incubator-nuttx/drivers/mmcsd/Kconfig

#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

# MMC/SD-related platform capabilities

config ARCH_HAVE_SDIO
	bool
	default n

config ARCH_HAVE_SDIOWAIT_WRCOMPLETE
	bool
	default n

config ARCH_HAVE_SDIO_PREFLIGHT
	bool
	default n

menuconfig MMCSD
	bool "MMC/SD Driver Support"
	default n
	---help---
		Support for MMC/SD block drivers.  MMC/SD block drivers based on
		SPI and SDIO/MCI interfaces are supported.  See include/nuttx/mmcsd.h
		and include/nuttx/sdio.h for further information.

if MMCSD

config MMCSD_IOCSUPPORT
	bool "Enable MMC/SD ioctl support"
	default y
	---help---
		Disable it to save some code size if required.

config MMCSD_NSLOTS
	int "Number of MMC/SD slots"
	default 1
	---help---
		Number of MMC/SD slots supported by the
		driver. Default is one.

config MMCSD_PROCFS
	bool "MMCSD proc fs support"
	default n
	depends on FS_PROCFS_REGISTER
	---help---
		Enable procfs for mmcsd.

config MMCSD_READONLY
	bool "Disable MMC/SD write access"
	default n
	---help---
		Provide read-only access.  Default is
		Read/Write

config MMCSD_MULTIBLOCK_LIMIT
	int "Max block count can read/write in single transfer"
	default 0
	---help---
		The max block can be handled in single transfer.
		Default to 0, means no limitation. Block count larger than this
		limit will be splited to multiple multi-block transfer. Set it to 1 will
		only use single-block transfer mode, and can be used to work around
		buggy SDIO drivers that cannot handle multiple block transfers.

config MMCSD_MMCSUPPORT
	bool "MMC cards support"
	default y
	---help---
		Enable support for MMC cards

config MMCSD_HAVE_CARDDETECT
	bool "MMC/SD card detect pin"
	default y
	---help---
		SDIO driver card present detection is supported.

config MMCSD_HAVE_WRITEPROTECT
	bool "MMC/SD write protect pin"
	default y
	---help---
		SDIO driver write protection detection is supported.

config MMCSD_SPI
	bool "MMC/SD SPI transfer support"
	default y
	depends on SPI

if MMCSD_SPI

config MMCSD_SPICLOCK
	int "MMC/SD maximum SPI clock"
	default 20000000
	depends on MMCSD_SPI
	---help---
		Maximum SPI clock to drive MMC/SD card.
		Default is 20MHz.

config MMCSD_SPIMODE
	int "MMC/SD SPI mode"
	default 0
	---help---
		Should be mode 0.  However, sometimes this is useful for experimenting.

config MMCSD_IDMODE_CLOCK
	int "MMC/SD ID Mode SPI clock"
	default 400000
	depends on MMCSD_SPI
	---help---
		SPI clock identify MMC/SD card.
		Should be 400KHz or less.

config MMCSD_SPIRETRY_COUNT
	int "MMC/SD read/write fail retry max count"
	default 0
	---help---
		Try to recovery MMCSD read/write fail.

endif

config SDIO_DMA
	bool
	default n

config MMCSD_SDIO
	bool "MMC/SD SDIO transfer support"
	default n
	depends on ARCH_HAVE_SDIO

if MMCSD_SDIO

config SDIO_MUXBUS
	bool "SDIO bus share support"
	default n
	---help---
		Set this SDIO interface if the SDIO interface
		or hardware resources are shared with other drivers.

config MMCSD_SDIOWAIT_WRCOMPLETE
	bool "Use D0 Busy to detect Write Complete"
	default n
	depends on ARCH_HAVE_SDIOWAIT_WRCOMPLETE
	---help---
		SDIO driver will use D0 Busy signalling to detect Write Complete.
		This option when selected, will enable the MMCSD driver to use the
		underlying SDIO drivers implementation of the SD specification's
		D0 Busy signalling to detect Write Complete.  This will avoid
		potentially very long (600Ms+) busy waiting in the MMCSD driver.

		To implement D0 Busy signalling, the underlying driver must
		be capable of switching the D0 GPIO to be a rising edge sensitive
		interrupt pin. It must then, condition that pin to detect the rising edge
		on receipt of SDWAIT_WRCOMPLETE in the SDIO_WAITENABLE call and
		return it back to regular SDIO mode, when either the ISR fires or pin is
		found to be high in the SDIO_EVENTWAIT call.

config SDIO_WIDTH_D1_ONLY
	bool "SDIO 1-bit transfer"
	default n
	---help---
		Select 1-bit transfer mode.  Default:
		4-bit transfer mode.

config SDIO_BLOCKSETUP
	bool "SDIO block setup"
	default n
	---help---
		Some hardware needs to be informed of the selected blocksize and the
		number of blocks.  Others just work on the byte stream.  This option
		enables the block setup method in the SDIO vtable.

config MMCSD_BLOCK_WDATADELAY
	int "The wait timeout to write one data block"
	default 260
	---help---
		Some hardware needs to configure this delay to write one data block, because
		the hardware needs more time for wear leveling and bad block management.

config MMCSD_CHECK_READY_STATUS_WITHOUT_SLEEP
	bool "No sleep in ready-check function."
	default n
	---help---
		Since nxsig_usleep returns at the tick after the next tick, when
		CONFIG_USEC_PER_TICK is big, the real sleep time is much more than
		desired in mmcsd_transferready(). As a result, write speed is
		affected seriously.

		When this configuration is enabled, the sleep in mmcsd_transferready
		will be skipped. However, CPU will be hogged by the process during
		this period of writing time.

endif

endif # MMCSD