From: Wolfgang Denk <wd@denx.de>
To: Domen Puncer <domen.puncer@telargo.com>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: pata_mpc52xx - no interrupts when using bestcomm/dma?
Date: Mon, 27 Aug 2007 21:10:16 +0200 [thread overview]
Message-ID: <20070827191017.0856024044@gemini.denx.de> (raw)
In-Reply-To: Your message of "Mon, 27 Aug 2007 11:44:54 +0200." <20070827094454.GQ13994@moe.telargo.com>
In message <20070827094454.GQ13994@moe.telargo.com> you wrote:
>
> The problem is that I can't seem to get any interrupts
> (not ata, not bestcomm task), when setting up MWDMA/UDMA mode.
First, please check the errata. There are some issues in this area -
one involves the ATA controller not handling automatic pause for DMA
transfers (controller will corrupt FIFO data when there is any sig-
nificant transfer load - system freezes, kernel crashes); another one
is erratum 158: "ATA interrupt is not affected by FIFO errors."
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Conscious is when you are aware of something, and conscience is when
you wish you weren't.
next prev parent reply other threads:[~2007-08-27 19:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-27 9:44 pata_mpc52xx - no interrupts when using bestcomm/dma? Domen Puncer
2007-08-27 19:10 ` Wolfgang Denk [this message]
2007-10-03 11:25 ` Matt Sealey
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