# drivers/mtd/nand/Kconfig menuconfig MTD_NAND tristate "NAND Device Support" depends on MTD select MTD_NAND_IDS help This enables support for accessing all type of NAND flash devices. For further information see . if MTD_NAND config MTD_NAND_VERIFY_WRITE bool "Verify NAND page writes" help This adds an extra check when data is written to the flash. The NAND 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_NAND_ECC_SMC bool "NAND ECC Smart Media byte order" default n help Software ECC according to the Smart Media Specification. The original Linux implementation had byte 0 and 1 swapped. config MTD_NAND_MUSEUM_IDS bool "Enable chip ids for obsolete ancient NAND devices" depends on MTD_NAND default n help Enable this option only when your board has first generation NAND chips (page size 256 byte, erase size 4-8KiB). The IDs of these chips were reused by later, larger chips. config MTD_NAND_AUTCPU12 tristate "SmartMediaCard on autronix autcpu12 board" depends on ARCH_AUTCPU12 help This enables the driver for the autronix autcpu12 board to access the SmartMediaCard. config MTD_NAND_EDB7312 tristate "Support for Cirrus Logic EBD7312 evaluation board" depends on ARCH_EDB7312 help This enables the driver for the Cirrus Logic EBD7312 evaluation board to access the onboard NAND Flash. config MTD_NAND_H1900 tristate "iPAQ H1900 flash" depends on ARCH_PXA && MTD_PARTITIONS help This enables the driver for the iPAQ h1900 flash. config MTD_NAND_SPIA tristate "NAND Flash device on SPIA board" depends on ARCH_P720T help If you had to ask, you don't have one. Say 'N'. config MTD_NAND_AMS_DELTA tristate "NAND Flash device on Amstrad E3" depends on MACH_AMS_DELTA help Support for NAND flash on Amstrad E3 (Delta). config MTD_NAND_TS7250 tristate "NAND Flash device on TS-7250 board" depends on MACH_TS72XX help Support for NAND flash on Technologic Systems TS-7250 platform. config MTD_NAND_IDS tristate config MTD_NAND_AU1550 tristate "Au1550/1200 NAND support" depends on SOC_AU1200 || SOC_AU1550 help This enables the driver for the NAND flash controller on the AMD/Alchemy 1550 SOC. config MTD_NAND_BF5XX tristate "Blackfin on-chip NAND Flash Controller driver" depends on (BF54x || BF52x) && MTD_NAND help This enables the Blackfin on-chip NAND flash controller No board specific support is done by this driver, each board must advertise a platform_device for the driver to attach. This driver can also be built as a module. If so, the module will be called bf5xx-nand. config MTD_NAND_BF5XX_HWECC bool "BF5XX NAND Hardware ECC" default y depends on MTD_NAND_BF5XX help Enable the use of the BF5XX's internal ECC generator when using NAND. config MTD_NAND_BF5XX_BOOTROM_ECC bool "Use Blackfin BootROM ECC Layout" default n depends on MTD_NAND_BF5XX_HWECC help If you wish to modify NAND pages and allow the Blackfin on-chip BootROM to boot from them, say Y here. This is only necessary if you are booting U-Boot out of NAND and you wish to update U-Boot from Linux' userspace. Otherwise, you should say N here. If unsure, say N. config MTD_NAND_RTC_FROM4 tristate "Renesas Flash ROM 4-slot interface board (FROM_BOARD4)" depends on SH_SOLUTION_ENGINE select REED_SOLOMON select REED_SOLOMON_DEC8 select BITREVERSE help This enables the driver for the Renesas Technology AG-AND flash interface board (FROM_BOARD4) config MTD_NAND_PPCHAMELEONEVB tristate "NAND Flash device on PPChameleonEVB board" depends on PPCHAMELEONEVB && BROKEN help This enables the NAND flash driver on the PPChameleon EVB Board. config MTD_NAND_S3C2410 tristate "NAND Flash support for S3C2410/S3C2440 SoC" depends on ARCH_S3C2410 help This enables the NAND flash controller on the S3C2410 and S3C2440 SoCs No board specific support is done by this driver, each board must advertise a platform_device for the driver to attach. config MTD_NAND_S3C2410_DEBUG bool "S3C2410 NAND driver debug" depends on MTD_NAND_S3C2410 help Enable debugging of the S3C2410 NAND driver config MTD_NAND_S3C2410_HWECC bool "S3C2410 NAND Hardware ECC" depends on MTD_NAND_S3C2410 help Enable the use of the S3C2410's internal ECC generator when using NAND. Early versions of the chip have had problems with incorrect ECC generation, and if using these, the