# # For a description of the syntax of this configuration file, # see the file kconfig-language.txt in the NuttX tools repository. # menuconfig MTD bool "Memory Technology Device (MTD) Support" default n ---help--- Memory Technology Device (MTD) drivers. Some simple drivers for memory technologies like FLASH, EEPROM, NVRAM, etc. See include/nuttx/mtd/mtd.h (Note: This is a simple memory interface and should not be confused with the "real" MTD developed at infradead.org. This logic is unrelated; I just used the name MTD because I am not aware of any other common way to refer to this class of devices). if MTD 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 partition interface is described in: include/nuttx/mtd/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 FTL_WRITEBUFFER bool "Enable write buffering in the FTL layer" default n depends on DRVR_WRITEBUFFER config FTL_READAHEAD bool "Enable read-ahead buffering in the FTL layer" default n depends on DRVR_READAHEAD config MTD_SECT512 bool "512B sector conversion" default n ---help--- If enabled, a MTD driver will be created that will convert the sector size of any other MTD driver to a 512 byte "apparent" sector size. The managed MTD driver in this case must have an erase block size that is greater than 512B and an even multiple of 512B. if MTD_SECT512 config MTD_SECT512_ERASED_STATE hex "Erased state of the FLASH" default 0xff config MTD_SECT512_READONLY bool "512B read-only" default n endif # MTD_SECT512 config MTD_PARTITION_NAMES bool "Support MTD partition naming" depends on FS_PROCFS depends on MTD_PARTITION default n ---help--- MTD partitions can be assigned a name for reporting via the procfs file system interface. This adds an API which must be called to specify the partition name. 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. config MTD_WRBUFFER bool "Enable MTD write buffering" default n depends on DRVR_WRITEBUFFER select DRVR_INVALIDATE select DRVR_READBYTES ---help--- Build the mtd_rwbuffer layer and enable support for write buffering. if MTD_WRBUFFER config MTD_NWRBLOCKS int "MTD write buffer size" default 4 ---help--- The size of the MTD write buffer (in blocks) endif # MTD_WRBUFFER config MTD_READAHEAD bool "Enable MTD read-ahead buffering" default n depends on DRVR_READAHEAD select DRVR_INVALIDATE select DRVR_READBYTES ---help--- Build the mtd_rwbuffer layer and enable support for read-ahead buffering. if MTD_READAHEAD config MTD_NRDBLOCKS int "MTD read-head buffer size" default 4 ---help--- The size of the MTD read-ahead buffer (in blocks) endif # MTD_READAHEAD config MTD_PROGMEM bool "Enable on-chip program FLASH MTD device" default n depends on ARCH_HAVE_PROGMEM ---help--- Enable to support an MTD device that supports the on-chip FLASH using the interfaces defined in include/nuttx/progmem. Those interfaces must be exported by chip-specific logic. if MTD_PROGMEM endif #MTD_PROGMEM config MTD_CONFIG bool "Enable Dev Config (MTD based) device" default n ---help--- Provides a /dev/config device for saving / restoring application configuration data to a standard MTD device or partition. if MTD_CONFIG config MTD_CONFIG_RAM_CONSOLIDATE bool "Always use RAM consolidation method (work in progress)" default n ---help--- When the MTD device used for /dev/config contains more than one erase block, the "unused entry" consolidation reserves one erase block by default for cleanup purposes. This consumes the minimum amount of RAM, however it "wastes" one erase block on the device. (For configurations that have only a single erase block assigned to the config device, RAM consolidation is the ONLY option.) Another approach is to allow the driver to use the entire MTD device (or partition) to save config data, and then allocate a RAM buffer (the size of one erase block) to perform the consolidation. Enabling this feature basically trades off RAM usage for FLASH usage. If the MTD device used for config data has small erase sizes (4K, etc.) and there is plenty of free RAM available, then this is probably a good option. Another benefit of this option is it reduces code space a bit since the "reserved block" consolidate routine is not needed. config MTD_CONFIG_NAMED bool "Use item NAMES instead of ID/enumeration in Dev Config device" default n ---help--- Changes config item identification from ID/INST to NAMED values. config MTD_CONFIG_NAME_LEN int "Dev Config item max name length" default NAME_MAX depends on MTD_CONFIG_NAMED ---help--- Sets the maximum length of config item names. config MTD_CONFIG_FAIL_SAFE bool "Enable Fail Safe MTD Config" default n depends on MTD_BYTE_WRITE ---help--- Enable the new storage layout to support the resilient to power loss. This replaces the drivers/mtd/mtd_config, which is resilient to power loss. config MTD_WRITE_ALIGN_SIZE int "align size [1,2,4,8,16] for per write operation" default 1 depends on MTD_CONFIG_FAIL_SAFE ---help--- align size will be one of 1,2,4,8,16 config MTD_BLOCKSIZE_MULTIPLE int "Set NVS blocksize multiple" default 1 depends on MTD_CONFIG_FAIL_SAFE ---help--- The size of a multiple of blocksize compared to erasize endif # MTD_CONFIG comment "MTD Device Drivers" menuconfig MTD_NAND bool "MTD NAND support" depends on ALLOW_BSD_COMPONENTS default n ---help--- Enable support for NAND FLASH devices. if MTD_NAND config MTD_NAND_MAXNUMBLOCKS int "Max blocks" default 1024 ---help--- Maximum number of blocks in a device config MTD_NAND_MAXNUMPAGESPERBLOCK int "Max pages per block" default 256 ---help--- Maximum number of pages in one block config MTD_NAND_MAXPAGEDATASIZE int "Max page size" default 4096 ---help--- Maximum size of the data area of one page, in bytes. config MTD_NAND_MAXPAGESPARESIZE int "Max size of spare area" default 256 ---help--- Maximum size of the spare area of one page, in bytes. config MTD_NAND_MAXSPAREECCBYTES int "Max number of ECC bytes" default 48 ---help--- Maximum number of ECC bytes stored in the spare for one single page. config MTD_NAND_BLOCKCHECK bool "Block check" default y ---help--- Enable support for ECC and bad block checking. config MTD_NAND_SWECC bool "Software ECC support" default !ARCH_NAND_HWECC ---help--- Build in logic to support software calculation of ECC. config MTD_NAND_HWECC bool "Hardware ECC support" default n depends on ARCH_NAND_HWECC ---help--- Build in logic to support hardware calculation of ECC. config MTD_NAND_MAXSPAREEXTRABYTES int "Max extra free bytes" default 206 ---help--- Maximum number of extra free bytes inside the spare area of a page. config MTD_NAND_EMBEDDEDECC bool "Support devices with Embedded ECC" default n ---help--- Some NAND devices have internal, embedded ECC function. One (the only one supported) is Micron, 4-bit ECC, device size = 1Gb or 2Gb or 4Gb. config MTD_NAND_RAM bool "Enable virtual NAND Flash" default n ---help--- Enable a virtual NAND Flash device emulated from RAM in the simulator. if MTD_NAND_RAM config MTD_NAND_RAM_SIZE int "Size of the virtual NAND Flash in MB." default 2 ---help--- Size of the virtual NAND Flash in megabytes. config MTD_NAND_RAM_DEBUG bool "Enable debugging of virtual NAND Flash." default n ---help--- Enables debug info being written to syslog for virtual NAND Flash device emulated from RAM in the simulator. config MTD_NAND_RAM_DEBUG_LEVEL int "Debugging level of virtual NAND Flash raw lower half operations." depends on MTD_NAND_RAM_DEBUG default 1 range 1 3 ---help--- 1 - Log every instruction. 2 - Log every 5 instructions. 