[alsa-devel] WRITING AN SOC DRIVER WITHOUT DMA

[Nobin Mathew]

Hi Dinesh,

If that is your requirement then go and see the actual code
sound/arm/aaci.c. They are not using DMA. It is programmed IO.


Thanks
Nobin Mathew

On 7/17/08, Mark Brown <broonie at opensource.wolfsonmicro.com> wrote:
>
> On Thu, Jul 17, 2008 at 11:33:31AM +0530, dinesh wrote:
>
> > What i want is that i have a buffer in driver code which is also handled
> > by some other application i want that this buffer data is to be used for
> > capture and playback  stream fills data to another buffer which i can
> > passover to my other application.
>
> Depending on what exactly you're doing here you may find that this is
> best implemented in user space with an ALSA plugin rather than doing it
> as part of a driver.  If you do want to do this in kernel space then the
> parts of an ASoC driver which transfer audio data are just the same as
> those for any other ALSA driver so things like sound/arm/aaci.c may
> provide useful examples.
>