/* SDIO接口Wi-Fi专用配置:SDIO接口节点 */&sdio {max-frequency = < 150000000 >; /* sdio接口的最大频率,可调整 */supports-sdio;bus-width = < 4 >; /* 4线模式,可调整1线模式 */disable-wp;cap-sd-highspeed;cap-sdio-irq;keep-power-in-suspend;mmc-pwrseq = < &sdio_pwrseq >;non-removable;num-slots = < 1 >;pinctrl-names = "default";pinctrl-0 = < &sdiom0_pins >;sd-uhs-sdr104; /* 支持SDIO3.0 */status = "okay";};
/* 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 >;clock-names = "ext_clock";pinctrl-names = "default";pinctrl-0 = < &wifi_enable_h >;reset-gpios = < &gpio0 RK_PC4 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*/};/* SDIO接口Wi-Fi专用配置:WIFI_REG_ON脚的pinctrl的配置 */&pinctrl {sdio-pwrseq {wifi_enable_h: wifi-enable-h {rockchip,pins = < 0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none >; /* 对应上面的WIFI_REG_ON,关掉上下拉,防止不能拉高或拉低 */};};}
WIFI节点配置/* Wi-Fi节点 */wireless_wlan: wireless-wlan {compatible = "wlan-platdata";wifi_chip_type = "ap6256"; //模块名称pinctrl-names = "default";pinctrl-0 = < &wifi_host_wake_irq >;WIFI,host_wake_irq = < &gpio0 RK_PB2 GPIO_ACTIVE_HIGH >; //WIFI模块唤醒CPU的//WIFI,poweren_gpio = < &gpio0 RK_PC4 GPIO_ACTIVE_HIGH >; //控制WIFI模块电源的GPIO,配置了sdio_pwrseq就不需要再配置poweren_gpio status = "okay";};
WIFI,host_wake_irq的配置说明:WIFI,host_wake_irq = < &gpio0 RK_PB2 GPIO_ACTIVE_HIGH >; /* WIFI_WAKE_HOST: Wi-Fi中断通知主控的PIN脚。* 特别注意:确认下这个Wi-Fi pin脚跟主控的pin的硬件连接关系,直连的话就是GPIO_ACTIVE_HIGH;* 如果中间加了一个反向管就要改成低电平GPIO_ACTIVE_LOW触发*/
WIFI_WAKE_HOST脚的pinctrl的配置:&pinctrl {wireless-wlan {wifi_host_wake_irq: wifi-host-wake-irq {rockchip,pins = < 0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_down >;};};}/* 注意一般Wi-Fi的wake host pin都是高电平触发,* 所以默认这里要配置为下拉; 如果客户的硬件设计* 是反向的则要改为上拉,总之要初始化为与触发电平* 相反的状态*/
以下UART相关的都要配置为实际使用的UART口的所对应PIN,注意RTS/CTS pin一定要按照SDK设计
接(具体接法参考7.3章节的UART描述),很多客户反馈的异常都是因为这两个PIN脚没有接导致初始化
(资料图)
异常,下面假设蓝牙使用UART4:
bt_uart6: wireless_bluetooth: wireless-bluetooth {compatible = "bluetooth-platdata";clocks = < &hym8563 >; //外部时钟clock-names = "ext_clock"; uart_rts_gpios = < &gpio1 RK_PA2 GPIO_ACTIVE_LOW >; //uart的rts脚pinctrl-names = "default", "rts_gpio";pinctrl-0 = < &uart6m1_rtsn >;pinctrl-1 = < &uart6_gpios >;BT,reset_gpio = < &gpio3 RK_PA6 GPIO_ACTIVE_HIGH >; //蓝牙的复位脚BT,wake_host_irq = < &gpio0 RK_PC5 GPIO_ACTIVE_HIGH >; //蓝牙模块唤醒CPU的GPIOstatus = "okay";};&pinctrl {wireless-bluetooth {uart6_gpios: uart6-gpios {rockchip,pins = < 1 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none >;};};}
蓝牙对应的uart6配置/* 打开对应的UART配置 */&uart6 {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 = < &uart6m1_xfer &uart6m1_ctsn >;status = "okay";};
# Kernel defconfigexport RK_KERNEL_DEFCONFIG=rockchip_linux_defconfig
cd kernelmake ARCH=arm64 menuconfigmake savedefconfig
选择:Device Drivers ---> Network device support ---> Wireless LAN ---> Rockchip Wireless LAN support
Wi-Fi驱动可编译到内核或者ko方式, 切记下面两个配置必须二选一,否则Wi-Fi无法加载!
