/*      $NetBSD: atzscreg.h,v 1.5 2005/12/11 12:16:28 christos Exp $    */

/*
 * Copyright (c) 1982, 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)dmareg.h
 */
/*
 * Copyright (c) 1994 Christian E. Hopps
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)dmareg.h
 */
#ifndef _AMIGA_DEV_ATZSCREG_H_
#define _AMIGA_DEV_ATZSCREG_H_

/*
 * Hardware layout of the A2091 SDMAC. This also contains the
 * registers for the sbic chip, but in favor of separating DMA and
 * scsi, the scsi-driver doesn't make use of this dependency
 */

#define v_char          volatile char
#define v_int           volatile int
#define vu_char         volatile u_char
#define vu_short        volatile u_short
#define vu_int          volatile u_int

/* This chip definition only defines the registers also present on the
   A3000 SDMAC. */

struct sdmac {
        short           pad0[0x20];
        vu_short ISTR;          /* Interrupt Status Register RO */
        vu_short CNTR;          /* Control Register RW */
        short           pad1[0x1e];
        vu_int   WTC;           /* Word Transfer Count Register RW */
        vu_int   ACR;           /* Address Count Register RW */
        short           pad2[0x03];
        vu_short DAWR;          /* DACK Width Register WO */
        char            pad3;
        vu_char  SASR;          /* sbic asr */
        char            pad4;
        vu_char  SCMD;          /* sbic data */
        short           pad5[0x26];
        vu_short ST_DMA;        /* Start DMA Transfers RW-Strobe */
        vu_short SP_DMA;        /* Stop DMA Transfers RW-Strobe */
        vu_short CINT;          /* Clear Interrupts RW-Strobe */
        short           pad6;
        vu_short FLUSH;         /* Flush FIFO RW-Strobe */
};

/*
 * value to go into DAWR
 */
#define DAWR_ATZSC      3       /* according to A3000T service-manual */

/*
 * bits defined for CNTR
 */
#define CNTR_TCEN       (1<<7)  /* Terminal Count Enable */
#define CNTR_PREST      (1<<6)  /* Perp Reset (not implemented :-((( ) */
#define CNTR_PDMD       (1<<5)  /* Perp Device Mode Select (1=SCSI,0=XT/AT) */
#define CNTR_INTEN      (1<<4)  /* Interrupt Enable */
#define CNTR_DDIR       (1<<3)  /* Device Direction. 1==rd host, wr to perp */

/*
 * bits defined for ISTR
 */
#define ISTR_INTX       (1<<8)  /* XT/AT Interrupt pending */
#define ISTR_INT_F      (1<<7)  /* Interrupt Follow */
#define ISTR_INTS       (1<<6)  /* SCSI Peripheral Interrupt */
#define ISTR_E_INT      (1<<5)  /* End-Of-Process Interrupt */
#define ISTR_INT_P      (1<<4)  /* Interrupt Pending */
#define ISTR_UE_INT     (1<<3)  /* Under-Run FIFO Error Interrupt */
#define ISTR_OE_INT     (1<<2)  /* Over-Run FIFO Error Interrupt */
#define ISTR_FF_FLG     (1<<1)  /* FIFO-Full Flag */
#define ISTR_FE_FLG     (1<<0)  /* FIFO-Empty Flag */

#endif /* _AMIGA_DEV_ATZSCREG_H_ */