Re: 2GB MMC/SD cards

Russell King
2006-06-07T16:58:46Z

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