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fdreg.h revision 1.5.2.1 
      1 /*	$NetBSD: fdreg.h,v 1.5.2.1 2012/11/20 03:01:48 tls Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1991 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)fdreg.h	7.1 (Berkeley) 5/9/91
     32  */
     33 
     34 /*
     35  * x680x0 floppy controller registers and bitfields
     36  */
     37 
     38 /* uses NEC72065 controller */
     39 #include <dev/ic/nec765reg.h>
     40 
     41 /* registers */
     42 #define	fdsts	0	/* NEC 765 Main Status Register (R) */
     43 #define	fddata	1	/* NEC 765 Data Register (R/W) */
     44 #define fdout	2	/* Digital Output Register (W) */
     45 #define	fdctl	3	/* Control Register (W) */
     46 #define	FDC_500KBPS	0x00	/* 500KBPS MFM drive transfer rate */
     47 #define	FDC_300KBPS	0x01	/* 300KBPS MFM drive transfer rate */
     48 #define	FDC_250KBPS	0x02	/* 250KBPS MFM drive transfer rate */
     49 #define	FDC_125KBPS	0x03	/* 125KBPS FM drive transfer rate */
     50 
     51 #define	FDC_BSIZE	512
     52 #define	FDC_MAXIOSIZE	MAXBSIZE
     53 
     54 /* Floppy disk controller command bytes. */
     55 #define NE7CMD_RESET       0x36	/* reset command for fdc */
     56 
     57 /* default attach args */
     58 #define FDC_ADDR 0xe94000	/* builtin fdc is here */
     59 #define FDC_MAPSIZE 0x2000	/* builtin fdc I/O range */
     60 #define FDC_INTR 96		/* interrupt vector */
     61 #define FDC_DMA 0		/* DMA ch# */
     62 #define FDC_DMAINTR 100		/* DMA interrupt vector */
     63 
     64 /*
     65  * fdformat parameters
     66  */
     67 
     68 #define FD_MAX_NSEC	18	/* highest known number of spt */
     69 
     70 struct ne7_fd_formb {
     71 	int cyl, head;
     72 	int transfer_rate;	/* fdreg.h: FDC_???KBPS */
     73 
     74 	union {
     75 		struct fd_form_data {
     76 			/*
     77 			 * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
     78 			 * it is hardware-dependent since it exactly
     79 			 * matches the byte sequence to write to FDC
     80 			 * during its `format track' operation
     81 			 */
     82 			uint8_t secshift; /* 0 -> 128, ...; usually 2 -> 512 */
     83 			uint8_t nsecs;    /* must be <= FD_MAX_NSEC */
     84 			uint8_t gaplen;   /* GAP 3 length; usually 84 */
     85 			uint8_t fillbyte; /* usually 0xf6 */
     86 			struct fd_idfield_data {
     87 				/*
     88 				 * data to write into id fields;
     89 				 * for obscure formats, they mustn't match
     90 				 * the real values (but mostly do)
     91 				 */
     92 				uint8_t cylno;		/* 0 thru 79 (or 39) */
     93 				uint8_t headno;		/* 0, or 1 */
     94 				uint8_t secno;		/* starting at 1! */
     95 				uint8_t secsize;	/* usually 2 */
     96 			} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
     97 		} structured;
     98 		uint8_t raw[1];	/* to have continuous indexed access */
     99 	} format_info;
    100 };
    101 
    102 /* make life easier */
    103 # define fd_formb_secshift   format_info.structured.secshift
    104 # define fd_formb_nsecs      format_info.structured.nsecs
    105 # define fd_formb_gaplen     format_info.structured.gaplen
    106 # define fd_formb_fillbyte   format_info.structured.fillbyte
    107 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
    108 # define fd_formb_cylno(i)   format_info.structured.idfields[i].cylno
    109 # define fd_formb_headno(i)  format_info.structured.idfields[i].headno
    110 # define fd_formb_secno(i)   format_info.structured.idfields[i].secno
    111 # define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
    112