rtsx(4)

rtsx4

Realtek sd card reader

Usage

rtsx* at pci? sdmmc* at rtsx?

Overview

The rtsx driver provides support for the Realtek RTS5209, RTS5227, RTS5229, RTS522A, RTS5249, RTS525A, RTL8402, RTL8411, and RTL8411B SD card readers.

The sdmmc(4) subsystem performs SD/MMC transactions to communicate with SD or SDHC devices inserted into the SD slot.

Releases

29 releases since OpenBSD 5.3; the text changed 7 times.

  1. 5.3
  2. 5.4
  3. 5.5
  4. 5.6
  5. 5.7
  6. 5.8–5.9
  7. 6.0–6.1
  8. 6.2–8.0

History

The rtsx driver first appeared in OpenBSD 5.3.

Authors

The rtsx driver was written by Stefan Sperling ⟨[email protected]⟩.

Bugs

The rtsx driver does not support MS (Memory Stick) and xD (Extreme Digital) devices even though the hardware supports them.

Support for SDIO interrupts is not implemented.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.