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linux/drivers/mtd/maps/Kconfig
Serge Semin b3e79e7682 mtd: physmap: Add Baikal-T1 physically mapped ROM support 
Baikal-T1 Boot Controller provides an access to a RO storages, which are
physically mapped into the SoC MMIO space. In particularly there are
Internal ROM embedded into the SoC with a pre-installed firmware,
externally attached SPI flash (also accessed in the read-only mode) and a
memory region, which mirrors one of them in accordance with the currently
enabled system boot mode (also called Boot ROM).

This commit adds the Internal ROM support to the physmap driver of the MTD
kernel subsystem. The driver will create the Internal ROM MTD as long as
it is defined in the system dts file. The physically mapped SPI flash
region will be used to implement the SPI-mem interface. The mirroring
memory region won't be accessible directly since it's redundant due to
both bootable regions being exposed anyway.

Note we had to create a dedicated code for the ROMs since read from the
corresponding memory regions must be done via the dword-aligned addresses.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: linux-mips@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200920111445.21816-1-Sergey.Semin@baikalelectronics.ru
2020-10-02 09:08:22 +02:00

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# SPDX-License-Identifier: GPL-2.0-only
menu "Mapping drivers for chip access"
depends on MTD!=n
depends on HAS_IOMEM
config MTD_COMPLEX_MAPPINGS
bool "Support non-linear mappings of flash chips"
help
This causes the chip drivers to allow for complicated
paged mappings of flash chips.
config MTD_PHYSMAP
tristate "Flash device in physical memory map"
depends on MTD_CFI || MTD_JEDECPROBE || MTD_ROM || MTD_RAM || MTD_LPDDR
help
This provides a 'mapping' driver which allows the NOR Flash and
ROM driver code to communicate with chips which are mapped
physically into the CPU's memory. You will need to configure
the physical address and size of the flash chips on your
particular board as well as the bus width, either statically
with config options or at run-time.
To compile this driver as a module, choose M here: the
module will be called physmap.
config MTD_PHYSMAP_COMPAT
bool "Physmap compat support"
depends on MTD_PHYSMAP
default n
help
Setup a simple mapping via the Kconfig options. Normally the
physmap configuration options are done via your board's
resource file.
If unsure, say N here.
config MTD_PHYSMAP_START
hex "Physical start address of flash mapping"
depends on MTD_PHYSMAP_COMPAT
default "0x8000000"
help
This is the physical memory location at which the flash chips
are mapped on your particular target board. Refer to the
memory map which should hopefully be in the documentation for
your board.
config MTD_PHYSMAP_LEN
hex "Physical length of flash mapping"
depends on MTD_PHYSMAP_COMPAT
default "0"
help
This is the total length of the mapping of the flash chips on
your particular board. If there is space, or aliases, in the
physical memory map between the chips, this could be larger
than the total amount of flash present. Refer to the memory
map which should hopefully be in the documentation for your
board.
config MTD_PHYSMAP_BANKWIDTH
int "Bank width in octets"
depends on MTD_PHYSMAP_COMPAT
default "2"
help
This is the total width of the data bus of the flash devices
in octets. For example, if you have a data bus width of 32
bits, you would set the bus width octet value to 4. This is
used internally by the CFI drivers.
config MTD_PHYSMAP_OF
bool "Memory device in physical memory map based on OF description"
depends on OF && MTD_PHYSMAP
help
This provides a 'mapping' driver which allows the NOR Flash, ROM
and RAM driver code to communicate with chips which are mapped
physically into the CPU's memory. The mapping description here is
taken from OF device tree.
config MTD_PHYSMAP_BT1_ROM
bool "Baikal-T1 Boot ROMs OF-based physical memory map handling"
depends on MTD_PHYSMAP_OF
depends on MIPS_BAIKAL_T1 || COMPILE_TEST
select MTD_COMPLEX_MAPPINGS
select MULTIPLEXER
select MUX_MMIO
help
This provides some extra DT physmap parsing for the Baikal-T1
platforms, some detection and setting up ROMs-specific accessors.
