sys/arch/macppc/pci/u3.c

   1 /* $NetBSD: u3.c,v 1.1.28.3 2007/06/07 20:30:47 garbled Exp $ */
   2
   3 /*
   4  * Copyright 2006 Kyma Systems LLC.
   5  * All rights reserved.
   6  *
   7  * Written by Sanjay Lal <sanjayl@kymasys.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  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Kyma Systems LLC.
  21  * 4. The name of Kyma Systems LLC may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY KYMA SYSTEMS LLC ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL KYMA SYSTEMS LLC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <sys/cdefs.h>
  39
  40 #include <sys/param.h>
  41 #include <sys/device.h>
  42 #include <sys/systm.h>
  43
  44 #include <dev/pci/pcivar.h>
  45 #include <dev/ofw/openfirm.h>
  46 #include <dev/ofw/ofw_pci.h>
  47
  48 #include <machine/autoconf.h>
  49
  50 struct ibmcpc_softc
  51 {
  52         struct device sc_dev;
  53         struct genppc_pci_chipset sc_pc[8];
  54         struct powerpc_bus_space sc_iot;
  55         struct powerpc_bus_space sc_memt;
  56 };
  57
  58 static void ibmcpc_attach(struct device *, struct device *, void *);
  59 static int ibmcpc_match(struct device *, struct cfdata *, void *);
  60
  61 static pcireg_t ibmcpc_conf_read(void *, pcitag_t, int);
  62 static void ibmcpc_conf_write(void *, pcitag_t, int, pcireg_t);
  63
  64 CFATTACH_DECL(ibmcpc, sizeof(struct ibmcpc_softc),
  65               ibmcpc_match, ibmcpc_attach, NULL, NULL);
  66
  67 #define PCI_DEVFN(slot,func)    ((((slot) & 0x1f) << 3) | ((func) & 0x07))
  68
  69 static int
  70 ibmcpc_match(struct device *parent, struct cfdata *cf, void *aux)
  71 {
  72         struct confargs *ca = aux;
  73         char compat[32];
  74
  75         if (strcmp(ca->ca_name, "ht") != 0)
  76                 return 0;
  77
  78         memset(compat, 0, sizeof(compat));
  79         OF_getprop(ca->ca_node, "compatible", compat, sizeof(compat));
  80
  81         if (strcmp(compat, "u3-ht") != 0)
  82                 return 0;
  83
  84         return 1;
  85 }
  86
  87 static void
  88 ibmcpc_attach(struct device *parent, struct device *self, void *aux)
  89 {
  90         struct ibmcpc_softc *sc = (void *) self;
  91         pci_chipset_tag_t pc = sc->sc_pc;
  92         struct confargs *ca = aux;
  93         struct pcibus_attach_args pba;
  94         int node = ca->ca_node, child;
  95         uint32_t reg[6], busrange[2], i;
  96         void *pc_data;
  97         char name[32];
  98
  99         aprint_normal("\n");
 100
 101         /* u3 address */
 102         if (OF_getprop(node, "reg", reg, sizeof(reg)) < 24) {
 103                 return;
 104         }
 105         aprint_normal("Mapping in config space @ pa 0x%08x, size: 0x%08x\n",
 106             reg[1], reg[2]);
 107         pc_data = mapiodev(reg[1], reg[2]);
 108
 109         for (child = OF_child(OF_finddevice("/ht")), i = 1; child;
 110             child = OF_peer(child), i++) {
 111
 112                 memset(name, 0, sizeof(name));
 113
 114                 if (OF_getprop(child, "name", name, sizeof(name)) == -1)
 115                         continue;
 116
 117                 if (strcmp(name, "pci") != 0)
 118                         continue;
 119
 120                 if (OF_getprop(child, "bus-range", busrange, 8) < 8)
 121                         continue;
 122
 123                 sc->sc_iot.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN |
 124                     _BUS_SPACE_IO_TYPE;
 125                 sc->sc_iot.pbs_base = 0x00000000;
 126                 if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_IO, child,
 127                     &sc->sc_iot, "ibmcpc io") != 0)
 128                         panic("Can't init ibmcpc io tag");
 129
 130                 sc->sc_memt.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN |
 131                     _BUS_SPACE_MEM_TYPE;
 132                 sc->sc_memt.pbs_base = 0x00000000;
 133                 if (ofwoea_map_space(RANGE_TYPE_PCI, RANGE_MEM, child,
 134                     &sc->sc_memt, "ibmcpc mem") != 0)
 135                         panic("Can't init ibmcpc mem tag");
 136
 137                 macppc_pci_get_chipset_tag(pc);
 138                 pc->pc_node = child;
 139                 pc->pc_bus = busrange[0];
 140                 pc->pc_addr = 0x0;
 141                 pc->pc_data = pc_data;
 142                 pc->pc_conf_read = ibmcpc_conf_read;
 143                 pc->pc_conf_write = ibmcpc_conf_write;
 144                 pc->pc_memt = &sc->sc_memt;
 145                 pc->pc_iot = &sc->sc_iot;
 146
 147                 memset(&pba, 0, sizeof(pba));
 148                 pba.pba_memt = pc->pc_memt;
 149                 pba.pba_iot = pc->pc_iot;
 150                 pba.pba_dmat = &pci_bus_dma_tag;
 151                 pba.pba_dmat64 = NULL;
 152                 pba.pba_bridgetag = NULL;
 153                 pba.pba_pc = pc;
 154                 pba.pba_bus = pc->pc_bus;
 155                 pba.pba_flags = PCI_FLAGS_MEM_ENABLED | PCI_FLAGS_IO_ENABLED;
 156                 config_found_ia(self, "pcibus", &pba, pcibusprint);
 157
 158                 pc++;
 159         }
 160 }
 161
 162 static pcireg_t
 163 ibmcpc_conf_read(void *cookie, pcitag_t tag, int reg)
 164 {
 165         pci_chipset_tag_t pc = cookie;
 166         u_int32_t daddr = (u_int32_t) pc->pc_data;
 167         pcireg_t data;
 168         u_int32_t bus, dev, func, x, devfn;
 169
 170         pci_decompose_tag(pc, tag, &bus, &dev, &func);
 171
 172         devfn = PCI_DEVFN(dev, func);
 173
 174         if (bus == 0) {
 175
 176                 if (devfn == 0x0) {
 177
 178                         data = 0xffffffff;
 179                         goto done;
 180                 }
 181
 182                 x = daddr + ((devfn << 8) | reg);
 183         } else
 184                 x = daddr + ((devfn << 8) | reg) + (bus << 16) + 0x01000000UL;
 185
 186         data = in32rb(x);
 187
 188 done:
 189         return data;
 190 }
 191
 192 static void
 193 ibmcpc_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data)
 194 {
 195         pci_chipset_tag_t pc = cookie;
 196         int32_t *daddr = pc->pc_data;
 197         u_int32_t bus, dev, func;
 198         u_int32_t x, devfn;
 199
 200         pci_decompose_tag(pc, tag, &bus, &dev, &func);
 201
 202         devfn = PCI_DEVFN(dev, func);
 203
 204         if (bus == 0) {
 205
 206                 if (devfn == 0x0) {
 207                         goto done;
 208                 }
 209                 x = (u_int32_t) daddr + ((devfn << 8) | reg);
 210         } else
 211                 x = (u_int32_t) daddr + ((devfn << 8) | reg) + (bus << 16) +
 212                     0x01000000UL;
 213
 214         out32rb(x, data);
 215
 216 done:
 217         return;
 218 }