1/* linux/arch/arm/mach-s3c2412/pm.c 2 * 3 * Copyright (c) 2006 Simtec Electronics 4 * Ben Dooks <ben@simtec.co.uk> 5 * 6 * http://armlinux.simtec.co.uk/. 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11*/ 12 13#include <linux/kernel.h> 14#include <linux/types.h> 15#include <linux/interrupt.h> 16#include <linux/list.h> 17#include <linux/timer.h> 18#include <linux/init.h> 19#include <linux/sysdev.h> 20#include <linux/platform_device.h> 21#include <linux/io.h> 22 23#include <mach/hardware.h> 24#include <asm/cacheflush.h> 25#include <asm/irq.h> 26 27#include <mach/regs-power.h> 28#include <mach/regs-gpioj.h> 29#include <mach/regs-gpio.h> 30#include <mach/regs-dsc.h> 31 32#include <plat/cpu.h> 33#include <plat/pm.h> 34 35#include <plat/s3c2412.h> 36 37extern void s3c2412_sleep_enter(void); 38 39static void s3c2412_cpu_suspend(void) 40{ 41 unsigned long tmp; 42 43 flush_cache_all(); 44 45 /* set our standby method to sleep */ 46 47 tmp = __raw_readl(S3C2412_PWRCFG); 48 tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP; 49 __raw_writel(tmp, S3C2412_PWRCFG); 50 51 s3c2412_sleep_enter(); 52} 53 54static void s3c2412_pm_prepare(void) 55{ 56} 57 58static int s3c2412_pm_add(struct sys_device *sysdev) 59{ 60 pm_cpu_prep = s3c2412_pm_prepare; 61 pm_cpu_sleep = s3c2412_cpu_suspend; 62 63 return 0; 64} 65 66static struct sleep_save s3c2412_sleep[] = { 67 SAVE_ITEM(S3C2412_DSC0), 68 SAVE_ITEM(S3C2412_DSC1), 69 SAVE_ITEM(S3C2413_GPJDAT), 70 SAVE_ITEM(S3C2413_GPJCON), 71 SAVE_ITEM(S3C2413_GPJUP), 72 73 /* save the PWRCFG to get back to original sleep method */ 74 75 SAVE_ITEM(S3C2412_PWRCFG), 76 77 /* save the sleep configuration anyway, just in case these 78 * get damaged during wakeup */ 79 80 SAVE_ITEM(S3C2412_GPBSLPCON), 81 SAVE_ITEM(S3C2412_GPCSLPCON), 82 SAVE_ITEM(S3C2412_GPDSLPCON), 83 SAVE_ITEM(S3C2412_GPFSLPCON), 84 SAVE_ITEM(S3C2412_GPGSLPCON), 85 SAVE_ITEM(S3C2412_GPHSLPCON), 86 SAVE_ITEM(S3C2413_GPJSLPCON), 87}; 88 89static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state) 90{ 91 s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); 92 return 0; 93} 94 95static int s3c2412_pm_resume(struct sys_device *dev) 96{ 97 unsigned long tmp; 98 99 tmp = __raw_readl(S3C2412_PWRCFG); 100 tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK; 101 tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE; 102 __raw_writel(tmp, S3C2412_PWRCFG); 103 104 s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); 105 return 0; 106} 107 108static struct sysdev_driver s3c2412_pm_driver = { 109 .add = s3c2412_pm_add, 110 .suspend = s3c2412_pm_suspend, 111 .resume = s3c2412_pm_resume, 112}; 113 114static __init int s3c2412_pm_init(void) 115{ 116 return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_pm_driver); 117} 118 119arch_initcall(s3c2412_pm_init); 120