1 /*
2  * Copyright (C) 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.server.usb.hal.gadget;
17 
18 import static com.android.server.usb.UsbPortManager.logAndPrint;
19 
20 import com.android.internal.util.IndentingPrintWriter;
21 import com.android.server.usb.hal.gadget.UsbGadgetHidl;
22 import com.android.server.usb.hal.gadget.UsbGadgetAidl;
23 import com.android.server.usb.UsbDeviceManager;
24 
25 import android.util.Log;
26 /**
27  * Helper class that queries the underlying hal layer to populate UsbPortHal instance.
28  */
29 public final class UsbGadgetHalInstance {
30 
getInstance(UsbDeviceManager deviceManager, IndentingPrintWriter pw)31     public static UsbGadgetHal getInstance(UsbDeviceManager deviceManager,
32             IndentingPrintWriter pw) {
33 
34         logAndPrint(Log.DEBUG, pw, "Querying USB Gadget HAL version");
35         if (UsbGadgetAidl.isServicePresent(null)) {
36             logAndPrint(Log.INFO, pw, "USB Gadget HAL AIDL present");
37             return new UsbGadgetAidl(deviceManager, pw);
38         }
39         if (UsbGadgetHidl.isServicePresent(null)) {
40             logAndPrint(Log.INFO, pw, "USB Gadget HAL HIDL present");
41             return new UsbGadgetHidl(deviceManager, pw);
42         }
43 
44         logAndPrint(Log.ERROR, pw, "USB Gadget HAL AIDL/HIDL not present");
45         return null;
46     }
47 }
48 
49