-/*\r
- * AcessOS 0.1\r
- * Floppy Disk Access Code\r
- */\r
-#define DEBUG 0\r
-#include <acess.h>\r
-#include <modules.h>\r
-#include <fs_devfs.h>\r
-#include <tpl_drv_disk.h>\r
-#include <dma.h>\r
-#include <iocache.h>\r
-\r
-#define WARN 0\r
-\r
-// === CONSTANTS ===\r
-// --- Current Version\r
-#define FDD_VERSION ((0<<8)|(75))\r
-\r
-// --- Options\r
-#define USE_CACHE 0 // Use Sector Cache\r
-#define CACHE_SIZE 32 // Number of cachable sectors\r
-#define FDD_SEEK_TIMEOUT 10 // Timeout for a seek operation\r
-#define MOTOR_ON_DELAY 500 // Miliseconds\r
-#define MOTOR_OFF_DELAY 2000 // Miliseconds\r
-\r
-// === TYPEDEFS ===\r
-/**\r
- * \brief Representation of a floppy drive\r
- */\r
-typedef struct {\r
- int type;\r
- volatile int motorState; //2 - On, 1 - Spinup, 0 - Off\r
- int track[2];\r
- int timer;\r
- tVFS_Node Node;\r
- #if !USE_CACHE\r
- tIOCache *CacheHandle;\r
- #endif\r
-} t_floppyDevice;\r
-\r
-/**\r
- * \brief Cached Sector\r
- */\r
-typedef struct {\r
- Uint64 timestamp;\r
- Uint16 disk;\r
- Uint16 sector; // Allows 32Mb of addressable space (Plenty for FDD)\r
- Uint8 data[512];\r
-} t_floppySector;\r
-\r
-// === CONSTANTS ===\r
-static const char *cFDD_TYPES[] = {"None", "360kB 5.25\"", "1.2MB 5.25\"", "720kB 3.5\"", "1.44MB 3.5\"", "2.88MB 3.5\"" };\r
-static const int cFDD_SIZES[] = { 0, 360*1024, 1200*1024, 720*1024, 1440*1024, 2880*1024 };\r
-static const short cPORTBASE[] = { 0x3F0, 0x370 };\r
-\r
-enum FloppyPorts {\r
- PORT_STATUSA = 0x0,\r
- PORT_STATUSB = 0x1,\r
- PORT_DIGOUTPUT = 0x2,\r
- PORT_MAINSTATUS = 0x4,\r
- PORT_DATARATE = 0x4,\r
- PORT_DATA = 0x5,\r
- PORT_DIGINPUT = 0x7,\r
- PORT_CONFIGCTRL = 0x7\r
-};\r
-\r
-enum FloppyCommands {\r
- FIX_DRIVE_DATA = 0x03,\r
- HECK_DRIVE_STATUS = 0x04,\r
- CALIBRATE_DRIVE = 0x07,\r
- CHECK_INTERRUPT_STATUS = 0x08,\r
- SEEK_TRACK = 0x0F,\r
- READ_SECTOR_ID = 0x4A,\r
- FORMAT_TRACK = 0x4D,\r
- READ_TRACK = 0x42,\r
- READ_SECTOR = 0x66,\r
- WRITE_SECTOR = 0xC5,\r
- WRITE_DELETE_SECTOR = 0xC9,\r
- READ_DELETE_SECTOR = 0xCC,\r
-};\r
-\r
-// === PROTOTYPES ===\r
-// --- Filesystem\r
- int FDD_Install(char **Arguments);\r
-char *FDD_ReadDir(tVFS_Node *Node, int pos);\r
-tVFS_Node *FDD_FindDir(tVFS_Node *dirNode, char *Name);\r
- int FDD_IOCtl(tVFS_Node *Node, int ID, void *Data);\r
-Uint64 FDD_ReadFS(tVFS_Node *node, Uint64 off, Uint64 len, void *buffer);\r
-// --- 1st Level Disk Access\r
-Uint FDD_ReadSectors(Uint64 SectorAddr, Uint Count, void *Buffer, Uint Disk);\r
-// --- Raw Disk Access\r
- int FDD_ReadSector(Uint32 disk, Uint64 lba, void *Buffer);\r
