1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.server; 18 19 import android.content.Context; 20 import android.os.Handler; 21 import android.os.Looper; 22 import android.os.Message; 23 import android.os.PowerManager; 24 import android.os.PowerManager.WakeLock; 25 import android.os.UEventObserver; 26 import android.util.Slog; 27 import android.media.AudioManager; 28 import android.util.Log; 29 import android.view.InputDevice; 30 31 import com.android.internal.R; 32 import com.android.server.input.InputManagerService; 33 import com.android.server.input.InputManagerService.WiredAccessoryCallbacks; 34 import static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT; 35 import static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT; 36 import static com.android.server.input.InputManagerService.SW_LINEOUT_INSERT; 37 import static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT_BIT; 38 import static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT_BIT; 39 import static com.android.server.input.InputManagerService.SW_LINEOUT_INSERT_BIT; 40 41 import java.io.File; 42 import java.io.FileReader; 43 import java.io.FileNotFoundException; 44 import java.util.ArrayList; 45 import java.util.List; 46 import java.util.Locale; 47 48 /** 49 * <p>WiredAccessoryManager monitors for a wired headset on the main board or dock using 50 * both the InputManagerService notifyWiredAccessoryChanged interface and the UEventObserver 51 * subsystem. 52 */ 53 final class WiredAccessoryManager implements WiredAccessoryCallbacks { 54 private static final String TAG = WiredAccessoryManager.class.getSimpleName(); 55 private static final boolean LOG = true; 56 57 private static final int BIT_HEADSET = (1 << 0); 58 private static final int BIT_HEADSET_NO_MIC = (1 << 1); 59 private static final int BIT_USB_HEADSET_ANLG = (1 << 2); 60 private static final int BIT_USB_HEADSET_DGTL = (1 << 3); 61 private static final int BIT_HDMI_AUDIO = (1 << 4); 62 private static final int BIT_LINEOUT = (1 << 5); 63 private static final int SUPPORTED_HEADSETS = (BIT_HEADSET|BIT_HEADSET_NO_MIC| 64 BIT_USB_HEADSET_ANLG|BIT_USB_HEADSET_DGTL| 65 BIT_HDMI_AUDIO|BIT_LINEOUT); 66 67 private static final String NAME_H2W = "h2w"; 68 private static final String NAME_USB_AUDIO = "usb_audio"; 69 private static final String NAME_HDMI_AUDIO = "hdmi_audio"; 70 private static final String NAME_HDMI = "hdmi"; 71 72 private static final int MSG_NEW_DEVICE_STATE = 1; 73 private static final int MSG_SYSTEM_READY = 2; 74 75 private final Object mLock = new Object(); 76 77 private final WakeLock mWakeLock; // held while there is a pending route change 78 private final AudioManager mAudioManager; 79 80 private int mHeadsetState; 81 82 private int mSwitchValues; 83 84 private final WiredAccessoryObserver mObserver; 85 private final InputManagerService mInputManager; 86 87 private final boolean mUseDevInputEventForAudioJack; 88 WiredAccessoryManager(Context context, InputManagerService inputManager)89 public WiredAccessoryManager(Context context, InputManagerService inputManager) { 90 PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); 91 mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WiredAccessoryManager"); 92 mWakeLock.setReferenceCounted(false); 93 mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE); 94 mInputManager = inputManager; 95 96 mUseDevInputEventForAudioJack = 97 context.getResources().getBoolean(R.bool.config_useDevInputEventForAudioJack); 98 99 mObserver = new WiredAccessoryObserver(); 100 } 101 onSystemReady()102 private void onSystemReady() { 103 if (mUseDevInputEventForAudioJack) { 104 int switchValues = 0; 105 if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_HEADPHONE_INSERT) == 1) { 106 switchValues |= SW_HEADPHONE_INSERT_BIT; 107 } 108 if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_MICROPHONE_INSERT) == 1) { 109 switchValues |= SW_MICROPHONE_INSERT_BIT; 110 } 111 