wifi: Move legacy HAL implementation

Changes in the CL:
1. Move the legacy HAL implementation from
"frameworks/opt/net/wifi/wifi_hal_legacy" to
"hardware/interfaces/wifi/1.0/default".
2. Renamed the .rc file and the module name in makefile to
conform to the HIDL style guide.

Files renamed from:
wifi_hal_service.cpp/h -> wifi.cpp/h
wifi_chip_service.cpp/h -> wifi_chip.cpp/h
main.cpp -> service

Bug: 31821133
Test: mmma -j32 hardware/interfaces/wifi/1.0/default
Change-Id: I5e65e2fdb5596346bde6963588031dcea42d633a
diff --git a/wifi/1.0/default/failure_reason_util.cpp b/wifi/1.0/default/failure_reason_util.cpp
new file mode 100644
index 0000000..7fd2269
--- /dev/null
+++ b/wifi/1.0/default/failure_reason_util.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 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.
+ */
+
+#include "failure_reason_util.h"
+
+using ::android::hardware::wifi::V1_0::CommandFailureReason;
+
+namespace android {
+namespace hardware {
+namespace wifi {
+
+std::string LegacyErrorToString(wifi_error error) {
+  switch(error) {
+    case WIFI_SUCCESS:
+      return "SUCCESS";
+    case WIFI_ERROR_UNINITIALIZED:
+      return "UNINITIALIZED";
+    case WIFI_ERROR_NOT_AVAILABLE:
+      return "NOT_AVAILABLE";
+    case WIFI_ERROR_NOT_SUPPORTED:
+      return "NOT_SUPPORTED";
+    case WIFI_ERROR_INVALID_ARGS:
+      return "INVALID_ARGS";
+    case WIFI_ERROR_INVALID_REQUEST_ID:
+      return "INVALID_REQUEST_ID";
+    case WIFI_ERROR_TIMED_OUT:
+      return "TIMED_OUT";
+    case WIFI_ERROR_TOO_MANY_REQUESTS:
+      return "TOO_MANY_REQUESTS";
+    case WIFI_ERROR_OUT_OF_MEMORY:
+      return "OUT_OF_MEMORY";
+    case WIFI_ERROR_UNKNOWN:
+    default:
+      return "UNKNOWN";
+  }
+}
+
+V1_0::FailureReason CreateFailureReason(
+    CommandFailureReason reason, const std::string& description) {
+  V1_0::FailureReason result;
+  result.reason = reason;
+  result.description = description.data();
+  return result;
+}
+
+V1_0::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);
+
+    case WIFI_ERROR_NOT_SUPPORTED:
+      return CreateFailureReason(CommandFailureReason::NOT_SUPPORTED, desc);
+
+    case WIFI_ERROR_INVALID_ARGS:
+    case WIFI_ERROR_INVALID_REQUEST_ID:
+      return CreateFailureReason(CommandFailureReason::INVALID_ARGS, desc);
+
+    case WIFI_ERROR_TIMED_OUT:
+      return CreateFailureReason(
+          CommandFailureReason::UNKNOWN, desc + ", timed out");
+
+    case WIFI_ERROR_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");
+
+    case WIFI_ERROR_NONE:
+    case WIFI_ERROR_UNKNOWN:
+    default:
+      return CreateFailureReason(CommandFailureReason::UNKNOWN, "unknown");
+  }
+}
+
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android