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/*
* Copyright (C) 2019 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.
*/
#include "recovery_utils/battery_utils.h"
#include <stdint.h>
#include <unistd.h>
#include <android-base/logging.h>
#include <android/binder_manager.h>
#include <health-shim/shim.h>
#include <healthhalutils/HealthHalUtils.h>
BatteryInfo GetBatteryInfo() {
using android::hardware::health::V2_0::get_health_service;
using HidlHealth = android::hardware::health::V2_0::IHealth;
using aidl::android::hardware::health::BatteryStatus;
using aidl::android::hardware::health::HealthShim;
using aidl::android::hardware::health::IHealth;
using aidl::android::hardware::health::toString;
using std::string_literals::operator""s;
auto service_name = IHealth::descriptor + "/default"s;
std::shared_ptr<IHealth> health;
if (AServiceManager_isDeclared(service_name.c_str())) {
ndk::SpAIBinder binder(AServiceManager_waitForService(service_name.c_str()));
health = IHealth::fromBinder(binder);
}
if (health == nullptr) {
LOG(INFO) << "Unable to get AIDL health service, trying HIDL...";
android::sp<HidlHealth> hidl_health = get_health_service();
if (hidl_health != nullptr) {
health = ndk::SharedRefBase::make<HealthShim>(hidl_health);
}
}
if (health == nullptr) {
LOG(WARNING) << "No health implementation is found; assuming defaults";
}
int wait_second = 0;
while (true) {
auto charge_status = BatteryStatus::UNKNOWN;
if (health != nullptr) {
auto res = health->getChargeStatus(&charge_status);
if (!res.isOk()) {
LOG(WARNING) << "Unable to call getChargeStatus: " << res.getDescription();
charge_status = BatteryStatus::UNKNOWN;
}
}
// Treat unknown status as on charger. See hardware/interfaces/health/aidl/BatteryStatus.aidl
// for the meaning of the return values.
bool charging = (charge_status != BatteryStatus::DISCHARGING &&
charge_status != BatteryStatus::NOT_CHARGING);
int32_t capacity = INT32_MIN;
if (health != nullptr) {
auto res = health->getCapacity(&capacity);
if (!res.isOk()) {
LOG(WARNING) << "Unable to call getCapacity: " << res.getDescription();
capacity = INT32_MIN;
}
}
LOG(INFO) << "charge_status " << toString(charge_status) << ", charging " << charging
<< ", capacity " << capacity;
constexpr int BATTERY_READ_TIMEOUT_IN_SEC = 10;
// At startup, the battery drivers in devices like N5X/N6P take some time to load
// the battery profile. Before the load finishes, it reports value 50 as a fake
// capacity. BATTERY_READ_TIMEOUT_IN_SEC is set that the battery drivers are expected
// to finish loading the battery profile earlier than 10 seconds after kernel startup.
if (capacity == 50) {
if (wait_second < BATTERY_READ_TIMEOUT_IN_SEC) {
LOG(INFO) << "Battery capacity == 50, waiting "
<< (BATTERY_READ_TIMEOUT_IN_SEC - wait_second)
<< " seconds to ensure this is not a fake value...";
sleep(1);
wait_second++;
continue;
}
}
// If we can't read battery percentage, it may be a device without battery. In this
// situation, use 100 as a fake battery percentage.
if (capacity == INT32_MIN) {
LOG(WARNING) << "Using fake battery capacity 100.";
capacity = 100;
}
LOG(INFO) << "GetBatteryInfo() reporting charging " << charging << ", capacity " << capacity;
return BatteryInfo{ charging, capacity };
}
}
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