/* linux/arch/arm/plat-s3c24xx/irq.c
 *
 * Copyright (c) 2003-2004 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/syscore_ops.h>

#include <asm/irq.h>
#include <asm/mach/irq.h>

#include <plat/regs-irqtype.h>

#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/irq.h>

static void
s3c_irq_mask(struct irq_data *data)
{
	unsigned int irqno = data->irq - IRQ_EINT0;
	unsigned long mask;

	mask = __raw_readl(S3C2410_INTMSK);
	mask |= 1UL << irqno;
	__raw_writel(mask, S3C2410_INTMSK);
}

static inline void
s3c_irq_ack(struct irq_data *data)
{
	unsigned long bitval = 1UL << (data->irq - IRQ_EINT0);

	__raw_writel(bitval, S3C2410_SRCPND);
	__raw_writel(bitval, S3C2410_INTPND);
}

static inline void
s3c_irq_maskack(struct irq_data *data)
{
	unsigned long bitval = 1UL << (data->irq - IRQ_EINT0);
	unsigned long mask;

	mask = __raw_readl(S3C2410_INTMSK);
	__raw_writel(mask|bitval, S3C2410_INTMSK);

	__raw_writel(bitval, S3C2410_SRCPND);
	__raw_writel(bitval, S3C2410_INTPND);
}


static void
s3c_irq_unmask(struct irq_data *data)
{
	unsigned int irqno = data->irq;
	unsigned long mask;

	if (irqno != IRQ_TIMER4 && irqno != IRQ_EINT8t23)
		irqdbf2("s3c_irq_unmask %d\n", irqno);

	irqno -= IRQ_EINT0;

	mask = __raw_readl(S3C2410_INTMSK);
	mask &= ~(1UL << irqno);
	__raw_writel(mask, S3C2410_INTMSK);
}

struct irq_chip s3c_irq_level_chip = {
	.name		= "s3c-level",
	.irq_ack	= s3c_irq_maskack,
	.irq_mask	= s3c_irq_mask,
	.irq_unmask	= s3c_irq_unmask,
	.irq_set_wake	= s3c_irq_wake
};

struct irq_chip s3c_irq_chip = {
	.name		= "s3c",
	.irq_ack	= s3c_irq_ack,
	.irq_mask	= s3c_irq_mask,
	.irq_unmask	= s3c_irq_unmask,
	.irq_set_wake	= s3c_irq_wake
};

static void
s3c_irqext_mask(struct irq_data *data)
{
	unsigned int irqno = data->irq - EXTINT_OFF;
	unsigned long mask;

	mask = __raw_readl(S3C24XX_EINTMASK);