diff --git a/nfc/1.0/Android.mk b/nfc/1.0/Android.mk
index 07775e9..b6840bc 100644
--- a/nfc/1.0/Android.mk
+++ b/nfc/1.0/Android.mk
@@ -13,9 +13,9 @@
 HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
 
 #
-# Build types.hal (NfcEvent)
+# Build types.hal (nfc_data_t)
 #
-GEN := $(intermediates)/android/hardware/nfc/1.0/NfcEvent.java
+GEN := $(intermediates)/android/hardware/nfc/1.0/nfc_data_t.java
 $(GEN): $(HIDL)
 $(GEN): PRIVATE_HIDL := $(HIDL)
 $(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
@@ -23,16 +23,16 @@
 $(GEN): PRIVATE_CUSTOM_TOOL = \
         $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
         -Ljava -randroid.hardware:hardware/interfaces \
-        android.hardware.nfc@1.0::types.NfcEvent
+        android.hardware.nfc@1.0::types.nfc_data_t
 
 $(GEN): $(LOCAL_PATH)/types.hal
 	$(transform-generated-source)
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
-# Build types.hal (NfcStatus)
+# Build types.hal (nfc_event_t)
 #
-GEN := $(intermediates)/android/hardware/nfc/1.0/NfcStatus.java
+GEN := $(intermediates)/android/hardware/nfc/1.0/nfc_event_t.java
 $(GEN): $(HIDL)
 $(GEN): PRIVATE_HIDL := $(HIDL)
 $(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
@@ -40,7 +40,24 @@
 $(GEN): PRIVATE_CUSTOM_TOOL = \
         $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
         -Ljava -randroid.hardware:hardware/interfaces \
-        android.hardware.nfc@1.0::types.NfcStatus
+        android.hardware.nfc@1.0::types.nfc_event_t
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (nfc_status_t)
+#
+GEN := $(intermediates)/android/hardware/nfc/1.0/nfc_status_t.java
+$(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.nfc@1.0::types.nfc_status_t
 
 $(GEN): $(LOCAL_PATH)/types.hal
 	$(transform-generated-source)
@@ -99,9 +116,9 @@
 HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
 
 #
-# Build types.hal (NfcEvent)
+# Build types.hal (nfc_data_t)
 #
-GEN := $(intermediates)/android/hardware/nfc/1.0/NfcEvent.java
+GEN := $(intermediates)/android/hardware/nfc/1.0/nfc_data_t.java
 $(GEN): $(HIDL)
 $(GEN): PRIVATE_HIDL := $(HIDL)
 $(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
@@ -109,16 +126,16 @@
 $(GEN): PRIVATE_CUSTOM_TOOL = \
         $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
         -Ljava -randroid.hardware:hardware/interfaces \
-        android.hardware.nfc@1.0::types.NfcEvent
+        android.hardware.nfc@1.0::types.nfc_data_t
 
 $(GEN): $(LOCAL_PATH)/types.hal
 	$(transform-generated-source)
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
-# Build types.hal (NfcStatus)
+# Build types.hal (nfc_event_t)
 #
-GEN := $(intermediates)/android/hardware/nfc/1.0/NfcStatus.java
+GEN := $(intermediates)/android/hardware/nfc/1.0/nfc_event_t.java
 $(GEN): $(HIDL)
 $(GEN): PRIVATE_HIDL := $(HIDL)
 $(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
@@ -126,7 +143,24 @@
 $(GEN): PRIVATE_CUSTOM_TOOL = \
         $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
         -Ljava -randroid.hardware:hardware/interfaces \
-        android.hardware.nfc@1.0::types.NfcStatus
+        android.hardware.nfc@1.0::types.nfc_event_t
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (nfc_status_t)
+#
+GEN := $(intermediates)/android/hardware/nfc/1.0/nfc_status_t.java
+$(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.nfc@1.0::types.nfc_status_t
 
 $(GEN): $(LOCAL_PATH)/types.hal
 	$(transform-generated-source)
diff --git a/nfc/1.0/INfc.hal b/nfc/1.0/INfc.hal
index f003b2c..88fd39a 100644
--- a/nfc/1.0/INfc.hal
+++ b/nfc/1.0/INfc.hal
@@ -27,7 +27,7 @@
      * NCI initialization - ie accept CORE_RESET and subsequent commands through
      * the write() call.
      *
-     * If open() returns 0, the NCI stack will wait for a NfcEvent.OPEN_CPLT
+     * If open() returns 0, the NCI stack will wait for a HAL_NFC_OPEN_CPLT_EVT
      * before continuing.
      *
      * If open() returns any other value, the NCI stack will stop.
@@ -41,32 +41,32 @@
      * This method may queue writes and return immediately. The only
      * requirement is that the writes are executed in order.
      */
-    write(NfcData data) generates (int32_t retval);
+    write(nfc_data_t data) generates (int32_t retval);
 
