1271 lines
30 KiB
C
1271 lines
30 KiB
C
/* $NetBSD: ncr_si.c,v 1.1 1995/10/29 21:19:11 gwr Exp $ */
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/*
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* Copyright (c) 1995 David Jones
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* Copyright (c) 1994 Adam Glass, Gordon W. Ross
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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. The name of the authors 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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* 4. 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
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* Adam Glass, David Jones and Gordon Ross
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``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 AUTHORS 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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/*
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* This file contains only the machine-dependent parts of the
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* Sun3 SCSI driver. (Autoconfig stuff and DMA functions.)
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* The machine-independent parts are in ncr5380sbc.c
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*/
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#include <sys/types.h>
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#include <sys/malloc.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/device.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsi_debug.h>
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#include <scsi/scsiconf.h>
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#include <machine/autoconf.h>
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#include <machine/isr.h>
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#include <machine/obio.h>
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#include <machine/dvma.h>
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#if 0 /* XXX - not yet... */
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#include <dev/ic/ncr5380reg.h>
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#include <dev/ic/ncr5380var.h>
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#else
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#include "ncr5380reg.h"
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#include "ncr5380var.h"
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#endif
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#include "ncr_sireg.h"
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#include "am9516.h"
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/*
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* Transfers smaller than this are done using PIO
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* (on assumption they're not worth DMA overhead)
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*/
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#define MIN_DMA_LEN 128
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/*
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* Transfers lager than 63K need to be broken up
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* because some of the device counters are 16 bits.
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*/
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#define MAX_DMA_LEN 0xFC00
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/*
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* How many uS. to delay after touching the am9616 UDC.
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*/
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#define UDC_WAIT_USEC 5
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#define DEBUG XXX
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#ifdef DEBUG
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int si_debug = 0;
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static int si_flags = 0 /* | SDEV_DB2 */ ;
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static int Seq = 0;
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static int Nwrite = 0;
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struct si_softc *TheSoftC;
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volatile struct si_regs *TheRegs;
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void log_intr(void);
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void log_start(void);
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void si_printregs(void);
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#endif
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/*
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* This structure is used to keep track of mapped DMA requests.
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* Note: combined the UDC command block with this structure, so
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* the array of these has to be in DVMA space.
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*/
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struct si_dma_handle {
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u_long dh_addr; /* KVA of start of buffer */
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int dh_len; /* Original data length */
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u_long dh_dvma; /* VA of buffer in DVMA space */
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int dh_flags;
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#define SIDH_BUSY 1 /* This DH is in use */
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#define SIDH_OUT 2 /* DMA does data out (write) */
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/* DMA command block for the OBIO controller. */
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struct udc_table dh_cmd;
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};
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/*
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* The first structure member has to be the ncr5380_softc
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* so we can just cast to go back and fourth between them.
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*/
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struct si_softc {
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struct ncr5380_softc ncr;
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volatile struct si_regs *sc_regs;
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int sc_adapter_type;
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int sc_adapter_iv_am; /* int. vec + address modifier */
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int sc_timo;
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struct si_dma_handle *sc_dma;
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};
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/*
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* XXX: Note that reselect CAN NOT WORK given the current need
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* to set the damn FIFO count logic during dma_alloc, because
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* the DMA might be need by another target in the mean time.
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* (It works when there is only one target/lun though...)
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*/
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int si_permit_reselect = 0; /* XXX: Do not set this yet. */
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int si_polled_dma = 0; /* Set if interrupts don't work */
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/* How long to wait for DMA before declaring an error. */
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int si_dma_intr_timo = 500; /* ticks (sec. X 100) */
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static char si_name[] = "si";
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static int si_match();
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static void si_attach();
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static int si_intr(void *arg);
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static void si_reset_adapter(struct ncr5380_softc *sc);
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static void si_minphys(struct buf *bp);
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void si_dma_alloc __P((struct ncr5380_softc *));
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void si_dma_free __P((struct ncr5380_softc *));
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void si_dma_poll __P((struct ncr5380_softc *));
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void si_vme_dma_start __P((struct ncr5380_softc *));
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void si_vme_dma_eop __P((struct ncr5380_softc *));
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void si_vme_dma_stop __P((struct ncr5380_softc *));
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void si_obio_dma_start __P((struct ncr5380_softc *));
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void si_obio_dma_eop __P((struct ncr5380_softc *));
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void si_obio_dma_stop __P((struct ncr5380_softc *));
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static struct scsi_adapter si_ops = {
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ncr5380_scsi_cmd, /* scsi_cmd() */
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si_minphys, /* scsi_minphys() */
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NULL, /* open_target_lu() */
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NULL, /* close_target_lu() */
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};
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/* This is copied from julian's bt driver */
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/* "so we have a default dev struct for our link struct." */
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static struct scsi_device si_dev = {
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NULL, /* Use default error handler. */
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NULL, /* Use default start handler. */
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NULL, /* Use default async handler. */
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NULL, /* Use default "done" routine. */
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};
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struct cfdriver ncr_sicd = {
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NULL, si_name, si_match, si_attach, DV_DULL,
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sizeof(struct si_softc), NULL, 0,
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};
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static int
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si_print(aux, name)
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void *aux;
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char *name;
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{
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if (name != NULL)
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printf("%s: scsibus ", name);
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return UNCONF;
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}
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static int
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si_match(parent, vcf, args)
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struct device *parent;
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void *vcf, *args;
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{
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struct cfdata *cf = vcf;
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struct confargs *ca = args;
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int x, probe_addr;
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/* Default interrupt priority always splbio==2 */
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if (ca->ca_intpri == -1)
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ca->ca_intpri = 2;
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if ((cpu_machine_id == SUN3_MACH_50) ||
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(cpu_machine_id == SUN3_MACH_60) )
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{
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/* Sun3/50 or Sun3/60 have only OBIO "si" */
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if (ca->ca_bustype != BUS_OBIO)
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return(0);
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if (ca->ca_paddr == -1)
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ca->ca_paddr = OBIO_NCR_SCSI;
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/* OK... */
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} else {
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/* Other Sun3 models may have VME "si" or "sc" */
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if (ca->ca_bustype != BUS_VME16)
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return (0);
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if (ca->ca_paddr == -1)
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return (0);
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/* OK... */
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}
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/* Make sure there is something there... */
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x = bus_peek(ca->ca_bustype, ca->ca_paddr + 1, 1);
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if (x == -1)
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return (0);
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/*
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* If this is a VME SCSI board, we have to determine whether
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* it is an "sc" (Sun2) or "si" (Sun3) SCSI board. This can
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* be determined using the fact that the "sc" board occupies
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* 4K bytes in VME space but the "si" board occupies 2K bytes.