3 - Log every 10 instructions. config MTD_NAND_RAM_STATUS int "Log status of virtual NAND Flash." depends on MTD_NAND_RAM_DEBUG default 3 range 1 10 ---help--- 1 - Log every instruction. 2 - Log every 5 instructions. 3 - Log every 10 instructions. 4 - Log every 50 instructions. 5 - Log every 100 instructions. 6 - Log every 500 instructions. 7 - Log every 1000 instructions. 8 - Log every 5000 instructions. 9 - Log every 10000 instructions. 10 - Log every 50000 instructions. endif #MTD_NAND_RAM config MTD_NAND_WRAPPER bool "Enable logging wrapper for NAND flash upper half operations." default n if MTD_NAND_WRAPPER config MTD_NAND_WRAPPER_DEBUG_LEVEL int "Log level of upper half of virtual NAND Flash." default 1 range 1 3 ---help--- 1 - Log every instruction. 2 - Log every 5 instructions. 3 - Log every 10 instructions. endif # MTD_NAND_WRAPPER endif # MTD_NAND config RPMSGMTD bool "MTD RPMSG Client Enable" default n depends on RPMSG config RPMSGMTD_SERVER bool "MTD RPMSG Server Enable" default n depends on RPMSG 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. endif # RAMMTD config FILEMTD bool "File-based MTD driver" default n ---help--- Build support for a File-based MTD driver. if FILEMTD config FILEMTD_BLOCKSIZE int "File MTD default block size" default 512 config FILEMTD_ERASESIZE int "File MTD default erase block size" default 4096 config FILEMTD_ERASESTATE hex "Simulated erase state" default 0xff config MTD_LOOP bool "Enable MTD loop device" default n endif # FILEMTD config NULLMTD bool "MTD null driver" default n ---help--- Build support for a MTD null driver. It simulates an always erased MTD device. if NULLMTD config NULLMTD_BLOCKSIZE int "MTD null default block size" default 512 config NULLMTD_ERASESIZE int "MTD null default erase block size" default 4096 config NULLMTD_ERASESTATE hex "Simulated erase state" default 0xff endif # NULLMTD 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_MULTI bool "Multiple AT24XX devices" default n ---help--- Build in additional support for multiple AT24XX devices, each with dynamically allocated device structures with a separate I2C addresses (but otherwise identical -- support for multiple, different AT24xx, devices not yet supported). config AT24XX_SIZE int "AT24xx size (Kbit)" default 64 ---help--- This is the XX in the AT24Cxx part number. For example, if you have an AT24C64, then the correct value is 64. This value is also the capacity of the part in kilobits. For example, the 64 supports 64 Kbits or 64/8 = 8 KiB. config AT24XX_ADDR hex "AT24XX I2C address" default 0x50 range 0x50 0x57 depends on !AT24XX_MULTI ---help--- The I2C address of the FLASH part. This is should be 0b01010aaa (where aaa is determined by board/pin configuration). For accesses to "extended memory" accesses, the driver will set bit 3 of this address using 0xb01011aaa as the I2C address. config AT24XX_EXTENDED bool "Extended memory" default n ---help--- If the device supports extended memory, then this operation may be set to enable the MTDIOC_EXTENDED ioctl() operation. When the extended operation is selected, calls to the driver read method will return data from the extended memory region. config AT24XX_EXTSIZE int "Extended memory size (bytes)" default 0 depends on AT24XX_EXTENDED ---help--- If the device supports extended memory, then this option provides the size of the memory in bytes. Other, block-oriented access are not effected by this setting config AT24XX_FREQUENCY int "AT24xx I2C bus frequency" default 100000 ---help--- Set the I2C frequency to use when accessing the AT24CXX EEPROM. This value must represent a valid I2C speed (normally less than 400.000) or the driver might fail. endif # MTD_AT24XX config MTD_AT25EE bool "SPI-based AT25xx