512 lines
11 KiB
C
512 lines
11 KiB
C
/* $NetBSD: asc.c,v 1.19 1997/10/14 22:07:50 mark Exp $ */
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/*
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* Copyright (c) 1996 Mark Brinicombe
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* Copyright (c) 1982, 1990 The Regents of the University of California.
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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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from:ahsc.c
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*/
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/*
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* Driver for the Acorn SCSI card using the SBIC (WD3393) generic driver
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*
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* Thanks to Acorn for supplying programming information on this card.
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*/
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/*
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* Ok this driver is not wonderful yet. It only supports POLLING mode
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* The Acorn SCSI card (or any WD3393 based card) does not support
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* DMA so the DMA section of this driver and the sbic driver needs
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* to be rewritten.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsiconf.h>
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#include <machine/bootconfig.h>
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#include <machine/io.h>
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#include <machine/irqhandler.h>
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#include <machine/katelib.h>
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#include <arm32/podulebus/podulebus.h>
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#include <arm32/podulebus/sbicreg.h>
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#include <arm32/podulebus/sbicvar.h>
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#include <arm32/podulebus/ascreg.h>
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#include <arm32/podulebus/ascvar.h>
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#include <arm32/podulebus/podules.h>
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void ascattach __P((struct device *, struct device *, void *));
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int ascmatch __P((struct device *, struct cfdata *, void *));
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void asc_enintr __P((struct sbic_softc *));
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void asc_dmastop __P((struct sbic_softc *));
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int asc_dmanext __P((struct sbic_softc *));
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int asc_dmaintr __P((struct sbic_softc *));
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int asc_dmago __P((struct sbic_softc *, char *, int, int));
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int asc_scsicmd __P((struct scsipi_xfer *xs));
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int asc_intr __P((void *arg));
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void asc_minphys __P((struct buf *bp));
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struct scsipi_adapter asc_scsiswitch = {
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asc_scsicmd,
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asc_minphys,
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0, /* no lun support */
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0, /* no lun support */
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};
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struct scsipi_device asc_scsidev = {
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NULL, /* use default error handler */
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NULL, /* do not have a start functio */
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NULL, /* have no async handler */
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NULL, /* Use default done routine */
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};
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#ifdef DEBUG
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int asc_dmadebug = 0;
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#endif
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struct cfattach asc_ca = {
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sizeof(struct asc_softc), ascmatch, ascattach
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};
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struct cfdriver asc_cd = {
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NULL, "asc", DV_DULL, NULL, 0
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};
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u_long scsi_nosync;
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int shift_nosync;
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#if ASC_POLL > 0
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int asc_poll = 0;
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#endif
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int
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ascmatch(pdp, cf, auxp)
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struct device *pdp;
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struct cfdata *cf;
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void *auxp;
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{
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struct podule_attach_args *pa = (struct podule_attach_args *)auxp;
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/* Look for the card */
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if (matchpodule(pa, MANUFACTURER_ACORN, PODULE_ACORN_SCSI, -1) == 0)
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return(0);
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if (strncmp(pa->pa_podule->description, "MCS", 3) == 0)
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return(0);
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return(1);
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}
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void
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ascattach(pdp, dp, auxp)
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struct device *pdp, *dp;
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void *auxp;
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{
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/* volatile struct sdmac *rp;*/
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struct asc_softc *sc;
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struct sbic_softc *sbic;
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struct podule_attach_args *pa;
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sc = (struct asc_softc *)dp;
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pa = (struct podule_attach_args *)auxp;
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if (pa->pa_podule_number == -1)
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panic("Podule has disappeared !");
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sc->sc_podule_number = pa->pa_podule_number;
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sc->sc_podule = pa->pa_podule;
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podules[sc->sc_podule_number].attached = 1;
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sbic = &sc->sc_softc;
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sbic->sc_enintr = asc_enintr;
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sbic->sc_dmago = asc_dmago;
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sbic->sc_dmanext = asc_dmanext;
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sbic->sc_dmastop = asc_dmastop;
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sbic->sc_dmacmd = 0;
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/*
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* eveything is a valid dma address
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*/
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sbic->sc_dmamask = 0;
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sbic->sc_sbicp = (sbic_regmap_p) (sc->sc_podule->mod_base + ASC_SBIC);
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sbic->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143;
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sbic->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
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sbic->sc_link.adapter_softc = sbic;
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sbic->sc_link.scsipi_scsi.adapter_target = 7;
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sbic->sc_link.adapter = &asc_scsiswitch;
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sbic->sc_link.device = &asc_scsidev;
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sbic->sc_link.openings = 1; /* was 2 */
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sbic->sc_link.scsipi_scsi.max_target = 7;
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sbic->sc_link.type = BUS_SCSI;
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/* Provide an override for the host id */
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(void)get_bootconf_option(boot_args, "asc.hostid",
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BOOTOPT_TYPE_INT, &sbic->sc_link.scsipi_scsi.adapter_target);
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printf(" hostid=%d", sbic->sc_link.scsipi_scsi.adapter_target);
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#if ASC_POLL > 0
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if (boot_args) {
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char *ptr;
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ptr = strstr(boot_args, "ascpoll");
