WiFi transplantation process record

[Switch] This document describes how to transplant wifi. You need to analyze and grasp the specific architecture ~

 

 

Manually load the driver
#### 16th, Jul
Driver Loading
Modprobe libertas
Modprobe libertas_sdio
Error pulling when loading the second row
# 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
After a while, the following will appear:
Libertas: Can't load helper firmware
Libertas: failed to load helper firmware
Libertas_sdio: Probe of mmc2: 0001: 1 failed with error-2
But you can see it again with lsmod.
# Lsmod
Libertas_sdio 8776 0-live 0xbf022000
Libertas 97416 1 libertas_sdio, live 0xbf009000
Usbserial 30256 0-live 0xbf000000

### Try using insmod
Insmod/lib/modules/2.6.24.7/kernel/Drivers/NET/wireless/libertas. Ko
Insmod/lib/modules/2.6.24.7/kernel/Drivers/NET/wireless/libertas/libertas_sdio.ko
Still the same

### Find the file fireware file NOT MENTIONED IN THE SYSTEM
Copy fireware from romfs/lib of huaheng to/nfs/rootfs/lib
$ Or not

### Copy fireware to system/etc/and finally load it
As follows:
# 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

$ Suggestions
Title: Android init not loading firmware
Android Employee A: You need to run the insmod in a separate process launched by init.

#########
Understanding principles
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. Add in build/target/board/generic/boardconfig. mk
Board_wpa_supplicant_driver: = wext

2. Open debugging information -- Optional
Debugging is disabled by default.
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. Create System/etc/WiFi/wpa_supplicant.conf
There are two types of socket
One is Android private socket
Ctrl_interface = eth1
Update_config = 1
Ap_scan = 1 ### depends on the WiFi driver. If not, change it to 0.
The other is the UNIX standard socket. The second is selected here.
Ctrl_interface = dir =/data/system/wpa_supplicant group = WiFi
Update_config = 1
Ap_scan = 1 ### depends on the WiFi driver. If not, change it to 0.

4. Add the following statement to init. RC:

# @ Qiu
Mkdir/system/etc/WiFi 0777 WiFi
Chmod 0777/system/etc/WiFi
Chmod 0777/system/etc/WiFi/wpa_supplicant.conf
Chown WiFi/system/etc/WiFi/wpa_supplicant.conf

Mkdir/data/MISC/WiFi 0777 WiFi
Mkdir/data/MISC/WiFi/sockets 0770 WiFi
Chmod 0777/data/MISC/WiFi
Chmod 0777/data/MISC/WiFi/wpa_supplicant.conf
Chown WiFi/data/MISC/WiFi
Chown WiFi/data/MISC/WiFi/wpa_supplicant.conf

# Wpa_supplicant socket (UNIX socket mode)
Mkdir/data/system/wpa_supplicant 0777 WiFi
Chmod 0777/data/system/wpa_supplicant
Chown WiFi/data/system/wpa_supplicant
# Qiu @

# For private socket, yes
Mkdir/system/etc/WiFi 0777 WiFi
Chmod 0777/system/etc/WiFi
Chmod 0777/system/etc/WiFi/wpa_supplicant.conf
Chown WiFi/system/etc/WiFi/wpa_supplicant.conf

# Wpa_supplicant control socket for Android wifi. C (Android private socket)
Mkdir/data/MISC/WiFi 0777 WiFi
Mkdir/data/MISC/WiFi/sockets 0770 WiFi
Chmod 0777/data/MISC/WiFi
Chmod 0777/data/MISC/WiFi/wpa_supplicant.conf
Chown WiFi/data/MISC/WiFi
Chown WiFi/data/MISC/WiFi/wpa_supplicant.conf

5. Add wpa_supplicant and dhcpcd startup services to init. RC.
Service wpa_supplicant/system/bin/wpa_supplicant-dd-dwext-ieth1-C/system/etc/WiFi/wpa_supplicant.conf
Group system WiFi inet
Disabled
Oneshot
# If it is a pricvate socket, add a line to the group:
Socket wpa_eth1 dgram 777 WiFi

Service dhcpcd/system/bin/dhcpcd-F/system/etc/dhcpcd. conf-D eth1
Group system DHCP WiFi
Disabled
Oneshot