EEPROM" default n select SPI select MTD_BYTE_WRITE ---help--- Build support for SPI-based AT25xx type EEPROMs. MTD on EEPROM can perform poorly, so it is possible only usable if the EEPROM has a clock speed 10MHz or higher. EEPROMs that use the same commands as the 25AA160 should work OK. if MTD_AT25EE choice prompt "Block Size" default USE_NATIVE_AT25EE_BLOCK_SIZE ---help--- For applications where a file system is used on the AT25 EEPROM, the tiny page sizes will result in very inefficient EEPROM usage. In such cases, it is better if blocks are comprised of "clusters" of pages so that the file system block size is, say, 128, 256 or 512 bytes. In any event, the block size *must* be an even multiple of the number of pages and, often, needs to be a factor 2. This is up to the user to check! config USE_NATIVE_AT25EE_BLOCK_SIZE bool "Use EEPROM's native block size" config MANUALLY_SET_AT25EE_BLOCK_SIZE bool "Manually set block size" endchoice # Block Size if MANUALLY_SET_AT25EE_BLOCK_SIZE config MANUAL_AT25EE_BLOCK_SIZE int "Manually-set EEPROM block size" default 512 endif # MANUALLY_SET_BLOCK_SIZE config AT25EE_ENABLE_BLOCK_ERASE bool "Enabled block erase" default n ---help--- EEPROM does not need to be erased before write. However, in some applications (e.g if an erase verify is wanted, or if a particular file system requires this) block erase (i.e. writing each byte to 0xff) can be enabled here. config AT25EE_SPIMODE int "AT25EE SPI Mode" default 0 config AT25EE_SPIFREQUENCY int "AT25EE SPI Frequency" default 10000000 config AT25EE_START_DELAY int "AT25EE startdelay" ---help--- The delay between CS active and first CLK. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 config AT25EE_STOP_DELAY int "AT25EE stopdelay" ---help--- The delay between last CLK and CS inactive. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 config AT25EE_CS_DELAY int "AT25EE csdelay" ---help--- The delay between CS inactive and CS active again. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 config AT25EE_IFDELAY int "AT25EE ifdelay" ---help--- The delay between frames. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 endif # MTD_AT25EE config MTD_AT25 bool "SPI-based AT25 FLASH" default n select SPI if MTD_AT25 config AT25_SPIMODE int "AT25 SPI Mode" default 0 config AT25_SPIFREQUENCY int "AT25 SPI Frequency" default 20000000 endif # MTD_AT25 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 "Enable higher performance write logic" default y config AT45DB_PWRSAVE bool "Enable power save" default n endif # MTD_AT45DB config MTD_IS25XP bool "SPI-based IS25XP FLASH" default n select SPI if MTD_IS25XP config IS25XP_SPIMODE int "IS25 SPI Mode" default 0 config IS25XP_SPIFREQUENCY int "IS25 SPI Frequency" default 20000000 endif # MTD_IS25XP config MTD_M25P bool "SPI-based M25P/MT25Q FLASH" default n select SPI if MTD_M25P config M25P_SPIMODE int "M25P SPI mode" default 0 config M25P_SPIFREQUENCY int "M25P SPI Frequency" default 20000000 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 memory type for "F" series parts from EON is 0x31. The 4K sector erase size will automatically be enabled when filesystems that can use it are enabled, such as SMART. config MT25Q_MEMORY_TYPE hex "MT25Q memory type ID" default 0xBA ---help--- The memory type for MT25 "Q" series is 0xBA. 