mmc(4) [freebsd man page]

MMC(4)							   BSD Kernel Interfaces Manual 						    MMC(4)

NAME

     mmc -- MultiMediaCard and SD Card bus driver

SYNOPSIS

     device mmc

DESCRIPTION

     The mmc driver implements the MMC and SD Card bus.  The mmc driver supports all MMC and SD bridges in the system.	All SD or MMC cards in the
     system attach to an instance of mmc.  The mmc bus typically has only one slot, and only memory cards.  MultiMediaCards exist only in memory.
     SD Cards exist as memory, I/O, or combination cards.

SEE ALSO

     at91_mci(4), mmcsd(4), sdhci(4)

     SD Specifications, Part 1, Physical Layer, Simplified Specification.

     The MultiMediaCard System Specification.

BUGS

     SDIO cards currently do not work.

BSD
								  October 8, 2008							       BSD

SDHCI(4)						   BSD Kernel Interfaces Manual 						  SDHCI(4)

NAME

     sdhci -- PCI SD Host Controller bridge driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device mmc
	   device mmcsd
	   device sdhci

     Alternatively, to load the driver as a module at boot time, place the following lines in loader.conf(5):

	   mmc_load="YES"
	   mmcsd_load="YES"
	   sdhci_load="YES"

DESCRIPTION

     The sdhci driver supports PCI devices with class 8 and subclass 5 according to SD Host Controller Specification.  Driver supports up to six
     high speed 4bit MMC/SD slots per controller.  Driver attaches mmc bus to the respective slot on card insertion and detaches it on card remov-
     ing.

HARDWARE

     The sdhci driver supports different specification compatible chips. The following chips have been verified to work:

     o	 ENE CB712
     o	 ENE CB714
     o	 RICOH R5C822
     o	 RICOH R5CE823
     o	 TI PCIXX21/XX11

SEE ALSO

     mmc(4), mmcsd(4)

     SD Specifications, Part 2, SD Host Controller, Simplified Specification.

AUTHORS

     Alexander Motin <mav@FreeBSD.org>

BUGS

     Many of existing SD controller chips have some nonstandard requirements, proprietary registers and hardware bugs, requiring additional han-
     dling.  ENE chips are handled to work fine, while some revisions of RICOH and TI controllers still do not see cards without some additional
     initialization.

BSD
								 February 9, 2012							       BSD