1 /* $NetBSD: xyreg.h,v 1.1 1995/10/30 20:58:22 gwr Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1995 Charles D. Cranor 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * x y r e g . h 36 * 37 * this file contains the description of the Xylogics 450/451's hardware 38 * data structures. 39 * 40 * author: Chuck Cranor <chuck@ccrc.wustl.edu> 41 */ 42 43 #define XYC_MAXDEV 2 /* max devices per controller */ 44 #define XYC_CTLIOPB XYC_MAXDEV /* controller's iopb */ 45 #define XYC_RESETUSEC 1000000 /* max time for xyc reset (same as xdc?) */ 46 #define XYC_MAXIOPB (XYC_MAXDEV+1) 47 /* max number of iopbs that can be active */ 48 #define XYC_MAXTIME 4*1000000 /* four seconds before we give up and reset */ 49 #define XYC_MAXTRIES 4 /* max number of times to retry an operation */ 50 #define XYC_INTERLEAVE 1 /* interleave (from disk label?) */ 51 #define XYFM_BPS 0x200 /* must be 512! */ 52 53 /* 54 * xyc device interface 55 * (lives in VME address space) [note: bytes are swapped!] 56 */ 57 58 struct xyc { 59 volatile u_char xyc_reloc_hi; /* iopb relocation (low byte) */ 60 volatile u_char xyc_reloc_lo; /* iopb relocation (high byte) */ 61 volatile u_char xyc_addr_hi; /* iopb address (low byte) */ 62 volatile u_char xyc_addr_lo; /* iopb address (high byte) */ 63 volatile u_char xyc_rsetup; /* reset/update reg */ 64 volatile u_char xyc_csr; /* control and status register */ 65 }; 66 67 /* 68 * xyc_csr 69 */ 70 71 #define XYC_GBSY 0x80 /* go/busy */ 72 #define XYC_ERR 0x40 /* error */ 73 #define XYC_DERR 0x20 /* double error! */ 74 #define XYC_IPND 0x10 /* interrupt pending */ 75 #define XYC_ADRM 0x08 /* 24-bit addressing */ 76 #define XYC_AREQ 0x04 /* attention request */ 77 #define XYC_AACK 0x02 /* attention ack. */ 78 #define XYC_DRDY 0x01 /* drive ready */ 79 80 /* 81 * Input/Output Parameter Block (iopb) 82 * 83 * all controller commands are done via iopb's. to start a command you 84 * must do this: 85 * [1] allocate space in DVMA space for the iopb 86 * [2] fill out all the fields of the iopb 87 * [3] if the controller isn't busy, start the iopb by loading the address 88 * and reloc in the xyc's registers and setting the "go" bit [done] 89 * [4] controller busy: set AREQ bit, and wait for AACK bit. 90 * add iopb to the chain, and clear AREQ to resume I/O 91 * 92 * when the controller is done with a command it may interrupt (if you 93 * ask it to) and it will set the XYC_IPND bit in the csr. clear 94 * the interrupt by writing one to this bit. 95 * 96 * the format of the iopb is described in section 2.4 of the manual. 97 * note that it is byte-swapped on the sun. 98 */ 99 100 struct xy_iopb { 101 /* section 2.4.2: byte 1 */ 102 volatile u_char resv1:1; /* reserved */ 103 volatile u_char iei:1; /* interrupt on each IOPB done */ 104 volatile u_char ierr:1; /* interrupt on error (no effect on 450) */ 105 volatile u_char hdp:1; /* hold dual port drive */ 106 volatile u_char asr:1; /* autoseek retry */ 107 volatile u_char eef:1; /* enable extended fn. (overlap seek) */ 108 volatile u_char ecm:2; /* ECC correction mode */ 109 #define XY_ECM 2 /* use mode 2 (see section 2.4.2) */ 110 /* section 2.4.1: byte 0 */ 111 volatile u_char aud:1; /* auto-update iopb */ 112 volatile u_char relo:1; /* enable multibus relocation (>16bit addrs)*/ 113 volatile u_char chen:1; /* chain enable, "next iopb" is valid */ 114 volatile u_char ien:1; /* interrupt enable */ 115 volatile u_char com:4; /* command */ 116 #define XYCMD_NOP 0x0 /* no-op */ 117 #define XYCMD_WR 0x1 /* write */ 118 #define XYCMD_RD 0x2 /* read */ 119 #define XYCMD_WTH 0x3 /* write track headers */ 120 #define XYCMD_RTH 0x4 /* read track headers */ 121 #define XYCMD_SK 0x5 /* seek */ 122 #define XYCMD_RST 0x6 /* drive reset */ 123 #define XYCMD_WFM 0x7 /* write format */ 124 #define XYCMD_RDH 0x8 /* read header, data, and ECC */ 125 #define XYCMD_RDS 0x9 /* read drive status */ 126 #define XYCMD_WRH 0xa /* write header, data, and ECC */ 127 #define XYCMD_SDS 0xb /* set drive size */ 128 #define XYCMD_ST 0xc /* self test */ 129 #define XYCMD_R 0xd /* reserved */ 130 #define XYCMD_MBL 0xe /* maint. buffer load */ 131 #define XYCMD_MBD 