1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Xilinx Zynq MPSoC Firmware layer 4 * 5 * Copyright (C) 2014-2021 Xilinx, Inc. 6 * 7 * Michal Simek <michal.simek@xilinx.com> 8 * Davorin Mista <davorin.mista@aggios.com> 9 * Jolly Shah <jollys@xilinx.com> 10 * Rajan Vaja <rajanv@xilinx.com> 11 */ 12 13 #include <linux/arm-smccc.h> 14 #include <linux/compiler.h> 15 #include <linux/device.h> 16 #include <linux/init.h> 17 #include <linux/mfd/core.h> 18 #include <linux/module.h> 19 #include <linux/of.h> 20 #include <linux/of_platform.h> 21 #include <linux/slab.h> 22 #include <linux/uaccess.h> 23 #include <linux/hashtable.h> 24 25 #include <linux/firmware/xlnx-zynqmp.h> 26 #include "zynqmp-debug.h" 27 28 /* Max HashMap Order for PM API feature check (1<<7 = 128) */ 29 #define PM_API_FEATURE_CHECK_MAX_ORDER 7 30 31 static bool feature_check_enabled; 32 static DEFINE_HASHTABLE(pm_api_features_map, PM_API_FEATURE_CHECK_MAX_ORDER); 33 34 /** 35 * struct pm_api_feature_data - PM API Feature data 36 * @pm_api_id: PM API Id, used as key to index into hashmap 37 * @feature_status: status of PM API feature: valid, invalid 38 * @hentry: hlist_node that hooks this entry into hashtable 39 */ 40 struct pm_api_feature_data { 41 u32 pm_api_id; 42 int feature_status; 43 struct hlist_node hentry; 44 }; 45 46 static const struct mfd_cell firmware_devs[] = { 47 { 48 .name = "zynqmp_power_controller", 49 }, 50 }; 51 52 /** 53 * zynqmp_pm_ret_code() - Convert PMU-FW error codes to Linux error codes 54 * @ret_status: PMUFW return code 55 * 56 * Return: corresponding Linux error code 57 */ 58 static int zynqmp_pm_ret_code(u32 ret_status) 59 { 60 switch (ret_status) { 61 case XST_PM_SUCCESS: 62 case XST_PM_DOUBLE_REQ: 63 return 0; 64 case XST_PM_NO_FEATURE: 65 return -ENOTSUPP; 66 case XST_PM_NO_ACCESS: 67 return -EACCES; 68 case XST_PM_ABORT_SUSPEND: 69 return -ECANCELED; 70 case XST_PM_MULT_USER: 71 return -EUSERS; 72 case XST_PM_INTERNAL: 73 case XST_PM_CONFLICT: 74 case XST_PM_INVALID_NODE: 75 default: 76 return -EINVAL; 77 } 78 } 79 80 static noinline int do_fw_call_fail(u64 arg0, u64 arg1, u64 arg2, 81 u32 *ret_payload) 82 { 83 return -ENODEV; 84 } 85 86 /* 87 * PM function call wrapper 88 * Invoke do_fw_call_smc or do_fw_call_hvc, depending on the configuration 89 */ 90 static int (*do_fw_call)(u64, u64, u64, u32 *ret_payload) = do_fw_call_fail; 91 92 /** 93 * do_fw_call_smc() - Call system-level platform management layer (SMC) 94 * @arg0: Argument 0 to SMC call 95 * @arg1: Argument 1 to SMC call 96 * @arg2: Argument 2 to SMC call 97 * @ret_payload: Returned value array 98 * 99 * Invoke platform management function via SMC call (no hypervisor present). 100 * 101 * Return: Returns status, either success or error+reason 102 */ 103 static noinline int do_fw_call_smc(u64 arg0, u64 arg1, u64 arg2, 104 u32 *ret_payload) 105 { 106 struct arm_smccc_res res; 107 108 arm_smccc_smc(arg0, arg1, arg2, 0, 0, 0, 0, 0, &res); 109 110 if (ret_payload) { 111 ret_payload[0] = lower_32_bits(res.a0); 112 ret_payload[1] = upper_32_bits(res.a0); 113 ret_payload[2] = lower_32_bits(res.a1); 114 ret_payload[3] = upper_32_bits(res.a1); 115 } 116 117 return zynqmp_pm_ret_code((enum pm_ret_status)res.a0); 118 } 119 120 /** 121 * do_fw_call_hvc() - Call system-level platform management layer (HVC) 122 * @arg0: Argument 0 to HVC call 123 * @arg1: Argument 1 to HVC call 124 * @arg2: Argument 2 to HVC call 125 * @ret_payload: Returned value array 126 * 127 * Invoke platform management function via HVC 128 * HVC-based for communication through hypervisor 129 * (no direct communication with ATF). 