1.\" $OpenBSD: dwmshc.4,v 1.1 2023/04/19 00:07:21 dlg Exp $ 2.\" 3.\" Copyright (c) 2023 David Gwynne <dlg@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: April 19 2023 $ 18.Dt DWMSHC 4 19.Os 20.Sh NAME 21.Nm dwmshc 22.Nd Synopsys DesignWare Mobile Storage Host Controller 23.Sh SYNOPSIS 24.Cd "dwmshc* at fdt?" 25.Cd "sdmmc* at dwmshc?" 26.Sh DESCRIPTION 27The 28.Nm 29driver provides support for the Synopsys DesignWare Mobile Storage 30Host Controller core. 31This core is used on the Rockchip RK3566 and RK3568 32.\" and RK3588 33SoCs as the eMMC controller. 34.Pp 35The Synopsys DesignWare Mobile Storage Host Controller core implements 36the SD Host Controller Standard Simplified Specification, but 37requires non-standard support for high clock rates. 38.\" The 39.\" .Nm 40.\" driver is a wrapper around the 41.\" .Xr sdhc 4 42.\" driver. 43.Pp 44The 45.Xr sdmmc 4 46subsystem performs SD/MMC transactions to communicate with the 47MMC/SD/SDIO devices connected to the controller. 48.Sh SEE ALSO 49.Xr intro 4 , 50.Xr sdhc 4 , 51.Xr sdmmc 4 52.Sh HISTORY 53The 54.Nm 55driver first appeared in 56.Ox 7.4 . 57