1/* $NetBSD: wdcreg.h,v 1.34 2005/12/11 12:21:29 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)wdreg.h 7.1 (Berkeley) 5/9/91 35 */ 36 37#ifndef _DEV_IC_WDCREG_H_ 38#define _DEV_IC_WDCREG_H_ 39 40/* 41 * WD1003 / ATA Disk Controller register definitions. 42 */ 43 44/* offsets of registers in the 'regular' register region */ 45#define wd_data 0 /* data register (R/W - 16 bits) */ 46#define wd_error 1 /* error register (R) */ 47#define wd_precomp 1 /* write precompensation (W) */ 48#define wd_seccnt 2 /* sector count (R/W) */ 49#define wd_ireason 2 /* interrupt reason (R/W) (for atapi) */ 50#define wd_sector 3 /* first sector number (R/W) */ 51#define wd_cyl_lo 4 /* cylinder address, low byte (R/W) */ 52#define wd_cyl_hi 5 /* cylinder address, high byte (R/W) */ 53#define wd_sdh 6 /* sector size/drive/head (R/W) */ 54#define wd_command 7 /* command register (W) */ 55#define wd_lba_lo 3 /* lba address, low byte (RW) */ 56#define wd_lba_mi 4 /* lba address, middle byte (RW) */ 57#define wd_lba_hi 5 /* lba address, high byte (RW) */ 58 59/* "shadow" registers; these may or may not overlap regular registers */ 60#define wd_status 8 /* immediate status (R) */ 61#define wd_features 9 /* features (W) */ 62 63/* offsets of registers in the auxiliary register region */ 64#define wd_aux_altsts 0 /* alternate fixed disk status (R) */ 65#define wd_aux_ctlr 0 /* fixed disk controller control (W) */ 66#define WDCTL_HOB 0x80 /* read high order byte */ 67#define WDCTL_4BIT 0x08 /* use four head bits (wd1003) */ 68#define WDCTL_RST 0x04 /* reset the controller */ 69#define WDCTL_IDS 0x02 /* disable controller interrupts */ 70#if 0 /* NOT MAPPED; fd uses this register on PCs */ 71#define wd_digin 1 /* disk controller input (R) */ 72#endif 73 74#endif /* _DEV_IC_WDCREG_H_ */ 75