ohci(7D)							      Devices								  ohci(7D)

NAME

       ohci - OpenHCI host controller driver

SYNOPSIS

       usb@unit-address

DESCRIPTION

       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 Semiconductor.

       The ohci driver supports bulk, interrupt, control and isochronous transfers.

FILES

       /kernel/drv/ohci

	   32-bit x86 ELF kernel module

       /kernel/drv/amd64/ohci

	   64-bit x86 ELF kernel module

       /kernel/drv/sparcv9/ohci

	   64-bit SPARC ELF kernel module

       /kernel/drv/ohci.conf

	   driver configuration file

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-------------------------------+
       |      ATTRIBUTE TYPE	     |	     ATTRIBUTE VALUE	     |
       +-----------------------------+-------------------------------+
       |Architecture		     |SPARC, x86, PCI-based systems  |
       +-----------------------------+-------------------------------+
       |Availability		     |SUNWusb			     |
       +-----------------------------+-------------------------------+

SEE ALSO

       attributes(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

       http://www.sun.com/io

DIAGNOSTICS

       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, con-
	   tact your system vendor.

       No SOF interrupts have been received. This OHCI USB 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.

SunOS 5.10							    11 Oct 2004 							  ohci(7D)