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 flashrom@flashrom.org, 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