5.5 Add the/system/etc/dhcpcd. conf file.
Interface eth1
Option subnet_mask, routers, domain_name_servers

6. Compile the WiFi driver into the kernel
First, add
Setprop wifi. Interface "eth1"
Setprop WLAN. Driver. Status "OK"
Next, modify Hardware/libhardware_legacy/WiFi/wifi. C.
New out/target/product/generic/system/lib/libhardware_legacy.so --- v2
Add at the beginning of the body of the function wifi_load_driver ()
// @ Qiu
LogE ("Weber @ WiFi driver loaded! ");
Return 0;
// Qiu @
Add at the beginning of the function wifi_unload_driver ()
// @ Qiu
LogE ("Weber @ WiFi driver unloaded! ");
Return 0;
// Qiu @

#### 17th, Jul
Change drive from m to *, get zImage-vvv39
Start:
An error occurred while loading firmware.
Libertas: Can't load helper firmware
Libertas: failed to load helper firmware
Libertas_sdio: Probe of mmc2: 0001: 1 failed with error-2

It seems that fireware cannot be loaded.

### Try to modify wifi. C to enable it to automatically load modules
Modify
# 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
Make some modifications in the code after this file, and also modify the wifi_load_driver () function.
Libhardware_legacy.so --- v3
 
-Click WiFi in settings after startup
The serial port is shown as follows. It seems that it can be loaded.
# 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
However, WiFi is unavailable under the WiFi icon
View the main of logcat:
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): Weber @ WiFi driver unloaded!
7902 E/wifiservice (708): failed to start supplicant daemon.
7903 D/settingswifienabler (791): received WiFi state changed from enabling to unknown

Add the following statement to init. RC.
Mkdir/data/MISC/WiFi 0770 WiFi
Mkdir/data/MISC/WiFi/sockets 0770 WiFi
Chmod 0770/data/MISC/WiFi
Chmod 0660/data/MISC/WiFi/wpa_supplicant.conf
Chown WiFi/data/MISC/WiFi
Chown WiFi/data/MISC/WiFi/wpa_supplicant.conf
And CP system/etc/WiFi/wpa_supplicant.conf./data/MISC/WiFi/

Start, and finally enable WiFi, but still cannot open the webpage
View 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 3102 ms, verify 1519 ms, opt 24 Ms
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

# Modify the wpa_supplicant.conf permission to 777 in init. RC,
There are still errors:
5573 E/wifihw (708): Unable to open connection to supplicant on "/data/system/wpa_supplicant/sta": no such file or director

# Add the following statements to init. RC:
Setprop wifi. Interface "eth1"
Setprop WLAN. Driver. Status "OK"
Setprop WLAN. Interface "eth1"
The result is still not displayed in logcat.
E/wifihw (708): Unable to open connection to supplicant on "/data/system/wpa_supplicant/eth1": no such file or directory

# In init. RC, the DHCP service is enabled to add the WiFi group permission for eth1.
A new error occurs.
If enable WiFi is enabled at the beginning, the following error occurs:
E/wifihw (709): Unable to open connection to supplicant on "/data/system/wpa_supplicant/eth1": Connection refused
Because this is the default boot WiFi, if not started, the error is the same as the previous

### 18th, Jul
# Try to set group = System in wpa_supplicant.conf, but it still doesn't work, so I have to change it back.

Ls/data/system/wpa_supplicant/eth1-l
Srwxrwx --- 1 1010 1010 0 Jul 18/data/system/wpa_supplicant/eth1

# Ls/data/system/wpa_supplicant/eth1-l
Srwxrwxrwx 1 1010 1010 0 Jul 18/data/system/wpa_supplicant/eth1

### 18th, Jul manual debugging
# Wpa_supplicant-dd-dwext-ieth1-C/system/etc/WiFi/wpa_supplicant.conf &
# IOCTL [siocsiwpmksa]: invalid argument "output errors"

# Ls/data/system/wpa_supplicant/eth1-l
Srwxrwxrwx 1 1010 1010 0 Jul 18/data/system/wpa_supplicant/eth1

# Wpa_cli-I eth1-P/data/system/wpa_supplicant
I don't know how to set the AP
Bash # wpa_cli-ieth1 scan // search for Wireless Networks
Bash # wpa_cli-ieth1 scan_results // Display Search Results
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
Modify VI frameworks/base/WiFi/Java/Android/NET/WiFi/wifistatetracker. Java
Change tiwlan0 to eth1
Not compiled yet

### At the beginning, the debug option of step 2 is not selected. On this option, MM compilation is available in the external/wpa_supplicant directory.
Get
System/bin/wpa_cli --- vvv1
System/lib/libwpa_client.so --- vvv1
System/bin/wpa_supplicant --- vvv1
### Try Android private socket
Modify VI system/etc/WiFi/wpa_supplicant.conf
VI data/MISC/WiFi/wpa_supplicant.conf
Modify init. RC
Comment the UNIX socket section in chmod
Added when wpa_supplicant was started.
Socket wpa_eth1 dgram 660 WiFi

The result still does not work.

