UHCI(4D) Devices UHCI(4D)

uhci - host controller driver


The uhci host controller driver is a USBA (Solaris USB Architecture) compliant nexus driver that supports the Universal Host Controller Interface Specification 1.1, an industry standard developed by Intel. The uhci driver supports all USB transfers, including interrupt, control, isochronous and bulk.


32-bit ELF kernel module. (SPARC or x86).


64-bit ELF kernel module. (x86).


64-bit SPARC ELF kernel module.


Driver configuration file.

See attributes(7) for descriptions of the following attributes:

Architecture SPARC or x86 PCI-based systems

ehci(4D), hubd(4D), ohci(4D), usba(4D), attributes(7)

Writing Device Drivers

Universal Host Controller Interface Specification for USB 1.1

Universal Serial Bus Specification 2.0

System Administration Guide: Basic Administration

All host controller errors are passed to the client drivers. Root errors are documented in hubd(4D).

In addition to being logged, the following messages may appear on the system console. All messages are formatted in the following manner:

WARNING: <device path> <uhci><instance number>>: Error message...

No SOF interrupts have been received. This USB UHCI host controller is unusable.

The USB hardware is not generating Start Of Frame interrupts. Please reboot the system. If this problem persists, contact your system vendor.

May 13, 2017 OmniOS