     /*
-     * coreInitialized() is called after the CORE_INIT_RSP is received from the NFCC.
+     * core_initialized() is called after the CORE_INIT_RSP is received from the NFCC.
      * At this time, the HAL can do any chip-specific configuration.
      *
-     * If coreInitialized() returns 0, the NCI stack will wait for a NfcEvent.POST_INIT_CPLT
+     * If core_initialized() returns 0, the NCI stack will wait for a HAL_NFC_POST_INIT_CPLT_EVT
      * before continuing.
      *
-     * If coreInitialized() returns any other value, the NCI stack will continue
+     * If core_initialized() returns any other value, the NCI stack will continue
      * immediately.
      */
-    coreInitialized(NfcData data) generates (int32_t retval);
+    core_initialized(vec<uint8_t> data) generates (int32_t retval);
 
     /*
-     * prediscover is called every time before starting RF discovery.
+     * pre_discover is called every time before starting RF discovery.
      * It is a good place to do vendor-specific configuration that must be
      * performed every time RF discovery is about to be started.
      *
-     * If prediscover() returns 0, the NCI stack will wait for a NfcEvent.PREDISCOVER_CPLT
+     * If pre_discover() returns 0, the NCI stack will wait for a HAL_NFC_PRE_DISCOVER_CPLT_EVT
      * before continuing.
      *
-     * If prediscover() returns any other value, the NCI stack will start
+     * If pre_discover() returns any other value, the NCI stack will start
      * RF discovery immediately.
      */
-    prediscover() generates (int32_t retval);
+    pre_discover() generates (int32_t retval);
 
     /*
      * Close the NFC controller. Should free all resources.
@@ -75,15 +75,15 @@
 
     /*
      * Grant HAL the exclusive control to send NCI commands.
-     * Called in response to NfcEvent.REQUEST_CONTROL.
+     * Called in response to HAL_REQUEST_CONTROL_EVT.
      * Must only be called when there are no NCI commands pending.
-     * NfcEvent.RELEASE_CONTROL will notify when HAL no longer needs exclusive control.
+     * HAL_RELEASE_CONTROL_EVT will notify when HAL no longer needs exclusive control.
      */
-    controlGranted() generates (int32_t retval);
+    control_granted() generates (int32_t retval);
 
      /*
      * Restart controller by power cyle;
-     * NfcEvent.OPEN_CPLT will notify when operation is complete.
+     * HAL_OPEN_CPLT_EVT will notify when operation is complete.
      */
-    powerCycle() generates (int32_t retval);
+    power_cycle() generates (int32_t retval);
 };
diff --git a/nfc/1.0/INfcClientCallback.hal b/nfc/1.0/INfcClientCallback.hal
index a56cc09..f10062e 100644
--- a/nfc/1.0/INfcClientCallback.hal
+++ b/nfc/1.0/INfcClientCallback.hal
@@ -21,11 +21,11 @@
      * The callback passed in from the NFC stack that the HAL
      * can use to pass events back to the stack.
      */
-    sendEvent(NfcEvent event, NfcStatus status);
+    sendEvent(nfc_event_t event, nfc_status_t event_status);
 
     /*
      * The callback passed in from the NFC stack that the HAL
      * can use to pass incomming data to the stack.
      */
-    sendData(NfcData data);
+    sendData(nfc_data_t data);
 };
diff --git a/nfc/1.0/types.hal b/nfc/1.0/types.hal
index a266178..738dfd9 100644
--- a/nfc/1.0/types.hal
+++ b/nfc/1.0/types.hal
@@ -16,22 +16,24 @@
 
 package android.hardware.nfc@1.0;
 
-enum NfcEvent : uint32_t {
-    OPEN_CPLT           = 0,
-    CLOSE_CPLT          = 1,
-    POST_INIT_CPLT      = 2,
-    PRE_DISCOVER_CPLT   = 3,
-    REQUEST_CONTROL     = 4,
-    RELEASE_CONTROL     = 5,
-    ERROR               = 6
+enum nfc_event_t : uint32_t {
+    HAL_NFC_OPEN_CPLT_EVT           = 0,
+    HAL_NFC_CLOSE_CPLT_EVT          = 1,
+    HAL_NFC_POST_INIT_CPLT_EVT      = 2,
+    HAL_NFC_PRE_DISCOVER_CPLT_EVT   = 3,
+    HAL_NFC_REQUEST_CONTROL_EVT     = 4,
+    HAL_NFC_RELEASE_CONTROL_EVT     = 5,
+    HAL_NFC_ERROR_EVT               = 6
 };
 
-enum NfcStatus : uint32_t {
-    OK               = 0,
-    FAILED           = 1,
-    ERR_TRANSPORT    = 2,
-    ERR_CMD_TIMEOUT  = 3,
-    REFUSED          = 4
+enum nfc_status_t : uint32_t {
+    HAL_NFC_STATUS_OK               = 0,
+    HAL_NFC_STATUS_FAILED           = 1,
+    HAL_NFC_STATUS_ERR_TRANSPORT    = 2,
+    HAL_NFC_STATUS_ERR_CMD_TIMEOUT  = 3,
+    HAL_NFC_STATUS_REFUSED          = 4
 };
 
-typedef vec<uint8_t> NfcData;
+struct nfc_data_t {
+    vec<uint8_t> data;
+};