1/*	$NetBSD: atzscreg.h,v 1.3.16.3 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_ATZSCREG_H_
67#define _AMIGA_DEV_ATZSCREG_H_
68
69/*
70 * Hardware layout of the A2091 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/* This chip definition only defines the registers also present on the
82   A3000 SDMAC. */
83
84struct sdmac {
85	short		pad0[0x20];
86	vu_short ISTR;		/* Interrupt Status Register RO */
87	vu_short CNTR;		/* Control Register RW */
88	short		pad1[0x1e];
89	vu_int   WTC;		/* Word Transfer Count Register RW */
90	vu_int   ACR;		/* Address Count Register RW */
91	short		pad2[0x03];
92	vu_short DAWR;		/* DACK Width Register WO */
93	char		pad3;
94	vu_char  SASR;		/* sbic asr */
95	char		pad4;
96	vu_char	 SCMD;		/* sbic data */
97	short		pad5[0x26];
98	vu_short ST_DMA;	/* Start DMA Transfers RW-Strobe */
99	vu_short SP_DMA;	/* Stop DMA Transfers RW-Strobe */
100	vu_short CINT;		/* Clear Interrupts RW-Strobe */
101	short		pad6;
102	vu_short FLUSH;		/* Flush FIFO RW-Strobe */
103};
104
105/*
106 * value to go into DAWR
107 */
108#define DAWR_ATZSC	3	/* according to A3000T service-manual */
109
110/*
111 * bits defined for CNTR
112 */
113#define CNTR_TCEN	(1<<7)	/* Terminal Count Enable */
114#define CNTR_PREST	(1<<6)	/* Perp Reset (not implemented :-((( ) */
115#define CNTR_PDMD	(1<<5)  /* Perp Device Mode Select (1=SCSI,0=XT/AT) */
116#define CNTR_INTEN	(1<<4)	/* Interrupt Enable */
117#define CNTR_DDIR	(1<<3)	/* Device Direction. 1==rd host, wr to perp */
118
119/*
120 * bits defined for ISTR
121 */
122#define ISTR_INTX	(1<<8)	/* XT/AT Interrupt pending */
123#define ISTR_INT_F	(1<<7)	/* Interrupt Follow */
124#define ISTR_INTS	(1<<6)	/* SCSI Peripheral Interrupt */
125#define ISTR_E_INT	(1<<5)	/* End-Of-Process Interrupt */
126#define ISTR_INT_P	(1<<4)	/* Interrupt Pending */
127#define ISTR_UE_INT	(1<<3)	/* Under-Run FIFO Error Interrupt */
128#define ISTR_OE_INT	(1<<2)	/* Over-Run FIFO Error Interrupt */
129#define ISTR_FF_FLG	(1<<1)	/* FIFO-Full Flag */
130#define ISTR_FE_FLG	(1<<0)	/* FIFO-Empty Flag */
131
132#endif /* _AMIGA_DEV_ATZSCREG_H_ */
133