LXR linux/drivers/scsi/a2091.h

   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
  28struct 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