FT(2)232H Dual/Quad SPI about flashrom

[c0d3z3r0]

One year is over, so it's time for a new comment :'D
Sync FIFO requires the RD and WR pins to be driven... so that is not possible.

[dhendrix]

I took a quick look at the FT2232H datasheet (http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT2232H.pdf) and didn't see a way to reconfigure the IO pins to work together to transfer bits in a single direction. I think the hardware support is simply lacking for that programmer.

LMK if you spot anything that might be of use, otherwise we can close this issue.

[c0d3z3r0]

Hi, I am sorry for the delay.
Since flashrom uses bitbang mode I think it wouldn't be that hard to add optional one/three more IO pins. (EDIT: After reading some more in the data sheet I'm not sure about this anymore.)

However, it seems FT(2)232H's FT1248 mode is exactly what we're looking for as it implements SPI with 1-8 bit wide data transfer but I have no clue what to do with that MISO input...

Page 22 here:
http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232H.pdf

and this one:
http://www.ftdichip.com/Support/Documents/AppNotes/AN_167_FT1248_Parallel_Serial_Interface_Basics.pdf

[deeplyarnab]

For FT2232H, can we implement it using Sync FIFO mode?
Page 14 & 27 Specifies Clock output Frequency in this mode as 60MHz so should work with QSPI supported chips (W25Q128FV itself supports 104MHz). Bitbang or the MPSSE protocol should be a painful option with 30Mhz or lower clocks & adaptive clock (if I'm not missing something).

[saraazizi76]

i have a problem . i wanna use ft2232_spi programmer , but when i connect this programmer to my laptop and run this command "./flashrom -r ../output_EEPROM -p ft2232_spi" in the terminal i got this error"Unable to open FTDI device: -3 (device not found).
Error: Programmer initialization failed."

Hi, I am sorry for the delay.
Since flashrom uses bitbang mode I think it wouldn't be that hard to add optional one/three more IO pins. (EDIT: After reading some more in the data sheet I'm not sure about this anymore.)

However, it seems FT(2)232H's FT1248 mode is exactly what we're looking for as it implements SPI with 1-8 bit wide data transfer but I have no clue what to do with that MISO input...

Page 22 here:
http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232H.pdf

and this one:
http://www.ftdichip.com/Support/Documents/AppNotes/AN_167_FT1248_Parallel_Serial_Interface_Basics.pdf