1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2014 Intel Corporation 4 * 5 * Authors: 6 * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> 7 * 8 * Maintained by: <tpmdd-devel@lists.sourceforge.net> 9 * 10 * This device driver implements the TPM interface as defined in 11 * the TCG CRB 2.0 TPM specification. 12 */ 13 14 #include <linux/acpi.h> 15 #include <linux/highmem.h> 16 #include <linux/rculist.h> 17 #include <linux/module.h> 18 #include <linux/pm_runtime.h> 19 #ifdef CONFIG_ARM64 20 #include <linux/arm-smccc.h> 21 #endif 22 #include "tpm.h" 23 24 #define ACPI_SIG_TPM2 "TPM2" 25 26 static const guid_t crb_acpi_start_guid = 27 GUID_INIT(0x6BBF6CAB, 0x5463, 0x4714, 28 0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4); 29 30 enum crb_defaults { 31 CRB_ACPI_START_REVISION_ID = 1, 32 CRB_ACPI_START_INDEX = 1, 33 }; 34 35 enum crb_loc_ctrl { 36 CRB_LOC_CTRL_REQUEST_ACCESS = BIT(0), 37 CRB_LOC_CTRL_RELINQUISH = BIT(1), 38 }; 39 40 enum crb_loc_state { 41 CRB_LOC_STATE_LOC_ASSIGNED = BIT(1), 42 CRB_LOC_STATE_TPM_REG_VALID_STS = BIT(7), 43 }; 44 45 enum crb_ctrl_req { 46 CRB_CTRL_REQ_CMD_READY = BIT(0), 47 CRB_CTRL_REQ_GO_IDLE = BIT(1), 48 }; 49 50 enum crb_ctrl_sts { 51 CRB_CTRL_STS_ERROR = BIT(0), 52 CRB_CTRL_STS_TPM_IDLE = BIT(1), 53 }; 54 55 enum crb_start { 56 CRB_START_INVOKE = BIT(0), 57 }; 58 59 enum crb_cancel { 60 CRB_CANCEL_INVOKE = BIT(0), 61 }; 62 63 struct crb_regs_head { 64 u32 loc_state; 65 u32 reserved1; 66 u32 loc_ctrl; 67 u32 loc_sts; 68 u8 reserved2[32]; 69 u64 intf_id; 70 u64 ctrl_ext; 71 } __packed; 72 73 struct crb_regs_tail { 74 u32 ctrl_req; 75 u32 ctrl_sts; 76 u32 ctrl_cancel; 77 u32 ctrl_start; 78 u32 ctrl_int_enable; 79 u32 ctrl_int_sts; 80 u32 ctrl_cmd_size; 81 u32 ctrl_cmd_pa_low; 82 u32 ctrl_cmd_pa_high; 83 u32 ctrl_rsp_size; 84 u64 ctrl_rsp_pa; 85 } __packed; 86 87 enum crb_status { 88 CRB_DRV_STS_COMPLETE = BIT(0), 89 }; 90 91 struct crb_priv { 92 u32 sm; 93 const char *hid; 94 void __iomem *iobase; 95 struct crb_regs_head __iomem *regs_h; 96 struct crb_regs_tail __iomem *regs_t; 97 u8 __iomem *cmd; 98 u8 __iomem *rsp; 99 u32 cmd_size; 100 u32 smc_func_id; 101 }; 102 103 struct tpm2_crb_smc { 104 u32 interrupt; 105 u8 interrupt_flags; 106 u8 op_flags; 107 u16 reserved2; 108 u32 smc_func_id; 109 }; 110 111 static bool crb_wait_for_reg_32(u32 __iomem *reg, u32 mask, u32 value, 112 unsigned long timeout) 113 { 114 ktime_t start; 115 ktime_t stop; 116 117 start = ktime_get(); 118 stop = ktime_add(start, ms_to_ktime(timeout)); 119 120 do { 121 if ((ioread32(reg) & mask) == value) 122 return true; 123 124 usleep_range(50, 100); 125 } while (ktime_before(ktime_get(), stop)); 126 127 return ((ioread32(reg) & mask) == value); 128 } 129 130 /** 131 * __crb_go_idle - request tpm crb device to go the idle state 132 * 133 * @dev: crb device 134 * @priv: crb private data 135 * 136 * Write CRB_CTRL_REQ_GO_IDLE to TPM_CRB_CTRL_REQ 137 * The device should respond within TIMEOUT_C by clearing the bit. 138 * Anyhow, we do not wait here as a consequent CMD_READY request 139 * will be handled correctly even if idle was not completed. 