Re: poor performance with W2CBW003 (Marvell 8686)

hong zhang
2012-06-14T16:11:08Z

bit mode and interrupt or PIO are configured in SDIO hoster side.
Not in driver side.

--- On Thu, 6/14/12, Andreas Kemnade <andreas@kemnade.info> wrote:

> From: Andreas Kemnade <andreas@kemnade.info>
> Subject: Re: poor performance with W2CBW003 (Marvell 8686)
> To: "hong zhang" <henryzhang62@yahoo.com>
> Cc: "Dan Williams" <dcbw@redhat.com>, linux-wireless@vger.kernel.org, dsd@laptop.org, libertas-dev@lists.infradead.org
> Date: Thursday, June 14, 2012, 12:45 AM
> Hi,
>
> On Wed, 13 Jun 2012 11:39:08 -0700 (PDT)
> hong zhang <henryzhang62@yahoo.com>
> wrote:
>
> > You have to identify problem caused by
> > SDIO host controller or wifi driver.
> >
> > If driver is working well in x86 with Roch SDIO, that
> means wifi driver is ok.
> >
> > You have to find out
> > 1. SDIO interface if using Interrupt or PIO
>
> Hmm, very interesting point, of course, there are
> interrupts. But after reading
> the commit logs in the patched 2.6.32 kernel I see there is
> a patch enabling
> asynchronous *sdio* interrupts. That looks clearly
> suspicious.
>
> > 2. 1 bit or 4 bit
>
> Hmm, 4bit.
>
> Greetings
> Andreas Kemnade
>