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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

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解压后找到如下驱动与文件夹

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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。

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修改 bsp/drivers/net/wireless/Kconfig ,增加一行

source "bsp/drivers/net/wireless/aic8800/Kconfig"

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修改 bsp/drivers/net/wireless/Makefile ,增加一行

obj-$(CONFIG_AIC_WLAN_SUPPORT) += aic8800/

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修改 bsp/drivers/net/wireless/aic8800/Kconfig,修改为 bsp 的索引

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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

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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