140 * 141 * The function does nothing for devices with ACPI-start method 142 * or SMC-start method. 143 * 144 * Return: 0 always 145 */ 146 static int __crb_go_idle(struct device *dev, struct crb_priv *priv) 147 { 148 if ((priv->sm == ACPI_TPM2_START_METHOD) || 149 (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || 150 (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) 151 return 0; 152 153 iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->regs_t->ctrl_req); 154 155 if (!crb_wait_for_reg_32(&priv->regs_t->ctrl_req, 156 CRB_CTRL_REQ_GO_IDLE/* mask */, 157 0, /* value */ 158 TPM2_TIMEOUT_C)) { 159 dev_warn(dev, "goIdle timed out\n"); 160 return -ETIME; 161 } 162 163 return 0; 164 } 165 166 static int crb_go_idle(struct tpm_chip *chip) 167 { 168 struct device *dev = &chip->dev; 169 struct crb_priv *priv = dev_get_drvdata(dev); 170 171 return __crb_go_idle(dev, priv); 172 } 173 174 /** 175 * __crb_cmd_ready - request tpm crb device to enter ready state 176 * 177 * @dev: crb device 178 * @priv: crb private data 179 * 180 * Write CRB_CTRL_REQ_CMD_READY to TPM_CRB_CTRL_REQ 181 * and poll till the device acknowledge it by clearing the bit. 182 * The device should respond within TIMEOUT_C. 183 * 184 * The function does nothing for devices with ACPI-start method 185 * or SMC-start method. 186 * 187 * Return: 0 on success -ETIME on timeout; 188 */ 189 static int __crb_cmd_ready(struct device *dev, struct crb_priv *priv) 190 { 191 if ((priv->sm == ACPI_TPM2_START_METHOD) || 192 (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD) || 193 (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC)) 194 return 0; 195 196 iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->regs_t->ctrl_req); 197 if (!crb_wait_for_reg_32(&priv->regs_t->ctrl_req, 198 CRB_CTRL_REQ_CMD_READY /* mask */, 199 0, /* value */ 200 TPM2_TIMEOUT_C)) { 201 dev_warn(dev, "cmdReady timed out\n"); 202 return -ETIME; 203 } 204 205 return 0; 206 } 207 208 static int crb_cmd_ready(struct tpm_chip *chip) 209 { 210 struct device *dev = &chip->dev; 211 struct crb_priv *priv = dev_get_drvdata(dev); 212 213 return __crb_cmd_ready(dev, priv); 214 } 215 216 static int __crb_request_locality(struct device *dev, 217 struct crb_priv *priv, int loc) 218 { 219 u32 value = CRB_LOC_STATE_LOC_ASSIGNED | 220 CRB_LOC_STATE_TPM_REG_VALID_STS; 221 222 if (!priv->regs_h) 223 return 0; 224 225 iowrite32(CRB_LOC_CTRL_REQUEST_ACCESS, &priv->regs_h->loc_ctrl); 226 if (!crb_wait_for_reg_32(&priv->regs_h->loc_state, value, value, 227 TPM2_TIMEOUT_C)) { 228 dev_warn(dev, "TPM_LOC_STATE_x.requestAccess timed out\n"); 229 return -ETIME; 230 } 231 232 return 0; 233 } 234 235 static int crb_request_locality(struct tpm_chip *chip, int loc) 236 { 237 struct crb_priv *priv = dev_get_drvdata(&chip->dev); 238 239 return __crb_request_locality(&chip->dev, priv, loc); 240 } 241 242 static int __crb_relinquish_locality(struct device *dev, 243 struct crb_priv *priv, int loc) 244 { 245 u32 mask = CRB_LOC_STATE_LOC_ASSIGNED | 246 CRB_LOC_STATE_TPM_REG_VALID_STS; 247 u32 value = CRB_LOC_STATE_TPM_REG_VALID_STS; 248 249 if (!priv->regs_h) 250 return 0; 251 252 iowrite32(CRB_LOC_CTRL_RELINQUISH, &priv->regs_h->loc_ctrl); 