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. endif # MTD_M25P config MTD_MX25L bool "SPI-based MX25L3233F / MX25L6433F" default n select SPI ---help--- SPI-based driver for Macronix MX25L3233F or MX25L6433F. if MTD_MX25L config MX25L_SPIMODE int "MX25L SPI mode" default 0 config MX25L_SPIFREQUENCY int "MX25L SPI Frequency" default 20000000 config MX25L_SECTOR512 bool "Simulate 512 byte Erase Blocks" default n config MX25L_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 MX25L_DEBUG bool "Enable driver debug features" default n endif # MTD_MX25L config MTD_MX35 bool "SPI-based MX35LF1GE4AB / MX35LF2GE4AB" default n select SPI ---help--- SPI-based driver for Macronix MX35LF1GE4AB or MX35LF2GE4AB. if MTD_MX35 config MX35_SPIMODE int "MX35 SPI mode" default 0 config MX35_SPIFREQUENCY int "MX35 SPI Frequency" default 104000000 ---help--- SPI frequency for MX35 is 104 MHz. endif # MTD_MX35 config MTD_S25FL1 bool "QuadSPI-based S25FL1 FLASH" default n if MTD_S25FL1 config S25FL1_QSPIMODE int "S25FL1 QuadSPI Mode" default 0 config S25FL1_QSPI_FREQUENCY int "S25FL1 QuadSPI Frequency" default 108000000 ---help--- Per data sheet: – Normal Read (Serial): – 50 MHz clock rate (-40°C to +85°C/105°C) – 45 MHz clock rate (-40°C to +125°C) – Fast Read (Serial): – 108 MHz clock rate (-40°C to +85°C/105°C) – 97 MHz clock rate (-40°C to +125°C) – Dual Read: – 108 MHz clock rate (-40°C to +85°C/105°C) – 97 MHz clock rate (-40°C to +125°C) – Quad Read: – 108 MHz clock rate (-40°C to +85°C/105°C) – 97 MHz clock rate for S25FL164K (-40°C to +125°C) - Clock frequency for all SPI commands except for Read Data command (0x03) and Fast Read command (0x0b): 108 MHz - Clock frequency for Read Data command (0x03): 50 MHz - Clock frequency for all Fast Read commands SIO and MIO: 108 MHz In this implementation, only "Quad" reads are performed. config S25FL1_SECTOR512 bool "Simulate 512 byte Erase Blocks" default n config S25FL1_SCRAMBLE bool "Scramble data" default n ---help--- Requires driver support for data scrambling/descrambling. config S25FL1_SCRAMBLE_KEY hex "Scramble key" default 0x0baddead depends on S25FL1_SCRAMBLE endif # MTD_S25FL1 config MTD_N25QXXX bool "QuadSPI-based Micron N25QXXX family FLASH" default n ---help--- Support the N25Q016A, N25Q032A, N25Q064A, N25Q128A, N25Q256A if MTD_N25QXXX config N25QXXX_QSPIMODE int "N25QXXX QuadSPI Mode" default 0 ---help--- This device can operate in SPI mode 0 or 3. config N25QXXX_QSPI_FREQUENCY int "N25QXXX QuadSPI Frequency" default 108000000 ---help--- - Clock frequency for all SPI commands except for Read Data command (0x03) - Clock frequency for Read Data command (0x03): 54 MHz In this implementation, only "Quad" reads are performed. config N25QXXX_SECTOR512 bool "Simulate 512 byte Erase Blocks" default n endif # MTD_N25QXXX config MTD_W25QXXXJV bool "QuadSPI-based Winbond W25QXXXJV family FLASH" default n ---help--- Support the W25Q016JV, W25Q032JV, W25Q064JV, W25Q128JV, W25Q256JV, W25Q512JV, W25Q01JV if MTD_W25QXXXJV config W25QXXXJV_QSPIMODE int "W25QXXXJV QuadSPI Mode" default 0 ---help--- This device can operate in SPI mode 0 or 3. config W25QXXXJV_QSPI_FREQUENCY int "W25QXXXJV QuadSPI Frequency" default 133000000 ---help--- Per data sheet: – 133MHz Single, Dual/Quad SPI clocks – 266/532MHz equivalent Dual/Quad SPI – 66MB/S continuous data transfer rate config W25QXXXJV_SECTOR512 bool "Simulate 512 byte Erase Blocks" default n endif # MTD_W25QXXXJV config MTD_MX25RXX bool "QuadSPI-based Macronix MX25RXX family FLASH" default n ---help--- Support the MX25R6435F chip if MTD_MX25RXX config MX25RXX_QSPIMODE int "MX25RXX QuadSPI Mode" default 0 ---help--- This device can operate in SPI mode 0 or 3. config MX25RXX_QSPI_FREQUENCY int "MX25RXX QuadSPI Frequency" default 33000000 ---help--- Clock frequency for all SPI commands except for Read Data command. Dual and Quad read methods need different frequency in low power mode (Only Quad read is supported in this driver). config MX25RXX_QSPI_READ_FREQUENCY int "MX25RXX QuadSPI Read command frequency" default 8000000 ---help--- Clock frequency for read data command. Only Quad read is supported in this