工作笔记分享---rt2870 usb wifi在mx53 android平台上的移植
rt2870 usb wifi在mx53 android平台上的移植
USB WIFI在linux平台下的移植教程网上很多，但是在android上的移植，完整的教程很少，移植这个驱动整整花了一个星期的时间，以下是这个星期下来详细的移植笔记。
一：编译wifi驱动源码，生成ko文件
由于在linux的根文件系统下存在/etc目录，而android的根目录下，/etc是从/system/etc下链接过来的，因此
需要修改wifi源码，让驱动从/system/etc下寻找配置文件。
寻找/etc/Wireless文件，找到如下文件存在，全修改为/system/etc/Wireless:
root@lqm:/opt/program/tools/RT3070_Linux_STA# grep -r '/mnt/etc' ./
./include/os/rt_drv.h:#define STA_PROFILE_PATH"/etc/Wireless/RT2870STA/RT2870STA.dat"
./include/os/rt_drv.h:#define CARD_INFO_PATH"/etc/Wireless/RT2870STA/RT2870STACard.dat"
./include/os/rt_drv.h:#define EEPROM_BIN_FILE_NAME "/etc/Wireless/RT2870STA/e2p.bin"
./include/os/rt_linux.h:#define STA_PROFILE_PATH"/etc/Wireless/RT2870STA/RT2870STA.dat"
./include/os/rt_linux.h:#define CARD_INFO_PATH"/etc/Wireless/RT2870STA/RT2870STACard.dat"
./include/os/rt_linux.h:#define EEPROM_BIN_FILE_NAME "/etc/Wireless/RT2870STA/e2p.bin"
./os/linux/Makefile.6:DAT_PATH = /etc/Wireless/RT$(CHIPSET_DAT)STA
./os/linux/Makefile.6:$(shell [ ! -f /etc/Wireless ] && mkdir /etc/Wireless)
二进制文件 ./os/linux/rt_profile.o 匹配
./os/linux/Makefile:DAT_PATH = /mnt/etc/Wireless/RT$(CHIPSET_DAT)STA
./os/linux/Makefile:$(shell [ ! -f /etc/Wireless ] && mkdir /etc/Wireless)
二进制文件 ./os/linux/rt3070sta.o 匹配
二进制文件 ./os/linux/rt3070sta.ko 匹配
./os/linux/Makefile.4:DAT_PATH = /etc/Wireless/RT$(CHIPSET_DAT)STA
./os/linux/Makefile.4:$(shell [ ! -f /etc/Wireless ] && mkdir /etc/Wireless)
二进制文件 ./common/rtmp_init_inf.o 匹配
./RT2870STACard.dat:00CARDID=/etc/Wireless/RT2870STA/RT2870STA1.dat
./RT2870STACard.dat:01CARDID=/etc/Wireless/RT2870STA/RT2870STA2.dat
./RT2870STACard.dat:02CARDID=/etc/Wireless/RT2870STA/RT2870STA3.dat
./RT2870STACard.dat:00MAC00:0E:2E:C3:D0:48=/etc/Wireless/RT2870STA/RT2870STA1.dat
./RT2870STACard.dat:01MAC00:40:F4:FF:AA:40=/etc/Wireless/RT2870STA/RT2870STA2.dat
./RT2870STACard.dat:02MAC00:0C:43:10:11:5C=/etc/Wireless/RT2870STA/RT2870STA3.dat
./RT2870STACard.dat:00CARDTYPEbgn=/etc/Wireless/RT2870STA/RT2870STA1.dat
./RT2870STACard.dat:01CARDTYPEbgn=/etc/Wireless/RT2870STA/RT2870STA2.dat
./RT2870STACard.dat:02CARDTYPEabgn=/etc/Wireless/RT2870STA/RT2870STA3.dat
root@lqm:/opt/program/tools/RT3070_Linux_STA#
二：修改init.rc文件
直接修改out/..../root下的init.rc文件：
# mkdir /data/misc/wifi 0770 wifi wifi #lqm changed property.
mkdir /data/misc/wifi 0771 wifi wifi
# chmod 0770 /data/misc/wifi
chmod 0771 /system/etc/wifi #lqm changed path
#chmod 0660 /data/misc/wifi/wpa_supplicant.conf #lqm changed path
chmod 0660 /system/etc/wifi/wpa_supplicant.conf
chown wifi wifi /system/etc/wifi/wpa_supplicant.conf #lqm added.
on boot
# basic network init
ifup lo
hostname localhost
domainname localdomain
mkdir /data/system 0775 system system
mkdir /data/system/wpa_supplicant 0771 wifi wifi # lqm added.