253 if (!crb_wait_for_reg_32(&priv->regs_h->loc_state, mask, value, 254 TPM2_TIMEOUT_C)) { 255 dev_warn(dev, "TPM_LOC_STATE_x.requestAccess timed out\n"); 256 return -ETIME; 257 } 258 259 return 0; 260 } 261 262 static int crb_relinquish_locality(struct tpm_chip *chip, int loc) 263 { 264 struct crb_priv *priv = dev_get_drvdata(&chip->dev); 265 266 return __crb_relinquish_locality(&chip->dev, priv, loc); 267 } 268 269 static u8 crb_status(struct tpm_chip *chip) 270 { 271 struct crb_priv *priv = dev_get_drvdata(&chip->dev); 272 u8 sts = 0; 273 274 if ((ioread32(&priv->regs_t->ctrl_start) & CRB_START_INVOKE) != 275 CRB_START_INVOKE) 276 sts |= CRB_DRV_STS_COMPLETE; 277 278 return sts; 279 } 280 281 static int crb_recv(struct tpm_chip *chip, u8 *buf, size_t count) 282 { 283 struct crb_priv *priv = dev_get_drvdata(&chip->dev); 284 unsigned int expected; 285 286 /* A sanity check that the upper layer wants to get at least the header 287 * as that is the minimum size for any TPM response. 288 */ 289 if (count < TPM_HEADER_SIZE) 290 return -EIO; 291 292 /* If this bit is set, according to the spec, the TPM is in 293 * unrecoverable condition. 294 */ 295 if (ioread32(&priv->regs_t->ctrl_sts) & CRB_CTRL_STS_ERROR) 296 return -EIO; 297 298 /* Read the first 8 bytes in order to get the length of the response. 299 * We read exactly a quad word in order to make sure that the remaining 300 * reads will be aligned. 301 */ 302 memcpy_fromio(buf, priv->rsp, 8); 303 304 expected = be32_to_cpup((__be32 *)&buf[2]); 305 if (expected > count || expected < TPM_HEADER_SIZE) 306 return -EIO; 307 308 memcpy_fromio(&buf[8], &priv->rsp[8], expected - 8); 309 310 return expected; 311 } 312 313 static int crb_do_acpi_start(struct tpm_chip *chip) 314 { 315 union acpi_object *obj; 316 int rc; 317 318 obj = acpi_evaluate_dsm(chip->acpi_dev_handle, 319 &crb_acpi_start_guid, 320 CRB_ACPI_START_REVISION_ID, 321 CRB_ACPI_START_INDEX, 322 NULL); 323 if (!obj) 324 return -ENXIO; 325 rc = obj->integer.value == 0 ? 0 : -ENXIO; 326 ACPI_FREE(obj); 327 return rc; 328 } 329 330 #ifdef CONFIG_ARM64 331 /* 332 * This is a TPM Command Response Buffer start method that invokes a 333 * Secure Monitor Call to requrest the firmware to execute or cancel 334 * a TPM 2.0 command. 335 */ 336 static int tpm_crb_smc_start(struct device *dev, unsigned long func_id) 337 { 338 struct arm_smccc_res res; 339 340 arm_smccc_smc(func_id, 0, 0, 0, 0, 0, 0, 0, &res); 341 if (res.a0 != 0) { 342 dev_err(dev, 343 FW_BUG "tpm_crb_smc_start() returns res.a0 = 0x%lx\n", 344 res.a0); 345 return -EIO; 346 } 347 348 return 0; 349 } 350 #else 351 static int tpm_crb_smc_start(struct device *dev, unsigned long func_id) 352 { 353 dev_err(dev, FW_BUG "tpm_crb: incorrect start method\n"); 354 return -EINVAL; 355 } 356 #endif 357 358 static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len) 359 { 360 struct crb_priv *priv = dev_get_drvdata(&chip->dev); 361 int rc = 0; 362 363 /* Zero the cancel register so that the next command will not get 364 * canceled. 