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Annotation of kernel/bsd/dev/ppc/drvApple96_SCSI/Apple96BusState.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /**
        !            26:  * Copyright (c) 1994-1996 NeXT Software, Inc.  All rights reserved. 
        !            27:  * Copyright 1997 Apple Computer Inc. All Rights Reserved.
        !            28:  * @author     Martin Minow    mailto:[email protected]
        !            29:  * @revision   1997.02.17      Initial conversion from AMDPCSCSIDriver sources.
        !            30:  *
        !            31:  * Set tabs every 4 characters.
        !            32:  *
        !            33:  * Apple96BusState.h - Curio-specific methods for Apple96 SCSI driver.
        !            34:  * Apple96SCSI is closely based on Doug Mitchell's AMD 53C974/79C974 driver.
        !            35:  *
        !            36:  * Edit History
        !            37:  * 1997.02.18  MM              Initial conversion from AMDPCSCSIDriver sources. 
        !            38:  */
        !            39:  
        !            40: #import "Apple96SCSI.h"
        !            41: 
        !            42: @interface Apple96_SCSI(BusState)
        !            43: 
        !            44: /*
        !            45:  * Methods invoked upon interrupt. One per legal gBusState.
        !            46:  * These are actually private and are only called by hardwareInterrupt.
        !            47:  */
        !            48: - (void)                       fsmDisconnected;
        !            49: - (void)                       fsmHandleReselectionInterrupt;  /* Subroutine to fsmDisconnected */
        !            50: - (void)                       fsmSelecting;
        !            51: - (void)                       fsmReselecting;
        !            52: - (void)                       fsmReselectionAction;
        !            53: - (void)                       fsmInitiator;
        !            54: - (void)                       fsmCompleting;
        !            55: - (void)                       fsmWaitForBusFree;
        !            56: - (void)                       fsmDMAComplete;
        !            57: - (void)                       fsmSendingMsg;
        !            58: - (void)                       fsmSelecting;
        !            59: - (void)                       fsmGettingMsg;
        !            60: - (IOReturn)           fsmProcessMessage;
        !            61: - (void)                       fsmSelecting;
        !            62: - (void)                       fsmSendingCmd;
        !            63: - (void)                       fsmStartErrorRecovery
        !            64:                                                : (sc_status_t) status
        !            65:                        reason          : (const char *) reason;
        !            66: - (void)                       fsmErrorRecoveryInterruptService;
        !            67: - (void)                       fsmContinueErrorRecovery;
        !            68: 
        !            69: - (void)                       putMessageOutByte
        !            70:                                                : (UInt8)       messageByte
        !            71:                        setATN          : (Boolean) setATN;
        !            72: 
        !            73: /*
        !            74:  * This is called after an interrupt leaves us as SCS_RESELECTING
        !            75:  */
        !            76: - (void)                       fsmReselectionAction;
        !            77: /*
        !            78:  * This is is called after an interrupt leaves us as SCS_INITIATOR. 
        !            79:  */
        !            80: - (void)                       fsmPhaseChange;
        !            81: /*
        !            82:  * Common code (from fsmPhaseChange) to start DATI or DATO transfer.
        !            83:  */
        !            84: - (void)                       fsmStartDataPhase;
        !            85: /*
        !            86:  * Disable specified mode for activeCmd's target.
        !            87:  */
        !            88:  
        !            89: typedef enum {
        !            90:        kTargetModeCmdQueue
        !            91: } TargetMode;  
        !            92: 
        !            93: - (void)                       disableMode
        !            94:                                                : (TargetMode) mode;
        !            95: 
        !            96: /**
        !            97:  * Validate the target's reselection byte (put on the bus before
        !            98:  * reselecting us). Erase the initiator ID and convert the other
        !            99:  * bit into an index. The algorithm should be faster than a
        !           100:  * sequential search, but it probably doesn't matter much.
        !           101:  * @return     IO_R_SUCCESS if successful (gCurrentTarget is now valid).
        !           102:  *                     SR_IOST_BV if the select byte is incorrect.
        !           103:  * This function does not check whether there actually
        !           104:  * is a command pending for this target.
        !           105:  */
        !           106: - (IOReturn) getReselectionTargetID
        !           107:                                                : (UInt8) selectByte;
        !           108: 
        !           109: @end

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