| // Copyright 2018 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef POWER_MANAGER_POWERD_SYSTEM_WAKEUP_DEVICE_H_ |
| #define POWER_MANAGER_POWERD_SYSTEM_WAKEUP_DEVICE_H_ |
| |
| #include "power_manager/powerd/system/wakeup_device_interface.h" |
| |
| #include <memory> |
| |
| #include <base/files/file_path.h> |
| |
| namespace power_manager { |
| namespace system { |
| |
| class UdevInterface; |
| |
| class WakeupDevice : public WakeupDeviceInterface { |
| public: |
| // Relative path to device specific wakeup_count from the device sysfs |
| // path (power/wakeup_count). |
| static const char kPowerWakeupCount[]; |
| |
| WakeupDevice(const base::FilePath& path, UdevInterface* udev); |
| ~WakeupDevice() override; |
| |
| bool was_pre_suspend_read_successful() const { |
| return was_pre_suspend_read_successful_; |
| } |
| uint64_t wakeup_count_before_suspend() const { |
| return wakeup_count_before_suspend_; |
| } |
| |
| // Implementation of WakeupDeviceInterface. |
| void PrepareForSuspend() override; |
| void HandleResume() override; |
| bool CausedLastWake() const override; |
| |
| private: |
| // Reads the |kPowerWakeupCount|. |wakeup_count_out| is set to the read value |
| // if the read is successful. Returns true on success, false otherwise. |
| bool ReadWakeupCount(uint64_t* wakeup_count_out); |
| |
| // Sysfs path of the directory that hold the device specific power controls. |
| base::FilePath path_; |
| |
| UdevInterface* udev_; // weak |
| |
| // Did this device cause last wake? |
| bool caused_last_wake_ = false; |
| |
| // Wakeup count of the device before the last suspend. |
| uint64_t wakeup_count_before_suspend_ = 0; |
| |
| // Was wakeup_count read before suspend successful? |
| bool was_pre_suspend_read_successful_ = false; |
| |
| DISALLOW_COPY_AND_ASSIGN(WakeupDevice); |
| }; |
| |
| class WakeupDeviceFactory : public WakeupDeviceFactoryInterface { |
| public: |
| explicit WakeupDeviceFactory(UdevInterface* udev); |
| virtual ~WakeupDeviceFactory(); |
| |
| // Implementation of WakeupDeviceFactoryInterface. |
| std::unique_ptr<WakeupDeviceInterface> CreateWakeupDevice( |
| const base::FilePath& path) override; |
| |
| private: |
| UdevInterface* udev_; // weak |
| |
| DISALLOW_COPY_AND_ASSIGN(WakeupDeviceFactory); |
| }; |
| |
| } // namespace system |
| } // namespace power_manager |
| |
| #endif // POWER_MANAGER_POWERD_SYSTEM_WAKEUP_DEVICE_H_ |