R-Car M3 MMC初始化失败

Question

最近我买了一块R-Car M3开发板。我已经按照elinux.org/.../ YOCTO -Gen3上的步骤使用Yocto 3.9.0成功构建了一个嵌入式Linux镜像

我还按照elinux.org/.../M3SK上的步骤更新了主板的固件。

现在我正在尝试从SD卡启动Linux镜像，但当我打开我的主板时，我得到了错误"MMC init fail“。我知道我可以访问SD卡并加载保存在那里的图像。但是，当尝试从SD卡启动时，它会停止启动并显示以下消息："mmc0: error -110 whilst MMC卡“

尝试启动时出现此错误似乎是因为主板无法初始化mmc。有没有人遇到过同样的问题？有人能帮我解决这个问题吗？

引导日志

Welcome to minicom 2.7



OPTIONS: I18n

Compiled on Nov 15 2018, 20:18:47.

Port /dev/ttyUSB0, 22:57:14



Press CTRL-A Z for help on special keys



[ 0.000190] NOTICE: BL2: R-Car Gen3 Initial Program Loader(CA57) Rev.1.0.21

[ 0.005752] NOTICE: BL2: PRR is R-Car M3 Ver.1.0

[ 0.010421] NOTICE: BL2: Board is Starter Kit Rev.1.0

[ 0.015533] NOTICE: BL2: Boot device is HyperFlash(80MHz)

[ 0.020959] NOTICE: BL2: LCM state is CM

[ 0.025001] NOTICE: BL2: AVS setting succeeded. DVFS_SetVID=0x53

[ 0.030988] NOTICE: BL2: DDR3200(rev.0.33)NOTICE: [COLD_BOOT]NOTICE: ..0

[ 0.086074] NOTICE: BL2: DRAM Split is 2ch

[ 0.089960] NOTICE: BL2: QoS is default setting(rev.0.19)

[ 0.095463] NOTICE: BL2: Lossy Decomp areas

[ 0.099636] NOTICE: Entry 0: DCMPAREACRAx:0x80000540 DCMPAREACRBx:0x570

[ 0.106721] NOTICE: Entry 1: DCMPAREACRAx:0x40000000 DCMPAREACRBx:0x0

[ 0.113633] NOTICE: Entry 2: DCMPAREACRAx:0x20000000 DCMPAREACRBx:0x0

[ 0.120548] NOTICE: BL2: v1.4(release):15dba6b

[ 0.125038] NOTICE: BL2: Built : 05:48:04, Feb 18 2019

[ 0.130225] NOTICE: BL2: Normal boot

[ 0.133871] NOTICE: BL2: dst=0xe6320d00 src=0x8180000 len=512(0x200)

[ 0.140254] NOTICE: BL2: dst=0x43f00000 src=0x8180400 len=6144(0x1800)

[ 0.146875] NOTICE: BL2: dst=0x44000000 src=0x81c0000 len=65536(0x10000)

[ 0.154105] NOTICE: BL2: dst=0x44100000 src=0x8200000 len=1048576(0x100000)

[ 0.168928] NOTICE: BL2: dst=0x50000000 src=0x8640000 len=1048576(0x100000)





U-Boot 2015.04 (Feb 17 2019 - 23:28:11)



CPU: Renesas Electronics R8A7796 rev 1.0

Board: M3ULCB

I2C: ready

DRAM: 1.9 GiB

Bank #0: 0x048000000 - 0x07fffffff, 896 MiB

Bank #1: 0x600000000 - 0x63fffffff, 1 GiB



MMC: sh-sdhi: 0, sh-sdhi: 1

MMC init failed

Using default environment



In: serial

Out: serial

Err: serial

Net: Board Net Initialization Failed

No ethernet found.

Hit any key to stop autoboot: 0

=> mmc dev 0

switch to partitions #0, OK

mmc0 is current device

=> mmc info

Device: sh-sdhi

Manufacturer ID: 3

OEM: 5344

Name: SC64G

Tran Speed: 50000000

Rd Block Len: 512

SD version 3.0

High Capacity: Yes

Capacity: 59.5 GiB

Bus Width: 4-bit

Erase Group Size: 512 Bytes

=> ext2ls mmc 0:1 /boot

<DIR> 4096 .

<DIR> 4096 ..

