Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Infineon Technologies |
| 3 | * |
| 4 | * Authors: |
| 5 | * Peter Huewe <huewe.external@infineon.com> |
| 6 | * |
| 7 | * Description: |
| 8 | * Device driver for TCG/TCPA TPM (trusted platform module). |
| 9 | * Specifications at www.trustedcomputinggroup.org |
| 10 | * |
| 11 | * It is based on the Linux kernel driver tpm.c from Leendert van |
| 12 | * Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall. |
| 13 | * |
| 14 | * Version: 2.1.1 |
| 15 | * |
| 16 | * See file CREDITS for list of people who contributed to this |
| 17 | * project. |
| 18 | * |
| 19 | * This program is free software; you can redistribute it and/or |
| 20 | * modify it under the terms of the GNU General Public License as |
| 21 | * published by the Free Software Foundation, version 2 of the |
| 22 | * License. |
| 23 | * |
| 24 | * This program is distributed in the hope that it will be useful, |
| 25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 27 | * GNU General Public License for more details. |
| 28 | * |
| 29 | * You should have received a copy of the GNU General Public License |
| 30 | * along with this program; if not, write to the Free Software |
| 31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 32 | * MA 02111-1307 USA |
| 33 | */ |
| 34 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 35 | #include <config.h> |
| 36 | #include <common.h> |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 37 | #include <dm.h> |
Masahiro Yamada | e722852 | 2014-11-26 16:00:58 +0900 | [diff] [blame] | 38 | #include <linux/compiler.h> |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 39 | #include <fdtdec.h> |
| 40 | #include <i2c.h> |
| 41 | #include <tpm.h> |
| 42 | #include <asm-generic/errno.h> |
| 43 | #include <linux/types.h> |
| 44 | #include <linux/unaligned/be_byteshift.h> |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 45 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 46 | #include "tpm_private.h" |
| 47 | |
| 48 | DECLARE_GLOBAL_DATA_PTR; |
| 49 | |
| 50 | /* TPM configuration */ |
| 51 | struct tpm { |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 52 | #ifdef CONFIG_DM_I2C |
| 53 | struct udevice *dev; |
| 54 | #else |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 55 | int i2c_bus; |
| 56 | int slave_addr; |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 57 | int old_bus; |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 58 | #endif |
| 59 | char inited; |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 60 | } tpm; |
| 61 | |
| 62 | /* Global structure for tpm chip data */ |
| 63 | static struct tpm_chip g_chip; |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 64 | |
| 65 | enum tpm_duration { |
| 66 | TPM_SHORT = 0, |
| 67 | TPM_MEDIUM = 1, |
| 68 | TPM_LONG = 2, |
| 69 | TPM_UNDEFINED, |
| 70 | }; |
| 71 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 72 | /* Extended error numbers from linux (see errno.h) */ |
| 73 | #define ECANCELED 125 /* Operation Canceled */ |
| 74 | |
| 75 | /* Timer frequency. Corresponds to msec timer resolution*/ |
| 76 | #define HZ 1000 |
| 77 | |
| 78 | #define TPM_MAX_ORDINAL 243 |
| 79 | #define TPM_MAX_PROTECTED_ORDINAL 12 |
| 80 | #define TPM_PROTECTED_ORDINAL_MASK 0xFF |
| 81 | |
| 82 | #define TPM_CMD_COUNT_BYTE 2 |
| 83 | #define TPM_CMD_ORDINAL_BYTE 6 |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 84 | |
| 85 | /* |
| 86 | * Array with one entry per ordinal defining the maximum amount |