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*/
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if (ca->ca_bustype == BUS_VME16) {
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/* Note, the "si" board should NOT respond here. */
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x = bus_peek(ca->ca_bustype, ca->ca_paddr + 0x801, 1);
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if (x != -1)
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return(0);
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}
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return (1);
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}
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static void
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si_attach(parent, self, args)
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struct device *parent, *self;
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void *args;
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{
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struct si_softc *sc = (struct si_softc *) self;
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volatile struct si_regs *regs;
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struct confargs *ca = args;
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int i;
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switch (ca->ca_bustype) {
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case BUS_OBIO:
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regs = (struct si_regs *)
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obio_alloc(ca->ca_paddr, sizeof(*regs));
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isr_add_autovect(si_intr, (void *)sc,
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ca->ca_intpri);
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break;
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case BUS_VME16:
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regs = (struct si_regs *)
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bus_mapin(ca->ca_bustype, ca->ca_paddr, sizeof(*regs));
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isr_add_vectored(si_intr, (void *)sc,
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ca->ca_intpri, ca->ca_intvec);
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sc->sc_adapter_iv_am =
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VME_SUPV_DATA_24 | (ca->ca_intvec & 0xFF);
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break;
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default:
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printf("unknown\n");
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return;
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}
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printf("\n");
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/*
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* Fill in the prototype scsi_link.
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*/
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sc->ncr.sc_link.adapter_softc = sc;
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sc->ncr.sc_link.adapter_target = 7;
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sc->ncr.sc_link.adapter = &si_ops;
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sc->ncr.sc_link.device = &si_dev;
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/*
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* Initialize fields used by the MI code
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*/
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sc->ncr.sci_data = ®s->sci.sci_data;
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sc->ncr.sci_icmd = ®s->sci.sci_icmd;
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sc->ncr.sci_mode = ®s->sci.sci_mode;
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sc->ncr.sci_tcmd = ®s->sci.sci_tcmd;
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sc->ncr.sci_bus_csr = ®s->sci.sci_bus_csr;
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sc->ncr.sci_csr = ®s->sci.sci_csr;
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sc->ncr.sci_idata = ®s->sci.sci_idata;
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sc->ncr.sci_iack = ®s->sci.sci_iack;
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/*
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* MD function pointers used by the MI code.
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*/
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sc->ncr.sc_pio_out = ncr5380_pio_out;
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sc->ncr.sc_pio_in = ncr5380_pio_in;
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sc->ncr.sc_dma_alloc = si_dma_alloc;
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sc->ncr.sc_dma_free = si_dma_free;
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sc->ncr.sc_dma_poll = si_dma_poll;
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if (ca->ca_bustype == BUS_VME16) {
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sc->ncr.sc_dma_start = si_vme_dma_start;
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sc->ncr.sc_dma_eop = si_vme_dma_stop;
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sc->ncr.sc_dma_stop = si_vme_dma_stop;
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} else {
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sc->ncr.sc_dma_start = si_obio_dma_start;
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sc->ncr.sc_dma_eop = si_obio_dma_stop;
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sc->ncr.sc_dma_stop = si_obio_dma_stop;
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}
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sc->ncr.sc_flags = (si_permit_reselect) ?
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NCR5380_PERMIT_RESELECT : 0;
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sc->ncr.sc_min_dma_len = MIN_DMA_LEN;
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/*
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* Initialize fields used only here in the MD code.
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*/
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sc->sc_regs = regs;
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sc->sc_adapter_type = ca->ca_bustype;
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/* sc_adapter_iv_am = (was set above) */
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sc->sc_timo = 0; /* no timeout armed. */
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/* Need DVMA-capable memory for the UDC command blocks. */
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i = SCI_OPENINGS * sizeof(struct si_dma_handle);
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sc->sc_dma = (struct si_dma_handle *) dvma_malloc(i);
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if (sc->sc_dma == NULL)
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panic("si: dvma_malloc failed\n");
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for (i = 0; i < SCI_OPENINGS; i++)
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sc->sc_dma[i].dh_flags = 0;
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#ifdef DEBUG
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if (si_debug)
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printf("Set TheSoftC=%x TheRegs=%x\n", sc, regs);
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TheSoftC = sc;
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TheRegs = regs;
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sc->ncr.sc_link.flags |= si_flags;
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#endif
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/*
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* Initialize si board itself.
