menuconfig [31mCONFIG_MTD[0m
tristate "Memory Technology Device (MTD) support"
depends on [31mCONFIG_GENERIC_IO[0m
help
Memory Technology Devices are flash, RAM and similar chips, often
used for solid state file systems on embedded devices. This option
will provide the generic support for [31mCONFIG_MTD[0m drivers to register
themselves with the kernel and for potential users of [31mCONFIG_MTD[0m devices
to enumerate the devices which are present and obtain a handle on
them. It will also allow you to select individual drivers for
particular hardware and users of [31mCONFIG_MTD[0m devices. If unsure, say N.
if [31mCONFIG_MTD[0m
config [31mCONFIG_MTD_TESTS[0m
tristate "MTD tests support (DANGEROUS)"
depends on m
help
This option includes various [31mCONFIG_MTD[0m tests into compilation. The tests
should normally be compiled as kernel modules. The modules perform
various checks and verifications when loaded.
WARNING: some of the tests will ERASE entire [31mCONFIG_MTD[0m device which they
test. Do not use these tests unless you really know what you do.
config [31mCONFIG_MTD_REDBOOT_PARTS[0m
tristate "RedBoot partition table parsing"
---help---
RedBoot is a [31mCONFIG_ROM[0m monitor and bootloader which deals with multiple
'images' in flash devices by putting a table one of the erase
blocks on the device, similar to a partition table, which gives
the offsets, lengths and names of all the images stored in the
flash.
If you need code which can detect and parse this table, and register
[31mCONFIG_MTD[0m 'partitions' corresponding to each image in the table, enable
this option.
You will still need the parsing functions to be called by the driver
for your particular device. It won't happen automatically. The
SA1100 map driver (CONFIG_MTD_SA1100) has an option for this, for
example.
if [31mCONFIG_MTD_REDBOOT_PARTS[0m
config [31mCONFIG_MTD_REDBOOT_DIRECTORY_BLOCK[0m
int "Location of RedBoot partition table"
default "-1"
---help---
This option is the Linux counterpart to the
CYGNUM_REDBOOT_FIS_DIRECTORY_BLOCK RedBoot compile time
option.
The option specifies which Flash sectors holds the RedBoot
partition table. [31mCONFIG_A[0m zero or positive value gives an absolute
erase block number. [31mCONFIG_A[0m negative value specifies a number of
sectors before the end of the device.
For example "2" means block number 2, "-1" means the last
block and "-2" means the penultimate block.
config [31mCONFIG_MTD_REDBOOT_PARTS_UNALLOCATED[0m
bool "Include unallocated flash regions"
help
If you need to register each unallocated flash region as a [31mCONFIG_MTD[0m
'partition', enable this option.
config [31mCONFIG_MTD_REDBOOT_PARTS_READONLY[0m
bool "Force read-only for RedBoot system images"
help
If you need to force read-only for 'RedBoot', 'RedBoot Config' and
'FIS directory' images, enable this option.
endif # [31mCONFIG_MTD_REDBOOT_PARTS[0m
config [31mCONFIG_MTD_CMDLINE_PARTS[0m
tristate "Command line partition table parsing"
depends on [31mCONFIG_MTD[0m
---help---
Allow generic configuration of the [31mCONFIG_MTD[0m partition tables via the kernel
command line. Multiple flash resources are supported for hardware where
different kinds of flash memory are available.
You will still need the parsing functions to be called by the driver
for your particular device. It won't happen automatically. The
SA1100 map driver (CONFIG_MTD_SA1100) has an option for this, for
example.
The format for the command line is as follows:
mtdparts=<mtddef>[;<mtddef]
<mtddef> := <mtd-id>:<partdef>[,<partdef>]
<partdef> := <size>[@offset][<name>][ro]
<mtd-id> := unique id used in mapping driver/device
<size> := standard linux memsize OR "-" to denote all
remaining space
<name> := (NAME)
Due to the way Linux handles the command line, no spaces are
allowed in the partition definition, including mtd id's and partition
names.
