X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=include%2Ffat.h;h=f1b4a0d97c3be48af96c00eb9720ee10c251afd2;hb=1ee6d31ff4a0cff3176f722ead734f31e58d0c26;hp=13910f984a226d71d80178a736d34d5aee854829;hpb=2d1a537d87727907bf4d888760cba4abc0b52ad3;p=karo-tx-uboot.git

diff --git a/include/fat.h b/include/fat.h
index 13910f984a..f1b4a0d97c 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -27,22 +27,21 @@
 #ifndef _FAT_H_
 #define _FAT_H_
 
-#define CONFIG_SUPPORT_VFAT
-
-#define SECTOR_SIZE FS_BLOCK_SIZE
+#include <asm/byteorder.h>
 
-#define FS_BLOCK_SIZE 512
-
-#if FS_BLOCK_SIZE != SECTOR_SIZE
-#error FS_BLOCK_SIZE != SECTOR_SIZE - This code needs to be fixed!
-#endif
+#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 DIRENTSPERBLOCK	(FS_BLOCK_SIZE/sizeof(dir_entry))
-#define DIRENTSPERCLUST	((mydata->clust_size*SECTOR_SIZE)/sizeof(dir_entry))
+#define DIRENTSPERBLOCK	(mydata->sect_size / sizeof(dir_entry))
+#define DIRENTSPERCLUST	((mydata->clust_size * mydata->sect_size) / \
+			 sizeof(dir_entry))
 
 #define FATBUFBLOCKS	6
-#define FATBUFSIZE	(FS_BLOCK_SIZE*FATBUFBLOCKS)
+#define FATBUFSIZE	(mydata->sect_size * FATBUFBLOCKS)
 #define FAT12BUFSIZE	((FATBUFSIZE*2)/3)
 #define FAT16BUFSIZE	(FATBUFSIZE/2)
 #define FAT32BUFSIZE	(FATBUFSIZE/4)
@@ -55,37 +54,31 @@
 #define SIGNLEN		8
 
 /* File attributes */
-#define ATTR_RO      1
-#define ATTR_HIDDEN  2
-#define ATTR_SYS     4
-#define ATTR_VOLUME  8
-#define ATTR_DIR     16
-#define ATTR_ARCH    32
+#define ATTR_RO	1
+#define ATTR_HIDDEN	2
+#define ATTR_SYS	4
+#define ATTR_VOLUME	8
+#define ATTR_DIR	16
+#define ATTR_ARCH	32
 
-#define ATTR_VFAT     (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
+#define ATTR_VFAT	(ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
 
 #define DELETED_FLAG	((char)0xe5) /* Marks deleted files when in name[0] */
-#define aRING		0x05	     /* Used to represent 'å' in name[0] */
+#define aRING		0x05	     /* Used as special character in name[0] */
 
-/* Indicates that the entry is the last long entry in a set of long
+/*
+ * Indicates that the entry is the last long entry in a set of long
  * dir entries
  */
 #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 LS_NO		0
+#define LS_YES		1
+#define LS_DIR		1
+#define LS_ROOT		2
 
-#ifdef DEBUG
-#define FAT_DPRINT(args...)	printf(args)
-#else
-#define FAT_DPRINT(args...)
-#endif
-#define FAT_ERROR(arg)		printf(arg)
-
-#define ISDIRDELIM(c)   ((c) == '/' || (c) == '\\')
+#define ISDIRDELIM(c)	((c) == '/' || (c) == '\\')
 
 #define FSTYPE_NONE	(-1)
 
@@ -99,17 +92,20 @@
 #else
 #define FAT2CPU16(x)	((((x) & 0x00ff) << 8) | (((x) & 0xff00) >> 8))
 #define FAT2CPU32(x)	((((x) & 0x000000ff) << 24)  |	\
-	 		 (((x) & 0x0000ff00) << 8)  |	\
+			 (((x) & 0x0000ff00) << 8)  |	\
 			 (((x) & 0x00ff0000) >> 8)  |	\
 			 (((x) & 0xff000000) >> 24))
 #endif
 #endif
 
 #define TOLOWER(c)	if((c) >= 'A' && (c) <= 'Z'){(c)+=('a' - 'A');}
+#define TOUPPER(c)	if ((c) >= 'a' && (c) <= 'z') \
+				(c) -= ('a' - 'A');
 #define START(dent)	(FAT2CPU16((dent)->start) \
 			+ (mydata->fatsize != 32 ? 0 : \
 			  (FAT2CPU16((dent)->starthi) << 16)))
-
+#define CHECK_CLUST(x, fatsize) ((x) <= 1 || \
+				(x) >= ((fatsize) != 32 ? 0xfff0 : 0xffffff0))
 
 typedef struct boot_sector {
 	__u8	ignored[3];	/* Bootstrap code */
@@ -163,25 +159,31 @@ typedef struct dir_entry {
 } dir_entry;
 
 typedef struct dir_slot {
-	__u8    id;		/* Sequence number for slot */
-	__u8    name0_4[10];	/* First 5 characters in name */
-	__u8    attr;		/* Attribute byte */
-	__u8    reserved;	/* Unused */
-	__u8    alias_checksum;/* Checksum for 8.3 alias */
-	__u8    name5_10[12];	/* 6 more characters in name */
-	__u16   start;		/* Unused */
-	__u8    name11_12[4];	/* Last 2 characters in name */
+	__u8	id;		/* Sequence number for slot */
+	__u8	name0_4[10];	/* First 5 characters in name */
+	__u8	attr;		/* Attribute byte */
+	__u8	reserved;	/* Unused */
+	__u8	alias_checksum;/* Checksum for 8.3 alias */
+	__u8	name5_10[12];	/* 6 more characters in name */
+	__u16	start;		/* Unused */
+	__u8	name11_12[4];	/* Last 2 characters in name */
 } dir_slot;
 
-/* Private filesystem parameters */
+/*
+ * Private filesystem parameters
+ *
+ * Note: FAT buffer has to be 32 bit aligned
+ * (see FAT32 accesses)
+ */
 typedef struct {
+	__u8	*fatbuf;	/* Current FAT buffer */
 	int	fatsize;	/* Size of FAT in bits */
-	__u16	fatlength;	/* Length of FAT in sectors */
+	__u32	fatlength;	/* Length of FAT in sectors */
 	__u16	fat_sect;	/* Starting sector of the FAT */
-	__u16	rootdir_sect;	/* Start sector of root directory */
+	__u32	rootdir_sect;	/* Start sector of root directory */
+	__u16	sect_size;	/* Size of sectors in bytes */
 	__u16	clust_size;	/* Size of clusters in sectors */
-	short	data_begin;	/* The sector of the first cluster, can be negative */
-	__u8	fatbuf[FATBUFSIZE]; /* Current FAT buffer */
+	int	data_begin;	/* The sector of the first cluster, can be negative */
 	int	fatbufnum;	/* Used by get_fatent, init to -1 */
 } fsdata;
 
@@ -191,10 +193,10 @@ 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];
+	file_detectfs_func	*detect;
+	file_ls_func		*ls;
+	file_read_func		*read;
+	const char		name[12];
 };
 
 /* FAT tables */
@@ -210,4 +212,5 @@ long file_fat_read(const char *filename, void *buffer, unsigned long maxsize);
 const char *file_getfsname(int idx);
 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);
 #endif /* _FAT_H_ */