From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Mathieu Rondonneau" Subject: Using preallocate pci, isa or nothing? Date: Sun, 8 Feb 2004 18:29:10 -0600 Sender: alsa-devel-admin@lists.sourceforge.net Message-ID: <009601c3eea3$bca696e0$c4f9cb18@win2K> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit 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 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 ------------------------------------------------------- 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