Using preallocate pci, isa or nothing?

["Mathieu Rondonneau" <mathieu.rondonneau@polymtl.ca>]

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?

Thanks
any help would be very appreciate.

Mathieu Rondonneau



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