On Friday 17 December 2004 7:49 am, li xinyi wrote: > I can understand DMA buffer initlisation for EDs and TDs. But, in my > case I am working for OHCI connecting to ARM AHB bus with a seperate > general purpose DMA controller connecting to AHB as well.
You'll be ignoring that completely, unless you've got some SOC setup that claims to implement OHCI but which actually doesn't do so. OHCI has its own bus mastering DMA controller. > In the ohci > pci code, I can only see the code to initlise the DMA buffer, but dont > know how to actually enable/perform DMA. So I have no idea how to > modify the code to make it work for my board. Can any one provide help > on this. See how the 2.6 "ohci-hcd" driver handles this ... there are several ARM based SOCs with OHCI support there. You're working with old (2.4) code, so you'll have to kluge things not unlike how the 2.4 SA-1100 code did. - Dave ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
