# SPDX-License-Identifier: GPL-2.0-only
menu "Self-contained MTD device drivers"
depends on MTD!=n
depends on HAS_IOMEM
config MTD_PMC551
tristate "Ramix PMC551 PCI Mezzanine RAM card support"
depends on PCI
help
This provides a MTD device driver for the Ramix PMC551 RAM PCI card
from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>.
These devices come in memory configurations from 32M - 1G. If you
have one, you probably want to enable this.
If this driver is compiled as a module you get the ability to select
the size of the aperture window pointing into the devices memory.
What this means is that if you have a 1G card, normally the kernel
will use a 1G memory map as its view of the device. As a module,
you can select a 1M window into the memory and the driver will
"slide" the window around the PMC551's memory. This was
particularly useful on the 2.2 kernels on PPC architectures as there
was limited kernel space to deal with.
config MTD_PMC551_BUGFIX
bool "PMC551 256M DRAM Bugfix"
depends on MTD_PMC551
help
Some of Ramix's PMC551 boards with 256M configurations have invalid
column and row mux values. This option will fix them, but will
break other memory configurations. If unsure say N.
config MTD_PMC551_DEBUG
bool "PMC551 Debugging"
depends on MTD_PMC551
help
This option makes the PMC551 more verbose during its operation and
is only really useful if you are developing on this driver or
suspect a possible hardware or driver bug. If unsure say N.
config MTD_MS02NV
tristate "DEC MS02-NV NVRAM module support"
depends on MACH_DECSTATION
help
This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery
backed-up NVRAM module. The module was originally meant as an NFS
accelerator. Say Y here if you have a DECstation 5000/2x0 or a
DECsystem 5900 equipped with such a module.
If you want to compile this driver as a module ( = code which can be
inserted in and removed from the running kernel whenever you want),
say M here and read <file:Documentation/kbuild/modules.rst>.
The module will be called ms02-nv.
config MTD_DATAFLASH
tristate "Support for AT45xxx DataFlash"
depends on SPI_MASTER
help
This enables access to AT45xxx DataFlash chips, using SPI.
Sometimes DataFlash chips are packaged inside MMC-format
cards; at this writing, the MMC stack won't handle those.
config MTD_DATAFLASH_WRITE_VERIFY
bool "Verify DataFlash page writes"
depends on MTD_DATAFLASH
help
This adds an extra check when data is written to the flash.
It may help if you are verifying chip setup (timings etc) on
your board. 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_DATAFLASH_OTP
bool "DataFlash OTP support (Security Register)"
depends on MTD_DATAFLASH
help
Newer DataFlash chips (revisions C and D) support 128 bytes of
one-time-programmable (OTP) data. The first half may be written
(once) with up to 64 bytes of data, such as a serial number or
other key product data. The second half is programmed with a
unique-to-each-chip bit pattern at the factory.
config MTD_MCHP23K256
tristate "Microchip 23K256 SRAM"
depends on SPI_MASTER
help
This enables access to Microchip 23K256 SRAM chips, using SPI.
Set up your spi devices with the right board-specific
platform data, or a device tree description if you want to
specify device partitioning
config MTD_MCHP48L640
tristate "Microchip 48L640 EERAM"
depends on SPI_MASTER
help
This enables access to Microchip 48L640 EERAM chips, using SPI.
config MTD_SPEAR_SMI
tristate "SPEAR MTD NOR Support through SMI controller"
depends on PLAT_SPEAR || COMPILE_TEST
default y
help
This enable SNOR support on SPEAR platforms using SMI controller
config MTD_SST25L
tristate "Support SST25L (non JEDEC) SPI Flash chips"
depends on SPI_MASTER
help
This enables access to the non JEDEC SST25L SPI flash chips, used
for program and data storage.
Set up your spi devices with the right board-specific platform data,
if you want to specify device partitioning.
config MTD_BCM47XXSFLASH
tristate "Support for serial flash on BCMA bus"
depends on BCMA_SFLASH && (MIPS || ARM)
help
BCMA bus can have various flash memories attached, they are
registered by bcma as platform devices. This enables driver for
serial flash memories.
config MTD_SLRAM
tristate "Uncached system RAM"
help
If your CPU cannot cache all of the physical memory in your machine,
you can still use it for storage or swap by using this driver to
present it to the system as a Memory Technology Device.
config MTD_PHRAM
tristate "Physical system RAM"
help
This is a re-implementation of the slram driver above.
Use this driver to access physical memory that the kernel proper
doesn't have access to, memory beyond the mem=xxx limit, nvram,
memory on the video card, etc...
config MTD_MTDRAM
tristate "Test driver using RAM"
help
This enables a test MTD device driver which uses vmalloc() to
provide storage. You probably want to say 'N' unless you're
testing stuff.
config MTDRAM_TOTAL_SIZE
int "MTDRAM device size in KiB"
depends on MTD_MTDRAM
default "4096"
help
This allows you to configure the total size of the MTD device
emulated by the MTDRAM driver. If the MTDRAM driver is built
as a module, it is also possible to specify this as a parameter when
loading the module.
config MTDRAM_ERASE_SIZE
int "MTDRAM erase block size in KiB"
depends on MTD_MTDRAM
default "128"
help
This allows you to configure the size of the erase blocks in the
device emulated by the MTDRAM driver. If the MTDRAM driver is built
as a module, it is also possible to specify this as a parameter when
loading the module.
config MTD_BLOCK2MTD
tristate "MTD using block device"
depends on BLOCK
help
This driver allows a block device to appear as an MTD. It would
generally be used in the following cases:
Using Compact Flash as an MTD, these usually present themselves to
the system as an ATA drive.
Testing MTD users (eg JFFS2) on large media and media that might
be removed during a write (using the floppy drive).
config MTD_POWERNV_FLASH
tristate "powernv flash MTD driver"
depends on PPC_POWERNV
help
This provides an MTD device to access flash on powernv OPAL
platforms from Linux. This device abstracts away the
firmware interface for flash access.
comment "Disk-On-Chip Device Drivers"
config MTD_DOCG3
tristate "M-Systems Disk-On-Chip G3"
select BCH
select BCH_CONST_PARAMS if !MTD_NAND_ECC_SW_BCH
select BITREVERSE
help
This provides an MTD device driver for the M-Systems DiskOnChip
G3 devices.
The driver provides access to G3 DiskOnChip, distributed by
M-Systems and now Sandisk. The support is very experimental,
and doesn't give access to any write operations.
config MTD_ST_SPI_FSM
tristate "ST Microelectronics SPI FSM Serial Flash Controller"
depends on ARCH_STI
help
This provides an MTD device driver for the ST Microelectronics
SPI Fast Sequence Mode (FSM) Serial Flash Controller and support
for a subset of connected Serial Flash devices.
if MTD_DOCG3
config BCH_CONST_M
default 14
config BCH_CONST_T
default 4
endif
endmenu
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