Examples:
1 flash resource (mtd-id "sa1100"), with 1 single writable partition:
mtdparts=sa1100:-
Same flash, but 2 named partitions, the first one being read-only:
mtdparts=sa1100:256k(ARMboot)ro,-(root)
If unsure, say 'N'.
config [31mCONFIG_MTD_AFS_PARTS[0m
tristate "ARM Firmware Suite partition parsing"
depends on ([31mCONFIG_ARM[0m || [31mCONFIG_ARM64[0m)
---help---
The [31mCONFIG_ARM[0m Firmware Suite allows the user to divide flash devices into
multiple 'images'. Each such image has a header containing its name
and offset/size etc.
If you need code which can detect and parse these tables, and
register [31mCONFIG_MTD[0m 'partitions' corresponding to each image detected,
enable this option.
You will still need the parsing functions to be called by the driver
for your particular device. It won't happen automatically. The
'physmap' map driver (CONFIG_MTD_PHYSMAP) does this, for example.
config [31mCONFIG_MTD_OF_PARTS[0m
tristate "OpenFirmware partitioning information support"
default y
depends on [31mCONFIG_OF[0m
help
This provides a partition parsing function which derives
the partition map from the children of the flash node,
as described in Documentation/devicetree/bindings/mtd/partition.txt.
config [31mCONFIG_MTD_AR7_PARTS[0m
tristate "TI AR7 partitioning support"
---help---
TI [31mCONFIG_AR7[0m partitioning support
config [31mCONFIG_MTD_BCM63XX_PARTS[0m
tristate "BCM63XX CFE partitioning support"
depends on [31mCONFIG_BCM63XX[0m || [31mCONFIG_BMIPS_GENERIC[0m || [31mCONFIG_COMPILE_TEST[0m
select [31mCONFIG_CRC32[0m
help
This provides partions parsing for BCM63xx devices with CFE
bootloaders.
config [31mCONFIG_MTD_BCM47XX_PARTS[0m
tristate "BCM47XX partitioning support"
depends on [31mCONFIG_BCM47XX[0m || [31mCONFIG_ARCH_BCM_5301X[0m
help
This provides partitions parser for devices based on BCM47xx
boards.
comment "User Modules And Translation Layers"
#
# [31mCONFIG_MTD[0m block device support is select'ed if needed
#
config [31mCONFIG_MTD_BLKDEVS[0m
tristate
config [31mCONFIG_MTD_BLOCK[0m
tristate "Caching block device access to MTD devices"
depends on [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
---help---
Although most flash chips have an erase size too large to be useful
as block devices, it is possible to use [31mCONFIG_MTD[0m devices which are based
on RAM chips in this manner. This block device is a user of [31mCONFIG_MTD[0m
devices performing that function.
At the moment, it is also required for the Journalling Flash File
System(s) to obtain a handle on the [31mCONFIG_MTD[0m device when it's mounted
(although JFFS and JFFS2 don't actually use any of the functionality
of the mtdblock device).
Later, it may be extended to perform read/erase/modify/write cycles
on flash chips to emulate a smaller block size. Needless to say,
this is very unsafe, but could be useful for file systems which are
almost never written to.
You do not need this option for use with the DiskOnChip devices. For
those, enable [31mCONFIG_NFTL[0m support (CONFIG_NFTL) instead.
config [31mCONFIG_MTD_BLOCK_RO[0m
tristate "Readonly block device access to MTD devices"
depends on [31mCONFIG_MTD_BLOCK[0m!=y && [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
help
This allows you to mount read-only file systems (such as cramfs)
from an [31mCONFIG_MTD[0m device, without the overhead (and danger) of the caching
driver.
You do not need this option for use with the DiskOnChip devices. For
those, enable [31mCONFIG_NFTL[0m support (CONFIG_NFTL) instead.
config [31mCONFIG_FTL[0m
tristate "FTL (Flash Translation Layer) support"
depends on [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
---help---
This provides support for the original Flash Translation Layer which
is part of the [31mCONFIG_PCMCIA[0m specification. It uses a kind of pseudo-
file system on a flash device to emulate a block device with
512-byte sectors, on top of which you put a 'normal' file system.
You may find that the algorithms used in this code are patented
unless you live in the Free World where software patents aren't
legal - in the USA you are only permitted to use this on [31mCONFIG_PCMCIA[0m
hardware, although under the terms of the GPL you're obviously
permitted to copy, modify and distribute the code as you wish. Just
not use it.
config [31mCONFIG_NFTL[0m
tristate "NFTL (NAND Flash Translation Layer) support"
depends on [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
---help---
This provides support for the NAND Flash Translation Layer which is
used on [31mCONFIG_M[0m-Systems' DiskOnChip devices. It uses a kind of pseudo-
file system on a flash device to emulate a block device with
512-byte sectors, on top of which you put a 'normal' file system.
