diff --git a/wifi/1.6/default/wifi.h b/wifi/1.6/default/wifi.h
new file mode 100644
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--- /dev/null
+++ b/wifi/1.6/default/wifi.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2016 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 WIFI_H_
+#define WIFI_H_
+
+// HACK: NAN is a macro defined in math.h, which can be included in various
+// headers. This wifi HAL uses an enum called NAN, which does not compile when
+// the macro is defined. Undefine NAN to work around it.
+#undef NAN
+#include <android/hardware/wifi/1.6/IWifi.h>
+
+#include <android-base/macros.h>
+#include <utils/Looper.h>
+#include <functional>
+
+#include "hidl_callback_util.h"
+#include "wifi_chip.h"
+#include "wifi_feature_flags.h"
+#include "wifi_legacy_hal.h"
+#include "wifi_legacy_hal_factory.h"
+#include "wifi_mode_controller.h"
+
+namespace android {
+namespace hardware {
+namespace wifi {
+namespace V1_6 {
+namespace implementation {
+
+/**
+ * Root HIDL interface object used to control the Wifi HAL.
+ */
+class Wifi : public V1_6::IWifi {
+  public:
+    Wifi(const std::shared_ptr<wifi_system::InterfaceTool> iface_tool,
+         const std::shared_ptr<legacy_hal::WifiLegacyHalFactory> legacy_hal_factory,
+         const std::shared_ptr<mode_controller::WifiModeController> mode_controller,
+         const std::shared_ptr<feature_flags::WifiFeatureFlags> feature_flags);
+
+    bool isValid();
+
+    // HIDL methods exposed.
+    Return<void> registerEventCallback(const sp<V1_0::IWifiEventCallback>& event_callback,
+                                       registerEventCallback_cb hidl_status_cb) override;
+    Return<void> registerEventCallback_1_5(const sp<V1_5::IWifiEventCallback>& event_callback,
+                                           registerEventCallback_1_5_cb hidl_status_cb) override;
+    Return<bool> isStarted() override;
+    Return<void> start(start_cb hidl_status_cb) override;
+    Return<void> stop(stop_cb hidl_status_cb) override;
+    Return<void> getChipIds(getChipIds_cb hidl_status_cb) override;
+    Return<void> getChip(ChipId chip_id, getChip_cb hidl_status_cb) override;
+    Return<void> debug(const hidl_handle& handle, const hidl_vec<hidl_string>& options) override;
+
+  private:
+    enum class RunState { STOPPED, STARTED, STOPPING };
+
+    // Corresponding worker functions for the HIDL methods.
+    WifiStatus registerEventCallbackInternal(
+            const sp<V1_0::IWifiEventCallback>& event_callback __unused);
+    WifiStatus registerEventCallbackInternal_1_5(
+            const sp<V1_5::IWifiEventCallback>& event_callback);
+    WifiStatus startInternal();
+    WifiStatus stopInternal(std::unique_lock<std::recursive_mutex>* lock);
+    std::pair<WifiStatus, std::vector<ChipId>> getChipIdsInternal();
+    std::pair<WifiStatus, sp<V1_4::IWifiChip>> getChipInternal(ChipId chip_id);
+
+    WifiStatus initializeModeControllerAndLegacyHal();
+    WifiStatus stopLegacyHalAndDeinitializeModeController(
+            std::unique_lock<std::recursive_mutex>* lock);
+    ChipId getChipIdFromWifiChip(sp<WifiChip>& chip);
+
+    // Instance is created in this root level |IWifi| HIDL interface object
+    // and shared with all the child HIDL interface objects.
+    std::shared_ptr<wifi_system::InterfaceTool> iface_tool_;
+    std::shared_ptr<legacy_hal::WifiLegacyHalFactory> legacy_hal_factory_;
+    std::shared_ptr<mode_controller::WifiModeController> mode_controller_;
+    std::vector<std::shared_ptr<legacy_hal::WifiLegacyHal>> legacy_hals_;
+    std::shared_ptr<feature_flags::WifiFeatureFlags> feature_flags_;
+    RunState run_state_;
+    std::vector<sp<WifiChip>> chips_;
+    hidl_callback_util::HidlCallbackHandler<V1_5::IWifiEventCallback> event_cb_handler_;
+
+    DISALLOW_COPY_AND_ASSIGN(Wifi);
+};
+
+}  // namespace implementation
+}  // namespace V1_6
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android
+
+#endif  // WIFI_H_