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GuruMeditation
Docs » Include » devices » trackdisk.h / .i
#ifndef DEVICES_TRACKDISK_H
#define DEVICES_TRACKDISK_H

/*
**
**	$VER: trackdisk.h 33.13 (28.11.1990)
**	Includes Release 45.1
**
**	trackdisk device structure and value definitions
**
**	(C) Copyright 1985-2001 Amiga, Inc.
**	    All Rights Reserved
**
*/

#ifndef EXEC_IO_H
#include <exec/io.h>
#endif

#ifndef EXEC_DEVICES_H
#include <exec/devices.h>
#endif

/*
 *--------------------------------------------------------------------
 *
 * 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 (1<<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_GETGEOMETRY	(CMD_NONSTD+13) /* gets the disk geometry table */
#define TD_EJECT	(CMD_NONSTD+14) /* for those drives that support it */
#define	TD_LASTCOMM	(CMD_NONSTD+15)

/*
 *
 * 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;
};

/*
 *  This is the structure returned by TD_DRIVEGEOMETRY
 *  Note that the layout can be defined three ways:
 *
 *  1. TotalSectors
 *  2. Cylinders and CylSectors
 *  3. Cylinders, Heads, and TrackSectors.
 *
 *  #1 is most accurate, #2 is less so, and #3 is least accurate.  All
 *  are usable, though #2 and #3 may waste some portion of the available
 *  space on some drives.
 */
struct DriveGeometry {
	ULONG	dg_SectorSize;		/* in bytes */
	ULONG	dg_TotalSectors;	/* total # of sectors on drive */
	ULONG	dg_Cylinders;		/* number of cylinders */
	ULONG	dg_CylSectors;		/* number of sectors/cylinder */
	ULONG	dg_Heads;		/* number of surfaces */
	ULONG	dg_TrackSectors;	/* number of sectors/track */
	ULONG	dg_BufMemType;		/* preferred buffer memory type */
					/* (usually MEMF_PUBLIC) */
	UBYTE	dg_DeviceType;		/* codes as defined in the SCSI-2 spec*/
	UBYTE	dg_Flags;		/* flags, including removable */
	UWORD	dg_Reserved;
};

/* device types */
#define DG_DIRECT_ACCESS	0
#define DG_SEQUENTIAL_ACCESS	1
#define DG_PRINTER		2
#define DG_PROCESSOR		3
#define DG_WORM			4
#define DG_CDROM		5
#define DG_SCANNER		6
#define DG_OPTICAL_DISK		7
#define DG_MEDIUM_CHANGER	8
#define DG_COMMUNICATION	9
#define DG_UNKNOWN		31

/* flags */
#define DGB_REMOVABLE		0
#define DGF_REMOVABLE		1

/*
** 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)
/*
** raw read and write can be synced with a $4489 sync pattern.	This flag
** in io request's IO_FLAGS field tells the driver that you want this.
*/
#define IOTDB_WORDSYNC	5
#define IOTDF_WORDSYNC (1<<5)


/* 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
#define	DRIVE3_5_150RPM	3

/*
 *--------------------------------------------------------------------
 *
 * 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 */
	UBYTE	tdu_PubFlags;		/* public flags, see below */
	UWORD	tdu_CurrTrk;		/* track the heads are over... */
					/* ONLY ACCESS WHILE UNIT IS STOPPED! */
	ULONG	tdu_CalibrateDelay;	/* time to wait after stepping */
					/* during a recalibrate */
	ULONG	tdu_Counter;		/* counter for disk changes... */
					/* ONLY ACCESS WHILE UNIT IS STOPPED! */
};

/* flags for tdu_PubFlags */
#define TDPB_NOCLICK	0
#define TDPF_NOCLICK	(1L << 0)

#endif	/* DEVICES_TRACKDISK_H */

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