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
|
/*
* File: arch/blackfin/mach-common/pm.c
* Based on: arm/mach-omap/pm.c
* Author: Cliff Brake <cbrake@accelent.com> Copyright (c) 2001
*
* Created: 2001
* Description: Power management for the bfin
*
* Modified: Nicolas Pitre - PXA250 support
* Copyright (c) 2002 Monta Vista Software, Inc.
* David Singleton - OMAP1510
* Copyright (c) 2002 Monta Vista Software, Inc.
* Dirk Behme <dirk.behme@de.bosch.com> - OMAP1510/1610
* Copyright 2004
* Copyright 2004-2006 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/suspend.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <asm/dpmc.h>
#include <asm/gpio.h>
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_H
#define WAKEUP_TYPE PM_WAKE_HIGH
#endif
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_L
#define WAKEUP_TYPE PM_WAKE_LOW
#endif
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_F
#define WAKEUP_TYPE PM_WAKE_FALLING
#endif
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_R
#define WAKEUP_TYPE PM_WAKE_RISING
#endif
#ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_B
#define WAKEUP_TYPE PM_WAKE_BOTH_EDGES
#endif
void bfin_pm_suspend_standby_enter(void)
{
#ifdef CONFIG_PM_WAKEUP_BY_GPIO
gpio_pm_wakeup_request(CONFIG_PM_WAKEUP_GPIO_NUMBER, WAKEUP_TYPE);
#endif
#if defined(CONFIG_PM_WAKEUP_BY_GPIO) || defined(CONFIG_PM_WAKEUP_GPIO_API)
{
u32 flags;
local_irq_save(flags);
sleep_deeper(gpio_pm_setup()); /*Goto Sleep*/
gpio_pm_restore();
bfin_write_SIC_IWR(IWR_ENABLE_ALL);
local_irq_restore(flags);
}
#endif
#if defined(CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR)
sleep_deeper(CONFIG_PM_WAKEUP_SIC_IWR);
bfin_write_SIC_IWR(IWR_ENABLE_ALL);
#endif /* CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR */
}
/*
* bfin_pm_valid - Tell the PM core that we only support the standby sleep
* state
* @state: suspend state we're checking.
*
*/
static int bfin_pm_valid(suspend_state_t state)
{
return (state == PM_SUSPEND_STANDBY);
}
/*
* bfin_pm_enter - Actually enter a sleep state.
* @state: State we're entering.
*
*/
static int bfin_pm_enter(suspend_state_t state)
{
switch (state) {
case PM_SUSPEND_STANDBY:
bfin_pm_suspend_standby_enter();
break;
case PM_SUSPEND_MEM:
return -ENOTSUPP;
default:
return -EINVAL;
}
return 0;
}
struct platform_suspend_ops bfin_pm_ops = {
.enter = bfin_pm_enter,
.valid = bfin_pm_valid,
};
static int __init bfin_pm_init(void)
{
suspend_set_ops(&bfin_pm_ops);
return 0;
}
__initcall(bfin_pm_init);
|
