[问答]

openwrt在Nano R2s上启动失败的原因是什么

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问答对人有帮助，内容完整，我也想知道答案 0 openwrt在Nano R2s上启动失败的原因是什么？如何去解决这个问题？ rk3328芯片的启动过程和openwrt中对uboot和镜像的最终生成过程是怎样的？ 0
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答案对人有帮助，有参考价值 0 问题现象在master主线的版本编译后，烧写到闪迪的32G TF卡后，发现不能启动，通过串口，得到以下输出。 U-Boot TPL 2021.01 (Jun 13 2021 - 22:02:19) DDR4, 333MHz BW=32 Col=10 Bk=4 BG=2 CS0 Row=15 CS=1 Die BW=16 Size=1024MB Trying to boot from BOOTROM Returning to boot ROM... U-Boot SPL 2021.01 (Jun 13 2021 - 22:02:19 +0000) Trying to boot from MMC1 mmc_load_image_raw_sector: mmc block read error SPL: failed to boot from all boot devices 问题分析通过添加日志，定位mmc_load_image_raw_sector接口，有如下日志： U-Boot TPL 2021.01 (Jun 13 2021 - 22:02:19) DDR4, 333MHz BW=32 Col=10 Bk=4 BG=2 CS0 Row=15 CS=1 Die BW=16 Size=1024MB Trying to boot from BOOTROM Returning to boot ROM... U-Boot SPL 2021.01 (Jun 13 2021 - 22:02:19 +0000) Trying to boot from MMC1 Buswidth = 0, clock: 0 Buswidth = 0, clock: 0 Buswidth = 1, clock: 0 Buswidth = 1, clock: 400000 CMD_SEND:0 ARG 0x00000000 Sending CMD0 MMC_RSP_NONE CMD_SEND:8 ARG 0x000001aa Sending CMD8 MMC_RSP_R1,5,6,7 0x000001aa CMD_SEND:55 ARG 0x00000000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00800120 CMD_SEND:41 ARG 0x40300000 Sending CMD41 MMC_RSP_R3,4 0x00ff8000 CMD_SEND:55 ARG 0x00000000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00000120 CMD_SEND:41 ARG 0x40300000 Sending CMD41 MMC_RSP_R3,4 0x00ff8000 CMD_SEND:55 ARG 0x00000000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00000120 CMD_SEND:41 ARG 0x40300000 Sending CMD41 MMC_RSP_R3,4 0x00ff8000 CMD_SEND:55 ARG 0x00000000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00000120 CMD_SEND:41 ARG 0x40300000 Sending CMD41 MMC_RSP_R3,4 0x00ff8000 CMD_SEND:55 ARG 0x00000000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00000120 CMD_SEND:41 ARG 0x40300000 Sending CMD41 MMC_RSP_R3,4 0x00ff8000 CMD_SEND:55 ARG 0x00000000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00000120 CMD_SEND:41 ARG 0x40300000 Sending CMD41 MMC_RSP_R3,4 0x80ff8000 CMD_SEND:2 ARG 0x00000000 Sending CMD2 MMC_RSP_R2 0x03534453 0x44303332 0x80ffffff 0xff0062c5 DUMPING DATA 000 - 03 53 44 53 004 - 44 30 33 32 008 - 80 ff ff ff 012 - ff 00 62 c5 CMD_SEND:3 ARG 0x00000000 Sending CMD3 MMC_RSP_R1,5,6,7 0xd5550520 CMD_SEND:9 ARG 0xd5550000 Sending CMD9 MMC_RSP_R2 0x00260032 0x515981e9 0xbef9cfff 0x92404053 DUMPING DATA 