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Annotation of kernel/bsd/dev/ppc/drvApple96_SCSI/Apple96Hardware.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   1997.02.13      Initial conversion from AMDPCSCSIDriver sources.
        !            30:  *
        !            31:  * Set tabs every 4 characters.
        !            32:  *
        !            33:  * Apple96PCISCSI.h - Architecture-specific methods for Apple96 SCSI driver.
        !            34:  * Apple96SCSI is closely based on Doug Mitchell's AMD 53C974/79C974 driver.
        !            35:  *
        !            36:  * Edit History
        !            37:  * 1997.02.13  MM              Initial conversion from AMDPCSCSIDriver sources. 
        !            38:  */
        !            39: 
        !            40: #import "Apple96SCSI.h"
        !            41: 
        !            42: /*
        !            43:  * Return values from -hardwareStart.
        !            44:  */
        !            45: typedef enum {
        !            46:        kHardwareStartOK,                       /* command started successfully                 */
        !            47:        kHardwareStartRejected,         /* command rejected, try another                */
        !            48:        kHardwareStartBusy                      /* hardware not ready for command               */
        !            49: } HardwareStartResult;
        !            50: 
        !            51: @interface Apple96_SCSI(Hardware)
        !            52: 
        !            53: /**
        !            54:  * Perform one-time-only architecture-specific init.
        !            55:  * Return self on success, nil on failure.
        !            56:  */
        !            57: - hardwareInitialization
        !            58:                                                : deviceDescription;
        !            59: 
        !            60: 
        !            61: 
        !            62: /**
        !            63:  * Reusable hardware initization function. This includes a SCSI reset.
        !            64:  * Handling of ioComplete of active and disconnected commands must be done
        !            65:  * elsewhere. Returns IO_R_SUCCESS if successful. This is called
        !            66:  * from a Task thread. It will disable and re-enable interrupts.
        !            67:  * Reason is for error logging.
        !            68:  */
        !            69: - (IOReturn)   hardwareReset
        !            70:                                                : (Boolean) resetSCSIBus
        !            71:                        reason          : (const char *) reason;
        !            72: 
        !            73: /**
        !            74:  * Initialize volatile target options at start and
        !            75:  * after bus reset. This initializes synchronous transfer
        !            76:  * It does not reset disable command queue or disable select
        !            77:  * with ATN states.
        !            78:  */
        !            79: - (void)       initializePerTargetData;
        !            80: /**
        !            81:  * Initialize the synchronous data transfer state for a target.
        !            82:  */
        !            83: - (void)       renegotiateSyncMode
        !            84:                                                : (UInt8) target;
        !            85: 
        !            86: /*
        !            87:  * Start a SCSI transaction for the command in cmdBuf. gActiveCommand must be 
        !            88:  * NULL. A return of kHardwareStartRejected indicates that caller may try
        !            89:  * again with another command; kHardwareStartBusy indicates a condition
        !            90:  * other than (gActiveCommand != NULL) which prevents the processing of
        !            91:  * the command. The command will have been enqueued on gPendingCommandQueue
        !            92:  * in the latter case. The command will have been ioComplete'd in the
        !            93:  * kHardwareStartRejected case.
        !            94:  */
        !            95: - (HardwareStartResult) hardwareStart
        !            96:                                                : (CommandBuffer *) cmdBuf;
        !            97: 
        !            98: @end /* Apple96_SCSI(Hardware) */
        !            99: 

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