a2091.h

Go to the documentation of this file.

#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 */