diff --git a/wifi/1.0/default/failure_reason_util.cpp b/wifi/1.0/default/failure_reason_util.cpp
index 7fd226978a..f703ebe2c2 100644
--- a/wifi/1.0/default/failure_reason_util.cpp
+++ b/wifi/1.0/default/failure_reason_util.cpp
@@ -16,14 +16,14 @@
 
 #include "failure_reason_util.h"
 
-using ::android::hardware::wifi::V1_0::CommandFailureReason;
-
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
 std::string LegacyErrorToString(wifi_error error) {
-  switch(error) {
+  switch (error) {
     case WIFI_SUCCESS:
       return "SUCCESS";
     case WIFI_ERROR_UNINITIALIZED:
@@ -48,17 +48,17 @@ std::string LegacyErrorToString(wifi_error error) {
   }
 }
 
-V1_0::FailureReason CreateFailureReason(
-    CommandFailureReason reason, const std::string& description) {
-  V1_0::FailureReason result;
+FailureReason CreateFailureReason(CommandFailureReason reason,
+                                  const std::string& description) {
+  FailureReason result;
   result.reason = reason;
   result.description = description.data();
   return result;
 }
 
-V1_0::FailureReason CreateFailureReasonLegacyError(
-    wifi_error error, const std::string& desc) {
-  switch(error) {
+FailureReason CreateFailureReasonLegacyError(wifi_error error,
+                                             const std::string& desc) {
+  switch (error) {
     case WIFI_ERROR_UNINITIALIZED:
     case WIFI_ERROR_NOT_AVAILABLE:
       return CreateFailureReason(CommandFailureReason::NOT_AVAILABLE, desc);
@@ -71,16 +71,16 @@ V1_0::FailureReason CreateFailureReasonLegacyError(
       return CreateFailureReason(CommandFailureReason::INVALID_ARGS, desc);
 
     case WIFI_ERROR_TIMED_OUT:
-      return CreateFailureReason(
-          CommandFailureReason::UNKNOWN, desc + ", timed out");
+      return CreateFailureReason(CommandFailureReason::UNKNOWN,
+                                 desc + ", timed out");
 
     case WIFI_ERROR_TOO_MANY_REQUESTS:
-      return CreateFailureReason(
-          CommandFailureReason::UNKNOWN, desc + ", too many requests");
+      return CreateFailureReason(CommandFailureReason::UNKNOWN,
+                                 desc + ", too many requests");
 
     case WIFI_ERROR_OUT_OF_MEMORY:
-      return CreateFailureReason(
-          CommandFailureReason::UNKNOWN, desc + ", out of memory");
+      return CreateFailureReason(CommandFailureReason::UNKNOWN,
+                                 desc + ", out of memory");
 
     case WIFI_ERROR_NONE:
     case WIFI_ERROR_UNKNOWN:
@@ -89,6 +89,8 @@ V1_0::FailureReason CreateFailureReasonLegacyError(
   }
 }
 
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android
diff --git a/wifi/1.0/default/failure_reason_util.h b/wifi/1.0/default/failure_reason_util.h
index d731700347..7d51bbf2fe 100644
--- a/wifi/1.0/default/failure_reason_util.h
+++ b/wifi/1.0/default/failure_reason_util.h
@@ -23,14 +23,18 @@
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
 std::string LegacyErrorToString(wifi_error error);
 
-V1_0::FailureReason CreateFailureReason(
-    V1_0::CommandFailureReason reason, const std::string& description);
-V1_0::FailureReason CreateFailureReasonLegacyError(
-    wifi_error error, const std::string& description);
+FailureReason CreateFailureReason(CommandFailureReason reason,
+                                  const std::string& description);
+FailureReason CreateFailureReasonLegacyError(wifi_error error,
+                                             const std::string& description);
 
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android
diff --git a/wifi/1.0/default/service.cpp b/wifi/1.0/default/service.cpp
index a96584b701..07e6c81e0d 100644
--- a/wifi/1.0/default/service.cpp
+++ b/wifi/1.0/default/service.cpp
@@ -36,15 +36,15 @@ int OnBinderReadReady(int /*fd*/, int /*events*/, void* /*data*/) {
 }
 
 int main(int /*argc*/, char** argv) {
-  android::base::InitLogging(
-      argv, android::base::LogdLogger(android::base::SYSTEM));
+  android::base::InitLogging(argv,
+                             android::base::LogdLogger(android::base::SYSTEM));
   LOG(INFO) << "wifi_hal_legacy is starting up...";
 
