-/*\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 FDD_SEEK_TIMEOUT 10 // Timeout for a seek operation\r
-#define MOTOR_ON_DELAY 500 // Miliseconds\r
-#define MOTOR_OFF_DELAY 2000 // Miliseconds\r
-#define FDD_MAX_READWRITE_ATTEMPTS 16\r
-\r
-// === TYPEDEFS ===\r
-/**\r
- * \brief Representation of a floppy drive\r
- */\r
-typedef struct sFloppyDrive\r
-{\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
-#if DEBUG\r
-static const char *cFDD_STATUSES[] = {NULL, "Error", "Invalid command", "Drive not ready"};\r
-#endif\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
-void FDD_UnloadModule();\r
-// --- VFS Methods\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
-// --- Functions for IOCache/DrvUtil\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
-inline void FDD_WaitIRQ();\r
-void FDD_SensInt(int base, Uint8 *sr0, Uint8 *cyl);\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, "ISADMA", NULL);\r
-t_floppyDevice gFDD_Devices[2];\r
-tSpinlock glFDD;\r
-volatile int gbFDD_IrqFired = 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
-\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
- if( data == 0 ) {\r
- return MODULE_ERR_NOTNEEDED;\r
- }\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( cFDD_SIZES[data >> 4] )\r
- {\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
- {\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
- \r
- // Register with devfs\r
- DevFS_AddDevice(&gFDD_DriverInfo);\r
- \r
- return MODULE_ERR_OK;\r
-}\r
-\r
-/**\r
- * \brief Prepare the module for removal\r
- */\r
-void FDD_UnloadModule()\r
-{\r
- int i;\r
- //DevFS_DelDevice( &gFDD_DriverInfo );\r
- LOCK(&glFDD);\r
- for(i=0;i<4;i++) {\r
- Time_RemoveTimer(gFDD_Devices[i].timer);\r
- FDD_int_StopMotor(i);\r
- }\r
- RELEASE(&glFDD);\r
- //IRQ_Clear(6);\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
-\r
- if(Pos >= 2 || Pos < 0) return NULL;\r
- \r
- if(gFDD_Devices[Pos].type == 0) return VFS_SKIP;\r
- \r
- name[0] += Pos;\r
- \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 ret;\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
- ret = DrvUtil_ReadBlock(Offset, Length, Buffer, FDD_ReadSectors, 512, Node->Inode);\r
- LEAVE('i', ret);\r
- return ret;\r
-}\r
-\r
-/**\r
- * \brief Reads \a Count contiguous sectors from a disk\r
- * \param SectorAddr Address of the first sector\r
- * \param Count Number of sectors to read\r
- * \param Buffer Destination Buffer\r
- * \param Disk Disk Number\r
- * \return Number of sectors read\r
- * \note Used as a ::DrvUtil_ReadBlock helper\r
- */\r
-Uint FDD_ReadSectors(Uint64 SectorAddr, Uint Count, void *Buffer, Uint Disk)\r
-{\r
- Uint ret = 0;\r
- while(Count --)\r
- {\r
- if( FDD_ReadSector(Disk, SectorAddr, Buffer) != 1 )\r
- return ret;\r
- \r
- Buffer = (void*)( (tVAddr)Buffer + 512 );\r
- SectorAddr ++;\r
- ret ++;\r
- }\r
- return ret;\r
-}\r
-\r
-int FDD_int_ReadWriteSector(Uint32 Disk, Uint64 SectorAddr, int Write, void *Buffer)\r
-{\r
- int cyl, head, sec;\r
- int spt, base;\r
- int i;\r
- int lba = SectorAddr;\r
- Uint8 st0, st1, st2, rcy, rhe, rse, bps; // Status Values\r
- \r
- ENTER("iDisk XSectorAddr pBuffer", Disk, SectorAddr, Buffer);\r
- \r
- base = cPORTBASE[Disk >> 1];\r
- \r
- LOG("Calculating Disk Dimensions");\r
- // Get CHS position\r
- if(FDD_int_GetDims(gFDD_Devices[Disk].type, lba, &cyl, &head, &sec, &spt) != 1)\r
- {\r
- LEAVE('i', -1);\r
- return -1;\r
- }\r
- LOG("Cyl=%i, Head=%i, Sector=%i", cyl, head, sec);\r
- \r
- LOCK(&glFDD); // Lock to stop the motor stopping on us\r
- Time_RemoveTimer(gFDD_Devices[Disk].timer); // Remove Old Timer\r
- // Start motor if needed\r
- if(gFDD_Devices[Disk].motorState != 2) FDD_int_StartMotor(Disk);\r
- RELEASE(&glFDD);\r
- \r
- LOG("Wait for the motor to spin up");\r
- \r
- // Wait for spinup\r
- while(gFDD_Devices[Disk].motorState == 1) Threads_Yield();\r
- \r
- LOG("Acquire Spinlock");\r
- LOCK(&glFDD);\r
- \r
- // Seek to track\r
- outb(base + CALIBRATE_DRIVE, 0);\r
- i = 0;\r
- while(FDD_int_SeekTrack(Disk, head, (Uint8)cyl) == 0 && i++ < FDD_SEEK_TIMEOUT )\r
- Threads_Yield();\r
- if( i > FDD_SEEK_TIMEOUT ) {\r
- RELEASE(&glFDD);\r
- LEAVE('i', 0);\r
- return 0;\r
- }\r
- //FDD_SensInt(base, NULL, NULL); // Wait for IRQ\r
