[alsa-devel] [PATCH 3/3] Add ALSA driver for Atmel AC97 controller

Hans-Christian Egtvedt hans-christian.egtvedt at atmel.com
Wed Feb 4 14:03:08 CET 2009

On Wed, 04 Feb 2009 13:51:48 +0100
Sedji Gaouaou <sedji.gaouaou at atmel.com> wrote:

> Hi,
> Hans-Christian Egtvedt a écrit :
> > Yes, it should be possible to share the AC97C driver between AT91
> > and AVR32. Although this AC97C driver uses the DesignWare DMAC
> > controller (drivers/dma/dw_dmac.c).
> > 
> > I do not remember which DMA interface AT91 devices uses.
> > 
> > Should the driver go into sound/drivers then? And renamed to
> > atmel-ac97c.{c,h} for example.
> > 
> Actually there are some differences, AT91 does not use a DMA, we use
> a specific IP(PDC) to transer the data...

PDC is still DMA ;) I guess AT91 uses the "old" PDC and not PDCA?

> Maybe we could share the same code we some #define in it?

Yes, it should be simple to add an additional #define in kconfig.

	depends on ARCH_AT91

And then have some ifdefs/else around the DMA stuff, much like the
atmel-mci driver does today.

Best regards,
Hans-Christian Egtvedt

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