1/*-
2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
3 * Copyright (c) 2014 The FreeBSD Foundation
4 * All rights reserved.
5 *
6 * This software was developed by SRI International and the University of
7 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
8 * ("CTSRD"), as part of the DARPA CRASH research programme.
9 *
10 * Portions of this software were developed by Andrew Turner
11 * under sponsorship from the FreeBSD Foundation.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35/*
36 * VirtIO MMIO interface.
37 * This driver is heavily based on VirtIO PCI interface driver.
38 */
39
40#include "opt_acpi.h"
41
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD$");
44
45#include <sys/param.h>
46#include <sys/systm.h>
47#include <sys/bus.h>
48#include <sys/kernel.h>
49#include <sys/module.h>
50
51#include <contrib/dev/acpica/include/acpi.h>
52#include <dev/acpica/acpivar.h>
53
54#include <dev/virtio/mmio/virtio_mmio.h>
55
56static int	vtmmio_acpi_probe(device_t);
57
58static device_method_t vtmmio_acpi_methods[] = {
59	/* Device interface. */
60	DEVMETHOD(device_probe,		vtmmio_acpi_probe),
61
62	DEVMETHOD_END
63};
64
65DEFINE_CLASS_1(virtio_mmio, vtmmio_acpi_driver, vtmmio_acpi_methods,
66    sizeof(struct vtmmio_softc), vtmmio_driver);
67
68static devclass_t vtmmio_acpi_devclass;
69
70DRIVER_MODULE(virtio_mmio, acpi, vtmmio_acpi_driver, vtmmio_acpi_devclass, 0,0);
71MODULE_DEPEND(virtio_mmio, acpi, 1, 1, 1);
72
73static int
74vtmmio_acpi_probe(device_t dev)
75{
76	ACPI_HANDLE h;
77
78	if ((h = acpi_get_handle(dev)) == NULL)
79		return (ENXIO);
80
81	if (!acpi_MatchHid(h, "LNRO0005"))
82		return (ENXIO);
83
84	return (vtmmio_probe(dev));
85}
86