/* SDIO接口Wi-Fi专用配置【zhì】:SDIO接【jiē】口节点 */&sdio {max-frequency = < 150000000 >; /* sdio接口的【de】最大频率,可调【diào】整【zhěng】 */supports-sdio;bus-width = < 4 >; /* 4线模式,可【kě】调整【zhěng】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【yuán】使【shǐ】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【diàn】源使能状态恰好相反:高有【yǒu】效为LOW,低有效【xiào】则为HIGH。切记【jì】:这个配置跟下面的【de】WIFI,poweren_gpio是【shì】互斥的,不能同时配置!!!*/ /*特别注意:reset-gpios的GPIO_ACTIVE 配置【zhì】跟poweren_gpio配置【zhì】的电【diàn】源使能状态恰好【hǎo】是相反的*/};/* SDIO接口【kǒu】Wi-Fi专【zhuān】用配【pèi】置:WIFI_REG_ON脚的pinctrl的配置【zhì】 */&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【de】WIFI_REG_ON,关【guān】掉【diào】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【kuài】电源的GPIO,配置了【le】sdio_pwrseq就【jiù】不需【xū】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【zhù】意【yì】:确【què】认下这个【gè】Wi-Fi pin脚跟主控的pin的硬件连接关系,直连的话【huà】就是【shì】GPIO_ACTIVE_HIGH;* 如【rú】果【guǒ】中间加了一个【gè】反向【xiàng】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【gāo】电【diàn】平【píng】触发,* 所以默认这【zhè】里【lǐ】要配置为下拉; 如果客户【hù】的硬件设【shè】计* 是反【fǎn】向的【de】则要改为【wéi】上拉,总之要【yào】初始化为与触发电【diàn】平* 相反的状【zhuàng】态*/
以下【xià】UART相【xiàng】关的都【dōu】要配置为实际使用的UART口的所【suǒ】对应【yīng】PIN,注【zhù】意【yì】RTS/CTS pin一定要按照SDK设计
接(具体接法参考【kǎo】7.3章节的UART描述),很多客户【hù】反【fǎn】馈的异常【cháng】都是因为这两【liǎng】个PIN脚没有接【jiē】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【fù】位脚BT,wake_host_irq = < &gpio0 RK_PC5 GPIO_ACTIVE_HIGH >; //蓝【lán】牙模块唤【huàn】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【kāi】对应的UART配置 */&uart6 {pinctrl-names = "default";/* 这里【lǐ】配置对应主控UART的TX/RX/CTS PIN ,不【bú】要【yào】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【qiē】记下面两个配置【zhì】必须二选一,否则Wi-Fi无【wú】法【fǎ】加【jiā】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【zhī】能【néng】选择一个【gè】型号,realtek 模组和 ap6xxx 模组不【bú】能【néng】同时选择为y,且realtek的【de】也只能选择其
中一个;
ap6xxx 和 cypress也是【shì】互斥的【de】,只能选择一个且如果选择ap6xxx,cypress的配置自【zì】动【dòng】消失,去掉【diào】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【duì】应的【de】文件被拷贝到工程的output目录:(kernel4.19内【nèi】核由【yóu】system变更为【wéi】vendor目录)buildroot/output/rockchip_rk3xxxx/target//system(vendor)/lib/modules/bcmdhd.ko #驱【qū】动ko(如果是ko编【biān】译【yì】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【zhì】/system(vendor)/etc/firmware/nvram_ap6256.txt #驱动nvram文件【jiàn】存放位置【zhì】/system(vendor)/etc/firmware/BCM4345C5.hcd #蓝牙firmware文件【jiàn】(如果有蓝【lán】牙功能【néng】)
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【rú】果是ko编译的话【huà】)/system(vendor)/etc/firmware/fw_bcm43456c5_ag.bin #驱动firmware文【wén】件存【cún】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【yá】firmware文【wén】件(如【rú】果【guǒ】有蓝牙【yá】功能【néng】)
# 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