In message <19990214131523.A7224@pyy.jmp.fi>  Jukka Marin wrote:
> On Sat, Feb 13, 1999 at 11:09:58AM +0100, Stefan Grefen wrote:
> > In message <19990212220617.A2617@pyy.jmp.fi>  Jukka Marin wrote:
> > > On Fri, Feb 12, 1999 at 08:43:52PM +0100, Stefan Grefen wrote:
> > > > I gues you have a PCI/cardbus bridge. AFAIK it doesn't turn on
> > > > VPP to 5V automaticly like the PCIC chip does.
> > > > If the card uses both as VCC the card is 'half' powered.
> > > > This is a problem with scandisk's (flash memory) too.
> > > 
> > > Do you mean SanDisk compact FLASH cards, perhaps?  They don't have
> > > any Vpp inputs at all.  All they need is +5V (or +3.3V) to the two
> > > Vcc pins (13 and 38 in the Compact FLASH connector).
> > 
> > They do have them
> 
> Ahem, sorry, but they don't. ;-)  See page 19 of CompactFlash Memory Card
> Product Manual (available from SanDisk).  No Vpp pins.
> 
> I also measured a CompactFlash->PCMCIA adapter and sure enough, the Vpp1
> and Vpp2 pins on the PCMCIA side are NOT connected to ANY of the Compact
> FLASH side pins.

I meant the PCMCIA side so if this is not connected, the adapter-card is coded
for 3.3V (VS1 aka pin.43 is connectd to ground).

> 
> 
> > I guess I have to try again. Maybe the card reports it's 3.3 V card
> > and the chip prevents the 5V power on. 
> 
> The registers show that the 5 V supply to the card is ON - and still the
> Interface Status register (0x01) reads 0x0c which means both the card
> detect inputs are active (card detected), but "Power to the card is not
> on" (bit6 = 0).
> 
> These are the register states I see on my TP310E:

...

> 
> If you have a patch that works on your system, I'd love to try it on mine.
> I'm running -current of 990131 (the one with broken 'ps' ;-)

I guess I figured it out now. But to make it work we have to support the
CardBus bridge. There seems to be a standard called Yenta for at least
the basic registers. I started working on a pcb (PciCarbusBridge) driver. 
It is not to complicated to support Pcmcia cards, and I get a CardBus
loaner so I can see if I can make it work. I don't see how CaradBus
can work in a dynamic way, because cards can have bridges and than
bus numbering falls flat on its face ... but we hopefully won't stumble
over this ... :-)

Stefan

> 
>   -jm
> 

--
Stefan Grefen                                Tandem Computers Europe Inc.
grefen@hprc.tandem.com                       High Performance Research Center
 --- Hacking's just another word for nothing left to kludge. ---