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