RTL8188EUS Anaroid M Porting

硬件imx6q
系統:android M

1.參考Quick Start Guide for Driver Compilation and Installation集成驅動到內核裏

1)把driver源碼集成到drivers/net/wireless中
kernel_imx/drivers/net/wireless/rtl8188eus
2)編譯內核生成8188eu.ko

-- a/kernel_imx/drivers/net/wireless/Kconfig
+++ b/kernel_imx/drivers/net/wireless/Kconfig
@@ -215,6 +215,7 @@ config USB_NET_RNDIS_WLAN
          If you choose to build a module, it'll be called rndis_wlan.

 source "drivers/net/wireless/rtl818x/Kconfig"
+source "drivers/net/wireless/rtl8188eus/Kconfig"
--- a/kernel_imx/drivers/net/wireless/Makefile
+++ b/kernel_imx/drivers/net/wireless/Makefile
@@ -1,7 +1,7 @@
 #
 # Makefile for the Linux Wireless network device drivers.
 #
-
+obj-$(CONFIG_RTL8188EU) += rtl8188eus/
--- a/kernel_imx/drivers/net/wireless/rtl8188eus/Kconfig
+++ b/kernel_imx/drivers/net/wireless/rtl8188eus/Kconfig
@@ -1,5 +1,5 @@
 config RTL8188EU
-       tristate "Realtek 8188E USB WiFi"
+       tristate "Realtek 8188EUS USB WiFi"

--- a/kernel_imx/drivers/net/wireless/rtl8188eus/Makefile
+++ b/kernel_imx/drivers/net/wireless/rtl8188eus/Makefile
@@ -14,7 +14,9 @@ EXTRA_CFLAGS += -Wno-unused-parameter
 EXTRA_CFLAGS += -Wno-unused-function
 EXTRA_CFLAGS += -Wno-unused
 #EXTRA_CFLAGS += -Wno-uninitialized
-#EXTRA_CFLAGS += -Wno-error=date-time  # Fix compile error on gcc 4.9 and later
+EXTRA_CFLAGS += -Wno-error=date-time   # Fix compile error on gcc 4.9 and later
+EXTRA_CFLAGS += -Wno-error=implicit-function-declaration
+EXTRA_CFLAGS += -fno-pic

 EXTRA_CFLAGS += -I$(src)/include
 EXTRA_CFLAGS += -I$(src)/hal/phydm
@@ -75,7 +77,7 @@ CONFIG_RTW_SDIO_PM_KEEP_POWER = y
 ###################### MP HW TX MODE FOR VHT #######################
 CONFIG_MP_VHT_HW_TX_MODE = n
 ###################### Platform Related #######################
-CONFIG_PLATFORM_I386_PC = y
+CONFIG_PLATFORM_I386_PC = n
 CONFIG_PLATFORM_ANDROID_X86 = n
 CONFIG_PLATFORM_ANDROID_INTEL_X86 = n
 CONFIG_PLATFORM_JB_X86 = n
@@ -126,6 +128,7 @@ CONFIG_PLATFORM_MOZART = n
 CONFIG_PLATFORM_RTK119X = n
 CONFIG_PLATFORM_NOVATEK_NT72668 = n
 CONFIG_PLATFORM_HISILICON = n
+CONFIG_PLATFORM_ARM_IMX6QD = y
 ###############################################################

 CONFIG_DRVEXT_MODULE = n
@@ -921,6 +924,17 @@ MODDESTDIR := /lib/modules/$(KVER)/kernel/drivers/net/wireless/
 INSTALL_PREFIX :=
 endif

+ifeq ($(CONFIG_PLATFORM_ARM_IMX6QD), y)
+EXTRA_CFLAGS += -DCONFIG_LITTLE_ENDIAN -DCONFIG_PLATFORM_ANDROID
+EXTRA_CFLAGS += -DCONFIG_CONCURRENT_MODE
+EXTRA_CFLAGS += -DCONFIG_IOCTL_CFG80211 -DRTW_USE_CFG80211_STA_EVENT
+EXTRA_CFLAGS += -DCONFIG_RADIO_WORK
+ARCH := arm
+CROSS_COMPILE :=/home/freescale/myandroid/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-
+KSRC :=/home/freescale/myandroid/kernel_imx
+
+MODULE_NAME := 8188eu
+endif


