[PATCH v6 0/7] mtd: rawnand: Support bad block markers in first, second or last page

Schrempf Frieder frieder.schrempf at kontron.de
Wed Apr 17 05:36:33 PDT 2019


From: Frieder Schrempf <frieder.schrempf at kontron.de>

Currently supported bad block marker positions within the block are:
* in first page only
* in last page only
* in first or second page

After some cleanup and preparation in patches 1 to 4 we make it
possible to set NAND_BBM_FIRSTPAGE, NAND_BBM_SECONDPAGE and
NAND_BBM_LASTPAGE independently of each other (patch 5).

Some ESMT NANDs are known to have been shipped by the manufacturer
with bad block markers in the first or last page, instead of the
first or second page.

Also the datasheets for Cypress/Spansion/AMD NANDs claim that the
first, second *and* last page needs to be checked.

Therefore in patch 6 and 7 we set all three flags for
AMD/Spansion/Cypress and ESMT chips.
---
Changes in v6:
==============
* None (v5 was missing some of the mentioned fixes)

Changes in v5:
==============
* Rebase onto current nand/next
* Fix nand_bbm_get_next_page() docs
* Use inclusive values for start page in nand_bbm_get_next_page()
* Return -EINVAL from nand_bbm_get_next_page() when no more pages are available
* Improve code style in nand_block_bad()
* Add parentheses in scan_block_fast() and nand_default_block_markbad()
* Unsign badblockpos field in struct nand_chip and struct onenand_chip
* Add R-b tags

Changes in v4:
==============
* Move onenand changes to separate patch
* Add missing badblockpos field to onenand_chip struct
* Move cleanup of badblockpos field and flags to separate patch
* Move assignemnt of badblockpos from onenand_bbt.c to onenand_base.c
* Fix incorrect usage of bbt_options in nand_bbt.c
* Add R-b tags

Changes in v3:
==============
* Fix bit offsets for new flags in nand_chip->options
* Move separation of flags for first and second page markers to a
  separate patch
* Fix cover letter
* Fix S-o-b tag
* Add R-b tags

Changes in v2:
==============
* Rebase on 5.0-rc1
* Add patch to move bad block marker position info to a common place and
  rename/prepare existing flags
* improve/rename function nand_bbm_get_next_page() to use new flags
---
Frieder Schrempf (7):
  mtd: rawnand: Always store info about bad block markers in chip struct
  mtd: onenand: Store bad block marker position in chip struct
  mtd: nand: Cleanup flags and fields for bad block marker position
  mtd: nand: Make flags for bad block marker position more granular
  mtd: rawnand: Support bad block markers in first, second or last page
  mtd: rawnand: ESMT: Also use the last page for bad block markers
  mtd: rawnand: AMD: Also use the last page for bad block markers

 drivers/mtd/nand/onenand/onenand_base.c |  5 +-
 drivers/mtd/nand/onenand/onenand_bbt.c  |  3 --
 drivers/mtd/nand/raw/internals.h        |  1 +
 drivers/mtd/nand/raw/nand_amd.c         |  8 ++-
 drivers/mtd/nand/raw/nand_base.c        | 65 +++++++++++++++++--------
 drivers/mtd/nand/raw/nand_bbt.c         | 28 +++++------
 drivers/mtd/nand/raw/nand_esmt.c        |  9 +++-
 drivers/mtd/nand/raw/nand_hynix.c       |  4 +-
 drivers/mtd/nand/raw/nand_macronix.c    |  2 +-
 drivers/mtd/nand/raw/nand_micron.c      |  2 +-
 drivers/mtd/nand/raw/nand_samsung.c     |  4 +-
 drivers/mtd/nand/raw/nand_toshiba.c     |  2 +-
 drivers/mtd/nand/raw/sh_flctl.c         |  4 +-
 include/linux/mtd/bbm.h                 | 14 +-----
 include/linux/mtd/onenand.h             |  3 ++
 include/linux/mtd/rawnand.h             | 17 ++++++-
 16 files changed, 106 insertions(+), 65 deletions(-)

-- 
2.17.1



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