1# SPDX-License-Identifier: GPL-2.0-only 2menu "Self-contained MTD device drivers" 3 depends on MTD!=n 4 depends on HAS_IOMEM 5 6config MTD_PMC551 7 tristate "Ramix PMC551 PCI Mezzanine RAM card support" 8 depends on PCI 9 help 10 This provides a MTD device driver for the Ramix PMC551 RAM PCI card 11 from Ramix Inc. <http://www.ramix.com/products/memory/pmc551.html>. 12 These devices come in memory configurations from 32M - 1G. If you 13 have one, you probably want to enable this. 14 15 If this driver is compiled as a module you get the ability to select 16 the size of the aperture window pointing into the devices memory. 17 What this means is that if you have a 1G card, normally the kernel 18 will use a 1G memory map as its view of the device. As a module, 19 you can select a 1M window into the memory and the driver will 20 "slide" the window around the PMC551's memory. This was 21 particularly useful on the 2.2 kernels on PPC architectures as there 22 was limited kernel space to deal with. 23 24config MTD_PMC551_BUGFIX 25 bool "PMC551 256M DRAM Bugfix" 26 depends on MTD_PMC551 27 help 28 Some of Ramix's PMC551 boards with 256M configurations have invalid 29 column and row mux values. This option will fix them, but will 30 break other memory configurations. If unsure say N. 31 32config MTD_PMC551_DEBUG 33 bool "PMC551 Debugging" 34 depends on MTD_PMC551 35 help 36 This option makes the PMC551 more verbose during its operation and 37 is only really useful if you are developing on this driver or 38 suspect a possible hardware or driver bug. If unsure say N. 39 40config MTD_MS02NV 41 tristate "DEC MS02-NV NVRAM module support" 42 depends on MACH_DECSTATION 43 help 44 This is an MTD driver for the DEC's MS02-NV (54-20948-01) battery 45 backed-up NVRAM module. The module was originally meant as an NFS 46 accelerator. Say Y here if you have a DECstation 5000/2x0 or a 47 DECsystem 5900 equipped with such a module. 48 49 If you want to compile this driver as a module ( = code which can be 50 inserted in and removed from the running kernel whenever you want), 51 say M here and read <file:Documentation/kbuild/modules.rst>. 52 The module will be called ms02-nv. 53 54config MTD_DATAFLASH 55 tristate "Support for AT45xxx DataFlash" 56 depends on SPI_MASTER 57 help 58 This enables access to AT45xxx DataFlash chips, using SPI. 59 Sometimes DataFlash chips are packaged inside MMC-format 60 cards; at this writing, the MMC stack won't handle those. 61 62config MTD_DATAFLASH_WRITE_VERIFY 63 bool "Verify DataFlash page writes" 64 depends on MTD_DATAFLASH 65 help 66 This adds an extra check when data is written to the flash. 67 It may help if you are verifying chip setup (timings etc) on 68 your board. There is a rare possibility that even though the 69 device thinks the write was successful, a bit could have been 70 flipped accidentally due to device wear or something else. 71 72config MTD_DATAFLASH_OTP 73 bool "DataFlash OTP support (Security Register)" 74 depends on MTD_DATAFLASH 75 help 76 Newer DataFlash chips (revisions C and D) support 128 bytes of 77 one-time-programmable (OTP) data. The first half may be written 78 (once) with up to 64 bytes of data, such as a serial number or 79 other key product data. The second half is programmed with a 80 unique-to-each-chip bit pattern at the factory. 81 82config MTD_MCHP23K256 83 tristate "Microchip 23K256 SRAM" 84 depends on SPI_MASTER 85 help 86 This enables access to Microchip 23K256 SRAM chips, using SPI. 87 88 Set up your spi devices with the right board-specific 89 platform data, or a device tree description if you want to 90 specify device partitioning 91 92config MTD_MCHP48L640 93 tristate "Microchip 48L640 EERAM" 94 depends on SPI_MASTER 95 help 96 This enables access to Microchip 48L640 EERAM chips, using SPI. 97 98config MTD_SPEAR_SMI 99 tristate "SPEAR MTD NOR Support through SMI controller" 100 depends on PLAT_SPEAR || COMPILE_TEST 101 default y 102 help 103 This enable SNOR support on SPEAR platforms using SMI controller 104 105config MTD_SST25L 106 tristate "Support SST25L (non JEDEC) SPI Flash chips" 107 depends on SPI_MASTER 108 help 109 This enables access to the non JEDEC SST25L SPI flash chips, used 110 for program and data storage. 