From: Michal Simek <monstr@seznam•cz>
To: Philipp Hachtmann <hachti@hachti•de>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: U-boot and Xilinx emaclite, TX_PING_PONG -> stops working
Date: Wed, 20 Aug 2008 14:13:15 +0200 [thread overview]
Message-ID: <48AC0A5B.3060909@seznam.cz> (raw)
In-Reply-To: <48A7302F.8030707@hachti.de>
Hi Philipp,
I did U-BOOT driver for emaclite. You can set both ping pong mode - all
combination are supported. I tested this driver with Microblaze and works well.
I use this driver almost every day and I have no problem with it. If you have
problem with this driver please send your email to u-boot mailing list.
Regards,
Michal
> 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
>
>
>
>
>
prev parent reply other threads:[~2008-08-20 12:26 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 ` U-boot and Xilinx emaclite, TX_PING_PONG -> stops working Philipp Hachtmann
2008-08-16 21:33 ` jozsef imrek
2008-08-20 12:13 ` Michal Simek [this message]
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