From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Mathieu Rondonneau" Subject: using preallocate pci, isa or nothing? Date: Fri, 6 Feb 2004 20:45:33 -0600 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <006d01c3ed24$75653b40$c4f9cb18@win2K> Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_006A_01C3ECF2.2A709D50" Return-path: Errors-To: alsa-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: alsa-devel@lists.sourceforge.net List-Id: alsa-devel@alsa-project.org This is a multi-part message in MIME format. ------=_NextPart_000_006A_01C3ECF2.2A709D50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi all, 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 ------=_NextPart_000_006A_01C3ECF2.2A709D50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi all,

I'm writing an ALSA driver for a = CSB337 board=20 (AT91RM9200). There is no PCI or ISA on this board. Should I preallocate = memory=20 with: snd_pcm_lib_preallocate_pages_for_all,=20 snd_pcm_lib_preallocate_isa_pages_for_all() or=20 snd_pcm_lib_preallocate_pci_pages_for_all()?

There is a specific DMA (PDC) on the = AT91RM9200, so=20 i'm trying to use snd_pcm_lib_preallocate_pages_for_all() but seems = complicated=20 to understand what is needed by the ALSA pcm and what i have to=20 write.

What does the function = snd_..._pointer() mean?=20 should i need it if i don't use ISA or PCI mecanism?

What does the function = snd_pcm_period_elapsed()=20 mean? Should i need it if i don't use ISA or PCI mecanism?

Thanks

any help would be very = appreciate.

Mathieu=20 Rondonneau

------=_NextPart_000_006A_01C3ECF2.2A709D50-- ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn