hpet_acpi.c revision 1.5 
1/* $NetBSD: hpet_acpi.c,v 1.5 2010/03/05 14:00:17 jruoho 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 1.5 2010/03/05 14:00:17 jruoho Exp $");
33
34#include <sys/param.h>
35#include <sys/device.h>
36#include <sys/systm.h>
37#include <sys/time.h>
38#include <sys/timetc.h>
39
40#include <dev/acpi/acpivar.h>
41
42#include <dev/ic/hpetvar.h>
43
44static int	hpet_acpi_match(device_t, cfdata_t, void *);
45static void	hpet_acpi_attach(device_t, device_t, void *);
46
47
48CFATTACH_DECL_NEW(hpet_acpi, sizeof(struct hpet_softc), hpet_acpi_match,
49    hpet_acpi_attach, NULL, NULL);
50
51/*
52 * Supported device IDs
53 */
54
55static const char * const hpet_acpi_ids[] = {
56	"PNP0103",
57	NULL
58};
59
60/*
61 * hpet_acpi_match: autoconf(9) match routine
62 */
63static int
64hpet_acpi_match(device_t parent, cfdata_t match, void *aux)
65{
66	struct acpi_attach_args *aa = aux;
67
68	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
69		return 0;
70
71	return acpi_match_hid(aa->aa_node->ad_devinfo, hpet_acpi_ids);
72}
73
74static void
75hpet_acpi_attach(device_t parent, device_t self, void *aux)
76{
77	struct hpet_softc *sc = device_private(self);
78	struct acpi_attach_args *aa = aux;
79	struct acpi_resources res;
80	struct acpi_mem *mem;
81	ACPI_STATUS rv;
82
83	/* parse resources */
84	rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
85	    &res, &acpi_resource_parse_ops_default);
86	if (ACPI_FAILURE(rv))
87		return;
88
89	/* find our mem registers */
90	mem = acpi_res_mem(&res, 0);
91	if (mem == NULL) {
92		aprint_error_dev(self,
93		    "unable to find mem register resource\n");
94		goto out;
95	}
96
97	sc->sc_memt = aa->aa_memt;
98	if (bus_space_map(sc->sc_memt, mem->ar_base, mem->ar_length,
99		    0, &sc->sc_memh)) {
100		aprint_error_dev(self, "can't map mem space\n");
101		goto out;
102	}
103
104	hpet_attach_subr(self);
105
106 out:
107	acpi_resource_cleanup(&res);
108}
109