sys/arch/sun3/sun3x/vme.c

   1 /*      $NetBSD: vme.c,v 1.14 2008/04/28 20:23:38 martin Exp $  */
   2
   3 /*-
   4  * Copyright (c) 1996 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Gordon W. Ross.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: vme.c,v 1.14 2008/04/28 20:23:38 martin Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/device.h>
  38
  39 #include <uvm/uvm_extern.h>
  40
  41 #define _SUN68K_BUS_DMA_PRIVATE
  42 #include <machine/autoconf.h>
  43 #include <machine/bus.h>
  44 #include <machine/dvma.h>
  45 #include <machine/pmap.h>
  46
  47 #include <sun3/sun3x/vme.h>
  48
  49 /* Does this machine have a VME bus? */
  50 extern int cpu_has_vme;
  51
  52 /*
  53  * Convert vme unit number to bus type,
  54  * but only for supported bus types.
  55  * (See autoconf.h and vme.h)
  56  */
  57 #define VME_UNITS       6
  58 static const struct {
  59         int bustype;
  60         const char *name;
  61         int pmtype;
  62         vaddr_t base;
  63         vaddr_t mask;
  64 } vme_info[VME_UNITS] = {
  65         { BUS_VME16D16, "A16/D16", PMAP_VME16, VME16_BASE, VME16_MASK },
  66         { BUS_VME16D32, "A16/D32", PMAP_VME32, VME16_BASE, VME16_MASK },
  67         { BUS_VME24D16, "A24/D16", PMAP_VME16, VME24_BASE, VME24_MASK },
  68         { BUS_VME24D32, "A24/D32", PMAP_VME32, VME24_BASE, VME24_MASK },
  69         { BUS_VME32D16, "A32/D16", PMAP_VME16, VME32_BASE, VME32_MASK },
  70         { BUS_VME32D32, "A32/D32", PMAP_VME32, VME32_BASE, VME32_MASK },
  71 };
  72
  73 static int  vme_match(struct device *, struct cfdata *, void *);
  74 static void vme_attach(struct device *, struct device *, void *);
  75
  76 struct vme_softc {
  77         device_t        sc_dev;
  78         bus_space_tag_t sc_bustag;
  79         bus_dma_tag_t   sc_dmatag;
  80         int             sc_bustype;
  81 };
  82
  83 CFATTACH_DECL_NEW(vme, sizeof(struct vme_softc),
  84     vme_match, vme_attach, NULL, NULL);
  85
  86 static int vme_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t,
  87     int, vaddr_t, bus_space_handle_t *);
  88 static paddr_t vme_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t,
  89     off_t, int, int);
  90 static int vme_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t,
  91     struct proc *, int);
  92
  93 static struct sun68k_bus_space_tag vme_space_tag = {
  94         NULL,                           /* cookie */
  95         NULL,                           /* parent bus space tag */
  96         vme_bus_map,                    /* bus_space_map */
  97         NULL,                           /* bus_space_unmap */
  98         NULL,                           /* bus_space_subregion */
  99         NULL,                           /* bus_space_barrier */
 100         vme_bus_mmap,                   /* bus_space_mmap */
 101         NULL,                           /* bus_intr_establish */
 102         NULL,                           /* bus_space_peek_N */
 103         NULL                            /* bus_space_poke_N */
 104 };
 105
 106 static struct sun68k_bus_dma_tag vme_dma_tag;
 107
 108 static int
 109 vme_match(device_t parent, cfdata_t cf, void *aux)
 110 {
 111         struct confargs *ca = aux;
 112         int unit;
 113
 114         if (cpu_has_vme == 0)
 115                 return 0;
 116
 117         unit = cf->cf_unit;
 118         if (unit >= VME_UNITS)
 119                 return 0;
 120
 121         if (ca->ca_bustype != vme_info[unit].bustype)
 122                 return 0;
 123
 124         return 1;
 125 }
 126
 127 static void
 128 vme_attach(device_t parent, device_t self, void *args)
 129 {
 130         struct confargs *ca = aux;
 131         struct vme_softc *sc = device_private(self);
 132         struct confargs vmea;
 133         int unit;
 134
 135         sc->sc_dev = self;
 136
 137         unit = device_unit(self);
 138         aprint_normal(": (%s)\n", vme_info[unit].name);
 139
 140         sc->sc_bustag = ca->ca_bustag;
 141         sc->sc_dmatag = ca->ca_dmatag;
 142         sc->sc_bustype = unit;
 143
 144         vme_space_tag.cookie = sc;
 145         vme_space_tag.parent = sc->sc_bustag;
 146
 147         vme_dma_tag = *sc->sc_dmatag;
 148         vme_dma_tag._cookie = sc;
 149         vme_dma_tag._dmamap_load = vme_dmamap_load;
 150
 151         vmea = *ca;
 152         vmea.ca_bustag = &vme_space_tag;
 153         vmea.ca_dmatag = &vme_dma_tag;
 154
 155         /* We know ca_bustype == BUS_VMExx */
 156         config_search_ia(bus_scan, self, "vme", args);
 157 }
 158
 159 int
 160 vme_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr,
 161     bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp)
 162 {
 163         struct vme_softc *sc = t->cookie;
 164         paddr_t pa;
 165         int bustype, pmtype;
 166
 167         bustype = sc->sc_bustype;
 168         pa = paddr;
 169         pa &= vme_info[bustype].mask;
 170         pa |= vme_info[bustype].base;
 171         pmtype = vme_info[bustype].pmtype;
 172
 173         return bus_space_map2(sc->sc_bustag, pmtype, pa, size,
 174             flags | _SUN68K_BUS_MAP_USE_PROM, vaddr, hp);
 175 }
 176
 177 paddr_t
 178 vme_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off,
 179     int prot, int flags)
 180 {
 181         struct vme_softc *sc = t->cookie;
 182         paddr_t pa;
 183         int bustype, pmtype;
 184
 185         bustype = sc->sc_bustype;
 186         pa = paddr;
 187         pa &= vme_info[bustype].mask;
 188         pa |= vme_info[bustype].base;
 189         pmtype = vme_info[bustype].pmtype;
 190
 191         return bus_space_mmap2(sc->sc_bustag, pmtype, pa, off, prot, flags);
 192 }
 193
 194 static int
 195 vme_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
 196     bus_size_t buflen, struct proc *p, int flags)
 197 {
 198         int error;
 199
 200         error = _bus_dmamap_load(t, map, buf, buflen, p, flags);
 201         if (error == 0)
 202                 map->dm_segs[0].ds_addr &= DVMA_VME_SLAVE_MASK;
 203         return error;
 204 }