/*
  Hatari - hdc.h

  This file is distributed under the GNU General Public License, version 2
  or at your option any later version. Read the file gpl.txt for details.

  This file contains definitions which are used for hardware-level
  harddrive emulation.
*/

#ifndef HATARI_HDC_H
#define HATARI_HDC_H

#include <sys/types.h>  /* For off_t */

/* Opcodes */
/* The following are multi-sector transfers with seek implied */
#define HD_VERIFY_TRACK    0x05               /* Verify track */
#define HD_FORMAT_TRACK    0x06               /* Format track */
#define HD_READ_SECTOR     0x08               /* Read sector */
#define HD_READ_SECTOR1    0x28               /* Read sector (class 1) */
#define HD_WRITE_SECTOR    0x0A               /* Write sector */
#define HD_WRITE_SECTOR1   0x2A               /* Write sector (class 1) */

/* other codes */
#define HD_TEST_UNIT_RDY   0x00               /* Test unit ready */
#define HD_FORMAT_DRIVE    0x04               /* Format the whole drive */
#define HD_SEEK            0x0B               /* Seek */
#define HD_CORRECTION      0x0D               /* Correction */
#define HD_INQUIRY         0x12               /* Inquiry */
#define HD_MODESELECT      0x15               /* Mode select */
#define HD_MODESENSE       0x1A               /* Mode sense */
#define HD_REQ_SENSE       0x03               /* Request sense */
#define HD_SHIP            0x1B               /* Ship drive */
#define HD_READ_CAPACITY1  0x25               /* Read capacity (class 1) */
#define HD_REPORT_LUNS     0xa0               /* Report Luns */

/* Status codes */
#define HD_STATUS_OK       0x00
#define HD_STATUS_ERROR    0x02
#define HD_STATUS_BUSY     0x08

/* Error codes for REQUEST SENSE: */
#define HD_REQSENS_OK       0x00              /* OK return status */
#define HD_REQSENS_NOSECTOR 0x01              /* No index or sector */
#define HD_REQSENS_WRITEERR 0x03              /* Write fault */
#define HD_REQSENS_OPCODE   0x20              /* Opcode not supported */
#define HD_REQSENS_INVADDR  0x21              /* Invalid block address */
#define HD_REQSENS_INVARG   0x24              /* Invalid argument */
#define HD_REQSENS_INVLUN   0x25              /* Invalid LUN */

/**
 * Information about a ACSI/SCSI drive
 */
typedef struct scsi_data {
	bool enabled;
	FILE *image_file;
	uint32_t nLastBlockAddr;      /* The specified sector number */
	bool bSetLastBlockAddr;
	uint8_t nLastError;
	unsigned long hdSize;       /* Size of the hard disk in sectors */
	unsigned long blockSize;    /* Size of a sector in bytes */
	/* For NCR5380 emulation: */
	int direction;
	uint8_t msgout[4];
	uint8_t cmd[16];
	int cmd_len;
} SCSI_DEV;

/**
 * Status of the ACSI/SCSI bus/controller including the current command block.
 */
typedef struct {
	const char *typestr;        /* "ACSI" or "SCSI" */
	int target;
	int byteCount;              /* number of command bytes received */
	uint8_t command[16];
	uint8_t opcode;
	bool bDmaError;
	short int status;           /* return code from the HDC operation */
	uint8_t *buffer;              /* Response buffer */
	int buffer_size;
	int data_len;
	int offset;                 /* Current offset into data buffer */
	FILE *dmawrite_to_fh;
	SCSI_DEV devs[8];
} SCSI_CTRLR;


extern int nAcsiPartitions;
extern bool bAcsiEmuOn;

/**
 * API.
 */
extern bool HDC_Init(void);
extern void HDC_UnInit(void);
extern int HDC_InitDevice(const char *hdtype, SCSI_DEV *dev, char *filename, unsigned long blockSize);
extern void HDC_ResetCommandStatus(void);
extern short int HDC_ReadCommandByte(int addr);
extern void HDC_WriteCommandByte(int addr, uint8_t byte);
extern int HDC_PartitionCount(FILE *fp, const uint64_t tracelevel, int *pIsByteSwapped);
extern off_t HDC_CheckAndGetSize(const char *hdtype, const char *filename, unsigned long blockSize);
extern bool HDC_WriteCommandPacket(SCSI_CTRLR *ctr, uint8_t b);
extern void HDC_DmaTransfer(void);

#endif /* HATARI_HDC_H */
