diff --git a/usb/aidl/Android.bp b/usb/aidl/Android.bp
new file mode 100644
index 0000000..d1e9e68
--- /dev/null
+++ b/usb/aidl/Android.bp
@@ -0,0 +1,33 @@
+// Copyright (C) 2021 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.
+
+aidl_interface {
+    name: "android.hardware.usb",
+    vendor_available: true,
+    srcs: ["android/hardware/usb/*.aidl"],
+    stability: "vintf",
+    backend: {
+        cpp: {
+            enabled: false,
+        },
+        java: {
+            sdk_version: "module_current",
+        },
+        ndk: {
+            vndk: {
+                enabled: true,
+            },
+        },
+    },
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantDetectionStatus.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantDetectionStatus.aidl
new file mode 100644
index 0000000..24c6966
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantDetectionStatus.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+enum ContaminantDetectionStatus {
+  NOT_SUPPORTED = 0,
+  DISABLED = 1,
+  NOT_DETECTED = 2,
+  DETECTED = 3,
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantProtectionMode.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantProtectionMode.aidl
new file mode 100644
index 0000000..9979869
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantProtectionMode.aidl
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+enum ContaminantProtectionMode {
+  NONE = 0,
+  FORCE_SINK = 1,
+  FORCE_SOURCE = 2,
+  FORCE_DISABLE = 3,
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantProtectionStatus.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantProtectionStatus.aidl
new file mode 100644
index 0000000..9642261
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/ContaminantProtectionStatus.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+enum ContaminantProtectionStatus {
+  NONE = 0,
+  FORCE_SINK = 1,
+  FORCE_SOURCE = 2,
+  FORCE_DISABLE = 3,
+  DISABLED = 4,
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/IUsb.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/IUsb.aidl
new file mode 100644
index 0000000..7513461
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/IUsb.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+interface IUsb {
+  oneway void enableContaminantPresenceDetection(in String portName, in boolean enable, long transactionId);
+  oneway void enableUsbData(in String portName, boolean enable, long transactionId);
+  oneway void queryPortStatus(long transactionId);
+  oneway void setCallback(in android.hardware.usb.IUsbCallback callback);
+  oneway void switchRole(in String portName, in android.hardware.usb.PortRole role, long transactionId);
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/IUsbCallback.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/IUsbCallback.aidl
new file mode 100644
index 0000000..57be590
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/IUsbCallback.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+interface IUsbCallback {
+  oneway void notifyPortStatusChange(in android.hardware.usb.PortStatus[] currentPortStatus, in android.hardware.usb.Status retval);
+  oneway void notifyRoleSwitchStatus(in String portName, in android.hardware.usb.PortRole newRole, in android.hardware.usb.Status retval, long transactionId);
+  oneway void notifyEnableUsbDataStatus(in String portName, boolean enable, in android.hardware.usb.Status retval, long transactionId);
+  oneway void notifyContaminantEnabledStatus(in String portName, boolean enable, in android.hardware.usb.Status retval, long transactionId);
+  oneway void notifyQueryPortStatus(in String portName, in android.hardware.usb.Status retval, long transactionId);
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortDataRole.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortDataRole.aidl
new file mode 100644
index 0000000..105b316
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortDataRole.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+enum PortDataRole {
+  NONE = 0,
+  HOST = 1,
+  DEVICE = 2,
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortMode.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortMode.aidl
new file mode 100644
index 0000000..34e4334
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortMode.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+enum PortMode {
+  NONE = 0,
+  UFP = 1,
+  DFP = 2,
+  DRP = 3,
+  AUDIO_ACCESSORY = 4,
+  DEBUG_ACCESSORY = 5,
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortPowerRole.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortPowerRole.aidl
new file mode 100644
index 0000000..0e6f3fb
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortPowerRole.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+enum PortPowerRole {
+  NONE = 0,
+  SOURCE = 1,
+  SINK = 2,
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortRole.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortRole.aidl
new file mode 100644
index 0000000..c66aecc
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortRole.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+union PortRole {
+  android.hardware.usb.PortPowerRole powerRole = android.hardware.usb.PortPowerRole.NONE;
+  android.hardware.usb.PortDataRole dataRole;
+  android.hardware.usb.PortMode mode;
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortStatus.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortStatus.aidl
new file mode 100644
index 0000000..78dcfac
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/PortStatus.aidl
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@VintfStability
+parcelable PortStatus {
+  String portName;
+  android.hardware.usb.PortDataRole currentDataRole = android.hardware.usb.PortDataRole.NONE;
+  android.hardware.usb.PortPowerRole currentPowerRole = android.hardware.usb.PortPowerRole.NONE;
+  android.hardware.usb.PortMode currentMode = android.hardware.usb.PortMode.NONE;
+  boolean canChangeMode;
+  boolean canChangeDataRole;
+  boolean canChangePowerRole;
+  android.hardware.usb.PortMode[] supportedModes;
+  android.hardware.usb.ContaminantProtectionMode[] supportedContaminantProtectionModes;
+  boolean supportsEnableContaminantPresenceProtection;
+  android.hardware.usb.ContaminantProtectionStatus contaminantProtectionStatus = android.hardware.usb.ContaminantProtectionStatus.NONE;
+  boolean supportsEnableContaminantPresenceDetection;
+  android.hardware.usb.ContaminantDetectionStatus contaminantDetectionStatus = android.hardware.usb.ContaminantDetectionStatus.NOT_SUPPORTED;
+  boolean usbDataEnabled;
+}
diff --git a/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/Status.aidl b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/Status.aidl
new file mode 100644
index 0000000..f28fc2a
--- /dev/null
+++ b/usb/aidl/aidl_api/android.hardware.usb/current/android/hardware/usb/Status.aidl
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.usb;
+@Backing(type="int") @VintfStability
+enum Status {
+  SUCCESS = 0,
+  ERROR = 1,
+  INVALID_ARGUMENT = 2,
+  UNRECOGNIZED_ROLE = 3,
+  NOT_SUPPORTED = 4,
+}
diff --git a/usb/aidl/android/hardware/usb/ContaminantDetectionStatus.aidl b/usb/aidl/android/hardware/usb/ContaminantDetectionStatus.aidl
new file mode 100644
index 0000000..d9bc576
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/ContaminantDetectionStatus.aidl
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+@VintfStability
+enum ContaminantDetectionStatus {
+    /**
+     * Contaminant presence detection is not supported.
+     */
+    NOT_SUPPORTED = 0,
+    /**
+     * Contaminant presence detection is supported but disabled.
+     */
+    DISABLED = 1,
+    /**
+     * Contaminant presence detection is enabled and contaminant not detected.
