WiredAccessoryManager.java revision 43cc8bbbbd5e6418cdfa0fa4b26c9f5c3a28c029
120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber/* 220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Copyright (C) 2008 The Android Open Source Project 320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * you may not use this file except in compliance with the License. 620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * You may obtain a copy of the License at 720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * 1020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * Unless required by applicable law or agreed to in writing, software 1120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 1220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * See the License for the specific language governing permissions and 1420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * limitations under the License. 1520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber */ 1620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberpackage com.android.server; 1820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.content.BroadcastReceiver; 2020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.content.Context; 2120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.content.Intent; 2220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.content.IntentFilter; 2320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.os.Handler; 2420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.os.Looper; 2520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.os.Message; 2620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.os.PowerManager; 2720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.os.PowerManager.WakeLock; 2820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.os.UEventObserver; 2920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.util.Slog; 30ed54ad0f8619ae416b0968ade6248894cbfc4dbaAndreas Huberimport android.media.AudioManager; 3120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.util.Log; 3220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberimport android.view.InputDevice; 3320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 34bfa6b2d7a1be1832ac40ed90aece1834f720b5c6Andreas Huberimport com.android.internal.R; 35bfa6b2d7a1be1832ac40ed90aece1834f720b5c6Andreas Huberimport com.android.server.input.InputManagerService; 36bfa6b2d7a1be1832ac40ed90aece1834f720b5c6Andreas Huberimport com.android.server.input.InputManagerService.WiredAccessoryCallbacks; 37bfa6b2d7a1be1832ac40ed90aece1834f720b5c6Andreas Huberimport static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT; 38bfa6b2d7a1be1832ac40ed90aece1834f720b5c6Andreas Huberimport static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT; 39ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgeraldimport static com.android.server.input.InputManagerService.SW_LINEOUT_INSERT; 40ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgeraldimport static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT_BIT; 4194ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgeraldimport static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT_BIT; 4294ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgeraldimport static com.android.server.input.InputManagerService.SW_LINEOUT_INSERT_BIT; 4394ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald 4494ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgeraldimport java.io.File; 45ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgeraldimport java.io.FileReader; 46ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgeraldimport java.io.FileNotFoundException; 47ed54ad0f8619ae416b0968ade6248894cbfc4dbaAndreas Huberimport java.util.ArrayList; 48ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgeraldimport java.util.List; 49ed54ad0f8619ae416b0968ade6248894cbfc4dbaAndreas Huberimport java.util.Locale; 50ed54ad0f8619ae416b0968ade6248894cbfc4dbaAndreas Huber 51693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber/** 5220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * <p>WiredAccessoryManager monitors for a wired headset on the main board or dock using 5320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber * both the InputManagerService notifyWiredAccessoryChanged interface and the UEventObserver 54693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber * subsystem. 