Jugalkishore Darak, Pankaj wrote:

We are porting Linux 2.6.25.4 to a platform which has ARM11 as its core processor. My job is to implement audio device driver.

Then you'd better ask on alsa-devel (CC'd).

Most of the docs are meant for PC audio which has sound cards on PCI. And the source code resides in sound folder under the kernel root.

Since mine is an embedded platform, where will my architecture specific code resides?

Any platform-specific code will be below your arch/ directory. The DMA controller and the codecs are likely to be used on other platforms too, so they'd go into sound/.

Which all folders under sound folder will be used for embedded devices

mostly soc/

and which APIs to look into?

linux/Documentation/sound/alsa/soc/*.txt http://alsa-project.org/main/index.php/ASoC http://opensource.wolfsonmicro.com/content/asoc-audio-embedded-linux-systems

HTH Clemens