ref: pxa255 Alsa driver

ref: pxa255 Alsa driver

[Paul Wang]

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Hi, all,

 

I am new to Linux sound drivers.

 

What I am looking for is a pxa255 based sound driver based on pxa255
I2Sound.

 

Does any Alsa driver implement this?

 

Regards.

 

Paul Wang.


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ref: pxa255 Alsa Driver

[Paul Wang]

Hi, all,

I am new to Linux sound drivers.
What I am looking for is a pxa255 sound driver based on pxa255 I2Sound.
Does any Alsa driver implement this on kernel 2.6?

Regards.

Paul Wang.


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Re: ref: pxa255 Alsa Driver

[Paul Wang]

Hi, Liam,

I have further questions about this:

How can I merge the driver you mentioned into Arm Linux source
Architecture?

To use it, do I have to use the application on the alsa-kernel HG
repository?

regards.

Paul Wang


-----Original Message-----
From: Liam Girdwood [mailto:liam.girdwood@wolfsonmicro.com] 
Sent: Thursday, 16 November 2006 1:23 a.m.
To: Paul Wang
Cc: alsa-devel
Subject: Re: [Alsa-devel] ref: pxa255 Alsa Driver

Hi Paul,

On Wed, 2006-11-15 at 14:48 +1300, Paul Wang wrote:
> Hi, all,
> 
> I am new to Linux sound drivers.
> What I am looking for is a pxa255 sound driver based on pxa255
I2Sound.
> Does any Alsa driver implement this on kernel 2.6?
> 

There is an I2S driver for the pxa255 in the alsa-kernel HG repository. 

http://hg-mirror.alsa-project.org/alsa-kernel

Alternatively, the driver can also be found in this patch :-

http://opensource.wolfsonmicro.com/~lg/asoc/asoc-v0.12.3.patch

This patch also includes more supported codecs than the HG repo atm.

HTH

Liam


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Re: ref: pxa255 Alsa Driver

[Liam Girdwood]

On Thu, 2006-11-16 at 11:32 +1300, Paul Wang wrote:
> Hi, Liam,
> 
> I have further questions about this:
> 
> How can I merge the driver you mentioned into Arm Linux source
> Architecture?
> 

The ASoC patch can be merged into your recent 2.6 kernel source with the
patch command.

i.e.

cd linux
patch -p1 < asoc.patch 

> To use it, do I have to use the application on the alsa-kernel HG
> repository?

The HG repository can be checked out using the instructions (link below)
on the download page and can be copied to your kernel sound directory.

http://www.alsa-project.org/download.php

The core code is the same in the patch and the HG repository. The only
difference between them is that the patch has some extra codec drivers
atm (that will be merged into the HG repo in the future).

You will however need to write a small machine driver that will glue the
codec driver to the pxa2xx i2s and audio DMA code (e.g. corgi.c,
poodle.c) and may have to write a codec driver if your codec is
currently unsupported.

The driver can be used by using any audio application that supports
alsa. 

Liam



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