1.\"- 2.\" Copyright (c) 2017 Emmanuel Vadot <manu@freebsd.org> 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 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.Dd October 20, 2025 26.Dt AW_MMC 4 27.Os 28.Sh NAME 29.Nm aw_mmc 30.Nd driver for the SD/MMC controller in Allwinner SoC 31.Sh SYNOPSIS 32.Cd "device mmc" 33.Sh DESCRIPTION 34The 35.Nm 36device driver provides support for the Allwinner SD/MMC host controller. 37.Sh HARDWARE 38The current version of the 39.Nm 40driver supports the SD/MMC controller with one of the following compatible strings : 41.Pp 42.Bl -bullet -compact 43.It 44allwinner,sun4i-a10-mmc 45.It 46allwinner,sun5i-a13-mmc 47.It 48allwinner,sun7i-a20-mmc 49.It 50allwinner,sun50i-a64-mmc 51.It 52allwinner,sun20i-d1-mmc 53.El 54.Sh SYSCTL VARIABLES 55The following read-only variables are available via 56.Xr sysctl 8 : 57.Bl -tag -width indent 58.It Va dev.aw_mmc.req_timeout 59Request timeout in seconds (default: 10) . 60.El 61.Sh SEE ALSO 62.Xr fdt 4 , 63.Xr mmc 4 64.Sh HISTORY 65The 66.Nm 67device driver first appeared in 68.Fx 10.0 . 69.Sh AUTHORS 70The 71.Nm 72device driver was originally written by 73.An Alexander Fedorov Aq Mt alexander.fedorov@rtlservice.com . 74Later work and this manual page was done by 75.An Emmanuel Vadot Aq Mt manu@freebsd.org . 76