forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
pm.c
175 lines (142 loc) · 4.03 KB
/
pm.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/* linux/arch/arm/mach-s5pv210/pm.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* S5PV210 - Power Management support
*
* Based on arch/arm/mach-s3c2410/pm.c
* Copyright (c) 2006 Simtec Electronics
* Ben Dooks <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/io.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/regs-timer.h>
#include <mach/regs-irq.h>
#include <mach/regs-clock.h>
static struct sleep_save s5pv210_core_save[] = {
/* Clock source */
SAVE_ITEM(S5P_CLK_SRC0),
SAVE_ITEM(S5P_CLK_SRC1),
SAVE_ITEM(S5P_CLK_SRC2),
SAVE_ITEM(S5P_CLK_SRC3),
SAVE_ITEM(S5P_CLK_SRC4),
SAVE_ITEM(S5P_CLK_SRC5),
SAVE_ITEM(S5P_CLK_SRC6),
/* Clock source Mask */
SAVE_ITEM(S5P_CLK_SRC_MASK0),
SAVE_ITEM(S5P_CLK_SRC_MASK1),
/* Clock Divider */
SAVE_ITEM(S5P_CLK_DIV0),
SAVE_ITEM(S5P_CLK_DIV1),
SAVE_ITEM(S5P_CLK_DIV2),
SAVE_ITEM(S5P_CLK_DIV3),
SAVE_ITEM(S5P_CLK_DIV4),
SAVE_ITEM(S5P_CLK_DIV5),
SAVE_ITEM(S5P_CLK_DIV6),
SAVE_ITEM(S5P_CLK_DIV7),
/* Clock Main Gate */
SAVE_ITEM(S5P_CLKGATE_MAIN0),
SAVE_ITEM(S5P_CLKGATE_MAIN1),
SAVE_ITEM(S5P_CLKGATE_MAIN2),
/* Clock source Peri Gate */
SAVE_ITEM(S5P_CLKGATE_PERI0),
SAVE_ITEM(S5P_CLKGATE_PERI1),
/* Clock source SCLK Gate */
SAVE_ITEM(S5P_CLKGATE_SCLK0),
SAVE_ITEM(S5P_CLKGATE_SCLK1),
/* Clock IP Clock gate */
SAVE_ITEM(S5P_CLKGATE_IP0),
SAVE_ITEM(S5P_CLKGATE_IP1),
SAVE_ITEM(S5P_CLKGATE_IP2),
SAVE_ITEM(S5P_CLKGATE_IP3),
SAVE_ITEM(S5P_CLKGATE_IP4),
/* Clock Blcok and Bus gate */
SAVE_ITEM(S5P_CLKGATE_BLOCK),
SAVE_ITEM(S5P_CLKGATE_BUS0),
/* Clock ETC */
SAVE_ITEM(S5P_CLK_OUT),
SAVE_ITEM(S5P_MDNIE_SEL),
/* PWM Register */
SAVE_ITEM(S3C2410_TCFG0),
SAVE_ITEM(S3C2410_TCFG1),
SAVE_ITEM(S3C64XX_TINT_CSTAT),
SAVE_ITEM(S3C2410_TCON),
SAVE_ITEM(S3C2410_TCNTB(0)),
SAVE_ITEM(S3C2410_TCMPB(0)),
SAVE_ITEM(S3C2410_TCNTO(0)),
};
void s5pv210_cpu_suspend(void)
{
unsigned long tmp;
/* issue the standby signal into the pm unit. Note, we
* issue a write-buffer drain just in case */
tmp = 0;
asm("b 1f\n\t"
".align 5\n\t"
"1:\n\t"
"mcr p15, 0, %0, c7, c10, 5\n\t"
"mcr p15, 0, %0, c7, c10, 4\n\t"
"wfi" : : "r" (tmp));
/* we should never get past here */
panic("sleep resumed to originator?");
}
static void s5pv210_pm_prepare(void)
{
unsigned int tmp;
/* ensure at least INFORM0 has the resume address */
__raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
tmp = __raw_readl(S5P_SLEEP_CFG);
tmp &= ~(S5P_SLEEP_CFG_OSC_EN | S5P_SLEEP_CFG_USBOSC_EN);
__raw_writel(tmp, S5P_SLEEP_CFG);
/* WFI for SLEEP mode configuration by SYSCON */
tmp = __raw_readl(S5P_PWR_CFG);
tmp &= S5P_CFG_WFI_CLEAN;
tmp |= S5P_CFG_WFI_SLEEP;
__raw_writel(tmp, S5P_PWR_CFG);
/* SYSCON interrupt handling disable */
tmp = __raw_readl(S5P_OTHERS);
tmp |= S5P_OTHER_SYSC_INTOFF;
__raw_writel(tmp, S5P_OTHERS);
s3c_pm_do_save(s5pv210_core_save, ARRAY_SIZE(s5pv210_core_save));
}
static int s5pv210_pm_add(struct sys_device *sysdev)
{
pm_cpu_prep = s5pv210_pm_prepare;
pm_cpu_sleep = s5pv210_cpu_suspend;
return 0;
}
static struct sysdev_driver s5pv210_pm_driver = {
.add = s5pv210_pm_add,
};
static __init int s5pv210_pm_drvinit(void)
{
return sysdev_driver_register(&s5pv210_sysclass, &s5pv210_pm_driver);
}
arch_initcall(s5pv210_pm_drvinit);
static void s5pv210_pm_resume(void)
{
u32 tmp;
tmp = __raw_readl(S5P_OTHERS);
tmp |= (S5P_OTHERS_RET_IO | S5P_OTHERS_RET_CF |\
S5P_OTHERS_RET_MMC | S5P_OTHERS_RET_UART);
__raw_writel(tmp , S5P_OTHERS);
s3c_pm_do_restore_core(s5pv210_core_save, ARRAY_SIZE(s5pv210_core_save));
}
static struct syscore_ops s5pv210_pm_syscore_ops = {
.resume = s5pv210_pm_resume,
};
static __init int s5pv210_pm_syscore_init(void)
{
register_syscore_ops(&s5pv210_pm_syscore_ops);
return 0;
}
arch_initcall(s5pv210_pm_syscore_init);