| /* |
| * Copyright (C) 2011 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.content.Context; |
| import android.hardware.usb.UsbConfiguration; |
| import android.hardware.usb.UsbConstants; |
| import android.hardware.usb.UsbDevice; |
| import android.hardware.usb.UsbEndpoint; |
| import android.hardware.usb.UsbInterface; |
| import android.os.Bundle; |
| import android.os.ParcelFileDescriptor; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| |
| /** |
| * UsbHostManager manages USB state in host mode. |
| */ |
| public class UsbHostManager { |
| private static final String TAG = UsbHostManager.class.getSimpleName(); |
| private static final boolean DEBUG = false; |
| |
| // contains all connected USB devices |
| private final HashMap<String, UsbDevice> mDevices = new HashMap<String, UsbDevice>(); |
| |
| |
| // USB busses to exclude from USB host support |
| private final String[] mHostBlacklist; |
| |
| private final Context mContext; |
| private final Object mLock = new Object(); |
| |
| private UsbDevice mNewDevice; |
| private UsbConfiguration mNewConfiguration; |
| private UsbInterface mNewInterface; |
| private ArrayList<UsbConfiguration> mNewConfigurations; |
| private ArrayList<UsbInterface> mNewInterfaces; |
| private ArrayList<UsbEndpoint> mNewEndpoints; |
| |
| private final UsbAlsaManager mUsbAlsaManager; |
| |
| @GuardedBy("mLock") |
| private UsbSettingsManager mCurrentSettings; |
| |
| public UsbHostManager(Context context, UsbAlsaManager alsaManager) { |
| mContext = context; |
| mHostBlacklist = context.getResources().getStringArray( |
| com.android.internal.R.array.config_usbHostBlacklist); |
| mUsbAlsaManager = alsaManager; |
| } |
| |
| public void setCurrentSettings(UsbSettingsManager settings) { |
| synchronized (mLock) { |
| mCurrentSettings = settings; |
| } |
| } |
| |
| private UsbSettingsManager getCurrentSettings() { |
| synchronized (mLock) { |
| return mCurrentSettings; |
| } |
| } |
| |
| private boolean isBlackListed(String deviceName) { |
| int count = mHostBlacklist.length; |
| for (int i = 0; i < count; i++) { |
| if (deviceName.startsWith(mHostBlacklist[i])) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /* returns true if the USB device should not be accessible by applications */ |
| private boolean isBlackListed(int clazz, int subClass, int protocol) { |
| // blacklist hubs |
| if (clazz == UsbConstants.USB_CLASS_HUB) return true; |
| |
| // blacklist HID boot devices (mouse and keyboard) |
| if (clazz == UsbConstants.USB_CLASS_HID && |
| subClass == UsbConstants.USB_INTERFACE_SUBCLASS_BOOT) { |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* Called from JNI in monitorUsbHostBus() to report new USB devices |
| Returns true if successful, in which case the JNI code will continue adding configurations, |
| interfaces and endpoints, and finally call endUsbDeviceAdded after all descriptors |
| have been processed |
| */ |
| private boolean beginUsbDeviceAdded(String deviceName, int vendorID, int productID, |
| int deviceClass, int deviceSubclass, int deviceProtocol, |
| String manufacturerName, String productName, int version, String serialNumber) { |
| |
| if (DEBUG) { |
| Slog.d(TAG, "usb:UsbHostManager.beginUsbDeviceAdded(" + deviceName + ")"); |
| // Audio Class Codes: |
| // Audio: 0x01 |
| // Audio Subclass Codes: |
| // undefined: 0x00 |
| // audio control: 0x01 |
| // audio streaming: 0x02 |
| // midi streaming: 0x03 |
| |
| // some useful debugging info |
| Slog.d(TAG, "usb: nm:" + deviceName + " vnd:" + vendorID + " prd:" + productID + " cls:" |
| + deviceClass + " sub:" + deviceSubclass + " proto:" + deviceProtocol); |
| } |
| |
| // OK this is non-obvious, but true. One can't tell if the device being attached is even |
| // potentially an audio device without parsing the interface descriptors, so punt on any |
| // such test until endUsbDeviceAdded() when we have that info. |
| |
| if (isBlackListed(deviceName) || |
| isBlackListed(deviceClass, deviceSubclass, deviceProtocol)) { |
| return false; |
| } |
| |
| synchronized (mLock) { |
| if (mDevices.get(deviceName) != null) { |
| Slog.w(TAG, "device already on mDevices list: " + deviceName); |
| return false; |
| } |
| |
| if (mNewDevice != null) { |
| Slog.e(TAG, "mNewDevice is not null in endUsbDeviceAdded"); |
| return false; |
| } |
| |
| // Create version string in "%.%" format |
| String versionString = Integer.toString(version >> 8) + "." + (version & 0xFF); |
| |
| mNewDevice = new UsbDevice(deviceName, vendorID, productID, |
| deviceClass, deviceSubclass, deviceProtocol, |
| manufacturerName, productName, versionString, serialNumber); |
| |
| mNewConfigurations = new ArrayList<UsbConfiguration>(); |
