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 At the moment, it is also required for the Journalling Flash File
49 System(s) to obtain a handle on the MTD device when it's mounted
50 (although JFFS and JFFS2 don't actually use any of the functionality
51 of the mtdblock device).
53 Later, it may be extended to perform read/erase/modify/write cycles
54 on flash chips to emulate a smaller block size. Needless to say,
55 this is very unsafe, but could be useful for file systems which are
56 almost never written to.
58 You do not need this option for use with the DiskOnChip devices. For
59 those, enable NFTL support (CONFIG_NFTL) instead.
62 tristate "Readonly block device access to MTD devices"
63 depends on MTD_BLOCK!=y && BLOCK
66 This allows you to mount read-only file systems (such as cramfs)
67 from an MTD device, without the overhead (and danger) of the caching
70 You do not need this option for use with the DiskOnChip devices. For
71 those, enable NFTL support (CONFIG_NFTL) instead.
74 tristate "FTL (Flash Translation Layer) support"
78 This provides support for the original Flash Translation Layer which
79 is part of the PCMCIA specification. It uses a kind of pseudo-
80 file system on a flash device to emulate a block device with
81 512-byte sectors, on top of which you put a 'normal' file system.
83 You may find that the algorithms used in this code are patented
84 unless you live in the Free World where software patents aren't
85 legal - in the USA you are only permitted to use this on PCMCIA
86 hardware, although under the terms of the GPL you're obviously
87 permitted to copy, modify and distribute the code as you wish. Just
91 tristate "NFTL (NAND Flash Translation Layer) support"
95 This provides support for the NAND Flash Translation Layer which is
96 used on M-Systems' DiskOnChip devices. It uses a kind of pseudo-
97 file system on a flash device to emulate a block device with
98 512-byte sectors, on top of which you put a 'normal' file system.
100 You may find that the algorithms used in this code are patented
101 unless you live in the Free World where software patents aren't
102 legal - in the USA you are only permitted to use this on DiskOnChip
103 hardware, although under the terms of the GPL you're obviously
104 permitted to copy, modify and distribute the code as you wish. Just
108 bool "Write support for NFTL"
111 Support for writing to the NAND Flash Translation Layer, as used
115 tristate "INFTL (Inverse NAND Flash Translation Layer) support"
119 This provides support for the Inverse NAND Flash Translation
120 Layer which is used on M-Systems' newer DiskOnChip devices. It
121 uses a kind of pseudo-file system on a flash device to emulate
122 a block device with 512-byte sectors, on top of which you put
123 a 'normal' file system.
125 You may find that the algorithms used in this code are patented
126 unless you live in the Free World where software patents aren't
127 legal - in the USA you are only permitted to use this on DiskOnChip
128 hardware, although under the terms of the GPL you're obviously
129 permitted to copy, modify and distribute the code as you wish. Just
133 tristate "Resident Flash Disk (Flash Translation Layer) support"
137 This provides support for the flash translation layer known
138 as the Resident Flash Disk (RFD), as used by the Embedded BIOS
139 of General Software. There is a blurb at:
141 http://www.gensw.com/pages/prod/bios/rfd.htm
144 tristate "NAND SSFDC (SmartMedia) read only translation layer"
148 This enables read only access to SmartMedia formatted NAND
149 flash. You can mount it with FAT file system.
152 tristate "SmartMedia/xD new translation layer"
156 select MTD_NAND_ECC_SW_HAMMING
158 This enables EXPERIMENTAL R/W support for SmartMedia/xD
159 FTL (Flash translation layer).
160 Write support is only lightly tested, therefore this driver
161 isn't recommended to use with valuable data (anyway if you have
162 valuable data, do backups regardless of software/hardware you
163 use, because you never know what will eat your data...)
164 If you only need R/O access, you can use older R/O driver
168 tristate "Log panic/oops to an MTD buffer"
170 This enables panic and oops messages to be logged to a circular
171 buffer in a flash partition where it can be read back at some
175 tristate "Log panic/oops to an MTD buffer based on pstore"
176 depends on PSTORE_BLK
178 This enables panic and oops messages to be logged to a circular
179 buffer in a flash partition where it can be read back as files after
180 mounting pstore filesystem.
185 tristate "Swap on MTD device support"
186 depends on MTD && SWAP
189 Provides volatile block device driver on top of mtd partition
190 suitable for swapping. The mapping of written blocks is not saved.
191 The driver provides wear leveling by storing erase counter into the
194 config MTD_PARTITIONED_MASTER
195 bool "Retain master device when partitioned"
199 For historical reasons, by default, either a master is present or
200 several partitions are present, but not both. The concern was that
201 data listed in multiple partitions was dangerous; however, SCSI does
202 this and it is frequently useful for applications. This config option
203 leaves the master in even if the device is partitioned. It also makes
204 the parent of the partition device be the master device, rather than
205 what lies behind the master.
207 source "drivers/mtd/chips/Kconfig"
209 source "drivers/mtd/maps/Kconfig"
211 source "drivers/mtd/devices/Kconfig"
213 source "drivers/mtd/nand/Kconfig"
215 source "drivers/mtd/lpddr/Kconfig"
217 source "drivers/mtd/spi-nor/Kconfig"
219 source "drivers/mtd/ubi/Kconfig"
221 source "drivers/mtd/hyperbus/Kconfig"