手動載入驅動
####16th,Jul
驅動載入
modprobe libertas
modprobe libertas_sdio
載入第二行時出錯拉
# modprobe libertas_sdio
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
model=0xb
sd8686_helper.bin sd8686.bin
init: untracked pid 958 exited
過了一會出現：
libertas: can't load helper firmware
libertas: failed to load helper firmware
libertas_sdio: probe of mmc2:0001:1 failed with error -2
但是用lsmod又能看到
# lsmod
libertas_sdio 8776 0 - Live 0xbf022000
libertas 97416 1 libertas_sdio, Live 0xbf009000
usbserial 30256 0 - Live 0xbf000000

###使用insmod試一下
insmod /lib/modules/2.6.24.7/kernel/drivers/net/wireless/libertas/libertas.ko
insmod /lib/modules/2.6.24.7/kernel/drivers/net/wireless/libertas/libertas_sdio.ko
還是老樣子

###發現系統中沒有提到的檔案fireware檔案
從華恆的romfs/lib把fireware拷貝到 /nfs/rootfs/lib下
$$還是不行

###把fireware拷貝到system/etc/下面，終於可以載入了
如下：
# modprobe libertas_sdio
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
model=0xb
sd8686_helper.bin sd8686.bin
init: untracked pid 714 exited
init: untracked pid 717 exited
libertas: eth1: Marvell WLAN 802.11 adapter

$$$建議
Title：Android INIT not loading firmware
android員工答：You need to run the insmod in a separate process launched by init.

#########
理解原理
Android uses a modified wpa_supplicant (external/wpa_supplicant) daemon for wifi support which is controlled through a socket by hardware/libhardware_legacy/wifi/wifi.c (WiFiHW) that gets controlled from Android UI through android.net.wifi package from frameworks/base/wifi/java/android/net/wifi/ and it's corresponding jni implementation in frameworks/base/core/jni/android_net_wifi_Wifi.cpp Higher level network management is done in frameworks/base/core/java/android/net

1.在build/target/board/generic/BoardConfig.mk中增加
BOARD_WPA_SUPPLICANT_DRIVER := WEXT

2.開啟除錯資訊--可選
預設是不開啟除錯的
2.1 modify external/wpa_supplicant/common.c and set wpa_debug_level = MSG_DEBUG
2.2 modify common.h and change #define wpa_printf from if ((level) >= MSG_INFO) to if ((level) >= MSG_DEBUG)

3.建立system/etc/wifi/wpa_supplicant.conf
有2種socket
一種是android private socket
ctrl_interface=eth1
update_config=1
ap_scan=1  ###取決於wifi驅動，如果不行，則改為0試試
另一種是unix 標準socket，這裡先選用第二種
ctrl_interface=DIR=/data/system/wpa_supplicant GROUP=wifi
update_config=1
ap_scan=1  ###取決於wifi驅動，如果不行，則改為0試試

4在init.rc中增加以下語句

#@qiu
    mkdir /system/etc/wifi 0777 wifi wifi
    chmod 0777 /system/etc/wifi
    chmod 0777 /system/etc/wifi/wpa_supplicant.conf
    chown wifi wifi /system/etc/wifi/wpa_supplicant.conf
   
mkdir /data/misc/wifi 0777 wifi wifi
mkdir /data/misc/wifi/sockets 0770 wifi wifi
chmod 0777 /data/misc/wifi
chmod 0777 /data/misc/wifi/wpa_supplicant.conf
chown wifi wifi /data/misc/wifi
chown wifi wifi /data/misc/wifi/wpa_supplicant.conf

    # wpa_supplicant socket (unix socket mode)
    mkdir /data/system/wpa_supplicant 0777 wifi wifi
    chmod 0777 /data/system/wpa_supplicant
    chown wifi wifi /data/system/wpa_supplicant
#[email protected]

##如果是private socket，則是
mkdir /system/etc/wifi 0777 wifi wifi
chmod 0777 /system/etc/wifi
chmod 0777 /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 0777 wifi wifi
mkdir /data/misc/wifi/sockets 0770 wifi wifi
chmod 0777 /data/misc/wifi
chmod 0777 /data/misc/wifi/wpa_supplicant.conf
chown wifi wifi /data/misc/wifi
chown wifi wifi /data/misc/wifi/wpa_supplicant.conf

