vim kernel_imx/arch/arm/configs/imx6s_{yourdevice}_android_defconfig
CONFIG_CFG80211=y
CONFIG_MAC80211_MESH=y
CONFIG_MAC80211=y
CONFIG_HOSTAP=y
CONFIG_RTL8192CU=y
CONFIG_RTLWIFI=y
CONFIG_RTL8192C_COMMON=y
#CONFIG_RTL8723AS=m
CONFIG_USB_USBNET=y
CONFIG_NET_RADIO=y
vim device/fsl/{yourdevice}/BoardConfig.mk
BOARD_WIFI_VENDOR := realtek
WPA_SUPPLICANT_VERSION := VER_0_8_X
CONFIG_DRIVER_NL80211 := true
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
BOARD_WLAN_DEVICE := rtl8192cu
WIFI_DRIVER_MODULE_NAME := "wlan0"
WIFI_DRIVER_MODULE_PATH := ""
WIFI_DRIVER_MODULE_ARG := ""
WIFI_FIRMWARE_LOADER := ""
WIFI_DRIVER_FW_PATH_STA := ""
WIFI_DRIVER_FW_PATH_AP := ""
WIFI_DRIVER_FW_PATH_P2P := ""
WIFI_DRIVER_FW_PATH_PARAM := ""
CONFIG_CFG80211=y
CONFIG_NL80211_TESTMODE=y
CONFIG_CFG80211_DEFAULT_PS=y
CONFIG_CFG80211_WEXT=y
CONFIG_MAC80211=y
CONFIG_HOSTAP=y
CONFIG_RTL8192CU=m
and found that those are missing
# CONFIG_USB_USBNET is not set
# CONFIG_NET_RADIO is not set
#define CONFIG_IOCTL_CFG80211 1
#ifdef CONFIG_IOCTL_CFG80211
#define RTW_USE_CFG80211_STA_EVENT /* Indecate new sta asoc through cfg80211_new_sta */
//#define CONFIG_CFG80211_FORCE_COMPATIBLE_2_6_37_UNDER
#define CONFIG_DEBUG_CFG80211 1
vim out/target/product/{yourboard}/root/init.rc
or/and (rebuild the whole system):
vim device/fsl/imx6/imx6.mk
mkdir /system/etc/wifi 0770 wifi wifi
chmod 0770 /system/etc/wifi
chmod 0660 /system/etc/wifi/wpa_supplicant.conf
chown wifi wifi /system/etc/wifi/wpa_supplicant.conf
#wpa_supplicant control socket for android wifi.c (android private socket)
mkdir /data/misc/wifi 0770 wifi wifi
mkdir /data/misc/wifi/sockets 0770 wifi wifi
chmod 0770 /data/misc/wifi
chmod 0660 /data/misc/wifi/wpa_supplicant.conf
chown wifi wifi /data/misc/wifi
chown wifi wifi /data/misc/wifi/wpa_supplicant.conf
setprop wifi.interface wlan0
setprop wlan.driver.status "ok"
#setprop wifi.ap.interface wlan0
#and also remove this lines:
# mkdir /data/system/wpa_supplicant 0771 wifi wifi
# chmod 0771 /data/system/wpa_supplicant
# symlink /data/misc/wifi/wpa_supplicant /data/system/wpa_supplicant
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vi /etc/wifi/ wpa_supplicant.conf ctrl_interface=wlan0（android标准） 改为
ctrl_interface=DIR=/data/system/wpa_supplicant GROUP=wifi （Unix标准）
问题三：不能启动supplicant。
提示： E/WifiStateMachine(442): Failed to start supplicant! 经调试，发现错误发生在：
android-4.2.2_r1\hardware\realtek\wlan\libhardware_legacy\wifi\wifi_realtek.c中 wifi_start_supplicant的
if (p2p_supported && wifi_ifname(SECONDARY) == NULL)
android-4.2.2_r1\external\wpa_supplicant_8\wpa_supplicant\Makefile中
#peng-- CFLAGS += -DANDROID -DANDROID_P2P -DREALTEK_WIFI_VENDOR -DCONFIG_ANDROID_4_2_PERSISTENT_IOT 改为
CFLAGS += -DANDROID -DREALTEK_WIFI_VENDOR -DCONFIG_ANDROID_4_2_PERSISTENT_IOT
改完后运行logcat提示
I/wpa_supplicant(1744): Successfully initialized wpa_supplicant ps 可以看到
1157 1010 0:00 wpa_supplicant -Dwext -iwlan0 -c/data/misc/wifi/wpa_supplicant
此时运行wpa_cli -p/data/system/wpa_supplicant -iwlan0 会进入
Interactive mode > status
wpa_state=DISCONNECTED address=08:57:00:98:6b:31
