& & 本文讲述在Linux 3.10下Realek RTL8723A Linux Wifi 驱动的移植。& & Prerequisites& & 硬件平台：Atmel SAMA5& & 软件平台：Linux 3.10 + Android 4.4& & Wifi模组：RTL8723AU (USB接口)& & Realtek RTL8723A Wi-Fi Software&Driver for Linux and Android& & RTL8723A_WiFi_linux_v4.1.6_6_CCC02.zip& & 目录结构& & liaops@ubuntu-server:/media/android/liaops/temp/RTL8723A_WiFi_linux_v4.1.6_6$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_.tar.gz& & │
└── Realtek_Wi-Fi_SDK_for_Android_JB_4_1.pdf& & ├──android_ref_codes_JB_4.2
// Android JB 4.2 Realtek Wifi移植& & │
├──linux-3.0.42_STATION_INFO_ASSOC_REQ_IES.diff& & │
├── realtek_wifi_SDK_for_android_JB_4.2_.tar.gz& & │
└──Realtek_Wi-Fi_SDK_for_Android_JB_4_2.pdf
//移植文档& & ├──android_reference_codes& & │
├── realtek_wifi_SDK_for_android_.tar.gz& & │
└── realtek_wifi_SDK_for_android.txt& & ├──android_reference_codes_ICS_nl80211& & │
├── realtek_wifi_SDK_for_android_ICS_.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_test.pdf& & │
├── HowTo_enable_the_power_saving_functionality.pdf& & │
├── HowTo_support_more_VidPids.pdf& & │
├── linux_dhcp_server_notes.txt& & │
├── Quick_Start_Guide_for_Bridge.pdf& & │
├──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& & │
├── 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_6_CCC02.tar.gz
// Realek RTL8723A Linux Wifi 驱动& & ├── 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& & ├── wireless_tools& & │
└──wireless_tools.30.rtl.tar.gz
//Linux下对无线网络配置的工具，包括iwlist,iwpriv,iwconfig等& & └──wpa_supplicant_hostapd& & ├── p2p_hostapd.conf& & ├── rtl_hostapd_2G.conf& & ├── rtl_hostapd_5G.conf& & ├── wpa_0_8.conf& & ├──wpa_supplicant_8_jb_4.1_rtw_r4.tar.gz& & ├──wpa_supplicant_8_jb_4.2_rtw_r4.tar.gz& & └──wpa_supplicant_hostapd-0.8_rtw_r4.tar.gz& & 内核配置& & 内核编译前确保Linux配置& & # make menuconfig& & 使能WLAN网络支持：& & [*] Networking support--->& & -*- Wireless --->& & 使能Wireless LAN设备驱动：& & Device Drivers --->& & [*] Network device support --->& & [*] Wireless LAN --->& & 使能RealTekRTL8712U无线网卡驱动：& & Device Drivers --->& & [*] Staging drivers --->& & RealTek RTL8712U (RTL8192SU) Wireless LAN NICdriver& & 目的是打开CONFIG_WIRELESS_EXT=y和CONFIG_WEXT_PRIV=y& & 上述操作在内核中使能下述CONFIG选项：& & CONFIG_WIRELESS=y& & CONFIG_WLAN=y& & CONFIG_WIRELESS_EXT=y& & CONFIG_WEXT_CORE=y& & CONFIG_WEXT_PROC=y& & CONFIG_WEXT_PRIV=y& & 使能USB Host支持：& & Device Drivers --->& & [*] USB support --->& & Support for Host-side USB& & EHCI HCD (USB 2.0) support& & 编译内核& & 根据上述内核配置编译内核。