#ifndef DEVICES_TRACKDISK_H
#define DEVICES_TRACKDISK_H
/*
**	$Filename: devices/trackdisk.h $
**	$Release: 1.3 $
**
**	
**
**	(C) Copyright 1985,1986,1987,1988 Commodore-Amiga, Inc.
**	    All Rights Reserved
*/

#ifndef EXEC_IO_H
#include "exec/io.h"
#endif !EXEC_IO_H

#ifndef EXEC_DEVICES_H
#include "exec/devices.h"
#endif !EXEC_DEVICES_H

/*
 *--------------------------------------------------------------------
 *
 * Physical drive constants
 *
 *--------------------------------------------------------------------
 */

/* OBSOLETE -- use the TD_GETNUMTRACKS command! */
/*#define	NUMCYLS 80*/		/*  normal # of cylinders */
/*#define	MAXCYLS (NUMCYLS+20)*/	/* max # cyls to look for during cal */
/*#define	NUMHEADS 2*/
/*#define	NUMTRACKS (NUMCYLS*NUMHEADS)*/

#define NUMSECS 11
#define NUMUNITS 4

/*
 *--------------------------------------------------------------------
 *
 * Useful constants
 *
 *--------------------------------------------------------------------
 */

/*-- sizes before mfm encoding */
#define TD_SECTOR 512
#define TD_SECSHIFT 9		/* log TD_SECTOR */

/*
 *--------------------------------------------------------------------
 *
 * Driver Specific Commands
 *
 *--------------------------------------------------------------------
 */

/*
 *-- TD_NAME is a generic macro to get the name of the driver.	This
 *-- way if the name is ever changed you will pick up the change
 *-- automatically.
 *--
 *-- Normal usage would be:
 *--
 *-- char internalName[] = TD_NAME;
 *--
 */

#define TD_NAME "trackdisk.device"

#define TDF_EXTCOM (1L<<15)		/* for internal use only! */


#define TD_MOTOR	(CMD_NONSTD+0)	/* control the disk's motor */
#define TD_SEEK		(CMD_NONSTD+1)	/* explicit seek (for testing) */
#define TD_FORMAT	(CMD_NONSTD+2)	/* format disk */
#define TD_REMOVE	(CMD_NONSTD+3)	/* notify when disk changes */
#define TD_CHANGENUM	(CMD_NONSTD+4)	/* number of disk changes */
#define TD_CHANGESTATE	(CMD_NONSTD+5)	/* is there a disk in the drive? */
#define TD_PROTSTATUS	(CMD_NONSTD+6)	/* is the disk write protected? */
#define TD_RAWREAD	(CMD_NONSTD+7)	/* read raw bits from the disk */
#define TD_RAWWRITE	(CMD_NONSTD+8)	/* write raw bits to the disk */
#define TD_GETDRIVETYPE (CMD_NONSTD+9)	/* get the type of the disk drive */
#define TD_GETNUMTRACKS (CMD_NONSTD+10) /* # of tracks for this type drive */
#define TD_ADDCHANGEINT (CMD_NONSTD+11) /* TD_REMOVE done right */
#define TD_REMCHANGEINT (CMD_NONSTD+12) /* remove softint set by ADDCHANGEINT */

#define TD_LASTCOMM	(CMD_NONSTD+13)

/*
 *
 * The disk driver has an "extended command" facility.	These commands
 * take a superset of the normal IO Request block.
 *
 */

#define ETD_WRITE	(CMD_WRITE|TDF_EXTCOM)
#define ETD_READ	(CMD_READ|TDF_EXTCOM)
#define ETD_MOTOR	(TD_MOTOR|TDF_EXTCOM)
#define ETD_SEEK	(TD_SEEK|TDF_EXTCOM)
#define ETD_FORMAT	(TD_FORMAT|TDF_EXTCOM)
#define ETD_UPDATE	(CMD_UPDATE|TDF_EXTCOM)
#define ETD_CLEAR	(CMD_CLEAR|TDF_EXTCOM)
#define ETD_RAWREAD	(TD_RAWREAD|TDF_EXTCOM)
#define ETD_RAWWRITE	(TD_RAWWRITE|TDF_EXTCOM)

/*
 *
 * extended IO has a larger than normal io request block.
 *
 */

struct IOExtTD {
	struct	IOStdReq iotd_Req;
	ULONG	iotd_Count;
	ULONG	iotd_SecLabel;
};

/*
** raw read and write can be synced with the index pulse.  This flag
** in io request's IO_FLAGS field tells the driver that you want this.
*/

#define IOTDB_INDEXSYNC 4
#define IOTDF_INDEXSYNC (1<<4)


/* labels are TD_LABELSIZE bytes per sector */

#define TD_LABELSIZE 16

/*
** This is a bit in the FLAGS field of OpenDevice.  If it is set, then
** the driver will allow you to open all the disks that the trackdisk
** driver understands.	Otherwise only 3.5" disks will succeed.
*/

#define TDB_ALLOW_NON_3_5	0
#define TDF_ALLOW_NON_3_5	(1<<0)

/*
**  If you set the TDB_ALLOW_NON_3_5 bit in OpenDevice, then you don't
**  know what type of disk you really got.  These defines are for the
**  TD_GETDRIVETYPE command.  In addition, you can find out how many
**  tracks are supported via the TD_GETNUMTRACKS command.
*/

#define DRIVE3_5	1
#define DRIVE5_25	2

/*
 *--------------------------------------------------------------------
 *
 * Driver error defines
 *
 *--------------------------------------------------------------------
 */

#define TDERR_NotSpecified	20	/* general catchall */
#define TDERR_NoSecHdr		21	/* couldn't even find a sector */
#define TDERR_BadSecPreamble	22	/* sector looked wrong */
#define TDERR_BadSecID		23	/* ditto */
#define TDERR_BadHdrSum		24	/* header had incorrect checksum */
#define TDERR_BadSecSum		25	/* data had incorrect checksum */
#define TDERR_TooFewSecs	26	/* couldn't find enough sectors */
#define TDERR_BadSecHdr		27	/* another "sector looked wrong" */
#define TDERR_WriteProt		28	/* can't write to a protected disk */
#define TDERR_DiskChanged	29	/* no disk in the drive */
#define TDERR_SeekError		30	/* couldn't find track 0 */
#define TDERR_NoMem		31	/* ran out of memory */
#define TDERR_BadUnitNum	32	/* asked for a unit > NUMUNITS */
#define TDERR_BadDriveType	33	/* not a drive that trackdisk groks */
#define TDERR_DriveInUse	34	/* someone else allocated the drive */
#define TDERR_PostReset		35	/* user hit reset; awaiting doom */

/*
 *--------------------------------------------------------------------
 *
 * public portion of the unit structure
 *
 *--------------------------------------------------------------------
 */

struct TDU_PublicUnit {
	struct	Unit tdu_Unit;		/* base message port */
	UWORD	tdu_Comp01Track;	/* track for first precomp */
	UWORD	tdu_Comp10Track;	/* track for second precomp */
	UWORD	tdu_Comp11Track;	/* track for third precomp */
	ULONG	tdu_StepDelay;		/* time to wait after stepping */
	ULONG	tdu_SettleDelay;	/* time to wait after seeking */
	UBYTE	tdu_RetryCnt;		/* # of times to retry */
};

#endif	/* DEVICES_TRACKDISK_H */