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
|
// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (c) 2006 Simtec Electronics
// Ben Dooks <ben@simtec.co.uk>
//
// S3C2410 (and compatible) Power Manager (Suspend-To-RAM) support
#include <linux/init.h>
#include <linux/suspend.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/device.h>
#include <linux/syscore_ops.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/regs-gpio.h>
#include <mach/gpio-samsung.h>
#include <plat/gpio-cfg.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include "h1940.h"
static void s3c2410_pm_prepare(void)
{
/* ensure at least GSTATUS3 has the resume address */
__raw_writel(__pa_symbol(s3c_cpu_resume), S3C2410_GSTATUS3);
S3C_PMDBG("GSTATUS3 0x%08x\n", __raw_readl(S3C2410_GSTATUS3));
S3C_PMDBG("GSTATUS4 0x%08x\n", __raw_readl(S3C2410_GSTATUS4));
if (machine_is_h1940()) {
void *base = phys_to_virt(H1940_SUSPEND_CHECK);
unsigned long ptr;
unsigned long calc = 0;
/* generate check for the bootloader to check on resume */
for (ptr = 0; ptr < 0x40000; ptr += 0x400)
calc += __raw_readl(base+ptr);
__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
}
/* RX3715 and RX1950 use similar to H1940 code and the
* same offsets for resume and checksum pointers */
if (machine_is_rx3715() || machine_is_rx1950()) {
void *base = phys_to_virt(H1940_SUSPEND_CHECK);
unsigned long ptr;
unsigned long calc = 0;
/* generate check for the bootloader to check on resume */
for (ptr = 0; ptr < 0x40000; ptr += 0x4)
calc += __raw_readl(base+ptr);
__raw_writel(calc, phys_to_virt(H1940_SUSPEND_CHECKSUM));
}
if (machine_is_aml_m5900()) {
gpio_request_one(S3C2410_GPF(2), GPIOF_OUT_INIT_HIGH, NULL);
gpio_free(S3C2410_GPF(2));
}
if (machine_is_rx1950()) {
/* According to S3C2442 user's manual, page 7-17,
* when the system is operating in NAND boot mode,
* the hardware pin configuration - EINT[23:21] –
* must be set as input for starting up after
* wakeup from sleep mode
*/
s3c_gpio_cfgpin(S3C2410_GPG(13), S3C2410_GPIO_INPUT);
s3c_gpio_cfgpin(S3C2410_GPG(14), S3C2410_GPIO_INPUT);
s3c_gpio_cfgpin(S3C2410_GPG(15), S3C2410_GPIO_INPUT);
}
}
static void s3c2410_pm_resume(void)
{
unsigned long tmp;
/* unset the return-from-sleep flag, to ensure reset */
tmp = __raw_readl(S3C2410_GSTATUS2);
tmp &= S3C2410_GSTATUS2_OFFRESET;
__raw_writel(tmp, S3C2410_GSTATUS2);
if (machine_is_aml_m5900()) {
gpio_request_one(S3C2410_GPF(2), GPIOF_OUT_INIT_LOW, NULL);
gpio_free(S3C2410_GPF(2));
}
}
struct syscore_ops s3c2410_pm_syscore_ops = {
.resume = s3c2410_pm_resume,
};
static int s3c2410_pm_add(struct device *dev, struct subsys_interface *sif)
{
pm_cpu_prep = s3c2410_pm_prepare;
pm_cpu_sleep = s3c2410_cpu_suspend;
return 0;
}
#if defined(CONFIG_CPU_S3C2410)
static struct subsys_interface s3c2410_pm_interface = {
.name = "s3c2410_pm",
.subsys = &s3c2410_subsys,
.add_dev = s3c2410_pm_add,
};
/* register ourselves */
static int __init s3c2410_pm_drvinit(void)
{
return subsys_interface_register(&s3c2410_pm_interface);
}
arch_initcall(s3c2410_pm_drvinit);
static struct subsys_interface s3c2410a_pm_interface = {
.name = "s3c2410a_pm",
.subsys = &s3c2410a_subsys,
.add_dev = s3c2410_pm_add,
};
static int __init s3c2410a_pm_drvinit(void)
{
return subsys_interface_register(&s3c2410a_pm_interface);
}
arch_initcall(s3c2410a_pm_drvinit);
#endif
#if defined(CONFIG_CPU_S3C2440)
static struct subsys_interface s3c2440_pm_interface = {
.name = "s3c2440_pm",
.subsys = &s3c2440_subsys,
.add_dev = s3c2410_pm_add,
};
static int __init s3c2440_pm_drvinit(void)
{
return subsys_interface_register(&s3c2440_pm_interface);
}
arch_initcall(s3c2440_pm_drvinit);
#endif
#if defined(CONFIG_CPU_S3C2442)
static struct subsys_interface s3c2442_pm_interface = {
.name = "s3c2442_pm",
.subsys = &s3c2442_subsys,
.add_dev = s3c2410_pm_add,
};
static int __init s3c2442_pm_drvinit(void)
{
return subsys_interface_register(&s3c2442_pm_interface);
}
arch_initcall(s3c2442_pm_drvinit);
#endif
|
