xref: /freebsd/sys/dev/tpm/tpm_acpi.c (revision 2b15cb3d0922bd70ea592f0da9b4a5b167f4d53f)
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 #include <sys/cdefs.h>
19 __FBSDID("$FreeBSD$");
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 <machine/bus.h>
33 #include <sys/rman.h>
34 #include <machine/resource.h>
35 
36 #include <machine/md_var.h>
37 
38 #include <isa/isareg.h>
39 #include <isa/isavar.h>
40 #include "tpmvar.h"
41 
42 #include "opt_acpi.h"
43 #include <contrib/dev/acpica/include/acpi.h>
44 #include <contrib/dev/acpica/include/accommon.h>
45 #include <dev/acpica/acpivar.h>
46 
47 
48 
49 char *tpm_ids[] = {"ATM1200",  "BCM0102", "INTC0102", "SNO3504", "WEC1000",
50     "PNP0C31", NULL};
51 
52 static int
53 tpm_acpi_probe(device_t dev)
54 {
55 	if (ACPI_ID_PROBE(device_get_parent(dev), dev, tpm_ids) != NULL) {
56 		device_set_desc(dev, "Trusted Platform Module");
57 		return BUS_PROBE_DEFAULT;
58 	}
59 
60 	return ENXIO;
61 }
62 
63 static device_method_t tpm_acpi_methods[] = {
64 #if 0
65 	/*In some case, TPM existance is found only in TPCA header*/
66 	DEVMETHOD(device_identify,	tpm_acpi_identify),
67 #endif
68 
69 	DEVMETHOD(device_probe,		tpm_acpi_probe),
70 	DEVMETHOD(device_attach,	tpm_attach),
71 	DEVMETHOD(device_detach,	tpm_detach),
72 	DEVMETHOD(device_suspend,	tpm_suspend),
73 	DEVMETHOD(device_resume,	tpm_resume),
74 	{ 0, 0 }
75 };
76 static driver_t tpm_acpi_driver = {
77 	"tpm", tpm_acpi_methods, sizeof(struct tpm_softc),
78 };
79 
80 devclass_t tpm_devclass;
81 DRIVER_MODULE(tpm, acpi, tpm_acpi_driver, tpm_devclass, 0, 0);
82