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