <linux/sysdev.h> | |
20 | #include <linux/io.h> | |
21 | ||
22 | #include <asm/irq.h> | |
23 | #include <asm/mach/irq.h> | |
24 | ||
25 | #include <mach/hardware.h> | |
26 | #include <mach/regs-irq.h> | |
27 | ||
85dcd90c | 28 | static void nuc93x_irq_mask(struct irq_data *d) |
a62e9030 | 29 | { |
85dcd90c | 30 | __raw_writel(1 << d->irq, REG_AIC_MDCR); |
a62e9030 | 31 | } |
32 | ||
33 | /* | |
34 | * By the w90p910 spec,any irq,only write 1 | |
35 | * to REG_AIC_EOSCR for ACK | |
36 | */ | |
37 | ||
85dcd90c | 38 | static void nuc93x_irq_ack(struct irq_data *d) |
a62e9030 | 39 | { |
40 | __raw_writel(0x01, REG_AIC_EOSCR); | |
41 | } | |
42 | ||
85dcd90c | 43 | static void nuc93x_irq_unmask(struct irq_data *d) |
a62e9030 | 44 | { |
85dcd90c | 45 | __raw_writel(1 << d->irq, REG_AIC_MECR); |
a62e9030 | 46 | |
47 | } | |
48 | ||
49 | static struct irq_chip nuc93x_irq_chip = { | |
85dcd90c LB |
50 | .irq_ack = nuc93x_irq_ack, |
51 | .irq_mask = nuc93x_irq_mask, | |
52 | .irq_unmask = nuc93x_irq_unmask, | |
a62e9030 | 53 | }; |
54 | ||
55 | void __init nuc93x_init_irq(void) | |
56 | { | |
57 | int irqno; | |
58 | ||
59 | __raw_writel(0xFFFFFFFE, REG_AIC_MDCR); | |
60 | ||
61 | for (irqno = IRQ_WDT; irqno <= NR_IRQS; irqno++) { | |
f38c02f3 TG |
62 | irq_set_chip_and_handler(irqno, &nuc93x_irq_chip, |
63 | handle_level_irq); | |
a62e9030 | 64 | set_irq_flags(irqno, IRQF_VALID); |
65 | } | |
66 | } |