/* $OpenBSD: siopdma.c,v 1.7 2000/01/06 03:21:42 smurph Exp $ */ /* * Copyright (c) 1995 Theo de Raadt * Copyright (c) 1994 Michael L. Hitch * Copyright (c) 1982, 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)dma.c */ #include #include #include #include #include #include #include #include #include #include "mc.h" #include "pcctwo.h" #if NMC > 0 #include #endif #if NPCCTWO > 0 #include #endif int afscmatch __P((struct device *, void *, void *)); void afscattach __P((struct device *, struct device *, void *)); int siopintr __P((struct siop_softc *)); int afsc_dmaintr __P((struct siop_softc *)); struct scsi_adapter afsc_scsiswitch = { siop_scsicmd, siop_minphys, 0, /* no lun support */ 0, /* no lun support */ }; struct scsi_device afsc_scsidev = { NULL, /* use default error handler */ NULL, /* do not have a start function */ NULL, /* have no async handler */ NULL, /* Use default done routine */ }; struct cfattach siop_ca = { sizeof(struct siop_softc), afscmatch, afscattach, }; struct cfdriver siop_cd = { NULL, "siop", DV_DULL, 0 }; int afscmatch(pdp, vcf, args) struct device *pdp; void *vcf, *args; { struct cfdata *cf = vcf; struct confargs *ca = args; return (!badvaddr(ca->ca_vaddr, 4)); } void afscattach(parent, self, auxp) struct device *parent, *self; void *auxp; { struct siop_softc *sc = (struct siop_softc *)self; struct confargs *ca = auxp; siop_regmap_p rp; int tmp; extern int cpuspeed; sc->sc_siopp = rp = ca->ca_vaddr; /* * siop uses sc_clock_freq to define the dcntl & ctest7 reg values * (was 0x0221, but i added SIOP_CTEST7_SC0 for snooping control) * XXX does the clock frequency change for the 33MHz processors? */ sc->sc_clock_freq = cpuspeed * 2; #ifdef MVME177 /* MVME177 siop clock documented as fixed 50Mhz in VME177A/HX */ if (cputyp == CPU_177) sc->sc_clock_freq = 50; #endif #ifdef MVME172 /* XXX this is a guess! Same as MVME177?*/ if (cputyp == CPU_172) sc->sc_clock_freq = 50; #endif sc->sc_dcntl = SIOP_DCNTL_EA; /*XXX*/ if (sc->sc_clock_freq <= 25) /*XXX*/ sc->sc_dcntl |= (2 << 6); /*XXX*/ else if (sc->sc_clock_freq <= 37) /*XXX*/ sc->sc_dcntl |= (1 << 6); /*XXX*/ else if (sc->sc_clock_freq <= 50) /*XXX*/ sc->sc_dcntl |= (0 << 6); /*XXX*/ else /*XXX*/ sc->sc_dcntl |= (3 << 6); #if defined(MVME172) || defined(MVME177) /* No Select timouts on MC68060 */ if (cputyp == CPU_172 || cputyp == CPU_172) sc->sc_ctest7 = SIOP_CTEST7_SNOOP | SIOP_CTEST7_TT1 | SIOP_CTEST7_STD; else #endif sc->sc_ctest7 = SIOP_CTEST7_SNOOP | SIOP_CTEST7_TT1; sc->sc_link.adapter_softc = sc; sc->sc_link.adapter_target = 7; /* XXXX should ask ROM */ sc->sc_link.adapter = &afsc_scsiswitch; sc->sc_link.device = &afsc_scsidev; sc->sc_link.openings = 1; sc->sc_ih.ih_fn = afsc_dmaintr; sc->sc_ih.ih_arg = sc; sc->sc_ih.ih_ipl = ca->ca_ipl; siopinitialize(sc); switch (ca->ca_bustype) { #if NMC > 0 case BUS_MC: { struct mcreg *mc = (struct mcreg *)ca->ca_master; mcintr_establish(MCV_NCR, &sc->sc_ih); mc->mc_ncrirq = ca->ca_ipl | MC_IRQ_IEN; break; } #endif #if NPCCTWO > 0 case BUS_PCCTWO: { struct pcctworeg *pcc2 = (struct pcctworeg *)ca->ca_master; pcctwointr_establish(PCC2V_NCR, &sc->sc_ih); pcc2->pcc2_ncrirq = ca->ca_ipl | PCC2_IRQ_IEN; break; } #endif } evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt); /* * attach all scsi units on us, watching for boot device * (see dk_establish). */ tmp = bootpart; if (ca->ca_paddr != bootaddr) bootpart = -1; /* invalid flag to dk_establish */ config_found(self, &sc->sc_link, scsiprint); bootpart = tmp; /* restore old value */ } int afsc_dmaintr(sc) struct siop_softc *sc; { siop_regmap_p rp; u_char istat; rp = sc->sc_siopp; istat = rp->siop_istat; if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) return (0); if ((rp->siop_sien | rp->siop_dien) == 0) return (0); /* no interrupts enabled */ /* * save interrupt status, DMA status, and SCSI status 0 * (may need to deal with stacked interrupts?) */ sc->sc_istat = istat; sc->sc_dstat = rp->siop_dstat; sc->sc_sstat0 = rp->siop_sstat0; siopintr(sc); sc->sc_intrcnt.ev_count++; return (1); } #ifdef DEBUG void afsc_dump() { int i; for (i = 0; i < afsccd.cd_ndevs; ++i) if (afsccd.cd_devs[i]) siop_dump(afsccd.cd_devs[i]); } #endif