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if (ptr)
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asc_poll = 1;
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}
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if (asc_poll)
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printf(" polling");
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#endif
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printf("\n");
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sc->sc_pagereg = sc->sc_podule->fast_base + ASC_PAGEREG;
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sc->sc_intstat = sc->sc_podule->fast_base + ASC_INTSTATUS;
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/* Reset the card */
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WriteByte(sc->sc_pagereg, 0x80);
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DELAY(500000);
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WriteByte(sc->sc_pagereg, 0x00);
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DELAY(250000);
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sbicinit(sbic);
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/* If we are polling only then we don't need a interrupt handler */
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sc->sc_ih.ih_func = asc_intr;
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sc->sc_ih.ih_arg = sc;
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sc->sc_ih.ih_level = IPL_BIO;
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sc->sc_ih.ih_name = "scsi: asc";
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sc->sc_ih.ih_maskaddr = sc->sc_podule->irq_addr;
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sc->sc_ih.ih_maskbits = sc->sc_podule->irq_mask;
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#ifdef ASC_POLL
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if (!asc_poll)
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#endif
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if (irq_claim(sc->sc_podule->interrupt, &sc->sc_ih))
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panic("%s: Cannot claim podule IRQ\n", dp->dv_xname);
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/*
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* attach all scsi units on us
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*/
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config_found(dp, &sbic->sc_link, scsiprint);
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}
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void
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asc_enintr(sbicsc)
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struct sbic_softc *sbicsc;
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{
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struct asc_softc *sc = (struct asc_softc *)sbicsc;
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/* printf("asc_enintr\n");*/
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/*
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volatile struct sdmac *sdp;
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sdp = dev->sc_cregs;
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dev->sc_flags |= SBICF_INTR;
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sdp->CNTR = CNTR_PDMD | CNTR_INTEN;
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*/
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sbicsc->sc_flags |= SBICF_INTR;
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WriteByte(sc->sc_pagereg, 0x40);
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}
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int
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asc_dmago(dev, addr, count, flags)
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struct sbic_softc *dev;
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char *addr;
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int count, flags;
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{
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printf("asc_dmago(addr=%x, count=%d,flags=%d)\n", (u_int)addr, count, flags);
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printf("dmago: dc_addr=%x tcnt=%x\n", dev->sc_cur->dc_addr, dev->sc_tcnt);
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#ifdef DDB
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Debugger();
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#else
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panic("Hit a brick wall\n");
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#endif
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#if 0
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volatile struct sdmac *sdp;
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sdp = dev->sc_cregs;
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/*
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* Set up the command word based on flags
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*/
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dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN;
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if ((flags & DMAGO_READ) == 0)
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dev->sc_dmacmd |= CNTR_DDIR;
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#ifdef DEBUG
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if (ahsc_dmadebug & DDB_IO)
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printf("ahsc_dmago: cmd %x\n", dev->sc_dmacmd);
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#endif
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dev->sc_flags |= SBICF_INTR;
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sdp->CNTR = dev->sc_dmacmd;
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sdp->ACR = (u_int) dev->sc_cur->dc_addr;
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sdp->ST_DMA = 1;
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return(dev->sc_tcnt);
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#endif
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return(0);
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}
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void
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asc_dmastop(dev)
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struct sbic_softc *dev;
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{
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/* printf("asc_dmastop\n");*/
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#if 0
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volatile struct sdmac *sdp;
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int s;
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sdp = dev->sc_cregs;
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#ifdef DEBUG
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if (ahsc_dmadebug & DDB_FOLLOW)
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printf("ahsc_dmastop()\n");
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#endif
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if (dev->sc_dmacmd) {
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s = splbio();
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if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) {
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/*
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* only FLUSH if terminal count not enabled,
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* and reading from peripheral
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*/
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sdp->FLUSH = 1;
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while ((sdp->ISTR & ISTR_FE_FLG) == 0)
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;
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}
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/*
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* clear possible interrupt and stop dma
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*/
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sdp->CINT = 1;
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sdp->SP_DMA = 1;
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dev->sc_dmacmd = 0;
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splx(s);
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}
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#endif
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}
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int
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asc_dmaintr(dev)
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struct sbic_softc *dev;
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{
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panic("asc_dmaintr");
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#if 0
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volatile struct sdmac *sdp;
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int stat, found;
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sdp = dev->sc_cregs;
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stat = sdp->ISTR;
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if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0)
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return (0);
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#ifdef DEBUG
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if (ahsc_dmadebug & DDB_FOLLOW)
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printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat);
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#endif
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/*
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* both, SCSI and DMA interrupts arrive here. I chose
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* arbitrarily that DMA interrupts should have higher
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* precedence than SCSI interrupts.
