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