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