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// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2003-2004 Simtec Electronics
// Ben Dooks <ben@simtec.co.uk>
// http://armlinux.simtec.co.uk/
//
// S3C24XX - IRQ PM code
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/syscore_ops.h>
#include <linux/io.h>
#include "cpu.h"
#include "pm.h"
#include "map-base.h"
#include "map-s3c.h"
#include "regs-irq.h"
#include "regs-gpio.h"
#include "pm-core.h"
#include <asm/irq.h>
int s3c_irq_wake(struct irq_data *data, unsigned int state)
{
unsigned long irqbit = 1 << data->hwirq;
if (!(s3c_irqwake_intallow & irqbit))
return -ENOENT;
pr_info("wake %s for hwirq %lu\n",
state ? "enabled" : "disabled", data->hwirq);
if (!state)
s3c_irqwake_intmask |= irqbit;
else
s3c_irqwake_intmask &= ~irqbit;
return 0;
}
static struct sleep_save irq_save[] = {
SAVE_ITEM(S3C2410_INTMSK),
SAVE_ITEM(S3C2410_INTSUBMSK),
};
/* the extint values move between the s3c2410/s3c2440 and the s3c2412
* so we use an array to hold them, and to calculate the address of
* the register at run-time
*/
static unsigned long save_extint[3];
static unsigned long save_eintflt[4];
static unsigned long save_eintmask;
static int s3c24xx_irq_suspend(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(save_extint); i++)
save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
save_eintmask = __raw_readl(S3C24XX_EINTMASK);
return 0;
}
static void s3c24xx_irq_resume(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(save_extint); i++)
__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
__raw_writel(save_eintmask, S3C24XX_EINTMASK);
}
struct syscore_ops s3c24xx_irq_syscore_ops = {
.suspend = s3c24xx_irq_suspend,
.resume = s3c24xx_irq_resume,
};
#ifdef CONFIG_CPU_S3C2416
static struct sleep_save s3c2416_irq_save[] = {
SAVE_ITEM(S3C2416_INTMSK2),
};
static int s3c2416_irq_suspend(void)
{
s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
return 0;
}
static void s3c2416_irq_resume(void)
{
s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
}
struct syscore_ops s3c2416_irq_syscore_ops = {
.suspend = s3c2416_irq_suspend,
.resume = s3c2416_irq_resume,
};
#endif
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