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*/
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si_reset_adapter(&sc->ncr);
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ncr5380_init(&sc->ncr);
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ncr5380_reset_scsibus(&sc->ncr);
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config_found(self, &(sc->ncr.sc_link), si_print);
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}
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static void
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si_minphys(struct buf *bp)
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{
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if (bp->b_bcount > MAX_DMA_LEN) {
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printf("si_minphys len = %x.\n", MAX_DMA_LEN);
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bp->b_bcount = MAX_DMA_LEN;
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}
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return (minphys(bp));
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}
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static int
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si_intr(void *arg)
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{
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struct si_softc *sc = arg;
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volatile struct si_regs *si = sc->sc_regs;
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int claimed, rv = 0;
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/* DMA interrupt? */
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if (si->si_csr & SI_CSR_DMA_IP) {
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rv |= SI_CSR_DMA_IP;
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(*sc->ncr.sc_dma_stop)(&sc->ncr);
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}
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/* SBC interrupt? */
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if (si->si_csr & SI_CSR_SBC_IP) {
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rv |= SI_CSR_SBC_IP;
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claimed = ncr5380_sbc_intr(&sc->ncr);
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#ifdef DEBUG
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if (!claimed) {
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printf("si_intr: spurious from SBC\n");
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if (si_debug & 4) {
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Debugger(); /* XXX */
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}
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}
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#endif
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}
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return (rv);
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}
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static void
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si_dma_timeout(arg)
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void *arg;
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{
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struct si_softc *sc = arg;
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int s;
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s = splbio();
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sc->sc_timo = 0;
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/* Timeout during DMA transfer? */
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if (sc->ncr.sc_dma_flags & DMA5380_INPROGRESS) {
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sc->ncr.sc_dma_flags |= DMA5380_ERROR;
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printf("si: DMA timeout (resetting)\n");
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si_reset_adapter(&sc->ncr);
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ncr5380_sbc_intr(&sc->ncr);
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}
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splx(s);
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}
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static void
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si_reset_adapter(struct ncr5380_softc *ncr)
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{
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struct si_softc *sc = (struct si_softc *)ncr;
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volatile struct si_regs *si = sc->sc_regs;
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#ifdef DEBUG
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if (si_debug) {
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printf("si_reset_adapter\n");
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}
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#endif
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/*
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* The SCSI3 controller has an 8K FIFO to buffer data between the
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* 5380 and the DMA. Make sure it starts out empty.
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*
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* The reset bits in the CSR are active low.
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*/
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si->si_csr = 0;
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delay(10);
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si->si_csr = SI_CSR_FIFO_RES | SI_CSR_SCSI_RES | SI_CSR_INTR_EN;
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delay(10);
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si->fifo_count = 0;
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if (sc->sc_adapter_type == BUS_VME16) {
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si->dma_addrh = 0;
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si->dma_addrl = 0;
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si->dma_counth = 0;
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si->dma_countl = 0;
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si->si_iv_am = sc->sc_adapter_iv_am;
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si->fifo_cnt_hi = 0;
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}
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SCI_CLR_INTR(ncr);
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}
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/*****************************************************************
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* Common functions for DMA
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****************************************************************/
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/*
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* Allocate a DMA handle and put it in sc->sc_dma. Prepare
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* for DMA transfer. On the Sun3, this means mapping the buffer
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* into DVMA space. dvma_mapin() flushes the cache for us.
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*/
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void
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si_dma_alloc(ncr)
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struct ncr5380_softc *ncr;
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{
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struct si_softc *sc = (struct si_softc *)ncr;
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volatile struct si_regs *si = sc->sc_regs;
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struct si_dma_handle *dh;
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int i, xlen;
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u_long addr;
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#if 1
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/* XXX - In case we don't trust interrupts... */
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if (si_polled_dma)
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sc->ncr.sc_dma_flags |= DMA5380_POLL;
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#endif
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addr = (u_long) sc->ncr.sc_dataptr;
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xlen = sc->ncr.sc_datalen;
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/* If the DMA start addr is misaligned then do PIO */
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if ((addr & 1) || (xlen & 1)) {
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printf("si_dma_alloc: misaligned.\n");
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goto no_dma;
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}
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/* Make sure our caller checked sc_min_dma_len. */
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if (xlen < MIN_DMA_LEN)
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panic("si_dma_alloc: xlen=0x%x\n", xlen);
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|
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/*
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* Never attempt single transfers of more than 63k, because
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* our count register may be only 16 bits (an OBIO adapter).
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* This should never happen since already bounded by minphys().
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*/
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|
if (xlen > MAX_DMA_LEN) {
|
|
printf("si_dma_alloc: excessive xlen=0x%x\n", xlen);
|
|
Debugger();
|
|
xlen = MAX_DMA_LEN;
|
|
}
|
|
|
|
/* Find free DMA handle. Guaranteed to find one since we have
|
|
as many DMA handles as the driver has processes. */
|
|
for (i = 0; i < SCI_OPENINGS; i++) {
|
|
if ((sc->sc_dma[i].dh_flags & SIDH_BUSY) == 0)
|
|
goto found;
|
|
}
|
|
panic("si: no free DMA handles.");
|
|
found:
|
|
|
|
dh = &sc->sc_dma[i];
|
|
sc->ncr.sc_dma_hand = dh;
|
|
dh->dh_addr = addr;
|
|
dh->dh_len = xlen;
|
|
dh->dh_flags = SIDH_BUSY;
|
|
|
|
/* Copy the "write" flag for convenience. */
|
|
if (sc->ncr.sc_dma_flags & DMA5380_WRITE)
|
|
dh->dh_flags |= SIDH_OUT;
|
|
|
|
/*
|
|
* We don't care about (sc_dma_flags & DMA5380_PHYS)
|
|
* because we always have to dup mappings anyway.
|
|
*/
|
|
dh->dh_dvma = (u_long) dvma_mapin((char *)addr, xlen);
|
|
if (!dh->dh_dvma) {
|
|
/* Can't remap segment */
|
|
printf("si_dma_alloc: can't remap %x/%x\n",
|
|
dh->dh_addr, dh->dh_len);
|
|
dh->dh_flags = 0;
|
|
goto no_dma;
|
|
}
|
|
|
|
/*
|
|
* Note: We have to initialize the FIFO logic NOW,
|
|
* (just after selection, before talking on the bus)
|
|
* because after this point, (much to my surprise)
|
|
* writes to the fifo_count register ARE IGNORED!!!
