1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2019 Google LLC
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <log.h>
9 #include <tpm_api.h>
10 #include <tpm-v1.h>
11 #include <tpm-v2.h>
12 #include <tpm_api.h>
13
is_tpm1(struct udevice * dev)14 static bool is_tpm1(struct udevice *dev)
15 {
16 return IS_ENABLED(CONFIG_TPM_V1) && tpm_get_version(dev) == TPM_V1;
17 }
18
is_tpm2(struct udevice * dev)19 static bool is_tpm2(struct udevice *dev)
20 {
21 return IS_ENABLED(CONFIG_TPM_V2) && tpm_get_version(dev) == TPM_V2;
22 }
23
tpm_startup(struct udevice * dev,enum tpm_startup_type mode)24 u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
25 {
26 if (is_tpm1(dev)) {
27 return tpm1_startup(dev, mode);
28 } else if (is_tpm2(dev)) {
29 enum tpm2_startup_types type;
30
31 switch (mode) {
32 case TPM_ST_CLEAR:
33 type = TPM2_SU_CLEAR;
34 break;
35 case TPM_ST_STATE:
36 type = TPM2_SU_STATE;
37 break;
38 default:
39 case TPM_ST_DEACTIVATED:
40 return -EINVAL;
41 }
42 return tpm2_startup(dev, type);
43 } else {
44 return -ENOSYS;
45 }
46 }
47
tpm_resume(struct udevice * dev)48 u32 tpm_resume(struct udevice *dev)
49 {
50 if (is_tpm1(dev))
51 return tpm1_startup(dev, TPM_ST_STATE);
52 else if (is_tpm2(dev))
53 return tpm2_startup(dev, TPM2_SU_STATE);
54 else
55 return -ENOSYS;
56 }
57
tpm_self_test_full(struct udevice * dev)58 u32 tpm_self_test_full(struct udevice *dev)
59 {
60 if (is_tpm1(dev))
61 return tpm1_self_test_full(dev);
62 else if (is_tpm2(dev))
63 return tpm2_self_test(dev, TPMI_YES);
64 else
65 return -ENOSYS;
66 }
67
tpm_continue_self_test(struct udevice * dev)68 u32 tpm_continue_self_test(struct udevice *dev)
69 {
70 if (is_tpm1(dev))
71 return tpm1_continue_self_test(dev);
72 else if (is_tpm2(dev))
73 return tpm2_self_test(dev, TPMI_NO);
74 else
75 return -ENOSYS;
76 }
77
tpm_clear_and_reenable(struct udevice * dev)78 u32 tpm_clear_and_reenable(struct udevice *dev)
79 {
80 u32 ret;
81
82 log_info("TPM: Clear and re-enable\n");
83 ret = tpm_force_clear(dev);
84 if (ret != TPM_SUCCESS) {
85 log_err("Can't initiate a force clear\n");
86 return ret;
87 }
88
89 if (is_tpm1(dev)) {
90 ret = tpm1_physical_enable(dev);
91 if (ret != TPM_SUCCESS) {
92 log_err("TPM: Can't set enabled state\n");
93 return ret;
94 }
95
96 ret = tpm1_physical_set_deactivated(dev, 0);
97 if (ret != TPM_SUCCESS) {
98 log_err("TPM: Can't set deactivated state\n");
99 return ret;
100 }
101 }
102
103 return TPM_SUCCESS;
104 }
105
tpm_nv_enable_locking(struct udevice * dev)106 u32 tpm_nv_enable_locking(struct udevice *dev)
107 {
108 if (is_tpm1(dev))
109 return tpm1_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
110 else if (is_tpm2(dev))
111 return -ENOSYS;
112 else
113 return -ENOSYS;
114 }
115
tpm_nv_read_value(struct udevice * dev,u32 index,void * data,u32 count)116 u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
117 {
118 if (is_tpm1(dev))
119 return tpm1_nv_read_value(dev, index, data, count);
120 else if (is_tpm2(dev))
121 return tpm2_nv_read_value(dev, index, data, count);
122 else
123 return -ENOSYS;
124 }
125
tpm_nv_write_value(struct udevice * dev,u32 index,const void * data,u32 count)126 u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
127 u32 count)
128 {
129 if (is_tpm1(dev))
130 return tpm1_nv_write_value(dev, index, data, count);
131 else if (is_tpm2(dev))
132 return tpm2_nv_write_value(dev, index, data, count);
133 else
134 return -ENOSYS;
135 }
136
tpm_set_global_lock(struct udevice * dev)137 u32 tpm_set_global_lock(struct udevice *dev)
138 {
139 return tpm_nv_write_value(dev, TPM_NV_INDEX_0, NULL, 0);
140 }
141
tpm_write_lock(struct udevice * dev,u32 index)142 u32 tpm_write_lock(struct udevice *dev, u32 index)
143 {
144 if (is_tpm1(dev))
145 return -ENOSYS;
146 else if (is_tpm2(dev))
147 return tpm2_write_lock(dev, index);
148 else
149 return -ENOSYS;
150 }
151
tpm_pcr_extend(struct udevice * dev,u32 index,const void * in_digest,void * out_digest)152 u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
153 void *out_digest)
154 {
155 if (is_tpm1(dev))
156 return tpm1_extend(dev, index, in_digest, out_digest);
157 else if (is_tpm2(dev))
158 return tpm2_pcr_extend(dev, index, TPM2_ALG_SHA256, in_digest,
159 TPM2_DIGEST_LEN);
160 else
161 return -ENOSYS;
162 }
163
tpm_pcr_read(struct udevice * dev,u32 index,void * data,size_t count)164 u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
165 {
166 if (is_tpm1(dev))
167 return tpm1_pcr_read(dev, index, data, count);
168 else if (is_tpm2(dev))
169 return -ENOSYS;
170 else
171 return -ENOSYS;
172 }
173
tpm_tsc_physical_presence(struct udevice * dev,u16 presence)174 u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
175 {
176 if (is_tpm1(dev))
177 return tpm1_tsc_physical_presence(dev, presence);
178
179 /*
180 * Nothing to do on TPM2 for this; use platform hierarchy availability
181 * instead.
