1.\" 2.\" Copyright (c) 2007 M. Warner Losh 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. The name of the author may not be used to endorse or promote products 11.\" derived from this software without specific prior written permission. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd October 8, 2008 28.Dt MMC 4 29.Os 30.Sh NAME 31.Nm mmc 32.Nd MultiMediaCard and SD Card bus driver 33.Sh SYNOPSIS 34.Cd device mmc 35.Sh DESCRIPTION 36The 37.Nm 38driver implements the MMC and SD Card bus. 39The 40.Nm 41driver supports all MMC and SD bridges in the system. 42All SD or MMC cards in the system attach to an instance of 43.Nm . 44The 45.Nm 46bus typically has only one slot, and only memory cards. 47MultiMediaCards exist only in memory. 48SD Cards exist as memory, I/O, or combination cards. 49.Sh SEE ALSO 50.Xr at91_mci 4 , 51.Xr mmcsd 4 , 52.Xr sdhci 4 53.Rs 54.%T "SD Specifications, Part 1, Physical Layer, Simplified Specification" 55.Re 56.Rs 57.%T "The MultiMediaCard System Specification" 58.Re 59.Sh BUGS 60SDIO cards currently do not work. 61