+     */
+    NOT_DETECTED = 2,
+    /**
+     * Contaminant presence detection is enabled and contaminant detected.
+     */
+    DETECTED = 3,
+}
diff --git a/usb/aidl/android/hardware/usb/ContaminantProtectionMode.aidl b/usb/aidl/android/hardware/usb/ContaminantProtectionMode.aidl
new file mode 100644
index 0000000..47c073d
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/ContaminantProtectionMode.aidl
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+@VintfStability
+enum ContaminantProtectionMode {
+    /**
+     * No action performed upon detection of contaminant presence.
+     */
+    NONE = 0,
+    /**
+     * Upon detection of contaminant presence, Port is forced to sink only
+     * mode where a port shall only detect chargers until contaminant presence
+     * is no longer detected.
+     */
+    FORCE_SINK = 1,
+    /**
+     * Upon detection of contaminant presence, Port is forced to source only
+     * mode where a port shall only detect usb accessories such as headsets
+     * until contaminant presence is no longer detected.
+     */
+    FORCE_SOURCE = 2,
+    /**
+     * Upon detection of contaminant presence, port is disabled until contaminant
+     * presence is no longer detected. In the disabled state port will
+     * not respond to connection of chargers or usb accessories.
+     */
+    FORCE_DISABLE = 3,
+}
diff --git a/usb/aidl/android/hardware/usb/ContaminantProtectionStatus.aidl b/usb/aidl/android/hardware/usb/ContaminantProtectionStatus.aidl
new file mode 100644
index 0000000..c4fa979
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/ContaminantProtectionStatus.aidl
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+import android.hardware.usb.ContaminantProtectionMode;
+
+@VintfStability
+enum ContaminantProtectionStatus {
+    /**
+     * No action performed upon detection of contaminant presence.
+     */
+    NONE = 0,
+    /**
+     * Upon detection of contaminant presence, Port is forced to sink only
+     * mode where a port shall only detect chargers until contaminant presence
+     * is no longer detected.
+     */
+    FORCE_SINK = 1,
+    /**
+     * Upon detection of contaminant presence, Port is forced to source only
+     * mode where a port shall only detect usb accessories such as headsets
+     * until contaminant presence is no longer detected.
+     */
+    FORCE_SOURCE = 2,
+    /**
+     * Upon detection of contaminant presence, port is disabled until contaminant
+     * presence is no longer detected. In the disabled state port will
+     * not respond to connection of chargers or usb accessories.
+     */
+    FORCE_DISABLE = 3,
+    /**
+     * Client disabled cotaminant protection by calling
+     * enableContaminantPresencePortProtection set to false. Low level drivers should
+     * not autmomously take any corrective action when contaminant presence is detected.
+     */
+    DISABLED = 4,
+}
diff --git a/usb/aidl/android/hardware/usb/IUsb.aidl b/usb/aidl/android/hardware/usb/IUsb.aidl
new file mode 100644
index 0000000..9a8f000
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/IUsb.aidl
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+import android.hardware.usb.IUsbCallback;
+import android.hardware.usb.PortRole;
+
+@VintfStability
+oneway interface IUsb {
+    /**
+     * When supportsEnableContaminantPresenceDetection is true,
+     * enableContaminantPresenceDetection enables/disables contaminant
+     * presence detection algorithm. Calling enableContaminantPresenceDetection
+     * when supportsEnableContaminantPresenceDetection is false does
+     * not have any effect.
+     * Change in contantaminant presence status should be notified to the
+     * client via notifyPortStatusChange through PortStatus.
+     *
+     * @param portName name of the port.
+     * @param enable true Enable contaminant presence detection algorithm.
+     *               false Disable contaminant presence detection algorithm.
+     * @param transactionId ID to be used when invoking the callback.
+     */
+    void enableContaminantPresenceDetection(in String portName, in boolean enable, long transactionId);
+
+    /**
+     * This function is used to enable/disable USB data controller.
+     *
+     * @param portName Name of the port.
+     * @param enable   true Enable USB data signaling.
+     *                 false Disable USB data signaling.
+     * @param transactionId ID to be used when invoking the callback.
+     *
+     */
+    void enableUsbData(in String portName, boolean enable, long transactionId);
+
+    /**
+     * This functions is used to request the hal for the current status
+     * status of the Type-C ports. The result of the query would be sent
+     * through the IUsbCallback object's notifyRoleSwitchStatus
+     * to the caller. This api would would let the caller know of the number
+     * of type-c ports that are present and their connection status through the
+     * PortStatus type.
+     * @param transactionId ID to be used when invoking the callback.
+     */
+    void queryPortStatus(long transactionId);
+
+    /**
+     * This function is used to register a callback function which is
+     * called by the HAL to inform the client of port status updates and
+     * result of the requested operation. Please refer IUsbCallback for
+     * complete description of when each of the IUsbCallback's interface
+     * methods is expected to be called.
+     *
+     * @param callback IUsbCallback object used to convey status to the
+     * userspace.
+     */
+    void setCallback(in IUsbCallback callback);
+
+    /**
+     * This function is used to change the port role of a specific port.
+     * For example, when DR_SWAP or PR_SWAP is supported.
+     * The status of the role switch will be informed through IUsbCallback
+     * object's notifyPortStatusChange method.
+     *
+     * @param portName name of the port for which the role has to be changed
+     * @param role the new port role.
+     * @param transactionId ID to be used when invoking the callback.
+     */
+    void switchRole(in String portName, in PortRole role, long transactionId);
+}
diff --git a/usb/aidl/android/hardware/usb/IUsbCallback.aidl b/usb/aidl/android/hardware/usb/IUsbCallback.aidl
new file mode 100644
index 0000000..232a15b
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/IUsbCallback.aidl
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+import android.hardware.usb.PortRole;
+import android.hardware.usb.PortStatus;
+import android.hardware.usb.Status;
+
+/**
+ * Callback object used for all the IUsb async methods which expects a result.
+ * Caller is expected to register the callback object using setCallback method
+ * to receive updates on the PortStatus.
+ */
+@VintfStability
+oneway interface IUsbCallback {
+    /**
+     * Used to convey the current port status to the caller.
+     * Must be called either when PortState changes due to the port partner or
+     * when caller requested for the PortStatus update through queryPortStatus.
+     *
+     * @param currentPortStatus describes the status of all the USB ports in the
+     *                          device.
+     * @param retval SUCCESS when the required information was enquired form
+     *               kernel and the PortStatus object was built.
+     *               ERROR otherwise.
+     */
+    void notifyPortStatusChange(in PortStatus[] currentPortStatus, in Status retval);
+
+    /**
+     * Used to notify the result of the switchRole call to the caller.
+     *
+     * @param portName name of the port for which the roleswap is requested.
