OHCI(7D)OHCI(7D)NAMEohci - OpenHCI host controller driver
The ohci driver is a USBA (Solaris USB Architecture) compliant nexus
driver that supports the Open Host Controller Interface Specification
1.1, an industry standard developed by Compaq, Microsoft, and National
The ohci driver supports bulk, interrupt, control and isochronous
32-bit x86 ELF kernel module
64-bit x86 ELF kernel module
64-bit SPARC ELF kernel module
driver configuration file
See attributes(5) for descriptions of the following attributes:
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
│Architecture │ SPARC, x86, PCI-based systems │
SEE ALSOattributes(5), ehci(7D), hubd(7D), uhci(7D), usba(7D)
Writing Device Drivers
Universal Serial Bus Specification 2.0
Open Host Controller Interface Specification for USB 1.0a
System Administration Guide: Basic Administration
All host controller errors are passed to the client drivers. Root hub
errors are documented in hubd(7D).
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> <ohci><instance number>>: Error message...
Unrecoverable USB Hardware Error.
There was an unrecoverable USB hardware error reported by the OHCI
Controller. Please reboot the system. If this problem persists,
contact your system vendor.
No SOF interrupts have been received. This OHCI USB controller is unus‐
The USB hardware is not generating Start Of Frame interrupts.
Please reboot the system. If this problem persists, contact your
The following messages may be entered into the system log. They are
formatted in the following manner:
<device path> <ohci<instance number>): Message...
Failed to program frame interval register.
For an unspecified reason, the frame interval register has been
nulled out by the Uli M1575 chip. Please reboot the system. If this
problem persists, contact your system vendor.
Nov 23, 2006 OHCI(7D)