sys/arch/x86/pci/amdpcib_hpet.c

   1 /* $NetBSD: amdpcib_hpet.c,v 1.3 2008/03/21 12:29:38 xtraeme Exp $ */
   2
   3 /*
   4  * Copyright (c) 2006 Nicolas Joly
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __KERNEL_RCSID(0, "$NetBSD: amdpcib_hpet.c,v 1.3 2008/03/21 12:29:38 xtraeme Exp $");
  33
  34 #include <sys/systm.h>
  35 #include <sys/device.h>
  36
  37 #include <sys/time.h>
  38 #include <sys/timetc.h>
  39
  40 #include <machine/bus.h>
  41
  42 #include <dev/pci/pcivar.h>
  43 #include <dev/pci/pcireg.h>
  44 #include <dev/pci/pcidevs.h>
  45
  46 #include <dev/ic/hpetvar.h>
  47
  48
  49 static int      amdpcib_hpet_match(device_t , cfdata_t , void *);
  50 static void     amdpcib_hpet_attach(device_t, device_t, void *);
  51
  52 CFATTACH_DECL_NEW(amdpcib_hpet, sizeof(struct hpet_softc), amdpcib_hpet_match,
  53     amdpcib_hpet_attach, NULL, NULL);
  54
  55 static int
  56 amdpcib_hpet_match(device_t parent, cfdata_t match, void *aux)
  57 {
  58         return 1;
  59 }
  60
  61 static void
  62 amdpcib_hpet_attach(device_t parent, device_t self, void *aux)
  63 {
  64         struct hpet_softc *sc = device_private(self);
  65         struct pci_attach_args *pa = aux;
  66         pcireg_t conf, addr;
  67
  68         aprint_naive("\n");
  69         aprint_normal(": HPET timer\n");
  70
  71         conf = pci_conf_read(pa->pa_pc, pa->pa_tag, 0xa0);
  72         if ((conf & 1) == 0) {
  73                 aprint_normal_dev(self, "HPET timer is disabled\n");
  74                 return;
  75         }
  76
  77         sc->sc_memt = pa->pa_memt;
  78
  79         addr = conf & 0xfffffc00;
  80         if (bus_space_map(sc->sc_memt, addr, 1024, 0,
  81             &sc->sc_memh)) {
  82                 aprint_error_dev(self, "failed to map mem\n");
  83                 return;
  84         }
  85
  86         hpet_attach_subr(self);
  87 }