On Wed, 4 Mar 2015 11:32:04 +0200 Urja Rannikko <urja...@gmail.com> wrote:
> Hi, > > > I've an idea. Maybe you've managed to switch the MX25L6445E into the > > "individual block protection mode" (read the datasheet page 30 - its > > an OTP, once done once its for good) and now it isnt actually > > erasing/writing anything at all (that 1M just happens to have > > succeeded previously) because flashrom currently doesnt know of the > > invidividual block unlock commands (or even the GBULK gang block > > unlock) and thinks everything is ok because the status register looks > > like unlocked. > > > > So maybe read the current contents into a file and modify a little bit > > in the erased area (eg. swap out the first 4k to random data*) and see > > if it writes. My theory is it wont. > > > > *here's example commands: > > flashrom <insert your parameters> -r current.bin > > dd if=/dev/urandom of=4krandom.bin bs=1024 count=4 > > dd if=current.bin bs=1024 skip=4 of=current-4.bin > > cat 4krandom.bin current-4.bin > modified.bin > > flashrom <parameters> -w modified.bin > > > > Somebody'd need to write a patch to flashrom to use the RDSCUR command > > to see if WPSEL is set to see for sure. But support for this wouldnt > > hurt anyways. I'll see if i have time later in the evening to make a > > prototype/test patch for this... > > I already had the datasheet open, so... here it is (in slightly crude form). > https://github.com/urjaman/flashrom/commit/b51f09e5f21bf14d492c7d006e0bdd869eee36b9 > there's the commit if somebody wants to just web see. > To test, in the flashrom-serprog git tree you have: > git pull > git checkout mx25l6445e-debug > make > ./flashrom ... Hi, was this ever tested? I have a MX25L25635F which is yet unsupported due to the larger address space etc. and I could test this eventually some time in the future... but I would prefer to get support for this into flashrom earlier than that (2016? :) -- Kind regards/Mit freundlichen Grüßen, Stefan Tauner _______________________________________________ flashrom mailing list flashrom@flashrom.org http://www.flashrom.org/mailman/listinfo/flashrom