drivers/scsi/a2091.h

   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 */