Re: [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 [EMAIL PROTECTED] 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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Re: [alsa-devel] WRITING AN SOC DRIVER WITHOUT DMA

[Nobin Mathew]

Hi dinesh,

If you are working on ARM, see the ARM AACi code, in sound/arm/aaci.c

Thanks
Nobin Mathew.


On 7/16/08, dinesh [EMAIL PROTECTED] wrote:

 Hi,
 I am writing a soc sound driver for MPC8323 board linux 2.6.24 in which i
 want to do data transfer to and from device myself using BUFFER DESCRIPTOR
 not with the usual DMA transfer.
 Please help me.
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