diff --git a/gnss/1.0/default/Gnss.cpp b/gnss/1.0/default/Gnss.cpp
new file mode 100644
index 0000000..37810be
--- /dev/null
+++ b/gnss/1.0/default/Gnss.cpp
@@ -0,0 +1,569 @@
+/*
+ * 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.
+ */
+
+#define LOG_TAG "GnssHAL_GnssInterface"
+
+#include "Gnss.h"
+#include <GnssUtils.h>
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace V1_0 {
+namespace implementation {
+
+std::vector<std::unique_ptr<ThreadFuncArgs>> Gnss::sThreadFuncArgsList;
+sp<IGnssCallback> Gnss::sGnssCbIface = nullptr;
+bool Gnss::sInterfaceExists = false;
+
+GpsCallbacks Gnss::sGnssCb = {
+    .size = sizeof(GpsCallbacks),
+    .location_cb = locationCb,
+    .status_cb = statusCb,
+    .sv_status_cb = gpsSvStatusCb,
+    .nmea_cb = nmeaCb,
+    .set_capabilities_cb = setCapabilitiesCb,
+    .acquire_wakelock_cb = acquireWakelockCb,
+    .release_wakelock_cb = releaseWakelockCb,
+    .create_thread_cb = createThreadCb,
+    .request_utc_time_cb = requestUtcTimeCb,
+    .set_system_info_cb = setSystemInfoCb,
+    .gnss_sv_status_cb = gnssSvStatusCb,
+};
+
+Gnss::Gnss(gps_device_t* gnssDevice) {
+    /* Error out if an instance of the interface already exists. */
+    LOG_ALWAYS_FATAL_IF(sInterfaceExists);
+    sInterfaceExists = true;
+
+    if (gnssDevice == nullptr) {
+        ALOGE("%s: Invalid device_t handle", __func__);
+        return;
+    }
+
+    mGnssIface = gnssDevice->get_gps_interface(gnssDevice);
+}
+
+Gnss::~Gnss() {
+    sThreadFuncArgsList.clear();
+}
+
+void Gnss::locationCb(GpsLocation* location) {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    if (location == nullptr) {
+        ALOGE("%s: Invalid location from GNSS HAL", __func__);
+        return;
+    }
+
+    android::hardware::gnss::V1_0::GnssLocation gnssLocation = convertToGnssLocation(location);
+    sGnssCbIface->gnssLocationCb(gnssLocation);
+}
+
+void Gnss::statusCb(GpsStatus* gnssStatus) {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    if (gnssStatus == nullptr) {
+        ALOGE("%s: Invalid GpsStatus from GNSS HAL", __func__);
+        return;
+    }
+
+    IGnssCallback::GnssStatusValue status =
+            static_cast<IGnssCallback::GnssStatusValue>(gnssStatus->status);
+
+    sGnssCbIface->gnssStatusCb(status);
+}
+
+void Gnss::gnssSvStatusCb(GnssSvStatus* status) {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    if (status == nullptr) {
+        ALOGE("Invalid status from GNSS HAL %s", __func__);
+        return;
+    }
+
+    IGnssCallback::GnssSvStatus svStatus;
+    svStatus.numSvs = status->num_svs;
+
+    if (svStatus.numSvs > static_cast<uint32_t>(GnssMax::SVS_COUNT)) {
+        ALOGW("Too many satellites %zd. Clamps to %d.", svStatus.numSvs, GnssMax::SVS_COUNT);
+        svStatus.numSvs = static_cast<uint32_t>(GnssMax::SVS_COUNT);
+    }
+
+    for (size_t i = 0; i < svStatus.numSvs; i++) {
+        auto svInfo = status->gnss_sv_list[i];
+        IGnssCallback::GnssSvInfo gnssSvInfo = {
+            .svid = svInfo.svid,
+            .constellation = static_cast<android::hardware::gnss::V1_0::GnssConstellationType>(
+                    svInfo.constellation),
+            .cN0Dbhz = svInfo.c_n0_dbhz,
+            .elevationDegrees = svInfo.elevation,
+            .azimuthDegrees = svInfo.azimuth,
+            .svFlag = static_cast<IGnssCallback::GnssSvFlags>(svInfo.flags)
+        };
+        svStatus.gnssSvList[i] = gnssSvInfo;
+    }
+
+    sGnssCbIface->gnssSvStatusCb(svStatus);
+}
+
+/*
+ * This enum is used by gpsSvStatusCb() method below to convert GpsSvStatus
+ * to GnssSvStatus for backward compatibility. It is only used by the default
+ * implementation and is not part of the GNSS interface.