if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_LINEOUT_INSERT) == 1) { 112 switchValues |= SW_LINEOUT_INSERT_BIT; 113 } 114 notifyWiredAccessoryChanged(0, switchValues, 115 SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT | SW_LINEOUT_INSERT_BIT); 116 } 117 118 mObserver.init(); 119 } 120 121 @Override notifyWiredAccessoryChanged(long whenNanos, int switchValues, int switchMask)122 public void notifyWiredAccessoryChanged(long whenNanos, int switchValues, int switchMask) { 123 if (LOG) Slog.v(TAG, "notifyWiredAccessoryChanged: when=" + whenNanos 124 + " bits=" + switchCodeToString(switchValues, switchMask) 125 + " mask=" + Integer.toHexString(switchMask)); 126 127 synchronized (mLock) { 128 int headset; 129 mSwitchValues = (mSwitchValues & ~switchMask) | switchValues; 130 switch (mSwitchValues & 131 (SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT | SW_LINEOUT_INSERT_BIT)) { 132 case 0: 133 headset = 0; 134 break; 135 136 case SW_HEADPHONE_INSERT_BIT: 137 headset = BIT_HEADSET_NO_MIC; 138 break; 139 140 case SW_LINEOUT_INSERT_BIT: 141 headset = BIT_LINEOUT; 142 break; 143 144 case SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT: 145 headset = BIT_HEADSET; 146 break; 147 148 case SW_MICROPHONE_INSERT_BIT: 149 headset = BIT_HEADSET; 150 break; 151 152 default: 153 headset = 0; 154 break; 155 } 156 157 updateLocked(NAME_H2W, 158 (mHeadsetState & ~(BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT)) | headset); 159 } 160 } 161 162 @Override systemReady()163 public void systemReady() { 164 synchronized (mLock) { 165 mWakeLock.acquire(); 166 167 Message msg = mHandler.obtainMessage(MSG_SYSTEM_READY, 0, 0, null); 168 mHandler.sendMessage(msg); 169 } 170 } 171 172 /** 173 * Compare the existing headset state with the new state and pass along accordingly. Note 174 * that this only supports a single headset at a time. Inserting both a usb and jacked headset 175 * results in support for the last one plugged in. Similarly, unplugging either is seen as 176 * unplugging all. 177 * 178 * @param newName One of the NAME_xxx variables defined above. 179 * @param newState 0 or one of the BIT_xxx variables defined above. 180 */ updateLocked(String newName, int newState)181 private void updateLocked(String newName, int newState) { 182 // Retain only relevant bits 183 int headsetState = newState & SUPPORTED_HEADSETS; 184 int usb_headset_anlg = headsetState & BIT_USB_HEADSET_ANLG; 185 int usb_headset_dgtl = headsetState & BIT_USB_HEADSET_DGTL; 186 int h2w_headset = headsetState & (BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT); 187 boolean h2wStateChange = true; 188 boolean usbStateChange = true; 189 if (LOG) Slog.v(TAG, "newName=" + newName 190 + " newState=" + newState 191 + " headsetState=" + headsetState 192 + " prev headsetState=" + mHeadsetState); 193 194 if (mHeadsetState == headsetState) { 195 Log.e(TAG, "No state change."); 196 return; 197 } 198 199 // reject all suspect transitions: only accept state changes from: 200 // - a: 0 headset to 1 headset 201 // - b: 1 headset to 0 headset 202 if (h2w_headset == (BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT)) { 203 Log.e(TAG, "Invalid combination, unsetting h2w flag"); 204 h2wStateChange = false; 205 } 206 // - c: 0 usb headset to 1 usb headset 207 // - d: 1 usb headset to 0 usb headset 208 if (usb_headset_anlg == BIT_USB_HEADSET_ANLG && usb_headset_dgtl == BIT_USB_HEADSET_DGTL) { 209 Log.e(TAG, "Invalid combination, unsetting usb flag"); 210 usbStateChange = false; 211 } 212 if (!h2wStateChange && !usbStateChange) { 213 Log.e(TAG, "invalid transition, returning ..."); 214 return; 215 } 216 217 mWakeLock.acquire(); 218 219 Log.i(TAG, "MSG_NEW_DEVICE_STATE"); 220 Message msg = mHandler.obtainMessage(MSG_NEW_DEVICE_STATE, headsetState, 221 mHeadsetState, ""); 222 mHandler.sendMessage(msg); 223 224 mHeadsetState = headsetState; 225 } 226 227 private final Handler mHandler = new Handler(Looper.myLooper(), null, true) { 228 @Override 