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1394f032 BW |
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 | ||
35 | #include <linux/pm.h> | |
36 | #include <linux/sched.h> | |
37 | #include <linux/proc_fs.h> | |
38 | ||
39 | #include <asm/io.h> | |
40 | #include <asm/dpmc.h> | |
41 | #include <asm/irq.h> | |
42 | ||
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 | ||
80 | bfin_write_SIC_IWR(IWR_ENABLE_ALL); | |
81 | ||
82 | local_irq_restore(flags); | |
83 | } | |
84 | #endif | |
85 | ||
86 | #if defined(CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR) | |
87 | sleep_deeper(CONFIG_PM_WAKEUP_SIC_IWR); | |
88 | bfin_write_SIC_IWR(IWR_ENABLE_ALL); | |
89 | #endif /* CONFIG_PM_WAKEUP_GPIO_BY_SIC_IWR */ | |
90 | } | |
91 | ||
92 | ||
93 | /* | |
94 | * bfin_pm_prepare - Do preliminary suspend work. | |
95 | * @state: suspend state we're entering. | |
96 | * | |
97 | */ | |
98 | static int bfin_pm_prepare(suspend_state_t state) | |
99 | { | |
100 | int error = 0; | |
101 | ||
102 | switch (state) { | |
103 | case PM_SUSPEND_STANDBY: | |
104 | break; | |
1394f032 | 105 | |
9d7b6677 | 106 | case PM_SUSPEND_MEM: |
1394f032 BW |
107 | return -ENOTSUPP; |
108 | ||
109 | default: | |
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | return error; | |
114 | } | |
115 | ||
116 | /* | |
117 | * bfin_pm_enter - Actually enter a sleep state. | |
118 | * @state: State we're entering. | |
119 | * | |
120 | */ | |
121 | static int bfin_pm_enter(suspend_state_t state) | |
122 | { | |
123 | switch (state) { | |
124 | case PM_SUSPEND_STANDBY: | |
125 | bfin_pm_suspend_standby_enter(); | |
126 | break; | |
1394f032 | 127 | |
9d7b6677 | 128 | case PM_SUSPEND_MEM: |
1394f032 BW |
129 | return -ENOTSUPP; |
130 | ||
131 | default: | |
132 | return -EINVAL; | |
133 | } | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | /* | |
139 | * bfin_pm_finish - Finish up suspend sequence. | |
140 | * @state: State we're coming out of. | |
141 | * | |
142 | * This is called after we wake back up (or if entering the sleep state | |
143 | * failed). | |
144 | */ | |
145 | static int bfin_pm_finish(suspend_state_t state) | |
146 | { | |
147 | switch (state) { | |
148 | case PM_SUSPEND_STANDBY: | |
149 | break; | |
150 | ||
151 | case PM_SUSPEND_MEM: | |
152 | return -ENOTSUPP; | |
153 | ||
1394f032 BW |
154 | default: |
155 | return -EINVAL; | |
156 | } | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | struct pm_ops bfin_pm_ops = { | |
1394f032 BW |
162 | .prepare = bfin_pm_prepare, |
163 | .enter = bfin_pm_enter, | |
164 | .finish = bfin_pm_finish, | |
165 | }; | |
166 | ||
167 | static int __init bfin_pm_init(void) | |
168 | { | |
169 | pm_set_ops(&bfin_pm_ops); | |
170 | return 0; | |
171 | } | |
172 | ||
173 | __initcall(bfin_pm_init); |