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Add function to check if kernel support raw_mode and fix function that
calculates the geometry based on known info from the mtd partitionmtd
geometry.
These patches were copied from:
https://github.com/Gateworks/openwrt/commit/379e87df4fb67198fe900ffe2a394e69fbd47801
Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
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This patch fixes a build error with kernel includes (>= 4.4)
<stdint.h> must be explicitly included to get uintX_t types.
Change-Id: I3a0059a59bf578fdba0cf68370eec0e19fc10835
Signed-off-by: Gary Thomas <gary@mlbassoc.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
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- Check raw mode flag for backward compatbility
- Fix membership name in bch geometry structure.
- Fix the previous implementation that may ruin the BBM
- Adapt raw page accesses to match the new raw_read/write implementation
The old raw access implementation (in GPMI driver) was considering that
data and OOB data were separated in their respective regions (the data
area and the OOB area of the page), which is not true.
They are actually interleaved this way:
METADATA + ((DATA + ECCBYTES) * N)
The new raw access implementation (in the GPMI driver) is hiding this
weird
layout to MTD users by exposing a more common layout:
DATA + METADATA + (N * ECCBYTES)
Here METADATA + (N * ECCBYTES) are exposed as if they were stored in the
OOB area.
Unfortunately kobs-ng rely on this weird layout when accessing the NAND
in raw mode.
Signed-off-by: Lauren Post <lauren.post@nxp.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
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Fabio Berton
Gary Thomas
Lauren Post