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espreg.h revision 1.1 
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 /*
     40  * MCA NCR 53C90 86C01 DMA controller registers.
     41  *
     42  * Information got from Tymm Twillman <tymm (at) computer.org>'s
     43  * Linux MCA NC53c90 driver drivers/scsi/mca_53c9x.c.
     44  */
     45 
     46 #define N86C01_CARDID_LOW	0x00		/* CardId, lower byte */
     47 
     48 #define N86C01_CARDID_HIGH	0x01		/* CardId, high byte */
     49 
     50 #define N86C01_MODE_ENABLE	0x02		/* Mode enable register */
     51 #define	 N86C01_DATA_WIDTH	0x80		/* data width - 1=16 0=8 */
     52 #define  N86C01_INTR_ENABLE	0x40		/* enable inrerrupts 1=enable*/
     53 #define  N86C01_INTR_SELECT_MSK	0x30		/* IRQ select - see ADF */
     54 #define  N86C01_IOADDR_MSK	0x0e		/* Base Address - see ADF */
     55 #define  N86C01_CARD_ENABLE	0x01		/* Card enable - 1=enabled */
     56 
     57 #define N86C01_DMA_CTRL		0x03		/* DMA control */
     58 #define  N86C01_DMA_ENABLE	0x80		/* DMA enable - 1=enabled */
     59 #define  N86C01_PREEMPT_CNT_MSK	0x60
     60 	/* Preemt Count Select - number of transfers to complete after
     61 	 * the chip is preempted on MCA bus
     62 	 *	0 0 = 0
     63 	 *	0 1 = 1
     64 	 *	1 0 = 3
     65 	 *	1 1 = 7
     66 	 */
     67 #define  N86C01_FAIRNESS_EN	0x10		/* Fairness enable 1=enable */
     68 #define  N86C01_DMA_ARB_MSK	0x0f		/* DMA Arbitration lvl */
     69 
     70 #define N86C01_GENERAL		0x04		/* General purpose register */
     71 /* Bits 7,6 apply to SCSI Id selection in ADF, 5-3 user definable, 2-0 reserv*/
     72 
     73 #define N86C01_PIO		0x0a		/* IO-based DMA, PIO */
     74 
     75 #define N86C01_STATUS		0x0c		/* Status */
     76 #define  N86C01_DMA_PEND	0x02		/* DMA pending 1=pending */
     77 #define  N86C01_IRQ_PEND	0x01		/* IRQ pending 0=pending */
     78