239 lines
8.4 KiB
C
239 lines
8.4 KiB
C
/* $NetBSD: siireg.h,v 1.4 1994/10/26 21:09:22 cgd Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)siireg.h 8.1 (Berkeley) 6/10/93
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*
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* sii.h --
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*
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* SII registers.
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*
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* Copyright (C) 1989 Digital Equipment Corporation.
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby granted,
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* provided that the above copyright notice appears in all copies.
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* Digital Equipment Corporation makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* from: Header: /sprite/src/kernel/dev/ds3100.md/RCS/sii.h,
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* v 1.2 89/08/15 19:53:04 rab Exp SPRITE (DECWRL)
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*/
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#ifndef _SII
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#define _SII
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/*
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* SII hardware registers
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*/
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typedef volatile struct {
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u_short sdb; /* SCSI Data Bus and Parity */
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u_short pad0;
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u_short sc1; /* SCSI Control Signals One */
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u_short pad1;
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u_short sc2; /* SCSI Control Signals Two */
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u_short pad2;
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u_short csr; /* Control/Status register */
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u_short pad3;
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u_short id; /* Bus ID register */
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u_short pad4;
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u_short slcsr; /* Select Control and Status Register */
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u_short pad5;
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u_short destat; /* Selection Detector Status Register */
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u_short pad6;
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u_short dstmo; /* DSSI Timeout Register */
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u_short pad7;
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u_short data; /* Data Register */
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u_short pad8;
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u_short dmctrl; /* DMA Control Register */
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u_short pad9;
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u_short dmlotc; /* DMA Length of Transfer Counter */
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u_short pad10;
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u_short dmaddrl; /* DMA Address Register Low */
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u_short pad11;
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u_short dmaddrh; /* DMA Address Register High */
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u_short pad12;
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u_short dmabyte; /* DMA Initial Byte Register */
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u_short pad13;
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u_short stlp; /* DSSI Short Target List Pointer */
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u_short pad14;
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u_short ltlp; /* DSSI Long Target List Pointer */
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u_short pad15;
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u_short ilp; /* DSSI Initiator List Pointer */
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u_short pad16;
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u_short dsctrl; /* DSSI Control Register */
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u_short pad17;
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u_short cstat; /* Connection Status Register */
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u_short pad18;
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u_short dstat; /* Data Transfer Status Register */
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u_short pad19;
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u_short comm; /* Command Register */
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u_short pad20;
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u_short dictrl; /* Diagnostic Control Register */
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u_short pad21;
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u_short clock; /* Diagnostic Clock Register */
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u_short pad22;
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u_short bhdiag; /* Bus Handler Diagnostic Register */
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u_short pad23;
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u_short sidiag; /* SCSI IO Diagnostic Register */
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u_short pad24;
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u_short dmdiag; /* Data Mover Diagnostic Register */
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u_short pad25;
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u_short mcdiag; /* Main Control Diagnostic Register */
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u_short pad26;
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} SIIRegs;
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/*
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* SC1 - SCSI Control Signals One
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*/
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#define SII_SC1_MSK 0x1ff /* All possible signals on the bus */
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#define SII_SC1_SEL 0x80 /* SCSI SEL signal active on bus */
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#define SII_SC1_ATN 0x08 /* SCSI ATN signal active on bus */
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/*
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* SC2 - SCSI Control Signals Two
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*/
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#define SII_SC2_IGS 0x8 /* SCSI drivers for initiator mode */
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/*
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* CSR - Control/Status Register
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*/
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#define SII_HPM 0x10 /* SII in on an arbitrated SCSI bus */
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#define SII_RSE 0x08 /* 1 = respond to reselections */
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#define SII_SLE 0x04 /* 1 = respond to selections */
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#define SII_PCE 0x02 /* 1 = report parity errors */
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#define SII_IE 0x01 /* 1 = enable interrupts */
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/*
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* ID - Bus ID Register
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*/
