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660685d9d1
The MTD subsystem has historically tried to be as configurable as possible. The
side-effect of this is that its configuration menu is rather large, and we are
gradually shrinking it. For example, we recently merged partitions support with
the mtdcore.
This patch does the next step - it merges the mtdchar module to mtdcore. And in
this case this is not only about eliminating too fine-grained separation and
simplifying the configuration menu. This is also about eliminating seemingly
useless kernel module.
Indeed, mtdchar is a module that allows user-space making use of MTD devices
via /dev/mtd* character devices. If users do not enable it, they simply cannot
use MTD devices at all. They cannot read or write the flash contents. Is it a
sane and useful setup? I believe not. And everyone just enables mtdchar.
Having mtdchar separate is also a little bit harmful. People sometimes miss the
fact that they need to enable an additional configuration option to have
user-space MTD interfaces, and then they wonder why on earth the kernel does
not allow using the flash? They spend time asking around.
Thus, let's just get rid of this module and make it part of mtd core.
Note, mtdchar had additional configuration option to enable OTP interfaces,
which are present on some flashes. I removed that option as well - it saves a
really tiny amount space.
[dwmw2: Strictly speaking, you can mount file systems on MTD devices just
fine without the mtdchar (or mtdblock) devices; you just can't do
other manipulations directly on the underlying device. But still I
agree that it makes sense to make this unconditional. And Yay! we
get to kill off an instance of checking CONFIG_foo_MODULE, which is
an abomination that should never happen.]
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
283 lines
9.9 KiB
Plaintext
283 lines
9.9 KiB
Plaintext
menu "Self-contained MTD device drivers"
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depends on MTD!=n
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depends on HAS_IOMEM
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config MTD_PMC551
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tristate "Ramix PMC551 PCI Mezzanine RAM card support"
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depends on PCI
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---help---
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This provides a MTD device driver for the Ramix PMC551 RAM PCI card
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from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>.
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These devices come in memory configurations from 32M - 1G. If you
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have one, you probably want to enable this.
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If this driver is compiled as a module you get the ability to select
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the size of the aperture window pointing into the devices memory.
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What this means is that if you have a 1G card, normally the kernel
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will use a 1G memory map as its view of the device. As a module,
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you can select a 1M window into the memory and the driver will
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"slide" the window around the PMC551's memory. This was
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particularly useful on the 2.2 kernels on PPC architectures as there
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was limited kernel space to deal with.
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config MTD_PMC551_BUGFIX
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bool "PMC551 256M DRAM Bugfix"
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depends on MTD_PMC551
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help
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Some of Ramix's PMC551 boards with 256M configurations have invalid
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column and row mux values. This option will fix them, but will
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break other memory configurations. If unsure say N.
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config MTD_PMC551_DEBUG
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bool "PMC551 Debugging"
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depends on MTD_PMC551
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help
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This option makes the PMC551 more verbose during its operation and
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is only really useful if you are developing on this driver or
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suspect a possible hardware or driver bug. If unsure say N.
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config MTD_MS02NV
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tristate "DEC MS02-NV NVRAM module support"
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depends on MACH_DECSTATION
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help
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This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery
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backed-up NVRAM module. The module was originally meant as an NFS
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accelerator. Say Y here if you have a DECstation 5000/2x0 or a
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DECsystem 5900 equipped with such a module.
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If you want to compile this driver as a module ( = code which can be
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inserted in and removed from the running kernel whenever you want),
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say M here and read <file:Documentation/kbuild/modules.txt>.
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The module will be called ms02-nv.
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config MTD_DATAFLASH
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tristate "Support for AT45xxx DataFlash"
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depends on SPI_MASTER
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help
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This enables access to AT45xxx DataFlash chips, using SPI.
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Sometimes DataFlash chips are packaged inside MMC-format
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cards; at this writing, the MMC stack won't handle those.
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config MTD_DATAFLASH_WRITE_VERIFY
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bool "Verify DataFlash page writes"
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depends on MTD_DATAFLASH
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help
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This adds an extra check when data is written to the flash.
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It may help if you are verifying chip setup (timings etc) on
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your board. 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_DATAFLASH_OTP
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bool "DataFlash OTP support (Security Register)"
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depends on MTD_DATAFLASH
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help
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Newer DataFlash chips (revisions C and D) support 128 bytes of
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one-time-programmable (OTP) data. The first half may be written
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(once) with up to 64 bytes of data, such as a serial number or
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other key product data. The second half is programmed with a
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unique-to-each-chip bit pattern at the factory.
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config MTD_M25P80
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tristate "Support most SPI Flash chips (AT26DF, M25P, W25X, ...)"
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depends on SPI_MASTER
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help
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This enables access to most modern SPI flash chips, used for
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program and data storage. Series supported include Atmel AT26DF,
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Spansion S25SL, SST 25VF, ST M25P, and Winbond W25X. Other chips
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are supported as well. See the driver source for the current list,
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or to add other chips.
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Note that the original DataFlash chips (AT45 series, not AT26DF),
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need an entirely different driver.
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Set up your spi devices with the right board-specific platform data,
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if you want to specify device partitioning or to use a device which
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doesn't support the JEDEC ID instruction.
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config M25PXX_USE_FAST_READ
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bool "Use FAST_READ OPCode allowing SPI CLK >= 50MHz"
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depends on MTD_M25P80
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default y
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help
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This option enables FAST_READ access supported by ST M25Pxx.
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config MTD_SPEAR_SMI
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tristate "SPEAR MTD NOR Support through SMI controller"
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depends on PLAT_SPEAR
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default y
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help
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This enable SNOR support on SPEAR platforms using SMI controller
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config MTD_SST25L
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tristate "Support SST25L (non JEDEC) SPI Flash chips"
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depends on SPI_MASTER
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help
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This enables access to the non JEDEC SST25L SPI flash chips, used
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for program and data storage.
