sys/dev/acpi/hpet_acpi.c

   1 /* $NetBSD: hpet_acpi.c,v 1.3 2008/03/21 13:28:14 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: hpet_acpi.c,v 1.3 2008/03/21 13:28:14 xtraeme Exp $");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/errno.h>
  37 #include <sys/device.h>
  38
  39 #include <sys/bus.h>
  40
  41 #include <dev/acpi/acpica.h>
  42 #include <dev/acpi/acpireg.h>
  43 #include <dev/acpi/acpivar.h>
  44
  45 #include <sys/time.h>
  46 #include <sys/timetc.h>
  47
  48 #include <dev/ic/hpetvar.h>
  49
  50 static int      hpet_acpi_match(device_t, cfdata_t, void *);
  51 static void     hpet_acpi_attach(device_t, device_t, void *);
  52
  53
  54 CFATTACH_DECL_NEW(hpet_acpi, sizeof(struct hpet_softc), hpet_acpi_match,
  55     hpet_acpi_attach, NULL, NULL);
  56
  57 /*
  58  * Supported device IDs
  59  */
  60
  61 static const char * const hpet_acpi_ids[] = {
  62         "PNP0103",
  63         NULL
  64 };
  65
  66 /*
  67  * hpet_acpi_match: autoconf(9) match routine
  68  */
  69 static int
  70 hpet_acpi_match(device_t parent, cfdata_t match, void *aux)
  71 {
  72         struct acpi_attach_args *aa = aux;
  73
  74         if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
  75                 return 0;
  76
  77         return acpi_match_hid(aa->aa_node->ad_devinfo, hpet_acpi_ids);
  78 }
  79
  80 static void
  81 hpet_acpi_attach(device_t parent, device_t self, void *aux)
  82 {
  83         struct hpet_softc *sc = device_private(self);
  84         struct acpi_attach_args *aa = aux;
  85         struct acpi_resources res;
  86         struct acpi_mem *mem;
  87         ACPI_STATUS rv;
  88
  89         /* parse resources */
  90         rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
  91             &res, &acpi_resource_parse_ops_default);
  92         if (ACPI_FAILURE(rv))
  93                 return;
  94
  95         /* find our mem registers */
  96         mem = acpi_res_mem(&res, 0);
  97         if (mem == NULL) {
  98                 aprint_error_dev(self,
  99                     "unable to find mem register resource\n");
 100                 goto out;
 101         }
 102
 103         sc->sc_memt = aa->aa_memt;
 104         if (bus_space_map(sc->sc_memt, mem->ar_base, mem->ar_length,
 105                     0, &sc->sc_memh)) {
 106                 aprint_error_dev(self, "can't map mem space\n");
 107                 goto out;
 108         }
 109
 110         hpet_attach_subr(self);
 111
 112  out:
 113         acpi_resource_cleanup(&res);
 114 }