+     * @param newRole the new role requested by the caller.
+     * @param retval SUCCESS if the role switch succeeded. FAILURE otherwise.
+     * @param transactionId  transactionId sent during switchRole request.
+     */
+    void notifyRoleSwitchStatus(in String portName, in PortRole newRole, in Status retval,
+            long transactionId);
+
+    /**
+     * Used to notify the result of notifyEnableUsbDataStatus call to the caller.
+     *
+     * @param portName name of the port for which the enableUsbData is requested.
+     * @param enable true when usb data is enabled.
+     *               false when usb data is disabled.
+     * @param retval SUCCESS if current request succeeded. FAILURE otherwise.
+     * @param transactionId transactionId sent during enableUsbData request.
+     */
+    void notifyEnableUsbDataStatus(in String portName, boolean enable, in Status retval,
+            long transactionId);
+
+    /**
+     * Used to notify the result of enableContaminantPresenceDetection.
+     *
+     * @param portName name of the port for which contaminant detection is enabled/disabled.
+     * @param enable true when contaminant detection is enabled.
+     *               false when disabled.
+     * @param retval SUCCESS if the request for enabling/disabling contamiant detection succeeds.
+     *               FAILURE otherwise.
+     * @param transactionId transactionId sent during queryPortStatus request
+     */
+    void notifyContaminantEnabledStatus(in String portName, boolean enable, in Status retval,
+            long transactionId);
+
+    /**
+     * Used to notify the request to query port status.
+     *
+     * @param portName name of the port for which port status is queried.
+     * @param retval SUCCESS if the port query succeeded. FAILURE otherwise.
+     * @param transactionId transactionId sent during queryPortStatus request
+     */
+    void notifyQueryPortStatus(in String portName, in Status retval, long transactionId);
+}
diff --git a/usb/aidl/android/hardware/usb/PortDataRole.aidl b/usb/aidl/android/hardware/usb/PortDataRole.aidl
new file mode 100644
index 0000000..a69f977
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/PortDataRole.aidl
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+@VintfStability
+enum PortDataRole {
+    /**
+     * Indicates that the port does not have a data role.
+     * In case of DRP, the current data role of the port is only resolved
+     * when the type-c handshake happens.
+     */
+    NONE = 0,
+    /**
+     * Indicates that the port is acting as a host for data.
+     */
+    HOST = 1,
+    /**
+     * Indicated that the port is acting as a device for data.
+     */
+    DEVICE = 2,
+}
diff --git a/usb/aidl/android/hardware/usb/PortMode.aidl b/usb/aidl/android/hardware/usb/PortMode.aidl
new file mode 100644
index 0000000..399f0eb
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/PortMode.aidl
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+import android.hardware.usb.PortMode;
+
+@VintfStability
+enum PortMode {
+    /**
+     * Indicates that the port does not have a mode.
+     * In case of DRP, the current mode of the port is only resolved
+     * when the type-c handshake happens.
+     */
+    NONE = 0,
+    /**
+     * Indicates that port can only act as device for data and sink for power.
+     */
+    UFP = 1,
+    /**
+     * Indicates the port can only act as host for data and source for power.
+     */
+    DFP = 2,
+    /**
+     * Indicates can either act as UFP or DFP at a given point of time.
+     */
+    DRP = 3,
+    /*
+     * Indicates that the port supports Audio Accessory mode.
+     */
+    AUDIO_ACCESSORY = 4,
+    /*
+     * Indicates that the port supports Debug Accessory mode.
+     */
+    DEBUG_ACCESSORY = 5,
+}
diff --git a/usb/aidl/android/hardware/usb/PortPowerRole.aidl b/usb/aidl/android/hardware/usb/PortPowerRole.aidl
new file mode 100644
index 0000000..ae3dc47
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/PortPowerRole.aidl
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+@VintfStability
+enum PortPowerRole {
+    /**
+     * Indicates that the port does not have a power role.
+     * In case of DRP, the current power role of the port is only resolved
+     * when the type-c handshake happens.
+     */
+    NONE = 0,
+    /**
+     * Indicates that the port is supplying power to the other port.
+     */
+    SOURCE = 1,
+    /**
+     * Indicates that the port is sinking power from the other port.
+     */
+    SINK = 2,
+}
diff --git a/usb/aidl/android/hardware/usb/PortRole.aidl b/usb/aidl/android/hardware/usb/PortRole.aidl
new file mode 100644
index 0000000..e0429c8
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/PortRole.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+import android.hardware.usb.PortDataRole;
+import android.hardware.usb.PortMode;
+import android.hardware.usb.PortPowerRole;
+
+/**
+ * Used as a container to send port role information.
+ */
+@VintfStability
+union PortRole {
+    PortPowerRole powerRole = PortPowerRole.NONE;
+    PortDataRole dataRole;
+    PortMode mode;
+}
diff --git a/usb/aidl/android/hardware/usb/PortStatus.aidl b/usb/aidl/android/hardware/usb/PortStatus.aidl
new file mode 100644
index 0000000..8afe009
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/PortStatus.aidl
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+import android.hardware.usb.ContaminantDetectionStatus;
+import android.hardware.usb.ContaminantProtectionMode;
+import android.hardware.usb.ContaminantProtectionStatus;
+import android.hardware.usb.PortDataRole;
+import android.hardware.usb.PortMode;
+import android.hardware.usb.PortPowerRole;
+
+@VintfStability
+parcelable PortStatus {
+    /**
+     * Name of the port.
+     * Used as the port's id by the caller.
+     */
+    String portName;
+    /**
+     * Data role of the port.
+     */
+    PortDataRole currentDataRole = PortDataRole.NONE;
+    /**
+     * Power Role of thte port.
+     */
+    PortPowerRole currentPowerRole = PortPowerRole.NONE;
+    /**
+     * Mode in which the port is connected.
+     * Can be UFP or DFP or AUDIO_ACCESSORY or
+     * DEBUG_ACCESSORY.
+     */
+    PortMode currentMode = PortMode.NONE;
+    /**
+     * True indicates that the port's mode can
+     * be changed. False otherwise.
+     */
+    boolean canChangeMode;
+    /**
+     * True indicates that the port's data role
+     * can be changed. False otherwise.
+     * For example, true if Type-C PD PD_SWAP
+     * is supported.
+     */
+    boolean canChangeDataRole;
+    /**
+     * True indicates that the port's power role
+     * can be changed. False otherwise.
+     * For example, true if Type-C PD PR_SWAP
+     * is supported.
+     */
+    boolean canChangePowerRole;
+    /**
+     * Identifies the type of the local port.
+     *
+     * UFP - Indicates that port can only act as device for
+     *       data and sink for power.
+     * DFP - Indicates the port can only act as host for data
+     *       and source for power.
