61 lines
2.0 KiB
Groff
61 lines
2.0 KiB
Groff
.\"
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.\" Copyright (c) 2007 M. Warner Losh
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 8, 2008
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.Dt MMC 4
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.Os
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.Sh NAME
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.Nm mmc
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.Nd MultiMediaCard and SD Card bus driver
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.Sh SYNOPSIS
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.Cd device mmc
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.Sh DESCRIPTION
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The
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.Nm
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driver implements the MMC and SD Card bus.
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The
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.Nm
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driver supports all MMC and SD bridges in the system.
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All SD or MMC cards in the system attach to an instance of
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.Nm .
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The
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.Nm
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bus typically has only one slot, and only memory cards.
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MultiMediaCards exist only in memory.
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SD Cards exist as memory, I/O, or combination cards.
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.Sh SEE ALSO
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.Xr at91_mci 4 ,
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.Xr mmcsd 4 ,
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.Xr sdhci 4
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.Rs
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.%T "SD Specifications, Part 1, Physical Layer, Simplified Specification"
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.Re
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.Rs
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.%T "The MultiMediaCard System Specification"
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.Re
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.Sh BUGS
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SDIO cards currently do not work.
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