On Apr 11, 2006, at 5:30 AM, Stefan Meyer wrote: > Hi All > Pardon the intrusion if this is not the correct way to get the > relevant information, but I am relatively new to kernel hacking. > Anyway here goes my question: > I am getting a Freescale MPC8343 based board up and running and > have been using the BSP (with patched 2.6.11 kernel) release by > Freescale with great success. > However when I tried to use the USB ISO transactions it seems to be > non functional. I have connected a known good working codec (tested > on my PC's usb) and tried to access it via the low level sound > driver (/dev/dsp) but it only creates garbled noise. > In the meanwhile, I have noticed that the official kernel release > 2.6.17 also start supporting the MPC834X platform and would rather > like to persue that avenue to get my problems addressed (hopefully). > I have downloaded the latest 2.6.17 kernel and got it going with > the configuration for MPC834x_sys, with relation to booting and > ethernet comms. > However there are clearly no provision in the USB driver for > setting up the usb clocks and ports (which is of course MPC834x > specific). > I have tried to hack it by inserting approriate code form the > 2.6.11 freescale kernel but with very little success. > On inspection of the 2.6.11 kernel from Freescale I have also > noticed that the USB core drivers were heavily modified around DMA > buffer management, although the 2.6.17 had no such hacks in place. > My question simply relates to the status of the MPC834x > implementation on the 2.6.17 kernel in so far that it is > operational and being tested on hardware platforms. Could you > please direct me to the persons(s) who have experience with this > platform ?
The USB support for MPC834x only exists if you build it for ARCH=powerpc. There is a patch on the list archives for adding support to ARCH=ppc. I don't know if there is any issue with ISO transactions in those version, but they been shown to work with USB ethernet and USB HD devices. - kumar
