[U-Boot] How to program u-boot in eMMC/MMC on iMX

[Marco Cavallini]

2015-02-23 16:03 GMT+01:00 Otavio Salvador <otavio at ossystems.com.br>:
> On Mon, Feb 23, 2015 at 11:57 AM, Marco Cavallini
> <cavallini.koan at gmail.com> wrote:
>> 2015-02-23 15:20 GMT+01:00 Fabio Estevam <festevam at gmail.com>:
>>> Hi Marco,
>>>
>>> On Mon, Feb 23, 2015 at 11:11 AM, Marco Cavallini
>>> <cavallini.koan at gmail.com> wrote:
>>>> Hello,
>>>>
>>>> I'd like to know if exists a method to store in eMMC a bootolader
>>>> without kobs-ng, so without using linux, but simply running a command
>>>> from u-boot.
>>>> I booted my i.MX28 system (I have the same question for i.MX6 as well)
>>>> using the u-boot.sb (u-boot-2015.01 with SPL) file loaded with mxsldr
>>>> (or imx-bootlets).
>>>> Now I am trying to save it in eMMC with the following command
>>>>  loady    (load u-boot.sb with ymodem)
>>>>  mmc write ${loadaddr} 0 ${filesize}
>>>> but at reboot nothing happens.
>>>> Is it possible?
>>>
>>> You should flash u-boot.sd, not u-boot.sb.
>>>
>>> Please check doc/README.mxs on how to generate u-boot.sd.
>>
>>
>> Hi Fabio,
>> I did the following steps on the host
>> $ make u-boot.sb
>> $ ./tools/mxsboot sd u-boot.sb u-boot.sd
>>
>> then in u-boot
>>> loady    (load u-boot.sd with ymodem)
>>> mmc write ${loadaddr} 0 ${filesize}
>>
>> but at reboot no output on serial port.
>> Maybe do I need to format the eMMC before?
>
> The eMMC is handled as a SD Card so yes you need the partitioning, the
> label and all same things you need in the SD. Check the README about
> the partitioning details.
>
> --
> Otavio Salvador                             O.S. Systems
> http://www.ossystems.com.br        http://code.ossystems.com.br
> Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750


Hi Otavio,
so I need to clarify my question:

Does exists a method to store a u-boot bootolader in an unpartitioned
unformatted eMMC (without kobs-ng, so without using linux), but simply
running a command from u-boot?

So in case I have only USB-OTG as connection method to my board I am
forced to use MfgTools?

TIA
--
Marco