From: Romain Izard <romain.izard.pro@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] generic mmc bug in reading sd card capacity
Date: Tue, 6 Nov 2012 08:41:06 +0000 (UTC) [thread overview]
Message-ID: <k7aif2$r2o$1@ger.gmane.org> (raw)
In-Reply-To: 02e101cdb8c9$7a25fe60$6e71fb20$@keyasic.com
On 2012-11-02, victor <victor@keyasic.com> wrote:
> Hi All,
>
> Accord to SD spec 2.0, the formula to find out sd card capacity is:
>
> memory capacity = (C_SIZE+1) * 512K byte
> and
> C_SIZE is from CSD [69:48]
>
> Thus, the code in generic mmc is wrong for the high capacity sd card. My
> patch is below.
>
We should be careful about the fact that this only works for SD cards.
The size parameter is handled differently on MMC devices larger than
2 GiB. What do you think of the following patch:
(Compile tested only, I do not have a board available for testing right now)
8<----------------------------------------------------------------------
prev parent reply other threads:[~2012-11-06 8:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-02 7:12 [U-Boot] generic mmc bug in reading sd card capacity victor
2012-11-06 8:41 ` Romain Izard [this message]
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