User manual

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3.4.2 SD/MMC Driver
Figure 15: Working Principle of SD/MMC
The SD/MMC card drivers under a Linux system typically include four parts
- SD/MMC core, mmc_block, mmc_queue and SD/MMC driver;
 SD/MMC core implements the structure independent core code in
SD/MMC related operations;
 mmc_block implements the driver structure used when SD/MMC
cards work as block devices;
 mmc_queue implements management of the request queue;
 SD/MMC driver implements the controller drivers;
Reference
linux-2.6.32-sbc8140/drivers/mmc/
linux-2.6.32-sbc8140/drivers/mmc/host/omap_hsmmc.c