sys/arch/powerpc/pci/pcib.c

   1 /*      $NetBSD: pcib.c,v 1.4 2008/04/04 16:04:19 matt Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe.
   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: pcib.c,v 1.4 2008/04/04 16:04:19 matt Exp $");
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/device.h>
  39
  40 #include <machine/bus.h>
  41
  42 #include <dev/isa/isavar.h>
  43
  44 #include <dev/pci/pcivar.h>
  45 #include <dev/pci/pcireg.h>
  46
  47 #include <dev/pci/pcidevs.h>
  48
  49 #include "isa.h"
  50 #include "isadma.h"
  51
  52 int     pcibmatch(device_t, cfdata_t, void *);
  53 void    pcibattach(device_t, device_t, void *);
  54
  55 struct pcib_softc {
  56         device_t sc_dev;
  57         struct powerpc_isa_chipset *sc_chipset;
  58 };
  59
  60 extern struct powerpc_isa_chipset genppc_ict;
  61 extern struct genppc_pci_chipset *genppc_pct;
  62
  63 CFATTACH_DECL_NEW(pcib, sizeof(struct pcib_softc),
  64     pcibmatch, pcibattach, NULL, NULL);
  65
  66 void    pcib_callback(device_t);
  67
  68 int
  69 pcibmatch(device_t parent, cfdata_t cf, void *aux)
  70 {
  71         struct pci_attach_args *pa = aux;
  72
  73         /*
  74          * Match PCI-ISA bridge.
  75          */
  76         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
  77             PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) {
  78                 return (1);
  79         }
  80
  81         /*
  82          * some special cases:
  83          */
  84         switch (PCI_VENDOR(pa->pa_id)) {
  85         case PCI_VENDOR_INTEL:
  86                 switch (PCI_PRODUCT(pa->pa_id)) {
  87                 case PCI_PRODUCT_INTEL_SIO:
  88                         /*
  89                          * The Intel SIO identifies itself as a
  90                          * miscellaneous prehistoric.
  91                          */
  92                         return (1);
  93                 }
  94                 break;
  95         }
  96
  97         return (0);
  98 }
  99
 100 void
 101 pcibattach(device_t parent, device_t self, void *aux)
 102 {
 103         struct pci_attach_args *pa = aux;
 104         struct pcib_softc *sc = device_private(self);
 105         char devinfo[256];
 106         u_int32_t v;
 107         int lvlmask = 0;
 108 #ifdef prep
 109         prop_bool_t rav;
 110 #endif
 111
 112         sc->sc_dev = self;
 113
 114         /*
 115          * Just print out a description and defer configuration
 116          * until all PCI devices have been attached.
 117          */
 118         pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
 119         aprint_normal(": %s (rev. 0x%02x)\n", devinfo,
 120             PCI_REVISION(pa->pa_class));
 121
 122         v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x40);
 123         if ((v & 0x20) == 0) {
 124                 aprint_verbose("%s: PIRQ[0-3] not used\n", self->dv_xname);
 125         } else {
 126                 v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x60);
 127                 if ((v & 0x80808080) == 0x80808080) {
 128                         aprint_verbose("%s: PIRQ[0-3] disabled\n",
 129                             self->dv_xname);
 130                 } else {
 131                         int i;
 132                         aprint_verbose("%s:", device_xname(self));
 133                         for (i = 0; i < 4; i++, v >>= 8) {
 134                                 if ((v & 0x80) == 0 && (v & 0x0f) != 0) {
 135                                         aprint_verbose(" PIRQ[%d]=%d", i,
 136                                             v & 0x0f);
 137                                         lvlmask |= (1 << (v & 0x0f));
 138                                 }
 139                         }
 140                         aprint_verbose("\n");
 141                 }
 142         }
 143
 144         /*
 145          * If we have an 83C553F-G sitting on a RAVEN host bridge,
 146          * then we need to rewire some interrupts.
 147          * The IDE Interrupt Routing Control Register lives at 0x43,
 148          * and defaults to 0xEF, which means the primary controller
 149          * interrupts on ivr-14, and the secondary on ivr-15. We
 150          * reset it to 0xEE to fire them both at ivr-14.
 151          * We have to rewrite the interrupt map, because the bridge map told
 152          * us that the interrupt is MPIC 0, which is the bridge intr for
 153          * the 8259.
 154          * Additionally, sometimes the PCI Interrupt Routing Control Register
 155          * is improperly initialized, causing all sorts of wierd interrupt
 156          * issues on the machine.  The manual says it should default to
 157          * 0000h (index 45-44h) however it would appear that PPCBUG is
 158          * setting it up differently.  Reset it to 0000h.
 159          */
 160
 161         if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SYMPHONY &&
 162             PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SYMPHONY_83C553) {
 163                 v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x44) & 0xffff0000;
 164                 pci_conf_write(pa->pa_pc, pa->pa_tag, 0x44, v);
 165         }
 166
 167 #ifdef prep
 168         rav = prop_dictionary_get(device_properties(parent),
 169             "prep-raven-pchb");
 170
 171         if (rav != NULL && prop_bool_true(rav) &&
 172             PCI_VENDOR(pa->pa_id) == PCI_VENDOR_SYMPHONY &&
 173             PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SYMPHONY_83C553) {
 174
 175                 prop_dictionary_t dict, devsub;
 176                 prop_number_t pinsub;
 177                 struct genppc_pci_chipset_businfo *pbi;
 178
 179                 v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x40) & 0x00ffffff;
 180                 v |= 0xee000000;
 181                 pci_conf_write(pa->pa_pc, pa->pa_tag, 0x40, v);
 182
 183                 pbi = SIMPLEQ_FIRST(&genppc_pct->pc_pbi);
 184                 dict = prop_dictionary_get(pbi->pbi_properties,
 185                     "prep-pci-intrmap");
 186                 devsub = prop_dictionary_get(dict, "devfunc-11");
 187                 pinsub = prop_number_create_integer(14);
 188                 prop_dictionary_set(devsub, "pin-A", pinsub);
 189                 prop_object_release(pinsub);
 190                 aprint_verbose_dev(self, "setting pciide irq to 14\n");
 191                 /* irq 14 is level */
 192                 lvlmask = 0x0040;
 193         }
 194 #endif /* prep */
 195
 196         config_defer(self, pcib_callback);
 197 }
 198
 199 void
 200 pcib_callback(device_t self)
 201 {
 202         struct pcib_softc *sc = device_private(self);
 203 #if NISA > 0
 204         struct isabus_attach_args iba;
 205
 206         /*
 207          * Attach the ISA bus behind this bridge.
 208          */
 209         memset(&iba, 0, sizeof(iba));
 210         sc->sc_chipset = &genppc_ict;
 211         iba.iba_ic = sc->sc_chipset;
 212         iba.iba_iot = &genppc_isa_io_space_tag;
 213         iba.iba_memt = &genppc_isa_mem_space_tag;
 214 #if NISADMA > 0
 215         iba.iba_dmat = &isa_bus_dma_tag;
 216 #endif
 217         config_found_ia(sc->sc_dev, "isabus", &iba, isabusprint);
 218 #endif
 219 }