   // Setup binder
   int binder_fd = -1;
   ProcessState::self()->setThreadPoolMaxThreadCount(0);
-  CHECK_EQ(IPCThreadState::self()->setupPolling(&binder_fd),
-           android::NO_ERROR) << "Failed to initialize binder polling";
+  CHECK_EQ(IPCThreadState::self()->setupPolling(&binder_fd), android::NO_ERROR)
+      << "Failed to initialize binder polling";
   CHECK_GE(binder_fd, 0) << "Invalid binder FD: " << binder_fd;
 
   // Setup looper
@@ -54,13 +54,14 @@ int main(int /*argc*/, char** argv) {
       << "Failed to watch binder FD";
 
   // Setup hwbinder service
-  android::sp<android::hardware::wifi::Wifi> service =
-      new android::hardware::wifi::Wifi(looper);
-  CHECK_EQ(service->registerAsService("wifi"),
-           android::NO_ERROR) << "Failed to register wifi HAL";
+  android::sp<android::hardware::wifi::V1_0::IWifi> service =
+      new android::hardware::wifi::V1_0::implementation::Wifi(looper);
+  CHECK_EQ(service->registerAsService("wifi"), android::NO_ERROR)
+      << "Failed to register wifi HAL";
 
   // Loop
-  while (looper->pollAll(-1) != Looper::POLL_ERROR);
+  while (looper->pollAll(-1) != Looper::POLL_ERROR)
+    ;
 
   LOG(INFO) << "wifi_hal_legacy is terminating...";
   return 0;
diff --git a/wifi/1.0/default/wifi.cpp b/wifi/1.0/default/wifi.cpp
index 0e10bfbcff..aa0fc5b65f 100644
--- a/wifi/1.0/default/wifi.cpp
+++ b/wifi/1.0/default/wifi.cpp
@@ -22,7 +22,6 @@
 #include "failure_reason_util.h"
 #include "wifi_chip.h"
 
-using ::android::hardware::wifi::V1_0::CommandFailureReason;
 using RunState = ::android::hardware::wifi::WifiHalState::RunState;
 
 namespace {
@@ -36,6 +35,8 @@ std::string GetWlanInterfaceName() {
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
 Wifi::Wifi(sp<Looper>& looper) : state_(looper) {
   CHECK_EQ(init_wifi_vendor_hal_func_table(&state_.func_table_), WIFI_SUCCESS)
@@ -43,7 +44,7 @@ Wifi::Wifi(sp<Looper>& looper) : state_(looper) {
 }
 
 Return<void> Wifi::registerEventCallback(
-    const sp<V1_0::IWifiEventCallback>& callback) {
+    const sp<IWifiEventCallback>& callback) {
   // TODO(b/31632518): remove the callback when the client is destroyed
   callbacks_.insert(callback);
   return Void();
@@ -72,8 +73,8 @@ Return<void> Wifi::start() {
   if (status != WIFI_SUCCESS) {
     LOG(ERROR) << "Failed to initialize Wifi HAL";
     for (auto& callback : callbacks_) {
-      callback->onStartFailure(CreateFailureReasonLegacyError(
-          status, "Failed to initialize HAL"));
+      callback->onStartFailure(
+          CreateFailureReasonLegacyError(status, "Failed to initialize HAL"));
     }
     return Void();
   }
@@ -95,8 +96,7 @@ Return<void> Wifi::start() {
   return Void();
 }
 
-wifi_interface_handle Wifi::FindInterfaceHandle(
-    const std::string& ifname) {
+wifi_interface_handle Wifi::FindInterfaceHandle(const std::string& ifname) {
   int num_iface_handles = 0;
   wifi_interface_handle* iface_handles = nullptr;
   wifi_error ret = state_.func_table_.wifi_get_ifaces(
@@ -124,7 +124,6 @@ wifi_interface_handle Wifi::FindInterfaceHandle(
   return kInterfaceNotFoundHandle;
 }
 
-
 void NoopHalCleanupHandler(wifi_handle) {}
 
 Return<void> Wifi::stop() {
@@ -142,7 +141,8 @@ Return<void> Wifi::stop() {
   awaiting_hal_event_loop_termination_ = true;
   state_.run_state_ = RunState::STOPPING;
 
