sys/mips/malta/obio.c

   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("$FreeBSD$");
  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     rman_res_t start, rman_res_t end, rman_res_t 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);