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1da177e4 LT |
1 | /* |
2 | * pm.h - Power management interface | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | ||
21 | #ifndef _LINUX_PM_H | |
22 | #define _LINUX_PM_H | |
23 | ||
24 | #ifdef __KERNEL__ | |
25 | ||
26 | #include <linux/config.h> | |
27 | #include <linux/list.h> | |
28 | #include <asm/atomic.h> | |
29 | ||
30 | /* | |
31 | * Power management requests... these are passed to pm_send_all() and friends. | |
32 | * | |
33 | * these functions are old and deprecated, see below. | |
34 | */ | |
35 | typedef int __bitwise pm_request_t; | |
36 | ||
37 | #define PM_SUSPEND ((__force pm_request_t) 1) /* enter D1-D3 */ | |
38 | #define PM_RESUME ((__force pm_request_t) 2) /* enter D0 */ | |
39 | ||
40 | ||
41 | /* | |
42 | * Device types... these are passed to pm_register | |
43 | */ | |
44 | typedef int __bitwise pm_dev_t; | |
45 | ||
46 | #define PM_UNKNOWN_DEV ((__force pm_dev_t) 0) /* generic */ | |
47 | #define PM_SYS_DEV ((__force pm_dev_t) 1) /* system device (fan, KB controller, ...) */ | |
48 | #define PM_PCI_DEV ((__force pm_dev_t) 2) /* PCI device */ | |
49 | #define PM_USB_DEV ((__force pm_dev_t) 3) /* USB device */ | |
50 | #define PM_SCSI_DEV ((__force pm_dev_t) 4) /* SCSI device */ | |
51 | #define PM_ISA_DEV ((__force pm_dev_t) 5) /* ISA device */ | |
52 | #define PM_MTD_DEV ((__force pm_dev_t) 6) /* Memory Technology Device */ | |
53 | ||
54 | /* | |
55 | * System device hardware ID (PnP) values | |
56 | */ | |
57 | enum | |
58 | { | |
59 | PM_SYS_UNKNOWN = 0x00000000, /* generic */ | |
60 | PM_SYS_KBC = 0x41d00303, /* keyboard controller */ | |
61 | PM_SYS_COM = 0x41d00500, /* serial port */ | |
62 | PM_SYS_IRDA = 0x41d00510, /* IRDA controller */ | |
63 | PM_SYS_FDC = 0x41d00700, /* floppy controller */ | |
64 | PM_SYS_VGA = 0x41d00900, /* VGA controller */ | |
65 | PM_SYS_PCMCIA = 0x41d00e00, /* PCMCIA controller */ | |
66 | }; | |
67 | ||
68 | /* | |
69 | * Device identifier | |
70 | */ | |
71 | #define PM_PCI_ID(dev) ((dev)->bus->number << 16 | (dev)->devfn) | |
72 | ||
73 | /* | |
74 | * Request handler callback | |
75 | */ | |
76 | struct pm_dev; | |
77 | ||
78 | typedef int (*pm_callback)(struct pm_dev *dev, pm_request_t rqst, void *data); | |
79 | ||
80 | /* | |
81 | * Dynamic device information | |
82 | */ | |
83 | struct pm_dev | |
84 | { | |
85 | pm_dev_t type; | |
86 | unsigned long id; | |
87 | pm_callback callback; | |
88 | void *data; | |
89 | ||
90 | unsigned long flags; | |
91 | unsigned long state; | |
92 | unsigned long prev_state; | |
93 | ||
94 | struct list_head entry; | |
95 | }; | |
96 | ||
97 | #ifdef CONFIG_PM | |
98 | ||
99 | extern int pm_active; | |
100 | ||
101 | #define PM_IS_ACTIVE() (pm_active != 0) | |
102 | ||
103 | /* | |
104 | * Register a device with power management | |
105 | */ | |
106 | struct pm_dev __deprecated *pm_register(pm_dev_t type, unsigned long id, pm_callback callback); | |
107 | ||
108 | /* | |
109 | * Unregister a device with power management | |
110 | */ | |
111 | void __deprecated pm_unregister(struct pm_dev *dev); | |
112 | ||
113 | /* | |
114 | * Unregister all devices with matching callback | |
115 | */ | |
116 | void __deprecated pm_unregister_all(pm_callback callback); | |
117 | ||
118 | /* | |
119 | * Send a request to all devices | |
120 | */ | |
121 | int __deprecated pm_send_all(pm_request_t rqst, void *data); | |
122 | ||
123 | #else /* CONFIG_PM */ | |
124 | ||
125 | #define PM_IS_ACTIVE() 0 | |
126 | ||
127 | static inline struct pm_dev *pm_register(pm_dev_t type, | |
128 | unsigned long id, | |
129 | pm_callback callback) | |
130 | { | |
131 | return NULL; | |
132 | } | |
133 | ||
134 | static inline void pm_unregister(struct pm_dev *dev) {} | |
135 | ||
