Wifi driver for Android KitKat 4.4 Wifi Transplantation

This article describes how to port the Realek RTL8723A Linux Wifi driver in Linux 3.10.

Prerequisites

Hardware Platform: Atmel SAMA5

Software Platform: Linux 3.10 + Android 4.4

Wifi module: RTL8723AU (USB Interface)

Realtek RTL8723A Wi-Fi Software & Driver for Linux and Android

Rtl8723a_wifi_linux_v4.1.6_7336.201301__ccc02.zip

Directory structure

Liaops @ ubuntu-server:/media/android/liaops/temp/RTL8723A_WiFi_linux_v4.1.6_7336.20130426 $ tree-L 2

.

── Android_ref_codes_JB_4.1

│ ── Linux-3.0.42_STATION_INFO_ASSOC_REQ_IES.diff.

│ ── Realtek_wifi_SDK_for_android_JB_4.1_20130306.tar.gz

│ ── Realtek_Wi-Fi_SDK_for_Android_JB_4_1.pdf.

── Android_ref_codes_JB_4.2 // transplantation of Android JB 4.2 Realtek Wifi

│ ── Linux-3.0.42_STATION_INFO_ASSOC_REQ_IES.diff.

│ ── Realtek_wifi_SDK_for_android_JB_4.2_20130208.tar.gz

│ └─Realtek_wi-fi_sdk_for_android_jb_4_2.pdf // transplant the document

── Android_reference_codes

│ ── Realtek_wifi_SDK_for_android_20120618.tar.gz

│ ── Realtek_wifi_SDK_for_android.txt

── Android_reference_codes_ICS_nl80211

│ ── Realtek_wifi_SDK_for_android_ICS_20120621.tar.gz

│ ── Realtek_Wi-Fi_SDK_for_Android_ICS.pdf.

── Document

│ ── HowTo_enable_driver_to_support_80211d.pdf

│ ├─%Howto_enable_driver_to_support_wifi_certification_testication

│ ── Howto_enable_the_power_saving_functionality #

│ ── HowTo_support_more_VidPids.pdf

│ ── _Dhcp_server_notes.txt

│ ├ ── Quick_start_guide_for_bridge=

│ ├─Quick_start_guide_for_driver_compilation_and_installation.pdf

│ ├ ── Quick_Start_Guide_for_SoftAP.pdf

│ ├ ── Quick_Start_Guide_for_Station_Mode.pdf

│ ── Realtek_WiFi_concurrent_mode_Introduction.pdf .pdf

│ ── RTK_P2P_WFD_Programming_guide.pdf

│ ├ ── SoftAP_Mode_features.pdf

│ ── Wireless_tools_porting_guide.pdf

│ ── Wpa_cli_with_wpa_supplicant.pdf

── Driver

│ └─Rtl8723a_wifi_linux_v4.1.6_7336.201301__ccc02.tar.gz // Realek RTL8723A Linux Wifi driver

── Hardware_wps_pbc

│ ── Readme.txt

│ ── Sample. c

── Install. sh

── Mp_tools

│ ── RTL8723A_MPDoc

── Readme.txt

── ReleaseNotes.pdf

── WiFi_Direct_User_Interface

│ ── Android. mk

│ ── Install. sh

│ ── P2p_api_test_linux.c

│ ── P2p_test.h

│ ── P2p_ui_test_linux.c

│ ── Start_Guide_P2P_User_Interface_Linux.pdf .pdf

├ ── Wireless_tools

│ └─Wireless_tools.30.rtl.tar.gz // a tool for configuring wireless networks in Linux, including iwlist, iwpriv, and iwconfig.

── Wpa_supplicant_hostapd

── P2p_hostapd.conf

── Rtl_hostapd_2G.conf

── Rtl_hostapd_5G.conf

── Wpa_0_8.conf

├──Wpa_supplicant_8_jb_4.20.rtw_r7281.201302.16.tar.gz

├──Wpa_supplicant_8_jb_4.2_rtw_r7279.201302.16.tar.gz

└──Wpa_supplicant_hostapd-0.8_rtw_r7048.201302.16.tar.gz

Kernel configuration

Ensure Linux configuration before kernel Compilation

# Make menuconfig

Enable WLAN Network support:

[*] Networking support --->

-*-Wireless --->

Enable Wireless LAN Device Driver:

Device Drivers --->

[*] Network device support --->

[*] Wireless LAN --->

Enable RealTekRTL8712U wireless NIC Driver:

Device Drivers --->

[*] Staging drivers --->

RealTek RTL8712U (RTL8192SU) Wireless LAN NICdriver

The purpose is to enable CONFIG_WIRELESS_EXT = y and CONFIG_WEXT_PRIV = y

The preceding operations enable the following CONFIG options in the kernel:

CONFIG_WIRELESS = y

CONFIG_WLAN = y

CONFIG_WIRELESS_EXT = y

CONFIG_WEXT_CORE = y

CONFIG_WEXT_PROC = y

CONFIG_WEXT_PRIV = y

Enable USB Host Support:

Device Drivers --->

[*] USB support --->

<*> Support for Host-side USB

<*> Ehci hcd (USB 2.0) support

Compile the kernel

Compile the kernel according to the preceding Kernel configuration.

Wifi driver configuration and compilation

Decompress the driver source code: rtl8723a_wifi_linux_v4.1.6_7336.201301__ccc02.tar.gz

Go to the driver source code directory:

── Autoconf_rtl8723a_sdio_linux.h

── Autoconf_rtl8723a_usb_linux.h

── Clean

── Core

── Hal

── Ifcfg-wlan0

── Include

── Kconfig

── Kconfig_rtl8723a_sdio_linux

── Kconfig_rtl8723a_usb_linux

── Make_drv

── Makefile

── OS _dep

── Runwpa

── Wlan0dhcp

Modify Makefile and add AT91 platform support

@-44,7 + 44,7 @ CONFIG_EXT_CLK = n

CONFIG_FTP_PROTECT = n

CONFIG_WOWLAN = n

-Config_platform_i1__pc = y

+ Config_platform_i1__pc = n

CONFIG_PLATFORM_ANDROID_X86 = n

CONFIG_PLATFORM_ARM_S3C2K4 = n

CONFIG_PLATFORM_ARM_PXA2XX = n

@-75,6 + 75,7 @ CONFIG_PLATFORM_ARM_SUN6I = n

Config_platform_actions_atm 702x = n

CONFIG_PLATFORM_MN10300 = n

CONFIG_PLATFORM_ACTIONS_ATV5201 = n

+ CONFIG_PLATFORM_ARM_AT91 = y

CONFIG_DRVEXT_MODULE = n

@-651,6 + 652,14 @ KVER: =$ (KERNEL_VER)

KSRC: = $ (kernel DIR)/.../../kernel/linux-$ (KERNEL_VER)

Endif

+ Ifeq ($ (CONFIG_PLATFORM_ARM_AT91), y)

+ EXTRA_CFLAGS + =-DCONFIG_LITTLE_ENDIAN

+ ARCH: = arm

+ CROSS_COMPILE: =/usr/local/CodeSourcery/Sourcery_G ++ _ Lite/bin/arm-none-eabi-

+ KSRC: =/media/android/liaops/miura/kernel

+ MODULE_NAME: = wlan

+ Endif

+

Ifneq ($ (USER_MODULE_NAME ),)

MODULE_NAME: = $ (USER_MODULE_NAME)

Endif

Modify autoconf_rtl8723a_usb_linux.h to enable Stas + P2P coexistence mode:

@-50, 7 + 50, 7 @@

# DefineSUPPORT_HW_RFOFF_DETECTED

-// # Defineconfig_ioctl_201780211

+ # Defineconfig_ioctl_201780211

# IfdefCONFIG_PLATFORM_ARM_SUNxI

# Ifndef config_ioctl_201780211

# Define config_ioctl_201780211

@-59,7 + 59,7 @@

# Ifdefconfig_ioctl_201780211

// # Define rtw_use_201780211_sta_event/* Indecate new sta asoc through1_80211_new_sta */

-# Define config_201780211_force_compatible_2_6_37_under

+ // # Define config_201780211_force_compatible_2_6_37_under

// # Define config_debug_201780211

# Define CONFIG_SET_SCAN_DENY_TIMER

# Endif

@-86,7 + 86,7 @@

// # Define CONFIG_DBG_P2P

# Define CONFIG_P2P_PS

-// # Define CONFIG_P2P_IPS

+ # Define CONFIG_P2P_IPS

# Endif

// Added by Kurt20110511

@-102,7 + 102,7 @@

# DefineCONFIG_LAYER2_ROAMING

# DefineCONFIG_LAYER2_ROAMING_RESUME

-// # DefineCONFIG_CONCURRENT_MODE

+ # DefineCONFIG_CONCURRENT_MODE

# IfdefCONFIG_CONCURRENT_MODE

# Define CONFIG_TSF_RESET_OFFLOAD // For 2 port tsf sync.

// # Define CONFIG_HWPORT_SWAP // Port0-> Sec, Port1-> Pri

Compilation driver

Make KSRC = <内核源代码码路径>

The Wifi driver module is obtained in the current directory: wlan. ko

Compile Android source code

Compile wireless_tools wireless network management tool

Decompress wireless_tools.30.rtl.tar.gz to the Android source code external/directory.

