[deliverable/linux.git] / arch / arm / mach-s3c24xx / irq-pm.c

/* linux/arch/arm/plat-s3c24xx/irq-om.c
 *
 * Copyright (c) 2003-2004 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *	http://armlinux.simtec.co.uk/
 *
 * S3C24XX - IRQ PM code
 *
 * 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/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/syscore_ops.h>

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

#include <asm/irq.h>

/* state for IRQs over sleep */

/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
 *
 * set bit to 1 in allow bitfield to enable the wakeup settings on it
*/

unsigned long s3c_irqwake_intallow	= 1L << 30 | 0xfL;
unsigned long s3c_irqwake_eintallow	= 0x0000fff0L;

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
Commit	Line	Data
65fa22b7 BD	1	/* linux/arch/arm/plat-s3c24xx/irq-om.c
65fa22b7 BD	2	*
e02f8664	3	* Copyright (c) 2003-2004 Simtec Electronics
65fa22b7 BD	4	* Ben Dooks <ben@simtec.co.uk>
	5	* http://armlinux.simtec.co.uk/
	6	*
	7	* S3C24XX - IRQ PM code
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
	14	#include <linux/init.h>
	15	#include <linux/module.h>
	16	#include <linux/interrupt.h>
57436c2d	17	#include <linux/irq.h>
d8fdec16	18	#include <linux/syscore_ops.h>
65fa22b7 BD	19
	20	#include <plat/cpu.h>
	21	#include <plat/pm.h>
	22	#include <plat/irq.h>
	23
57436c2d LB	24	#include <asm/irq.h>
57436c2d LB	25
65fa22b7 BD	26	/* state for IRQs over sleep */
	27
	28	/* default is to allow for EINT0..EINT15, and IRQ_RTC as wakeup sources
	29	*
	30	* set bit to 1 in allow bitfield to enable the wakeup settings on it
	31	*/
	32
b4a343e5	33	unsigned long s3c_irqwake_intallow = 1L << 30 \| 0xfL;
65fa22b7	34	unsigned long s3c_irqwake_eintallow = 0x0000fff0L;
65fa22b7	35
57436c2d	36	int s3c_irq_wake(struct irq_data *data, unsigned int state)
65fa22b7	37	{
b4a343e5	38	unsigned long irqbit = 1 << data->hwirq;
65fa22b7 BD	39
	40	if (!(s3c_irqwake_intallow & irqbit))
	41	return -ENOENT;
	42
b4a343e5 HS	43	pr_info("wake %s for hwirq %lu\n",
b4a343e5 HS	44	state ? "enabled" : "disabled", data->hwirq);
65fa22b7 BD	45
	46	if (!state)
	47	s3c_irqwake_intmask \|= irqbit;
	48	else
	49	s3c_irqwake_intmask &= ~irqbit;
	50
	51	return 0;
	52	}
	53
65fa22b7 BD	54	static struct sleep_save irq_save[] = {
	55	SAVE_ITEM(S3C2410_INTMSK),
	56	SAVE_ITEM(S3C2410_INTSUBMSK),
	57	};
	58
	59	/* the extint values move between the s3c2410/s3c2440 and the s3c2412
	60	* so we use an array to hold them, and to calculate the address of
	61	* the register at run-time
	62	*/
	63
	64	static unsigned long save_extint[3];
	65	static unsigned long save_eintflt[4];
	66	static unsigned long save_eintmask;
	67
d8fdec16	68	static int s3c24xx_irq_suspend(void)
65fa22b7 BD	69	{
	70	unsigned int i;
	71
	72	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
	73	save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
	74
	75	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
	76	save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
	77
	78	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
	79	save_eintmask = __raw_readl(S3C24XX_EINTMASK);
	80
	81	return 0;
	82	}
	83
d8fdec16	84	static void s3c24xx_irq_resume(void)
65fa22b7 BD	85	{
	86	unsigned int i;
	87
	88	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
	89	__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
	90
	91	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
	92	__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
	93
	94	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
	95	__raw_writel(save_eintmask, S3C24XX_EINTMASK);
65fa22b7	96	}
d8fdec16 HS	97
	98	struct syscore_ops s3c24xx_irq_syscore_ops = {
	99	.suspend = s3c24xx_irq_suspend,
	100	.resume = s3c24xx_irq_resume,
	101	};
ef602eb5 HS	102
	103	#ifdef CONFIG_CPU_S3C2416
	104	static struct sleep_save s3c2416_irq_save[] = {
	105	SAVE_ITEM(S3C2416_INTMSK2),
	106	};
	107
	108	static int s3c2416_irq_suspend(void)
	109	{
	110	s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
	111
	112	return 0;
	113	}
	114
	115	static void s3c2416_irq_resume(void)
	116	{
	117	s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
	118	}
	119
	120	struct syscore_ops s3c2416_irq_syscore_ops = {
	121	.suspend = s3c2416_irq_suspend,
	122	.resume = s3c2416_irq_resume,
	123	};
	124	#endif