mirror of https://gitee.com/openkylin/linux.git
240 lines
8.1 KiB
Plaintext
240 lines
8.1 KiB
Plaintext
menu "RAM/ROM/Flash chip drivers"
|
|
depends on MTD!=n
|
|
|
|
config MTD_CFI
|
|
tristate "Detect flash chips by Common Flash Interface (CFI) probe"
|
|
select MTD_GEN_PROBE
|
|
select MTD_CFI_UTIL
|
|
help
|
|
The Common Flash Interface specification was developed by Intel,
|
|
AMD and other flash manufactures that provides a universal method
|
|
for probing the capabilities of flash devices. If you wish to
|
|
support any device that is CFI-compliant, you need to enable this
|
|
option. Visit <http://www.amd.com/products/nvd/overview/cfi.html>
|
|
for more information on CFI.
|
|
|
|
config MTD_JEDECPROBE
|
|
tristate "Detect non-CFI AMD/JEDEC-compatible flash chips"
|
|
select MTD_GEN_PROBE
|
|
select MTD_CFI_UTIL
|
|
help
|
|
This option enables JEDEC-style probing of flash chips which are not
|
|
compatible with the Common Flash Interface, but will use the common
|
|
CFI-targeted flash drivers for any chips which are identified which
|
|
are in fact compatible in all but the probe method. This actually
|
|
covers most AMD/Fujitsu-compatible chips and also non-CFI
|
|
Intel chips.
|
|
|
|
config MTD_GEN_PROBE
|
|
tristate
|
|
|
|
config MTD_CFI_ADV_OPTIONS
|
|
bool "Flash chip driver advanced configuration options"
|
|
depends on MTD_GEN_PROBE
|
|
help
|
|
If you need to specify a specific endianness for access to flash
|
|
chips, or if you wish to reduce the size of the kernel by including
|
|
support for only specific arrangements of flash chips, say 'Y'. This
|
|
option does not directly affect the code, but will enable other
|
|
configuration options which allow you to do so.
|
|
|
|
If unsure, say 'N'.
|
|
|
|
choice
|
|
prompt "Flash cmd/query data swapping"
|
|
depends on MTD_CFI_ADV_OPTIONS
|
|
default MTD_CFI_NOSWAP
|
|
---help---
|
|
This option defines the way in which the CPU attempts to arrange
|
|
data bits when writing the 'magic' commands to the chips. Saying
|
|
'NO', which is the default when CONFIG_MTD_CFI_ADV_OPTIONS isn't
|
|
enabled, means that the CPU will not do any swapping; the chips
|
|
are expected to be wired to the CPU in 'host-endian' form.
|
|
Specific arrangements are possible with the BIG_ENDIAN_BYTE and
|
|
LITTLE_ENDIAN_BYTE, if the bytes are reversed.
|
|
|
|
config MTD_CFI_NOSWAP
|
|
bool "NO"
|
|
|
|
config MTD_CFI_BE_BYTE_SWAP
|
|
bool "BIG_ENDIAN_BYTE"
|
|
|
|
config MTD_CFI_LE_BYTE_SWAP
|
|
bool "LITTLE_ENDIAN_BYTE"
|
|
|
|
endchoice
|
|
|
|
config MTD_CFI_GEOMETRY
|
|
bool "Specific CFI Flash geometry selection"
|
|
depends on MTD_CFI_ADV_OPTIONS
|
|
select MTD_MAP_BANK_WIDTH_1 if !(MTD_MAP_BANK_WIDTH_2 || \
|
|
MTD_MAP_BANK_WIDTH_4 || MTD_MAP_BANK_WIDTH_8 || \
|
|
MTD_MAP_BANK_WIDTH_16 || MTD_MAP_BANK_WIDTH_32)
|
|
select MTD_CFI_I1 if !(MTD_CFI_I2 || MTD_CFI_I4 || MTD_CFI_I8)
|
|
help
|
|
This option does not affect the code directly, but will enable
|
|
some other configuration options which would allow you to reduce
|
|
the size of the kernel by including support for only certain
|
|
arrangements of CFI chips. If unsure, say 'N' and all options
|
|
which are supported by the current code will be enabled.
|
|
|
|
config MTD_MAP_BANK_WIDTH_1
|
|
bool "Support 8-bit buswidth" if MTD_CFI_GEOMETRY
|
|
default y
|
|
help
|
|
If you wish to support CFI devices on a physical bus which is
|
|
8 bits wide, say 'Y'.
|
|
|
|
config MTD_MAP_BANK_WIDTH_2
|
|
bool "Support 16-bit buswidth" if MTD_CFI_GEOMETRY
|
|
default y
|
|
help
|
|
If you wish to support CFI devices on a physical bus which is
|
|
16 bits wide, say 'Y'.
|
|
|
|
config MTD_MAP_BANK_WIDTH_4
|
|
bool "Support 32-bit buswidth" if MTD_CFI_GEOMETRY
|
|
default y
|
|
help
|
|
If you wish to support CFI devices on a physical bus which is
|
|
32 bits wide, say 'Y'.
|
|
|
|
config MTD_MAP_BANK_WIDTH_8
|
|
bool "Support 64-bit buswidth" if MTD_CFI_GEOMETRY
|
|
default n
|
|
help
|
|
If you wish to support CFI devices on a physical bus which is
|
|
64 bits wide, say 'Y'.
|
|
|
|
config MTD_MAP_BANK_WIDTH_16
|
|
bool "Support 128-bit buswidth" if MTD_CFI_GEOMETRY
|
|
default n
|
|
help
|
|
If you wish to support CFI devices on a physical bus which is
|
|
128 bits wide, say 'Y'.