+ */
+enum SvidValues : uint16_t {
+    GLONASS_SVID_OFFSET = 64,
+    GLONASS_SVID_COUNT = 24,
+    BEIDOU_SVID_OFFSET = 200,
+    BEIDOU_SVID_COUNT = 35,
+    SBAS_SVID_MIN = 33,
+    SBAS_SVID_MAX = 64,
+    SBAS_SVID_ADD = 87,
+    QZSS_SVID_MIN = 193,
+    QZSS_SVID_MAX = 200
+};
+
+/*
+ * The following code that converts GpsSvStatus to GnssSvStatus is moved here from
+ * GnssLocationProvider. GnssLocationProvider does not require it anymore since GpsSvStatus is
+ * being deprecated and is no longer part of the GNSS interface.
+ */
+void Gnss::gpsSvStatusCb(GpsSvStatus* svInfo) {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    if (svInfo == nullptr) {
+        ALOGE("Invalid status from GNSS HAL %s", __func__);
+        return;
+    }
+
+    IGnssCallback::GnssSvStatus svStatus;
+    svStatus.numSvs = svInfo->num_svs;
+    /*
+     * Clamp the list size since GnssSvStatus can support a maximum of
+     * GnssMax::SVS_COUNT entries.
+     */
+    if (svStatus.numSvs > static_cast<uint32_t>(GnssMax::SVS_COUNT)) {
+        ALOGW("Too many satellites %zd. Clamps to %d.", svStatus.numSvs, GnssMax::SVS_COUNT);
+        svStatus.numSvs = static_cast<uint32_t>(GnssMax::SVS_COUNT);
+    }
+
+    uint32_t ephemerisMask = svInfo->ephemeris_mask;
+    uint32_t almanacMask = svInfo->almanac_mask;
+    uint32_t usedInFixMask = svInfo->used_in_fix_mask;
+    /*
+     * Conversion from GpsSvInfo to IGnssCallback::GnssSvInfo happens below.
+     */
+    for (size_t i = 0; i < svStatus.numSvs; i++) {
+        IGnssCallback::GnssSvInfo& info = svStatus.gnssSvList[i];
+        info.svid = svInfo->sv_list[i].prn;
+        if (info.svid >= 1 && info.svid <= 32) {
+            info.constellation = GnssConstellationType::GPS;
+        } else if (info.svid > GLONASS_SVID_OFFSET &&
+                   info.svid <= GLONASS_SVID_OFFSET + GLONASS_SVID_COUNT) {
+            info.constellation = GnssConstellationType::GLONASS;
+            info.svid -= GLONASS_SVID_OFFSET;
+        } else if (info.svid > BEIDOU_SVID_OFFSET &&
+                 info.svid <= BEIDOU_SVID_OFFSET + BEIDOU_SVID_COUNT) {
+            info.constellation = GnssConstellationType::BEIDOU;
+            info.svid -= BEIDOU_SVID_OFFSET;
+        } else if (info.svid >= SBAS_SVID_MIN && info.svid <= SBAS_SVID_MAX) {
+            info.constellation = GnssConstellationType::SBAS;
+            info.svid += SBAS_SVID_ADD;
+        } else if (info.svid >= QZSS_SVID_MIN && info.svid <= QZSS_SVID_MAX) {
+            info.constellation = GnssConstellationType::QZSS;
+        } else {
+            ALOGD("Unknown constellation type with Svid = %d.", info.svid);
+            info.constellation = GnssConstellationType::UNKNOWN;
+        }
+
+        info.cN0Dbhz = svInfo->sv_list[i].snr;
+        info.elevationDegrees = svInfo->sv_list[i].elevation;
+        info.azimuthDegrees = svInfo->sv_list[i].azimuth;
+        info.svFlag = IGnssCallback::GnssSvFlags::NONE;
+
+        /*
+         * Only GPS info is valid for these fields, as these masks are just 32
+         * bits, by GPS prn.
