All 85xx processors to date have the same 4 channel DMA engine. - kumar
On Aug 4, 2005, at 11:52 AM, Bizhan Gholikhamseh \(((bgholikh\))) wrote: > 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:clemens.koller at anagramm.de] > 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 >> >> > _______________________________________________ > Linuxppc-embedded mailing list > Linuxppc-embedded at ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-embedded >