-  if (chip_.get()) chip_->Invalidate();
+  if (chip_.get())
+    chip_->Invalidate();
   chip_.clear();
 
   state_.func_table_.wifi_cleanup(state_.hal_handle_, NoopHalCleanupHandler);
@@ -160,10 +160,10 @@ void Wifi::DoHalEventLoop() {
   }
   LOG(VERBOSE) << "HAL Event loop terminated";
   event_loop_thread_.detach();
-  state_.PostTask([this](){
-      awaiting_hal_event_loop_termination_ = false;
-      FinishHalCleanup();
-    });
+  state_.PostTask([this]() {
+    awaiting_hal_event_loop_termination_ = false;
+    FinishHalCleanup();
+  });
 }
 
 void Wifi::FinishHalCleanup() {
@@ -176,12 +176,13 @@ void Wifi::FinishHalCleanup() {
   }
 }
 
-
 Return<void> Wifi::getChip(getChip_cb cb) {
   cb(chip_);
   return Void();
 }
 
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android
diff --git a/wifi/1.0/default/wifi.h b/wifi/1.0/default/wifi.h
index 92712fd961..01227418a1 100644
--- a/wifi/1.0/default/wifi.h
+++ b/wifi/1.0/default/wifi.h
@@ -21,25 +21,26 @@
 #include <set>
 #include <thread>
 
-#include <android/hardware/wifi/1.0/IWifi.h>
 #include <android-base/macros.h>
+#include <android/hardware/wifi/1.0/IWifi.h>
 #include <hardware_legacy/wifi_hal.h>
 #include <utils/Looper.h>
 
 #include "wifi_hal_state.h"
+#include "wifi_chip.h"
 
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
-class WifiChip;
-
-class Wifi : public V1_0::IWifi {
+class Wifi : public IWifi {
  public:
   Wifi(sp<Looper>& looper);
 
   Return<void> registerEventCallback(
-      const sp<V1_0::IWifiEventCallback>& callback) override;
+      const sp<IWifiEventCallback>& callback) override;
 
   Return<bool> isStarted() override;
   Return<void> start() override;
@@ -63,7 +64,7 @@ class Wifi : public V1_0::IWifi {
    */
   void DoHalEventLoop();
 
-  std::set<sp<V1_0::IWifiEventCallback>> callbacks_;
+  std::set<sp<IWifiEventCallback>> callbacks_;
   sp<WifiChip> chip_;
 
   WifiHalState state_;
@@ -76,6 +77,8 @@ class Wifi : public V1_0::IWifi {
   DISALLOW_COPY_AND_ASSIGN(Wifi);
 };
 
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android
diff --git a/wifi/1.0/default/wifi_chip.cpp b/wifi/1.0/default/wifi_chip.cpp
index e794f538a0..42118b75d2 100644
--- a/wifi/1.0/default/wifi_chip.cpp
+++ b/wifi/1.0/default/wifi_chip.cpp
@@ -23,9 +23,11 @@
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
-WifiChip::WifiChip(
-    WifiHalState* hal_state, wifi_interface_handle interface_handle)
+WifiChip::WifiChip(WifiHalState* hal_state,
+                   wifi_interface_handle interface_handle)
     : hal_state_(hal_state), interface_handle_(interface_handle) {}
 
 void WifiChip::Invalidate() {
@@ -34,8 +36,9 @@ void WifiChip::Invalidate() {
 }
 
 Return<void> WifiChip::registerEventCallback(
-    const sp<V1_0::IWifiChipEventCallback>& callback) {
-  if (!hal_state_) return Void();
+    const sp<IWifiChipEventCallback>& callback) {
+  if (!hal_state_)
+    return Void();
   // TODO(b/31632518): remove the callback when the client is destroyed
   callbacks_.insert(callback);
   return Void();
@@ -52,21 +55,24 @@ Return<void> WifiChip::getAvailableModes(getAvailableModes_cb cb) {
 }
 
 Return<void> WifiChip::configureChip(uint32_t /*mode_id*/) {
-  if (!hal_state_) return Void();
+  if (!hal_state_)
+    return Void();
   // TODO add implementation
   return Void();
 }
 
 Return<uint32_t> WifiChip::getMode() {
-  if (!hal_state_) return 0;
+  if (!hal_state_)
+    return 0;
   // TODO add implementation
   return 0;
 }
 
 Return<void> WifiChip::requestChipDebugInfo() {
-  if (!hal_state_) return Void();
+  if (!hal_state_)
+    return Void();
 