# Set DNS
#setprop net.dns1 192.168.128.2 #lqm changed.
setprop net.dns1 192.168.1.1
# Prepare for wifi
setprop wifi.interface ra0
# mkdir /data/misc/wifi/sockets 0770 wifi wifi
mkdir /data/misc/wifi/sockets 0771 wifi wifi #lqm changed property
# mkdir /data/misc/dhcp 0770 dhcp dhcp
# chown dhcp dhcp /data/misc/dhcp
mkdir /data/misc/dhcp 0771 system system #lqm changed.
# lqm changed.
service wpa_supplicant /system/bin/wpa_supplicant -dd -Dwext -ira0 -c /system/etc/wifi/wpa_supplicant.conf
group system wifi inet
disabled
oneshot
# lqm changed.
service dhcpcd /system/bin/dhcpcd ra0
group system dhcp
disabled
oneshot
默认init.rc中全使用的wlan0，而rt2860的网络名称为ra0，因此需全替换为ra0。
三：修改hardware/libhardware_legacy/wifi/wifi.c文件。
重新定义WIFI_DRIVER_MODULE_PATH和WIFI_DRIVER_MODULE_NAME宏，定义如下：
#ifndef WIFI_DRIVER_MODULE_PATH
#define WIFI_DRIVER_MODULE_PATH "/system/lib/modules/rt3070sta.ko"
#endif
#ifndef WIFI_DRIVER_MODULE_NAME
#define WIFI_DRIVER_MODULE_NAME "rt3070sta"
#endif
wifi.c用于启动时自动加载ko模块，这里暂时使用手动加载的方法，后续更新自动加载功能。
四：在/device/fsl/imx53_loco/BoardConfig.mk文件中增加一行（根据你的无线网卡类型来设置）：
BOARD_WPA_SUPPLICANT_DRIVER := WEXT
同时屏掉相关信息，修改后部分代码如下：
#WIFI_DRIVER_MODULE_PATH := "/system/lib/modules/ar6000.ko" #lqm changed.
WIFI_DRIVER_MODULE_PATH := "/system/lib/modules/rt3070sta.ko"
WIFI_DRIVER_MODULE_ARG := ""
#WIFI_DRIVER_MODULE_NAME := "ar6000" #lqm changed.
WIFI_DRIVER_MODULE_NAME := "rt3070sta"
WIFI_FIRMWARE_LOADER := ""
#WPA_SUPPLICANT_VERSION := VER_0_6_ATHEROS #lqm masked.
#BOARD_WLAN_ATHEROS_SDK := system/wlan/atheros/AR6kSDK.3.0_RC.298 #lqm masked.
#BOARD_WLAN_CHIP := AR6003 #lqm masked.