000 - 00 26 00 32 004 - 51 59 81 e9 008 - be f9 cf ff 012 - 92 40 40 53 CMD_SEND:7 ARG 0xd5550000 Sending CMD7 MMC_RSP_R1,5,6,7 0x00000700 CMD_SEND:55 ARG 0xd5550000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00000920 CMD_SEND:51 ARG 0x00000000 Sending CMD51 MMC_RSP_R1,5,6,7 0x00000920 CMD_SEND:55 ARG 0xd5550000 Sending CMD55 MMC_RSP_R1,5,6,7 0x00000920 CMD_SEND:6 ARG 0x00000000 Sending CMD6 MMC_RSP_R1,5,6,7 0x00000920 Buswidth = 1, clock: 400000 Buswidth = 1, clock: 25000000 spl: mmc boot mode: raw CMD_SEND:16 ARG 0x00000200 Sending CMD16 MMC_RSP_R1,5,6,7 0x00000900 CMD_SEND:17 ARG 0x00800000 Sending CMD17 MMC_RSP_R1,5,6,7 0x00000900 hdr read sector 4000, count=1 dump header... magic:0x0 hcrc: 0x0 size: 0x0 load: 0x0 ============== mmc_load_image_raw_sector: mmc block read error spl: mmc boot mode: fs SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ### 可以看出在协商后，MMC总线宽度为1，而不是4，这是不能正常进行通信的。通过查找MMC协议手册，BUS宽度是可以通过协商然后确定的。接下来就查看原理图，再对比linux下的设备树，TF卡的电源通过vcc_sd和vcc_io_sdio控制，而在rk3328-nanopi-r2s-u-boot.dtsi和rk3328-nanopi-r2s.dts中，有如下内容： /* Need this and all the pinctrl/gpio stuff above to set pinmux / &vcc_sd { u-boot,dm-spl; }; vcc_io_sdio: sdmmcio-regulator { compatible = "regulator-gpio"; enable-active-high; gpios = <&gpio1 RK_PD4 GPIO_ACTIVE_HIGH>; pinctrl-0 = <&sdio_vcc_pin>; pinctrl-names = "default"; regulator-name = "vcc_io_sdio"; regulator-always-on; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <3300000>; regulator-settling-time-us = <5000>; regulator-type = "voltage"; startup-delay-us = <2000>; states = <1800000 0x1 3300000 0x0>; vin-supply = <&vcc_io_33>; }; vcc_sd: sdmmc-regulator { compatible = "regulator-fixed"; gpio = <&gpio0 RK_PD6 GPIO_ACTIVE_LOW>; pinctrl-0 = <&sdmmc0m1_gpio>; pinctrl-names = "default"; regulator-name = "vcc_sd"; regulator-boot-on; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; vin-supply = <&vcc_io_33>; }; &sdmmc { bus-width = <4>; cap-sd-highspeed; disable-wp; pinctrl-0 = <&sdmmc0_clk>, <&sdmmc0_cmd>, <&sdmmc0_dectn>, <&sdmmc0_bus4>; pinctrl-names = "default"; sd-uhs-sdr12; sd-uhs-sdr25; sd-uhs-sdr50; sd-uhs-sdr104; vmmc-supply = <&vcc_sd>; vqmmc-supply = <&vcc_io_sdio>; status = "okay"; }; 可以看出通过 GPIO1 RK_PD4 控制SD卡的IO电压，通过GPIO0 RK_PD6控制SD的供电电压，前者电压可以配置，后面是固定电压。然后尝试开启MMC的IO可配置选项，再使能对应的pinctrl，并且因为不能启动的卡容量为32G，需要开启UHS支持，接下来进修改，编译后烧写测试。