2 * pm.h - Power management interface
4 * Copyright (C) 2000 Andrew Henroid
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.
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.
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
26 #include <linux/config.h>
27 #include <linux/list.h>
28 #include <asm/atomic.h>
31 * Power management requests... these are passed to pm_send_all() and friends.
33 * these functions are old and deprecated, see below.
35 typedef int __bitwise pm_request_t;
37 #define PM_SUSPEND ((__force pm_request_t) 1) /* enter D1-D3 */
38 #define PM_RESUME ((__force pm_request_t) 2) /* enter D0 */
42 * Device types... these are passed to pm_register
44 typedef int __bitwise pm_dev_t;
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 */
55 * System device hardware ID (PnP) values
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 */
71 #define PM_PCI_ID(dev) ((dev)->bus->number << 16 | (dev)->devfn)
74 * Request handler callback
78 typedef int (*pm_callback)(struct pm_dev *dev, pm_request_t rqst, void *data);
81 * Dynamic device information
92 unsigned long prev_state;
94 struct list_head entry;
101 #define PM_IS_ACTIVE() (pm_active != 0)
104 * Register a device with power management
106 struct pm_dev __deprecated *
107 pm_register(pm_dev_t type, unsigned long id, pm_callback callback);
110 * Unregister a device with power management
112 void __deprecated pm_unregister(struct pm_dev *dev);
115 * Unregister all devices with matching callback
117 void __deprecated pm_unregister_all(pm_callback callback);
120 * Send a request to all devices
122 int __deprecated pm_send_all(pm_request_t rqst, void *data);
124 #else /* CONFIG_PM */
126 #define PM_IS_ACTIVE() 0
128 static inline struct pm_dev *pm_register(pm_dev_t type,
130 pm_callback callback)
135 static inline void pm_unregister(struct pm_dev *dev) {}
137 static inline void pm_unregister_all(pm_callback callback) {}
139 static inline int pm_send_all(pm_request_t rqst, void *data)
144 #endif /* CONFIG_PM */
146 /* Functions above this comment are list-based old-style power
147 * managment. Please avoid using them. */
150 * Callbacks for platform drivers to implement.
152 extern void (*pm_idle)(void);
153 extern void (*pm_power_off)(void);
155 typedef int __bitwise suspend_state_t;
157 #define PM_SUSPEND_ON ((__force suspend_state_t) 0)
158 #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)
159 #define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
160 #define PM_SUSPEND_DISK ((__force suspend_state_t) 4)
161 #define PM_SUSPEND_MAX ((__force suspend_state_t) 5)
163 typedef int __bitwise suspend_disk_method_t;
165 #define PM_DISK_FIRMWARE ((__force suspend_disk_method_t) 1)
166 #define PM_DISK_PLATFORM ((__force suspend_disk_method_t) 2)
167 #define PM_DISK_SHUTDOWN ((__force suspend_disk_method_t) 3)
168 #define PM_DISK_REBOOT ((__force suspend_disk_method_t) 4)
169 #define PM_DISK_MAX ((__force suspend_disk_method_t) 5)
172 suspend_disk_method_t pm_disk_mode;
173 int (*valid)(suspend_state_t state);
174 int (*prepare)(suspend_state_t state);
175 int (*enter)(suspend_state_t state);
176 int (*finish)(suspend_state_t state);
179 extern void pm_set_ops(struct pm_ops *);
180 extern struct pm_ops *pm_ops;
181 extern int pm_suspend(suspend_state_t state);
185 * Device power management
190 typedef struct pm_message {
195 * There are 4 important states driver can be in:
196 * ON -- driver is working
197 * FREEZE -- stop operations and apply whatever policy is applicable to a
198 * suspended driver of that class, freeze queues for block like IDE
199 * does, drop packets for ethernet, etc... stop DMA engine too etc...
200 * so a consistent image can be saved; but do not power any hardware
202 * SUSPEND - like FREEZE, but hardware is doing as much powersaving as
203 * possible. Roughly pci D3.
205 * Unfortunately, current drivers only recognize numeric values 0 (ON) and 3
206 * (SUSPEND). We'll need to fix the drivers. So yes, putting 3 to all different
207 * defines is intentional, and will go away as soon as drivers are fixed. Also
208 * note that typedef is neccessary, we'll probably want to switch to
209 * typedef struct pm_message_t { int event; int flags; } pm_message_t
210 * or something similar soon.
213 #define PM_EVENT_ON 0
214 #define PM_EVENT_FREEZE 1
215 #define PM_EVENT_SUSPEND 2
217 #define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, })
218 #define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, })
219 #define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
222 pm_message_t power_state;
223 unsigned can_wakeup:1;
225 unsigned should_wakeup:1;
226 pm_message_t prev_state;
228 struct device * pm_parent;
229 struct list_head entry;
233 extern void device_pm_set_parent(struct device * dev, struct device * parent);
235 extern int device_power_down(pm_message_t state);
236 extern void device_power_up(void);
237 extern void device_resume(void);
240 extern int device_suspend(pm_message_t state);
242 #define device_set_wakeup_enable(dev,val) \
243 ((dev)->power.should_wakeup = !!(val))
244 #define device_may_wakeup(dev) \
245 (device_can_wakeup(dev) && (dev)->power.should_wakeup)
247 extern int dpm_runtime_suspend(struct device *, pm_message_t);
248 extern void dpm_runtime_resume(struct device *);
250 #else /* !CONFIG_PM */
252 static inline int device_suspend(pm_message_t state)
257 #define device_set_wakeup_enable(dev,val) do{}while(0)
258 #define device_may_wakeup(dev) (0)
260 static inline int dpm_runtime_suspend(struct device * dev, pm_message_t state)
265 static inline void dpm_runtime_resume(struct device * dev)
272 /* changes to device_may_wakeup take effect on the next pm state change.
273 * by default, devices should wakeup if they can.
275 #define device_can_wakeup(dev) \
276 ((dev)->power.can_wakeup)
277 #define device_init_wakeup(dev,val) \
279 device_can_wakeup(dev) = !!(val); \
280 device_set_wakeup_enable(dev,val); \
283 #endif /* __KERNEL__ */
285 #endif /* _LINUX_PM_H */