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- #ifndef A2091_H
- #define A2091_H
- /* $Id: a2091.h,v 1.4 1997/01/19 23:07:09 davem Exp $
- *
- * Header file for the Commodore A2091 Zorro II SCSI controller for Linux
- *
- * Written and (C) 1993, Hamish Macdonald, see a2091.c for more info
- *
- */
- #include <linux/types.h>
- #ifndef CMD_PER_LUN
- #define CMD_PER_LUN 2
- #endif
- #ifndef CAN_QUEUE
- #define CAN_QUEUE 16
- #endif
- /*
- * if the transfer address ANDed with this results in a non-zero
- * result, then we can't use DMA.
- */
- #define A2091_XFER_MASK (0xff000001)
- struct a2091_scsiregs {
- unsigned char pad1[64];
- volatile unsigned short ISTR;
- volatile unsigned short CNTR;
- unsigned char pad2[60];
- volatile unsigned int WTC;
- volatile unsigned long ACR;
- unsigned char pad3[6];
- volatile unsigned short DAWR;
- unsigned char pad4;
- volatile unsigned char SASR;
- unsigned char pad5;
- volatile unsigned char SCMD;
- unsigned char pad6[76];
- volatile unsigned short ST_DMA;
- volatile unsigned short SP_DMA;
- volatile unsigned short CINT;
- unsigned char pad7[2];
- volatile unsigned short FLUSH;
- };
- #define DAWR_A2091 (3)
- /* CNTR bits. */
- #define CNTR_TCEN (1<<7)
- #define CNTR_PREST (1<<6)
- #define CNTR_PDMD (1<<5)
- #define CNTR_INTEN (1<<4)
- #define CNTR_DDIR (1<<3)
- /* ISTR bits. */
- #define ISTR_INTX (1<<8)
- #define ISTR_INT_F (1<<7)
- #define ISTR_INTS (1<<6)
- #define ISTR_E_INT (1<<5)
- #define ISTR_INT_P (1<<4)
- #define ISTR_UE_INT (1<<3)
- #define ISTR_OE_INT (1<<2)
- #define ISTR_FF_FLG (1<<1)
- #define ISTR_FE_FLG (1<<0)
- #endif /* A2091_H */
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