- \r
- // Read Data from DMA\r
- LOG("Setting DMA for read");\r
- DMA_SetChannel(2, 512, !Write); // Read 512 Bytes from channel 2\r
- \r
- LOG("Sending command");\r
- \r
- //Threads_Wait(100); // Wait for Head to settle\r
- Time_Delay(100);\r
- \r
- for( i = 0; i < FDD_MAX_READWRITE_ATTEMPTS; i ++ )\r
- {\r
- if( Write )\r
- FDD_int_SendByte(base, READ_SECTOR); // Was 0xE6\r
- else\r
- FDD_int_SendByte(base, READ_SECTOR); // Was 0xE6\r
- FDD_int_SendByte(base, (head << 2) | (Disk&1));\r
- FDD_int_SendByte(base, (Uint8)cyl);\r
- FDD_int_SendByte(base, (Uint8)head);\r
- FDD_int_SendByte(base, (Uint8)sec);\r
- FDD_int_SendByte(base, 0x02); // Bytes Per Sector (Real BPS=128*2^{val})\r
- FDD_int_SendByte(base, spt); // SPT\r
- FDD_int_SendByte(base, 0x1B); // Gap Length (27 is default)\r
- FDD_int_SendByte(base, 0xFF); // Data Length\r
- \r
- // Wait for IRQ\r
- if( Write ) {\r
- LOG("Writing Data");\r
- DMA_WriteData(2, 512, Buffer);\r
- LOG("Waiting for Data to be written");\r
- FDD_WaitIRQ();\r
- }\r
- else {\r
- LOG("Waiting for data to be read");\r
- FDD_WaitIRQ();\r
- LOG("Reading Data");\r
- DMA_ReadData(2, 512, Buffer);\r
- }\r
- \r
- // Clear Input Buffer\r
- LOG("Clearing Input Buffer");\r
- // Status Values\r
- st0 = FDD_int_GetByte(base);\r
- st1 = FDD_int_GetByte(base);\r
- st2 = FDD_int_GetByte(base);\r
- \r
- // Cylinder, Head and Sector (mutilated in some way\r
- rcy = FDD_int_GetByte(base);\r
- rhe = FDD_int_GetByte(base);\r
- rse = FDD_int_GetByte(base);\r
- // Should be the BPS set above (0x02)\r
- bps = FDD_int_GetByte(base);\r
- \r
- // Check Status\r
- // - Error Code\r
- if(st0 & 0xC0) {\r
- LOG("Error (st0 & 0xC0) \"%s\"", cFDD_STATUSES[st0 >> 6]);\r
- continue;\r
- }\r
- // - Status Flags\r
- if(st0 & 0x08) { LOG("Drive not ready"); continue; }\r
- if(st1 & 0x80) { LOG("End of Cylinder"); continue; }\r
- if(st1 & 0x20) { LOG("CRC Error"); continue; }\r
- if(st1 & 0x10) { LOG("Controller Timeout"); continue; }\r
- if(st1 & 0x04) { LOG("No Data Found"); continue; }\r
- if(st1 & 0x01 || st2 & 0x01) {\r
- LOG("No Address mark found");\r
- continue;\r
- }\r
- if(st2 & 0x40) { LOG("Deleted address mark"); continue; }\r
- if(st2 & 0x20) { LOG("CRC error in data"); continue; }\r
- if(st2 & 0x10) { LOG("Wrong Cylinder"); continue; }\r
- if(st2 & 0x04) { LOG("uPD765 sector not found"); continue; }\r
- if(st2 & 0x02) { LOG("Bad Cylinder"); continue; }\r
- \r
- if(bps != 0x2) {\r
- LOG("Returned BPS = 0x%02x, not 0x02", bps);\r
- continue;\r
- }\r
- \r
- if(st1 & 0x02) {\r
- LOG("Floppy not writable");\r
- i = FDD_MAX_READWRITE_ATTEMPTS;\r
- break;\r
- }\r
- }\r
- \r
- // Release Spinlock\r
- LOG("Realeasing Spinlock and setting motor to stop");\r
- RELEASE(&glFDD);\r
- \r
- // Don't turn the motor off now, wait for a while\r
- gFDD_Devices[Disk].timer = Time_CreateTimer(MOTOR_OFF_DELAY, FDD_int_StopMotor, (void*)Disk);\r
-\r
- if( i < FDD_MAX_READWRITE_ATTEMPTS ) {\r
- LEAVE('i', 0);\r
- return 0;\r
- }\r
- else {\r
- LEAVE('i', 1);\r
- return 1;\r
- }\r
-}\r
-\r
-/**\r
- * \fn int FDD_ReadSector(Uint32 Disk, Uint64 SectorAddr, void *Buffer)\r
- * \brief Read a sector from disk\r
- * \todo Make real-hardware safe (account for read errors)\r
-*/\r
-int FDD_ReadSector(Uint32 Disk, Uint64 SectorAddr, void *Buffer)\r
-{\r
- int ret;\r
- \r
- ENTER("iDisk XSectorAddr pBuffer", Disk, SectorAddr, Buffer);\r
- \r
- if( IOCache_Read( gFDD_Devices[Disk].CacheHandle, SectorAddr, Buffer ) == 1 ) {\r
- LEAVE('i', 1);\r
- return 1;\r
- }\r
- \r
- // Pass to general function\r
+/*
+ * AcessOS 0.1
+ * Floppy Disk Access Code
+ */
+#define DEBUG 0
+#include <acess.h>
+#include <modules.h>
+#include <fs_devfs.h>
+#include <api_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
+};
+
+#define CMD_FLAG_MULTI_TRACK 0x80 //!< Multitrack
+#define CMD_FLAG_MFM_ENCODING 0x40 //!< MFM Encoding Mode (Always set for read/write/format/verify)
+#define CMD_FLAG_SKIP_MODE 0x20 //!< Skip Mode (don't use)
+enum FloppyCommands {
+ CMD_READ_TRACK = 0x02,
+ CMD_SPECIFY = 0x03,
+ CMD_SENSE_STATUS = 0x04,
+ CMD_WRITE_DATA = 0x05,
+ CMD_READ_DATA = 0x06,
+ CMD_RECALIBRATE = 0x07,
+ CMD_SENSE_INTERRUPT = 0x08,
+ CMD_WRITE_DEL_DATA = 0x09,
+ CMD_READ_SECTOR_ID = 0x0A,
+ // 0x0B - ?
