[flashrom] No EEPROM found (Sony Vaio VGN-FE21S)

[Carl-Daniel Hailfinger]

On 27.11.2009 15:01, Stefan Reinauer wrote:
> On 11/27/09 1:23 PM, Carl-Daniel Hailfinger wrote:
>   
>> You could sniff LPC and SPI buses during reflashing with the vendor
>> flash tool and correlate the dumps.
>>     
> How?
>
> There is not SPI involved, however.
>   

Sorry, my bad. I was writing two mails at the same time and confused the
SPI problem with your problem.


>> It should at least give you an idea
>> on how to probe for the EC and possibly also on how to send commands to
>> the flash chip. The probe sequence is most interesting, though, because
>> it allows flashrom to detect the EC and issue a warning message.
>>   
>>     
> I found out that I can dump (some of) the EC memory using ectool, but
> that's only a minor part of the story.
>
> The ENE 910 has both a SPI and  FWH interface, but otherwise it seems
> fairly similar to a 3700 (which was used in the OLPC)
> Unfortunately I didn't find any info on how to generically identify the
> presence of the 3700 either. In particular, I didn't find the IO address
> for indexing the full EC memory yet (0x381 on the OLPC)
>   

AFAIK this is configurable and can even be disabled by the EC firmware.

Regards,
Carl-Daniel

-- 
Developer quote of the month: 
"We are juggling too many chainsaws and flaming arrows and tigers."