This serie of patches speed up access time of MVEBUMMC driver
This is allowed by a fix in MVEBUMMC init status check inspired from linux
MVSDIO driver.
* Hardware weirdness. The FIFO_EMPTY bit of the HW_STATE
* register is sometimes not set before a while when some
* "unusual" data block sizes are used (such as with the SWITCH
* command), even despite the fact that the XFER_DONE interrupt
* was raised. And if another data transfer starts before
* this bit comes to good sense (which eventually happens by
* itself) then the new transfer simply fails with a timeout.
It allows about 10x to 40x faster access time transfer on SHEEVAPLUG MMC
It may also fixes some SD types incompatibilities
### before patch
Marvell>> ext2load mmc 0:1 0x800000 uImage
1613392 bytes read in 977 ms (1.6 MiB/s)
### with fix
Marvell>> ext2load mmc 0:1 0x800000 uImage
1613392 bytes read in 83 ms (18.5 MiB/s)
Gérald Kerma (6):
MVEBUMMC : Change copyright date
MVEBUMMC : Speed up access time
MVEBUMMC : FIX debug strings
MVEBUMMC : REMOVE unnecessary delays
MVEBUMMC : CLEAN code
MVEBUMMC : REMOVE unnecessary delay from init
drivers/mmc/mvebu_mmc.c | 103 ++++++++++++++++++++++++++++--------------------
include/mvebu_mmc.h | 1 +
2 files changed, 61 insertions(+), 43 deletions(-)
--
2.1.3
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