+     * DRP - Indicates can either act as UFP or DFP at a
+     *       given point of time.
+     * AUDIO_ACCESSORY -  Indicates that the port supports
+     *                    Audio Accessory mode.
+     * DEBUG_ACCESSORY - Indicates that the port supports
+     *                   Debug Accessory mode.
+     */
+    PortMode[] supportedModes;
+    /**
+     * Contaminant presence protection modes supported by the port.
+     */
+    ContaminantProtectionMode[] supportedContaminantProtectionModes;
+    /**
+     * Client can enable/disable contaminant presence protection through
+     * enableContaminantPresenceProtection when true.
+     */
+    boolean supportsEnableContaminantPresenceProtection;
+    /**
+     * Contaminant presence protection modes currently active for the port.
+     */
+    ContaminantProtectionStatus contaminantProtectionStatus = ContaminantProtectionStatus.NONE;
+    /**
+     * Client can enable/disable contaminant presence detection through
+     * enableContaminantPresenceDetection when true.
+     */
+    boolean supportsEnableContaminantPresenceDetection;
+    /**
+     * Current status of contaminant detection algorithm.
+     */
+    ContaminantDetectionStatus contaminantDetectionStatus = ContaminantDetectionStatus.NOT_SUPPORTED;
+    /**
+     * UsbData status of the port.
+     */
+    boolean usbDataEnabled;
+}
diff --git a/usb/aidl/android/hardware/usb/Status.aidl b/usb/aidl/android/hardware/usb/Status.aidl
new file mode 100644
index 0000000..468ba4a
--- /dev/null
+++ b/usb/aidl/android/hardware/usb/Status.aidl
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2021 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.usb;
+
+@VintfStability
+@Backing(type="int")
+enum Status {
+    SUCCESS = 0,
+    /**
+     * error value when the HAL operation fails for reasons not listed here.
+     */
+    ERROR = 1,
+    /**
+     * error value returned when input argument is invalid.
+     */
+    INVALID_ARGUMENT = 2,
+    /**
+     * error value returned when role string is unrecognized.
+     */
+    UNRECOGNIZED_ROLE = 3,
+    /**
+     * Error value returned when the operation is not supported.
+     */
+    NOT_SUPPORTED = 4,
+}
diff --git a/usb/aidl/conversion.log b/usb/aidl/conversion.log
new file mode 100644
index 0000000..c090446
--- /dev/null
+++ b/usb/aidl/conversion.log
@@ -0,0 +1,11 @@
+Notes relating to hidl2aidl conversion of android.hardware.usb@1.3 to android.hardware.usb (if any) follow:
+Unhandled comments from android.hardware.usb@1.1::types follow. Consider using hidl-lint to locate these and fixup as many as possible.
+ // NOTE: suffix '_1_1' is for legacy ABI compatibility. It cannot be
+ // changed to 'PortMode' which the convention dictates.
+ // NOTE: suffix '_1_1' is for legacy ABI compatibility. It cannot be
+ // changed to 'PortStatus' which the convention dictates.
+
+An unknown named type was found in translation: android.hardware.usb@1.0::PortStatus
+An unknown named type was found in translation: android.hardware.usb@1.0::PortStatus
+An unknown named type was found in translation: android.hardware.usb@1.0::PortStatus
+END OF LOG
diff --git a/usb/aidl/default/Android.bp b/usb/aidl/default/Android.bp
new file mode 100644
index 0000000..da0cff2
--- /dev/null
+++ b/usb/aidl/default/Android.bp
@@ -0,0 +1,35 @@
+//
+// Copyright (C) 2021 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.
+//
+
+cc_binary {
+    name: "android.hardware.usb-service.example",
+    relative_install_path: "hw",
+    init_rc: ["android.hardware.usb-service.example.rc"],
+    vintf_fragments: ["android.hardware.usb-service.example.xml"],
+    vendor: true,
+    srcs: [
+        "service.cpp",
+        "Usb.cpp",
+    ],
+    shared_libs: [
+        "android.hardware.usb-V1-ndk",
+        "libbase",
+        "libbinder_ndk",
+	"libcutils",
+        "liblog",
+        "libutils",
+    ],
+}
diff --git a/usb/aidl/default/Usb.cpp b/usb/aidl/default/Usb.cpp
new file mode 100644
index 0000000..1105376
--- /dev/null
+++ b/usb/aidl/default/Usb.cpp
@@ -0,0 +1,693 @@
+/*
+ * Copyright (C) 2021 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 "android.hardware.usb.aidl-service"
+
+#include <aidl/android/hardware/usb/PortRole.h>
+#include <android-base/logging.h>
+#include <android-base/properties.h>
+#include <android-base/strings.h>
+#include <assert.h>
+#include <dirent.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <chrono>
+#include <regex>
+#include <thread>
+#include <unordered_map>
+
+#include <cutils/uevent.h>
+#include <sys/epoll.h>
+#include <utils/Errors.h>
+#include <utils/StrongPointer.h>
+
+#include "Usb.h"
+
+using android::base::GetProperty;
+using android::base::Trim;
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace usb {
+
+constexpr char kTypecPath[] = "/sys/class/typec/";
+constexpr char kDataRoleNode[] = "/data_role";
+constexpr char kPowerRoleNode[] = "/power_role";
+
+// Set by the signal handler to destroy the thread
+volatile bool destroyThread;
+
+void queryVersionHelper(android::hardware::usb::Usb *usb,
+                        std::vector<PortStatus> *currentPortStatus);
+
+ScopedAStatus Usb::enableUsbData(const string& in_portName, bool in_enable, int64_t in_transactionId) {
+    std::vector<PortStatus> currentPortStatus;
+
+    pthread_mutex_lock(&mLock);
+    if (mCallback != NULL) {
+        ScopedAStatus ret = mCallback->notifyEnableUsbDataStatus(
+            in_portName, true, in_enable ? Status::SUCCESS : Status::ERROR, in_transactionId);
+        if (!ret.isOk())
+            ALOGE("notifyEnableUsbDataStatus error %s", ret.getDescription().c_str());
+    } else {
+        ALOGE("Not notifying the userspace. Callback is not set");
+    }
+    pthread_mutex_unlock(&mLock);
+    queryVersionHelper(this, &currentPortStatus);
+
+    return ScopedAStatus::ok();
+}
+
+Status queryMoistureDetectionStatus(std::vector<PortStatus> *currentPortStatus) {
+    string enabled, status, path, DetectedPath;
+
+    for (int i = 0; i < currentPortStatus->size(); i++) {
+        (*currentPortStatus)[i].supportedContaminantProtectionModes
+                .push_back(ContaminantProtectionMode::NONE);
