X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Ffat.h;h=c8b94936209f1c204c20d0307875cd33836927a6;hb=fc4e188789b01dc9f18c80869c43fdd7d1a51378;hp=b56219ced8f3f3fa575afe9471e5b06df86c0024;hpb=71f9511803de65a3b98d2f592d418da1d1539f13;p=oweals%2Fu-boot.git

diff --git a/include/fat.h b/include/fat.h
index b56219ced8..c8b9493620 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -27,6 +27,8 @@
 #ifndef _FAT_H_
 #define _FAT_H_
 
+#include <asm/byteorder.h>
+
 #define CONFIG_SUPPORT_VFAT
 
 #define SECTOR_SIZE FS_BLOCK_SIZE
@@ -43,7 +45,7 @@
 
 #define FATBUFBLOCKS	6
 #define FATBUFSIZE	(FS_BLOCK_SIZE*FATBUFBLOCKS)
-#define FAT12BUFSIZE	((FATBUFSIZE*3)/2)
+#define FAT12BUFSIZE	((FATBUFSIZE*2)/3)
 #define FAT16BUFSIZE	(FATBUFSIZE/2)
 #define FAT32BUFSIZE	(FATBUFSIZE/4)
 
@@ -65,8 +67,12 @@
 #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
+ * dir entries
+ */
+#define LAST_LONG_ENTRY_MASK	0x40
 
 /* Flags telling whether we should read a file or list a directory */
 #define LS_NO	0
@@ -89,13 +95,13 @@
 #define FAT2CPU16	le16_to_cpu
 #define FAT2CPU32	le32_to_cpu
 #else
-#if 1
+#if __LITTLE_ENDIAN
 #define FAT2CPU16(x)	(x)
 #define FAT2CPU32(x)	(x)
 #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
@@ -105,7 +111,8 @@
 #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 */
@@ -169,15 +176,19 @@ typedef struct dir_slot {
 	__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[FATBUFSIZE]; /* Current FAT buffer */
 	int	fatsize;	/* Size of FAT in bits */
 	__u16	fatlength;	/* Length of FAT in sectors */
 	__u16	fat_sect;	/* Starting sector of the FAT */
 	__u16	rootdir_sect;	/* Start sector of root directory */
 	__u16	clust_size;	/* Size of clusters in sectors */
-	__u16	data_begin;	/* The sector of the first cluster */
-	__u8	fatbuf[FATBUFSIZE]; /* Current FAT buffer */
+	short	data_begin;	/* The sector of the first cluster, can be negative */
 	int	fatbufnum;	/* Used by get_fatent, init to -1 */
 } fsdata;
 
@@ -204,5 +215,6 @@ int file_fat_detectfs(void);
 int file_fat_ls(const char *dir);
 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);
 
 #endif /* _FAT_H_ */