77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
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/*
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* linux/arch/arm/mach-w90x900/irq.c
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*
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* based on linux/arch/arm/plat-s3c24xx/irq.c by Ben Dooks
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*
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* Copyright (c) 2008 Nuvoton technology corporation
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* All rights reserved.
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/ptrace.h>
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#include <linux/sysdev.h>
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#include <linux/io.h>
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#include <asm/irq.h>
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#include <asm/mach/irq.h>
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#include <mach/hardware.h>
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#include <mach/regs-irq.h>
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static void w90x900_irq_mask(unsigned int irq)
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{
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__raw_writel(1 << irq, REG_AIC_MDCR);
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}
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/*
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* By the w90p910 spec,any irq,only write 1
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* to REG_AIC_EOSCR for ACK
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*/
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static void w90x900_irq_ack(unsigned int irq)
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{
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__raw_writel(0x01, REG_AIC_EOSCR);
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}
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static void w90x900_irq_unmask(unsigned int irq)
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{
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unsigned long mask;
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if (irq == IRQ_T_INT_GROUP) {
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mask = __raw_readl(REG_AIC_GEN);
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__raw_writel(TIME_GROUP_IRQ | mask, REG_AIC_GEN);
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__raw_writel(1 << IRQ_T_INT_GROUP, REG_AIC_MECR);
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}
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__raw_writel(1 << irq, REG_AIC_MECR);
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}
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static struct irq_chip w90x900_irq_chip = {
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.ack = w90x900_irq_ack,
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.mask = w90x900_irq_mask,
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.unmask = w90x900_irq_unmask,
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};
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void __init w90x900_init_irq(void)
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{
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int irqno;
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__raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
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for (irqno = IRQ_WDT; irqno <= IRQ_ADC; irqno++) {
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set_irq_chip(irqno, &w90x900_irq_chip);
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set_irq_handler(irqno, handle_level_irq);
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set_irq_flags(irqno, IRQF_VALID);
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}
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}
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