BOARD_WPA_SUPPLICANT_DRIVER := WEXT
注意WPA_SUPPLICANT_VERSION一定要屏蔽，否则将使用针对atheros的wpa_supplicant。
五：单独编译wpa_supplicant，将默认的wpa_wupplicant for atheros的文件替换掉：
source build/envsetup.sh
mm external/wpa_supplicant/ PRODUCT-imx53_loco-eng
这时将会在out/..../system/bin下生成新的wpa_supplicant文件。
如果使用默认的wpa_supplicant，执行时将会弹出如下错误：
===>rt_ioctl_giwscan. 4(4) BSS returned, data->length = 663
ioctl[SIOCSIWGENIE]: Operation not su===>rt_ioctl_giwscan. 4(4) BSS returned, 3
pported on transport endpoint
===>rt_ioctl_giwscan. 4(4) BSS returned, data->length = 663
ioctl[SIOCSIWGENIE]: Operation not ===>rt_ioctl_giwscan. 4(4) BSS returned, da3
supported on transport endpoint
===>rt_ioctl_giwscan. 4(4) BSS returned, data->length = 663
ioctl[SIOCSIWGENIE]: Operation not su===>rt_ioctl_giwscan. 4(4) BSS returned, 3
pported on transport endpoint
===>rt_ioctl_giwscan. 4(4) BSS returned, data->length = 663
ioctl[SIOCSIWGENIE]: Operation not su===>rt_ioctl_giwscan. 4(4) BSS returned, 3
pported on transport endpoint
===>rt_ioctl_giwscan. 5(5) BSS returned, data->length = 843
ioctl[SIOCSIWGENIE]: Operation not ===>rt_ioctl_giwscan. 5(5) BSS returned, da3
supported on transport endpoint
而且反复执行。
六：新建wpa_supplicant.conf文件，内容如下：
# WPA-PSK/TKIP
ctrl_interface=/system/bin/wpa_supplicant
network={
ssid="armeasy"
scan_ssid=1
key_mgmt=WPA-EAP WPA-PSK IEEE8021X NONE
pairwise=TKIP CCMP
group=CCMP TKIP WEP104 WEP40
psk="phosphor"
}
注意，ssid为路由的名称，phosphor为路由的密码，用户请根据自己的路由密码设置。
将wpa_supplicant.conf文件拷贝到/out/..../system/etc/wifi目录
七：将第一步生成的rt3070sta.ko文件拷贝到/out/..../system/lib/modules目录
八：重新编译android源码，将新生成的uramdisk.img烧录到SD卡：
sudo dd if=/tftpboot/uramdisk.img of=/dev/sdb bs=1M seek=6
将新生成的system.img烧录到SD卡：
sudo dd if=/tftpboot/system.img of=/dev/sdb2
九：重启开发板，进入文件系统后，加载驱动
手动加载驱动如下：
/system/lib/modules # insmod rt3070sta.ko
rt3070sta: module license 'unspecified' taints kernel.
Disabling lock debugging due to kernel taint
rt3070sta: Unknown symbol usb_alloc_urb (err 0)
rt3070sta: Unknown symbol usb_free_urb (err 0)
rt3070sta: Unknown symbol usb_alloc_coherent (err 0)
rt3070sta: Unknown symbol usb_register_driver (err 0)
rt3070sta: Unknown symbol usb_put_dev (err 0)
rt3070sta: Unknown symbol usb_get_dev (err 0)
rt3070sta: Unknown symbol usb_submit_urb (err 0)
rt3070sta: Unknown symbol usb_free_coherent (err 0)
rt3070sta: Unknown symbol usb_control_msg (err 0)
insmod: init_module 'rt3070sta.krt3070sta: Unknown symbol usb_deregister (err 0)
rt3070sta: Unknown symbol usb_kill_urb (err 0)
o' failed (No such file or directory)
这是没有添加GPL授权的原因，需要在驱动源码的文件os/linux/usb_main_dev.c文件的开头加上如下一行代码：
MODULE_LICENSE(“GPL”);
然后重新编译、重新加载，即可得到正确的结果。
正常的加载信息如下：
/ # insmod system/lib/modules/rt3070sta.ko
rtusb init rt2870 --->
=== pAd = d4a62000, size = 511440 ===
<-- RTMPAllocTxRxRingMemory, Status=0
<-- RTMPAllocAdapterBlock, Status=0
usbcore: registered new interface driver rt2870
/ #
正常加载后，可以通过下面的命令查询驱动是否正常加载：
cat /proc/net/dev
正常打印如下：
/ # cat /proc/net/dev
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
eth0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
usb0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
sit0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ra0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
/ #
[解决办法]
很强大，必须顶！
[解决办法]
感谢分享这么好的东西.
[解决办法]
lz很有爱，这么好的东西，下载测试一下. 然后跟着做。
[解决办法]
楼主你好，你使用android UI界面测试过wifi么？
我现在用的也是用53qsb+2870.
在linux环境下每次能ping通。
但是在android环境下经常ping不通，wifi很不稳定。
android版本是233.请问是否是android自身的bug？
[解决办法]
很强大
