[flashrom] Re: Help !

[Buhrow, Simon]

Hi,

a possible problem could be signal integrity. That is: your wiring might cause/catch to much noise (s. below).

Here some hints:

# For electrical issues:
Do read operation several times and check for equality.
                Touch the cable/wires before starting a new read operation. Just to check whether contacts are good.
If all reads give you the same file there shouldn´t be any problem at electrical level.
If you get diffs between the files you have an electrical problem -> check contacts, use as short wires as possible and try a lower frequency (if programmer supports this, do not overvalue the impact of frequency on total programming time, for some programmers most of the time is lost on other stages like usb communication etc.).

https://www.flashrom.org/Board_Testing_HOWTO

Hope this helps,

Simon

Von: Guillaume Rallon 
Gesendet: Freitag, 11. März 2022 11:27
An: [e-mail]
Betreff: [flashrom] Help !

Hello,

I request your help for a little problem.
I try to unbrick my MSI Gaming 5 Z97 motherboard, using flashrom using a raspberry Pi 4b vi the JSPI1 port.

I plugged it like this  :

Hold 0V      o     o    WP 3.3V
                       x     o
                       o     o    GND
          CLK      o     o    CS
       SI-SO      o     o    SO-SI
                       o     o     VCC

The plugin seems to be good as Flashrom detects the chipset as a Winbond W25Q64.V
The battery of the mother board is removed, no other external current source plugged.

When I launch the writing sequence everything  goes flawlessly and the problem appears during the flash verification. I receive this message : Verifying flash... FAILED at 0x00000014! Expected=0x03, Found=0x02, failed byte count from 0x00000000-0x007fffff: 0x3d6c96
Your flash chip is in an unknown state.

I tried to put HOLD at 3.3V and let the CMOS battery but it is always the same message.
Maybe my chipset has an internal defect ? If yes, I think I can buy a new chip and solder it but it's a brutal solution ;)

I would really be pleased if you could give me at least a clue.

Best regards

Guillaume RALLON

The whole messages are below :

flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=512 -w /home/Yogiadmin/flashrom/E7917IMS.190
flashrom v1.2-644-g79e2bd0 on Linux 5.10.92-v8+ (aarch64)
flashrom is free software, get the source code at https://flashrom.org

Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Winbond flash chip "W25Q64.V" (8192 kB, SPI) on linux_spi.
Reading old flash chip contents... done.
Erasing and writing flash chip... Erase/write done.
Verifying flash... FAILED at 0x00000014! Expected=0x03, Found=0x02, failed byte count from 0x00000000-0x007fffff: 0x3d6c96
Your flash chip is in an unknown state.
Please report this to the mailing list at [e-mail] or
on IRC (see https://www.flashrom.org/Contact for details), thanks!