My system is Debian GNU/Linux Kernel 2.6.22-3-686
below is the last two lines of lspci which says about mmc card drive..

0a:09.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
0a:09.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)

shyam:/home/shyam# dmesg | grep "tifm"
tifm_core: MemoryStick card detected in socket 0:0
shyam:/home/shyam# dmesg | grep "card"
PCI: Bus 11, cardbus bridge: 0000:0a:09.0
isapnp: Scanning for PnP cards...
tifm_core: MemoryStick card detected in socket 0:0
shyam:/home/shyam# dmesg | grep "MMC"
PCI: Using MMCONFIG