0xf /* main. buffer dump */ 132 /* section 2.4.4: byte 3 */ 133 volatile u_char errno; /* error or completion code */ 134 /* section 2.4.3: byte 2 */ 135 volatile u_char errs:1; /* error summary bit */ 136 volatile u_char resv2:2; /* reserved */ 137 volatile u_char ctyp:3; /* controller type */ 138 #define XYCT_450 1 /* the 450 controller */ 139 volatile u_char resv3:1; /* reserved */ 140 volatile u_char done:1; /* done! */ 141 /* section 2.4.6: byte 5 */ 142 volatile u_char dt:2; /* drive type */ 143 #define XYC_MAXDT 3 /* largest drive type possible */ 144 volatile u_char resv4:4; /* reserved */ 145 volatile u_char unit:2; /* unit # */ 146 /* section 2.4.5: byte 4 */ 147 volatile u_char bw:1; /* byte(1)/word(0) xfer size */ 148 volatile u_char intlv:4; /* interleave factor (0=1:1, 1=2:1, etc.) */ 149 volatile u_char thro:3; /* dma throttle (0=2,1=4,2=8, etc...) */ 150 #define XY_THRO 4 /* 4 == 32 dma cycles */ 151 /* section 2.4.8: byte 7 */ 152 volatile u_char sect; /* sector # */ 153 /* section 2.4.7: byte 6 */ 154 volatile u_char head; /* head # */ 155 /* section 2.4.9: byte 8,9 */ 156 volatile u_short cyl; /* cyl # */ 157 /* section 2.4.10: byte a,b */ 158 volatile u_short scnt; /* sector count, also drive status */ 159 #define xy_dr_status scnt 160 #define XYS_ONCL 0x80 /* on-cylinder (active LOW) */ 161 #define XYS_DRDY 0x40 /* drive ready (active LOW) */ 162 #define XYS_WRPT 0x20 /* write protect */ 163 #define XYS_DPB 0x10 /* dual-port busy */ 164 #define XYS_SKER 0x08 /* hard seek error */ 165 #define XYS_DFLT 0x04 /* disk fault */ 166 /* section 2.4.11: byte c,d */ 167 volatile u_short dataa; /* data address */ 168 /* section 2.4.12: byte e,f */ 169 volatile u_short datar; /* data relocation pointer */ 170 /* section 2.4.14: byte 11 */ 171 volatile u_char subfn; /* sub-function */ 172 /* section 2.4.13: byte 10 */ 173 volatile u_char hoff; /* head offset for fixed/removeable drives */ 174 /* section 2.4.15: byte 12,13 */ 175 volatile u_short nxtiopb; /* next iopb address (same relocation) */ 176 /* section 2.4.16: byte 14,15 */ 177 volatile u_short eccpat; /* ecc pattern */ 178 /* section 2.4.17: byte 16,17 */ 179 volatile u_short eccaddr; /* ecc address */ 180 }; 181 182 183 /* 184 * errors (section 2.4.4.1) 185 */ 186 187 /* software error codes */ 188 #define XY_ERR_FAIL 0xff /* general total failure */ 189 #define XY_ERR_DERR 0xfe /* double error */ 190 /* no error */ 191 #define XY_ERR_AOK 0x00 /* success */ 192 193 #define XY_ERR_IPEN 0x01 /* interrupt pending */ 194 #define XY_ERR_BCFL 0x03 /* busy conflict */ 195 #define XY_ERR_TIMO 0x04 /* operation timeout */ 196 #define XY_ERR_NHDR 0x05 /* header not found */ 197 #define XY_ERR_HARD 0x06 /* hard ECC error */ 198 #define XY_ERR_ICYL 0x07 /* illegal cylinder address */ 199 #define XY_ERR_ISEC 0x0a /* illegal sector address */ 200 #define XY_ERR_SMAL 0x0d /* last sector too small */ 201 #define XY_ERR_SACK 0x0e /* slave ACK error (non-existent memory) */ 202 #define XY_ERR_CHER 0x12 /* cylinder and head/header error */ 203 #define XY_ERR_SRTR 0x13 /* auto-seek retry successful */ 204 #define XY_ERR_WPRO 0x14 /* write-protect error */ 205 #define XY_ERR_UIMP 0x15 /* unimplemented command */ 206 #define XY_ERR_DNRY 0x16 /* drive not ready */ 207 #define XY_ERR_SZER 0x17 /* sector count zero */ 208 #define XY_ERR_DFLT 0x18 /* drive faulted */ 209 #define XY_ERR_ISSZ 0x19 /* illegal sector size */ 210 #define XY_ERR_SLTA 0x1a /* self test a */ 211 #define XY_ERR_SLTB 0x1b /* self test b */ 212 #define XY_ERR_SLTC 0x1c /* self test c */ 213 #define XY_ERR_SOFT 0x1e /* soft ECC error */ 214 #define XY_ERR_SFOK 0x1f /* soft ECC error recovered */ 215 #define XY_ERR_IHED 0x20 /* illegal head */ 216 #define XY_ERR_DSEQ 0x21 /* disk sequencer error */ 217 #define XY_ERR_SEEK 0x25 /* seek error */ 218 219 220 /* error actions */ 221 #define XY_ERA_PROG 0x10 /* program error: quit */ 222 #define XY_ERA_SOFT 0x30 /* soft error: we recovered */ 223 #define XY_ERA_HARD 0x40 /* hard error: retry */ 224 #define XY_ERA_RSET 0x60 /* hard error: reset, then retry */ 225 #define XY_ERA_WPRO 0x90 /* write protected */ 226 227 228