Devices                                                  ohci(7D)



NAME
     ohci - OpenHCI host controller driver

SYNOPSIS
     usb@unit-address


DESCRIPTION
     The ohci driver is a USBA (Solaris USB Architecture) compli-
     ant  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  iso-
     chronous 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


ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE                ATRIBUTE VALUE        
    
     Architecture                 SPARC, x86, PCI-based systems 
    
     Availability                 SUNWusb                       
    


SEE ALSO
     attributes(5), ehci(7D), hubd(7D), uhci(7D), usba(7D)


     Writing Device Drivers





SunOS 5.11          Last change: 23 Nov 2006                    1






Devices                                                  ohci(7D)



     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:  >: 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 con-
     troller is unusable.

         The USB hardware is not generating Start Of Frame inter-
         rupts.  Please  reboot  the system. If this problem per-
         sists, contact your system vendor.



     The following messages may be entered into the  system  log.
     They are formatted in the following manner:

        ): 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



SunOS 5.11          Last change: 23 Nov 2006                    2






Devices                                                  ohci(7D)



         system vendor.






















































SunOS 5.11          Last change: 23 Nov 2006                    3