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      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