1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * from: @(#)nec765.h 7.1 (Berkeley) 5/9/91 30 * $FreeBSD: src/sys/isa/ic/nec765.h,v 1.8 1999/08/28 00:46:04 peter Exp $ 31 * $DragonFly: src/sys/dev/disk/fd/nec765.h,v 1.2 2003/06/17 04:28:40 dillon Exp $ 32 */ 33 34 /* 35 * Nec 765 floppy disc controller definitions 36 */ 37 38 /* Main status register */ 39 #define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */ 40 #define NE7_DBB 0x02 /* Diskette drive B is seeking, thus busy */ 41 #define NE7_CB 0x10 /* Diskette Controller Busy */ 42 #define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */ 43 #define NE7_DIO 0x40 /* Diskette Controller Data register I/O */ 44 #define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */ 45 46 /* Status register ST0 */ 47 #define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005equ_chck\004drive_notrdy\003top_head" 48 49 #define NE7_ST0_IC 0xc0 /* interrupt completion code */ 50 51 #define NE7_ST0_IC_RC 0xc0 /* terminated due to ready changed, n/a */ 52 #define NE7_ST0_IC_IV 0x80 /* invalid command; must reset FDC */ 53 #define NE7_ST0_IC_AT 0x40 /* abnormal termination, check error stat */ 54 #define NE7_ST0_IC_NT 0x00 /* normal termination */ 55 56 #define NE7_ST0_SE 0x20 /* seek end */ 57 #define NE7_ST0_EC 0x10 /* equipment check, recalibrated but no trk0 */ 58 #define NE7_ST0_NR 0x08 /* not ready (n/a) */ 59 #define NE7_ST0_HD 0x04 /* upper head selected */ 60 #define NE7_ST0_DR 0x03 /* drive code */ 61 62 /* Status register ST1 */ 63 #define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am" 64 65 #define NE7_ST1_EN 0x80 /* end of cylinder, access past last record */ 66 #define NE7_ST1_DE 0x20 /* data error, CRC fail in ID or data */ 67 #define NE7_ST1_OR 0x10 /* DMA overrun, DMA failed to do i/o quickly */ 68 #define NE7_ST1_ND 0x04 /* no data, sector not found or CRC in ID f. */ 69 #define NE7_ST1_NW 0x02 /* not writeable, attempt to violate WP */ 70 #define NE7_ST1_MA 0x01 /* missing address mark (in ID or data field)*/ 71 72 /* Status register ST2 */ 73 #define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam" 74 75 #define NE7_ST2_CM 0x40 /* control mark; found deleted data */ 76 #define NE7_ST2_DD 0x20 /* data error in data field, CRC fail */ 77 #define NE7_ST2_WC 0x10 /* wrong cylinder, ID field mismatches cmd */ 78 #define NE7_ST2_SH 0x08 /* scan equal hit */ 79 #define NE7_ST2_SN 0x04 /* scan not satisfied */ 80 #define NE7_ST2_BC 0x02 /* bad cylinder, cylinder marked 0xff */ 81 #define NE7_ST2_MD 0x01 /* missing address mark in data field */ 82 83 /* Status register ST3 */ 84 #define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002" 85 86 #define NE7_ST3_FT 0x80 /* fault; PC: n/a */ 87 #define NE7_ST3_WP 0x40 /* write protected */ 88 #define NE7_ST3_RD 0x20 /* ready; PC: always true */ 89 #define NE7_ST3_T0 0x10 /* track 0 */ 90 #define NE7_ST3_TS 0x08 /* two-sided; PC: n/a */ 91 #define NE7_ST3_HD 0x04 /* upper head select */ 92 #define NE7_ST3_US 0x03 /* unit select */ 93 94 /* Commands */ 95 /* 96 * the top three bits -- where appropriate -- are set as follows: 97 * 98 * 0x80 - MT multi-track; allow both sides to be handled in single cmd 99 * 0x40 - MFM modified frequency modulation; use MFM encoding 100 * 0x20 - SK skip; skip sectors marked as "deleted" 101 */ 102 #define NE7CMD_READTRK 0x42 /* read whole track */ 103 #define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit 104 parameters byte */ 105 #define NE7CMD_SENSED 4 /* sense drive - requires unit select byte */ 106 #define NE7CMD_WRITE 0xc5 /* write - requires eight additional bytes */ 107 #define NE7CMD_READ 0xe6 /* read - requires eight additional bytes */ 108 #define NE7CMD_RECAL 7 /* recalibrate drive - requires 109 unit select byte */ 110 #define NE7CMD_SENSEI 8 /* sense controller interrupt status */ 111 #define NE7CMD_WRITEDEL 0xc9 /* write deleted data */ 112 #define NE7CMD_READID 0x4a /* read ID field */ 113 #define NE7CMD_READDEL 0xec /* read deleted data */ 114 #define NE7CMD_FORMAT 0x4d /* format - requires five additional bytes */ 115 #define NE7CMD_SEEK 0x0f /* seek drive - requires unit select byte 116 and new cyl byte */ 117 #define NE7CMD_SCNEQU 0xf1 /* scan equal */ 118 #define NE7CMD_SCNLE 0xf9 /* scan less or equal */ 119 #define NE7CMD_SCNGE 0xfd /* scan greater or equal */ 120 121 /* 122 * Enhanced controller commands: 123 */ 124 #define NE7CMD_VERSION 0x10 /* version (ok for all controllers) */ 125 126 #define I8207X_CONFIGURE 0x13 /* configure enhanced features */ 127 128 /* 129 * "specify" definitions 130 * 131 * acronyms (times are relative to a FDC clock of 8 MHz): 132 * srt - step rate; PC usually 3 ms 133 * hut - head unload time; PC usually maximum of 240 ms 134 * hlt - head load time; PC usually minimum of 2 ms 135 * nd - no DMA flag; PC usually not set (0) 136 */ 137 138 #define NE7_SPEC_1(srt, hut) (((16 - (srt)) << 4) | (((hut) / 16))) 139 #define NE7_SPEC_2(hlt, nd) (((hlt) & 0xFE) | ((nd) & 1)) 140