147 lines
5.3 KiB
C
147 lines
5.3 KiB
C
/* $NetBSD: scireg.h,v 1.5 2003/08/07 16:26:44 agc Exp $ */
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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* 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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* Van Jacobson of Lawrence Berkeley Laboratory.
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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. 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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* @(#)scireg.h 7.3 (Berkeley) 2/5/91
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*/
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/*
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* NCR 5380 SCSI interface hardware description.
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*
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*/
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#if 0 /* for reference */
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typedef struct {
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unsigned char pad0[1];
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volatile unsigned char sci_data; /* r: Current data */
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#define sci_odata sci_data /* w: Out data */
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unsigned char pad1[1];
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volatile unsigned char sci_icmd; /* rw: Initiator command */
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unsigned char pad2[1];
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volatile unsigned char sci_mode; /* rw: Mode */
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unsigned char pad3[1];
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volatile unsigned char sci_tcmd; /* rw: Target command */
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unsigned char pad4[1];
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volatile unsigned char sci_bus_csr; /* r: Bus Status */
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#define sci_sel_enb sci_bus_csr /* w: Select enable */
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unsigned char pad5[1];
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volatile unsigned char sci_csr; /* r: Status */
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#define sci_dma_send sci_csr /* w: Start DMA send data */
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unsigned char pad6[1];
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volatile unsigned char sci_idata; /* r: Input data */
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#define sci_trecv sci_idata /* w: Start DMA receive, target */
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unsigned char pad7[1];
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volatile unsigned char sci_iack; /* r: Interrupt Acknowledge */
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#define sci_irecv sci_iack /* w: Start DMA receive, initiator */
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} sci_regmap_t;
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#endif
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/*
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* Initiator command register
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*/
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#define SCI_ICMD_DATA 0x01 /* rw: Assert data bus */
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#define SCI_ICMD_ATN 0x02 /* rw: Assert ATN signal */
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#define SCI_ICMD_SEL 0x04 /* rw: Assert SEL signal */
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#define SCI_ICMD_BSY 0x08 /* rw: Assert BSY signal */
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#define SCI_ICMD_ACK 0x10 /* rw: Assert ACK signal */
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#define SCI_ICMD_LST 0x20 /* r: Lost arbitration */
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#define SCI_ICMD_DIFF SCI_ICMD_LST /* w: Differential cable */
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#define SCI_ICMD_AIP 0x40 /* r: Arbitration in progress */
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#define SCI_ICMD_TEST SCI_ICMD_AIP /* w: Test mode */
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#define SCI_ICMD_RST 0x80 /* rw: Assert RST signal */
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/*
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* Mode register
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*/
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#define SCI_MODE_ARB 0x01 /* rw: Start arbitration */
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#define SCI_MODE_DMA 0x02 /* rw: Enable DMA xfers */
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#define SCI_MODE_MONBSY 0x04 /* rw: Monitor BSY signal */
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#define SCI_MODE_DMA_IE 0x08 /* rw: Enable DMA complete interrupt */
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#define SCI_MODE_PERR_IE 0x10 /* rw: Interrupt on parity errors */
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#define SCI_MODE_PAR_CHK 0x20 /* rw: Check parity */
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#define SCI_MODE_TARGET 0x40 /* rw: Target mode (Initiator if 0) */
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#define SCI_MODE_BLOCKDMA 0x80 /* rw: Block-mode DMA handshake (MBZ) */
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/*
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* Target command register
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*/
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#define SCI_TCMD_IO 0x01 /* rw: Assert I/O signal */
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#define SCI_TCMD_CD 0x02 /* rw: Assert C/D signal */
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#define SCI_TCMD_MSG 0x04 /* rw: Assert MSG signal */
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#define SCI_TCMD_PHASE_MASK 0x07 /* r: Mask for current bus phase */
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#define SCI_TCMD_REQ 0x08 /* rw: Assert REQ signal */
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#define SCI_TCMD_LAST_SENT 0x80 /* ro: Last byte was xferred
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* (not on 5380/1) */
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#define SCI_PHASE(x) ((x>>2) & 7)
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/*
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* Current (SCSI) Bus status
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*/
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#define SCI_BUS_DBP 0x01 /* r: Data Bus parity */
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#define SCI_BUS_SEL 0x02 /* r: SEL signal */
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#define SCI_BUS_IO 0x04 /* r: I/O signal */
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#define SCI_BUS_CD 0x08 /* r: C/D signal */
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#define SCI_BUS_MSG 0x10 /* r: MSG signal */
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#define SCI_BUS_REQ 0x20 /* r: REQ signal */
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#define SCI_BUS_BSY 0x40 /* r: BSY signal */
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#define SCI_BUS_RST 0x80 /* r: RST signal */
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#define SCI_CUR_PHASE(x) SCSI_PHASE((x)>>2)
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/*
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* Bus and Status register
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*/
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#define SCI_CSR_ACK 0x01 /* r: ACK signal */
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#define SCI_CSR_ATN 0x02 /* r: ATN signal */
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#define SCI_CSR_DISC 0x04 /* r: Disconnected (BSY==0) */
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#define SCI_CSR_PHASE_MATCH 0x08 /* r: Bus and SCI_TCMD match */
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#define SCI_CSR_INT 0x10 /* r: Interrupt request */
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#define SCI_CSR_PERR 0x20 /* r: Parity error */
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#define SCI_CSR_DREQ 0x40 /* r: DMA request */
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#define SCI_CSR_DONE 0x80 /* r: DMA count is zero */
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