healthimpl.cpp

/*
 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *       with the distribution.
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 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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#define LOG_TAG "android.hardware.health@2.1-service.qti"

#include <android-base/logging.h>
#include <health/utils.h>
#include <health2impl/Health.h>
#include <log/log.h>

using ::android::hardware::health::InitHealthdConfig;
using ::android::hardware::health::V2_1::IHealth;
using namespace std::literals;

namespace {
void qti_healthd_board_init(struct healthd_config *)
{
    int fd;
    unsigned char retries = 50;

retry:
    if (!retries) {
        ALOGE("Cannot open battery/capacity, fd=%d\n", fd);
        return;
    }

    fd = open("/sys/class/power_supply/battery/capacity", 0440);
    if (fd >= 0) {
        ALOGI("opened battery/capacity after %d retries\n", 50 - retries);
        close(fd);
        return;
    }

    retries--;
    usleep(100000);
    goto retry;
}
} //anonymous namespace

namespace android {
namespace hardware {
namespace health {
namespace V2_1 {
namespace implementation {

class HealthImpl : public Health {
 public:
  HealthImpl(std::unique_ptr<healthd_config>&& config)
    : Health(std::move(config)) {}
};

}  // namespace implementation
}  // namespace V2_1
}  // namespace health
}  // namespace hardware
}  // namespace android


extern "C" IHealth* HIDL_FETCH_IHealth(const char* instance) {
    using ::android::hardware::health::V2_1::implementation::HealthImpl;
    if (instance != "default"sv) {
        return nullptr;
    }
    auto config = std::make_unique<healthd_config>();
    InitHealthdConfig(config.get());
    qti_healthd_board_init(config.get());

    return new HealthImpl(std::move(config));
}