417 lines
9.8 KiB
C
417 lines
9.8 KiB
C
/* $NetBSD: bztzsc.c,v 1.3 1997/01/21 05:44:42 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Ignatios Souvatzis
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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 contains software written by Ignatios Souvatzis for
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* the NetBSD project.
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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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*/
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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 <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_page.h>
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#include <machine/pmap.h>
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#include <amiga/amiga/custom.h>
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#include <amiga/amiga/cc.h>
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#include <amiga/amiga/device.h>
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#include <amiga/amiga/isr.h>
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#include <amiga/dev/sfasreg.h>
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#include <amiga/dev/sfasvar.h>
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#include <amiga/dev/zbusvar.h>
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#include <amiga/dev/bztzscreg.h>
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#include <amiga/dev/bztzscvar.h>
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void bztzscattach __P((struct device *, struct device *, void *));
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int bztzscmatch __P((struct device *, struct cfdata *, void *));
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struct scsi_adapter bztzsc_scsiswitch = {
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sfas_scsicmd,
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sfas_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 scsi_device bztzsc_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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struct cfattach bztzsc_ca = {
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sizeof(struct bztzsc_softc), bztzscmatch, bztzscattach
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};
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struct cfdriver bztzsc_cd = {
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NULL, "bztzsc", DV_DULL, NULL, 0
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};
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int bztzsc_intr __P((void *));
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void bztzsc_set_dma_tc __P((struct sfas_softc *sc, unsigned int len));
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int bztzsc_setup_dma __P((struct sfas_softc *sc, vm_offset_t ptr, int len,
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int mode));
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int bztzsc_build_dma_chain __P((struct sfas_softc *sc,
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struct sfas_dma_chain *chain, void *p, int l));
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int bztzsc_need_bump __P((struct sfas_softc *sc, vm_offset_t ptr, int len));
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void bztzsc_led __P((struct sfas_softc *sc, int mode));
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/*
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* If we are an Phase 5 Devices Blizzard-2060 SCSI option:
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*/
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int
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bztzscmatch(pdp, cfp, auxp)
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struct device *pdp;
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struct cfdata *cfp;
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void *auxp;
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{
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struct zbus_args *zap;
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volatile u_int8_t *ta;
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zap = auxp;
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if (zap->manid != 0x2140) /* Phase V ? */
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return(0);
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if (zap->prodid != 24) /* is it B2060? */
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return 0;
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ta = (vu_char *)(((char *)zap->va) + 0x1ff00 + 0x20);
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if (badbaddr((caddr_t)ta))
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return(0);
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*ta = 0;
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*ta = 1;
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DELAY(5);
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if (*ta != 1)
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return(0);
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return(1);
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}
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u_int32_t bztzsc_flags = 0;
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void
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bztzscattach(pdp, dp, auxp)
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struct device *pdp;
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struct device *dp;
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void *auxp;
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{
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struct bztzsc_softc *sc;
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struct zbus_args *zap;
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bztzsc_regmap_p rp;
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vu_char *fas;
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zap = auxp;
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fas = &((vu_char *)zap->va)[0x1ff00];
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sc = (struct bztzsc_softc *)dp;
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rp = &sc->sc_regmap;
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rp->FAS216.sfas_tc_low = &fas[0x00];
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rp->FAS216.sfas_tc_mid = &fas[0x04];
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rp->FAS216.sfas_fifo = &fas[0x08];
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rp->FAS216.sfas_command = &fas[0x0C];
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rp->FAS216.sfas_dest_id = &fas[0x10];
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rp->FAS216.sfas_timeout = &fas[0x14];
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rp->FAS216.sfas_syncper = &fas[0x18];
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rp->FAS216.sfas_syncoff = &fas[0x1C];
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rp->FAS216.sfas_config1 = &fas[0x20];
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rp->FAS216.sfas_clkconv = &fas[0x24];
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rp->FAS216.sfas_test = &fas[0x28];
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rp->FAS216.sfas_config2 = &fas[0x2C];
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rp->FAS216.sfas_config3 = &fas[0x30];