- int FDD_WriteSector(Uint32 Disk, Uint64 LBA, void *Buffer);\r
-// --- Helpers\r
-void FDD_IRQHandler(int Num);\r
-void FDD_WaitIRQ();\r
-void FDD_SensInt(int base, Uint8 *sr0, Uint8 *cyl);\r
-inline void FDD_AquireSpinlock();\r
-inline void FDD_FreeSpinlock();\r
-#if USE_CACHE\r
-inline void FDD_AquireCacheSpinlock();\r
-inline void FDD_FreeCacheSpinlock();\r
-#endif\r
-void FDD_int_SendByte(int base, char byte);\r
- int FDD_int_GetByte(int base);\r
-void FDD_Reset(int id);\r
-void FDD_Recalibrate(int disk);\r
- int FDD_int_SeekTrack(int disk, int head, int track);\r
-void FDD_int_TimerCallback(int arg);\r
-void FDD_int_StopMotor(int disk);\r
-void FDD_int_StartMotor(int disk);\r
- int FDD_int_GetDims(int type, int lba, int *c, int *h, int *s, int *spt);\r
-\r
-// === GLOBALS ===\r
-MODULE_DEFINE(0, FDD_VERSION, FDD, FDD_Install, NULL, NULL);\r
-t_floppyDevice gFDD_Devices[2];\r
-volatile int fdd_inUse = 0;\r
-volatile int fdd_irq6 = 0;\r
-tDevFS_Driver gFDD_DriverInfo = {\r
- NULL, "fdd",\r
- {\r
- .Size = -1,\r
- .NumACLs = 1,\r
- .ACLs = &gVFS_ACL_EveryoneRX,\r
- .Flags = VFS_FFLAG_DIRECTORY,\r
- .ReadDir = FDD_ReadDir,\r
- .FindDir = FDD_FindDir,\r
- .IOCtl = FDD_IOCtl\r
- }\r
-};\r
-#if USE_CACHE\r
-int siFDD_CacheInUse = 0;\r
-int siFDD_SectorCacheSize = CACHE_SIZE;\r
-t_floppySector sFDD_SectorCache[CACHE_SIZE];\r
-#endif\r
-\r
-// === CODE ===\r
-/**\r
- * \fn int FDD_Install(char **Arguments)\r
- * \brief Installs floppy driver\r
- */\r
-int FDD_Install(char **Arguments)\r
-{\r
- Uint8 data;\r
- \r
- // Determine Floppy Types (From CMOS)\r
- outb(0x70, 0x10);\r
- data = inb(0x71);\r
- gFDD_Devices[0].type = data >> 4;\r
- gFDD_Devices[1].type = data & 0xF;\r
- gFDD_Devices[0].track[0] = -1;\r
- gFDD_Devices[1].track[1] = -1;\r
- \r
- Log("[FDD ] Detected Disk 0: %s and Disk 1: %s", cFDD_TYPES[data>>4], cFDD_TYPES[data&0xF]);\r
- \r
- // Clear FDD IRQ Flag\r
- FDD_SensInt(0x3F0, NULL, NULL);\r
- // Install IRQ6 Handler\r
- IRQ_AddHandler(6, FDD_IRQHandler);\r
- // Reset Primary FDD Controller\r
- FDD_Reset(0);\r
- \r
- // Initialise Root Node\r
- gFDD_DriverInfo.RootNode.CTime = gFDD_DriverInfo.RootNode.MTime\r
- = gFDD_DriverInfo.RootNode.ATime = now();\r
- \r
- // Initialise Child Nodes\r
- gFDD_Devices[0].Node.Inode = 0;\r
- gFDD_Devices[0].Node.Flags = 0;\r
- gFDD_Devices[0].Node.NumACLs = 0;\r
- gFDD_Devices[0].Node.Read = FDD_ReadFS;\r
- gFDD_Devices[0].Node.Write = NULL;//fdd_writeFS;\r
- memcpy(&gFDD_Devices[1].Node, &gFDD_Devices[0].Node, sizeof(tVFS_Node));\r
- \r
- gFDD_Devices[1].Node.Inode = 1;\r
