diff --git a/soundtrigger/2.0/Android.bp b/soundtrigger/2.0/Android.bp
new file mode 100644
index 0000000..10a917b
--- /dev/null
+++ b/soundtrigger/2.0/Android.bp
@@ -0,0 +1,55 @@
+// This file is autogenerated by hidl-gen. Do not edit manually.
+
+genrule {
+    name: "android.hardware.soundtrigger@2.0_genc++",
+    tool: "hidl-gen",
+    cmd: "$tool -o $genDir -Lc++ -randroid.hardware:hardware/interfaces android.hardware.soundtrigger@2.0",
+    srcs: [
+        "types.hal",
+        "ISoundTriggerHw.hal",
+        "ISoundTriggerHwCallback.hal",
+    ],
+    out: [
+        "android/hardware/soundtrigger/2.0/types.cpp",
+        "android/hardware/soundtrigger/2.0/SoundTriggerHwAll.cpp",
+        "android/hardware/soundtrigger/2.0/SoundTriggerHwCallbackAll.cpp",
+    ],
+}
+
+genrule {
+    name: "android.hardware.soundtrigger@2.0_genc++_headers",
+    tool: "hidl-gen",
+    cmd: "$tool -o $genDir -Lc++ -randroid.hardware:hardware/interfaces android.hardware.soundtrigger@2.0",
+    srcs: [
+        "types.hal",
+        "ISoundTriggerHw.hal",
+        "ISoundTriggerHwCallback.hal",
+    ],
+    out: [
+        "android/hardware/soundtrigger/2.0/types.h",
+        "android/hardware/soundtrigger/2.0/ISoundTriggerHw.h",
+        "android/hardware/soundtrigger/2.0/IHwSoundTriggerHw.h",
+        "android/hardware/soundtrigger/2.0/BnSoundTriggerHw.h",
+        "android/hardware/soundtrigger/2.0/BpSoundTriggerHw.h",
+        "android/hardware/soundtrigger/2.0/BsSoundTriggerHw.h",
+        "android/hardware/soundtrigger/2.0/ISoundTriggerHwCallback.h",
+        "android/hardware/soundtrigger/2.0/IHwSoundTriggerHwCallback.h",
+        "android/hardware/soundtrigger/2.0/BnSoundTriggerHwCallback.h",
+        "android/hardware/soundtrigger/2.0/BpSoundTriggerHwCallback.h",
+        "android/hardware/soundtrigger/2.0/BsSoundTriggerHwCallback.h",
+    ],
+}
+
+cc_library_shared {
+    name: "android.hardware.soundtrigger@2.0",
+    generated_sources: ["android.hardware.soundtrigger@2.0_genc++"],
+    generated_headers: ["android.hardware.soundtrigger@2.0_genc++_headers"],
+    export_generated_headers: ["android.hardware.soundtrigger@2.0_genc++_headers"],
+    shared_libs: [
+        "libhidl",
+        "libhwbinder",
+        "libutils",
+        "libcutils",
+        "android.hardware.audio.common@2.0",
+    ],
+}
diff --git a/soundtrigger/2.0/Android.mk b/soundtrigger/2.0/Android.mk
new file mode 100644
index 0000000..1e3f036
--- /dev/null
+++ b/soundtrigger/2.0/Android.mk
@@ -0,0 +1,254 @@
+# This file is autogenerated by hidl-gen. Do not edit manually.
