[U-Boot] problem with eMMC boot on arndale board

[U-Boot] problem with eMMC boot on arndale board

[Guillaume Gardet]

Hi,

does anyone has tried eMMC boot on Arndale board?

I copied BL1, SPL and u-boot to eMMC, like I do on SD card but it does not boot at all.

Note that once booted on SD card, I get some errors while accessing eMMC.

"mmc dev 0" returns:
         dwmci_send_cmd: DATA ERROR!
         switch to partitions #0, OK
         mmc0(part 0) is current device

"mmc info" returns:
         Device: EXYNOS DWMMC
         Manufacturer ID: 15
         OEM: 100
         Name: M4G1F
         Tran Speed: 52000000
         Rd Block Len: 512
         MMC version 4.41
         High Capacity: Yes
         Capacity: 3.7 GiB
         Bus Width: 4-bit

I think it does not boot because of this problem on eMMC.

Is there anything I could try to fix it?


Guillaume

[U-Boot] problem with eMMC boot on arndale board

[Ian Campbell]

On Fri, 2014-10-17 at 12:20 +0200, Guillaume Gardet wrote:
> Hi,
> 
> does anyone has tried eMMC boot on Arndale board?

Other than the image which was in mine when it arrived, no, I've only
booted from the removable SD/MMC device.

> Note that once booted on SD card, I get some errors while accessing eMMC.

I've just tried these and FWIW I see the same things.

AFAICT the emmc works well enough to save/load the environment, but
other than that I've not used it much.

> Is there anything I could try to fix it?

Sorry, no ideas here :-(

Ian.

[U-Boot] problem with eMMC boot on arndale board

[Michael Trimarchi]

Hi

On Fri, Oct 17, 2014 at 1:11 PM, Ian Campbell <ijc@hellion.org.uk> wrote:
> On Fri, 2014-10-17 at 12:20 +0200, Guillaume Gardet wrote:
>> Hi,
>>
>> does anyone has tried eMMC boot on Arndale board?
>
> Other than the image which was in mine when it arrived, no, I've only
> booted from the removable SD/MMC device.
>
>> Note that once booted on SD card, I get some errors while accessing eMMC.
>
> I've just tried these and FWIW I see the same things.
>

I suggest to test if it's an error or timeout. If you go some line up
I have seen some retry to read
this register but I don't have any documentation of the cpu. It's nice
already to have a patch that change DATA ERROR!

Michael

> AFAICT the emmc works well enough to save/load the environment, but
> other than that I've not used it much.
>
>> Is there anything I could try to fix it?
>
> Sorry, no ideas here :-(
>
> Ian.
>
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| Michael Nazzareno Trimarchi                     Amarula Solutions BV |
| COO  -  Founder                                      Cruquiuskade 47 |
| +31(0)851119172                                 Amsterdam 1018 AM NL |
|                  [`as] http://www.amarulasolutions.com               |

[U-Boot] problem with eMMC boot on arndale board

[Anatolij Gustschin]

On Fri, 17 Oct 2014 12:20:44 +0200
Guillaume Gardet <guillaume.gardet@free.fr> wrote:

> Hi,
> 
> does anyone has tried eMMC boot on Arndale board?
> 
> I copied BL1, SPL and u-boot to eMMC, like I do on SD card but it does not boot at all.
> 
> Note that once booted on SD card, I get some errors while accessing eMMC.
> 
> "mmc dev 0" returns:
>          dwmci_send_cmd: DATA ERROR!
>          switch to partitions #0, OK
>          mmc0(part 0) is current device
> 
> "mmc info" returns:
>          Device: EXYNOS DWMMC
>          Manufacturer ID: 15
>          OEM: 100
>          Name: M4G1F
>          Tran Speed: 52000000
>          Rd Block Len: 512
>          MMC version 4.41
>          High Capacity: Yes
>          Capacity: 3.7 GiB
>          Bus Width: 4-bit
> 
> I think it does not boot because of this problem on eMMC.

not necessarily.

> Is there anything I could try to fix it?

I'm not familiar with booting from eMMC on Arndale. But for newer eMMC
(>= JEDEC 4.3) you have to configure a boot partition and enable access to
it in the PARTITION_CONFIG register. The "partconf" subcommand of the mmc
command can be used to do it. See also Table 2 in [1]. Then install the
boot code to the selected boot partition and try again.

[1] http://www.micron.com/-/media/documents/products/technical%20note/nand%20flash/tn2918.pdf

HTH,

Anatolij