driver. config MX25RXX_SECTOR512 bool "Simulate 512 byte Erase Blocks" default n config MX25RXX_PAGE128 bool "128 byte size pages" default n config MX25RXX_LXX bool "Run MX25RXX driver in MX25LXX mode" default n endif # MTD_MX25RXX config MTD_SMART bool "Sector Mapped Allocation for Really Tiny (SMART) Flash support" default n ---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. if MTD_SMART config SMART_DEV_LOOP bool "Enable SMART loop device" select FILEMTD default n ---help--- Supports a smart loop device that can be used to export a file (or character device) as a SMART block device. config MTD_SMART_SECTOR_SIZE int "SMART Device sector size" default 1024 ---help--- Sets the size of a single allocation on the SMART device. Larger sector sizes reduce overhead per sector, but cause more wasted space with a lot of smaller files. config MTD_SMART_WRITEBUFFER bool "Enable SMART write buffering" default n depends on DRVR_WRITEBUFFER config MTD_SMART_READAHEAD bool "Enable SMART read-ahead buffering" default n depends on DRVR_READAHEAD config MTD_SMART_WEAR_LEVEL bool "Support FLASH wear leveling" depends on MTD_SMART default y ---help--- Adds extra logic and RAM to guarantee equal wear leveling of the FLASH device by recording and monitoring erase block operations and selecting sector allocations to ensure all erase blocks are worn evenly. This will evenly wear both dynamic and static data on the device. if MTD_SMART_WEAR_LEVEL && !SMART_CRC_16 config MTD_SMART_CONVERT_WEAR_FORMAT bool "Convert existing non wear leveling FLASH to wear leveling" default n ---help--- Adds a little extra code which detects an existing SMART format on a device that was created prior to the wear leveling implementation. This conversion only works if either no CRC is being used or if CRC-8 is being used as other CRC versions use a different header format and require a mksmartfs on the device even if an existing format is there endif # MTD_SMART_WEAR_LEVEL && !SMART_CRC_16 config MTD_SMART_ENABLE_CRC bool "Enable Sector CRC error detection" depends on MTD_SMART default n ---help--- Enables logic to compute and validate a CRC for logical sectors. The CRC is calculated for all bytes in the logical sector. The CRC size is selectable (8-bit, 16-bit, 32-bit). For added protection, larger CRCs should be used with larger (2K - 4K) sector sizes. Enabling CRC protection will cause increased sector relocation and increased erase block erasures since directory and wear-level status updates can no longer be performed in-place and mandate re-writing the information to a new sector. An 8-bit CRC protection scheme can be added to an existing non-CRC formatted SMART volume without needing to reformat the drive. As sectors are re-written or relocated, they will be converted to CRC protected sectors. choice prompt "CRC level selection" depends on MTD_SMART_ENABLE_CRC default SMART_CRC_8 ---help--- Select the level of CRC protection implemented in the SMART MTD layer. Smaller CRC selection uses less overhead per logical sectors, but also has a higher probability of not detecting multiple bit errors. Devices with larger logical sector sizes should use a larger CRC. config SMART_CRC_8 bool "CRC-8" config SMART_CRC_16 bool "CRC-16" endchoice # CRC level selection config MTD_SMART_FSCK bool "Enable SMART file system check" default n ---help--- Enables fsck to check and repair the SMART file system. config MTD_SMART_FSCK_ENABLE_CRC bool "Enable SMART file system CRC check during fsck" default n depends on MTD_SMART_FSCK && MTD_SMART_ENABLE_CRC ---help--- Enables CRC check during fsck. It's possible to check the file system strictly, but it takes long time to do fsck. config MTD_SMART_MINIMIZE_RAM bool "Minimize SMART RAM usage