/* SPDX-License-Identifier: GPL-2.0 */
#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 */