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iwm_fdvar.h revision 1.1 
      1 /* $Id: iwm_fdvar.h,v 1.1 1999/02/18 07:38:26 scottr Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1997, 1998 Hauke Fath.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 #ifndef _MAC68K_FDVAR_H
     29 #define _MAC68K_FDVAR_H
     30 
     31 /**
     32  **	Constants
     33  **/
     34 
     35 /* Number of attachable drives */
     36 #define IWM_MAX_DRIVE		2
     37 
     38 /* Number of zones on GCR disk */
     39 #define IWM_GCR_DISK_ZONES	5
     40 
     41 /* Larger than the highest sector number likely */
     42 #define IWM_MAX_FLOPPY_SECT	50
     43 
     44 /* Physical track format codes */
     45 enum {
     46 	IWM_GCR,		/* Apple's Group Code Recording format	 */
     47 	IWM_MFM_DD,		/* Standard MFM on DD disk (250 KBit/s)	 */
     48 	IWM_MFM_HD		/* Standard MFM on HD disk (500 KBit/s)	 */
     49 };
     50 
     51 /* Drive softc flags */
     52 enum {
     53 	IWM_FD_IS_OPEN	= 0x00000001,
     54 	IWM_FD_MOTOR_ON = 0x00000002
     55 };
     56 
     57 /* seek() behaviour */
     58 enum {
     59 	IWM_SEEK_VANILLA,
     60 	IWM_SEEK_RECAL,
     61 	IWM_SEEK_VERIFY
     62 };
     63 
     64 
     65 /**
     66  **	Data Types
     67  **/
     68 
     69 /*
     70  * Floppy disk format information
     71  *
     72  * XXX How to describe ZBR here? UN*X disk drive handling -- clinging
     73  *     tenaciously to the trailing edge of technology...
     74  */
     75 struct fdInfo {
     76 	short	heads;		/* # of heads the drive has	 */
     77 	short	tracks;		/* # of tracks per side (cyl's)	 */
     78 	short	sectorSize;	/* Bytes per sector		 */
     79 	short	secPerTrack;	/* fake				 */
     80 	short	secPerCyl;	/* fake				 */
     81 	short	secPerDisk;	/* # of sectors per __disk__	 */
     82 	short	stepRate;	/* in ms (is a software delay)	 */
     83 	short	interleave;	/* Sector interleave		 */
     84 	short	physFormat;	/* GCR, MFM DD, MFM HD		 */
     85 	char	*description;
     86 };
     87 typedef struct fdInfo fdInfo_t;
     88 
     89 /*
     90  * Current physical location on Sony GCR disk
     91  */
     92 struct diskPosition {
     93 	short	track;
     94 	short	oldTrack;
     95 	short	side;
     96 	short	sector;
     97 	short	maxSect;	/* Highest sector # for this track */
     98 };
     99 typedef struct diskPosition diskPosition_t;
    100 
    101 /*
    102  * Zone recording scheme (per disk surface/head)
    103  */
    104 struct diskZone {
    105 	short	tracks;		/* # of tracks per zone		 */
    106 	short	sectPerTrack;
    107 	short	firstBlock;
    108 	short	lastBlock;
    109 };
    110 typedef struct diskZone diskZone_t;
    111 
    112 /*
    113  * Arguments passed between iwmAttach() and the fd probe routines.
    114  */
    115 struct iwmAttachArgs {
    116 	fdInfo_t *driveType;	/* Default drive parameters     */
    117 	short	unit;		/* Current drive #              */
    118 };
    119 typedef struct iwmAttachArgs iwmAttachArgs_t;
    120 
    121 /*
    122  * Software state per disk: the IWM can have max. 2 drives. Newer
    123  * machines don't even have a port for an external drive.
    124  *
    125  */
    126 struct fd_softc {
    127 	struct device devInfo;	/* generic device info 		 */
    128 	struct disk diskInfo;	/* generic disk info		 */
    129 	struct buf bufQueue;	/* queue of buf's		 */
    130 
    131 /* private stuff here */
    132 	daddr_t	startBlk;	/* Starting block #		 */
    133 	int	bytesLeft;	/* Bytes left to transfer	 */
    134 	int	bytesDone;	/* Bytes transferred		 */
    135 
    136 	int	drvFlags;	/* Copy of drive flags		 */
    137 	short	unit;		/* Drive # as seen by IWM	 */
    138 	short	partition;	/* "Partition" info {a,b,c,...}	 */
    139 	fdInfo_t *defaultType;	/* default floppy format	 */
    140 	fdInfo_t *currentType;	/* current floppy format	 */
    141 	int	state;		/* XXX				 */
    142 	void	*trackBuf;	/* Pointer to track buffer	 */
    143 	short	stepDirection;	/* Current step direction	 */
    144 	diskPosition_t pos;	/* Physical position on disk	 */
    145 	int	writeLabel;	/* Write access to disklabel?	 */
    146 };
    147 typedef struct fd_softc fd_softc_t;
    148 
    149 /*
    150  * Software state of IWM controller
    151  *
    152  * SWIM/MFM mode may have some state to keep here.
    153  */
    154 struct iwm_softc {
    155 	struct device devInfo;	/* generic device info		 */
    156 	int	drives;		/* # of attached fd's		 */
    157 	fd_softc_t *fd[IWM_MAX_DRIVE];	/* ptrs to children	 */
    158 
    159 	int	state;		/* make that an enum?		 */
    160 	u_char	modeReg;	/* Copy of IWM mode register	 */
    161 	short	maxRetries;	/* I/O retries			 */
    162 	int	errors;
    163 	int	underruns;	/* data not delivered in time	 */
    164 };
    165 typedef struct iwm_softc iwm_softc_t;
    166 
    167 
    168 /**
    169  **     Exported functions
    170  **/
    171 
    172 /*
    173  * IWM Loadable Kernel Module : Exported functions
    174  */
    175 #ifdef _LKM
    176 int	fdModInit __P((void));
    177 void	fdModFree __P((void));
    178 #endif
    179 
    180 /*
    181  * This is the exported driver interface
    182  * (bdevsw[] & cdevsw[] function prototypes)
    183  *
    184  * (see <sys/conf.h>
    185  */
    186 dev_type_open(fdopen);
    187 dev_type_close(fdclose);
    188 dev_type_strategy(fdstrategy);
    189 dev_type_read(fdread);
    190 dev_type_write(fdwrite);
    191 dev_type_ioctl(fdioctl);
    192 dev_type_size(fdsize);
    193 dev_type_dump(fddump);
    194 
    195 #endif /* _MAC68K_FDVAR_H */
    196