Re: [flashrom] Trying to flash a Winbond W25Q64.W on CH341A with 1.8V, adapter

[Miklos Marton]

Hi Marius,

A few days ago Nico suggested for a similar issue the following:

/You probably didn't connect all pins of the flash chip. You have to pull 
/HOLD and /WP high (connect them to 3V3, preferably through some 
resistor) to succeed. /

Best regards,
Miklos Marton

2017-09-23 12:00 keltezéssel, [e-mail] írta:
> Hi,
>
> ??I recently bought two VMAC V1 Mini PC's with Winbond W25Q64FWSIG EFI chips. Updating the EFI information on teh devices using the normal software route is extremely flakey and I managed to corrupt the EFI on both boards, making them unbootable.
>
> I now have a Chinese CH341a ("Black Edition") usb programmer and a "piggy-back" 1.8v adapter and can connect to the Winbond chip using a test clip.
>
> I installed flashrom from the debian package V0.99 and can do a:
>
> Initially, I thought I had problems getting?the?clip properly seated, but no matter?how much I clean the contacts and re-seat the clip, if I do a:
> ?#flashrom -p ch341a_spi -V
>
> I get (randomly):
> Found Winbond flash chip "unknown Winbond (ex Nexcom) SPI chip" (0 kB, SPI) on ch341a_spi.
> Found Generic flash chip "unknown SPI chip (RDID)" (0 kB, SPI) on ch341a_spi.
> Found Winbond flash chip "W25Q64.W" (8192 kB, SPI) on ch341a_spi.
>
> Finding the correct chip or not seems to have little or nothing to do with the physical contact to the chip.
> If I then try to erase the chip. I get:
>
> ? # flashrom -p ch341a_spi -c W25Q64.W -E
> flashrom v0.9.9-r1954 on Linux 4.10.1-towo.1-siduction-amd64 (x86_64)
> flashrom is free software, get the source code at https://flashrom.org
>
> Calibrating delay loop... OK.
> Found Winbond flash chip "W25Q64.W" (8192 kB, SPI) on ch341a_spi.
> Erasing and writing flash chip... FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x00000fff: 0x1000
> ERASE FAILED!
> Reading current flash chip contents... done. Looking for another erase function.
> FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x00007fff: 0x53cb
> ERASE FAILED!
> Reading current flash chip contents... done. Looking for another erase function.
> FAILED at 0x00000000! Expected=0xff, Found=0xd6, failed byte count from 0x00000000-0x0000ffff: 0x9264
> ERASE FAILED!
> Reading current flash chip contents... done. Looking for another erase function.
> FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x007fffff: 0x5e1391
> ERASE FAILED!
> Reading current flash chip contents... done. Looking for another erase function.
> FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x007fffff: 0x5ce187
> ERASE FAILED!
> Looking for another erase function.
> No usable erase functions left.
> FAILED!
> Your flash chip is in an unknown state.
> Please report this on IRC at chat.freenode.net (channel #flashrom) or
> mail [e-mail], thanks!
>
> Again, the hex codes for the failures seem pretty random and are different each time I try the command.
>
> I attach the log.
>
> ??Can anyone say what's going on?
>
> ?Best Regards
>
> Marius
>
> End of flashrom Digest, Vol 100, Issue 15
> *****************************************