Hi,
I already designed an iMX6D board that boot successfuly from the Macronix MX25L4006EZUI-12G Quad SPI NOR flash.
I just designed a new iMX6D board with the Winbond W25Q128FVSIG Quad SPI NOR flash, but the CPU refuses to read it during the boot - as a respond to the 'sf probe' command i get the following answer:
SF: Unsupported flash IDs: manuf ef, jedec 4018, ext_jedec 0000 !
Failed to initialize SPI flash at 0:21248
I found in the reference manual the following phrase:
'For QUAD mode boot, the Boot ROM expects the Quad Enable bit inside the QSPI Flash
to be already set before booting starts. Therefore, the QUAD enable bit must be set in the
non-volatile register of the flash at the time of programming.'
I wonder if this may be the answer to my problem? meaning, the Winbond flash datasheet says that the Quad Enable bit is '0' by default. the Macronix doesn't mention this issue, but may be its Quad Enable bit is '1' by default. I also found that Winbond has other version of this flash that its Quad Enable bit is '1' by default.
Any help will be appreciated.
SF: Unsupported flash IDs: manuf ef, jedec 4018, ext_jedec 0000
Failed to initialize SPI flash at 0:21248
