[flashrom] Macronix MX25L12835FMI-10G, bus pirate and flashrom support

[Stefan Tauner]

On Mon, 18 Aug 2014 17:38:04 +0200
Marli LI <marco.li.li.marco at gmail.com> wrote:

> Hello all,
> 
> I need some help to get this chip MX25L12835FMI-10G manufactured by
> Macronix to work w/ flashrom.
> 
> I already asked for help on #flashrom IRC channel, but I was referred
> to ask on this mailing list.
> In fact, before I connected everything I asked on IRC if this chip is
> "already" supported, and someone from IRC did double-check it and said
> that the other MX25L128 chip model that IS supported is very similar
> and identifies itself w/ same code/id (he got this info from
> spreadsheet that I've linked below).
> 
> So here is my output of flashrom (I've tried both the svn version and
> the one shipped with ubuntu packages w/ identical results):
> http://paste.flashrom.org/view.php?id=2658
> 
> 
> The chip's datasheet should be this one:
> http://www.macronix.com/Lists/Datasheet/Attachments/1587/MX25L12835F,%203V,%20128Mb,%20v1.3.pdf
> On page 7 you can see the pin-out. The chip type I have has 16 (= 8x2)
> pins. There are several NC labels in the pin-out therefore I didn't
> connect those.
> 
> For the rest of the connections I followed this site:
> http://flashrom.org/Bus_Pirate  (because I use a bus pirate w/
> hardware version 3.6 ).
> The chip itself is directly attached to a pomona 5252 (SOIC-16) test clip.
> 
> What follows are some pics of my setup + chip.
> 
> Any hints and help would be very much appreciated because I am kind of stuck.
> 
> Ps. Today I discovered something interesting in the spreadsheet; the
> 10 (from -10g suffix) stands for  10: 104MHz . Do I need to set
> spispeed to a higher level b/c of this?
> 
> Thx again
> 
> - - - IMAGES - - -
> 
> Macronix MX25L12835FMI-10G chip (16 pins): http://postimg.org/image/y7ykedq6r/
> Pomona soic-16 test clip 5252 : http://postimg.org/image/gqru9oum7/
> Bus pirate hw version 3.6 : http://postimg.org/image/80a7zp0ub/
> Test clip + chip, direction (where point is):
> http://postimg.org/image/koc4h655d/
> Chip attached: http://postimg.org/image/4ywrbnnst/

As discussed on IRC, this is probably caused by bad connections or not
enough power supplied to the chip. The frequency stated for flash chip
is a maximum and slower programmers work fine (most mainboards do not
use more than ~50 MHz either).

-- 
Kind regards/Mit freundlichen Grüßen, Stefan Tauner