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diff --git a/modules/input/evdev/InputHost.h b/modules/input/evdev/InputHost.h
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+/*
+ * 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.
+ */
+
+#ifndef ANDROID_INPUT_HOST_H_
+#define ANDROID_INPUT_HOST_H_
+
+#include <hardware/input.h>
+
+namespace android {
+
+/**
+ * Classes in this file wrap the corresponding interfaces in the Input HAL. They
+ * are intended to be lightweight and passed by value. It is still important not
+ * to use an object after a HAL-specific method has freed the underlying
+ * representation.
+ *
+ * See hardware/input.h for details about each of these methods.
+ */
+
+using InputBus = input_bus_t;
+using InputCollectionId = input_collection_id_t;
+using InputDeviceHandle = input_device_handle_t*;
+using InputDeviceIdentifier = input_device_identifier_t*;
+using InputUsage = input_usage_t;
+
+class InputHostBase {
+protected:
+    InputHostBase(input_host_t* host, input_host_callbacks_t cb) : mHost(host), mCallbacks(cb) {}
+    virtual ~InputHostBase() = default;
+
+    input_host_t* mHost;
+    input_host_callbacks_t mCallbacks;
+};
+
+class InputReport : private InputHostBase {
+public:
+    virtual ~InputReport() = default;
+
+    InputReport(const InputReport& rhs) = default;
+    InputReport& operator=(const InputReport& rhs) = default;
+    operator input_report_t*() const { return mReport; }
+
+    void reportEvent(InputDeviceHandle d);
+
+private:
+    friend class InputReportDefinition;
+
+    InputReport(input_host_t* host, input_host_callbacks_t cb, input_report_t* r) :
+        InputHostBase(host, cb), mReport(r) {}
+
+    input_report_t* mReport;
+};
+
+class InputReportDefinition : private InputHostBase {
+public:
+    virtual ~InputReportDefinition() = default;
+
+    InputReportDefinition(const InputReportDefinition& rhs) = default;
+    InputReportDefinition& operator=(const InputReportDefinition& rhs) = default;
+    operator input_report_definition_t*() { return mReportDefinition; }
+
+    void addCollection(InputCollectionId id, int32_t arity);
+    void declareUsage(InputCollectionId id, InputUsage usage, int32_t min, int32_t max,
+            float resolution);
+    void declareUsage(InputCollectionId id, InputUsage* usage, size_t usageCount);
+
+    InputReport allocateReport();
+
+private:
+    friend class InputHost;
+
+    InputReportDefinition(
+            input_host_t* host, input_host_callbacks_t cb, input_report_definition_t* r) :
+        InputHostBase(host, cb), mReportDefinition(r) {}
+
+    input_report_definition_t* mReportDefinition;
+};
+
+class InputDeviceDefinition : private InputHostBase {
+public:
+    virtual ~InputDeviceDefinition() = default;
+
+    InputDeviceDefinition(const InputDeviceDefinition& rhs) = default;
+    InputDeviceDefinition& operator=(const InputDeviceDefinition& rhs) = default;
+    operator input_device_definition_t*() { return mDeviceDefinition; }
+
+    void addReport(InputReportDefinition r);
+
+private:
+    friend class InputHost;
+
+    InputDeviceDefinition(
+            input_host_t* host, input_host_callbacks_t cb, input_device_definition_t* d) :
+        InputHostBase(host, cb), mDeviceDefinition(d) {}
+
+    input_device_definition_t* mDeviceDefinition;
+};
+
+class InputHost : private InputHostBase {
+public:
+    InputHost(input_host_t* host, input_host_callbacks_t cb) : InputHostBase(host, cb) {}
+    virtual ~InputHost() = default;
+
+    InputHost(const InputHost& rhs) = default;
+    InputHost& operator=(const InputHost& rhs) = default;
+
+    InputDeviceIdentifier createDeviceIdentifier(const char* name, int32_t productId,
+            int32_t vendorId, InputBus bus, const char* uniqueId);
+
+    InputDeviceDefinition createDeviceDefinition();
+    InputReportDefinition createInputReportDefinition();
+    InputReportDefinition createOutputReportDefinition();
+
+    InputDeviceHandle registerDevice(InputDeviceIdentifier id, InputDeviceDefinition d);
+    void unregisterDevice(InputDeviceHandle handle);
+};
+
+}  // namespace android
+
+#endif  // ANDROID_INPUT_HOST_H_