& & Wifi驱动配置与编译& & 解压缩驱动源码：rtl8723A_WiFi_linux_v4.1.6_6_CCC02.tar.gz& & 进入驱动源码目录：& & ├──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& & 修改Makefile,添加AT91平台支持& & @@-44,7 +44,7 @@ CONFIG_EXT_CLK = n& & CONFIG_FTP_PROTECT =n& & CONFIG_WOWLAN = n& & -CONFIG_PLATFORM_I386_PC= y& & +CONFIG_PLATFORM_I386_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_ATM702X= n& & CONFIG_PLATFORM_MN10300= n& & CONFIG_PLATFORM_ACTIONS_ATV5201= n& & +CONFIG_PLATFORM_ARM_AT91= y& & CONFIG_DRVEXT_MODULE= n& & @@-651,6 +652,14 @@ KVER := $(KERNEL_VER)& & KSRC:=$(CFGDIR)/../../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& & 修改autoconf_rtl8723a_usb_linux.h以使能STA+P2P并存模式：& & @@-50,7 +50,7 @@& & #defineSUPPORT_HW_RFOFF_DETECTED& & -//#defineCONFIG_IOCTL_CFG80211& & +#defineCONFIG_IOCTL_CFG80211& & #ifdefCONFIG_PLATFORM_ARM_SUNxI& & #ifndef CONFIG_IOCTL_CFG80211& & #define CONFIG_IOCTL_CFG80211& & @@-59,7 +59,7 @@& & #ifdefCONFIG_IOCTL_CFG80211& & //#define RTW_USE_CFG80211_STA_EVENT /* Indecate new sta asoc throughcfg80211_new_sta */& & -#define CONFIG_CFG80211_FORCE_COMPATIBLE_2_6_37_UNDER& & +//#define CONFIG_CFG80211_FORCE_COMPATIBLE_2_6_37_UNDER& & //#define CONFIG_DEBUG_CFG80211& & #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 Kurt& & @@-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& & 编译驱动& & make KSRC=& & 当前目录下得到Wifi驱动模块：wlan.ko& & 编译Android源代码& & 编译wireless_tools无线网络管理工具& & 解压缩wireless_tools.30.rtl.tar.gz到Android源代码 external/目录下& & (1)tar zxvf wireless_tools.30.rtl.tar.gz& & (2)cp wireless_tools.30.rtl /external/& & (3)cd& & (4)make iwconfig iwlist iwpriv& & 安装Wifi驱动模块& & 将wlan.ko拷贝到Android文件系统out/target/product/sama5d3/system/lib/modules目录下& & 制作Android根文件系统并烧写到开发板& & 测试& & 启动后插入USB Wifi模块& & usb 1-2: newhigh-speed USB device number 2 using atmel-ehci& & usb 1-2: NewUSB device found, idVendor=0bda, 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& & 加载模块前& & root@sama5d3:/ # netcfg& & eth0
0xa:1f:34:08:54:54& & can0
0x:00:00:00:00:00& & sit0
0x:00:00:00:00:00& & lo
127.0.0.1/8
0x:00:00:00:00:00& & 加载模块& & root@sama5d3:/# insmod /system/lib/modules/wlan.ko& & usbcore:registered new interface driver rtl8723au& & 加载模块后& & root@sama5d3:/# netcfg& & wlan0 DOWN 0.0.0.0/0 0x:02:72:3c:0c:c1& & wlan1 DOWN 0.0.0.0/0 0x:02:72:3c:0c:c1& & eth0 UP 0.0.0.0/0 0xa:1f:34:08:54:54& & can0 DOWN 0.0.0.0/0 0x:00:00:00:00:00& & sit0 DOWN 0.0.0.0/0 0x:00:00:00:00:00& & lo UP 127.0.0.1/8 0x:00:00:00:00:00& & 可以看到多了两个接口wlan0和wlan1。