#ifndef A2091_H
  #define A2091_H
  
  /* $Id: a2091.h,v 1.4 1997/01/19 23:07:09 davem Exp $
   *
   * Header file for the Commodore A2091 Zorro II SCSI controller for Linux
   *
   * Written and (C) 1993, Hamish Macdonald, see a2091.c for more info
   *
   */
  
  #include <linux/types.h>

  #ifndef CMD_PER_LUN

  #define CMD_PER_LUN		2

  #endif
  
  #ifndef CAN_QUEUE

  #define CAN_QUEUE		16

  #endif
  
  /*
   * if the transfer address ANDed with this results in a non-zero
   * result, then we can't use DMA.
   */

  #define A2091_XFER_MASK		(0xff000001)

  struct a2091_scsiregs {

  		 unsigned char	pad1[64];
  	volatile unsigned short	ISTR;
  	volatile unsigned short	CNTR;
  		 unsigned char	pad2[60];
  	volatile unsigned int	WTC;
  	volatile unsigned long	ACR;
  		 unsigned char	pad3[6];
  	volatile unsigned short	DAWR;
  		 unsigned char	pad4;
  	volatile unsigned char	SASR;
  		 unsigned char	pad5;
  	volatile unsigned char	SCMD;
  		 unsigned char	pad6[76];
  	volatile unsigned short	ST_DMA;
  	volatile unsigned short	SP_DMA;
  	volatile unsigned short	CINT;
  		 unsigned char	pad7[2];
  	volatile unsigned short	FLUSH;

  };

  
  #define DAWR_A2091		(3)
  
  /* CNTR bits. */
  #define CNTR_TCEN		(1<<7)
  #define CNTR_PREST		(1<<6)
  #define CNTR_PDMD		(1<<5)
  #define CNTR_INTEN		(1<<4)
  #define CNTR_DDIR		(1<<3)
  
  /* ISTR bits. */
  #define ISTR_INTX		(1<<8)
  #define ISTR_INT_F		(1<<7)
  #define ISTR_INTS		(1<<6)
  #define ISTR_E_INT		(1<<5)
  #define ISTR_INT_P		(1<<4)
  #define ISTR_UE_INT		(1<<3)
  #define ISTR_OE_INT		(1<<2)
  #define ISTR_FF_FLG		(1<<1)
  #define ISTR_FE_FLG		(1<<0)
  
  #endif /* A2091_H */