(1) tar zxvf wireless_tools.30.rtl.tar.gz

(2) cp wireless_tools.30.rtl/external/

(3) cd

(4) make iwconfig iwlist iwpriv

Install the Wifi Driver Module

Copy wlan. ko to the out/target/product/sama5d3/system/lib/modules directory of the Android file system.

ProductionAndroidRoot file system and download to Development Board

Test

USB Wifi module inserted after startup

Usb 1-2: newhigh-speed USB device number 2 using atmel-ehci

Usb 1-2: NewUSB device found, idVendor = 0133, idProduct = 0724

Usb 1-2: NewUSB device strings: Mfr = 1, Product = 2, SerialNumber = 3

Usb 1-2: Product: 802.11n WLAN Adapter

Usb 1-2: Manufacturer: Realtek

Usb 1-2: SerialNumber: 00e04c000001

Before loading a module

Root @ sama5d3:/# netcfg

Eth0 UP 0.0.0.0/0 0x0000000033a: 1f: 34: 08: 54: 54

Can0 DOWN 0.0.0.0/0 0x0000008000: 00: 00: 00: 00: 00

Sit0 DOWN 0.0.0.0/0 0x0000008000: 00: 00: 00: 00: 00

Lo UP 127.0.0.1/8 0x0000004900: 00: 00: 00: 00: 00

Load Module

Root @ sama5d3:/# insmod/system/lib/modules/wlan. ko

Usbcore: registered new interface driver rtl8723au

After the module is loaded

Root @ sama5d3:/# netcfg

Wlan0 DOWN 0.0.0.0/0 0x00001002 00: 02: 72: 3c: 0c: c1

Wlan1 DOWN 0.0.0.0/0 0x00001002 02: 02: 72: 3c: 0c: c1

Eth0 UP 0.0.0.0/0 0 0x00001043 3a: 1f: 34: 08: 54: 54

Can0 DOWN 0.0.0.0/0 0 0x00000080 00: 00: 00: 00: 00: 00

Sit0 DOWN 0.0.0.0/0 0 0x00000080 00: 00: 00: 00: 00: 00

Lo UP 127.0.0.1/8 0x00000049 00: 00: 00: 00: 00: 00

We can see two more interfaces: wlan0 and wlan1.

Open wlan0

Root @ sama5d3:/# netcfg wlan0 up

IPv6: ADDRCONF (NETDEV_UP): wlan0: link is not ready

RTL871X: nolinked power save enter

Run the command iwlist wlan0 scanning to search for available wireless APs.

Some results are as follows:

Root @ sama5d3:/# iwlist wlan0 scanning

RTL871X: nolinked power save leave

Wlan0Scan completed:

Cell 01-Address: D8: 15: 0D: D9: 1F: F0

ESSID: "Intest_Hardware"

Protocol: IEEE 802.11bgn

Mode: Master

Frequency: 2.412 GHz (Channel 1)

Encryption key: on

Bit Rates: 300 Mb/s

Extra: wpa_ie = dd160050f201010950f204010950f204010950f202

IE: WPA Version 1

Group Cipher: CCMP

Pairwise Ciphers (1): CCMP

Authentication Suites (1): PSK

Extra: rsn_ie = 30140100000fac040100000fac040100000fac020000

IE: IEEE 802.11i/WPA2 Version 1

Group Cipher: CCMP

Pairwise Ciphers (1): CCMP

Authentication Suites (1): PSK

IE: Unknown: dd180050f204254a00011010440001021049000600372a000120

Quality = 0/100 Signal level =-74 dBm

Cell 02-Address: A8: 57: 4E: FC: 4B: 3E

ESSID: "\ xBE \ xDE \ xC3 \ xC0 \ xB9 \ xFA \ xBC \ xCA"

Protocol: IEEE 802.11bgn

Mode: Master

Frequency: 2.437 GHz (Channel 6)

Encryption key: on

Bit Rates: 300 Mb/s

Extra: wpa_ie = dd160050f201010950f204010950f204010950f202

IE: WPA Version 1

Group Cipher: CCMP

Pairwise Ciphers (1): CCMP

Authentication Suites (1): PSK

Extra: rsn_ie = 30140100000fac040100000fac040100000fac020000

IE: IEEE 802.11i/WPA2 Version 1

Group Cipher: CCMP

Pairwise Ciphers (1): CCMP

Authentication Suites (1): PSK

IE: Unknown

Quality = 0/100 Signal level =-71 dBm

Cell 03-Address: 1C: BD: B9: C7: 84: 98

ESSID: "hikvision"

Protocol: IEEE 802.11bgn

Mode: Master