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1 | /* |
2 | * File: arch/blackfin/mach-common/pm.c | |
3 | * Based on: arm/mach-omap/pm.c | |
4 | * Author: Cliff Brake <cbrake@accelent.com> Copyright (c) 2001 | |
5 | * | |
6 | * Created: 2001 | |
7 | * Description: Power management for the bfin | |
8 | * | |
9 | * Modified: Nicolas Pitre - PXA250 support | |
10 | * Copyright (c) 2002 Monta Vista Software, Inc. | |
11 | * David Singleton - OMAP1510 | |
12 | * Copyright (c) 2002 Monta Vista Software, Inc. | |
13 | * Dirk Behme <dirk.behme@de.bosch.com> - OMAP1510/1610 | |
14 | * Copyright 2004 | |
15 | * Copyright 2004-2006 Analog Devices Inc. | |
16 | * | |
17 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
18 | * | |
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
23 | * | |
24 | * This program is distributed in the hope that it will be useful, | |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License | |
30 | * along with this program; if not, see the file COPYING, or write | |
31 | * to the Free Software Foundation, Inc., | |
32 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
33 | */ | |
34 | ||
95d9ffbe | 35 | #include <linux/suspend.h> |
1394f032 BW |
36 | #include <linux/sched.h> |
37 | #include <linux/proc_fs.h> | |
1f83b8f1 MF |
38 | #include <linux/io.h> |
39 | #include <linux/irq.h> | |
1394f032 | 40 | |
1394f032 | 41 | #include <asm/dpmc.h> |
fd92348e | 42 | #include <asm/gpio.h> |
1394f032 BW |
43 | |
44 | #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_H | |
45 | #define WAKEUP_TYPE PM_WAKE_HIGH | |
46 | #endif | |
47 | ||
48 | #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_L | |
49 | #define WAKEUP_TYPE PM_WAKE_LOW | |
50 | #endif | |
51 | ||
52 | #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_F | |
53 | #define WAKEUP_TYPE PM_WAKE_FALLING | |
54 | #endif | |
55 | ||
56 | #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_R | |
57 | #define WAKEUP_TYPE PM_WAKE_RISING | |
58 | #endif | |
59 | ||
60 | #ifdef CONFIG_PM_WAKEUP_GPIO_POLAR_EDGE_B | |
61 | #define WAKEUP_TYPE PM_WAKE_BOTH_EDGES | |
62 | #endif | |
63 | ||
64 | void bfin_pm_suspend_standby_enter(void) | |
65 | { | |
66 | #ifdef CONFIG_PM_WAKEUP_BY_GPIO | |
67 | gpio_pm_wakeup_request(CONFIG_PM_WAKEUP_GPIO_NUMBER, WAKEUP_TYPE); | |
68 | #endif | |
69 | ||
70 | #if defined(CONFIG_PM_WAKEUP_BY_GPIO) || defined(CONFIG_PM_WAKEUP_GPIO_API) | |
71 | { | |
72 | u32 flags; | |
73 | ||
74 | local_irq_save(flags); | |
75 | ||
76 | sleep_deeper(gpio_pm_setup()); /*Goto Sleep*/ | |
77 | ||
78 | gpio_pm_restore(); | |
79 | ||
fb5f0049 SZ |
80 | #if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) |
81 | bfin_write_SIC_IWR0(IWR_ENABLE_ALL); | |
82 | bfin_write_SIC_IWR1(IWR_ENABLE_ALL); | |
83 | # ifdef CONFIG_BF54x | |
84 | bfin_write_SIC_IWR2(IWR_ENABLE_ALL); | |
85 | # endif | |
86 | #else | |
1394f032 | 87 | bfin_write_SIC_IWR(IWR_ENABLE_ALL); |
fb5f0049 | 88 | #endif |
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89 | |
90 | local_irq_restore(flags); | |
91 | } | |
92 | #endif | |
93 | ||
94 | #if defined(CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR) | |
95 | sleep_deeper(CONFIG_PM_WAKEUP_SIC_IWR); | |
fb5f0049 SZ |
96 | # if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) |
97 | bfin_write_SIC_IWR0(IWR_ENABLE_ALL); | |
98 | bfin_write_SIC_IWR1(IWR_ENABLE_ALL); | |
99 | # ifdef CONFIG_BF54x | |
100 | bfin_write_SIC_IWR2(IWR_ENABLE_ALL); | |
101 | # endif | |
102 | # else | |
1394f032 | 103 | bfin_write_SIC_IWR(IWR_ENABLE_ALL); |
fb5f0049 | 104 | # endif |
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105 | #endif /* CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR */ |
106 | } | |
107 | ||
1394f032 | 108 | /* |
e6c5eb95 RW |
109 | * bfin_pm_valid - Tell the PM core that we only support the standby sleep |
110 | * state | |
111 | * @state: suspend state we're checking. | |
1394f032 BW |
112 | * |
113 | */ | |
e6c5eb95 | 114 | static int bfin_pm_valid(suspend_state_t state) |
1394f032 | 115 | { |
e6c5eb95 | 116 | return (state == PM_SUSPEND_STANDBY); |
1394f032 BW |
117 | } |
118 | ||
119 | /* | |
120 | * bfin_pm_enter - Actually enter a sleep state. | |
121 | * @state: State we're entering. | |
122 | * | |
123 | */ | |
124 | static int bfin_pm_enter(suspend_state_t state) | |
125 | { | |
126 | switch (state) { | |
127 | case PM_SUSPEND_STANDBY: | |
128 | bfin_pm_suspend_standby_enter(); | |
129 | break; | |
1394f032 | 130 | |
9d7b6677 | 131 | case PM_SUSPEND_MEM: |
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132 | return -ENOTSUPP; |
133 | ||
134 | default: | |
135 | return -EINVAL; | |
136 | } | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
26398a70 | 141 | struct platform_suspend_ops bfin_pm_ops = { |
1394f032 | 142 | .enter = bfin_pm_enter, |
4bbd10fd | 143 | .valid = bfin_pm_valid, |
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144 | }; |
145 | ||
146 | static int __init bfin_pm_init(void) | |
147 | { | |
26398a70 | 148 | suspend_set_ops(&bfin_pm_ops); |
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149 | return 0; |
150 | } | |
151 | ||
152 | __initcall(bfin_pm_init); |