157 lines
3.8 KiB
Plaintext
157 lines
3.8 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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# MMC/SD-related platform capabilities
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config ARCH_HAVE_SDIO
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bool
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default n
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config ARCH_HAVE_SDIOWAIT_WRCOMPLETE
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bool
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default n
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config ARCH_HAVE_SDIO_PREFLIGHT
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bool
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default n
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menuconfig MMCSD
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bool "MMC/SD Driver Support"
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default n
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---help---
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Support for MMC/SD block drivers. MMC/SD block drivers based on
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SPI and SDIO/MCI interfaces are supported. See include/nuttx/mmcsd.h
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and include/nuttx/sdio.h for further information.
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if MMCSD
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config MMCSD_NSLOTS
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int "Number of MMC/SD slots"
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default 1
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---help---
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Number of MMC/SD slots supported by the
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driver. Default is one.
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config MMCSD_READONLY
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bool "Disable MMC/SD write access"
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default n
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---help---
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Provide read-only access. Default is
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Read/Write
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config MMCSD_MULTIBLOCK_LIMIT
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int "Max block count can read/write in single transfer"
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default 0
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---help---
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The max block can be handled in single transfer.
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Default to 0, means no limitation. Block count larger than this
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limit will be splited to multiple multi-block transfer. Set it to 1 will
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only use single-block transfer mode, and can be used to work around
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buggy SDIO drivers that cannot handle multiple block transfers.
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config MMCSD_MMCSUPPORT
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bool "MMC cards support"
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default y
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---help---
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Enable support for MMC cards
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config MMCSD_HAVE_CARDDETECT
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bool "MMC/SD card detect pin"
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default y
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---help---
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SDIO driver card present detection is supported.
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config MMCSD_HAVE_WRITEPROTECT
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bool "MMC/SD write protect pin"
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default y
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---help---
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SDIO driver write protection detection is supported.
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config MMCSD_SPI
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bool "MMC/SD SPI transfer support"
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default y
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depends on SPI
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if MMCSD_SPI
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config MMCSD_SPICLOCK
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int "MMC/SD maximum SPI clock"
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default 20000000
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depends on MMCSD_SPI
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---help---
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Maximum SPI clock to drive MMC/SD card.
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Default is 20MHz.
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config MMCSD_SPIMODE
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int "MMC/SD SPI mode"
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default 0
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---help---
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Should be mode 0. However, sometimes this is useful for experimenting.
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config MMCSD_IDMODE_CLOCK
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int "MMC/SD ID Mode SPI clock"
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default 400000
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depends on MMCSD_SPI
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---help---
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SPI clock identify MMC/SD card.
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Should be 400KHz or less.
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endif
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config SDIO_DMA
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bool
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default n
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config MMCSD_SDIO
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bool "MMC/SD SDIO transfer support"
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default n
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depends on ARCH_HAVE_SDIO
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if MMCSD_SDIO
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config SDIO_MUXBUS
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bool "SDIO bus share support"
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default n
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---help---
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Set this SDIO interface if the SDIO interface
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or hardware resources are shared with other drivers.
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config MMCSD_SDIOWAIT_WRCOMPLETE
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bool "Use D0 Busy to detect Write Complete"
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default n
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depends on ARCH_HAVE_SDIOWAIT_WRCOMPLETE
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---help---
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SDIO driver will use D0 Busy signalling to detect Write Complete.
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This option when selected, will enable the MMCSD driver to use the
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underlying SDIO drivers implementation of the SD specification's
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D0 Busy signalling to detect Write Complete. This will avoid
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potentially very long (600Ms+) busy waiting in the MMCSD driver.
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To implement D0 Busy signalling, the underlying driver must
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be capable of switching the D0 GPIO to be a rising edge sensitive
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interrupt pin. It must then, condition that pin to detect the rising edge
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on receipt of SDWAIT_WRCOMPLETE in the SDIO_WAITENABLE call and
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return it back to regular SDIO mode, when either the ISR fires or pin is
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found to be high in the SDIO_EVENTWAIT call.
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config SDIO_WIDTH_D1_ONLY
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bool "SDIO 1-bit transfer"
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default n
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---help---
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Select 1-bit transfer mode. Default:
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4-bit transfer mode.
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config SDIO_BLOCKSETUP
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bool "SDIO block setup"
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default n
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---help---
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Some hardware needs to be informed of the selected blocksize and the
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number of blocks. Others just work on the byte stream. This option
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enables the block setup method in the SDIO vtable.
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endif
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endif # MMCSD
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