//*****************************************************************
//
// File Name	: 'ata_if.h'
// Title			: IDE-ATA interface driver
// Author		: Pascal Stang
// Date			: 11/22/2000
// Version		: 0.1
// Target MCU	: ATmega103
// Editor Tabs	: 3
//
//*****************************************************************


// constants
#define CTRL     0
#define CMD      1
#define DRIVE0   0

#define STANDBY	0
#define SLEEP	1
#define IDLE	2

// ATA status register bits
#define ATA_SR_BSY			0x80
#define ATA_SR_DRDY		0x40
#define ATA_SR_DF			0x20
#define ATA_SR_DSC			0x10
#define ATA_SR_DRQ			0x08
#define ATA_SR_CORR		0x04
#define ATA_SR_IDX			0x02
#define ATA_SR_ERR			0x01

// ATA error register bits
#define ATA_ER_UNC			0x40
#define ATA_ER_MC			0x20
#define ATA_ER_IDNF		0x10
#define ATA_ER_MCR			0x08
#define ATA_ER_ABRT		0x04
#define ATA_ER_TK0NF		0x02
#define ATA_ER_AMNF		0x01

// ATA registers
#define ATA_REG_BASE			0x8000
#define ATA_REG_DATAL		0x00
#define ATA_REG_ERROR		0x01
#define ATA_REG_SECCOUNT	0x02
#define ATA_REG_STARTSEC	0x03
#define ATA_REG_CYLLO		0x04
#define ATA_REG_CYLHI		0x05
#define ATA_REG_HDDEVSEL	0x06
#define ATA_REG_CMDSTATUS1	0x07
#define ATA_REG_CMDSTATUS2	0x08
#define ATA_REG_ACTSTATUS	0x09

#define ATA_REG_DATAH		0x10

// ATA commands
#define ATA_CMD_READ				0x20
#define ATA_CMD_READNR			0x21
#define ATA_CMD_WRITE			0x30
#define ATA_CMD_WRITENR			0x31
#define ATA_CMD_IDENTIFY		0xEC
#define ATA_CMD_RECALIBRATE	0x10
#define ATA_CMD_SPINDOWN		0xE0
#define ATA_CMD_SPINUP			0xE1

// ATA CHS disk parameters
//#define ATA_DISKPARM_CLYS		1011
//#define ATA_DISKPARM_HEADS		15
//#define ATA_DISKPARM_SECTORS	22
#define ATA_DISKPARM_CLYS		0x03A6
#define ATA_DISKPARM_HEADS		0x10
#define ATA_DISKPARM_SECTORS	0x11


//----------------------------------------------------------------------------
// Typedefs
//----------------------------------------------------------------------------

/*
typedef struct 
{
  unsigned char Heads; 
  unsigned int Tracks;
  unsigned int SectorsPerTrack;
  char Model[41];
} tdefDriveInfo;
*/


// Prototypes

void ataInit(void);
u08  ataReadByte(u08 reg);
void ataWriteByte(u08 reg, u08 data);
void ataShowRegisters(unsigned char DriveNo);
u08  ataSWReset(void);
void ataDiskErr(void);
void ataPrintSector( u08 *Buffer);
void ataReadDataBuffer(u08 *Buffer, u16 numBytes);
void ataWriteDataBuffer(u08 *Buffer, u16 numBytes);
u08 ataStatusWait(u08 mask, u08 waitStatus);


unsigned char ataReadSectors(		unsigned char Drive, 
											unsigned char Head, 
											unsigned int Track,
											unsigned char Sector,
											unsigned int numsectors,
											unsigned char *Buffer);

unsigned char ataWriteSectors(	unsigned char Drive, 
											unsigned char Head, 
											unsigned int Track,
											unsigned char Sector,
											unsigned int numsectors,
											unsigned char *Buffer);


unsigned char ataReadSectorsLBA(	unsigned char Drive, 
											unsigned long lba,
											unsigned int numsectors,
                            		unsigned char *Buffer);

unsigned char ataWriteSectorsLBA(	unsigned char Drive, 
												unsigned long lba,
												unsigned int numsectors,
                            			unsigned char *Buffer);

unsigned char ataReadSectorsLBAforCHS(	unsigned char Drive, 
													unsigned long lba,
													unsigned int numsectors,
                            				unsigned char *Buffer);

unsigned char ataWriteSectorsLBAforCHS(	unsigned char Drive, 
														unsigned long lba,
														unsigned int numsectors,
                            					unsigned char *Buffer);


//char SetAddress(unsigned char cs, unsigned char adr);
//unsigned int ReadWORD(unsigned char cs, unsigned char adr);
//unsigned char ReadBYTE(unsigned char cs, unsigned char adr);
 
//void WriteWORD(unsigned char cs, unsigned char adr, unsigned int dat);
//void WriteBYTE(unsigned char cs, unsigned char adr, unsigned char dat);

//unsigned char IdentifyDrive(unsigned char DriveNo,  unsigned char *Buffer, tdefDriveInfo *DriveInfo);
/*
unsigned char ATA_Read_Sectors(	unsigned char Drive, 
                				unsigned char Head, 
                				unsigned int Track, 
                				unsigned char Sector,
								unsigned int numsectors,
                				unsigned char *Buffer);

unsigned char ATA_Read_Sectors_LBA(	unsigned char Drive, 
									unsigned long lba,
									unsigned int numsectors,
                            		unsigned char *Buffer);

//unsigned char SetMode(unsigned char DriveNo, unsigned char Mode, unsigned char PwrDown);
*/

//unsigned char ATA_Idle(unsigned char Drive);