把生成的ko放在文件系統中
cp kernel_imx/drivers/net/wireless/rtl8188eus/8188eu.ko device/fsl/common/wifi/

device/fsl/imx6/imx6.mk
PRODUCT_COPY_FILES +=   \
device/fsl/common/wifi/8188eu.ko:system/lib/8188eu.ko \

2.修改frescale imx6 的wpa_supplicant_8

編譯後生成:system/bin/wpa_supplicant
system/bin/wpa_cli

--- a/external/wpa_supplicant_8/hostapd/Android.mk
+++ b/external/wpa_supplicant_8/hostapd/Android.mk
@@ -30,6 +30,9 @@ L_CFLAGS += -Wno-unused-parameter
 # Set Android extended P2P functionality
 L_CFLAGS += -DANDROID_P2P

+ifeq ($(BOARD_HOSTAPD_PRIVATE_LIB),)
+L_CFLAGS += -DANDROID_LIB_STUB
+endif

 # Use Android specific directory for control interface sockets
 L_CFLAGS += -DCONFIG_CTRL_IFACE_CLIENT_DIR=\"/data/misc/wifi/sockets\"
@@ -973,7 +976,9 @@ LOCAL_MODULE_TAGS := optional
 ifdef CONFIG_DRIVER_CUSTOM
 LOCAL_STATIC_LIBRARIES := libCustomWifi
 endif
-LOCAL_STATIC_LIBRARIES += lib_driver_cmd_bcmdhd
+ifneq ($(BOARD_HOSTAPD_PRIVATE_LIB),)
+LOCAL_STATIC_LIBRARIES += $(BOARD_HOSTAPD_PRIVATE_LIB)
+endif

--- a/external/wpa_supplicant_8/wpa_supplicant/Android.mk
+++ b/external/wpa_supplicant_8/wpa_supplicant/Android.mk
@@ -1558,9 +1558,8 @@ LOCAL_MODULE := wpa_supplicant
 ifdef CONFIG_DRIVER_CUSTOM
 LOCAL_STATIC_LIBRARIES := libCustomWifi
 endif
-LOCAL_STATIC_LIBRARIES += lib_driver_cmd_bcmdhd //這裏被寫死了如果不改會編譯出錯(坑)
-ifneq ($(BOARD_WPA_SUPPLICANT_PRIVATE_LIB_BCM),)
-LOCAL_STATIC_LIBRARIES += $(BOARD_WPA_SUPPLICANT_PRIVATE_LIB_BCM)
+ifneq ($(BOARD_WPA_SUPPLICANT_PRIVATE_LIB),)
+LOCAL_STATIC_LIBRARIES += $(BOARD_WPA_SUPPLICANT_PRIVATE_LIB)
 endif

3.把產家提供的realtek/wlan放在android 源碼的hardware目錄下

編譯的條件是BOARD_WIFI_VENDOR := realtek
WPA_SUPPLICANT_VERSION := VER_0_8_X
編譯後會生成lib_driver_cmd_rtl.a　靜態庫
lib_driver_cmd_rtl.a

4.BoardConfig.mk配置加載哪一項wifi模組

device/fsl/sabresd_6dq/BoardConfig.mk

#Wifi Configuration
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
BOARD_USE_WIFI := rtl8188eu
BOARD_WLAN_DEVICE := rtl8188eu 
WIFI_DRIVER_FW_PATH_STA := "STA"
WIFI_DRIVER_FW_PATH_AP := "AP"
WIFI_DRIVER_FW_PATH_P2P := "P2P"
WIFI_DRIVER_FW_PATH_PARAM := "/dev/null"

WIFI_DRIVER_MODULE_NAME := "8188eu"
WIFI_DRIVER_MODULE_PATH := "/system/lib/8188eu.ko"
WIFI_DRIVER_MODULE_ARG  := "ifname=wlan0 if2name=p2p0"

WIFI_DRIVER_FW_PATH_STA   := "STA"
WIFI_DRIVER_FW_PATH_AP    := "AP"
WIFI_DRIVER_FW_PATH_P2P   := "P2P"
WIFI_DRIVER_FW_PATH_PARAM := "/dev/null"
endif

