wifi适配

# RTL8723BU wifi模块适配 ##linux驱动添加 安卓下使能外设驱动都需要先适配好linux下驱动，所以首先来编译linux驱动模块 1. 拷贝官方驱动（github的资源文件目录下下载）到lichee的linux驱动目录下 ~~~ zp@ubuntu:~/develop/a13_android4.1_v1.2/lichee$ ls linux-3.0/drivers/net/wireless/rtl8723bu/ clean core hal ifcfg-wlan0 include Kconfig Makefile os_dep platform runwpa wlan0dhcp ~~~ 2. 配置驱动Makefile以及Kconfig，然后在menuconfig里选中刚加入的驱动 `CONFIG_PLATFORM_ARM_SUNxI = y` `obj-$(CONFIG_RTL8723BU) += rtl8723bu/` `source "drivers/net/wireless/rtl8723bu/Kconfig"` ` Realtek 8723B USB WiFi` 3. 重新编译lichee，获得内核模块 `./build.sh -p a13_nuclear -k 3.0` ~~~ zp@ubuntu:~/develop/a13_android4.1_v1.2/lichee$ ls out/android/lib/modules/3.0.8+/87* out/android/lib/modules/3.0.8+/8723bu.ko ~~~ 4. 修改wifi驱动，隐藏过多调试信息 前面这样生成的ko带有很多调试信息输出，以至于开启wifi模块时太慢，导致打开wifi超时，所以需要隐藏多余的信息。 编辑linux-3.0/drivers/net/wireless/rtl8723bu/include/autoconf.h，去掉DEBUG的相关宏定义。 ##安卓配置文件 1. 修改板级配置文件device/softwinner/nuclear-evb/BoardConfig.mk ~~~ BOARD_WIFI_VENDOR := realtek ifeq ($(BOARD_WIFI_VENDOR), realtek) WPA_SUPPLICANT_VERSION := VER_0_8_X BOARD_WPA_SUPPLICANT_DRIVER := NL80211 BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_rtl BOARD_HOSTAPD_DRIVER := NL80211 BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_rtl SW_BOARD_USR_WIFI := rtl8723bu BOARD_WLAN_DEVICE := rtl8723bu endif ~~~ 2. 修改init启动脚本init.sun5i.rc ~~~ # 1.1 realtek wifi sta service service wpa_supplicant /system/bin/wpa_supplicant -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf -e/data/misc/wifi/entropy.bin class main socket wpa_wlan0 dgram 660 wifi wifi disabled oneshot # 1.2 realtek wifi sta p2p concurrent service service p2p_supplicant /system/bin/wpa_supplicant \ -ip2p0 -Dnl80211 -c/data/misc/wifi/p2p_supplicant.conf -e/data/misc/wifi/entropy.bin -N \ -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf class main socket wpa_wlan0 dgram 660 wifi wifi disabled oneshot ~~~ 3.修改安卓板级mk文件nuclear_evb.mk（蓝牙需要，wifi不用改） 4. 修改安卓hardware相关代码hardware/libhardware_legacy/wifi/wifi.c ~~~ #elif defined RTL_8723BU_WIFI_USED /* rtl8723bu usb wifi */ #ifndef WIFI_DRIVER_MODULE_PATH #define WIFI_DRIVER_MODULE_PATH "/system/vendor/modules/8723bu.ko" #endif #ifndef WIFI_DRIVER_MODULE_NAME #define WIFI_DRIVER_MODULE_NAME "8723bu" #endif #ifndef WIFI_DRIVER_MODULE_ARG #define WIFI_DRIVER_MODULE_ARG "ifname=wlan0 if2name=p2p0" ~~~ 5. wifi的安卓mk修改 ~~~ hardware/libhardware_legacy/wifi/Android.mk ifeq ($(SW_BOARD_USR_WIFI), rtl8723bu) LOCAL_CFLAGS += -DRTL_8723BU_WIFI_USED LOCAL_CFLAGS += -DRTL_WIFI_VENDOR endif ~~~ 6. wpa的安卓mk修改 ~~~ external/wpa_supplicant_8/wpa_supplicant/Android.mk ifeq ($(SW_BOARD_USR_WIFI), rtl8188eu) L_CFLAGS += -DCONFIG_WFD endif ~~~ 5. 重新编译安卓 实际需要更新的就只有libhardware_legacy.so和8723bu.ko，当然也可以打包整个镜像重新烧写。 以局部更新为例，挂载tf卡的第7分区，拷贝so到lib/libhardware_legacy.so 拷贝ko到vendor/modules sync后启动即可