+         */
+        if (info.constellation == GnssConstellationType::GPS) {
+            int32_t svidMask = (1 << (info.svid - 1));
+            if ((ephemerisMask & svidMask) != 0) {
+                info.svFlag |= IGnssCallback::GnssSvFlags::HAS_EPHEMERIS_DATA;
+            }
+            if ((almanacMask & svidMask) != 0) {
+                info.svFlag |= IGnssCallback::GnssSvFlags::HAS_ALMANAC_DATA;
+            }
+            if ((usedInFixMask & svidMask) != 0) {
+                info.svFlag |= IGnssCallback::GnssSvFlags::USED_IN_FIX;
+            }
+        }
+    }
+
+    sGnssCbIface->gnssSvStatusCb(svStatus);
+}
+
+void Gnss::nmeaCb(GpsUtcTime timestamp, const char* nmea, int length) {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    android::hardware::hidl_string nmeaString;
+    nmeaString.setToExternal(nmea, length);
+    sGnssCbIface->gnssNmeaCb(timestamp, nmeaString);
+}
+
+void Gnss::setCapabilitiesCb(uint32_t capabilities) {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    sGnssCbIface->gnssSetCapabilitesCb(capabilities);
+}
+
+void Gnss::acquireWakelockCb() {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    sGnssCbIface->gnssAcquireWakelockCb();
+}
+
+void Gnss::releaseWakelockCb() {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    sGnssCbIface->gnssReleaseWakelockCb();
+}
+
+void Gnss::requestUtcTimeCb() {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    sGnssCbIface->gnssRequestTimeCb();
+}
+
+pthread_t Gnss::createThreadCb(const char* name, void (*start)(void*), void* arg) {
+    return createPthread(name, start, arg, &sThreadFuncArgsList);
+}
+
+void Gnss::setSystemInfoCb(const LegacyGnssSystemInfo* info) {
+    if (sGnssCbIface == nullptr) {
+        ALOGE("%s: GNSS Callback Interface configured incorrectly", __func__);
+        return;
+    }
+
+    if (info == nullptr) {
+        ALOGE("Invalid GnssSystemInfo from GNSS HAL %s", __func__);
+        return;
+    }
+
+    IGnssCallback::GnssSystemInfo gnssInfo = {
+        .yearOfHw = info->year_of_hw
+    };
+
+    sGnssCbIface->gnssSetSystemInfoCb(gnssInfo);
+}
+
+
+// Methods from ::android::hardware::gnss::V1_0::IGnss follow.
