原本以為筆記型電腦的sd slot是透過 mmc host controller 拉出，不過目前看起來大部分的筆記型電腦已經由usb host controller 直接轉出來居多了。
- Ricoh memory card reader in Ubuntu
http://mydebian.blogdns.org/?p=243
【參考】
- SD和MMC记忆卡介面技术
http://www.biplip.com/default.aspx?mid=361&ctl=View&ItemId=421 - Fonera SD Card Hack
http://www.larsen-b.com/Article/262.html - Spec
http://www.sdcard.org/developers/tech/sdio/sdio_spec/Simplified_SDIO_Card_Spec.pdf - Writing Modern Linux SDIO Drivers
http://www.varsanofiev.com/inside/WritingLinuxSDIODrivers.htm - CISinfo
http://www.tssc.de/products/cardware/cisinfo/ - Linux 的 SDIO Stack
http://www.jollen.org/blog/2006/12/linux_sdio_stack_open_source.html
