Craig Mautner | 2f39e9f | 2012-09-21 11:39:54 -0700 | [diff] [blame] | 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.BroadcastReceiver; |
| 20 | import android.content.Context; |
| 21 | import android.content.Intent; |
| 22 | import android.content.IntentFilter; |
| 23 | import android.os.Handler; |
| 24 | import android.os.Looper; |
| 25 | import android.os.Message; |
| 26 | import android.os.PowerManager; |
| 27 | import android.os.PowerManager.WakeLock; |
| 28 | import android.os.UEventObserver; |
| 29 | import android.util.Slog; |
| 30 | import android.media.AudioManager; |
| 31 | import android.util.Log; |
| 32 | import android.view.InputDevice; |
| 33 | |
| 34 | import com.android.internal.R; |
| 35 | import com.android.server.input.InputManagerService; |
| 36 | import com.android.server.input.InputManagerService.WiredAccessoryCallbacks; |
| 37 | import static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT; |
| 38 | import static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT; |
| 39 | import static com.android.server.input.InputManagerService.SW_HEADPHONE_INSERT_BIT; |
| 40 | import static com.android.server.input.InputManagerService.SW_MICROPHONE_INSERT_BIT; |
| 41 | |
| 42 | import java.io.File; |
| 43 | import java.io.FileReader; |
| 44 | import java.io.FileNotFoundException; |
| 45 | import java.util.ArrayList; |
| 46 | import java.util.List; |
| 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 SUPPORTED_HEADSETS = (BIT_HEADSET|BIT_HEADSET_NO_MIC| |
| 63 | BIT_USB_HEADSET_ANLG|BIT_USB_HEADSET_DGTL| |
| 64 | BIT_HDMI_AUDIO); |
| 65 | |
| 66 | private static final String NAME_H2W = "h2w"; |
| 67 | private static final String NAME_USB_AUDIO = "usb_audio"; |
| 68 | private static final String NAME_HDMI_AUDIO = "hdmi_audio"; |
| 69 | private static final String NAME_HDMI = "hdmi"; |
| 70 | |
| 71 | private static final int MSG_NEW_DEVICE_STATE = 1; |
| 72 | |
| 73 | private final Object mLock = new Object(); |
| 74 | |
| 75 | private final WakeLock mWakeLock; // held while there is a pending route change |
| 76 | private final AudioManager mAudioManager; |
| 77 | |
| 78 | private int mHeadsetState; |
| 79 | |
| 80 | private int mSwitchValues; |
| 81 | |
| 82 | private final WiredAccessoryObserver mObserver; |
| 83 | private final InputManagerService mInputManager; |
| 84 | |
| 85 | private final boolean mUseDevInputEventForAudioJack; |
| 86 | |
| 87 | public WiredAccessoryManager(Context context, InputManagerService inputManager) { |
| 88 | PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); |
| 89 | mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WiredAccessoryManager"); |
| 90 | mWakeLock.setReferenceCounted(false); |
| 91 | mAudioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE); |
| 92 | mInputManager = inputManager; |
| 93 | |
| 94 | mUseDevInputEventForAudioJack = |
| 95 | context.getResources().getBoolean(R.bool.config_useDevInputEventForAudioJack); |
| 96 | |
| 97 | mObserver = new WiredAccessoryObserver(); |
| 98 | |
| 99 | context.registerReceiver(new BroadcastReceiver() { |
| 100 | @Override |
| 101 | public void onReceive(Context ctx, Intent intent) { |
