[flashrom] Issue with internal access to the W39V040FB

[Carl-Daniel Hailfinger]

Hi Andrey,

On 15.01.2016 15:33, Andrey Korolyov wrote:
> On Sun, Jan 3, 2016 at 9:44 PM, Andrey Korolyov <andrey at xdel.ru> wrote:
>>> >> Hi Andrey,
>>> >>
>>> >> please post complete logs of a working and non-working probe as well as
>>> >> the exact flashrom version you are using. The output of lspci -nnv
>>> >> might become handy as well.
>>> >>
>> >
>> >
>> > Thanks Stefan,
>> >
>> > even giving out a fact that I am very lucky to hit very twisted issues
>> > at all, this time it looks like chip eventually stopped to respond via
>> > an appropriate interface (slight voltage change? bit-flip during a
>> > board initialization? lack of a probe delay? ), so I think that the
>> > initial report could be incorrect, as the flash is not responding
>> > anymore even where is was supposed to. Nevertheless, the appropriate
>> > log and lspci output are attached, please take a look on them if they
>> > could be helpful.
> Got an another sample of the same board, because original was died
> from overheating during EEPROM resoldering procedure. Internal WRITE
> effectively bricked a board over cold reboot but I finally obtained
> logs with some possible usefulness. Should I check same random
> behavior as I reported previously after reflashing the chip
> externally? Unfortunate to me, the board layout strictly requires chip
> desoldering before I would be able to program it with anything,
> in-place attempts are failing even with external power source, but
> when de-soldered, chip flashes just perfectly via Minipro.
>
> flashrom v0.9.7-r1711 on NetBSD 7.0 (i386)
> flashrom is free software, get the source code at http://www.flashrom.org
>
> flashrom was built with libpci 3.3.0, GCC 4.8.4, little endian
> Command line (7 args): flashrom -p internal:laptop=this_is_not_a_laptop -c W39V040FB -r bios.bin -V
> Calibrating delay loop... OS timer resolution is 5 usecs, 166M loops per second, 10 myus = 14 us, 100 myus = 105 us, 1000 myus = 1004 us, 10000 myus = 10042 us, 20 myus = 24 us, OK.
> Initializing internal programmer
> [...]
> Found chipset "AMD CS5536" with PCI ID 1022:2080. Enabling flash write... No MSR support for your OS yet.
> FAILED!
> Warning: unexpected second chipset match: "AMD CS5536"
> ignoring, please report lspci and board URL to flashrom at flashrom.org
> with 'CHIPSET: your board name' in the subject line.

I suspect this may be part of the issue. Another suspicion is that older
NetBSD may automatically enable the MSRs we need, and later NetBSD
versions don't.

Regards,
Carl-Daniel