136 | static inline void pm_unregister_all(pm_callback callback) {} | |
137 | ||
138 | static inline int pm_send_all(pm_request_t rqst, void *data) | |
139 | { | |
140 | return 0; | |
141 | } | |
142 | ||
143 | #endif /* CONFIG_PM */ | |
144 | ||
145 | /* Functions above this comment are list-based old-style power | |
146 | * managment. Please avoid using them. */ | |
147 | ||
148 | /* | |
149 | * Callbacks for platform drivers to implement. | |
150 | */ | |
151 | extern void (*pm_idle)(void); | |
152 | extern void (*pm_power_off)(void); | |
153 | ||
154 | typedef int __bitwise suspend_state_t; | |
155 | ||
156 | #define PM_SUSPEND_ON ((__force suspend_state_t) 0) | |
157 | #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1) | |
158 | #define PM_SUSPEND_MEM ((__force suspend_state_t) 3) | |
159 | #define PM_SUSPEND_DISK ((__force suspend_state_t) 4) | |
160 | #define PM_SUSPEND_MAX ((__force suspend_state_t) 5) | |
161 | ||
162 | typedef int __bitwise suspend_disk_method_t; | |
163 | ||
164 | #define PM_DISK_FIRMWARE ((__force suspend_disk_method_t) 1) | |
165 | #define PM_DISK_PLATFORM ((__force suspend_disk_method_t) 2) | |
166 | #define PM_DISK_SHUTDOWN ((__force suspend_disk_method_t) 3) | |
167 | #define PM_DISK_REBOOT ((__force suspend_disk_method_t) 4) | |
168 | #define PM_DISK_MAX ((__force suspend_disk_method_t) 5) | |
169 | ||
170 | struct pm_ops { | |
171 | suspend_disk_method_t pm_disk_mode; | |
172 | int (*prepare)(suspend_state_t state); | |
173 | int (*enter)(suspend_state_t state); | |
174 | int (*finish)(suspend_state_t state); | |
175 | }; | |
176 | ||
177 | extern void pm_set_ops(struct pm_ops *); | |
178 | ||
179 | extern int pm_suspend(suspend_state_t state); | |
180 | ||
181 | ||
182 | /* | |
183 | * Device power management | |
184 | */ | |
185 | ||
186 | struct device; | |
187 | ||
188 | typedef u32 __bitwise pm_message_t; | |
189 | ||
190 | /* | |
191 | * There are 4 important states driver can be in: | |
192 | * ON -- driver is working | |
193 | * FREEZE -- stop operations and apply whatever policy is applicable to a suspended driver | |
194 | * of that class, freeze queues for block like IDE does, drop packets for | |
195 | * ethernet, etc... stop DMA engine too etc... so a consistent image can be | |
196 | * saved; but do not power any hardware down. | |
197 | * SUSPEND - like FREEZE, but hardware is doing as much powersaving as possible. Roughly | |
198 | * pci D3. | |
199 | * | |
200 | * Unfortunately, current drivers only recognize numeric values 0 (ON) and 3 (SUSPEND). | |
201 | * We'll need to fix the drivers. So yes, putting 3 to all diferent defines is intentional, | |
202 | * and will go away as soon as drivers are fixed. Also note that typedef is neccessary, | |
203 | * we'll probably want to switch to | |
204 | * typedef struct pm_message_t { int event; int flags; } pm_message_t | |
205 | * or something similar soon. | |
206 | */ | |
207 | ||
208 | #define PMSG_FREEZE ((__force pm_message_t) 3) | |
209 | #define PMSG_SUSPEND ((__force pm_message_t) 3) | |
210 | #define PMSG_ON ((__force pm_message_t) 0) | |
211 | ||
212 | struct dev_pm_info { | |
213 | pm_message_t power_state; | |
214 | #ifdef CONFIG_PM | |
215 | pm_message_t prev_state; | |
216 | void * saved_state; | |
217 | atomic_t pm_users; | |
218 | struct device * pm_parent; | |
219 | struct list_head entry; | |
220 | #endif | |
221 | }; | |
222 | ||
223 | extern void device_pm_set_parent(struct device * dev, struct device * parent); | |
224 | ||
225 | extern int device_suspend(pm_message_t state); | |
226 | extern int device_power_down(pm_message_t state); | |
227 | extern void device_power_up(void); | |
228 | extern void device_resume(void); | |
229 | ||
230 | ||
231 | #endif /* __KERNEL__ */ | |
232 | ||
233 | #endif /* _LINUX_PM_H */ |