Re: loading memory_cs.o instead of ide-cs.o !?!?

I wrote:

> my system (linux-2.4.20 /w Linux PCMCIA Card Services 3.2.4) sometimes 
> (e.g. after warm start) tries to load memory_cs.o (or even sram_mtd.o) 
> instead of ide-cs.o for some PCMCIA flash disks!
> 
> A SanDisk is working fine. But a "SipleTech 90MB ATA Flash Storage" 
> shows this problem!
> 
> Anyone any idea? Or seen that before?

I might have found the problem!

The troublemaking SimpleTech cards do know a "True IDE Mode" which is 
activated if -OE is kept low. If -OE is high during power-up the card 
will come up in "normal" IO/Memory-Mode.

I found out that these cards only have a weak internal pull-up 
(~100k). So apparently in conjunction with our buffers drivers (with 
integrated Bus-Hold-Technology) the -OE signal is not pulled high 
(enough). So the card tries to start in "True IDE Mode" which of 
course confuses the PCMCIA CS, i.e. getting garbage while reading CIS 
and thus trying "Anonymous Memory".

Adding a strong external pull-up on -OE solved the problem!

Thanks.

Steven



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