NetBSD/sys/dev/ic/wdcreg.h

74 lines
3.3 KiB
C

/* $NetBSD: wdcreg.h,v 1.33 2004/05/25 20:42:41 thorpej Exp $ */
/*-
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)wdreg.h 7.1 (Berkeley) 5/9/91
*/
#ifndef _DEV_IC_WDCREG_H_
#define _DEV_IC_WDCREG_H_
/*
* WD1003 / ATA Disk Controller register definitions.
*/
/* offsets of registers in the 'regular' register region */
#define wd_data 0 /* data register (R/W - 16 bits) */
#define wd_error 1 /* error register (R) */
#define wd_precomp 1 /* write precompensation (W) */
#define wd_seccnt 2 /* sector count (R/W) */
#define wd_ireason 2 /* interrupt reason (R/W) (for atapi) */
#define wd_sector 3 /* first sector number (R/W) */
#define wd_cyl_lo 4 /* cylinder address, low byte (R/W) */
#define wd_cyl_hi 5 /* cylinder address, high byte (R/W) */
#define wd_sdh 6 /* sector size/drive/head (R/W) */
#define wd_command 7 /* command register (W) */
#define wd_lba_lo 3 /* lba address, low byte (RW) */
#define wd_lba_mi 4 /* lba address, middle byte (RW) */
#define wd_lba_hi 5 /* lba address, high byte (RW) */
/* "shadow" registers; these may or may not overlap regular registers */
#define wd_status 8 /* immediate status (R) */
#define wd_features 9 /* features (W) */
/* offsets of registers in the auxiliary register region */
#define wd_aux_altsts 0 /* alternate fixed disk status (R) */
#define wd_aux_ctlr 0 /* fixed disk controller control (W) */
#define WDCTL_4BIT 0x08 /* use four head bits (wd1003) */
#define WDCTL_RST 0x04 /* reset the controller */
#define WDCTL_IDS 0x02 /* disable controller interrupts */
#if 0 /* NOT MAPPED; fd uses this register on PCs */
#define wd_digin 1 /* disk controller input (R) */
#endif
#endif /* _DEV_IC_WDCREG_H_ */