From: Chris Ball <cjb@laptop.org>
To: Philip Rakity <prakity@marvell.com>
Cc: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
Albert Herranz <albert_herranz@yahoo.es>
Subject: Re: [BUG] CMD52 sent as first command not CMD0
Date: Sun, 6 Feb 2011 01:15:14 +0000 [thread overview]
Message-ID: <20110206011514.GA15322@void.printf.net> (raw)
In-Reply-To: <BC6C6C10-631A-4482-BA1B-C6F0057BC54A@marvell.com>
On Sat, Feb 05, 2011 at 04:52:12PM -0800, Philip Rakity wrote:
> nothing negative but reset is meant to reinit the card. This is the power up sequence for the 1st time a card is detected.
> There is no reason to do this if no card has yet enumerated. If a sdio card was there I completely agree with the mod since we need to reset
> the card.
>
> CMD0 should be the 1st command on an initial power up sequence. Does my code suggestion work for you ?
Okay -- yes, looks fine. Let's add a comment beforehand; something like:
/* If reinitalizing, we must send CMD52 before CMD0 for SDIO. */
--
Chris Ball <cjb@laptop.org> <http://printf.net/>
One Laptop Per Child
next prev parent reply other threads:[~2011-02-06 1:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-04 22:53 [BUG] CMD52 sent as first command not CMD0 Philip Rakity
2011-02-04 23:19 ` Philip Rakity
2011-02-06 0:38 ` Chris Ball
2011-02-06 0:52 ` Philip Rakity
2011-02-06 1:11 ` Philip Rakity
2011-02-06 1:15 ` Chris Ball [this message]
2011-02-06 1:35 ` Philip Rakity
2011-02-06 1:50 ` Chris Ball
2011-02-06 16:02 ` David Vrabel
2011-02-06 11:13 ` Albert Herranz
2011-02-06 20:50 ` Philip Rakity
2011-02-07 0:55 ` Nicolas Pitre
2011-02-06 16:09 ` Tardy, Pierre
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