---
name: "ohci"
section: "4freebsd"
platform: "linux"
package: "freebsd-manpages"
version: "12.2-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ohci/4freebsd"
---

# ohci(4freebsd)

OHCI USB Host Controller driver

## NAME

**ohci** – OHCI USB Host Controller driver

## SYNOPSIS

**device ohci**

## DESCRIPTION

The **ohci** driver provides support for OHCI-type PCI based USB controllers.

## HARDWARE

The **ohci** driver supports all OHCI v1.0 compliant controllers including:

- AcerLabs M5237 (Aladdin-V)

- AMD-756

- OPTi 82C861 (FireLink)

- NEC uPD 9210

- CMD Tech 670 (USB0670)

- CMD Tech 673 (USB0673)

- NVIDIA nForce3

- Sun PCIO-2 (RIO USB)

## SYSCTL VARIABLES

The following variables are available as both [sysctl(8)](/sysctl/8.md) variables and [loader(8)](/loader/8.md) tunables:

- *hw.usb.ohci.debug*

  Debug output level, where 0 is debugging disabled and larger values increase debug message verbosity. Default is 0.

## SEE ALSO

[ehci(4)](/ehci/4.md), [uhci(4)](/uhci/4.md), [xhci(4)](/xhci/4.md)

## HISTORY

The **ohci** device driver first appeared in FreeBSD 3.0.

## AUTHORS

The **ohci** driver was written by Lennart Augustsson ⟨*augustss@carlstedt.se*⟩ for the NetBSD project.