config MTD_PHYSMAP_VERSATILE
bool "ARM Versatile OF-based physical memory map handling"
depends on MTD_PHYSMAP_OF
depends on MFD_SYSCON
default y if (ARCH_INTEGRATOR || ARCH_VERSATILE || ARCH_REALVIEW)
help
This provides some extra DT physmap parsing for the ARM Versatile
platforms, basically to add a VPP (write protection) callback so
the flash can be taken out of write protection.
config MTD_PHYSMAP_GEMINI
bool "Cortina Gemini OF-based physical memory map handling"
depends on MTD_PHYSMAP_OF
depends on MFD_SYSCON
select MTD_COMPLEX_MAPPINGS
default ARCH_GEMINI
help
This provides some extra DT physmap parsing for the Gemini
platforms, some detection and setting up parallel mode on the
external interface.
config MTD_PHYSMAP_IXP4XX
bool "Intel IXP4xx OF-based physical memory map handling"
depends on MTD_PHYSMAP_OF
depends on ARM
select MTD_COMPLEX_MAPPINGS
select MTD_CFI_BE_BYTE_SWAP if CPU_BIG_ENDIAN
default ARCH_IXP4XX
help
This provides some extra DT physmap parsing for the Intel IXP4xx
platforms, some elaborate endianness handling in particular.
config MTD_PHYSMAP_GPIO_ADDR
bool "GPIO-assisted Flash Chip Support"
depends on MTD_PHYSMAP
depends on GPIOLIB || COMPILE_TEST
depends on MTD_COMPLEX_MAPPINGS
help
Extend the physmap driver to allow flashes to be partially
physically addressed and assisted by GPIOs.
config MTD_PMC_MSP_EVM
tristate "CFI Flash device mapped on PMC-Sierra MSP"
depends on PMC_MSP && MTD_CFI
help
This provides a 'mapping' driver which supports the way
in which user-programmable flash chips are connected on the
PMC-Sierra MSP eval/demo boards.
choice
prompt "Maximum mappable memory available for flash IO"
depends on MTD_PMC_MSP_EVM
default MSP_FLASH_MAP_LIMIT_32M
config MSP_FLASH_MAP_LIMIT_32M
bool "32M"
endchoice
config MSP_FLASH_MAP_LIMIT
hex
default "0x02000000"
depends on MSP_FLASH_MAP_LIMIT_32M
config MTD_SUN_UFLASH
tristate "Sun Microsystems userflash support"
depends on SPARC && MTD_CFI && PCI
help
This provides a 'mapping' driver which supports the way in
which user-programmable flash chips are connected on various
Sun Microsystems boardsets. This driver will require CFI support
in the kernel, so if you did not enable CFI previously, do that now.
config MTD_SC520CDP
tristate "CFI Flash device mapped on AMD SC520 CDP"
depends on (MELAN || COMPILE_TEST) && MTD_CFI
help
The SC520 CDP board has two banks of CFI-compliant chips and one
Dual-in-line JEDEC chip. This 'mapping' driver supports that
arrangement, implementing three MTD devices.
config MTD_NETSC520
tristate "CFI Flash device mapped on AMD NetSc520"
depends on (MELAN || COMPILE_TEST) && MTD_CFI
help
This enables access routines for the flash chips on the AMD NetSc520
demonstration board. If you have one of these boards and would like
to use the flash chips on it, say 'Y'.
config MTD_TS5500
tristate "JEDEC Flash device mapped on Technologic Systems TS-5500"
depends on TS5500 || COMPILE_TEST
select MTD_JEDECPROBE
select MTD_CFI_AMDSTD
help
This provides a driver for the on-board flash of the Technologic
System's TS-5500 board. The 2MB flash is split into 3 partitions
which are accessed as separate MTD devices.
mtd0 and mtd2 are the two BIOS drives, which use the resident
flash disk (RFD) flash translation layer.
mtd1 allows you to reprogram your BIOS. BE VERY CAREFUL.
Note that jumper 3 ("Write Enable Drive A") must be set
otherwise detection won't succeed.
config MTD_SBC_GXX
tristate "CFI Flash device mapped on Arcom SBC-GXx boards"
depends on X86 && MTD_CFI_INTELEXT && MTD_COMPLEX_MAPPINGS
help
This provides a driver for the on-board flash of Arcom Control
Systems' SBC-GXn family of boards, formerly known as SBC-MediaGX.
