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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

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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 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 don't see cards without some additional initialization. BSD
January 14, 2009 BSD
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