Ricoh PCI to SD device?

[Sam Lawrance]

On 11/01/2006, at 4:34 PM, M. Warner Losh wrote:

> In message: <20060109183738.GA4822 at odin.ac.hmc.edu>
>             Brooks Davis <brooks at one-eyed-alien.net> writes:
> : On Mon, Jan 09, 2006 at 11:12:30AM -0500, David Gilbert wrote:
> : > Has anyone had a look at the following:
> : >
> : > none1 at pci3:1:2: class=0x080501 card=0x01aa1028 chip=0x08221180  
> rev=0x17 hdr=0x00
> : >     vendor   = 'Ricoh Co Ltd'
> : >     device   = 'SD Bus Host Adapter'
> : >     class    = base peripheral
> : >
> : > This shows up on my new Dell XPS-170 laptop.  Since there is no  
> USB
> : > attachment for the SD card reader, I can only surmise that this is
> : > it.  Is someone looking at this, or is this completely new?
> :
> : People are looking at it, but there are no docs available.   
> Apparently,
> : there is some work being done to reverse engineer it.  Linux doesn't
> : support it either.
>
> It does support the SDA Standard SD Host Adapter Interface.  However,
> The standard costs $1000 (if you are a member of the SD Association,
> which I think is $1800 a year), and comes with an NDA so restrictive
> that you'll be lucky to release a binary only version of your driver.
>
> I'm working on a port of FreeBSD to an embedded platform.  For that
> platform, we'll need to read data from MMC/SD cards.  To do that,
> we'll need a mmc/sd disk driver, a mmc/sd bus and a mmc/sd bridge.
> This should give us a fairly good architecture to write a bridge
> driver for the SDA Standard SD Host Adapter Interface should someone
> ever figure out the interface.  Tantalizing clues are available for
> the dilligent searcher on the web (the wikipedia entry for SD cards is
> especially enlightening).  I have no plans to implement a the standard
> SD interface.

Apparently there are linux patches which work with some SD host  
controllers.  Maybe these will be useful:

http://www.martinhenze.de/2006/02/04/sd-card-reader-and-ubuntu-linux/
http://list.drzeus.cx/pipermail/sdhci-devel/2006-January/000347.html

(gleaned from SLUG IRCers)