182 */
183 else if (is_tpm2(dev))
184 return 0;
185 else
186 return -ENOSYS;
187 }
188
tpm_finalise_physical_presence(struct udevice * dev)189 u32 tpm_finalise_physical_presence(struct udevice *dev)
190 {
191 if (is_tpm1(dev))
192 return tpm1_finalise_physical_presence(dev);
193
194 /* Nothing needs to be done with tpm2 */
195 else if (is_tpm2(dev))
196 return 0;
197 else
198 return -ENOSYS;
199 }
200
tpm_read_pubek(struct udevice * dev,void * data,size_t count)201 u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
202 {
203 if (is_tpm1(dev))
204 return tpm1_read_pubek(dev, data, count);
205 else if (is_tpm2(dev))
206 return -ENOSYS; /* not implemented yet */
207 else
208 return -ENOSYS;
209 }
210
tpm_force_clear(struct udevice * dev)211 u32 tpm_force_clear(struct udevice *dev)
212 {
213 if (is_tpm1(dev))
214 return tpm1_force_clear(dev);
215 else if (is_tpm2(dev))
216 return tpm2_clear(dev, TPM2_RH_PLATFORM, NULL, 0);
217 else
218 return -ENOSYS;
219 }
220
tpm_physical_enable(struct udevice * dev)221 u32 tpm_physical_enable(struct udevice *dev)
222 {
223 if (is_tpm1(dev))
224 return tpm1_physical_enable(dev);
225
226 /* Nothing needs to be done with tpm2 */
227 else if (is_tpm2(dev))
228 return 0;
229 else
230 return -ENOSYS;
231 }
232
tpm_physical_disable(struct udevice * dev)233 u32 tpm_physical_disable(struct udevice *dev)
234 {
235 if (is_tpm1(dev))
236 return tpm1_physical_disable(dev);
237
238 /* Nothing needs to be done with tpm2 */
239 else if (is_tpm2(dev))
240 return 0;
241 else
242 return -ENOSYS;
243 }
244
tpm_physical_set_deactivated(struct udevice * dev,u8 state)245 u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
246 {
247 if (is_tpm1(dev))
248 return tpm1_physical_set_deactivated(dev, state);
249 /* Nothing needs to be done with tpm2 */
250 else if (is_tpm2(dev))
251 return 0;
252 else
253 return -ENOSYS;
254 }
255
tpm_get_capability(struct udevice * dev,u32 cap_area,u32 sub_cap,void * cap,size_t count)256 u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
257 void *cap, size_t count)
258 {
259 if (is_tpm1(dev))
260 return tpm1_get_capability(dev, cap_area, sub_cap, cap, count);
261 else if (is_tpm2(dev))
262 return tpm2_get_capability(dev, cap_area, sub_cap, cap, count);
263 else
264 return -ENOSYS;
265 }
266
tpm_get_permissions(struct udevice * dev,u32 index,u32 * perm)267 u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
268 {
269 if (is_tpm1(dev))
270 return tpm1_get_permissions(dev, index, perm);
271 else if (is_tpm2(dev))
272 return -ENOSYS; /* not implemented yet */
273 else
274 return -ENOSYS;
275 }
276
tpm_get_random(struct udevice * dev,void * data,u32 count)277 u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
278 {
279 if (is_tpm1(dev))
280 return tpm1_get_random(dev, data, count);
281 else if (is_tpm2(dev))
282 return -ENOSYS; /* not implemented yet */
283 else
284 return -ENOSYS;
285 }
286