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mtd: rawnand: Separate the ECC engine type and the ECC byte placement

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The use of "syndrome" placement should not be encoded in the ECC
engine mode/type.

Create a "placement" field in NAND chip and change all occurrences of
the NAND_ECC_HW_SYNDROME enumeration to be just NAND_ECC_HW and
possibly a placement entry like NAND_ECC_PLACEMENT_INTERLEAVED.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://lore.kernel.org/linux-mtd/20200827085208.16276-10-miquel.raynal@bootlin.com
This commit is contained in:
Miquel Raynal
2020-08-27 10:51:57 +02:00
parent a8c7ffdb5f
commit ef24f97daa
10 changed files with 71 additions and 48 deletions
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6
include/linux/mtd/rawnand.h
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@@ -304,6 +304,7 @@ static const struct nand_ecc_caps __name = { \
/**
* struct nand_ecc_ctrl - Control structure for ECC
* @mode: ECC mode
* @placement: OOB bytes placement
* @algo: ECC algorithm
* @steps: number of ECC steps per page
* @size: data bytes per ECC step
@@ -331,7 +332,7 @@ static const struct nand_ecc_caps __name = { \
* controller and always return contiguous in-band and
* out-of-band data even if they're not stored
* contiguously on the NAND chip (e.g.
* NAND_ECC_HW_SYNDROME interleaves in-band and
* NAND_ECC_PLACEMENT_INTERLEAVED interleaves in-band and
* out-of-band data).
* @write_page_raw: function to write a raw page without ECC. This function
* should hide the specific layout used by the ECC
@@ -339,7 +340,7 @@ static const struct nand_ecc_caps __name = { \
* in-band and out-of-band data. ECC controller is
* responsible for doing the appropriate transformations
* to adapt to its specific layout (e.g.
* NAND_ECC_HW_SYNDROME interleaves in-band and
* NAND_ECC_PLACEMENT_INTERLEAVED interleaves in-band and
* out-of-band data).
* @read_page: function to read a page according to the ECC generator
* requirements; returns maximum number of bitflips corrected in
@@ -356,6 +357,7 @@ static const struct nand_ecc_caps __name = { \
*/
struct nand_ecc_ctrl {
enum nand_ecc_mode mode;
enum nand_ecc_placement placement;
enum nand_ecc_algo algo;
int steps;
int size;