kernel/include/fdc.h

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2007  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #ifndef FDC_H
  21 #define FDC_H
  22
  23 #include "mytypes.h"
  24 #include <partition.h>
  25
  26 /* datatypes */
  27
  28 /* drive geometry */
  29 typedef struct DrvGeom {
  30         char heads;
  31         char tracks;
  32         char spt;     /* sectors per track */
  33 } DrvGeom;
  34
  35 /* drive geometries */
  36 #define DG144_HEADS       2     /* heads per drive (1.44M) */
  37 #define DG144_TRACKS     80     /* number of tracks (1.44M) */
  38 #define DG144_SPT        18     /* sectors per track (1.44M) */
  39 #define DG144_GAP3FMT  0x54     /* gap3 while formatting (1.44M) */
  40 #define DG144_GAP3RW   0x1b     /* gap3 while reading/writing (1.44M) */
  41
  42 #define DG168_HEADS       2     /* heads per drive (1.68M) */
  43 #define DG168_TRACKS     80     /* number of tracks (1.68M) */
  44 #define DG168_SPT        21     /* sectors per track (1.68M) */
  45 #define DG168_GAP3FMT  0x0c     /* gap3 while formatting (1.68M) */
  46 #define DG168_GAP3RW   0x1c     /* gap3 while reading/writing (1.68M) */
  47
  48 /* IO ports */
  49 #define FDC_DOR  (0x3f2)   /* Digital Output Register */
  50 #define FDC_MSR  (0x3f4)   /* Main Status Register (input) */
  51 #define FDC_DRS  (0x3f4)   /* Data Rate Select Register (output) */
  52 #define FDC_DATA (0x3f5)   /* Data Register */
  53 #define FDC_DIR  (0x3f7)   /* Digital Input Register (input) */
  54 #define FDC_CCR  (0x3f7)   /* Configuration Control Register (output) */
  55
  56 /* command bytes (these are 765 commands + options such as MFM, etc) */
  57 #define CMD_SPECIFY (0x03)  /* specify drive timings */
  58 #define CMD_WRITE   (0xc5)  /* write data (+ MT,MFM) */
  59 #define CMD_READ    (0xe6)  /* read data (+ MT,MFM,SK) */
  60 #define CMD_RECAL   (0x07)  /* recalibrate */
  61 #define CMD_SENSEI  (0x08)  /* sense interrupt status */
  62 #define CMD_FORMAT  (0x4d)  /* format track (+ MFM) */
  63 #define CMD_SEEK    (0x0f)  /* seek track */
  64 #define CMD_VERSION (0x10)  /* FDC version */
  65
  66
  67 /* function prototypes */
  68 extern unsigned int init_floppy ();
  69 extern void reset (void);
  70 extern bool diskchange (void);
  71 extern void motoron (void);
  72 extern void motoroff (void);
  73 extern void recalibrate (void);
  74 extern bool seek (int track);
  75 extern bool log_disk (DrvGeom *g);
  76 extern bool read_block (int block, char *blockbuff, unsigned long nosectors);
  77 extern bool write_block (int block, char *blockbuff, unsigned long nosectors);
  78 extern bool format_track (char track, DrvGeom *g);
  79 extern unsigned int floppy_detect (void);
  80 extern bool floppy_acthandler (unsigned act, partition_t *p, char *block, char *more, int n);
  81
  82 #endif /* FDC_H */