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