Revert "remove the Thread Network HAL from the stage folder"

# Bug component: 1203089

wgtdkp@google.com

xyk@google.com

zhanglongxia@google.com

# Staging threadnetwork HAL interface

The directory includes the unstable/unreleased version of `hardware/interfaces/threadnetwork`

code which should **NOT** be used in production. But vendors may start verifying their hardware

with the HAL interface.

This directory will be cleaned up when the stable Thread HAL interface is added in

`hardware/interfaces/threadnetwork` by version `V` or later.

More information about _Thread_:

- https://www.threadgroup.org

- https://openthread.io

package {

    // See: http://go/android-license-faq

    // A large-scale-change added 'default_applicable_licenses' to import

    // all of the 'license_kinds' from "hardware_interfaces_license"

    // to get the below license kinds:

    //   SPDX-license-identifier-Apache-2.0

    default_applicable_licenses: ["hardware_interfaces_license"],

}

aidl_interface {

    name: "android.hardware.threadnetwork",

    host_supported: true,

    vendor_available: true,

    srcs: [

        "android/hardware/threadnetwork/*.aidl",

    ],

    unstable: true,

    backend: {

        ndk: {

            enabled: true,

        },

    },

}

/*

 * Copyright (C) 2022 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.

 */

package android.hardware.threadnetwork;

import android.hardware.threadnetwork.IThreadChipCallback;

/**

 * Controls a Thread radio chip on the device.

 */

interface IThreadChip {

    /**

     * The operation failed for the internal error.

     */

    const int ERROR_FAILED = 1;

    /**

     * Insufficient buffers available to send frames.

     */

    const int ERROR_NO_BUFS = 2;

    /**

     * Service is busy and could not service the operation.

     */

    const int ERROR_BUSY = 3;

    /**

     * This method initializes the Thread HAL instance. If open completes

     * successfully, then the Thread HAL instance is ready to accept spinel

     * messages through sendSpinelFrame() API.

     *

     * @param callback  A IThreadChipCallback callback instance. If multiple

     *                  callbacks are passed in, the open() will return ERROR_BUSY.

     *

     * @throws EX_ILLEGAL_ARGUMENT  if the callback handle is invalid (for example, it is null).

     * @throws ServiceSpecificException with one of the following values:

     *     - ERROR_FAILED        The interface cannot be opened due to an internal error.

     *     - ERROR_BUSY          This interface is in use.

     */

    void open(in IThreadChipCallback callback);

    /**

     * Close the Thread HAL instance. Must free all resources.

     *

     * @throws EX_ILLEGAL_STATE  if the Thread HAL instance is not opened.

     *

     */

    void close();

    /**

     * This method resets the Thread HAL internal state. The callback registered by

     * `open()` won’t be reset and the resource allocated by `open()` won’t be free.

     *

     */

    void reset();

    /**

     * This method sends a spinel frame to the Thread HAL.

     *

     * This method should block until the frame is sent out successfully or

     * the method throws errors immediately.

     *

     * Spinel Protocol:

     *     https://github.com/openthread/openthread/blob/main/src/lib/spinel/spinel.h

     *

     * @param frame  The spinel frame to be sent.

     *

     * @throws ServiceSpecificException with one of the following values:

     *         - ERROR_FAILED The Thread HAL failed to send the frame for an internal reason.

     *         - ERROR_NO_BUFS Insufficient buffer space to send the frame.

     *         - ERROR_BUSY The Thread HAL is busy.

     */

    void sendSpinelFrame(in byte[] frame);

}

/*

 * Copyright (C) 2022 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.

 */

package android.hardware.threadnetwork;

interface IThreadChipCallback {

    /**

     * This method is called when a spinel frame is received. Thread network

     * will process the received spinel frame.

     *

     * Spinel Protocol:

     *     https://github.com/openthread/openthread/blob/main/src/lib/spinel/spinel.h

     *

     * @param frame  The received spinel frame.

     */

    oneway void onReceiveSpinelFrame(in byte[] frame);

}