365 */ 366 iowrite32(0, &priv->regs_t->ctrl_cancel); 367 368 if (len > priv->cmd_size) { 369 dev_err(&chip->dev, "invalid command count value %zd %d\n", 370 len, priv->cmd_size); 371 return -E2BIG; 372 } 373 374 memcpy_toio(priv->cmd, buf, len); 375 376 /* Make sure that cmd is populated before issuing start. */ 377 wmb(); 378 379 /* The reason for the extra quirk is that the PTT in 4th Gen Core CPUs 380 * report only ACPI start but in practice seems to require both 381 * CRB start, hence invoking CRB start method if hid == MSFT0101. 382 */ 383 if ((priv->sm == ACPI_TPM2_COMMAND_BUFFER) || 384 (priv->sm == ACPI_TPM2_MEMORY_MAPPED) || 385 (!strcmp(priv->hid, "MSFT0101"))) 386 iowrite32(CRB_START_INVOKE, &priv->regs_t->ctrl_start); 387 388 if ((priv->sm == ACPI_TPM2_START_METHOD) || 389 (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD)) 390 rc = crb_do_acpi_start(chip); 391 392 if (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC) { 393 iowrite32(CRB_START_INVOKE, &priv->regs_t->ctrl_start); 394 rc = tpm_crb_smc_start(&chip->dev, priv->smc_func_id); 395 } 396 397 return rc; 398 } 399 400 static void crb_cancel(struct tpm_chip *chip) 401 { 402 struct crb_priv *priv = dev_get_drvdata(&chip->dev); 403 404 iowrite32(CRB_CANCEL_INVOKE, &priv->regs_t->ctrl_cancel); 405 406 if (((priv->sm == ACPI_TPM2_START_METHOD) || 407 (priv->sm == ACPI_TPM2_COMMAND_BUFFER_WITH_START_METHOD)) && 408 crb_do_acpi_start(chip)) 409 dev_err(&chip->dev, "ACPI Start failed\n"); 410 } 411 412 static bool crb_req_canceled(struct tpm_chip *chip, u8 status) 413 { 414 struct crb_priv *priv = dev_get_drvdata(&chip->dev); 415 u32 cancel = ioread32(&priv->regs_t->ctrl_cancel); 416 417 return (cancel & CRB_CANCEL_INVOKE) == CRB_CANCEL_INVOKE; 418 } 419 420 static const struct tpm_class_ops tpm_crb = { 421 .flags = TPM_OPS_AUTO_STARTUP, 422 .status = crb_status, 423 .recv = crb_recv, 424 .send = crb_send, 425 .cancel = crb_cancel, 426 .req_canceled = crb_req_canceled, 427 .go_idle = crb_go_idle, 428 .cmd_ready = crb_cmd_ready, 429 .request_locality = crb_request_locality, 430 .relinquish_locality = crb_relinquish_locality, 431 .req_complete_mask = CRB_DRV_STS_COMPLETE, 432 .req_complete_val = CRB_DRV_STS_COMPLETE, 433 }; 434 435 static int crb_check_resource(struct acpi_resource *ares, void *data) 436 { 437 struct resource *io_res = data; 438 struct resource_win win; 439 struct resource *res = &(win.res); 440 441 if (acpi_dev_resource_memory(ares, res) || 442 acpi_dev_resource_address_space(ares, &win)) { 443 *io_res = *res; 444 io_res->name = NULL; 445 } 446 447 return 1; 448 } 449 450 static void __iomem *crb_map_res(struct device *dev, struct crb_priv *priv, 451 struct resource *io_res, u64 start, u32 size) 452 { 453 struct resource new_res = { 454 .start = start, 455 .end = start + size - 1, 456 .flags = IORESOURCE_MEM, 457 }; 458 459 /* Detect a 64 bit address on a 32 bit system */ 460 if (start != new_res.start) 461 return (void __iomem *) ERR_PTR(-EINVAL); 462 463 if (!resource_contains(io_res, &new_res)) 464 return devm_ioremap_resource(dev, &new_res); 465 466 return priv->iobase + (new_res.start - io_res->start); 467 } 468 469 /* 470 * Work around broken BIOSs that return inconsistent values from the ACPI 471 * region vs the registers. Trust the ACPI region. Such broken systems 472 * probably cannot send large TPM commands since the buffer will be truncated. 