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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 <healthhalutils/HealthHalUtils.h>
BatteryInfo GetBatteryInfo() {
using android::hardware::health::V1_0::BatteryStatus;
using android::hardware::health::V2_0::get_health_service;
using android::hardware::health::V2_0::IHealth;
using android::hardware::health::V2_0::Result;
using android::hardware::health::V2_0::toString;
android::sp<IHealth> health = get_health_service();
int wait_second = 0;
while (true) {
auto charge_status = BatteryStatus::UNKNOWN;
if (health == nullptr) {
LOG(WARNING) << "No health implementation is found; assuming defaults";
} else {
health
->getChargeStatus([&charge_status](auto res, auto out_status) {
if (res == Result::SUCCESS) {
charge_status = out_status;
}
})
.isOk(); // should not have transport error
}
// Treat unknown status as on charger. See hardware/interfaces/health/1.0/types.hal for the
// meaning of the return values.
bool charging = (charge_status != BatteryStatus::DISCHARGING &&
charge_status != BatteryStatus::NOT_CHARGING);
Result res = Result::UNKNOWN;
int32_t capacity = INT32_MIN;
if (health != nullptr) {
health
->getCapacity([&res, &capacity](auto out_res, auto out_capacity) {
res = out_res;
capacity = out_capacity;
})
.isOk(); // should not have transport error
}
LOG(INFO) << "charge_status " << toString(charge_status) << ", charging " << charging
<< ", status " << toString(res) << ", 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 (res == Result::SUCCESS && capacity == 50) {
if (wait_second < BATTERY_READ_TIMEOUT_IN_SEC) {
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 (res != Result::SUCCESS) {
capacity = 100;
}
return BatteryInfo{ charging, capacity };
}
}
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