u-boot.git/drivers/mtd, branch v2022.04

mtd: gpmi: fix the bch setting backward compatible issue

2022-03-28T12:22:17+00:00

Previous u-boot code changed the default bch setting behavior and caused
backward compatible issue. This fix choose the legacy bch geometry back
again as the default option. If the minimum ecc strength that NAND chips
required need to be chosen, it can be enabled by either adding DT flag
"fsl,use-minimum-ecc" or CONFIG_NAND_MXS_USE_MINIMUM_ECC in configs. The
unused flag "fsl,legacy-bch-geometry" get removed.

Fixes: 51cdf83eea (mtd: gpmi: provide the option to use legacy bch geometry)
Fixes: 616f03daba (mtd: gpmi: change the BCH layout setting for large oob NAND)
Tested-by: Tim Harvey 
Tested-by: Sean Nyekjaer 
Signed-off-by: Han Xu 
Reviewed-by: Miquel Raynal

mtd: rawnand: stm32_fmc2: add NAND Write Protect support

2022-03-15T08:10:52+00:00

This patch adds the support of the WP# signal. WP will be disabled
before the first access to the NAND flash.

Signed-off-by: Christophe Kerello 
Reviewed-by: Patrice Chotard

mtd: spi-nor-ids: Enable quad read for Gigadevice gd25lq128

2022-03-11T19:40:01+00:00

The Gigadevice gd25lq128 serial flash exists in different versions,
all which identify themselves using the same JEDEC id.

gd25lq128c:
https://www.gigadevice.com/datasheet/gd25lq128

gd25lq128d:
https://www.gigadevice.com/datasheet/gd25lq128d

However, all versions support quad read, so enable it.
Tested and verified on the Sipeed MAix BiT board.

Fixes: 30b9a28a3f2d ("mtd: spi-nor-ids: Add Gigadevice gd25lq128 ID")
Signed-off-by: Niklas Cassel 
Reviewed-by: Jagan Teki

mtd: cfi_mtd: populate mtd->dev with flash_info->dev

2022-02-01T09:56:25+00:00

Populate mtd->dev with flash_info->dev which allows to get
full mtd information using the "mtd list" command.
Before, "mtd list" command returns :

List of MTD devices:
* nor0
  - type: NOR flash
  - block size: 0x40000 bytes
  - min I/O: 0x1 bytes
  - 0x000000000000-0x000004000000 : "nor0"

After this patch we get for example:

List of MTD devices:
* nor0
  - device: flash@0
  - parent: spi@40430000
  - driver: cfi_flash
  - path: /soc/spi@40430000/flash@0
  - type: NOR flash
  - block size: 0x40000 bytes
  - min I/O: 0x1 bytes
  - 0x000000000000-0x000004000000 : "nor0"

Signed-off-by: Patrice Chotard 
Reviewed-by: Stefan Roese

configs: Migrate CONFIG_SYS_MAX_FLASH_BANKS to Kconfig

2022-01-21T19:01:35+00:00

Use moveconfig.py script to convert define CONFIG_SYS_MAX_FLASH_BANKS
and CONFIG_SYS_MAX_FLASH_BANKS_DETECT to Kconfig and move these entries
to defconfigs.

Signed-off-by: Patrick Delaunay 
Reviewed-by: Simon Glass 
Reviewed-by: Stefan Roese 
[trini: Re-switch to IS_ENABLED check in spi-nor-core.c, re-run migration]
Signed-off-by: Tom Rini

mtd: cfi: change CONFIG_SYS_MAX_FLASH_BANKS_DETECT as boolean

2022-01-21T19:01:35+00:00

Prepare migration to Kconfig.

CONFIG_SYS_MAX_FLASH_BANKS_DETECT becomes boolean and
CONFIG_SYS_MAX_FLASH_BANKS define the MAX size, also used
for detection when CONFIG_SYS_MAX_FLASH_BANKS_DETECT=y
(CFI_MAX_FLASH_BANKS = CONFIG_SYS_MAX_FLASH_BANKS).

CONFIG_SYS_MAX_FLASH_BANKS become mandatory when
CONFIG_SYS_MAX_FLASH_BANKS_DETECT is activated.

Signed-off-by: Patrick Delaunay 
Reviewed-by: Stefan Roese

mtd: cfi: introduce CFI_FLASH_BANKS

2022-01-21T19:01:35+00:00

Replace CONFIG_SYS_MAX_FLASH_BANKS by CFI_FLASH_BANKS to prepare
Kconfig migration and avoid to redefine CONFIG_SYS_MAX_FLASH_BANKS
in cfi_flash.h.

After this patch CONFIG_SYS_MAX_FLASH_BANKS should be never used in
the cfi code: use CFI_MAX_FLASH_BANKS for struct size or CFI_FLASH_BANKS
for number of CFI banks which can be dynamic.

This patch modify all the files which include mtd/cfi_flash.h.

Signed-off-by: Patrick Delaunay 
Reviewed-by: Stefan Roese

doc: replace @return by Return:

2022-01-19T17:11:34+00:00

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt

mtd: nand: pxa3xx: set mtd->dev

2022-01-17T19:45:24+00:00

Currently the pxa3xx driver does not set the udevice in the mtd_info
struct and this prevents the mtd from parsing the partitions via DTS
like for SPI-NOR.

So simply set the mtd->dev to the driver udevice.

Signed-off-by: Robert Marko 
Reviewed-by: Stefan Roese

nand: gpmc: Handle bitflips in erased pages when using BCH ECC engine

2022-01-16T13:31:03+00:00

In the case of an erased (sub)page both the data and ECC are all 0xFF
bytes. This fails the normal ECC verification, as the computed ECC of
all-0xFF is not also 0xFF. The GPMC NAND driver attempted to detect
erased pages by checking that the ECC bytes are all-0xFF, but this had
two problems:
1) bitflips in the data were not corrected, so the data looked not-erased
2) bitflips in the ECC bytes were reported as uncorrectable ECC errors

The equivalent Linux driver [1] correctly handles this by counting the
number of 0-bits in the combination of data and ECC bytes. If the number
of 0-bits is less than the amount of bits correctable by the selected
ECC algorithm, then it is treated as an erased page with correctable
bitflips.

Implement similar, though simplified, logic in omap_correct_data_bch().

[1] see omap_elm_correct_data() in omap2.c

Signed-off-by: David Rivshin