- \r
- // Set Lengths\r
- gFDD_Devices[0].Node.Size = cFDD_SIZES[data >> 4];\r
- gFDD_Devices[1].Node.Size = cFDD_SIZES[data & 0xF];\r
- \r
- // Create Sector Cache\r
- #if USE_CACHE\r
- //sFDD_SectorCache = malloc(sizeof(*sFDD_SectorCache)*CACHE_SIZE);\r
- //siFDD_SectorCacheSize = CACHE_SIZE;\r
- #else\r
- if( cFDD_SIZES[data >> 4] ) {\r
- gFDD_Devices[0].CacheHandle = IOCache_Create(\r
- FDD_WriteSector, 0, 512,\r
- gFDD_Devices[0].Node.Size / (512*4)\r
- ); // Cache is 1/4 the size of the disk\r
- }\r
- if( cFDD_SIZES[data & 15] ) {\r
- gFDD_Devices[1].CacheHandle = IOCache_Create(\r
- FDD_WriteSector, 0, 512,\r
- gFDD_Devices[1].Node.Size / (512*4)\r
- ); // Cache is 1/4 the size of the disk\r
- }\r
- #endif\r
- \r
- // Register with devfs\r
- DevFS_AddDevice(&gFDD_DriverInfo);\r
- \r
- return MODULE_ERR_OK;\r
-}\r
-\r
-/**\r
- * \fn char *FDD_ReadDir(tVFS_Node *Node, int pos)\r
- * \brief Read Directory\r
- */\r
-char *FDD_ReadDir(tVFS_Node *Node, int pos)\r
-{\r
- char name[2] = "0\0";\r
- //Update Accessed Time\r
- //gFDD_DrvInfo.rootNode.atime = now();\r
- \r
- //Check for bounds\r
- if(pos >= 2 || pos < 0)\r
- return NULL;\r
- \r
- if(gFDD_Devices[pos].type == 0)\r
- return VFS_SKIP;\r
- \r
- name[0] += pos;\r
- \r
- //Return\r
- return strdup(name);\r
-}\r
-\r
-/**\r
- * \fn tVFS_Node *FDD_FindDir(tVFS_Node *Node, char *filename);\r
- * \brief Find File Routine (for vfs_node)\r
- */\r
-tVFS_Node *FDD_FindDir(tVFS_Node *Node, char *Filename)\r
-{\r
- int i;\r
- \r
- ENTER("sFilename", Filename);\r
- \r
- // Sanity check string\r
- if(Filename == NULL) {\r
- LEAVE('n');\r
- return NULL;\r
- }\r
- \r
- // Check string length (should be 1)\r
- if(Filename[0] == '\0' || Filename[1] != '\0') {\r
- LEAVE('n');\r
- return NULL;\r
- }\r
- \r
- // Get First character\r
- i = Filename[0] - '0';\r
- \r
- // Check for 1st disk and if it is present return\r
- if(i == 0 && gFDD_Devices[0].type != 0) {\r
- LEAVE('p', &gFDD_Devices[0].Node);\r
- return &gFDD_Devices[0].Node;\r
- }\r
- \r
- // Check for 2nd disk and if it is present return\r
- if(i == 1 && gFDD_Devices[1].type != 0) {\r
- LEAVE('p', &gFDD_Devices[1].Node);\r
- return &gFDD_Devices[1].Node;\r
- }\r
- \r
- // Else return null\r
- LEAVE('n');\r
- return NULL;\r
-}\r
-\r
-static const char *casIOCTLS[] = {DRV_IOCTLNAMES,DRV_DISK_IOCTLNAMES,NULL};\r
-/**\r
- * \fn int FDD_IOCtl(tVFS_Node *Node, int id, void *data)\r
- * \brief Stub ioctl function\r
- */\r
-int FDD_IOCtl(tVFS_Node *Node, int ID, void *Data)\r
-{\r
- switch(ID)\r
- {\r