+
+LOCAL_PATH := $(call my-dir)
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.soundtrigger@2.0-java
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(local-generated-sources-dir)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+LOCAL_JAVA_LIBRARIES := \
+    android.hardware.audio.common@2.0-java \
+
+
+#
+# Build types.hal (ConfidenceLevel)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/ConfidenceLevel.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.ConfidenceLevel
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (PhraseRecognitionExtra)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/PhraseRecognitionExtra.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.PhraseRecognitionExtra
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (RecognitionMode)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/RecognitionMode.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.RecognitionMode
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (SoundModelType)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/SoundModelType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.SoundModelType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build ISoundTriggerHw.hal
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/ISoundTriggerHw.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/ISoundTriggerHw.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+$(GEN): $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::ISoundTriggerHw
+
+$(GEN): $(LOCAL_PATH)/ISoundTriggerHw.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build ISoundTriggerHwCallback.hal
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/ISoundTriggerHwCallback.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::ISoundTriggerHwCallback
+
+$(GEN): $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_JAVA_LIBRARY)
+
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.soundtrigger@2.0-java-static
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(local-generated-sources-dir)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+LOCAL_STATIC_JAVA_LIBRARIES := \
+    android.hardware.audio.common@2.0-java-static \
+
+
+#
+# Build types.hal (ConfidenceLevel)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/ConfidenceLevel.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.ConfidenceLevel
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (PhraseRecognitionExtra)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/PhraseRecognitionExtra.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.PhraseRecognitionExtra
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (RecognitionMode)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/RecognitionMode.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.RecognitionMode
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (SoundModelType)
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/SoundModelType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::types.SoundModelType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build ISoundTriggerHw.hal
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/ISoundTriggerHw.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/ISoundTriggerHw.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+$(GEN): $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::ISoundTriggerHw
+
+$(GEN): $(LOCAL_PATH)/ISoundTriggerHw.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build ISoundTriggerHwCallback.hal
+#
+GEN := $(intermediates)/android/hardware/soundtrigger/2.0/ISoundTriggerHwCallback.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.soundtrigger@2.0::ISoundTriggerHwCallback
+
+$(GEN): $(LOCAL_PATH)/ISoundTriggerHwCallback.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/soundtrigger/2.0/ISoundTriggerHw.hal b/soundtrigger/2.0/ISoundTriggerHw.hal
new file mode 100644
index 0000000..a1be85d
--- /dev/null
+++ b/soundtrigger/2.0/ISoundTriggerHw.hal
@@ -0,0 +1,215 @@
+/*
+ * Copyright 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.
+ */
+
+package android.hardware.soundtrigger@2.0;
+
+import android.hardware.audio.common@2.0;
+
+import ISoundTriggerHwCallback;
+
+interface ISoundTriggerHw {
+
+    /*
+     * Sound trigger implementation descriptor read by the framework via
+     * getProperties(). Used by SoundTrigger service to report to applications
+     * and manage concurrency and policy.
+     */
+    struct Properties {
+        /* Implementor name */
+        string   implementor;
+        /* Implementation description */
+        string   description;
+        /* Implementation version */
+        uint32_t version;
+        /* Unique implementation ID. The UUID must change with each version of
+           the engine implementation */
+        Uuid     uuid;
+        /* Maximum number of concurrent sound models loaded */
+        uint32_t maxSoundModels;
+        /* Maximum number of key phrases */
+        uint32_t maxKeyPhrases;
+        /* Maximum number of concurrent users detected */
+        uint32_t maxUsers;
+        /* All supported modes. e.g RecognitionMode.VOICE_TRIGGER */
+        uint32_t recognitionModes;
+        /* Supports seamless transition from detection to capture */
+        bool     captureTransition;
+        /* Maximum buffering capacity in ms if captureTransition is true */
+        uint32_t maxBufferMs;
+        /* Supports capture by other use cases while detection is active */
+        bool     concurrentCapture;
+        /* Returns the trigger capture in event */
+        bool     triggerInEvent;
+        /* Rated power consumption when detection is active with TDB
+         * silence/sound/speech ratio */
+        uint32_t powerConsumptionMw;
+    };
+
+
+    /*
+     * Base sound model descriptor. This struct is the header of a larger block
+     * passed to loadSoundModel() and contains the binary data of the
+     * sound model.
