diff options
| author | Albert Herranz <albert_herranz@yahoo.es> | 2010-03-10 15:20:37 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-12 15:52:28 -0800 |
| commit | 516a82422209e078345d0ca54b16793d7bfd4782 (patch) | |
| tree | c0f44619451e3ae5d40f6cacd953a5ad209412e3 /drivers/mmc/core/sdio_ops.h | |
| parent | d0ab4a4d5094e5d17b103dc5073529a04f00a469 (diff) | |
sdio: recognize io card without powercycle
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@yahoo.es>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc/core/sdio_ops.h')
| -rw-r--r-- | drivers/mmc/core/sdio_ops.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio_ops.h b/drivers/mmc/core/sdio_ops.h index e2e74b0d17d8..12a4d3ab174c 100644 --- a/drivers/mmc/core/sdio_ops.h +++ b/drivers/mmc/core/sdio_ops.h @@ -17,6 +17,7 @@ int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, unsigned addr, u8 in, u8* out); int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz); +int sdio_reset(struct mmc_host *host); #endif |