The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/malta/obio.c

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    1 /*      $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
    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  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. 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 WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
   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 /*
   39  * On-board device autoconfiguration support for Intel IQ80321
   40  * evaluation boards.
   41  */
   42 
   43 #include <sys/cdefs.h>
   44 __FBSDID("$FreeBSD: releng/10.1/sys/mips/malta/obio.c 202175 2010-01-12 21:36:08Z imp $");
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/bus.h>
   49 #include <sys/kernel.h>
   50 #include <sys/module.h>
   51 #include <sys/rman.h>
   52 #include <sys/malloc.h>
   53 
   54 #include <machine/bus.h>
   55 
   56 #include <mips/malta/maltareg.h>
   57 #include <mips/malta/obiovar.h>
   58 
   59 int     obio_probe(device_t);
   60 int     obio_attach(device_t);
   61 
   62 /*
   63  * A bit tricky and hackish. Since we need OBIO to rely
   64  * on PCI we make it pseudo-pci device. But there should 
   65  * be only one such device, so we use this static flag 
   66  * to prevent false positives on every real PCI device probe.
   67  */
   68 static int have_one = 0;
   69 
   70 int
   71 obio_probe(device_t dev)
   72 {
   73         if (!have_one) {
   74                 have_one = 1;
   75                 return 0;
   76         }
   77         return (ENXIO);
   78 }
   79 
   80 int
   81 obio_attach(device_t dev)
   82 {
   83         struct obio_softc *sc = device_get_softc(dev);
   84 
   85         sc->oba_st = mips_bus_space_generic;
   86         sc->oba_addr = MIPS_PHYS_TO_KSEG1(MALTA_UART0ADR);
   87         sc->oba_size = MALTA_PCIMEM3_SIZE;
   88         sc->oba_rman.rm_type = RMAN_ARRAY;
   89         sc->oba_rman.rm_descr = "OBIO I/O";
   90         if (rman_init(&sc->oba_rman) != 0 ||
   91             rman_manage_region(&sc->oba_rman,
   92             sc->oba_addr, sc->oba_addr + sc->oba_size) != 0)
   93                 panic("obio_attach: failed to set up I/O rman");
   94         sc->oba_irq_rman.rm_type = RMAN_ARRAY;
   95         sc->oba_irq_rman.rm_descr = "OBIO IRQ";
   96 
   97         /* 
   98          * This module is intended for UART purposes only and
   99          * it's IRQ is 4
  100          */
  101         if (rman_init(&sc->oba_irq_rman) != 0 ||
  102             rman_manage_region(&sc->oba_irq_rman, 4, 4) != 0)
  103                 panic("obio_attach: failed to set up IRQ rman");
  104 
  105         device_add_child(dev, "uart", 0);
  106         bus_generic_probe(dev);
  107         bus_generic_attach(dev);
  108 
  109         return (0);
  110 }
  111 
  112 static struct resource *
  113 obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
  114     u_long start, u_long end, u_long count, u_int flags)
  115 {
  116         struct resource *rv;
  117         struct rman *rm;
  118         bus_space_tag_t bt = 0;
  119         bus_space_handle_t bh = 0;
  120         struct obio_softc *sc = device_get_softc(bus);
  121 
  122         switch (type) {
  123         case SYS_RES_IRQ:
  124                 rm = &sc->oba_irq_rman;
  125                 break;
  126         case SYS_RES_MEMORY:
  127                 return (NULL);
  128         case SYS_RES_IOPORT:
  129                 rm = &sc->oba_rman;
  130                 bt = sc->oba_st;
  131                 bh = sc->oba_addr;
  132                 start = bh;
  133                 break;
  134         default:
  135                 return (NULL);
  136         }
  137 
  138 
  139         rv = rman_reserve_resource(rm, start, end, count, flags, child);
  140         if (rv == NULL) 
  141                 return (NULL);
  142         if (type == SYS_RES_IRQ)
  143                 return (rv);
  144         rman_set_rid(rv, *rid);
  145         rman_set_bustag(rv, bt);
  146         rman_set_bushandle(rv, bh);
  147         
  148         if (0) {
  149                 if (bus_activate_resource(child, type, *rid, rv)) {
  150                         rman_release_resource(rv);
  151                         return (NULL);
  152                 }
  153         }
  154         return (rv);
  155 
  156 }
  157 
  158 static int
  159 obio_activate_resource(device_t bus, device_t child, int type, int rid,
  160     struct resource *r)
  161 {
  162         return (0);
  163 }
  164 static device_method_t obio_methods[] = {
  165         DEVMETHOD(device_probe, obio_probe),
  166         DEVMETHOD(device_attach, obio_attach),
  167 
  168         DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
  169         DEVMETHOD(bus_activate_resource, obio_activate_resource),
  170         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  171         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  172 
  173         {0, 0},
  174 };
  175 
  176 static driver_t obio_driver = {
  177         "obio",
  178         obio_methods,
  179         sizeof(struct obio_softc),
  180 };
  181 static devclass_t obio_devclass;
  182 
  183 DRIVER_MODULE(obio, pci, obio_driver, obio_devclass, 0, 0);

Cache object: d84d0579e096242e3da5ff7db3cdefcd


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