On Sunday 29 May 2005 6:03 am, Anil Yadav wrote: > I tried almost all possible combinations to frame urb. I checked with > kernels from 2.4.20 to 2.4.30.
I'd not recommend a 2.4 kernel for your application. Try the latest 2.6 code, possibly with the patch from: http://marc.theaimsgroup.com/?l=linux-usb-devel&m=111730249708028&w=2 Also, make sure your ISO code works with for example OHCI on 2.6; you may have problems in your ISO logic, apart from any potential EHCI issues. (Differences at high speed will include data rate, polling interval -- units in uframes, not frames -- and possibly per-period data size of up to 3 KB.) And the behavior for ISO changed in 2.6; a pointless "automagic resubmit" mechanism is gone. (Which was never implemented for EHCI in 2.4 fwiw ... the 2.6 approach works just fine on 2.4 though, with all HCDs.) > Is there any driver available in the kernel ( Isochronous) for high speed > device. > By the way my kernel version is 2.4.20-8. Definitely do NOT use EHCI in any version before 2.4.22 ... there are some 2.4 versions with ISO support that may work for high speed ISO, but I don't know which ones they'd be. Certainly 2.4.20 is strongly discouraged. As I said, 2.6.recent ... plus maybe the patch above. Once it's working on 2.6, the iso code may work on newish 2.4 kernels. - dave ------------------------------------------------------- This SF.Net email is sponsored by Yahoo. Introducing Yahoo! Search Developer Network - Create apps using Yahoo! Search APIs Find out how you can build Yahoo! directly into your own Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
