132 lines
3 KiB
C
132 lines
3 KiB
C
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/* linux/arch/arm/mach-s3c2412/pm.c
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*
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* Copyright (c) 2006 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* http://armlinux.simtec.co.uk/.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/syscore_ops.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <asm/cacheflush.h>
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#include <asm/irq.h>
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#include <mach/hardware.h>
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#include <mach/regs-gpio.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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#include <plat/wakeup-mask.h>
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#include "regs-dsc.h"
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#include "s3c2412-power.h"
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extern void s3c2412_sleep_enter(void);
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static int s3c2412_cpu_suspend(unsigned long arg)
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{
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unsigned long tmp;
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/* set our standby method to sleep */
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tmp = __raw_readl(S3C2412_PWRCFG);
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tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP;
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__raw_writel(tmp, S3C2412_PWRCFG);
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s3c2412_sleep_enter();
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pr_info("Failed to suspend the system\n");
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return 1; /* Aborting suspend */
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}
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/* mapping of interrupts to parts of the wakeup mask */
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static struct samsung_wakeup_mask wake_irqs[] = {
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{ .irq = IRQ_RTC, .bit = S3C2412_PWRCFG_RTC_MASKIRQ, },
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};
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static void s3c2412_pm_prepare(void)
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{
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samsung_sync_wakemask(S3C2412_PWRCFG,
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wake_irqs, ARRAY_SIZE(wake_irqs));
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}
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static int s3c2412_pm_add(struct device *dev, struct subsys_interface *sif)
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{
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pm_cpu_prep = s3c2412_pm_prepare;
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pm_cpu_sleep = s3c2412_cpu_suspend;
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return 0;
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}
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static struct sleep_save s3c2412_sleep[] = {
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SAVE_ITEM(S3C2412_DSC0),
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SAVE_ITEM(S3C2412_DSC1),
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SAVE_ITEM(S3C2413_GPJDAT),
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SAVE_ITEM(S3C2413_GPJCON),
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SAVE_ITEM(S3C2413_GPJUP),
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/* save the PWRCFG to get back to original sleep method */
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SAVE_ITEM(S3C2412_PWRCFG),
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/* save the sleep configuration anyway, just in case these
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* get damaged during wakeup */
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SAVE_ITEM(S3C2412_GPBSLPCON),
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SAVE_ITEM(S3C2412_GPCSLPCON),
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SAVE_ITEM(S3C2412_GPDSLPCON),
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SAVE_ITEM(S3C2412_GPFSLPCON),
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SAVE_ITEM(S3C2412_GPGSLPCON),
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SAVE_ITEM(S3C2412_GPHSLPCON),
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SAVE_ITEM(S3C2413_GPJSLPCON),
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};
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static struct subsys_interface s3c2412_pm_interface = {
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.name = "s3c2412_pm",
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.subsys = &s3c2412_subsys,
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.add_dev = s3c2412_pm_add,
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};
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static __init int s3c2412_pm_init(void)
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{
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return subsys_interface_register(&s3c2412_pm_interface);
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}
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arch_initcall(s3c2412_pm_init);
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static int s3c2412_pm_suspend(void)
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{
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s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
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return 0;
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}
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static void s3c2412_pm_resume(void)
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{
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unsigned long tmp;
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tmp = __raw_readl(S3C2412_PWRCFG);
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tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
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tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
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__raw_writel(tmp, S3C2412_PWRCFG);
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s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
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}
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struct syscore_ops s3c2412_pm_syscore_ops = {
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.suspend = s3c2412_pm_suspend,
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.resume = s3c2412_pm_resume,
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};
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