| /* |
| * Copyright (C) 2015 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.settings.connecteddevice.usb; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.hardware.usb.UsbManager; |
| import android.hardware.usb.UsbPort; |
| import android.hardware.usb.UsbPortStatus; |
| import android.net.ConnectivityManager; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import androidx.annotation.VisibleForTesting; |
| |
| /** |
| * Provides access to underlying system USB functionality. |
| */ |
| public class UsbBackend { |
| |
| static final int PD_ROLE_SWAP_TIMEOUT_MS = 3000; |
| static final int NONPD_ROLE_SWAP_TIMEOUT_MS = 15000; |
| |
| private final boolean mFileTransferRestricted; |
| private final boolean mFileTransferRestrictedBySystem; |
| private final boolean mTetheringRestricted; |
| private final boolean mTetheringRestrictedBySystem; |
| private final boolean mMidiSupported; |
| private final boolean mTetheringSupported; |
| |
| private UsbManager mUsbManager; |
| |
| @Nullable |
| private UsbPort mPort; |
| @Nullable |
| private UsbPortStatus mPortStatus; |
| |
| public UsbBackend(Context context) { |
| this(context, (UserManager) context.getSystemService(Context.USER_SERVICE)); |
| } |
| |
| @VisibleForTesting |
| public UsbBackend(Context context, UserManager userManager) { |
| mUsbManager = context.getSystemService(UsbManager.class); |
| |
| mFileTransferRestricted = isUsbFileTransferRestricted(userManager); |
| mFileTransferRestrictedBySystem = isUsbFileTransferRestrictedBySystem(userManager); |
| mTetheringRestricted = isUsbTetheringRestricted(userManager); |
| mTetheringRestrictedBySystem = isUsbTetheringRestrictedBySystem(userManager); |
| |
| mMidiSupported = context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_MIDI); |
| ConnectivityManager cm = |
| (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); |
| mTetheringSupported = cm.isTetheringSupported(); |
| |
| updatePorts(); |
| } |
| |
| public long getCurrentFunctions() { |
| return mUsbManager.getCurrentFunctions(); |
| } |
| |
| public void setCurrentFunctions(long functions) { |
| mUsbManager.setCurrentFunctions(functions); |
| } |
| |
| public long getDefaultUsbFunctions() { |
| return mUsbManager.getScreenUnlockedFunctions(); |
| } |
| |
| public void setDefaultUsbFunctions(long functions) { |
| mUsbManager.setScreenUnlockedFunctions(functions); |
| } |
| |
| public boolean areFunctionsSupported(long functions) { |
| if ((!mMidiSupported && (functions & UsbManager.FUNCTION_MIDI) != 0) |
| || (!mTetheringSupported && (functions & UsbManager.FUNCTION_RNDIS) != 0)) { |
| return false; |
| } |
| return !(areFunctionDisallowed(functions) || areFunctionsDisallowedBySystem(functions)); |
| } |
| |
| public int getPowerRole() { |
| updatePorts(); |
| return mPortStatus == null ? UsbPort.POWER_ROLE_NONE : mPortStatus.getCurrentPowerRole(); |
| } |
| |
| public int getDataRole() { |
| updatePorts(); |
| return mPortStatus == null ? UsbPort.DATA_ROLE_NONE : mPortStatus.getCurrentDataRole(); |
| } |
| |
| public void setPowerRole(int role) { |
| int newDataRole = getDataRole(); |
| if (!areAllRolesSupported()) { |
| switch (role) { |
| case UsbPort.POWER_ROLE_SINK: |
| newDataRole = UsbPort.DATA_ROLE_DEVICE; |
| break; |
| case UsbPort.POWER_ROLE_SOURCE: |
| newDataRole = UsbPort.DATA_ROLE_HOST; |
| break; |
| default: |
| newDataRole = UsbPort.DATA_ROLE_NONE; |
| } |
| } |
| if (mPort != null) { |
| mUsbManager.setPortRoles(mPort, role, newDataRole); |
| } |
| } |
| |
