From: Philipp Hachtmann <hachti@hachti•de>
To: linuxppc-embedded@ozlabs•org
Subject: U-boot and Xilinx emaclite, TX_PING_PONG -> stops working
Date: Sat, 16 Aug 2008 21:53:19 +0200 [thread overview]
Message-ID: <48A7302F.8030707@hachti.de> (raw)
In-Reply-To: <931ae8260808160434g1ff6d856n46e5e420e487db57@mail.gmail.com>
Hi all,
I use a Xilinx Virtex-4FX (with powerpc) Board (Ml403) with U-boot and
Linux.
I am currently wondering if someone has experience with the emaclite
driver. When I unset the "ping pong" (double buffering) parameters of
the core, I can use it unter Linux and U-boot. But the performance is
near to non-functional (wget tells me about 10kByte/sec).
Then I switched to double buffering. Now it runs very well - but only
under Linux.
I found a driver (xilinx_emaclite.c) in the U-boot git. That completely
refuses to work correctly (of course with parameters corrected). The
other driver I once found "somewhere" (in the Petalinux distribution).
It at least worked without the double buffering. Both drivers talk about
the ping pong options in their source, so I think they *should* know
about it.
Does anyone know that problem? Is there an improved driver around?
Best wishes,
Philipp
--
http://www.hachti.de
next prev parent reply other threads:[~2008-08-16 19:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-16 11:34 How to use ttyUL0 as input and use VGA as display? yanlong wang
2008-08-16 12:56 ` Anatolij Gustschin
2008-08-16 16:38 ` wangyanlong
2008-08-18 6:18 ` wangyanlong
2008-08-16 19:53 ` Philipp Hachtmann [this message]
2008-08-16 21:33 ` U-boot and Xilinx emaclite, TX_PING_PONG -> stops working jozsef imrek
2008-08-20 12:13 ` Michal Simek
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