sys/arch/i386/pci/geode.c

   1 /*      $NetBSD: geode.c,v 1.13 2008/05/10 13:38:34 jmcneill Exp $      */
   2
   3 /*-
   4  * Copyright (c) 2005 David Young.  All rights reserved.
   5  *
   6  * This code was written by David Young and merged with geodecntr code
   7  * by Frank Kardel.
   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  *
  18  * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
  19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  21  * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DAVID
  22  * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  23  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  24  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  29  * OF SUCH DAMAGE.
  30  */
  31 /*-
  32  * Copyright (c) 2002 The NetBSD Foundation, Inc.
  33  * All rights reserved.
  34  *
  35  * This code is derived from software contributed to The NetBSD Foundation
  36  * by Jason R. Thorpe.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  48  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  49  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  50  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  51  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  52  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  53  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  54  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  55  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  56  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  57  * POSSIBILITY OF SUCH DAMAGE.
  58  */
  59
  60 /*
  61  * Device driver for the special devices attached to the GBA (watchdog, high
  62  * resolution counter, ...) in the AMD Geode SC1100 processor.
  63  */
  64
  65 #include <sys/cdefs.h>
  66
  67 __KERNEL_RCSID(0, "$NetBSD: geode.c,v 1.13 2008/05/10 13:38:34 jmcneill Exp $");
  68
  69 #include <sys/param.h>
  70 #include <sys/systm.h>
  71 #include <sys/device.h>
  72 #include <sys/wdog.h>
  73 #include <uvm/uvm_extern.h>
  74 #include <machine/bus.h>
  75 #include <dev/pci/pcivar.h>
  76 #include <dev/pci/pcidevs.h>
  77 #include <arch/i386/pci/geodevar.h>
  78 #include <arch/i386/pci/geodereg.h>
  79 #include <dev/sysmon/sysmonvar.h>
  80
  81 #ifdef GEODE_DEBUG
  82 #define GEODE_DPRINTF(__x) printf __x
  83 #else /* GEODE_DEBUG */
  84 #define GEODE_DPRINTF(__x) /* nothing */
  85 #endif
  86
  87 static int
  88 geode_gcb_match(device_t parent, cfdata_t match, void *aux)
  89 {
  90         struct pci_attach_args *pa = aux;
  91
  92         if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS &&
  93             PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NS_SC1100_XBUS)
  94                 return (10);    /* XXX beat pchb? -dyoung */
  95
  96         return (0);
  97 }
  98
  99 static void
 100 geode_gcb_attach(device_t parent, device_t self, void *aux)
 101 {
 102         struct geode_gcb_softc *sc = device_private(self);
 103         struct pci_attach_args *pa = aux;
 104         uint32_t cba;
 105         u_int rev;
 106
 107         cba = pci_conf_read(pa->pa_pc, pa->pa_tag, SC1100_XBUS_CBA_SCRATCHPAD);
 108         sc->sc_iot = pa->pa_iot;
 109         if (bus_space_map(sc->sc_iot, (bus_addr_t)cba, SC1100_GCB_SIZE, 0,
 110             &sc->sc_ioh) != 0) {
 111                 aprint_error(": unable to map registers\n");
 112                 return;
 113         }
 114
 115         GEODE_DPRINTF(("%s: mapped %u bytes at %#08" PRIx32 "\n",
 116             device_xname(self), SC1100_GCB_SIZE, cba));
 117
 118         rev = bus_space_read_1(sc->sc_iot, sc->sc_ioh, SC1100_GCB_REV_B);
 119
 120         aprint_naive("\n");
 121         aprint_normal(": AMD Geode GCB (rev. 0x%02x)\n", rev);
 122
 123         while (config_found(self, NULL, NULL) != NULL)
 124                 /* empty */;
 125 }
 126 static int
 127 geode_gcb_detach(device_t self, int flags)
 128 {
 129         int rc;
 130         struct geode_gcb_softc *sc = device_private(self);
 131
 132         if ((rc = config_detach_children(self, flags)) != 0)
 133                 return rc;
 134
 135         bus_space_unmap(sc->sc_iot, sc->sc_ioh, SC1100_GCB_SIZE);
 136         return 0;
 137 }
 138
 139 static void
 140 geode_gcb_childdetached(device_t parent, device_t child)
 141 {
 142         /* We hold no references to child devices, so there is nothing
 143          * to do.
 144          */
 145 }
 146
 147 CFATTACH_DECL2_NEW(geodegcb, sizeof(struct geode_gcb_softc),
 148     geode_gcb_match, geode_gcb_attach, geode_gcb_detach, NULL, NULL,
 149     geode_gcb_childdetached);