linux/include/linux/amifdreg.h
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   1#ifndef _LINUX_AMIFDREG_H
   2#define _LINUX_AMIFDREG_H
   3
   4/*
   5** CIAAPRA bits (read only)
   6*/
   7
   8#define DSKRDY      (0x1<<5)        /* disk ready when low */
   9#define DSKTRACK0   (0x1<<4)        /* head at track zero when low */
  10#define DSKPROT     (0x1<<3)        /* disk protected when low */
  11#define DSKCHANGE   (0x1<<2)        /* low when disk removed */
  12
  13/*
  14** CIAAPRB bits (read/write)
  15*/
  16
  17#define DSKMOTOR    (0x1<<7)        /* motor on when low */
  18#define DSKSEL3     (0x1<<6)        /* select drive 3 when low */
  19#define DSKSEL2     (0x1<<5)        /* select drive 2 when low */
  20#define DSKSEL1     (0x1<<4)        /* select drive 1 when low */
  21#define DSKSEL0     (0x1<<3)        /* select drive 0 when low */
  22#define DSKSIDE     (0x1<<2)        /* side selection: 0 = upper, 1 = lower */
  23#define DSKDIREC    (0x1<<1)        /* step direction: 0=in, 1=out (to trk 0) */
  24#define DSKSTEP     (0x1)           /* pulse low to step head 1 track */
  25
  26/*
  27** DSKBYTR bits (read only)
  28*/
  29
  30#define DSKBYT      (1<<15)         /* register contains valid byte when set */
  31#define DMAON       (1<<14)         /* disk DMA enabled */
  32#define DISKWRITE   (1<<13)         /* disk write bit in DSKLEN enabled */
  33#define WORDEQUAL   (1<<12)         /* DSKSYNC register match when true */
  34/* bits 7-0 are data */
  35
  36/*
  37** ADKCON/ADKCONR bits
  38*/
  39
  40#ifndef SETCLR
  41#define ADK_SETCLR      (1<<15)     /* control bit */
  42#endif
  43#define ADK_PRECOMP1    (1<<14)     /* precompensation selection */
  44#define ADK_PRECOMP0    (1<<13)     /* 00=none, 01=140ns, 10=280ns, 11=500ns */
  45#define ADK_MFMPREC     (1<<12)     /* 0=GCR precomp., 1=MFM precomp. */
  46#define ADK_WORDSYNC    (1<<10)     /* enable DSKSYNC auto DMA */
  47#define ADK_MSBSYNC     (1<<9)      /* when 1, enable sync on MSbit (for GCR) */
  48#define ADK_FAST        (1<<8)      /* bit cell: 0=2us (GCR), 1=1us (MFM) */
  49 
  50/*
  51** DSKLEN bits
  52*/
  53
  54#define DSKLEN_DMAEN    (1<<15)
  55#define DSKLEN_WRITE    (1<<14)
  56
  57/*
  58** INTENA/INTREQ bits
  59*/
  60
  61#define DSKINDEX    (0x1<<4)        /* DSKINDEX bit */
  62
  63/*
  64** Misc
  65*/
  66 
  67#define MFM_SYNC    0x4489          /* standard MFM sync value */
  68
  69/* Values for FD_COMMAND */
  70#define FD_RECALIBRATE          0x07    /* move to track 0 */
  71#define FD_SEEK                 0x0F    /* seek track */
  72#define FD_READ                 0xE6    /* read with MT, MFM, SKip deleted */
  73#define FD_WRITE                0xC5    /* write with MT, MFM */
  74#define FD_SENSEI               0x08    /* Sense Interrupt Status */
  75#define FD_SPECIFY              0x03    /* specify HUT etc */
  76#define FD_FORMAT               0x4D    /* format one track */
  77#define FD_VERSION              0x10    /* get version code */
  78#define FD_CONFIGURE            0x13    /* configure FIFO operation */
  79#define FD_PERPENDICULAR        0x12    /* perpendicular r/w mode */
  80
  81#endif /* _LINUX_AMIFDREG_H */
  82
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