### Add it to external/wpa_supplicant/wpa_ctrl.c
Logw. Note that the header file and log_tag must be added first.
17 # define log_tag "wifiqiu"
18 # include "cutils/log. H"
MM compiled
System/bin/wpa_cli --- vvv2
System/lib/libwpa_client.so --- vvv2
However, there is no wifiqiu output. I don't know if make is not used, but because of mm.

### 20th, Jul
1. Added have_custom_wifi_driver_2: = true to boardconfig. mk.
2. Modify the WiFi/wifi. C to check and uninstall the two functions of the driver, and compile them with make.
Libhardware_legacy.so --- v4
System/bin/wpa_cli --- vvv2.1
System/bin/wpa_supplicant-v2
System/lib/libwpa_client.so --- vvv2.1

### The above version has not been tested yet, and problems have been found
1. The log in external/wpa_supplicant/wpa_ctrl.c is not comprehensive,
There are three cases in which a function is not added, so the logw is added and can be distinguished.
2. Follow the prompts in manual strace wpa_cli
Access ("/data/MISC/WiFi/wpa_supplicant", f_ OK) =-1 enoent (no such file or directory)
Use grep to search for the external/wpa_supplicant/wpa_cli.c file.
Change it to/data/MISC/WiFi
Compile with mm in external/wpa_supplicant and hardware/libhardware_legacy respectively
Get
System/bin/wpa_cli --- vvvvv3
System/lib/libwpa_client.so --- vvv3
Libhardware_legacy.so --- V5

An error occurred while connecting the socket after startup.
Connect (CTRL-> S, (struct sockaddr *) & Ctrl-> DEST, sizeof (CTRL-> DEST) <0)
And cannot disable WiFi
I had to re-Modify wifi. C and directly return 0 in the unload function so that WiFi can be disabled.
Libhardware_legacy.so --- v5.1

### Manual debugging again when Jul uses private
# 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
Mkdir is found in ctrl_iface_unix.c.
The error occurs outside of # ifdef Android, which is strange.

### Replace driver_wext.c in external/wpa_supplicant in Donut
Re-compile mm to get:
Wpa_supplicant --- vvv3
$ Or not

### 22th, Jul
Copy the donut wpa_supplicant folder to eclair.
Compiled with mm
System/bin/wpa_cli --- vvvvv4
System/bin/wpa_supplicant --- vvv4
System/lib/libwpa_client.so --- vvv4
Wpa_supplicant --- vvv3
Finally, you can find the network.
However, the IP address cannot be obtained.

Logcat prompt:
I/wifistatetracker (713): dhcphandler: DHCP request failed: timed out waiting for DHCP to finish

### Manual DHCP startup prompt
Eth1: Open '/data/MISC/DHCP/dhcpcd-eth1.pid': no such file or directory
Add in init. RC
Mkdir/data/MISC/DHCP 0777 WiFi
Chmod 0777/data/MISC/DHCP
Chown WiFi/data/MISC/DHCP
Still cannot get the address
Eth1: Flock '/data/MISC/DHCP/dhcpcd-eth1.pid': Try again
Later, I changed the above wifi to DHCP and still could not obtain the IP address.

$
Kill dhcpcd and start it manually
# Dhcpcd-F/system/etc/dhcpcd. conf-D eth1
Eth1: dhcpcd 4.0.1 starting
Eth1: hardware address = 00: 1A: 6B: A2: 38: 65
Eth1: executing '/system/etc/dhcpcd-run-hooks', reason preinit
Eth1:/system/etc/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-run-hooks', reason fail
Eth1:/system/etc/dhcpcd-run-hooks: Permission denied

$ Change all permissions to 777 and execute again
# Dhcpcd-F/system/etc/dhcpcd. conf-D eth1
Eth1: dhcpcd 4.0.1 starting
Eth1: hardware address = 00: 1A: 6B: A2: 38: 65
Eth1: executing '/system/etc/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-run-hooks', reason fail

$ The android server has not been closed yet. re-enable wifi. Hey, you can allocate the address.

However, I still cannot access the Internet. It is probably because of the address.

After eth0 is disabled, you can access the Internet.

WiFi porting has come to an end

 

This article from the csdn blog, reproduced please indicate the source: http://blog.csdn.net/king_sundi/archive/2010/12/07/6060948.aspx