<3>CTRL-EVENT-STATE-CHANGE id=-1 state=0 BSSID=00:00:00:00:00:00 SSID= > scan OK
<3>CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:00:00:00:00:00 SSID= > [ 71.550000] ==> rtl8188e_iol_efuse_patch [ 71.825000] RTL871X: nolinked power save leave <3>CTRL-EVENT-SCAN-RESULTS <3>WPS-AP-AVAILABLE
<3>CTRL-EVENT-STATE-CHANGE id=-1 state=2 BSSID=00:00:00:00:00:00 SSID= > scan_results
bssid / frequency / signal level / flags / ssid
20:dc:e6:b7:74:ec 2437 -63 [WPA2-PSK-CCMP][WPS][ESS] uthandwriter
14:75:90:ae:ed:bc 2412 -71
[WPA-PSK-CCMP][WPA2-PSK-CCMP][WPS][ESS] UCF-TESTP
04:da:d2:75:f4:10 2412 -71 [WPA2-PSK-CCMP][ESS] 7F-LAN 04:da:d2:75:fc:70 2412 -72 [WPA2-PSK-CCMP][ESS] 7F-LAN bc:f6:85:9f:3a:da 2462 -72
[WPA-PSK-TKIP+CCMP][WPA2-PSK-TKIP+CCMP][ESS] zlghserver
28:e3:47:ad:b4:10 2457 -83 [WPA2-PSK-CCMP][ESS] 360\xe5\x85\x8d\xe8\xb4\xb9WiFi-XG
1c:fa:68:cd:50:02 2457 -45 [WPS][ESS] HELLO_TL-WN725N 14:75:90:20:0a:8a 2437 -73 [ESS] maize
> add_network 0
> set_network 0 ssid "HELLO_TL-WN725N" OK
> set_network 0 key_mgmt NONE
Or //set_network 0 key_mgmt WPA-PSK //set_network 0 psk '"12345678"' OK
> select_network 0 OK
<3>CTRL-EVENT-STATE-CHANGE id=0 state=3 BSSID=00:00:00:00:00:00 SSID=HELLO_TL-WN725N
> <3>CTRL-EVENT-SCAN-RESULTS <3>WPS-AP-AVAILABLE
> [ 336.215000] RTL871X: set ssid [HELLO_TL-WN725N] fw_state=0x00000008 [ 336.215000] RTL871X: set bssid:1c:fa:68:cd:50:02 [ 336.225000] RTL871X: start auth
[ 336.230000] RTL871X: auth success, start assoc [ 336.230000] RTL871X: assoc success
[ 336.230000] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 336.240000] UpdateHalRAMask8188EUsb => mac_id:0, networkType:0x0b, mask:0x000fffff
[ 336.240000] ==> rssi_level:0, rate_bitmap:0x000ff005
<3>Trying to associate with 1c:fa:68:cd:50:02 (SSID='HELLO_TL-WN725N' freq=2457 MHz)
<3>CTRL-EVENT-STATE-CHANGE id=0 state=5 BSSID=00:00:00:00:00:00 SSID=HELLO_TL-WN725N
<3>CTRL-EVENT-STATE-CHANGE id=0 state=6 BSSID=00:00:00:00:00:00 SSID=HELLO_TL-WN725N
<3>Associated with 1c:fa:68:cd:50:02
<3>CTRL-EVENT-CONNECTED - Connection to 1c:fa:68:cd:50:02 completed (auth) [id=0 id_str=]
<3>CTRL-EVENT-STATE-CHANGE id=0 state=9 BSSID=1c:fa:68:cd:50:02 SSID=HELLO_TL-WN725N >save
OK //测试会在data/misc/wifi/ 生成wpa_supplicant.conf >quit
UT@utcooker:/data # dhcpcd wlan0 …
dhcpcd[1358]: wlan0: NAK: from 192.168.1.1
dhcpcd[1358]: wlan0: sending IPv6 Router Solicitation dhcpcd[1358]: wlan0: broadcasting for a lease
dhcpcd[1358]: wlan0: offered 0.0.0.1 from 192.168.1.101
dhcpcd[1358]: wlan0: acknowledged 0.0.0.1 from 192.168.1.101 UT@utcooker:/data/misc/wifi # ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: seq=0 ttl=64 time=3.437 ms 64 bytes from 192.168.1.1: seq=1 ttl=64 time=1.351 ms
问题四：不能connect supplicant。
提示：Supplicant not running, cannot connect
E/WifiStateMachine(442): Failed to setup control channel, restart supplicant 此时ps能看到wpa_supplicant在运行 Wpa_cli操作配置网络正常。
Android界面Setting能打开但无法搜索Wifi。 经调试：
在android-4.2.2_r1\hardware\realtek\wlan\libhardware_legacy\wifi\wifi_realtek.c中
if (property_get(supplicant_prop_name, supp_status, NULL) && strcmp(supp_status, "running") == 0) { return 0;
