1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef A2091_H
3#define A2091_H
4
5/* $Id: a2091.h,v 1.4 1997/01/19 23:07:09 davem Exp $
6 *
7 * Header file for the Commodore A2091 Zorro II SCSI controller for Linux
8 *
9 * Written and (C) 1993, Hamish Macdonald, see a2091.c for more info
10 *
11 */
12
13#include <linux/types.h>
14
15#ifndef CMD_PER_LUN
16#define CMD_PER_LUN		2
17#endif
18
19#ifndef CAN_QUEUE
20#define CAN_QUEUE		16
21#endif
22
23/*
24 * if the transfer address ANDed with this results in a non-zero
25 * result, then we can't use DMA.
26 */
27#define A2091_XFER_MASK		(0xff000001)
28
29struct a2091_scsiregs {
30		 unsigned char	pad1[64];
31	volatile unsigned short	ISTR;
32	volatile unsigned short	CNTR;
33		 unsigned char	pad2[60];
34	volatile unsigned int	WTC;
35	volatile unsigned long	ACR;
36		 unsigned char	pad3[6];
37	volatile unsigned short	DAWR;
38		 unsigned char	pad4;
39	volatile unsigned char	SASR;
40		 unsigned char	pad5;
41	volatile unsigned char	SCMD;
42		 unsigned char	pad6[76];
43	volatile unsigned short	ST_DMA;
44	volatile unsigned short	SP_DMA;
45	volatile unsigned short	CINT;
46		 unsigned char	pad7[2];
47	volatile unsigned short	FLUSH;
48};
49
50#define DAWR_A2091		(3)
51
52/* CNTR bits. */
53#define CNTR_TCEN		(1<<7)
54#define CNTR_PREST		(1<<6)
55#define CNTR_PDMD		(1<<5)
56#define CNTR_INTEN		(1<<4)
57#define CNTR_DDIR		(1<<3)
58
59/* ISTR bits. */
60#define ISTR_INTX		(1<<8)
61#define ISTR_INT_F		(1<<7)
62#define ISTR_INTS		(1<<6)
63#define ISTR_E_INT		(1<<5)
64#define ISTR_INT_P		(1<<4)
65#define ISTR_UE_INT		(1<<3)
66#define ISTR_OE_INT		(1<<2)
67#define ISTR_FF_FLG		(1<<1)
68#define ISTR_FE_FLG		(1<<0)
69
70#endif /* A2091_H */
71