14Srgrimes/*- 24Srgrimes * Copyright (c) 1991 The Regents of the University of California. 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * Redistribution and use in source and binary forms, with or without 64Srgrimes * modification, are permitted provided that the following conditions 74Srgrimes * are met: 84Srgrimes * 1. Redistributions of source code must retain the above copyright 94Srgrimes * notice, this list of conditions and the following disclaimer. 104Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 114Srgrimes * notice, this list of conditions and the following disclaimer in the 124Srgrimes * documentation and/or other materials provided with the distribution. 134Srgrimes * 4. Neither the name of the University nor the names of its contributors 144Srgrimes * may be used to endorse or promote products derived from this software 154Srgrimes * without specific prior written permission. 164Srgrimes * 174Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 184Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 194Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 204Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 214Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 224Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 234Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 244Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 254Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 264Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 274Srgrimes * SUCH DAMAGE. 284Srgrimes * 29619Srgrimes * from: @(#)nec765.h 7.1 (Berkeley) 5/9/91 3050477Speter * $FreeBSD$ 314Srgrimes */ 324Srgrimes 334Srgrimes/* 344Srgrimes * Nec 765 floppy disc controller definitions 354Srgrimes */ 364Srgrimes 374Srgrimes/* Main status register */ 38162165Sjkim#define NE7_DAB 0x01 /* Diskette drive A is seeking, thus busy */ 39162165Sjkim#define NE7_DBB 0x02 /* Diskette drive B is seeking, thus busy */ 40162165Sjkim#define NE7_CB 0x10 /* Diskette Controller Busy */ 41162165Sjkim#define NE7_NDM 0x20 /* Diskette Controller in Non Dma Mode */ 42162165Sjkim#define NE7_DIO 0x40 /* Diskette Controller Data register I/O */ 43162165Sjkim#define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */ 444Srgrimes 454Srgrimes/* Status register ST0 */ 462838Sdg#define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005equ_chck\004drive_notrdy\003top_head" 474Srgrimes 482838Sdg#define NE7_ST0_IC 0xc0 /* interrupt completion code */ 492838Sdg 502838Sdg#define NE7_ST0_IC_RC 0xc0 /* terminated due to ready changed, n/a */ 512838Sdg#define NE7_ST0_IC_IV 0x80 /* invalid command; must reset FDC */ 522838Sdg#define NE7_ST0_IC_AT 0x40 /* abnormal termination, check error stat */ 532838Sdg#define NE7_ST0_IC_NT 0x00 /* normal termination */ 542838Sdg 552838Sdg#define NE7_ST0_SE 0x20 /* seek end */ 562838Sdg#define NE7_ST0_EC 0x10 /* equipment check, recalibrated but no trk0 */ 572838Sdg#define NE7_ST0_NR 0x08 /* not ready (n/a) */ 582838Sdg#define NE7_ST0_HD 0x04 /* upper head selected */ 592838Sdg#define NE7_ST0_DR 0x03 /* drive code */ 602838Sdg 614Srgrimes/* Status register ST1 */ 624Srgrimes#define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am" 634Srgrimes 642838Sdg#define NE7_ST1_EN 0x80 /* end of cylinder, access past last record */ 652838Sdg#define NE7_ST1_DE 0x20 /* data error, CRC fail in ID or data */ 662838Sdg#define NE7_ST1_OR 0x10 /* DMA overrun, DMA failed to do i/o quickly */ 672838Sdg#define NE7_ST1_ND 0x04 /* no data, sector not found or CRC in ID f. */ 682838Sdg#define NE7_ST1_NW 0x02 /* not writeable, attempt to violate WP */ 692838Sdg#define NE7_ST1_MA 0x01 /* missing address mark (in ID or data field)*/ 702838Sdg 714Srgrimes/* Status register ST2 */ 724Srgrimes#define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam" 734Srgrimes 742838Sdg#define NE7_ST2_CM 0x40 /* control mark; found deleted data */ 752838Sdg#define NE7_ST2_DD 0x20 /* data error in data field, CRC fail */ 762838Sdg#define NE7_ST2_WC 0x10 /* wrong cylinder, ID field mismatches cmd */ 772838Sdg#define NE7_ST2_SH 0x08 /* scan equal hit */ 782838Sdg#define NE7_ST2_SN 0x04 /* scan not satisfied */ 792838Sdg#define NE7_ST2_BC 0x02 /* bad cylinder, cylinder marked 0xff */ 802838Sdg#define NE7_ST2_MD 0x01 /* missing address mark in data field */ 812838Sdg 824Srgrimes/* Status register ST3 */ 834Srgrimes#define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002" 844Srgrimes 852838Sdg#define NE7_ST3_FT 0x80 /* fault; PC: n/a */ 862838Sdg#define NE7_ST3_WP 0x40 /* write protected */ 872838Sdg#define NE7_ST3_RD 0x20 /* ready; PC: always true */ 882838Sdg#define NE7_ST3_T0 0x10 /* track 0 */ 892838Sdg#define NE7_ST3_TS 0x08 /* two-sided; PC: n/a */ 902838Sdg#define NE7_ST3_HD 0x04 /* upper head select */ 912838Sdg#define NE7_ST3_US 0x03 /* unit select */ 922838Sdg 93160137Sjkim/* Data Rate Select Register DSR (enhanced controller) */ 94160137Sjkim#define I8207X_DSR_SR 0x80 /* software reset */ 95160137Sjkim#define I8207X_DSR_LP 0x40 /* low power */ 96160137Sjkim#define I8207X_DSR_PS 0x1c /* precompensation select */ 97160137Sjkim#define I8207X_DSR_RS 0x03 /* data rate select */ 98160137Sjkim 994Srgrimes/* Commands */ 1002838Sdg/* 1012838Sdg * the top three bits -- where appropriate -- are set as follows: 1022838Sdg * 10388010Sjoerg * MT - multi-track; allow both sides to be handled in single cmd 10488010Sjoerg * MFM - modified frequency modulation; use MFM encoding 10588010Sjoerg * SK - skip; skip sectors marked as "deleted" 1062838Sdg */ 10788010Sjoerg 10888010Sjoerg#define NE7CMD_MT 0x80 /* READ, WRITE, WRITEDEL, READDEL, SCAN* */ 10988010Sjoerg#define NE7CMD_MFM 0x40 /* same as MT, plus READTRK, READID, FORMAT */ 11088010Sjoerg#define NE7CMD_SK 0x20 /* READ, READDEL, SCAN* */ 11188010Sjoerg 112162165Sjkim#define NE7CMD_READTRK 0x02 /* read whole track */ 113162165Sjkim#define NE7CMD_SPECIFY 0x03 /* specify drive parameters - requires unit 11488010Sjoerg * parameters byte */ 115162165Sjkim#define NE7CMD_SENSED 0x04 /* sense drive - requires unit select byte */ 116162165Sjkim#define NE7CMD_WRITE 0x05 /* write - requires eight additional bytes */ 117162165Sjkim#define NE7CMD_READ 0x06 /* read - requires eight additional bytes */ 118162165Sjkim#define NE7CMD_RECAL 0x07 /* recalibrate drive - requires 11988010Sjoerg * unit select byte */ 120162165Sjkim#define NE7CMD_SENSEI 0x08 /* sense controller interrupt status */ 121162165Sjkim#define NE7CMD_WRITEDEL 0x09 /* write deleted data */ 122162165Sjkim#define NE7CMD_READID 0x0a /* read ID field */ 123162165Sjkim#define NE7CMD_READDEL 0x0c /* read deleted data */ 124162165Sjkim#define NE7CMD_FORMAT 0x0d /* format - requires five additional bytes */ 125162165Sjkim#define NE7CMD_SEEK 0x0f /* seek drive - requires unit select byte 12688010Sjoerg * and new cyl byte */ 127162165Sjkim#define NE7CMD_VERSION 0x10 /* get version */ 12888010Sjoerg#define NE7CMD_SCNEQU 0x11 /* scan equal */ 12988010Sjoerg#define NE7CMD_SCNLE 0x19 /* scan less or equal */ 13088010Sjoerg#define NE7CMD_SCNGE 0x1d /* scan greater or equal */ 1312838Sdg 1325417Sjoerg/* 1335417Sjoerg * Enhanced controller commands: 1345417Sjoerg */ 135162165Sjkim#define I8207X_DUMPREG 0x0e /* dump internal registers */ 136162165Sjkim#define I8207X_CONFIG 0x13 /* configure enhanced features */ 1372838Sdg 1382838Sdg/* 1392838Sdg * "specify" definitions 1402838Sdg * 1412838Sdg * acronyms (times are relative to a FDC clock of 8 MHz): 1422838Sdg * srt - step rate; PC usually 3 ms 1432838Sdg * hut - head unload time; PC usually maximum of 240 ms 1442838Sdg * hlt - head load time; PC usually minimum of 2 ms 1452838Sdg * nd - no DMA flag; PC usually not set (0) 1462838Sdg */ 1472838Sdg 148162165Sjkim#define NE7_SPEC_1(srt, hut) (((16 - (srt)) << 4) | (((hut) / 16))) 149162165Sjkim#define NE7_SPEC_2(hlt, nd) (((hlt) & 0xFE) | ((nd) & 1)) 150