+ CMD_READ_DEL_DATA = 0x0C,
+ CMD_FORMAT_TRACK = 0x0D,
+ // 0x0E - ?
+ CMD_SEEK_TRACK = 0x0F,
+ CMD_VERSION = 0x10,
+
+ CMD_LOCK = 0x14, //!< Save controller parameters
+
+ CMD_CONFIGURE = 0x13
+};
+
+// === 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
+ int FDD_WaitIRQ();
+void FDD_IRQHandler(int Num, void *Ptr);
+void FDD_SenseInt(int base, Uint8 *sr0, Uint8 *cyl);
+
+ int FDD_Reset(int id);
+void FDD_Recalibrate(int disk);
+ int FDD_Reconfigure(int ID);
+
+ int FDD_int_SeekTrack(int disk, int head, int track);
+void FDD_int_TimerCallback(void *Arg);
+void FDD_int_StopMotor(int Disk);
+void FDD_int_StopMotorCallback(void *Arg);
+void FDD_int_StartMotor(int Disk);
+ int FDD_int_GetDims(int type, int lba, int *c, int *h, int *s, int *spt);
+
+ int FDD_int_SendByte(int base, Uint8 Byte);
+ int FDD_int_GetByte(int base, Uint8 *Byte);
+
+// === GLOBALS ===
+MODULE_DEFINE(0, FDD_VERSION, FDD, FDD_Install, NULL, "x86_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;
+
+ 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;
+ }
+
+ // Handle arguments
+ if(args) {
+ for(;*args;args++)
+ {
+ if(strcmp(*args, "disable")==0)
+ return MODULE_ERR_NOTNEEDED;
+ }
+ }
+
+ // Install IRQ6 Handler
+ IRQ_AddHandler(6, FDD_IRQHandler, NULL);
+
+ // Ensure the FDD version is 0x90
+ {
+ Uint8 tmp = 0;
+ FDD_int_SendByte(cPORTBASE[0], CMD_VERSION);
+ FDD_int_GetByte(cPORTBASE[0], &tmp);
+ if( tmp != 0x90 ) {
+ Log_Error("FDD", "Version(0x%2x) != 0x90", tmp);
+ return MODULE_ERR_NOTNEEDED;
+ }
+ }
+
+ // Configure
+ FDD_Reconfigure(0);
+
+ // Reset Primary FDD Controller
+ if( FDD_Reset(0) != 0 ) {
+ return MODULE_ERR_MISC;
+ }
+
+ #if 0
+ {
+ int retries;
+ // Recalibrate disks
+ LOG("Recalibrate disks (16x seek)");
+ retries = 16;
+ while(FDD_int_SeekTrack(0, 0, 1) == 0 && retries --)
+ Threads_Yield(); // set track
+ if(retries < 0) LEAVE_RET('i', -1);
+
+ retries = 16;
+ while(FDD_int_SeekTrack(0, 1, 1) == 0 && retries --)
+ Threads_Yield(); // set track
+ if(retries < 0) LEAVE_RET('i', -1);
+ }
+ #endif
+
+
+ // 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(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;
+
+ Buffer = (void*)( (tVAddr)Buffer + 512 );
+ SectorAddr ++;
+ ret ++;
+ }
+ return ret;
+}
+
+int FDD_int_ReadWriteSector(Uint32 Disk, Uint64 SectorAddr, int Write, void *Buffer)
+{
+ int cyl, head, sec;
+ int spt, base;
+ int i;
+ int lba = SectorAddr;
+ Uint8 st0=0, st1=0, st2=0, bps=0; // Status Values
+
+ ENTER("iDisk XSectorAddr pBuffer", Disk, SectorAddr, Buffer);
+
+ base = cPORTBASE[Disk >> 1];
+
+ LOG("Calculating Disk Dimensions");
+ // Get CHS position
+ if(FDD_int_GetDims(gFDD_Devices[Disk].type, lba, &cyl, &head, &sec, &spt) != 1)
+ {
+ LEAVE('i', -1);
+ return -1;
+ }
+ LOG("Cyl=%i, Head=%i, Sector=%i", cyl, head, sec);
+
+ // Start the motor
+ Mutex_Acquire(&glFDD); // Lock to stop the motor stopping on us
+ Time_RemoveTimer(gFDD_Devices[Disk].timer); // Remove Old Timer
+ // Start motor if needed
+ if(gFDD_Devices[Disk].motorState != 2) FDD_int_StartMotor(Disk);
+ Mutex_Release(&glFDD);
+
+ // Wait for spinup
+ LOG("Wait for the motor to spin up");
+ while(gFDD_Devices[Disk].motorState == 1) Threads_Yield();
+
+ LOG("Acquire Spinlock");
+ Mutex_Acquire(&glFDD);
+
+ // Read Data from DMA
+ LOG("Setting DMA for read");
+ DMA_SetChannel(2, 512, !Write); // Read/Write 512 Bytes from channel 2
+
+ LOG("Sending command");
+
+ #define SENDB(__data) if(FDD_int_SendByte(base, __data)) { FDD_Reset(Disk >> 1); continue; }
+
+ for( i = 0; i < FDD_MAX_READWRITE_ATTEMPTS; i ++ )
+ {
+ FDD_int_SeekTrack(Disk, head, cyl);
+ if( Write ) {
+ SENDB(CMD_WRITE_DATA|CMD_FLAG_MFM_ENCODING);
