+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
*
* 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
* 2003-03-10 - kharris@nexus-tech.net - ported to u-boot
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _FAT_H_
#define _FAT_H_
#include <asm/byteorder.h>
+#include <fs.h>
+
+struct disk_partition;
-#define CONFIG_SUPPORT_VFAT
/* Maximum Long File Name length supported here is 128 UTF-16 code units */
#define VFAT_MAXLEN_BYTES 256 /* Maximum LFN buffer in bytes */
#define VFAT_MAXSEQ 9 /* Up to 9 of 13 2-byte UTF-16 entries */
#define PREFETCH_BLOCKS 2
-#define MAX_CLUSTSIZE 65536
+#define MAX_CLUSTSIZE CONFIG_FS_FAT_MAX_CLUSTSIZE
+
#define DIRENTSPERBLOCK (mydata->sect_size / sizeof(dir_entry))
#define DIRENTSPERCLUST ((mydata->clust_size * mydata->sect_size) / \
sizeof(dir_entry))
#define FAT16BUFSIZE (FATBUFSIZE/2)
#define FAT32BUFSIZE (FATBUFSIZE/4)
+/* Maximum number of entry for long file name according to spec */
+#define MAX_LFN_SLOT 20
/* Filesystem identifiers */
#define FAT12_SIGN "FAT12 "
*/
#define LAST_LONG_ENTRY_MASK 0x40
-/* Flags telling whether we should read a file or list a directory */
-#define LS_NO 0
-#define LS_YES 1
-#define LS_DIR 1
-#define LS_ROOT 2
-
#define ISDIRDELIM(c) ((c) == '/' || (c) == '\\')
#define FSTYPE_NONE (-1)
#define START(dent) (FAT2CPU16((dent)->start) \
+ (mydata->fatsize != 32 ? 0 : \
(FAT2CPU16((dent)->starthi) << 16)))
+#define IS_LAST_CLUST(x, fatsize) ((x) >= ((fatsize) != 32 ? \
+ ((fatsize) != 16 ? 0xff8 : 0xfff8) : \
+ 0xffffff8))
#define CHECK_CLUST(x, fatsize) ((x) <= 1 || \
- (x) >= ((fatsize) != 32 ? 0xfff0 : 0xffffff0))
+ (x) >= ((fatsize) != 32 ? \
+ ((fatsize) != 16 ? 0xff0 : 0xfff0) : \
+ 0xffffff0))
typedef struct boot_sector {
__u8 ignored[3]; /* Bootstrap code */
/* Boot sign comes last, 2 bytes */
} volume_info;
+/* see dir_entry::lcase: */
+#define CASE_LOWER_BASE 8 /* base (name) is lower case */
+#define CASE_LOWER_EXT 16 /* extension is lower case */
+
typedef struct dir_entry {
char name[8],ext[3]; /* Name and extension */
__u8 attr; /* Attribute bits */
- __u8 lcase; /* Case for base and extension */
+ __u8 lcase; /* Case for name and ext (CASE_LOWER_x) */
__u8 ctime_ms; /* Creation time, milliseconds */
__u16 ctime; /* Creation time */
__u16 cdate; /* Creation date */
int fatsize; /* Size of FAT in bits */
__u32 fatlength; /* Length of FAT in sectors */
__u16 fat_sect; /* Starting sector of the FAT */
+ __u8 fat_dirty; /* Set if fatbuf has been modified */
__u32 rootdir_sect; /* Start sector of root directory */
__u16 sect_size; /* Size of sectors in bytes */
__u16 clust_size; /* Size of clusters in sectors */
int data_begin; /* The sector of the first cluster, can be negative */
int fatbufnum; /* Used by get_fatent, init to -1 */
+ int rootdir_size; /* Size of root dir for non-FAT32 */
+ __u32 root_cluster; /* First cluster of root dir for FAT32 */
+ u32 total_sect; /* Number of sectors */
+ int fats; /* Number of FATs */
} fsdata;
-typedef int (file_detectfs_func)(void);
-typedef int (file_ls_func)(const char *dir);
-typedef long (file_read_func)(const char *filename, void *buffer,
- unsigned long maxsize);
-
-struct filesystem {
- file_detectfs_func *detect;
- file_ls_func *ls;
- file_read_func *read;
- const char name[12];
-};
-
-/* FAT tables */
-file_detectfs_func file_fat_detectfs;
-file_ls_func file_fat_ls;
-file_read_func file_fat_read;
-
-/* Currently this doesn't check if the dir exists or is valid... */
-int file_cd(const char *path);
+static inline u32 clust_to_sect(fsdata *fsdata, u32 clust)
+{
+ return fsdata->data_begin + clust * fsdata->clust_size;
+}
+
+static inline u32 sect_to_clust(fsdata *fsdata, int sect)
+{
+ return (sect - fsdata->data_begin) / fsdata->clust_size;
+}
+
int file_fat_detectfs(void);
-int file_fat_ls(const char *dir);
int fat_exists(const char *filename);
-long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
- unsigned long maxsize);
-long file_fat_read(const char *filename, void *buffer, unsigned long maxsize);
-const char *file_getfsname(int idx);
-int fat_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
-int fat_register_device(block_dev_desc_t *dev_desc, int part_no);
-
-int file_fat_write(const char *filename, void *buffer, unsigned long maxsize);
-int fat_read_file(const char *filename, void *buf, int offset, int len);
+int fat_size(const char *filename, loff_t *size);
+int file_fat_read_at(const char *filename, loff_t pos, void *buffer,
+ loff_t maxsize, loff_t *actread);
+int file_fat_read(const char *filename, void *buffer, int maxsize);
+int fat_set_blk_dev(struct blk_desc *rbdd, struct disk_partition *info);
+int fat_register_device(struct blk_desc *dev_desc, int part_no);
+
+int file_fat_write(const char *filename, void *buf, loff_t offset, loff_t len,
+ loff_t *actwrite);
+int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
+ loff_t *actread);
+int fat_opendir(const char *filename, struct fs_dir_stream **dirsp);
+int fat_readdir(struct fs_dir_stream *dirs, struct fs_dirent **dentp);
+void fat_closedir(struct fs_dir_stream *dirs);
+int fat_unlink(const char *filename);
+int fat_mkdir(const char *dirname);
void fat_close(void);
#endif /* _FAT_H_ */
projects / oweals / u-boot.git / blobdiff