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*/
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found = 0;
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if (stat & ISTR_E_INT) {
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++found;
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sdp->CINT = 1; /* clear possible interrupt */
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/*
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* check for SCSI ints in the same go and
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* eventually save an interrupt
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*/
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}
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if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS)
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found += sbicintr(dev);
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return(found);
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#endif
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return(0);
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}
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int
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asc_dmanext(dev)
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struct sbic_softc *dev;
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{
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printf("asc_dmanext\n");
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#ifdef DDB
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Debugger();
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#else
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panic("Hit a brick wall\n");
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#endif
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#if 0
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volatile struct sdmac *sdp;
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int i, stat;
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sdp = dev->sc_cregs;
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if (dev->sc_cur > dev->sc_last) {
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/* shouldn't happen !! */
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printf("ahsc_dmanext at end !!!\n");
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asc_dmastop(dev);
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return(0);
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}
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if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) {
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/*
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* only FLUSH if terminal count not enabled,
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* and reading from peripheral
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*/
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sdp->FLUSH = 1;
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while ((sdp->ISTR & ISTR_FE_FLG) == 0)
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;
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}
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/*
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* clear possible interrupt and stop dma
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*/
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sdp->CINT = 1; /* clear possible interrupt */
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sdp->SP_DMA = 1; /* stop dma */
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sdp->CNTR = dev->sc_dmacmd;
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sdp->ACR = (u_int)dev->sc_cur->dc_addr;
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sdp->ST_DMA = 1;
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dev->sc_tcnt = dev->sc_cur->dc_count << 1;
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return(dev->sc_tcnt);
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#endif
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return(0);
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}
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void
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asc_dump()
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{
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int i;
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for (i = 0; i < asc_cd.cd_ndevs; ++i)
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if (asc_cd.cd_devs[i])
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sbic_dump(asc_cd.cd_devs[i]);
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}
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int
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asc_scsicmd(xs)
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struct scsipi_xfer *xs;
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{
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/* struct scsipi_link *sc_link = xs->sc_link;*/
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/* ensure command is polling for the moment */
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#if ASC_POLL > 0
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if (asc_poll)
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xs->flags |= SCSI_POLL;
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#endif
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/* printf("id=%d lun=%dcmdlen=%d datalen=%d opcode=%02x flags=%08x status=%02x blk=%02x %02x\n",
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sc_link->scsipi_scsi.target, sc_link->scsipi_scsi.lun, xs->cmdlen, xs->datalen, xs->cmd->opcode,
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xs->flags, xs->status, xs->cmd->bytes[0], xs->cmd->bytes[1]);*/
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return(sbic_scsicmd(xs));
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}
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int
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asc_intr(arg)
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void *arg;
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{
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struct asc_softc *sc = arg;
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int intr;
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/* printf("ascintr:");*/
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intr = ReadByte(sc->sc_intstat);
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/* printf("%02x\n", intr);*/
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if (intr & IS_SBIC_IRQ)
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sbicintr((struct sbic_softc *)sc);
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return(0); /* Pass interrupt on down the chain */
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}
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int kvtop()
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{
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printf("kvtop\n");
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#ifdef DDB
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Debugger();
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#else
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panic("Hit a brick wall\n");
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#endif
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return(0);
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}
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void alloc_z2mem()
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{
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panic("allocz2mem");
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}
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void isztwomem()
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{
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panic("isz2mem");
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}
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void PREP_DMA_MEM()
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{
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panic("PREP_DMA_MEM");
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}
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/*
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* limit the transfer as required.
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*/
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void
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asc_minphys(bp)
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struct buf *bp;
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{
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#if 0
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/*
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* We must limit the DMA xfer size
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*/
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if (bp->b_bcount > MAX_DMA_LEN) {
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printf("asc: Reducing dma length\n");
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bp->b_bcount = MAX_DMA_LEN;
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}
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#endif
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minphys(bp);
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}
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