| 87 | * of time the chip could take to return the result. The ordinal |
| 88 | * designation of short, medium or long is defined in a table in |
| 89 | * TCG Specification TPM Main Part 2 TPM Structures Section 17. The |
| 90 | * values of the SHORT, MEDIUM, and LONG durations are retrieved |
| 91 | * from the chip during initialization with a call to tpm_get_timeouts. |
| 92 | */ |
| 93 | static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = { |
| 94 | TPM_UNDEFINED, /* 0 */ |
| 95 | TPM_UNDEFINED, |
| 96 | TPM_UNDEFINED, |
| 97 | TPM_UNDEFINED, |
| 98 | TPM_UNDEFINED, |
| 99 | TPM_UNDEFINED, /* 5 */ |
| 100 | TPM_UNDEFINED, |
| 101 | TPM_UNDEFINED, |
| 102 | TPM_UNDEFINED, |
| 103 | TPM_UNDEFINED, |
| 104 | TPM_SHORT, /* 10 */ |
| 105 | TPM_SHORT, |
| 106 | }; |
| 107 | |
| 108 | static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = { |
| 109 | TPM_UNDEFINED, /* 0 */ |
| 110 | TPM_UNDEFINED, |
| 111 | TPM_UNDEFINED, |
| 112 | TPM_UNDEFINED, |
| 113 | TPM_UNDEFINED, |
| 114 | TPM_UNDEFINED, /* 5 */ |
| 115 | TPM_UNDEFINED, |
| 116 | TPM_UNDEFINED, |
| 117 | TPM_UNDEFINED, |
| 118 | TPM_UNDEFINED, |
| 119 | TPM_SHORT, /* 10 */ |
| 120 | TPM_SHORT, |
| 121 | TPM_MEDIUM, |
| 122 | TPM_LONG, |
| 123 | TPM_LONG, |
| 124 | TPM_MEDIUM, /* 15 */ |
| 125 | TPM_SHORT, |
| 126 | TPM_SHORT, |
| 127 | TPM_MEDIUM, |
| 128 | TPM_LONG, |
| 129 | TPM_SHORT, /* 20 */ |
| 130 | TPM_SHORT, |
| 131 | TPM_MEDIUM, |
| 132 | TPM_MEDIUM, |
| 133 | TPM_MEDIUM, |
| 134 | TPM_SHORT, /* 25 */ |
| 135 | TPM_SHORT, |
| 136 | TPM_MEDIUM, |
| 137 | TPM_SHORT, |
| 138 | TPM_SHORT, |
| 139 | TPM_MEDIUM, /* 30 */ |
| 140 | TPM_LONG, |
| 141 | TPM_MEDIUM, |
| 142 | TPM_SHORT, |
| 143 | TPM_SHORT, |
| 144 | TPM_SHORT, /* 35 */ |
| 145 | TPM_MEDIUM, |
| 146 | TPM_MEDIUM, |
| 147 | TPM_UNDEFINED, |
| 148 | TPM_UNDEFINED, |
| 149 | TPM_MEDIUM, /* 40 */ |
| 150 | TPM_LONG, |
| 151 | TPM_MEDIUM, |
| 152 | TPM_SHORT, |
| 153 | TPM_SHORT, |
| 154 | TPM_SHORT, /* 45 */ |
| 155 | TPM_SHORT, |
| 156 | TPM_SHORT, |
| 157 | TPM_SHORT, |
| 158 | TPM_LONG, |
| 159 | TPM_MEDIUM, /* 50 */ |
| 160 | TPM_MEDIUM, |
| 161 | TPM_UNDEFINED, |
| 162 | TPM_UNDEFINED, |
| 163 | TPM_UNDEFINED, |
| 164 | TPM_UNDEFINED, /* 55 */ |
| 165 | TPM_UNDEFINED, |
| 166 | TPM_UNDEFINED, |
| 167 | TPM_UNDEFINED, |
| 168 | TPM_UNDEFINED, |
| 169 | TPM_MEDIUM, /* 60 */ |
| 170 | TPM_MEDIUM, |
| 171 | TPM_MEDIUM, |
| 172 | TPM_SHORT, |
| 173 | TPM_SHORT, |
| 174 | TPM_MEDIUM, /* 65 */ |
| 175 | TPM_UNDEFINED, |
| 176 | TPM_UNDEFINED, |
| 177 | TPM_UNDEFINED, |
| 178 | TPM_UNDEFINED, |
| 179 | TPM_SHORT, /* 70 */ |
| 180 | TPM_SHORT, |
| 181 | TPM_UNDEFINED, |
| 182 | TPM_UNDEFINED, |
| 183 | TPM_UNDEFINED, |
| 184 | TPM_UNDEFINED, /* 75 */ |
| 185 | TPM_UNDEFINED, |
| 186 | TPM_UNDEFINED, |
| 187 | TPM_UNDEFINED, |
| 188 | TPM_UNDEFINED, |
| 189 | TPM_LONG, /* 80 */ |
| 190 | TPM_UNDEFINED, |
| 191 | TPM_MEDIUM, |
| 192 | TPM_LONG, |
| 193 | TPM_SHORT, |
| 194 | TPM_UNDEFINED, /* 85 */ |
| 195 | TPM_UNDEFINED, |
| 196 | TPM_UNDEFINED, |
| 197 | TPM_UNDEFINED, |
| 198 | TPM_UNDEFINED, |
| 199 | TPM_SHORT, /* 90 */ |
| 200 | TPM_SHORT, |
| 201 | TPM_SHORT, |
| 202 | TPM_SHORT, |
| 203 | TPM_SHORT, |
| 204 | TPM_UNDEFINED, /* 95 */ |
| 205 | TPM_UNDEFINED, |
| 206 | TPM_UNDEFINED, |
| 207 | TPM_UNDEFINED, |
| 208 | TPM_UNDEFINED, |
| 209 | TPM_MEDIUM, /* 100 */ |
| 210 | TPM_SHORT, |
| 211 | TPM_SHORT, |
| 212 | TPM_UNDEFINED, |
| 213 | TPM_UNDEFINED, |