By default the flash is split into 3 partitions which are accessed
as separate MTD devices. This board utilizes Intel StrataFlash.
More info at
<http://www.arcomcontrols.com/products/icp/pc104/processors/SBC_GX1.htm>.
config MTD_PXA2XX
tristate "CFI Flash device mapped on Intel XScale PXA2xx based boards"
depends on (PXA25x || PXA27x) && MTD_CFI_INTELEXT
help
This provides a driver for the NOR flash attached to a PXA2xx chip.
config MTD_SCx200_DOCFLASH
tristate "Flash device mapped with DOCCS on NatSemi SCx200"
depends on SCx200 && MTD_CFI
help
Enable support for a flash chip mapped using the DOCCS signal on a
National Semiconductor SCx200 processor.
If you don't know what to do here, say N.
If compiled as a module, it will be called scx200_docflash.
config MTD_AMD76XROM
tristate "BIOS flash chip on AMD76x southbridge"
depends on X86 && MTD_JEDECPROBE
help
Support for treating the BIOS flash chip on AMD76x motherboards
as an MTD device - with this you can reprogram your BIOS.
BE VERY CAREFUL.
config MTD_ICHXROM
tristate "BIOS flash chip on Intel Controller Hub 2/3/4/5"
depends on X86 && MTD_JEDECPROBE
help
Support for treating the BIOS flash chip on ICHX motherboards
as an MTD device - with this you can reprogram your BIOS.
BE VERY CAREFUL.
config MTD_ESB2ROM
tristate "BIOS flash chip on Intel ESB Controller Hub 2"
depends on X86 && MTD_JEDECPROBE && PCI
help
Support for treating the BIOS flash chip on ESB2 motherboards
as an MTD device - with this you can reprogram your BIOS.
BE VERY CAREFUL.
config MTD_CK804XROM
tristate "BIOS flash chip on Nvidia CK804"
depends on X86 && MTD_JEDECPROBE && PCI
help
Support for treating the BIOS flash chip on nvidia motherboards
as an MTD device - with this you can reprogram your BIOS.
BE VERY CAREFUL.
config MTD_SCB2_FLASH
tristate "BIOS flash chip on Intel SCB2 boards"
depends on X86 && MTD_JEDECPROBE && PCI
help
Support for treating the BIOS flash chip on Intel SCB2 boards
as an MTD device - with this you can reprogram your BIOS.
BE VERY CAREFUL.
config MTD_TSUNAMI
tristate "Flash chips on Tsunami TIG bus"
depends on ALPHA_TSUNAMI && MTD_COMPLEX_MAPPINGS
help
Support for the flash chip on Tsunami TIG bus.
config MTD_NETtel
tristate "CFI flash device on SnapGear/SecureEdge"
depends on X86 && MTD_JEDECPROBE
help
Support for flash chips on NETtel/SecureEdge/SnapGear boards.
config MTD_LANTIQ
tristate "Lantiq SoC NOR support"
depends on LANTIQ
help
Support for NOR flash attached to the Lantiq SoC's External Bus Unit.
config MTD_L440GX
tristate "BIOS flash chip on Intel L440GX boards"
depends on X86 && MTD_JEDECPROBE
help
Support for treating the BIOS flash chip on Intel L440GX motherboards
as an MTD device - with this you can reprogram your BIOS.
BE VERY CAREFUL.
config MTD_CFI_FLAGADM
tristate "CFI Flash device mapping on FlagaDM"
depends on PPC_8xx && MTD_CFI
help
Mapping for the Flaga digital module. If you don't have one, ignore
this setting.
config MTD_SOLUTIONENGINE
tristate "CFI Flash device mapped on Hitachi SolutionEngine"
depends on SOLUTION_ENGINE && MTD_CFI && MTD_REDBOOT_PARTS
help
This enables access to the flash chips on the Hitachi SolutionEngine and
similar boards. Say 'Y' if you are building a kernel for such a board.
config MTD_SA1100
tristate "CFI Flash device mapped on StrongARM SA11x0"
depends on MTD_CFI && ARCH_SA1100
help
This enables access to the flash chips on most platforms based on
the SA1100 and SA1110, including the Assabet and the Compaq iPAQ.