|
|
*/
|
|
si->fifo_count = 0; /* also hits dma_count */
|
|
if (dh->dh_flags & SIDH_OUT) {
|
|
si->si_csr |= SI_CSR_SEND;
|
|
} else {
|
|
si->si_csr &= ~SI_CSR_SEND;
|
|
}
|
|
si->si_csr &= ~SI_CSR_FIFO_RES; /* active low */
|
|
delay(10);
|
|
si->si_csr |= SI_CSR_FIFO_RES;
|
|
delay(10);
|
|
si->fifo_count = xlen;
|
|
if (sc->sc_adapter_type == BUS_VME16)
|
|
si->fifo_cnt_hi = 0;
|
|
|
|
#ifdef DEBUG
|
|
if ((si->fifo_count > xlen) || (si->fifo_count < (xlen - 1))) {
|
|
printf("si_dma_alloc: fifo_count=0x%x, xlen=0x%x\n",
|
|
si->fifo_count, xlen);
|
|
Debugger();
|
|
}
|
|
#endif
|
|
|
|
return; /* success */
|
|
|
|
no_dma:
|
|
sc->ncr.sc_dma_hand = NULL;
|
|
}
|
|
|
|
|
|
void
|
|
si_dma_free(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
struct si_dma_handle *dh = ncr->sc_dma_hand;
|
|
|
|
if (ncr->sc_dma_flags & DMA5380_INPROGRESS)
|
|
panic("si_dma_free: free while in progress");
|
|
|
|
if (dh->dh_flags & SIDH_BUSY) {
|
|
/* XXX - Should separate allocation and mapping. */
|
|
/* Give back the DVMA space. */
|
|
dvma_mapout((caddr_t)dh->dh_dvma, dh->dh_len);
|
|
dh->dh_dvma = 0;
|
|
dh->dh_flags = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Poll (spin-wait) for DMA completion.
|
|
* Same for either VME or OBIO.
|
|
*/
|
|
void
|
|
si_dma_poll(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
struct si_softc *sc = (struct si_softc *)ncr;
|
|
volatile struct si_regs *si = sc->sc_regs;
|
|
int tmo, csr_mask;
|
|
|
|
/* Make sure the DMA actually started... */
|
|
/* XXX - Check DMA5380_INPROGRESS instead? */
|
|
if (sc->ncr.sc_dma_flags & DMA5380_ERROR)
|
|
return;
|
|
|
|
csr_mask = SI_CSR_SBC_IP | SI_CSR_DMA_IP |
|
|
SI_CSR_DMA_CONFLICT | SI_CSR_DMA_BUS_ERR;
|
|
|
|
tmo = 50000; /* X100 = 5 sec. */
|
|
for (;;) {
|
|
if (si->si_csr & csr_mask)
|
|
break;
|
|
if (--tmo <= 0) {
|
|
printf("si: DMA timeout\n");
|
|
sc->ncr.sc_dma_flags |= DMA5380_ERROR;
|
|
si_reset_adapter(&sc->ncr);
|
|
break;
|
|
}
|
|
delay(100);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (si_debug) {
|
|
printf("si_dma_poll: done, csr=0x%x\n", si->si_csr);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
/*****************************************************************
|
|
* VME functions for DMA
|
|
****************************************************************/
|
|
|
|
|
|
void
|
|
si_vme_dma_start(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
struct si_softc *sc = (struct si_softc *)ncr;
|
|
struct si_dma_handle *dh = sc->ncr.sc_dma_hand;
|
|
volatile struct si_regs *si = sc->sc_regs;
|
|
u_long data_pa;
|
|
|
|
/*
|
|
* Get the DVMA mapping for this segment.
|
|
* XXX - Should separate allocation and mapin.
|
|
*/
|
|
data_pa = dvma_kvtopa((long)dh->dh_dvma, sc->sc_adapter_type) +
|
|
((u_long)sc->ncr.sc_dataptr - dh->dh_addr);
|
|
if (data_pa & 1)
|
|
panic("si_dma_start: bad pa=0x%x", data_pa);
|
|
|
|
#ifdef DEBUG
|
|
if (si_debug & 2) {
|
|
printf("si_dma_start: dh=0x%x, pa=0x%x, xlen=%d\n",
|
|
dh, data_pa, dh->dh_len);
|
|
}
|
|
#endif
|
|
|
|
/* Already setup FIFO in si_dma_alloc() */
|
|
|
|
#ifdef DEBUG
|
|
if ((si->fifo_count > dh->dh_len) ||
|
|
(si->fifo_count < (dh->dh_len - 1)))
|
|
{
|
|
printf("si_dma_start: fifo_count=0x%x, xlen=0x%x\n",
|
|
si->fifo_count, dh->dh_len);
|
|
Debugger();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Set up the DMA controller.
|
|
* Note that (dh-dh_len < sc_datalen)
|
|
*/
|
|
if (data_pa & 2) {
|
|
si->si_csr |= SI_CSR_BPCON;
|
|
} else {
|
|
si->si_csr &= ~SI_CSR_BPCON;
|
|
}
|
|
si->dma_addrh = data_pa >> 16;
|
|
si->dma_addrl = data_pa & 0xFFFF;
|
|
si->dma_counth = dh->dh_len >> 16;
|
|
si->dma_countl = dh->dh_len & 0xFFFF;
|
|
|
|
#if 0 /* XXX: Whack the FIFO again? */
|
|
si->si_csr &= ~SI_CSR_FIFO_RES;
|
|
delay(10);
|
|
si->si_csr |= SI_CSR_FIFO_RES;
|
|
delay(10);
|
|
#endif
|
|
|
|
/*
|
|
* Put the SBIC into DMA mode and start the transfer.
