diff --git a/modules/input/evdev/MouseInputMapper.cpp b/modules/input/evdev/MouseInputMapper.cpp
new file mode 100644
index 0000000..453edde
--- /dev/null
+++ b/modules/input/evdev/MouseInputMapper.cpp
@@ -0,0 +1,184 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "MouseInputMapper"
+//#define LOG_NDEBUG 0
+
+#include "MouseInputMapper.h"
+
+#include <linux/input.h>
+#include <hardware/input.h>
+#include <utils/Log.h>
+#include <utils/misc.h>
+
+#include "InputHost.h"
+#include "InputHub.h"
+
+
+namespace android {
+
+// Map scancodes to input HAL usages.
+// The order of these definitions MUST remain in sync with the order they are
+// defined in linux/input.h.
+static struct {
+    int32_t scancode;
+    InputUsage usage;
+} codeMap[] = {
+    {BTN_LEFT, INPUT_USAGE_BUTTON_PRIMARY},
+    {BTN_RIGHT, INPUT_USAGE_BUTTON_SECONDARY},
+    {BTN_MIDDLE, INPUT_USAGE_BUTTON_TERTIARY},
+    {BTN_SIDE, INPUT_USAGE_BUTTON_UNKNOWN},
+    {BTN_EXTRA, INPUT_USAGE_BUTTON_UNKNOWN},
+    {BTN_FORWARD, INPUT_USAGE_BUTTON_FORWARD},
+    {BTN_BACK, INPUT_USAGE_BUTTON_BACK},
+    {BTN_TASK, INPUT_USAGE_BUTTON_UNKNOWN},
+};
+
+
+bool MouseInputMapper::configureInputReport(InputDeviceNode* devNode,
+        InputReportDefinition* report) {
+    setInputReportDefinition(report);
+    getInputReportDefinition()->addCollection(INPUT_COLLECTION_ID_MOUSE, 1);
+
+    // Configure mouse axes
+    if (!devNode->hasRelativeAxis(REL_X) || !devNode->hasRelativeAxis(REL_Y)) {
+        ALOGE("Device %s is missing a relative x or y axis. Device cannot be configured.",
+                devNode->getPath().c_str());
+        return false;
+    }
+    getInputReportDefinition()->declareUsage(INPUT_COLLECTION_ID_MOUSE, INPUT_USAGE_AXIS_X,
+            INT32_MIN, INT32_MAX, 1.0f);
+    getInputReportDefinition()->declareUsage(INPUT_COLLECTION_ID_MOUSE, INPUT_USAGE_AXIS_Y,
+            INT32_MIN, INT32_MAX, 1.0f);
+    if (devNode->hasRelativeAxis(REL_WHEEL)) {
+        getInputReportDefinition()->declareUsage(INPUT_COLLECTION_ID_MOUSE,
+                INPUT_USAGE_AXIS_VSCROLL, -1, 1, 0.0f);
+    }
+    if (devNode->hasRelativeAxis(REL_HWHEEL)) {
+        getInputReportDefinition()->declareUsage(INPUT_COLLECTION_ID_MOUSE,
+                INPUT_USAGE_AXIS_HSCROLL, -1, 1, 0.0f);
+    }
+
+    // Configure mouse buttons
+    InputUsage usages[NELEM(codeMap)];
+    int numUsages = 0;
+    for (int32_t i = 0; i < NELEM(codeMap); ++i) {
+        if (devNode->hasKey(codeMap[i].scancode)) {
+            usages[numUsages++] = codeMap[i].usage;
+        }
+    }
+    if (numUsages == 0) {
+        ALOGW("MouseInputMapper found no buttons for %s", devNode->getPath().c_str());
+    }
+    getInputReportDefinition()->declareUsages(INPUT_COLLECTION_ID_MOUSE, usages, numUsages);
+    return true;
+}
+
+void MouseInputMapper::process(const InputEvent& event) {
+    ALOGD("processing mouse event. type=%d code=%d value=%d",
+            event.type, event.code, event.value);
+    switch (event.type) {
+        case EV_KEY:
+            processButton(event.code, event.value);
+            break;
+        case EV_REL:
+            processMotion(event.code, event.value);
+            break;
+        case EV_SYN:
+            if (event.code == SYN_REPORT) {
+                sync(event.when);
+            }
+            break;
+        default:
+            ALOGD("unknown mouse event type: %d", event.type);
+    }
+}
+
+void MouseInputMapper::processMotion(int32_t code, int32_t value) {
+    switch (code) {
+        case REL_X:
+            mRelX = value;
+            break;
+        case REL_Y:
+            mRelY = value;
+            break;
+        case REL_WHEEL:
+            mRelWheel = value;
+            break;
+        case REL_HWHEEL:
+            mRelHWheel = value;
+            break;
+        default:
+            // Unknown code. Ignore.
+            break;
+    }
+}
+
+// Map evdev button codes to bit indices. This function assumes code >=
+// BTN_MOUSE.
+uint32_t buttonToBit(int32_t code) {
+    return static_cast<uint32_t>(code - BTN_MOUSE);
+}
+
+void MouseInputMapper::processButton(int32_t code, int32_t value) {
+    // Mouse buttons start at BTN_MOUSE and end before BTN_JOYSTICK. There isn't
+    // really enough room after the mouse buttons for another button class, so
+    // the risk of a button type being inserted after mouse is low.
+    if (code >= BTN_MOUSE && code < BTN_JOYSTICK) {
+        if (value) {
+            mButtonValues.markBit(buttonToBit(code));
+        } else {
+            mButtonValues.clearBit(buttonToBit(code));
+        }
+        mUpdatedButtonMask.markBit(buttonToBit(code));
+    }
+}
+
+void MouseInputMapper::sync(nsecs_t when) {
+    // Process updated button states.
+    while (!mUpdatedButtonMask.isEmpty()) {
+        auto bit = mUpdatedButtonMask.clearFirstMarkedBit();
+        getInputReport()->setBoolUsage(INPUT_COLLECTION_ID_MOUSE, codeMap[bit].usage,
+                mButtonValues.hasBit(bit), 0);
+    }
+
+    // Process motion and scroll changes.
+    if (mRelX != 0) {
+        getInputReport()->setIntUsage(INPUT_COLLECTION_ID_MOUSE, INPUT_USAGE_AXIS_X, mRelX, 0);
+    }
+    if (mRelY != 0) {
+        getInputReport()->setIntUsage(INPUT_COLLECTION_ID_MOUSE, INPUT_USAGE_AXIS_Y, mRelY, 0);
+    }
+    if (mRelWheel != 0) {
+        getInputReport()->setIntUsage(INPUT_COLLECTION_ID_MOUSE, INPUT_USAGE_AXIS_VSCROLL,
+                mRelWheel, 0);
+    }
+    if (mRelHWheel != 0) {
+        getInputReport()->setIntUsage(INPUT_COLLECTION_ID_MOUSE, INPUT_USAGE_AXIS_HSCROLL,
+                mRelHWheel, 0);
+    }
+
+    // Report and reset.
+    getInputReport()->reportEvent(getDeviceHandle());
+    mUpdatedButtonMask.clear();
+    mButtonValues.clear();
+    mRelX = 0;
+    mRelY = 0;
+    mRelWheel = 0;
+    mRelHWheel = 0;
+}
+
+}  // namespace android