1/*
2 * Copyright (c) 2023 Juniper Networks, Inc.
3 * All rights reserved.
4 */
5/*-
6 * Copyright (c) 2018 Stormshield.
7 * Copyright (c) 2018 Semihalf.
8 * All rights reserved.
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
28 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/* Based *heavily* on the tpm_tis driver. */
33
34#include "opt_platform.h"
35
36#include <sys/cdefs.h>
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/bus.h>
40#include <sys/endian.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/module.h>
44#include <sys/sx.h>
45
46#include <dev/spibus/spi.h>
47#include <dev/tpm/tpm20.h>
48
49#include "spibus_if.h"
50#include "tpm_if.h"
51
52#include <dev/ofw/ofw_bus.h>
53#include <dev/ofw/ofw_bus_subr.h>
54
55static struct ofw_compat_data compatible_data[] = {
56	{"infineon,slb9670",	true},
57	{"tcg,tpm_tis-spi",	true},
58	{NULL,			false}
59};
60
61static int
62tpm_spi_probe(device_t dev)
63{
64	if (!ofw_bus_status_okay(dev))
65		return (ENXIO);
66
67	if (!ofw_bus_search_compatible(dev, compatible_data)->ocd_data)
68		return (ENXIO);
69
70	device_set_desc(dev, "Trusted Platform Module 2.0, SPI Mode");
71
72	return (BUS_PROBE_DEFAULT);
73}
74
75static device_method_t tpm_methods[] = {
76	DEVMETHOD(device_probe,		tpm_spi_probe),
77	DEVMETHOD_END
78};
79
80DEFINE_CLASS_2(tpm, tpm_driver, tpm_methods, sizeof(struct tpm_sc),
81    tpmtis_driver, tpm_spi_driver);
82
83#if __FreeBSD_version < 1400067
84static devclass_t tpm_devclass;
85
86DRIVER_MODULE(tpm, spibus, tpm_driver, tpm_devclass, NULL, NULL);
87#else
88DRIVER_MODULE(tpm, spibus, tpm_driver, NULL, NULL);
89#endif
90MODULE_DEPEND(tpm, spibus, 1, 1, 1);
91MODULE_VERSION(tpm, 1);
92