| 102 | bootCompleted(); |
| 103 | } |
| 104 | }, |
| 105 | new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null); |
| 106 | } |
| 107 | |
| 108 | private void bootCompleted() { |
| 109 | if (mUseDevInputEventForAudioJack) { |
| 110 | int switchValues = 0; |
| 111 | if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_HEADPHONE_INSERT) == 1) { |
| 112 | switchValues |= SW_HEADPHONE_INSERT_BIT; |
| 113 | } |
| 114 | if (mInputManager.getSwitchState(-1, InputDevice.SOURCE_ANY, SW_MICROPHONE_INSERT) == 1) { |
| 115 | switchValues |= SW_MICROPHONE_INSERT_BIT; |
| 116 | } |
| 117 | notifyWiredAccessoryChanged(0, switchValues, |
| 118 | SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT); |
| 119 | } |
| 120 | |
| 121 | mObserver.init(); |
| 122 | } |
| 123 | |
| 124 | @Override |
| 125 | public void notifyWiredAccessoryChanged(long whenNanos, int switchValues, int switchMask) { |
| 126 | if (LOG) Slog.v(TAG, "notifyWiredAccessoryChanged: when=" + whenNanos |
| 127 | + " bits=" + switchCodeToString(switchValues, switchMask) |
| 128 | + " mask=" + Integer.toHexString(switchMask)); |
| 129 | |
| 130 | synchronized (mLock) { |
| 131 | int headset; |
| 132 | mSwitchValues = (mSwitchValues & ~switchMask) | switchValues; |
| 133 | switch (mSwitchValues & (SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT)) { |
| 134 | case 0: |
| 135 | headset = 0; |
| 136 | break; |
| 137 | |
| 138 | case SW_HEADPHONE_INSERT_BIT: |
| 139 | headset = BIT_HEADSET_NO_MIC; |
| 140 | break; |
| 141 | |
| 142 | case SW_HEADPHONE_INSERT_BIT | SW_MICROPHONE_INSERT_BIT: |
| 143 | headset = BIT_HEADSET; |
| 144 | break; |
| 145 | |
| 146 | case SW_MICROPHONE_INSERT_BIT: |
| 147 | headset = BIT_HEADSET; |
| 148 | break; |
| 149 | |
| 150 | default: |
| 151 | headset = 0; |
| 152 | break; |
| 153 | } |
| 154 | |
Eric Laurent | 9e6e835 | 2012-10-09 16:41:32 -0700 | [diff] [blame^] | 155 | updateLocked(NAME_H2W, (mHeadsetState & ~(BIT_HEADSET | BIT_HEADSET_NO_MIC)) | headset); |
Craig Mautner | 2f39e9f | 2012-09-21 11:39:54 -0700 | [diff] [blame] | 156 | } |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * Compare the existing headset state with the new state and pass along accordingly. Note |
| 161 | * that this only supports a single headset at a time. Inserting both a usb and jacked headset |
| 162 | * results in support for the last one plugged in. Similarly, unplugging either is seen as |
| 163 | * unplugging all. |
| 164 | * |
| 165 | * @param newName One of the NAME_xxx variables defined above. |
| 166 | * @param newState 0 or one of the BIT_xxx variables defined above. |
| 167 | */ |
| 168 | private void updateLocked(String newName, int newState) { |
| 169 | // Retain only relevant bits |
| 170 | int headsetState = newState & SUPPORTED_HEADSETS; |
| 171 | int usb_headset_anlg = headsetState & BIT_USB_HEADSET_ANLG; |
| 172 | int usb_headset_dgtl = headsetState & BIT_USB_HEADSET_DGTL; |
| 173 | int h2w_headset = headsetState & (BIT_HEADSET | BIT_HEADSET_NO_MIC); |
| 174 | boolean h2wStateChange = true; |
| 175 | boolean usbStateChange = true; |
| 176 | if (LOG) Slog.v(TAG, "newName=" + newName |
| 177 | + " newState=" + newState |
