lib/tpm_api.c

   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
  14 u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode)
  15 {
  16         if (tpm_is_v1(dev)) {
  17                 return tpm1_startup(dev, mode);
  18         } else if (tpm_is_v2(dev)) {
  19                 enum tpm2_startup_types type;
  20
  21                 switch (mode) {
  22                 case TPM_ST_CLEAR:
  23                         type = TPM2_SU_CLEAR;
  24                         break;
  25                 case TPM_ST_STATE:
  26                         type = TPM2_SU_STATE;
  27                         break;
  28                 default:
  29                 case TPM_ST_DEACTIVATED:
  30                         return -EINVAL;
  31                 }
  32                 return tpm2_startup(dev, type);
  33         } else {
  34                 return -ENOSYS;
  35         }
  36 }
  37
  38 u32 tpm_resume(struct udevice *dev)
  39 {
  40         if (tpm_is_v1(dev))
  41                 return tpm1_startup(dev, TPM_ST_STATE);
  42         else if (tpm_is_v2(dev))
  43                 return tpm2_startup(dev, TPM2_SU_STATE);
  44         else
  45                 return -ENOSYS;
  46 }
  47
  48 u32 tpm_self_test_full(struct udevice *dev)
  49 {
  50         if (tpm_is_v1(dev))
  51                 return tpm1_self_test_full(dev);
  52         else if (tpm_is_v2(dev))
  53                 return tpm2_self_test(dev, TPMI_YES);
  54         else
  55                 return -ENOSYS;
  56 }
  57
  58 u32 tpm_continue_self_test(struct udevice *dev)
  59 {
  60         if (tpm_is_v1(dev))
  61                 return tpm1_continue_self_test(dev);
  62         else if (tpm_is_v2(dev))
  63                 return tpm2_self_test(dev, TPMI_NO);
  64         else
  65                 return -ENOSYS;
  66 }
  67
  68 u32 tpm_clear_and_reenable(struct udevice *dev)
  69 {
  70         u32 ret;
  71
  72         log_info("TPM: Clear and re-enable\n");
  73         ret = tpm_force_clear(dev);
  74         if (ret != TPM_SUCCESS) {
  75                 log_err("Can't initiate a force clear\n");
  76                 return ret;
  77         }
  78
  79         if (tpm_is_v1(dev)) {
  80                 ret = tpm1_physical_enable(dev);
  81                 if (ret != TPM_SUCCESS) {
  82                         log_err("TPM: Can't set enabled state\n");
  83                         return ret;
  84                 }
  85
  86                 ret = tpm1_physical_set_deactivated(dev, 0);
  87                 if (ret != TPM_SUCCESS) {
  88                         log_err("TPM: Can't set deactivated state\n");
  89                         return ret;
  90                 }
  91         }
  92
  93         return TPM_SUCCESS;
  94 }
  95
  96 u32 tpm_nv_enable_locking(struct udevice *dev)
  97 {
  98         if (tpm_is_v1(dev))
  99                 return tpm1_nv_define_space(dev, TPM_NV_INDEX_LOCK, 0, 0);
 100         else if (tpm_is_v2(dev))
 101                 return -ENOSYS;
 102         else
 103                 return -ENOSYS;
 104 }
 105
 106 u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count)
 107 {
 108         if (tpm_is_v1(dev))
 109                 return tpm1_nv_read_value(dev, index, data, count);
 110         else if (tpm_is_v2(dev))
 111                 return tpm2_nv_read_value(dev, index, data, count);
 112         else
 113                 return -ENOSYS;
 114 }
 115
 116 u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
 117                        u32 count)
 118 {
 119         if (tpm_is_v1(dev))
 120                 return tpm1_nv_write_value(dev, index, data, count);
 121         else if (tpm_is_v2(dev))
 122                 return tpm2_nv_write_value(dev, index, data, count);
 123         else
 124                 return -ENOSYS;
 125 }
 126
 127 u32 tpm_set_global_lock(struct udevice *dev)
 128 {
 129         return tpm_nv_write_value(dev, TPM_NV_INDEX_0, NULL, 0);
 130 }
 131
 132 u32 tpm_write_lock(struct udevice *dev, u32 index)
 133 {
 134         if (tpm_is_v1(dev))
 135                 return -ENOSYS;
 136         else if (tpm_is_v2(dev))
 137                 return tpm2_write_lock(dev, index);
 138         else
 139                 return -ENOSYS;
 140 }
 141
 142 u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
 143                    void *out_digest)
 144 {
 145         if (tpm_is_v1(dev))
 146                 return tpm1_extend(dev, index, in_digest, out_digest);
 147         else if (tpm_is_v2(dev))
 148                 return tpm2_pcr_extend(dev, index, TPM2_ALG_SHA256, in_digest,
 149                                        TPM2_DIGEST_LEN);
 150         else
 151                 return -ENOSYS;
 152 }
 153
 154 u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count)
 155 {
 156         if (tpm_is_v1(dev))
 157                 return tpm1_pcr_read(dev, index, data, count);
 158         else if (tpm_is_v2(dev))
 159                 return -ENOSYS;
 160         else
 161                 return -ENOSYS;
 162 }
 163
 164 u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence)
 165 {
 166         if (tpm_is_v1(dev))
 167                 return tpm1_tsc_physical_presence(dev, presence);
 168
 169         /*
 170          * Nothing to do on TPM2 for this; use platform hierarchy availability
 171          * instead.
