DO NOT MERGE: Backport USB accessory support to gingerbread

Signed-off-by: Mike Lockwood <lockwood@android.com>

Author: mikeandroid

Android.mk

@@ -113,6 +113,7 @@ LOCAL_SRC_FILES += \
 	core/java/android/content/pm/IPackageMoveObserver.aidl \
 	core/java/android/content/pm/IPackageStatsObserver.aidl \
 	core/java/android/database/IContentObserver.aidl \
+	core/java/android/hardware/usb/IUsbManager.aidl \
 	core/java/android/net/IConnectivityManager.aidl \
 	core/java/android/net/INetworkManagementEventObserver.aidl \
 	core/java/android/net/IThrottleManager.aidl \

core/java/android/app/ContextImpl.java

@@ -62,6 +62,8 @@
 import android.graphics.Bitmap;
 import android.graphics.drawable.Drawable;
 import android.hardware.SensorManager;
+import android.hardware.usb.IUsbManager;
+import android.hardware.usb.UsbManager;
 import android.location.ILocationManager;
 import android.location.LocationManager;
 import android.media.AudioManager;
@@ -191,6 +193,7 @@ class ContextImpl extends Context {
     private SearchManager mSearchManager = null;
     private SensorManager mSensorManager = null;
     private StorageManager mStorageManager = null;
+    private UsbManager mUsbManager = null;
     private Vibrator mVibrator = null;
     private LayoutInflater mLayoutInflater = null;
     private StatusBarManager mStatusBarManager = null;
@@ -954,6 +957,8 @@ public Object getSystemService(String name) {
             return getSensorManager();
         } else if (STORAGE_SERVICE.equals(name)) {
             return getStorageManager();
+        } else if (USB_SERVICE.equals(name)) {
+            return getUsbManager();
         } else if (VIBRATOR_SERVICE.equals(name)) {
             return getVibrator();
         } else if (STATUS_BAR_SERVICE.equals(name)) {
@@ -1148,6 +1153,17 @@ private StorageManager getStorageManager() {
         return mStorageManager;
     }
 
+    private UsbManager getUsbManager() {
+        synchronized (mSync) {
+            if (mUsbManager == null) {
+                IBinder b = ServiceManager.getService(USB_SERVICE);
+                IUsbManager service = IUsbManager.Stub.asInterface(b);
+                mUsbManager = new UsbManager(service);
+            }
+        }
+        return mUsbManager;
+    }
+
     private Vibrator getVibrator() {
         synchronized (mSync) {
             if (mVibrator == null) {

core/java/android/content/Context.java

@@ -1566,6 +1566,17 @@ public abstract boolean startInstrumentation(ComponentName className,
     /** @hide */
     public static final String SIP_SERVICE = "sip";
 
+    /**
+     * Use with {@link #getSystemService} to retrieve a {@link
+     * android.hardware.usb.UsbManager} for access to USB devices (as a USB host)
+     * and for controlling this device's behavior as a USB device.
+     *
+     * @see #getSystemService
+     * @see android.harware.usb.UsbManager
+     * @hide
+     */
+    public static final String USB_SERVICE = "usb";
+
     /**
      * Determine whether the given permission is allowed for a particular
      * process and user ID running in the system.

core/java/android/content/pm/PackageManager.java

@@ -783,6 +783,13 @@ public NameNotFoundException(String name) {
     @SdkConstant(SdkConstantType.FEATURE)
     public static final String FEATURE_TELEPHONY_GSM = "android.hardware.telephony.gsm";
 
+    /**
+     * Feature for {@link #getSystemAvailableFeatures} and
+     * {@link #hasSystemFeature}: The device supports connecting to USB accessories.
+     * @hide
+     */
+    public static final String FEATURE_USB_ACCESSORY = "android.hardware.usb.accessory";
+
     /**
      * Feature for {@link #getSystemAvailableFeatures} and
      * {@link #hasSystemFeature}: The SIP API is enabled on the device.

core/java/android/hardware/UsbManager.java

@@ -0,0 +1,47 @@
+/*
+ * 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 and
+ * limitations under the License.
+ */
+
+package android.hardware.usb;
+
+import android.hardware.usb.UsbAccessory;
+import android.os.Bundle;
+import android.os.ParcelFileDescriptor;
+
+/** @hide */
+interface IUsbManager
+{
+    /* Returns the currently attached USB accessory */
+    UsbAccessory getCurrentAccessory();
+
+    /* Returns a file descriptor for communicating with the USB accessory.
+     * This file descriptor can be used with standard Java file operations.
+     */
+    ParcelFileDescriptor openAccessory(in UsbAccessory accessory);
+
+    /* Sets the default package for a USB accessory
+     * (or clears it if the package name is null)
+     */
+    void setAccessoryPackage(in UsbAccessory accessory, String packageName);
+
+    /* Grants permission for the given UID to access the accessory */
+    void grantAccessoryPermission(in UsbAccessory accessory, int uid);
+
+    /* Returns true if the USB manager has default preferences or permissions for the package */
+    boolean hasDefaults(String packageName, int uid);
+
+    /* Clears default preferences and permissions for the package */
+    oneway void clearDefaults(String packageName, int uid);
+}

core/java/android/hardware/usb/IUsbManager.aidl

@@ -0,0 +1,19 @@
+/*
+ * 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 and
+ * limitations under the License.
+ */
+
+package android.hardware.usb;
+
+parcelable UsbAccessory;