An initial Linux driver for the WM8903 audio CODEC has been released. The driver can be obtained via our ASoC repository.

Linux 2.6.26 integrates a large number of changes to the ASoC subsystem, including:

• Support for TI OMAP processors from 1510 to 2040.
• Support for TI DaVinci processors.
• Support for the AC97 controller on PXA 3xx processors.

along with numerous updates to codec drivers, improvements to diagnostic output and updates to reflect current kernel coding standards.

I've now released the first version (v0.1) of the ALSA scenario (or use case) manager. It's currently a stand alone library and can either be linked against alsa-lib or salsa. This library is designed to provide userspace applications (e.g. Pulse Audio) with a generic API to change the audio hardware scenario or use case.

Features :-

• Scenario get() and set()
• Mixer alias (i.e. what is the correct volume control for scenario x)
• Scenario dump

A Linux driver supporting the core functionality of the WM8580 audio CODEC has been released in the ASoC repository.

Linux version 2.6.25 integrates a number of updates to the ALSA System on Chip subsystem. Among the changes integrated are:

• Support for the Freescale MPC8610 SoC
• Support for IIS on the Samsung S3C2412 SoC
• Support for TLV controls, allowing the use of dB scales by applications

Linux support for the AC97 controller provided by the Marvel PXA3xx SoC processors has now been added to version 1 of the ASoC drivers and also to the non-ASoC PXA AC97 driver. Updated versions of these drivers are available from the dev branch ASoC git tree and the changes are intended for merge into Linux 2.6.26.

An ASoC-based Linux driver for the WM8900 CODEC with Class G Headphone Driver is now available from the ALSA System on a Chip repository. Features supported by this driver include:

• Full analogue and digital path support
• DAPM integration for minimal power consumption
• Automatic FLL configuration from the full range of supported input frequencies

Version 2 of the ALSA SoC subsystem overhauls the subsystem to add greater flexibility, clean up the APIs and bring it more closely into line with the driver model. It is currently entering the final phase of development and testing with the core APIs now stable and the focus on porting kernel versions. It is hoped that this code will be merged into the standard Linux kernel by version 2.6.27.

Features implemented in version 2 include: