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Add Long File Name (VFAT) entry to the Mass Storage class bootloader, so that systems such as Linux that load a VFAT filesystem driver instead of the legacy MSDOS filesystem do not corrupt the volume by trying to write a LFN entry.

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This commit is contained in:
Dean Camera 2013-03-25 20:58:33 +00:00
parent 654217548b
commit 169f21fbb1
2 changed files with 114 additions and 27 deletions
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70
Bootloaders/MassStorage/Lib/VirtualFAT.h
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@ -94,6 +94,33 @@
*/
#define FAT_DATE(dd, mm, yyyy) (((yyyy - 1980) << 9) | (mm << 5) | (dd << 0))
/** \name FAT Filesystem Flags */
//@{
/** FAT attribute flag to indicate a read-only file. */
#define FAT_FLAG_READONLY (1 << 0)
/** FAT attribute flag to indicate a hidden file. */
#define FAT_FLAG_HIDDEN (1 << 1)
/** FAT attribute flag to indicate a system file. */
#define FAT_FLAG_SYSTEM (1 << 2)
/** FAT attribute flag to indicate a Volume name entry. */
#define FAT_FLAG_VOLUME_NAME (1 << 3)
/** FAT attribute flag to indicate a directory entry. */
#define FAT_FLAG_DIRECTORY (1 << 4)
/** FAT attribute flag to indicate a file ready for archiving. */
#define FAT_FLAG_ARCHIVE (1 << 5)
/** FAT pseudo-attribute flag to indicate a Long File Name entry. */
#define FAT_FLAG_LONG_FILE_NAME 0x0F
/** Ordinal flag marker for FAT Long File Name entries to mark the last entry. */
#define FAT_ORDINAL_LAST_ENTRY (1 << 6)
//@}
/* Type Definitions: */
/** FAT boot block structure definition, used to identify the core
* parameters of a FAT filesystem stored on a disk.
@ -130,16 +157,41 @@
/** FAT legacy 8.3 style directory entry structure definition, used to
* identify the files and folders of FAT filesystem stored on a disk.
*/
typedef struct
typedef union
{
uint8_t Filename[8];
uint8_t Extension[3];
uint8_t Attributes;
uint8_t Reserved[10];
uint16_t CreationTime;
uint16_t CreationDate;
uint16_t StartingCluster;
uint32_t FileSizeBytes;
struct
{
uint8_t Ordinal;
uint16_t Unicode1;
uint16_t Unicode2;
uint16_t Unicode3;
uint16_t Unicode4;
uint16_t Unicode5;
uint8_t Attribute;
uint8_t Reserved1;
uint8_t Checksum;
uint16_t Unicode6;
uint16_t Unicode7;
uint16_t Unicode8;
uint16_t Unicode9;
uint16_t Unicode10;
uint16_t Unicode11;
uint16_t Reserved2;
uint16_t Unicode12;
uint16_t Unicode13;
} VFAT;
struct
{
uint8_t Filename[8];
uint8_t Extension[3];
uint8_t Attributes;
uint8_t Reserved[10];
uint16_t CreationTime;
uint16_t CreationDate;
uint16_t StartingCluster;
uint32_t FileSizeBytes;
} MSDOS;
} FATDirectoryEntry_t;
/* Function Prototypes: */