projects / pub / USBasp.git / blobdiff
? search:
summary | shortlog | log | commit | commitdiff | tree
raw | inline | side by side
Update Studio Integration DLL, to include package logging.
[pub/USBasp.git] / Bootloaders / MassStorage / Lib / VirtualFAT.c
diff --git a/Bootloaders/MassStorage/Lib/VirtualFAT.c b/Bootloaders/MassStorage/Lib/VirtualFAT.c
index 569b754..63d4ea0 100644 (file)
--- a/Bootloaders/MassStorage/Lib/VirtualFAT.c
+++ b/Bootloaders/MassStorage/Lib/VirtualFAT.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
 /*
              LUFA Library
-     Copyright (C) Dean Camera, 2013.
+     Copyright (C) Dean Camera, 2015.
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
-  Copyright 2013  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2015  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
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
@@ -95,60 +95,145 @@ static FATDirectoryEntry_t FirmwareFileEntries[] =
                /* VFAT Long File Name entry for the virtual firmware file; required to
                 * prevent corruption from systems that are unable to detect the device
                 * as being a legacy MSDOS style FAT12 volume. */
                /* VFAT Long File Name entry for the virtual firmware file; required to
                 * prevent corruption from systems that are unable to detect the device
                 * as being a legacy MSDOS style FAT12 volume. */
-               [DISK_FILE_ENTRY_FirmwareLFN] =
+               [DISK_FILE_ENTRY_FLASH_LFN] =
                {
                        .VFAT_LongFileName =
                                {
                {
                        .VFAT_LongFileName =
                                {
-                                       .Ordinal         = FAT_ORDINAL_LAST_ENTRY | 1,
+                                       .Ordinal         = 1 | FAT_ORDINAL_LAST_ENTRY,
                                        .Attribute       = FAT_FLAG_LONG_FILE_NAME,
                                        .Reserved1       = 0,
                                        .Reserved2       = 0,
 
                                        .Attribute       = FAT_FLAG_LONG_FILE_NAME,
                                        .Reserved1       = 0,
                                        .Reserved2       = 0,
 
-                                       .Checksum        = 0x57,
+                                       .Checksum        = FAT_CHECKSUM('F','L','A','S','H',' ',' ',' ','B','I','N'),
 
                                        .Unicode1        = 'F',
 
                                        .Unicode1        = 'F',
-                                       .Unicode2        = 'I',
-                                       .Unicode3        = 'R',
-                                       .Unicode4        = 'M',
-                                       .Unicode5        = 'W',
-                                       .Unicode6        = 'A',
-                                       .Unicode7        = 'R',
-                                       .Unicode8        = 'E',
-                                       .Unicode9        = '.',
-                                       .Unicode10       = 'B',
-                                       .Unicode11       = 'I',
-                                       .Unicode12       = 'N',
+                                       .Unicode2        = 'L',
+                                       .Unicode3        = 'A',
+                                       .Unicode4        = 'S',
+                                       .Unicode5        = 'H',
+                                       .Unicode6        = '.',
+                                       .Unicode7        = 'B',
+                                       .Unicode8        = 'I',
+                                       .Unicode9        = 'N',
+                                       .Unicode10       = 0,
+                                       .Unicode11       = 0,
+                                       .Unicode12       = 0,
                                        .Unicode13       = 0,
                                }
                },
 
                /* MSDOS file entry for the virtual Firmware image. */
                                        .Unicode13       = 0,
                                }
                },
 
                /* MSDOS file entry for the virtual Firmware image. */
-               [DISK_FILE_ENTRY_FirmwareMSDOS] =
+               [DISK_FILE_ENTRY_FLASH_MSDOS] =
                {
                        .MSDOS_File =
                                {
                {
                        .MSDOS_File =
                                {
-                                       .Filename        = "FIRMWARE",
+                                       .Filename        = "FLASH   ",
                                        .Extension       = "BIN",
                                        .Attributes      = 0,
                                        .Reserved        = {0},
                                        .CreationTime    = FAT_TIME(1, 1, 0),
                                        .CreationDate    = FAT_DATE(14, 2, 1989),
                                        .StartingCluster = 2,
                                        .Extension       = "BIN",
                                        .Attributes      = 0,
                                        .Reserved        = {0},
                                        .CreationTime    = FAT_TIME(1, 1, 0),
                                        .CreationDate    = FAT_DATE(14, 2, 1989),
                                        .StartingCluster = 2,
-                                       .FileSizeBytes   = FIRMWARE_FILE_SIZE_BYTES,
+                                       .FileSizeBytes   = FLASH_FILE_SIZE_BYTES,
+                               }
+               },
+
+               [DISK_FILE_ENTRY_EEPROM_LFN] =
+               {
+                       .VFAT_LongFileName =
+                               {
+                                       .Ordinal         = 1 | FAT_ORDINAL_LAST_ENTRY,
+                                       .Attribute       = FAT_FLAG_LONG_FILE_NAME,
+                                       .Reserved1       = 0,
+                                       .Reserved2       = 0,
+
+                                       .Checksum        = FAT_CHECKSUM('E','E','P','R','O','M',' ',' ','B','I','N'),
+
+                                       .Unicode1        = 'E',
+                                       .Unicode2        = 'E',
+                                       .Unicode3        = 'P',
+                                       .Unicode4        = 'R',
+                                       .Unicode5        = 'O',
+                                       .Unicode6        = 'M',
+                                       .Unicode7        = '.',
+                                       .Unicode8        = 'B',
+                                       .Unicode9        = 'I',
+                                       .Unicode10       = 'N',
+                                       .Unicode11       = 0,
+                                       .Unicode12       = 0,
+                                       .Unicode13       = 0,
+                               }
+               },
+
+               [DISK_FILE_ENTRY_EEPROM_MSDOS] =
+               {
+                       .MSDOS_File =
+                               {
+                                       .Filename        = "EEPROM  ",
+                                       .Extension       = "BIN",
+                                       .Attributes      = 0,
+                                       .Reserved        = {0},
+                                       .CreationTime    = FAT_TIME(1, 1, 0),
+                                       .CreationDate    = FAT_DATE(14, 2, 1989),
+                                       .StartingCluster = 2 + FILE_CLUSTERS(FLASH_FILE_SIZE_BYTES),
+                                       .FileSizeBytes   = EEPROM_FILE_SIZE_BYTES,
                                }
                },
        };
 
                                }
                },
        };
 
-/** Starting block of the virtual firmware file image on disk. On Windows, files
- *  are (usually?) replaced using the original file's physical sectors. On Linux
- *  file replacements are performed with an offset.
+/** Starting cluster of the virtual FLASH.BIN file on disk, tracked so that the
+ *  offset from the start of the data sector can be determined. On Windows
+ *  systems files are usually replaced using the original file's disk clusters,
+ *  while Linux appears to overwrite with an offset which must be compensated for.
  */
  */
-static uint16_t FileStartBlock = DISK_BLOCK_DataStartBlock;
+static const uint16_t* FLASHFileStartCluster  = &FirmwareFileEntries[DISK_FILE_ENTRY_FLASH_MSDOS].MSDOS_File.StartingCluster;
 
 
+/** Starting cluster of the virtual EEPROM.BIN file on disk, tracked so that the
+ *  offset from the start of the data sector can be determined. On Windows
+ *  systems files are usually replaced using the original file's disk clusters,
+ *  while Linux appears to overwrite with an offset which must be compensated for.
+ */
+static const uint16_t* EEPROMFileStartCluster = &FirmwareFileEntries[DISK_FILE_ENTRY_EEPROM_MSDOS].MSDOS_File.StartingCluster;
+
+/** Reads a byte of EEPROM out from the EEPROM memory space.
+ *
+ *  \note This function is required as the avr-libc EEPROM functions do not cope
+ *        with linker relaxations, and a jump longer than 4K of FLASH on the
+ *        larger USB AVRs will break the linker. This function is marked as
+ *        never inlinable and placed into the normal text segment so that the
+ *        call to the EEPROM function will be short even if the AUX boot section
+ *        is used.
+ *
+ *  \param[in]  Address   Address of the EEPROM location to read from
+ *
+ *  \return Read byte of EEPROM data.
+ */
+static uint8_t ReadEEPROMByte(const uint8_t* const Address)
+{
+       return eeprom_read_byte(Address);
+}
+
+/** Writes a byte of EEPROM out to the EEPROM memory space.
+ *
+ *  \note This function is required as the avr-libc EEPROM functions do not cope
+ *        with linker relaxations, and a jump longer than 4K of FLASH on the
+ *        larger USB AVRs will break the linker. This function is marked as
+ *        never inlinable and placed into the normal text segment so that the
+ *        call to the EEPROM function will be short even if the AUX boot section
+ *        is used.
+ *
+ *  \param[in]  Address   Address of the EEPROM location to write to
+ *  \param[in]  Data      New data to write to the EEPROM location
+ */
+static void WriteEEPROMByte(uint8_t* const Address,
+                            const uint8_t Data)
+{
+        eeprom_update_byte(Address, Data);
+}
 
 /** Updates a FAT12 cluster entry in the FAT file table with the specified next
  *  chain index. If the cluster is the last in the file chain, the magic value
 