|
|
*/
|
|
*sc->ncr.sci_mode |= (SCI_MODE_DMA | SCI_MODE_DMA_IE);
|
|
if (dh->dh_flags & SIDH_OUT) {
|
|
*sc->ncr.sci_icmd = SCI_ICMD_DATA;
|
|
*sc->ncr.sci_dma_send = 0; /* start it */
|
|
} else {
|
|
*sc->ncr.sci_icmd = 0;
|
|
*sc->ncr.sci_irecv = 0; /* start it */
|
|
}
|
|
si->si_csr |= SI_CSR_DMA_EN; /* vme only */
|
|
|
|
sc->ncr.sc_dma_flags |= DMA5380_INPROGRESS;
|
|
|
|
if ((sc->ncr.sc_dma_flags & DMA5380_POLL) == 0) {
|
|
/* Expect an interrupt when DMA completes. */
|
|
sc->sc_timo = si_dma_intr_timo;
|
|
timeout(si_dma_timeout, sc, sc->sc_timo);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (si_debug & 2) {
|
|
printf("si_dma_start: started, flags=0x%x\n",
|
|
sc->ncr.sc_dma_flags);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
void
|
|
si_vme_dma_eop(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
|
|
/* Not needed - DMA was stopped prior to examining sci_csr */
|
|
}
|
|
|
|
|
|
void
|
|
si_vme_dma_stop(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
struct si_softc *sc = (struct si_softc *)ncr;
|
|
struct si_dma_handle *dh = sc->ncr.sc_dma_hand;
|
|
volatile struct si_regs *si = sc->sc_regs;
|
|
int resid, ntrans, si_csr;
|
|
|
|
if ((sc->ncr.sc_dma_flags & DMA5380_INPROGRESS) == 0) {
|
|
#ifdef DEBUG
|
|
printf("si_dma_stop: dma not running\n");
|
|
#endif
|
|
return;
|
|
}
|
|
sc->ncr.sc_dma_flags &= ~DMA5380_INPROGRESS;
|
|
if (sc->sc_timo) {
|
|
sc->sc_timo = 0;
|
|
untimeout(si_dma_timeout, sc);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
log_intr();
|
|
#endif
|
|
|
|
/* First, save csr bits and halt DMA. */
|
|
si_csr = si->si_csr;
|
|
si_csr &= ~SI_CSR_DMA_EN; /* VME only */
|
|
si->si_csr = si_csr;
|
|
|
|
if (si_csr & (SI_CSR_DMA_CONFLICT | SI_CSR_DMA_BUS_ERR)) {
|
|
printf("si: DMA error, csr=0x%x, reset\n", si_csr);
|
|
sc->ncr.sc_dma_flags |= DMA5380_ERROR;
|
|
si_reset_adapter(&sc->ncr);
|
|
}
|
|
|
|
/* Note that timeout may have set the error flag. */
|
|
if (sc->ncr.sc_dma_flags & DMA5380_ERROR)
|
|
goto out;
|
|
|
|
resid = si->fifo_count;
|
|
#ifdef DEBUG
|
|
if (resid != 0) {
|
|
printf("si_dma_stop: fifo resid=%d (ok?)\n", resid);
|
|
Debugger();
|
|
}
|
|
#endif
|
|
/* XXX - Was getting (resid==-1), fixed now. */
|
|
if (resid & ~3) {
|
|
printf("si: fifo count: 0x%x\n", resid);
|
|
sc->ncr.sc_dma_flags |= DMA5380_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
/* Adjust data pointer */
|
|
ntrans = dh->dh_len - resid;
|
|
sc->ncr.sc_dataptr += ntrans;
|
|
sc->ncr.sc_datalen -= ntrans;
|
|
|
|
#ifdef DEBUG
|
|
if (si_debug & 2) {
|
|
printf("si_dma_stop: ntrans=0x%x\n", ntrans);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* After a read, we may need to clean-up
|
|
* "Left-over bytes" (yuck!)
|
|
*/
|
|
if (((dh->dh_flags & SIDH_OUT) == 0) &&
|
|
((si->si_csr & SI_CSR_LOB) != 0))
|
|
{
|
|
char *cp = sc->ncr.sc_dataptr;
|
|
#ifdef DEBUG
|
|
printf("si: Got Left-over bytes!\n");
|
|
#endif
|
|
if (si->si_csr & SI_CSR_BPCON) {
|
|
/* have SI_CSR_BPCON */
|
|
cp[-1] = (si->si_bprl & 0xff00) >> 8;
|
|
} else {
|
|
switch (si->si_csr & SI_CSR_LOB) {
|
|
case SI_CSR_LOB_THREE:
|
|
cp[-3] = (si->si_bprh & 0xff00) >> 8;
|
|
cp[-2] = (si->si_bprh & 0x00ff);
|
|
cp[-1] = (si->si_bprl & 0xff00) >> 8;
|
|
break;
|
|
case SI_CSR_LOB_TWO:
|
|
cp[-2] = (si->si_bprh & 0xff00) >> 8;
|
|
cp[-1] = (si->si_bprh & 0x00ff);
|
|
break;
|
|
case SI_CSR_LOB_ONE:
|
|
cp[-1] = (si->si_bprh & 0xff00) >> 8;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
out:
|
|
si->dma_addrh = 0;
|
|
si->dma_addrl = 0;
|
|
|
|
/* Put SBIC back in PIO mode. */
|
|
*sc->ncr.sci_mode &= ~(SCI_MODE_DMA | SCI_MODE_DMA_IE);
|
|
*sc->ncr.sci_icmd = 0;
|
|
}
|
|
|
|
|
|
/*****************************************************************
|
|
* OBIO functions for DMA
|
|
****************************************************************/
|
|
|
|
|
|
static __inline__ void
|
|
si_obio_udc_write(si, regnum, value)
|
|
volatile struct si_regs *si;
|
|
int regnum, value;
|
|
{
|
|
delay(UDC_WAIT_USEC);
|
|
si->udc_addr = regnum;
|
|
delay(UDC_WAIT_USEC);
|
|
si->udc_data = value;
|
|
}
|
|
|
|
static __inline__ int
|
|
si_obio_udc_read(si, regnum)
|
|
volatile struct si_regs *si;
|
|
int regnum;
|
|
{
|
|
delay(UDC_WAIT_USEC);
|
|
si->udc_addr = regnum;
|
|
delay(UDC_WAIT_USEC);
|
|
return (si->udc_data);
|
|
}
|
|
|
|
|
|
void
|
|
si_obio_dma_start(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
struct si_softc *sc = (struct si_softc *)ncr;
|
|
struct si_dma_handle *dh = sc->ncr.sc_dma_hand;
|
|
volatile struct si_regs *si = sc->sc_regs;
|
|
struct udc_table *cmd;
|
|
u_long data_pa, cmd_pa;
|
|
|
|
/*
|
|
* Get the DVMA mapping for this segment.