| 214 | TPM_UNDEFINED, /* 105 */ |
| 215 | TPM_UNDEFINED, |
| 216 | TPM_UNDEFINED, |
| 217 | TPM_UNDEFINED, |
| 218 | TPM_UNDEFINED, |
| 219 | TPM_SHORT, /* 110 */ |
| 220 | TPM_SHORT, |
| 221 | TPM_SHORT, |
| 222 | TPM_SHORT, |
| 223 | TPM_SHORT, |
| 224 | TPM_SHORT, /* 115 */ |
| 225 | TPM_SHORT, |
| 226 | TPM_SHORT, |
| 227 | TPM_UNDEFINED, |
| 228 | TPM_UNDEFINED, |
| 229 | TPM_LONG, /* 120 */ |
| 230 | TPM_LONG, |
| 231 | TPM_MEDIUM, |
| 232 | TPM_UNDEFINED, |
| 233 | TPM_SHORT, |
| 234 | TPM_SHORT, /* 125 */ |
| 235 | TPM_SHORT, |
| 236 | TPM_LONG, |
| 237 | TPM_SHORT, |
| 238 | TPM_SHORT, |
| 239 | TPM_SHORT, /* 130 */ |
| 240 | TPM_MEDIUM, |
| 241 | TPM_UNDEFINED, |
| 242 | TPM_SHORT, |
| 243 | TPM_MEDIUM, |
| 244 | TPM_UNDEFINED, /* 135 */ |
| 245 | TPM_UNDEFINED, |
| 246 | TPM_UNDEFINED, |
| 247 | TPM_UNDEFINED, |
| 248 | TPM_UNDEFINED, |
| 249 | TPM_SHORT, /* 140 */ |
| 250 | TPM_SHORT, |
| 251 | TPM_UNDEFINED, |
| 252 | TPM_UNDEFINED, |
| 253 | TPM_UNDEFINED, |
| 254 | TPM_UNDEFINED, /* 145 */ |
| 255 | TPM_UNDEFINED, |
| 256 | TPM_UNDEFINED, |
| 257 | TPM_UNDEFINED, |
| 258 | TPM_UNDEFINED, |
| 259 | TPM_SHORT, /* 150 */ |
| 260 | TPM_MEDIUM, |
| 261 | TPM_MEDIUM, |
| 262 | TPM_SHORT, |
| 263 | TPM_SHORT, |
| 264 | TPM_UNDEFINED, /* 155 */ |
| 265 | TPM_UNDEFINED, |
| 266 | TPM_UNDEFINED, |
| 267 | TPM_UNDEFINED, |
| 268 | TPM_UNDEFINED, |
| 269 | TPM_SHORT, /* 160 */ |
| 270 | TPM_SHORT, |
| 271 | TPM_SHORT, |
| 272 | TPM_SHORT, |
| 273 | TPM_UNDEFINED, |
| 274 | TPM_UNDEFINED, /* 165 */ |
| 275 | TPM_UNDEFINED, |
| 276 | TPM_UNDEFINED, |
| 277 | TPM_UNDEFINED, |
| 278 | TPM_UNDEFINED, |
| 279 | TPM_LONG, /* 170 */ |
| 280 | TPM_UNDEFINED, |
| 281 | TPM_UNDEFINED, |
| 282 | TPM_UNDEFINED, |
| 283 | TPM_UNDEFINED, |
| 284 | TPM_UNDEFINED, /* 175 */ |
| 285 | TPM_UNDEFINED, |
| 286 | TPM_UNDEFINED, |
| 287 | TPM_UNDEFINED, |
| 288 | TPM_UNDEFINED, |
| 289 | TPM_MEDIUM, /* 180 */ |
| 290 | TPM_SHORT, |
| 291 | TPM_MEDIUM, |
| 292 | TPM_MEDIUM, |
| 293 | TPM_MEDIUM, |
| 294 | TPM_MEDIUM, /* 185 */ |
| 295 | TPM_SHORT, |
| 296 | TPM_UNDEFINED, |
| 297 | TPM_UNDEFINED, |
| 298 | TPM_UNDEFINED, |
| 299 | TPM_UNDEFINED, /* 190 */ |
| 300 | TPM_UNDEFINED, |
| 301 | TPM_UNDEFINED, |
| 302 | TPM_UNDEFINED, |
| 303 | TPM_UNDEFINED, |
| 304 | TPM_UNDEFINED, /* 195 */ |
| 305 | TPM_UNDEFINED, |
| 306 | TPM_UNDEFINED, |
| 307 | TPM_UNDEFINED, |
| 308 | TPM_UNDEFINED, |
| 309 | TPM_SHORT, /* 200 */ |
| 310 | TPM_UNDEFINED, |
| 311 | TPM_UNDEFINED, |
| 312 | TPM_UNDEFINED, |
| 313 | TPM_SHORT, |
| 314 | TPM_SHORT, /* 205 */ |
| 315 | TPM_SHORT, |
| 316 | TPM_SHORT, |
| 317 | TPM_SHORT, |
| 318 | TPM_SHORT, |
| 319 | TPM_MEDIUM, /* 210 */ |
| 320 | TPM_UNDEFINED, |
| 321 | TPM_MEDIUM, |
| 322 | TPM_MEDIUM, |
| 323 | TPM_MEDIUM, |
| 324 | TPM_UNDEFINED, /* 215 */ |
| 325 | TPM_MEDIUM, |
| 326 | TPM_UNDEFINED, |
| 327 | TPM_UNDEFINED, |
| 328 | TPM_SHORT, |
| 329 | TPM_SHORT, /* 220 */ |
| 330 | TPM_SHORT, |
| 331 | TPM_SHORT, |
| 332 | TPM_SHORT, |
| 333 | TPM_SHORT, |
| 334 | TPM_UNDEFINED, /* 225 */ |
| 335 | TPM_UNDEFINED, |
| 336 | TPM_UNDEFINED, |
| 337 | TPM_UNDEFINED, |
| 338 | TPM_UNDEFINED, |
| 339 | TPM_SHORT, /* 230 */ |
| 340 | TPM_LONG, |
| 341 | TPM_MEDIUM, |
| 342 | TPM_UNDEFINED, |
| 343 | TPM_UNDEFINED, |
| 344 | TPM_UNDEFINED, /* 235 */ |
| 345 | TPM_UNDEFINED, |
| 346 | TPM_UNDEFINED, |
| 347 | TPM_UNDEFINED, |
| 348 | TPM_UNDEFINED, |
| 349 | TPM_SHORT, /* 240 */ |
| 350 | TPM_UNDEFINED, |
| 351 | TPM_MEDIUM, |
