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Ben Dooksa21765a2007-02-11 18:31:01 +01001/* linux/arch/arm/mach-s3c2412/pm.c
Ben Dooks4b053e72006-09-22 15:42:18 +01002 *
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>
Kay Sievers4a858cf2011-12-21 16:01:38 -080019#include <linux/device.h>
Rafael J. Wysockibb072c32011-04-22 22:03:21 +020020#include <linux/syscore_ops.h>
Ben Dooks4b053e72006-09-22 15:42:18 +010021#include <linux/platform_device.h>
Russell Kingfced80c2008-09-06 12:10:45 +010022#include <linux/io.h>
Ben Dooks4b053e72006-09-22 15:42:18 +010023
Russell Kinga09e64f2008-08-05 16:14:15 +010024#include <mach/hardware.h>
Ben Dooksdc8fc7e2009-04-28 10:06:00 +010025#include <asm/cacheflush.h>
Ben Dooks4b053e72006-09-22 15:42:18 +010026#include <asm/irq.h>
27
Russell Kinga09e64f2008-08-05 16:14:15 +010028#include <mach/regs-power.h>
29#include <mach/regs-gpioj.h>
30#include <mach/regs-gpio.h>
31#include <mach/regs-dsc.h>
Ben Dooks4b053e72006-09-22 15:42:18 +010032
Ben Dooksa2b7ba92008-10-07 22:26:09 +010033#include <plat/cpu.h>
34#include <plat/pm.h>
Ben Dooks4b053e72006-09-22 15:42:18 +010035
Ben Dooksd5120ae2008-10-07 23:09:51 +010036#include <plat/s3c2412.h>
Ben Dooks4b053e72006-09-22 15:42:18 +010037
Ben Dooks33234952007-12-23 03:09:34 +010038extern void s3c2412_sleep_enter(void);
39
Russell King29cb3cd2011-07-02 09:54:01 +010040static int s3c2412_cpu_suspend(unsigned long arg)
Ben Dooks4b053e72006-09-22 15:42:18 +010041{
42 unsigned long tmp;
43
44 /* set our standby method to sleep */
45
46 tmp = __raw_readl(S3C2412_PWRCFG);
47 tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP;
48 __raw_writel(tmp, S3C2412_PWRCFG);
49
Ben Dooks33234952007-12-23 03:09:34 +010050 s3c2412_sleep_enter();
Russell King29cb3cd2011-07-02 09:54:01 +010051
52 panic("sleep resumed to originator?");
Ben Dooks4b053e72006-09-22 15:42:18 +010053}
54
55static void s3c2412_pm_prepare(void)
56{
57}
58
Kay Sievers4a858cf2011-12-21 16:01:38 -080059static int s3c2412_pm_add(struct device *dev)
Ben Dooks4b053e72006-09-22 15:42:18 +010060{
61 pm_cpu_prep = s3c2412_pm_prepare;
62 pm_cpu_sleep = s3c2412_cpu_suspend;
63
64 return 0;
65}
66
67static 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),
Ben Dooks4b053e72006-09-22 15:42:18 +010084 SAVE_ITEM(S3C2412_GPFSLPCON),
85 SAVE_ITEM(S3C2412_GPGSLPCON),
86 SAVE_ITEM(S3C2412_GPHSLPCON),
87 SAVE_ITEM(S3C2413_GPJSLPCON),
88};
89
Kay Sievers4a858cf2011-12-21 16:01:38 -080090static struct subsys_interface s3c2412_pm_interface = {
91 .name = "s3c2412_pm",
92 .subsys = &s3c2412_subsys,
93 .add_dev = s3c2412_pm_add,
Rafael J. Wysockibb072c32011-04-22 22:03:21 +020094};
95
96static __init int s3c2412_pm_init(void)
97{
Kay Sievers4a858cf2011-12-21 16:01:38 -080098 return subsys_interface_register_register(&s3c2412_pm_interface);
Rafael J. Wysockibb072c32011-04-22 22:03:21 +020099}
100
101arch_initcall(s3c2412_pm_init);
102
103static int s3c2412_pm_suspend(void)
Ben Dooks4b053e72006-09-22 15:42:18 +0100104{
Ben Dooks64197112008-12-12 00:24:06 +0000105 s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
Ben Dooks4b053e72006-09-22 15:42:18 +0100106 return 0;
107}
108
Rafael J. Wysockibb072c32011-04-22 22:03:21 +0200109static void s3c2412_pm_resume(void)
Ben Dooks4b053e72006-09-22 15:42:18 +0100110{
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
Ben Dooks64197112008-12-12 00:24:06 +0000118 s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
Ben Dooks4b053e72006-09-22 15:42:18 +0100119}
120
Rafael J. Wysockibb072c32011-04-22 22:03:21 +0200121struct syscore_ops s3c2412_pm_syscore_ops = {
Ben Dooks4b053e72006-09-22 15:42:18 +0100122 .suspend = s3c2412_pm_suspend,
123 .resume = s3c2412_pm_resume,
124};