+     */
+    struct SoundModel {
+        /* Model type. e.g. SoundModelType.KEYPHRASE */
+        SoundModelType type;
+        /* Unique sound model ID. */
+        Uuid           uuid;
+        /* Unique vendor ID. Identifies the engine the sound model
+         * was build for */
+        Uuid           vendorUuid;
+        /* Opaque data transparent to Android framework */
+        vec<uint8_t>   data;
+    };
+
+    /* Key phrase descriptor */
+    struct Phrase {
+        /* Unique keyphrase ID assigned at enrollment time */
+        uint32_t      id;
+        /* Recognition modes supported by this key phrase */
+        uint32_t      recognitionModes;
+        /* List of users IDs associated with this key phrase */
+        vec<uint32_t> users;
+        /* Locale - Java Locale style (e.g. en_US) */
+        string        locale;
+        /* Phrase text in UTF-8 format. */
+        string        text;
+    };
+
+    /*
+     * Specialized sound model for key phrase detection.
+     * Proprietary representation of key phrases in binary data must match
+     * information indicated by phrases field
+     */
+    struct PhraseSoundModel {
+        /* Common part of sound model descriptor */
+        SoundModel  common;
+        /* List of descriptors for key phrases supported by this sound model */
+        vec<Phrase> phrases;
+    };
+
+    /*
+     * Configuration for sound trigger capture session passed to
+     * startRecognition() method
+     */
+    struct RecognitionConfig {
+        /* IO handle that will be used for capture. N/A if captureRequested
+         * is false */
+        AudioIoHandle   captureHandle;
+        /* Input device requested for detection capture */
+        AudioDevice     captureDevice;
+        /* Capture and buffer audio for this recognition instance */
+        bool            captureRequested;
+        /* Configuration for each key phrase */
+        vec<PhraseRecognitionExtra> phrases;
+        /* Opaque capture configuration data transparent to the framework */
+        vec<uint8_t>    data;
+    };
+
+
+    /*
+     * Retrieve implementation properties.
+     * @return retval Operation completion status: 0 in case of success,
+     *                -ENODEV in case of initialization error.
+     * @return properties A Properties structure containing implementation
+     *                    description and capabilities.
+     */
+    getProperties() generates (int32_t retval, Properties properties);
+
+    /*
+     * Load a sound model. Once loaded, recognition of this model can be
+     * started and stopped. Only one active recognition per model at a time.
+     * The SoundTrigger service must handle concurrent recognition requests by
+     * different users/applications on the same model.
+     * The implementation returns a unique handle used by other functions
+     * (unloadSoundModel(), startRecognition(), etc...
+     * @param soundModel A SoundModel structure describing the sound model to
+     *                   load.
+     * @param callback The callback interface on which the soundmodelCallback()
+     *                 method will be called upon completion.
+     * @param cookie The value of the cookie argument passed to the completion
+     *               callback. This unique context information is assigned and
+     *               used only by the framework.
+     * @return retval Operation completion status: 0 in case of success,
+     *                -EINVAL in case of invalid sound model (e.g 0 data size),
+     *                -ENOSYS in case of invalid operation (e.g max number of
+     *                models exceeded),
+     *                -ENOMEM in case of memory allocation failure,
+     *                -ENODEV in case of initialization error.
+     * @return modelHandle A unique handle assigned by the HAL for use by the
+     *                framework when controlling activity for this sound model.
+     */
+    loadSoundModel(SoundModel soundModel,
+                   ISoundTriggerHwCallback callback,
+                   CallbackCookie cookie)
+            generates (int32_t retval, SoundModelHandle modelHandle);
+
+    /*
+     * Unload a sound model. A sound model may be unloaded to make room for a
+     * new one to overcome implementation limitations.
+     * @param modelHandle the handle of the sound model to unload
+     * @return retval Operation completion status: 0 in case of success,
+     *                -ENOSYS if the model is not loaded,
+     *                -ENODEV in case of initialization error.
