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
;
97 /* Functions above this comment are list-based old-style power
98 * managment. Please avoid using them. */
101 * Callbacks for platform drivers to implement.
103 extern void (*pm_idle
)(void);
104 extern void (*pm_power_off
)(void);
106 typedef int __bitwise suspend_state_t
;
108 #define PM_SUSPEND_ON ((__force suspend_state_t) 0)
109 #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)
110 #define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
111 #define PM_SUSPEND_DISK ((__force suspend_state_t) 4)
112 #define PM_SUSPEND_MAX ((__force suspend_state_t) 5)
114 typedef int __bitwise suspend_disk_method_t
;
116 #define PM_DISK_FIRMWARE ((__force suspend_disk_method_t) 1)
117 #define PM_DISK_PLATFORM ((__force suspend_disk_method_t) 2)
118 #define PM_DISK_SHUTDOWN ((__force suspend_disk_method_t) 3)
119 #define PM_DISK_REBOOT ((__force suspend_disk_method_t) 4)
120 #define PM_DISK_MAX ((__force suspend_disk_method_t) 5)
123 suspend_disk_method_t pm_disk_mode
;
124 int (*valid
)(suspend_state_t state
);
125 int (*prepare
)(suspend_state_t state
);
126 int (*enter
)(suspend_state_t state
);
127 int (*finish
)(suspend_state_t state
);
130 extern void pm_set_ops(struct pm_ops
*);
131 extern struct pm_ops
*pm_ops
;
132 extern int pm_suspend(suspend_state_t state
);
136 * Device power management
141 typedef struct pm_message
{
146 * There are 4 important states driver can be in:
147 * ON -- driver is working
148 * FREEZE -- stop operations and apply whatever policy is applicable to a
149 * suspended driver of that class, freeze queues for block like IDE
150 * does, drop packets for ethernet, etc... stop DMA engine too etc...
151 * so a consistent image can be saved; but do not power any hardware
153 * SUSPEND - like FREEZE, but hardware is doing as much powersaving as
154 * possible. Roughly pci D3.
156 * Unfortunately, current drivers only recognize numeric values 0 (ON) and 3
157 * (SUSPEND). We'll need to fix the drivers. So yes, putting 3 to all different
158 * defines is intentional, and will go away as soon as drivers are fixed. Also
159 * note that typedef is neccessary, we'll probably want to switch to
160 * typedef struct pm_message_t { int event; int flags; } pm_message_t
161 * or something similar soon.
164 #define PM_EVENT_ON 0
165 #define PM_EVENT_FREEZE 1
166 #define PM_EVENT_SUSPEND 2
168 #define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, })
169 #define PMSG_SUSPEND ((struct pm_message){ .event = PM_EVENT_SUSPEND, })
170 #define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
173 pm_message_t power_state
;
174 unsigned can_wakeup
:1;
176 unsigned should_wakeup
:1;
177 pm_message_t prev_state
;
179 struct device
* pm_parent
;
180 struct list_head entry
;
184 extern void device_pm_set_parent(struct device
* dev
, struct device
* parent
);
186 extern int device_power_down(pm_message_t state
);
187 extern void device_power_up(void);
188 extern void device_resume(void);
191 extern suspend_disk_method_t pm_disk_mode
;
193 extern int device_suspend(pm_message_t state
);
195 #define device_set_wakeup_enable(dev,val) \
196 ((dev)->power.should_wakeup = !!(val))
197 #define device_may_wakeup(dev) \
198 (device_can_wakeup(dev) && (dev)->power.should_wakeup)
200 extern int dpm_runtime_suspend(struct device
*, pm_message_t
);
201 extern void dpm_runtime_resume(struct device
*);
202 extern void __suspend_report_result(const char *function
, void *fn
, int ret
);
204 #define suspend_report_result(fn, ret) \
206 __suspend_report_result(__FUNCTION__, fn, ret); \
209 #else /* !CONFIG_PM */
211 static inline int device_suspend(pm_message_t state
)
216 #define device_set_wakeup_enable(dev,val) do{}while(0)
217 #define device_may_wakeup(dev) (0)
219 static inline int dpm_runtime_suspend(struct device
* dev
, pm_message_t state
)
224 static inline void dpm_runtime_resume(struct device
* dev
)
228 #define suspend_report_result(fn, ret) do { } while (0)
232 /* changes to device_may_wakeup take effect on the next pm state change.
233 * by default, devices should wakeup if they can.
235 #define device_can_wakeup(dev) \
236 ((dev)->power.can_wakeup)
237 #define device_init_wakeup(dev,val) \
239 device_can_wakeup(dev) = !!(val); \
240 device_set_wakeup_enable(dev,val); \
243 #endif /* __KERNEL__ */
245 #endif /* _LINUX_PM_H */