[U-Boot-Users] cfi_flash.c

[Tolunay Orkun]

We are using this driver with CSB272 and CSB472 (both PPC405 
based boards).

The driver works OK on CSB272 where flash is setup as 2 side-by-
side chips each x16 and accessed via a 32 bit CS.

However, on CSB472 we have some apparently minor issue 
somewhere. The flash is setup as 1 chip of x16 and accessed via a 
16 bit chip select. The protect on/off, erase commands work well. cp 
command also work OK but after the flash write is completed it 
leaves the flash array in command mode instead of returning to 
read mode.

The workaround for now is to reset the board after programming or 
issue a protect on/off command.

The flash chip is an Intel 28F640 and I've sync to U-Boot CVS last 
monday.

Has anyone seen this problem, made a patch? I've posted about 
this before a few months ago but there was more pressing issues to 
deal with. If someone has solved this problem and a patch is in 
pipeline, I would like to try it otherwise I need to get my hands dirty 
to find out why the array is left in command mode.

Best regards,
Tolunay