diff --git a/wifi/1.0/IWifi.hal b/wifi/1.0/IWifi.hal
new file mode 100644
index 0000000..1feeb2a
--- /dev/null
+++ b/wifi/1.0/IWifi.hal
@@ -0,0 +1,73 @@
+/*
+ * 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.wifi@1.0;
+
+import IWifiChip;
+import IWifiEventCallback;
+
+/**
+ * This is the root of the HAL module and is the interface returned when
+ * loading an implementation of the Wi-Fi HAL. There must be at most one
+ * module loaded in the system.
+ */
+interface IWifi {
+  /**
+   * Requests notifications of significant events for the HAL. Multiple calls to
+   * this must register multiple callbacks each of which must receive all
+   * events. IWifiEventCallback registration must be independent of the state
+   * of the rest of the HAL and must persist though stops/starts.
+   */
+  @entry
+  @callflow(next={"*"})
+  oneway registerEventCallback(IWifiEventCallback callback);
+
+  /**
+   * Get the current state of the HAL.
+   */
+  isStarted() generates (bool started);
+
+  /**
+   * Perform any setup that is required to make use of the module. If the module
+   * is already started then this must be a noop. The onStart callback must be
+   * called when the setup completes or if the HAL is already started. If the
+   * setup fails then onStartFailure must be called.
+   */
+  @entry
+  @callflow(next={"registerEventCallback", "start", "stop", "getChip"})
+  oneway start();
+
+  /**
+   * Tear down any state, ongoing commands, etc. If the module is already
+   * stopped then this must be a noop. If the HAL is already stopped or it
+   * succeeds then onStop must be called. If the teardown fails onFailure must
+   * be called. After calling this all IWifiChip objects will be considered
+   * invalid.
+   *
+   * Calling stop then start is a valid way of resetting state in the HAL,
+   * driver, firmware.
+   */
+  @exit
+  @callflow(next={"registerEventCallback", "start", "stop"})
+  oneway stop();
+
+  // TODO(b/30570663) return vec<IWifiChip> instead
+  /**
+   * Get the configurable chip on the device.
+   */
+  @callflow(next={"*"})
+  getChip() generates (IWifiChip chip);
+};