default of software ECC is preferable. config MTD_NAND_NDFC tristate "NDFC NanD Flash Controller" depends on 4xx && !PPC_MERGE select MTD_NAND_ECC_SMC help NDFC Nand Flash Controllers are integrated in IBM/AMCC's 4xx SoCs config MTD_NAND_S3C2410_CLKSTOP bool "S3C2410 NAND IDLE clock stop" depends on MTD_NAND_S3C2410 default n help Stop the clock to the NAND controller when there is no chip selected to save power. This will mean there is a small delay when the is NAND chip selected or released, but will save approximately 5mA of power when there is nothing happening. config MTD_NAND_DISKONCHIP tristate "DiskOnChip 2000, Millennium and Millennium Plus (NAND reimplementation) (EXPERIMENTAL)" depends on EXPERIMENTAL select REED_SOLOMON select REED_SOLOMON_DEC16 help This is a reimplementation of M-Systems DiskOnChip 2000, Millennium and Millennium Plus as a standard NAND device driver, as opposed to the earlier self-contained MTD device drivers. This should enable, among other things, proper JFFS2 operation on these devices. config MTD_NAND_DISKONCHIP_PROBE_ADVANCED bool "Advanced detection options for DiskOnChip" depends on MTD_NAND_DISKONCHIP help This option allows you to specify nonstandard address at which to probe for a DiskOnChip, or to change the detection options. You are unlikely to need any of this unless you are using LinuxBIOS. Say 'N'. config MTD_NAND_DISKONCHIP_PROBE_ADDRESS hex "Physical address of DiskOnChip" if MTD_NAND_DISKONCHIP_PROBE_ADVANCED depends on MTD_NAND_DISKONCHIP default "0" ---help--- By default, the probe for DiskOnChip devices will look for a DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000. This option allows you to specify a single address at which to probe for the device, which is useful if you have other devices in that range which get upset when they are probed. (Note that on PowerPC, the normal probe will only check at 0xE4000000.) Normally, you should leave this set to zero, to allow the probe at the normal addresses. config MTD_NAND_DISKONCHIP_PROBE_HIGH bool "Probe high addresses" depends on MTD_NAND_DISKONCHIP_PROBE_ADVANCED help By default, the probe for DiskOnChip devices will look for a DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000. This option changes to make it probe between 0xFFFC8000 and 0xFFFEE000. Unless you are using LinuxBIOS, this is unlikely to be useful to you. Say 'N'. config MTD_NAND_DISKONCHIP_BBTWRITE bool "Allow BBT writes on DiskOnChip Millennium and 2000TSOP" depends on MTD_NAND_DISKONCHIP help On DiskOnChip devices shipped with the INFTL filesystem (Millennium and 2000 TSOP/Alon), Linux reserves some space at the end of the device for the Bad Block Table (BBT). If you have existing INFTL data on your device (created by non-Linux tools such as M-Systems' DOS drivers), your data might overlap the area Linux wants to use for the BBT. If this is a concern for you, leave this option disabled and Linux will not write BBT data into this area. The downside of leaving this option disabled is that if bad blocks are detected by Linux, they will not be recorded in the BBT, which could cause future problems. Once you enable this option, new filesystems (INFTL or others, created in Linux or other operating systems) will not use the reserved area. The only reason not to enable this option is to prevent damage to preexisting filesystems. Even if you leave this disabled, you can enable BBT writes at module load time (assuming you build diskonchip as a module) with the module parameter "inftl_bbt_write=1". config MTD_NAND_SHARPSL tristate "Support for NAND Flash on Sharp SL Series (C7xx + others)" depends on ARCH_PXA config MTD_NAND_BASLER_EXCITE tristate "Support for NAND Flash on Basler eXcite" depends on BASLER_EXCITE help This enables the driver for the NAND flash device found on the Basler eXcite Smart Camera. If built as a module, the driver will be named "excite_nandflash.ko". config MTD_NAND_CAFE tristate "NAND support for OLPC CAFÉ chip" depends on PCI select REED_SOLOMON select REED_SOLOMON_DEC16 help Use NAND flash attached to the CAFÉ chip designed for the OLPC laptop. config MTD_NAND_CS553X tristate "NAND support for CS5535/CS5536 (AMD Geode companion chip)" depends on X86_32 && (X86_PC || X86_GENERICARCH) help The CS553x companion chips for the AMD Geode processor include NAND flash controllers with built-in hardware ECC capabilities; enabling this option will allow you to use these. The driver will check the MSRs to verify that the controller is enabled for NAND, and currently requires that the controller be in MMIO mode. If you say "m", the module will be called "cs553x_nand.ko". config MTD_NAND_ATMEL tristate "Support for NAND Flash / SmartMedia on AT91 and AVR32" depends on ARCH_AT91 || AVR32 help Enables support for NAND Flash / Smart Media Card interface on Atmel AT91 and AVR32 processors. choice prompt "ECC management for NAND Flash / SmartMedia on AT91 / AVR32" depends on MTD_NAND_ATMEL config MTD_NAND_ATMEL_ECC_HW bool "Hardware ECC" depends on ARCH_AT91SAM9263 || ARCH_AT91SAM9260 || AVR32 help Use hardware ECC instead of software ECC when the chip supports it. The hardware ECC controller is capable of single bit error correction and 2-bit random detection per page. NB : hardware and software ECC schemes are incompatible. If you switch from one to another, you'll have to erase your mtd partition. If unsure, say Y config MTD_NAND_ATMEL_ECC_SOFT bool "Software ECC" help Use software ECC. NB : hardware and software ECC schemes are incompatible. If you switch from one to another, you'll have to erase your mtd partition. config MTD_NAND_ATMEL_ECC_NONE bool "No ECC (testing only, DANGEROUS)" depends on DEBUG_KERNEL help No ECC will be used. It's not a good idea and it should be reserved for testing purpose only. If unsure, say N endchoice endchoice config MTD_NAND_PXA3xx bool "Support for NAND flash devices on PXA3xx" depends on MTD_NAND && PXA3xx help This enables the driver for the NAND flash device found on PXA3xx processors config MTD_NAND_PXA3xx_BUILTIN bool "Use builtin definitions for some NAND chips (deprecated)" depends on MTD_NAND_PXA3xx help This enables builtin definitions for some NAND chips. This is deprecated in favor of platform specific data. config MTD_NAND_CM_X270 tristate "Support for NAND Flash on CM-X270 modules" depends on MTD_NAND && MACH_ARMCORE config MTD_NAND_PASEMI tristate "NAND support for PA Semi PWRficient" depends on MTD_NAND && PPC_PASEMI help Enables support for NAND Flash interface on PA Semi PWRficient based boards config MTD_NAND_TMIO tristate "NAND Flash device on Toshiba Mobile IO Controller" depends on MTD_NAND && MFD_TMIO help Support for NAND flash connected to a Toshiba Mobile IO Controller in some PDAs, including the Sharp SL6000x. config MTD_NAND_NANDSIM tristate "Support for NAND Flash Simulator" depends on MTD_PARTITIONS help The simulator may simulate various NAND flash chips for the MTD nand layer. config MTD_NAND_PLATFORM tristate "Support for generic platform NAND driver" depends on MTD_NAND help This implements a generic NAND driver for on-SOC platform devices. You will need to provide platform-specific functions via platform_data. config MTD_ALAUDA tristate "MTD driver for Olympus MAUSB-10 and Fujifilm DPC-R1" depends on MTD_NAND && USB help These two (and possibly other) Alauda-based cardreaders for SmartMedia and xD allow raw flash access. config MTD_NAND_ORION tristate "NAND Flash support for Marvell Orion SoC" depends on PLAT_ORION && MTD_NAND help This enables the NAND flash controller on Orion machines. No board specific support is done by this driver, each board must advertise a platform_device for the driver to attach. config MTD_NAND_FSL_ELBC tristate "NAND support for Freescale eLBC controllers" depends on MTD_NAND && PPC_OF help Various Freescale chips, including the 8313, include a NAND Flash Controller Module with built-in hardware ECC capabilities. Enabling this option will enable you to use this to control external NAND devices. config MTD_NAND_FSL_UPM tristate "Support for NAND on Freescale UPM" depends on MTD_NAND && OF_GPIO && (PPC_83xx || PPC_85xx) select FSL_LBC help Enables support for NAND Flash chips wired onto Freescale PowerPC processor localbus with User-Programmable Machine support. config MTD_NAND_MXC tristate "MXC NAND support" depends on ARCH_MX2 help This enables the driver for the NAND flash controller on the MXC processors. endif # MTD_NAND