Author Topic: Zaurus Ide-cs Dma Support (Read 3992 times)

realm · « **on:** July 20, 2007, 07:12:08 pm »

if i'm reading this reference document which says the pxa270 should support dma mode 0 1 at least.

http://www.xilinx.com/publications/xcellon...38_57-iwave.pdf

right now hdparm -tT /dev/hda lists 1.7 Mb/sec transfer rates. no dma or 32 bit io. everytime i tried to enable 32 bit io my z crashed. everytime i tried to enable dma (hdparm -d 1 /dev/hda) i got - HDIO_SET_DMA failed: Operation not permitted.

i'm going to keep googling about this, but has anyone out there got dma working on their z?

ernestus · « **Reply #1 on:** July 20, 2007, 08:30:02 pm »

Does the microdrive (or any other cf memory) support DMA transfers? I am not sure of that.

Cheers

pelrun · « **Reply #2 on:** July 20, 2007, 09:01:31 pm »

The CF interface is only 16-bit, so 32-bit transfers are out of the question. Additionally, the PXA270 dma lines arent connected to anything in the Z as far as I can tell (certainly not to the Scoop CF controllers) so DMA is unavailable too.

realm · « **Reply #3 on:** July 23, 2007, 02:12:43 pm »

the new 8 gig and 16 gig high end cf cards suport dma

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Author Topic: Zaurus Ide-cs Dma Support (Read 3992 times)