Revert "inputflinger: Initial support for rotary encoders."

This reverts commit ac72bbf4e46d6689070df09a25db2960a9036eb2.
diff --git a/include/android/input.h b/include/android/input.h
index 5eeb7fc..5ab4e29 100644
--- a/include/android/input.h
+++ b/include/android/input.h
@@ -644,13 +644,6 @@
      */
     AMOTION_EVENT_AXIS_TILT = 25,
     /**
-     * Axis constant:  Generic scroll axis of a motion event.
-     *
-     * - This is used for scroll axis motion events that can't be classified as strictly
-     *   vertical or horizontal. The movement of a rotating scroller is an example of this.
-     */
-    AMOTION_EVENT_AXIS_SCROLL = 26,
-    /**
      * Axis constant: Generic 1 axis of a motion event.
      * The interpretation of a generic axis is device-specific.
      */
@@ -824,8 +817,6 @@
     AINPUT_SOURCE_TOUCH_NAVIGATION = 0x00200000 | AINPUT_SOURCE_CLASS_NONE,
     /** joystick */
     AINPUT_SOURCE_JOYSTICK = 0x01000000 | AINPUT_SOURCE_CLASS_JOYSTICK,
-    /** rotary encoder */
-    AINPUT_SOURCE_ROTARY_ENCODER = 0x00400000 | AINPUT_SOURCE_CLASS_NONE,
 
     /** any */
     AINPUT_SOURCE_ANY = 0xffffff00,
diff --git a/services/inputflinger/EventHub.cpp b/services/inputflinger/EventHub.cpp
index 2a53dec..5859606 100644
--- a/services/inputflinger/EventHub.cpp
+++ b/services/inputflinger/EventHub.cpp
@@ -1191,15 +1191,6 @@
         device->classes |= INPUT_DEVICE_CLASS_CURSOR;
     }
 
-    // See if this is a rotary encoder type device.
-    String8 deviceType = String8();
-    if (device->configuration &&
-        device->configuration->tryGetProperty(String8("device.type"), deviceType)) {
-            if (!deviceType.compare(String8("rotaryEncoder"))) {
-                device->classes |= INPUT_DEVICE_CLASS_ROTARY_ENCODER;
-            }
-    }
-
     // See if this is a touch pad.
     // Is this a new modern multi-touch driver?
     if (test_bit(ABS_MT_POSITION_X, device->absBitmask)
diff --git a/services/inputflinger/EventHub.h b/services/inputflinger/EventHub.h
index 6869253..0f94c77 100644
--- a/services/inputflinger/EventHub.h
+++ b/services/inputflinger/EventHub.h
@@ -137,9 +137,6 @@
     /* The input device is an external stylus (has data we want to fuse with touch data). */
     INPUT_DEVICE_CLASS_EXTERNAL_STYLUS = 0x00000800,
 
-    /* The input device has a rotary encoder */
-    INPUT_DEVICE_CLASS_ROTARY_ENCODER = 0x00001000,
-
     /* The input device is virtual (not a real device, not part of UI configuration). */
     INPUT_DEVICE_CLASS_VIRTUAL       = 0x40000000,
 
diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 3ba38b5..b2cbfe8 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -450,11 +450,6 @@
         device->addMapper(new SwitchInputMapper(device));
     }
 
-    // Scroll wheel-like devices.
-    if (classes & INPUT_DEVICE_CLASS_ROTARY_ENCODER) {
-        device->addMapper(new RotaryEncoderInputMapper(device));
-    }
-
     // Vibrator-like devices.
     if (classes & INPUT_DEVICE_CLASS_VIBRATOR) {
         device->addMapper(new VibratorInputMapper(device));
@@ -2733,92 +2728,6 @@
     }
 }
 
