USB Host and MMC/SD Card Stack

Sebastian Huber sebastian.huber at
Wed Jun 17 11:07:03 UTC 2015

On 16/06/15 21:28, Martin Galvan wrote:
> Sebastian Huber <sebastian.huber at> wrote:
>> Which USB and MMC/SD card hardware modules has this chip?  Are they standard modules, e.g. EHCI, SDHC or something like this?
>  From what I saw, the USB module on the Beaglebone Black is built
> around the Mentor musbmhdrc USB OTG controller, which is not EHCI or
> OHCI compliant. The MMC/SD module is mostly compliant with SDHCI, with
> a few quirks.

Is this Mentor USB stuff supported by FreeBSD?  Writing a new USB 
host/OTG driver is a major task.

Sebastian Huber, embedded brains GmbH

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