 /** Updates a FAT12 cluster entry in the FAT file table with the specified next
  *  chain index. If the cluster is the last in the file chain, the magic value
- *  0xFFF is used.
+ *  \c 0xFFF should be used.
  *
  *  \note FAT data cluster indexes are offset by 2, so that cluster 2 is the
  *        first file data cluster on the disk. See the FAT specification.
  *
  *  \note FAT data cluster indexes are offset by 2, so that cluster 2 is the
  *        first file data cluster on the disk. See the FAT specification.
@@ -179,22 +264,52 @@ static void UpdateFAT12ClusterEntry(uint8_t* const FATTable,
        }
 }
 
        }
 }
 
+/** Updates a FAT12 cluster chain in the FAT file table with a linear chain of
+ *  the specified length.
+ *
+ *  \note FAT data cluster indexes are offset by 2, so that cluster 2 is the
+ *        first file data cluster on the disk. See the FAT specification.
+ *
+ *  \param[out]  FATTable     Pointer to the FAT12 allocation table
+ *  \param[in]   Index        Index of the start of the cluster chain to update
+ *  \param[in]   ChainLength  Length of the chain to write, in clusters
+ */
+static void UpdateFAT12ClusterChain(uint8_t* const FATTable,
+                                    const uint16_t Index,
+                                    const uint8_t ChainLength)
+{
+       for (uint8_t i = 0; i < ChainLength; i++)
+       {
+               uint16_t CurrentCluster = Index + i;
+               uint16_t NextCluster    = CurrentCluster + 1;
+
+               /* Mark last cluster as end of file */
+               if (i == (ChainLength - 1))
+                 NextCluster = 0xFFF;
+
+               UpdateFAT12ClusterEntry(FATTable, CurrentCluster, NextCluster);
+       }
+}
+
 /** Reads or writes a block of data from/to the physical device FLASH using a
  *  block buffer stored in RAM, if the requested block is within the virtual
  *  firmware file's sector ranges in the emulated FAT file system.
  *
 /** Reads or writes a block of data from/to the physical device FLASH using a
  *  block buffer stored in RAM, if the requested block is within the virtual
  *  firmware file's sector ranges in the emulated FAT file system.
  *
- *  \param[in]      BlockNumber  Physical disk block to read from
+ *  \param[in]      BlockNumber  Physical disk block to read from/write to
  *  \param[in,out]  BlockBuffer  Pointer to the start of the block buffer in RAM
  *  \param[in]      Read         If \c true, the requested block is read, if
  *                               \c false, the requested block is written
  */
  *  \param[in,out]  BlockBuffer  Pointer to the start of the block buffer in RAM
  *  \param[in]      Read         If \c true, the requested block is read, if
  *                               \c false, the requested block is written
  */
-static void ReadWriteFirmwareFileBlock(const uint16_t BlockNumber,
-                                       uint8_t* BlockBuffer,
-                                       const bool Read)
+static void ReadWriteFLASHFileBlock(const uint16_t BlockNumber,
+                                    uint8_t* BlockBuffer,
+                                    const bool Read)
 {
 {
+       uint16_t FileStartBlock = DISK_BLOCK_DataStartBlock + (*FLASHFileStartCluster - 2) * SECTOR_PER_CLUSTER;
+       uint16_t FileEndBlock   = FileStartBlock + (FILE_SECTORS(FLASH_FILE_SIZE_BYTES) - 1);
+
        /* Range check the write request - abort if requested block is not within the
         * virtual firmware file sector range */
        /* Range check the write request - abort if requested block is not within the
         * virtual firmware file sector range */
-       if (!((BlockNumber >= FileStartBlock) && (BlockNumber < (FileStartBlock + FILE_SECTORS(FIRMWARE_FILE_SIZE_BYTES)))))
+       if (!((BlockNumber >= FileStartBlock) && (BlockNumber <= FileEndBlock)))
          return;
 
        #if (FLASHEND > 0xFFFF)
          return;
 
        #if (FLASHEND > 0xFFFF)
@@ -239,6 +354,43 @@ static void ReadWriteFirmwareFileBlock(const uint16_t BlockNumber,
        }
 }
 
