sys/dev/ic/wdcreg.h

   1 /*      $NetBSD: wdcreg.h,v 1.27.2.3 2004/09/21 13:28:09 skrll 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_4BIT              0x08   /* use four head bits (wd1003) */
  67 #define  WDCTL_RST               0x04   /* reset the controller */
  68 #define  WDCTL_IDS               0x02   /* disable controller interrupts */
  69 #if 0 /* NOT MAPPED; fd uses this register on PCs */
  70 #define wd_digin                1       /* disk controller input (R) */
  71 #endif
  72
  73 #endif /* _DEV_IC_WDCREG_H_ */