117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/* linux/arch/arm/mach-s3c2410/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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* S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/suspend.h>
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#include <linux/errno.h>
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#include <linux/time.h>
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#include <linux/sysdev.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <asm/arch/regs-gpio.h>
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#include <asm/arch/regs-s3c6400-clock.h>
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#include <asm/arch/regs-rtc.h>
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#include <asm/plat-s3c24xx/cpu.h>
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#include <asm/plat-s3c24xx/pm.h>
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#ifdef CONFIG_S3C2410_PM_DEBUG
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extern void pm_dbg(const char *fmt, ...);
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#define DBG(fmt...) pm_dbg(fmt)
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#else
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#define DBG(fmt...) printk(KERN_DEBUG fmt)
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#endif
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static void s3c6400_cpu_suspend(void)
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{
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unsigned long tmp;
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/* issue the standby signal into the pm unit. Note, we
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* issue a write-buffer drain just in case */
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tmp = 0;
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asm("b 1f\n\t"
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".align 5\n\t"
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"1:\n\t"
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"mcr p15, 0, %0, c7, c10, 5\n\t"
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"mcr p15, 0, %0, c7, c10, 4\n\t"
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"mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
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/* we should never get past here */
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panic("sleep resumed to originator?");
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}
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static void s3c6400_pm_prepare(void)
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{
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}
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static int s3c6400_pm_add(struct sys_device *sysdev)
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{
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pm_cpu_prep = s3c6400_pm_prepare;
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pm_cpu_sleep = s3c6400_cpu_suspend;
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return 0;
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}
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static struct sleep_save s3c6400_sleep[] = {
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};
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static int s3c6400_pm_suspend(struct sys_device *dev, pm_message_t state)
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{
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s3c2410_pm_do_save(s3c6400_sleep, ARRAY_SIZE(s3c6400_sleep));
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return 0;
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}
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static int s3c6400_pm_resume(struct sys_device *dev)
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{
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unsigned long tmp;
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#if 0
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tmp = __raw_readl(S3C_PWR_CFG);
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tmp &= ~(0x60<<0);
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tmp |= (0x1<<5);
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__raw_writel(tmp, S3C_PWR_CFG);
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#endif
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s3c2410_pm_do_restore(s3c6400_sleep, ARRAY_SIZE(s3c6400_sleep));
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return 0;
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}
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static struct sysdev_driver s3c6400_pm_driver = {
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.add = s3c6400_pm_add,
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.suspend = s3c6400_pm_suspend,
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.resume = s3c6400_pm_resume,
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};
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static __init int s3c6400_pm_init(void)
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{
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return sysdev_driver_register(&s3c6400_sysclass, &s3c6400_pm_driver);
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}
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arch_initcall(s3c6400_pm_init);
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