OMAP3: Add OMAP3 auto detection

[karo-tx-uboot.git] / include / fat.h

diff --git a/include/fat.h b/include/fat.h
index 6f0f40fa61e28f23f51f422aebb90ab796c97322..c8b94936209f1c204c20d0307875cd33836927a6 100644 (file)
--- 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;