|
|
* XXX - Should separate allocation and mapin.
|
|
*/
|
|
data_pa = dvma_kvtopa((long)dh->dh_dvma, sc->sc_adapter_type) +
|
|
((u_long)sc->ncr.sc_dataptr - dh->dh_addr);
|
|
if (data_pa & 1)
|
|
panic("si_dma_start: bad pa=0x%x", data_pa);
|
|
if (dh->dh_len & 1)
|
|
panic("si_dma_start: bad len=0x%x", dh->dh_len);
|
|
|
|
#ifdef DEBUG
|
|
if (si_debug & 2) {
|
|
printf("si_dma_start: dh=0x%x, pa=0x%x, xlen=%d\n",
|
|
dh, data_pa, dh->dh_len);
|
|
}
|
|
#endif
|
|
|
|
/* Already setup FIFO in si_dma_alloc() */
|
|
|
|
#ifdef DEBUG
|
|
if ((si->fifo_count > dh->dh_len) ||
|
|
(si->fifo_count < (dh->dh_len - 1)))
|
|
{
|
|
printf("si_dma_start: fifo_count=0x%x, xlen=0x%x\n",
|
|
si->fifo_count, dh->dh_len);
|
|
Debugger();
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Set up the DMA controller.
|
|
* Note that (dh-dh_len < sc_datalen)
|
|
*/
|
|
|
|
/*
|
|
* The OBIO controller needs a command block.
|
|
*/
|
|
cmd = &dh->dh_cmd;
|
|
cmd->addrh = ((data_pa & 0xFF0000) >> 8) | UDC_ADDR_INFO;
|
|
cmd->addrl = data_pa & 0xFFFF;
|
|
cmd->count = dh->dh_len / 2; /* bytes -> words */
|
|
cmd->cmrh = UDC_CMR_HIGH;
|
|
if (dh->dh_flags & SIDH_OUT) {
|
|
cmd->cmrl = UDC_CMR_LSEND;
|
|
cmd->rsel = UDC_RSEL_SEND;
|
|
} else {
|
|
cmd->cmrl = UDC_CMR_LRECV;
|
|
cmd->rsel = UDC_RSEL_RECV;
|
|
}
|
|
|
|
/* Tell the DMA chip where the control block is. */
|
|
cmd_pa = dvma_kvtopa((long)cmd, BUS_OBIO);
|
|
si_obio_udc_write(si, UDC_ADR_CAR_HIGH,
|
|
(cmd_pa & 0xff0000) >> 8);
|
|
si_obio_udc_write(si, UDC_ADR_CAR_LOW,
|
|
(cmd_pa & 0xffff));
|
|
|
|
/* Tell the chip to be a DMA master. */
|
|
si_obio_udc_write(si, UDC_ADR_MODE, UDC_MODE);
|
|
|
|
/* Tell the chip to interrupt on error. */
|
|
si_obio_udc_write(si, UDC_ADR_COMMAND, UDC_CMD_CIE);
|
|
|
|
/* Finally, give the UDC a "start chain" command. */
|
|
si_obio_udc_write(si, UDC_ADR_COMMAND, UDC_CMD_STRT_CHN);
|
|
|
|
/*
|
|
* Put the SBIC into DMA mode and start the transfer.
|
|
*/
|
|
*sc->ncr.sci_mode |= (SCI_MODE_DMA | SCI_MODE_DMA_IE);
|
|
if (dh->dh_flags & SIDH_OUT) {
|
|
*sc->ncr.sci_icmd = SCI_ICMD_DATA;
|
|
*sc->ncr.sci_dma_send = 0; /* start it */
|
|
} else {
|
|
*sc->ncr.sci_icmd = 0;
|
|
*sc->ncr.sci_irecv = 0; /* start it */
|
|
}
|
|
|
|
sc->ncr.sc_dma_flags |= DMA5380_INPROGRESS;
|
|
|
|
if ((sc->ncr.sc_dma_flags & DMA5380_POLL) == 0) {
|
|
/* Expect an interrupt when DMA completes. */
|
|
sc->sc_timo = si_dma_intr_timo;
|
|
timeout(si_dma_timeout, sc, sc->sc_timo);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (si_debug & 2) {
|
|
printf("si_dma_start: started, flags=0x%x\n",
|
|
sc->ncr.sc_dma_flags);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
void
|
|
si_obio_dma_eop(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
|
|
/* Not needed - DMA was stopped prior to examining sci_csr */
|
|
}
|
|
|
|
|
|
void
|
|
si_obio_dma_stop(ncr)
|
|
struct ncr5380_softc *ncr;
|
|
{
|
|
struct si_softc *sc = (struct si_softc *)ncr;
|
|
struct si_dma_handle *dh = sc->ncr.sc_dma_hand;
|
|
volatile struct si_regs *si = sc->sc_regs;
|
|
int resid, ntrans, tmo, udc_cnt;
|
|
|
|
if ((sc->ncr.sc_dma_flags & DMA5380_INPROGRESS) == 0) {
|
|
#ifdef DEBUG
|
|
printf("si_dma_stop: dma not running\n");
|
|
#endif
|
|
return;
|
|
}
|
|
sc->ncr.sc_dma_flags &= ~DMA5380_INPROGRESS;
|
|
if (sc->sc_timo) {
|
|
sc->sc_timo = 0;
|
|
untimeout(si_dma_timeout, sc);
|
|
}
|
|
|
|
if (si->si_csr & (SI_CSR_DMA_CONFLICT | SI_CSR_DMA_BUS_ERR)) {
