/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2000 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ident "%Z%%M% %I% %E% SMI"
/*
* The interrupt reason can be interpreted
* from other bits as follows:
*
* DRQ IO CoD
* --- -- ---
* 0 0 1 Idle
* 1 0 1 Send ATAPI CDB to device
* 1 1 0 Data from device
* 1 0 0 Data to device
* 1 1 1 Future use
* 0 1 1 Status ready
*
*/
ACTION
ATAPI Status Bits
Current |
State | idle cdb datain dataout status
|-----------------------------------------------------------------
idle | cmd cmd cmd cmd cmd
command | * sendcdb * * rd-intr-reason
cdb | * * start-xfer start-xfer rd-intr-reason
datain | * * continue-xfer * rd-intr-reason
dataout | * * * continue-xfer rd-intr-reason
NEXT-STATE
ATAPI Status Bits
Current |
State | idle cdb datain dataout status
|-----------------------------------------------------------------
idle | command command command command command
command | * cdb * * *
cdb | * * datain dataout (idle)
datain | * * datain * (idle)
dataout | * * * dataout (idle)
States marked '*' should be invalid but some non-complaint drives
don't transition correctly between states.