From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: Matt Reimer <mattjreimer@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: 2GB MMC/SD cards
Date: Wed, 7 Jun 2006 17:58:37 +0100 [thread overview]
Message-ID: <20060607165837.GE13165@flint.arm.linux.org.uk> (raw)
In-Reply-To: <44869794.9080906@drzeus.cx>
On Wed, Jun 07, 2006 at 11:08:36AM +0200, Pierre Ossman wrote:
> New information. Version 4.2 of the MMC spec changes the wording to this:
>
> * WRITE_BL_LEN
> Block length for write operations. See READ_BL_LEN for field coding.
> Note that the support for 512B write access is mandatory for all cards.
>
> Similar wording for READ_BL_LEN, but that isn't of interest to us.
I wonder if all 2GB cards are >= v4.2 of the spec? If so, we could
do what would appear correct to both the spec and reality, and select
512 byte blocksizes irrespective if they conform to v4.2 or later.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
next prev parent reply other threads:[~2006-06-07 16:58 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-29 14:00 2GB MMC/SD cards Pierre Ossman
2006-06-03 14:15 ` Russell King
2006-06-03 15:02 ` Russell King
2006-06-03 18:40 ` Matt Reimer
2006-06-03 21:13 ` Pierre Ossman
2006-06-05 22:29 ` Jordan Crouse
2006-06-06 7:17 ` Richard Purdie
2006-06-05 22:52 ` Pierre Ossman
2006-06-07 9:08 ` Pierre Ossman
2006-06-07 16:58 ` Russell King [this message]
2006-06-07 20:36 ` Pierre Ossman
2006-06-08 23:01 ` Pierre Ossman
2006-06-22 15:08 ` Marcin Juszkiewicz
2006-08-13 10:14 ` Daniel Drake
2006-08-22 15:19 ` Juha Yrjola
2006-08-22 17:00 ` Jeff Chua
2006-08-23 18:28 ` Pierre Ossman
2006-08-25 9:07 ` Russell King
2006-06-03 21:11 ` Pierre Ossman
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