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#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
comment "MTD Configuration"
config MTD_PARTITION
bool "Support MTD partitions"
default n
---help---
MTD partitions are build as MTD drivers that manage a sub-region
of the FLASH memory. The contain the original FLASH MTD driver and
simply manage all accesses to assure that (1) FLASH accesses are
always offset to the beginning of the partition, and (2) that FLASH
accesses do not extend outside of the partition.
A FLASH device may be broken up into several partitions managed,
each managed by a separate MTD driver. The MTD parition interface
is described in:
include/nuttx/mtd.h
FAR struct mtd_dev_s *mtd_partition(FAR struct mtd_dev_s *mtd, off_t offset, off_t nblocks);
Each call to mtd_partition() will create a new MTD driver instance
managing the sub-region of flash beginning at 'offset' (in blocks)
and of size 'nblocks' on the device specified by 'mtd'.
config MTD_BYTE_WRITE
bool "Byte write"
default n
---help---
Some devices (such as the EON EN25F80) support writing an arbitrary
number of bytes to FLASH. This setting enables MTD interfaces to
support such writes. The SMART file system can take advantage of
this option if it is enabled.
comment "MTD Device Drivers"
config RAMMTD
bool "RAM-based MTD driver"
default n
---help---
Build support for a RAM-based MTD driver.
if RAMMTD
config RAMMTD_BLOCKSIZE
int "RAM MTD block size"
default 512
config RAMMTD_ERASESIZE
int "RAM MTD erase block size"
default 4096
config RAMMTD_ERASESTATE
hex "Simulated erase state"
default 0xff
config RAMMTD_FLASHSIM
bool "RAM MTD FLASH Simulation"
default n
---help---
RAMMTD_FLASHSIM will add some extra logic to improve the level of
FLASH simulation.
config RAMMTD_SMART
bool "SMART block driver support in the RAM MTD driver"
default n
---help---
Builds in additional ioctl and interface code to support the
SMART block driver / filesystem.
endif
config MTD_AT24XX
bool "I2C-based AT24XX eeprom"
default n
select I2C
---help---
Build support for I2C-based at24cxx EEPROM(at24c32, at24c64,
at24c128, at24c256)
if MTD_AT24XX
config AT24XX_SIZE
int "at24xx size(kByte)"
default 64
config AT24XX_ADDR
hex "at24xx i2c address"
default 0x50
endif
config MTD_AT45DB
bool "SPI-based AT45DB flash"
default n
select SPI
if MTD_AT45DB
config AT45DB_FREQUENCY
int "at45db frequency"
default 1000000
config AT45DB_PREWAIT
bool "enables higher performance write logic"
default y
config AT45DB_PWRSAVE
bool "enables power save"
default n
endif
config MTD_M25P
bool "SPI-based M25P FLASH"
default n
select SPI
if MTD_M25P
config M25P_SPIMODE
int "M25P SPI mode"
default 0
config M25P_MANUFACTURER
hex "M25P manufacturers ID"
default 0x20
---help---
Various manufacturers may have produced the parts. 0x20 is the manufacturer ID
for the STMicro MP25x serial FLASH. If, for example, you are using the a Macronix
International MX25 serial FLASH, the correct manufacturer ID would be 0xc2.
config M25P_MEMORY_TYPE
hex "M25P memory type ID"
default 0x20
---help---
The memory type for M25 "P" series is 0x20, but the driver also supports "F" series
devices, such as the EON EN25F80 part which adds a 4K sector erase capability. The
ID for "F" series parts from EON is 0x31.
config M25P_SUBSECTOR_ERASE
bool "Sub-Sector Erase"
default n
---help---
Some devices (such as the EON EN25F80) support a smaller erase block
size (4K vs 64K). This option enables support for sub-sector erase.
The SMART file system can take advantage of this option if it is enabled.
config M25P_BYTEWRITE
bool "Enable ByteWrite ioctl support"
default n
---help---
The M25P series of devices allow writing to a page with less than a full-page
size of data. In this case, only the written bytes are updated without affecting
the other bytes in the page. The SMART FS requires this option for proper operation.
endif
config MTD_SMART
bool "Sector Mapped Allocation for Really Tiny (SMART) Flash support"
default y
select M25P_BYTEWRITE
---help---
The MP25x series of Flash devices are typically very small and have a very large
erase block size. This causes issues with the standard Flash Translation Layer
block driver since it tries to allocate a RAM block the size of a flash erase
block, which is typically 64K. This block driver uses a different approach
to sacrifice performance for RAM memory footprint by saving data in sectors
(typically 2K - 4K based on memory size) and relocating sectors as needed when
an erase block needs to be erased.
config MTD_SMART_SECTOR_SIZE
int "SMART Device sector size"
depends on MTD_SMART
default 1024
---help---
Sets the size of a single alloction on the SMART device. Larger sector sizes
reduce overhead per sector, but cause more wasted space with a lot of smaller
files.
config MTD_RAMTRON
bool "SPI-based RAMTRON NVRAM Devices FM25V10"
default n
select SPI
---help---
SPI-based RAMTRON NVRAM Devices FM25V10
config MTD_SST25
bool "SPI-based SST25 FLASH"
default n
select SPI
if MTD_SST25
config SST25_SPIMODE
int "SST25 SPI Mode"
default 0
config SST25_SPIFREQUENCY
int "SST25 SPI Frequency"
default 20000000
config SST25_READONLY
bool "SST25 Read-Only FLASH"
default n
config SST25_SECTOR512
bool "Simulate 512 byte Erase Blocks"
default n
config SST25_SLOWWRITE
bool
default y
config SST25_SLOWREAD
bool
default n
endif
config MTD_SST39FV
bool "SST39FV NOR FLASH"
default n
---help---
Selects 16-bit SST NOR FLASH. This includes support for:
SST39FV1601/SST39FV1602: 2Mb
SST39FV3201/SST39FV3202: 4Mb
if MTD_SST39FV
config SST39VF_BASE_ADDRESS
hex "SST39FV bass address"
default 0x00000000
---help---
This is the address where the SST29VF FLASH can be found in memory.
endif
config MTD_W25
bool "SPI-based W25 FLASH"
default n
select SPI
if MTD_W25
config W25_SPIMODE
int "W25 SPI Mode"
default 0
config W25_SPIFREQUENCY
int "W25 SPI Frequency"
default 20000000
config W25_READONLY
bool "W25 Read-Only FLASH"
default n
config W25_SECTOR512
bool "Simulate 512 byte Erase Blocks"
default n
config W25_SLOWREAD
bool
default n
endif
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