5.init.rc

service p2p_supplicant /system/bin/wpa_supplicant \
    -ip2p0 -Dnl80211 -c/data/misc/wifi/p2p_supplicant.conf \
    -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf \
    -I/system/etc/wifi/wpa_supplicant_overlay.conf \
    -O/data/misc/wifi/sockets -puse_p2p_group_interface=1 \
    -e/data/misc/wifi/entropy.bin -g@android:wpa_wlan0
    class main
    socket wpa_wlan0 dgram 660 wifi wifi
    disabled
    oneshot


service wpa_supplicant /system/bin/wpa_supplicant \
    -iwlan0 -Dnl80211 -c/data/misc/wifi/wpa_supplicant.conf \
    -I/system/etc/wifi/wpa_supplicant_overlay.conf \
    -puse_p2p_group_interface=1p2p_device=1 \
    -g/data/misc/wifi/sockets/p2p0 \
    -O/data/misc/wifi/sockets -dd \
    -e/data/misc/wifi/entropy.bin -g@android:wpa_wlan0
    class main
    socket wpa_wlan0 dgram 660 wifi wifi
    disabled
    oneshot

6.wifi.c

Ａndroid M可以不用修改,Android O修改insmod增加權限

--- a/hardware/libhardware_legacy/wifi/wifi.c
+++ b/hardware/libhardware_legacy/wifi/wifi.c
@@ -23,7 +23,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 #include <poll.h>
-
+#include <sys/syscall.h>
 #include "hardware_legacy/wifi.h"
 #ifdef LIBWPA_CLIENT_EXISTS
 #include "libwpa_client/wpa_ctrl.h"
@@ -73,6 +73,9 @@ static int exit_sockets[2];
 static char primary_iface[PROPERTY_VALUE_MAX];
 // TODO: use new ANDROID_SOCKET mechanism, once support for multiple
 // sockets is in
     "ifname=wlan0 if2name=p2p0"

 #ifndef WIFI_DRIVER_MODULE_ARG
 #define WIFI_DRIVER_MODULE_ARG          ""
@@ -132,21 +135,21 @@ static char supplicant_name[PROPERTY_VALUE_MAX];
 /* Is either SUPP_PROP_NAME or P2P_PROP_NAME */
 static char supplicant_prop_name[PROPERTY_KEY_MAX];

-static int insmod(const char *filename, const char *args)
+int insmod(const char *filename, const char *args)
 {
-    void *module;
-    unsigned int size;
-    int ret;
-
-    module = load_file(filename, &size);
-    if (!module)
+     /* O_NOFOLLOW is removed as wlan.ko is symlink pointing to
+        the vendor specfic file which is in readonly location */
+     int fd = open(filename, O_RDONLY | O_CLOEXEC);
+     if (fd == -1) {
+        ALOGD("insmod: open(\"%s\") failed: %s", filename, strerror(errno));
         return -1;
-
-    ret = init_module(module, size, args);
-
-    free(module);
-
-    return ret;
+     }
+     int rc = syscall(__NR_finit_module, fd, args, 0);
+     if (rc == -1) {
+       ALOGD("finit_module for \"%s\" failed: %s", filename, strerror(errno));
+     }
+     close(fd);
+     return rc;
 }

7.權限問題

針對Android N

10-01 11:49:28.170   541   541 I WifiStateMachin: type=1400 audit(0.0:18): avc: denied { sys_module } for capability=16 scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=capability permissive=1
10-01 11:49:28.170   541   541 I WifiStateMachin: type=1400 audit(0.0:19): avc: denied { module_load } for scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=system permissive=1
type=1400 audit(970404009.360:17): avc: denied { sys_module } for pid=543 comm="WifiStateMachin" capability=16 scontext=u:r:system_server:s0 tcontext=u:r:system_server:s0 tclass=capability permissive=1

init: Starting service 'p2p_supplicant'...
type=1400 audit(1980266916.550:19): avc: denied { open } for pid=1258 comm="wpa_supplicant" path="/data/misc/wifi/entropy.bin" dev="mmcblk0p4" ino=1253749 scontext=u:r:wpa:s0 tcontext=u:object_r:system_data_file:s0 tclass=file permissive=1
type=1400 audit(1980266916.560:20): avc: denied { write } for pid=1258 comm="wpa_supplicant" name="entropy.bin" dev="mmcblk0p4" ino=1253749 scontext=u:r:wpa:s0 tcontext=u:object_r:system_data_file:s0 tclass=file permissive=1
init: Service 'p2p_supplicant' (pid 1258) exited with status 255

fix:
--- a/device/fsl/imx6/sepolicy/device.te
+++ b/device/fsl/imx6/sepolicy/device.te
@@ -1,2 +1,3 @@
 type caam_device, dev_type;
 type pxp_device, dev_type;
+type wlan_device, dev_type;

