C-Media 8x38 driver for kernel 2.4

C-Media 8x38 driver for kernel 2.4

[Paolo Rossi]

Hi,

During this weekend I've tested my patched driver on the following
kernel versions:
2.3.99pre6
2.4.0-test1
2.4.0-test1-ac7

It seems to work fine (module and resident). This driver is a patched
version of 3.21 released by C-Media on May 23, 2000. I've also included 
the experimental S/PDIF in/out support by Jan Niehusman.
Download the driver (+Config.in +patch-against-2.4.0-test1 +ver_linux)
at http://web.tiscalinet.it/luvassu/cmpci/cmpci-20000604.tar.gz.

Bye.

-lupo

Re: C-Media 8x38 driver for kernel 2.4

[Chen-Li Tien]

Dear Paolo,

I also made a version that support kernel 2.2 and 2.4 (thanks for your
work), and fixes since the version 3.21. I read that you add S/PDIF in/out
in the init-module. May I remind you that they are not supported with all
format, so if you only use 44k/48k then it is ok. User would need to unload
and load the driver to use S/PDIF in/out and use another wave format. I
don't suggest add it as general driver come with kernel. It is also explain
in the cmpci file.

The version 4.02 driver can be got at
http://members.home.net/puresoft/cmedia.html.

Sincerely,
Charles Tien

Paolo Rossi wrote:

> Hi,
>
> During this weekend I've tested my patched driver on the following
> kernel versions:
> 2.3.99pre6
> 2.4.0-test1
> 2.4.0-test1-ac7
>
> It seems to work fine (module and resident). This driver is a patched
> version of 3.21 released by C-Media on May 23, 2000. I've also included
> the experimental S/PDIF in/out support by Jan Niehusman.
> Download the driver (+Config.in +patch-against-2.4.0-test1 +ver_linux)
> at http://web.tiscalinet.it/luvassu/cmpci/cmpci-20000604.tar.gz.
>
> Bye.
>
> -lupo

Re: C-Media 8x38 driver for kernel 2.4

[Paolo Rossi]

Hi Chen-Li,
> 
> I also made a version that support kernel 2.2 and 2.4 (thanks for your
> work), and fixes since the version 3.21. I read that you add S/PDIF in/out
> in the init-module. May I remind you that they are not supported with all
> format, so if you only use 44k/48k then it is ok. User would need to unload
> and load the driver to use S/PDIF in/out and use another wave format. I
> don't suggest add it as general driver come with kernel. It is also explain
> in the cmpci file.

...I know that there are some problems with S/PDIF, in fact this is an
EXPERIMENTAL feature. I've included it in the driver because I think
that people may have interest on working on it.

> 
> The version 4.02 driver can be got at
> http://members.home.net/puresoft/cmedia.html.
> 
...yeah! I reported it on my site (http://web.tiscalinet.it/luvassu)

Bye.

-lupo

Re: C-Media 8x38 driver for kernel 2.4

[Jan Niehusmann]

On Mon, Jun 05, 2000 at 04:21:33AM -0400, Chen-Li Tien wrote:
> I also made a version that support kernel 2.2 and 2.4 (thanks for your
> work), and fixes since the version 3.21. I read that you add S/PDIF in/out
> in the init-module. May I remind you that they are not supported with all
> format, so if you only use 44k/48k then it is ok.

Is there any documentation about that topic available? I only found some 
register descriptions, and used them (with some trial and error) to 
enable s/pdif in and out. It's clearly an experimental feature.
It should not be a big problem to enable s/pdif only if compatible parameters
are used, with documentation available. 

But I do have problems with lost or modified data - for testing purposes
I connected s/pdif out back to in, and piped a textfile through it (turn
your stereo off before you try this ;-) )

Some months ago I did an interesting observation: Corruptions were worse on
an idle system! As soon as I started to play music on a second sound card, 
I saw nearly no lost bytes any more. 

I'd really like to hear if other people have similar problems. Perhaps I just
got a bad sound card?

Jan

Re: C-Media 8x38 driver for kernel 2.4

[Chen-Li Tien]

Paolo Rossi wrote:

> Hi Chen-Li,
> >
> > I also made a version that support kernel 2.2 and 2.4 (thanks for your
> > work), and fixes since the version 3.21. I read that you add S/PDIF in/out
> > in the init-module. May I remind you that they are not supported with all
> > format, so if you only use 44k/48k then it is ok. User would need to unload
> > and load the driver to use S/PDIF in/out and use another wave format. I
> > don't suggest add it as general driver come with kernel. It is also explain
> > in the cmpci file.
>
> ...I know that there are some problems with S/PDIF, in fact this is an
> EXPERIMENTAL feature. I've included it in the driver because I think
> that people may have interest on working on it.
>

How about adding some comments in Configure.help as I do? I hope there is not too
many
technical support for this flood into C-Media's web site...;-) I know many cards
have S/PDIF
function and have also this format limit.

Please make sure merge my code because it fix a serious bug that cause the DMA
stop when heavy
network traffic. For example, playback a mp3 with xmms and ftp a large file
(100MB) in the LAN.

Did you get 8738B? They told me it is test version and not in mass production.

>
> >
> > The version 4.02 driver can be got at
> > http://members.home.net/puresoft/cmedia.html.
> >
> ...yeah! I reported it on my site (http://web.tiscalinet.it/luvassu)
>
> Bye.
>
> -lupo