Messages in this thread | | | From | Boris Brezillon <> | Subject | [PATCH v2 0/3] mtd: nand: add randomizer support | Date | Wed, 2 Dec 2015 12:01:04 +0100 |
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Hello,
This series is a proposal to add support for randomizers (either software or hardware) to NAND flash controller drivers.
The last patch is the sunxi HW randomizer implementation and is just given as an example (it won't apply on the MTD tree, because it depends on other stuff not yet posted on the MTD ML, but if you want a full overview of the NAND Flash controller driver you can take a look at this series [2]).
I can also provide a software implementation based on LFSR (Left Feedback Shift Register) algorithm, thought I haven't tested it yet, hence why it's not part of this series. Let me know if you're interested in this implementation.
This series depends on the "per-partition ECC" series [1], because I need the randomizer seed to be different depending on the partition (for the same reason I needed ECC config to be different for each partition: the bootrom config might not fit the NAND chip requirements).
I'd like to have feedback from both MTD maintainers and driver developers who might need to implement (or use) a randomizer in their system, so feel free to comment on this series.
Best Regards,
Boris
[1] https://lkml.org/lkml/2014/2/12/627 [2] https://groups.google.com/forum/#!msg/linux-sunxi/s3lBb01I0Js/z2NoCFJ83g4J
Changes since v1: - add some comments to explain how the sunxi randomizer works - fix a few minor bugs and coding style issues
Boris Brezillon (3): mtd: nand: add NAND_NEED_SCRAMBLING option flag mtd: nand: add NAND_NEED_SCRAMBLING flag to the H27UCG8T2ATR-BC definition mtd: nand: sunxi: add randomizer support
drivers/mtd/nand/nand_ids.c | 4 +- drivers/mtd/nand/sunxi_nand.c | 287 ++++++++++++++++++++++++++++++++++++++---- include/linux/mtd/nand.h | 6 + 3 files changed, 269 insertions(+), 28 deletions(-)
-- 2.1.4
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