/* $NetBSD: drsc.c,v 1.33 2014/03/22 01:52:44 christos Exp $ */ /* * Copyright (c) 1996 Ignatios Souvatzis * 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: drsc.c,v 1.33 2014/03/22 01:52:44 christos Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* is_xxx(), */ void drscattach(device_t, device_t, void *); int drscmatch(device_t, cfdata_t, void *); int drsc_dmaintr(struct siop_softc *); #ifdef DEBUG void drsc_dump(void); #endif #ifdef DEBUG #endif CFATTACH_DECL_NEW(drsc, sizeof(struct siop_softc), drscmatch, drscattach, NULL, NULL); static struct siop_softc *drsc_softc; /* * One of us is on every DraCo motherboard, */ int drscmatch(device_t parent, cfdata_t cf, void *aux) { static int drsc_matched = 0; /* Allow only one instance. */ if (!is_draco() || !matchname(aux, "drsc") || drsc_matched) return (0); drsc_matched = 1; return(1); } void drscattach(device_t parent, device_t self, void *aux) { struct siop_softc *sc = device_private(self); siop_regmap_p rp; struct scsipi_adapter *adapt = &sc->sc_adapter; struct scsipi_channel *chan = &sc->sc_channel; printf("\n"); sc->sc_dev = self; sc->sc_siopp = rp = (siop_regmap_p)(DRCCADDR+PAGE_SIZE*DRSCSIPG); /* * CTEST7 = TT1 */ sc->sc_clock_freq = 50; /* Clock = 50MHz */ sc->sc_ctest7 = 0x02; 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); #if 0 sc->sc_isr.isr_intr = drsc_dmaintr; sc->sc_isr.isr_arg = sc; sc->sc_isr.isr_ipl = 4; add_isr(&sc->sc_isr); #else drsc_softc = sc; single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); single_inst_bset_b(*draco_intena, DRIRQ_SCSI); #endif /* * attach all scsi units on us */ config_found(self, chan, scsiprint); } /* * Level 4 interrupt processing for the MacroSystem DraCo mainboard * SCSI. Because the level 4 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. */ void drsc_handler(void) { struct siop_softc *sc = drsc_softc; siop_regmap_p rp; int istat; if (sc->sc_flags & SIOP_INTSOFF) return; /* interrupts are not active */ rp = sc->sc_siopp; istat = rp->siop_istat; if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) return; /* * 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. */ #ifdef DRSC_NOCALLBACK (void)spl1(); siopintr(sc); #else rp->siop_sien = 0; rp->siop_dien = 0; sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF; single_inst_bclr_b(*draco_intpen, DRIRQ_SCSI); #ifdef DEBUG if (*draco_intpen & DRIRQ_SCSI) printf("%s: intpen still 0x%x\n", device_xname(sc->sc_dev), *draco_intpen); #endif softint_schedule(sc->sc_siop_si); #endif return; } #ifdef DEBUG void drsc_dump(void) { extern struct cfdriver drsc_cd; struct siop_softc *sc; int i; for (i = 0; i < drsc_cd.cd_ndevs; ++i) { sc = device_lookup_private(&drsc_cd, i); if (sc != NULL) siop_dump(sc); } } #endif