5520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber */ 5620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huberfinal class WiredAccessoryManager implements WiredAccessoryCallbacks { 5720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final String TAG = WiredAccessoryManager.class.getSimpleName(); 5820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final boolean LOG = true; 59e7e3b785a0e7819db4c895a4f60e9a4dd755880cAndreas Huber 6020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final int BIT_HEADSET = (1 << 0); 61b2e3954c94717e43b3dc9b880564f166cfbbc0a2Andreas Huber private static final int BIT_HEADSET_NO_MIC = (1 << 1); 6294ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald private static final int BIT_USB_HEADSET_ANLG = (1 << 2); 6320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final int BIT_USB_HEADSET_DGTL = (1 << 3); 6420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final int BIT_HDMI_AUDIO = (1 << 4); 6520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final int BIT_LINEOUT = (1 << 5); 6620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final int SUPPORTED_HEADSETS = (BIT_HEADSET|BIT_HEADSET_NO_MIC| 6720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber BIT_USB_HEADSET_ANLG|BIT_USB_HEADSET_DGTL| 6820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber BIT_HDMI_AUDIO|BIT_LINEOUT); 6920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 7020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final String NAME_H2W = "h2w"; 7120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final String NAME_USB_AUDIO = "usb_audio"; 7220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private static final String NAME_HDMI_AUDIO = "hdmi_audio"; 731862a33b246249630b654182afb5914da3480d4cAndreas Huber private static final String NAME_HDMI = "hdmi"; 745295c0c55d41a2906ea7f65a3f22e6278cb17d4bAndreas Huber 751862a33b246249630b654182afb5914da3480d4cAndreas Huber private static final int MSG_NEW_DEVICE_STATE = 1; 767a8b0ed6419e57dd8b41d3806893d63d3df91aabJean-Michel Trivi private static final int MSG_SYSTEM_READY = 2; 777a8b0ed6419e57dd8b41d3806893d63d3df91aabJean-Michel Trivi 78ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald private final Object mLock = new Object(); 79ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 8020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private final WakeLock mWakeLock; // held while there is a pending route change 81ccb3506ed1845121b94f4e27244e61a46eb19815Dharmaray Kundargi private final AudioManager mAudioManager; 82693d271e62a3726689ff68f4505ba49228eb94b2Andreas Huber 832799d743ee2ae5a25fe869a7f9c052acc029559fGlenn Kasten private int mHeadsetState; 8420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 8520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private int mSwitchValues; 8620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 8720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private final WiredAccessoryObserver mObserver; 8820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private final InputManagerService mInputManager; 8920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 9020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber private final boolean mUseDevInputEventForAudioJack; 9120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 9220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber public WiredAccessoryManager(Context context, InputManagerService inputManager) { 93e4451a91a61a341014f5eff61db356156c3ecb37Andreas Huber PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); 9420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WiredAccessoryManager"); 9520111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mWakeLock.setReferenceCounted(false); 9620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE); 9720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mInputManager = inputManager; 9820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 991862a33b246249630b654182afb5914da3480d4cAndreas Huber mUseDevInputEventForAudioJack = 1005295c0c55d41a2906ea7f65a3f22e6278cb17d4bAndreas Huber context.getResources().getBoolean(R.bool.config_useDevInputEventForAudioJack); 10120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 10220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mObserver = new WiredAccessoryObserver(); 10320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 10420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 1053c3ddfa39635a2d39f4ee7c966fb9403fe1ec9d8Andreas Huber private void onSystemReady() { 1063c3ddfa39635a2d39f4ee7c966fb9403fe1ec9d8Andreas Huber if (mUseDevInputEventForAudioJack) { 1073c3ddfa39635a2d39f4ee7c966fb9403fe1ec9d8Andreas Huber int switchValues = 0; 