Merge pull request #17631 from benpicco/pkg/fatfs-non_tiny

pkg/fatfs_vfs: support FF_FS_TINY=0

pkg/fatfs/Makefile.include

@@ -1,6 +1,8 @@
 INCLUDES += -I$(PKGDIRBASE)
 INCLUDES += -I$(RIOTPKG)/fatfs/fatfs_diskio/mtd/include
 INCLUDES += -I$(RIOTPKG)/fatfs/vendor/include
+# native overwrites all INCLUDES
+NATIVEINCLUDES += -I$(RIOTPKG)/fatfs/vendor/include
 
 DIRS += $(RIOTBASE)/pkg/fatfs/fatfs_diskio/mtd
 

pkg/fatfs/doc.txt

@@ -4,4 +4,19 @@
  * @ingroup  sys_fs
  * @brief    Provides FAT file system support
  * @see      http://elm-chan.org/fsw/ff/00index_e.html
- */
+ */
+
+# Compile-Time options
+
+ - `FATFS_FFCONF_OPT_FS_READONLY`: This option switches read-only configuration.
+                                   Read-only configuration removes writing API functions.
+
+ - `FATFS_FFCONF_OPT_USE_FASTSEEK`: Enables faster seek at the cost of some per-fd RAM.
+
+ - `FATFS_FFCONF_OPT_FS_TINY`: Memory optimisations. Disabling this will increase FS performance
+                               at the cost of higher per-FD RAM usage (+512 byte/fd) as well as
+                               increased stack usage.
+
+ - `FATFS_FFCONF_OPT_FS_EXFAT`: enables support for exFAT
+
+ - `FATFS_FFCONF_OPT_USE_LFN`: enables support for long file names

pkg/fatfs/fatfs_vfs/fatfs_vfs.c

@@ -87,6 +87,11 @@ static int _format(vfs_mount_t *mountp)
     }
 #endif
 
+    /* make sure the volume has been initialized */
+    if (_init(mountp)) {
+        return -EINVAL;
+    }
+
     const MKFS_PARM param = {
         .fmt = CONFIG_FATFS_FORMAT_TYPE,
     };

sys/include/vfs.h

@@ -98,8 +98,22 @@ extern "C" {
  * @{
  */
 #ifdef MODULE_FATFS_VFS
+#include "ffconf.h"
+
+#if FF_FS_TINY
+#define _FATFS_FILE_CACHE               (0)
+#else
+#define _FATFS_FILE_CACHE               FF_MAX_SS
+#endif
+
+#if FF_USE_FASTSEEK
+#define _FATFS_FILE_SEEK_PTR             (4)
+#else
+#define _FATFS_FILE_SEEK_PTR             (0)
+#endif
+
 #define FATFS_VFS_DIR_BUFFER_SIZE       (44)
-#define FATFS_VFS_FILE_BUFFER_SIZE      (72)
+#define FATFS_VFS_FILE_BUFFER_SIZE      (72 + _FATFS_FILE_CACHE + _FATFS_FILE_SEEK_PTR)
 #else
 #define FATFS_VFS_DIR_BUFFER_SIZE       (1)
 #define FATFS_VFS_FILE_BUFFER_SIZE      (1)