& & 打开wlan0& & root@sama5d3:/# netcfg wlan0 up& & IPv6:ADDRCONF(NETDEV_UP): wlan0: link is not ready& & RTL871X:nolinked power save enter& & 执行命令iwlist wlan0 scanning,搜索可用的无线AP& & 部分结果如下：& & 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=dd& & IE: WPA Version 1& & Group Cipher : CCMP& & Pairwise Ciphers (1) : CCMP& & Authentication Suites (1) : PSK& & Extra:rsn_ie=facfacfac020000& & IE: IEEE 802.11i/WPA2 Version 1& & Group Cipher : CCMP& & Pairwise Ciphers (1) : CCMP& & Authentication Suites (1) : PSK& & IE: Unknown: DD104A& & 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=dd& & IE: WPA Version 1& & Group Cipher : CCMP& & Pairwise Ciphers (1) : CCMP& & Authentication Suites (1) : PSK& & Extra:rsn_ie=facfacfac020000& & IE: IEEE 802.11i/WPA2 Version 1& & Group Cipher : CCMP& & Pairwise Ciphers (1) : CCMP& & Authentication Suites (1) : PSK& & IE: Unknown:DD9BA4EFC4B502D4C494E4BC2D2E2EAC2DE& & Quality=0/100 Signal level=-71 dBm& & Cell 03 - Address: 1C:BD:B9:C7:84:98& & ESSID:"hikvision"& & Protocol:IEEE 802.11bgn& & Mode:Master
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Android（20）
1&&&&&&概述
平台：freescale i.MX 6Quad 4核开发板MCIMX6Q-SDB（不带屏幕）
操作系统：Android 4.2.2_1
内核：3.0.35
显示屏：LG的LP101WX1-SLN2
显示屏参数：分辨率，色彩18位，色彩数262K，时钟频率69.3M Hz
接口：LVDS0
2&&&&&&移植步骤
2.1&&&&硬件连接
显示屏通过LVDS0接口与开发板连接，开发板提供的LVDS0接口如下：
如上图所示，LVDS0接口共有33Pin，包括：
1）& 使能脚CABC_EN0，亮度调节DSP0_CONTRAST
2）& 一组I2C Pin6~7
3）& 三组数据线Pin8~Pin15，一组时钟线Pin17~18
4）& 电源、地等
显示屏LP101WX1的硬件接口如下：
如上图，显示屏提供的LVDS接口共有40Pin，包括3组数据线，1组时钟线，PWM脚和LED_EN脚等。它与开发板的连接方式如下：
1）& 把LP101WX0的3组时钟线和1组时钟线对应连接到开发板的LVDS0接口上：
ORX0- && =&&& LVDS0_TX0_N
ORX0+ & =&&& LVDS0_TX0_P
ORXC- & =& & LVDS0_CLK_N
ORXC+ =& & LVDS0_CLK_P
2） 连接电源、地
<span style="color:# &&& VCC&&&&&&&&&&&&& =&&& 3.3V
<span style="color:#&&&& VCC&&&&& =&&& 3.3V
<span style="color:# & GND&&&&&& =&&& 接地
<span style="color:# &GND&&&&&& =&&&接地
<span style="color:# &GND&&&&&& =&&&接地
<span style="color:# &GND&&&&&& =&&&接地
3） 连接背光
<span style="color:#&&& GND&&&&&& =&&& 接地
<span style="color:#&&& PWM&&&&& =&&& 3V3（背光亮度脉冲输出，前期先接3V3，方便调试）
<span style="color:#&&& LED_EN =& & 3V3（背光使能）
<span style="color:#&&& VLED&&&& =&&& 5V
2.2&&&&驱动移植
1、& 从freescale官网下载【i.MX 6Software Updates and Releases】-&【SABRE Board for Smart Devices】-&【Android 4.2Jellybean】-&【Source Code for i.MX 6Quad/Dual】软件包，即android_jb4.2.2_1.0.0-ga_source，然后参考android_jb4.2.2_1.0.0-ga_source\docs\Android_User_Guide.pdf的步骤下载android-4.2.2_r1源码，以及kernel（版本为3.0.35）和u-boot（版本为2009.08），并打上补丁android_jb4.2.2_1.0.0-ga_source。
2、& 编译android4.2.2源码，lunch选项为【sabresd_6dq-eng】，生成u-boot-6q.bin，boot.img，system.img和recovery.img。
3、& 修改drivers/video/mxc/ldb.c的fb_videomode类型的ldb_modedb变量，把LDB-XGA成员改为：