1083c3ddfa39635a2d39f4ee7c966fb9403fe1ec9d8Andreas Huber if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_HEADPHONE_INSERT) == 1) { 10920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber switchValues |= SW_HEADPHONE_INSERT_BIT; 110ed54ad0f8619ae416b0968ade6248894cbfc4dbaAndreas Huber } 111a99a5bca365277271915cbaeea811ad87131270dAndreas Huber if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_MICROPHONE_INSERT) == 1) { 11220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber switchValues |= SW_MICROPHONE_INSERT_BIT; 11394ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald } 11494ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_LINEOUT_INSERT) == 1) { 11594ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald switchValues |= SW_LINEOUT_INSERT_BIT; 11694ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald } 117d217a8c4632b3e3065f8c2a26b9ce4dc4c97171fGlenn Kasten notifyWiredAccessoryChanged(0, switchValues, 118d217a8c4632b3e3065f8c2a26b9ce4dc4c97171fGlenn Kasten SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT | SW_LINEOUT_INSERT_BIT); 11920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber } 1207d5b8a70c28c0d5746a600467b2887822dbff88eAndreas Huber 12120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber mObserver.init(); 122ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald } 123ad3af3305f024bcbbd55c894a4995e449498e1baRichard Fitzgerald 12420111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber @Override 1257d5b8a70c28c0d5746a600467b2887822dbff88eAndreas Huber public void notifyWiredAccessoryChanged(long whenNanos, int switchValues, int switchMask) { 12620111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber if (LOG) Slog.v(TAG, "notifyWiredAccessoryChanged: when=" + whenNanos 12720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber + " bits=" + switchCodeToString(switchValues, switchMask) 12820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber + " mask=" + Integer.toHexString(switchMask)); 129b2e3954c94717e43b3dc9b880564f166cfbbc0a2Andreas Huber 130b2e3954c94717e43b3dc9b880564f166cfbbc0a2Andreas Huber synchronized (mLock) { 13184b343f29063fbfa2ee61b2e3d37ba059ca507d4Andreas Huber int headset; 1326f59db12a64f4496866952a251122ccb77a36c6bEric Laurent mSwitchValues = (mSwitchValues & ~switchMask) | switchValues; 13384b343f29063fbfa2ee61b2e3d37ba059ca507d4Andreas Huber switch (mSwitchValues & 13494ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald (SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT | SW_LINEOUT_INSERT_BIT)) { 13594ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald case 0: 13694ea60f975c3eb7ce6d2a4430538a42a5fc3babdRichard Fitzgerald headset = 0; 13720111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber break; 13820111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 13920111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber case SW_HEADPHONE_INSERT_BIT: 14020111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber headset = BIT_HEADSET_NO_MIC; 14120111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber break; 14220111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber 14320111aa043c5f404472bc63b90bc5aad906b1101Andreas Huber case SW_LINEOUT_INSERT_BIT: 144 headset = BIT_LINEOUT; 145 break; 146 147 case SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT: 148 headset = BIT_HEADSET; 149 break; 150 151 case SW_MICROPHONE_INSERT_BIT: 152 headset = BIT_HEADSET; 153 break; 154 155 default: 156 headset = 0; 157 break; 158 } 159 160 updateLocked(NAME_H2W, 161 (mHeadsetState & ~(BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT)) | headset); 162 } 163 } 164 165 @Override 166 public void systemReady() { 167 synchronized (mLock) { 168 mWakeLock.acquire(); 169 170 Message msg = mHandler.obtainMessage(MSG_SYSTEM_READY, 0, 0, null); 171 mHandler.sendMessage(msg); 172 } 173 } 174 175 /** 176 * Compare the existing headset state with the new state and pass along accordingly. Note 177 * that this only supports a single headset at a time. Inserting both a usb and jacked headset 178 * results in support for the last one plugged in. Similarly, unplugging either is seen as 179 * unplugging all. 180 * 181 * @param newName One of the NAME_xxx variables defined above. 182 * @param newState 0 or one of the BIT_xxx variables defined above. 