相关参考
【迅为iMX6Q】开发板 u-boot .04 SD卡 启动
【迅为iMX6Q】开发板 u-boot .04 SD卡 启动
【迅为iMX6Q】开发板 u-boot .04 SD卡 启动
开发环境
win10 64位
VMware Workstation Pro 16
ubuntu 22.04
【迅为imx6q】开发板， 2G DDR
目标
调通 u-boot 下的 以太网驱动，通过迅为imx6q 开发板原理图，发现以太网 PHY 使用的是：RTL8211E适配方法
u-boot .04 board 适配，源自board/freescale/mx6sabresd/，默认以太网 PHY 不是 RTL8211E，而是ATHEROS的AR8031
所以开机后， u-boot 打印提示找不到 PHY， 信息如：Net: Could not get PHY for FEC0: addr 0
U-Boot .04-00020-ga68db489ce (Jan 08 - 21:44:16 +0800)CPU: i.MX6Q rev1.3 996 MHz (running at 792 MHz)CPU: Extended Commercial temperature grade (-20C to 105C) at 32CReset cause: PORModel: i.MX6 Quad Topeet Smart Device BoardBoard: MX6-topeetDRAM: 2 GiBMMC: FSL_SDHC: 1, FSL_SDHC: 2, FSL_SDHC: 3Loading Environment from MMC... OKNo panel detected: default to Hannstar-XGADisplay: Hannstar-XGA (1024x768)In: serialOut: serialErr: serialflash target is MMC:1Net: Could not get PHY for FEC0: addr 0Could not get PHY for FEC0: addr 0No ethernet found.Fastboot: NormalNormal BootHit any key to stop autoboot: 0
更改 PHY 的型号，可以通过 menuconfig 配置，当前直接在 头文件include/configs/mx6sabre_common.h中定义了#define CONFIG_PHY_ATHEROS
修改一、增加 mx6q_topeet_common.h
复制一份include/configs/mx6sabre_common.h为include/configs/mx6q_topeet_common.h修改二、mx6q_topeet.h
include/configs/mx6q_topeet.h，更改包含的头文件：#include "mx6sabre_common.h"改为#include "mx6q_topeet_common.h"修改三、增加RTL8211E 驱动宏定义
修改include/configs/mx6q_topeet_common.h，#define CONFIG_PHY_ATHEROS改为#define CONFIG_PHY_REALTEK
新增#define CONFIG_FEC_MXC_PHYADDR 0
修改四、 增加PHY 复位的 delay
经过测试，发现以上修改 PHY 型号后，以太网驱动依旧提示找不到 PHY，需要修改设备树文件，增加 phy 复位的 delay
修改arch/arm/dts/imx6qdl-topeet.dtsi，如下
&fec {pinctrl-names = "default";pinctrl-0 = <&pinctrl_enet>;phy-mode = "rgmii";phy-reset-gpios = <&gpio1 25 GPIO_ACTIVE_LOW>;phy-reset-duration = <10>;phy-reset-post-delay = <100>;fsl,magic-packet;status = "okay";};
也就是在@fec设备树节点，增加
phy-reset-duration = <10>;phy-reset-post-delay = <100>;
重新配置并编译
重新配置并编译 u-boot，烧写到 sd 卡中验证
make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabihf- mx6q_topeet_defconfig
make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabihf- -j4
通过 ubuntu 烧写到 sd 卡中
sudo dd if=u-boot-dtb.imx of=/dev/sdc bs=512 seek=2 && sync，注意/dev/sdc是 sd 卡在 ubuntu 下识别的设备，可能不一样，不要搞错
启动信息
第一次启动 u-boot 后，需要设置一些 env 网络相关的参数，开发板需要通过网线，连接到【路由器】，或者通过交叉网线，直接连接到【电脑】。电脑与开发板，应该在同一个网段
开机进入 u-boot 命令行，输入如下命令
设置 ethaddrsetenv ethaddr '0e:b4:00:52:24:0e'
设置 serveripsetenv serverip '192.168.1.100'
设置 ipaddrsetenv ipaddr '192.168.1.110'
设置 netmasksetenv netmask '255.255.255.0'
设置 gatewayipsetenv gatewayip '192.168.1.1'
最后saveenv保存 env 设置，并reset重启
=> setenv ethaddr '0e:b4:00:52:24:0e'=> setenv serverip '192.168.1.100'=> setenv ipaddr '192.168.1.110'=> setenv netmask '255.255.255.0'=> setenv gatewayip '192.168.1.1'=> saveenvSaving Environment to MMC... Writing to MMC(1)... OK=> resetresetting ...
