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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "PowerHalLoader"
#include <aidl/android/hardware/power/IPower.h>
#include <android/binder_manager.h>
#include <android/hardware/power/1.1/IPower.h>
#include <android/hardware/power/1.2/IPower.h>
#include <android/hardware/power/1.3/IPower.h>
#include <binder/IServiceManager.h>
#include <hardware/power.h>
#include <hardware_legacy/power.h>
#include <powermanager/PowerHalLoader.h>
using namespace android::hardware::power;
namespace android {
namespace power {
// -------------------------------------------------------------------------------------------------
template <typename T, typename F>
sp<T> loadHal(bool& exists, sp<T>& hal, F& loadFn, const char* halName) {
if (!exists) {
return nullptr;
}
if (hal) {
return hal;
}
hal = loadFn();
if (hal) {
ALOGV("Successfully connected to Power HAL %s service.", halName);
} else {
ALOGV("Power HAL %s service not available.", halName);
exists = false;
}
return hal;
}
// -------------------------------------------------------------------------------------------------
std::mutex PowerHalLoader::gHalMutex;
std::shared_ptr<aidl::android::hardware::power::IPower> PowerHalLoader::gHalAidl = nullptr;
sp<V1_0::IPower> PowerHalLoader::gHalHidlV1_0 = nullptr;
sp<V1_1::IPower> PowerHalLoader::gHalHidlV1_1 = nullptr;
sp<V1_2::IPower> PowerHalLoader::gHalHidlV1_2 = nullptr;
sp<V1_3::IPower> PowerHalLoader::gHalHidlV1_3 = nullptr;
void PowerHalLoader::unloadAll() {
std::lock_guard<std::mutex> lock(gHalMutex);
gHalAidl = nullptr;
gHalHidlV1_0 = nullptr;
gHalHidlV1_1 = nullptr;
gHalHidlV1_2 = nullptr;
gHalHidlV1_3 = nullptr;
}
std::shared_ptr<aidl::android::hardware::power::IPower> PowerHalLoader::loadAidl() {
std::lock_guard<std::mutex> lock(gHalMutex);
static bool gHalExists = true;
if (!gHalExists) {
return nullptr;
}
if (gHalAidl) {
return gHalAidl;
}
auto aidlServiceName =
std::string(aidl::android::hardware::power::IPower::descriptor) + "/default";
if (!AServiceManager_isDeclared(aidlServiceName.c_str())) {
gHalExists = false;
return nullptr;
}
gHalAidl = aidl::android::hardware::power::IPower::fromBinder(
ndk::SpAIBinder(AServiceManager_waitForService(aidlServiceName.c_str())));
if (gHalAidl) {
ALOGI("Successfully connected to Power HAL AIDL service.");
} else {
ALOGI("Power HAL AIDL service not available.");
gHalExists = false;
}
return gHalAidl;
}
sp<V1_0::IPower> PowerHalLoader::loadHidlV1_0() {
std::lock_guard<std::mutex> lock(gHalMutex);
return loadHidlV1_0Locked();
}
sp<V1_1::IPower> PowerHalLoader::loadHidlV1_1() {
std::lock_guard<std::mutex> lock(gHalMutex);
static bool gHalExists = true;
static auto loadFn = []() { return V1_1::IPower::castFrom(loadHidlV1_0Locked()); };
return loadHal<V1_1::IPower>(gHalExists, gHalHidlV1_1, loadFn, "HIDL v1.1");
}
sp<V1_2::IPower> PowerHalLoader::loadHidlV1_2() {
std::lock_guard<std::mutex> lock(gHalMutex);
static bool gHalExists = true;
static auto loadFn = []() { return V1_2::IPower::castFrom(loadHidlV1_0Locked()); };
return loadHal<V1_2::IPower>(gHalExists, gHalHidlV1_2, loadFn, "HIDL v1.2");
}
sp<V1_3::IPower> PowerHalLoader::loadHidlV1_3() {
std::lock_guard<std::mutex> lock(gHalMutex);
static bool gHalExists = true;
static auto loadFn = []() { return V1_3::IPower::castFrom(loadHidlV1_0Locked()); };
return loadHal<V1_3::IPower>(gHalExists, gHalHidlV1_3, loadFn, "HIDL v1.3");
}
sp<V1_0::IPower> PowerHalLoader::loadHidlV1_0Locked() {
static bool gHalExists = true;
static auto loadFn = []() { return V1_0::IPower::getService(); };
return loadHal<V1_0::IPower>(gHalExists, gHalHidlV1_0, loadFn, "HIDL v1.0");
}
// -------------------------------------------------------------------------------------------------
} // namespace power
} // namespace android
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