1 /*
2 * Copyright (c) 2008, 2009 Michael Shalayeff
3 * Copyright (c) 2009, 2010 Hans-Joerg Hoexer
4 * All rights reserved.
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
15 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
16 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 *
18 * $FreeBSD: head/sys/dev/tpm/tpm_acpi.c 365144 2020-09-01 21:50:31Z mjg $
19 */
20
21 #include <sys/param.h>
22 #include <sys/systm.h>
23 #include <sys/kernel.h>
24 #include <sys/malloc.h>
25 #include <sys/proc.h>
26
27 #include <sys/module.h>
28 #include <sys/conf.h>
29 #include <sys/uio.h>
30 #include <sys/bus.h>
31
32 #include <sys/rman.h>
33
34 #include <machine/md_var.h>
35
36 #include <bus/isa/isareg.h>
37 #include <bus/isa/isavar.h>
38 #include "tpmvar.h"
39
40 #include "opt_acpi.h"
41 #include <contrib/dev/acpica/source/include/acpi.h>
42 #include <contrib/dev/acpica/source/include/accommon.h>
43 #include <dev/acpica/acpivar.h>
44
45 char *tpm_ids[] = {"ATM1200", "BCM0102", "INTC0102", "SNO3504", "WEC1000",
46 "PNP0C31", NULL};
47
48 static int
tpm_acpi_probe(device_t dev)49 tpm_acpi_probe(device_t dev)
50 {
51 if (ACPI_ID_PROBE(device_get_parent(dev), dev, tpm_ids) != NULL) {
52 device_set_desc(dev, "Trusted Platform Module");
53 return BUS_PROBE_DEFAULT;
54 }
55
56 return ENXIO;
57 }
58
59 static device_method_t tpm_acpi_methods[] = {
60 #if 0
61 /*In some case, TPM existence is found only in TPCA header*/
62 DEVMETHOD(device_identify, tpm_acpi_identify),
63 #endif
64
65 DEVMETHOD(device_probe, tpm_acpi_probe),
66 DEVMETHOD(device_attach, tpm_attach),
67 DEVMETHOD(device_detach, tpm_detach),
68 DEVMETHOD(device_suspend, tpm_suspend),
69 DEVMETHOD(device_resume, tpm_resume),
70 { 0, 0 }
71 };
72 static driver_t tpm_acpi_driver = {
73 "tpm", tpm_acpi_methods, sizeof(struct tpm_softc),
74 };
75
76 devclass_t tpm_devclass;
77 DRIVER_MODULE(tpm, acpi, tpm_acpi_driver, tpm_devclass, NULL, NULL);
78