+ }
+ else {
+ SENDB(CMD_READ_DATA|CMD_FLAG_MFM_ENCODING);
+ }
+ SENDB( (head << 2) | (Disk&1) );
+ SENDB(cyl & 0xFF);
+ SENDB(head & 0xFF);
+ SENDB(sec & 0xFF);
+ SENDB(0x02); // Bytes Per Sector (Real BPS=128*2^{val})
+ SENDB(spt); // SPT
+ SENDB(0x1B); // Gap Length (27 is default)
+ SENDB(0xFF); // Data Length
+
+ // Wait for IRQ
+ if( Write ) {
+ LOG("Writing Data");
+ DMA_WriteData(2, 512, Buffer);
+ LOG("Waiting for Data to be written");
+ if( FDD_WaitIRQ() ) { FDD_Reset(Disk>>1); continue; }
+ }
+ else {
+ LOG("Waiting for data to be read");
+ if( FDD_WaitIRQ() ) { FDD_Reset(Disk>>1); continue; }
+ LOG("Reading Data");
+ DMA_ReadData(2, 512, Buffer);
+ }
+
+ // Clear Input Buffer
+ LOG("Clearing Input Buffer");
+ // Status Values
+ FDD_int_GetByte(base, &st0);
+ FDD_int_GetByte(base, &st1);
+ FDD_int_GetByte(base, &st2);
+
+ // Cylinder, Head and Sector (mutilated in some way)
+ FDD_int_GetByte(base, NULL); // Cylinder
+ FDD_int_GetByte(base, NULL); // Head
+ FDD_int_GetByte(base, NULL); // Sector
+ // Should be the BPS set above (0x02)
+ FDD_int_GetByte(base, &bps);
+
+ // Check Status
+ // - Error Code
+ if(st0 & 0xC0) {
+ LOG("Error (st0 & 0xC0) \"%s\"", cFDD_STATUSES[st0 >> 6]);
+ continue;
+ }
+ // - Status Flags
+ if(st0 & 0x08) { LOG("Drive not ready"); continue; }
+ if(st1 & 0x80) { LOG("End of Cylinder"); continue; }
+ if(st1 & 0x20) { LOG("CRC Error"); continue; }
+ if(st1 & 0x10) { LOG("Controller Timeout"); continue; }
+ if(st1 & 0x04) { LOG("No Data Found"); continue; }
+ if(st1 & 0x01 || st2 & 0x01) {
+ LOG("No Address mark found");
+ continue;
+ }
+ if(st2 & 0x40) { LOG("Deleted address mark"); continue; }
+ if(st2 & 0x20) { LOG("CRC error in data"); continue; }
+ if(st2 & 0x10) { LOG("Wrong Cylinder"); continue; }
+ if(st2 & 0x04) { LOG("uPD765 sector not found"); continue; }
+ if(st2 & 0x02) { LOG("Bad Cylinder"); continue; }
+
+ if(bps != 0x2) {
+ LOG("Returned BPS = 0x%02x, not 0x02", bps);
+ continue;
+ }
+
+ if(st1 & 0x02) {
+ LOG("Floppy not writable");
+ // Return error without triggering the attempt count check
+ i = FDD_MAX_READWRITE_ATTEMPTS+1;
+ break;
+ }
+
+ // Success!
+ break;
+ }
+ #undef SENDB
+
+ // Release Spinlock
+ LOG("Realeasing Spinlock and setting motor to stop");
+ Mutex_Release(&glFDD);
+
+ if(i == FDD_MAX_READWRITE_ATTEMPTS) {
+ Log_Warning("FDD", "Exceeded %i attempts in %s the disk",
+ FDD_MAX_READWRITE_ATTEMPTS,
+ (Write ? "writing to" : "reading from")
+ );
+ }
+
+ // Don't turn the motor off now, wait for a while
+ FDD_int_StopMotor(Disk);
+
+ // Error check
+ if( i < FDD_MAX_READWRITE_ATTEMPTS ) {
+ LEAVE('i', 0);
+ return 0;
+ }
+ else {
+ LEAVE('i', 1);
+ return 1;
+ }
+}
+
+/**
+ * \fn int FDD_ReadSector(Uint32 Disk, Uint64 SectorAddr, void *Buffer)
+ * \brief Read a sector from disk
+ * \todo Make real-hardware safe (account for read errors)
+ */
+int FDD_ReadSector(Uint32 Disk, Uint64 SectorAddr, void *Buffer)
+{
+ int ret;
+
+ ENTER("iDisk XSectorAddr pBuffer", Disk, SectorAddr, Buffer);
+
+ if( IOCache_Read( gFDD_Devices[Disk].CacheHandle, SectorAddr, Buffer ) == 1 ) {
+ LEAVE('i', 1);
+ return 1;
+ }
+
+ // Pass to general function
ret = FDD_int_ReadWriteSector(Disk, SectorAddr, 0, Buffer);
-\r
- if( ret == 0 ) {\r
+
+ if( ret == 0 ) {
IOCache_Add( gFDD_Devices[Disk].CacheHandle, SectorAddr, Buffer );
- LEAVE('i', 1);\r
- return 1;\r
- }\r
- else {\r
- LOG("Reading failed");\r
- LEAVE('i', 0);\r
- return 0;\r
- }\r
-}\r
-\r
-/**\r
- * \fn int FDD_WriteSector(Uint32 Disk, Uint64 LBA, void *Buffer)\r
- * \brief Write a sector to the floppy disk\r
- * \note Not Implemented\r
- */\r
-int FDD_WriteSector(Uint32 Disk, Uint64 LBA, void *Buffer)\r