+     */
+    unloadSoundModel(SoundModelHandle modelHandle)
+            generates (int32_t retval);
+
+    /*
+     * Start recognition on a given model. Only one recognition active
+     * at a time per model. Once recognition succeeds of fails, the callback
+     * is called.
+     * @param modelHandle the handle of the sound model to use for recognition
+     * @param config A RecognitionConfig structure containing attributes of the
+     *               recognition to perform
+     * @param callback The callback interface on which the recognitionCallback()
+     *                 method must be called upon recognition.
+     * @param cookie The value of the cookie argument passed to the recognition
+     *               callback. This unique context information is assigned and
+     *               used only by the framework.
+     * @return retval Operation completion status: 0 in case of success,
+     *                -EINVAL in case of invalid recognition attributes,
+     *                -ENOSYS in case of invalid model handle,
+     *                -ENOMEM in case of memory allocation failure,
+     *                -ENODEV in case of initialization error.
+     */
+    startRecognition(SoundModelHandle modelHandle,
+                     RecognitionConfig config,
+                     ISoundTriggerHwCallback callback,
+                     CallbackCookie cookie)
+            generates (int32_t retval);
+
+    /*
+     * Stop recognition on a given model.
+     * The implementation must not call the recognition callback when stopped
+     * via this method.
+     * @param modelHandle The handle of the sound model to use for recognition
+     * @return retval Operation completion status: 0 in case of success,
+     *                -ENOSYS in case of invalid model handle,
+     *                -ENODEV in case of initialization error.
+     */
+    stopRecognition(SoundModelHandle modelHandle)
+            generates (int32_t retval);
+
+    /*
+     * Stop recognition on all models.
+     * @return retval Operation completion status: 0 in case of success,
+     *                -ENODEV in case of initialization error.
+     */
+    stopAllRecognitions()
+            generates (int32_t retval);
+};
diff --git a/soundtrigger/2.0/ISoundTriggerHwCallback.hal b/soundtrigger/2.0/ISoundTriggerHwCallback.hal
new file mode 100644
index 0000000..294d451
--- /dev/null
+++ b/soundtrigger/2.0/ISoundTriggerHwCallback.hal
@@ -0,0 +1,103 @@
+/*
+ * Copyright 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.
+ */
+
+package android.hardware.soundtrigger@2.0;
+
+import android.hardware.audio.common@2.0;
+
+interface ISoundTriggerHwCallback {
+    enum RecognitionStatus : uint32_t {
+        SUCCESS  = 0,
+        ABORT    = 1,
+        FAILURE  = 2,
+    };
+
+    enum SoundModelStatus : uint32_t {
+        UPDATED  = 0,
+    };
+
+    /*
+     * Generic recognition event sent via recognition callback
+     */
+    struct RecognitionEvent {
+        /* Recognition status e.g. SUCCESS */
+        RecognitionStatus status;
+        /* Sound model type for this event. e.g SoundModelType.TYPE_KEYPHRASE */
+        SoundModelType    type;
+        /* Handle of loaded sound model which triggered the event */
+        SoundModelHandle  model;
+        /* It is possible to capture audio from this */
+        /* utterance buffered by the implementation */
+        bool              captureAvailable;
+        /* Audio session ID. framework use */
+        int32_t           captureSession;
+        /* Delay in ms between end of model detection and start of audio
+        /* available for capture. A negative value is possible
+         * (e.g. if key phrase is also available for capture */
+        int32_t           captureDelayMs;
+        /* Duration in ms of audio captured before the start of the trigger.