-// --- RotaryEncoderInputMapper ---
-
-RotaryEncoderInputMapper::RotaryEncoderInputMapper(InputDevice* device) :
-        InputMapper(device) {
-    mSource = AINPUT_SOURCE_ROTARY_ENCODER;
-}
-
-RotaryEncoderInputMapper::~RotaryEncoderInputMapper() {
-}
-
-uint32_t RotaryEncoderInputMapper::getSources() {
-    return mSource;
-}
-
-void RotaryEncoderInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
-    InputMapper::populateDeviceInfo(info);
-
-    if (mRotaryEncoderScrollAccumulator.haveRelativeVWheel()) {
-        info->addMotionRange(AMOTION_EVENT_AXIS_SCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f);
-    }
-}
-
-void RotaryEncoderInputMapper::dump(String8& dump) {
-    dump.append(INDENT2 "Rotary Encoder Input Mapper:\n");
-    dump.appendFormat(INDENT3 "HaveWheel: %s\n",
-            toString(mRotaryEncoderScrollAccumulator.haveRelativeVWheel()));
-}
-
-void RotaryEncoderInputMapper::configure(nsecs_t when,
-        const InputReaderConfiguration* config, uint32_t changes) {
-    InputMapper::configure(when, config, changes);
-    if (!changes) {
-        mRotaryEncoderScrollAccumulator.configure(getDevice());
-    }
-}
-
-void RotaryEncoderInputMapper::reset(nsecs_t when) {
-    mRotaryEncoderScrollAccumulator.reset(getDevice());
-
-    InputMapper::reset(when);
-}
-
-void RotaryEncoderInputMapper::process(const RawEvent* rawEvent) {
-    mRotaryEncoderScrollAccumulator.process(rawEvent);
-
-    if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
-        sync(rawEvent->when);
-    }
-}
-
-void RotaryEncoderInputMapper::sync(nsecs_t when) {
-    PointerCoords pointerCoords;
-    pointerCoords.clear();
-
-    PointerProperties pointerProperties;
-    pointerProperties.clear();
-    pointerProperties.id = 0;
-    pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
-
-    float scroll = mRotaryEncoderScrollAccumulator.getRelativeVWheel();
-    bool scrolled = scroll != 0;
-
-    // This is not a pointer, so it's not associated with a display.
-    int32_t displayId = ADISPLAY_ID_NONE;
-
-    // Moving the rotary encoder should wake the device (if specified).
-    uint32_t policyFlags = 0;
-    if (scrolled && getDevice()->isExternal()) {
-        policyFlags |= POLICY_FLAG_WAKE;
-    }
-
-    // Send motion event.
-    if (scrolled) {
-        int32_t metaState = mContext->getGlobalMetaState();
-        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_SCROLL, scroll);
-
-        NotifyMotionArgs scrollArgs(when, getDeviceId(), mSource, policyFlags,
-                AMOTION_EVENT_ACTION_SCROLL, 0, 0, metaState, 0,
-                AMOTION_EVENT_EDGE_FLAG_NONE,
-                displayId, 1, &pointerProperties, &pointerCoords,
-                0, 0, 0);
-        getListener()->notifyMotion(&scrollArgs);
-    }
-
-    mRotaryEncoderScrollAccumulator.finishSync();
-}
 
 // --- TouchInputMapper ---
 
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index 3e931fe..30c84b1 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -1231,26 +1231,6 @@
 };
 
 
-class RotaryEncoderInputMapper : public InputMapper {
-public:
-    RotaryEncoderInputMapper(InputDevice* device);
-    virtual ~RotaryEncoderInputMapper();
-
-    virtual uint32_t getSources();
-    virtual void populateDeviceInfo(InputDeviceInfo* deviceInfo);
-    virtual void dump(String8& dump);
-    virtual void configure(nsecs_t when, const InputReaderConfiguration* config, uint32_t changes);
-    virtual void reset(nsecs_t when);
-    virtual void process(const RawEvent* rawEvent);
-
-private:
-    CursorScrollAccumulator mRotaryEncoderScrollAccumulator;
-
-    int32_t mSource;
-
-    void sync(nsecs_t when);
-};
-
 class TouchInputMapper : public InputMapper {
 public:
     TouchInputMapper(InputDevice* device);