Hi Clemens, Thanks for the code, the processor I am using is MPC8541E which I believe have the same DMA engine as mpc8540. I will try it and will let you know how it worked.
Thanks, Bizhan -----Original Message----- From: Clemens Koller [mailto:[EMAIL PROTECTED] Sent: Thursday, August 04, 2005 5:13 AM To: Bizhan Gholikhamseh (bgholikh) Cc: linuxppc-embedded at ozlabs.org Subject: Re: MPC8541E DMA transfer Hello, Bizhan! and all the other mpc85xx DMA fans. I am working on the mpc85xx dma stuff (based on Jason's work) on the lastest 2.6.x kernels. My cpu is a mpc8540. That's all work in progress, so have a look at the code. Attached you will find some of my test code (a separate kernal module) which should compile fine for 2.6 now. Make a symlink ~/linux to the latest 2.6 kernel or change the makefile. There is also the latest immap_85xx.h (almost complete) included. Some old code is commented out... Not all code is enabled in the module yet, and the dma_test routine copys data from physical memory you might not have in your hardware. Please change that according to your setup. Feedback is welcome! Enjoy! Clemens Koller _______________________________ R&D Imaging Devices Anagramm GmbH Rupert-Mayer-Str. 45/1 81379 Muenchen Germany http://www.anagramm.de Phone: +49-89-741518-50 Fax: +49-89-741518-19 Bizhan Gholikhamseh (bgholikh) wrote: > Is there any support in Linux 2.6.X for using this controller, if so, > are you aware of any test driver I can take a look at? > > Thanks, > Bizhan > > Many thanks in > > -----Original Message----- > From: Kumar Gala [mailto:kumar.gala at freescale.com] > Sent: Wednesday, August 03, 2005 11:24 AM > To: Bizhan Gholikhamseh (bgholikh) > Cc: linuxppc-embedded at ozlabs.org > Subject: Re: MPC8541E DMA transfer > > I dont see any reason you couldn't use the internal DMA engine on the > MPC8541E to do what you need. You will just need to schedule the work > every 10ms. > > - kumar > > On Aug 3, 2005, at 10:04 AM, Bizhan Gholikhamseh \(((bgholikh\))) wrote: > > >>Hi all, >>I am developing a linux driver (2.6.10) for Freescale MPC8541E >>(customized board) to read and write 8 buffers (each buffer is 960 >>bytes >>long) every 10 ms to/from a custom made PCI card with on board DSP >>Chip. >>The chip's internal and external memories are memory mapped to the CPU > > >>address space. >>For reason that is beyond the discussion here, the DMA request line on > > >>the PCI card is not connected although the PCI card has DMA >>capabilities. >>So what are my options? >>Could I still do DMA transfer from the Host to the device? >> >>Many thanks in advance, >>Bizhan >> >><ATT293768.txt> >> > _______________________________________________ > Linuxppc-embedded mailing list > Linuxppc-embedded at ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-embedded >