+Return<bool> Gnss::setCallback(const sp<IGnssCallback>& callback)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+        return false;
+    }
+
+    sGnssCbIface = callback;
+
+    return (mGnssIface->init(&sGnssCb) == 0);
+}
+
+Return<bool> Gnss::start()  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+        return false;
+    }
+
+    return (mGnssIface->start() == 0);
+}
+
+Return<bool> Gnss::stop()  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+        return false;
+    }
+
+    return (mGnssIface->stop() == 0);
+}
+
+Return<void> Gnss::cleanup()  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        mGnssIface->cleanup();
+    }
+    return Void();
+}
+
+Return<bool> Gnss::injectLocation(double latitudeDegrees,
+                                  double longitudeDegrees,
+                                  float accuracyMeters)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+        return false;
+    }
+
+    return (mGnssIface->inject_location(latitudeDegrees, longitudeDegrees, accuracyMeters) == 0);
+}
+
+Return<bool> Gnss::injectTime(int64_t timeMs, int64_t timeReferenceMs,
+                              int32_t uncertaintyMs) {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+        return false;
+    }
+
+    return (mGnssIface->inject_time(timeMs, timeReferenceMs, uncertaintyMs) == 0);
+}
+
+Return<void> Gnss::deleteAidingData(IGnss::GnssAidingData aidingDataFlags)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        mGnssIface->delete_aiding_data(static_cast<GpsAidingData>(aidingDataFlags));
+    }
+    return Void();
+}
+
+Return<bool> Gnss::setPositionMode(IGnss::GnssPositionMode mode,
+                                   IGnss::GnssPositionRecurrence recurrence,
+                                   uint32_t minIntervalMs,
+                                   uint32_t preferredAccuracyMeters,
+                                   uint32_t preferredTimeMs)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+        return false;
+    }
+
+    return (mGnssIface->set_position_mode(static_cast<GpsPositionMode>(mode),
+                                          static_cast<GpsPositionRecurrence>(recurrence),
+                                          minIntervalMs,
+                                          preferredAccuracyMeters,
+                                          preferredTimeMs) == 0);
+}
+
+Return<void> Gnss::getExtensionAGnssRil(getExtensionAGnssRil_cb _hidl_cb)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const AGpsRilInterface* agpsRilIface = static_cast<const AGpsRilInterface*>(
+                mGnssIface->get_extension(AGPS_RIL_INTERFACE));
+        if (agpsRilIface == nullptr) {
+            ALOGE("%s GnssRil interface not implemented by GNSS HAL", __func__);
+        } else {
+            mGnssRil = new AGnssRil(agpsRilIface);
+        }
+    }
+    _hidl_cb(mGnssRil);
+    return Void();
+}
+
+Return<void> Gnss::getExtensionGnssConfiguration(getExtensionGnssConfiguration_cb _hidl_cb)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const GnssConfigurationInterface* gnssConfigIface =
+                static_cast<const GnssConfigurationInterface*>(
+                        mGnssIface->get_extension(GNSS_CONFIGURATION_INTERFACE));
+
+        if (gnssConfigIface == nullptr) {
+            ALOGE("%s GnssConfiguration interface not implemented by GNSS HAL", __func__);
+        } else {
+            mGnssConfig = new GnssConfiguration(gnssConfigIface);
+        }
+    }
+    _hidl_cb(mGnssConfig);
+    return Void();
+}
+Return<void> Gnss::getExtensionGnssGeofencing(getExtensionGnssGeofencing_cb _hidl_cb)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const GpsGeofencingInterface* gpsGeofencingIface =
+                static_cast<const GpsGeofencingInterface*>(
+                        mGnssIface->get_extension(GPS_GEOFENCING_INTERFACE));
+
+        if (gpsGeofencingIface == nullptr) {
+            ALOGE("%s GnssGeofencing interface not implemented by GNSS HAL", __func__);
+        } else {
+            mGnssGeofencingIface = new GnssGeofencing(gpsGeofencingIface);
+        }
+    }
+
+    _hidl_cb(mGnssGeofencingIface);
+    return Void();
+}
+