|
|
|
|
config MTD_MAP_BANK_WIDTH_32
|
|
bool "Support 256-bit buswidth" if MTD_CFI_GEOMETRY
|
|
default n
|
|
help
|
|
If you wish to support CFI devices on a physical bus which is
|
|
256 bits wide, say 'Y'.
|
|
|
|
config MTD_CFI_I1
|
|
bool "Support 1-chip flash interleave" if MTD_CFI_GEOMETRY
|
|
default y
|
|
help
|
|
If your flash chips are not interleaved - i.e. you only have one
|
|
flash chip addressed by each bus cycle, then say 'Y'.
|
|
|
|
config MTD_CFI_I2
|
|
bool "Support 2-chip flash interleave" if MTD_CFI_GEOMETRY
|
|
default y
|
|
help
|
|
If your flash chips are interleaved in pairs - i.e. you have two
|
|
flash chips addressed by each bus cycle, then say 'Y'.
|
|
|
|
config MTD_CFI_I4
|
|
bool "Support 4-chip flash interleave" if MTD_CFI_GEOMETRY
|
|
default n
|
|
help
|
|
If your flash chips are interleaved in fours - i.e. you have four
|
|
flash chips addressed by each bus cycle, then say 'Y'.
|
|
|
|
config MTD_CFI_I8
|
|
bool "Support 8-chip flash interleave" if MTD_CFI_GEOMETRY
|
|
default n
|
|
help
|
|
If your flash chips are interleaved in eights - i.e. you have eight
|
|
flash chips addressed by each bus cycle, then say 'Y'.
|
|
|
|
config MTD_OTP
|
|
bool "Protection Registers aka one-time programmable (OTP) bits"
|
|
depends on MTD_CFI_ADV_OPTIONS
|
|
default n
|
|
help
|
|
This enables support for reading, writing and locking so called
|
|
"Protection Registers" present on some flash chips.
|
|
A subset of them are pre-programmed at the factory with a
|
|
unique set of values. The rest is user-programmable.
|
|
|
|
The user-programmable Protection Registers contain one-time
|
|
programmable (OTP) bits; when programmed, register bits cannot be
|
|
erased. Each Protection Register can be accessed multiple times to
|
|
program individual bits, as long as the register remains unlocked.
|
|
|
|
Each Protection Register has an associated Lock Register bit. When a
|
|
Lock Register bit is programmed, the associated Protection Register
|
|
can only be read; it can no longer be programmed. Additionally,
|
|
because the Lock Register bits themselves are OTP, when programmed,
|
|
Lock Register bits cannot be erased. Therefore, when a Protection
|
|
Register is locked, it cannot be unlocked.
|
|
|
|
This feature should therefore be used with extreme care. Any mistake
|
|
in the programming of OTP bits will waste them.
|
|
|
|
config MTD_CFI_INTELEXT
|
|
tristate "Support for CFI command set 0001 (Intel/Sharp chips)"
|
|
depends on MTD_GEN_PROBE
|
|
select MTD_CFI_UTIL
|
|
help
|
|
The Common Flash Interface defines a number of different command
|
|
sets which a CFI-compliant chip may claim to implement. This code
|
|
provides support for command set 0001, used on Intel StrataFlash
|
|
and other parts.
|
|
|
|
config MTD_CFI_AMDSTD
|
|
tristate "Support for CFI command set 0002 (AMD/Fujitsu/Spansion chips)"
|
|
depends on MTD_GEN_PROBE
|
|
select MTD_CFI_UTIL
|
|
help
|
|
The Common Flash Interface defines a number of different command
|
|
sets which a CFI-compliant chip may claim to implement. This code
|
|
provides support for command set 0002, used on chips including
|
|
the AMD Am29LV320.
|
|
|
|
config MTD_CFI_STAA
|
|
tristate "Support for CFI command set 0020 (ST (Advanced Architecture) chips)"
|
|
depends on MTD_GEN_PROBE
|
|
select MTD_CFI_UTIL
|
|
help
|
|
The Common Flash Interface defines a number of different command
|
|
sets which a CFI-compliant chip may claim to implement. This code
|
|
provides support for command set 0020.
|
|
|
|
config MTD_CFI_UTIL
|
|
tristate
|
|
|
|
config MTD_RAM
|
|
tristate "Support for RAM chips in bus mapping"
|
|
help
|
|
This option enables basic support for RAM chips accessed through
|
|
a bus mapping driver.
|
|
|
|
config MTD_ROM
|
|
tristate "Support for ROM chips in bus mapping"
|
|
help
|
|
This option enables basic support for ROM chips accessed through
|
|
a bus mapping driver.
|
|
|
|
config MTD_ABSENT
|
|
tristate "Support for absent chips in bus mapping"
|
|
help
|
|
This option enables support for a dummy probing driver used to
|
|
allocated placeholder MTD devices on systems that have socketed
|
|
or removable media. Use of this driver as a fallback chip probe
|
|
preserves the expected registration order of MTD device nodes on
|
|
the system regardless of media presence. Device nodes created
|
|
with this driver will return -ENODEV upon access.
|
|
|
|
config MTD_XIP
|
|
bool "XIP aware MTD support"
|
|
depends on !SMP && (MTD_CFI_INTELEXT || MTD_CFI_AMDSTD) && ARCH_MTD_XIP
|
|
default y if XIP_KERNEL
|
|
help
|
|
This allows MTD support to work with flash memory which is also
|
|
used for XIP purposes. If you're not sure what this is all about
|
|
then say N.
|
|
|
|
endmenu
|