WIFI驱动开发
Linux 4.9 内核驱动移植
Linux 4.9 BSP 内核驱动
下载驱动后获得驱动的 tar.gz 压缩包
解压后找到如下驱动与文件夹
进入内核，找到 linux-4.9/drivers/net/wireless 文件夹中，新建文件夹aic8800 并且把上面的驱动与文件夹放入刚刚创建好的 aic8800 中。
修改 linux-4.9/drivers/net/wireless/Kconfig ，增加一行
source "drivers/net/wireless/aic8800/Kconfig"
修改 linux-4.9/drivers/net/wireless/Makefile ，增加一行
obj-$(CONFIG_AIC_WLAN_SUPPORT) += aic8800/
进入内核配置页，找到并勾选如下选项。
Device Drivers --->[*] Network device support --->[*] Wireless LAN --->[*] AIC wireless SupportEnable Chip Interface (SDIO interface support) ---><M> AIC8800 wlan Support<M> AIC8800 bluetooth Support (UART)
编译后可以找到对应的驱动程序
其加载顺序是
insmod aic8800_bsp.ko
insmod aic8800_fdrv.ko
insmod aic8800_btlpm.ko
Linux 4.9 BSP 内核设备树
设备树配置如下，参考电路原理图，REG_ON 为 PE6，HOSTWAKE 为 PE7
wlan: wlan@0 {compatible = "allwinner,sunxi-wlan";pinctrl-names = "default";clock-names = "32k-fanout0";clocks = <&clk_fanout0>;wlan_busnum = <0x1>;wlan_regon = <&pio PE 6 1 0x1 0x2 0>;wlan_hostwake = <&pio PE 7 14 0x1 0x2 0>;chip_en;power_en;status = "okay";wakeup-source;
};
Tina SDK 移植
Tina SDK 基于OpenWrt 提供了一些自动化方案，可以参考 OpenWrt 的方法来移植这些驱动。
WIFI 固件移植
下载得到 aic8800-firmware.tar.gz 这里面包含着 WIFI 使用的固件
!> 注意，如果您的WIFI模块是 AIC8800D80 请下载 AIC8800D80 的固件（2024年4月后 WIFI 模块均升级为 AIC8800D80 模块）
解压后拷贝到 openwrt/openwrt/package/firmware/linux-firmware/aic8800 即可（Tina 5.0已经内置，客服给的4.0才需要这样）
然后找到 target/allwinner/v851se-common/modules.mk 文件，在末尾添加如下内容
define KernelPackage/net-aic8800SUBMENU:=$(WIRELESS_MENU)TITLE:=aic8800 support (staging)DEPENDS:=+@IPV6 +@USES_AICSEMIKCONFIG:=\CONFIG_AIC8800_BTLPM_SUPPORT=m \CONFIG_AIC8800_WLAN_SUPPORT=m \CONFIG_AIC_WLAN_SUPPORT=m \CONFIG_PM=y \CONFIG_RFKILL=y \CONFIG_RFKILL_PM=y \CONFIG_RFKILL_GPIO=yFILES+=$(LINUX_DIR)/drivers/net/wireless/aic8800/aic8800_bsp/aic8800_bsp.koFILES+=$(LINUX_DIR)/drivers/net/wireless/aic8800/aic8800_btlpm/aic8800_btlpm.koFILES+=$(LINUX_DIR)/drivers/net/wireless/aic8800/aic8800_fdrv/aic8800_fdrv.koAUTOLOAD:=$(call AutoProbe,aic8800_bsp aic8800_btlpm aic8800_fdrv)
endefdefine KernelPackage/net-aic8800/descriptionKernel modules for aic8800 support
endef$(eval $(call KernelPackage,net-aic8800))
通过这些内容可以使 Tina 自动去内核文件夹将 ko 打包进文件系统。
配置自动装载模块
修改文件：target/allwinner/v851se-tinyvision/busybox-init-base-files/etc/init.d/rc.modules 增加如下内容，每次开机的时候就会自动装载模块
#!/bin/sh
insmod /lib/modules/4.9.191/aic8800_bsp.ko
insmod /lib/modules/4.9.191/aic8800_fdrv.ko
insmod /lib/modules/4.9.191/aic8800_btlpm.ko
配置网络进程
新建文件 target/allwinner/v851se-tinyvision/busybox-init-base-files/etc/init.d/S50wifidaemon 写入如下内容，每次开机装载模块后便初始化WIFI和配置WIFI模式
#!/bin/sh
#
# Start wifi_daemon....
#start() {printf "Starting wifi_daemon....: "wifi_daemonsleep 2wifi -o sta
}stop() {printf "Stopping wifi_daemon: "
}case "$1" instart)start;;stop)stop;;restart|reload)stopstart;;*)echo "Usage: $0 {start|stop|restart}"exit 1
esacexit $?
