ysun wrote: > Hi There, > I try to port 2.4.9 ohci driver to a mips platform. I have following > questions, could anyone kindly clear me? > 1. Every ED has a dummy TD. Will this dummy TD be processed by HC and put > into done queue? There is no data in the TD.
The dummy TD will be used for the first TD of the next URB for that same endpoint. (Read the OHCI spec). - Roman > 2. Sometime, I saw HC returns a TD with a CC field which is 0xf to HC > driver. Accroding to OHCI spec, 0xf means TD not accessed.If this TD did > not accessed by HC, how come this TD is put into done queue by HC > 3. Is that possible that HC driver get WDH interrupt but HccaDoneHead is 0? > 4. My mips board has no PCI bus and HC just can access first 4M address > space(my kmalloc can take care of this). Is here any > one already ported usb-ohci driver to such kind of platform? > Any information will be appreciated. > Sun > > > _______________________________________________ > [EMAIL PROTECTED] > To unsubscribe, use the last form field at: > https://lists.sourceforge.net/lists/listinfo/linux-usb-devel > > > _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
