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Commit 5e1a0ca6 authored by Badhri Jagan Sridharan's avatar Badhri Jagan Sridharan
Browse files

Initial commit for usb daemon 

usbd checks whether adb is enabled by default, if yes,
would start adbd and would call into usb hal to configure
usb gadget stack.

Bug: 63669128
Test: Verify that adb gets configured when enabled
Change-Id: If6d06cdadd6d93f181d56619142cbbb04d39a5cd
parent da007e0d

usbd/Android.bp

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cc_binary {

    name: "usbd",

    init_rc: ["usbd.rc"],

    srcs: ["usbd.cpp"],

    shared_libs: [

        "libbase",

        "libhidlbase",

        "libhidltransport",

        "liblog",

        "libutils",

        "libhardware",

        "android.hardware.usb.gadget@1.0",

        "libcutils",

    ],

}

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);

}

usbd/usbd.rc

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service usbd /system/bin/usbd

    class late_start

    oneshot

    user root

    group root usb