配置 WIFI 固件
进入 Tina 配置页面，打开如下功能
Allwinner --->Wireless ---><*> wifimanager-v2.0................................... Tina wifimanager-v2.0-*- wirelesscommon............................. Allwinner Wi-Fi/BT Public libFirmware ---> <*> aic8800-firmware.................................... AIC aic8800 firmwareKernel modules --->Wireless Drivers ---><*> kmod-net-aic8800............................... aic8800 support (staging)
测试
上电启动，可以看到 LOG 正常挂载 WIFI
可以看到正常初始化进程
Linux 5.15 内核驱动移植
Linux 5.15 内核驱动
下载驱动后获得驱动的 tar.gz 压缩包
解压后找到如下驱动与文件夹
由于 Linux 5.15 需要保证内核的主线化，不可将非主线的第三方驱动放置于内核文件夹中，所以将驱动放置于 bsp 文件夹中。
进入bsp，找到 bsp/drivers/net/wireless 文件夹中，新建文件夹aic8800 并且把上面的驱动与文件夹放入刚刚创建好的 aic8800 中。
修改 bsp/drivers/net/wireless/Kconfig ，增加一行
source "bsp/drivers/net/wireless/aic8800/Kconfig"
修改 bsp/drivers/net/wireless/Makefile ，增加一行
obj-$(CONFIG_AIC_WLAN_SUPPORT) += aic8800/
修改 bsp/drivers/net/wireless/aic8800/Kconfig，修改为 bsp 的索引
if AIC_WLAN_SUPPORT
source "bsp/drivers/net/wireless/aic8800/aic8800_fdrv/Kconfig"
source "bsp/drivers/net/wireless/aic8800/aic8800_btlpm/Kconfig"
endifif AIC_INTF_USB
source "bsp/drivers/net/wireless/aic8800/aic8800_btusb/Kconfig"
endif
进入内核配置页，找到并勾选如下选项。
[*] Networking support ---><*> Bluetooth subsystem support --->[*] Bluetooth Classic (BR/EDR) features (NEW)<*> RFCOMM protocol support[*] RFCOMM TTY support[*] Bluetooth Low Energy (LE) features[*] Export Bluetooth internals in debugfsBluetooth device drivers ---><*> HCI UART driver[*] UART (H4) protocol support-*- Wireless ---><*> cfg80211 - wireless configuration API[ ] nl80211 testmode command[ ] enable developer warnings[ ] cfg80211 certification onus[*] enable powersave by default[ ] cfg80211 DebugFS entries[*] support CRDA[*] cfg80211 wireless extensions compatibility <*> Generic IEEE 802.11 Networking Stack (mac80211)<*> RF switch subsystem support --->[*] RF switch input support<*> GPIO RFKILL driverDevice Drivers --->Network device support --->[*] Wireless LAN --->[*] AIC wireless SupportEnable Chip Interface (SDIO interface support) ---><M> AIC8800 wlan Support<M> AIC8800 bluetooth Support (UART)Misc Devices Drivers ---><*> Allwinner rfkill driver<*> Allwinner Network MAC Addess Manager
Linux 5.15 内核设备树
&rfkill {compatible = "allwinner,sunxi-rfkill";chip_en;power_en;pinctrl-0;pinctrl-names;status = "okay";/* wlan session */wlan {compatible = "allwinner,sunxi-wlan";wlan_busnum = <0x1>;wlan_regon = <&pio PE 6 GPIO_ACTIVE_HIGH>;wlan_hostwake = <&pio PE 7 GPIO_ACTIVE_HIGH>;wakeup-source;};/* bt session */bt {compatible = "allwinner,sunxi-bt";bt_rst_n = <&pio PE 8 GPIO_ACTIVE_LOW>;};
};&addr_mgt {compatible = "allwinner,sunxi-addr_mgt";type_addr_wifi = <0x0>;type_addr_bt = <0x0>;type_addr_eth = <0x0>;status = "okay";
};&btlpm {compatible = "allwinner,sunxi-btlpm";uart_index = <0x2>;bt_wake = <&pio PE 9 GPIO_ACTIVE_HIGH>;bt_hostwake = <&pio PE 10 GPIO_ACTIVE_HIGH>; /* unused */wakeup-source;status = "okay";
};
编译时可以看到生成的对应的 ko 模块
测试
由于 Linux 5.15 不绑定 Tina，所以这里直接使用现成的 debian rootfs 来做测试。
使用上面编译出来的内核与ko驱动，并且将固件放置于 rootfs 对应的 /lib/firmware/ 文件夹中