-{\r
- Warning("[FDD ] Read Only at the moment");\r
- return -1;\r
-}\r
-\r
-/**\r
- * \fn int FDD_int_SeekTrack(int disk, int track)\r
- * \brief Seek disk to selected track\r
- */\r
-int FDD_int_SeekTrack(int disk, int head, int track)\r
-{\r
- Uint8 sr0, cyl;\r
- int base;\r
- \r
- base = cPORTBASE[disk>>1];\r
- \r
- // Check if seeking is needed\r
- if(gFDD_Devices[disk].track[head] == track)\r
- return 1;\r
- \r
- // - Seek Head 0\r
- FDD_int_SendByte(base, SEEK_TRACK);\r
- FDD_int_SendByte(base, (head<<2)|(disk&1));\r
- FDD_int_SendByte(base, track); // Send Seek command\r
- FDD_WaitIRQ();\r
- FDD_SensInt(base, &sr0, &cyl); // Wait for IRQ\r
- if((sr0 & 0xF0) != 0x20) {
- LOG("sr0 = 0x%x", sr0);
- return 0; //Check Status
- }\r
- if(cyl != track) return 0;\r
- \r
- // Set Track in structure\r
- gFDD_Devices[disk].track[head] = track;\r
- return 1;\r
-}\r
-\r
-/**\r
- * \fn int FDD_int_GetDims(int type, int lba, int *c, int *h, int *s, int *spt)\r
- * \brief Get Dimensions of a disk\r
- */\r
-int FDD_int_GetDims(int type, int lba, int *c, int *h, int *s, int *spt)\r
-{\r
- switch(type) {\r
- case 0:\r
- return 0;\r
- \r
- // 360Kb 5.25"\r
- case 1:\r
- *spt = 9;\r
- *s = (lba % 9) + 1;\r
- *c = lba / 18;\r
- *h = (lba / 9) & 1;\r
- break;\r
- \r
- // 1220Kb 5.25"\r
- case 2:\r
- *spt = 15;\r
- *s = (lba % 15) + 1;\r
- *c = lba / 30;\r
- *h = (lba / 15) & 1;\r
- break;\r
- \r
- // 720Kb 3.5"\r
- case 3:\r
- *spt = 9;\r
- *s = (lba % 9) + 1;\r
- *c = lba / 18;\r
- *h = (lba / 9) & 1;\r
- break;\r
- \r
- // 1440Kb 3.5"\r
- case 4:\r
- *spt = 18;\r
- *s = (lba % 18) + 1;\r
- *c = lba / 36;\r
- *h = (lba / 18) & 1;\r
- //Log("1440k - lba=%i(0x%x), *s=%i,*c=%i,*h=%i", lba, lba, *s, *c, *h);\r
- break;\r
- \r
- // 2880Kb 3.5"\r
- case 5:\r
- *spt = 36;\r
- *s = (lba % 36) + 1;\r
- *c = lba / 72;\r
- *h = (lba / 32) & 1;\r
- break;\r
- \r
- default:\r
- return -2;\r
- }\r
- return 1;\r
-}\r
-\r
-/**\r
- * \fn void FDD_IRQHandler(int Num)\r
- * \brief Handles IRQ6\r
- */\r
-void FDD_IRQHandler(int Num)\r
-{\r
- gbFDD_IrqFired = 1;\r
-}\r
-\r
-/**\r
- * \fn FDD_WaitIRQ()\r
- * \brief Wait for an IRQ6\r
- */\r
-inline void FDD_WaitIRQ()\r
-{\r
- // Wait for IRQ\r
- while(!gbFDD_IrqFired) Threads_Yield();\r
- gbFDD_IrqFired = 0;\r
-}\r
-\r
-void FDD_SensInt(int base, Uint8 *sr0, Uint8 *cyl)\r
-{\r
- FDD_int_SendByte(base, CHECK_INTERRUPT_STATUS);\r
- if(sr0) *sr0 = FDD_int_GetByte(base);\r
- else FDD_int_GetByte(base);\r
- if(cyl) *cyl = FDD_int_GetByte(base);\r
- else FDD_int_GetByte(base);\r
-}\r
-\r
-/**\r
- * void FDD_int_SendByte(int base, char byte)\r
- * \brief Sends a command to the controller\r
- */\r
-void FDD_int_SendByte(int base, char byte)\r
-{\r
- volatile int state;\r
- int timeout = 128;\r
- for( ; timeout--; )\r
- {\r
- state = inb(base + PORT_MAINSTATUS);\r
- if ((state & 0xC0) == 0x80)\r
- {\r
- outb(base + PORT_DATA, byte);\r
- return;\r
- }\r
- inb(0x80); //Delay\r
- }\r
- \r
- #if WARN\r
- Warning("FDD_int_SendByte - Timeout sending byte 0x%x to base 0x%x\n", byte, base);\r
- #endif\r
-}\r
-\r
-/**\r
- * int FDD_int_GetByte(int base, char byte)\r
- * \brief Receive data from fdd controller\r
- */\r
-int FDD_int_GetByte(int base)\r
-{\r
- volatile int state;\r
- int timeout;\r
- for( timeout = 128; timeout--; )\r
- {\r
- state = inb((base + PORT_MAINSTATUS));\r
- if ((state & 0xd0) == 0xd0)\r
- return inb(base + PORT_DATA);\r
- inb(0x80);\r
- }\r
- return -1;\r
-}\r
-\r
-/**\r
- * \brief Recalibrate the specified disk\r
- */\r
-void FDD_Recalibrate(int disk)\r
-{\r
- ENTER("idisk", disk);\r
- \r
- LOG("Starting Motor");\r
- FDD_int_StartMotor(disk);\r
