116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/* linux/include/asm-arm/plat-s3c24xx/irq.h
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*
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* Copyright (c) 2004-2005 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* Header file for S3C24XX CPU IRQ support
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <mach/regs-irq.h>
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#include <mach/regs-gpio.h>
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#define irqdbf(x...)
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#define irqdbf2(x...)
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#define EXTINT_OFF (IRQ_EINT4 - 4)
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/* these are exported for arch/arm/mach-* usage */
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extern struct irq_chip s3c_irq_level_chip;
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extern struct irq_chip s3c_irq_chip;
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static inline void
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s3c_irqsub_mask(unsigned int irqno, unsigned int parentbit,
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int subcheck)
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{
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unsigned long mask;
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unsigned long submask;
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submask = __raw_readl(S3C2410_INTSUBMSK);
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mask = __raw_readl(S3C2410_INTMSK);
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submask |= (1UL << (irqno - IRQ_S3CUART_RX0));
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/* check to see if we need to mask the parent IRQ */
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if ((submask & subcheck) == subcheck) {
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__raw_writel(mask | parentbit, S3C2410_INTMSK);
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}
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/* write back masks */
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__raw_writel(submask, S3C2410_INTSUBMSK);
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}
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static inline void
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s3c_irqsub_unmask(unsigned int irqno, unsigned int parentbit)
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{
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unsigned long mask;
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unsigned long submask;
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submask = __raw_readl(S3C2410_INTSUBMSK);
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mask = __raw_readl(S3C2410_INTMSK);
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submask &= ~(1UL << (irqno - IRQ_S3CUART_RX0));
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mask &= ~parentbit;
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/* write back masks */
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__raw_writel(submask, S3C2410_INTSUBMSK);
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__raw_writel(mask, S3C2410_INTMSK);
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}
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static inline void
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s3c_irqsub_maskack(unsigned int irqno, unsigned int parentmask, unsigned int group)
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{
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unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
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s3c_irqsub_mask(irqno, parentmask, group);
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__raw_writel(bit, S3C2410_SUBSRCPND);
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/* only ack parent if we've got all the irqs (seems we must
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* ack, all and hope that the irq system retriggers ok when
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* the interrupt goes off again)
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*/
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if (1) {
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__raw_writel(parentmask, S3C2410_SRCPND);
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__raw_writel(parentmask, S3C2410_INTPND);
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}
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}
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static inline void
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s3c_irqsub_ack(unsigned int irqno, unsigned int parentmask, unsigned int group)
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{
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unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
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__raw_writel(bit, S3C2410_SUBSRCPND);
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/* only ack parent if we've got all the irqs (seems we must
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* ack, all and hope that the irq system retriggers ok when
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* the interrupt goes off again)
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*/
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if (1) {
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__raw_writel(parentmask, S3C2410_SRCPND);
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__raw_writel(parentmask, S3C2410_INTPND);
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}
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}
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/* exported for use in arch/arm/mach-s3c2410 */
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#ifdef CONFIG_PM
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extern int s3c_irq_wake(unsigned int irqno, unsigned int state);
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#else
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#define s3c_irq_wake NULL
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#endif
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extern int s3c_irqext_type(unsigned int irq, unsigned int type);
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