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SubjectRe: internal card reader support
On Wed, 2004-12-08 at 18:01 +0000, Felix Dorner wrote:
> Hi,
> 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:
> #lspci
> [...]
> 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)
> [...]

Looks like the card reader is part of the PC Card chip. I have a similar
setup om my laptop. I never managed to get it working. But maybe things
changed and newer PC Card brigdes have a card reader which act as a USB
device. I have a Ricoh controller on my laptop:

00:09.0 CardBus bridge: Ricoh Co Ltfd RL5c476 II (rev 88)
00:09.1 CardBus bridge: Ricoh Co Ltfd RL5c476 II (rev 88)
00:09.2 System peripheral: Ricoh Co Ltd: Unknown device 0576 (SD Card

> 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.

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