1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_AMIFDREG_H 3 #define _LINUX_AMIFDREG_H 4 5 /* 6 ** CIAAPRA bits (read only) 7 */ 8 9 #define DSKRDY (0x1<<5) /* disk ready when low */ 10 #define DSKTRACK0 (0x1<<4) /* head at track zero when low */ 11 #define DSKPROT (0x1<<3) /* disk protected when low */ 12 #define DSKCHANGE (0x1<<2) /* low when disk removed */ 13 14 /* 15 ** CIAAPRB bits (read/write) 16 */ 17 18 #define DSKMOTOR (0x1<<7) /* motor on when low */ 19 #define DSKSEL3 (0x1<<6) /* select drive 3 when low */ 20 #define DSKSEL2 (0x1<<5) /* select drive 2 when low */ 21 #define DSKSEL1 (0x1<<4) /* select drive 1 when low */ 22 #define DSKSEL0 (0x1<<3) /* select drive 0 when low */ 23 #define DSKSIDE (0x1<<2) /* side selection: 0 = upper, 1 = lower */ 24 #define DSKDIREC (0x1<<1) /* step direction: 0=in, 1=out (to trk 0) */ 25 #define DSKSTEP (0x1) /* pulse low to step head 1 track */ 26 27 /* 28 ** DSKBYTR bits (read only) 29 */ 30 31 #define DSKBYT (1<<15) /* register contains valid byte when set */ 32 #define DMAON (1<<14) /* disk DMA enabled */ 33 #define DISKWRITE (1<<13) /* disk write bit in DSKLEN enabled */ 34 #define WORDEQUAL (1<<12) /* DSKSYNC register match when true */ 35 /* bits 7-0 are data */ 36 37 /* 38 ** ADKCON/ADKCONR bits 39 */ 40 41 #ifndef SETCLR 42 #define ADK_SETCLR (1<<15) /* control bit */ 43 #endif 44 #define ADK_PRECOMP1 (1<<14) /* precompensation selection */ 45 #define ADK_PRECOMP0 (1<<13) /* 00=none, 01=140ns, 10=280ns, 11=500ns */ 46 #define ADK_MFMPREC (1<<12) /* 0=GCR precomp., 1=MFM precomp. */ 47 #define ADK_WORDSYNC (1<<10) /* enable DSKSYNC auto DMA */ 48 #define ADK_MSBSYNC (1<<9) /* when 1, enable sync on MSbit (for GCR) */ 49 #define ADK_FAST (1<<8) /* bit cell: 0=2us (GCR), 1=1us (MFM) */ 50 51 /* 52 ** DSKLEN bits 53 */ 54 55 #define DSKLEN_DMAEN (1<<15) 56 #define DSKLEN_WRITE (1<<14) 57 58 /* 59 ** INTENA/INTREQ bits 60 */ 61 62 #define DSKINDEX (0x1<<4) /* DSKINDEX bit */ 63 64 /* 65 ** Misc 66 */ 67 68 #define MFM_SYNC 0x4489 /* standard MFM sync value */ 69 70 /* Values for FD_COMMAND */ 71 #define FD_RECALIBRATE 0x07 /* move to track 0 */ 72 #define FD_SEEK 0x0F /* seek track */ 73 #define FD_READ 0xE6 /* read with MT, MFM, SKip deleted */ 74 #define FD_WRITE 0xC5 /* write with MT, MFM */ 75 #define FD_SENSEI 0x08 /* Sense Interrupt Status */ 76 #define FD_SPECIFY 0x03 /* specify HUT etc */ 77 #define FD_FORMAT 0x4D /* format one track */ 78 #define FD_VERSION 0x10 /* get version code */ 79 #define FD_CONFIGURE 0x13 /* configure FIFO operation */ 80 #define FD_PERPENDICULAR 0x12 /* perpendicular r/w mode */ 81 82 #endif /* _LINUX_AMIFDREG_H */ 83