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Annotation of Examples/DriverKit/AMDPCSCSIDriver/AMDPCSCSIDriver_reloc.tproj/AMD_ChipPrivate.h, revision 1.1

1.1     ! root        1: /*     Copyright (c) 1994 NeXT Computer, Inc.  All rights reserved. 
        !             2:  *
        !             3:  * AMD_ChipPrivate.h - private structs and #defines for AMD_Chip category.
        !             4:  *
        !             5:  * HISTORY
        !             6:  * 1 Nov 94    Doug Mitchell at NeXT
        !             7:  *      Created. 
        !             8:  */
        !             9:  
        !            10: /*
        !            11:  * opcode groups
        !            12:  */
        !            13: #define        SCSI_OPGROUP(opcode)    ((opcode) & 0xe0)
        !            14: 
        !            15: #define        OPGROUP_0               0x00    /* six byte commands */
        !            16: #define        OPGROUP_1               0x20    /* ten byte commands */
        !            17: #define        OPGROUP_2               0x40    /* ten byte commands */
        !            18: #define        OPGROUP_5               0xa0    /* twelve byte commands */
        !            19: #define        OPGROUP_6               0xc0    /* six byte, vendor unique commands */
        !            20: #define        OPGROUP_7               0xe0    /* ten byte, vendor unique commands */
        !            21: 
        !            22: /*
        !            23:  * scsi bus phases
        !            24:  */
        !            25: #define        PHASE_DATAOUT           0x0
        !            26: #define        PHASE_DATAIN            0x1
        !            27: #define        PHASE_COMMAND           0x2
        !            28: #define        PHASE_STATUS            0x3
        !            29: #define        PHASE_MSGOUT            0x6
        !            30: #define        PHASE_MSGIN             0x7
        !            31: 
        !            32: /*
        !            33:  * message codes
        !            34:  */
        !            35: #define        MSG_CMDCMPLT            0x00    /* to host: command complete */
        !            36: #define MSG_EXTENDED           0x01    /* both ways: extended message */
        !            37: #define        MSG_SAVEPTRS            0x02    /* to host: save data pointers */
        !            38: #define        MSG_RESTOREPTRS         0x03    /* to host: restore pointers */
        !            39: #define        MSG_DISCONNECT          0x04    /* to host: disconnect */
        !            40: #define        MSG_IDETERR             0x05    /* to disk: initiator detected error */
        !            41: #define        MSG_ABORT               0x06    /* to disk: abort op, go to bus free */
        !            42: #define        MSG_MSGREJECT           0x07    /* both ways: last msg unimplemented */
        !            43: #define        MSG_NOP                 0x08    /* to disk: no-op message */
        !            44: #define        MSG_MSGPARERR           0x09    /* to disk: parity error last 
        !            45:                                           message */
        !            46: #define        MSG_LNKCMDCMPLT         0x0a    /* to host: linked command complete */
        !            47: #define        MSG_LNKCMDCMPLTFLAG     0x0b    /* to host: flagged linked cmd cmplt */
        !            48: #define        MSG_DEVICERESET         0x0c    /* to disk: reset and go to bus free */
        !            49: #define MSG_SIMPLE_QUEUE_TAG   0x20    /* both ways: simple queue tag */
        !            50: #define MSG_HEAD_QUEUE_TAG     0x21    /* to disk: head of queue tag */
        !            51: #define MSG_ORDERED_QUEUE_TAG  0x22    /* to disk: ordered queue tag */
        !            52: #define        MSG_IDENTIFYMASK        0x80    /* both ways: thread identification */
        !            53: #define        MSG_ID_DISCONN          0x40    /*      can disconnect/reconnect */
        !            54: #define        MSG_ID_LUNMASK          0x07    /*      target LUN */
        !            55: 
        !            56: /*
        !            57:  * Extended message codes
        !            58:  */
        !            59: #define MSG_SDTR               0x01    /* sync data transfer request */
        !            60: #define MSG_SDTR_LENGTH                5       /* total SDTR message length */
        !            61: 
        !            62: /*
        !            63:  * Delay, in ms, after SCSI reset.
        !            64:  */
        !            65: #define AMD_SCSI_RESET_DELAY   10000
        !            66: 
        !            67: /* 
        !            68:  * Private methods, used only by AMD_Chip module.
        !            69:  */
        !            70: 
        !            71: @interface AMD_SCSI(ChipPrivate)
        !            72: 
        !            73: /*
        !            74:  * Determine what kind of SCSI interrupt is pending, if any.
        !            75:  */
        !            76: 
        !            77: typedef enum { 
        !            78:        SINT_NONE,                      /* no interrupt */
        !            79:        SINT_DEVICE,                    /* 53C974 */
        !            80:        SINT_DMA,                       /* DMA (not currently used) */
        !            81:        SINT_OTHER                      /* ?? */
        !            82: } sintPending_t;
        !            83: 
        !            84: - (sintPending_t)scsiInterruptPending;
        !            85: 
        !            86: 
        !            87: /*
        !            88:  * Methods invoked upon interrupt. One per legal scState.
        !            89:  */
        !            90: - (void)fsmDisconnected;
        !            91: - (void)fsmSelecting;
        !            92: - (void)fsmInitiator;
        !            93: - (void)fsmCompleting;
        !            94: - (void)fsmDMAing;
        !            95: - (void)fsmAcceptingMsg;
        !            96: - (void)fsmSendingMsg;
        !            97: - (void)fsmSelecting;
        !            98: - (void)fsmGettingMsg;
        !            99: - (void)fsmSelecting;
        !           100: - (void)fsmSendingCmd;
        !           101: 
        !           102: /*
        !           103:  * This is is called after an interrupt leaves us as SCS_INITIATOR.
        !           104:  */
        !           105: - (void)fsmPhaseChange;
        !           106: 
        !           107: - (void)messageOut     : (unsigned char)msg;
        !           108: 
        !           109: /*
        !           110:  * Load syncPeriod, syncOffset for activeCmd per perTarget values.
        !           111:  */
        !           112: - (void)targetContext  : (unsigned)target;
        !           113: 
        !           114: /*
        !           115:  * Parse and validate 5-byte SDTR message. If valid, save in perTarget 
        !           116:  * and in hardware. Returns YES if valid, else NO.
        !           117:  * 
        !           118:  * Specified message buffer could be from either currMsgIn[] or 
        !           119:  * currMsgOut[].
        !           120:  */
        !           121: - (BOOL)parseSDTR              : (unsigned char *)sdtrMessage;
        !           122: 
        !           123: /*
        !           124:  * Cons up an SDTR message appropriate for both our hardware and a possible
        !           125:  * target-generated SDTR message. If inboundMsg is NULL, we just use
        !           126:  * the parameters we want.
        !           127:  */
        !           128: - (void)createSDTR             : (unsigned char *)outboundMsg  // required
        !           129:                     inboundMsg : (unsigned char *)inboundMsg;
        !           130:        
        !           131: /*
        !           132:  * Disable specified mode for activeCmd's target.
        !           133:  */
        !           134:  
        !           135: typedef enum {
        !           136:        AM_CmdQueue,
        !           137:        AM_Sync,
        !           138: } AMD_Mode;    
        !           139: 
        !           140: - (void)disableMode : (AMD_Mode)mode;
        !           141: 
        !           142: @end

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