PCMCIA CF Interrupt Problems

Stevens, Peter Peter.Stevens at GTECH.COM
Wed Dec 1 08:43:04 EST 2004

Hi Dave,

Thanks for your reply it's appreciated.

After my first post I did exactly what you have suggested. I went 

out and bought some different CF cards.

	* SanDisk 64mb
	* Lexar 128mb	(x12 speed)
	* SanDisk 256mb

And interestingly enough, the Lexar 128mb (x12) works like a charm. 

So, it's likely I have some sorta timing issue. I'm pretty sure I

know where to look. I compared functionality with the 2.6.8 kernel

which supports PXA27x systems and I noticed some differences in CPU

clock speed calculations.



-----Original Message-----
From: David Hinds [mailto:dhinds at sonic.net]
Sent: Tuesday, November 30, 2004 9:12 PM
To: Stevens, Peter
Cc: 'linux-pcmcia at lists.infradead.org'
Subject: Re: PCMCIA CF Interrupt Problems

On Mon, Nov 29, 2004 at 11:13:10AM -0500, Stevens, Peter wrote:
> My question is about the PCMCIA IDE driver. The IDE driver wants to
> re-allocate the interrupted used by Card Services, meaning that I
> must share the IRQ or the IDE probe function will fail. Hopefully,
> this is what is suppose to be happening here.


> With the PCMCIA IDE driver and Card Services sharing the IRQ I'm
> able to mount and read from my CF card. The problem is that I cannot
> write to the drive.  Additionally, if I run the 'df' command I end
> up getting an 'interrupt lost' message repeatedly.

I'm not sure what's going on here.  I don't know what would be special
about 'df' if reading the drive works; I'm kind of surprised that 'df'
even does any IO on a mounted filesystem.  Have you tried more than
one brand of CF card?

> I've seen other post with similar issues, but no real answers.

Where have you seen these similar reports, specifically?

> Also, I would like to try out the external cs-pcmcia package. But
> simple cross compile for ARM seems to fail ??

You can't use the pcmcia-cs drivers on this system.

-- Dave

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