- case DRV_IOCTL_TYPE: return DRV_TYPE_DISK;\r
- case DRV_IOCTL_IDENT: return ModUtil_SetIdent(Data, "FDD");\r
- case DRV_IOCTL_VERSION: return FDD_VERSION;\r
- case DRV_IOCTL_LOOKUP: return ModUtil_LookupString((char**)casIOCTLS, Data);\r
- \r
- case DISK_IOCTL_GETBLOCKSIZE: return 512; \r
- \r
- default:\r
- return 0;\r
- }\r
-}\r
-\r
-/**\r
- * \fn Uint64 FDD_ReadFS(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)\r
- * \brief Read Data from a disk\r
-*/\r
-Uint64 FDD_ReadFS(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)\r
-{\r
- int i = 0;\r
- int disk;\r
- //Uint32 buf[128];\r
- \r
- ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);\r
- \r
- if(Node == NULL) {\r
- LEAVE('i', -1);\r
- return -1;\r
- }\r
- \r
- if(Node->Inode != 0 && Node->Inode != 1) {\r
- LEAVE('i', -1);\r
- return -1;\r
- }\r
- \r
- disk = Node->Inode;\r
- \r
- // Update Accessed Time\r
- Node->ATime = now();\r
- \r
- #if 0\r
- if((Offset & 0x1FF) || (Length & 0x1FF))\r
- {\r
- // Un-Aligned Offset/Length\r
- int startOff = Offset >> 9;\r
- int sectOff = Offset & 0x1FF;\r
- int sectors = (Length + 0x1FF) >> 9;\r
- \r
- LOG("Non-aligned Read");\r
- \r
- //Read Starting Sector\r
- if(!FDD_ReadSector(disk, startOff, buf))\r
- return 0;\r
- memcpy(Buffer, (char*)(buf+sectOff), Length > 512-sectOff ? 512-sectOff : Length);\r
- \r
- // If the data size is one sector or less\r
- if(Length <= 512-sectOff)\r
- {\r
- LEAVE('X', Length);\r
- return Length; //Return\r
- }\r
- Buffer += 512-sectOff;\r
- \r
- //Read Middle Sectors\r
- for( i = 1; i < sectors - 1; i++ )\r
- {\r
- if(!FDD_ReadSector(disk, startOff+i, buf)) {\r
- LEAVE('i', -1);\r
- return -1;\r
- }\r
- memcpy(Buffer, buf, 512);\r
- Buffer += 512;\r
- }\r
- \r
- //Read End Sectors\r
- if(!FDD_ReadSector(disk, startOff+i, buf))\r
- return 0;\r
- memcpy(Buffer, buf, (len&0x1FF)-sectOff);\r
+/*
+ * AcessOS 0.1
+ * Floppy Disk Access Code
+ */
+#define DEBUG 0
+#include <acess.h>
+#include <modules.h>
+#include <fs_devfs.h>
+#include <tpl_drv_disk.h>
+#include <dma.h>
+#include <iocache.h>
+
+#define WARN 0
+
+// === CONSTANTS ===
+// --- Current Version
+#define FDD_VERSION ((0<<8)|(75))
+
+// --- Options
+#define FDD_SEEK_TIMEOUT 10 // Timeout for a seek operation
+#define MOTOR_ON_DELAY 500 // Miliseconds
+#define MOTOR_OFF_DELAY 2000 // Miliseconds
+#define FDD_MAX_READWRITE_ATTEMPTS 16
+
+// === TYPEDEFS ===
+/**
+ * \brief Representation of a floppy drive
+ */
+typedef struct sFloppyDrive
+{
+ int type;
+ volatile int motorState; //2 - On, 1 - Spinup, 0 - Off
+ int track[2];
+ int timer;