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rp->FAS216.sfas_tc_high = &fas[0x38];
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rp->FAS216.sfas_fifo_bot = &fas[0x3C];
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rp->hardbits = &fas[0xe0];
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rp->addrport = &fas[0xf0];
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sc->sc_softc.sc_fas = (sfas_regmap_p)rp;
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sc->sc_softc.sc_led = bztzsc_led;
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sc->sc_softc.sc_setup_dma = bztzsc_setup_dma;
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sc->sc_softc.sc_build_dma_chain = bztzsc_build_dma_chain;
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sc->sc_softc.sc_need_bump = bztzsc_need_bump;
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sc->sc_softc.sc_clock_freq = 40; /* Phase5 SCSI all run at 40MHz */
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sc->sc_softc.sc_timeout = 250; /* Set default timeout to 250ms */
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sc->sc_softc.sc_config_flags = bztzsc_flags; /* for the moment */
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sc->sc_softc.sc_host_id = 7; /* Should check the jumpers */
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sc->sc_softc.sc_bump_sz = NBPG; /* XXX should be the VM pagesize */
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sc->sc_softc.sc_bump_pa = 0x0;
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sfasinitialize((struct sfas_softc *)sc);
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sc->sc_softc.sc_link.adapter_softc = sc;
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sc->sc_softc.sc_link.adapter_target = sc->sc_softc.sc_host_id;
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sc->sc_softc.sc_link.adapter = &bztzsc_scsiswitch;
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sc->sc_softc.sc_link.device = &bztzsc_scsidev;
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sc->sc_softc.sc_link.openings = 1;
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sc->sc_softc.sc_link.max_target = 7;
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sc->sc_softc.sc_isr.isr_intr = bztzsc_intr;
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sc->sc_softc.sc_isr.isr_arg = &sc->sc_softc;
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sc->sc_softc.sc_isr.isr_ipl = 2;
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add_isr(&sc->sc_softc.sc_isr);
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/* We don't want interrupt until we're initialized! */
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printf("\n");
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/* attach all scsi units on us */
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config_found(dp, &sc->sc_softc.sc_link, scsiprint);
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}
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int
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bztzsc_intr(arg)
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void *arg;
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{
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struct sfas_softc *dev = arg;
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bztzsc_regmap_p rp;
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int quickints;
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rp = (bztzsc_regmap_p)dev->sc_fas;
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if (*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING) {
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quickints = 16;
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do {
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dev->sc_status = *rp->FAS216.sfas_status;
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dev->sc_interrupt = *rp->FAS216.sfas_interrupt;
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if (dev->sc_interrupt & SFAS_INT_RESELECTED) {
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dev->sc_resel[0] = *rp->FAS216.sfas_fifo;
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dev->sc_resel[1] = *rp->FAS216.sfas_fifo;
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}
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sfasintr(dev);
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} while((*rp->FAS216.sfas_status & SFAS_STAT_INTERRUPT_PENDING)
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&& --quickints);
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return(1);
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}
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return(0);
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}
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/* Set DMA transfer counter */
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void
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bztzsc_set_dma_tc(sc, len)
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struct sfas_softc *sc;
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unsigned int len;
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{
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*sc->sc_fas->sfas_tc_low = len; len >>= 8;
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*sc->sc_fas->sfas_tc_mid = len; len >>= 8;
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*sc->sc_fas->sfas_tc_high = len;
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}
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/* Initialize DMA for transfer */
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int
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bztzsc_setup_dma(sc, ptr, len, mode)
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struct sfas_softc *sc;
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vm_offset_t ptr;
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int len;
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int mode;
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{
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int retval;
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u_int32_t d;
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bztzsc_regmap_p rp;
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retval = 0;
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switch(mode) {
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case SFAS_DMA_READ:
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case SFAS_DMA_WRITE:
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rp = (bztzsc_regmap_p)sc->sc_fas;
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d = (u_int32_t)ptr;
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d >>= 1;
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if (mode == SFAS_DMA_WRITE)
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d |= (1L << 31);
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rp->addrport[12] = (u_int8_t)d;
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__asm __volatile("nop");
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d >>= 8;
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rp->addrport[8] = (u_int8_t)d;
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__asm __volatile("nop");
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d >>= 8;
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rp->addrport[4] = (u_int8_t)d;
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__asm __volatile("nop");
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d >>= 8;
