sys/arch/amiga/dev/ahscreg.h

   1 /*      $NetBSD: ahscreg.h,v 1.2.66.3 2004/09/21 13:12:25 skrll Exp $   */
   2
   3 /*
   4  * Copyright (c) 1982, 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)dmareg.h
  32  */
  33 /*
  34  * Copyright (c) 1994 Christian E. Hopps
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)dmareg.h
  65  */
  66 #ifndef _AMIGA_DEV_AHSCREG_H_
  67 #define _AMIGA_DEV_AHSCREG_H_
  68
  69 /*
  70  * Hardware layout of the A3000 SDMAC. This also contains the
  71  * registers for the sbic chip, but in favor of separating DMA and
  72  * scsi, the scsi-driver doesn't make use of this dependency
  73  */
  74
  75 #define v_char          volatile char
  76 #define v_int           volatile int
  77 #define vu_char         volatile u_char
  78 #define vu_short        volatile u_short
  79 #define vu_int          volatile u_int
  80
  81 struct sdmac {
  82         short           pad0;
  83         vu_short DAWR;          /* DACK Width Register WO */
  84         vu_int   WTC;           /* Word Transfer Count Register RW */
  85         short           pad1;
  86         vu_short CNTR;          /* Control Register RW */
  87         vu_int   ACR;           /* Address Count Register RW */
  88         short           pad2;
  89         vu_short ST_DMA;        /* Start DMA Transfers RW-Strobe */
  90         short           pad3;
  91         vu_short FLUSH;         /* Flush FIFO RW-Strobe */
  92         short           pad4;
  93         vu_short CINT;          /* Clear Interrupts RW-Strobe */
  94         short           pad5;
  95         vu_short ISTR;          /* Interrupt Status Register RO */
  96         int             pad6[7];
  97         short           pad7;
  98         vu_short SP_DMA;        /* Stop DMA Transfers RW-Strobe */
  99         char            pad8;
 100         vu_char  SASR;          /* sbic asr */
 101         char            pad9;
 102         vu_char  SCMD;          /* sbic data */
 103 };
 104
 105 /*
 106  * value to go into DAWR
 107  */
 108 #define DAWR_AHSC       3       /* according to A3000T service-manual */
 109
 110 /*
 111  * bits defined for CNTR
 112  */
 113 #define CNTR_TCEN       (1<<5)  /* Terminal Count Enable */
 114 #define CNTR_PREST      (1<<4)  /* Perp Reset (not implemented :-((( ) */
 115 #define CNTR_PDMD       (1<<3)  /* Perp Device Mode Select (1=SCSI,0=XT/AT) */
 116 #define CNTR_INTEN      (1<<2)  /* Interrupt Enable */
 117 #define CNTR_DDIR       (1<<1)  /* Device Direction. 1==rd host, wr perp */
 118 #define CNTR_IO_DX      (1<<0)  /* IORDY & CSX1 Polarity Select */
 119
 120 /*
 121  * bits defined for ISTR
 122  */
 123 #define ISTR_INTX       (1<<8)  /* XT/AT Interrupt pending */
 124 #define ISTR_INT_F      (1<<7)  /* Interrupt Follow */
 125 #define ISTR_INTS       (1<<6)  /* SCSI Peripheral Interrupt */
 126 #define ISTR_E_INT      (1<<5)  /* End-Of-Process Interrupt */
 127 #define ISTR_INT_P      (1<<4)  /* Interrupt Pending */
 128 #define ISTR_UE_INT     (1<<3)  /* Under-Run FIFO Error Interrupt */
 129 #define ISTR_OE_INT     (1<<2)  /* Over-Run FIFO Error Interrupt */
 130 #define ISTR_FF_FLG     (1<<1)  /* FIFO-Full Flag */
 131 #define ISTR_FE_FLG     (1<<0)  /* FIFO-Empty Flag */
 132
 133 #endif /* _AMIGA_DEV_AHSCREG_H_ */