+        (*currentPortStatus)[i].contaminantProtectionStatus
+                = ContaminantProtectionStatus::NONE;
+        (*currentPortStatus)[i].contaminantDetectionStatus
+                = ContaminantDetectionStatus::NOT_SUPPORTED;
+        (*currentPortStatus)[i].supportsEnableContaminantPresenceDetection = false;
+        (*currentPortStatus)[i].supportsEnableContaminantPresenceProtection = false;
+    }
+
+    return Status::SUCCESS;
+}
+
+string appendRoleNodeHelper(const string &portName, PortRole::Tag tag) {
+    string node(kTypecPath + portName);
+
+    switch (tag) {
+        case PortRole::dataRole:
+            return node + kDataRoleNode;
+        case PortRole::powerRole:
+            return node + kPowerRoleNode;
+        case PortRole::mode:
+            return node + "/port_type";
+        default:
+            return "";
+    }
+}
+
+string convertRoletoString(PortRole role) {
+    if (role.getTag() == PortRole::powerRole) {
+        if (role.get<PortRole::powerRole>() == PortPowerRole::SOURCE)
+            return "source";
+        else if (role.get<PortRole::powerRole>() == PortPowerRole::SINK)
+            return "sink";
+    } else if (role.getTag() == PortRole::dataRole) {
+        if (role.get<PortRole::dataRole>() == PortDataRole::HOST)
+            return "host";
+        if (role.get<PortRole::dataRole>() == PortDataRole::DEVICE)
+            return "device";
+    } else if (role.getTag() == PortRole::mode) {
+        if (role.get<PortRole::mode>() == PortMode::UFP)
+            return "sink";
+        if (role.get<PortRole::mode>() == PortMode::DFP)
+            return "source";
+    }
+    return "none";
+}
+
+void extractRole(string *roleName) {
+    std::size_t first, last;
+
+    first = roleName->find("[");
+    last = roleName->find("]");
+
+    if (first != string::npos && last != string::npos) {
+        *roleName = roleName->substr(first + 1, last - first - 1);
+    }
+}
+
+void switchToDrp(const string &portName) {
+    string filename = appendRoleNodeHelper(string(portName.c_str()), PortRole::mode);
+    FILE *fp;
+
+    if (filename != "") {
+        fp = fopen(filename.c_str(), "w");
+        if (fp != NULL) {
+            int ret = fputs("dual", fp);
+            fclose(fp);
+            if (ret == EOF)
+                ALOGE("Fatal: Error while switching back to drp");
+        } else {
+            ALOGE("Fatal: Cannot open file to switch back to drp");
+        }
+    } else {
+        ALOGE("Fatal: invalid node type");
+    }
+}
+
+bool switchMode(const string &portName, const PortRole &in_role, struct Usb *usb) {
+    string filename = appendRoleNodeHelper(string(portName.c_str()), in_role.getTag());
+    string written;
+    FILE *fp;
+    bool roleSwitch = false;
+
+    if (filename == "") {
+        ALOGE("Fatal: invalid node type");
+        return false;
+    }
+
+    fp = fopen(filename.c_str(), "w");
+    if (fp != NULL) {
+        // Hold the lock here to prevent loosing connected signals
+        // as once the file is written the partner added signal
+        // can arrive anytime.
+        pthread_mutex_lock(&usb->mPartnerLock);
+        usb->mPartnerUp = false;
+        int ret = fputs(convertRoletoString(in_role).c_str(), fp);
+        fclose(fp);
+
+        if (ret != EOF) {
+            struct timespec to;
+            struct timespec now;
+
+        wait_again:
+            clock_gettime(CLOCK_MONOTONIC, &now);
+            to.tv_sec = now.tv_sec + PORT_TYPE_TIMEOUT;
+            to.tv_nsec = now.tv_nsec;
+
+            int err = pthread_cond_timedwait(&usb->mPartnerCV, &usb->mPartnerLock, &to);
+            // There are no uevent signals which implies role swap timed out.
+            if (err == ETIMEDOUT) {
+                ALOGI("uevents wait timedout");
+                // Validity check.
+            } else if (!usb->mPartnerUp) {
+                goto wait_again;
+                // Role switch succeeded since usb->mPartnerUp is true.
+            } else {
+                roleSwitch = true;
+            }
+        } else {
+            ALOGI("Role switch failed while wrting to file");
+        }
+        pthread_mutex_unlock(&usb->mPartnerLock);
+    }
+
+    if (!roleSwitch)
+        switchToDrp(string(portName.c_str()));
+
+    return roleSwitch;
+}
+
+Usb::Usb()
+    : mLock(PTHREAD_MUTEX_INITIALIZER),
+      mRoleSwitchLock(PTHREAD_MUTEX_INITIALIZER),
+      mPartnerLock(PTHREAD_MUTEX_INITIALIZER),
+      mPartnerUp(false)
+{
+    pthread_condattr_t attr;
+    if (pthread_condattr_init(&attr)) {
+        ALOGE("pthread_condattr_init failed: %s", strerror(errno));
+        abort();
+    }
+    if (pthread_condattr_setclock(&attr, CLOCK_MONOTONIC)) {
+        ALOGE("pthread_condattr_setclock failed: %s", strerror(errno));
+        abort();
+    }
+    if (pthread_cond_init(&mPartnerCV, &attr)) {
+        ALOGE("pthread_cond_init failed: %s", strerror(errno));
+        abort();
+    }
+    if (pthread_condattr_destroy(&attr)) {
+        ALOGE("pthread_condattr_destroy failed: %s", strerror(errno));
+        abort();
+    }
+}
+
+ScopedAStatus Usb::switchRole(const string& in_portName,
+        const PortRole& in_role, int64_t in_transactionId) {
+    string filename = appendRoleNodeHelper(string(in_portName.c_str()), in_role.getTag());
+    string written;
+    FILE *fp;
+    bool roleSwitch = false;
+
+    if (filename == "") {
+        ALOGE("Fatal: invalid node type");
+        return ScopedAStatus::ok();
+    }
+
+    pthread_mutex_lock(&mRoleSwitchLock);
+
+    ALOGI("filename write: %s role:%s", filename.c_str(), convertRoletoString(in_role).c_str());
+
+    if (in_role.getTag() == PortRole::mode) {
+        roleSwitch = switchMode(in_portName, in_role, this);
+    } else {
+        fp = fopen(filename.c_str(), "w");
+        if (fp != NULL) {
+            int ret = fputs(convertRoletoString(in_role).c_str(), fp);
+            fclose(fp);
+            if ((ret != EOF) && ReadFileToString(filename, &written)) {
+                written = Trim(written);
+                extractRole(&written);
+                ALOGI("written: %s", written.c_str());
+                if (written == convertRoletoString(in_role)) {
