261 lines
9.2 KiB
C
261 lines
9.2 KiB
C
/* $NetBSD: ncr5380reg.h,v 1.18 2005/12/11 12:18:02 christos 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 device sc_dev;
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struct scsipi_channel sc_channel;
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struct scsipi_adapter sc_adapter;
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/*
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* Some (pre-SCSI2) devices don't support select with ATN.
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* If the device responds to select with ATN by going into
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* command phase (ignoring ATN), then we flag it in the
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* following bitmask.
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* We also keep track of which devices have been selected
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* before. This allows us to not even try raising ATN if
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* the target doesn't respond to it the first time.
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*/
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u_int8_t sc_noselatn;
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u_int8_t sc_selected;
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};
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/*
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* Max. number of DMA-chains per request
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*/
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#define MAXDMAIO (MAXPHYS/PAGE_SIZE + 1)
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/*
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* Some requests are not contiguous in physical memory. We need to break them
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* up into contiguous parts for DMA.
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*/
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struct dma_chain {
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u_int dm_count;
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u_long dm_addr;
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};
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/*
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* Define our issue, free and disconnect queue's.
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*/
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typedef struct req_q {
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struct req_q *next; /* next in free, issue or discon queue */
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struct req_q *link; /* next linked command to execute */
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struct scsipi_xfer *xs; /* request from high-level driver */
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u_short dr_flag; /* driver state */
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u_char phase; /* current SCSI phase */
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u_char msgout; /* message to send when requested */
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u_char targ_id; /* target for command */
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u_char targ_lun; /* lun for command */
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u_char status; /* returned status byte */
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u_char message; /* returned message byte */
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u_char *bounceb; /* allocated bounce buffer */
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u_char *bouncerp; /* bounce read-pointer */
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struct dma_chain dm_chain[MAXDMAIO];
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struct dma_chain *dm_cur; /* current DMA-request */
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struct dma_chain *dm_last; /* last DMA-request */
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long xdata_len; /* length of transfer */
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u_char *xdata_ptr; /* virtual address of transfer */
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struct scsipi_generic xcmd; /* command to execute */
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int xcmd_len; /* command length */
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} SC_REQ;
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/*
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* Values for dr_flag:
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*/
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#define DRIVER_IN_DMA 0x01 /* Non-polled DMA activated */
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#define DRIVER_AUTOSEN 0x02 /* Doing automatic sense */
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#define DRIVER_NOINT 0x04 /* We are booting: no interrupts */
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#define DRIVER_DMAOK 0x08 /* DMA can be used on this request */
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#define DRIVER_BOUNCING 0x10 /* Using the bounce buffer */
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#define DRIVER_LINKCHK 0x20 /* Doing the linked command check */
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/* XXX: Should go to ncr5380var.h */
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static SC_REQ *issue_q = NULL; /* Commands waiting to be issued*/
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static SC_REQ *discon_q = NULL; /* Commands disconnected */
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static SC_REQ *connected = NULL; /* Command currently connected */
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/*
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* Function decls:
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*/
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static int transfer_pio(u_char *, u_char *, u_long *, int);
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static int wait_req_true(void);
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static int wait_req_false(void);
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static int scsi_select(SC_REQ *, int);
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static int handle_message(SC_REQ *, u_int);
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static void ack_message(void);
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static void nack_message(SC_REQ *, u_char);
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static void finish_req(SC_REQ *);
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static int information_transfer(struct ncr_softc *);
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static void reselect(struct ncr_softc *);
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static int check_autosense(SC_REQ *, int);
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static int reach_msg_out(struct ncr_softc *, u_long);
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static int check_intr(struct ncr_softc *);
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static void scsi_reset(void);
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static void scsi_reset_verbose(struct ncr_softc *, const char *);
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static void run_main(struct ncr_softc *);
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static void scsi_main(struct ncr_softc *);
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static void ncr_ctrl_intr(struct ncr_softc *);
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static void ncr_tprint(SC_REQ *, const char *, ...);
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static void ncr_aprint(struct ncr_softc *, const char *, ...);
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static void show_data_sense(struct scsipi_xfer *);
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static void show_request(SC_REQ *, const char *);
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/* static void show_phase(SC_REQ *, int); */
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static void show_signals(u_char, u_char);
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#endif /* _NCR5380REG_H */
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