| 178 | + " headsetState=" + headsetState |
| 179 | + " prev headsetState=" + mHeadsetState); |
| 180 | |
| 181 | if (mHeadsetState == headsetState) { |
| 182 | Log.e(TAG, "No state change."); |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | // reject all suspect transitions: only accept state changes from: |
| 187 | // - a: 0 headset to 1 headset |
| 188 | // - b: 1 headset to 0 headset |
| 189 | if (h2w_headset == (BIT_HEADSET | BIT_HEADSET_NO_MIC)) { |
| 190 | Log.e(TAG, "Invalid combination, unsetting h2w flag"); |
| 191 | h2wStateChange = false; |
| 192 | } |
| 193 | // - c: 0 usb headset to 1 usb headset |
| 194 | // - d: 1 usb headset to 0 usb headset |
| 195 | if (usb_headset_anlg == BIT_USB_HEADSET_ANLG && usb_headset_dgtl == BIT_USB_HEADSET_DGTL) { |
| 196 | Log.e(TAG, "Invalid combination, unsetting usb flag"); |
| 197 | usbStateChange = false; |
| 198 | } |
| 199 | if (!h2wStateChange && !usbStateChange) { |
| 200 | Log.e(TAG, "invalid transition, returning ..."); |
| 201 | return; |
| 202 | } |
| 203 | |
| 204 | mWakeLock.acquire(); |
| 205 | |
| 206 | Message msg = mHandler.obtainMessage(MSG_NEW_DEVICE_STATE, headsetState, |
| 207 | mHeadsetState, newName); |
| 208 | mHandler.sendMessage(msg); |
| 209 | |
| 210 | mHeadsetState = headsetState; |
| 211 | } |
| 212 | |
| 213 | private final Handler mHandler = new Handler(Looper.myLooper(), null, true) { |
| 214 | @Override |
| 215 | public void handleMessage(Message msg) { |
| 216 | switch (msg.what) { |
| 217 | case MSG_NEW_DEVICE_STATE: |
| 218 | setDevicesState(msg.arg1, msg.arg2, (String)msg.obj); |
| 219 | mWakeLock.release(); |
| 220 | } |
| 221 | } |
| 222 | }; |
| 223 | |
| 224 | private void setDevicesState( |
| 225 | int headsetState, int prevHeadsetState, String headsetName) { |
| 226 | synchronized (mLock) { |
| 227 | int allHeadsets = SUPPORTED_HEADSETS; |
| 228 | for (int curHeadset = 1; allHeadsets != 0; curHeadset <<= 1) { |
| 229 | if ((curHeadset & allHeadsets) != 0) { |
| 230 | setDeviceStateLocked(curHeadset, headsetState, prevHeadsetState, headsetName); |
| 231 | allHeadsets &= ~curHeadset; |
| 232 | } |
| 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | private void setDeviceStateLocked(int headset, |
| 238 | int headsetState, int prevHeadsetState, String headsetName) { |
| 239 | if ((headsetState & headset) != (prevHeadsetState & headset)) { |
| 240 | int device; |
| 241 | int state; |
| 242 | |
| 243 | if ((headsetState & headset) != 0) { |
| 244 | state = 1; |
| 245 | } else { |
| 246 | state = 0; |
| 247 | } |
| 248 | |
| 249 | if (headset == BIT_HEADSET) { |
| 250 | device = AudioManager.DEVICE_OUT_WIRED_HEADSET; |
| 251 | } else if (headset == BIT_HEADSET_NO_MIC){ |
| 252 | device = AudioManager.DEVICE_OUT_WIRED_HEADPHONE; |
| 253 | } else if (headset == BIT_USB_HEADSET_ANLG) { |
| 254 | device = AudioManager.DEVICE_OUT_ANLG_DOCK_HEADSET; |
| 255 | } else if (headset == BIT_USB_HEADSET_DGTL) { |
| 256 | device = AudioManager.DEVICE_OUT_DGTL_DOCK_HEADSET; |
| 257 | } else if (headset == BIT_HDMI_AUDIO) { |
| 258 | device = AudioManager.DEVICE_OUT_AUX_DIGITAL; |
| 259 | } else { |
