sys/dev/mca/espreg.h

   1 /*      $NetBSD: espreg.h,v 1.1 2001/12/04 20:47:58 jdolecek Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1997, 2001 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jaromir Dolecek.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * MCA NCR 53C90 86C01 DMA controller registers.
  34  *
  35  * Information got from Tymm Twillman <tymm@computer.org>'s
  36  * Linux MCA NC53c90 driver drivers/scsi/mca_53c9x.c.
  37  */
  38
  39 #define N86C01_CARDID_LOW       0x00            /* CardId, lower byte */
  40
  41 #define N86C01_CARDID_HIGH      0x01            /* CardId, high byte */
  42
  43 #define N86C01_MODE_ENABLE      0x02            /* Mode enable register */
  44 #define  N86C01_DATA_WIDTH      0x80            /* data width - 1=16 0=8 */
  45 #define  N86C01_INTR_ENABLE     0x40            /* enable inrerrupts 1=enable*/
  46 #define  N86C01_INTR_SELECT_MSK 0x30            /* IRQ select - see ADF */
  47 #define  N86C01_IOADDR_MSK      0x0e            /* Base Address - see ADF */
  48 #define  N86C01_CARD_ENABLE     0x01            /* Card enable - 1=enabled */
  49
  50 #define N86C01_DMA_CTRL         0x03            /* DMA control */
  51 #define  N86C01_DMA_ENABLE      0x80            /* DMA enable - 1=enabled */
  52 #define  N86C01_PREEMPT_CNT_MSK 0x60
  53         /* Preemt Count Select - number of transfers to complete after
  54          * the chip is preempted on MCA bus
  55          *      0 0 = 0
  56          *      0 1 = 1
  57          *      1 0 = 3
  58          *      1 1 = 7
  59          */
  60 #define  N86C01_FAIRNESS_EN     0x10            /* Fairness enable 1=enable */
  61 #define  N86C01_DMA_ARB_MSK     0x0f            /* DMA Arbitration lvl */
  62
  63 #define N86C01_GENERAL          0x04            /* General purpose register */
  64 /* Bits 7,6 apply to SCSI Id selection in ADF, 5-3 user definable, 2-0 reserv*/
  65
  66 #define N86C01_PIO              0x0a            /* IO-based DMA, PIO */
  67
  68 #define N86C01_STATUS           0x0c            /* Status */
  69 #define  N86C01_DMA_PEND        0x02            /* DMA pending 1=pending */
  70 #define  N86C01_IRQ_PEND        0x01            /* IRQ pending 0=pending */