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