Wrap vendor provided HAL in libwifi-hal

While here, fix the include paths so that we explicitly refer to the
headers in hardware_legacy.

Bug: 29396611
Test: Compiles, can associate to an AP on angler/bullhead
Test: runtest frameworks-wifi continues to pass

Change-Id: Ic76ce613b80eb9b3200699c5e1dd083a43e2b1c5

13 files changed, 119 insertions, 80 deletions

diff --git a/libwifi_hal/Android.mk b/libwifi_hal/Android.mk
new file mode 100644
index 000000000..e83c25e47
--- /dev/null
+++ b/libwifi_hal/Android.mk
@@ -0,0 +1,65 @@
+# 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.
+
+LOCAL_PATH := $(call my-dir)
+ifneq ($(TARGET_BUILD_PDK), true)
+
+# A fallback "vendor" HAL library.
+# Don't link this, link libwifi-hal.
+# ============================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := libwifi-hal-fallback
+LOCAL_CFLAGS := \
+    -Wall \
+    -Werror \
+    -Wextra \
+    -Winit-self \
+    -Wno-unused-function \
+    -Wno-unused-parameter \
+    -Wshadow \
+    -Wunused-variable \
+    -Wwrite-strings
+LOCAL_SRC_FILES := wifi_hal_fallback.cpp
+LOCAL_C_INCLUDES := $(call include-path-for, libhardware_legacy)
+include $(BUILD_STATIC_LIBRARY)
+
+# Pick a vendor provided HAL implementation library.
+# ============================================================
+LIB_WIFI_HAL := libwifi-hal-fallback
+ifeq ($(BOARD_WLAN_DEVICE), bcmdhd)
+  LIB_WIFI_HAL := libwifi-hal-bcm
+else ifeq ($(BOARD_WLAN_DEVICE), qcwcn)
+  LIB_WIFI_HAL := libwifi-hal-qcom
+else ifeq ($(BOARD_WLAN_DEVICE), mrvl)
+  # this is commented because none of the nexus devices
+  # that sport Marvell's wifi have support for HAL
+  # LIB_WIFI_HAL := libwifi-hal-mrvl
+else ifeq ($(BOARD_WLAN_DEVICE), MediaTek)
+  # support MTK WIFI HAL
+  LIB_WIFI_HAL := libwifi-hal-mt66xx
+endif
+
+# The WiFi HAL that you should be linking.
+# ============================================================
+include $(CLEAR_VARS)
+LOCAL_MODULE := libwifi-hal
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(call include-path-for, libhardware_legacy)
+LOCAL_SHARED_LIBRARIES := \
+    liblog \
+    libnl \
+    libutils
+LOCAL_WHOLE_STATIC_LIBRARIES := $(LIB_WIFI_HAL)
+include $(BUILD_SHARED_LIBRARY)
+
+endif
diff --git a/libwifi_hal/wifi_hal_fallback.cpp b/libwifi_hal/wifi_hal_fallback.cpp
new file mode 100644
index 000000000..64259a11d
--- /dev/null
+++ b/libwifi_hal/wifi_hal_fallback.cpp
@@ -0,0 +1,21 @@
+/*
+ * Copyright 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 "hardware_legacy/wifi_hal.h"
+
+wifi_error init_wifi_vendor_hal_func_table(wifi_hal_fn *fn) {
+    return WIFI_ERROR_NOT_SUPPORTED;
+}
diff --git a/service/Android.mk b/service/Android.mk
index 9b3ed1d17..5c824c886 100644
--- a/service/Android.mk
+++ b/service/Android.mk
@@ -16,79 +16,39 @@ LOCAL_PATH := $(call my-dir)
 
 ifneq ($(TARGET_BUILD_PDK), true)
 
-# Make HAL stub library 1
+# This is the HAL stub library.  We initialize the HAL function table
+# with functions from here so that we have reasonable "unimplemented"
+# fallback behavior when a behavior isn't implemented by a vendor.
 # ============================================================
-
-include $(CLEAR_VARS)
-
-LOCAL_REQUIRED_MODULES :=
-
-LOCAL_CFLAGS += -Wall -Werror -Wextra -Wno-unused-parameter -Wno-unused-function \
-                -Wunused-variable -Winit-self -Wwrite-strings -Wshadow
-
-LOCAL_C_INCLUDES += \
-	external/libnl-headers \
-	$(call include-path-for, libhardware_legacy)/hardware_legacy
-
-LOCAL_SRC_FILES := \
-	lib/wifi_hal.cpp
-
-LOCAL_MODULE := libwifi-hal
-
-include $(BUILD_STATIC_LIBRARY)
-
-# Make HAL stub library 2
-# ============================================================
-
 include $(CLEAR_VARS)
-
-LOCAL_REQUIRED_MODULES :=
-
-LOCAL_CFLAGS += -Wall -Werror -Wextra -Wno-unused-parameter -Wno-unused-function \
-                -Wunused-variable -Winit-self -Wwrite-strings -Wshadow
-
-LOCAL_C_INCLUDES += \
-	$(LOCAL_PATH)/jni \
-	external/libnl-headers \
-	$(call include-path-for, libhardware_legacy)/hardware_legacy
-
-LOCAL_SRC_FILES := \
-	lib/wifi_hal_stub.cpp
-
 LOCAL_MODULE := libwifi-hal-stub
-
+LOCAL_CFLAGS := \
+    -Wall \
+    -Werror \
+    -Wextra \
+    -Wno-unused-parameter \
+    -Wno-unused-function \
+    -Wunused-variable \
+    -Winit-self \
+    -Wwrite-strings \
+    -Wshadow
+
+LOCAL_C_INCLUDES := \
+    $(LOCAL_PATH)/jni \
+    $(call include-path-for, libhardware_legacy)
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_C_INCLUDES)
+LOCAL_SRC_FILES := lib/wifi_hal_stub.cpp
 include $(BUILD_STATIC_LIBRARY)
 
