iop_pci.c

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    1 /*      $NetBSD: iop_pci.c,v 1.14 2003/12/09 19:43:53 ad 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  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *        This product includes software developed by the NetBSD
   21  *        Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 /*
   40  * PCI front-end for `iop' driver.
   41  */
   42 
   43 #include <sys/cdefs.h>
   44 __KERNEL_RCSID(0, "$NetBSD: iop_pci.c,v 1.14 2003/12/09 19:43:53 ad Exp $");
   45 
   46 #include "opt_i2o.h"
   47 
   48 #include <sys/param.h>
   49 #include <sys/systm.h>
   50 #include <sys/kernel.h>
   51 #include <sys/device.h>
   52 #include <sys/queue.h>
   53 #include <sys/proc.h>
   54 
   55 #include <machine/endian.h>
   56 #include <machine/bus.h>
   57 
   58 #include <dev/pci/pcidevs.h>
   59 #include <dev/pci/pcivar.h>
   60 
   61 #include <dev/i2o/i2o.h>
   62 #include <dev/i2o/iopreg.h>
   63 #include <dev/i2o/iopio.h>
   64 #include <dev/i2o/iopvar.h>
   65 
   66 #define PCI_INTERFACE_I2O_POLLED        0x00
   67 #define PCI_INTERFACE_I2O_INTRDRIVEN    0x01
   68 
   69 static void     iop_pci_attach(struct device *, struct device *, void *);
   70 static int      iop_pci_match(struct device *, struct cfdata *, void *);
   71 
   72 CFATTACH_DECL(iop_pci, sizeof(struct iop_softc),
   73     iop_pci_match, iop_pci_attach, NULL, NULL);
   74 
   75 static int
   76 iop_pci_match(struct device *parent, struct cfdata *match, void *aux)
   77 {
   78         struct pci_attach_args *pa;
   79         u_int product, vendor;
   80         pcireg_t reg;
   81 
   82         pa = aux;
   83 
   84         /* 
   85          * Look for an "intelligent I/O processor" that adheres to the I2O
   86          * specification.  Ignore the device if it doesn't support interrupt
   87          * driven operation.
   88          */
   89         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O &&
   90             PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD &&
   91             PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN)
   92                 return (1);
   93 
   94         /*
   95          * Match boards that don't conform exactly to the spec.
   96          */
   97         vendor = PCI_VENDOR(pa->pa_id);
   98         product = PCI_PRODUCT(pa->pa_id);
   99 
  100         if (vendor == PCI_VENDOR_DPT && 
  101             (product == PCI_PRODUCT_DPT_RAID_I2O ||
  102             product == PCI_PRODUCT_DPT_RAID_2005S))
  103                 return (1);
  104 
  105         if (vendor == PCI_VENDOR_INTEL &&
  106             (product == PCI_PRODUCT_INTEL_80960RM_2 ||
  107             product == PCI_PRODUCT_INTEL_80960_RP)) {
  108                 reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
  109                 if (PCI_VENDOR(reg) == PCI_VENDOR_PROMISE)
  110                         return (1);
  111         }
  112 
  113         return (0);
  114 }
  115 
  116 static void
  117 iop_pci_attach(struct device *parent, struct device *self, void *aux)
  118 {
  119         struct pci_attach_args *pa;
  120         struct iop_softc *sc;
  121         pci_chipset_tag_t pc;
  122         pci_intr_handle_t ih;
  123         const char *intrstr;
  124         pcireg_t reg;
  125         int i;
  126 
  127         sc = (struct iop_softc *)self;
  128         pa = (struct pci_attach_args *)aux;
  129         pc = pa->pa_pc;
  130         printf(": ");
  131 
  132         /*
  133          * The kernel always uses the first memory mapping to communicate
  134          * with the IOP.
  135          */
  136         for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) {
  137                 reg = pci_conf_read(pc, pa->pa_tag, i);
  138                 if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM) {
  139                         sc->sc_memaddr = PCI_MAPREG_MEM_ADDR(reg);
  140                         break;
  141                 }
  142         }
  143         if (i == PCI_MAPREG_END) {
  144                 printf("can't find mapping\n");
  145                 return;
  146         }
  147 
  148         /* Map the register window. */
  149         if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot,
  150             &sc->sc_ioh, NULL, NULL)) {
  151                 printf("%s: can't map register window\n", sc->sc_dv.dv_xname);
  152                 return;
  153         }
  154 
  155         /* Map the 2nd register window. */
  156         if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DPT &&
  157             PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DPT_RAID_2005S) {
  158                 i += 4; /* next BAR */
  159                 if (i == PCI_MAPREG_END) {
  160                         printf("can't find mapping\n");
  161                         return;
  162                 }
  163 
  164 #if 0
  165                 /* Should we check it? (see FreeBSD's asr driver) */
  166                 reg = pci_conf_read(pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
  167                 printf("subid %x, %x\n", PCI_VENDOR(reg), PCI_PRODUCT(reg));
  168 #endif
  169                 if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0,
  170                     &sc->sc_msg_iot, &sc->sc_msg_ioh, NULL, NULL)) {
  171                         printf("%s: can't map 2nd register window\n",
  172                             sc->sc_dv.dv_xname);
  173                         return;
  174                 }
  175         } else {
  176                 /* iop devices other than 2005S */
  177                 sc->sc_msg_iot = sc->sc_iot;
  178                 sc->sc_msg_ioh = sc->sc_ioh;
  179         }
  180 
  181         sc->sc_pcibus = pa->pa_bus;
  182         sc->sc_pcidev = pa->pa_device;
  183         sc->sc_dmat = pa->pa_dmat;
  184         sc->sc_bus_memt = pa->pa_memt;
  185         sc->sc_bus_iot = pa->pa_iot;
  186 
  187         /* Enable the device. */
  188         reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
  189         pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
  190                        reg | PCI_COMMAND_MASTER_ENABLE);
  191 
  192         /* Map and establish the interrupt.  XXX IPL_BIO. */
  193         if (pci_intr_map(pa, &ih)) {
  194                 printf("can't map interrupt\n");
  195                 return;
  196         }
  197         intrstr = pci_intr_string(pc, ih);
  198         sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc);
  199         if (sc->sc_ih == NULL) {
  200                 printf("can't establish interrupt");
  201                 if (intrstr != NULL)
  202                         printf(" at %s", intrstr);
  203                 printf("\n");
  204                 return;
  205         }
  206 
  207         /* Attach to the bus-independent code. */
  208         iop_init(sc, intrstr);
  209 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/pci/iop_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/iop_pci.c