- // Wait for Spinup\r
- while(gFDD_Devices[disk].motorState == 1) Threads_Yield();\r
- \r
- LOG("Sending Calibrate Command");\r
- FDD_int_SendByte(cPORTBASE[disk>>1], CALIBRATE_DRIVE);\r
- FDD_int_SendByte(cPORTBASE[disk>>1], disk&1);\r
- \r
- LOG("Waiting for IRQ");\r
- FDD_WaitIRQ();\r
- FDD_SensInt(cPORTBASE[disk>>1], NULL, NULL);\r
- \r
- LOG("Stopping Motor");\r
- FDD_int_StopMotor(disk);\r
- LEAVE('-');\r
-}\r
-\r
-/**\r
- * \brief Reset the specified FDD controller\r
- */\r
-void FDD_Reset(int id)\r
-{\r
- int base = cPORTBASE[id];\r
- \r
- ENTER("iID", id);\r
- \r
- outb(base + PORT_DIGOUTPUT, 0); // Stop Motors & Disable FDC\r
- outb(base + PORT_DIGOUTPUT, 0x0C); // Re-enable FDC (DMA and Enable)\r
- \r
- LOG("Awaiting IRQ");\r
- \r
- FDD_WaitIRQ();\r
- FDD_SensInt(base, NULL, NULL);\r
- \r
- LOG("Setting Driver Info");\r
- outb(base + PORT_DATARATE, 0); // Set data rate to 500K/s\r
- FDD_int_SendByte(base, FIX_DRIVE_DATA); // Step and Head Load Times\r
- FDD_int_SendByte(base, 0xDF); // Step Rate Time, Head Unload Time (Nibble each)\r
- FDD_int_SendByte(base, 0x02); // Head Load Time >> 1\r
- while(FDD_int_SeekTrack(0, 0, 1) == 0); // set track\r
- while(FDD_int_SeekTrack(0, 1, 1) == 0); // set track\r
- \r
- LOG("Recalibrating Disk");\r
- FDD_Recalibrate((id<<1)|0);\r
+ LEAVE('i', 1);
+ return 1;
+ }
+ else {
+ LOG("Reading failed");
+ LEAVE('i', 0);
+ return 0;
+ }
+}
+
+/**
+ * \fn int FDD_WriteSector(Uint32 Disk, Uint64 LBA, void *Buffer)
+ * \brief Write a sector to the floppy disk
+ * \note Not Implemented
+ */
+int FDD_WriteSector(Uint32 Disk, Uint64 LBA, void *Buffer)
+{
+ Log_Warning("FDD", "Read Only at the moment");
+ return -1;
+}
+
+/**
+ * \brief Seek disk to selected track
+ */
+int FDD_int_SeekTrack(int disk, int head, int track)
+{
+ Uint8 sr0=0, cyl=0;
+ int base, i, bUnclean;
+
+ base = cPORTBASE[disk>>1];
+
+ // Check if seeking is needed
+ if(gFDD_Devices[disk].track[head] == track)
+ return 1;
+
+ // - Seek Head 0
+ for( i = 0; i < FDD_MAX_READWRITE_ATTEMPTS; i ++ )
+ {
+ if(i && bUnclean) FDD_Reset(disk >> 1);
+ bUnclean = 1;
+ if(FDD_int_SendByte(base, CMD_SEEK_TRACK)) continue;
+ if(FDD_int_SendByte(base, (head<<2)|(disk&1))) continue;
+ if(FDD_int_SendByte(base, track)) continue;
+ FDD_WaitIRQ();
+ FDD_SenseInt(base, &sr0, &cyl); // Wait for IRQ
+
+ bUnclean = 0;
+ if( cyl != track )
+ continue; // Try again
+ if( (sr0 & 0xF0) != 0x20 ) {
+ LOG("sr0 = 0x%x", sr0);
+ continue ;
+ }
+
+ break;
+ }
+
+ if( i == FDD_MAX_READWRITE_ATTEMPTS ) {
+ Log_Warning("FDD", "Unable to seek to track %i on disk %i",
+ track, disk);
+ return 0;
+ }
+
+ // Set Track in structure
+ gFDD_Devices[disk].track[head] = track;
+
+ LOG("Time_Delay(100)");
+ // Wait for Head to settle
+ Time_Delay(100);
+
+ return 1;
+}
+
+/**
+ * \fn int FDD_int_GetDims(int type, int lba, int *c, int *h, int *s, int *spt)
+ * \brief Get Dimensions of a disk
+ */
+int FDD_int_GetDims(int type, int lba, int *c, int *h, int *s, int *spt)
+{
+ switch(type) {
+ case 0:
+ return 0;
+
+ // 360Kb 5.25"
+ case 1:
+ *spt = 9;
+ *s = (lba % 9) + 1;
+ *c = lba / 18;
+ *h = (lba / 9) & 1;
+ break;
+
+ // 1220Kb 5.25"
+ case 2:
+ *spt = 15;
+ *s = (lba % 15) + 1;
+ *c = lba / 30;
+ *h = (lba / 15) & 1;
+ break;
+
+ // 720Kb 3.5"
+ case 3:
+ *spt = 9;
+ *s = (lba % 9) + 1;
+ *c = lba / 18;
+ *h = (lba / 9) & 1;
+ break;
+
+ // 1440Kb 3.5"
+ case 4:
+ *spt = 18;
+ *s = (lba % 18) + 1;
+ *c = lba / 36;
+ *h = (lba / 18) & 1;
+ //Log("1440k - lba=%i(0x%x), *s=%i,*c=%i,*h=%i", lba, lba, *s, *c, *h);
+ break;
+
+ // 2880Kb 3.5"
+ case 5:
+ *spt = 36;
+ *s = (lba % 36) + 1;
+ *c = lba / 72;
+ *h = (lba / 32) & 1;