--- a/device/fsl/imx6/sepolicy/system_server.te
+++ b/device/fsl/imx6/sepolicy/system_server.te
@@ -4,3 +4,7 @@ allow system_server system_data_file:file {relabelto rw_file_perms};
 allow system_server system_data_file:dir {relabelto rw_dir_perms};
 allow system_server kernel:system { syslog_read };
 allow system_server debugfs_tracing:file { write };
+allow system_server system_file:system module_load;
+allow system_server kernel:key search;
+allow system_server wlan_device:chr_file rw_file_perms;
+allow system_server self:capability sys_module;

--- a/system/sepolicy/domain.te
+++ b/system/sepolicy/domain.te
@@ -468,12 +468,12 @@ neverallow {
   -system_server
   -system_app
   -init
+  -wpa
   -installd # for relabelfrom and unlink, check for this in explicit neverallow
 } system_data_file:file no_w_file_perms;


 device/fsl/imx6/sepolicy/wpa.te
allow wpa system_data_file:file {open write create setattr rename unlink};
allow wpa system_data_file:dir {create setattr write add_name remove_name};
allow wpa system_data_file:sock_file {create setattr write};

8.wifi 顯示x號無法上網

--- a/frameworks/base/services/core/java/com/android/server/connectivity/NetworkMonitor.java
+++ b/frameworks/base/services/core/java/com/android/server/connectivity/NetworkMonitor.java
@@ -85,9 +85,9 @@ public class NetworkMonitor extends StateMachine {
     // Default configuration values for captive portal detection probes.
     // TODO: append a random length parameter to the default HTTPS url.
     // TODO: randomize browser version ids in the default User-Agent String.
-    private static final String DEFAULT_HTTPS_URL     = "https://www.google.com/generate_204";
+    private static final String DEFAULT_HTTPS_URL     = "https://captive.v2ex.co/generate_204";
     private static final String DEFAULT_HTTP_URL      =
-            "http://connectivitycheck.gstatic.com/generate_204";
+            "http://captive.v2ex.co/generate_204";


或者調試的時候用
adb shell settings put global captive_portal_detection_enabled 0關閉wfif檢測然後重啓

９.內核驅動去掉打印調試信息

--- a/kernel_imx/drivers/net/wireless/rtl8188eus/include/autoconf.h
+++ b/kernel_imx/drivers/net/wireless/rtl8188eus/include/autoconf.h
@@ -318,7 +318,7 @@
 /*
  * Debug Related Config
  */
-#define DBG    1
+#define DBG    0

--- a/kernel_imx/drivers/net/wireless/rtl8188eus/include/rtw_debug.h
+++ b/kernel_imx/drivers/net/wireless/rtl8188eus/include/rtw_debug.h
@@ -183,8 +183,8 @@ extern void rtl871x_cedbg(const char *fmt, ...);
        #define _dbgdump rtl871x_cedbg
        #define _seqdump(sel, fmt, arg...) _dbgdump(fmt, ##arg)
 #elif defined PLATFORM_LINUX
-       #define _dbgdump printk
-       #define _seqdump seq_printf
+       #define _dbgdump //printk
+       #define _seqdump //seq_printf

RTL8188EUS Anaroid M Porting

1.參考Quick Start Guide for Driver Compilation and Installation集成驅動到內核裏

2.修改frescale imx6 的wpa_supplicant_8

3.把產家提供的realtek/wlan放在android 源碼的hardware目錄下

4.BoardConfig.mk配置加載哪一項wifi模組

5.init.rc

6.wifi.c

7.權限問題

8.wifi 顯示x號無法上網

９.內核驅動去掉打印調試信息

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