+Return<void> Gnss::getExtensionAGnss(getExtensionAGnss_cb _hidl_cb)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const AGpsInterface* agpsIface = static_cast<const AGpsInterface*>(
+                mGnssIface->get_extension(AGPS_INTERFACE));
+        if (agpsIface == nullptr) {
+            ALOGE("%s AGnss interface not implemented by GNSS HAL", __func__);
+        } else {
+            mAGnssIface = new AGnss(agpsIface);
+        }
+    }
+    _hidl_cb(mAGnssIface);
+    return Void();
+}
+
+Return<void> Gnss::getExtensionGnssNi(getExtensionGnssNi_cb _hidl_cb)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const GpsNiInterface* gpsNiIface = static_cast<const GpsNiInterface*>(
+                mGnssIface->get_extension(GPS_NI_INTERFACE));
+        if (gpsNiIface == nullptr) {
+            ALOGE("%s GnssNi interface not implemented by GNSS HAL", __func__);
+        } else {
+            mGnssNi = new GnssNi(gpsNiIface);
+        }
+    }
+    _hidl_cb(mGnssNi);
+    return Void();
+}
+
+Return<void> Gnss::getExtensionGnssMeasurement(getExtensionGnssMeasurement_cb _hidl_cb) {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const GpsMeasurementInterface* gpsMeasurementIface =
+                static_cast<const GpsMeasurementInterface*>(
+                        mGnssIface->get_extension(GPS_MEASUREMENT_INTERFACE));
+
+        if (gpsMeasurementIface == nullptr) {
+            ALOGE("%s GnssMeasurement interface not implemented by GNSS HAL", __func__);
+        } else {
+            mGnssMeasurement = new GnssMeasurement(gpsMeasurementIface);
+        }
+    }
+    _hidl_cb(mGnssMeasurement);
+    return Void();
+}
+
+Return<void> Gnss::getExtensionGnssNavigationMessage(
+        getExtensionGnssNavigationMessage_cb _hidl_cb) {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const GpsNavigationMessageInterface* gpsNavigationMessageIface =
+                static_cast<const GpsNavigationMessageInterface*>(
+                        mGnssIface->get_extension(GPS_NAVIGATION_MESSAGE_INTERFACE));
+
+        if (gpsNavigationMessageIface == nullptr) {
+            ALOGE("%s GnssNavigationMessage interface not implemented by GNSS HAL",
+                  __func__);
+        } else {
+            mGnssNavigationMessage = new GnssNavigationMessage(gpsNavigationMessageIface);
+        }
+    }
+
+    _hidl_cb(mGnssNavigationMessage);
+    return Void();
+}
+
+Return<void> Gnss::getExtensionXtra(getExtensionXtra_cb _hidl_cb)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const GpsXtraInterface* gpsXtraIface = static_cast<const GpsXtraInterface*>(
+                mGnssIface->get_extension(GPS_XTRA_INTERFACE));
+
+        if (gpsXtraIface == nullptr) {
+            ALOGE("%s GnssXtra interface not implemented by HAL", __func__);
+        } else {
+            mGnssXtraIface = new GnssXtra(gpsXtraIface);
+        }
+    }
+
+    _hidl_cb(mGnssXtraIface);
+    return Void();
+}
+
+Return<void> Gnss::getExtensionGnssDebug(getExtensionGnssDebug_cb _hidl_cb)  {
+    if (mGnssIface == nullptr) {
+        ALOGE("%s: Gnss interface is unavailable", __func__);
+    } else {
+        const GpsDebugInterface* gpsDebugIface = static_cast<const GpsDebugInterface*>(
+                mGnssIface->get_extension(GPS_DEBUG_INTERFACE));
+
+        if (gpsDebugIface == nullptr) {
+            ALOGE("%s: GnssDebug interface is not implemented by HAL", __func__);
+        } else {
+            mGnssDebug = new GnssDebug(gpsDebugIface);
+        }
+    }
+
+    _hidl_cb(mGnssDebug);
+    return Void();
+}
+
+IGnss* HIDL_FETCH_IGnss(const char* hal) {
+    hw_module_t* module;
+    IGnss* iface = nullptr;
+    int err = hw_get_module(GPS_HARDWARE_MODULE_ID, (hw_module_t const**)&module);
+
+    if (err == 0) {
+        hw_device_t* device;
+        err = module->methods->open(module, GPS_HARDWARE_MODULE_ID, &device);
+        if (err == 0) {
+            iface = new Gnss(reinterpret_cast<gps_device_t*>(device));
+        } else {
+            ALOGE("gnssDevice open %s failed: %d", hal, err);
+        }
+    } else {
+      ALOGE("gnss hw_get_module %s failed: %d", hal, err);
+    }
+    return iface;
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android