&LDB-XGA&, 60,, 14430,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,
4、& 重新编译内核uImage，并重新生成boot.image，启动系统，设置u-boot启动参数为：
setenv bootargs console=ttymxc0,115200 init=/initvideo=mxcfb0:dev=ldb,ldb=sin0 video=mxcfb1:off video=mxcfb2:off fbmem=10Mfb0base=0x27b00000 vmalloc=400M androidboot.console=ttymxc0androidboot.hardware=freescale
5、& 系统启动后，屏幕可以点亮并输出图像，但图像效果不好，分辨率不对，显示效果如下：
但系统输出hdmi显示是正常的。
3&&&&&&调试步骤
1、& 去掉u-boot启动参数bootargs中的ldb=sin0，默认显示是sin1，然后把屏幕的数据线接到LVDS1接口上，显示效果相同。
2、& 修改u-boot启动参数：
video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666,bpp=16video=mxcfb1:off video=mxcfb2
video=mxcfb0:dev=ldb, bpp=16 video=mxcfb1:off video=mxcfb2
显示效果仍是一样。
3、& 修改u-boot-imx/board/freescale/mx6q_sabresd.c的lvds_xga变量，使之与kernel的ldb.c里面的fb_videomode相同：
& XGA&, 60,, 14430,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,
编译，重新生成u-boot-6q.bin，启动系统后，显示效果仍是一样。
4、& 改u-boot-imx/board/freescale/mx6q_sabresd.c的lvds_xga变量，使之name成员为LDB-XGA：
& LDB-XGA&,60, , 14430,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,
编译，重新生成u-boot-6q.bin，启动系统后，显示效果仍是一样。
5、因屏幕的色彩数是18位的，在bootargs中添加bpp=18，效果未有改进。
3.1&&&&Android 4.0.4调试
因我之前在sabrelite iMX 6Quad开发板，android 4.0.4调试过相同的屏幕，显示效果是正常的，所以怀疑有可能是系统版本的原因，我按以下步骤在sabre-sd开发板，android 4.0.4上验证显示效果：
1、&&&&&从freescale官网下载imx-android-13.4.1.tar.gz，解压后按里面的文档Android_User_Guide.pdf下载android-4.0.4_r1.1源码，以及kernel（版本为3.0.35）和u-boot（版本为2009.08），并打上补丁imx-android-13.4.1
2、&&&&&修改drivers/video/mxc/ldb.c的fb_videomode类型的ldb_modedb变量，把LDB-XGA成员改为：
&LDB-XGA&, 60,, 14430,
FB_VMODE_NONINTERLACED,
FB_MODE_IS_DETAILED,
3、&&&&&按lunch选项【sabresd_6dq-eng】编译系统，把镜像烧录到sabre-sd开发板上，连接屏幕到lvds1接口，设置u-boot参数为：
setenv bootargs console=ttymxc0,115200 androidboot.console=ttymxc0vmalloc=400M init=/init video=mxcfb0:dev=ldb,LDB-XGA,if=RGB666,bpp=16video=mxcfb1:off video=mxcfb2:off fbmem=10M fb0base=0x27b00000
然后启动系统。
4、&&&&&启动系统后，屏幕显示效果比android 4.2的较好，屏幕分辨率也是对的，显示效果如下：
3.2&&&&解决方法
经过艰苦的调试，终于发现在bootargs中添加bpp=32即可解决问题，完整的bootargs如下：
console=ttymxc0,115200 init=/init video=mxcfb0:dev=ldb,bpp=32 ldb=sin0 video=mxcfb1:off video=mxcfb2:off fbmem=64M vmalloc=400M androiconsole=ttymxc0,115200 init=/init video=mxcfb0:dev=ldb,bpp=32 ldb=sin0 video=mxcfb1:off video=mxcfb2:off fbmem=64M vmalloc=400M androidboot.console=ttymxc0 androidboot.hardware=freescale fb0base=0x27b00000dboot.console=ttymxc0 androidboot.hardware=freescale fb0base=0x27b00000
启动系统后，分辨率、色彩都显示正常。
但仍有疑问，bpp表示像素位数，我的屏幕的bpp是18，用的是3组数据线，为什么是32位呢？
参考知识库
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