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/*
* 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 com.android.server.usb.hal.gadget;
import static android.hardware.usb.UsbManager.GADGET_HAL_NOT_SUPPORTED;
import static android.hardware.usb.UsbManager.GADGET_HAL_V1_0;
import static android.hardware.usb.UsbManager.GADGET_HAL_V1_1;
import static android.hardware.usb.UsbManager.GADGET_HAL_V1_2;
import static com.android.server.usb.UsbDeviceManager.logAndPrint;
import static com.android.server.usb.UsbDeviceManager.logAndPrintException;
import android.annotation.Nullable;
import android.hardware.usb.gadget.V1_0.Status;
import android.hardware.usb.gadget.V1_0.IUsbGadget;
import android.hardware.usb.gadget.V1_2.IUsbGadgetCallback;
import android.hardware.usb.gadget.V1_2.UsbSpeed;
import android.hardware.usb.UsbAccessory;
import android.hardware.usb.UsbManager;
import android.hardware.usb.UsbManager.UsbGadgetHalVersion;
import android.hardware.usb.UsbManager.UsbHalVersion;
import android.hidl.manager.V1_0.IServiceManager;
import android.hidl.manager.V1_0.IServiceNotification;
import android.os.IHwBinder;
import android.os.RemoteException;
import android.util.Log;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.util.IndentingPrintWriter;
import com.android.server.usb.UsbDeviceManager;
import java.util.ArrayList;
import java.util.NoSuchElementException;
import java.util.Objects;
/**
*
*/
public final class UsbGadgetHidl implements UsbGadgetHal {
// Cookie sent for usb gadget hal death notification.
private static final int USB_GADGET_HAL_DEATH_COOKIE = 2000;
// Proxy object for the usb gadget hal daemon.
@GuardedBy("mGadgetProxyLock")
private IUsbGadget mGadgetProxy;
private UsbDeviceManager mDeviceManager;
private final IndentingPrintWriter mPw;
// Mutex for all mutable shared state.
private final Object mGadgetProxyLock = new Object();
private UsbGadgetCallback mUsbGadgetCallback;
public @UsbGadgetHalVersion int getGadgetHalVersion() throws RemoteException {
int version;
synchronized(mGadgetProxyLock) {
if (mGadgetProxy == null) {
throw new RemoteException("IUsbGadget not initialized yet");
}
if (android.hardware.usb.gadget.V1_2.IUsbGadget.castFrom(mGadgetProxy) != null) {
version = UsbManager.GADGET_HAL_V1_2;
} else if (android.hardware.usb.gadget.V1_1.IUsbGadget.castFrom(mGadgetProxy) != null) {
version = UsbManager.GADGET_HAL_V1_1;
} else {
version = UsbManager.GADGET_HAL_V1_0;
}
logAndPrint(Log.INFO, mPw, "USB Gadget HAL HIDL version: " + version);
return version;
}
}
final class DeathRecipient implements IHwBinder.DeathRecipient {
private final IndentingPrintWriter mPw;
DeathRecipient(IndentingPrintWriter pw) {
mPw = pw;
}
@Override
public void serviceDied(long cookie) {
if (cookie == USB_GADGET_HAL_DEATH_COOKIE) {
logAndPrint(Log.ERROR, mPw, "Usb Gadget hal service died cookie: " + cookie);
synchronized (mGadgetProxyLock) {
mGadgetProxy = null;
}
}
}
}
final class ServiceNotification extends IServiceNotification.Stub {
@Override
public void onRegistration(String fqName, String name, boolean preexisting) {
logAndPrint(Log.INFO, mPw, "Usb gadget hal service started " + fqName + " " + name);
connectToProxy(null);
}
}
private void connectToProxy(IndentingPrintWriter pw) {
synchronized (mGadgetProxyLock) {
if (mGadgetProxy != null) {
return;
}
try {
mGadgetProxy = IUsbGadget.getService();
mGadgetProxy.linkToDeath(new DeathRecipient(pw), USB_GADGET_HAL_DEATH_COOKIE);
} catch (NoSuchElementException e) {
logAndPrintException(pw, "connectToProxy: usb gadget hal service not found."