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#define SII_ID_IO 0x8000 /* I/O */
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/*
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* DESTAT - Selection Detector Status Register
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*/
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#define SII_IDMSK 0x7 /* ID of target reselected the SII */
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/*
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* DMCTRL - DMA Control Register
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*/
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#define SII_ASYNC 0x00 /* REQ/ACK Offset for async mode */
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#define SII_SYNC 0x03 /* REQ/ACK Offset for sync mode */
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/*
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* DMLOTC - DMA Length Of Transfer Counter
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*/
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#define SII_TCMSK 0x1fff /* transfer count mask */
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/*
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* CSTAT - Connection Status Register
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*/
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#define SII_CI 0x8000 /* composite interrupt bit for CSTAT */
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#define SII_DI 0x4000 /* composite interrupt bit for DSTAT */
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#define SII_RST 0x2000 /* 1 if reset is asserted on SCSI bus */
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#define SII_BER 0x1000 /* Bus error */
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#define SII_OBC 0x0800 /* Out_en Bit Cleared (DSSI mode) */
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#define SII_TZ 0x0400 /* Target pointer Zero (STLP or LTLP is zero) */
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#define SII_BUF 0x0200 /* Buffer service - outbound pkt to non-DSSI */
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#define SII_LDN 0x0100 /* List element Done */
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#define SII_SCH 0x0080 /* State Change */
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#define SII_CON 0x0040 /* SII is Connected to another device */
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#define SII_DST 0x0020 /* SII was Destination of current transfer */
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#define SII_TGT 0x0010 /* SII is operating as a Target */
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#define SII_STATE_MSK 0x0070 /* State Mask */
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#define SII_SWA 0x0008 /* Selected With Attention */
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#define SII_SIP 0x0004 /* Selection In Progress */
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#define SII_LST 0x0002 /* Lost arbitration */
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/*
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* DSTAT - Data Transfer Status Register
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*/
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#define SII_DNE 0x2000 /* DMA transfer Done */
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#define SII_TCZ 0x1000 /* Transfer Count register is Zero */
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#define SII_TBE 0x0800 /* Transmit Buffer Empty */
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#define SII_IBF 0x0400 /* Input Buffer Full */
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#define SII_IPE 0x0200 /* Incoming Parity Error */
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#define SII_OBB 0x0100 /* Odd Byte Boundry */
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#define SII_MIS 0x0010 /* Phase Mismatch */
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#define SII_ATN 0x0008 /* ATN set by initiator if in Target mode */
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#define SII_MSG 0x0004 /* current bus state of MSG */
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#define SII_CD 0x0002 /* current bus state of C/D */
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#define SII_IO 0x0001 /* current bus state of I/O */
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#define SII_PHASE_MSK 0x0007 /* Phase Mask */
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/*
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* The different phases.
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*/
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#define SII_MSG_IN_PHASE 0x7
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#define SII_MSG_OUT_PHASE 0x6
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#define SII_STATUS_PHASE 0x3
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#define SII_CMD_PHASE 0x2
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#define SII_DATA_IN_PHASE 0x1
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#define SII_DATA_OUT_PHASE 0x0
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/*
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* COMM - Command Register
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*/
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#define SII_DMA 0x8000 /* DMA mode */
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#define SII_DO_RST 0x4000 /* Assert reset on SCSI bus for 25 usecs */
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#define SII_RSL 0x1000 /* 0 = select, 1 = reselect desired device */
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/* Commands: I - Initiator, T - Target, D - Disconnected */
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#define SII_INXFER 0x0800 /* Information Transfer command (I,T) */
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#define SII_SELECT 0x0400 /* Select command (D) */
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#define SII_REQDATA 0x0200 /* Request Data command (T) */
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#define SII_DISCON 0x0100 /* Disconnect command (I,T,D) */
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#define SII_CHRESET 0x0080 /* Chip Reset command (I,T,D) */
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/* Command state bits same as connection status register */
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/* Command phase bits same as data transfer status register */
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/*
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* DICTRL - Diagnostic Control Register
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*/
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#define SII_PRE 0x4 /* Enable the SII to drive the SCSI bus */
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#define SII_WAIT_COUNT 10000 /* Delay count used for the SII chip */
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/*
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* Max DMA transfer length for SII
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* The SII chip only has a 13 bit counter. If 8192 is used as the max count,
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* you can't tell the difference between a count of zero and 8192.
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* 8190 is used instead of 8191 so the count is even.
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*/
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#define SII_MAX_DMA_XFER_LENGTH 8192
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#endif /* _SII */
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