+                    roleSwitch = true;
+                } else {
+                    ALOGE("Role switch failed");
+                }
+            } else {
+                ALOGE("failed to update the new role");
+            }
+        } else {
+            ALOGE("fopen failed");
+        }
+    }
+
+    pthread_mutex_lock(&mLock);
+    if (mCallback != NULL) {
+         ScopedAStatus ret = mCallback->notifyRoleSwitchStatus(
+            in_portName, in_role, roleSwitch ? Status::SUCCESS : Status::ERROR, in_transactionId);
+        if (!ret.isOk())
+            ALOGE("RoleSwitchStatus error %s", ret.getDescription().c_str());
+    } else {
+        ALOGE("Not notifying the userspace. Callback is not set");
+    }
+    pthread_mutex_unlock(&mLock);
+    pthread_mutex_unlock(&mRoleSwitchLock);
+
+    return ScopedAStatus::ok();
+}
+
+Status getAccessoryConnected(const string &portName, string *accessory) {
+    string filename = kTypecPath + portName + "-partner/accessory_mode";
+
+    if (!ReadFileToString(filename, accessory)) {
+        ALOGE("getAccessoryConnected: Failed to open filesystem node: %s", filename.c_str());
+        return Status::ERROR;
+    }
+    *accessory = Trim(*accessory);
+
+    return Status::SUCCESS;
+}
+
+Status getCurrentRoleHelper(const string &portName, bool connected, PortRole *currentRole) {
+    string filename;
+    string roleName;
+    string accessory;
+
+    // Mode
+
+    if (currentRole->getTag() == PortRole::powerRole) {
+        filename = kTypecPath + portName + kPowerRoleNode;
+        currentRole->set<PortRole::powerRole>(PortPowerRole::NONE);
+    } else if (currentRole->getTag() == PortRole::dataRole) {
+        filename = kTypecPath + portName + kDataRoleNode;
+        currentRole->set<PortRole::dataRole>(PortDataRole::NONE);
+    } else if (currentRole->getTag() == PortRole::mode) {
+        filename = kTypecPath + portName + kDataRoleNode;
+        currentRole->set<PortRole::mode>(PortMode::NONE);
+    } else {
+        return Status::ERROR;
+    }
+
+    if (!connected)
+        return Status::SUCCESS;
+
+    if (currentRole->getTag() == PortRole::mode) {
+        if (getAccessoryConnected(portName, &accessory) != Status::SUCCESS) {
+            return Status::ERROR;
+        }
+        if (accessory == "analog_audio") {
+            currentRole->set<PortRole::mode>(PortMode::AUDIO_ACCESSORY);
+            return Status::SUCCESS;
+        } else if (accessory == "debug") {
+            currentRole->set<PortRole::mode>(PortMode::DEBUG_ACCESSORY);
+            return Status::SUCCESS;
+        }
+    }
+
+    if (!ReadFileToString(filename, &roleName)) {
+        ALOGE("getCurrentRole: Failed to open filesystem node: %s", filename.c_str());
+        return Status::ERROR;
+    }
+
+    roleName = Trim(roleName);
+    extractRole(&roleName);
+
+    if (roleName == "source") {
+        currentRole->set<PortRole::powerRole>(PortPowerRole::SOURCE);
+    } else if (roleName == "sink") {
+        currentRole->set<PortRole::powerRole>(PortPowerRole::SINK);
+    } else if (roleName == "host") {
+        if (currentRole->getTag() == PortRole::dataRole)
+            currentRole->set<PortRole::dataRole>(PortDataRole::HOST);
+        else
+            currentRole->set<PortRole::mode>(PortMode::DFP);
+    } else if (roleName == "device") {
+        if (currentRole->getTag() == PortRole::dataRole)
+            currentRole->set<PortRole::dataRole>(PortDataRole::DEVICE);
+        else
+            currentRole->set<PortRole::mode>(PortMode::UFP);
+    } else if (roleName != "none") {
+        /* case for none has already been addressed.
+         * so we check if the role isn't none.
+         */
+        return Status::UNRECOGNIZED_ROLE;
+    }
+
+    return Status::SUCCESS;
+}
+
+Status getTypeCPortNamesHelper(std::unordered_map<string, bool> *names) {
+    DIR *dp;
+
+    dp = opendir(kTypecPath);
+    if (dp != NULL) {
+        struct dirent *ep;
+
+        while ((ep = readdir(dp))) {
+            if (ep->d_type == DT_LNK) {
+                if (string::npos == string(ep->d_name).find("-partner")) {
+                    std::unordered_map<string, bool>::const_iterator portName =
+                        names->find(ep->d_name);
+                    if (portName == names->end()) {
+                        names->insert({ep->d_name, false});
+                    }
+                } else {
+                    (*names)[std::strtok(ep->d_name, "-")] = true;
+                }
+            }
+        }
+        closedir(dp);
+        return Status::SUCCESS;
+    }
+
+    ALOGE("Failed to open /sys/class/typec");
+    return Status::ERROR;
+}
+
+bool canSwitchRoleHelper(const string &portName) {
+    string filename = kTypecPath + portName + "-partner/supports_usb_power_delivery";
+    string supportsPD;
+
+    if (ReadFileToString(filename, &supportsPD)) {
+        supportsPD = Trim(supportsPD);
+        if (supportsPD == "yes") {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+Status getPortStatusHelper(std::vector<PortStatus> *currentPortStatus) {
+    std::unordered_map<string, bool> names;
+    Status result = getTypeCPortNamesHelper(&names);
+    int i = -1;
+
+    if (result == Status::SUCCESS) {
+        currentPortStatus->resize(names.size());
+        for (std::pair<string, bool> port : names) {
+            i++;
+            ALOGI("%s", port.first.c_str());
+            (*currentPortStatus)[i].portName = port.first;
+
+            PortRole currentRole;
+            currentRole.set<PortRole::powerRole>(PortPowerRole::NONE);
+            if (getCurrentRoleHelper(port.first, port.second, &currentRole) == Status::SUCCESS){
+                (*currentPortStatus)[i].currentPowerRole = currentRole.get<PortRole::powerRole>();
+            } else {
+                ALOGE("Error while retrieving portNames");
+                goto done;
+            }
+
+            currentRole.set<PortRole::dataRole>(PortDataRole::NONE);
+            if (getCurrentRoleHelper(port.first, port.second, &currentRole) == Status::SUCCESS) {
+                (*currentPortStatus)[i].currentDataRole = currentRole.get<PortRole::dataRole>();
