mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-21 00:53:23 +00:00
303 lines
10 KiB
C
303 lines
10 KiB
C
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2017.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, distribute, and sell this
|
|
software and its documentation for any purpose is hereby granted
|
|
without fee, provided that the above copyright notice appear in
|
|
all copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of the author not be used in
|
|
advertising or publicity pertaining to distribution of the
|
|
software without specific, written prior permission.
|
|
|
|
The author disclaims all warranties with regard to this
|
|
software, including all implied warranties of merchantability
|
|
and fitness. In no event shall the author be liable for any
|
|
special, indirect or consequential damages or any damages
|
|
whatsoever resulting from loss of use, data or profits, whether
|
|
in an action of contract, negligence or other tortious action,
|
|
arising out of or in connection with the use or performance of
|
|
this software.
|
|
*/
|
|
|
|
#ifndef _VIRTUALFAT_H_
|
|
#define _VIRTUALFAT_H_
|
|
|
|
/* Includes: */
|
|
#include <avr/io.h>
|
|
#include <avr/pgmspace.h>
|
|
|
|
#include <LUFA/Drivers/USB/USB.h>
|
|
|
|
#include "../BootloaderAPI.h"
|
|
|
|
/* Macros: */
|
|
/** Size of the virtual FLASH.BIN file in bytes. */
|
|
#define FLASH_FILE_SIZE_BYTES (FLASHEND - (FLASHEND - BOOT_START_ADDR) - AUX_BOOT_SECTION_SIZE)
|
|
|
|
/** Size of the virtual EEPROM.BIN file in bytes. */
|
|
#define EEPROM_FILE_SIZE_BYTES E2END
|
|
|
|
/** Number of sectors that comprise a single logical disk cluster. */
|
|
#define SECTOR_PER_CLUSTER 4
|
|
|
|
/** Size of a single logical sector on the disk. */
|
|
#define SECTOR_SIZE_BYTES 512
|
|
|
|
/** Size of a logical cluster on the disk, in bytes */
|
|
#define CLUSTER_SIZE_BYTES (SECTOR_PER_CLUSTER * SECTOR_SIZE_BYTES)
|
|
|
|
/** Number of sectors required to store a given size in bytes.
|
|
*
|
|
* \param[in] size Size of the data that needs to be stored
|
|
*
|
|
* \return Number of sectors required to store the given data on the disk.
|
|
*/
|
|
#define FILE_SECTORS(size) ((size / SECTOR_SIZE_BYTES) + ((size % SECTOR_SIZE_BYTES) ? 1 : 0))
|
|
|
|
/** Number of clusters required to store a given size in bytes.
|
|
*
|
|
* \param[in] size Size of the data that needs to be stored
|
|
*
|
|
* \return Number of clusters required to store the given data on the disk.
|
|
*/
|
|
#define FILE_CLUSTERS(size) ((size / CLUSTER_SIZE_BYTES) + ((size % CLUSTER_SIZE_BYTES) ? 1 : 0))
|
|
|
|
/** Total number of logical sectors/blocks on the disk. */
|
|
#define LUN_MEDIA_BLOCKS (FILE_SECTORS(FLASH_FILE_SIZE_BYTES) + FILE_SECTORS(EEPROM_FILE_SIZE_BYTES) + 32)
|
|
|
|
/** Converts a given time in HH:MM:SS format to a FAT filesystem time.
|
|
*
|
|
* \note The minimum seconds resolution of FAT is 2, thus odd seconds
|
|
* will be truncated to the previous integer multiple of 2 seconds.
|
|
*
|
|
* \param[in] hh Hours (0-23)
|
|
* \param[in] mm Minutes (0-59)
|
|
* \param[in] ss Seconds (0-59)
|
|
*
|
|
* \return Given time encoded as a FAT filesystem timestamp
|
|
*/
|
|
#define FAT_TIME(hh, mm, ss) ((hh << 11) | (mm << 5) | (ss >> 1))
|
|
|
|
/** Converts a given date in DD/MM/YYYY format to a FAT filesystem date.
