Re: [PATCH 7/7] mmc_spi: support for non-byte-aligned cards

[Will Newton]

On Wed, Mar 11, 2009 at 3:14 PM, Wolfgang Mües
<wolfgang.mues@xxxxxxxxxxxx> wrote:
> Will,
>
> Am Mittwoch, 11. März 2009 schrieb Will Newton:
>> I have not seen these problems or seen them reported by others.
>
> Yes, it is hard to believe that such a design error is present in today SD
> cards. But spi mode is used only by some devices which do not have a SD host
> controller on board.

I have found some older cards that do not work well with SPI mode, but
I had written of these as ancient relics (128Mb or less in capacity).
I was under the impression that more mobile devices are using SPI mode
these days so SPI mode was becoming more of a priority for
manufacturers.

> I know a commercial FAT/SD card software package, and I found that inside
> their spi driver, there is support for non-byte-aligned cards too. So I am
> not the only one who has knowlegde about this problem.
>
> Should I send you one of these cards so you can verify this problem?

I would be interested to know the manufacturer and model number of a
couple of examples certainly, that way hopefully the test would be
truly independent.
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