Re: Bug in pcmcia-core

From: James Courtier-Dutton
Date: Fri Jun 17 2005 - 02:37:04 EST

Wakko Warner wrote:
> James Courtier-Dutton wrote:
>>I am trying to write a Linux ALSA driver for the Creative Audigy 2 NX
>>Notebook PCMCIA card.
>>This is a cardbus card, that uses ioports.
>>When it is inserted into the laptop, the entry appears in "lspci -vv "
>>showing ioports used by the card.
>>As soon as my driver uses "outb()" to anything in the address range
>>shown in "lspci -vv" , the PC hangs.
>>I can only conclude from this that ioport resources are not being
>>allocated correctly to the PCMCIA card.
>>Can anybody help me track this down. If someone could tell me which
>>PCMCIA and PCI registers should be set for it to work, I could then find
>>out which pcmcia registers have not been set correctly, and fix the bug.
>>It seems that the PCMCIA specification is not open and free, so I cannot
>>refer to it in order to fix this myself.
> I thought drivers for the cardbus cards were the same as standard PCI cards.
> I know that as far as networking goes, the same driver runs a cardbus 3com
> 3c575 and the pci 3c905. Same with netgear's cardbus FA510 and PCI FA310.
> I'm not a kernel developer, but this is what I've understood.

That is also what I thought. But I think that the cardbus 3com 3c575
uses memory for io and not ioports. I think the problem is related to
the use of ioports on an cardbus card.

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