+ tVFS_Node Node;
+ #if !USE_CACHE
+ tIOCache *CacheHandle;
+ #endif
+} t_floppyDevice;
+
+/**
+ * \brief Cached Sector
+ */
+typedef struct {
+ Uint64 timestamp;
+ Uint16 disk;
+ Uint16 sector; // Allows 32Mb of addressable space (Plenty for FDD)
+ Uint8 data[512];
+} t_floppySector;
+
+// === CONSTANTS ===
+static const char *cFDD_TYPES[] = {"None", "360kB 5.25\"", "1.2MB 5.25\"", "720kB 3.5\"", "1.44MB 3.5\"", "2.88MB 3.5\"" };
+static const int cFDD_SIZES[] = { 0, 360*1024, 1200*1024, 720*1024, 1440*1024, 2880*1024 };
+static const short cPORTBASE[] = { 0x3F0, 0x370 };
+#if DEBUG
+static const char *cFDD_STATUSES[] = {NULL, "Error", "Invalid command", "Drive not ready"};
+#endif
+
+enum FloppyPorts {
+ PORT_STATUSA = 0x0,
+ PORT_STATUSB = 0x1,
+ PORT_DIGOUTPUT = 0x2,
+ PORT_MAINSTATUS = 0x4,
+ PORT_DATARATE = 0x4,
+ PORT_DATA = 0x5,
+ PORT_DIGINPUT = 0x7,
+ PORT_CONFIGCTRL = 0x7
+};
+
+enum FloppyCommands {
+ FIX_DRIVE_DATA = 0x03,
+ CHECK_DRIVE_STATUS = 0x04,
+ CALIBRATE_DRIVE = 0x07,
+ CHECK_INTERRUPT_STATUS = 0x08,
+ SEEK_TRACK = 0x0F,
+ READ_SECTOR_ID = 0x4A,
+ FORMAT_TRACK = 0x4D,
+ READ_TRACK = 0x42,
+ READ_SECTOR = 0x66,
+ WRITE_SECTOR = 0xC5,
+ WRITE_DELETE_SECTOR = 0xC9,
+ READ_DELETE_SECTOR = 0xCC,
+};
+
+// === PROTOTYPES ===
+// --- Filesystem
+ int FDD_Install(char **Arguments);
+void FDD_UnloadModule();
+// --- VFS Methods
+char *FDD_ReadDir(tVFS_Node *Node, int pos);
+tVFS_Node *FDD_FindDir(tVFS_Node *dirNode, const char *Name);
+ int FDD_IOCtl(tVFS_Node *Node, int ID, void *Data);
+Uint64 FDD_ReadFS(tVFS_Node *node, Uint64 off, Uint64 len, void *buffer);
+// --- Functions for IOCache/DrvUtil
+Uint FDD_ReadSectors(Uint64 SectorAddr, Uint Count, void *Buffer, Uint Disk);
+// --- Raw Disk Access
+ int FDD_ReadSector(Uint32 disk, Uint64 lba, void *Buffer);
+ int FDD_WriteSector(Uint32 Disk, Uint64 LBA, void *Buffer);
+// --- Helpers
+void FDD_IRQHandler(int Num);
+inline void FDD_WaitIRQ();
+void FDD_SensInt(int base, Uint8 *sr0, Uint8 *cyl);
+void FDD_int_SendByte(int base, char byte);
+ int FDD_int_GetByte(int base);
+void FDD_Reset(int id);
+void FDD_Recalibrate(int disk);
+ int FDD_int_SeekTrack(int disk, int head, int track);
+void FDD_int_TimerCallback(void *Arg);
+void FDD_int_StopMotor(void *Arg);
+void FDD_int_StartMotor(int Disk);
+ int FDD_int_GetDims(int type, int lba, int *c, int *h, int *s, int *spt);
+
+// === GLOBALS ===
+MODULE_DEFINE(0, FDD_VERSION, FDD, FDD_Install, NULL, "ISADMA", NULL);
+t_floppyDevice gFDD_Devices[2];
+tMutex glFDD;
+volatile int gbFDD_IrqFired = 0;