-  V1_0::IWifiChipEventCallback::ChipDebugInfo result;
+  IWifiChipEventCallback::ChipDebugInfo result;
   result.driverDescription = "<unknown>";
   result.firmwareDescription = "<unknown>";
   char buffer[256];
@@ -110,7 +116,8 @@ Return<void> WifiChip::requestFirmwareDebugDump() {
   return Void();
 }
 
-
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android
diff --git a/wifi/1.0/default/wifi_chip.h b/wifi/1.0/default/wifi_chip.h
index 583c15185e..d776644581 100644
--- a/wifi/1.0/default/wifi_chip.h
+++ b/wifi/1.0/default/wifi_chip.h
@@ -19,8 +19,8 @@
 
 #include <set>
 
-#include <android/hardware/wifi/1.0/IWifiChip.h>
 #include <android-base/macros.h>
+#include <android/hardware/wifi/1.0/IWifiChip.h>
 #include <hardware_legacy/wifi_hal.h>
 
 #include "wifi_hal_state.h"
@@ -28,16 +28,17 @@
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
-class WifiChip : public V1_0::IWifiChip {
+class WifiChip : public IWifiChip {
  public:
-  WifiChip(
-      WifiHalState* hal_state, wifi_interface_handle interface_handle);
+  WifiChip(WifiHalState* hal_state, wifi_interface_handle interface_handle);
 
   void Invalidate();
 
   Return<void> registerEventCallback(
-      const sp<V1_0::IWifiChipEventCallback>& callback) override;
+      const sp<IWifiChipEventCallback>& callback) override;
 
   Return<void> getAvailableModes(getAvailableModes_cb cb) override;
 
@@ -54,11 +55,13 @@ class WifiChip : public V1_0::IWifiChip {
  private:
   WifiHalState* hal_state_;
   wifi_interface_handle interface_handle_;
-  std::set<sp<V1_0::IWifiChipEventCallback>> callbacks_;
+  std::set<sp<IWifiChipEventCallback>> callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(WifiChip);
 };
 
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android
diff --git a/wifi/1.0/default/wifi_hal_state.cpp b/wifi/1.0/default/wifi_hal_state.cpp
index 11387d83d2..148368996a 100644
--- a/wifi/1.0/default/wifi_hal_state.cpp
+++ b/wifi/1.0/default/wifi_hal_state.cpp
@@ -24,8 +24,7 @@ namespace {
 class FunctionMessageHandler : public android::MessageHandler {
  public:
   explicit FunctionMessageHandler(const std::function<void()>& callback)
-      : callback_(callback) {
-  }
+      : callback_(callback) {}
 
   ~FunctionMessageHandler() override = default;
 
@@ -43,16 +42,19 @@ class FunctionMessageHandler : public android::MessageHandler {
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
 WifiHalState::WifiHalState(sp<Looper>& looper)
     : run_state_(RunState::STOPPED), looper_(looper) {}
 
 void WifiHalState::PostTask(const std::function<void()>& callback) {
-  sp<MessageHandler> message_handler =
-      new FunctionMessageHandler(callback);
+  sp<MessageHandler> message_handler = new FunctionMessageHandler(callback);
   looper_->sendMessage(message_handler, NULL);
 }
 
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android
diff --git a/wifi/1.0/default/wifi_hal_state.h b/wifi/1.0/default/wifi_hal_state.h
index 6b9fc53acd..40e39ec424 100644
--- a/wifi/1.0/default/wifi_hal_state.h
+++ b/wifi/1.0/default/wifi_hal_state.h
@@ -26,6 +26,8 @@
 namespace android {
 namespace hardware {
 namespace wifi {
+namespace V1_0 {
+namespace implementation {
 
 /**
  * Class that stores common state and functionality shared between HAL services.
@@ -41,11 +43,7 @@ class WifiHalState {
   /** opaque handle from vendor for use while HAL is running */
   wifi_handle hal_handle_;
 
-  enum class RunState {
-    STOPPED,
-    STARTED,
-    STOPPING
-  };
+  enum class RunState { STOPPED, STARTED, STOPPING };
 
   RunState run_state_;
 
@@ -55,6 +53,8 @@ class WifiHalState {
   DISALLOW_COPY_AND_ASSIGN(WifiHalState);
 };
 
+}  // namespace implementation
+}  // namespace V1_0
 }  // namespace wifi
 }  // namespace hardware
 }  // namespace android