197 lines
7.0 KiB
C
197 lines
7.0 KiB
C
/* $NetBSD: ncr5380reg.h,v 1.9 1996/03/08 21:55:00 leo Exp $ */
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/*
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* Copyright (c) 1995 Leo Weppelman.
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* All rights reserved.
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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 Leo Weppelman.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _NCR5380REG_H
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#define _NCR5380REG_H
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/*
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* NCR5380 common interface definitions.
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*/
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/*
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* Register numbers: (first argument to GET/SET_5380_REG )
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*/
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#define NCR5380_DATA 0 /* Data register */
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#define NCR5380_ICOM 1 /* Initiator command register */
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#define NCR5380_MODE 2 /* Mode register */
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#define NCR5380_TCOM 3 /* Target command register */
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#define NCR5380_IDSTAT 4 /* Bus status register */
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#define NCR5380_DMSTAT 5 /* DMA status register */
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#define NCR5380_TRCV 6 /* Target receive register */
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#define NCR5380_IRCV 7 /* Initiator receive register */
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/*
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* Definitions for Initiator command register.
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*/
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#define SC_A_RST 0x80 /* RW - Assert RST */
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#define SC_TEST 0x40 /* W - Test mode */
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#define SC_AIP 0x40 /* R - Arbitration in progress */
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#define SC_LA 0x20 /* R - Lost arbitration */
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#define SC_A_ACK 0x10 /* RW - Assert ACK */
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#define SC_A_BSY 0x08 /* RW - Assert BSY */
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#define SC_A_SEL 0x04 /* RW - Assert SEL */
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#define SC_A_ATN 0x02 /* RW - Assert ATN */
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#define SC_ADTB 0x01 /* RW - Assert Data To Bus */
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/*
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* Definitions for mode register
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*/
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#define SC_B_DMA 0x80 /* RW - Block mode DMA (not on TT!) */
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#define SC_T_MODE 0x40 /* RW - Target mode */
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#define SC_E_PAR 0x20 /* RW - Enable parity check */
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#define SC_E_PARI 0x10 /* RW - Enable parity interrupt */
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#define SC_E_EOPI 0x08 /* RW - Enable End Of Process Interrupt */
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#define SC_MON_BSY 0x04 /* RW - Monitor BSY */
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#define SC_M_DMA 0x02 /* RW - Set DMA mode */
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#define SC_ARBIT 0x01 /* RW - Arbitrate */
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/*
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* Definitions for tcom register
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*/
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#define SC_LBS 0x80 /* RW - Last Byte Send (not on TT!) */
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#define SC_A_REQ 0x08 /* RW - Assert REQ */
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#define SC_A_MSG 0x04 /* RW - Assert MSG */
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#define SC_A_CD 0x02 /* RW - Assert C/D */
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#define SC_A_IO 0x01 /* RW - Assert I/O */
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/*
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* Definitions for idstat register
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*/
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#define SC_S_RST 0x80 /* R - RST is set */
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#define SC_S_BSY 0x40 /* R - BSY is set */
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#define SC_S_REQ 0x20 /* R - REQ is set */
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#define SC_S_MSG 0x10 /* R - MSG is set */
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#define SC_S_CD 0x08 /* R - C/D is set */
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#define SC_S_IO 0x04 /* R - I/O is set */
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#define SC_S_SEL 0x02 /* R - SEL is set */
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#define SC_S_PAR 0x01 /* R - Parity bit */
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/*
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* Definitions for dmastat register
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*/
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#define SC_END_DMA 0x80 /* R - End of DMA */
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#define SC_DMA_REQ 0x40 /* R - DMA request */
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#define SC_PAR_ERR 0x20 /* R - Parity error */
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#define SC_IRQ_SET 0x10 /* R - IRQ is active */
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#define SC_PHS_MTCH 0x08 /* R - Phase Match */
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#define SC_BSY_ERR 0x04 /* R - Busy error */
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#define SC_ATN_STAT 0x02 /* R - State of ATN line */
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#define SC_ACK_STAT 0x01 /* R - State of ACK line */
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#define SC_S_SEND 0x00 /* W - Start DMA output */
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#define SC_CLINT { /* Clear interrupts */ \
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int i = GET_5380_REG(NCR5380_IRCV); \
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}
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/*
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* Definition of SCSI-bus phases. The values are determined by signals
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* on the SCSI-bus. DO NOT CHANGE!
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* The values must be used to index the pointers in SCSI-PARMS.
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*/
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#define NR_PHASE 8
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#define PH_DATAOUT 0
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#define PH_DATAIN 1
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#define PH_CMD 2
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#define PH_STATUS 3
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#define PH_RES1 4
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#define PH_RES2 5
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#define PH_MSGOUT 6
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#define PH_MSGIN 7
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#define PH_OUT(phase) (!(phase & 1)) /* TRUE if output phase */
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#define PH_IN(phase) (phase & 1) /* TRUE if input phase */
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/*
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* Id of Host-adapter
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*/
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#define SC_HOST_ID 0x80
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/*
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* Base setting for 5380 mode register
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*/
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#define IMODE_BASE SC_E_PAR
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/*
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* SCSI completion status codes, should move to sys/scsi/????
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*/
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#define SCSMASK 0x1e /* status code mask */
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#define SCSGOOD 0x00 /* good status */
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#define SCSCHKC 0x02 /* check condition */
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#define SCSBUSY 0x08 /* busy status */
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#define SCSCMET 0x04 /* condition met / good */
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/*
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* Return values of check_intr()
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*/
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#define INTR_SPURIOUS 0
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#define INTR_RESEL 2
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#define INTR_DMA 3
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struct ncr_softc;
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struct req_q;
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/*
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* Function decls:
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*/
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static int transfer_pio __P((u_char *, u_char *, u_long *, int));
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static int wait_req_true __P((void));
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static int wait_req_false __P((void));
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static int scsi_select __P((struct req_q *, int));
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static int handle_message __P((struct req_q *, u_int));
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static void ack_message __P((void));
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static void nack_message __P((struct req_q *, u_char));
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static int information_transfer __P((struct ncr_softc *));
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static void reselect __P((struct ncr_softc *));
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static int dma_ready __P((void));
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static void transfer_dma __P((struct req_q *, u_int, int));
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static int check_autosense __P((struct req_q *, int));
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static int reach_msg_out __P((struct ncr_softc *, u_long));
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static int check_intr __P((struct ncr_softc *));
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void finish_req __P((struct req_q *));
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int command_size __P((u_char));
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void scsi_reset __P((void));
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static void scsi_reset_verbose __P((struct ncr_softc *, const char *));
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static int scsi_dmaok __P((struct req_q *));
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static void run_main __P((struct ncr_softc *));
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static void scsi_main __P((struct ncr_softc *));
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static void ncr_ctrl_intr __P((struct ncr_softc *));
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static void ncr_dma_intr __P((struct ncr_softc *));
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static void ncr_tprint __P((struct req_q *, char *, ...));
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static void ncr_aprint __P((struct ncr_softc *, char *, ...));
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void scsi_show __P((void));
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static void show_request __P((struct req_q *, char *));
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static void show_data_sense __P((struct scsi_xfer *));
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/* static void show_phase __P((struct req_q *, int)); */
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static void show_signals __P((u_char, u_char));
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#endif /* _NCR5380REG_H */
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