sdhc(4) [netbsd man page]
SDHC(4) BSD Kernel Interfaces Manual SDHC(4) NAME
sdhc -- SD Host Controller SYNOPSIS
sdhc* at pci? sdhc* at cardbus? function ? sdmmc* at sdhc? DESCRIPTION
The sdhc driver provides support for SD controllers following the SD Host Controller Standard Simplified Specification. The sdmmc(4) subsystem performs SD/MMC transactions to communicate with whatever MMC, SD, SDHC, or SDIO devices are inserted into the SD slot. SEE ALSO
intro(4), sdmmc(4) HISTORY
The sdhc driver was written by Uwe Stuehler <uwe@openbsd.org> for OpenBSD and ported to NetBSD by NONAKA Kimihiro <nonaka@netbsd.org>. BSD
April 21, 2009 BSD
Check Out this Related Man Page
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