[U-Boot] nand_scan() in ARM9 S3C2410 - kevin.morfitt at fearnside-systems.co.uk

From: kevin.morfitt at fearnside-systems.co.uk <kevin.morfitt@fearnside-systems.co.uk>
To: u-boot@lists.denx.de
Subject: [U-Boot] nand_scan() in ARM9 S3C2410
Date: Mon, 21 Sep 2009 09:04:34 +0100	[thread overview]
Message-ID: <4AB73392.2050501@fearnside-systems.co.uk> (raw)
In-Reply-To: <1f3430fb0909210024r5cacaac2l31136dbf808894a7@mail.gmail.com>

Minkyu Kang wrote:
> Dear J.Hwan.Kim
> 
> 2009/9/20 J.Hwan.Kim <frog1120@gmail.com>:
>> Hi, everyone
>>
>> I'm using u-boot for ARM9 S3C2410.
>> My tool chain is ELDK4.2.
>>
>> I defined configuration "CONFIG_NAND_CMD,
>> CONFIG_SYS_MAX_NAND_DEVICE    1,
>> and CONFIG_SYS_NAND_BASE 0x4E00000C" for nand_init().
>>
>> It works well until the routine reaches nand_scan() which is in nand_base.c
>> When nand_scan() is called, the system hangs.
>>
>> For test, When I written dummy function is nand_base.c and
>> called the dummy function from nand.c, the system is down.
>>
>> My u-boot is using relocation to SDRAM from NAND.
>> The address of nand_scan() is 0x31F85894.
>> (TEXT_BASE is 0x31F80000  and SDRAM start from 0x30000000)
>> I'm sured that the binary data of u-boot.bin (address 0x5894) is same
>> with SDRAM data in 0x31F85894.
>> I think the relocation is  OK.
>>
>> When I attached the routines of nand_base.c to nand.c,
>> the nand_scan() function passed.
>>
>> Is there any hint for this problem?
>>
>> Thanks in advnace.
>>
>> Regards,
>> J.Hwan Kim
>>
>>
>>
>>
>>
>>
>> _______________________________________________
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>> U-Boot at lists.denx.de
>> http://lists.denx.de/mailman/listinfo/u-boot
>>
> 
> Did you check the kevin's mail?
> He said "u-boot for s3c2410 doesn't support".
> http://lists.denx.de/pipermail/u-boot/2009-September/060855.html
> 
u-boot for s3c2410 doesn't support booting from NAND flash, but assuming you
boot from NOR flash and have NAND enabled properly in the board config file it
does support the use of NAND flash.

In the NAND config you show in your email, it's probably a typo but it should be
CONFIG_CMD_NAND not CONFIG_NAND_CMD.

If that's not the problem - I'm not sure what board you're using. If you're
using an existing config file post the name of it, or if you're using one you've
created post the board config file itself.

Regards
Kevin Morfitt

> And I think.. you can trace nand_scan() step by step.
> please try it and do more detailed question.
> 
> Thanks
> Minkyu Kang