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1: /* 2: * pm_wakeup.h - Power management wakeup interface 3: * 4: * Copyright (C) 2008 Alan Stern 5: * Copyright (C) 2010 Rafael J. Wysocki, Novell Inc. 6: * 7: * This program is free software; you can redistribute it and/or modify 8: * it under the terms of the GNU General Public License as published by 9: * the Free Software Foundation; either version 2 of the License, or 10: * (at your option) any later version. 11: * 12: * This program is distributed in the hope that it will be useful, 13: * but WITHOUT ANY WARRANTY; without even the implied warranty of 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15: * GNU General Public License for more details. 16: * 17: * You should have received a copy of the GNU General Public License 18: * along with this program; if not, write to the Free Software 19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20: */ 21: 22: #ifndef _LINUX_PM_WAKEUP_H 23: #define _LINUX_PM_WAKEUP_H 24: 25: #ifndef _DEVICE_H_ 26: # error "please don't include this file directly" 27: #endif 28: 29: #include <linux/types.h> 30: 31: /** 32: * struct wakeup_source - Representation of wakeup sources 33: * 34: * @total_time: Total time this wakeup source has been active. 35: * @max_time: Maximum time this wakeup source has been continuously active. 36: * @last_time: Monotonic clock when the wakeup source's was touched last time. 37: * @prevent_sleep_time: Total time this source has been preventing autosleep. 38: * @event_count: Number of signaled wakeup events. 39: * @active_count: Number of times the wakeup source was activated. 40: * @relax_count: Number of times the wakeup source was deactivated. 41: * @expire_count: Number of times the wakeup source's timeout has expired. 42: * @wakeup_count: Number of times the wakeup source might abort suspend. 43: * @active: Status of the wakeup source. 44: * @has_timeout: The wakeup source has been activated with a timeout. 45: */ 46: struct wakeup_source { 47: const char *name; 48: struct list_head entry; 49: spinlock_t lock; 50: struct timer_list timer; 51: unsigned long timer_expires; 52: ktime_t total_time; 53: ktime_t max_time; 54: ktime_t last_time; 55: ktime_t start_prevent_time; 56: ktime_t prevent_sleep_time; 57: unsigned long event_count; 58: unsigned long active_count; 59: unsigned long relax_count; 60: unsigned long expire_count; 61: unsigned long wakeup_count; 62: bool active:1; 63: bool autosleep_enabled:1; 64: }; 65: 66: #ifdef CONFIG_PM_SLEEP 67: 68: /* 69: * Changes to device_may_wakeup take effect on the next pm state change. 70: */ 71: 72: static inline bool device_can_wakeup(struct device *dev) 73: { 74: return dev->power.can_wakeup; 75: } 76: 77: static inline bool device_may_wakeup(struct device *dev) 78: { 79: return dev->power.can_wakeup && !!dev->power.wakeup; 80: } 81: 82: /* drivers/base/power/wakeup.c */ 83: extern void wakeup_source_prepare(struct wakeup_source *ws, const char *name); 84: extern struct wakeup_source *wakeup_source_create(const char *name); 85: extern void wakeup_source_drop(struct wakeup_source *ws); 86: extern void wakeup_source_destroy(struct wakeup_source *ws); 87: extern void wakeup_source_add(struct wakeup_source *ws); 88: extern void wakeup_source_remove(struct wakeup_source *ws); 89: extern struct wakeup_source *wakeup_source_register(const char *name); 90: extern void wakeup_source_unregister(struct wakeup_source *ws); 91: extern int device_wakeup_enable(struct device *dev); 92: extern int device_wakeup_disable(struct device *dev); 93: extern void device_set_wakeup_capable(struct device *dev, bool capable); 94: extern int device_init_wakeup(struct device *dev, bool val); 95: extern int device_set_wakeup_enable(struct device *dev, bool enable); 96: extern void __pm_stay_awake(struct wakeup_source *ws); 97: extern void pm_stay_awake(struct device *dev); 98: extern void __pm_relax(struct wakeup_source *ws); 99: extern void pm_relax(struct device *dev); 100: extern void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec); 101: extern void pm_wakeup_event(struct device *dev, unsigned int msec); 102: 103: #else /* !CONFIG_PM_SLEEP */ 104: 105: static inline void device_set_wakeup_capable(struct device *dev, bool capable) 106: { 107: dev->power.can_wakeup = capable; 108: } 109: 110: static inline bool device_can_wakeup(struct device *dev) 111: { 112: return dev->power.can_wakeup; 113: } 114: 115: static inline void wakeup_source_prepare(struct wakeup_source *ws, 116: const char *name) {} 117: 118: static inline struct wakeup_source *wakeup_source_create(const char *name) 119: { 120: return NULL; 121: } 122: 123: static inline void wakeup_source_drop(struct wakeup_source *ws) {} 124: 125: static inline void wakeup_source_destroy(struct wakeup_source *ws) {} 126: 127: static inline void wakeup_source_add(struct wakeup_source *ws) {} 128: 129: static inline void wakeup_source_remove(struct wakeup_source *ws) {} 130: 131: static inline struct wakeup_source *wakeup_source_register(const char *name) 132: { 133: return NULL; 134: } 135: 136: static inline void wakeup_source_unregister(struct wakeup_source *ws) {} 137: 138: static inline int device_wakeup_enable(struct device *dev) 139: { 140: dev->power.should_wakeup = true; 141: return 0; 142: } 143: 144: static inline int device_wakeup_disable(struct device *dev) 145: { 146: dev->power.should_wakeup = false; 147: return 0; 148: } 149: 150: static inline int device_set_wakeup_enable(struct device *dev, bool enable) 151: { 152: dev->power.should_wakeup = enable; 153: return 0; 154: } 155: 156: static inline int device_init_wakeup(struct device *dev, bool val) 157: { 158: device_set_wakeup_capable(dev, val); 159: device_set_wakeup_enable(dev, val); 160: return 0; 161: } 162: 163: static inline bool device_may_wakeup(struct device *dev) 164: { 165: return dev->power.can_wakeup && dev->power.should_wakeup; 166: } 167: 168: static inline void __pm_stay_awake(struct wakeup_source *ws) {} 169: 170: static inline void pm_stay_awake(struct device *dev) {} 171: 172: static inline void __pm_relax(struct wakeup_source *ws) {} 173: 174: static inline void pm_relax(struct device *dev) {} 175: 176: static inline void __pm_wakeup_event(struct wakeup_source *ws, unsigned int msec) {} 177: 178: static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {} 179: 180: #endif /* !CONFIG_PM_SLEEP */ 181: 182: static inline void wakeup_source_init(struct wakeup_source *ws, 183: const char *name) 184: { 185: wakeup_source_prepare(ws, name); 186: wakeup_source_add(ws); 187: } 188: 189: static inline void wakeup_source_trash(struct wakeup_source *ws) 190: { 191: wakeup_source_remove(ws); 192: wakeup_source_drop(ws); 193: } 194: 195: #endif /* _LINUX_PM_WAKEUP_H */ 196: