The ehci driver is a USBA (Solaris USB Architecture) compliant nexus driver that supports the Enhanced Host Controller Interface Specification 1.0, an industry standard developed by Intel.

The ehci driver supports control, bulk and interrupt transfers. It enables support for USB 2.0 devices in the USBA 1.0 framework

/kernel/drv/usba10_ehci

32-bit ELF kernel module for the USBA 1.0 framework*

/kernel/drv/sparcv9/usba10_ehci

64-bit ELF kernel module for the USBA 1.0 framework*

* Please see www.sun.com/desktop/whitepapers.html for more information regarding USB dual framework implementation, USBA 1.0, and USB 2.0.

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

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Architecture	PCI-based SPARC systems
Availability	SUNWusb, SUNWusbx

attributes(5), hubd(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/desktop/whitepapers.html

http://www.sun.com/io

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> (usba10_ehci<instance number>): 
Error message...

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

High speed isochronous transfers 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.

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