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 */
34 static uint8_t
tpm_read_1(device_t dev,bus_size_t off)35 tpm_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
42 static uint32_t
tpm_read_4(device_t dev,bus_size_t off)43 tpm_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__
54 static uint64_t
tpm_read_8(device_t dev,bus_size_t off)55 tpm_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
63 static void
tpm_write_1(device_t dev,bus_size_t off,uint8_t val)64 tpm_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
71 static void
tpm_write_4(device_t dev,bus_size_t off,uint32_t val)72 tpm_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
79 static void
tpm_write_barrier(device_t dev,bus_size_t off,bus_size_t length)80 tpm_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
87 static 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
99 DEFINE_CLASS_0(tpm_lbc, tpm_bus_driver, tpm_bus_methods, sizeof(struct tpm_sc));
100