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/* linux/include/asm-arm/plat-s3c24xx/irq.h
*
* Copyright (c) 2004-2005 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* Header file for S3C24XX CPU IRQ support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/io.h>
#include <mach/irqs.h>
#include <mach/hardware.h>
#include <mach/regs-irq.h>
#include <mach/regs-gpio.h>
#define irqdbf(x...)
#define irqdbf2(x...)
#define EXTINT_OFF (IRQ_EINT4 - 4)
/* these are exported for arch/arm/mach-* usage */
extern struct irq_chip s3c_irq_level_chip;
extern struct irq_chip s3c_irq_chip;
static inline void
s3c_irqsub_mask(unsigned int irqno, unsigned int parentbit,
int subcheck)
{
unsigned long mask;
unsigned long submask;
#ifdef CONFIG_S3C2440_C_FIQ
unsigned long flags;
#endif
submask = __raw_readl(S3C2410_INTSUBMSK);
#ifdef CONFIG_S3C2440_C_FIQ
local_save_flags(flags);
local_fiq_disable();
#endif
mask = __raw_readl(S3C2410_INTMSK);
submask |= (1UL << (irqno - IRQ_S3CUART_RX0));
/* check to see if we need to mask the parent IRQ */
if ((submask & subcheck) == subcheck) {
__raw_writel(mask | parentbit, S3C2410_INTMSK);
}
/* write back masks */
__raw_writel(submask, S3C2410_INTSUBMSK);
#ifdef CONFIG_S3C2440_C_FIQ
local_irq_restore(flags);
#endif
}
static inline void
s3c_irqsub_unmask(unsigned int irqno, unsigned int parentbit)
{
unsigned long mask;
unsigned long submask;
#ifdef CONFIG_S3C2440_C_FIQ
unsigned long flags;
#endif
submask = __raw_readl(S3C2410_INTSUBMSK);
#ifdef CONFIG_S3C2440_C_FIQ
local_save_flags(flags);
local_fiq_disable();
#endif
mask = __raw_readl(S3C2410_INTMSK);
submask &= ~(1UL << (irqno - IRQ_S3CUART_RX0));
mask &= ~parentbit;
/* write back masks */
__raw_writel(submask, S3C2410_INTSUBMSK);
__raw_writel(mask, S3C2410_INTMSK);
#ifdef CONFIG_S3C2440_C_FIQ
local_irq_restore(flags);
#endif
}
static inline void
s3c_irqsub_maskack(unsigned int irqno, unsigned int parentmask, unsigned int group)
{
unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
s3c_irqsub_mask(irqno, parentmask, group);
__raw_writel(bit, S3C2410_SUBSRCPND);
/* only ack parent if we've got all the irqs (seems we must
* ack, all and hope that the irq system retriggers ok when
* the interrupt goes off again)
*/
if (1) {
__raw_writel(parentmask, S3C2410_SRCPND);
__raw_writel(parentmask, S3C2410_INTPND);
}
}
static inline void
s3c_irqsub_ack(unsigned int irqno, unsigned int parentmask, unsigned int group)
{
unsigned int bit = 1UL << (irqno - IRQ_S3CUART_RX0);
__raw_writel(bit, S3C2410_SUBSRCPND);
/* only ack parent if we've got all the irqs (seems we must
* ack, all and hope that the irq system retriggers ok when
* the interrupt goes off again)
*/
if (1) {
__raw_writel(parentmask, S3C2410_SRCPND);
__raw_writel(parentmask, S3C2410_INTPND);
}
}
/* exported for use in arch/arm/mach-s3c2410 */
#ifdef CONFIG_PM
extern int s3c_irq_wake(unsigned int irqno, unsigned int state);
#else
#define s3c_irq_wake NULL
#endif
extern int s3c_irqext_type(unsigned int irq, unsigned int type);
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