If you have such a board, say 'Y'.
config MTD_DC21285
tristate "CFI Flash device mapped on DC21285 Footbridge"
depends on MTD_CFI && ARCH_FOOTBRIDGE && MTD_COMPLEX_MAPPINGS
help
This provides a driver for the flash accessed using Intel's
21285 bridge used with Intel's StrongARM processors. More info at
<https://www.intel.com/design/bridge/docs/21285_documentation.htm>.
config MTD_IXP4XX
tristate "CFI Flash device mapped on Intel IXP4xx based systems"
depends on MTD_CFI && MTD_COMPLEX_MAPPINGS && ARCH_IXP4XX
help
This enables MTD access to flash devices on platforms based
on Intel's IXP4xx family of network processors such as the
IXDP425 and Coyote. If you have an IXP4xx based board and
would like to use the flash chips on it, say 'Y'.
config MTD_IMPA7
tristate "JEDEC Flash device mapped on impA7"
depends on ARM && MTD_JEDECPROBE
help
This enables access to the NOR Flash on the impA7 board of
implementa GmbH. If you have such a board, say 'Y' here.
# This needs CFI or JEDEC, depending on the cards found.
config MTD_PCI
tristate "PCI MTD driver"
depends on PCI && MTD_COMPLEX_MAPPINGS
help
Mapping for accessing flash devices on add-in cards like the Intel XScale
IQ80310 card, and the Intel EBSA285 card in blank ROM programming mode
(please see the manual for the link settings).
If you are not sure, say N.
config MTD_PCMCIA
tristate "PCMCIA MTD driver"
depends on PCMCIA && MTD_COMPLEX_MAPPINGS
help
Map driver for accessing PCMCIA linear flash memory cards. These
cards are usually around 4-16MiB in size. This does not include
Compact Flash cards which are treated as IDE devices.
config MTD_PCMCIA_ANONYMOUS
bool "Use PCMCIA MTD drivers for anonymous PCMCIA cards"
depends on MTD_PCMCIA
help
If this option is enabled, PCMCIA cards which do not report
anything about themselves are assumed to be MTD cards.
If unsure, say N.
config MTD_UCLINUX
bool "Generic uClinux RAM/ROM filesystem support"
depends on (MTD_RAM=y || MTD_ROM=y) && (!MMU || COLDFIRE)
help
Map driver to support image based filesystems for uClinux.
config MTD_INTEL_VR_NOR
tristate "NOR flash on Intel Vermilion Range Expansion Bus CS0"
depends on PCI
help
Map driver for a NOR flash bank located on the Expansion Bus of the
Intel Vermilion Range chipset.
config MTD_RBTX4939
tristate "Map driver for RBTX4939 board"
depends on TOSHIBA_RBTX4939 && MTD_CFI && MTD_COMPLEX_MAPPINGS
help
Map driver for NOR flash chips on RBTX4939 board.
config MTD_PLATRAM
tristate "Map driver for platform device RAM (mtd-ram)"
select MTD_RAM
help
Map driver for RAM areas described via the platform device
system.
This selection automatically selects the map_ram driver.
config MTD_VMU
tristate "Map driver for Dreamcast VMU"
depends on MAPLE
help
This driver enables access to the Dreamcast Visual Memory Unit (VMU).
Most Dreamcast users will want to say Y here.
To build this as a module select M here, the module will be called
vmu-flash.
config MTD_PISMO
tristate "MTD discovery driver for PISMO modules"
depends on I2C
depends on ARCH_VERSATILE
help
This driver allows for discovery of PISMO modules - see
<http://www.pismoworld.org/>. These are small modules containing
up to five memory devices (eg, SRAM, flash, DOC) described by an
I2C EEPROM.
This driver does not create any MTD maps itself; instead it
creates MTD physmap and MTD SRAM platform devices. If you
enable this option, you should consider enabling MTD_PHYSMAP
and/or MTD_PLATRAM according to the devices on your module.
When built as a module, it will be called pismo.ko
endmenu
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