1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (C) 2012-2019 ARM Limited or its affiliates. */ 3 4 #include <linux/kernel.h> 5 #include <linux/module.h> 6 7 #include <linux/crypto.h> 8 #include <linux/moduleparam.h> 9 #include <linux/types.h> 10 #include <linux/interrupt.h> 11 #include <linux/platform_device.h> 12 #include <linux/slab.h> 13 #include <linux/spinlock.h> 14 #include <linux/of.h> 15 #include <linux/clk.h> 16 #include <linux/of_address.h> 17 #include <linux/pm_runtime.h> 18 19 #include "cc_driver.h" 20 #include "cc_request_mgr.h" 21 #include "cc_buffer_mgr.h" 22 #include "cc_debugfs.h" 23 #include "cc_cipher.h" 24 #include "cc_aead.h" 25 #include "cc_hash.h" 26 #include "cc_sram_mgr.h" 27 #include "cc_pm.h" 28 #include "cc_fips.h" 29 30 bool cc_dump_desc; 31 module_param_named(dump_desc, cc_dump_desc, bool, 0600); 32 MODULE_PARM_DESC(cc_dump_desc, "Dump descriptors to kernel log as debugging aid"); 33 bool cc_dump_bytes; 34 module_param_named(dump_bytes, cc_dump_bytes, bool, 0600); 35 MODULE_PARM_DESC(cc_dump_bytes, "Dump buffers to kernel log as debugging aid"); 36 37 static bool cc_sec_disable; 38 module_param_named(sec_disable, cc_sec_disable, bool, 0600); 39 MODULE_PARM_DESC(cc_sec_disable, "Disable security functions"); 40 41 struct cc_hw_data { 42 char *name; 43 enum cc_hw_rev rev; 44 u32 sig; 45 u32 cidr_0123; 46 u32 pidr_0124; 47 int std_bodies; 48 }; 49 50 #define CC_NUM_IDRS 4 51 #define CC_HW_RESET_LOOP_COUNT 10 52 53 /* Note: PIDR3 holds CMOD/Rev so ignored for HW identification purposes */ 54 static const u32 pidr_0124_offsets[CC_NUM_IDRS] = { 55 CC_REG(PERIPHERAL_ID_0), CC_REG(PERIPHERAL_ID_1), 56 CC_REG(PERIPHERAL_ID_2), CC_REG(PERIPHERAL_ID_4) 57 }; 58 59 static const u32 cidr_0123_offsets[CC_NUM_IDRS] = { 60 CC_REG(COMPONENT_ID_0), CC_REG(COMPONENT_ID_1), 61 CC_REG(COMPONENT_ID_2), CC_REG(COMPONENT_ID_3) 62 }; 63 64 /* Hardware revisions defs. */ 65 66 /* The 703 is a OSCCA only variant of the 713 */ 67 static const struct cc_hw_data cc703_hw = { 68 .name = "703", .rev = CC_HW_REV_713, .cidr_0123 = 0xB105F00DU, 69 .pidr_0124 = 0x040BB0D0U, .std_bodies = CC_STD_OSCCA 70 }; 71 72 static const struct cc_hw_data cc713_hw = { 73 .name = "713", .rev = CC_HW_REV_713, .cidr_0123 = 0xB105F00DU, 74 .pidr_0124 = 0x040BB0D0U, .std_bodies = CC_STD_ALL 75 }; 76 77 static const struct cc_hw_data cc712_hw = { 78 .name = "712", .rev = CC_HW_REV_712, .sig = 0xDCC71200U, 79 .std_bodies = CC_STD_ALL 80 }; 81 82 static const struct cc_hw_data cc710_hw = { 83 .name = "710", .rev = CC_HW_REV_710, .sig = 0xDCC63200U, 84 .std_bodies = CC_STD_ALL 85 }; 86 87 static const struct cc_hw_data cc630p_hw = { 88 .name = "630P", .rev = CC_HW_REV_630, .sig = 0xDCC63000U, 89 .std_bodies = CC_STD_ALL 90 }; 91 92 static const struct of_device_id arm_ccree_dev_of_match[] = { 93 { .compatible = "arm,cryptocell-703-ree", .data = &cc703_hw }, 94 { .compatible = "arm,cryptocell-713-ree", .data = &cc713_hw }, 95 { .compatible = "arm,cryptocell-712-ree", .data = &cc712_hw }, 96 { .compatible = "arm,cryptocell-710-ree", .data = &cc710_hw }, 97 { .compatible = "arm,cryptocell-630p-ree", .data = &cc630p_hw }, 98 {} 99 }; 100 MODULE_DEVICE_TABLE(of, arm_ccree_dev_of_match); 101 102 static void init_cc_cache_params(struct cc_drvdata *drvdata) 103 { 104 struct device *dev = drvdata_to_dev(drvdata); 105 u32 cache_params, ace_const, val; 106 u64 mask; 107 108 /* compute CC_AXIM_CACHE_PARAMS */ 109 cache_params = cc_ioread(drvdata, CC_REG(AXIM_CACHE_PARAMS)); 110 dev_dbg(dev, "Cache params previous: 0x%08X\n", cache_params); 111 112 /* non cached or write-back, write allocate */ 113 val = drvdata->coherent ? 0xb : 0x2; 114 115 mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE); 116 cache_params &= ~mask; 117 cache_params |= FIELD_PREP(mask, val); 118 119 mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_AWCACHE_LAST); 120 cache_params &= ~mask; 121 cache_params |= FIELD_PREP(mask, val); 122 123 mask = CC_GENMASK(CC_AXIM_CACHE_PARAMS_ARCACHE); 124 cache_params &= ~mask; 125 cache_params |= FIELD_PREP(mask, val); 126 127 drvdata->cache_params = cache_params; 128 129 dev_dbg(dev, "Cache params current: 0x%08X\n", cache_params); 130 131 if (drvdata->hw_rev <= CC_HW_REV_710) 132 return; 133 134 /* compute CC_AXIM_ACE_CONST */ 135 ace_const = cc_ioread(drvdata, CC_REG(AXIM_ACE_CONST)); 136 dev_dbg(dev, "ACE-const previous: 0x%08X\n", ace_const); 137 138 /* system or outer-sharable */ 139 val = drvdata->coherent ? 0x2 : 0x3; 140 141 mask = CC_GENMASK(CC_AXIM_ACE_CONST_ARDOMAIN); 142 ace_const &= ~mask; 143 ace_const |= FIELD_PREP(mask, val); 144 145 mask = CC_GENMASK(CC_AXIM_ACE_CONST_AWDOMAIN); 146 ace_const &= ~mask; 147 ace_const |= FIELD_PREP(mask, val); 148 149 dev_dbg(dev, "ACE-const current: 0x%08X\n", ace_const); 150 151 drvdata->ace_const = ace_const; 152 } 153 154 static u32 cc_read_idr(struct cc_drvdata *drvdata, const u32 *idr_offsets) 155 { 156 int i; 157 union { 158 u8 regs[CC_NUM_IDRS]; 159 __le32 val; 160 } idr; 161 162 for (i = 0; i < CC_NUM_IDRS; ++i) 163 idr.regs[i] = cc_ioread(drvdata, idr_offsets[i]); 164 165 return le32_to_cpu(idr.val); 166 } 167 168 void __dump_byte_array(const char *name, const u8 *buf, size_t len) 169 { 170 char prefix[64]; 171 172 if (!buf) 173 return; 174 175 snprintf(prefix, sizeof(prefix), "%s[%zu]: ", name, len); 176 177 print_hex_dump(KERN_DEBUG, prefix, DUMP_PREFIX_ADDRESS, 16, 1, buf, 178 len, false); 179 } 180 181 static irqreturn_t cc_isr(int irq, void *dev_id) 182 { 183 struct cc_drvdata *drvdata = (struct cc_drvdata *)dev_id; 184 struct device *dev = drvdata_to_dev(drvdata); 185 u32 irr; 186 u32 imr; 187 188 /* STAT_OP_TYPE_GENERIC STAT_PHASE_0: Interrupt */ 189 /* if driver suspended return, probably shared interrupt */ 190 if (pm_runtime_suspended(dev)) 191 return IRQ_NONE; 192 193 /* read the interrupt status */ 194 irr = cc_ioread(drvdata, CC_REG(HOST_IRR)); 195 dev_dbg(dev, "Got IRR=0x%08X\n", irr); 196 197 if (irr == 0) /* Probably shared interrupt line */ 198 return IRQ_NONE; 199 200 imr = cc_ioread(drvdata, CC_REG(HOST_IMR)); 201 202 /* clear interrupt - must be before processing events */ 203 cc_iowrite(drvdata, CC_REG(HOST_ICR), irr); 204 205 drvdata->irq = irr; 206 /* Completion interrupt - most probable */ 207 if (irr & drvdata->comp_mask) { 208 /* Mask all completion interrupts - will be unmasked in 209 * deferred service handler 210 */ 211 cc_iowrite(drvdata, CC_REG(HOST_IMR), imr | drvdata->comp_mask); 212 irr &= ~drvdata->comp_mask; 213 complete_request(drvdata); 214 } 215 #ifdef CONFIG_CRYPTO_FIPS 216 /* TEE FIPS interrupt */ 217 if (irr & CC_GPR0_IRQ_MASK) { 218 /* Mask interrupt - will be unmasked in Deferred service 219 * handler 220 */ 221 cc_iowrite(drvdata, CC_REG(HOST_IMR), imr | CC_GPR0_IRQ_MASK); 222 irr &= ~CC_GPR0_IRQ_MASK; 223 fips_handler(drvdata); 224 } 225 #endif 226 /* AXI error interrupt */ 227 if (irr & CC_AXI_ERR_IRQ_MASK) { 228 u32 axi_err; 229 230 /* Read the AXI error ID */ 231 axi_err = cc_ioread(drvdata, CC_REG(AXIM_MON_ERR)); 232 dev_dbg(dev, "AXI completion error: axim_mon_err=0x%08X\n", 233 axi_err); 234 235 irr &= ~CC_AXI_ERR_IRQ_MASK; 236 } 237 238 if (irr) { 239 dev_dbg_ratelimited(dev, "IRR includes unknown cause bits (0x%08X)\n", 240 irr); 241 /* Just warning */ 242 } 243 244 return IRQ_HANDLED; 245 } 246 247 bool cc_wait_for_reset_completion(struct cc_drvdata *drvdata) 248 { 249 unsigned int val; 250 unsigned int i; 251 252 /* 712/710/63 has no reset completion indication, always return true */ 253 if (drvdata->hw_rev <= CC_HW_REV_712) 254 return true; 255 256 for (i = 0; i < CC_HW_RESET_LOOP_COUNT; i++) { 257 /* in cc7x3 NVM_IS_IDLE indicates that CC reset is 258 * completed and device is fully functional 259 */ 260 val = cc_ioread(drvdata, CC_REG(NVM_IS_IDLE)); 261 if (val & CC_NVM_IS_IDLE_MASK) { 262 /* hw indicate reset completed */ 263 return true; 264 } 265 /* allow scheduling other process on the processor */ 266 schedule(); 267 } 268 /* reset not completed */ 269 return false; 270 } 271 272 int init_cc_regs(struct cc_drvdata *drvdata) 273 { 274 unsigned int val; 275 struct device *dev = drvdata_to_dev(drvdata); 276 277 /* Unmask all AXI interrupt sources AXI_CFG1 register */ 278 /* AXI interrupt config are obsoleted startign at cc7x3 */ 279 if (drvdata->hw_rev <= CC_HW_REV_712) { 280 val = cc_ioread(drvdata, CC_REG(AXIM_CFG)); 281 cc_iowrite(drvdata, CC_REG(AXIM_CFG), val & ~CC_AXI_IRQ_MASK); 282 dev_dbg(dev, "AXIM_CFG=0x%08X\n", 283 cc_ioread(drvdata, CC_REG(AXIM_CFG))); 284 } 285 286 /* Clear all pending interrupts */ 287 val = cc_ioread(drvdata, CC_REG(HOST_IRR)); 288 dev_dbg(dev, "IRR=0x%08X\n", val); 289 cc_iowrite(drvdata, CC_REG(HOST_ICR), val); 290 291 /* Unmask relevant interrupt cause */ 292 val = drvdata->comp_mask | CC_AXI_ERR_IRQ_MASK; 293 294 if (drvdata->hw_rev >= CC_HW_REV_712) 295 val |= CC_GPR0_IRQ_MASK; 296 297 cc_iowrite(drvdata, CC_REG(HOST_IMR), ~val); 298 299 cc_iowrite(drvdata, CC_REG(AXIM_CACHE_PARAMS), drvdata->cache_params); 300 if (drvdata->hw_rev >= CC_HW_REV_712) 301 cc_iowrite(drvdata, CC_REG(AXIM_ACE_CONST), drvdata->ace_const); 302 303 return 0; 304 } 305 306 static int init_cc_resources(struct platform_device *plat_dev) 307 { 308 struct resource *req_mem_cc_regs = NULL; 309 struct cc_drvdata *new_drvdata; 310 struct device *dev = &plat_dev->dev; 311 struct device_node *np = dev->of_node; 312 u32 val, hw_rev_pidr, sig_cidr; 313 u64 dma_mask; 314 const struct cc_hw_data *hw_rev; 315 struct clk *clk; 316 int irq; 317 int rc = 0; 318 319 new_drvdata = devm_kzalloc(dev, sizeof(*new_drvdata), GFP_KERNEL); 320 if (!new_drvdata) 321 return -ENOMEM; 322 323 hw_rev = of_device_get_match_data(dev); 324 new_drvdata->hw_rev_name = hw_rev->name; 325 new_drvdata->hw_rev = hw_rev->rev; 326 new_drvdata->std_bodies = hw_rev->std_bodies; 327 328 if (hw_rev->rev >= CC_HW_REV_712) { 329 new_drvdata->axim_mon_offset = CC_REG(AXIM_MON_COMP); 330 new_drvdata->sig_offset = CC_REG(HOST_SIGNATURE_712); 331 new_drvdata->ver_offset = CC_REG(HOST_VERSION_712); 332 } else { 333 new_drvdata->axim_mon_offset = CC_REG(AXIM_MON_COMP8); 334 new_drvdata->sig_offset = CC_REG(HOST_SIGNATURE_630); 335 new_drvdata->ver_offset = CC_REG(HOST_VERSION_630); 336 } 337 338 new_drvdata->comp_mask = CC_COMP_IRQ_MASK; 339 340 platform_set_drvdata(plat_dev, new_drvdata); 341 new_drvdata->plat_dev = plat_dev; 342 343 clk = devm_clk_get_optional(dev, NULL); 344 if (IS_ERR(clk)) 345 return dev_err_probe(dev, PTR_ERR(clk), "Error getting clock\n"); 346 new_drvdata->clk = clk; 347 348 new_drvdata->coherent = of_dma_is_coherent(np); 349 350 /* Get device resources */ 351 /* First CC registers space */ 352 /* Map registers space */ 353 new_drvdata->cc_base = devm_platform_get_and_ioremap_resource(plat_dev, 354 0, &req_mem_cc_regs); 355 if (IS_ERR(new_drvdata->cc_base)) 356 return PTR_ERR(new_drvdata->cc_base); 357 358 dev_dbg(dev, "Got MEM resource (%s): %pR\n", req_mem_cc_regs->name, 359 req_mem_cc_regs); 360 dev_dbg(dev, "CC registers mapped from %pa to 0x%p\n", 361 &req_mem_cc_regs->start, new_drvdata->cc_base); 362 363 /* Then IRQ */ 364 irq = platform_get_irq(plat_dev, 0); 365 if (irq < 0) 366 return irq; 367 368 init_completion(&new_drvdata->hw_queue_avail); 369 370 if (!dev->dma_mask) 371 dev->dma_mask = &dev->coherent_dma_mask; 372 373 dma_mask = DMA_BIT_MASK(DMA_BIT_MASK_LEN); 374 rc = dma_set_coherent_mask(dev, dma_mask); 375 if (rc) { 376 dev_err(dev, "Failed in dma_set_coherent_mask, mask=%llx\n", 377 dma_mask); 378 return rc; 379 } 380 381 rc = clk_prepare_enable(new_drvdata->clk); 382 if (rc) { 383 dev_err(dev, "Failed to enable clock"); 384 return rc; 385 } 386 387 new_drvdata->sec_disabled = cc_sec_disable; 388 389 pm_runtime_set_autosuspend_delay(dev, CC_SUSPEND_TIMEOUT); 390 pm_runtime_use_autosuspend(dev); 391 pm_runtime_set_active(dev); 392 pm_runtime_enable(dev); 393 rc = pm_runtime_get_sync(dev); 394 if (rc < 0) { 395 dev_err(dev, "pm_runtime_get_sync() failed: %d\n", rc); 396 goto post_pm_err; 397 } 398 399 /* Wait for Cryptocell reset completion */ 400 if (!cc_wait_for_reset_completion(new_drvdata)) { 401 dev_err(dev, "Cryptocell reset not completed"); 402 } 403 404 if (hw_rev->rev <= CC_HW_REV_712) { 405 /* Verify correct mapping */ 406 val = cc_ioread(new_drvdata, new_drvdata->sig_offset); 407 if (val != hw_rev->sig) { 408 dev_err(dev, "Invalid CC signature: SIGNATURE=0x%08X != expected=0x%08X\n", 409 val, hw_rev->sig); 410 rc = -EINVAL; 411 goto post_pm_err; 412 } 413 sig_cidr = val; 414 hw_rev_pidr = cc_ioread(new_drvdata, new_drvdata->ver_offset); 415 } else { 416 /* Verify correct mapping */ 417 val = cc_read_idr(new_drvdata, pidr_0124_offsets); 418 if (val != hw_rev->pidr_0124) { 419 dev_err(dev, "Invalid CC PIDR: PIDR0124=0x%08X != expected=0x%08X\n", 420 val, hw_rev->pidr_0124); 421 rc = -EINVAL; 422 goto post_pm_err; 423 } 424 hw_rev_pidr = val; 425 426 val = cc_read_idr(new_drvdata, cidr_0123_offsets); 427 if (val != hw_rev->cidr_0123) { 428 dev_err(dev, "Invalid CC CIDR: CIDR0123=0x%08X != expected=0x%08X\n", 429 val, hw_rev->cidr_0123); 430 rc = -EINVAL; 431 goto post_pm_err; 432 } 433 sig_cidr = val; 434 435 /* Check HW engine configuration */ 436 val = cc_ioread(new_drvdata, CC_REG(HOST_REMOVE_INPUT_PINS)); 437 switch (val) { 438 case CC_PINS_FULL: 439 /* This is fine */ 440 break; 441 case CC_PINS_SLIM: 442 if (new_drvdata->std_bodies & CC_STD_NIST) { 443 dev_warn(dev, "703 mode forced due to HW configuration.\n"); 444 new_drvdata->std_bodies = CC_STD_OSCCA; 445 } 446 break; 447 default: 448 dev_err(dev, "Unsupported engines configuration.\n"); 449 rc = -EINVAL; 450 goto post_pm_err; 451 } 452 453 /* Check security disable state */ 454 val = cc_ioread(new_drvdata, CC_REG(SECURITY_DISABLED)); 455 val &= CC_SECURITY_DISABLED_MASK; 456 new_drvdata->sec_disabled |= !!val; 457 458 if (!new_drvdata->sec_disabled) { 459 new_drvdata->comp_mask |= CC_CPP_SM4_ABORT_MASK; 460 if (new_drvdata->std_bodies & CC_STD_NIST) 461 new_drvdata->comp_mask |= CC_CPP_AES_ABORT_MASK; 462 } 463 } 464 465 if (new_drvdata->sec_disabled) 466 dev_info(dev, "Security Disabled mode is in effect. Security functions disabled.