5.在init.rc中新增wpa_supplicant和dhcpcd啟動服務
service wpa_supplicant /system/bin/wpa_supplicant -dd -Dwext -ieth1 -c /system/etc/wifi/wpa_supplicant.conf
group system wifi inet
disabled
oneshot
##如果是pricvate socket則需要在group上面增加一行：
socket wpa_eth1 dgram 777 wifi wifi

service dhcpcd /system/bin/dhcpcd -f /system/etc/dhcpcd/dhcpcd.conf -d eth1
group system dhcp wifi
disabled
oneshot

5.5增加/system/etc/dhcpcd/dhcpcd.conf檔案內容
interface eth1
option subnet_mask, routers, domain_name_servers

6.把wifi驅動編譯進核心
首先init.rc中增加
setprop wifi.interface "eth1"
setprop wlan.driver.status "ok"
其次在修改hardware/libhardware_legacy/wifi/wifi.c
新的out/target/product/generic/system/lib/libhardware_legacy.so---v2
在函式wifi_load_driver()的體的開頭增加
//@qiu   
    LOGE("[email protected]i driver loaded !");
    return 0;
//[email protected]
在函式wifi_unload_driver()體的開頭增加
//@qiu
    LOGE("[email protected] driver unloaded!");
    return 0;
//[email protected]

####17th,Jul
把驅動從M改為*,得zImage-vvv39
開始啟動：
載入firmware的時候出錯
libertas: can't load helper firmware
libertas: failed to load helper firmware
libertas_sdio: probe of mmc2:0001:1 failed with error -2

看來是無法載入fireware

###嘗試修改wifi.c讓它自動載入模組
修改
#ifndef WIFI_DRIVER_MODULE_PATH1
#define WIFI_DRIVER_MODULE_PATH1         "/system/lib/modules/libertas.ko"
#endif
#ifndef WIFI_DRIVER_MODULE_PATH2
#define WIFI_DRIVER_MODULE_PATH2         "/system/lib/modules/libertas_sdio.ko"
#endif
#ifndef WIFI_DRIVER_MODULE_NAME1
#define WIFI_DRIVER_MODULE_NAME1         "libertas"
#endif
#ifndef WIFI_DRIVER_MODULE_NAME2
#define WIFI_DRIVER_MODULE_NAME2         "libertas_sdio"
#endif
並在此檔案的後面程式碼中做一定修改，wifi_load_driver()函式中也做相應修改
編譯得到libhardware_legacy.so---v3
 
-啟動後在設定中點選wifi
串列埠顯示如下，看來是能載入了
# libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
model=0xb
sd8686_helper.bin sd8686.bin
init: untracked pid 954 exited
init: untracked pid 957 exited
libertas: eth1: Marvell WLAN 802.11 adapter
但是wifi圖示下面顯示wifi不可用
檢視logcat的main：
 7899 E/WifiHW  (  708): Cannot access "/data/misc/wifi/wpa_supplicant.conf": Permission denied
 7900 E/WifiHW  (  708): Wi-Fi will not be enabled
 7901 W/WifiHW  (  708): [email protected] driver unloaded!
 7902 E/WifiService(  708): Failed to start supplicant daemon.
 7903 D/SettingsWifiEnabler(  791): Received wifi state changed from Enabling to Unknown

於是增加以下語句到init.rc
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
並且cp system/etc/wifi/wpa_supplicant.conf ./data/misc/wifi/

啟動，終於能開啟wifi，但還是無法開啟網頁
檢視logcat
4564 E/wpa_supplicant(  917): Failed to read or parse configuration '/system/etc/wifi/wpa_supplicant.conf'.
4565 E/WifiHW  (  708): Unable to open connection to supplicant on "/data/system/wpa_supplicant/sta": No such file or directory
4566 D/WifiService(  708): ACTION_BATTERY_CHANGED pluggedType: 1
4899 E/WifiHW  (  708): Supplicant not running, cannot connect
5574 E/WifiHW  (  708): Supplicant not running, cannot connect
5575 V/WifiStateTracker(  708): Supplicant died unexpectedly
5576 D/dalvikvm(  934): DexOpt: load 3102ms, verify 1519ms, opt 24ms
5577 D/installd(  665): DexInv: --- END '/system/app/Browser.apk' (success) ---
5578 D/NetworkStateTracker(  708): setDetailed state, old =IDLE and new state=DISCONNECTED
5579 D/ConnectivityService(  708): ConnectivityChange for WIFI: DISCONNECTED/DISCONNECTED

