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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2019 Google LLC
4 */
5
6#include <dm.h>
7#include <log.h>
8#include <tpm_api.h>
9#include <tpm-v1.h>
10#include <tpm-v2.h>
11#include <tpm_api.h>
12
13u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
14{
15 if (tpm_is_v1(dev)) {
16 return tpm1_startup(dev, mode);
17 } else if (tpm_is_v2(dev)) {
18 enum tpm2_startup_types type;
19
20 switch (mode) {
21 case TPM_ST_CLEAR:
22 type = TPM2_SU_CLEAR;
23 break;
24 case TPM_ST_STATE:
25 type = TPM2_SU_STATE;
26 break;
27 default:
28 case TPM_ST_DEACTIVATED:
29 return -EINVAL;
30 }
31 return tpm2_startup(dev, true, type);
32 } else {
33 return -ENOSYS;
34 }
35}
36
37u32 tpm_auto_start(struct udevice *dev)
38{
39 u32 rc;
40
41 /*
42 * the tpm_init() will return -EBUSY if the init has already happened
43 * The selftest and startup code can run multiple times with no side
44 * effects
45 */
46 rc = tpm_init(dev);
47 if (rc && rc != -EBUSY)
48 return rc;
49
50 if (tpm_is_v1(dev))
51 return tpm1_auto_start(dev);
52 else if (tpm_is_v2(dev))
53 return tpm2_auto_start(dev);
54 else
55 return -ENOSYS;
56}
57
58u32 tpm_resume(struct udevice *dev)
59{
60 if (tpm_is_v1(dev))
61 return tpm1_startup(dev, TPM_ST_STATE);
62 else if (tpm_is_v2(dev))
63 return tpm2_startup(dev, true, TPM2_SU_STATE);
64 else
65 return -ENOSYS;
66}
67
68u32 tpm_self_test_full(struct udevice *dev)
69{
70 if (tpm_is_v1(dev))
71 return tpm1_self_test_full(dev);
72 else if (tpm_is_v2(dev))
73 return tpm2_self_test(dev, TPMI_YES);
74 else
75 return -ENOSYS;
76}
77
78u32 tpm_continue_self_test(struct udevice *dev)
79{
80 if (tpm_is_v1(dev))
81 return tpm1_continue_self_test(dev);
82 else if (tpm_is_v2(dev))
83 return tpm2_self_test(dev, TPMI_NO);
84 else
85 return -ENOSYS;
86}
87
88u32 tpm_clear_and_reenable(struct udevice *dev)
89{
90 u32 ret;
91
92 log_info("TPM: Clear and re-enable\n");
93 ret = tpm_force_clear(dev);
94 if (ret != TPM_SUCCESS) {
95 log_err("Can't initiate a force clear\n");
96 return ret;
97 }
98
99 if (tpm_is_v1(dev)) {
100 ret = tpm1_physical_enable(dev);
101 if (ret != TPM_SUCCESS) {
102 log_err("TPM: Can't set enabled state\n");
103 return ret;
104 }
105
106 ret = tpm1_physical_set_deactivated(dev, 0);
107 if (ret != TPM_SUCCESS) {
108 log_err("TPM: Can't set deactivated state\n");
109 return ret;
110 }
111 }
112
113 return TPM_SUCCESS;
114}
115
116u32 tpm_nv_enable_locking(struct udevice *dev)
117{
118 if (tpm_is_v1(dev))
119 return tpm1_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
120 else if (tpm_is_v2(dev))
121 return -ENOSYS;
122 else
123 return -ENOSYS;
124}
125
126u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
127{
128 if (tpm_is_v1(dev))
129 return tpm1_nv_read_value(dev, index, data, count);
130 else if (tpm_is_v2(dev))
131 return tpm2_nv_read_value(dev, index, data, count);
132 else
133 return -ENOSYS;
134}
135
136u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
137 u32 count)
138{
139 if (tpm_is_v1(dev))
140 return tpm1_nv_write_value(dev, index, data, count);
141 else if (tpm_is_v2(dev))
142 return tpm2_nv_write_value(dev, index, data, count);
143 else
144 return -ENOSYS;
145}
146
147u32 tpm_set_global_lock(struct udevice *dev)
148{
149 return tpm_nv_write_value(dev, TPM_NV_INDEX_0, NULL, 0);
150}
151
152u32 tpm_write_lock(struct udevice *dev, u32 index)
153{
154 if (tpm_is_v1(dev))
