/* $NetBSD: mgnsc.c,v 1.48 2021/08/07 16:18:41 thorpej Exp $ */ /* * 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. 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 */ /* * Copyright (c) 1994 Michael L. Hitch * * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 __KERNEL_RCSID(0, "$NetBSD: mgnsc.c,v 1.48 2021/08/07 16:18:41 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include void mgnscattach(device_t, device_t, void *); int mgnscmatch(device_t, cfdata_t, void *); int mgnsc_dmaintr(void *); #ifdef DEBUG void mgnsc_dump(void); #endif #ifdef DEBUG #endif CFATTACH_DECL_NEW(mgnsc, sizeof(struct siop_softc), mgnscmatch, mgnscattach, NULL, NULL); /* * if we are a CSA Magnum 40 SCSI */ int mgnscmatch(device_t parent, cfdata_t cf, void *aux) { struct zbus_args *zap; zap = aux; if (zap->manid == 1058 && zap->prodid == 17) return(1); return(0); } void mgnscattach(device_t parent, device_t self, void *aux) { struct siop_softc *sc = device_private(self); struct zbus_args *zap; siop_regmap_p rp; struct scsipi_adapter *adapt = &sc->sc_adapter; struct scsipi_channel *chan = &sc->sc_channel; sc->sc_dev = self; printf("\n"); zap = aux; sc->sc_siopp = rp = (siop_regmap_p)((char *)zap->va + 0x8000); /* * CTEST7 = TT1 */ sc->sc_clock_freq = 33; /* Clock = 33 MHz */ sc->sc_ctest7 = SIOP_CTEST7_TT1; sc->sc_dcntl = 0x00; sc->sc_siop_si = softint_establish(SOFTINT_BIO, (void (*)(void *))siopintr, sc); /* * Fill in the scsipi_adapter. */ memset(adapt, 0, sizeof(*adapt)); adapt->adapt_dev = self; adapt->adapt_nchannels = 1; adapt->adapt_openings = 7; adapt->adapt_max_periph = 1; adapt->adapt_request = siop_scsipi_request; adapt->adapt_minphys = siop_minphys; /* * Fill in the scsipi_channel. */ memset(chan, 0, sizeof(*chan)); chan->chan_adapter = adapt; chan->chan_bustype = &scsi_bustype; chan->chan_channel = 0; chan->chan_ntargets = 8; chan->chan_nluns = 8; chan->chan_id = 7; siopinitialize(sc); sc->sc_isr.isr_intr = mgnsc_dmaintr; sc->sc_isr.isr_arg = sc; sc->sc_isr.isr_ipl = 6; add_isr (&sc->sc_isr); /* * attach all scsi units on us */ config_found(self, chan, scsiprint, CFARGS_NONE); } /* * Level 6 interrupt processing for the Magnum/40 SCSI. Because the * level 6 interrupt is above splbio, the interrupt status is saved * and a softint scheduled. This way, the actual processing of the * interrupt can be deferred until splbio is unblocked. */ int mgnsc_dmaintr(void *arg) { struct siop_softc *sc = arg; siop_regmap_p rp; u_char istat; if (sc->sc_flags & SIOP_INTSOFF) return (0); /* interrupts are not active */ rp = sc->sc_siopp; istat = rp->siop_istat; if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) return (0); /* * save interrupt status, DMA status, and SCSI status 0 * (may need to deal with stacked interrupts?) */ sc->sc_sstat0 = rp->siop_sstat0; sc->sc_istat = istat; sc->sc_dstat = rp->siop_dstat; /* * disable interrupts until the callback can process this * interrupt. */ rp->siop_sien = 0; rp->siop_dien = 0; sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; softint_schedule(sc->sc_siop_si); return (1); } #ifdef DEBUG void mgnsc_dump(void) { extern struct cfdriver mgnsc_cd; struct siop_softc *sc; int i; for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) { sc = device_lookup_private(&mgnsc_cd, i); if (sc != NULL) siop_dump(sc); } } #endif