+tDevFS_Driver gFDD_DriverInfo = {
+ NULL, "fdd",
+ {
+ .Size = -1,
+ .NumACLs = 1,
+ .ACLs = &gVFS_ACL_EveryoneRX,
+ .Flags = VFS_FFLAG_DIRECTORY,
+ .ReadDir = FDD_ReadDir,
+ .FindDir = FDD_FindDir,
+ .IOCtl = FDD_IOCtl
+ }
+};
+
+// === CODE ===
+/**
+ * \fn int FDD_Install(char **Arguments)
+ * \brief Installs floppy driver
+ */
+int FDD_Install(char **Arguments)
+{
+ Uint8 data;
+ char **args = Arguments;
+
+ // Determine Floppy Types (From CMOS)
+ outb(0x70, 0x10);
+ data = inb(0x71);
+ gFDD_Devices[0].type = data >> 4;
+ gFDD_Devices[1].type = data & 0xF;
+ gFDD_Devices[0].track[0] = -1;
+ gFDD_Devices[1].track[1] = -1;
+
+ if(args) {
+ for(;*args;args++)
+ {
+ if(strcmp(*args, "disable")==0)
+ return MODULE_ERR_NOTNEEDED;
+ }
+ }
+
+ Log_Log("FDD", "Detected Disk 0: %s and Disk 1: %s", cFDD_TYPES[data>>4], cFDD_TYPES[data&0xF]);
+
+ if( data == 0 ) {
+ return MODULE_ERR_NOTNEEDED;
+ }
+
+ // Clear FDD IRQ Flag
+ FDD_SensInt(0x3F0, NULL, NULL);
+ // Install IRQ6 Handler
+ IRQ_AddHandler(6, FDD_IRQHandler);
+ // Reset Primary FDD Controller
+ FDD_Reset(0);
+
+ // Initialise Root Node
+ gFDD_DriverInfo.RootNode.CTime = gFDD_DriverInfo.RootNode.MTime
+ = gFDD_DriverInfo.RootNode.ATime = now();
+
+ // Initialise Child Nodes
+ gFDD_Devices[0].Node.Inode = 0;
+ gFDD_Devices[0].Node.Flags = 0;
+ gFDD_Devices[0].Node.NumACLs = 0;
+ gFDD_Devices[0].Node.Read = FDD_ReadFS;
+ gFDD_Devices[0].Node.Write = NULL;//FDD_WriteFS;
+ memcpy(&gFDD_Devices[1].Node, &gFDD_Devices[0].Node, sizeof(tVFS_Node));
+
+ gFDD_Devices[1].Node.Inode = 1;
+
+ // Set Lengths
+ gFDD_Devices[0].Node.Size = cFDD_SIZES[data >> 4];
+ gFDD_Devices[1].Node.Size = cFDD_SIZES[data & 0xF];
+
+ // Create Sector Cache
+ if( cFDD_SIZES[data >> 4] )
+ {
+ gFDD_Devices[0].CacheHandle = IOCache_Create(
+ FDD_WriteSector, 0, 512,
+ gFDD_Devices[0].Node.Size / (512*4)
+ ); // Cache is 1/4 the size of the disk
+ }
+ if( cFDD_SIZES[data & 15] )
+ {
+ gFDD_Devices[1].CacheHandle = IOCache_Create(
+ FDD_WriteSector, 0, 512,
+ gFDD_Devices[1].Node.Size / (512*4)
+ ); // Cache is 1/4 the size of the disk
+ }
+
+ // Register with devfs
+ DevFS_AddDevice(&gFDD_DriverInfo);
+
+ return MODULE_ERR_OK;
+}
+
+/**
+ * \brief Prepare the module for removal
+ */
+void FDD_UnloadModule()
+{
+ int i;
+ DevFS_DelDevice( &gFDD_DriverInfo );
+ Mutex_Acquire(&glFDD);
+ for(i=0;i<4;i++) {
+ Time_RemoveTimer(gFDD_Devices[i].timer);
+ FDD_int_StopMotor((void *)(Uint)i);
+ }
+ Mutex_Release(&glFDD);
+ //IRQ_Clear(6);
+}
+
+/**
+ * \fn char *FDD_ReadDir(tVFS_Node *Node, int pos)
+ * \brief Read Directory
