[flashrom] Resolved M25P128 erase/write failed on raspberry pi

[wangmengk at digitalchina.com]

Hi all,
    I have encountered unstable failed when rewrite M25P128 via raspberry
pi, sometimes cannot read out chip id(0x00), sometimes failed @ erase/write
process, at beginning I'm confused because another chip(MX25L128) can work
fine on the same platform, I found similar issue at maillist(attached
below), but in my scenario the unconnected pin is HOLD(low is enable),
after connected HOLD pin to VCC(3.3Volt), M25P128 can work fine.



>[flashrom] MX25L128 Support

>Brian Rak brak at gameservers.com
>Thu Feb 6 02:19:00 CET 2014
>Previous message: [flashrom] MX25L128 Support
>Next message: [flashrom] status report (write works!)
>Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
>So, I connected WP to ground (instead of leaving it unconnected), and
>reduced the speed (spispeed=8000).  Looking at a binary comparison of
>the original file versus what was actually written, it seems that it was
>writing parts of it successfully, but corrupting data every few bytes.
>
>I'm guessing either the raspberry pi can't handle the higher speeds, or
>I'm getting interference from something.
>
>Either way, I've done a couple erase, write, read cycles and it's been
>working fine.
>
>On 2/4/2014 8:16 PM, Brian Rak wrote:
>> So, after realizing that the MX25L256 was the wrong chip, I've
>> obtained a few of the correct chips (MX25L12845EMI-10G).  These are
>> detected by flashrom, but writes are failing.
>>
>> Erase/write done.
>> Verifying flash... FAILED at 0x00000002! Expected=0x55, Found=0x75,
>> failed byte count from 0x00000000-0x00ffffff: 0x3e5cb3
>> Your flash chip is in an unknown state.
>> Please report this on IRC at chat.freenode.net (channel #flashrom) or
>> mail flashrom at flashrom.org, thanks!
>>
>> This is using a raspberry pi as a programmer, and:
>>
>> ./flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32000 -w
>> ../flashrom/ipmi/SMT_313.bin -o debug1
>>
>> -rw-r--r-- 1 root root 16777216 Jan  2
19:10 ../flashrom/ipmi/SMT_313.bin
>>
>>
>> Any suggestions here?  -o debug1 is attached
>>
>>
>> _______________________________________________
>> flashrom mailing list
>> flashrom at flashrom.org
>> http://www.flashrom.org/mailman/listinfo/flashrom


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