<SYM> 28 Image

18522624 Image-4.14.35-yocto-standard

67069 Image-r8a7796-m3ulcb.dtb

67069 r8a7796-m3ulcb.dtb

67069 Image--4.14.35+git0+118adc53e8-r1-r8a7796-m3ulcb-2019021804481b

=> setenv bootargs 'rw root=/dev/mmcblk0p1 rootfstype=ext4 rootwait'

=> saveenv

Saving Environment to MMC...

MMC init failed
**END OF BOOTING LOG**

**DTB file Information** 

sd@ee100000 {
            compatible = "renesas,sdhi-r8a7796", "renesas,rcar-gen3-sdhi";
            reg = <0x0 0xee100000 0x0 0x2000>;
            interrupts = <0x0 0xa5 0x4>;
            clocks = <0xa 0x1 0x13a>;
            max-frequency = <0xbebc200>;
            power-domains = <0x7 0x20>;
            resets = <0xa 0x13a>;
            status = "okay";
            pinctrl-0 = <0x61>;
            pinctrl-1 = <0x62>;
            pinctrl-names = "default", "state_uhs";
            vmmc-supply = <0x63>;
            vqmmc-supply = <0x64>;
            cd-gpios = <0x65 0xc 0x1>;
            bus-width = <0x4>;
            sd-uhs-sdr50;
            sd-uhs-sdr104;
        };

        sd@ee120000 {
            compatible = "renesas,sdhi-r8a7796", "renesas,rcar-gen3-sdhi";
            reg = <0x0 0xee120000 0x0 0x2000>;
            interrupts = <0x0 0xa6 0x4>;
            clocks = <0xa 0x1 0x139>;
            max-frequency = <0xbebc200>;
            power-domains = <0x7 0x20>;
            resets = <0xa 0x139>;
            status = "disabled";
        };

        sd@ee140000 {
            compatible = "renesas,sdhi-r8a7796", "renesas,rcar-gen3-sdhi";
            reg = <0x0 0xee140000 0x0 0x2000>;
            interrupts = <0x0 0xa7 0x4>;
            clocks = <0xa 0x1 0x138>;
            max-frequency = <0xbebc200>;
            power-domains = <0x7 0x20>;
            resets = <0xa 0x138>;
            status = "okay";
            pinctrl-0 = <0x66>;
            pinctrl-1 = <0x67>;
            pinctrl-names = "default", "state_uhs";
            vmmc-supply = <0x68>;
            vqmmc-supply = <0x69>;
            bus-width = <0x8>;
            mmc-hs200-1_8v;
            mmc-hs400-1_8v;
            non-removable;
        };

        sd@ee160000 {
            compatible = "renesas,sdhi-r8a7796", "renesas,rcar-gen3-sdhi";
            reg = <0x0 0xee160000 0x0 0x2000>;
            interrupts = <0x0 0xa8 0x4>;
            clocks = <0xa 0x1 0x137>;
            max-frequency = <0xbebc200>;
            power-domains = <0x7 0x20>;
            resets = <0xa 0x137>;
            status = "disabled";
        };

Answer 1

对于Renesas Yocto版本3.9.0，在以下位置提出了一些已知的问题：

https://elinux.org/R-Car/Boards/M3SK

(向下滚动到底部)

您应该将解决方法应用于内核的MMC驱动程序。

对于M3SK上的mmc规范，

  + sdhi0: used for sdcard 4-bit bus width 
  + sdhi2: used for on-board 8bit eMMC
  + sd-uhs-sdr50: SD UHS SDR50 speed is supported
  + sd-uhs-sdr104: SD UHS SDR104 speed is supported
  + mmc-hs200-1_8v: eMMC HS200 mode(1.8V I/O) is supported
  + mmc-hs400-1_8v: eMMC HS400 mode(1.8V I/O) is supported

还有一些补丁可以解决你的问题：

https://patchwork.kernel.org/patch/9963437/

https://patchwork.kernel.org/patch/9998159/

顺便说一下，您使用的是arm-TFv1.4，为了兼容，它应该与u-boot v2018.09一起使用。

Answer 2

u-boot应该支持mmc和sdcard init。你有没有试着用另一张SD卡？

要更新u-boot-elf.srec，您需要来自https://github.com/renesas-rcar/flash_writer的flash_writer

在SCIF下载模式或

1. 下载模式下构建flash_writer
2. Let设备启动。键入"ctrl+A S"，发送您的xxx.mot
3. 参考https://elinux.org/R-Car/Boards/M3SK#Flashing_firmware

中的步骤