sys/arch/vax/vsa/tc_vsbus.c

   1 /*      $NetBSD: tc_vsbus.c,v 1.3 2008/03/15 00:21:48 matt Exp $        */
   2 /*-
   3  * Copyright (c) 2008 The NetBSD Foundation, Inc.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software contributed to The NetBSD Foundation
   7  * by Matt Thomas <matt@3am-software.com>.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include <sys/param.h>
  32 #include <sys/device.h>
  33
  34 #include <machine/bus.h>
  35 #include <machine/cpu.h>
  36 #include <machine/pte.h>
  37 #include <machine/scb.h>
  38 #include <machine/vsbus.h>
  39 #include <dev/tc/tcvar.h>
  40
  41 static int tcbus_match(device_t, cfdata_t, void *);
  42 static void tcbus_attach(device_t, device_t, void *);
  43
  44 struct tcbus_softc {
  45         struct tc_softc sc_tc;
  46         struct tc_slotdesc sc_slots[1];
  47         struct vax_bus_dma_tag sc_dmatag;
  48         struct vax_sgmap sc_sgmap;
  49         struct evcnt sc_ev;
  50         bus_space_handle_t sc_memh;
  51 };
  52
  53 static bus_dma_tag_t tcbus_dmat;
  54
  55 CFATTACH_DECL(tcbus, sizeof(struct tcbus_softc),
  56     tcbus_match, tcbus_attach, 0, 0);
  57
  58 static bus_dma_tag_t
  59 tcbus_get_dma_tag(int slotno)
  60 {
  61         return tcbus_dmat;
  62 }
  63
  64 static void
  65 tcbus_intr_establish(device_t dv, void *cookie, int level,
  66         int (*func)(void *), void *arg)
  67 {
  68         struct tcbus_softc * const sc = cookie;
  69
  70         scb_vecalloc(0x51, (void (*)(void *)) func, arg, SCB_ISTACK,
  71             &sc->sc_ev);
  72 }
  73
  74 static void
  75 tcbus_intr_disestablish(device_t dv, void *cookie)
  76 {
  77 }
  78
  79 static const struct evcnt *
  80 tcbus_intr_evcnt(device_t dv, void *cookie)
  81 {
  82         return NULL;
  83 }
  84
  85 int
  86 tcbus_match(device_t parent, cfdata_t cfdata, void *aux)
  87 {
  88         return 0;
  89 }
  90
  91 #define KA4x_TURBO      0x30000000
  92 #define KA4x_TURBOMAPS  0x35800000
  93 #define KA4x_TURBOCSR   0x36800000
  94
  95 void
  96 tcbus_attach(device_t parent, device_t self, void *aux)
  97 {
  98         struct vsbus_attach_args * const va = aux;
  99         struct tcbus_softc * const sc = device_private(self);
 100         struct tcbus_attach_args tba;
 101         struct pte *pte;
 102         const size_t nentries = 32768;
 103         int error;
 104         int i;
 105
 106         error = bus_space_map(va->va_memt, KA4x_TURBO, 0x10000,
 107             BUS_SPACE_MAP_LINEAR, &sc->sc_memh);
 108         if (error) {
 109                 aprint_error(": failed to map TC slot 0: %d\n", error);
 110                 return;
 111         }
 112
 113         sc->sc_slots[0].tcs_addr = sc->sc_memh;
 114         sc->sc_slots[0].tcs_cookie = sc;
 115
 116         tba.tba_speed = TC_SPEED_12_5_MHZ;
 117         tba.tba_slots = sc->sc_slots;
 118         tba.tba_nslots = 1;
 119         tba.tba_intr_evcnt = tcbus_intr_evcnt;
 120         tba.tba_intr_establish = tcbus_intr_establish;
 121         tba.tba_intr_disestablish = tcbus_intr_disestablish;
 122         tba.tba_get_dma_tag = tcbus_get_dma_tag;
 123
 124         vax_sgmap_dmatag_init(&sc->sc_dmatag, sc, nentries);
 125         pte = (struct pte *) vax_map_physmem(KA4x_TURBOMAPS,
 126             nentries * sizeof(pte[0]));
 127
 128         for (i = nentries; i > 0; )
 129                 ((uint32_t *) pte)[--i] = 0;
 130
 131         sc->sc_dmatag._sgmap = &sc->sc_sgmap;
 132         /*
 133          * Initialize the SGMAP.
 134          */
 135         vax_sgmap_init(&sc->sc_dmatag, &sc->sc_sgmap, "tc_sgmap",
 136              sc->sc_dmatag._wbase, sc->sc_dmatag._wsize, pte, 0);
 137
 138         aprint_normal("\n");
 139
 140         aprint_verbose_dev(self, "32K entry DMA SGMAP at PA 0x%x (VA %p)\n",
 141              KA4x_TURBOMAPS, pte);
 142
 143         tcbus_dmat = &sc->sc_dmatag;
 144
 145         tcattach(parent, self, &tba);
 146 }