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sdhci.4freebsd

Langue: en

Autres versions - même langue

Version: 361855 (ubuntu - 24/10/10)

Section: 4 (Pilotes et protocoles réseau)


BSD mandoc

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.conf5:

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

DESCRIPTION

The 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 removing.

HARDWARE

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

SEE ALSO

mmc(4), mmcsd(4)
"SD Specifications, Part 2, SD Host Controller, Simplified Specification"

AUTHORS

An Alexander Motin Aq mav@FreeBSD.org .

BUGS

Many of existing SD controller chips have some nonstandard requirements, proprietary registers and hardware bugs, requiring additional handling. ENE chips are handled to work fine, while some revisions of RICOH and TI controllers still don't see cards without some additional initialization.
Il faut, autant qu'on peut, obliger tout le monde :
On a souvent besoin d'un plus petit que soi.
-+- Jean de La Fontaine (1621-1695),
Le Lion et le Rat (Fables II.11) -+-