using logical sector cache" depends on MTD_SMART default 0 ---help--- Reduces RAM usage in the SMART MTD layer by replacing the 1-for-1 logical to physical sector map with a smaller cache-based structure. This can save a considerable amount of RAM on devices with a large sector count, but at the expense of increased read/write times when a cache miss occurs. If the requested logical sector has not been cached, then the device will need to be scanned to located it on the physical medium. config MTD_SMART_SECTOR_CACHE_SIZE int "Number of entries in the SMART logical sector cache" depends on MTD_SMART_MINIMIZE_RAM default 512 ---help--- Sets the size of the cache used for logical to physical sector mapping. A larger number allows larger files to be "seek"ed randomly without encountering cache misses. Any files larger than CACHE_SIZE * SECTOR_SIZE that are sought start to end will cause the cache to flush forcing manual scanning of the MTD device to find the logical to physical mappings. config MTD_SMART_SECTOR_PACK_COUNTS bool "Pack free and release counts when possible" depends on MTD_SMART_MINIMIZE_RAM default y ---help--- For volumes with 16 sectors per erase block or less, this option causes the free sector and released sector counts used for allocation and garbage collection to be packed such that two values are stored per byte. For volumes with 16 sectors per erase block, the 4 LSBs are packed and all of the high-order bits are packed separately (8 per byte). This squeezes even more RAM out. config MTD_SMART_SECTOR_ERASE_DEBUG bool "Track Erase Block erasure counts" depends on MTD_SMART default n ---help--- Allocates an Erase Block erase count array and keeps track of the number of erases per erase block. This data is then presented on the procfs interface. config MTD_SMART_ALLOC_DEBUG bool "RAM Allocation Debug" depends on MTD_SMART default n ---help--- Records all SMART MTD layer allocations for debug purposes and makes them accessible from the ProcFS interface if it is enabled. endif # MTD_SMART config MTD_RAMTRON bool "SPI-based RAMTRON NVRAM Devices FM25V10" default n select SPI ---help--- SPI-based RAMTRON NVRAM Devices FM25V10 if MTD_RAMTRON config RAMTRON_SETSPEED bool "Adjustable bus speed" default n ---help--- Select an option to provide an ioctl, MTDIOC_SETSPEED call that supports dynamic selection of the RAMTRON bus speed. config RAMTRON_CHUNKING bool "Support chunked writes" default n ---help--- Some Re-RAMs like MB85AS4MT have write buffer size limitation and require smaller, "chunked" writes. config RAMTRON_EMULATE_SECTOR_SHIFT int "RAMTRON emulates sector size by setting shift value" default 9 ---help--- RAMTRON devices do not have pages and sectors. For purpose of the VFAT file system, we emulate them. Specify sector shift value to determine emulated sector size. The relationship between sector shift value and emulated sector size is described in the equation: RAMTRON_EMULATE_SECTOR_SIZE = (1 << RAMTRON_EMULATE_SECTOR_SHIFT) sector shift value : sector size in bytes 0 : 1 1 : 2 2 : 4 3 : 8 4 : 16 5 : 32 6 : 64 7 : 128 8 : 256 9 : 512 config RAMTRON_EMULATE_PAGE_SHIFT int "RAMTRON emulates page size by setting shift value" default 9 ---help--- RAMTRON devices do not have pages and sectors. For purpose of the VFAT file system, we emulate them. Specify page shift value to determine emulated page size. The relationship between page shift value and emulated page size is described in the equation: RAMTRON_EMULATE_PAGE_SIZE = (1 << RAMTRON_EMULATE_PAGE_SHIFT) page shift value : page size in bytes 0 : 1 1 : 2 2 : 4 3 : 8 4 : 16 5 : 32 6 : 64 7 : 128 8 : 256 9 : 512 endif # MTD_RAMTRON 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 n ---help--- There used