From: Todd Poynor <tpoynor@mvista.com>
To: andrew may <acmay@acmay.homeip.net>
Cc: Venkatesh Ramamurthy <rpranesh@hotmail.com>,
mporter@mvista.com, frank_rowand@mvista.com,
linuxppc-embedded@lists.linuxppc.org
Subject: Re: Linux on 440GP Networking issues
Date: Wed, 01 May 2002 12:23:23 -0700 [thread overview]
Message-ID: <3CD040AB.5000702@mvista.com> (raw)
In-Reply-To: 20020501120137.B9360@ecam.san.rr.com
>>Yep, the kernel tries to setup the second controller. But there is someting
>>very strange. Eventhough there is no network cable connected to the second
>>ethernet port , the OCP ENET driver says that it is 10Mbps, Link up and half
>>duplex.
The above is the default provided when autonegotiation doesn't turn up
anything useful, at least for the AMD Am79C875* PHYs (see ibm_ocp_phy.c:
mii_parse_Am79C875_pcr), which probably isn't the way to go. And
handling of the "no link" case does seem to need some work.
Could verify whether the lockup is related to configuring 2 EMACs by a
hack to ppc405_enet_open to return -ENODEV if fep->emac_num > 0. If
that boots fine then see if ppc405_eth_mal_dump shows registers such as
EMAC0's TXCTP0R or RXCTP0R changing values after EMAC1 is configured.
If so, that FIXME in the ppc405_enet_open code probably needs revisiting.
--
Todd
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next parent reply other threads:[~2002-05-01 19:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <F45zrLCCtgx8VUkRacU000059cf@hotmail.com>
[not found] ` <20020501120137.B9360@ecam.san.rr.com>
2002-05-01 19:23 ` Todd Poynor [this message]
2002-05-02 0:24 ` Linux on 440GP Networking issues Roland Dreier
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