sys/arch/next68k/stand/boot/scsivar.h

   1 /*      $NetBSD: scsivar.h,v 1.1.1.1 1998/01/16 05:53:30 jewell 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); }