Add linux-next specific files for 20110831
[linux-2.6/next.git] / arch / arm / mach-nuc93x / irq.c
blobaa279f23e342af3437b8a5af84f2dcbe5c83fc0b
1 /*
2 * linux/arch/arm/mach-nuc93x/irq.c
4 * Copyright (c) 2008 Nuvoton technology corporation.
6 * Wan ZongShun <mcuos.com@gmail.com>
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.
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>
22 #include <asm/irq.h>
23 #include <asm/mach/irq.h>
25 #include <mach/hardware.h>
26 #include <mach/regs-irq.h>
28 static void nuc93x_irq_mask(struct irq_data *d)
30 __raw_writel(1 << d->irq, REG_AIC_MDCR);
34 * By the w90p910 spec,any irq,only write 1
35 * to REG_AIC_EOSCR for ACK
38 static void nuc93x_irq_ack(struct irq_data *d)
40 __raw_writel(0x01, REG_AIC_EOSCR);
43 static void nuc93x_irq_unmask(struct irq_data *d)
45 __raw_writel(1 << d->irq, REG_AIC_MECR);
49 static struct irq_chip nuc93x_irq_chip = {
50 .irq_ack = nuc93x_irq_ack,
51 .irq_mask = nuc93x_irq_mask,
52 .irq_unmask = nuc93x_irq_unmask,
55 void __init nuc93x_init_irq(void)
57 int irqno;
59 __raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
61 for (irqno = IRQ_WDT; irqno <= NR_IRQS; irqno++) {
62 irq_set_chip_and_handler(irqno, &nuc93x_irq_chip,
63 handle_level_irq);
64 set_irq_flags(irqno, IRQF_VALID);