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 
28 struct 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