229 public void handleMessage(Message msg) { 230 switch (msg.what) { 231 case MSG_NEW_DEVICE_STATE: 232 setDevicesState(msg.arg1, msg.arg2, (String)msg.obj); 233 mWakeLock.release(); 234 break; 235 case MSG_SYSTEM_READY: 236 onSystemReady(); 237 mWakeLock.release(); 238 break; 239 } 240 } 241 }; 242 setDevicesState( int headsetState, int prevHeadsetState, String headsetName)243 private void setDevicesState( 244 int headsetState, int prevHeadsetState, String headsetName) { 245 synchronized (mLock) { 246 int allHeadsets = SUPPORTED_HEADSETS; 247 for (int curHeadset = 1; allHeadsets != 0; curHeadset <<= 1) { 248 if ((curHeadset & allHeadsets) != 0) { 249 setDeviceStateLocked(curHeadset, headsetState, prevHeadsetState, headsetName); 250 allHeadsets &= ~curHeadset; 251 } 252 } 253 } 254 } 255 setDeviceStateLocked(int headset, int headsetState, int prevHeadsetState, String headsetName)256 private void setDeviceStateLocked(int headset, 257 int headsetState, int prevHeadsetState, String headsetName) { 258 if ((headsetState & headset) != (prevHeadsetState & headset)) { 259 int outDevice = 0; 260 int inDevice = 0; 261 int state; 262 263 if ((headsetState & headset) != 0) { 264 state = 1; 265 } else { 266 state = 0; 267 } 268 269 if (headset == BIT_HEADSET) { 270 outDevice = AudioManager.DEVICE_OUT_WIRED_HEADSET; 271 inDevice = AudioManager.DEVICE_IN_WIRED_HEADSET; 272 } else if (headset == BIT_HEADSET_NO_MIC){ 273 outDevice = AudioManager.DEVICE_OUT_WIRED_HEADPHONE; 274 } else if (headset == BIT_LINEOUT){ 275 outDevice = AudioManager.DEVICE_OUT_LINE; 276 } else if (headset == BIT_USB_HEADSET_ANLG) { 277 outDevice = AudioManager.DEVICE_OUT_ANLG_DOCK_HEADSET; 278 } else if (headset == BIT_USB_HEADSET_DGTL) { 279 outDevice = AudioManager.DEVICE_OUT_DGTL_DOCK_HEADSET; 280 } else if (headset == BIT_HDMI_AUDIO) { 281 outDevice = AudioManager.DEVICE_OUT_HDMI; 282 } else { 283 Slog.e(TAG, "setDeviceState() invalid headset type: "+headset); 284 return; 285 } 286 287 if (LOG) { 288 Slog.v(TAG, "headsetName: " + headsetName + 289 (state == 1 ? " connected" : " disconnected")); 290 } 291 292 if (outDevice != 0) { 293 mAudioManager.setWiredDeviceConnectionState(outDevice, state, "", headsetName); 294 } 295 if (inDevice != 0) { 296 mAudioManager.setWiredDeviceConnectionState(inDevice, state, "", headsetName); 297 } 298 } 299 } 300 switchCodeToString(int switchValues, int switchMask)301 private String switchCodeToString(int switchValues, int switchMask) { 302 StringBuffer sb = new StringBuffer(); 303 if ((switchMask & SW_HEADPHONE_INSERT_BIT) != 0 && 304 (switchValues & SW_HEADPHONE_INSERT_BIT) != 0) { 305 sb.append("SW_HEADPHONE_INSERT "); 306 } 307 if ((switchMask & SW_MICROPHONE_INSERT_BIT) != 0 && 308 (switchValues & SW_MICROPHONE_INSERT_BIT) != 0) { 309 sb.append("SW_MICROPHONE_INSERT"); 310 } 311 return sb.toString(); 312 } 313 314 class WiredAccessoryObserver extends UEventObserver { 315 private final List<UEventInfo> mUEventInfo; 316 WiredAccessoryObserver()317 public WiredAccessoryObserver() { 318 mUEventInfo = makeObservedUEventList(); 319 } 320 init()321 void init() { 322 synchronized (mLock) { 323 if (LOG) Slog.v(TAG, "init()"); 324 char[] buffer = new char[1024]; 325 326 for (int i = 0; i < mUEventInfo.size(); ++i) { 327 UEventInfo uei = mUEventInfo.get(i); 328 try { 329 int curState; 330 FileReader file = new FileReader(uei.getSwitchStatePath()); 331 int len = file.read(buffer, 0, 1024); 332 file.close(); 333 curState = Integer.parseInt((new String(buffer, 0, len)).trim()); 334 335 if (curState > 0) { 336 updateStateLocked(uei.getDevPath(), uei.getDevName(), curState); 337 } 338 } catch (FileNotFoundException e) { 339 Slog.w(TAG, uei.getSwitchStatePath() + 340 " not found while attempting to determine initial switch state"); 341 } catch (Exception e) { 342 Slog.e(TAG, "" , e); 343 } 344 } 345 } 346 347 // At any given time accessories could be inserted 348 // one on the board, one on the dock and