acpi_ged.c revision 1.1 
1/* $NetBSD: acpi_ged.c,v 1.1 2018/10/22 22:36:19 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jared McNeill <jmcneill@invisible.ca>.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: acpi_ged.c,v 1.1 2018/10/22 22:36:19 jmcneill Exp $");
34
35#include <sys/param.h>
36#include <sys/bus.h>
37#include <sys/cpu.h>
38#include <sys/device.h>
39#include <sys/intr.h>
40#include <sys/kmem.h>
41
42#include <dev/acpi/acpireg.h>
43#include <dev/acpi/acpivar.h>
44#include <dev/acpi/acpi_event.h>
45
46static int	acpi_ged_match(device_t, cfdata_t, void *);
47static void	acpi_ged_attach(device_t, device_t, void *);
48
49static void	acpi_ged_register_event(void *, struct acpi_event *, struct acpi_irq *);
50static int	acpi_ged_intr(void *);
51
52CFATTACH_DECL_NEW(acpiged, 0, acpi_ged_match, acpi_ged_attach, NULL, NULL);
53
54static const char * const compatible[] = {
55	"ACPI0013",
56	NULL
57};
58
59static int
60acpi_ged_match(device_t parent, cfdata_t cf, void *aux)
61{
62	struct acpi_attach_args *aa = aux;
63
64	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
65		return 0;
66
67	return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
68}
69
70static void
71acpi_ged_attach(device_t parent, device_t self, void *aux)
72{
73	struct acpi_attach_args * const aa = aux;
74	ACPI_HANDLE handle = aa->aa_node->ad_handle;
75
76        if (ACPI_FAILURE(acpi_event_create_int(self, handle, acpi_ged_register_event, self)))
77                aprint_error_dev(self, "failed to create events\n");
78}
79
80static void
81acpi_ged_register_event(void *priv, struct acpi_event *ev, struct acpi_irq *irq)
82{
83	device_t dev = priv;
84	void *ih;
85
86	const int type = (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL;
87	ih = intr_establish(irq->ar_irq, IPL_VM, type, acpi_ged_intr, ev);
88	if (ih == NULL) {
89		aprint_error_dev(dev, "couldn't establish interrupt (irq %d)\n", irq->ar_irq);
90		return;
91	}
92}
93
94static int
95acpi_ged_intr(void *priv)
96{
97	struct acpi_event * const ev = priv;
98
99	acpi_event_notify(ev);
100
101	return 1;
102}
103