platform_system_core/usbd/usbd.cpp

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/*
* Copyright (C) 2018 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 "usbd"
#include <string>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android/hardware/usb/gadget/1.0/IUsbGadget.h>
#define PERSISTENT_USB_CONFIG "persist.sys.usb.config"
using android::base::GetProperty;
using android::base::SetProperty;
using android::hardware::usb::gadget::V1_0::GadgetFunction;
using android::hardware::usb::gadget::V1_0::IUsbGadget;
using android::hardware::Return;
int main(int /*argc*/, char** /*argv*/) {
android::sp<IUsbGadget> gadget = IUsbGadget::getService();
Return<void> ret;
if (gadget != nullptr) {
LOG(INFO) << "Usb HAL found.";
std::string function = GetProperty(PERSISTENT_USB_CONFIG, "");
if (function == "adb") {
LOG(INFO) << "peristent prop is adb";
SetProperty("ctl.start", "adbd");
ret = gadget->setCurrentUsbFunctions(static_cast<uint64_t>(GadgetFunction::ADB),
nullptr, 0);
} else {
LOG(INFO) << "Signal MTP to enable default functions";
ret = gadget->setCurrentUsbFunctions(static_cast<uint64_t>(GadgetFunction::MTP),
nullptr, 0);
}
if (!ret.isOk()) LOG(ERROR) << "Error while invoking usb hal";
} else {
LOG(INFO) << "Usb HAL not found";
}
exit(0);
}