-# set correct hal library path
-# ============================================================
-LIB_WIFI_HAL := libwifi-hal
-
-ifeq ($(BOARD_WLAN_DEVICE), bcmdhd)
-  LIB_WIFI_HAL := libwifi-hal-bcm
-else ifeq ($(BOARD_WLAN_DEVICE), qcwcn)
-  LIB_WIFI_HAL := libwifi-hal-qcom
-else ifeq ($(BOARD_WLAN_DEVICE), mrvl)
-  # this is commented because none of the nexus devices
-  # that sport Marvell's wifi have support for HAL
-  # LIB_WIFI_HAL := libwifi-hal-mrvl
-else ifeq ($(BOARD_WLAN_DEVICE), MediaTek)
-  # support MTK WIFI HAL
-  LIB_WIFI_HAL := libwifi-hal-mt66xx
-endif
-
 # Make the JNI part
 # ============================================================
 include $(CLEAR_VARS)
 
-LOCAL_REQUIRED_MODULES := libwifi-system
-
 LOCAL_CFLAGS += -Wall -Werror -Wextra -Wno-unused-parameter -Wno-unused-function \
                 -Wunused-variable -Winit-self -Wwrite-strings -Wshadow
 
 LOCAL_C_INCLUDES += \
 	$(JNI_H_INCLUDE) \
-	$(call include-path-for, libhardware)/hardware \
-	$(call include-path-for, libhardware_legacy)/hardware_legacy \
 	libcore/include
 
 LOCAL_SHARED_LIBRARIES += \
@@ -96,13 +56,11 @@ LOCAL_SHARED_LIBRARIES += \
 	libnativehelper \
 	libcutils \
 	libutils \
-	libhardware \
-	libnl \
 	libdl \
+	libwifi-hal \
 	libwifi-system
 
-LOCAL_STATIC_LIBRARIES += libwifi-hal-stub
-LOCAL_STATIC_LIBRARIES += $(LIB_WIFI_HAL)
+LOCAL_STATIC_LIBRARIES := libwifi-hal-stub
 
 LOCAL_SRC_FILES := \
 	jni/com_android_server_wifi_WifiNative.cpp \
diff --git a/service/jni/com_android_server_wifi_WifiNative.cpp b/service/jni/com_android_server_wifi_WifiNative.cpp
index 7fd7303f9..f4fadde84 100644
--- a/service/jni/com_android_server_wifi_WifiNative.cpp
+++ b/service/jni/com_android_server_wifi_WifiNative.cpp
@@ -35,9 +35,9 @@
 #include <vector>
 
 #include "wifi_system/wifi.h"
-#include "wifi_hal.h"
+#include "hardware_legacy/wifi_hal.h"
 #include "jni_helper.h"
-#include "rtt.h"
+#include "hardware_legacy/rtt.h"
 #include "wifi_hal_stub.h"
 #define REPLY_BUF_SIZE (4096 + 1)         // wpa_supplicant's maximum size + 1 for nul
 #define EVENT_BUF_SIZE 2048
diff --git a/service/jni/com_android_server_wifi_nan_WifiNanNative.cpp b/service/jni/com_android_server_wifi_nan_WifiNanNative.cpp
index d8dce6b1e..fce4e93a7 100644
--- a/service/jni/com_android_server_wifi_nan_WifiNanNative.cpp
+++ b/service/jni/com_android_server_wifi_nan_WifiNanNative.cpp
@@ -28,7 +28,7 @@
 #include <sys/socket.h>
 #include <linux/if.h>
 #include "wifi_system/wifi.h"
-#include "wifi_hal.h"
+#include "hardware_legacy/wifi_hal.h"
 #include "jni_helper.h"
 
 namespace android {
diff --git a/service/jni/jni_helper.cpp b/service/jni/jni_helper.cpp
index eb4f80cf9..f80b2bd7a 100644
--- a/service/jni/jni_helper.cpp
+++ b/service/jni/jni_helper.cpp
@@ -24,7 +24,7 @@
 #include <utils/String16.h>
 
