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authorwanzongshun <mcuos.com@gmail.com>2009-12-31 09:06:05 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-01-27 17:03:00 -0500
commita62e90308f7b6965310cf4ec61393aef6861f50d (patch)
tree3370d9bdd43f2f75607ad59f921adafbecf537a7 /arch/arm/mach-nuc93x/irq.c
parent74d2e4f8d79ae0c4b6ec027958d5b18058662eea (diff)
ARM: 5859/1: Add nuc93x platform support
The previous nuc932 support patches have been discarded by me and because it belongs to another SoCs series named nuc93x,at present, which included nuc931 and nuc932, I think it is better to create a new mach-nuc93x,So I made the patch,and request your advice.Thanks! Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-nuc93x/irq.c')
-rw-r--r--arch/arm/mach-nuc93x/irq.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/arm/mach-nuc93x/irq.c b/arch/arm/mach-nuc93x/irq.c
new file mode 100644
index 000000000000..a7a88ea4ec31
--- /dev/null
+++ b/arch/arm/mach-nuc93x/irq.c
@@ -0,0 +1,66 @@
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
28static void nuc93x_irq_mask(unsigned int irq)
29{
30 __raw_writel(1 << irq, REG_AIC_MDCR);
31}
32
33/*
34 * By the w90p910 spec,any irq,only write 1
35 * to REG_AIC_EOSCR for ACK
36 */
37
38static void nuc93x_irq_ack(unsigned int irq)
39{
40 __raw_writel(0x01, REG_AIC_EOSCR);
41}
42
43static void nuc93x_irq_unmask(unsigned int irq)
44{
45 __raw_writel(1 << irq, REG_AIC_MECR);
46
47}
48
49static struct irq_chip nuc93x_irq_chip = {
50 .ack = nuc93x_irq_ack,
51 .mask = nuc93x_irq_mask,
52 .unmask = nuc93x_irq_unmask,
53};
54
55void __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++) {
62 set_irq_chip(irqno, &nuc93x_irq_chip);
63 set_irq_handler(irqno, handle_level_irq);
64 set_irq_flags(irqno, IRQF_VALID);
65 }
66}