111 112 Set up your spi devices with the right board-specific platform data, 113 if you want to specify device partitioning. 114 115config MTD_BCM47XXSFLASH 116 tristate "Support for serial flash on BCMA bus" 117 depends on BCMA_SFLASH && (MIPS || ARM) 118 help 119 BCMA bus can have various flash memories attached, they are 120 registered by bcma as platform devices. This enables driver for 121 serial flash memories. 122 123config MTD_SLRAM 124 tristate "Uncached system RAM" 125 help 126 If your CPU cannot cache all of the physical memory in your machine, 127 you can still use it for storage or swap by using this driver to 128 present it to the system as a Memory Technology Device. 129 130config MTD_PHRAM 131 tristate "Physical system RAM" 132 help 133 This is a re-implementation of the slram driver above. 134 135 Use this driver to access physical memory that the kernel proper 136 doesn't have access to, memory beyond the mem=xxx limit, nvram, 137 memory on the video card, etc... 138 139config MTD_MTDRAM 140 tristate "Test driver using RAM" 141 help 142 This enables a test MTD device driver which uses vmalloc() to 143 provide storage. You probably want to say 'N' unless you're 144 testing stuff. 145 146config MTDRAM_TOTAL_SIZE 147 int "MTDRAM device size in KiB" 148 depends on MTD_MTDRAM 149 default "4096" 150 help 151 This allows you to configure the total size of the MTD device 152 emulated by the MTDRAM driver. If the MTDRAM driver is built 153 as a module, it is also possible to specify this as a parameter when 154 loading the module. 155 156config MTDRAM_ERASE_SIZE 157 int "MTDRAM erase block size in KiB" 158 depends on MTD_MTDRAM 159 default "128" 160 help 161 This allows you to configure the size of the erase blocks in the 162 device emulated by the MTDRAM driver. If the MTDRAM driver is built 163 as a module, it is also possible to specify this as a parameter when 164 loading the module. 165 166config MTD_BLOCK2MTD 167 tristate "MTD using block device" 168 depends on BLOCK 169 help 170 This driver allows a block device to appear as an MTD. It would 171 generally be used in the following cases: 172 173 Using Compact Flash as an MTD, these usually present themselves to 174 the system as an ATA drive. 175 Testing MTD users (eg JFFS2) on large media and media that might 176 be removed during a write (using the floppy drive). 177 178config MTD_POWERNV_FLASH 179 tristate "powernv flash MTD driver" 180 depends on PPC_POWERNV 181 help 182 This provides an MTD device to access flash on powernv OPAL 183 platforms from Linux. This device abstracts away the 184 firmware interface for flash access. 185 186comment "Disk-On-Chip Device Drivers" 187 188config MTD_DOCG3 189 tristate "M-Systems Disk-On-Chip G3" 190 select BCH 191 select BCH_CONST_PARAMS if !MTD_NAND_ECC_SW_BCH 192 select BITREVERSE 193 help 194 This provides an MTD device driver for the M-Systems DiskOnChip 195 G3 devices. 196 197 The driver provides access to G3 DiskOnChip, distributed by 198 M-Systems and now Sandisk. The support is very experimental, 199 and doesn't give access to any write operations. 200 201config MTD_ST_SPI_FSM 202 tristate "ST Microelectronics SPI FSM Serial Flash Controller" 203 depends on ARCH_STI 204 help 205 This provides an MTD device driver for the ST Microelectronics 206 SPI Fast Sequence Mode (FSM) Serial Flash Controller and support 207 for a subset of connected Serial Flash devices. 208 209if MTD_DOCG3 210config BCH_CONST_M 211 default 14 212config BCH_CONST_T 213 default 4 214endif 215 216endmenu 217