155 return -ENOSYS;
156 else if (tpm_is_v2(dev))
157 return tpm2_write_lock(dev, index);
158 else
159 return -ENOSYS;
160}
161
162u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
163 uint size, void *out_digest, const char *name)
164{
165 if (tpm_is_v1(dev)) {
166 return tpm1_extend(dev, index, in_digest, out_digest);
167 } else if (tpm_is_v2(dev)) {
168 return tpm2_pcr_extend(dev, index, TPM2_ALG_SHA256, in_digest,
169 TPM2_DIGEST_LEN);
170 /* @name is ignored as we do not support the TPM log here */
171 } else {
172 return -ENOSYS;
173 }
174}
175
176u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
177{
178 if (tpm_is_v1(dev))
179 return tpm1_pcr_read(dev, index, data, count);
180 else if (tpm_is_v2(dev))
181 return -ENOSYS;
182 else
183 return -ENOSYS;
184}
185
186u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
187{
188 if (tpm_is_v1(dev))
189 return tpm1_tsc_physical_presence(dev, presence);
190
191 /*
192 * Nothing to do on TPM2 for this; use platform hierarchy availability
193 * instead.
194 */
195 else if (tpm_is_v2(dev))
196 return 0;
197 else
198 return -ENOSYS;
199}
200
201u32 tpm_finalise_physical_presence(struct udevice *dev)
202{
203 if (tpm_is_v1(dev))
204 return tpm1_finalise_physical_presence(dev);
205
206 /* Nothing needs to be done with tpm2 */
207 else if (tpm_is_v2(dev))
208 return 0;
209 else
210 return -ENOSYS;
211}
212
213u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
214{
215 if (tpm_is_v1(dev))
216 return tpm1_read_pubek(dev, data, count);
217 else if (tpm_is_v2(dev))
218 return -ENOSYS; /* not implemented yet */
219 else
220 return -ENOSYS;
221}
222
223u32 tpm_force_clear(struct udevice *dev)
224{
225 if (tpm_is_v1(dev))
226 return tpm1_force_clear(dev);
227 else if (tpm_is_v2(dev))
228 return tpm2_clear(dev, TPM2_RH_PLATFORM, NULL, 0);
229 else
230 return -ENOSYS;
231}
232
233u32 tpm_physical_enable(struct udevice *dev)
234{
235 if (tpm_is_v1(dev))
236 return tpm1_physical_enable(dev);
237
238 /* Nothing needs to be done with tpm2 */
239 else if (tpm_is_v2(dev))
240 return 0;
241 else
242 return -ENOSYS;
243}
244
245u32 tpm_physical_disable(struct udevice *dev)
246{
247 if (tpm_is_v1(dev))
248 return tpm1_physical_disable(dev);
249
250 /* Nothing needs to be done with tpm2 */
251 else if (tpm_is_v2(dev))
252 return 0;
253 else
254 return -ENOSYS;
255}
256
257u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
258{
259 if (tpm_is_v1(dev))
260 return tpm1_physical_set_deactivated(dev, state);
261 /* Nothing needs to be done with tpm2 */
262 else if (tpm_is_v2(dev))
263 return 0;
264 else
265 return -ENOSYS;
266}
267
268u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
269 void *cap, size_t count)
270{
271 if (tpm_is_v1(dev))
272 return tpm1_get_capability(dev, cap_area, sub_cap, cap, count);
273 else if (tpm_is_v2(dev))
274 return tpm2_get_capability(dev, cap_area, sub_cap, cap, count);
275 else
276 return -ENOSYS;
277}
278
279u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
280{
281 if (tpm_is_v1(dev))
282 return tpm1_get_permissions(dev, index, perm);
283 else if (tpm_is_v2(dev))
284 return -ENOSYS; /* not implemented yet */
285 else
286 return -ENOSYS;
287}
288
289u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
290{
291 if (tpm_is_v1(dev))
292 return tpm1_get_random(dev, data, count);
293 else if (tpm_is_v2(dev))
294 return tpm2_get_random(dev, data, count);
295
296 return -ENOSYS;
297}