wifi: Add firmware mode controller

am: a26a6e0807

Change-Id: I2b8cfeb08f88024157c945ec7a8b92c19ce296a0

wifi/1.0/default/Android.mk

@@ -24,6 +24,7 @@ LOCAL_SRC_FILES := \
     wifi_ap_iface.cpp \
     wifi_chip.cpp \
     wifi_legacy_hal.cpp \
+    wifi_mode_controller.cpp \
     wifi_nan_iface.cpp \
     wifi_p2p_iface.cpp \
     wifi_rtt_controller.cpp \
@@ -39,6 +40,7 @@ LOCAL_SHARED_LIBRARIES := \
     liblog \
     libnl \
     libutils \
+    libwifi-hal \
     libwifi-system
 LOCAL_WHOLE_STATIC_LIBRARIES := $(LIB_WIFI_HAL)
 LOCAL_INIT_RC := android.hardware.wifi@1.0-service.rc

wifi/1.0/default/wifi_mode_controller.cpp

@@ -0,0 +1,87 @@
+/*
+ * 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 <android-base/logging.h>
+#include <android-base/macros.h>
+#include <private/android_filesystem_config.h>
+
+#include "wifi_mode_controller.h"
+
+using android::hardware::wifi::V1_0::IfaceType;
+using android::wifi_hal::DriverTool;
+
+namespace {
+int convertIfaceTypeToFirmwareMode(IfaceType type) {
+  int mode;
+  switch (type) {
+    case IfaceType::AP:
+      mode = DriverTool::kFirmwareModeAp;
+      break;
+    case IfaceType::P2P:
+      mode = DriverTool::kFirmwareModeP2p;
+      break;
+    case IfaceType::NAN:
+      // NAN is exposed in STA mode currently.
+      mode = DriverTool::kFirmwareModeSta;
+      break;
+    case IfaceType::STA:
+      mode = DriverTool::kFirmwareModeSta;
+      break;
+  }
+  return mode;
+}
+}
+
+namespace android {
+namespace hardware {
+namespace wifi {
+namespace V1_0 {
+namespace implementation {
+namespace mode_controller {
+
+WifiModeController::WifiModeController() : driver_tool_(new DriverTool) {}
+
+bool WifiModeController::isFirmwareModeChangeNeeded(IfaceType type) {
+  return driver_tool_->IsFirmwareModeChangeNeeded(
+      convertIfaceTypeToFirmwareMode(type));
+}
+
+bool WifiModeController::changeFirmwareMode(IfaceType type) {
+  if (!driver_tool_->LoadDriver()) {
+    LOG(ERROR) << "Failed to load WiFi driver";
+    return false;
+  }
+  if (!driver_tool_->IsFirmwareModeChangeNeeded(
+          convertIfaceTypeToFirmwareMode(type))) {
+    LOG(ERROR) << "Failed to change firmware mode";
+    return false;
+  }
+  return true;
+}
+
+bool WifiModeController::deinitialize() {
+  if (!driver_tool_->UnloadDriver()) {
+    LOG(ERROR) << "Failed to unload WiFi driver";
+    return false;
+  }
+  return true;
+}
+}  // namespace mode_controller
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android

wifi/1.0/default/wifi_mode_controller.h

@@ -0,0 +1,59 @@
+/*
+ * 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.
+ */
+
+#ifndef WIFI_MODE_CONTROLLER_H_
+#define WIFI_MODE_CONTROLLER_H_
+
+#include <wifi_hal/driver_tool.h>
+
+#include <android/hardware/wifi/1.0/IWifi.h>
+
+namespace android {
+namespace hardware {
+namespace wifi {
+namespace V1_0 {
+namespace implementation {
+namespace mode_controller {
+/**
+ * Class that encapsulates all firmware mode configuration.
+ * This class will perform the necessary firmware reloads to put the chip in the
+ * required state (essentially a wrapper over DriverTool).
+ */
+class WifiModeController {
+ public:
+  WifiModeController();
+
+  // Checks if a firmware mode change is necessary to support the specified
+  // iface type operations.
+  bool isFirmwareModeChangeNeeded(IfaceType type);
+  // Change the firmware mode to support the specified iface type operations.
+  bool changeFirmwareMode(IfaceType type);
+  // Unload the driver. This should be invoked whenever |IWifi.stop()| is
+  // invoked.
+  bool deinitialize();
+
+ private:
+  std::unique_ptr<wifi_hal::DriverTool> driver_tool_;
+};
+
+}  // namespace mode_controller
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace wifi
+}  // namespace hardware
+}  // namespace android
+
+#endif  // WIFI_MODE_CONTROLLER_H_