|
|
printf("si: DMA error, csr=0x%x, reset\n", si->si_csr);
|
|
sc->ncr.sc_dma_flags |= DMA5380_ERROR;
|
|
si_reset_adapter(&sc->ncr);
|
|
}
|
|
|
|
/* Note that timeout may have set the error flag. */
|
|
if (sc->ncr.sc_dma_flags & DMA5380_ERROR)
|
|
goto out;
|
|
|
|
/* After a read, wait for the FIFO to empty. */
|
|
if ((dh->dh_flags & SIDH_OUT) == 0) {
|
|
/* XXX: This bit is not reliable. Beware! -dej */
|
|
tmo = 200000; /* X10 = 2 sec. */
|
|
for (;;) {
|
|
if (si->si_csr & SI_CSR_FIFO_EMPTY)
|
|
break;
|
|
if (--tmo <= 0) {
|
|
printf("si: dma fifo did not empty, reset\n");
|
|
sc->ncr.sc_dma_flags |= DMA5380_ERROR;
|
|
si_reset_adapter(&sc->ncr);
|
|
goto out;
|
|
}
|
|
delay(10);
|
|
}
|
|
}
|
|
|
|
|
|
resid = si->fifo_count;
|
|
#ifdef DEBUG
|
|
if (resid != 0) {
|
|
printf("si_dma_stop: fifo resid=%d (ok?)\n", resid);
|
|
Debugger();
|
|
}
|
|
#endif
|
|
/* XXX - Was getting (resid==-1), fixed now. */
|
|
if (resid & ~3) {
|
|
printf("si: fifo count: 0x%x\n", resid);
|
|
sc->ncr.sc_dma_flags |= DMA5380_ERROR;
|
|
goto out;
|
|
}
|
|
|
|
/* Adjust data pointer */
|
|
ntrans = dh->dh_len - resid;
|
|
sc->ncr.sc_dataptr += ntrans;
|
|
sc->ncr.sc_datalen -= ntrans;
|
|
|
|
#ifdef DEBUG
|
|
if (si_debug & 2) {
|
|
printf("si_dma_stop: ntrans=0x%x\n", ntrans);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* After a read, we may need to clean-up
|
|
* "Left-over bytes" (yuck!)
|
|
*/
|
|
if ((dh->dh_flags & SIDH_OUT) == 0) {
|
|
/* If odd transfer count, grab last byte by hand. */
|
|
if (ntrans & 1) {
|
|
sc->ncr.sc_dataptr[-1] =
|
|
(si->fifo_data & 0xff00) >> 8;
|
|
goto out;
|
|
}
|
|
/* UDC might not have transfered the last word. */
|
|
udc_cnt = si_obio_udc_read(si, UDC_ADR_COUNT);
|
|
if (((udc_cnt * 2) - si->fifo_count) == 2) {
|
|
sc->ncr.sc_dataptr[-2] =
|
|
(si->fifo_data & 0xff00) >> 8;
|
|
sc->ncr.sc_dataptr[-1] =
|
|
(si->fifo_data & 0x00ff);
|
|
}
|
|
}
|
|
|
|
out:
|
|
/* Reset the UDC. */
|
|
si_obio_udc_write(si, UDC_ADR_COMMAND, UDC_CMD_RESET);
|
|
|
|
/* Put SBIC back in PIO mode. */
|
|
*sc->ncr.sci_mode &= ~(SCI_MODE_DMA | SCI_MODE_DMA_IE);
|
|
*sc->ncr.sci_icmd = 0;
|
|
}
|
|
|
|
|
|
#if 0
|
|
int hexdigit(char c)
|
|
{
|
|
|
|
if (c >= '0' && c <= '9') return c - '0';
|
|
else return c - ('a' - 10);
|
|
}
|
|
|
|
|
|
struct scsi_link *thescsilink;
|
|
|
|
void sicmdloop(void)
|
|
{
|
|
char hexbuf[40];
|
|
int c, i, pos;
|
|
u_char cmdbuf[6];
|
|
|
|
while (1) {
|
|
pos = 0;
|
|
while (1) {
|
|
c = cngetc();
|
|
if ((c == 0x7F || c == 0x08) && pos) {
|
|
pos--;
|
|
cnputc(0x08);
|
|
cnputc(' ');
|
|
cnputc(0x08);
|
|
}
|
|
else if (c == '\r' || c == '\n') {
|
|
hexbuf[pos] = 0;
|
|
break;
|
|
}
|
|
else {
|
|
hexbuf[pos++] = c;
|
|
cnputc(c);
|
|
}
|
|
}
|
|
|
|
pos = 0;
|
|
for (i = 0; i < 6; i++) {
|
|
while (hexbuf[pos] == ' ') pos++;
|
|
cmdbuf[i] = 16 * hexdigit(hexbuf[pos++]) + hexdigit(hexbuf[pos++]);
|
|
}
|
|
|
|
scsi_scsi_cmd(thescsilink, (struct scsi_generic *)cmdbuf, 6,
|
|
0, 0, 1, 1000, 0, SCSI_POLL);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
#define NQENT 10
|
|
static int Qptr = 0;
|
|
static struct qent {
|
|
int seq;
|
|
int si_csr;
|
|
int sci_csr;
|
|
int sci_bus_csr;
|
|
long dma_addr, dma_count, fifo_len;
|
|
long start_addr, start_count, start_len;
|
|
} Qents[NQENT];
|
|
|
|
|
|
void log_start(void)
|
|
{
|
|
struct si_softc *sc = TheSoftC;
|
|