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Set up your spi devices with the right board-specific platform data,
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if you want to specify device partitioning.
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config MTD_BCM47XXSFLASH
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tristate "R/O support for serial flash on BCMA bus"
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depends on BCMA_SFLASH
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help
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BCMA bus can have various flash memories attached, they are
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registered by bcma as platform devices. This enables driver for
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serial flash memories (only read-only mode is implemented).
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config MTD_SLRAM
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tristate "Uncached system RAM"
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help
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If your CPU cannot cache all of the physical memory in your machine,
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you can still use it for storage or swap by using this driver to
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present it to the system as a Memory Technology Device.
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config MTD_PHRAM
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tristate "Physical system RAM"
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help
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This is a re-implementation of the slram driver above.
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Use this driver to access physical memory that the kernel proper
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doesn't have access to, memory beyond the mem=xxx limit, nvram,
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memory on the video card, etc...
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config MTD_LART
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tristate "28F160xx flash driver for LART"
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depends on SA1100_LART
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help
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This enables the flash driver for LART. Please note that you do
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not need any mapping/chip driver for LART. This one does it all
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for you, so go disable all of those if you enabled some of them (:
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config MTD_MTDRAM
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tristate "Test driver using RAM"
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help
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This enables a test MTD device driver which uses vmalloc() to
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provide storage. You probably want to say 'N' unless you're
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testing stuff.
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config MTDRAM_TOTAL_SIZE
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int "MTDRAM device size in KiB"
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depends on MTD_MTDRAM
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default "4096"
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help
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This allows you to configure the total size of the MTD device
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emulated by the MTDRAM driver. If the MTDRAM driver is built
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as a module, it is also possible to specify this as a parameter when
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loading the module.
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config MTDRAM_ERASE_SIZE
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int "MTDRAM erase block size in KiB"
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depends on MTD_MTDRAM
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default "128"
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help
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This allows you to configure the size of the erase blocks in the
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device emulated by the MTDRAM driver. If the MTDRAM driver is built
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as a module, it is also possible to specify this as a parameter when
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loading the module.
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#If not a module (I don't want to test it as a module)
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config MTDRAM_ABS_POS
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hex "SRAM Hexadecimal Absolute position or 0"
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depends on MTD_MTDRAM=y
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default "0"
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help
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If you have system RAM accessible by the CPU but not used by Linux
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in normal operation, you can give the physical address at which the
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available RAM starts, and the MTDRAM driver will use it instead of
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allocating space from Linux's available memory. Otherwise, leave
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this set to zero. Most people will want to leave this as zero.
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config MTD_BLOCK2MTD
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tristate "MTD using block device"
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depends on BLOCK
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help
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This driver allows a block device to appear as an MTD. It would
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generally be used in the following cases:
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Using Compact Flash as an MTD, these usually present themselves to
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the system as an ATA drive.
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Testing MTD users (eg JFFS2) on large media and media that might
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be removed during a write (using the floppy drive).
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comment "Disk-On-Chip Device Drivers"
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config MTD_DOCG3
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tristate "M-Systems Disk-On-Chip G3"
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select BCH
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select BCH_CONST_PARAMS
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select BITREVERSE
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---help---
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This provides an MTD device driver for the M-Systems DiskOnChip
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G3 devices.
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The driver provides access to G3 DiskOnChip, distributed by
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M-Systems and now Sandisk. The support is very experimental,
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and doesn't give access to any write operations.
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if MTD_DOCG3
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config BCH_CONST_M
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default 14
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config BCH_CONST_T
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default 4
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endif
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config MTD_DOCPROBE
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tristate
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select MTD_DOCECC
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config MTD_DOCECC
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tristate
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config MTD_DOCPROBE_ADVANCED
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bool "Advanced detection options for DiskOnChip"
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depends on MTD_DOCPROBE
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help
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This option allows you to specify nonstandard address at which to
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probe for a DiskOnChip, or to change the detection options. You
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are unlikely to need any of this unless you are using LinuxBIOS.
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Say 'N'.
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config MTD_DOCPROBE_ADDRESS
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hex "Physical address of DiskOnChip" if MTD_DOCPROBE_ADVANCED
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depends on MTD_DOCPROBE
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default "0x0"
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---help---
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By default, the probe for DiskOnChip devices will look for a
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DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000.
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This option allows you to specify a single address at which to probe
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for the device, which is useful if you have other devices in that
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range which get upset when they are probed.
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(Note that on PowerPC, the normal probe will only check at
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0xE4000000.)
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Normally, you should leave this set to zero, to allow the probe at
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the normal addresses.
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config MTD_DOCPROBE_HIGH
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bool "Probe high addresses"
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depends on MTD_DOCPROBE_ADVANCED
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help
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By default, the probe for DiskOnChip devices will look for a
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DiskOnChip at every multiple of 0x2000 between 0xC8000 and 0xEE000.
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This option changes to make it probe between 0xFFFC8000 and
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0xFFFEE000. Unless you are using LinuxBIOS, this is unlikely to be
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useful to you. Say 'N'.
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config MTD_DOCPROBE_55AA
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bool "Probe for 0x55 0xAA BIOS Extension Signature"
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depends on MTD_DOCPROBE_ADVANCED
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help
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Check for the 0x55 0xAA signature of a DiskOnChip, and do not
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continue with probing if it is absent. The signature will always be
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present for a DiskOnChip 2000 or a normal DiskOnChip Millennium.
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Only if you have overwritten the first block of a DiskOnChip
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Millennium will it be absent. Enable this option if you are using
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LinuxBIOS or if you need to recover a DiskOnChip Millennium on which
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you have managed to wipe the first block.
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endmenu
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