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/* $OpenBSD: scsi96reg.h,v 1.4 1996/10/23 04:52:03 briggs Exp $ */
/* $NetBSD: scsi96reg.h,v 1.5 1996/05/05 06:18:02 briggs Exp $ */
/*
* Copyright (C) 1994 Allen K. Briggs
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 SUCH DAMAGE.
*/
#ifndef _SCSI96REG_MACHINE_
#define _SCSI96REG_MACHINE_
typedef volatile unsigned char v_uchar;
#define PAD(x) u_char x [15];
struct ncr53c96regs {
v_uchar tcreg_lsb; /* r == ctc, w == stc */
PAD(pad0);
v_uchar tcreg_msb; /* r == ctc, w == stc */
PAD(pad1);
v_uchar fifo; /* fifo reg */
PAD(pad2);
v_uchar cmdreg; /* command reg */
PAD(pad3);
v_uchar statreg; /* status reg */
#define sdidreg statreg
PAD(pad4);
v_uchar instreg; /* interrupt status reg */
#define stimreg instreg
PAD(pad5);
v_uchar isreg; /* internal state reg */
PAD(pad6);
v_uchar fifostatereg; /* fifo state reg */
#define soffsetreg fifostatereg
PAD(pad7);
v_uchar ctrlreg1; /* control register 1 */
PAD(pad8);
v_uchar clkfactorreg; /* clock factor register */
PAD(pad9);
v_uchar ftmreg; /* forced test mode register */
PAD(pad10);
v_uchar ctrlreg2; /* control register 2 */
PAD(pad11);
v_uchar ctrlreg3; /* control register 3 */
PAD(pad12);
v_uchar unused1; /* unknown */
PAD(pad13);
v_uchar unused2; /* unknown */
PAD(pad14);
v_uchar dareg; /* data alignment register */
PAD(pad15);
};
#undef PAD
#define NCR96_CTCREG 0x0 /* Current transfer count. R */
/* 16 bits, LSB first. */
#define NCR96_STCREG 0x0 /* Short transfer count. W */
/* 16 bits, LSB first. */
#define NCR96_FFREG 0x2 /* FIFO register. R/W */
#define NCR96_CMDREG 0x3 /* Command register. R/W */
#define NCR96_DMA 0x80 /* This flag means to use DMA mode. */
/* Initiator Commands */
#define NCR96_CMD_INFOXFER 0x10 /* Information Transfer. */
#define NCR96_CMD_ICCS 0x11 /* Initiator Cmd Complete steps. */
#define NCR96_CMD_MSGACC 0x12 /* Message Accepted. */
#define NCR96_CMD_TPB 0x18 /* Transfer pad bytes. */
#define NCR96_CMD_SETATN 0x1A /* Set ATN */
#define NCR96_CMD_RESETATN 0x1B /* Reset ATN */
/* Target Commands -- skipped. */
/* Idle State Commands. */
#define NCR96_CMD_RESEL 0x40 /* Reselect steps */
#define NCR96_CMD_SEL 0x41 /* Select without ATN steps */
#define NCR96_CMD_SELATN 0x42 /* Select with ATN steps */
#define NCR96_CMD_SELATNS 0x43 /* Select with ATN and stop steps */
#define NCR96_CMD_ENSEL 0x44 /* Enable selection/reselection */
#define NCR96_CMD_DISSEL 0x45 /* Disable selection/reselection */
#define NCR96_CMD_SELATN3 0x46 /* Select with ATN3 */
/* General Commands. */
#define NCR96_CMD_NOOP 0x00 /* No Operation */
#define NCR96_CMD_CLRFIFO 0x01 /* Clear FIFO */
#define NCR96_CMD_RESETDEV 0x02 /* Reset Device */
#define NCR96_CMD_RESETBUS 0x03 /* Reset SCSI Bus */
#define NCR96_STATREG 0x4 /* Status register. R */
#define NCR96_STAT_INT 0x80 /* Interrupt */
#define NCR96_STAT_IOE 0x40 /* Illegal Operation Error */
#define NCR96_STAT_PE 0x20 /* Parity Error */
