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/*
* Copyright (C) 2010 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 an
* limitations under the License.
*/
package com.android.server.usb;
import android.app.PendingIntent;
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.hardware.usb.IUsbManager;
import android.hardware.usb.UsbAccessory;
import android.hardware.usb.UsbDevice;
import android.net.Uri;
import android.os.Binder;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import java.io.File;
import java.io.FileDescriptor;
import java.io.PrintWriter;
/**
* UsbService manages all USB related state, including both host and device support.
* Host related events and calls are delegated to UsbHostManager, and device related
* support is delegated to UsbDeviceManager.
*/
public class UsbService extends IUsbManager.Stub {
private final Context mContext;
private UsbDeviceManager mDeviceManager;
private UsbHostManager mHostManager;
private final UsbSettingsManager mSettingsManager;
public UsbService(Context context) {
mContext = context;
mSettingsManager = new UsbSettingsManager(context);
PackageManager pm = mContext.getPackageManager();
if (pm.hasSystemFeature(PackageManager.FEATURE_USB_HOST)) {
mHostManager = new UsbHostManager(context, mSettingsManager);
}
if (new File("/sys/class/android_usb").exists()) {
mDeviceManager = new UsbDeviceManager(context, mSettingsManager);
}
else if(new File(Resources.getSystem().getString(com.android.internal.R.string.config_legacyUmsLunFile)).exists())
mDeviceManager = new LegacyUsbDeviceManager(context, mSettingsManager);
}
public void systemReady() {
if (mDeviceManager != null) {
mDeviceManager.systemReady();
}
if (mHostManager != null) {
mHostManager.systemReady();
}
}
/* Returns a list of all currently attached USB devices (host mdoe) */
public void getDeviceList(Bundle devices) {
if (mHostManager != null) {
mHostManager.getDeviceList(devices);
}
}
/* Opens the specified USB device (host mode) */
public ParcelFileDescriptor openDevice(String deviceName) {
if (mHostManager != null) {
return mHostManager.openDevice(deviceName);
} else {
return null;
}
}
/* returns the currently attached USB accessory (device mode) */
public UsbAccessory getCurrentAccessory() {
if (mDeviceManager != null) {
return mDeviceManager.getCurrentAccessory();
} else {
return null;
}
}
/* opens the currently attached USB accessory (device mode) */
public ParcelFileDescriptor openAccessory(UsbAccessory accessory) {
if (mDeviceManager != null) {
return mDeviceManager.openAccessory(accessory);
} else {
return null;
}
}
public void setDevicePackage(UsbDevice device, String packageName) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
mSettingsManager.setDevicePackage(device, packageName);
}
public void setAccessoryPackage(UsbAccessory accessory, String packageName) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
mSettingsManager.setAccessoryPackage(accessory, packageName);
}
public boolean hasDevicePermission(UsbDevice device) {
return mSettingsManager.hasPermission(device);
}
public boolean hasAccessoryPermission(UsbAccessory accessory) {
return mSettingsManager.hasPermission(accessory);
}
public void requestDevicePermission(UsbDevice device, String packageName,
PendingIntent pi) {
mSettingsManager.requestPermission(device, packageName, pi);
}
public void requestAccessoryPermission(UsbAccessory accessory, String packageName,
PendingIntent pi) {
mSettingsManager.requestPermission(accessory, packageName, pi);
}
public void grantDevicePermission(UsbDevice device, int uid) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
mSettingsManager.grantDevicePermission(device, uid);
}
public void grantAccessoryPermission(UsbAccessory accessory, int uid) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
mSettingsManager.grantAccessoryPermission(accessory, uid);
}
public boolean hasDefaults(String packageName) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
return mSettingsManager.hasDefaults(packageName);
}
public void clearDefaults(String packageName) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
mSettingsManager.clearDefaults(packageName);
}
public void setCurrentFunction(String function, boolean makeDefault) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
if (mDeviceManager != null) {
mDeviceManager.setCurrentFunction(function, makeDefault);
} else {
throw new IllegalStateException("USB device mode not supported");
}
}
public void setMassStorageBackingFile(String path) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.MANAGE_USB, null);
if (mDeviceManager != null) {
mDeviceManager.setMassStorageBackingFile(path);
} else {
throw new IllegalStateException("USB device mode not supported");
}
}
@Override
public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
!= PackageManager.PERMISSION_GRANTED) {
pw.println("Permission Denial: can't dump UsbManager from from pid="
+ Binder.getCallingPid()
+ ", uid=" + Binder.getCallingUid());
return;
}
pw.println("USB Manager State:");
if (mDeviceManager != null) {
mDeviceManager.dump(fd, pw);
}
if (mHostManager != null) {
mHostManager.dump(fd, pw);
}
mSettingsManager.dump(fd, pw);
}
}
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