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前言
最近在搞广告机项目，用到RTL8852BS的模块，发现这个模块的相关文章比较少（大多都是AP的），虽然wifi-bt的调试都差不多，但是还是想记录一下调试的过程，做一下总结，如有错误之处，还望各位大佬指教！
平台：RK3588 & Android13 & kernel-5.10
模块芯片：RTL8852BS
接口：SDIO & UART
内容：调试RTL8852BS模块的WiFi以及BT功能
一、WIFI
1. dst配置
调试的第一步，先根据原理图配置dts，让sdio可以扫描到模块，部分原理图如下：
sdio及wifi节点的相关配置
/* SDIO接口Wi-Fi专用配置： WIFI_REG_ON: Wi-Fi的电源使能PIN脚 */ sdio_pwrseq: sdio-pwrseq { compatible = "mmc-pwrseq-simple"; clocks = <&hym8563>; // 外部时钟，蓝牙需要 clock-names = "ext_clock"; pinctrl-names = "default"; pinctrl-0 = <&wifi_enable_h>; reset-gpios = <&gpio2 RK_PB5 GPIO_ACTIVE_LOW>; /*跟电源使能状态恰好相反：高有效为LOW，低有效则为HIGH。切记：这个配置跟下面的WIFI,poweren_gpio是互斥的，不能同时配置！！！*/ /*特别注意：reset-gpios的GPIO_ACTIVE 配置跟poweren_gpio配置的电源使能状态恰好是相反的*/ }; /* Wi-Fi节点 */ wireless_wlan: wireless-wlan { compatible = "wlan-platdata"; wifi_chip_type = "rtl8852bs"; pinctrl-names = "default"; pinctrl-0 = <&wifi_host_wake_irq>; WIFI,host_wake_irq = <&gpio2 RK_PB4 GPIO_ACTIVE_HIGH>; //WIFI,poweren_gpio = <&gpio2 RK_PB5 GPIO_ACTIVE_HIGH>; status = "okay"; }; &sdio { max-frequency = <100000000>;/* sdio接口的最大频率,可调整 */ supports-sdio; bus-width = <4>;/* 4线模式 */ disable-wp; cap-sd-highspeed; cap-sdio-irq; keep-power-in-suspend; mmc-pwrseq = <&sdio_pwrseq>; non-removable; num-slots = <1>; rockchip,default-sample-phase = <90>; pinctrl-names = "default"; pinctrl-0 = <&sdiom0_pins>; sd-uhs-sdr50; sd-uhs-sdr104;/* 支持SDIO3.0 */ status = "okay"; }; /* SDIO接口Wi-Fi专用配置：WIFI_REG_ON脚的pinctrl的配置 */ /* WIFI_WAKE_HOST脚的pinctrl的配置 */ &pinctrl { sdio-pwrseq { wifi_enable_h: wifi-enable-h { rockchip,pins = /* 对应上面的WIFI_REG_ON，关掉上下拉，防止不能拉高或拉低 */ <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>; }; }; wireless-wlan { wifi_host_wake_irq: wifi-host-wake-irq { rockchip,pins = <2 RK_PB4 RK_FUNC_GPIO &pcfg_pull_down>; }; }; };理论上配好这些以后sdio就能扫到模块了，可以这样查看
console:/ # ls /sys/bus/sdio/devices/ mmc0:0001:1 还可以查看模块的pid 以及 vid，后续加载对应驱动需要用
console:/ # cat /sys/bus/sdio/devices/mmc0\:0001\:1/uevent DRIVER=rtl8852bs SDIO_CLASS=07 SDIO_ID=024C:B852 SDIO_REVISION=0.0 MODALIAS=sdio:c07v024CdB852 2. 驱动移植
sdio扫到设备以后下一步就是移植驱动，这个很简单，把驱动添加到源码根目录下的
external/wifi_driver 然后修改Makefile编译驱动即可，仿照已适配的模块去改；需要注意的是，驱动里面的Makefile文件也需要修改，改到RK平台，具体可以参考这篇博客驱动编译报错相关章节
RK3588 & Android12 调试 RTL8852BE（wifi篇）_rk3588 android12调试rtl8852bs-CSDN博客
3. framework层修改
驱动移植成功以后，下一步就需要让系统去加载对应的驱动，主要修改framework的一些文件，具体参考下面这篇博客
RK3588 & Android12 调试 RTL8852BE（wifi篇）_rk3588 android12调试rtl8852bs-CSDN博客
到这里WiFi功能理论上就可以使用了
二、蓝牙
1. dts配置