#define NCR96_STAT_CTZ 0x10 /* Count To Zero */
#define NCR96_STAT_GCV 0x08 /* Group Code Valid */
#define NCR96_STAT_PHASE 0x07 /* Mask for SCSI Phase */
#define NCR96_STAT_MSG 0x04 /* Message */
#define NCR96_STAT_CD 0x02 /* Command/Data */
#define NCR96_STAT_IO 0x01 /* Input/Output */
#define NCR96_SDIDREG 0x4 /* SCSI Dest. ID register. W */
#define NCR96_SDID_MASK 0x07 /* Mask for Dest. ID */
#define NCR96_INSTREG 0x5 /* Interrupt status register. R */
#define NCR96_ISR_SRST 0x80 /* SCSI Reset */
#define NCR96_ISR_INVAL 0x40 /* Invalid Command */
#define NCR96_ISR_DISCONN 0x20 /* Disconnected */
#define NCR96_ISR_SREQ 0x10 /* Service Request */
#define NCR96_ISR_SO 0x08 /* Successful Operation */
#define NCR96_ISR_RESEL 0x04 /* Relected */
#define NCR96_ISR_SELATN 0x02 /* Selected with ATN */
#define NCR96_ISR_SEL 0x01 /* Selected */
#define NCR96_STIMREG 0x5 /* SCSI Timeout register. W */
#define NCR96_ISREG 0x6 /* Internal state register. R */
#define NCR96_IS_MASK 0x0f /* Mask for non-reserved fields. */
#define NCR96_STPREG 0x6 /* Synch. Trans. per. register. W */
#define NCR96_STP_MASK 0x1f /* Mask for non-reserved fields. */
#define NCR96_CFISREG 0x7 /* Current FIFO/i.s. register. R */
#define NCR96_CF_MASK 0x1f /* Mask for current FIFO count. */
#define NCR96_SOFREG 0x7 /* Synch. Offset register. W */
#define NCR96_SOF_MASK 0x0f /* Mask for non-reserved fields. */
#define NCR96_CNTLREG1 0x8 /* Control register one. R/W */
#define NCR96_C1_ETM 0x80 /* Extended Timing mode */
#define NCR96_C1_DISR 0x40 /* Disable interrupt on SCSI Reset */
#define NCR96_C1_PTE 0x20 /* Parity Test Enable */
#define NCR96_C1_PERE 0x10 /* Parity Error Reporting Enable */
#define NCR96_C1_STE 0x08 /* Self Test Enable */
#define NCR96_C1_SCSIID_MSK 0x07 /* Chip SCSI ID Mask */
#define NCR96_CLKFREG 0x9 /* Clock Factor register. W */
#define NCR96_CLKF_MASK 0x07 /* Mask for non-reserved fields */
#define NCR96_FTMREG 0xA /* Forced Test Mode register. W */
#define NCR96_FTM_MASK 0x07 /* Mask for non-reserved fields */
#define NCR96_CNTLREG2 0xB /* Control register two. R/W */
#define NCR96_C2_DAE 0x80 /* Data alignment enable */
#define NCR96_C2_LSP 0x40 /* Latch SCSI Phase */
#define NCR96_C2_SBO 0x20 /* Select Byte Order */
#define NCR96_C2_TSDR 0x10 /* Tri-state DMA request */
#define NCR96_C2_S2FE 0x08 /* SCSI-2 Features Enable */
#define NCR96_C2_ACDPE 0x04 /* Abort on Cmd/Data parity error */
#define NCR96_C2_PGRP 0x02 /* Pass through/gen register parity */
#define NCR96_C2_PGDP 0x01 /* Pass through/gen data parity */
#define NCR96_CNTLREG3 0xC /* Control register three. R/W */
#define NCR96_C3_LBTM 0x04 /* Last byte transfer mode */
#define NCR96_C3_MDM 0x02 /* Modify DMA mode */
#define NCR96_C3_BS8 0x01 /* Burst Size 8 */
#define NCR96_DALREG 0xF /* Data alignment register. W */
#endif /* _SCSI96REG_MACHINE_ */
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