# 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_EXFAT
	bool "Enable 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 "Enable 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
	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 if FS_FATFS_LFN
	default 1
	help
	  Valid code page values:
	  1   - ASCII (No extended character. Non-LFN cfg. only)
	  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)

endmenu

endif # FAT_FILESYSTEM_ELM