1 /* SPDX-License-Identifier: GPL-2.0 */
5 /* $Id: a2091.h,v 1.4 1997/01/19 23:07:09 davem Exp $
7 * Header file for the Commodore A2091 Zorro II SCSI controller for Linux
9 * Written and (C) 1993, Hamish Macdonald, see a2091.c for more info
13 #include <linux/types.h>
24 * if the transfer address ANDed with this results in a non-zero
25 * result, then we can't use DMA.
27 #define A2091_XFER_MASK (0xff000001)
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;
39 volatile unsigned char SASR;
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;
50 #define DAWR_A2091 (3)
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)
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)