device.h

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/****************************************************************/
/*                                                              */
/*                           device.h                           */
/*                      Device Driver Header File               */
/*                                                              */
/*                       November 20, 1991                      */
/*                                                              */
/*                      Copyright (c) 1995                      */
/*                      Pasquale J. Villani                     */
/*                      All Rights Reserved                     */
/*                                                              */
/* This file is part of DOS-C.                                  */
/*                                                              */
/* DOS-C is free software; you can redistribute it and/or       */
/* modify it under the terms of the GNU General Public License  */
/* as published by the Free Software Foundation; either version */
/* 2, or (at your option) any later version.                    */
/*                                                              */
/* DOS-C is distributed in the hope that it will be useful, but */
/* WITHOUT ANY WARRANTY; without even the implied warranty of   */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See    */
/* the GNU General Public License for more details.             */
/*                                                              */
/* You should have received a copy of the GNU General Public    */
/* License along with DOS-C; see the file COPYING.  If not,     */
/* write to the Free Software Foundation, 675 Mass Ave,         */
/* Cambridge, MA 02139, USA.                                    */
/****************************************************************/



/* $Logfile:   C:/dos-c/hdr/device.h_v  $ */
#ifdef MAIN
# ifdef VERSION_STRINGS
static BYTE *device_hRcsId = "$Header:   C:/dos-c/hdr/device.h_v   1.7   11 Jan 1998  2:05:54   patv  $";
# endif
#endif

/* $Log:   C:/dos-c/hdr/device.h_v  $
 *	
 *	   Rev 1.7   11 Jan 1998  2:05:54   patv
 *	Added functionality to ioctl.
 *	
 *	   Rev 1.6   04 Jan 1998 23:14:20   patv
 *	Changed Log for strip utility
 *	
 *	   Rev 1.5   16 Jan 1997 12:46:06   patv
 *	pre-Release 0.92 feature additions
 *      
 *         Rev 1.4   29 May 1996 21:25:12   patv
 *      bug fixes for v0.91a
 *      
 *         Rev 1.3   19 Feb 1996  3:15:30   patv
 *      Added NLS, int2f and config.sys processing
 *      
 *         Rev 1.2   01 Sep 1995 17:35:40   patv
 *      First GPL release.
 *      
 *         Rev 1.1   30 Jul 1995 20:43:48   patv
 *      Eliminated version strings in ipl
 *      
 *         Rev 1.0   02 Jul 1995 10:39:30   patv
 *      Initial revision.
 */
/* $EndLog$ */

/*
 *      Status Word Bits
 */

#define S_ERROR         0x8000          /* Error bit                    */
#define S_BUSY          0x0200          /* Device busy bit              */
#define S_DONE          0x0100          /* Device operation completed   */
#define S_MASK          0x00ff          /* Mask to extract error code   */


/*
 *      MEDIA Descriptor Byte Bits
 */

#define MD_2SIDE        1               /* MEDIA is two sided           */
#define MD_8SECTOR      2               /* MEDIA is eight sectored      */
#define MD_REMOVABLE    4               /* MEDIA is removable (floppy)  */


/*
 *      Media Return Codes
 */
#define M_CHANGED       -1              /* MEDIA was changed            */
#define M_DONT_KNOW     0               /* MEDIA state unkown           */
#define M_NOT_CHANGED   1               /* MEDIA was not changed        */



/*
 *      Error Return Codes
 */

#define E_WRPRT         0               /* Write Protect                */
#define E_UNIT          1               /* Unknown Unit                 */
#define E_NOTRDY        2               /* Device Not Ready             */
#define E_CMD           3               /* Unknown Command              */
#define E_CRC           4               /* Crc Error                    */
#define E_LENGTH        5               /* Bad Length                   */
#define E_SEEK          6               /* Seek Error                   */
#define E_MEDIA         7               /* Unknown MEDIA                */
#define E_NOTFND        8               /* Sector Not Found             */
#define E_PAPER         9               /* No Paper                     */
#define E_WRITE         10              /* Write Fault                  */
#define E_READ          11              /* Read Fault                   */
#define E_FAILURE       12              /* General Failure              */

/*
 *      Command codes
 */

#define C_INIT          0x00            /* Initialize                   */
#define C_MEDIACHK      0x01            /* MEDIA Check                  */
#define C_BLDBPB        0x02            /* Build BPB                    */
#define C_IOCTLIN       0x03            /* Ioctl In                     */
#define C_INPUT         0x04            /* Input (Read)                 */
#define C_NDREAD        0x05            /* Non-destructive Read         */
#define C_ISTAT         0x06            /* Input Status                 */
#define C_IFLUSH        0x07            /* Input Flush                  */
#define C_OUTPUT        0x08            /* Output (Write)               */
#define C_OUTVFY        0x09            /* Output with verify           */
#define C_OSTAT         0x0a            /* Output                       */
#define C_OFLUSH        0x0b            /* Output Flush                 */
#define C_IOCTLOUT      0x0c            /* Ioctl Out                    */
#define C_OPEN          0x0d            /* Device Open                  */
#define C_CLOSE         0x0e            /* Device Close                 */
#define C_REMMEDIA      0x0f            /* Removable MEDIA              */
#define C_OUB           0x10            /* Output till busy             */
#define C_GENIOCTL      0x13            /* Generic Ioctl                */
#define C_GETLDEV       0x17            /* Get Logical Device           */
#define C_SETLDEV       0x18            /* Set Logical Device           */
#define C_IOCTLQRY      0x19            /* Ioctl Query                  */


/*
 *      Convienence macros
 */
#define failure(x)      (S_ERROR+S_DONE+x)
#ifndef TRUE
#define TRUE            1
#endif
#ifndef FALSE
#define FALSE           0
#endif
#define mk_offset(far_ptr)      ((UWORD)(far_ptr))
#define mk_segment(far_ptr) ((UWORD)((ULONG)(far_ptr) >> 16))
#define far_ptr(seg, off) ((VOID FAR *)(((ULONG)(off))+((ULONG)(seg) << 16)))



/*
 *      structures
 */


/* Device header */

struct dhdr
{
	struct dhdr
		FAR     *dh_next;
	UWORD           dh_attr;
	VOID            (*dh_strategy)();
	VOID            (*dh_interrupt)();
	BYTE            dh_name[8];
};

#define ATTR_CHAR       0x8000
#define ATTR_IOCTL	0x4000
#define ATTR_EXCALLS    0x0800
#define ATTR_QRYIOCTL	0x0080
#define ATTR_GENIOCTL	0x0040
#define ATTR_RAW        0x0400
#define ATTR_FASTCON    0x0010
#define ATTR_CLOCK      0x0008
#define ATTR_NULL       0x0004
#define ATTR_STDOUT     0x0002
#define ATTR_STDIN      0x0001

/*                                                                      */
/* Bios Parameter Block structure                                       */
/*                                                                      */
/* The following offsets are computed as byte offsets and are based on  */
/* the struct below. The struct itself cannot be used because on some   */
/* compilers, structure alignement may be forced, throwing following    */
/* fields off (e.g. - BYTE, followed by a WORD may have a byte of fill  */
/* inserted in between; the WORD would then be at offset 2, not 1).     */
/*                                                                      */
#define BPB_NBYTE       0
#define BPB_NSECTOR     2
#define BPB_NRESERVED   3
#define BPB_NFAT        5
#define BPB_NDIRENT     6
#define BPB_NSIZE       8