---
name: "bcmsdhost"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/bcmsdhost"
---

# bcmsdhost(4)

Broadcom BCM238x SD controller

## NAME

**bcmsdhost** – Broadcom BCM238x SD controller

## SYNOPSIS

**bcmsdhost\* at fdt?** **sdmmc\* at bcmsdhost?**

## DESCRIPTION

The **bcmsdhost** driver provides support for the SD controllers integrated on Broadcom BCM283x and BCM2711 SoCs. The driver uses the [bcmdmac(4)](/bcmdmac/4.md) DMA controller to provide DMA support.

The [sdmmc(4)](/sdmmc/4.md) subsystem performs SD/MMC transactions to communicate with whatever SD devices are inserted into the card slot or directly connected to the controller.

## SEE ALSO

[bcmdmac(4)](/bcmdmac/4.md), [intro(4)](/intro/4.md), [sdmmc(4)](/sdmmc/4.md)

## HISTORY

OpenBSD support for **bcmsdhost** first appeared in OpenBSD 6.7.

## AUTHORS

The **bcmsdhost** driver was written by Jared D. McNeill for NetBSD and ported to OpenBSD by Neil Ashford ⟨*ashfordneil0@gmail.com*⟩ and Tobias Heider ⟨*tobhe@openbsd.org*⟩.