[deliverable/linux.git] / arch / arm / mach-s3c64xx / irq-pm.c

/* arch/arm/plat-s3c64xx/irq-pm.c
 *
 * Copyright 2008 Openmoko, Inc.
 * Copyright 2008 Simtec Electronics
 *      Ben Dooks <ben@simtec.co.uk>
 *      http://armlinux.simtec.co.uk/
 *
 * S3C64XX - Interrupt handling Power Management
 *
 * 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/kernel.h>
#include <linux/syscore_ops.h>
#include <linux/interrupt.h>
#include <linux/serial_core.h>
#include <linux/irq.h>
#include <linux/io.h>

#include <mach/map.h>

#include <plat/regs-serial.h>
#include <plat/regs-timer.h>
#include <mach/regs-gpio.h>
#include <plat/cpu.h>
#include <plat/pm.h>

/* We handled all the IRQ types in this code, to save having to make several
 * small files to handle each different type separately. Having the EINT_GRP
 * code here shouldn't be as much bloat as the IRQ table space needed when
 * they are enabled. The added benefit is we ensure that these registers are
 * in the same state as we suspended.
 */

static struct sleep_save irq_save[] = {
	SAVE_ITEM(S3C64XX_PRIORITY),
	SAVE_ITEM(S3C64XX_EINT0CON0),
	SAVE_ITEM(S3C64XX_EINT0CON1),
	SAVE_ITEM(S3C64XX_EINT0FLTCON0),
	SAVE_ITEM(S3C64XX_EINT0FLTCON1),
	SAVE_ITEM(S3C64XX_EINT0FLTCON2),
	SAVE_ITEM(S3C64XX_EINT0FLTCON3),
	SAVE_ITEM(S3C64XX_EINT0MASK),
	SAVE_ITEM(S3C64XX_TINT_CSTAT),
};

static struct irq_grp_save {
	u32	fltcon;
	u32	con;
	u32	mask;
} eint_grp_save[5];

static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];

static int s3c64xx_irq_pm_suspend(void)
{
	struct irq_grp_save *grp = eint_grp_save;
	int i;

	S3C_PMDBG("%s: suspending IRQs\n", __func__);

	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));

	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
		irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);

	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
		grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4));
		grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
		grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
	}

	return 0;
}

static void s3c64xx_irq_pm_resume(void)
{
	struct irq_grp_save *grp = eint_grp_save;
	int i;

	S3C_PMDBG("%s: resuming IRQs\n", __func__);

	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));

	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
		__raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);

	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
		__raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4));
		__raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
		__raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
	}

	S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
}

struct syscore_ops s3c64xx_irq_syscore_ops = {
	.suspend = s3c64xx_irq_pm_suspend,
	.resume	 = s3c64xx_irq_pm_resume,
};

static __init int s3c64xx_syscore_init(void)
{
	register_syscore_ops(&s3c64xx_irq_syscore_ops);

	return 0;
}

core_initcall(s3c64xx_syscore_init);
Commit	Line	Data
966bcc14 BD	1	/* arch/arm/plat-s3c64xx/irq-pm.c
	2	*
	3	* Copyright 2008 Openmoko, Inc.
	4	* Copyright 2008 Simtec Electronics
	5	* Ben Dooks <ben@simtec.co.uk>
	6	* http://armlinux.simtec.co.uk/
	7	*
	8	* S3C64XX - Interrupt handling Power Management
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/kernel.h>
bb072c3c	16	#include <linux/syscore_ops.h>
966bcc14 BD	17	#include <linux/interrupt.h>
	18	#include <linux/serial_core.h>
	19	#include <linux/irq.h>
	20	#include <linux/io.h>
	21
	22	#include <mach/map.h>
	23
	24	#include <plat/regs-serial.h>
	25	#include <plat/regs-timer.h>
3501c9ae	26	#include <mach/regs-gpio.h>
966bcc14 BD	27	#include <plat/cpu.h>
	28	#include <plat/pm.h>
	29
	30	/* We handled all the IRQ types in this code, to save having to make several
	31	* small files to handle each different type separately. Having the EINT_GRP
	32	* code here shouldn't be as much bloat as the IRQ table space needed when
	33	* they are enabled. The added benefit is we ensure that these registers are
	34	* in the same state as we suspended.
	35	*/
	36
	37	static struct sleep_save irq_save[] = {
	38	SAVE_ITEM(S3C64XX_PRIORITY),
	39	SAVE_ITEM(S3C64XX_EINT0CON0),
	40	SAVE_ITEM(S3C64XX_EINT0CON1),
	41	SAVE_ITEM(S3C64XX_EINT0FLTCON0),
	42	SAVE_ITEM(S3C64XX_EINT0FLTCON1),
	43	SAVE_ITEM(S3C64XX_EINT0FLTCON2),
	44	SAVE_ITEM(S3C64XX_EINT0FLTCON3),
	45	SAVE_ITEM(S3C64XX_EINT0MASK),
	46	SAVE_ITEM(S3C64XX_TINT_CSTAT),
	47	};
	48
	49	static struct irq_grp_save {
	50	u32 fltcon;
	51	u32 con;
	52	u32 mask;
	53	} eint_grp_save[5];
	54
	55	static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
	56
bb072c3c	57	static int s3c64xx_irq_pm_suspend(void)
966bcc14 BD	58	{
	59	struct irq_grp_save *grp = eint_grp_save;
	60	int i;
	61
	62	S3C_PMDBG("%s: suspending IRQs\n", __func__);
	63
	64	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
	65
	66	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
	67	irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
	68
	69	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
	70	grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4));
	71	grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
	72	grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
	73	}
	74
	75	return 0;
	76	}
	77
bb072c3c	78	static void s3c64xx_irq_pm_resume(void)
966bcc14 BD	79	{
	80	struct irq_grp_save *grp = eint_grp_save;
	81	int i;
	82
	83	S3C_PMDBG("%s: resuming IRQs\n", __func__);
	84
	85	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
	86
	87	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
	88	__raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
	89
	90	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
	91	__raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4));
	92	__raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
	93	__raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
	94	}
	95
	96	S3C_PMDBG("%s: IRQ configuration restored\n", __func__);
966bcc14 BD	97	}
966bcc14 BD	98
bb072c3c	99	struct syscore_ops s3c64xx_irq_syscore_ops = {
966bcc14 BD	100	.suspend = s3c64xx_irq_pm_suspend,
	101	.resume = s3c64xx_irq_pm_resume,
	102	};
	103
bb072c3c	104	static __init int s3c64xx_syscore_init(void)
966bcc14	105	{
bb072c3c	106	register_syscore_ops(&s3c64xx_irq_syscore_ops);
966bcc14	107
bb072c3c RW	108	return 0;
bb072c3c RW	109	}
966bcc14	110
bb072c3c	111	core_initcall(s3c64xx_syscore_init);