 #include "wifi_system/wifi.h"
-#include "wifi_hal.h"
+#include "hardware_legacy/wifi_hal.h"
 #include "jni_helper.h"
 
 namespace android {
diff --git a/service/jni/wifi_hal_stub.h b/service/jni/wifi_hal_stub.h
index d49aeb707..e853c0ce4 100644
--- a/service/jni/wifi_hal_stub.h
+++ b/service/jni/wifi_hal_stub.h
@@ -22,7 +22,7 @@ extern "C"
 {
 #endif
 
-#include "wifi_hal.h"
+#include "hardware_legacy/wifi_hal.h"
 
 int init_wifi_stub_hal_func_table(wifi_hal_fn *hal_fn);
 
diff --git a/service/lib/wifi_hal.cpp b/service/lib/wifi_hal.cpp
deleted file mode 100644
index 25bb373d9..000000000
--- a/service/lib/wifi_hal.cpp
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <stdint.h>
-#include "wifi_hal.h"
-
-wifi_error init_wifi_vendor_hal_func_table(wifi_hal_fn *fn) {
-    return WIFI_ERROR_NOT_SUPPORTED;
-}
diff --git a/service/lib/wifi_hal_stub.cpp b/service/lib/wifi_hal_stub.cpp
index f4165a066..f4c263fd9 100644
--- a/service/lib/wifi_hal_stub.cpp
+++ b/service/lib/wifi_hal_stub.cpp
@@ -15,7 +15,8 @@
  */
 
 #include <stdint.h>
-#include "wifi_hal.h"
+
+#include "hardware_legacy/wifi_hal.h"
 #include "wifi_hal_stub.h"
 
 wifi_error wifi_initialize_stub(wifi_handle *handle) {
diff --git a/tests/wifitests/Android.mk b/tests/wifitests/Android.mk
index e13422136..71e28a22d 100644
--- a/tests/wifitests/Android.mk
+++ b/tests/wifitests/Android.mk
@@ -28,7 +28,7 @@ LOCAL_C_INCLUDES += \
 	$(JNI_H_INCLUDE) \
 	$(LOCAL_PATH)/../../service/jni \
 	$(call include-path-for, libhardware)/hardware \
-	$(call include-path-for, libhardware_legacy)/hardware_legacy \
+	$(call include-path-for, libhardware_legacy) \
 	packages/apps/Test/connectivity/sl4n/rapidjson/include \
 	libcore/include
 
@@ -42,7 +42,6 @@ endif
 
 LOCAL_MODULE := libwifi-hal-mock
 
-LOCAL_STATIC_LIBRARIES += libwifi-hal
 LOCAL_SHARED_LIBRARIES += \
 	libnativehelper \
 	libcutils \
@@ -143,6 +142,7 @@ LOCAL_JNI_SHARED_LIBRARIES := \
 	libstagefright_foundation \
 	libstdc++ \
 	libsync \
+	libwifi-hal \
 	libwifi-system \
 	libui \
 	libunwind \
diff --git a/tests/wifitests/jni/wifi_hal_mock.cpp b/tests/wifitests/jni/wifi_hal_mock.cpp
index 9c0b2158e..96c0dd540 100644
--- a/tests/wifitests/jni/wifi_hal_mock.cpp
+++ b/tests/wifitests/jni/wifi_hal_mock.cpp
@@ -26,7 +26,7 @@
 #include <sys/socket.h>
 #include <linux/if.h>
 #include "wifi_system/wifi.h"
-#include "wifi_hal.h"
+#include "hardware_legacy/wifi_hal.h"
 #include "jni_helper.h"
 #include "wifi_hal_mock.h"
 #include <sstream>
diff --git a/tests/wifitests/jni/wifi_hal_mock.h b/tests/wifitests/jni/wifi_hal_mock.h
index a5263934b..f31612244 100644
--- a/tests/wifitests/jni/wifi_hal_mock.h
+++ b/tests/wifitests/jni/wifi_hal_mock.h
@@ -17,7 +17,7 @@
 #ifndef __WIFI_HAL_MOCK_H__
 #define __WIFI_HAL_MOCK_H__
 
-#include "wifi_hal.h"
+#include "hardware_legacy/wifi_hal.h"
 
 #include <rapidjson/document.h>
 #include <rapidjson/stringbuffer.h>
diff --git a/tests/wifitests/jni/wifi_nan_hal_mock.cpp b/tests/wifitests/jni/wifi_nan_hal_mock.cpp
index ae1fea404..01da519e5 100644
--- a/tests/wifitests/jni/wifi_nan_hal_mock.cpp
+++ b/tests/wifitests/jni/wifi_nan_hal_mock.cpp
@@ -26,7 +26,7 @@
 #include <sys/socket.h>
 #include <linux/if.h>
 #include "wifi_system/wifi.h"
-#include "wifi_hal.h"
+#include "hardware_legacy/wifi_hal.h"
 #include "jni_helper.h"
 #include "wifi_hal_mock.h"
 #include <sstream>