| 352 | }; |
| 353 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 354 | /* Returns max number of milliseconds to wait */ |
| 355 | static unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, |
| 356 | u32 ordinal) |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 357 | { |
| 358 | int duration_idx = TPM_UNDEFINED; |
| 359 | int duration = 0; |
| 360 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 361 | if (ordinal < TPM_MAX_ORDINAL) { |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 362 | duration_idx = tpm_ordinal_duration[ordinal]; |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 363 | } else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) < |
| 364 | TPM_MAX_PROTECTED_ORDINAL) { |
| 365 | duration_idx = tpm_protected_ordinal_duration[ |
| 366 | ordinal & TPM_PROTECTED_ORDINAL_MASK]; |
| 367 | } |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 368 | |
| 369 | if (duration_idx != TPM_UNDEFINED) |
| 370 | duration = chip->vendor.duration[duration_idx]; |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 371 | |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 372 | if (duration <= 0) |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 373 | return 2 * 60 * HZ; /* Two minutes timeout */ |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 374 | else |
| 375 | return duration; |
| 376 | } |
| 377 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 378 | static ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz) |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 379 | { |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 380 | int rc; |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 381 | u32 count, ordinal; |
| 382 | unsigned long start, stop; |
| 383 | |
| 384 | struct tpm_chip *chip = &g_chip; |
| 385 | |
| 386 | /* switch endianess: big->little */ |
| 387 | count = get_unaligned_be32(buf + TPM_CMD_COUNT_BYTE); |
| 388 | ordinal = get_unaligned_be32(buf + TPM_CMD_ORDINAL_BYTE); |
| 389 | |
| 390 | if (count == 0) { |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 391 | error("no data\n"); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 392 | return -ENODATA; |
| 393 | } |
| 394 | if (count > bufsiz) { |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 395 | error("invalid count value %x %zx\n", count, bufsiz); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 396 | return -E2BIG; |
| 397 | } |
| 398 | |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 399 | debug("Calling send\n"); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 400 | rc = chip->vendor.send(chip, (u8 *)buf, count); |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 401 | debug(" ... done calling send\n"); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 402 | if (rc < 0) { |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 403 | error("tpm_transmit: tpm_send: error %d\n", rc); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 404 | goto out; |
| 405 | } |
| 406 | |
| 407 | if (chip->vendor.irq) |
| 408 | goto out_recv; |
| 409 | |
| 410 | start = get_timer(0); |
| 411 | stop = tpm_calc_ordinal_duration(chip, ordinal); |
| 412 | do { |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 413 | debug("waiting for status... %ld %ld\n", start, stop); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 414 | u8 status = chip->vendor.status(chip); |
| 415 | if ((status & chip->vendor.req_complete_mask) == |