| 260 | Slog.e(TAG, "setDeviceState() invalid headset type: "+headset); |
| 261 | return; |
| 262 | } |
| 263 | |
| 264 | if (LOG) |
| 265 | Slog.v(TAG, "device "+headsetName+((state == 1) ? " connected" : " disconnected")); |
| 266 | |
| 267 | mAudioManager.setWiredDeviceConnectionState(device, state, headsetName); |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | private String switchCodeToString(int switchValues, int switchMask) { |
| 272 | StringBuffer sb = new StringBuffer(); |
| 273 | if ((switchMask & SW_HEADPHONE_INSERT_BIT) != 0 && |
| 274 | (switchValues & SW_HEADPHONE_INSERT_BIT) != 0) { |
| 275 | sb.append("SW_HEADPHONE_INSERT "); |
| 276 | } |
| 277 | if ((switchMask & SW_MICROPHONE_INSERT_BIT) != 0 && |
| 278 | (switchValues & SW_MICROPHONE_INSERT_BIT) != 0) { |
| 279 | sb.append("SW_MICROPHONE_INSERT"); |
| 280 | } |
| 281 | return sb.toString(); |
| 282 | } |
| 283 | |
| 284 | class WiredAccessoryObserver extends UEventObserver { |
| 285 | private final List<UEventInfo> mUEventInfo; |
| 286 | |
| 287 | public WiredAccessoryObserver() { |
| 288 | mUEventInfo = makeObservedUEventList(); |
| 289 | } |
| 290 | |
| 291 | void init() { |
| 292 | synchronized (mLock) { |
| 293 | if (LOG) Slog.v(TAG, "init()"); |
| 294 | char[] buffer = new char[1024]; |
| 295 | |
| 296 | for (int i = 0; i < mUEventInfo.size(); ++i) { |
| 297 | UEventInfo uei = mUEventInfo.get(i); |
| 298 | try { |
| 299 | int curState; |
| 300 | FileReader file = new FileReader(uei.getSwitchStatePath()); |
| 301 | int len = file.read(buffer, 0, 1024); |
| 302 | file.close(); |
| 303 | curState = Integer.valueOf((new String(buffer, 0, len)).trim()); |
| 304 | |
| 305 | if (curState > 0) { |
| 306 | updateStateLocked(uei.getDevPath(), uei.getDevName(), curState); |
| 307 | } |
| 308 | } catch (FileNotFoundException e) { |
| 309 | Slog.w(TAG, uei.getSwitchStatePath() + |
| 310 | " not found while attempting to determine initial switch state"); |
| 311 | } catch (Exception e) { |
| 312 | Slog.e(TAG, "" , e); |
| 313 | } |
| 314 | } |
| 315 | } |
| 316 | |
| 317 | // At any given time accessories could be inserted |
| 318 | // one on the board, one on the dock and one on HDMI: |
| 319 | // observe three UEVENTs |
| 320 | for (int i = 0; i < mUEventInfo.size(); ++i) { |
| 321 | UEventInfo uei = mUEventInfo.get(i); |
| 322 | startObserving("DEVPATH="+uei.getDevPath()); |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | private List<UEventInfo> makeObservedUEventList() { |
| 327 | List<UEventInfo> retVal = new ArrayList<UEventInfo>(); |
| 328 | UEventInfo uei; |
| 329 | |
| 330 | // Monitor h2w |
| 331 | if (!mUseDevInputEventForAudioJack) { |
| 332 | uei = new UEventInfo(NAME_H2W, BIT_HEADSET, BIT_HEADSET_NO_MIC); |
| 333 | if (uei.checkSwitchExists()) { |
| 334 | retVal.add(uei); |
| 335 | } else { |
| 336 | Slog.w(TAG, "This kernel does not have wired headset support"); |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | // Monitor USB |
| 341 | uei = new UEventInfo(NAME_USB_AUDIO, BIT_USB_HEADSET_ANLG, BIT_USB_HEADSET_DGTL); |
| 342 | if (uei.checkSwitchExists()) { |
| 343 | retVal.add(uei); |
| 344 | } else { |
| 345 | Slog.w(TAG, "This kernel does not have usb audio support"); |
