[U-Boot] How to start U-Boot for i.MX31 NAND out of RedBoot (out of RAM)

[Ulrich Gerster]

Hello again,

>>> Magnus Lilja <lilja.magnus at gmail.com> 14.07.09 13.08 Uhr >>>
> Hi

>> Another strange thing is the nand driver. I build my u-boot with:
>> #define CONFIG_MX31_NAND   1
>> #define CONFIG_CMD_NAND
>> #define CONFIG_SYS_NO_FLASH   1
>> #define CONFIG_ENV_IS_IN_NAND   1
>> #define CONFIG_SYS_NAND_BASE   CS0_BASE
>> #define CONFIG_SYS_MAX_NAND_DEVICE      1
>> #define CONFIG_SYS_NAND_MAX_CHIPS       1
>>
>> If I then try to get "flinfo" information u-boot jumps to the next command line and prints nothing.
>> If I try "nand info" I get information about nand device 0.
>> Another strange thing is that I can't read from nand flash but I can write.
>>
>> Do you have any suggestions?

> The only i.MX31 NAND driver I've used in U-boot is the one I submitted
> to the list last year but it was rejected. Other people have sent
> updated drivers (I think there was a i.MX27 driver posted not long
> ago), but I haven't tried these.
> Even so, the CONFIG_SYS_NAND_BASE looks incorrect but I don't know if
> that's the only problem.

CONFIG_SYS_NAND_BASE   CS0_BASE should be correct because the Flash is located at 0xA0000000 which should be CS0_BASE. Why do you think it is wrong?

I used the patch from you out of this posting:
[U-Boot-Users] [PATCH RFC 3/5] i.MX31: Add i.MX31 NAND Flash Controller driver.
http://lists.denx.de/pipermail/u-boot/2008-August/038239.html

They should work, or not? Do they require something else?

Thanks a lot for your help.

Best Regards 
Ulrich Gerster