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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/* linux/arch/arm/plat-s3c64xx/pm.c
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C64XX CPU PM support.
*
* 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/serial_core.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <mach/map.h>
#include <mach/irqs.h>
#include <plat/pm.h>
#include <plat/wakeup-mask.h>
#include <mach/regs-sys.h>
#include <mach/regs-gpio.h>
#include <mach/regs-clock.h>
#include <mach/regs-syscon-power.h>
#include <mach/regs-gpio-memport.h>
#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
void s3c_pm_debug_smdkled(u32 set, u32 clear)
{
unsigned long flags;
int i;
local_irq_save(flags);
for (i = 0; i < 4; i++) {
if (clear & (1 << i))
gpio_set_value(S3C64XX_GPN(12 + i), 0);
if (set & (1 << i))
gpio_set_value(S3C64XX_GPN(12 + i), 1);
}
local_irq_restore(flags);
}
#endif
static struct sleep_save core_save[] = {
SAVE_ITEM(S3C_APLL_LOCK),
SAVE_ITEM(S3C_MPLL_LOCK),
SAVE_ITEM(S3C_EPLL_LOCK),
SAVE_ITEM(S3C_CLK_SRC),
SAVE_ITEM(S3C_CLK_DIV0),
SAVE_ITEM(S3C_CLK_DIV1),
SAVE_ITEM(S3C_CLK_DIV2),
SAVE_ITEM(S3C_CLK_OUT),
SAVE_ITEM(S3C_HCLK_GATE),
SAVE_ITEM(S3C_PCLK_GATE),
SAVE_ITEM(S3C_SCLK_GATE),
SAVE_ITEM(S3C_MEM0_GATE),
SAVE_ITEM(S3C_EPLL_CON1),
SAVE_ITEM(S3C_EPLL_CON0),
SAVE_ITEM(S3C64XX_MEM0DRVCON),
SAVE_ITEM(S3C64XX_MEM1DRVCON),
#ifndef CONFIG_CPU_FREQ
SAVE_ITEM(S3C_APLL_CON),
SAVE_ITEM(S3C_MPLL_CON),
#endif
};
static struct sleep_save misc_save[] = {
SAVE_ITEM(S3C64XX_AHB_CON0),
SAVE_ITEM(S3C64XX_AHB_CON1),
SAVE_ITEM(S3C64XX_AHB_CON2),
SAVE_ITEM(S3C64XX_SPCON),
SAVE_ITEM(S3C64XX_MEM0CONSTOP),
SAVE_ITEM(S3C64XX_MEM1CONSTOP),
SAVE_ITEM(S3C64XX_MEM0CONSLP0),
SAVE_ITEM(S3C64XX_MEM0CONSLP1),
SAVE_ITEM(S3C64XX_MEM1CONSLP),
};
void s3c_pm_configure_extint(void)
{
__raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK);
}
void s3c_pm_restore_core(void)
{
__raw_writel(0, S3C64XX_EINT_MASK);
s3c_pm_debug_smdkled(1 << 2, 0);
s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
}
void s3c_pm_save_core(void)
{
s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
}
/* since both s3c6400 and s3c6410 share the same sleep pm calls, we
* put the per-cpu code in here until any new cpu comes along and changes
* this.
*/
static int s3c64xx_cpu_suspend(unsigned long arg)
{
unsigned long tmp;
/* set our standby method to sleep */
tmp = __raw_readl(S3C64XX_PWR_CFG);
tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
tmp |= S3C64XX_PWRCFG_CFG_WFI_SLEEP;
__raw_writel(tmp, S3C64XX_PWR_CFG);
/* clear any old wakeup */
__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT),
S3C64XX_WAKEUP_STAT);
/* set the LED state to 0110 over sleep */
s3c_pm_debug_smdkled(3 << 1, 0xf);
/* 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"
"mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
/* we should never get past here */
panic("sleep resumed to originator?");
}
/* mapping of interrupts to parts of the wakeup mask */
static struct samsung_wakeup_mask wake_irqs[] = {
{ .irq = IRQ_RTC_ALARM, .bit = S3C64XX_PWRCFG_RTC_ALARM_DISABLE, },
{ .irq = IRQ_RTC_TIC, .bit = S3C64XX_PWRCFG_RTC_TICK_DISABLE, },
{ .irq = IRQ_PENDN, .bit = S3C64XX_PWRCFG_TS_DISABLE, },
{ .irq = IRQ_HSMMC0, .bit = S3C64XX_PWRCFG_MMC0_DISABLE, },
{ .irq = IRQ_HSMMC1, .bit = S3C64XX_PWRCFG_MMC1_DISABLE, },
{ .irq = IRQ_HSMMC2, .bit = S3C64XX_PWRCFG_MMC2_DISABLE, },
{ .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_BATF_DISABLE},
{ .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_MSM_DISABLE },
{ .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_HSI_DISABLE },
{ .irq = NO_WAKEUP_IRQ, .bit = S3C64XX_PWRCFG_MSM_DISABLE },
};
static void s3c64xx_pm_prepare(void)
{
samsung_sync_wakemask(S3C64XX_PWR_CFG,
wake_irqs, ARRAY_SIZE(wake_irqs));
/* store address of resume. */
__raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0);
/* ensure previous wakeup state is cleared before sleeping */
__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT);
}
static int s3c64xx_pm_init(void)
{
pm_cpu_prep = s3c64xx_pm_prepare;
pm_cpu_sleep = s3c64xx_cpu_suspend;
pm_uart_udivslot = 1;
#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
gpio_request(S3C64XX_GPN(12), "DEBUG_LED0");
gpio_request(S3C64XX_GPN(13), "DEBUG_LED1");
gpio_request(S3C64XX_GPN(14), "DEBUG_LED2");
gpio_request(S3C64XX_GPN(15), "DEBUG_LED3");
gpio_direction_output(S3C64XX_GPN(12), 0);
gpio_direction_output(S3C64XX_GPN(13), 0);
gpio_direction_output(S3C64XX_GPN(14), 0);
gpio_direction_output(S3C64XX_GPN(15), 0);
#endif
return 0;
}
arch_initcall(s3c64xx_pm_init);
|