        }
 }
 
+/** Reads or writes a block of data from/to the physical device EEPROM using a
+ *  block buffer stored in RAM, if the requested block is within the virtual
+ *  firmware file's sector ranges in the emulated FAT file system.
+ *
+ *  \param[in]      BlockNumber  Physical disk block to read from/write to
+ *  \param[in,out]  BlockBuffer  Pointer to the start of the block buffer in RAM
+ *  \param[in]      Read         If \c true, the requested block is read, if
+ *                               \c false, the requested block is written
+ */
+static void ReadWriteEEPROMFileBlock(const uint16_t BlockNumber,
+                                     uint8_t* BlockBuffer,
+                                     const bool Read)
+{
+       uint16_t FileStartBlock = DISK_BLOCK_DataStartBlock + (*EEPROMFileStartCluster - 2) * SECTOR_PER_CLUSTER;
+       uint16_t FileEndBlock   = FileStartBlock + (FILE_SECTORS(EEPROM_FILE_SIZE_BYTES) - 1);
+
+       /* Range check the write request - abort if requested block is not within the
+        * virtual firmware file sector range */
+       if (!((BlockNumber >= FileStartBlock) && (BlockNumber <= FileEndBlock)))
+         return;
+
+       uint16_t EEPROMAddress = (uint16_t)(BlockNumber - FileStartBlock) * SECTOR_SIZE_BYTES;
+
+       if (Read)
+       {
+               /* Read out the mapped block of data from the device's EEPROM */
+               for (uint16_t i = 0; i < SECTOR_SIZE_BYTES; i++)
+                 BlockBuffer[i] = ReadEEPROMByte((uint8_t*)EEPROMAddress++);
+       }
+       else
+       {
+               /* Write out the mapped block of data to the device's EEPROM */
+               for (uint16_t i = 0; i < SECTOR_SIZE_BYTES; i++)
+                 WriteEEPROMByte((uint8_t*)EEPROMAddress++, BlockBuffer[i]);
+       }
+}
+
 /** Writes a block of data to the virtual FAT filesystem, from the USB Mass
  *  Storage interface.
  *
 /** Writes a block of data to the virtual FAT filesystem, from the USB Mass
  *  Storage interface.
  *
@@ -265,15 +417,11 @@ void VirtualFAT_WriteBlock(const uint16_t BlockNumber)
                        /* Copy over the updated directory entries */
                        memcpy(FirmwareFileEntries, BlockBuffer, sizeof(FirmwareFileEntries));
 
                        /* Copy over the updated directory entries */
                        memcpy(FirmwareFileEntries, BlockBuffer, sizeof(FirmwareFileEntries));
 
-                       /* Save the new firmware file block offset so the written and read file
-                        * contents can be correctly mapped to the device's FLASH pages */
-                       FileStartBlock = DISK_BLOCK_DataStartBlock +
-                                        (FirmwareFileEntries[DISK_FILE_ENTRY_FirmwareMSDOS].MSDOS_File.StartingCluster - 2) * SECTOR_PER_CLUSTER;
-
                        break;
 
                default:
                        break;
 
                default:
-                       ReadWriteFirmwareFileBlock(BlockNumber, BlockBuffer, false);
+                       ReadWriteFLASHFileBlock(BlockNumber, BlockBuffer, false);
+                       ReadWriteEEPROMFileBlock(BlockNumber, BlockBuffer, false);
 
                        break;
        }
 
                        break;
        }
@@ -308,18 +456,11 @@ void VirtualFAT_ReadBlock(const uint16_t BlockNumber)
                        /* Cluster 1: Reserved */
                        UpdateFAT12ClusterEntry(BlockBuffer, 1, 0xFFF);
 
                        /* Cluster 1: Reserved */
                        UpdateFAT12ClusterEntry(BlockBuffer, 1, 0xFFF);
 
-                       /* Cluster 2 onwards: Cluster chain of FIRMWARE.BIN */
-                       for (uint16_t i = 0; i <= FILE_CLUSTERS(FIRMWARE_FILE_SIZE_BYTES); i++)
-                       {
-                               uint16_t CurrentCluster = FirmwareFileEntries[DISK_FILE_ENTRY_FirmwareMSDOS].MSDOS_File.StartingCluster + i;
-                               uint16_t NextCluster    = CurrentCluster + 1;
-
-                               /* Mark last cluster as end of file */
-                               if (i == FILE_CLUSTERS(FIRMWARE_FILE_SIZE_BYTES))
-                                 NextCluster = 0xFFF;
+                       /* Cluster 2 onwards: Cluster chain of FLASH.BIN */
+                       UpdateFAT12ClusterChain(BlockBuffer, *FLASHFileStartCluster, FILE_CLUSTERS(FLASH_FILE_SIZE_BYTES));
 
 
-                               UpdateFAT12ClusterEntry(BlockBuffer, CurrentCluster, NextCluster);
-                       }
+                       /* Cluster 2+n onwards: Cluster chain of EEPROM.BIN */
+                       UpdateFAT12ClusterChain(BlockBuffer, *EEPROMFileStartCluster, FILE_CLUSTERS(EEPROM_FILE_SIZE_BYTES));
 
                        break;
 
 
                        break;
 
@@ -329,7 +470,8 @@ void VirtualFAT_ReadBlock(const uint16_t BlockNumber)
                        break;
 
                default:
                        break;
 
                default:
-                       ReadWriteFirmwareFileBlock(BlockNumber, BlockBuffer, true);
+                       ReadWriteFLASHFileBlock(BlockNumber, BlockBuffer, true);
+                       ReadWriteEEPROMFileBlock(BlockNumber, BlockBuffer, true);
 
                        break;
        }
 
                        break;
        }
USB isp AVR programmer