WIFI驱动开发
TinyVision 使用GPIO引出WIFI模块，配套的WIFI模块主控芯片为 AIC8800D80文章中的资源下下载地址：https://github.com/YuzukiHD/YuzukiHD.github.io/releases/tag/20240112
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-$(CONFIG_AIC_WLAN_SUPPORT) += aic8800/
进入内核配置页，找到并勾选如下选项。
Device Drivers --->
[*] Network device support --->
[*] Wireless LAN --->
[*] AIC wireless Support
Enable Chip Interface (SDIO interface support) --->
<M> AIC8800 wlan Support
<M> AIC8800 bluetooth Support (UART)
编译后可以找到对应的驱动程序
其加载顺序是
insmod aic8800_bsp.ko
insmod aic8800_fdrv.ko
insmod aic8800_btlpm.ko
Linux 4.9 BSP 内核设备树
设备树配置如下，参考电路原理图，REG_ON 为 PE6，HOSTWAKE 为 PE7
wlan: wlan@0 {
compatible = "allwinner,sunxi-wlan";
pinctrl-names = "default";
clock-names = "32k-fanout0";
clocks = <&clk_fanout0>;
wlan_busnum = <0x1>;
wlan_regon = <&pio PE 6 1 0x1 0x2 0>;
wlan_hostwake = <&pio PE 7 14 0x1 0x2 0>;
chip_en;
power_en;
status = "okay";
wakeup-source;
};
Tina SDK 移植
Tina SDK 基于OpenWrt 提供了一些自动化方案，可以参考 OpenWrt 的方法来移植这些驱动。
WIFI 固件移植
下载得到 aic8800-firmware.tar.gz 这里面包含着 WIFI 使用的固件
!> 注意，如果您的WIFI模块是 AIC8800D80 请下载 AIC8800D80 的固件（2024年4月后 WIFI 模块均升级为 AIC8800D80 模块）
解压后拷贝到 openwrt/openwrt/package/firmware/linux-firmware/aic8800 即可（Tina 5.0已经内置，客服给的4.0才需要这样）
然后找到 target/allwinner/v851se-common/modules.mk 文件，在末尾添加如下内容
define KernelPackage/net-aic8800
SUBMENU:=$(WIRELESS_MENU)
TITLE:=aic8800 support (staging)
DEPENDS:=+@IPV6 +@USES_AICSEMI
KCONFIG:=\
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=y
FILES+=$(LINUX_DIR)/drivers/net/wireless/aic8800/aic8800_bsp/aic8800_bsp.ko
FILES+=$(LINUX_DIR)/drivers/net/wireless/aic8800/aic8800_btlpm/aic8800_btlpm.ko
FILES+=$(LINUX_DIR)/drivers/net/wireless/aic8800/aic8800_fdrv/aic8800_fdrv.ko
AUTOLOAD:=$(call AutoProbe,aic8800_bsp aic8800_btlpm aic8800_fdrv)
endef
define KernelPackage/net-aic8800/description
Kernel 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_daemon
sleep 2
wifi -o sta
}
stop() {
printf "Stopping wifi_daemon: "
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart|reload)
stop
start
;;
*)
echo "Usage: $0 {start|stop|restart}"
exit 1
esac
exit $?
配置 WIFI 固件
进入 Tina 配置页面，打开如下功能
Allwinner --->
Wireless --->
<*> wifimanager-v2.0................................... Tina wifimanager-v2.0
-*- wirelesscommon............................. Allwinner Wi-Fi/BT Public lib
Firmware --->
<*> aic8800-firmware.................................... AIC aic8800 firmware
Kernel modules --->
Wireless Drivers --->
<*> kmod-net-aic8800............................... aic8800 support (staging)
测试
上电启动，可以看到 LOG 正常挂载 WIFI
可以看到正常初始化进程
Linux 5.15 内核驱动移植
Linux 5.15 内核驱动
下载驱动后获得驱动的 tar.gz 压缩包
解压后找到如下驱动与文件夹
由于 Linux 5.15 需要保证内核的主线化，不可将非主线的第三方驱动放置于内核文件夹中，所以将驱动放置于 bsp 文件夹中。
进入bsp，找到 bsp/drivers/net/wireless 文件夹中，新建文件夹aic8800 并且把上面的驱动与文件夹放入刚刚创建好的 aic8800 中。
修改 bsp/drivers/net/wireless/Kconfig ，增加一行
source "bsp/drivers/net/wireless/aic8800/Kconfig"
修改 bsp/drivers/net/wireless/Makefile ，增加一行
obj-$(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"
endif
if 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 debugfs
Bluetooth 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 driver
Device Drivers --->
Network device support --->
[*] Wireless LAN --->
[*] AIC wireless Support
Enable 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