| 416 | chip->vendor.req_complete_val) { |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 417 | debug("...got it;\n"); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 418 | goto out_recv; |
| 419 | } |
| 420 | |
Jeroen Hofstee | a9b6ef1 | 2014-06-18 22:59:48 +0200 | [diff] [blame] | 421 | if (status == chip->vendor.req_canceled) { |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 422 | error("Operation Canceled\n"); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 423 | rc = -ECANCELED; |
| 424 | goto out; |
| 425 | } |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 426 | udelay(TPM_TIMEOUT * 1000); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 427 | } while (get_timer(start) < stop); |
| 428 | |
| 429 | chip->vendor.cancel(chip); |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 430 | error("Operation Timed out\n"); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 431 | rc = -ETIME; |
| 432 | goto out; |
| 433 | |
| 434 | out_recv: |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 435 | debug("out_recv: reading response...\n"); |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 436 | rc = chip->vendor.recv(chip, (u8 *)buf, TPM_BUFSIZE); |
| 437 | if (rc < 0) |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 438 | error("tpm_transmit: tpm_recv: error %d\n", rc); |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 439 | |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 440 | out: |
| 441 | return rc; |
| 442 | } |
| 443 | |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 444 | #ifdef CONFIG_DM_I2C |
| 445 | static int tpm_open_dev(struct udevice *dev) |
| 446 | { |
| 447 | int rc; |
| 448 | |
| 449 | debug("%s: start\n", __func__); |
| 450 | if (g_chip.is_open) |
| 451 | return -EBUSY; |
| 452 | rc = tpm_vendor_init_dev(dev); |
| 453 | if (rc < 0) |
| 454 | g_chip.is_open = 0; |
| 455 | return rc; |
| 456 | } |
| 457 | #else |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 458 | static int tpm_open(uint32_t dev_addr) |
| 459 | { |
| 460 | int rc; |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 461 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 462 | if (g_chip.is_open) |
| 463 | return -EBUSY; |
| 464 | rc = tpm_vendor_init(dev_addr); |
| 465 | if (rc < 0) |
| 466 | g_chip.is_open = 0; |
| 467 | return rc; |
| 468 | } |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 469 | #endif |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 470 | static void tpm_close(void) |
| 471 | { |
| 472 | if (g_chip.is_open) { |
| 473 | tpm_vendor_cleanup(&g_chip); |
| 474 | g_chip.is_open = 0; |
| 475 | } |
| 476 | } |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 477 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 478 | static int tpm_select(void) |
| 479 | { |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 480 | #ifndef CONFIG_DM_I2C |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 481 | int ret; |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 482 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 483 | tpm.old_bus = i2c_get_bus_num(); |
| 484 | if (tpm.old_bus != tpm.i2c_bus) { |
| 485 | ret = i2c_set_bus_num(tpm.i2c_bus); |
| 486 | if (ret) { |
| 487 | debug("%s: Fail to set i2c bus %d\n", __func__, |
| 488 | tpm.i2c_bus); |
| 489 | return -1; |
| 490 | } |
| 491 | } |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 492 | #endif |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 493 | return 0; |
| 494 | } |
| 495 | |
| 496 | static int tpm_deselect(void) |
