Re: Using preallocate pci, isa or nothing?

[Takashi Iwai <tiwai@suse.de>]

At Sun, 8 Feb 2004 18:29:10 -0600,
Mathieu Rondonneau wrote:
> 
> Hi,
> I'm sorry for the html format, these are some questions according to my
> problems.
> 
> I'm writing an ALSA driver for a CSB337 board (AT91RM9200). There is no PCI
> or ISA on this board. Should I preallocate memory with:
> snd_pcm_lib_preallocate_pages_for_all,
> snd_pcm_lib_preallocate_isa_pages_for_all() or
> snd_pcm_lib_preallocate_pci_pages_for_all()?
> 
> There is a specific DMA (PDC) on the AT91RM9200, so i'm trying to use
> snd_pcm_lib_preallocate_pages_for_all() but seems complicated to understand
> what is needed by the ALSA pcm and what i have to write.
> What does the function snd_..._pointer() mean? should i need it if i don't
> use ISA or PCI mecanism?
> What does the function snd_pcm_period_elapsed() mean? Should i need it if i
> don't use ISA or PCI mecanism?

did you take a look at my document?

	http://www.alsa-project.org/~iwai/writing-an-alsa-driver/


Takashi


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