| 346 | } |
| 347 | |
| 348 | // Monitor HDMI |
| 349 | // |
| 350 | // If the kernel has support for the "hdmi_audio" switch, use that. It will be |
| 351 | // signalled only when the HDMI driver has a video mode configured, and the downstream |
| 352 | // sink indicates support for audio in its EDID. |
| 353 | // |
| 354 | // If the kernel does not have an "hdmi_audio" switch, just fall back on the older |
| 355 | // "hdmi" switch instead. |
| 356 | uei = new UEventInfo(NAME_HDMI_AUDIO, BIT_HDMI_AUDIO, 0); |
| 357 | if (uei.checkSwitchExists()) { |
| 358 | retVal.add(uei); |
| 359 | } else { |
| 360 | uei = new UEventInfo(NAME_HDMI, BIT_HDMI_AUDIO, 0); |
| 361 | if (uei.checkSwitchExists()) { |
| 362 | retVal.add(uei); |
| 363 | } else { |
| 364 | Slog.w(TAG, "This kernel does not have HDMI audio support"); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | return retVal; |
| 369 | } |
| 370 | |
| 371 | @Override |
| 372 | public void onUEvent(UEventObserver.UEvent event) { |
| 373 | if (LOG) Slog.v(TAG, "Headset UEVENT: " + event.toString()); |
| 374 | |
| 375 | try { |
| 376 | String devPath = event.get("DEVPATH"); |
| 377 | String name = event.get("SWITCH_NAME"); |
| 378 | int state = Integer.parseInt(event.get("SWITCH_STATE")); |
| 379 | synchronized (mLock) { |
| 380 | updateStateLocked(devPath, name, state); |
| 381 | } |
| 382 | } catch (NumberFormatException e) { |
| 383 | Slog.e(TAG, "Could not parse switch state from event " + event); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | private void updateStateLocked(String devPath, String name, int state) { |
| 388 | for (int i = 0; i < mUEventInfo.size(); ++i) { |
| 389 | UEventInfo uei = mUEventInfo.get(i); |
| 390 | if (devPath.equals(uei.getDevPath())) { |
| 391 | updateLocked(name, uei.computeNewHeadsetState(mHeadsetState, state)); |
| 392 | return; |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | private final class UEventInfo { |
| 398 | private final String mDevName; |
| 399 | private final int mState1Bits; |
| 400 | private final int mState2Bits; |
| 401 | |
| 402 | public UEventInfo(String devName, int state1Bits, int state2Bits) { |
| 403 | mDevName = devName; |
| 404 | mState1Bits = state1Bits; |
| 405 | mState2Bits = state2Bits; |
| 406 | } |
| 407 | |
| 408 | public String getDevName() { return mDevName; } |
| 409 | |
| 410 | public String getDevPath() { |
| 411 | return String.format("/devices/virtual/switch/%s", mDevName); |
| 412 | } |
| 413 | |
| 414 | public String getSwitchStatePath() { |
| 415 | return String.format("/sys/class/switch/%s/state", mDevName); |
| 416 | } |
| 417 | |
| 418 | public boolean checkSwitchExists() { |
| 419 | File f = new File(getSwitchStatePath()); |
| 420 | return f.exists(); |
| 421 | } |
| 422 | |
| 423 | public int computeNewHeadsetState(int headsetState, int switchState) { |
| 424 | int preserveMask = ~(mState1Bits | mState2Bits); |
| 425 | int setBits = ((switchState == 1) ? mState1Bits : |
| 426 | ((switchState == 2) ? mState2Bits : 0)); |
| 427 | |
| 428 | return ((headsetState & preserveMask) | setBits); |
| 429 | } |
| 430 | } |
| 431 | } |
| 432 | } |