| 497 | { |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 498 | #ifndef CONFIG_DM_I2C |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 499 | int ret; |
| 500 | |
| 501 | if (tpm.old_bus != i2c_get_bus_num()) { |
| 502 | ret = i2c_set_bus_num(tpm.old_bus); |
| 503 | if (ret) { |
| 504 | debug("%s: Fail to restore i2c bus %d\n", |
| 505 | __func__, tpm.old_bus); |
| 506 | return -1; |
| 507 | } |
| 508 | } |
| 509 | tpm.old_bus = -1; |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 510 | #endif |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 511 | return 0; |
| 512 | } |
| 513 | |
| 514 | /** |
| 515 | * Decode TPM configuration. |
| 516 | * |
| 517 | * @param dev Returns a configuration of TPM device |
| 518 | * @return 0 if ok, -1 on error |
| 519 | */ |
| 520 | static int tpm_decode_config(struct tpm *dev) |
| 521 | { |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 522 | const void *blob = gd->fdt_blob; |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 523 | int parent; |
| 524 | int node; |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 525 | |
| 526 | node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM); |
| 527 | if (node < 0) { |
| 528 | node = fdtdec_next_compatible(blob, 0, |
| 529 | COMPAT_INFINEON_SLB9645_TPM); |
| 530 | } |
| 531 | if (node < 0) { |
| 532 | debug("%s: Node not found\n", __func__); |
| 533 | return -1; |
| 534 | } |
| 535 | parent = fdt_parent_offset(blob, node); |
| 536 | if (parent < 0) { |
| 537 | debug("%s: Cannot find node parent\n", __func__); |
| 538 | return -1; |
| 539 | } |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 540 | #ifdef CONFIG_DM_I2C |
| 541 | struct udevice *bus; |
| 542 | int chip_addr; |
| 543 | int ret; |
| 544 | |
| 545 | /* |
| 546 | * TODO(sjg@chromium.org): Remove this when driver model supports |
| 547 | * TPMs |
| 548 | */ |
| 549 | ret = uclass_get_device_by_of_offset(UCLASS_I2C, parent, &bus); |
| 550 | if (ret) { |
| 551 | debug("Cannot find bus for node '%s: ret=%d'\n", |
| 552 | fdt_get_name(blob, parent, NULL), ret); |
| 553 | return ret; |
| 554 | } |
| 555 | |
| 556 | chip_addr = fdtdec_get_int(blob, node, "reg", -1); |
| 557 | if (chip_addr == -1) { |
| 558 | debug("Cannot find reg property for node '%s: ret=%d'\n", |
| 559 | fdt_get_name(blob, node, NULL), ret); |
| 560 | return ret; |
| 561 | } |
| 562 | /* |
| 563 | * TODO(sjg@chromium.org): Older TPMs will need to use the older method |
| 564 | * in iic_tpm_read() so the offset length needs to be 0 here. |
| 565 | */ |
| 566 | ret = i2c_get_chip(bus, chip_addr, 1, &dev->dev); |
| 567 | if (ret) { |
| 568 | debug("Cannot find device for node '%s: ret=%d'\n", |
| 569 | fdt_get_name(blob, node, NULL), ret); |
| 570 | return ret; |
| 571 | } |
| 572 | #else |
| 573 | int i2c_bus; |
| 574 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 575 | i2c_bus = i2c_get_bus_num_fdt(parent); |
| 576 | if (i2c_bus < 0) |
| 577 | return -1; |
| 578 | dev->i2c_bus = i2c_bus; |
| 579 | dev->slave_addr = fdtdec_get_addr(blob, node, "reg"); |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 580 | #endif |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 581 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 582 | return 0; |
| 583 | } |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 584 | |
| 585 | struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *entry) |
| 586 | { |
| 587 | struct tpm_chip *chip; |
| 588 | |
