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