+            } else {
+                ALOGE("Error while retrieving current port role");
+                goto done;
+            }
+
+            currentRole.set<PortRole::mode>(PortMode::NONE);
+            if (getCurrentRoleHelper(port.first, port.second, &currentRole) == Status::SUCCESS) {
+                (*currentPortStatus)[i].currentMode = currentRole.get<PortRole::mode>();
+            } else {
+                ALOGE("Error while retrieving current data role");
+                goto done;
+            }
+
+            (*currentPortStatus)[i].canChangeMode = true;
+            (*currentPortStatus)[i].canChangeDataRole =
+                port.second ? canSwitchRoleHelper(port.first) : false;
+            (*currentPortStatus)[i].canChangePowerRole =
+                port.second ? canSwitchRoleHelper(port.first) : false;
+
+            (*currentPortStatus)[i].supportedModes.push_back(PortMode::DRP);
+            (*currentPortStatus)[i].usbDataEnabled = true;
+
+            ALOGI("%d:%s connected:%d canChangeMode:%d canChagedata:%d canChangePower:%d "
+                "usbDataEnabled:%d",
+                i, port.first.c_str(), port.second,
+                (*currentPortStatus)[i].canChangeMode,
+                (*currentPortStatus)[i].canChangeDataRole,
+                (*currentPortStatus)[i].canChangePowerRole, 0);
+        }
+
+        return Status::SUCCESS;
+    }
+done:
+    return Status::ERROR;
+}
+
+void queryVersionHelper(android::hardware::usb::Usb *usb,
+                        std::vector<PortStatus> *currentPortStatus) {
+    Status status;
+    pthread_mutex_lock(&usb->mLock);
+    status = getPortStatusHelper(currentPortStatus);
+    queryMoistureDetectionStatus(currentPortStatus);
+    if (usb->mCallback != NULL) {
+        ScopedAStatus ret = usb->mCallback->notifyPortStatusChange(*currentPortStatus,
+            status);
+        if (!ret.isOk())
+            ALOGE("queryPortStatus error %s", ret.getDescription().c_str());
+    } else {
+        ALOGI("Notifying userspace skipped. Callback is NULL");
+    }
+    pthread_mutex_unlock(&usb->mLock);
+}
+
+ScopedAStatus Usb::queryPortStatus(int64_t in_transactionId) {
+    std::vector<PortStatus> currentPortStatus;
+
+    queryVersionHelper(this, &currentPortStatus);
+    pthread_mutex_lock(&mLock);
+    if (mCallback != NULL) {
+        ScopedAStatus ret = mCallback->notifyQueryPortStatus(
+            "all", Status::SUCCESS, in_transactionId);
+        if (!ret.isOk())
+            ALOGE("notifyQueryPortStatus error %s", ret.getDescription().c_str());
+    } else {
+        ALOGE("Not notifying the userspace. Callback is not set");
+    }
+    pthread_mutex_unlock(&mLock);
+
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Usb::enableContaminantPresenceDetection(const string& in_portName,
+        bool /*in_enable*/, int64_t in_transactionId) {
+    std::vector<PortStatus> currentPortStatus;
+
+    pthread_mutex_lock(&mLock);
+    if (mCallback != NULL) {
+        ScopedAStatus ret = mCallback->notifyContaminantEnabledStatus(
+            in_portName, false, Status::ERROR, in_transactionId);
+        if (!ret.isOk())
+            ALOGE("enableContaminantPresenceDetection  error %s", ret.getDescription().c_str());
+    } else {
+        ALOGE("Not notifying the userspace. Callback is not set");
+    }
+    pthread_mutex_unlock(&mLock);
+
+    queryVersionHelper(this, &currentPortStatus);
+    return ScopedAStatus::ok();
+}
+
+
+struct data {
+    int uevent_fd;
+    ::aidl::android::hardware::usb::Usb *usb;
+};
+
+static void uevent_event(uint32_t /*epevents*/, struct data *payload) {
+    char msg[UEVENT_MSG_LEN + 2];
+    char *cp;
+    int n;
+
+    n = uevent_kernel_multicast_recv(payload->uevent_fd, msg, UEVENT_MSG_LEN);
+    if (n <= 0)
+        return;
+    if (n >= UEVENT_MSG_LEN) /* overflow -- discard */
+        return;
+
+    msg[n] = '\0';
+    msg[n + 1] = '\0';
+    cp = msg;
+
+    while (*cp) {
+        if (std::regex_match(cp, std::regex("(add)(.*)(-partner)"))) {
+            ALOGI("partner added");
+            pthread_mutex_lock(&payload->usb->mPartnerLock);
+            payload->usb->mPartnerUp = true;
+            pthread_cond_signal(&payload->usb->mPartnerCV);
+            pthread_mutex_unlock(&payload->usb->mPartnerLock);
+        } else if (!strncmp(cp, "DEVTYPE=typec_", strlen("DEVTYPE=typec_"))) {
+            std::vector<PortStatus> currentPortStatus;
+            queryVersionHelper(payload->usb, &currentPortStatus);
+
+            // Role switch is not in progress and port is in disconnected state
+            if (!pthread_mutex_trylock(&payload->usb->mRoleSwitchLock)) {
+                for (unsigned long i = 0; i < currentPortStatus.size(); i++) {
+                    DIR *dp =
+                        opendir(string(kTypecPath +
+                                       string(currentPortStatus[i].portName.c_str()) +
+                                       "-partner").c_str());
+                    if (dp == NULL) {
+                        switchToDrp(currentPortStatus[i].portName);
+                    } else {
+                        closedir(dp);
+                    }
+                }
+                pthread_mutex_unlock(&payload->usb->mRoleSwitchLock);
+            }
+            break;
+        } /* advance to after the next \0 */
+        while (*cp++) {
+        }
+    }
+}
+
+void *work(void *param) {
+    int epoll_fd, uevent_fd;
+    struct epoll_event ev;
+    int nevents = 0;
+    struct data payload;
+
+    uevent_fd = uevent_open_socket(UEVENT_MAX_EVENTS * UEVENT_MSG_LEN, true);
+
+    if (uevent_fd < 0) {
+        ALOGE("uevent_init: uevent_open_socket failed\n");
+        return NULL;
+    }
+
+    payload.uevent_fd = uevent_fd;
+    payload.usb = (::aidl::android::hardware::usb::Usb *)param;
+
+    fcntl(uevent_fd, F_SETFL, O_NONBLOCK);
+
+    ev.events = EPOLLIN;
+    ev.data.ptr = (void *)uevent_event;
+
+    epoll_fd = epoll_create(UEVENT_MAX_EVENTS);
+    if (epoll_fd == -1) {
+        ALOGE("epoll_create failed; errno=%d", errno);
+        goto error;
+    }
+
+    if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, uevent_fd, &ev) == -1) {
