Li Yang-r58472 wrote: >> i have a MPC8347E running with the Freescale E(F)HCI driver >> and Kernel 2.6.17 (Freescale LTIB). >> >> Because of this mail, i checked, if there are any periodical >> interrupts, without real USB payload. >> >> The result is: NO >> >> If i attach a USB-mouse, i get 5 interrupts. >> If i remove it again, 1 additional. >> >> Nothing else, silence ! >> >> USB works well with USB 1.1 and 2.0 devices (This was not the >> case with earlier Kernels, e.g. 2.6.13, because for the >> switching between 1.1 and 2.0 you need a transaction >> translator driver). > > MPC834x USB is very different from the USB of CPM/QE. It is an > integrated EHCI controller. >
So, the question is still open, does the QuiccEngine HCI (a.k.a. FHCI) generate loading on the PPC core when there is no traffic on the USB? Alex