/* 蓝牙节点 */ /* 注意下面关于UART的配置：uart9_xfer/uart9_rts/uart9_ctsn * 每个平台的名字可能不一样，要在对应芯片平台的dts/dtsi里面找下对 * 应的uart写法，比如uart9_ctsn有些平台的名字为uart9_cts. */ wireless_bluetooth: wireless-bluetooth { compatible = "bluetooth-platdata"; //clocks = <&hym8563>; //时钟在sdio_pwrseq里面配置了这里就不要重复配置 clock-names = "ext_clock"; /* 这里要配置对应主控UART的RTS脚 */ uart_rts_gpios = <&gpio4 RK_PC4 GPIO_ACTIVE_LOW>; pinctrl-names = "default", "rts_gpio"; pinctrl-0 = <&uart9m0_rtsn>, <&bt_reset_gpio>, <&bt_irq_gpio>; pinctrl-1 = <&uart9_gpios>; /* BT_REG_ON 蓝牙电源的开关 */ BT,reset_gpio = <&gpio2 RK_PB6 GPIO_ACTIVE_HIGH>; //BT,wake_gpio = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>; BT,wake_host_irq = <&gpio2 RK_PC1 GPIO_ACTIVE_HIGH>; status = "okay"; }; /* 打开对应的UART配置 */ &uart9 { status = "okay"; pinctrl-names = "default"; /* 这里配置对应主控UART的TX/RX/CTS PIN ，不要配置RTS PIN*/ pinctrl-0 = <&uart9m0_xfer &uart9m0_ctsn>; }; /* uart9_rts_gpio */ wireless-bluetooth { uart9_gpios: uart9-gpios { rockchip,pins = <4 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>; }; bt_reset_gpio: bt-reset-gpio { rockchip,pins = <2 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>; }; bt_irq_gpio: bt-irq-gpio { rockchip,pins = <2 RK_PC1 RK_FUNC_GPIO &pcfg_pull_none>; }; }; 配置完这些，dts部分就完成了，理论上dev下面会生成对应的uart设备文件
console:/ # ls /dev/ttyS* /dev/ttyS7 /dev/ttyS9 2. hardware配置
2.1添加蓝牙固件文件
rk3588_an13/hardware/realtek/rtkbt/vendor/firmware$ git status . On branch Your branch is up to date with Changes to be committed: (use "git reset HEAD <file>..." to unstage) modified: BT_Firmware.mk Untracked files: (use "git add <file>..." to include in what will be committed) rtl8852bs_config rtl8852bs_fw 对应mk文件修改如下，其实就是为了编译的时候copy蓝牙固件文件到系统对应位置
diff --git a/rk3588_an13/hardware/realtek/rtkbt/vendor/firmware/BT_Firmware.mk b/rk3588_an13/hardware/realtek/rtkbt/vendor/firmware/BT_Firmware.mk index 5d4f87b135d..cc515fb6e2a 100755 --- a/rk3588_an13/hardware/realtek/rtkbt/vendor/firmware/BT_Firmware.mk +++ b/rk3588_an13/hardware/realtek/rtkbt/vendor/firmware/BT_Firmware.mk @@ -65,3 +65,5 @@ PRODUCT_COPY_FILES += \ $(LOCAL_PATH)/Firmware/BT/rtl8852as_fw:$(TARGET_COPY_OUT_VENDOR)/firmware/rtl8852as_fw \ $(LOCAL_PATH)/Firmware/BT/rtl8852au_config:$(TARGET_COPY_OUT_VENDOR)/firmware/rtl8852au_config \ $(LOCAL_PATH)/Firmware/BT/rtl8852au_fw:$(TARGET_COPY_OUT_VENDOR)/firmware/rtl8852au_fw \ + $(LOCAL_PATH)/Firmware/BT/rtl8852bs_config:$(TARGET_COPY_OUT_VENDOR)/firmware/rtl8852bs_config \ + $(LOCAL_PATH)/Firmware/BT/rtl8852bs_fw:$(TARGET_COPY_OUT_VENDOR)/firmware/rtl8852bs_fw \ 注：如果嫌麻烦，直接把蓝牙固件文件丢到vendor/rockchip/common/wifi/firmware/也行
2.2 指定UART
蓝牙固件文件加入以后，还要指定蓝牙使用的UART，patch如下：
hardware：