|
|
*
|
|
* \param[in] dd Days in the month (1-31)
|
|
* \param[in] mm Months in the year (1-12)
|
|
* \param[in] yyyy Year (1980 - 2107)
|
|
*
|
|
* \return Given date encoded as a FAT filesystem datestamp
|
|
*/
|
|
#define FAT_DATE(dd, mm, yyyy) (((yyyy - 1980) << 9) | (mm << 5) | (dd << 0))
|
|
|
|
/** Bit-rotates a given 8-bit value once to the right.
|
|
*
|
|
* \param[in] x Value to rotate right once
|
|
*
|
|
* \return Bit-rotated input value, rotated once to the right.
|
|
*/
|
|
#define ROT8(x) ((((x) & 0xFE) >> 1) | (((x) & 1) ? 0x80 : 0x00))
|
|
|
|
/** Computes the LFN entry checksum of a MSDOS 8.3 format file entry,
|
|
* to associate a LFN entry with its short file entry.
|
|
*
|
|
* \param[in] n0 MSDOS Filename character 1
|
|
* \param[in] n1 MSDOS Filename character 2
|
|
* \param[in] n2 MSDOS Filename character 3
|
|
* \param[in] n3 MSDOS Filename character 4
|
|
* \param[in] n4 MSDOS Filename character 5
|
|
* \param[in] n5 MSDOS Filename character 6
|
|
* \param[in] n6 MSDOS Filename character 7
|
|
* \param[in] n7 MSDOS Filename character 8
|
|
* \param[in] e0 MSDOS Extension character 1
|
|
* \param[in] e1 MSDOS Extension character 2
|
|
* \param[in] e2 MSDOS Extension character 3
|
|
*
|
|
* \return LFN checksum of the given MSDOS 8.3 filename.
|
|
*/
|
|
#define FAT_CHECKSUM(n0, n1, n2, n3, n4, n5, n6, n7, e0, e1, e2) \
|
|
(uint8_t)(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(ROT8(n0)+n1)+n2)+n3)+n4)+n5)+n6)+n7)+e0)+e1)+e2)
|
|
|
|
/** \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)
|
|
//@}
|
|
|
|
/* Enums: */
|
|
/** Enum for the Root FAT file entry indexes on the disk. This can be used
|
|
* to retrieve the current contents of a known directory entry.
|
|
*/
|
|
enum
|
|
{
|
|
/** Volume ID directory entry, giving the name of the virtual disk. */
|
|
DISK_FILE_ENTRY_VolumeID = 0,
|
|
/** Long File Name FAT file entry of the virtual FLASH.BIN image file. */
|
|
DISK_FILE_ENTRY_FLASH_LFN = 1,
|
|
/** Legacy MSDOS FAT file entry of the virtual FLASH.BIN image file. */
|
|
DISK_FILE_ENTRY_FLASH_MSDOS = 2,
|
|
/** Long File Name FAT file entry of the virtual EEPROM.BIN image file. */
|
|
DISK_FILE_ENTRY_EEPROM_LFN = 3,
|
|
/** Legacy MSDOS FAT file entry of the virtual EEPROM.BIN image file. */
|
|
DISK_FILE_ENTRY_EEPROM_MSDOS = 4,
|
|
};
|
|
|
|
/** Enum for the physical disk blocks of the virtual disk. */
|
|
enum
|
|
{
|
|
/** Boot sector disk block. */
|
|
DISK_BLOCK_BootBlock = 0,
|
|
/** First copy of the FAT table block. */
|
|
DISK_BLOCK_FATBlock1 = 1,
|
|
/** Second copy of the FAT table block. */
|
|
DISK_BLOCK_FATBlock2 = 2,
|
|
/** Root file and directory entries block. */
|
|
DISK_BLOCK_RootFilesBlock = 3,
|
|
/** Start block of the disk data section. */
|
|
DISK_BLOCK_DataStartBlock = 4,
|
|
};
|
|
|
|
/* Type Definitions: */
|
|
/** FAT boot block structure definition, used to identify the core
|
|
* parameters of a FAT file system stored on a disk.
