Re: internal card reader support

From: Bill Davidsen
Date: Thu Dec 16 2004 - 12:27:06 EST

Felix Dorner wrote:

My notebook (hp nx9105) has an integrated 5in1 card-reader. I would really like to use this with linux.
Since I do not think it is supported yet, I d like to know if it might be possible to write a module or so for this.
I am just an average C programmer, but always wanted to dive into kernel developement. My knowledge on computer architecture is also no more than basic, so this might be something to really learn a lot...
So I start at zero knowledge now. First of course I need to find out if what I want to do is possible at all.
This means now to identify the hardware inside and see if I can get documents for that.

First I just start with:

0000:02:04.0 CardBus bridge: Texas Instruments: Unknown device ac54 (rev 01)
0000:02:04.1 CardBus bridge: Texas Instruments: Unknown device ac54 (rev 01)
0000:02:04.2 System peripheral: Texas Instruments: Unknown device 8201 (rev 01)

This is all that I have. Now I am already confused. My box has one PCMCIA slot. Which is now the PCMCIA and which is the CardReader? What about the third device? Might this be the integrated infrared controller?

Can you give me any hints/tips where to start best, what to read first?

I know this seems to be very difficult, but I have quite some free time that I don't want to spend playing bzflag all night long, so I think this is a great way to learn something.

The first question is if this shows up as USB (therefore SCSI), or IDE. I had an old desktop with PCMCIA and it all used the IDE driver. I'm interested, I'd love to use the slot on my Acer!

-bill davidsen (davidsen@xxxxxxx)
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at