+ */
+char *FDD_ReadDir(tVFS_Node *UNUSED(Node), int Pos)
+{
+ char name[2] = "0\0";
+
+ if(Pos >= 2 || Pos < 0) return NULL;
+
+ if(gFDD_Devices[Pos].type == 0) return VFS_SKIP;
+
+ name[0] += Pos;
+
+ return strdup(name);
+}
+
+/**
+ * \fn tVFS_Node *FDD_FindDir(tVFS_Node *Node, const char *filename);
+ * \brief Find File Routine (for vfs_node)
+ */
+tVFS_Node *FDD_FindDir(tVFS_Node *UNUSED(Node), const char *Filename)
+{
+ int i;
+
+ ENTER("sFilename", Filename);
+
+ // Sanity check string
+ if(Filename == NULL) {
+ LEAVE('n');
+ return NULL;
+ }
+
+ // Check string length (should be 1)
+ if(Filename[0] == '\0' || Filename[1] != '\0') {
+ LEAVE('n');
+ return NULL;
+ }
+
+ // Get First character
+ i = Filename[0] - '0';
+
+ // Check for 1st disk and if it is present return
+ if(i == 0 && gFDD_Devices[0].type != 0) {
+ LEAVE('p', &gFDD_Devices[0].Node);
+ return &gFDD_Devices[0].Node;
+ }
+
+ // Check for 2nd disk and if it is present return
+ if(i == 1 && gFDD_Devices[1].type != 0) {
+ LEAVE('p', &gFDD_Devices[1].Node);
+ return &gFDD_Devices[1].Node;
+ }
+
+ // Else return null
+ LEAVE('n');
+ return NULL;
+}
+
+static const char *casIOCTLS[] = {DRV_IOCTLNAMES,DRV_DISK_IOCTLNAMES,NULL};
+/**
+ * \fn int FDD_IOCtl(tVFS_Node *Node, int id, void *data)
+ * \brief Stub ioctl function
+ */
+int FDD_IOCtl(tVFS_Node *UNUSED(Node), int ID, void *Data)
+{
+ switch(ID)
+ {
+ BASE_IOCTLS(DRV_TYPE_DISK, "FDD", FDD_VERSION, casIOCTLS);
+
+ case DISK_IOCTL_GETBLOCKSIZE: return 512;
+
+ default:
+ return 0;
+ }
+}
+
+/**
+ * \fn Uint64 FDD_ReadFS(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
+ * \brief Read Data from a disk
+*/
+Uint64 FDD_ReadFS(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
+{
+ int ret;
+
+ ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
+
+ if(Node == NULL) {
+ LEAVE('i', -1);
+ return -1;
+ }
+
+ if(Node->Inode != 0 && Node->Inode != 1) {
+ LEAVE('i', -1);
+ return -1;
+ }
+
+ ret = DrvUtil_ReadBlock(Offset, Length, Buffer, FDD_ReadSectors, 512, Node->Inode);
+ LEAVE('i', ret);
+ return ret;
+}
+
+/**
+ * \brief Reads \a Count contiguous sectors from a disk
+ * \param SectorAddr Address of the first sector
+ * \param Count Number of sectors to read
+ * \param Buffer Destination Buffer
+ * \param Disk Disk Number
+ * \return Number of sectors read
+ * \note Used as a ::DrvUtil_ReadBlock helper
+ */
+Uint FDD_ReadSectors(Uint64 SectorAddr, Uint Count, void *Buffer, Uint Disk)
+{
+ Uint ret = 0;
+ while(Count --)
+ {
+ if( FDD_ReadSector(Disk, SectorAddr, Buffer) != 1 )
+ return ret;