sys/arch/amiga/dev/mgnsc.c

   1 /*      $NetBSD: mgnsc.c,v 1.43 2008/06/13 08:13:37 cegger Exp $ */
   2
   3 /*
   4  * Copyright (c) 1982, 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)dma.c
  32  */
  33
  34 /*
  35  * Copyright (c) 1994 Michael L. Hitch
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  47  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  48  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  49  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  50  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  51  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  52  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  53  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  54  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  55  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  56  *
  57  *      @(#)dma.c
  58  */
  59
  60 #include <sys/cdefs.h>
  61 __KERNEL_RCSID(0, "$NetBSD: mgnsc.c,v 1.43 2008/06/13 08:13:37 cegger Exp $");
  62
  63 #include <sys/param.h>
  64 #include <sys/systm.h>
  65 #include <sys/kernel.h>
  66 #include <sys/device.h>
  67
  68 #include <uvm/uvm_extern.h>
  69
  70 #include <dev/scsipi/scsi_all.h>
  71 #include <dev/scsipi/scsipi_all.h>
  72 #include <dev/scsipi/scsiconf.h>
  73 #include <amiga/amiga/custom.h>
  74 #include <amiga/amiga/cc.h>
  75 #include <amiga/amiga/device.h>
  76 #include <amiga/amiga/isr.h>
  77 #include <amiga/dev/siopreg.h>
  78 #include <amiga/dev/siopvar.h>
  79 #include <amiga/dev/zbusvar.h>
  80
  81 void mgnscattach(struct device *, struct device *, void *);
  82 int mgnscmatch(struct device *, struct cfdata *, void *);
  83 int mgnsc_dmaintr(void *);
  84 #ifdef DEBUG
  85 void mgnsc_dump(void);
  86 #endif
  87
  88
  89 #ifdef DEBUG
  90 #endif
  91
  92 CFATTACH_DECL(mgnsc, sizeof(struct siop_softc),
  93     mgnscmatch, mgnscattach, NULL, NULL);
  94
  95 /*
  96  * if we are a CSA Magnum 40 SCSI
  97  */
  98 int
  99 mgnscmatch(struct device *pdp, struct cfdata *cfp, void *auxp)
 100 {
 101         struct zbus_args *zap;
 102
 103         zap = auxp;
 104         if (zap->manid == 1058 && zap->prodid == 17)
 105                 return(1);
 106         return(0);
 107 }
 108
 109 void
 110 mgnscattach(struct device *pdp, struct device *dp, void *auxp)
 111 {
 112         struct siop_softc *sc = (struct siop_softc *)dp;
 113         struct zbus_args *zap;
 114         siop_regmap_p rp;
 115         struct scsipi_adapter *adapt = &sc->sc_adapter;
 116         struct scsipi_channel *chan = &sc->sc_channel;
 117
 118         printf("\n");
 119         zap = auxp;
 120
 121         sc->sc_siopp = rp = (siop_regmap_p)((char *)zap->va + 0x8000);
 122
 123         /*
 124          * CTEST7 = TT1
 125          */
 126         sc->sc_clock_freq = 33;         /* Clock = 33 MHz */
 127         sc->sc_ctest7 = SIOP_CTEST7_TT1;
 128         sc->sc_dcntl = 0x00;
 129
 130         sc->sc_siop_si = softint_establish(SOFTINT_BIO,
 131             (void (*)(void *))siopintr, sc);
 132
 133         /*
 134          * Fill in the scsipi_adapter.
 135          */
 136         memset(adapt, 0, sizeof(*adapt));
 137         adapt->adapt_dev = &sc->sc_dev;
 138         adapt->adapt_nchannels = 1;
 139         adapt->adapt_openings = 7;
 140         adapt->adapt_max_periph = 1;
 141         adapt->adapt_request = siop_scsipi_request;
 142         adapt->adapt_minphys = siop_minphys;
 143
 144         /*
 145          * Fill in the scsipi_channel.
 146          */
 147         memset(chan, 0, sizeof(*chan));
 148         chan->chan_adapter = adapt;
 149         chan->chan_bustype = &scsi_bustype;
 150         chan->chan_channel = 0;
 151         chan->chan_ntargets = 8;
 152         chan->chan_nluns = 8;
 153         chan->chan_id = 7;
 154
 155         siopinitialize(sc);
 156
 157         sc->sc_isr.isr_intr = mgnsc_dmaintr;
 158         sc->sc_isr.isr_arg = sc;
 159         sc->sc_isr.isr_ipl = 6;
 160         add_isr (&sc->sc_isr);
 161
 162         /*
 163          * attach all scsi units on us
 164          */
 165         config_found(dp, chan, scsiprint);
 166 }
 167
 168 /*
 169  * Level 6 interrupt processing for the Magnum/40 SCSI. Because the
 170  * level 6 interrupt is above splbio, the interrupt status is saved
 171  * and a softint scheduled.  This way, the actual processing of the
 172  * interrupt can be deferred until splbio is unblocked.
 173  */
 174
 175 int
 176 mgnsc_dmaintr(void *arg)
 177 {
 178         struct siop_softc *sc = arg;
 179         siop_regmap_p rp;
 180         u_char istat;
 181
 182         if (sc->sc_flags & SIOP_INTSOFF)
 183                 return (0);     /* interrupts are not active */
 184         rp = sc->sc_siopp;
 185         istat = rp->siop_istat;
 186         if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
 187                 return (0);
 188         /*
 189          * save interrupt status, DMA status, and SCSI status 0
 190          * (may need to deal with stacked interrupts?)
 191          */
 192         sc->sc_sstat0 = rp->siop_sstat0;
 193         sc->sc_istat = istat;
 194         sc->sc_dstat = rp->siop_dstat;
 195         /*
 196          * disable interrupts until the callback can process this
 197          * interrupt.
 198          */
 199         rp->siop_sien = 0;
 200         rp->siop_dien = 0;
 201         sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF;
 202         softint_schedule(sc->sc_siop_si);
 203         return (1);
 204 }
 205
 206 #ifdef DEBUG
 207 void
 208 mgnsc_dump(void)
 209 {
 210         extern struct cfdriver mgnsc_cd;
 211         struct siop_softc *sc;
 212         int i;
 213
 214         for (i = 0; i < mgnsc_cd.cd_ndevs; ++i) {
 215                 sc = device_lookup_private(&mgnsc_cd, i);
 216                 if (sc != NULL)
 217                         siop_dump(sc);
 218         }
 219 }
 220 #endif