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# SPDX-License-Identifier: GPL-2.0-only
menuconfig MTD_ONENAND
tristate "OneNAND Device Support"
depends on MTD
depends on HAS_IOMEM
help
This enables support for accessing all type of OneNAND flash
devices.
if MTD_ONENAND
config MTD_ONENAND_VERIFY_WRITE
bool "Verify OneNAND page writes"
help
This adds an extra check when data is written to the flash. The
OneNAND flash device internally checks only bits transitioning
from 1 to 0. There is a rare possibility that even though the
device thinks the write was successful, a bit could have been
flipped accidentally due to device wear or something else.
config MTD_ONENAND_GENERIC
tristate "OneNAND Flash device via platform device driver"
help
Support for OneNAND flash via platform device driver.
config MTD_ONENAND_OMAP2
tristate "OneNAND on OMAP2/OMAP3 support"
depends on ARCH_OMAP2 || ARCH_OMAP3
depends on OF || COMPILE_TEST
help
Support for a OneNAND flash device connected to an OMAP2/OMAP3 SoC
via the GPMC memory controller.
Enable dmaengine and gpiolib for better performance.
config MTD_ONENAND_SAMSUNG
tristate "OneNAND on Samsung SOC controller support"
depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS4
help
Support for a OneNAND flash device connected to an Samsung SOC.
S3C64XX uses command mapping method.
S5PC110/S5PC210 use generic OneNAND method.
config MTD_ONENAND_OTP
bool "OneNAND OTP Support"
help
One Block of the NAND Flash Array memory is reserved as
a One-Time Programmable Block memory area.
Also, 1st Block of NAND Flash Array can be used as OTP.
The OTP block can be read, programmed and locked using the same
operations as any other NAND Flash Array memory block.
OTP block cannot be erased.
OTP block is fully-guaranteed to be a valid block.
config MTD_ONENAND_2X_PROGRAM
bool "OneNAND 2X program support"
help
The 2X Program is an extension of Program Operation.
Since the device is equipped with two DataRAMs, and two-plane NAND
Flash memory array, these two component enables simultaneous program
of 4KiB. Plane1 has only even blocks such as block0, block2, block4
while Plane2 has only odd blocks such as block1, block3, block5.
So MTD regards it as 4KiB page size and 256KiB block size
Now the following chips support it. (KFXXX16Q2M)
Demux: KFG2G16Q2M, KFH4G16Q2M, KFW8G16Q2M,
Mux: KFM2G16Q2M, KFN4G16Q2M,
And more recent chips
endif # MTD_ONENAND
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