linux/drivers/mmc/core
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
..
bus.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
bus.h mmc: use sysfs groups to handle conditional attributes 2008-03-22 17:02:20 -07:00
core.c sdio: recognize io card without powercycle 2010-03-12 15:52:28 -08:00
core.h mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
debugfs.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
host.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
host.h mmc: add 'enable' and 'disable' methods to mmc host 2009-09-23 07:39:33 -07:00
Kconfig mmc: add module parameter to set whether cards are assumed removable 2009-12-15 08:53:35 -08:00
Makefile mmc: Export internal host state through debugfs 2008-07-27 01:26:16 +02:00
mmc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mmc_ops.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mmc_ops.h mmc: add mmc card sleep and awake support 2009-09-23 07:39:33 -07:00
sd.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sd_ops.c cleanup asm/scatterlist.h includes 2007-11-02 08:47:06 +01:00
sd_ops.h drivers/mmc/core/: make 3 functions static 2007-07-26 02:05:57 +02:00
sdio.c ARM: MXC: mxcmmc: work around a bug in the SDHC busy line handling 2010-04-14 09:18:07 +02:00
sdio_bus.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sdio_bus.h mmc: basic SDIO device model 2007-09-23 19:45:31 +02:00
sdio_cis.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sdio_cis.h sdio: split up common and function CIS parsing 2007-09-23 20:44:22 +02:00
sdio_io.c sdio: introduce API for special power management features 2010-03-06 11:26:36 -08:00
sdio_irq.c sdio: give sdio irq thread a host specific name 2008-10-12 11:04:30 +02:00
sdio_ops.c sdio: recognize io card without powercycle 2010-03-12 15:52:28 -08:00
sdio_ops.h sdio: recognize io card without powercycle 2010-03-12 15:52:28 -08:00