| 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_ */ |