2 tristate "Memory Technology Device (MTD) support"
5 Memory Technology Devices are flash, RAM and similar chips, often
6 used for solid state file systems on embedded devices. This option
7 will provide the generic support for MTD drivers to register
8 themselves with the kernel and for potential users of MTD devices
9 to enumerate the devices which are present and obtain a handle on
10 them. It will also allow you to select individual drivers for
11 particular hardware and users of MTD devices. If unsure, say N.
16 tristate "MTD tests support (DANGEROUS)"
19 This option includes various MTD tests into compilation. The tests
20 should normally be compiled as kernel modules. The modules perform
21 various checks and verifications when loaded.
23 WARNING: some of the tests will ERASE entire MTD device which they
24 test. Do not use these tests unless you really know what you do.
26 menu "Partition parsers"
27 source "drivers/mtd/parsers/Kconfig"
30 comment "User Modules And Translation Layers"
33 # MTD block device support is select'ed if needed
39 tristate "Caching block device access to MTD devices"
43 Although most flash chips have an erase size too large to be useful
44 as block devices, it is possible to use MTD devices which are based
45 on RAM chips in this manner. This block device is a user of MTD
46 devices performing that function.
48 Note that mounting a JFFS2 filesystem doesn't require using mtdblock.
49 It's possible to mount a rootfs using the MTD device on the "root="
50 bootargs as "root=mtd2" or "root=mtd:name_of_device".
52 Later, it may be extended to perform read/erase/modify/write cycles
53 on flash chips to emulate a smaller block size. Needless to say,
54 this is very unsafe, but could be useful for file systems which are
55 almost never written to.
57 You do not need this option for use with the DiskOnChip devices. For
58 those, enable NFTL support (CONFIG_NFTL) instead.
61 tristate "Readonly block device access to MTD devices"
62 depends on MTD_BLOCK!=y && BLOCK
65 This allows you to mount read-only file systems (such as cramfs)
66 from an MTD device, without the overhead (and danger) of the caching
69 You do not need this option for use with the DiskOnChip devices. For
70 those, enable NFTL support (CONFIG_NFTL) instead.
72 comment "Note that in some cases UBI block is preferred. See MTD_UBI_BLOCK."
73 depends on MTD_BLOCK || MTD_BLOCK_RO
76 tristate "FTL (Flash Translation Layer) support"
80 This provides support for the original Flash Translation Layer which
81 is part of the PCMCIA specification. It uses a kind of pseudo-
82 file system on a flash device to emulate a block device with
83 512-byte sectors, on top of which you put a 'normal' file system.
85 You may find that the algorithms used in this code are patented
86 unless you live in the Free World where software patents aren't
87 legal - in the USA you are only permitted to use this on PCMCIA
88 hardware, although under the terms of the GPL you're obviously
89 permitted to copy, modify and distribute the code as you wish. Just
93 tristate "NFTL (NAND Flash Translation Layer) support"
97 This provides support for the NAND Flash Translation Layer which is
98 used on M-Systems' DiskOnChip devices. It uses a kind of pseudo-
99 file system on a flash device to emulate a block device with
100 512-byte sectors, on top of which you put a 'normal' file system.
102 You may find that the algorithms used in this code are patented
103 unless you live in the Free World where software patents aren't
104 legal - in the USA you are only permitted to use this on DiskOnChip
105 hardware, although under the terms of the GPL you're obviously
106 permitted to copy, modify and distribute the code as you wish. Just
110 bool "Write support for NFTL"
113 Support for writing to the NAND Flash Translation Layer, as used
117 tristate "INFTL (Inverse NAND Flash Translation Layer) support"
121 This provides support for the Inverse NAND Flash Translation
122 Layer which is used on M-Systems' newer DiskOnChip devices. It
123 uses a kind of pseudo-file system on a flash device to emulate
124 a block device with 512-byte sectors, on top of which you put
125 a 'normal' file system.
127 You may find that the algorithms used in this code are patented
128 unless you live in the Free World where software patents aren't
129 legal - in the USA you are only permitted to use this on DiskOnChip
130 hardware, although under the terms of the GPL you're obviously
131 permitted to copy, modify and distribute the code as you wish. Just
135 tristate "Resident Flash Disk (Flash Translation Layer) support"
139 This provides support for the flash translation layer known
140 as the Resident Flash Disk (RFD), as used by the Embedded BIOS
141 of General Software. There is a blurb at:
143 http://www.gensw.com/pages/prod/bios/rfd.htm
146 tristate "NAND SSFDC (SmartMedia) read only translation layer"
150 This enables read only access to SmartMedia formatted NAND
151 flash. You can mount it with FAT file system.
154 tristate "SmartMedia/xD new translation layer"
158 select MTD_NAND_ECC_SW_HAMMING
160 This enables EXPERIMENTAL R/W support for SmartMedia/xD
161 FTL (Flash translation layer).
162 Write support is only lightly tested, therefore this driver
163 isn't recommended to use with valuable data (anyway if you have
164 valuable data, do backups regardless of software/hardware you
165 use, because you never know what will eat your data...)
166 If you only need R/O access, you can use older R/O driver
170 tristate "Log panic/oops to an MTD buffer"
172 This enables panic and oops messages to be logged to a circular
173 buffer in a flash partition where it can be read back at some
177 tristate "Log panic/oops to an MTD buffer based on pstore"
178 depends on PSTORE_BLK
180 This enables panic and oops messages to be logged to a circular
181 buffer in a flash partition where it can be read back as files after
182 mounting pstore filesystem.
187 tristate "Swap on MTD device support"
188 depends on MTD && SWAP
191 Provides volatile block device driver on top of mtd partition
192 suitable for swapping. The mapping of written blocks is not saved.
193 The driver provides wear leveling by storing erase counter into the
196 config MTD_PARTITIONED_MASTER
197 bool "Retain master device when partitioned"
201 For historical reasons, by default, either a master is present or
202 several partitions are present, but not both. The concern was that
203 data listed in multiple partitions was dangerous; however, SCSI does
204 this and it is frequently useful for applications. This config option
205 leaves the master in even if the device is partitioned. It also makes
206 the parent of the partition device be the master device, rather than
207 what lies behind the master.
209 source "drivers/mtd/chips/Kconfig"
211 source "drivers/mtd/maps/Kconfig"
213 source "drivers/mtd/devices/Kconfig"
215 source "drivers/mtd/nand/Kconfig"
217 source "drivers/mtd/lpddr/Kconfig"
219 source "drivers/mtd/spi-nor/Kconfig"
221 source "drivers/mtd/ubi/Kconfig"
223 source "drivers/mtd/hyperbus/Kconfig"