\n"); 467 468 /* Display HW versions */ 469 dev_info(dev, "ARM CryptoCell %s Driver: HW version 0x%08X/0x%8X, Driver version %s\n", 470 hw_rev->name, hw_rev_pidr, sig_cidr, DRV_MODULE_VERSION); 471 /* register the driver isr function */ 472 rc = devm_request_irq(dev, irq, cc_isr, IRQF_SHARED, "ccree", 473 new_drvdata); 474 if (rc) { 475 dev_err(dev, "Could not register to interrupt %d\n", irq); 476 goto post_pm_err; 477 } 478 dev_dbg(dev, "Registered to IRQ: %d\n", irq); 479 480 init_cc_cache_params(new_drvdata); 481 482 rc = init_cc_regs(new_drvdata); 483 if (rc) { 484 dev_err(dev, "init_cc_regs failed\n"); 485 goto post_pm_err; 486 } 487 488 rc = cc_debugfs_init(new_drvdata); 489 if (rc) { 490 dev_err(dev, "Failed registering debugfs interface\n"); 491 goto post_regs_err; 492 } 493 494 rc = cc_fips_init(new_drvdata); 495 if (rc) { 496 dev_err(dev, "cc_fips_init failed 0x%x\n", rc); 497 goto post_debugfs_err; 498 } 499 rc = cc_sram_mgr_init(new_drvdata); 500 if (rc) { 501 dev_err(dev, "cc_sram_mgr_init failed\n"); 502 goto post_fips_init_err; 503 } 504 505 new_drvdata->mlli_sram_addr = 506 cc_sram_alloc(new_drvdata, MAX_MLLI_BUFF_SIZE); 507 if (new_drvdata->mlli_sram_addr == NULL_SRAM_ADDR) { 508 rc = -ENOMEM; 509 goto post_fips_init_err; 510 } 511 512 rc = cc_req_mgr_init(new_drvdata); 513 if (rc) { 514 dev_err(dev, "cc_req_mgr_init failed\n"); 515 goto post_fips_init_err; 516 } 517 518 rc = cc_buffer_mgr_init(new_drvdata); 519 if (rc) { 520 dev_err(dev, "cc_buffer_mgr_init failed\n"); 521 goto post_req_mgr_err; 522 } 523 524 /* hash must be allocated first due to use of send_request_init() 525 * and dependency of AEAD on it 526 */ 527 rc = cc_hash_alloc(new_drvdata); 528 if (rc) { 529 dev_err(dev, "cc_hash_alloc failed\n"); 530 goto post_buf_mgr_err; 531 } 532 533 /* Allocate crypto algs */ 534 rc = cc_cipher_alloc(new_drvdata); 535 if (rc) { 536 dev_err(dev, "cc_cipher_alloc failed\n"); 537 goto post_hash_err; 538 } 539 540 rc = cc_aead_alloc(new_drvdata); 541 if (rc) { 542 dev_err(dev, "cc_aead_alloc failed\n"); 543 goto post_cipher_err; 544 } 545 546 /* If we got here and FIPS mode is enabled 547 * it means all FIPS test passed, so let TEE 548 * know we're good. 549 */ 550 cc_set_ree_fips_status(new_drvdata, true); 551 552 pm_runtime_put(dev); 553 return 0; 554 555 post_cipher_err: 556 cc_cipher_free(new_drvdata); 557 post_hash_err: 558 cc_hash_free(new_drvdata); 559 post_buf_mgr_err: 560 cc_buffer_mgr_fini(new_drvdata); 561 post_req_mgr_err: 562 