sys/dev/pci/iop_pci.c

   1 /*      $NetBSD: iop_pci.c,v 1.25 2009/05/06 10:34:32 cegger Exp $      */
   2
   3 /*-
   4  * Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Andrew Doran.
   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 /*
  33  * PCI front-end for `iop' driver.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: iop_pci.c,v 1.25 2009/05/06 10:34:32 cegger Exp $");
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/device.h>
  43 #include <sys/queue.h>
  44 #include <sys/proc.h>
  45
  46 #include <machine/endian.h>
  47 #include <sys/bus.h>
  48
  49 #include <dev/pci/pcidevs.h>
  50 #include <dev/pci/pcivar.h>
  51
  52 #include <dev/i2o/i2o.h>
  53 #include <dev/i2o/iopreg.h>
  54 #include <dev/i2o/iopio.h>
  55 #include <dev/i2o/iopvar.h>
  56
  57 #define PCI_INTERFACE_I2O_POLLED        0x00
  58 #define PCI_INTERFACE_I2O_INTRDRIVEN    0x01
  59
  60 static void     iop_pci_attach(device_t, device_t, void *);
  61 static int      iop_pci_match(device_t, cfdata_t, void *);
  62
  63 CFATTACH_DECL(iop_pci, sizeof(struct iop_softc),
  64     iop_pci_match, iop_pci_attach, NULL, NULL);
  65
  66 static int
  67 iop_pci_match(device_t parent, cfdata_t match, void *aux)
  68 {
  69         struct pci_attach_args *pa;
  70         u_int product, vendor;
  71         pcireg_t reg;
  72
  73         pa = aux;
  74
  75         /*
  76          * Look for an "intelligent I/O processor" that adheres to the I2O
  77          * specification.  Ignore the device if it doesn't support interrupt
  78          * driven operation.
  79          */
  80         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O &&
  81             PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD &&
  82             PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN)
  83                 return (1);
  84
  85         /*
  86          * Match boards that don't conform exactly to the spec.
  87          */
  88         vendor = PCI_VENDOR(pa->pa_id);
  89         product = PCI_PRODUCT(pa->pa_id);
  90
  91         if (vendor == PCI_VENDOR_DPT &&
  92             (product == PCI_PRODUCT_DPT_RAID_I2O ||
  93             product == PCI_PRODUCT_DPT_RAID_2005S))
  94                 return (1);
  95
  96         if (vendor == PCI_VENDOR_INTEL &&
  97             (product == PCI_PRODUCT_INTEL_80960RM_2 ||
  98             product == PCI_PRODUCT_INTEL_80960_RP)) {
  99                 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
 100                 if (PCI_VENDOR(reg) == PCI_VENDOR_PROMISE)
 101                         return (1);
 102         }
 103
 104         return (0);
 105 }
 106
 107 static void
 108 iop_pci_attach(device_t parent, device_t self, void *aux)
 109 {
 110         struct pci_attach_args *pa;
 111         struct iop_softc *sc;
 112         pci_chipset_tag_t pc;
 113         pci_intr_handle_t ih;
 114         const char *intrstr;
 115         pcireg_t reg;
 116         int i;
 117
 118         sc = device_private(self);
 119         pa = (struct pci_attach_args *)aux;
 120         pc = pa->pa_pc;
 121         printf(": ");
 122
 123         /*
 124          * The kernel always uses the first memory mapping to communicate
 125          * with the IOP.
 126          */
 127         for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) {
 128                 reg = pci_conf_read(pc, pa->pa_tag, i);
 129                 if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) {
 130                         sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg);
 131                         break;
 132                 }
 133         }
 134         if (i == PCI_MAPREG_END) {
 135                 printf("can't find mapping\n");
 136                 return;
 137         }
 138
 139         /* Map the register window. */
 140         if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot,
 141             &sc->sc_ioh, NULL, NULL)) {
 142                 aprint_error_dev(&sc->sc_dv, "can't map register window\n");
 143                 return;
 144         }
 145
 146         /* Map the 2nd register window. */
 147         if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DPT &&
 148             PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DPT_RAID_2005S) {
 149                 i += 4; /* next BAR */
 150                 if (i == PCI_MAPREG_END) {
 151                         printf("can't find mapping\n");
 152                         return;
 153                 }
 154
 155 #if 0
 156                 /* Should we check it? (see FreeBSD's asr driver) */
 157                 reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
 158                 printf("subid %x, %x\n", PCI_VENDOR(reg), PCI_PRODUCT(reg));
 159 #endif
 160                 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0,
 161                     &sc->sc_msg_iot, &sc->sc_msg_ioh, NULL, NULL)) {
 162                         aprint_error_dev(&sc->sc_dv, "can't map 2nd register window\n");
 163                         return;
 164                 }
 165         } else {
 166                 /* iop devices other than 2005S */
 167                 sc->sc_msg_iot = sc->sc_iot;
 168                 sc->sc_msg_ioh = sc->sc_ioh;
 169         }
 170
 171         sc->sc_pcibus = pa->pa_bus;
 172         sc->sc_pcidev = pa->pa_device;
 173         sc->sc_dmat = pa->pa_dmat;
 174         sc->sc_bus_memt = pa->pa_memt;
 175         sc->sc_bus_iot = pa->pa_iot;
 176
 177         /* Enable the device. */
 178         reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
 179         pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
 180                        reg | PCI_COMMAND_MASTER_ENABLE);
 181
 182         /* Map and establish the interrupt.. */
 183         if (pci_intr_map(pa, &ih)) {
 184                 printf("can't map interrupt\n");
 185                 return;
 186         }
 187         intrstr = pci_intr_string(pc, ih);
 188         sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc);
 189         if (sc->sc_ih == NULL) {
 190                 printf("can't establish interrupt");
 191                 if (intrstr != NULL)
 192                         printf(" at %s", intrstr);
 193                 printf("\n");
 194                 return;
 195         }
 196
 197         /* Attach to the bus-independent code. */
 198         iop_init(sc, intrstr);
 199 }