+ break;
+
+ default:
+ return -2;
+ }
+ return 1;
+}
+
+/**
+ * \fn void FDD_IRQHandler(int Num)
+ * \brief Handles IRQ6
+ */
+void FDD_IRQHandler(int Num, void *Ptr)
+{
+ gbFDD_IrqFired = 1;
+}
+
+/**
+ * \brief Wait for the FDD IRQ to fire
+ * \return Boolean failure (1 for timeout)
+ */
+inline int FDD_WaitIRQ()
+{
+ tTime end = now() + 2000;
+
+ // Wait for IRQ
+ while(!gbFDD_IrqFired && now() < end)
+ Threads_Yield();
+
+ if( !gbFDD_IrqFired ) {
+ Log_Warning("FDD", "FDD_WaitIRQ - Timeout");
+ return 1;
+ }
+
+ gbFDD_IrqFired = 0;
+ return 0;
+}
+
+void FDD_SenseInt(int base, Uint8 *sr0, Uint8 *cyl)
+{
+ FDD_int_SendByte(base, CMD_SENSE_INTERRUPT);
+ FDD_int_GetByte(base, sr0);
+ FDD_int_GetByte(base, cyl);
+}
+
+/**
+ * void FDD_int_SendByte(int base, char byte)
+ * \brief Sends a command to the controller
+ */
+int FDD_int_SendByte(int base, Uint8 byte)
+{
+ tTime end = now() + 1000; // 1s
+
+ while( (inb(base + PORT_MAINSTATUS) & 0x80) != 0x80 && now() < end )
+ Threads_Yield(); //Delay
+// Time_Delay(10); //Delay
+
+ if( inb(base + PORT_MAINSTATUS) & 0x40 ) {
+ Log_Warning("FDD", "FDD_int_SendByte: DIO set, is this ok?");
+ return -2;
+ }
+
+ if( now() > end )
+ {
+ Log_Warning("FDD", "FDD_int_SendByte: Timeout sending byte 0x%x to base 0x%x", byte, base);
+ return 1;
+ }
+ outb(base + PORT_DATA, byte);
+// Log_Debug("FDD", "FDD_int_SendByte: Sent 0x%02x to 0x%x", byte, base);
+ return 0;
+}
+
+/**
+ * int FDD_int_GetByte(int base, char byte)
+ * \brief Receive data from fdd controller
+ */
+int FDD_int_GetByte(int base, Uint8 *value)
+{
+ tTime end = now() + 1000; // 1s
+
+ while( (inb(base + PORT_MAINSTATUS) & 0x80) != 0x80 && now() < end )
+ Time_Delay(10);
+
+ if( !(inb(base + PORT_MAINSTATUS) & 0x40) ) {
+ Log_Warning("FDD", "FDD_int_GetByte: DIO unset, is this ok?");
+ return -2;
+ }
+
+ if( now() > end )
+ {
+ Log_Warning("FDD", "FDD_int_GetByte: Timeout reading byte from base 0x%x", base);
+ return -1;
+ }
+
+ if(value)
+ *value = inb(base + PORT_DATA);
+ else
+ inb(base + PORT_DATA);
+ return 0;
+}
+
+/**
+ * \brief Recalibrate the specified disk
+ */
+void FDD_Recalibrate(int disk)
+{
+ ENTER("idisk", disk);
+
+ LOG("Starting Motor");
+ FDD_int_StartMotor(disk);
+ // Wait for Spinup
+ while(gFDD_Devices[disk].motorState <= 1) Threads_Yield();
+
+ LOG("Sending Calibrate Command");
+ FDD_int_SendByte(cPORTBASE[disk>>1], CMD_RECALIBRATE);
+ FDD_int_SendByte(cPORTBASE[disk>>1], disk&1);
+
+ LOG("Waiting for IRQ");
+ FDD_WaitIRQ();
+ FDD_SenseInt(cPORTBASE[disk>>1], NULL, NULL);
+
+ LOG("Stopping Motor");
+ FDD_int_StopMotor(disk);
+ LEAVE('-');
+}
+
+/**
+ * \brief Reconfigure the controller
+ */
+int FDD_Reconfigure(int ID)
+{
+ Uint16 base = cPORTBASE[ID];
+
+ ENTER("iID", ID);
+
+ FDD_int_SendByte(base, CMD_CONFIGURE);
+ FDD_int_SendByte(base, 0);
+ // Implied seek enabled, FIFO Enabled, Drive Polling Disabled, data buffer threshold 8 bytes
+ FDD_int_SendByte(base, (1 << 6) | (0 << 5) | (0 << 4) | 7);
+ FDD_int_SendByte(base, 0); // Precompensation - use default
+
+ // Commit
+ FDD_int_SendByte(base, CMD_LOCK|CMD_FLAG_MULTI_TRACK);
+ FDD_int_GetByte(base, NULL);
+
+ LEAVE('i', 0);
+ return 0;
+}
+
+/**
+ * \brief Reset the specified FDD controller
+ */
+int FDD_Reset(int id)
+{
+ Uint16 base = cPORTBASE[id];
+ Uint8 motor_state;
+
+ ENTER("iID", id);
+
+ // Reset the card
+ motor_state = inb(base + PORT_DIGOUTPUT) & 0xF0;
+ outb(base + PORT_DIGOUTPUT, motor_state|0); // Disable FDC
+ Time_Delay(1);
+ outb(base + PORT_DIGOUTPUT, motor_state|8|4); // Re-enable FDC (DMA and Enable)
+
+ // Set the data rate
+ outb(base + PORT_DATARATE, 0); // Set data rate to 500K/s
+
