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scsivar.h revision 1.1 
      1 /*	$NetBSD: scsivar.h,v 1.1 1998/06/09 07:53:06 dbj Exp $	*/
      2 /*
      3  * Copyright (c) 1994 Rolf Grossmann
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed by Rolf Grossmann.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 struct	scsi_softc {
     33     char sc_state;      /* controller state */
     34     short sc_result;	/* result of scsi command */
     35     /* saved interrupt state */
     36     u_char sc_status;     /* last 5390 status */
     37     u_char sc_seqstep;    /* last 5390 seqstep */
     38     u_char sc_intrstatus; /* last 5390 intrstatus */
     39     u_char sc_dmastatus;  /* mass-storage chip status */
     40 
     41     char *dma_addr;
     42     int dma_len;
     43 };
     44 
     45 /* scsi states */
     46 #define SCSI_IDLE	0
     47 #define SCSI_SELECTING	1
     48 #define SCSI_HASBUS	2
     49 #define SCSI_DMA	3
     50 #define SCSI_CLEANUP	4
     51 #define SCSI_DONE	5
     52 
     53 
     54 /* scsi phase bits */
     55 #define IOI	1
     56 #define CDI	2
     57 #define MSGI	4
     58 
     59 /* information transfer phases */
     60 #define DATA_OUT_PHASE	(0)
     61 #define DATA_IN_PHASE	(IOI)
     62 #define COMMAND_PHASE	(CDI)
     63 #define STATUS_PHASE	(CDI|IOI)
     64 #define MSG_OUT_PHASE	(MSGI|CDI)
     65 #define MSG_IN_PHASE	(MSGI|CDI|IOI)
     66 
     67 /* simple loop timeout */
     68 #define SCSI_TIMEOUT 2000000
     69 
     70 extern	struct scsi_softc scsi_softc;
     71 
     72 #define DELAY(n)        { register int N = (n); while (--N > 0); }
     73