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#ifndef DEF_FLOPPYCONTROLLER_CLASS_H
#define DEF_FLOPPYCONTROLLER_CLASS_H
#include <Devices/Device.proto.h>
#include <Mutex.class.h>
#define FLOPPY_DMALEN 0x4800 //This is one cylinder
//Floppy registers
#define FR_DOR 2 //Digital Output Register
#define FR_MSR 4 //Main Status Register
#define FR_FIFO 5
#define FR_CCR 7 //Configuration Control Register
//Floppy commands
#define FC_SPECIFY 3
#define FC_SENSE_DRIVE_STATUS 4
#define FC_WRITE_DATA 5
#define FC_READ_DATA 6
#define FC_RECALIBRATE 7
#define FC_SENSE_INTERRUPT 8
#define FC_SEEK 15
//Floppy drives types
#define FT_NONE 0
#define FT_360K525 1 //360kB 5.25in
#define FT_12M525 2 //1.2MB 5.25in
#define FT_720K35 3 //720kB 3.5in
#define FT_144M35 4 //1.44MB 3.5in
#define FT_288M35 5 //2.88MB 3.5in
//Floppy drive motor states
#define FS_MOTOROFF 0
#define FS_MOTORON 1
#define FS_MOTORWAIT 2
//Floppy transfer directions
#define FD_READ 1
#define FD_WRITE 2
class FloppyDrive;
class FloppyController : public Device {
friend class FloppyDrive;
private:
//For DMA
static Mutex dmaMutex;
static u8int dmabuff[FLOPPY_DMALEN];
static bool dmaInit(u8int direction, u32int length); //Locks the DMA Mutex. Called on each r/w operation.
static void dmaRelease(); //Unlocks the DMA Mutex
//For the FDC
FloppyController(u32int base, u8int irq); //Private constructor, called by Detect();
u8int m_activeDrive;
Mutex m_driveMutex;
u32int m_base; //I/O port base
u8int m_irq;
bool m_first;
bool m_irqHappened;
FloppyDrive* m_drives[2];
void checkInterrupt(int *st0, int *cyl);
void setDOR(); //Updates the Digital Output Register
void setActiveDrive(u8int drive); //Locks driveMutex and sets activeDrive.
void setNoActiveDrive(); //Unlocks driveMutex
bool writeCmd(u8int cmd); //Sends command to controller
u8int readData(); //Reads a byte from controller
bool reset();
void handleIRQ(registers_t regs, int irq);
void resetIrq() { m_irqHappened = false; }
void waitIrq();
public:
static void detect();
String getClass();
String getName();
};
#endif
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