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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