[U-Boot] Trouble with mmc 1 on exynos snow chromebook

[U-Boot] Trouble with mmc 1 on exynos snow chromebook

[bruce m beach]

Hello

 I have a samsung "snow" chromebook. Building u-boot from

git clone git://git.denx.de/u-boot.git

and changing #define CONFIG_SYS_TEXT_BASE 0x43E00000 to
             #define CONFIG_SYS_TEXT_BASE 0x42400000

in include/configs/exynos5250-common.h I get a chained u-boot
that boots. (if I don't make that change I just get a blank screen)
The problem that I'm have is that dev mmc 1 (mmcblk1) doesn't seem to
work. dev mmc 0 (mmcblk0) does work as far as I have tested it.
Below are some of the messages that I get. (btw there are no
mmc init or mmcinit commands)

snow> mmc rescan
      dwmci_send_cmd: data ERROR!
snow> mmc dev 1
      dwmci_send_cmd: Timeout
snow> mmc list
      EXYNOS DWMMC 0 (eMMC)
      EXYNOS DWMMC 1
snow> ext2load mmc 1:2 ${loadaddr} env.txt
      dwmci_send_cmd: Timeout
      ** bad device mmc 1 **

The ext2load command I regularly use on mmc1 using a precompiled version
of u-boot works fine so mmc 1 (and the filesystem) is okay

Thanks

  Bruce

[U-Boot] Trouble with mmc 1 on exynos snow chromebook

[Jaehoon Chung]

Hi,

On 07/17/2015 12:44 PM, bruce m beach wrote:
> Hello
> 
>  I have a samsung "snow" chromebook. Building u-boot from
> 
> git clone git://git.denx.de/u-boot.git
> 
> and changing #define CONFIG_SYS_TEXT_BASE 0x43E00000 to
>              #define CONFIG_SYS_TEXT_BASE 0x42400000
> 
> in include/configs/exynos5250-common.h I get a chained u-boot
> that boots. (if I don't make that change I just get a blank screen)
> The problem that I'm have is that dev mmc 1 (mmcblk1) doesn't seem to
> work. dev mmc 0 (mmcblk0) does work as far as I have tested it.
> Below are some of the messages that I get. (btw there are no
> mmc init or mmcinit commands)

"mmc rescan" command work to initialize mmc or sd.
I don't have the chromebook.

Could you enable the CONFIG_MMC_TRACE and share the log message?

Best Regards,
Jaehoon Chung

> 
> snow> mmc rescan
>       dwmci_send_cmd: data ERROR!
> snow> mmc dev 1
>       dwmci_send_cmd: Timeout
> snow> mmc list
>       EXYNOS DWMMC 0 (eMMC)
>       EXYNOS DWMMC 1
> snow> ext2load mmc 1:2 ${loadaddr} env.txt
>       dwmci_send_cmd: Timeout
>       ** bad device mmc 1 **
> 
> The ext2load command I regularly use on mmc1 using a precompiled version
> of u-boot works fine so mmc 1 (and the filesystem) is okay
> 
> Thanks
> 
>   Bruce
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