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