##在init.rc中把wpa_supplicant.conf許可權修改為777，
還是有錯誤：
5573 E/WifiHW  (  708): Unable to open connection to supplicant on "/data/system/wpa_supplicant/sta": No such file or director

##在init.rc中增加以下幾條語句
    setprop wifi.interface "eth1"
    setprop wlan.driver.status "ok"
    setprop wlan.interface "eth1"
結果還是不行logcat顯示
E/WifiHW (  708):Unable to open connection to supplicant on "/data/system/wpa_supplicant/eth1": No such file or directory

##在init.rc中dhcp服務啟動是為eth1的增加wifi組許可權
又出現新錯誤
如果開始就enable wifi就會出現以下錯誤：
E/WifiHW  (  709): Unable to open connection to supplicant on "/data/system/wpa_supplicant/eth1": Connection refused
因為這是開機預設啟動wifi，如果不起動，錯誤則是和上一條相同

###18th,Jul
##嘗試在wpa_supplicant.conf設定GROUP=system,還是不行，只好改回去

ls /data/system/wpa_supplicant/eth1 -l
srwxrwx---    1 1010     1010            0 Jul 18 08:22 /data/system/wpa_supplicant/eth1

# ls /data/system/wpa_supplicant/eth1 -l
srwxrwxrwx    1 1010     1010            0 Jul 18 08:22 /data/system/wpa_supplicant/eth1

###18th,Jul手動除錯
# wpa_supplicant -dd -Dwext -ieth1 -c /system/etc/wifi/wpa_supplicant.conf&
# ioctl[SIOCSIWPMKSA]: Invalid argument《《《《輸出的錯誤

# ls /data/system/wpa_supplicant/eth1 -l
srwxrwxrwx    1 1010     1010            0 Jul 18 13:14 /data/system/wpa_supplicant/eth1

#wpa_cli -i eth1 -p /data/system/wpa_supplicant
不知道該如何設定ap
bash# wpa_cli -ieth1 scan //搜尋無線網
bash# wpa_cli -ieth1 scan_results //顯示搜尋結果
bash# wpa_cli -ieth1 add_network
bash# iwconfig eth1 essid "you_wifi_net"
bash# wpa_cli -ieth1 password 0 "password"
bash# wpa_cli -ieth1 enable_network

###19th，Jul
修改vi frameworks/base/wifi/java/android/net/wifi/WifiStateTracker.java
把tiwlan0改eth1
暫時未編譯

###開始沒有選擇第二步的debug選項，選上，在external/wpa_supplicant目錄下有mm編譯
得到
system/bin/wpa_cli---vvv1
system/lib/libwpa_client.so---vvv1
system/bin/wpa_supplicant---vvv1
###試一下android private socket
修改vi system/etc/wifi/wpa_supplicant.conf
vi data/misc/wifi/wpa_supplicant.conf
修改init.rc
在chmod那裡把unix socket的那段註釋
在啟動wpa_supplicant的時候增加
socket wpa_eth1 dgram 660 wifi wifi

結果還是不行

###只好在external/wpa_supplicant/wpa_ctrl.c中新增
LOGW，注意得先加入標頭檔案和LOG_TAG
 17 #define LOG_TAG "WifiQiu"
 18 #include "cutils/log.h"
mm編譯得到
system/bin/wpa_cli---vvv2
system/lib/libwpa_client.so---vvv2
但是竟然沒有WifiQiu輸出，不知道是不是沒有用make而是mm的緣故

###20th,Jul
1.BoardConfig.mk增加了HAVE_CUSTOM_WIFI_DRIVER_2 := true
2.修改wifi/wifi.c中使得檢查和解除安裝驅動的兩個函式，用make編譯得到
libhardware_legacy.so---v4
system/bin/wpa_cli---vvv2.1
system/bin/wpa_supplicant-v2
system/lib/libwpa_client.so---vvv2.1