183 */ 184 private void updateLocked(String newName, int newState) { 185 // Retain only relevant bits 186 int headsetState = newState & SUPPORTED_HEADSETS; 187 int usb_headset_anlg = headsetState & BIT_USB_HEADSET_ANLG; 188 int usb_headset_dgtl = headsetState & BIT_USB_HEADSET_DGTL; 189 int h2w_headset = headsetState & (BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT); 190 boolean h2wStateChange = true; 191 boolean usbStateChange = true; 192 if (LOG) Slog.v(TAG, "newName=" + newName 193 + " newState=" + newState 194 + " headsetState=" + headsetState 195 + " prev headsetState=" + mHeadsetState); 196 197 if (mHeadsetState == headsetState) { 198 Log.e(TAG, "No state change."); 199 return; 200 } 201 202 // reject all suspect transitions: only accept state changes from: 203 // - a: 0 headset to 1 headset 204 // - b: 1 headset to 0 headset 205 if (h2w_headset == (BIT_HEADSET | BIT_HEADSET_NO_MIC | BIT_LINEOUT)) { 206 Log.e(TAG, "Invalid combination, unsetting h2w flag"); 207 h2wStateChange = false; 208 } 209 // - c: 0 usb headset to 1 usb headset 210 // - d: 1 usb headset to 0 usb headset 211 if (usb_headset_anlg == BIT_USB_HEADSET_ANLG && usb_headset_dgtl == BIT_USB_HEADSET_DGTL) { 212 Log.e(TAG, "Invalid combination, unsetting usb flag"); 213 usbStateChange = false; 214 } 215 if (!h2wStateChange && !usbStateChange) { 216 Log.e(TAG, "invalid transition, returning ..."); 217 return; 218 } 219 220 mWakeLock.acquire(); 221 222 Message msg = mHandler.obtainMessage(MSG_NEW_DEVICE_STATE, headsetState, 223 mHeadsetState, newName); 224 mHandler.sendMessage(msg); 225 226 mHeadsetState = headsetState; 227 } 228 229 private final Handler mHandler = new Handler(Looper.myLooper(), null, true) { 230 @Override 231 public void handleMessage(Message msg) { 232 switch (msg.what) { 233 case MSG_NEW_DEVICE_STATE: 234 setDevicesState(msg.arg1, msg.arg2, (String)msg.obj); 235 mWakeLock.release(); 236 break; 237 case MSG_SYSTEM_READY: 238 onSystemReady(); 239 mWakeLock.release(); 240 break; 241 } 242 } 243 }; 244 245 private void setDevicesState( 246 int headsetState, int prevHeadsetState, String headsetName) { 247 synchronized (mLock) { 248 int allHeadsets = SUPPORTED_HEADSETS; 249 for (int curHeadset = 1; allHeadsets != 0; curHeadset <<= 1) { 250 if ((curHeadset & allHeadsets) != 0) { 251 setDeviceStateLocked(curHeadset, headsetState, prevHeadsetState, headsetName); 252 allHeadsets &= ~curHeadset; 253 } 254 } 255 } 256 } 257 258 private void setDeviceStateLocked(int headset, 259 int headsetState, int prevHeadsetState, String headsetName) { 260 if ((headsetState & headset) != (prevHeadsetState & headset)) { 261 int outDevice = 0; 262 int inDevice = 0; 263 int state; 264 265 if ((headsetState & headset) != 0) { 266 state = 1; 267 } else { 268 state = 0; 269 } 270 271 if (headset == BIT_HEADSET) { 272 outDevice = AudioManager.DEVICE_OUT_WIRED_HEADSET; 273 inDevice = AudioManager.DEVICE_IN_WIRED_HEADSET; 274 } else if (headset == BIT_HEADSET_NO_MIC){ 275 outDevice = AudioManager.DEVICE_OUT_WIRED_HEADPHONE; 276 } else if (headset == BIT_LINEOUT){ 277 outDevice = AudioManager.DEVICE_OUT_LINE; 278 } else if (headset == BIT_USB_HEADSET_ANLG) { 279 outDevice = AudioManager.DEVICE_OUT_ANLG_DOCK_HEADSET; 280 } else if (headset == BIT_USB_HEADSET_DGTL) { 281 outDevice = AudioManager.DEVICE_OUT_DGTL_DOCK_HEADSET; 282 } else if (headset == BIT_HDMI_AUDIO) { 283 outDevice = AudioManager.DEVICE_OUT_HDMI; 284 } else { 285 Slog.e(TAG, "setDeviceState() invalid headset type: "+headset); 286 return; 287 } 288 289 if (LOG) 290 Slog.v(TAG, "device "+headsetName+((state == 1) ? " connected" : " disconnected")); 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 } 300 301 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; 316 317 public WiredAccessoryObserver() { 318 mUEventInfo = makeObservedUEventList(); 319 } 320 321 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.valueOf((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 } 355 356 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 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 } 416 417 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; 432 433 public UEventInfo(String devName, int state1Bits, int state2Bits, int stateNbits) { 434 mDevName = devName; 435 mState1Bits = state1Bits; 436 mState2Bits = state2Bits; 437 mStateNbits = stateNbits; 438 } 439 440 public String getDevName() { return mDevName; } 441 442 public String getDevPath() { 443 return String.format(Locale.US, "/devices/virtual/switch/%s", mDevName); 444 } 445 446 public String getSwitchStatePath() { 447 return String.format(Locale.US, "/sys/class/switch/%s/state", mDevName); 448 } 449 450 public boolean checkSwitchExists() { 451 File f = new File(getSwitchStatePath()); 452 return f.exists(); 453 } 454 455 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