[RFC,00/10] Macronix ECC engine

Message

Miquel Raynal Oct. 8, 2021, 4:22 p.m. UTC

Hello all,

This series is not 100% stable yet but I believe it should be
sent out in order to help other people trying to use the ECC framework
with a SPI controller. Basically, Macronix ECC engine can be used as an
external engine (takes the data, proceeds to the calculations, writes
back the ECC bytes) or as a pipelined engine doing on-the-fly
calculations (which is very common in the raw NAND world).

In the device tree, the ECC engine should be described as a separated DT
node. Then:
* external case: the flash node should provide a nand-ecc-engine
  property pointing to the ECC engine node.
* pipelined case: the flash node should provide a nand-ecc-engine
  property pointing to the SPI controller, itself with another
  nand-ecc-engine property pointing at the ECC engine node.

I will resubmit this later when I will be done validating the hardware
and the driver.

Cheers,
Miquèl

Mason Yang (1):
  mtd: spinand: macronix: Use random program load

Miquel Raynal (9):
  mtd: spinand: Fix comment
  dt-bindings: vendor-prefixes: Update Macronix prefix
  dt-bindings: mtd: Describe Macronix NAND ECC engine
  mtd: nand: ecc: Add infrastructure to support hardware engines
  mtd: nand: mxic-ecc: Add Macronix external ECC engine support
  mtd: nand: mxic-ecc: Support SPI pipelined mode
  spi: mxic: Fix the transmit path
  spi: mxic: Add support for direct mapping
  spi: mxic: Add support for pipelined ECC operations

 .../bindings/mtd/mxic,nand-ecc-engine.yaml    |  78 ++
 .../devicetree/bindings/vendor-prefixes.yaml  |   3 +
 drivers/mtd/nand/Kconfig                      |   6 +
 drivers/mtd/nand/Makefile                     |   1 +
 drivers/mtd/nand/core.c                       |  10 +-
 drivers/mtd/nand/ecc-mxic.c                   | 797 ++++++++++++++++++
 drivers/mtd/nand/ecc.c                        |  89 ++
 drivers/mtd/nand/spi/core.c                   |   2 +-
 drivers/mtd/nand/spi/macronix.c               |   2 +-
 drivers/spi/spi-mxic.c                        | 309 ++++++-
 include/linux/mtd/nand-ecc-mxic.h             |  36 +
 include/linux/mtd/nand.h                      |  11 +
 12 files changed, 1296 insertions(+), 48 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/mxic,nand-ecc-engine.yaml
 create mode 100644 drivers/mtd/nand/ecc-mxic.c
 create mode 100644 include/linux/mtd/nand-ecc-mxic.h