drivers/scsi/AM53C974.h

   1 /* AM53/79C974 (PCscsi) driver release 0.5
   2
   3  * The architecture and much of the code of this device
   4  * driver was originally developed by Drew Eckhardt for
   5  * the NCR5380. The following copyrights apply:
   6  *  For the architecture and all parts similar to the NCR5380:
   7  *    Copyright 1993, Drew Eckhardt
   8  *      Visionary Computing
   9  *      (Unix and Linux consulting and custom programming)
  10  *      drew@colorado.edu
  11  *      +1 (303) 666-5836
  12  *
  13  *  The AM53C974_nobios_detect code was originally developed by
  14  *   Robin Cutshaw (robin@xfree86.org) and is used here in a
  15  *   modified form.
  16  *
  17  *  For the other parts:
  18  *    Copyright 1994, D. Frieauff
  19  *    EMail: fri@rsx42sun0.dofn.de
  20  *    Phone: x49-7545-8-2256 , x49-7541-42305
  21  */
  22
  23 /*
  24  * $Log: AM53C974.h,v $
  25  */
  26
  27 #ifndef AM53C974_H
  28 #define AM53C974_H
  29
  30 #include <scsi/scsicam.h>
  31
  32 struct AM53C974_hostdata {
  33         volatile unsigned in_reset:1;   /* flag, says bus reset pending */
  34         volatile unsigned aborted:1;    /* flag, says aborted */
  35         volatile unsigned selecting:1;  /* selection started, but not yet finished */
  36         volatile unsigned disconnecting: 1;     /* disconnection started, but not yet finished */
  37         volatile unsigned dma_busy:1;   /* dma busy when service request for info transfer received */
  38         volatile unsigned char msgout[10];      /* message to output in MSGOUT_PHASE */
  39         volatile unsigned char last_message[10];        /* last message OUT */
  40         volatile Scsi_Cmnd *issue_queue;        /* waiting to be issued */
  41         volatile Scsi_Cmnd *disconnected_queue;         /* waiting for reconnect */
  42         volatile Scsi_Cmnd *sel_cmd;    /* command for selection */
  43         volatile Scsi_Cmnd *connected;  /* currently connected command */
  44         volatile unsigned char busy[8];         /* index = target, bit = lun */
  45         unsigned char sync_per[8];      /* synchronous transfer period (in effect) */
  46         unsigned char sync_off[8];      /* synchronous offset (in effect) */
  47         unsigned char sync_neg[8];      /* sync. negotiation performed (in effect) */
  48         unsigned char sync_en[8];       /* sync. negotiation performed (in effect) */
  49         unsigned char max_rate[8];      /* max. transfer rate (setup) */
  50         unsigned char max_offset[8];    /* max. sync. offset (setup), only valid if corresponding sync_en is nonzero */
  51 };
  52
  53 static int AM53C974_pci_detect(Scsi_Host_Template * tpnt);
  54 static int AM53C974_release(struct Scsi_Host *shp);
  55 static const char *AM53C974_info(struct Scsi_Host *);
  56 static int AM53C974_command(Scsi_Cmnd * SCpnt);
  57 static int AM53C974_queue_command(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *));
  58 static int AM53C974_abort(Scsi_Cmnd * cmd);
  59 static int AM53C974_reset(Scsi_Cmnd * cmd, unsigned int);
  60
  61 #endif                          /* AM53C974_H */