修改如下： diff --git a/arch/arm/dts/rk3328-nanopi-r2s-u-boot.dtsi b/arch/arm/dts/rk3328-nanopi-r2s-u-boot.dtsi index 9e2ced1541..d5469748a2 100644 --- a/arch/arm/dts/rk3328-nanopi-r2s-u-boot.dtsi +++ b/arch/arm/dts/rk3328-nanopi-r2s-u-boot.dtsi @@ -33,6 +33,10 @@ u-boot,dm-spl; }; +&vcc_io_sdio { + u-boot,dm-spl; +}; + &gmac2io { snps,reset-gpio = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>; snps,reset-active-low; diff --git a/arch/arm/dts/rk3328-nanopi-r2s.dts b/arch/arm/dts/rk3328-nanopi-r2s.dts index 5445c5cb3d..452e4764e6 100644 --- a/arch/arm/dts/rk3328-nanopi-r2s.dts +++ b/arch/arm/dts/rk3328-nanopi-r2s.dts @@ -323,7 +323,7 @@ bus-width = <4>; cap-sd-highspeed; disable-wp; - pinctrl-0 = <&sdmmc0_clk>, <&sdmmc0_cmd>, <&sdmmc0_dectn>, <&sdmmc0_bus4>; + pinctrl-0 = <&sdmmc0_clk>, <&sdmmc0_cmd>, <&sdmmc0_dectn>, <&sdmmc0_bus4>, <&sdmmc0m1_gpio>; pinctrl-names = "default"; sd-uhs-sdr12; sd-uhs-sdr25; diff --git a/configs/nanopi-r2s-rk3328_defconfig b/configs/nanopi-r2s-rk3328_defconfig index 52996266a1..a7969bd7ab 100644 --- a/configs/nanopi-r2s-rk3328_defconfig +++ b/configs/nanopi-r2s-rk3328_defconfig @@ -56,6 +56,10 @@ CONFIG_FASTBOOT_BUF_ADDR=0x800800 CONFIG_FASTBOOT_CMD_OEM_FORMAT=y CONFIG_ROCKCHIP_GPIO=y CONFIG_SYS_I2C_ROCKCHIP=y +CONFIG_MMC_IO_VOLTAGE=y +CONFIG_SPL_MMC_IO_VOLTAGE=y +CONFIG_MMC_UHS_SUPPORT=y +CONFIG_SPL_MMC_UHS_SUPPORT=y CONFIG_MMC_DW=y CONFIG_MMC_DW_ROCKCHIP=y CONFIG_SF_DEFAULT_SPEED=20000000 结果经过上面的修改，发现系统能够正常启动了，说明总线宽度正常协商好了，电压范围也OK，下面是正常启动的日志。 U-Boot TPL 2021.01 (Jun 13 2021 - 22:02:19) DDR4, 333MHz BW=32 Col=10 Bk=4 BG=2 CS0 Row=15 CS=1 Die BW=16 Size=1024MB Trying to boot from BOOTROM Returning to boot ROM... U-Boot SPL 2021.01 (Jun 13 2021 - 22:02:19 +0000) Trying to boot from MMC1 Found FIT NOTICE: BL31: v2.3():v2.3 NOTICE: BL31: Built : 15:56:43, Apr 20 2020 NOTICE: BL31:Rockchip release version: v1.2 U-Boot 2021.01 (Jun 13 2021 - 22:02:19 +0000) OpenWrt Model: FriendlyElec NanoPi R2S DRAM: 1022 MiB PMIC: RK8050 (on=0x40, off=0x00) MMC: mmc@ff500000: 1 Loading Environment from MMC... MMC Device 0 not found ** Warning - No MMC card found, using default environment In: serial@ff130000 Out: serial@ff130000 Err: serial@ff130000 Model: FriendlyElec NanoPi R2S Net: eth0: ethernet@ff540000 Hit any key to stop autoboot: 0 => 总结在多次尝试后，拿了一张以前的4G金士顿得到TF卡进行对比，发现金士顿的低速卡是OK的；通过日志就发现协商完两者总线宽度不正常，这个时候去简单搜了下协议，发现不同的速度对应不同的频率和电压，发现是不是电压配置不正确还是哪个GPIO没有配置对。这个时候就去查看同SOC的板子，比较，新增了对dts的修改，再打开了对应的CONFIG选项，果真成功了！！！遇到问题要不断的发现蛛丝马迹，多想一下可能的解决方案，这个时候难题往往就能解决了。

2022-2-17 09:42:13 评论举报刘美隆