1/*-
2 * Copyright (c) 2023 Juniper Networks, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
22 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
23 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28#include <sys/types.h>
29#include <sys/bus.h>
30#include "tpm_if.h"
31#include "tpm20.h"
32
33/* Override accessors */
34static uint8_t
35tpm_read_1(device_t dev, bus_size_t off)
36{
37	struct tpm_sc *sc = device_get_softc(dev);
38
39	return (bus_read_1(sc->mem_res, off));
40}
41
42static uint32_t
43tpm_read_4(device_t dev, bus_size_t off)
44{
45	struct tpm_sc *sc = device_get_softc(dev);
46
47	return (bus_read_4(sc->mem_res, off));
48}
49
50/*
51 * Only i386 is missing bus_space_read_8.
52 */
53#ifndef __i386__
54static uint64_t
55tpm_read_8(device_t dev, bus_size_t off)
56{
57	struct tpm_sc *sc = device_get_softc(dev);
58
59	return (bus_read_8(sc->mem_res, off));
60}
61#endif
62
63static void
64tpm_write_1(device_t dev, bus_size_t off, uint8_t val)
65{
66	struct tpm_sc *sc = device_get_softc(dev);
67
68	bus_write_1(sc->mem_res, off, val);
69}
70
71static void
72tpm_write_4(device_t dev, bus_size_t off, uint32_t val)
73{
74	struct tpm_sc *sc = device_get_softc(dev);
75
76	bus_write_4(sc->mem_res, off, val);
77}
78
79static void
80tpm_write_barrier(device_t dev, bus_size_t off, bus_size_t length)
81{
82	struct tpm_sc *sc = device_get_softc(dev);
83
84	bus_barrier(sc->mem_res, off, length, BUS_SPACE_BARRIER_WRITE);
85}
86
87static device_method_t tpm_bus_methods[] = {
88	DEVMETHOD(tpm_read_1,	tpm_read_1),
89	DEVMETHOD(tpm_read_4,	tpm_read_4),
90#ifndef __i386__
91	DEVMETHOD(tpm_read_8,	tpm_read_8),
92#endif
93	DEVMETHOD(tpm_write_1,	tpm_write_1),
94	DEVMETHOD(tpm_write_4,	tpm_write_4),
95	DEVMETHOD(tpm_write_barrier,	tpm_write_barrier),
96	DEVMETHOD_END
97};
98
99DEFINE_CLASS_0(tpm_lbc, tpm_bus_driver, tpm_bus_methods, sizeof(struct tpm_sc));
100