| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // |
| 3 | // Copyright (c) 2006 Simtec Electronics |
| 4 | // Ben Dooks <ben@simtec.co.uk> |
| 5 | // |
| 6 | // http://armlinux.simtec.co.uk/. |
| 7 | |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/interrupt.h> |
| 11 | #include <linux/list.h> |
| 12 | #include <linux/timer.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/syscore_ops.h> |
| 16 | #include <linux/platform_device.h> |
| 17 | #include <linux/io.h> |
| 18 | |
| 19 | #include <asm/cacheflush.h> |
| 20 | #include <asm/irq.h> |
| 21 | |
| 22 | #include <mach/hardware.h> |
| 23 | #include <mach/regs-gpio.h> |
| 24 | |
| 25 | #include <plat/cpu.h> |
| 26 | #include <plat/pm.h> |
| 27 | #include <plat/wakeup-mask.h> |
| 28 | |
| 29 | #include "regs-dsc.h" |
| 30 | #include "s3c2412-power.h" |
| 31 | |
| 32 | extern void s3c2412_sleep_enter(void); |
| 33 | |
| 34 | static int s3c2412_cpu_suspend(unsigned long arg) |
| 35 | { |
| 36 | unsigned long tmp; |
| 37 | |
| 38 | /* set our standby method to sleep */ |
| 39 | |
| 40 | tmp = __raw_readl(S3C2412_PWRCFG); |
| 41 | tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP; |
| 42 | __raw_writel(tmp, S3C2412_PWRCFG); |
| 43 | |
| 44 | s3c2412_sleep_enter(); |
| 45 | |
| 46 | pr_info("Failed to suspend the system\n"); |
| 47 | return 1; /* Aborting suspend */ |
| 48 | } |
| 49 | |
| 50 | /* mapping of interrupts to parts of the wakeup mask */ |
| 51 | static const struct samsung_wakeup_mask wake_irqs[] = { |
| 52 | { .irq = IRQ_RTC, .bit = S3C2412_PWRCFG_RTC_MASKIRQ, }, |
| 53 | }; |
| 54 | |
| 55 | static void s3c2412_pm_prepare(void) |
| 56 | { |
| 57 | samsung_sync_wakemask(S3C2412_PWRCFG, |
| 58 | wake_irqs, ARRAY_SIZE(wake_irqs)); |
| 59 | } |
| 60 | |
| 61 | static int s3c2412_pm_add(struct device *dev, struct subsys_interface *sif) |
| 62 | { |
| 63 | pm_cpu_prep = s3c2412_pm_prepare; |
| 64 | pm_cpu_sleep = s3c2412_cpu_suspend; |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | static struct sleep_save s3c2412_sleep[] = { |
| 70 | SAVE_ITEM(S3C2412_DSC0), |
| 71 | SAVE_ITEM(S3C2412_DSC1), |
| 72 | SAVE_ITEM(S3C2413_GPJDAT), |
| 73 | SAVE_ITEM(S3C2413_GPJCON), |
| 74 | SAVE_ITEM(S3C2413_GPJUP), |
| 75 | |
| 76 | /* save the PWRCFG to get back to original sleep method */ |
| 77 | |
| 78 | SAVE_ITEM(S3C2412_PWRCFG), |
| 79 | |
| 80 | /* save the sleep configuration anyway, just in case these |
| 81 | * get damaged during wakeup */ |
| 82 | |
| 83 | SAVE_ITEM(S3C2412_GPBSLPCON), |
| 84 | SAVE_ITEM(S3C2412_GPCSLPCON), |
| 85 | SAVE_ITEM(S3C2412_GPDSLPCON), |
| 86 | SAVE_ITEM(S3C2412_GPFSLPCON), |
| 87 | SAVE_ITEM(S3C2412_GPGSLPCON), |
| 88 | SAVE_ITEM(S3C2412_GPHSLPCON), |
| 89 | SAVE_ITEM(S3C2413_GPJSLPCON), |
| 90 | }; |
| 91 | |
| 92 | static struct subsys_interface s3c2412_pm_interface = { |
| 93 | .name = "s3c2412_pm", |
| 94 | .subsys = &s3c2412_subsys, |
| 95 | .add_dev = s3c2412_pm_add, |
| 96 | }; |
| 97 | |
| 98 | static __init int s3c2412_pm_init(void) |
| 99 | { |
| 100 | return subsys_interface_register(&s3c2412_pm_interface); |
| 101 | } |
| 102 | |
| 103 | arch_initcall(s3c2412_pm_init); |
| 104 | |
| 105 | static int s3c2412_pm_suspend(void) |
| 106 | { |
| 107 | s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | static void s3c2412_pm_resume(void) |
| 112 | { |
| 113 | unsigned long tmp; |
| 114 | |
| 115 | tmp = __raw_readl(S3C2412_PWRCFG); |
| 116 | tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK; |
| 117 | tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE; |
| 118 | __raw_writel(tmp, S3C2412_PWRCFG); |
| 119 | |
| 120 | s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
| 121 | } |
| 122 | |
| 123 | struct syscore_ops s3c2412_pm_syscore_ops = { |
| 124 | .suspend = s3c2412_pm_suspend, |
| 125 | .resume = s3c2412_pm_resume, |
| 126 | }; |