linux/drivers/mmc/host
Daniel Mack 3fcb027d7f ARM: MXC: mxcmmc: work around a bug in the SDHC busy line handling
MX3 SoCs have a silicon bug which corrupts CRC calculation of
multi-block transfers when connected SDIO peripheral doesn't drive the
BUSY line as required by the specs.

One way to prevent this is to only allow 1-bit transfers.

Another way is playing tricks with the DMA engine, but this isn't
mainline yet. So for now, we live with the performance drawback of 1-bit
transfers until a nicer solution is found.

This patch introduces a new host controller callback 'init_card' which
is for now only called from mmc_sdio_init_card().

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Volker Ernst <volker.ernst@txtr.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Michał Mirosław <mirqus@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2010-04-14 09:18:07 +02:00
..
at91_mci.c
atmel-mci-regs.h
atmel-mci.c
au1xmmc.c
bfin_sdh.c
cb710-mmc.c
cb710-mmc.h
davinci_mmc.c
imxmmc.c
imxmmc.h
Kconfig
Makefile
mmc_spi.c
mmci.c
mmci.h
msm_sdcc.c
msm_sdcc.h
mvsdio.c
mvsdio.h
mxcmmc.c ARM: MXC: mxcmmc: work around a bug in the SDHC busy line handling 2010-04-14 09:18:07 +02:00
of_mmc_spi.c
omap_hsmmc.c
omap.c
pxamci.c
pxamci.h
s3cmci.c
s3cmci.h
sdhci-of-core.c
sdhci-of-esdhc.c
sdhci-of-hlwd.c
sdhci-of.h
sdhci-pci.c
sdhci-pltfm.c
sdhci-s3c.c
sdhci.c
sdhci.h
sdricoh_cs.c
tifm_sd.c
tmio_mmc.c
tmio_mmc.h
via-sdmmc.c
wbsd.c
wbsd.h