From: Frank Bennett <bennett78@lpbroadband.net>
To: arieswar24b@yahoo.de
Cc: linuxppc-dev@ozlabs.org
Subject: Re: Bestcomm tasks and interrupts on MPC5200(B)
Date: Tue, 20 Jan 2009 08:51:53 -0700 [thread overview]
Message-ID: <4975F319.3010108@lpbroadband.net> (raw)
In-Reply-To: <381238.78267.qm@web25801.mail.ukl.yahoo.com>
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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@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
>
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next prev parent reply other threads:[~2009-01-20 15:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-20 13:15 Bestcomm tasks and interrupts on MPC5200(B) Dave Best
2009-01-20 15:51 ` Frank Bennett [this message]
2009-01-20 15:59 ` Frank Bennett
2009-01-20 16:04 ` Grant Likely
2009-01-21 12:57 ` Dave Best
2009-01-21 15:16 ` Jon Smirl
2009-01-21 15:26 ` Wolfram Sang
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