|
|
*
|
|
* \note This definition is truncated to save space; the magic signature
|
|
* \c 0xAA55 must be appended to the very end of the block for it
|
|
* to be detected by the host as a valid boot block.
|
|
*/
|
|
typedef struct
|
|
{
|
|
uint8_t Bootstrap[3];
|
|
uint8_t Description[8];
|
|
uint16_t SectorSize;
|
|
uint8_t SectorsPerCluster;
|
|
uint16_t ReservedSectors;
|
|
uint8_t FATCopies;
|
|
uint16_t RootDirectoryEntries;
|
|
uint16_t TotalSectors16;
|
|
uint8_t MediaDescriptor;
|
|
uint16_t SectorsPerFAT;
|
|
uint16_t SectorsPerTrack;
|
|
uint16_t Heads;
|
|
uint32_t HiddenSectors;
|
|
uint32_t TotalSectors32;
|
|
uint16_t PhysicalDriveNum;
|
|
uint8_t ExtendedBootRecordSig;
|
|
uint32_t VolumeSerialNumber;
|
|
uint8_t VolumeLabel[11];
|
|
uint8_t FilesystemIdentifier[8];
|
|
/* uint8_t BootstrapProgram[448]; */
|
|
/* uint16_t MagicSignature; */
|
|
} FATBootBlock_t;
|
|
|
|
/** FAT directory entry structure, for the various kinds of File and
|
|
* directory descriptors on a FAT disk.
|
|
*/
|
|
typedef union
|
|
{
|
|
/** VFAT Long File Name file entry. */
|
|
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_LongFileName;
|
|
|
|
/** Legacy FAT MSDOS 8.3 file entry. */
|
|
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_File;
|
|
|
|
/** Legacy FAT MSDOS (sub-)directory entry. */
|
|
struct
|
|
{
|
|
uint8_t Name[11];
|
|
uint8_t Attributes;
|
|
uint8_t Reserved[10];
|
|
uint16_t CreationTime;
|
|
uint16_t CreationDate;
|
|
uint16_t StartingCluster;
|
|
uint32_t Reserved2;
|
|
} MSDOS_Directory;
|
|
} FATDirectoryEntry_t;
|
|
|
|
/* Function Prototypes: */
|
|
#if defined(INCLUDE_FROM_VIRTUAL_FAT_C)
|
|
static uint8_t ReadEEPROMByte(const uint8_t* const Address) ATTR_NO_INLINE;
|
|
|
|
static void WriteEEPROMByte(uint8_t* const Address,
|
|
const uint8_t Data) ATTR_NO_INLINE;
|
|
|
|
static void UpdateFAT12ClusterEntry(uint8_t* const FATTable,
|
|
const uint16_t Index,
|
|
const uint16_t ChainEntry) AUX_BOOT_SECTION;
|
|
|
|
static void UpdateFAT12ClusterChain(uint8_t* const FATTable,
|
|
const uint16_t StartIndex,
|
|
const uint8_t ChainLength) AUX_BOOT_SECTION;
|
|
|
|
static void ReadWriteFLASHFileBlock(const uint16_t BlockNumber,
|
|
uint8_t* BlockBuffer,
|
|
const bool Read) AUX_BOOT_SECTION;
|
|
|
|
static void ReadWriteEEPROMFileBlock(const uint16_t BlockNumber,
|
|
uint8_t* BlockBuffer,
|
|
const bool Read) AUX_BOOT_SECTION;
|
|
#endif
|
|
|
|
void VirtualFAT_WriteBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
|
|
void VirtualFAT_ReadBlock(const uint16_t BlockNumber) AUX_BOOT_SECTION;
|
|
|
|
#endif
|