Re: Block request processing for MMC/SD over SPI bus

David Brownell
2006-08-01T14:45:47Z

On Tuesday 01 August 2006 3:08 am, Hans Eklund wrote:

> As you can see om my LKML post, my driver covers (at first stage) everything
> from low level SPI commands and block device insertion to the request
> processing(since i at first could not connect to the MMC subsystem). Now,
> Russel King believes that you may have written a SPI to MMC subsytem driver.
> Correct? If so, whats the status on your driver?

Not entirely "my" driver, I just updated it and got it to partially enumerate
on some hardware that's a bit too weak for "real work":

http://sourceforge.net/mailarchive/forum.php?thread_id=13335072&forum_id=45866

... and there's the separate issue of the spi_claim()/spi_release() API
to take over an entire bus. Such an API could be used by other SPI based
interfaces; some in-system-programmers (including JTAG) need that same kind
of protocol tweaking hook for SPI.

- Dave