[PATCH 00/15] mtd: nand: allow vendor specific detection/initialization

From: Boris Brezillon
Date: Fri May 27 2016 - 08:58:58 EST


This patch series is a step forward in supporting vendor-specific
This series is mainly moving vendor-specific initialization or
detection code out of the core, but also introduces an infrastructure
allowing support for vendor-specific features.

While those features might seem useless to most users, some of them are
actually required on modern MLC/TLC NANDs (this is the case of read-retry
support, which AFAICT has not been standardized by the JEDEC consortium).

Now, let's detail what's inside this patch-set.

Patches 1 to 4 are simple reworks simplifying auto-detection function
prototypes, and clarifying their purpose.

Patch 5 is introducing the vendor-specific initialization

Patch 6 is removing the MTD_NAND_IDS Kconfig option to avoid creating
a nand_ids.ko module when MTD_NAND is enabled as a module. This prevents
a future cross-dependency between nand.ko where all vendor specific
code will rely and nand_ids.ko which will reference vendor-specific ops
in its manufacturer table, which in turn is referenced by the core code
linked in nand.ko.

Patches 7 to 12 are moving vendor-specific code into their respective
nand_<vendor>.c files.

Patch 13 is taking a patch proposed by Hans and adding support for ECC
requirements extraction from the samsung extended IDs. It seems to apply
to all Samsung MLCs, but even if it's not the case, the detection code
should be improved to support the new formats.

Patch 14 is adding support for advanced NAND ID decoding to the Hynix
driver (OOB size, ECC and scrambling requirements extraction). Again
this detection code might be incomplete, but I'd like people to extend
it if required rather than adding new full-id entries in the nand_ids

And finally, patch 15 is showing how useful this vendor-specific stuff
can be by implementing read-retry support for Hynix 1x nm MLCs. And
trust me, you don't want to try using such a NAND without read-retry
support ;).

As always, I'm open to any suggestion to improve this vendor-specific
infrastructure, so please review the code :).



Boris Brezillon (14):
mtd: nand: get rid of the mtd parameter in all auto-detection
mtd: nand: store nand ID in struct nand_chip
mtd: nand: get rid of busw parameter
mtd: nand: rename nand_get_flash_type() into nand_detect()
mtd: nand: add vendor specific initialization step
mtd: nand: kill the MTD_NAND_IDS Kconfig option
mtd: nand: move samsung specific initialization in nand_samsung.c
mtd: nand: move hynix specific initialization in nand_hynix.c
mtd: nand: move toshiba specific initialization in nand_toshiba.c
mtd: nand: move micron specific initialization in nand_micron.c
mtd: nand: move AMD/Spansion specific initialization in nand_amd.c
mtd: nand: move Macronix specific initialization in nand_macronix.c
mtd: nand: hynix: rework NAND ID decoding to extract more information
mtd: nand: hynix: add read-retry support for 1x nm MLC NANDs

Hans de Goede (1):
mtd: nand: samsung: retrieve ECC requirements from extended ID

arch/cris/arch-v32/drivers/Kconfig | 1 -
drivers/mtd/nand/Kconfig | 4 -
drivers/mtd/nand/Makefile | 9 +-
drivers/mtd/nand/nand_amd.c | 60 ++++
drivers/mtd/nand/nand_base.c | 362 +++++++--------------
drivers/mtd/nand/nand_hynix.c | 623 +++++++++++++++++++++++++++++++++++++
drivers/mtd/nand/nand_ids.c | 21 +-
drivers/mtd/nand/nand_macronix.c | 27 ++
drivers/mtd/nand/nand_micron.c | 84 +++++
drivers/mtd/nand/nand_samsung.c | 110 +++++++
drivers/mtd/nand/nand_toshiba.c | 60 ++++
include/linux/mtd/nand.h | 64 ++--
12 files changed, 1141 insertions(+), 284 deletions(-)
create mode 100644 drivers/mtd/nand/nand_amd.c
create mode 100644 drivers/mtd/nand/nand_hynix.c
create mode 100644 drivers/mtd/nand/nand_macronix.c
create mode 100644 drivers/mtd/nand/nand_micron.c
create mode 100644 drivers/mtd/nand/nand_samsung.c
create mode 100644 drivers/mtd/nand/nand_toshiba.c