13722eb71SWarner Losh.\" 2f86e6000SWarner Losh.\" Copyright (c) 2007 M. Warner Losh <imp@FreeBSD.org> 33722eb71SWarner Losh.\" 43722eb71SWarner Losh.\" Redistribution and use in source and binary forms, with or without 53722eb71SWarner Losh.\" modification, are permitted provided that the following conditions 63722eb71SWarner Losh.\" are met: 73722eb71SWarner Losh.\" 1. Redistributions of source code must retain the above copyright 83722eb71SWarner Losh.\" notice, this list of conditions and the following disclaimer. 93722eb71SWarner Losh.\" 2. The name of the author may not be used to endorse or promote products 103722eb71SWarner Losh.\" derived from this software without specific prior written permission. 113722eb71SWarner Losh.\" 123722eb71SWarner Losh.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 133722eb71SWarner Losh.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 143722eb71SWarner Losh.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 153722eb71SWarner Losh.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 163722eb71SWarner Losh.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 173722eb71SWarner Losh.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 183722eb71SWarner Losh.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 193722eb71SWarner Losh.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 203722eb71SWarner Losh.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 213722eb71SWarner Losh.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 223722eb71SWarner Losh.\" SUCH DAMAGE. 233722eb71SWarner Losh.\" 24*cedaad93SFernando Apesteguía.Dd June 10, 2021 253722eb71SWarner Losh.Dt MMC 4 263722eb71SWarner Losh.Os 273722eb71SWarner Losh.Sh NAME 283722eb71SWarner Losh.Nm mmc 293722eb71SWarner Losh.Nd MultiMediaCard and SD Card bus driver 303722eb71SWarner Losh.Sh SYNOPSIS 313722eb71SWarner Losh.Cd device mmc 323722eb71SWarner Losh.Sh DESCRIPTION 333722eb71SWarner LoshThe 343722eb71SWarner Losh.Nm 353722eb71SWarner Loshdriver implements the MMC and SD Card bus. 363722eb71SWarner LoshThe 373722eb71SWarner Losh.Nm 383722eb71SWarner Loshdriver supports all MMC and SD bridges in the system. 393722eb71SWarner LoshAll SD or MMC cards in the system attach to an instance of 403722eb71SWarner Losh.Nm . 413722eb71SWarner LoshThe 423722eb71SWarner Losh.Nm 433722eb71SWarner Loshbus typically has only one slot, and only memory cards. 443722eb71SWarner LoshMultiMediaCards exist only in memory. 453722eb71SWarner LoshSD Cards exist as memory, I/O, or combination cards. 463722eb71SWarner Losh.Sh SEE ALSO 47923544aaSBaptiste Daroussin.Xr mmcsd 4 , 482202f7a1SAlexander Motin.Xr sdhci 4 493722eb71SWarner Losh.Rs 503722eb71SWarner Losh.%T "SD Specifications, Part 1, Physical Layer, Simplified Specification" 513722eb71SWarner Losh.Re 523722eb71SWarner Losh.Rs 533722eb71SWarner Losh.%T "The MultiMediaCard System Specification" 543722eb71SWarner Losh.Re 553722eb71SWarner Losh.Sh BUGS 563722eb71SWarner LoshSDIO cards currently do not work. 57