Bestcomm tasks and interrupts on MPC5200(B)

[Frank Bennett]

Dave Best wrote:
> I'm trying to write a driver which uses the Local Plus Bus on my MPC5200B and therefore have to use BestComm DMA, which requires me to use a Gen_BD task for data transfer with Local Plus.
> I tried to follow the fec driver that is currently used and took a peek at the mpc52xx-ac97 driver which at least uses the same kind of bus as I.
>   
Find attached a Bestcomm instruction set summary sheet from the 
Freescale folks.
Hope this helps.

-Frank
> Initialising the task, resetting and enabling works fine. Even request_irq reports no error, but when I start a transfer it hangs and if I am lucky, an interrupt occurs after quite some time. But it's always the BestComm ethernet rx task which produces an RFIFO interrupt, presumably after the watchdog catches on. 
> If this happens my interrupt occurs to.
>
> I tried to debug this situation but I am still clueless.
> If I use the MPC5200 Interrupt emulation registers to force an interrupt for my interface to occur, nothing happens except that it hangs.
>
> Any hints, tips or help appreciated.
>
> Dave
>      
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev at ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>   


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20090120/e58d8011/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: sdHandAssemblyLcdDrd.pdf
Type: application/pdf
Size: 9984 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20090120/e58d8011/attachment.pdf>