rk3588_an13/hardware$ git diff . diff --git a/rk3588_an13/hardware/broadcom/libbt/include/vnd_rksdk.txt b/rk3588_an13/hardware/broadcom/libbt/include/vnd_rksdk.txt old mode 100644 new mode 100755 index 7d3f8104d0c..bf0c98b69ce --- a/rk3588_an13/hardware/broadcom/libbt/include/vnd_rksdk.txt +++ b/rk3588_an13/hardware/broadcom/libbt/include/vnd_rksdk.txt @@ -1,4 +1,4 @@ -BLUETOOTH_UART_DEVICE_PORT = "/dev/ttyS0" +BLUETOOTH_UART_DEVICE_PORT = "/dev/ttyS9" FW_PATCHFILE_LOCATION = "/vendor/etc/firmware/" VENDOR_LIB_CONF_FILE = "/vendor/etc/bluetooth/bt_vendor.conf" UART_TARGET_BAUD_RATE = 1500000 diff --git a/rk3588_an13/hardware/broadcom/libbt/src/hardware.c b/rk3588_an13/hardware/broadcom/libbt/src/hardware.c old mode 100644 new mode 100755 diff --git a/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt.conf b/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt.conf index a1e9b393613..3f2bbffd259 100755 --- a/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt.conf +++ b/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt.conf @@ -9,7 +9,7 @@ DevClassMinorClass=0x1C #Indicate USB or UART driver bluetooth #BtDeviceNode=/dev/rtkbt_dev -BtDeviceNode=?/dev/ttyS1:H5 +BtDeviceNode=?/dev/ttyS9:H5 # BtSnoop log output file BtSnoopFileName=/data/misc/bluedroid/btsnoop_hci.cfa diff --git a/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt_S0.conf b/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt_S0.conf index 87a8241f179..bb13aea7240 100755 --- a/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt_S0.conf +++ b/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt_S0.conf @@ -9,7 +9,7 @@ DevClassMinorClass=0x1C #Indicate USB or UART driver bluetooth #BtDeviceNode=/dev/rtk_btusb -BtDeviceNode=?/dev/ttyS0:H5 +BtDeviceNode=?/dev/ttyS9:H5 # Enable BtSnoop logging function # valid value : true, false device：
/rk3588_an13/device/rockchip/rk3588/rk3588_t$ git diff . diff --git a/rk3588_an13/device/rockchip/rk3588/rk3588_t/bt_vendor.conf b/rk3588_an13/device/rockchip/rk3588/rk3588_t/bt_vendor.conf old mode 100644 new mode 100755 index d98c62e94fe..793e90a39f7 --- a/rk3588_an13/device/rockchip/rk3588/rk3588_t/bt_vendor.conf +++ b/rk3588_an13/device/rockchip/rk3588/rk3588_t/bt_vendor.conf @@ -1,5 +1,5 @@ # UART device port where Bluetooth controller is attached -UartPort = /dev/ttyS8 +UartPort = /dev/ttyS9 # Firmware patch file location FwPatchFilePath = /vendor/etc/firmware/ 到这里，蓝牙功能的配置就完成了，理论上蓝牙就能用了！
三、遇到的问题
3.1 sdio扫不到模块
在根据如上步骤配置完成以后，sdio居然没有扫描到模块！后检查发现原因是硬件将clk和cmd搞反了！
最后交叉飞线就可以了，所以一定要仔细对每一个引脚，确认硬件无误！
3.2. 蓝牙打不开
点击开启蓝牙以后logcat会有如下信息
04-18 09:08:43.572 5657 5657 I bt_userial_vendor: userial vendor open: opening /dev/ttyS1 04-18 09:08:43.572 5657 5657 E bt_userial_vendor: userial vendor open: unable to open /dev/ttyS1原因就是蓝牙使用的uart没有指定对！按照上面第二节的2.2修改就好了
四、小结
wifi配置主要就是：sdio -> WIFI_REG_ON -> 驱动移植 -> 加载驱动
bt配置主要就是：clock -> BT_REG_ON -> uart -> 固件文件移植 -> 加载固件文件
都是一些简单的东西。
五、参考文章
【RK3588 开发笔记——wifi蓝牙调试】_rk3588 wifi-CSDN博客
Rockchip Android13 x3588蓝牙wifi/bt调试心得_android13 wifi唤醒-CSDN博客
六、资料包
链接：https://pan.baidu.com/s/1uOC6MVjQibJwHvq9R_1hXQ 提取码：wh8s