###上面的版本還沒有來的及測試，有發現問題
1.突然發現external/wpa_supplicant/wpa_ctrl.c中LOG不夠全面，
一共有三種情況，漏了一個函式沒有加，於是增加LOGW並使之可以區分
2.根據手動strace wpa_cli的提示
access("/data/misc/wifi/wpa_supplicant", F_OK) = -1 ENOENT (No such file or directory)
用grep 搜尋到所在檔案為external/wpa_supplicant/wpa_cli.c
把它修改為：/data/misc/wifi
用mm分別在external/wpa_supplicant和hardware/libhardware_legacy中編譯
得到
system/bin/wpa_cli---vvvvv3
system/lib/libwpa_client.so---vvv3
libhardware_legacy.so---v5

啟動之後發現是在對socket進行連線的時候出錯了
connect(ctrl->s, (struct sockaddr *) &ctrl->dest,sizeof(ctrl->dest)) < 0)
而且不能關閉wifi
只好重新修改wifi.c直接在unload函式中返回0，使得wifi能被關閉
libhardware_legacy.so---v5.1

###21th,Jul使用private的時候再次手動除錯
# wpa_supplicant -dd -Dwext -ieth1 -c /system/etc/wifi/wpa_supplicant.conf&
# ioctl[SIOCSIWPMKSA]: Invalid argument
mkdir[ctrl_interface]: Permission denied

[1] + Done(255)                  wpa_supplicant -dd -Dwext -ieth1 -c /system/etc/wifi/wpa_supplicant.conf
查詢mkdir發現是在ctrl_iface_unix.c中
錯誤是出現在#ifdef ANDROID之外阿，詭異

###用donut中external/wpa_supplicant下的driver_wext.c替換地掉eclair中的
mm重新編譯，得到：
wpa_supplicant---vvv3
$$$還是不行

###22th,Jul
把donut的wpa_supplicant資料夾拷貝到eclair下
用mm編譯得到
system/bin/wpa_cli---vvvvv4
system/bin/wpa_supplicant---vvv4
system/lib/libwpa_client.so---vvv4
wpa_supplicant---vvv3
終於可以搜尋到網路了，淚奔
但是，不能獲取到ip地址呵呵

logcat提示：
I/WifiStateTracker(  713): DhcpHandler: DHCP request failed: Timed out waiting for DHCP to finish

###手動啟動dhcp提示
eth1: open `/data/misc/dhcp/dhcpcd-eth1.pid': No such file or directory
在init.rc中增加
mkdir /data/misc/dhcp 0777 wifi wifi
chmod 0777 /data/misc/dhcp
chown wifi wifi /data/misc/dhcp
還是不能獲得地址
eth1: flock `/data/misc/dhcp/dhcpcd-eth1.pid': Try again
後來把上面的wifi 改為dhcp，還是不能獲得IP地址

$$
把dhcpcd殺了，手動啟動
# dhcpcd -f /system/etc/dhcpcd/dhcpcd.conf -d eth1
eth1: dhcpcd 4.0.1 starting
eth1: hardware address = 00:1a:6b:a2:38:65
eth1: executing `/system/etc/dhcpcd/dhcpcd-run-hooks', reason PREINIT
eth1: /system/etc/dhcpcd/dhcpcd-run-hooks: Permission denied
eth1: waiting for carrier
eth1: host does not support a monotonic clock - timing can skew
eth1: timed out
eth1: executing `/system/etc/dhcpcd/dhcpcd-run-hooks', reason FAIL
eth1: /system/etc/dhcpcd/dhcpcd-run-hooks: Permission denied

$$把許可權都改為777，再次執行
# dhcpcd -f /system/etc/dhcpcd/dhcpcd.conf -d eth1
eth1: dhcpcd 4.0.1 starting
eth1: hardware address = 00:1a:6b:a2:38:65
eth1: executing `/system/etc/dhcpcd/dhcpcd-run-hooks', reason PREINIT
eth1: waiting for carrier
eth1: host does not support a monotonic clock - timing can skew
eth1: timed out
eth1: executing `/system/etc/dhcpcd/dhcpcd-run-hooks', reason FAIL

$$還沒有關閉android機呢，重新開啟wifi，嘿嘿，能分配到地址了

但是...但是，還是不能上網，估計是由於地址的原因吧

把eth0禁用之後就可以上網了，呵呵

wifi移植告一段落