Re: [ptxdist] Compilation for ARM926ej-s --> S3c2451

[Guillermo Rodriguez Garcia <guille.rodriguez@gmail.com>]

2014-12-03 18:00 GMT+01:00 Carlos Leyva Guerrero <carlos.leyva@idener.es>:
[...]
>>> If I provide you the patch and config file I did for the kernel 3.6,
>>> would you mind testing if you are able to compile and boot with it?
>>
>>
>> Sure, I can do that, but it will probably be 2-3 weeks before I can try
>> it. I have some high priority stuff to take care off before that (this is
>> also why I had to put my ongoing work on barebox in standby).
>>
>> I can also send you my kernelconfig and platformconfig files if you think
>> this would be helpful.
>
> Please send them so I can run some additional checks, see diferences in
> kernels that could explain the non-booting issue.

Let me dig these (I want to make sure to send the correct files) and I
will send them to you.

[...]
>> I will try this but I dont't think this will work. The NAND locking is not
>> accidental -- it is done explicitly by superboot through the "tight lock"
>> bit in the S3C2451 NAND controller. So I expect they would also do the same
>> in USB mode.
>
>
> I am in contact with the original manufacturer of the boards, and I have
> talked with them several time about uboot, I will contact them and will ask
> if they in fact block the nand in all modes.

Please let me know if you get any feedback on this.

>>> Remember to use a good quality mini-usb cables, If you have problems
>>> detecting the board, messages like "data not accepted by the board", it is
>>> due to bad quality wires.
>>>
>>> - You have to fuse the bootloader into the SD card or the nand, process
>>> similar to the one used to get uboot working in our boards (there are boards
>>> in china with uboot working with 2451, and there is some documentation from
>>> samsung (I can provide it to you if you want).
>>>
>>> If first stage bootloader lock nand in any situation, there is no other
>>> solution than using the SD fused bootloader option.
>>
>>
>> Yes. This one will work for sure. Actually I am waiting for some boards
>> with u-boot preloaded, this will help me proceed without worrying about
>> superboot for the time being :)
>
>
> This statement is the most surprising!. Pre-loaded uboot? can I ask which
> provider will serve this boards to you (you can answer by private if you
> can't share it openly)? I have identify other providers with same chip
> (s3c2451) but different boards and unless USA FA distributor AAH ships the
> boards with uboot, I have missed a new distributor!.

Maybe I was too fast in my reply. The boards I am getting (from
Boardcon) are not actually based on the s3c2451; they are based on the
s3c2416 instead. However these are very similar (they even use the
same chip ID) except for some extra onboard peripherals in the
S3C2451.

http://armbest.com/Tiny2451_CPU%20Compare.html

Guillermo

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