volatile struct si_regs *si = sc->sc_regs;
|
|
|
|
Qents[Qptr].start_addr = (si->dma_addrh << 16) + si->dma_addrl;
|
|
Qents[Qptr].start_count = (si->dma_counth << 16) + si->dma_countl;
|
|
Qents[Qptr].start_len = si->fifo_count;
|
|
Qents[Qptr].seq = Seq++;
|
|
}
|
|
|
|
|
|
void log_intr(void)
|
|
{
|
|
struct si_softc *sc = TheSoftC;
|
|
volatile struct si_regs *si = sc->sc_regs;
|
|
|
|
Qents[Qptr].si_csr = si->si_csr;
|
|
while (!(si->si_csr & SI_CSR_FIFO_EMPTY)) {
|
|
printf("log_intr: FIFO not empty before DMA disable at %d\n", Seq);
|
|
}
|
|
|
|
if (sc->sc_adapter_type == BUS_VME16)
|
|
si->si_csr &= ~SI_CSR_DMA_EN;
|
|
if (!(si->si_csr & SI_CSR_FIFO_EMPTY)) {
|
|
printf("log_intr: FIFO not empty after DMA disable at %d\n", Seq);
|
|
}
|
|
Qents[Qptr].dma_addr = (si->dma_addrh << 16) + si->dma_addrl;
|
|
|
|
Qents[Qptr].dma_count = (si->dma_counth << 16) + si->dma_countl;
|
|
Qents[Qptr].fifo_len = si->fifo_count;
|
|
Qents[Qptr].sci_csr = *sc->ncr.sci_csr;
|
|
Qents[Qptr].sci_bus_csr = *sc->ncr.sci_bus_csr;
|
|
Qptr++;
|
|
if (Qptr == NQENT) Qptr = 0;
|
|
}
|
|
|
|
|
|
void si_printregs(void)
|
|
{
|
|
struct si_softc *sc = TheSoftC;
|
|
volatile struct si_regs *si = TheRegs;
|
|
struct sci_req *sr;
|
|
int i;
|
|
int a, b, c, d;
|
|
|
|
if (!TheRegs) {
|
|
printf("TheRegs == NULL, please re-set!\n");
|
|
return;
|
|
}
|
|
|
|
c = si->si_csr;
|
|
printf("si->si_csr=%04x\n", c);
|
|
si->si_csr &= ~SI_CSR_DMA_EN;
|
|
|
|
a = si->dma_addrh; b = si->dma_addrl;
|
|
printf("si->dma_addr=%04x%04x\n", a, b);
|
|
|
|
/* printf("si->dma_addr=%04x%04x\n", si->dma_addrh, si->dma_addrl); */
|
|
printf("si->dma_count=%04x%04x\n", si->dma_counth, si->dma_countl);
|
|
printf("si->fifo_count=%04x\n", si->fifo_count);
|
|
printf("sci_icmd=%02x\n", si->sci.sci_icmd);
|
|
printf("sci_mode=%02x\n", si->sci.sci_mode);
|
|
printf("sci_tcmd=%02x\n", si->sci.sci_tcmd);
|
|
printf("sci_bus_csr=%02x\n", si->sci.sci_bus_csr);
|
|
printf("sci_csr=%02x\n", si->sci.sci_csr);
|
|
printf("sci_data=%02x\n\n", si->sci.sci_data);
|
|
|
|
if (!TheSoftC) {
|
|
printf("TheSoftC == NULL, can't continue.\n");
|
|
return;
|
|
}
|
|
|
|
printf("DMA handles:\n");
|
|
for (i = 0; i < SCI_OPENINGS; i++) {
|
|
if (sc->sc_dma[i].dh_flags & SIDH_BUSY) {
|
|
printf("%d: %x/%x => %x/%d %s\n", i,
|
|
sc->sc_dma[i].dh_addr,
|
|
sc->sc_dma[i].dh_len,
|
|
sc->sc_dma[i].dh_dvma,
|
|
sc->sc_dma[i].dh_flags,
|
|
(&sc->sc_dma[i] == sc->ncr.sc_dma_hand) ? "(active)" : "");
|
|
}
|
|
else {
|
|
printf("%d: idle\n", i);
|
|
}
|
|
}
|
|
|
|
printf("i\nsci_req queue:\n");
|
|
for (i = 0; i < SCI_OPENINGS; i++) {
|
|
sr = &sc->ncr.sc_ring[i];
|
|
printf("%d: %d/%d %x/%x => %x\n", i, sr->sr_target, sr->sr_lun,
|
|
sr->sr_data, sr->sr_datalen,
|
|
sr->sr_dma_hand);
|
|
}
|
|
printf("Total commands (sc_ncmds): %d\n", sc->ncr.sc_ncmds);
|
|
printf("\nCurrent SCSI data pointer: %x/%x\n", sc->ncr.sc_dataptr,
|
|
sc->ncr.sc_datalen);
|
|
}
|
|
|
|
void print_qent(void)
|
|
{
|
|
int i;
|
|
|
|
i = Qptr;
|
|
do {
|
|
printf("%d: si_csr=%04x csr=%02x bus_csr=%02x addr=%08x count=%08x fifo=%08x\n",
|
|
Qents[i].seq, Qents[i].si_csr, Qents[i].sci_csr, Qents[i].sci_bus_csr,
|
|
Qents[i].dma_addr, Qents[i].dma_count, Qents[i].fifo_len);
|
|
printf(" from addr=%08x count=%08x fifo=%08x\n",
|
|
Qents[i].start_addr, Qents[i].start_count, Qents[i].start_len);
|
|
i++;
|
|
if (i == NQENT) i = 0;
|
|
} while (i != Qptr);
|
|
}
|
|
|
|
#endif
|