On 7/17/08, Nobin Mathew nobin.mathew@gmail.com wrote:
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.
Search around the list archives, the first version of the Efika/mpc5200 ac97 driver was programmed IO. The next version updated it to DMA.
Thanks Nobin Mathew
On 7/17/08, Mark Brown broonie@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.
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