| public void setDataRole(int role) { |
| int newPowerRole = getPowerRole(); |
| if (!areAllRolesSupported()) { |
| switch (role) { |
| case UsbPort.DATA_ROLE_DEVICE: |
| newPowerRole = UsbPort.POWER_ROLE_SINK; |
| break; |
| case UsbPort.DATA_ROLE_HOST: |
| newPowerRole = UsbPort.POWER_ROLE_SOURCE; |
| break; |
| default: |
| newPowerRole = UsbPort.POWER_ROLE_NONE; |
| } |
| } |
| if (mPort != null) { |
| mUsbManager.setPortRoles(mPort, newPowerRole, role); |
| } |
| } |
| |
| public boolean areAllRolesSupported() { |
| return mPort != null && mPortStatus != null |
| && mPortStatus |
| .isRoleCombinationSupported(UsbPort.POWER_ROLE_SINK, UsbPort.DATA_ROLE_DEVICE) |
| && mPortStatus |
| .isRoleCombinationSupported(UsbPort.POWER_ROLE_SINK, UsbPort.DATA_ROLE_HOST) |
| && mPortStatus |
| .isRoleCombinationSupported(UsbPort.POWER_ROLE_SOURCE, UsbPort.DATA_ROLE_DEVICE) |
| && mPortStatus |
| .isRoleCombinationSupported(UsbPort.POWER_ROLE_SOURCE, UsbPort.DATA_ROLE_HOST); |
| } |
| |
| public static String usbFunctionsToString(long functions) { |
| // TODO replace with UsbManager.usbFunctionsToString once supported by Roboelectric |
| return Long.toBinaryString(functions); |
| } |
| |
| public static long usbFunctionsFromString(String functions) { |
| // TODO replace with UsbManager.usbFunctionsFromString once supported by Roboelectric |
| return Long.parseLong(functions, 2); |
| } |
| |
| public static String dataRoleToString(int role) { |
| return Integer.toString(role); |
| } |
| |
| public static int dataRoleFromString(String role) { |
| return Integer.parseInt(role); |
| } |
| |
| private static boolean isUsbFileTransferRestricted(UserManager userManager) { |
| return userManager.hasUserRestriction(UserManager.DISALLOW_USB_FILE_TRANSFER); |
| } |
| |
| private static boolean isUsbTetheringRestricted(UserManager userManager) { |
| return userManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); |
| } |
| |
| private static boolean isUsbFileTransferRestrictedBySystem(UserManager userManager) { |
| return userManager.hasBaseUserRestriction( |
| UserManager.DISALLOW_USB_FILE_TRANSFER, UserHandle.of(UserHandle.myUserId())); |
| } |
| |
| private static boolean isUsbTetheringRestrictedBySystem(UserManager userManager) { |
| return userManager.hasBaseUserRestriction( |
| UserManager.DISALLOW_CONFIG_TETHERING, UserHandle.of(UserHandle.myUserId())); |
| } |
| |
| private boolean areFunctionDisallowed(long functions) { |
| return (mFileTransferRestricted && ((functions & UsbManager.FUNCTION_MTP) != 0 |
| || (functions & UsbManager.FUNCTION_PTP) != 0)) |
| || (mTetheringRestricted && ((functions & UsbManager.FUNCTION_RNDIS) != 0)); |
| } |
| |
| private boolean areFunctionsDisallowedBySystem(long functions) { |
| return (mFileTransferRestrictedBySystem && ((functions & UsbManager.FUNCTION_MTP) != 0 |
| || (functions & UsbManager.FUNCTION_PTP) != 0)) |
| || (mTetheringRestrictedBySystem && ((functions & UsbManager.FUNCTION_RNDIS) != 0)); |
| } |
| |
| private void updatePorts() { |
| mPort = null; |
| mPortStatus = null; |
| UsbPort[] ports = mUsbManager.getPorts(); |
| if (ports == null) { |
| return; |
| } |
| // For now look for a connected port, in the future we should identify port in the |
| // notification and pick based on that. |
| final int N = ports.length; |
| for (int i = 0; i < N; i++) { |
| UsbPortStatus status = mUsbManager.getPortStatus(ports[i]); |
| if (status.isConnected()) { |
| mPort = ports[i]; |
| mPortStatus = status; |
| break; |
| } |
| } |
| } |
| } |