KO 配置:[* ] build wifi ko modules
CONFIG_WIFI_BUILD_MODULE=y# CONFIG_WIFI_LOAD_DRIVER_WHEN_KERNEL_BOOTUP is not set
buildin 配置:[* ] Wifi load driver when kernel bootup
CONFIG_WIFI_LOAD_DRIVER_WHEN_KERNEL_BOOTUP=y# CONFIG_WIFI_BUILD_MODULE is not set
buildin 只能选择一个型号,realtek 模组和 ap6xxx 模组不能同时选择为y,且realtek的也只能选择其
中一个;
ap6xxx 和 cypress也是互斥的,只能选择一个且如果选择ap6xxx,cypress的配置自动消失,去掉ap
配置,cypress自动出现;
ko方式则可以选择多个Wi-Fi
cd kernelmake ARCH=arm64 menuconfigmake savedefconfig
选择: Networking support ---> Bluetooth subsystem support ---> Bluetooth device drivers
注意:配置完成后要保存到对应的defconfig
external/rkwifibt/firmware/broadcom/AP6256/├── bt│ └── BCM4345C5.hcd└── wifi├── fw_bcm43456c5_ag.bin├── fw_bcm43456c5_ag_mfg.bin└── nvram_ap6256.txt
经过编译规则编译后,对应的文件被拷贝到工程的output目录:(kernel4.19内核由system变更为vendor目录)buildroot/output/rockchip_rk3xxxx/target//system(vendor)/lib/modules/bcmdhd.ko #驱动ko(如果是ko编译的话)/system(vendor)/etc/firmware/fw_bcm43456c5_ag.bin #驱动firmware文件存放位置/system(vendor)/etc/firmware/fw_bcm43456c5_ag_mfg.bin #驱动firmware文件存放位置/system(vendor)/etc/firmware/nvram_ap6256.txt #驱动nvram文件存放位置/system(vendor)/etc/firmware/BCM4345C5.hcd #蓝牙firmware文件(如果有蓝牙功能)
最终烧录到机器中后,Wi-Fi运行时所需的文件及存放位置:/system(vendor)/lib/modules/bcmdhd.ko #驱动ko(如果是ko编译的话)/system(vendor)/etc/firmware/fw_bcm43456c5_ag.bin #驱动firmware文件存放位置/system(vendor)/etc/firmware/fw_bcm43456c5_ag_mfg.bin #驱动firmware文件存放位置/system(vendor)/etc/firmware/nvram_ap6256.txt #驱动nvram文件存放位置/system(vendor)/etc/firmware/BCM4345C5.hcd #蓝牙firmware文件(如果有蓝牙功能)
# Define WiFi BT chip# Compatible with Realtek and AP6XXX WiFi : RK_WIFIBT_CHIP=ALL_AP# Compatible with Realtek and CYWXXX WiFi : RK_WIFIBT_CHIP=ALL_CY# Single WiFi configuration: AP6256 or CYW43455: RK_WIFIBT_CHIP=AP6256export RK_WIFIBT_CHIP=ALL_AP# Define BT ttySXexport RK_WIFIBT_TTY=ttyS6
审核编辑:汤梓红
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