cc_req_mgr_fini(new_drvdata); 563 post_fips_init_err: 564 cc_fips_fini(new_drvdata); 565 post_debugfs_err: 566 cc_debugfs_fini(new_drvdata); 567 post_regs_err: 568 fini_cc_regs(new_drvdata); 569 post_pm_err: 570 pm_runtime_put_noidle(dev); 571 pm_runtime_disable(dev); 572 pm_runtime_set_suspended(dev); 573 clk_disable_unprepare(new_drvdata->clk); 574 return rc; 575 } 576 577 void fini_cc_regs(struct cc_drvdata *drvdata) 578 { 579 /* Mask all interrupts */ 580 cc_iowrite(drvdata, CC_REG(HOST_IMR), 0xFFFFFFFF); 581 } 582 583 static void cleanup_cc_resources(struct platform_device *plat_dev) 584 { 585 struct device *dev = &plat_dev->dev; 586 struct cc_drvdata *drvdata = 587 (struct cc_drvdata *)platform_get_drvdata(plat_dev); 588 589 cc_aead_free(drvdata); 590 cc_cipher_free(drvdata); 591 cc_hash_free(drvdata); 592 cc_buffer_mgr_fini(drvdata); 593 cc_req_mgr_fini(drvdata); 594 cc_fips_fini(drvdata); 595 cc_debugfs_fini(drvdata); 596 fini_cc_regs(drvdata); 597 pm_runtime_put_noidle(dev); 598 pm_runtime_disable(dev); 599 pm_runtime_set_suspended(dev); 600 clk_disable_unprepare(drvdata->clk); 601 } 602 603 unsigned int cc_get_default_hash_len(struct cc_drvdata *drvdata) 604 { 605 if (drvdata->hw_rev >= CC_HW_REV_712) 606 return HASH_LEN_SIZE_712; 607 else 608 return HASH_LEN_SIZE_630; 609 } 610 611 static int ccree_probe(struct platform_device *plat_dev) 612 { 613 int rc; 614 struct device *dev = &plat_dev->dev; 615 616 /* Map registers space */ 617 rc = init_cc_resources(plat_dev); 618 if (rc) 619 return rc; 620 621 dev_info(dev, "ARM ccree device initialized\n"); 622 623 return 0; 624 } 625 626 static int ccree_remove(struct platform_device *plat_dev) 627 { 628 struct device *dev = &plat_dev->dev; 629 630 dev_dbg(dev, "Releasing ccree resources...\n"); 631 632 cleanup_cc_resources(plat_dev); 633 634 dev_info(dev, "ARM ccree device terminated\n"); 635 636 return 0; 637 } 638 639 static struct platform_driver ccree_driver = { 640 .driver = { 641 .name = "ccree", 642 .of_match_table = arm_ccree_dev_of_match, 643 #ifdef CONFIG_PM 644 .pm = &ccree_pm, 645 #endif 646 }, 647 .probe = ccree_probe, 648 .remove = ccree_remove, 649 }; 650 651 static int __init ccree_init(void) 652 { 653 int rc; 654 655 cc_debugfs_global_init(); 656 657 rc = platform_driver_register(&ccree_driver); 658 if (rc) { 659 cc_debugfs_global_fini(); 660 return rc; 661 } 662 663 return 0; 664 } 665 module_init(ccree_init); 666 667 static void __exit ccree_exit(void) 668 { 669 platform_driver_unregister(&ccree_driver); 670 cc_debugfs_global_fini(); 671 } 672 module_exit(ccree_exit); 673 674 /* Module description */ 675 MODULE_DESCRIPTION("ARM TrustZone CryptoCell REE Driver"); 676 MODULE_VERSION(DRV_MODULE_VERSION); 677 MODULE_AUTHOR("ARM"); 678 MODULE_LICENSE("GPL v2"); 679