[U-Boot] SPL boot with NAND on i.MX6 data abort

[Heiko Schocher]

Hello Markus,

Am 24.09.2015 um 17:03 schrieb Markus Stelzhammer:
> Hi Stefano,
>
>
> Today I grabbed a different Hardware with a bigger NAND chip (512 instead of 256MB).
> At this hardware, SPL is not able to jump to U-Boot. So currently I assume that I might have some
> problems when flashing.
>
> Would you be so kind to review my header file if I miss something or if there is something
> completely wrong?! (I attached it)
> The commands I use to flash are the following:
>
>  > ./kobs-ng init -v -x SPL
>  > nandwrite --start=0x11000 --pad /dev/mtd0 u-boot.uim         (I also tried to flash u-boot.bin
> and u-boot.imx)
>
> The output I get at boot are the following, but then it stucks.
> .......
>  >>spl:board_init_r()
> using memory 0x18300000-0x1b500000 for malloc()
> spl_init()
> boot device - 4
> spl: nand - using hw ecc
> NAND : 0x01:0xdc erasesize=1 (>>0)

 From here the values seems bogus to me ... erasesize 1 ?

> writesize=-1 (>>0)

negative writesize?

> oobsize=65535
> chipsize=1095216660225

Such a big chip?

> Not support the NAND chips whose oob size is larger then 1024 bytes!
> 1044479 MiB

Wow ...

I think you have problems with detecting the NAND, maybe
wrong bus timings?

bye,
Heiko

> nand_spl_load_image offset:0x00011000 len:64 page:69632
> mkimage signature not found - ih_magic = 0
> nand_spl_load_image offset:0x00011000 len:409600 page:69632
> Jumping to U-Boot
> loaded - jumping to U-Boot...image entry point: 0x17800000
>
>
> On 09/24/2015 11:25 AM, Stefano Babic wrote:
>> Hi Markus,
>>
>> On 23/09/2015 10:02, Markus Stelzhammer wrote:
>>> Hi all,
>>>
>>>
>>> I'm currently working on the port of u-boot for our custom boards.
>>> Previously we were using u-boot based on v2013.04 without SPL for our
>>> boards (we have boards with SD also) and this worked for all of our
>>> devices.
>>>
>>> As we now have new boards with different (bigger) RAM, I decided to use
>>> the newest bootloader (v2015.10) and enable SPL support.
>>> This is already working on a board with SD-Card but I'm not getting it
>>> to work on the boards with NAND.
>>>
>>> When I try to boot, SPL is detecting and loading u-boot but u-boot
>>> throws a "data abort" during "ubifs mount".
>> u-boot ist also in NAND ? Then SPL has configured correctly the device
>> else u-boot was not loaded.
>>
>>> The strange thing for me is that when I disable SPL, the board will boot
>>> properly.
>> You can try to follow the data abort and check which addresses are
>> involved. We cannot underestimate that the bug is still present in
>> u-boot, but it appears only together with SPL.
>>
>>> Could anyone give me a hint how I could trace this error?
>>> I can also provide logs or code snippets if needed!
>> Some initialization done previously in u-boot, is done now by SPL -
>> check your code if there is something missing.
>>
>> As your board is not mainlined, we cannot help a much with code.
>>
>> Best regards,
>> Stefano Babic
>>
>
> Best regards,
> Markus
>
>
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