验证u-boot 下网络
通过 ping 命令验证
ping 路由器网关地址，如
=> ping 192.168.1.1Using ethernet@02188000 devicehost 192.168.1.1 is alive
ping 电脑的 ip 地址
=> ping 192.168.1.100Using ethernet@02188000 devicehost 192.168.1.100 is alive
说明【迅为iMX6Q】开发板 u-boot .04 下的 以太网驱动，适配成功
u-boot 启动信息
U-Boot .04-00021-g5802f0b622 (Jan 08 - 21:48:15 +0800)CPU: i.MX6Q rev1.3 996 MHz (running at 792 MHz)CPU: Extended Commercial temperature grade (-20C to 105C) at 41CReset cause: PORModel: i.MX6 Quad Topeet Smart Device BoardBoard: MX6-topeetDRAM: 2 GiBMMC: FSL_SDHC: 1, FSL_SDHC: 2, FSL_SDHC: 3Loading Environment from MMC... OKNo panel detected: default to Hannstar-XGADisplay: Hannstar-XGA (1024x768)In: serialOut: serialErr: serialflash target is MMC:1Net: eth0: ethernet@02188000 [PRIME]Fastboot: NormalNormal BootHit any key to stop autoboot: 0=>=>=> printenvbaudrate=115200board_name=TOPEETboard_rev=MX6Qboot_fdt=trybootargs=console=ttymxc0,115200 root=/dev/mmcblk1p3 rootwait rwbootcmd=ext4load mmc 1:1 0x18000000 imx6q-topeet.dtb; ext4load mmc 1:1 0x12000000 zImage; bootz 0x12000000 - 0x18000000bootcmd_mfg=run mfgtool_args;if iminfo ${initrd_addr}; then if test ${tee} = yes; then bootm ${tee_addr} ${initrd_addr} ${fdt_addr}; else bootz ${loadaddr} ${initrd_addr} ${fdt_addr}; fi; else echo "Run fastboot ..."; fastboot 0; fi;bootdelay=3bootscript=echo Running bootscript from mmc ...; sourceconsole=ttymxc0dfu_alt_info=spl raw 0x400dfu_alt_info_img=u-boot raw 0x10000dfu_alt_info_spl=spl raw 0x400dfuspi=dfu 0 sf 0:0:10000000:0emmc_dev=3emmcdev=2epdc_waveform=epdc_splash.binethact=ethernet@02188000ethaddr=0e:b4:00:52:24:0eethprime=eth0fastboot_dev=mmc1fdt_addr=0x18000000fdt_file=imx6q-topeet.dtbfdt_high=0xfffffffffdtcontroladdr=8df5f1a8fileaddr=18000000filesize=cedcfindfdt=if test $fdt_file = undefined; then if test $board_name = SABREAUTO && test $board_rev = MX6QP; then setenv fdt_file imx6qp-sabreauto.dtb; fi; if test $board_name = SABREAUTO && test $board_rev = MX6Q; then setenv fdt_file imx6q-sabreauto.dtb; fi; if test $board_name = SABREAUTO && test $board_rev = MX6DL; then setenv fdt_file imx6dl-sabreauto.dtb; fi; if test $board_name = SABRESD && test $board_rev = MX6QP; then setenv fdt_file imx6qp-sabresd.dtb; fi; if test $board_name = SABRESD && test $board_rev = MX6Q; then setenv fdt_file imx6q-sabresd.dtb; fi; if test $board_name = SABRESD && test $board_rev = MX6DL; then setenv fdt_file imx6dl-sabresd.dtb; fi; if test $fdt_file = undefined; then echo WARNING: Could not determine dtb to use; fi; fi;findtee=if test $tee_file = undefined; then if test $board_name = SABREAUTO && test $board_rev = MX6QP; then setenv tee_file uTee-6qpauto; fi; if test $board_name = SABREAUTO && test $board_rev = MX6Q; then setenv tee_file uTee-6qauto; fi; if test $board_name = SABREAUTO && test $board_rev = MX6DL; then setenv tee_file uTee-6dlauto; fi; if test $board_name = SABRESD && test $board_rev = MX6QP; then setenv tee_file uTee-6qpsdb; fi; if test $board_name = SABRESD && test $board_rev = MX6Q; then setenv tee_file uTee-6qsdb; fi; if test $board_name = SABRESD && test $board_rev = MX6DL; then setenv tee_file uTee-6dlsdb; fi; if test $tee_file = undefined; then echo WARNING: Could not determine tee to use; fi; fi;finduuid=part uuid mmc ${mmcdev}:2 uuidgatewayip=192.168.1.1get_cmd=dhcpimage=zImageinitrd_addr=0x12C00000initrd_high=0xffffffffip_dyn=yesipaddr=192.168.1.110kboot=bootzloadaddr=0x12000000loadbootscript=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}loadtee=fatload mmc ${mmcdev}:${mmcpart} ${tee_addr} ${tee_file}mfgtool_args=setenv bootargs console=${console},${baudrate} rdinit=/linuxrc clk_ignore_unusedmmcargs=setenv bootargs console=${console},${baudrate} ${smp} root=${mmcroot}mmcautodetect=yesmmcboot=echo Booting from mmc ...; run mmcargs; if test ${tee} = yes; then run loadfdt; run loadtee; bootm ${tee_addr} - ${fdt_addr}; else if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if run loadfdt; then bootz ${loadaddr} - ${fdt_addr}; else if test ${boot_fdt} = try; then bootz; else echo WARN: Cannot load the DT; fi; fi; else bootz; fi;fi;mmcdev=1mmcpart=1mmcroot=/dev/mmcblk1p2 rootwait rwnetargs=setenv bootargs console=${console},${baudrate} ${smp} root=/dev/nfs ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcpnetboot=echo Booting from net ...; run netargs; if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; ${get_cmd} ${image}; if test ${tee} = yes; then ${get_cmd} ${tee_addr} ${tee_file}; ${get_cmd} ${fdt_addr} ${fdt_file}; bootm ${tee_addr} - ${fdt_addr}; else if test ${boot_fdt} = yes || test ${boot_fdt} = try; then if ${get_cmd} ${fdt_addr} ${fdt_file}; then bootz ${loadaddr} - ${fdt_addr}; else if test ${boot_fdt} = try; then bootz; else echo WARN: Cannot load the DT; fi; fi; else bootz; fi; fi;netmask=255.255.255.0script=boot.scrsd_dev=2serial#=170da1d4ee695b4cserverip=192.168.1.100soc_type=imx6qspi_bus=0spi_uboot=0x400splashimage=0x28000000tee=notee_addr=0x20000000tee_file=undefinedupdate_emmc_firmware=if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; if ${get_cmd} ${update_sd_firmware_filename}; then if mmc dev ${emmcdev} 1; then setexpr fw_sz ${filesize} / 0x200; setexpr fw_sz ${fw_sz} + 1; mmc write ${loadaddr} 0x2 ${fw_sz}; fi; fiupdate_sd_firmware=if test ${ip_dyn} = yes; then setenv get_cmd dhcp; else setenv get_cmd tftp; fi; if mmc dev ${mmcdev}; then if ${get_cmd} ${update_sd_firmware_filename}; then setexpr fw_sz ${filesize} / 0x200; setexpr fw_sz ${fw_sz} + 1; mmc write ${loadaddr} 0x2 ${fw_sz}; fi; fiweim_base=0x08000000weim_uboot=0x08001000Environment size: 4962/8188 bytes
小结
适配 u-boot 下的以太网驱动，除了对照原理图，确认以太网驱动PHY 的 引脚配置，还需确认 u-boot 下配置的 PHY 型号是否一致，如【迅为imx6q】开发板，以太网 PHY 是REALTEK的RTL8211E
以太网驱动 PHY，一般都需要 复位操作，增加delay 操作，新版本的u-boot，需要在设备树文件中增加。
