From: David Miller <davem@davemloft.net>
To: avorontsov@mvista.com
Cc: linuxppc-dev@ozlabs.org, afleming@freescale.com,
Sandeep.Kumar@freescale.com, manfred.rudigier@omicron.at,
netdev@vger.kernel.org
Subject: Re: [PATCH v2 3/3] gianfar: Implement workaround for eTSEC-A002 erratum
Date: Wed, 30 Jun 2010 11:37:27 -0700 (PDT) [thread overview]
Message-ID: <20100630.113727.257507106.davem@davemloft.net> (raw)
In-Reply-To: <20100630163915.GC23337@oksana.dev.rtsoft.ru>
From: Anton Vorontsov <avorontsov@mvista.com>
Date: Wed, 30 Jun 2010 20:39:15 +0400
> MPC8313ECE says:
>
> "If the controller receives a 1- or 2-byte frame (such as an illegal
> runt packet or a packet with RX_ER asserted) before GRS is asserted
> and does not receive any other frames, the controller may fail to set
> GRSC even when the receive logic is completely idle. Any subsequent
> receive frame that is larger than two bytes will reset the state so
> the graceful stop can complete. A MAC receiver (Rx) reset will also
> reset the state."
>
> This patch implements the proposed workaround:
>
> "If IEVENT[GRSC] is still not set after the timeout, read the eTSEC
> register at offset 0xD1C. If bits 7-14 are the same as bits 23-30,
> the eTSEC Rx is assumed to be idle and the Rx can be safely reset.
> If the register fields are not equal, wait for another timeout
> period and check again."
>
> Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
Applied.
next prev parent reply other threads:[~2010-06-30 18:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-29 20:59 [PATCH 1/3] gianfar: Implement workaround for eTSEC74 erratum Anton Vorontsov
2010-06-29 22:16 ` David Miller
2010-06-30 16:38 ` Anton Vorontsov
2010-06-30 16:39 ` [PATCH v2 " Anton Vorontsov
2010-06-30 18:37 ` David Miller
2010-06-30 16:39 ` [PATCH v2 2/3] gianfar: Implement workaround for eTSEC76 erratum Anton Vorontsov
2010-06-30 18:37 ` David Miller
2010-06-30 16:39 ` [PATCH v2 3/3] gianfar: Implement workaround for eTSEC-A002 erratum Anton Vorontsov
2010-06-30 18:37 ` David Miller [this message]
2010-06-30 18:37 ` [PATCH 1/3] gianfar: Implement workaround for eTSEC74 erratum David Miller
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