From: Alex Zeffertt <ajz@cambridgebroadband.com>
To: Li Yang-r58472 <LeoLi@freescale.com>
Cc: n.balaji@gdatech.co.in, linuxppc-embedded@ozlabs.org
Subject: Re: MPC8360E USB Host Controller Driver
Date: Thu, 07 Sep 2006 11:58:56 +0100 [thread overview]
Message-ID: <44FFFB70.2080903@cambridgebroadband.com> (raw)
In-Reply-To: <4879B0C6C249214CBE7AB04453F84E4D14C78C@zch01exm20.fsl.freescale.net>
>> manual, they told that this controller does not belong to
>> UHCI or OHCI standard.
>
> Yes, you can call it FHCI if you like. :)
I heard that on the PQII (82xx) devices the FHCI required
intervention from the core, even when there was zero traffic
on the USB. I think this was because the core had to
continuously service a 1ms interrupt. This generates significant
extra loading, making it worth considering using a cheap EHCI chip
instead....
Does anyone know if this is still the case with the PQII Pro (83xx)?
Alex
next prev parent reply other threads:[~2006-09-07 10:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-07 8:03 MPC8360E USB Host Controller Driver n.balaji
2006-09-07 8:25 ` Li Yang-r58472
2006-09-07 10:58 ` Alex Zeffertt [this message]
2006-09-07 11:19 ` Li Yang-r58472
2006-09-07 11:24 ` Laurent Pinchart
2006-09-07 12:07 ` Li Yang
2006-09-08 3:27 ` Li Yang-r58472
-- strict thread matches above, loose matches on Subject: below --
2006-09-07 11:12 Claus Gindhart
2006-09-07 11:20 ` Li Yang-r58472
2006-09-07 14:17 ` Alex Zeffertt
2006-09-07 18:37 ` Li Yang
2006-09-08 8:27 ` Alex Zeffertt
2006-09-09 1:09 Dan Gora
2006-09-11 9:08 ` Alex Zeffertt
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