From: pierre Tardy <tardyp@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [RFC] New MMC driver model
Date: Tue, 9 Jan 2007 14:25:37 +0000 (UTC) [thread overview]
Message-ID: <loom.20070109T150821-717@post.gmane.org> (raw)
In-Reply-To: 449553E5.9030004@drzeus.cx
Pierre Ossman <drzeus-list <at> drzeus.cx> writes:
>
> Register functions
> ==================
>
> I also intend to write a couple of register functions (sdio_read[bwl])
> so that card drivers doesn't have to deal with MMC requests more than
> necessary.
Good idea. Another need may be a sdio_read[bwl]_sync, which will poll for the
end of the cmd52s, instead of waiting for the irq. This polling is faster than
wait_for_completion/irq/tasklet/complete mechanism, which involve several
context switches.
> Endianness can also be handled there (SDIO are always LE).
I dont remember sdio spec forcing HW registers to be LE. Function 0 registers
are (BLKSZ for ex), but Function 1-7 register may be BE if the designers found
an advantage to it..
next prev parent reply other threads:[~2007-01-09 14:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-18 13:23 [RFC] New MMC driver model Pierre Ossman
2006-06-20 9:35 ` Marcel Holtmann
2006-06-20 12:46 ` Pierre Ossman
2006-06-20 17:46 ` Marcel Holtmann
2007-01-09 14:25 ` pierre Tardy [this message]
2007-01-10 20:34 ` Pierre Ossman
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