RK3588 & Android13 调试RTL8852BS（WIFI&BT）

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 = ; // 外部时钟，蓝牙需要clock-names = "ext_clock";pinctrl-names = "default";pinctrl-0 = ;reset-gpios = ;  /*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,poweren_gpio = ;status = "okay";};&sdio {max-frequency = ;/* sdio接口的最大频率,可调整 */supports-sdio;bus-width = ;/* 4线模式 */disable-wp;cap-sd-highspeed;cap-sdio-irq;keep-power-in-suspend;mmc-pwrseq = ;non-removable;num-slots = ;rockchip,default-sample-phase = ;  pinctrl-names = "default";pinctrl-0 = ;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 */;};};    wireless-wlan {wifi_host_wake_irq: wifi-host-wake-irq {rockchip,pins = ;};};};

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=rtl8852bsSDIO_CLASS=07SDIO_ID=024C:B852SDIO_REVISION=0.0MODALIAS=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 = ;    //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 = ;pinctrl-names = "default", "rts_gpio";pinctrl-0 = , , ;pinctrl-1 = ;        /* BT_REG_ON 蓝牙电源的开关 */BT,reset_gpio    = ;//BT,wake_gpio     = ;BT,wake_host_irq = ;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 = ;};/* uart9_rts_gpio */wireless-bluetooth {uart9_gpios: uart9-gpios {rockchip,pins = ;};bt_reset_gpio: bt-reset-gpio {rockchip,pins = ;};bt_irq_gpio: bt-irq-gpio {rockchip,pins = ;};};

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 ..." to unstage)modified:   BT_Firmware.mkUntracked files:  (use "git add ..." to include in what will be committed)rtl8852bs_configrtl8852bs_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.mkindex 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.txtold mode 100644new mode 100755index 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 = 1500000diff --git a/rk3588_an13/hardware/broadcom/libbt/src/hardware.c b/rk3588_an13/hardware/broadcom/libbt/src/hardware.cold mode 100644new mode 100755diff --git a/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt.conf b/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt.confindex 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.cfadiff --git a/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt_S0.conf b/rk3588_an13/hardware/realtek/rtkbt/vendor/etc/bluetooth/rtkbt_S0.confindex 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.confold mode 100644new mode 100755index 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/ttyS104-18 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