ehci(7D) Devices ehci(7D)NAMEehci - 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.
A USB 2.0 host controller includes one high-speed host controller 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 communications 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 companion USB 1.1 host con‐
trollers. (OHCI or UHCI host controller).
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 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
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬──────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼──────────────────────────────┤
│Architecture │SPARC, x86, PCI-based systems │
├─────────────────────────────┼──────────────────────────────┤
│Availability │SUNWusb │
└─────────────────────────────┴──────────────────────────────┘
SEE ALSOadd_drv(1M), prtconf(1M), rem_drv(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.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: <device path> (ehci<instance number>): Message...
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.
Error recovery failure: Please hotplug the 2.0 hub at <device path>.
The driver failed to clear 2.0 hub's TT buffer. Remove and reinsert
the external USB2.0 hub.
Revision<xx> 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:
<device path> (ehci<instance number>): 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. Contact 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 root hub
port. Per USB 2.0 specification, the device should be routed to a
companion host controller (OHCI or UHCI). However, no attached com‐
panion host controller appears to be available. Therefore, low and
full speed devices are not supported.
Low speed endpoint's poll interval of <n> ms is below threshold. Round‐
ing 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.
ehci_modify_qh_status_bit: Failed to halt qh=<address>.
Error recovery failed. Please disconnect and reinsert all devices
or reboot.
Note - Due to recently discovered incompatibilities with this USB con‐
troller, USB2.x transfer support has been disabled. However,
this device continues to function as a USB1.x controller.
Information on enabling USB2.x support is provided 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 add_drv(1M) and update_drv(1M)) must be specified for
ehci. By default, the ehci alias is 'pciclass,0c0320.' The com‐
patible 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:
# update_drv -a -i '"pci1106,3104"' ehci
# reboot
After you apply the above workaround, the following message is dis‐
played in your system log:
Applying VIA workarounds.
SunOS 5.10 13 April 2006 ehci(7D)