473 */ 474 static u64 crb_fixup_cmd_size(struct device *dev, struct resource *io_res, 475 u64 start, u64 size) 476 { 477 if (io_res->start > start || io_res->end < start) 478 return size; 479 480 if (start + size - 1 <= io_res->end) 481 return size; 482 483 dev_err(dev, 484 FW_BUG "ACPI region does not cover the entire command/response buffer. %pr vs %llx %llx\n", 485 io_res, start, size); 486 487 return io_res->end - start + 1; 488 } 489 490 static int crb_map_io(struct acpi_device *device, struct crb_priv *priv, 491 struct acpi_table_tpm2 *buf) 492 { 493 struct list_head resources; 494 struct resource io_res; 495 struct device *dev = &device->dev; 496 u32 pa_high, pa_low; 497 u64 cmd_pa; 498 u32 cmd_size; 499 __le64 __rsp_pa; 500 u64 rsp_pa; 501 u32 rsp_size; 502 int ret; 503 504 INIT_LIST_HEAD(&resources); 505 ret = acpi_dev_get_resources(device, &resources, crb_check_resource, 506 &io_res); 507 if (ret < 0) 508 return ret; 509 acpi_dev_free_resource_list(&resources); 510 511 if (resource_type(&io_res) != IORESOURCE_MEM) { 512 dev_err(dev, FW_BUG "TPM2 ACPI table does not define a memory resource\n"); 513 return -EINVAL; 514 } 515 516 priv->iobase = devm_ioremap_resource(dev, &io_res); 517 if (IS_ERR(priv->iobase)) 518 return PTR_ERR(priv->iobase); 519 520 /* The ACPI IO region starts at the head area and continues to include 521 * the control area, as one nice sane region except for some older 522 * stuff that puts the control area outside the ACPI IO region. 523 */ 524 if ((priv->sm == ACPI_TPM2_COMMAND_BUFFER) || 525 (priv->sm == ACPI_TPM2_MEMORY_MAPPED)) { 526 if (buf->control_address == io_res.start + 527 sizeof(*priv->regs_h)) 528 priv->regs_h = priv->iobase; 529 else 530 dev_warn(dev, FW_BUG "Bad ACPI memory layout"); 531 } 532 533 ret = __crb_request_locality(dev, priv, 0); 534 if (ret) 535 return ret; 536 537 priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address, 538 sizeof(struct crb_regs_tail)); 539 if (IS_ERR(priv->regs_t)) { 540 ret = PTR_ERR(priv->regs_t); 541 goto out_relinquish_locality; 542 } 543 544 /* 545 * PTT HW bug w/a: wake up the device to access 546 * possibly not retained registers. 547 */ 548 ret = __crb_cmd_ready(dev, priv); 549 if (ret) 550 goto out_relinquish_locality; 551 552 pa_high = ioread32(&priv->regs_t->ctrl_cmd_pa_high); 553 pa_low = ioread32(&priv->regs_t->ctrl_cmd_pa_low); 554 cmd_pa = ((u64)pa_high << 32) | pa_low; 555 cmd_size = crb_fixup_cmd_size(dev, &io_res, cmd_pa, 556 ioread32(&priv->regs_t->ctrl_cmd_size)); 557 558 dev_dbg(dev, "cmd_hi = %X cmd_low = %X cmd_size %X\n", 559 pa_high, pa_low, cmd_size); 560 561 priv->cmd = crb_map_res(dev, priv, &io_res, cmd_pa, cmd_size); 562 if (IS_ERR(priv->cmd)) { 563 ret = PTR_ERR(priv->cmd); 564 goto out; 565 } 566 567 memcpy_fromio(&__rsp_pa, &priv->regs_t->ctrl_rsp_pa, 8); 568 rsp_pa = le64_to_cpu(__rsp_pa); 569 rsp_size = crb_fixup_cmd_size(dev, &io_res, rsp_pa, 570 ioread32(&priv->regs_t->ctrl_rsp_size)); 571 572 if (cmd_pa != rsp_pa) { 573 priv->rsp = crb_map_res(dev, priv, &io_res, rsp_pa, rsp_size); 574 ret = PTR_ERR_OR_ZERO(priv->rsp); 575 goto out; 576 } 577 578 /* According to the PTP specification, overlapping command and response 579 * buffer sizes must be identical. 