/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1996-2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#ifndef _SYS_DADA_IMPL_COMMANDS_H
#define _SYS_DADA_IMPL_COMMANDS_H

#pragma ident   "%Z%%M% %I%     %E% SMI"

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Implementation dependent view of a ATA command descriptor block
 */

struct  dcd_cmd {
        uchar_t cmd;                            /* The ATA command */
        uchar_t address_mode;                   /* Mode of addressing */
        uchar_t direction;                      /* Not SCSI to be indicated */
        uchar_t  features;                      /* Any features to be enabled */
        uint_t  size;                           /* size in bytes */
        uint_t  version;                        /* version number */
        union {
                uint_t  lba_num;                /* LBA number if LBA */
                                                /* mode is used */
                struct  chs {
                        ushort_t        cylinder;       /* Cylinder Number */
                        uchar_t         head;           /* Head number */
                        uchar_t         sector;         /* Sector Number */
                } chs_address;
        } sector_num;
};

#define GETATACMD(cdb)  ((cdb)->cmd)

/*
 * Direct Access Device Capacity Structure
 */
struct dcd_capacity {
        uchar_t         heads;
        uchar_t         sectors;
        ushort_t        ncyls;
        uint_t          capacity;
        uint_t          lbasize;
};


/* The following are the defines for the commands. */

#define IDENTIFY                0xEC            /* Identify Device */
#define IDENTIFY_DMA            0xEE            /* Identify DMA    */
#define ATA_RECALIBRATE         0x10            /* Recalibrate */
#define ATA_READ                0x20            /* With retries */
#define ATA_WRITE               0x30            /* With retries */
#define ATA_SET_MULTIPLE        0xC6            /* Set Multiple */
#define ATA_READ_MULTIPLE       0xC4            /* Read Multiple */
#define ATA_WRITE_MULTIPLE      0xC5            /* Write Multiple */
#define ATA_READ_DMA            0xC8            /* Read DMA with retries */
#define ATA_WRITE_DMA           0xCA            /* Write DMA with reties */
#define ATA_SET_FEATURES        0xEF            /* Set features */
#define ATA_IDLE_IMMEDIATE      0xE1            /* Idle immediate */
#define ATA_STANDBY_IMMEDIATE   0xE0            /* Standby Immediate */
#define ATA_FLUSH_CACHE         0xE7            /* Flush Cache */
#define ATA_DOWNLOAD_MICROCODE  0x92            /* Download microcode */

/* The following are the defines for the direction. */

#define DATA_READ               0x01            /* READ from disk */
#define DATA_WRITE              0x02            /* WRITE to disk */
#define NO_DATA_XFER            0x00            /* No data xfer involved */

/* The following are the defines for the address mode */

#define ADD_LBA_MODE            0x01            /* LBA Mode of addressing */
#define ADD_CHS_MODE            0x02            /* Cylinder Head Sector mode */

/* The following are the usefull subcommands for set features command */
#define ATA_FEATURE_SET_MODE    0x03            /* This sets the mode */

/* The following are the masks which are used for enabling DMA or PIO */
#define ENABLE_PIO_FEATURE      0x08            /* PIO with flow control */
#define ENABLE_DMA_FEATURE      0x20            /* Enable DMA */
#define ENABLE_ULTRA_FEATURE    0x40            /* Enable ULTRA DMA */

#ifdef  __cplusplus
}
#endif

#endif /* _SYS_DADA_IMPL_COMMANDS_H */