sys/arch/amiga/dev/zssc.c

   1 /*      $NetBSD: zssc.c,v 1.42 2009/05/19 18:39:26 phx 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: zssc.c,v 1.42 2009/05/19 18:39:26 phx 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 zsscattach(struct device *, struct device *, void *);
  82 int  zsscmatch(struct device *, struct cfdata *, void *);
  83 int  zssc_dmaintr(void *);
  84 #ifdef DEBUG
  85 void zssc_dump(void);
  86 #endif
  87
  88 CFATTACH_DECL(zssc, sizeof(struct siop_softc),
  89     zsscmatch, zsscattach, NULL, NULL);
  90
  91 /*
  92  * if we are an PPI Zeus
  93  */
  94 int
  95 zsscmatch(struct device *pdp, struct cfdata *cfp, void *auxp)
  96 {
  97         struct zbus_args *zap;
  98
  99         zap = auxp;
 100         if (zap->manid == 2026 && zap->prodid == 150)
 101                 return(1);
 102         return(0);
 103 }
 104
 105 void
 106 zsscattach(struct device *pdp, struct device *dp, void *auxp)
 107 {
 108         struct siop_softc *sc;
 109         struct zbus_args *zap;
 110         siop_regmap_p rp;
 111
 112         printf("\n");
 113
 114         zap = auxp;
 115
 116         sc = (struct siop_softc *)dp;
 117         sc->sc_siopp = rp = (siop_regmap_p)((char *)zap->va + 0x4000);
 118
 119         /*
 120          * CTEST7 = 00
 121          */
 122         sc->sc_clock_freq = 66;         /* Clock = 66 MHz */
 123         sc->sc_ctest7 = 0x00;
 124         sc->sc_dcntl = 0x00;
 125
 126         sc->sc_siop_si = softint_establish(SOFTINT_BIO,
 127             (void (*)(void *))siopintr, sc);
 128
 129         sc->sc_adapter.adapt_dev = &sc->sc_dev;
 130         sc->sc_adapter.adapt_nchannels = 1;
 131         sc->sc_adapter.adapt_openings = 7;
 132         sc->sc_adapter.adapt_max_periph = 1;
 133         sc->sc_adapter.adapt_ioctl = NULL;
 134         sc->sc_adapter.adapt_minphys = siop_minphys;
 135         sc->sc_adapter.adapt_request = siop_scsipi_request;
 136
 137         sc->sc_channel.chan_adapter = &sc->sc_adapter;
 138         sc->sc_channel.chan_bustype = &scsi_bustype;
 139         sc->sc_channel.chan_channel = 0;
 140         sc->sc_channel.chan_ntargets = 8;
 141         sc->sc_channel.chan_nluns = 8;
 142         sc->sc_channel.chan_id = 7;
 143
 144         siopinitialize(sc);
 145
 146         sc->sc_isr.isr_intr = zssc_dmaintr;
 147         sc->sc_isr.isr_arg = sc;
 148         sc->sc_isr.isr_ipl = 6;
 149         add_isr(&sc->sc_isr);
 150
 151         /*
 152          * attach all scsi units on us
 153          */
 154         config_found(dp, &sc->sc_channel, scsiprint);
 155 }
 156
 157 /*
 158  * Level 6 interrupt processing for the Progressive Peripherals Inc
 159  * Zeus SCSI.  Because the level 6 interrupt is above splbio, the
 160  * interrupt status is saved and a softint scheduled.  This way,
 161  * the actual processing of the interrupt can be deferred until
 162  * splbio is unblocked.
 163  */
 164
 165 int
 166 zssc_dmaintr(void *arg)
 167 {
 168         struct siop_softc *sc = arg;
 169         siop_regmap_p rp;
 170         int istat;
 171
 172         if (sc->sc_flags & SIOP_INTSOFF)
 173                 return (0);     /* interrupts are not active */
 174         rp = sc->sc_siopp;
 175         istat = rp->siop_istat;
 176         if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
 177                 return(0);
 178         /*
 179          * save interrupt status, DMA status, and SCSI status 0
 180          * (may need to deal with stacked interrupts?)
 181          */
 182         sc->sc_sstat0 = rp->siop_sstat0;
 183         sc->sc_istat = istat;
 184         sc->sc_dstat = rp->siop_dstat;
 185         /*
 186          * disable interrupts until the callback can process this
 187          * interrupt.
 188          */
 189         rp->siop_sien = 0;
 190         rp->siop_dien = 0;
 191         sc->sc_flags |= SIOP_INTDEFER | SIOP_INTSOFF;
 192         softint_schedule(sc->sc_siop_si);
 193         return(1);
 194 }
 195
 196 #ifdef DEBUG
 197 void
 198 zssc_dump(void)
 199 {
 200         extern struct cfdriver zssc_cd;
 201         struct siop_softc *sc;
 202         int i;
 203
 204         for (i = 0; i < zssc_cd.cd_ndevs; ++i) {
 205                 sc = device_lookup_private(&zssc_cd, i);
 206                 if (sc != NULL)
 207                         siop_dump(sc);
 208         }
 209 }
 210 #endif