ehci(7D)							      Devices								  ehci(7D)

NAME

       ehci - Enhanced host controller driver

SYNOPSIS

       usb@unit-address

DESCRIPTION

       The ehci driver is a USBA (Solaris USB Architecture) compliant nexus driver that supports the Enhanced Host Controller Interface Specifica-
       tion 2.0, an industry standard developed by Intel.

       The ehci supports bulk, interrupt, control  and	iso chronous transfers (on USB1.x devices behind a USB2.0 hub).

FILES

       /kernel/drv/ehci

	   32-bit ELF kernel module x86 platform

       /kernel/drv/sparcv9/ehci

	   64-bit SPARC ELF kernel module

       /kernel/drv/amd64/ehci

	   64-bit x86 ELF kernel module

       /kernel/drv/ehci.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

       add_drv(1M), prtconf(1M), update_drv(1M), attributes(5), hubd(7D), uhci(7D), ohci(7D), usba(7D)

       Writing Device Drivers

       Universal Serial Bus Specification 2.0

       Enhanced Host Controller Interface Specification 1.0

       System Administration Guide: Basic Administration

       http://www.sun.com/io

DIAGNOSTICS

       All host controller errors are passed to the client drivers. Root 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> <ehci><instance number>>: Error message...

       Due to recently discovered incompatibilities with this USB controller, USB2.x transfer support has been disabled. This device will continue
       to function as a USB1.x controller. If you are interested in enabling USB2.x support pleaserefer to the ehci(7D) man page.
       Please refer to www.sun.com/io for Solaris Ready products and to www.sun.com/bigadmin/hcl for additional compatible USB products.

	   To  enable  USB2.x suppport, a new and more specific driver alias (refer to add_drv(1M) and update_drv(1M)) must be specified for ehci.
	   By default, the ehci alias is 'pciclass,0c0320'.  The compatible names in the prtconf(1M) output provides additional aliases. For exam-
	   ple:

	   # prtconf -vp | grep pciclass,0c0320
		    compatible: 'pci1106,3104.1106.3104.2063' + 'pci1106,3104.1106.3104' + 'pci1106,3104' +
	   'pci1106,3104.2063' + 'pci1106,3104' + 'pciclass,0c0320' + 'pciclass,0c03'
	   ....

	   A more specific alias is 'pci1106,3104'. Perform the following step to add this alias, then reboot the system:

	   # update_drv -a -i '"pci1106,3104"' ehci

	   # devfsadm -i ehci

	   or reboot

       Connecting a high speed isochronous device to a high speed port is not supported.

	   Devices requiring high speed isochronous USB service, such as high speed audio/video devices, are not supported.

       Unrecoverable USB hardware error.

	   There  was  an  unrecoverable  USB hardware error reported by the ehci controller. Reboot the system. If this problem persists, contact
	   your system vendor.

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

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

       Please hotplug the 2.0 hub that this device is connected to.

	   A device error was detected. Remove and reinsert the external USB2.0 hub.

       ehci_init_ctlr: Revision XX is not supported.

	   High speed USB devices < revision .95 are not supported.

       ehci_init_ctrl: Unable to take control from BIOS.

	   High speed USB devices are not supported. In this case, Solaris was unable to take control of the USB hardware from the system's  BIOS.
	   Contact your system vendor or your system administrator for possible changes in BIOS settings. (x86 only.)

SunOS 5.10							    7 Dec 2004								  ehci(7D)