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/param.h>
43 #include <sys/systm.h>
44 #include <sys/bus.h>
45 #include <sys/kernel.h>
46 #include <sys/module.h>
47
48 #include <contrib/dev/acpica/include/acpi.h>
49 #include <dev/acpica/acpivar.h>
50
51 #include <dev/virtio/mmio/virtio_mmio.h>
52
53 static int vtmmio_acpi_probe(device_t);
54
55 static device_method_t vtmmio_acpi_methods[] = {
56 /* Device interface. */
57 DEVMETHOD(device_probe, vtmmio_acpi_probe),
58
59 DEVMETHOD_END
60 };
61
62 DEFINE_CLASS_1(virtio_mmio, vtmmio_acpi_driver, vtmmio_acpi_methods,
63 sizeof(struct vtmmio_softc), vtmmio_driver);
64
65 DRIVER_MODULE(virtio_mmio, acpi, vtmmio_acpi_driver, 0,0);
66 MODULE_DEPEND(virtio_mmio, acpi, 1, 1, 1);
67
68 static int
vtmmio_acpi_probe(device_t dev)69 vtmmio_acpi_probe(device_t dev)
70 {
71 ACPI_HANDLE h;
72
73 if ((h = acpi_get_handle(dev)) == NULL)
74 return (ENXIO);
75
76 if (!acpi_MatchHid(h, "LNRO0005"))
77 return (ENXIO);
78
79 return (vtmmio_probe(dev));
80 }
81