1 /* $NetBSD: fdreg.h,v 1.6 2012/10/14 18:38:32 tsutsui 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