580 */ 581 if (cmd_size != rsp_size) { 582 dev_err(dev, FW_BUG "overlapping command and response buffer sizes are not identical"); 583 ret = -EINVAL; 584 goto out; 585 } 586 587 priv->rsp = priv->cmd; 588 589 out: 590 if (!ret) 591 priv->cmd_size = cmd_size; 592 593 __crb_go_idle(dev, priv); 594 595 out_relinquish_locality: 596 597 __crb_relinquish_locality(dev, priv, 0); 598 599 return ret; 600 } 601 602 static int crb_acpi_add(struct acpi_device *device) 603 { 604 struct acpi_table_tpm2 *buf; 605 struct crb_priv *priv; 606 struct tpm_chip *chip; 607 struct device *dev = &device->dev; 608 struct tpm2_crb_smc *crb_smc; 609 acpi_status status; 610 u32 sm; 611 int rc; 612 613 status = acpi_get_table(ACPI_SIG_TPM2, 1, 614 (struct acpi_table_header **) &buf); 615 if (ACPI_FAILURE(status) || buf->header.length < sizeof(*buf)) { 616 dev_err(dev, FW_BUG "failed to get TPM2 ACPI table\n"); 617 return -EINVAL; 618 } 619 620 /* Should the FIFO driver handle this? */ 621 sm = buf->start_method; 622 if (sm == ACPI_TPM2_MEMORY_MAPPED) 623 return -ENODEV; 624 625 priv = devm_kzalloc(dev, sizeof(struct crb_priv), GFP_KERNEL); 626 if (!priv) 627 return -ENOMEM; 628 629 if (sm == ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC) { 630 if (buf->header.length < (sizeof(*buf) + sizeof(*crb_smc))) { 631 dev_err(dev, 632 FW_BUG "TPM2 ACPI table has wrong size %u for start method type %d\n", 633 buf->header.length, 634 ACPI_TPM2_COMMAND_BUFFER_WITH_ARM_SMC); 635 return -EINVAL; 636 } 637 crb_smc = ACPI_ADD_PTR(struct tpm2_crb_smc, buf, sizeof(*buf)); 638 priv->smc_func_id = crb_smc->smc_func_id; 639 } 640 641 priv->sm = sm; 642 priv->hid = acpi_device_hid(device); 643 644 rc = crb_map_io(device, priv, buf); 645 if (rc) 646 return rc; 647 648 chip = tpmm_chip_alloc(dev, &tpm_crb); 649 if (IS_ERR(chip)) 650 return PTR_ERR(chip); 651 652 dev_set_drvdata(&chip->dev, priv); 653 chip->acpi_dev_handle = device->handle; 654 chip->flags = TPM_CHIP_FLAG_TPM2; 655 656 return tpm_chip_register(chip); 657 } 658 659 static int crb_acpi_remove(struct acpi_device *device) 660 { 661 struct device *dev = &device->dev; 662 struct tpm_chip *chip = dev_get_drvdata(dev); 663 664 tpm_chip_unregister(chip); 665 666 return 0; 667 } 668 669 static const struct dev_pm_ops crb_pm = { 670 SET_SYSTEM_SLEEP_PM_OPS(tpm_pm_suspend, tpm_pm_resume) 671 }; 672 673 static const struct acpi_device_id crb_device_ids[] = { 674 {"MSFT0101", 0}, 675 {"", 0}, 676 }; 677 MODULE_DEVICE_TABLE(acpi, crb_device_ids); 678 679 static struct acpi_driver crb_acpi_driver = { 680 .name = "tpm_crb", 681 .ids = crb_device_ids, 682 .ops = { 683 .add = crb_acpi_add, 684 .remove = crb_acpi_remove, 685 }, 686 .drv = { 687 .pm = &crb_pm, 688 }, 689 }; 690 691 module_acpi_driver(crb_acpi_driver); 692 MODULE_AUTHOR("Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>"); 693 MODULE_DESCRIPTION("TPM2 Driver"); 694 MODULE_VERSION("0.1"); 695 MODULE_LICENSE("GPL"); 696