+ // Wait for IRQ
+ LOG("Awaiting IRQ");
+
+ FDD_WaitIRQ();
+
+ FDD_SenseInt(base, NULL, NULL);
+
+ // Specify
+ FDD_int_SendByte(base, CMD_SPECIFY); // Step and Head Load Times
+ FDD_int_SendByte(base, 0xDF); // Step Rate Time, Head Unload Time (Nibble each)
+ FDD_int_SendByte(base, 0x02); // Head Load Time >> 1
+
+ LOG("Recalibrating Disk");
+ FDD_Recalibrate((id<<1)|0);
FDD_Recalibrate((id<<1)|1);
-\r
- LEAVE('-');\r
-}\r
-\r
-/**\r
- * \fn void FDD_int_TimerCallback()\r
- * \brief Called by timer\r
- */\r
-void FDD_int_TimerCallback(int arg)\r
-{\r
- ENTER("iarg", arg);\r
- if(gFDD_Devices[arg].motorState == 1)\r
- gFDD_Devices[arg].motorState = 2;\r
- Time_RemoveTimer(gFDD_Devices[arg].timer);\r
- gFDD_Devices[arg].timer = -1;\r
- LEAVE('-');\r
-}\r
-\r
-/**\r
- * \fn void FDD_int_StartMotor(char disk)\r
- * \brief Starts FDD Motor\r
- */\r
-void FDD_int_StartMotor(int disk)\r
-{\r
- Uint8 state;\r
- state = inb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT );\r
- state |= 1 << (4+disk);\r
- outb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT, state );\r
- gFDD_Devices[disk].motorState = 1;\r
- gFDD_Devices[disk].timer = Time_CreateTimer(MOTOR_ON_DELAY, FDD_int_TimerCallback, (void*)disk);\r
-}\r
-\r
-/**\r
- * \fn void FDD_int_StopMotor(int disk)\r
- * \brief Stops FDD Motor\r
- */\r
-void FDD_int_StopMotor(int disk)\r
-{\r
- Uint8 state;\r
- if( IS_LOCKED(&glFDD) ) return ;\r
- ENTER("iDisk", disk);\r
- \r
- state = inb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT );\r
- state &= ~( 1 << (4+disk) );\r
- outb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT, state );\r
- gFDD_Devices[disk].motorState = 0;\r
- LEAVE('-');\r
-}\r
+
+ LEAVE_RET('i', 0);
+}
+
+/**
+ * \fn void FDD_int_TimerCallback()
+ * \brief Called by timer
+ */
+void FDD_int_TimerCallback(void *Arg)
+{
+ int disk = (Uint)Arg;
+ ENTER("iarg", disk);
+ if(gFDD_Devices[disk].motorState == 1)
+ gFDD_Devices[disk].motorState = 2;
+ Time_RemoveTimer(gFDD_Devices[disk].timer);
+ gFDD_Devices[disk].timer = -1;
+ LEAVE('-');
+}
+
+/**
+ * \fn void FDD_int_StartMotor(char disk)
+ * \brief Starts FDD Motor
+ */
+void FDD_int_StartMotor(int disk)
+{
+ Uint8 state;
+ if( gFDD_Devices[disk].motorState != 0 ) return ;
+ // Set motor ON bit
+ state = inb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT );
+ state |= 1 << (4+disk);
+ outb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT, state );
+ // Mark as spinning up
+ gFDD_Devices[disk].motorState = 1;
+ // Schedule a timer for when it's up to speed
+ gFDD_Devices[disk].timer = Time_CreateTimer(MOTOR_ON_DELAY, FDD_int_TimerCallback, (void*)(Uint)disk);
+}
+
+/**
+ * \brief Schedule the drive motor to stop
+ * \param Disk Disk number to stop
+ */
+void FDD_int_StopMotor(int Disk)
+{
+ // Ignore if the motor is aready off
+ if( gFDD_Devices[Disk].motorState == 0 ) return ;
+
+ // Don't double-schedule timer
+ if( gFDD_Devices[Disk].timer != -1 )
+ {
+ Time_RemoveTimer( gFDD_Devices[Disk].timer );
+ }
+
+ gFDD_Devices[Disk].timer = Time_CreateTimer(MOTOR_OFF_DELAY, FDD_int_StopMotorCallback, (void*)(Uint)Disk);
+}
+
+/**
+ * \brief Stops FDD Motor
+ */
+void FDD_int_StopMotorCallback(void *Arg)
+{
+ Uint8 state, disk = (Uint)Arg;
+
+ // Mutex is only locked if disk is in use
+ if( Mutex_IsLocked(&glFDD) ) return ;
+
+ ENTER("iDisk", disk);
+
+ // Clear motor on bit
+ state = inb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT );
+ state &= ~( 1 << (4+disk) );
+ outb( cPORTBASE[ disk>>1 ] + PORT_DIGOUTPUT, state );
+
+ // Mark as off
+ gFDD_Devices[disk].motorState = 0;
+
+ LEAVE('-');
+}
+
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au