[U-Boot-Users] Erase error on dual P30 (CFI) flash chips

[Tolunay Orkun]

Stefan Roese wrote:
> On Friday 15 June 2007, w.wegner at astro-kom.de wrote:
>   
>>> Flash erase error at address ffd80000
>>> Block Erase Error.
>>> Block locked.
>>>  done
>>> Erased 1 sectors
>>>       
>> if I am not mistaken, you have to also set:
>>
>> #define CFG_FLASH_PROTECTION 1
>>     
>
> And you will have to set the environment variable "unlock" to "yes". This will 
> unlock all non U-Boot special sectors by default upon powerup.
>
> => setenv unlock yes
> => saveenv
>
>   
Alternative to setting "unlock" environment variable you will need to 
issue "protect off" for any locked sector that should be unlocked. This 
may be handy if you have other stuff on the flash which you would like 
to keep protected. One way to do this is via a u-boot script that is 
executed as part of boot. I think Intel chips (used to) preserve their 
last lock status and recent Spansion chips start all locked upon boot so 
you might not need unlock environment variable for your Intel part as 
well once you have the proper sectors unlocked (for example jffs2 areas)

Tolunay