1 /* 2 * $NetBSD: fdvar.h,v 1.6 1997/10/19 22:29:23 pk Exp $ 3 * 4 * Copyright (c) 1995 Paul Kranenburg 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Paul Kranenburg. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 */ 33 34 #define FD_BSIZE(fd) (128 * (1 << fd->sc_type->secsize)) 35 #define FDC_MAXIOSIZE NBPG /* XXX should be MAXBSIZE */ 36 37 #define FDC_NSTATUS 10 38 39 #ifndef _LOCORE 40 struct fdcio { 41 /* 42 * 82072 (sun4c) and 82077 (sun4m) controllers have different 43 * register layout; so we cache some here. 44 */ 45 volatile u_int8_t *fdcio_reg_msr; 46 volatile u_int8_t *fdcio_reg_fifo; 47 volatile u_int8_t *fdcio_reg_dor; /* 82077 only */ 48 49 /* 50 * Interrupt state. 51 */ 52 int fdcio_istate; 53 54 /* 55 * IO state. 56 */ 57 char *fdcio_data; /* pseudo-dma data */ 58 int fdcio_tc; /* pseudo-dma Terminal Count */ 59 u_char fdcio_status[FDC_NSTATUS]; /* copy of registers */ 60 int fdcio_nstat; /* # of valid status bytes */ 61 62 /* 63 * Statictics. 64 */ 65 struct evcnt fdcio_intrcnt; 66 }; 67 #endif /* _LOCORE */ 68 69 /* istate values */ 70 #define ISTATE_IDLE 0 /* No HW interrupt expected */ 71 #define ISTATE_SPURIOUS 1 /* Spurious HW interrupt detected */ 72 #define ISTATE_SENSEI 2 /* Do SENSEI on next HW interrupt */ 73 #define ISTATE_DMA 3 /* Pseudo-DMA in progress */ 74 #define ISTATE_DONE 4 /* Interrupt processing complete */ 75 76 77 #define FD_MAX_NSEC 36 /* highest known number of spt - allow for */ 78 /* 2.88 MB drives */ 79 80 #ifndef _LOCORE 81 struct ne7_fd_formb { 82 int cyl, head; 83 int transfer_rate; /* fdreg.h: FDC_???KBPS */ 84 85 union { 86 struct fd_form_data { 87 /* 88 * DO NOT CHANGE THE LAYOUT OF THIS STRUCTS 89 * it is hardware-dependant since it exactly 90 * matches the byte sequence to write to FDC 91 * during its `format track' operation 92 */ 93 u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */ 94 u_char nsecs; /* must be <= FD_MAX_NSEC */ 95 u_char gaplen; /* GAP 3 length; usually 84 */ 96 u_char fillbyte; /* usually 0xf6 */ 97 struct fd_idfield_data { 98 /* 99 * data to write into id fields; 100 * for obscure formats, they mustn't match 101 * the real values (but mostly do) 102 */ 103 u_char cylno; /* 0 thru 79 (or 39) */ 104 u_char headno; /* 0, or 1 */ 105 u_char secno; /* starting at 1! */ 106 u_char secsize; /* usually 2 */ 107 } idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */ 108 } structured; 109 u_char raw[1]; /* to have continuous indexed access */ 110 } format_info; 111 }; 112 113 /* make life easier */ 114 #define fd_formb_secshift format_info.structured.secshift 115 #define fd_formb_nsecs format_info.structured.nsecs 116 #define fd_formb_gaplen format_info.structured.gaplen 117 #define fd_formb_fillbyte format_info.structured.fillbyte 118 /* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */ 119 #define fd_formb_cylno(i) format_info.structured.idfields[i].cylno 120 #define fd_formb_headno(i) format_info.structured.idfields[i].headno 121 #define fd_formb_secno(i) format_info.structured.idfields[i].secno 122 #define fd_formb_secsize(i) format_info.structured.idfields[i].secsize 123 #endif /* _LOCORE */ 124