Devices ehci(7D)
NAME
ehci - Enhanced host controller driver
SYNOPSIS
usb@unit-address
DESCRIPTION
The ehci driver is a USBA (Solaris USB Architecture) compli-
ant nexus driver that supports the Enhanced Host Controller
Interface Specification 2.0, an industry standard developed
by Intel.
A USB 2.0 host controller includes one high-speed host con-
troller and zero or more USB 1.1 host controllers. The
high-speed host controller implements an EHCI (Enhanced Host
Controller Interface) that is used for all high-speed com-
munications to high-speed-mode devices.
All USB 2.0 devices connected to the root ports of the USB
2.0 host controller and all devices connected to a high-
speed-mode hub should be routed to the EHCI host controller.
All full- and low-speed devices connected to the root ports
of the USB 2.0 host controller should be routed to the com-
panion USB 1.1 host controllers. (OHCI or UHCI host con-
troller).
The ehci supports bulk, interrupt, control and iso chro-
nous transfers (on USB1.x devices behind a USB2.0 hub).
FILES
/kernel/drv/ehci 32-bit ELF 86 kernel module
/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
ATRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
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Devices ehci(7D)
ATRIBUTE TYPE ATRIBUTE VALUE
Architecture SPARC, x86, PCI-based systems
Availability SUNWusb
SEE ALSO
adddrv(1M), prtconf(1M), remdrv(1M), updatedrv(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.usb.org
http:/www.sun.com/io
http:/www.sun.com/bigadmin/hcl
http:/www.intel.com/technology/usb/ehcispec.htm
DIAGNOSTICS
In addition to being logged, the following messages may
appear on the system console. All messages are formatted in
the following manner:
WARNING: (ehci): Message...
Unrecoverable USB hardware error.
There was an unrecoverable USB hardware error reported
by the ehci controller. Reboot the system. If this prob-
lem persists, contact your system vendor.
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Devices ehci(7D)
No SOF interrupts.
No SOF interrupts have been received. This USB EHCI con-
troller is unusable.
Error recovery failure: Please hotplug the 2.0 hub at .
The driver failed to clear 2.0 hub's T buffer. Remove
and reinsert the external USB2.0 hub.
Revision is not supported.
High speed USB devices prior to revision 0.95 are not
supported.
The following messages may be entered into the system log.
They are formatted in the following manner:
(ehci): Message...
Unable to take control from BIOS. Failure is ignored.
The driver was unable to take control of the EHCI
hardware from the system's BIOS. This failure is
ignored. To abort the attach on this take-over failure,
comment out a property in ehci.conf. (x86 only).
Unable to take control from BIOS.
The driver is unable to take control of the EHCI
hardware from the system's BIOS and aborts the
attach. High speed (USB 2.0) support is disabled. In
this case, all USB devices run at full/low speed. Con-
tact your system vendor or your system administror for
possible changes in BIOS settings. You can disable a
property in ehci.conf to ignore this failure. (x86
only.)
Low speed device is not supported.
Full speed device is not supported.
The driver detected a low or full speed device on its
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Devices ehci(7D)
root hub port. Per USB 2.0 specification, the device
should be routed to a companion host controller (OHCI or
UHCI). However, no attached companion host controller
appears to be available. Therefore, low and full speed
devices are not supported.
Low speed endpoint's poll interval of ms is below thres-
hold. Rounding up to 8 ms.
Low speed endpoints are limited to polling intervals
between 8 ms and 255 ms. If a device reports a polling
interval that is less than 8 ms, the driver uses 8 ms
instead.
Low speed endpoint's poll interval is greater than 255 ms.
The low speed device's polling interval is out of range.
The host controller does not allocate bandwidth for this
device. This device is not usable.
Full speed endpoint's poll interval must be between 1 and
255 ms.
The full speed device's polling interval is out of
range. The host controller does not allocate bandwidth
for this device. This device is not usable.
High speed endpoint's poll interval must be between 1 and 16
units.
The high speed device's polling interval is out of
range. The host controller will not allocate bandwidth
for this device. This device will not be usable. Refer
to the USB specification, revision 2.0 for the unit
definition.
ehcimodifyqhstatusbit: Failed to halt qh=.
Error recovery failed. Please disconnect and reinsert
all devices or reboot.
Note -
Due to recently discovered incompatibilities with this USB
controller, USB2.x transfer support has been disabled.
However, this device continues to function as a USB1.x
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Devices ehci(7D)
controller. Information on enabling USB2.x support is pro-
vided in this 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.
VIA chips may not be compatible with this driver. To bind
ehci specifically to the chip and eliminate the warnings,
and to enable USB2.x suppport, a new, more specific driver
alias (refer to adddrv(1M) and updatedrv(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 example:
# 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 follow-
ing step to add this alias, then reboot the system:
# updatedrv -a -i '"pci1106,3104"' ehci
# reboot
After you apply the above workaround, the following message
is displayed in your system log:
Applying VIA workarounds.
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