| mNewInterfaces = new ArrayList<UsbInterface>(); |
| mNewEndpoints = new ArrayList<UsbEndpoint>(); |
| } |
| |
| return true; |
| } |
| |
| /* Called from JNI in monitorUsbHostBus() to report new USB configuration for the device |
| currently being added. Returns true if successful, false in case of error. |
| */ |
| private void addUsbConfiguration(int id, String name, int attributes, int maxPower) { |
| if (mNewConfiguration != null) { |
| mNewConfiguration.setInterfaces( |
| mNewInterfaces.toArray(new UsbInterface[mNewInterfaces.size()])); |
| mNewInterfaces.clear(); |
| } |
| |
| mNewConfiguration = new UsbConfiguration(id, name, attributes, maxPower); |
| mNewConfigurations.add(mNewConfiguration); |
| } |
| |
| /* Called from JNI in monitorUsbHostBus() to report new USB interface for the device |
| currently being added. Returns true if successful, false in case of error. |
| */ |
| private void addUsbInterface(int id, String name, int altSetting, |
| int Class, int subClass, int protocol) { |
| if (mNewInterface != null) { |
| mNewInterface.setEndpoints( |
| mNewEndpoints.toArray(new UsbEndpoint[mNewEndpoints.size()])); |
| mNewEndpoints.clear(); |
| } |
| |
| mNewInterface = new UsbInterface(id, altSetting, name, Class, subClass, protocol); |
| mNewInterfaces.add(mNewInterface); |
| } |
| |
| /* Called from JNI in monitorUsbHostBus() to report new USB endpoint for the device |
| currently being added. Returns true if successful, false in case of error. |
| */ |
| private void addUsbEndpoint(int address, int attributes, int maxPacketSize, int interval) { |
| mNewEndpoints.add(new UsbEndpoint(address, attributes, maxPacketSize, interval)); |
| } |
| |
| /* Called from JNI in monitorUsbHostBus() to finish adding a new device */ |
| private void endUsbDeviceAdded() { |
| if (DEBUG) { |
| Slog.d(TAG, "usb:UsbHostManager.endUsbDeviceAdded()"); |
| } |
| if (mNewInterface != null) { |
| mNewInterface.setEndpoints( |
| mNewEndpoints.toArray(new UsbEndpoint[mNewEndpoints.size()])); |
| } |
| if (mNewConfiguration != null) { |
| mNewConfiguration.setInterfaces( |
| mNewInterfaces.toArray(new UsbInterface[mNewInterfaces.size()])); |
| } |
| |
| |
| synchronized (mLock) { |
| if (mNewDevice != null) { |
| mNewDevice.setConfigurations( |
| mNewConfigurations.toArray(new UsbConfiguration[mNewConfigurations.size()])); |
| mDevices.put(mNewDevice.getDeviceName(), mNewDevice); |
| Slog.d(TAG, "Added device " + mNewDevice); |
| getCurrentSettings().deviceAttached(mNewDevice); |
| mUsbAlsaManager.usbDeviceAdded(mNewDevice); |
| } else { |
| Slog.e(TAG, "mNewDevice is null in endUsbDeviceAdded"); |
| } |
| mNewDevice = null; |
| mNewConfigurations = null; |
| mNewInterfaces = null; |
| mNewEndpoints = null; |
| } |
| } |
| |
| /* Called from JNI in monitorUsbHostBus to report USB device removal */ |
| private void usbDeviceRemoved(String deviceName) { |
| synchronized (mLock) { |
| UsbDevice device = mDevices.remove(deviceName); |
| if (device != null) { |
| mUsbAlsaManager.usbDeviceRemoved(device); |
| getCurrentSettings().deviceDetached(device); |
| } |
| } |
| } |
| |
| public void systemReady() { |
| synchronized (mLock) { |
| // Create a thread to call into native code to wait for USB host events. |
| // This thread will call us back on usbDeviceAdded and usbDeviceRemoved. |
| Runnable runnable = new Runnable() { |
| public void run() { |
| monitorUsbHostBus(); |
| } |
| }; |
| new Thread(null, runnable, "UsbService host thread").start(); |
| } |
| } |
| |
| /* Returns a list of all currently attached USB devices */ |
| public void getDeviceList(Bundle devices) { |
| synchronized (mLock) { |
| for (String name : mDevices.keySet()) { |
| devices.putParcelable(name, mDevices.get(name)); |
| } |
| } |
| } |
| |
| /* Opens the specified USB device */ |
| public ParcelFileDescriptor openDevice(String deviceName) { |
| synchronized (mLock) { |
| if (isBlackListed(deviceName)) { |
| throw new SecurityException("USB device is on a restricted bus"); |
| } |
| UsbDevice device = mDevices.get(deviceName); |
| if (device == null) { |
| // if it is not in mDevices, it either does not exist or is blacklisted |
| throw new IllegalArgumentException( |
| "device " + deviceName + " does not exist or is restricted"); |
| } |
| getCurrentSettings().checkPermission(device); |
| return nativeOpenDevice(deviceName); |
| } |
| } |
| |
| public void dump(FileDescriptor fd, PrintWriter pw) { |
| synchronized (mLock) { |
| pw.println(" USB Host State:"); |
| for (String name : mDevices.keySet()) { |
| pw.println(" " + name + ": " + mDevices.get(name)); |
| } |
| } |
| } |
| |
| private native void monitorUsbHostBus(); |
| private native ParcelFileDescriptor nativeOpenDevice(String deviceName); |
| } |