umoscom(4)

umoscom4

Usb support for serial adapters based on chips made by moschip

Usage

device usb device ucom device umoscom

In loader.conf(5): umoscom_load="YES"

Overview

The umoscom driver provides support for various serial adapters based on chips from MOSCHIP.

The device is accessed through the ucom(4) driver which makes it behave like a tty(4).

Files

/dev/ttyU*

for callin ports

/dev/ttyU*.init
/dev/ttyU*.lock

corresponding callin initial-state and lock-state devices

/dev/cuaU*

for callout ports

/dev/cuaU*.init
/dev/cuaU*.lock

corresponding callout initial-state and lock-state devices

Releases

25 releases since FreeBSD 11.0-RELEASE; the text changed 12 times.

  1. 11.0
  2. 11.1
  3. 11.2
  4. 11.3
  5. 11.4
  6. 12.0
  7. 12.1
  8. 12.2
  9. 12.3
  10. 12.4
  11. 13.0–13.2
  12. 13.3–15.1
  13. 16.0

History

The umoscom driver appeared in OpenBSD and was ported to FreeBSD.

From base 16.0-CURRENT-20261027-61c70dc16a79 in FreeBSD 16.0-CURRENT (2026-10-27). Parsed by carta from the page's mdoc source.