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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> | |
4a858cfc | 19 | #include <linux/device.h> |
bb072c3c | 20 | #include <linux/syscore_ops.h> |
4b053e7a | 21 | #include <linux/platform_device.h> |
fced80c7 | 22 | #include <linux/io.h> |
4b053e7a | 23 | |
dc8fc7ed | 24 | #include <asm/cacheflush.h> |
4b053e7a BD |
25 | #include <asm/irq.h> |
26 | ||
b4353784 | 27 | #include <mach/hardware.h> |
a09e64fb | 28 | #include <mach/regs-gpio.h> |
4b053e7a | 29 | |
a2b7ba9c BD |
30 | #include <plat/cpu.h> |
31 | #include <plat/pm.h> | |
d5120ae7 | 32 | #include <plat/s3c2412.h> |
4b053e7a | 33 | |
b4353784 | 34 | #include "regs-dsc.h" |
14cce0e7 | 35 | #include "s3c2412-power.h" |
b4353784 | 36 | |
33234951 BD |
37 | extern void s3c2412_sleep_enter(void); |
38 | ||
29cb3cd2 | 39 | static int s3c2412_cpu_suspend(unsigned long arg) |
4b053e7a BD |
40 | { |
41 | unsigned long tmp; | |
42 | ||
43 | /* set our standby method to sleep */ | |
44 | ||
45 | tmp = __raw_readl(S3C2412_PWRCFG); | |
46 | tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP; | |
47 | __raw_writel(tmp, S3C2412_PWRCFG); | |
48 | ||
33234951 | 49 | s3c2412_sleep_enter(); |
29cb3cd2 | 50 | |
d3fcacf5 AK |
51 | pr_info("Failed to suspend the system\n"); |
52 | return 1; /* Aborting suspend */ | |
4b053e7a BD |
53 | } |
54 | ||
55 | static void s3c2412_pm_prepare(void) | |
56 | { | |
57 | } | |
58 | ||
04511a6f | 59 | static int s3c2412_pm_add(struct device *dev, struct subsys_interface *sif) |
4b053e7a BD |
60 | { |
61 | pm_cpu_prep = s3c2412_pm_prepare; | |
62 | pm_cpu_sleep = s3c2412_cpu_suspend; | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
67 | static struct sleep_save s3c2412_sleep[] = { | |
68 | SAVE_ITEM(S3C2412_DSC0), | |
69 | SAVE_ITEM(S3C2412_DSC1), | |
70 | SAVE_ITEM(S3C2413_GPJDAT), | |
71 | SAVE_ITEM(S3C2413_GPJCON), | |
72 | SAVE_ITEM(S3C2413_GPJUP), | |
73 | ||
74 | /* save the PWRCFG to get back to original sleep method */ | |
75 | ||
76 | SAVE_ITEM(S3C2412_PWRCFG), | |
77 | ||
78 | /* save the sleep configuration anyway, just in case these | |
79 | * get damaged during wakeup */ | |
80 | ||
81 | SAVE_ITEM(S3C2412_GPBSLPCON), | |
82 | SAVE_ITEM(S3C2412_GPCSLPCON), | |
83 | SAVE_ITEM(S3C2412_GPDSLPCON), | |
4b053e7a BD |
84 | SAVE_ITEM(S3C2412_GPFSLPCON), |
85 | SAVE_ITEM(S3C2412_GPGSLPCON), | |
86 | SAVE_ITEM(S3C2412_GPHSLPCON), | |
87 | SAVE_ITEM(S3C2413_GPJSLPCON), | |
88 | }; | |
89 | ||
4a858cfc KS |
90 | static struct subsys_interface s3c2412_pm_interface = { |
91 | .name = "s3c2412_pm", | |
92 | .subsys = &s3c2412_subsys, | |
93 | .add_dev = s3c2412_pm_add, | |
bb072c3c RW |
94 | }; |
95 | ||
96 | static __init int s3c2412_pm_init(void) | |
97 | { | |
ea04018e | 98 | return subsys_interface_register(&s3c2412_pm_interface); |
bb072c3c RW |
99 | } |
100 | ||
101 | arch_initcall(s3c2412_pm_init); | |
102 | ||
103 | static int s3c2412_pm_suspend(void) | |
4b053e7a | 104 | { |
6419711a | 105 | s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
4b053e7a BD |
106 | return 0; |
107 | } | |
108 | ||
bb072c3c | 109 | static void s3c2412_pm_resume(void) |
4b053e7a BD |
110 | { |
111 | unsigned long tmp; | |
112 | ||
113 | tmp = __raw_readl(S3C2412_PWRCFG); | |
114 | tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK; | |
115 | tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE; | |
116 | __raw_writel(tmp, S3C2412_PWRCFG); | |
117 | ||
6419711a | 118 | s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
4b053e7a BD |
119 | } |
120 | ||
bb072c3c | 121 | struct syscore_ops s3c2412_pm_syscore_ops = { |
4b053e7a BD |
122 | .suspend = s3c2412_pm_suspend, |
123 | .resume = s3c2412_pm_resume, | |
124 | }; |