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rp->addrport[0] = (u_int8_t)d;
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__asm __volatile("nop");
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bztzsc_set_dma_tc(sc, len);
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break;
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case SFAS_DMA_CLEAR:
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default:
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retval = (*sc->sc_fas->sfas_tc_high << 16) |
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(*sc->sc_fas->sfas_tc_mid << 8) |
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*sc->sc_fas->sfas_tc_low;
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bztzsc_set_dma_tc(sc, 0);
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break;
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}
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return(retval);
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}
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/* Check if address and len is ok for DMA transfer */
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int
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bztzsc_need_bump(sc, ptr, len)
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struct sfas_softc *sc;
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vm_offset_t ptr;
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int len;
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{
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int p;
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p = (int)ptr & 0x03;
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if (p) {
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p = 4-p;
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if (len < 256)
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p = len;
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}
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return(p);
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}
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/* Interrupt driven routines */
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/* XXX some of this is voodoo might be remnants intended for the Fastlane. */
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int
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bztzsc_build_dma_chain(sc, chain, p, l)
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struct sfas_softc *sc;
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struct sfas_dma_chain *chain;
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void *p;
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int l;
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{
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vm_offset_t pa, lastpa;
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char *ptr;
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int len, prelen, max_t, n;
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if (l == 0)
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return(0);
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#define set_link(n, p, l, f)\
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do { chain[n].ptr = (p); chain[n].len = (l); chain[n++].flg = (f); } while(0)
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n = 0;
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if (l < 512)
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set_link(n, (vm_offset_t)p, l, SFAS_CHAIN_BUMP);
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else if ((p >= (void *)0xFF000000)
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#if defined(M68040) || defined(M68060)
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&& ((mmutype == MMU_68040) && (p >= (void *)0xFFFC0000))
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#endif
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) {
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while(l != 0) {
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len = ((l > sc->sc_bump_sz) ? sc->sc_bump_sz : l);
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set_link(n, (vm_offset_t)p, len, SFAS_CHAIN_BUMP);
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p += len;
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l -= len;
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}
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} else {
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ptr = p;
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len = l;
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pa = kvtop(ptr);
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prelen = ((int)ptr & 0x03);
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if (prelen) {
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prelen = 4-prelen;
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set_link(n, (vm_offset_t)ptr, prelen, SFAS_CHAIN_BUMP);
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ptr += prelen;
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len -= prelen;
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}
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lastpa = 0;
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while(len > 3) {
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pa = kvtop(ptr);
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max_t = NBPG - (pa & PGOFSET);
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if (max_t > len)
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max_t = len;
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max_t &= ~3;
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if (lastpa == pa)
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sc->sc_chain[n-1].len += max_t;
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else
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set_link(n, pa, max_t, SFAS_CHAIN_DMA);
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lastpa = pa+max_t;
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ptr += max_t;
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len -= max_t;
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}
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if (len)
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set_link(n, (vm_offset_t)ptr, len, SFAS_CHAIN_BUMP);
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}
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return(n);
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}
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/* real one for 2060 */
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void
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bztzsc_led(sc, mode)
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struct sfas_softc *sc;
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int mode;
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{
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bztzsc_regmap_p rp;
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rp = (bztzsc_regmap_p)sc->sc_fas;
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if (mode)
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*rp->hardbits = 0x00; /* Led on, Int on */
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else
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*rp->hardbits = 0x02; /* Led off, Int on */
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}
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