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/* $OpenBSD: wdcreg.h,v 1.1 1999/07/18 21:25:16 csapuntz Exp $ */
/* $NetBSD: wdcreg.h,v 1.22 1999/03/07 14:02:54 bouyer 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
*/
/*
* 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_features 1 /* features (W), same as wd_precomp */
#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_status 7 /* immediate status (R) */
/* 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
/*
* Status bits.
*/
#define WDCS_BSY 0x80 /* busy */
#define WDCS_DRDY 0x40 /* drive ready */
#define WDCS_DWF 0x20 /* drive write fault */
#define WDCS_DSC 0x10 /* drive seek complete */
#define WDCS_DRQ 0x08 /* data request */
#define WDCS_CORR 0x04 /* corrected data */
#define WDCS_IDX 0x02 /* index */
#define WDCS_ERR 0x01 /* error */
#define WDCS_BITS "\020\010bsy\007drdy\006dwf\005dsc\004drq\003corr\002idx\001err"
/*
* Error bits.
*/
#define WDCE_BBK 0x80 /* bad block detected */
#define WDCE_CRC 0x80 /* CRC error (Ultra-DMA only) */
#define WDCE_UNC 0x40 /* uncorrectable data error */
#define WDCE_MC 0x20 /* media changed */
#define WDCE_IDNF 0x10 /* id not found */
#define WDCE_MCR 0x08 /* media change requested */
#define WDCE_ABRT 0x04 /* aborted command */
#define WDCE_TK0NF 0x02 /* track 0 not found */
#define WDCE_AMNF 0x01 /* address mark not found */
/*
* Commands for Disk Controller.
*/
#define WDCC_NOP 0x00 /* NOP - Always fail with "aborted command" */
#define WDCC_RECAL 0x10 /* disk restore code -- resets cntlr */
#define WDCC_READ 0x20 /* disk read code */
#define WDCC_WRITE 0x30 /* disk write code */
#define WDCC__LONG 0x02 /* modifier -- access ecc bytes */
#define WDCC__NORETRY 0x01 /* modifier -- no retrys */
#define WDCC_FORMAT 0x50 /* disk format code */
#define WDCC_DIAGNOSE 0x90 /* controller diagnostic */
#define WDCC_IDP 0x91 /* initialize drive parameters */
#define WDCC_READMULTI 0xc4 /* read multiple */
#define WDCC_WRITEMULTI 0xc5 /* write multiple */
#define WDCC_SETMULTI 0xc6 /* set multiple mode */
#define WDCC_READDMA 0xc8 /* read with DMA */
#define WDCC_WRITEDMA 0xca /* write with DMA */
#define WDCC_ACKMC 0xdb /* acknowledge media change */
#define WDCC_LOCK 0xde /* lock drawer */
#define WDCC_UNLOCK 0xdf /* unlock drawer */
#define WDCC_FLUSHCACHE 0xe7 /* Flush cache */
#define WDCC_IDENTIFY 0xec /* read parameters from controller */
#define SET_FEATURES 0xef /* set features */
#define WDCC_IDLE 0xe3 /* set idle timer & enter idle mode */
#define WDCC_IDLE_IMMED 0xe1 /* enter idle mode */
#define WDCC_SLEEP 0xe6 /* enter sleep mode */
#define WDCC_STANDBY 0xe2 /* set standby timer & enter standby mode */
#define WDCC_STANDBY_IMMED 0xe0 /* enter standby mode */
#define WDCC_CHECK_PWR 0xe5 /* check power mode */
/* Subcommands for SET_FEATURES (features register ) */
#define WDSF_EN_WR_CACHE 0x02
#define WDSF_SET_MODE 0x03
#define WDSF_REASSIGN_EN 0x04
#define WDSF_RETRY_DS 0x33
#define WDSF_SET_CACHE_SGMT 0x54
#define WDSF_READAHEAD_DS 0x55
#define WDSF_POD_DS 0x66
#define WDSF_ECC_DS 0x77
#define WDSF_WRITE_CACHE_DS 0x82
#define WDSF_REASSIGN_DS 0x84
#define WDSF_ECC_EN 0x88
#define WDSF_RETRY_EN 0x99
#define WDSF_SET_CURRENT 0x9A
#define WDSF_READAHEAD_EN 0xAA
#define WDSF_PREFETCH_SET 0xAB
#define WDSF_POD_EN 0xCC
/* parameters uploaded to device/heads register */
#define WDSD_IBM 0xa0 /* forced to 512 byte sector, ecc */
#define WDSD_CHS 0x00 /* cylinder/head/sector addressing */
#define WDSD_LBA 0x40 /* logical block addressing */
/* Commands for ATAPI devices */
#define ATAPI_CHECK_POWER_MODE 0xe5
#define ATAPI_EXEC_DRIVE_DIAGS 0x90
#define ATAPI_IDLE_IMMEDIATE 0xe1
#define ATAPI_NOP 0x00
#define ATAPI_PKT_CMD 0xa0
#define ATAPI_IDENTIFY_DEVICE 0xa1
#define ATAPI_SOFT_RESET 0x08
#define ATAPI_SLEEP 0xe6
#define ATAPI_STANDBY_IMMEDIATE 0xe0
/* Bytes used by ATAPI_PACKET_COMMAND ( feature register) */
#define ATAPI_PKT_CMD_FTRE_DMA 0x01
#define ATAPI_PKT_CMD_FTRE_OVL 0x02
/* ireason */
#define WDCI_CMD 0x01 /* command(1) or data(0) */
#define WDCI_IN 0x02 /* transfer to(1) or from(0) the host */
#define WDCI_RELEASE 0x04 /* bus released until completion */
#define PHASE_CMDOUT (WDCS_DRQ | WDCI_CMD)
#define PHASE_DATAIN (WDCS_DRQ | WDCI_IN)
#define PHASE_DATAOUT WDCS_DRQ
#define PHASE_COMPLETED (WDCI_IN | WDCI_CMD)
#define PHASE_ABORTED 0
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