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10938a08fc
As explained in the comment introduced above the fix, the Arasan controller driver starts an operation when the prog register is being written with a "type" specific to the action to perform. The prog type used until now to perform a CHANGE READ COLUMN with an SDR interface was the PAGE READ type (CMD + ADDR + CMD + DATA). Unfortunately, for an unknown reason (let's call this a silicon bug) any CHANGE READ COLUMN performed this way in NV-DDR mode will fail: the data ready flag will never be triggered, nor will be the transfer complete flag. Forcefully, this leads to a timeout situation which is not easy to handle. Fortunately, it was spotted that sending the same commands through a different prog register "type", CHANGE READ COLUMN ENHANCED, would work all the time (even though this particular command is not supported by the core and is only available in a limited set of devices - we only care about the controller configuration and not the actual command which is sent to the device). So let's use this type instead when a CHANGE READ COLUMN is requested. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20210505213750.257417-22-miquel.raynal@bootlin.com |
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chips | ||
devices | ||
hyperbus | ||
lpddr | ||
maps | ||
nand | ||
parsers | ||
spi-nor | ||
tests | ||
ubi | ||
ftl.c | ||
inftlcore.c | ||
inftlmount.c | ||
Kconfig | ||
Makefile | ||
mtd_blkdevs.c | ||
mtdblock.c | ||
mtdblock_ro.c | ||
mtdchar.c | ||
mtdconcat.c | ||
mtdcore.c | ||
mtdcore.h | ||
mtdoops.c | ||
mtdpart.c | ||
mtdpstore.c | ||
mtdsuper.c | ||
mtdswap.c | ||
nftlcore.c | ||
nftlmount.c | ||
rfd_ftl.c | ||
sm_ftl.c | ||
sm_ftl.h | ||
ssfdc.c |