1 /* linux/arch/arm/mach-s5pv210/pm.c
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
6 * S5PV210 - Power Management support
8 * Based on arch/arm/mach-s3c2410/pm.c
9 * Copyright (c) 2006 Simtec Electronics
10 * Ben Dooks <ben@simtec.co.uk>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
17 #include <linux/init.h>
18 #include <linux/suspend.h>
19 #include <linux/syscore_ops.h>
24 #include <plat/regs-timer.h>
26 #include <mach/regs-irq.h>
27 #include <mach/regs-clock.h>
29 static struct sleep_save s5pv210_core_save
[] = {
31 SAVE_ITEM(S5P_CLK_SRC0
),
32 SAVE_ITEM(S5P_CLK_SRC1
),
33 SAVE_ITEM(S5P_CLK_SRC2
),
34 SAVE_ITEM(S5P_CLK_SRC3
),
35 SAVE_ITEM(S5P_CLK_SRC4
),
36 SAVE_ITEM(S5P_CLK_SRC5
),
37 SAVE_ITEM(S5P_CLK_SRC6
),
39 /* Clock source Mask */
40 SAVE_ITEM(S5P_CLK_SRC_MASK0
),
41 SAVE_ITEM(S5P_CLK_SRC_MASK1
),
44 SAVE_ITEM(S5P_CLK_DIV0
),
45 SAVE_ITEM(S5P_CLK_DIV1
),
46 SAVE_ITEM(S5P_CLK_DIV2
),
47 SAVE_ITEM(S5P_CLK_DIV3
),
48 SAVE_ITEM(S5P_CLK_DIV4
),
49 SAVE_ITEM(S5P_CLK_DIV5
),
50 SAVE_ITEM(S5P_CLK_DIV6
),
51 SAVE_ITEM(S5P_CLK_DIV7
),
54 SAVE_ITEM(S5P_CLKGATE_MAIN0
),
55 SAVE_ITEM(S5P_CLKGATE_MAIN1
),
56 SAVE_ITEM(S5P_CLKGATE_MAIN2
),
58 /* Clock source Peri Gate */
59 SAVE_ITEM(S5P_CLKGATE_PERI0
),
60 SAVE_ITEM(S5P_CLKGATE_PERI1
),
62 /* Clock source SCLK Gate */
63 SAVE_ITEM(S5P_CLKGATE_SCLK0
),
64 SAVE_ITEM(S5P_CLKGATE_SCLK1
),
66 /* Clock IP Clock gate */
67 SAVE_ITEM(S5P_CLKGATE_IP0
),
68 SAVE_ITEM(S5P_CLKGATE_IP1
),
69 SAVE_ITEM(S5P_CLKGATE_IP2
),
70 SAVE_ITEM(S5P_CLKGATE_IP3
),
71 SAVE_ITEM(S5P_CLKGATE_IP4
),
73 /* Clock Blcok and Bus gate */
74 SAVE_ITEM(S5P_CLKGATE_BLOCK
),
75 SAVE_ITEM(S5P_CLKGATE_BUS0
),
78 SAVE_ITEM(S5P_CLK_OUT
),
79 SAVE_ITEM(S5P_MDNIE_SEL
),
82 SAVE_ITEM(S3C2410_TCFG0
),
83 SAVE_ITEM(S3C2410_TCFG1
),
84 SAVE_ITEM(S3C64XX_TINT_CSTAT
),
85 SAVE_ITEM(S3C2410_TCON
),
86 SAVE_ITEM(S3C2410_TCNTB(0)),
87 SAVE_ITEM(S3C2410_TCMPB(0)),
88 SAVE_ITEM(S3C2410_TCNTO(0)),
91 static int s5pv210_cpu_suspend(unsigned long arg
)
95 /* issue the standby signal into the pm unit. Note, we
96 * issue a write-buffer drain just in case */
103 "mcr p15, 0, %0, c7, c10, 5\n\t"
104 "mcr p15, 0, %0, c7, c10, 4\n\t"
105 "wfi" : : "r" (tmp
));
107 pr_info("Failed to suspend the system\n");
108 return 1; /* Aborting suspend */
111 static void s5pv210_pm_prepare(void)
115 /* ensure at least INFORM0 has the resume address */
116 __raw_writel(virt_to_phys(s3c_cpu_resume
), S5P_INFORM0
);
118 tmp
= __raw_readl(S5P_SLEEP_CFG
);
119 tmp
&= ~(S5P_SLEEP_CFG_OSC_EN
| S5P_SLEEP_CFG_USBOSC_EN
);
120 __raw_writel(tmp
, S5P_SLEEP_CFG
);
122 /* WFI for SLEEP mode configuration by SYSCON */
123 tmp
= __raw_readl(S5P_PWR_CFG
);
124 tmp
&= S5P_CFG_WFI_CLEAN
;
125 tmp
|= S5P_CFG_WFI_SLEEP
;
126 __raw_writel(tmp
, S5P_PWR_CFG
);
128 /* SYSCON interrupt handling disable */
129 tmp
= __raw_readl(S5P_OTHERS
);
130 tmp
|= S5P_OTHER_SYSC_INTOFF
;
131 __raw_writel(tmp
, S5P_OTHERS
);
133 s3c_pm_do_save(s5pv210_core_save
, ARRAY_SIZE(s5pv210_core_save
));
136 static int s5pv210_pm_add(struct device
*dev
, struct subsys_interface
*sif
)
138 pm_cpu_prep
= s5pv210_pm_prepare
;
139 pm_cpu_sleep
= s5pv210_cpu_suspend
;
144 static struct subsys_interface s5pv210_pm_interface
= {
145 .name
= "s5pv210_pm",
146 .subsys
= &s5pv210_subsys
,
147 .add_dev
= s5pv210_pm_add
,
150 static __init
int s5pv210_pm_drvinit(void)
152 return subsys_interface_register(&s5pv210_pm_interface
);
154 arch_initcall(s5pv210_pm_drvinit
);
156 static void s5pv210_pm_resume(void)
160 tmp
= __raw_readl(S5P_OTHERS
);
161 tmp
|= (S5P_OTHERS_RET_IO
| S5P_OTHERS_RET_CF
|\
162 S5P_OTHERS_RET_MMC
| S5P_OTHERS_RET_UART
);
163 __raw_writel(tmp
, S5P_OTHERS
);
165 s3c_pm_do_restore_core(s5pv210_core_save
, ARRAY_SIZE(s5pv210_core_save
));
168 static struct syscore_ops s5pv210_pm_syscore_ops
= {
169 .resume
= s5pv210_pm_resume
,
172 static __init
int s5pv210_pm_syscore_init(void)
174 register_syscore_ops(&s5pv210_pm_syscore_ops
);
177 arch_initcall(s5pv210_pm_syscore_init
);