1/* $NetBSD: wdcreg.h,v 1.35 2012/01/15 20:08:54 jakllsch 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