71 lines
2.9 KiB
C
71 lines
2.9 KiB
C
/* $NetBSD: espreg.h,v 1.2 2008/04/28 20:23:53 martin Exp $ */
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/*-
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* Copyright (c) 1997, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jaromir Dolecek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* MCA NCR 53C90 86C01 DMA controller registers.
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*
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* Information got from Tymm Twillman <tymm@computer.org>'s
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* Linux MCA NC53c90 driver drivers/scsi/mca_53c9x.c.
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*/
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#define N86C01_CARDID_LOW 0x00 /* CardId, lower byte */
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#define N86C01_CARDID_HIGH 0x01 /* CardId, high byte */
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#define N86C01_MODE_ENABLE 0x02 /* Mode enable register */
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#define N86C01_DATA_WIDTH 0x80 /* data width - 1=16 0=8 */
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#define N86C01_INTR_ENABLE 0x40 /* enable inrerrupts 1=enable*/
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#define N86C01_INTR_SELECT_MSK 0x30 /* IRQ select - see ADF */
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#define N86C01_IOADDR_MSK 0x0e /* Base Address - see ADF */
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#define N86C01_CARD_ENABLE 0x01 /* Card enable - 1=enabled */
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#define N86C01_DMA_CTRL 0x03 /* DMA control */
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#define N86C01_DMA_ENABLE 0x80 /* DMA enable - 1=enabled */
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#define N86C01_PREEMPT_CNT_MSK 0x60
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/* Preemt Count Select - number of transfers to complete after
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* the chip is preempted on MCA bus
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* 0 0 = 0
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* 0 1 = 1
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* 1 0 = 3
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* 1 1 = 7
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*/
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#define N86C01_FAIRNESS_EN 0x10 /* Fairness enable 1=enable */
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#define N86C01_DMA_ARB_MSK 0x0f /* DMA Arbitration lvl */
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#define N86C01_GENERAL 0x04 /* General purpose register */
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/* Bits 7,6 apply to SCSI Id selection in ADF, 5-3 user definable, 2-0 reserv*/
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#define N86C01_PIO 0x0a /* IO-based DMA, PIO */
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#define N86C01_STATUS 0x0c /* Status */
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#define N86C01_DMA_PEND 0x02 /* DMA pending 1=pending */
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#define N86C01_IRQ_PEND 0x01 /* IRQ pending 0=pending */
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