}
检查得知wpa_supplicant服务正在运行 UT@utcooker:/data/misc/wifi #
getprop init.svc.wpa_supplicant Running 故修改：
static const char SUPPLICANT_NAME[] = "rtw_suppl"; /* without p2p concurrent */
static const char SUPP_PROP_NAME[] = "init.svc.%s"; 为：
static const char SUPPLICANT_NAME[] = "wpa_supplicant"; /* peng add */
static const char SUPP_PROP_NAME[] = "init.svc.wpa_supplicant";//peng add
此时能搜索wifi，有以下信息
01-01 13:03:08.305: D/WifiStateMachine(376): setWifiState: enabled
问题五：Setting不能连接wifi
提示：nl80211: Failed to set interface 6 to mode 2: -19
wpa_supplicant -Dnl80211 -iwlan0 -c/data/misc/wifi/wpa_suppplicant.conf -dd –B 此时使用nl80211方式启动wpa_supplicant时出现如下错误：
01-01 12:31:39.660: W/wpa_supplicant(2099): ======>UT:wpa_driver_nl80211_set_mode
01-01 12:31:39.660: D/wpa_supplicant(2099): nl80211: Set mode ifindex 6 iftype 2 (STATION)
01-01 12:31:39.660: W/wpa_supplicant(2099): nl80211: nl80211_cmd(drv, msg, 0, NL80211_CMD_SET_INTERFACE);
01-01 12:31:39.660: W/wpa_supplicant(2099): nl80211: send_and_recv_msgs ret=-19
01-01 12:31:39.660: D/wpa_supplicant(2099): nl80211: Failed to set interface 6 to mode 2: -19 (No such device)
01-01 12:31:39.660: W/wpa_supplicant(2099): ======>UT:if (res == -ENODEV) 01-01 12:31:39.660: W/wpa_supplicant(2099): UT:wpa_driver_nl80211_set_mode, res == -ENODEV
01-01 12:31:39.660: E/wpa_supplicant(2099): wlan0: Failed to initialize driver
interface01-01 12:31:39.660: D/wpa_supplicant(2099): nl80211: Failed to set interface 6 to mode 2: -19 (No such device)
程序执行到send_and_recv_msgs时出错，经测试发现调用的为wpa_supplicant自身的函数，而
hardware\realtek\wlan\wpa_supplicant_8_lib\driver_cmd_nl80211.c中也有 send_and_recv_msgs函数。
而在BoardConfigCommon.mk中，有
BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_rtl external/wpa_supplicant_ /wpa_supplicant/Android.mk中有:
LOCAL_STATIC_LIBRARIES += $(BOARD_WPA_SUPPLICANT_PRIVATE_LIB) 在/vendor/friendly-arm/exynos4412/prebuilt/Android.mk有： $(call
add-friendlyarm-file,$(BOARD_WPA_SUPPLICANT_PRIVATE_LIB).a,STATIC_LIBRARIES) 而\vendor\friendly-arm\exynos4412\prebuilt\目录下有lib_driver_cmd_fanl.a 原有BoardConfigCommon.mk中，有
BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_fanl 把vendor/friendly-arm/exynos4412/prebuilt/Android.mk有：
$(call
add-friendlyarm-file,$(BOARD_WPA_SUPPLICANT_PRIVATE_LIB).a,STATIC_LIBRARIES) 改为
$(call add-friendlyarm-file, lib_driver_cmd_fanl.a,STATIC_LIBRARIES) 此时重新生成编译烧写内核。就可以在Setting界面配置连接wifi。
正常使用，去除多余调试信息。
RTL8188EUS_new_4.1.7\driver\rtl8188EUS_rtl8189ES_linux_v4.1.7_9024.20130916\hal\OUTSRC\odm_debug.c ： pDM_Odm->DebugLevel = ODM_DBG_TRACE; 打印等级改为
pDM_Odm->DebugLevel = ODM_DBG_WARNING;
\RTL8188EUS_new_4.1.7\driver\rtl8188EUS_rtl8189ES_linux_v4.1.7_9024.20130916\autoconf_rtl8188e_usb_linux.h中
//peng-- #define DBG 1
//peng-- #define CONFIG_DEBUG
//peng-- #define CONFIG_DEBUG_RTL871X
wpa_supplicant –Dnl80211 -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf -dd -B
http://wenku.baidu.com/link?url=JNrKe143AjrgnWabVDZvvwpnyPQg0d9Cm1SM4_1Ll_D1biatKpR8RMGmdKPkL75DO7JOUlz1k8zwKx6129rj1HVGQUx_HlhEPF0-er0tEua
https://community.nxp.com/message/397950#397950