usb_as(7D)

NAME | SYNOPSIS | DESCRIPTION | FILES | ATTRIBUTES | SEE ALSO | DIAGNOSTICS | NOTES

NAME

usb_as– USB audio streaming driver

SYNOPSIS

sound@unit-address

DESCRIPTION

The usb_as driver is a USBA (Solaris USB Architecture) compliant client driver that supports the USB Audio Class 1.0 specification.

The usb_as driver processes audio data messages during play and record and sets sample frequency, precision, encoding and other functions on request from the USB audio control driver. See usb_ac(7D).

This driver is plumbed under the USB audio control driver and does not directly interface with the user application.

FILES

/kernel/drv/usb_as

32 bit ELF kernel module for original USBA framework.*

/kernel/drv/sparcv9/usb_as

64 bit ELF kernel module for original USBA framework.* (SPARC only).

/kernel/drv/usba10_usb_as

32 bit ELF kernel module for USBA 1.0 framework.*

/kernel/drv/sparcv9/usba10_usb_as

64 bit ELF kernel module for USBA 1.0 framework.* (SPARC only).

/kernel/drv/usba10_usb_as.conf

usba10_usb_as configuration file

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

ATTRIBUTES

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

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Architecture	PCI-based systems
Availability	SUNWusb (All architectures) SUNWusbx (SPARC only)
Stability level	Evolving

SEE ALSO

mixerctl(1), attributes(5), usba(7D), usb_ac(7D), audio(7I), mixer(7I), streamio(7I)

Writing Device Drivers

Universal Serial Bus Specification 2.0

System Administration Guide: Basic Administration

http://www.sun.com/desktop/whitepapers.html

http://www.sun.com/io

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> usb_as<instance num>: Error Message...

or

Warning: <device path> usba10_usb_as<instance num>: Error Message...

where <device path> is the physical path to the device in /devices directory.

No bandwidth available.

There is no bandwidth available for the isochronous pipe. As a result, no data will be transferred during play and record.

Cannot access device. Please reconnect <name>.

There was an error in accessing the device during reconnect. Please reconnect the device.

Device is not identical to the previous one on this port. Please disconnect and reconnect.

A USB audio streaming interface was hot-removed while open. A new device was hot-inserted which is not identical to the original USB audio device. Please disconnect the new USB device and reconnect the original device to the same port.

NOTES

The USB audio streaming interface will be power managed if device is idle.

SunOS 5.9  Last Revised 6 May 2004

NAME | SYNOPSIS | DESCRIPTION | FILES | ATTRIBUTES | SEE ALSO | DIAGNOSTICS | NOTES