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/wifi_chip.cpp b/wifi/1.0/default/wifi_chip.cpp
new file mode 100644
index 0000000..e794f53
--- /dev/null
+++ b/wifi/1.0/default/wifi_chip.cpp
@@ -0,0 +1,116 @@
+/*
+ * 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 "wifi_chip.h"
+
+#include <android-base/logging.h>
+
+#include "failure_reason_util.h"
+
+namespace android {
+namespace hardware {
+namespace wifi {
+
+WifiChip::WifiChip(
+    WifiHalState* hal_state, wifi_interface_handle interface_handle)
+    : hal_state_(hal_state), interface_handle_(interface_handle) {}
+
+void WifiChip::Invalidate() {
+  hal_state_ = nullptr;
+  callbacks_.clear();
+}
+
+Return<void> WifiChip::registerEventCallback(
+    const sp<V1_0::IWifiChipEventCallback>& callback) {
+  if (!hal_state_) return Void();
+  // TODO(b/31632518): remove the callback when the client is destroyed
+  callbacks_.insert(callback);
+  return Void();
+}
+
+Return<void> WifiChip::getAvailableModes(getAvailableModes_cb cb) {
+  if (!hal_state_) {
+    cb(hidl_vec<ChipMode>());
+    return Void();
+  } else {
+    // TODO add implementation
+    return Void();
+  }
+}
+
+Return<void> WifiChip::configureChip(uint32_t /*mode_id*/) {
+  if (!hal_state_) return Void();
+  // TODO add implementation
+  return Void();
+}
+
+Return<uint32_t> WifiChip::getMode() {
+  if (!hal_state_) return 0;
+  // TODO add implementation
+  return 0;
+}
+
+Return<void> WifiChip::requestChipDebugInfo() {
+  if (!hal_state_) return Void();
+
+  V1_0::IWifiChipEventCallback::ChipDebugInfo result;
+  result.driverDescription = "<unknown>";
+  result.firmwareDescription = "<unknown>";
+  char buffer[256];
+
+  // get driver version
+  bzero(buffer, sizeof(buffer));
+  wifi_error ret = hal_state_->func_table_.wifi_get_driver_version(
+      interface_handle_, buffer, sizeof(buffer));
+  if (ret == WIFI_SUCCESS) {
+    result.driverDescription = buffer;
+  } else {
+    LOG(WARNING) << "Failed to get driver version: "
+                 << LegacyErrorToString(ret);
+  }
+
+  // get firmware version
+  bzero(buffer, sizeof(buffer));
+  ret = hal_state_->func_table_.wifi_get_firmware_version(
+      interface_handle_, buffer, sizeof(buffer));
+  if (ret == WIFI_SUCCESS) {
+    result.firmwareDescription = buffer;
+  } else {
+    LOG(WARNING) << "Failed to get firmware version: "
+                 << LegacyErrorToString(ret);
+  }
+
+  // send callback
+  for (auto& callback : callbacks_) {
+    callback->onChipDebugInfoAvailable(result);
+  }
+  return Void();
+}
+
+Return<void> WifiChip::requestDriverDebugDump() {
+  // TODO implement
+  return Void();
+}
+
+Return<void> WifiChip::requestFirmwareDebugDump() {
+  // TODO implement
+  return Void();
+}
+
+
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android