 172          */
 173         else if (tpm_is_v2(dev))
 174                 return 0;
 175         else
 176                 return -ENOSYS;
 177 }
 178
 179 u32 tpm_finalise_physical_presence(struct udevice *dev)
 180 {
 181         if (tpm_is_v1(dev))
 182                 return tpm1_finalise_physical_presence(dev);
 183
 184         /* Nothing needs to be done with tpm2 */
 185         else if (tpm_is_v2(dev))
 186                 return 0;
 187         else
 188                 return -ENOSYS;
 189 }
 190
 191 u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count)
 192 {
 193         if (tpm_is_v1(dev))
 194                 return tpm1_read_pubek(dev, data, count);
 195         else if (tpm_is_v2(dev))
 196                 return -ENOSYS; /* not implemented yet */
 197         else
 198                 return -ENOSYS;
 199 }
 200
 201 u32 tpm_force_clear(struct udevice *dev)
 202 {
 203         if (tpm_is_v1(dev))
 204                 return tpm1_force_clear(dev);
 205         else if (tpm_is_v2(dev))
 206                 return tpm2_clear(dev, TPM2_RH_PLATFORM, NULL, 0);
 207         else
 208                 return -ENOSYS;
 209 }
 210
 211 u32 tpm_physical_enable(struct udevice *dev)
 212 {
 213         if (tpm_is_v1(dev))
 214                 return tpm1_physical_enable(dev);
 215
 216         /* Nothing needs to be done with tpm2 */
 217         else if (tpm_is_v2(dev))
 218                 return 0;
 219         else
 220                 return -ENOSYS;
 221 }
 222
 223 u32 tpm_physical_disable(struct udevice *dev)
 224 {
 225         if (tpm_is_v1(dev))
 226                 return tpm1_physical_disable(dev);
 227
 228         /* Nothing needs to be done with tpm2 */
 229         else if (tpm_is_v2(dev))
 230                 return 0;
 231         else
 232                 return -ENOSYS;
 233 }
 234
 235 u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state)
 236 {
 237         if (tpm_is_v1(dev))
 238                 return tpm1_physical_set_deactivated(dev, state);
 239         /* Nothing needs to be done with tpm2 */
 240         else if (tpm_is_v2(dev))
 241                 return 0;
 242         else
 243                 return -ENOSYS;
 244 }
 245
 246 u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
 247                        void *cap, size_t count)
 248 {
 249         if (tpm_is_v1(dev))
 250                 return tpm1_get_capability(dev, cap_area, sub_cap, cap, count);
 251         else if (tpm_is_v2(dev))
 252                 return tpm2_get_capability(dev, cap_area, sub_cap, cap, count);
 253         else
 254                 return -ENOSYS;
 255 }
 256
 257 u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm)
 258 {
 259         if (tpm_is_v1(dev))
 260                 return tpm1_get_permissions(dev, index, perm);
 261         else if (tpm_is_v2(dev))
 262                 return -ENOSYS; /* not implemented yet */
 263         else
 264                 return -ENOSYS;
 265 }
 266
 267 u32 tpm_get_random(struct udevice *dev, void *data, u32 count)
 268 {
 269         if (tpm_is_v1(dev))
 270                 return tpm1_get_random(dev, data, count);
 271         else if (tpm_is_v2(dev))
 272                 return tpm2_get_random(dev, data, count);
 273
 274         return -ENOSYS;
 275 }