# Copyright (c) 2016 Intel Corporation
# Copyright (c) 2020 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0

config FAT_FILESYSTEM_ELM
	bool "ELM FAT file system support"
	depends on FILE_SYSTEM
	select DISK_ACCESS
	help
	  Use the ELM FAT File system implementation.

if FAT_FILESYSTEM_ELM

menu "ELM FAT file system settings"
	visible if FAT_FILESYSTEM_ELM

config FS_FATFS_READ_ONLY
	bool "Read-only support for all volumes"
	help
	  The option excludes write code from ELM FAT file system driver;
	  when selected, it no longer will be possible to write data on
	  the FAT FS.
	  If write support is not needed, enabling this flag will slightly
	  reduce application size.
	  This option translates to _FS_READONLY within ELM FAT file system
	  driver; it enables exclusion, from compilation, of write supporting
	  code.

config FS_FATFS_MKFS
	bool
	help
	  This option translates to _USE_MKFS within ELM FAT file system
	  driver; it enables additional code that is required for formatting
	  volumes to ELM FAT.

config FS_FATFS_MOUNT_MKFS
	bool "Allow formatting volume when mounting fails"
	default y
	select FS_FATFS_MKFS
	help
	  This option adds code that allows fs_mount to attempt to format
	  a volume if no file system is found.
	  If formatting is not needed, disabling this flag will slightly
	  reduce application size.

if FS_FATFS_MOUNT_MKFS

config FS_FATFS_MAX_ROOT_ENTRIES
	int "Max number of entries in FAT FS root directory"
	default 512
	range 1 32768
	help
	  Sets how many root directory entries will be allocated when
	  formatting new FAT system to a device.
	  Note that this should be multiply of FS_FATFS_MAX_SS / 32.

endif # FS_FATFS_MOUNT_MKFS

config FS_FATFS_EXFAT
	bool "ExFAT support"
	select FS_FATFS_LFN
	help
	  Enable the exFAT format support for FatFs.

config FS_FATFS_NUM_FILES
	int "Maximum number of opened files"
	default 4

config FS_FATFS_NUM_DIRS
	int "Maximum number of opened directories"
	default 4

config FS_FATFS_LFN
	bool "Long filenames (LFN)"
	help
	  Without long filenames enabled, file names are limited to 8.3 format.
	  This option increases working buffer size.

if FS_FATFS_LFN

choice FS_FATFS_LFN_MODE
	prompt "LFN memory mode"
	default FS_FATFS_LFN_MODE_BSS

config FS_FATFS_LFN_MODE_BSS
	bool "Static buffer"
	help
	  Enable LFN with static working buffer on the BSS. Always NOT thread-safe.

config FS_FATFS_LFN_MODE_STACK
	bool "Stack buffer"
	help
	  Enable LFN with dynamic working buffer on the STACK.

config FS_FATFS_LFN_MODE_HEAP
	bool "Heap buffer"
	help
	  Enable LFN with dynamic working buffer on the HEAP.

endchoice

config FS_FATFS_MAX_LFN
	int "Max filename length"
	range 12 255
	default 255
	help
	  The working buffer occupies (FS_FATFS_MAX_LFN + 1) * 2 bytes and
	  additional 608 bytes at exFAT enabled.
	  It should be set 255 to support full featured LFN operations.

endif # FS_FATFS_LFN

config FS_FATFS_CODEPAGE
	int "FatFS code page (character set)"
	default 437
	help
	  Valid code page values:
	  437 - U.S.
	  720 - Arabic
	  737 - Greek
	  771 - KBL
	  775 - Baltic
	  850 - Latin 1
	  852 - Latin 2
	  855 - Cyrillic
	  857 - Turkish
	  860 - Portuguese
	  861 - Icelandic
	  862 - Hebrew
	  863 - Canadian French
	  864 - Arabic
	  865 - Nordic
	  866 - Russian
	  869 - Greek 2
	  932 - Japanese (DBCS)
	  936 - Simplified Chinese (DBCS)
	  949 - Korean (DBCS)
	  950 - Traditional Chinese (DBCS)

config FS_FATFS_MAX_SS
	int "Maximum supported sector size"
	range 512 4096
	default 512

config FS_FATFS_WINDOW_ALIGNMENT
	int "Memory alignment for the member \"win\" in FATFS"
	default 1
	help
	  Specifies alignment, in bytes of FAT FS window buffer that is
	  used for device's read/write operations. MMC controllers may
	  require read/write buffer to start at memory address with
	  specific alignment, for example 16 or 512 bytes, the value
	  provided here is used as such alignment. Note that the window
	  buffer is internal element of FATFS structure, which means
	  that, in worst scenario, value provided here may cause FATFS
	  structure to have size of twice the value

endmenu

endif # FAT_FILESYSTEM_ELM