OVMS3-idf/components/spi_flash/Kconfig
michael fdf983e0c4 spi: fix config break and reduce overhead of the bus lock on SPI1
The SPI bus lock on SPI1 introduces two side effects:

1. The device lock for the main flash requires the
`CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION` to be selected, however this
option is disabled by default in earlier IDF versions. Some developers
may find their project cannot be built by their old sdkconfig files.

2. Usually we don't need the lock on the SPI1 bus, due to it's
restrictions. However the overhead still exists in this case, the IRAM
cost for static version of semaphore functions, and the time cost when
getting and releasing the lock.

This commit:

1. Add a CONFIG_SPI_FLASH_BYPASS_MAIN_LOCK option, which will forbid the
space cost, as well as the initialization of the main bus lock.

2. When the option is not selected, the bus lock is used, the
`CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION` will be selected explicitly.

3. Revert default value of `CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION`
to `n`.

introduced in 49a48644e4.

Closes https://github.com/espressif/esp-idf/issues/5046
2020-04-22 16:06:13 +08:00

136 lines
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menu "SPI Flash driver"
config SPI_FLASH_VERIFY_WRITE
bool "Verify SPI flash writes"
default n
help
If this option is enabled, any time SPI flash is written then the data will be read
back and verified. This can catch hardware problems with SPI flash, or flash which
was not erased before verification.
config SPI_FLASH_LOG_FAILED_WRITE
bool "Log errors if verification fails"
depends on SPI_FLASH_VERIFY_WRITE
default n
help
If this option is enabled, if SPI flash write verification fails then a log error line
will be written with the address, expected & actual values. This can be useful when
debugging hardware SPI flash problems.
config SPI_FLASH_WARN_SETTING_ZERO_TO_ONE
bool "Log warning if writing zero bits to ones"
depends on SPI_FLASH_VERIFY_WRITE
default n
help
If this option is enabled, any SPI flash write which tries to set zero bits in the flash to
ones will log a warning. Such writes will not result in the requested data appearing identically
in flash once written, as SPI NOR flash can only set bits to one when an entire sector is erased.
After erasing, individual bits can only be written from one to zero.
Note that some software (such as SPIFFS) which is aware of SPI NOR flash may write one bits as an
optimisation, relying on the data in flash becoming a bitwise AND of the new data and any existing data.
Such software will log spurious warnings if this option is enabled.
config SPI_FLASH_ENABLE_COUNTERS
bool "Enable operation counters"
default 0
help
This option enables the following APIs:
- spi_flash_reset_counters
- spi_flash_dump_counters
- spi_flash_get_counters
These APIs may be used to collect performance data for spi_flash APIs
and to help understand behaviour of libraries which use SPI flash.
config SPI_FLASH_ROM_DRIVER_PATCH
bool "Enable SPI flash ROM driver patched functions"
default y
help
Enable this flag to use patched versions of SPI flash ROM driver functions.
This option is needed to write to flash on ESP32-D2WD, and any configuration
where external SPI flash is connected to non-default pins.
choice SPI_FLASH_DANGEROUS_WRITE
bool "Writing to dangerous flash regions"
default SPI_FLASH_DANGEROUS_WRITE_ABORTS
help
SPI flash APIs can optionally abort or return a failure code
if erasing or writing addresses that fall at the beginning
of flash (covering the bootloader and partition table) or that
overlap the app partition that contains the running app.
It is not recommended to ever write to these regions from an IDF app,
and this check prevents logic errors or corrupted firmware memory from
damaging these regions.
Note that this feature *does not* check calls to the esp_rom_xxx SPI flash
ROM functions. These functions should not be called directly from IDF
applications.
config SPI_FLASH_DANGEROUS_WRITE_ABORTS
bool "Aborts"
config SPI_FLASH_DANGEROUS_WRITE_FAILS
bool "Fails"
config SPI_FLASH_DANGEROUS_WRITE_ALLOWED
bool "Allowed"
endchoice
config SPI_FLASH_USE_LEGACY_IMPL
bool "Use the legacy implementation before IDF v4.0"
default n
help
The implementation of SPI flash has been greatly changed in IDF v4.0.
Enable this option to use the legacy implementation.
config SPI_FLASH_SHARE_SPI1_BUS
bool "Support other devices attached to SPI1 bus"
default n
# The bus lock on SPI1 is meaningless when the legacy implementation is used, or the SPI
# driver does not support SPI1.
depends on !SPI_FLASH_USE_LEGACY_IMPL && !IDF_TARGET_ESP32S2
select FREERTOS_SUPPORT_STATIC_ALLOCATION
help
Each SPI bus needs a lock for arbitration among devices. This allows multiple
devices on a same bus, but may reduce the speed of esp_flash driver access to the
main flash chip.
If you only need to use esp_flash driver to access the main flash chip, disable
this option, and the lock will be bypassed on SPI1 bus. Otherwise if extra devices
are needed to attach to SPI1 bus, enable this option.
menu "Auto-detect flash chips"
config SPI_FLASH_SUPPORT_ISSI_CHIP
bool "ISSI"
default y
help
Enable this to support auto detection of ISSI chips if chip vendor not directly
given by ``chip_drv`` member of the chip struct. This adds support for variant
chips, however will extend detecting time.
config SPI_FLASH_SUPPORT_MXIC_CHIP
bool "MXIC"
default y
help
Enable this to support auto detection of MXIC chips if chip vendor not directly
given by ``chip_drv`` member of the chip struct. This adds support for variant
chips, however will extend detecting time.
config SPI_FLASH_SUPPORT_GD_CHIP
bool "GigaDevice"
default y
help
Enable this to support auto detection of GD (GigaDevice) chips if chip vendor not
directly given by ``chip_drv`` member of the chip struct. If you are using Wrover
modules, please don't disable this, otherwise your flash may not work in 4-bit
mode.
This adds support for variant chips, however will extend detecting time and image
size. Note that the default chip driver supports the GD chips with product ID
60H.
endmenu #auto detect flash chips
endmenu