I'm developing an Aztech PCI168 (AZF3328) driver

I'm developing an Aztech PCI168 (AZF3328) driver

[Andreas Mohr]

Hi all,

I'm currently in the process of developing a driver for this soundcard
(that's one of about 6 unsupported cards in the support matrix).
Needless to say, Aztech doesn't give ANY SUPPORT for its sound cards
(and yes, I did have my fair share of email autoreplies and negative replies).
I'm the guy mentioned in the ALSA support matrix, BTW, just in case
you wondered :)

The purpose of this mail is to find out whether there's *someone* out there
who has the same (or a similar !) card and wants to join development.
I've got the PCI168 AP(W) version (subsystem ID 1801), other versions are:
- PCI168 A(W), sub ID 1800
- PCI168 A/AP, sub ID 8000
- others ??

Current status:
- mixer interface can be accessed and works, not fully implemented yet
  (CD playback / master volume muting can be managed and *work*)
- started trying to get DMA playback (and interrupt management) to work,
  but so far no annoying noise yet :-)

Also, I'd really like to talk to someone who is pretty intimate with
the operation of several sound card drivers.

Have fun,

Andreas Mohr

-- 
Microsoft Licensing 6.0: "Pay us now in advance, so that we can own you later."


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Re: I'm developing an Aztech PCI168 (AZF3328) driver

[Takashi Iwai]

Hi Andreas,

At Sun, 8 Sep 2002 11:16:59 +0200,
Andreas Mohr wrote:
> 
> Hi all,
> 
> I'm currently in the process of developing a driver for this soundcard
> (that's one of about 6 unsupported cards in the support matrix).
> Needless to say, Aztech doesn't give ANY SUPPORT for its sound cards
> (and yes, I did have my fair share of email autoreplies and negative replies).
> I'm the guy mentioned in the ALSA support matrix, BTW, just in case
> you wondered :)
> 
> The purpose of this mail is to find out whether there's *someone* out there
> who has the same (or a similar !) card and wants to join development.
> I've got the PCI168 AP(W) version (subsystem ID 1801), other versions are:
> - PCI168 A(W), sub ID 1800
> - PCI168 A/AP, sub ID 8000
> - others ??
> 
> Current status:
> - mixer interface can be accessed and works, not fully implemented yet
>   (CD playback / master volume muting can be managed and *work*)
> - started trying to get DMA playback (and interrupt management) to work,
>   but so far no annoying noise yet :-)
> 
> Also, I'd really like to talk to someone who is pretty intimate with
> the operation of several sound card drivers.

great!  please send us the patch if you finish the code.
we can merge it into alsa-driver cvs tree (not alsa-kernel at first)
for review and tests.


ciao,

Takashi


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Re: I'm developing an Aztech PCI168 (AZF3328) driver

[Takashi Iwai]

Hi Andreas,

At Mon, 9 Sep 2002 11:41:02 +0200,
Andreas Mohr wrote:
> 
> Hi Takashi !
> 
> On Mon, Sep 09, 2002 at 11:05:15AM +0200, Takashi Iwai wrote:
> > Hi Andreas,
> > 
> > At Sun, 8 Sep 2002 11:16:59 +0200,
> > Andreas Mohr wrote:
> > > 
> > > Hi all,
> > > 
> > > I'm currently in the process of developing a driver for this soundcard
> > > (that's one of about 6 unsupported cards in the support matrix).
> 
> [...]
> 
> > > Also, I'd really like to talk to someone who is pretty intimate with
> > > the operation of several sound card drivers.
> > 
> > great!  please send us the patch if you finish the code.
> > we can merge it into alsa-driver cvs tree (not alsa-kernel at first)
> > for review and tests.
> Thanks !
> 
> I just discovered that Aztech claims AC97 codec compatibility:
> "   AZF3328 is a single low cost PCI audio sound chip that has built-in
>    AC'97 CODEC, game port, MPU401 and a I2S serial bus for external DAC.  "
> 
> However, the mixer register set I found varies a lot from the AC97 layout:
> ******** io base addr of esi+d ("mixer_port") ********
> +00h: in.
> 
(snip) 

> +00h doesn't seem to be the config register the AC97 spec claims it should be
> (simply returns 00h when queried),
> and many other register offsets are 2 bytes off (PC Beep 08h instead of 0ah,
> ModemIn/Phone Volume 0ah of 0ch, Mic Volume 0ch instead of 0eh, ...)
 
yes.  perhaps modem-in corresponds to the mono on ac97.
the range from 0x02 to 0x18 on ac97 corresponds to 0x00 - 0x16 on
aztech, but others are apparently not.

> Are you able to enlighten me on these differences ?
> Any hints you can give me about achieving AC97 programming here ?

i guess it's NOT really compatible with ac97.  or is there any
reigster to change the behavior?
anyway, we don't have to stick with ac97 in this case.  the mixer
controls can be built in the driver.


ciao,

Takashi


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