Synopsys DesignWare Memory Card Interface

modulename: dw_mmc.ko

configname: CONFIG_MMC_DW

Linux Kernel Configuration
└─>Device Drivers
└─>MMC/SD/SDIO card support
└─>Synopsys DesignWare Memory Card Interface
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
This selects support for the Synopsys DesignWare Mobile Storage IP
block, this provides host support for SD and MMC interfaces, in both
PIO and external DMA modes.

source code:
drivers/mmc/host/dw_mmc.c