You may find that the algorithms used in this code are patented
unless you live in the Free World where software patents aren't
legal - in the USA you are only permitted to use this on DiskOnChip
hardware, although under the terms of the GPL you're obviously
permitted to copy, modify and distribute the code as you wish. Just
not use it.
config [31mCONFIG_NFTL_RW[0m
bool "Write support for NFTL"
depends on [31mCONFIG_NFTL[0m
help
Support for writing to the NAND Flash Translation Layer, as used
on the DiskOnChip.
config [31mCONFIG_INFTL[0m
tristate "INFTL (Inverse NAND Flash Translation Layer) support"
depends on [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
---help---
This provides support for the Inverse NAND Flash Translation
Layer which is used on [31mCONFIG_M[0m-Systems' newer DiskOnChip devices. It
uses a kind of pseudo-file system on a flash device to emulate
a block device with 512-byte sectors, on top of which you put
a 'normal' file system.
You may find that the algorithms used in this code are patented
unless you live in the Free World where software patents aren't
legal - in the USA you are only permitted to use this on DiskOnChip
hardware, although under the terms of the GPL you're obviously
permitted to copy, modify and distribute the code as you wish. Just
not use it.
config [31mCONFIG_RFD_FTL[0m
tristate "Resident Flash Disk (Flash Translation Layer) support"
depends on [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
---help---
This provides support for the flash translation layer known
as the Resident Flash Disk (RFD), as used by the Embedded BIOS
of General Software. There is a blurb at:
http://www.gensw.com/pages/prod/bios/rfd.htm
config [31mCONFIG_SSFDC[0m
tristate "NAND SSFDC (SmartMedia) read only translation layer"
depends on [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
help
This enables read only access to SmartMedia formatted NAND
flash. You can mount it with FAT file system.
config [31mCONFIG_SM_FTL[0m
tristate "SmartMedia/xD new translation layer"
depends on [31mCONFIG_BLOCK[0m
select [31mCONFIG_MTD_BLKDEVS[0m
select [31mCONFIG_MTD_NAND_ECC[0m
help
This enables EXPERIMENTAL R/W support for SmartMedia/xD
[31mCONFIG_FTL[0m (Flash translation layer).
Write support is only lightly tested, therefore this driver
isn't recommended to use with valuable data (anyway if you have
valuable data, do backups regardless of software/hardware you
use, because you never know what will eat your data...)
If you only need R/O access, you can use older R/O driver
(CONFIG_SSFDC)
config [31mCONFIG_MTD_OOPS[0m
tristate "Log panic/oops to an MTD buffer"
help
This enables panic and oops messages to be logged to a circular
buffer in a flash partition where it can be read back at some
later point.
config [31mCONFIG_MTD_SWAP[0m
tristate "Swap on MTD device support"
depends on [31mCONFIG_MTD[0m && [31mCONFIG_SWAP[0m
select [31mCONFIG_MTD_BLKDEVS[0m
help
Provides volatile block device driver on top of mtd partition
suitable for swapping. The mapping of written blocks is not saved.
The driver provides wear leveling by storing erase counter into the
OOB.
config [31mCONFIG_MTD_PARTITIONED_MASTER[0m
bool "Retain master device when partitioned"
default n
depends on [31mCONFIG_MTD[0m
help
For historical reasons, by default, either a master is present or
several partitions are present, but not both. The concern was that
data listed in multiple partitions was dangerous; however, [31mCONFIG_SCSI[0m does
this and it is frequently useful for applications. This config option
leaves the master in even if the device is partitioned. It also makes
the parent of the partition device be the master device, rather than
what lies behind the master.
source "drivers/mtd/chips/Kconfig"
source "drivers/mtd/maps/Kconfig"
source "drivers/mtd/devices/Kconfig"
source "drivers/mtd/nand/Kconfig"
source "drivers/mtd/onenand/Kconfig"
source "drivers/mtd/lpddr/Kconfig"
source "drivers/mtd/spi-nor/Kconfig"
source "drivers/mtd/ubi/Kconfig"
endif # [31mCONFIG_MTD[0m