| 589 | /* Driver specific per-device data */ |
| 590 | chip = &g_chip; |
| 591 | memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific)); |
| 592 | chip->is_open = 1; |
| 593 | |
| 594 | return chip; |
| 595 | } |
| 596 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 597 | int tis_init(void) |
| 598 | { |
| 599 | if (tpm.inited) |
| 600 | return 0; |
| 601 | |
| 602 | if (tpm_decode_config(&tpm)) |
| 603 | return -1; |
| 604 | |
| 605 | if (tpm_select()) |
| 606 | return -1; |
| 607 | |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 608 | #ifndef CONFIG_DM_I2C |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 609 | /* |
| 610 | * Probe TPM twice; the first probing might fail because TPM is asleep, |
| 611 | * and the probing can wake up TPM. |
| 612 | */ |
| 613 | if (i2c_probe(tpm.slave_addr) && i2c_probe(tpm.slave_addr)) { |
| 614 | debug("%s: fail to probe i2c addr 0x%x\n", __func__, |
| 615 | tpm.slave_addr); |
| 616 | return -1; |
| 617 | } |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 618 | #endif |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 619 | |
| 620 | tpm_deselect(); |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 621 | debug("%s: done\n", __func__); |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 622 | |
| 623 | tpm.inited = 1; |
| 624 | |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | int tis_open(void) |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 629 | { |
| 630 | int rc; |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 631 | |
| 632 | if (!tpm.inited) |
| 633 | return -1; |
| 634 | |
| 635 | if (tpm_select()) |
| 636 | return -1; |
| 637 | |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 638 | #ifdef CONFIG_DM_I2C |
| 639 | rc = tpm_open_dev(tpm.dev); |
| 640 | #else |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 641 | rc = tpm_open(tpm.slave_addr); |
Simon Glass | c9a3e84 | 2015-05-04 11:30:59 -0600 | [diff] [blame] | 642 | #endif |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 643 | |
| 644 | tpm_deselect(); |
| 645 | |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 646 | return rc; |
| 647 | } |
| 648 | |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 649 | int tis_close(void) |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 650 | { |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 651 | if (!tpm.inited) |
| 652 | return -1; |
| 653 | |
| 654 | if (tpm_select()) |
| 655 | return -1; |
| 656 | |
| 657 | tpm_close(); |
| 658 | |
| 659 | tpm_deselect(); |
| 660 | |
| 661 | return 0; |
| 662 | } |
| 663 | |
| 664 | int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size, |
| 665 | uint8_t *recvbuf, size_t *rbuf_len) |
| 666 | { |
| 667 | int len; |
| 668 | uint8_t buf[4096]; |
| 669 | |
| 670 | if (!tpm.inited) |
| 671 | return -1; |
| 672 | |
| 673 | if (sizeof(buf) < sbuf_size) |
| 674 | return -1; |
| 675 | |
| 676 | memcpy(buf, sendbuf, sbuf_size); |
| 677 | |
| 678 | if (tpm_select()) |
| 679 | return -1; |
| 680 | |
| 681 | len = tpm_transmit(buf, sbuf_size); |
| 682 | |
| 683 | tpm_deselect(); |
| 684 | |
| 685 | if (len < 10) { |
| 686 | *rbuf_len = 0; |
| 687 | return -1; |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 688 | } |
Tom Wai-Hong Tam | e49fed5 | 2013-04-12 11:04:37 +0000 | [diff] [blame] | 689 | |
| 690 | memcpy(recvbuf, buf, len); |
| 691 | *rbuf_len = len; |
| 692 | |
| 693 | return 0; |
Rong Chang | 8faa945 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 694 | } |