projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a21765a7 | 1 | /* linux/arch/arm/mach-s3c2412/pm.c |
| 4b053e7a BD |
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> | |
| fced80c7 | 21 | #include <linux/io.h> |
| 4b053e7a | 22 | |
| a09e64fb | 23 | #include <mach/hardware.h> |
| dc8fc7ed | 24 | #include <asm/cacheflush.h> |
| 4b053e7a BD |
25 | #include <asm/irq.h> |
| 26 | ||
| a09e64fb RK |
27 | #include <mach/regs-power.h> |
| 28 | #include <mach/regs-gpioj.h> | |
| 29 | #include <mach/regs-gpio.h> | |
| 30 | #include <mach/regs-dsc.h> | |
| 4b053e7a | 31 | |
| a2b7ba9c BD |
32 | #include <plat/cpu.h> |
| 33 | #include <plat/pm.h> | |
| 4b053e7a | 34 | |
| d5120ae7 | 35 | #include <plat/s3c2412.h> |
| 4b053e7a | 36 | |
| 33234951 BD |
37 | extern void s3c2412_sleep_enter(void); |
| 38 | ||
| 4b053e7a BD |
39 | static void s3c2412_cpu_suspend(void) |
| 40 | { | |
| 41 | unsigned long tmp; | |
| 42 | ||
| dc8fc7ed BD |
43 | flush_cache_all(); |
| 44 | ||
| 4b053e7a BD |
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 | ||
| 33234951 | 51 | s3c2412_sleep_enter(); |
| 4b053e7a BD |
52 | } |
| 53 | ||
| 54 | static void s3c2412_pm_prepare(void) | |
| 55 | { | |
| 56 | } | |
| 57 | ||
| 58 | static 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 | ||
| 66 | static 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), | |
| 4b053e7a BD |
83 | SAVE_ITEM(S3C2412_GPFSLPCON), |
| 84 | SAVE_ITEM(S3C2412_GPGSLPCON), | |
| 85 | SAVE_ITEM(S3C2412_GPHSLPCON), | |
| 86 | SAVE_ITEM(S3C2413_GPJSLPCON), | |
| 87 | }; | |
| 88 | ||
| 89 | static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state) | |
| 90 | { | |
| 6419711a | 91 | s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
| 4b053e7a BD |
92 | return 0; |
| 93 | } | |
| 94 | ||
| 95 | static 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 | ||
| 6419711a | 104 | s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
| 4b053e7a BD |
105 | return 0; |
| 106 | } | |
| 107 | ||
| 108 | static struct sysdev_driver s3c2412_pm_driver = { | |
| 109 | .add = s3c2412_pm_add, | |
| 110 | .suspend = s3c2412_pm_suspend, | |
| 111 | .resume = s3c2412_pm_resume, | |
| 112 | }; | |
| 113 | ||
| 114 | static __init int s3c2412_pm_init(void) | |
| 115 | { | |
| 116 | return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_pm_driver); | |
| 117 | } | |
| 118 | ||
| 119 | arch_initcall(s3c2412_pm_init); |