On Thu, 10 Sep 2009 14:56:41 +0200
Albert Herranz <albert_herranz@xxxxxxxx> wrote:
> SDIO Simplified Specification V2.00 states that it is strongly recommended
> that the host executes either a power reset or issues a CMD52 (I/O Reset) to
> re-initialize an I/O only card or the I/O portion of a combo card.
> Additionally, the CMD52 must be issued first because it cannot be issued
> after a CMD0.
>
> With this patch the Nintendo Wii SDIO-based WLAN card is detected after a
> system reset, without requiring a complete system powercycle.
>
> Signed-off-by: Albert Herranz <albert_herranz@xxxxxxxx>
> ---
I had problems with cards already in the idle state crashing when I
sent them a reset. I suggest a big round of testing before merging this.
> @@ -182,3 +189,20 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
> return 0;
> }
>
> +int sdio_go_idle(struct mmc_host *host)
> +{
It might be clearer if you use the terminology from the spec, so either
sdio_abort() or sdio_reset().
Rgds
--
-- Pierre Ossman
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