to be a bug in the current code when using the higher speed AAI write sequence. The nature of the bug is that the WRDI instruction is not working. At the end of the AAI sequence, the status register continues to report that the SST25 is write enabled (WEL bit) and in AAI mode (AAI bit). This has been fixed by David Sidrane! config SST25_SLOWREAD bool default n endif # MTD_SST25 config MTD_SST25XX bool "SPI-based SST25XX FLASH (64-MBit and larger)" default n select SPI ---help--- With the 64 MBit and larger parts, SST changed the write mechanism to support page write instead of byte/word write like the smaller parts. As a result, the SST25 driver is not compatible with the larger density parts, and the SST25XX driver must be used instead. if MTD_SST25XX config SST25XX_SPIMODE int "SST25 SPI Mode" default 0 config SST25XX_SPIFREQUENCY int "SST25 SPI Frequency" default 20000000 config SST25XX_MANUFACTURER hex "Manufacturers ID" default 0xBF ---help--- Various manufacturers may have produced the parts. 0xBF is the manufacturer ID for the parts manufactured by SST. config SST25XX_MEMORY_TYPE hex "Memory type ID" default 0x25 ---help--- The memory type for SST25VF065 series is 0x25, but this can be modified if needed to support compatible devices from different manufacturers. endif # MTD_SST25XX config MTD_SST26 bool "SPI/QSPI-based SST26XX FLASHes (16,32,64-MBit)" default n select SPI ---help--- These part are also different from SST25 and SST25XX, they support both SPI and QSPI. if MTD_SST26 config SST26_SPIMODE int "SST26 (Q)SPI Mode" default 0 config SST26_SPIFREQUENCY int "SST26 (Q)SPI Frequency" default 64000000 config SST26_MANUFACTURER hex "Manufacturers ID" default 0xBF ---help--- Various manufacturers may have produced the parts. 0xBF is the manufacturer ID for the parts manufactured by SST. config SST26_MEMORY_TYPE hex "Memory type ID" default 0x26 ---help--- The memory type for SST26VF0xx series is 0x26, but this can be modified if needed to support compatible devices from different manufacturers. config SST26_DEBUG bool "Debug output from the SST26 driver" depends on DEBUG_FS default n endif # MTD_SST26 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 # MTD_SST39FV 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 "Enable slow read mode" default n config W25_DEBUG bool "Enable syslog W25 specific syslog traces" default n endif # MTD_W25 config MTD_GD25 bool "SPI-based GD25 FLASH" default n select SPI if MTD_GD25 config GD25_SPIMODE int "GD25 SPI Mode" default 0 config GD25_SPIFREQUENCY int "GD25 SPI Frequency" default 20000000 config GD25_READONLY bool "GD25 Read-Only FLASH" default n config GD25_SLOWREAD bool default n config GD25_START_DELAY int "GD25 startdelay" ---help--- The delay between CS active and first CLK. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 config GD25_STOP_DELAY int "GD25 stopdelay" ---help--- The delay between last CLK and CS inactive. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 config GD25_CS_DELAY int "GD25 csdelay" ---help--- The delay between CS inactive and CS active again. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 config GD25_IFDELAY int "GD25 ifdelay" ---help--- The delay between frames. In ns. depends on SPI_DELAY_CONTROL range 0 1000000 default 5000 endif # MTD_GD25 config MTD_GD5F bool "SPI-based GD5F nand FLASH" default n select SPI if MTD_GD5F config GD5F_SPIMODE int "GD5F SPI Mode" default 0 config GD5F_SPIFREQUENCY int "GD5F SPI Frequency" default 20000000 endif # MTD_GD5F config MTD_DHARA bool "MTD Nandflash use dhara map" default n if MTD_DHARA config DHARA_GC_RATIO int "dhara garbage collection ratio" default 4 config DHARA_READ_NCACHES int "dhara read cache numbers" default 4 endif endif # MTD