+         * 0 if none. */
+        int32_t           capturePreambleMs;
+        /* The opaque data is the capture of the trigger sound */
+        bool              triggerInData;
+        /* Audio format of either the trigger in event data or to use for
+         * capture of the rest of the utterance */
+        AudioConfig       audioConfig;
+        /* Opaque event data */
+        vec<uint8_t>      data;
+    };
+
+    /*
+     * Specialized recognition event for key phrase recognitions
+     */
+    struct PhraseRecognitionEvent {
+        /* Common part of the recognition event */
+        RecognitionEvent common;
+        /* List of descriptors for each recognized key phrase */
+        vec<PhraseRecognitionExtra> phraseExtras;
+    };
+
+    /*
+     * Event sent via load sound model callback
+     */
+    struct ModelEvent {
+         /* Sound model status e.g. SoundModelStatus.UPDATED */
+        SoundModelStatus status;
+        /* Loaded sound model that triggered the event */
+        SoundModelHandle model;
+        /* Opaque event data, passed transparently by the framework */
+        vec<uint8_t>     data;
+    };
+
+    typedef int32_t CallbackCookie;
+
+    /*
+     * Callback method called by the HAL when the sound recognition triggers
+     * @param event A RecognitionEvent structure containing detailed results
+     *              of the recognition triggered
+     * @param cookie The cookie passed by the framework when recognition was
+     *               started (see ISoundtriggerHw.startRecognition()
+     */
+    recognitionCallback(RecognitionEvent event, CallbackCookie cookie);
+    /*
+     * Callback method called by the HAL when the sound model loading completes
+     * @param event A ModelEvent structure containing detailed results of the
+     *              model loading operation
+     * @param cookie The cookie passed by the framework when loading was
+     *               initiated (see ISoundtriggerHw.loadSoundModel()
+     */
+    soundModelCallback(ModelEvent event, CallbackCookie cookie);
+};
diff --git a/soundtrigger/2.0/types.hal b/soundtrigger/2.0/types.hal
new file mode 100644
index 0000000..059ab32
--- /dev/null
+++ b/soundtrigger/2.0/types.hal
@@ -0,0 +1,75 @@
+/*
+ * Copyright 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.
+ */
+
+package android.hardware.soundtrigger@2.0;
+
+/*
+ * Sound model types modes used in ISoundTriggerHw.SoundModel
+ */
+enum SoundModelType : int32_t {
+    /* use for unspecified sound model type */
+    UNKNOWN   = -1,
+    /* use for key phrase sound models */
+    KEYPHRASE = 0,
+    /* use for all models other than keyphrase */
+    GENERIC   = 1,
+};
+
+typedef int32_t SoundModelHandle;
+
+
+/*
+ * Recognition modes used in ISoundTriggerHw.RecognitionConfig,
+ * ISoundTriggerHw.Properties or PhraseRecognitionExtra
+ */
+enum RecognitionMode : uint32_t {
+    /* simple voice trigger */
+    VOICE_TRIGGER       = (1 << 0),
+    /* trigger only if one user in model identified */
+    USER_IDENTIFICATION = (1 << 1),
+    /* trigger only if one user in mode authenticated */
+    USER_AUTHENTICATION = (1 << 2),
+    /* generic sound trigger */
+    GENERIC_TRIGGER     = (1 << 3),
+};
+
+/*
+ * Confidence level for each user in structure PhraseRecognitionExtra
+ */
+struct ConfidenceLevel {
+    /* user ID */
+    uint32_t userId;
+    /* confidence level in percent (0 - 100): */
+    /* - min level for recognition configuration */
+    /* - detected level for recognition event */
+    uint32_t levelPercent;
+};
+
+/*
+ * Specialized recognition event for key phrase detection
+ */
+struct PhraseRecognitionExtra {
+    /* keyphrase ID */
+    uint32_t id;
+    /* recognition modes used for this keyphrase */
+    uint32_t recognitionModes;
+    /* confidence level for mode RecognitionMode.VOICE_TRIGGER */
+    uint32_t confidenceLevel;
+    /* list of confidence levels per user for
+     * RecognitionMode.USER_IDENTIFICATION and
+     * RecognitionMode.USER_AUTHENTICATION */
+    vec<ConfidenceLevel> levels;
+};