+ " Did the service fail to start?", e);
} catch (RemoteException e) {
logAndPrintException(pw, "connectToProxy: usb gadget hal service not responding"
, e);
}
}
}
@Override
public void systemReady() {
}
static boolean isServicePresent(IndentingPrintWriter pw) {
try {
IUsbGadget.getService(true);
} catch (NoSuchElementException e) {
logAndPrintException(pw, "connectToProxy: usb gadget hidl hal service not found.", e);
return false;
} catch (RemoteException e) {
logAndPrintException(pw, "IUSBGadget hal service present but failed to get service", e);
}
return true;
}
public UsbGadgetHidl(UsbDeviceManager deviceManager, IndentingPrintWriter pw) {
mDeviceManager = Objects.requireNonNull(deviceManager);
mPw = pw;
try {
ServiceNotification serviceNotification = new ServiceNotification();
boolean ret = IServiceManager.getService()
.registerForNotifications("android.hardware.usb.gadget@1.0::IUsbGadget",
"", serviceNotification);
if (!ret) {
logAndPrint(Log.ERROR, pw, "Failed to register service start notification");
}
} catch (RemoteException e) {
logAndPrintException(pw, "Failed to register service start notification", e);
return;
}
connectToProxy(mPw);
}
@Override
public void getCurrentUsbFunctions(long transactionId) {
try {
synchronized(mGadgetProxyLock) {
mGadgetProxy.getCurrentUsbFunctions(new UsbGadgetCallback());
}
} catch (RemoteException e) {
logAndPrintException(mPw,
"RemoteException while calling getCurrentUsbFunctions", e);
return;
}
}
@Override
public void getUsbSpeed(long transactionId) {
try {
synchronized(mGadgetProxyLock) {
if (android.hardware.usb.gadget.V1_2.IUsbGadget.castFrom(mGadgetProxy) != null) {
android.hardware.usb.gadget.V1_2.IUsbGadget gadgetProxy =
android.hardware.usb.gadget.V1_2.IUsbGadget.castFrom(mGadgetProxy);
gadgetProxy.getUsbSpeed(new UsbGadgetCallback());
}
}
} catch (RemoteException e) {
logAndPrintException(mPw, "get UsbSpeed failed", e);
}
}
@Override
public void reset() {
try {
synchronized(mGadgetProxyLock) {
if (android.hardware.usb.gadget.V1_2.IUsbGadget.castFrom(mGadgetProxy) != null) {
android.hardware.usb.gadget.V1_2.IUsbGadget gadgetProxy =
android.hardware.usb.gadget.V1_2.IUsbGadget.castFrom(mGadgetProxy);
gadgetProxy.reset();
}
}
} catch (RemoteException e) {
logAndPrintException(mPw,
"RemoteException while calling getUsbSpeed", e);
return;
}
}
@Override
public void setCurrentUsbFunctions(int mRequest, long mFunctions,
boolean mChargingFunctions, int timeout, long operationId) {
try {
mUsbGadgetCallback = new UsbGadgetCallback(null, mRequest,
mFunctions, mChargingFunctions);
synchronized(mGadgetProxyLock) {
mGadgetProxy.setCurrentUsbFunctions(mFunctions, mUsbGadgetCallback, timeout);
}
} catch (RemoteException e) {
logAndPrintException(mPw,
"RemoteException while calling setCurrentUsbFunctions"
+ " mRequest = " + mRequest
+ ", mFunctions = " + mFunctions
+ ", timeout = " + timeout
+ ", mChargingFunctions = " + mChargingFunctions
+ ", operationId =" + operationId, e);
return;
}
}
private class UsbGadgetCallback extends IUsbGadgetCallback.Stub {
public int mRequest;
public long mFunctions;
public boolean mChargingFunctions;
UsbGadgetCallback() {
}
UsbGadgetCallback(IndentingPrintWriter pw, int request,
long functions, boolean chargingFunctions) {
mRequest = request;
mFunctions = functions;
mChargingFunctions = chargingFunctions;
}
@Override
public void setCurrentUsbFunctionsCb(long functions,
int status) {
mDeviceManager.setCurrentUsbFunctionsCb(functions, status,
mRequest, mFunctions, mChargingFunctions);
}
@Override
public void getCurrentUsbFunctionsCb(long functions,
int status) {
mDeviceManager.getCurrentUsbFunctionsCb(functions, status);
}
@Override
public void getUsbSpeedCb(int speed) {
mDeviceManager.getUsbSpeedCb(speed);
}
}
}
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