+        ALOGE("epoll_ctl failed; errno=%d", errno);
+        goto error;
+    }
+
+    while (!destroyThread) {
+        struct epoll_event events[UEVENT_MAX_EVENTS];
+
+        nevents = epoll_wait(epoll_fd, events, UEVENT_MAX_EVENTS, -1);
+        if (nevents == -1) {
+            if (errno == EINTR)
+                continue;
+            ALOGE("usb epoll_wait failed; errno=%d", errno);
+            break;
+        }
+
+        for (int n = 0; n < nevents; ++n) {
+            if (events[n].data.ptr)
+                (*(void (*)(int, struct data *payload))events[n].data.ptr)(events[n].events,
+                                                                           &payload);
+        }
+    }
+
+    ALOGI("exiting worker thread");
+error:
+    close(uevent_fd);
+
+    if (epoll_fd >= 0)
+        close(epoll_fd);
+
+    return NULL;
+}
+
+void sighandler(int sig) {
+    if (sig == SIGUSR1) {
+        destroyThread = true;
+        ALOGI("destroy set");
+        return;
+    }
+    signal(SIGUSR1, sighandler);
+}
+
+ScopedAStatus Usb::setCallback(
+        const shared_ptr<IUsbCallback>& in_callback) {
+
+    pthread_mutex_lock(&mLock);
+    if ((mCallback == NULL && in_callback == NULL) ||
+            (mCallback != NULL && in_callback != NULL)) {
+        mCallback = in_callback;
+        pthread_mutex_unlock(&mLock);
+        return ScopedAStatus::ok();
+    }
+
+    mCallback = in_callback;
+    ALOGI("registering callback");
+
+    if (mCallback == NULL) {
+        if  (!pthread_kill(mPoll, SIGUSR1)) {
+            pthread_join(mPoll, NULL);
+            ALOGI("pthread destroyed");
+        }
+        pthread_mutex_unlock(&mLock);
+        return ScopedAStatus::ok();
+    }
+
+    destroyThread = false;
+    signal(SIGUSR1, sighandler);
+
+    /*
+     * Create a background thread if the old callback value is NULL
+     * and being updated with a new value.
+     */
+    if (pthread_create(&mPoll, NULL, work, this)) {
+        ALOGE("pthread creation failed %d", errno);
+        mCallback = NULL;
+    }
+
+    pthread_mutex_unlock(&mLock);
+    return ScopedAStatus::ok();
+}
+
+} // namespace usb
+} // namespace hardware
+} // namespace android
+} // aidl
diff --git a/usb/aidl/default/Usb.h b/usb/aidl/default/Usb.h
new file mode 100644
index 0000000..bca86ae
--- /dev/null
+++ b/usb/aidl/default/Usb.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+#pragma once
+
+#include <android-base/file.h>
+#include <aidl/android/hardware/usb/BnUsb.h>
+#include <aidl/android/hardware/usb/BnUsbCallback.h>
+#include <utils/Log.h>
+
+#define UEVENT_MSG_LEN     2048
+#define UEVENT_MAX_EVENTS  64
+// The type-c stack waits for 4.5 - 5.5 secs before declaring a port non-pd.
+// The -partner directory would not be created until this is done.
+// Having a margin of ~3 secs for the directory and other related bookeeping
+// structures created and uvent fired.
+#define PORT_TYPE_TIMEOUT 8
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace usb {
+
+using ::aidl::android::hardware::usb::IUsbCallback;
+using ::aidl::android::hardware::usb::PortRole;
+using ::android::base::ReadFileToString;
+using ::android::base::WriteStringToFile;
+using ::android::sp;
+using ::ndk::ScopedAStatus;
+using ::std::shared_ptr;
+using ::std::string;
+
+struct Usb : public BnUsb {
+    Usb();
+
+    ScopedAStatus enableContaminantPresenceDetection(const std::string& in_portName,
+            bool in_enable, int64_t in_transactionId) override;
+    ScopedAStatus queryPortStatus(int64_t in_transactionId) override;
+    ScopedAStatus setCallback(const shared_ptr<IUsbCallback>& in_callback) override;
+    ScopedAStatus switchRole(const string& in_portName, const PortRole& in_role,
+            int64_t in_transactionId) override;
+    ScopedAStatus enableUsbData(const string& in_portName, bool in_enable,
+            int64_t in_transactionId) override;
+
+    shared_ptr<IUsbCallback> mCallback;
+    // Protects mCallback variable
+    pthread_mutex_t mLock;
+    // Protects roleSwitch operation
+    pthread_mutex_t mRoleSwitchLock;
+    // Threads waiting for the partner to come back wait here
+    pthread_cond_t mPartnerCV;
+    // lock protecting mPartnerCV
+    pthread_mutex_t mPartnerLock;
+    // Variable to signal partner coming back online after type switch
+    bool mPartnerUp;
+  private:
+    pthread_t mPoll;
+};
+
+} // namespace usb
+} // namespace hardware
+} // namespace android
+} // aidl
diff --git a/usb/aidl/default/android.hardware.usb-service.example.rc b/usb/aidl/default/android.hardware.usb-service.example.rc
new file mode 100644
index 0000000..335bca7
--- /dev/null
+++ b/usb/aidl/default/android.hardware.usb-service.example.rc
@@ -0,0 +1,4 @@
+service vendor.usb_default /vendor/bin/hw/android.hardware.usb-service.example
+    class hal
+    user system
+    group system
diff --git a/usb/aidl/default/android.hardware.usb-service.example.xml b/usb/aidl/default/android.hardware.usb-service.example.xml
new file mode 100644
index 0000000..6088194
--- /dev/null
+++ b/usb/aidl/default/android.hardware.usb-service.example.xml
@@ -0,0 +1,10 @@
+<manifest version="1.0" type="device">
+    <hal format="aidl">
+        <name>android.hardware.usb</name>
+        <version>1</version>
+        <interface>
+            <name>IUsb</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
+</manifest>
diff --git a/usb/aidl/default/service.cpp b/usb/aidl/default/service.cpp
new file mode 100644
index 0000000..398458a
--- /dev/null
+++ b/usb/aidl/default/service.cpp
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+#include <android-base/logging.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+
+#include "Usb.h"
+
+using ::aidl::android::hardware::usb::Usb;
+
+int main() {
+    ABinderProcess_setThreadPoolMaxThreadCount(0);
+    std::shared_ptr<Usb> usb = ndk::SharedRefBase::make<Usb>();
+
+    const std::string instance = std::string() + Usb::descriptor + "/default";
+    binder_status_t status = AServiceManager_addService(usb->asBinder().get(), instance.c_str());
+    CHECK(status == STATUS_OK);
+
+    ABinderProcess_joinThreadPool();
+    return -1; // Should never be reached
+}