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 | |
29 | struct 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 | |