one on HDMI: 349 // observe three UEVENTs 350 for (int i = 0; i < mUEventInfo.size(); ++i) { 351 UEventInfo uei = mUEventInfo.get(i); 352 startObserving("DEVPATH="+uei.getDevPath()); 353 } 354 } 355 makeObservedUEventList()356 private List<UEventInfo> makeObservedUEventList() { 357 List<UEventInfo> retVal = new ArrayList<UEventInfo>(); 358 UEventInfo uei; 359 360 // Monitor h2w 361 if (!mUseDevInputEventForAudioJack) { 362 uei = new UEventInfo(NAME_H2W, BIT_HEADSET, BIT_HEADSET_NO_MIC, BIT_LINEOUT); 363 if (uei.checkSwitchExists()) { 364 retVal.add(uei); 365 } else { 366 Slog.w(TAG, "This kernel does not have wired headset support"); 367 } 368 } 369 370 // Monitor USB 371 uei = new UEventInfo(NAME_USB_AUDIO, BIT_USB_HEADSET_ANLG, BIT_USB_HEADSET_DGTL, 0); 372 if (uei.checkSwitchExists()) { 373 retVal.add(uei); 374 } else { 375 Slog.w(TAG, "This kernel does not have usb audio support"); 376 } 377 378 // Monitor HDMI 379 // 380 // If the kernel has support for the "hdmi_audio" switch, use that. It will be 381 // signalled only when the HDMI driver has a video mode configured, and the downstream 382 // sink indicates support for audio in its EDID. 383 // 384 // If the kernel does not have an "hdmi_audio" switch, just fall back on the older 385 // "hdmi" switch instead. 386 uei = new UEventInfo(NAME_HDMI_AUDIO, BIT_HDMI_AUDIO, 0, 0); 387 if (uei.checkSwitchExists()) { 388 retVal.add(uei); 389 } else { 390 uei = new UEventInfo(NAME_HDMI, BIT_HDMI_AUDIO, 0, 0); 391 if (uei.checkSwitchExists()) { 392 retVal.add(uei); 393 } else { 394 Slog.w(TAG, "This kernel does not have HDMI audio support"); 395 } 396 } 397 398 return retVal; 399 } 400 401 @Override onUEvent(UEventObserver.UEvent event)402 public void onUEvent(UEventObserver.UEvent event) { 403 if (LOG) Slog.v(TAG, "Headset UEVENT: " + event.toString()); 404 405 try { 406 String devPath = event.get("DEVPATH"); 407 String name = event.get("SWITCH_NAME"); 408 int state = Integer.parseInt(event.get("SWITCH_STATE")); 409 synchronized (mLock) { 410 updateStateLocked(devPath, name, state); 411 } 412 } catch (NumberFormatException e) { 413 Slog.e(TAG, "Could not parse switch state from event " + event); 414 } 415 } 416 updateStateLocked(String devPath, String name, int state)417 private void updateStateLocked(String devPath, String name, int state) { 418 for (int i = 0; i < mUEventInfo.size(); ++i) { 419 UEventInfo uei = mUEventInfo.get(i); 420 if (devPath.equals(uei.getDevPath())) { 421 updateLocked(name, uei.computeNewHeadsetState(mHeadsetState, state)); 422 return; 423 } 424 } 425 } 426 427 private final class UEventInfo { 428 private final String mDevName; 429 private final int mState1Bits; 430 private final int mState2Bits; 431 private final int mStateNbits; 432 UEventInfo(String devName, int state1Bits, int state2Bits, int stateNbits)433 public UEventInfo(String devName, int state1Bits, int state2Bits, int stateNbits) { 434 mDevName = devName; 435 mState1Bits = state1Bits; 436 mState2Bits = state2Bits; 437 mStateNbits = stateNbits; 438 } 439 getDevName()440 public String getDevName() { return mDevName; } 441 getDevPath()442 public String getDevPath() { 443 return String.format(Locale.US, "/devices/virtual/switch/%s", mDevName); 444 } 445 getSwitchStatePath()446 public String getSwitchStatePath() { 447 return String.format(Locale.US, "/sys/class/switch/%s/state", mDevName); 448 } 449 checkSwitchExists()450 public boolean checkSwitchExists() { 451 File f = new File(getSwitchStatePath()); 452 return f.exists(); 453 } 454 computeNewHeadsetState(int headsetState, int switchState)455 public int computeNewHeadsetState(int headsetState, int switchState) { 456 int preserveMask = ~(mState1Bits | mState2Bits | mStateNbits); 457 int setBits = ((switchState == 1) ? mState1Bits : 458 ((switchState == 2) ? mState2Bits : 459 ((switchState == mStateNbits) ? mStateNbits : 0))); 460 461 return ((headsetState & preserveMask) | setBits); 462 } 463 } 464 } 465 } 466