| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef A2091_H |
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| 3 | #define A2091_H |
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| 4 | |
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| 5 | /* $Id: a2091.h,v 1.4 1997/01/19 23:07:09 davem Exp $ |
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| 6 | * |
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| 7 | * Header file for the Commodore A2091 Zorro II SCSI controller for Linux |
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| 8 | * |
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| 9 | * Written and (C) 1993, Hamish Macdonald, see a2091.c for more info |
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| 10 | * |
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| 11 | */ |
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| 12 | |
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| 13 | #include <linux/types.h> |
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| 14 | |
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| 15 | #ifndef CMD_PER_LUN |
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| 16 | #define CMD_PER_LUN 2 |
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| 17 | #endif |
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| 18 | |
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| 19 | #ifndef CAN_QUEUE |
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| 20 | #define CAN_QUEUE 16 |
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| 21 | #endif |
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| 22 | |
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| 23 | /* |
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| 24 | * if the transfer address ANDed with this results in a non-zero |
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| 25 | * result, then we can't use DMA. |
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| 26 | */ |
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| 27 | #define A2091_XFER_MASK (0xff000001) |
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| 28 | |
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| 29 | struct a2091_scsiregs { |
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| 30 | unsigned char pad1[64]; |
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| 31 | volatile unsigned short ISTR; |
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| 32 | volatile unsigned short CNTR; |
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| 33 | unsigned char pad2[60]; |
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| 34 | volatile unsigned int WTC; |
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| 35 | volatile unsigned long ACR; |
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| 36 | unsigned char pad3[6]; |
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| 37 | volatile unsigned short DAWR; |
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| 38 | unsigned char pad4; |
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| 39 | volatile unsigned char SASR; |
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| 40 | unsigned char pad5; |
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| 41 | volatile unsigned char SCMD; |
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| 42 | unsigned char pad6[76]; |
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| 43 | volatile unsigned short ST_DMA; |
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| 44 | volatile unsigned short SP_DMA; |
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| 45 | volatile unsigned short CINT; |
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| 46 | unsigned char pad7[2]; |
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| 47 | volatile unsigned short FLUSH; |
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| 48 | }; |
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| 49 | |
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| 50 | #define DAWR_A2091 (3) |
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| 51 | |
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| 52 | /* CNTR bits. */ |
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| 53 | #define CNTR_TCEN (1<<7) |
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| 54 | #define CNTR_PREST (1<<6) |
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| 55 | #define CNTR_PDMD (1<<5) |
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| 56 | #define CNTR_INTEN (1<<4) |
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| 57 | #define CNTR_DDIR (1<<3) |
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| 58 | |
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| 59 | /* ISTR bits. */ |
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| 60 | #define ISTR_INTX (1<<8) |
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| 61 | #define ISTR_INT_F (1<<7) |
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| 62 | #define ISTR_INTS (1<<6) |
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| 63 | #define ISTR_E_INT (1<<5) |
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| 64 | #define ISTR_INT_P (1<<4) |
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| 65 | #define ISTR_UE_INT (1<<3) |
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| 66 | #define ISTR_OE_INT (1<<2) |
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| 67 | #define ISTR_FF_FLG (1<<1) |
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| 68 | #define ISTR_FE_FLG (1<<0) |
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| 69 | |
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| 70 | #endif /* A2091_H */ |
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| 71 | |
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