130 * 131 * Return: Returns status, either success or error+reason 132 */ 133 static noinline int do_fw_call_hvc(u64 arg0, u64 arg1, u64 arg2, 134 u32 *ret_payload) 135 { 136 struct arm_smccc_res res; 137 138 arm_smccc_hvc(arg0, arg1, arg2, 0, 0, 0, 0, 0, &res); 139 140 if (ret_payload) { 141 ret_payload[0] = lower_32_bits(res.a0); 142 ret_payload[1] = upper_32_bits(res.a0); 143 ret_payload[2] = lower_32_bits(res.a1); 144 ret_payload[3] = upper_32_bits(res.a1); 145 } 146 147 return zynqmp_pm_ret_code((enum pm_ret_status)res.a0); 148 } 149 150 /** 151 * zynqmp_pm_feature() - Check weather given feature is supported or not 152 * @api_id: API ID to check 153 * 154 * Return: Returns status, either success or error+reason 155 */ 156 static int zynqmp_pm_feature(u32 api_id) 157 { 158 int ret; 159 u32 ret_payload[PAYLOAD_ARG_CNT]; 160 u64 smc_arg[2]; 161 struct pm_api_feature_data *feature_data; 162 163 if (!feature_check_enabled) 164 return 0; 165 166 /* Check for existing entry in hash table for given api */ 167 hash_for_each_possible(pm_api_features_map, feature_data, hentry, 168 api_id) { 169 if (feature_data->pm_api_id == api_id) 170 return feature_data->feature_status; 171 } 172 173 /* Add new entry if not present */ 174 feature_data = kmalloc(sizeof(*feature_data), GFP_KERNEL); 175 if (!feature_data) 176 return -ENOMEM; 177 178 feature_data->pm_api_id = api_id; 179 smc_arg[0] = PM_SIP_SVC | PM_FEATURE_CHECK; 180 smc_arg[1] = api_id; 181 182 ret = do_fw_call(smc_arg[0], smc_arg[1], 0, ret_payload); 183 if (ret) 184 ret = -EOPNOTSUPP; 185 else 186 ret = ret_payload[1]; 187 188 feature_data->feature_status = ret; 189 hash_add(pm_api_features_map, &feature_data->hentry, api_id); 190 191 return ret; 192 } 193 194 /** 195 * zynqmp_pm_invoke_fn() - Invoke the system-level platform management layer 196 * caller function depending on the configuration 197 * @pm_api_id: Requested PM-API call 198 * @arg0: Argument 0 to requested PM-API call 199 * @arg1: Argument 1 to requested PM-API call 200 * @arg2: Argument 2 to requested PM-API call 201 * @arg3: Argument 3 to requested PM-API call 202 * @ret_payload: Returned value array 203 * 204 * Invoke platform management function for SMC or HVC call, depending on 205 * configuration. 206 * Following SMC Calling Convention (SMCCC) for SMC64: 207 * Pm Function Identifier, 208 * PM_SIP_SVC + PM_API_ID = 209 * ((SMC_TYPE_FAST << FUNCID_TYPE_SHIFT) 210 * ((SMC_64) << FUNCID_CC_SHIFT) 211 * ((SIP_START) << FUNCID_OEN_SHIFT) 212 * ((PM_API_ID) & FUNCID_NUM_MASK)) 213 * 214 * PM_SIP_SVC - Registered ZynqMP SIP Service Call. 215 * PM_API_ID - Platform Management API ID. 216 * 217 * Return: Returns status, either success or error+reason 218 */ 219 int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1, 220 u32 arg2, u32 arg3, u32 *ret_payload) 221 { 222 /* 223 * Added SIP service call Function Identifier 224 * Make sure to stay in x0 register 225 */ 226 u64 smc_arg[4]; 227 int ret; 228 229 /* Check if feature is supported or not */ 230 ret = zynqmp_pm_feature(pm_api_id); 231 if (ret < 0) 232 return ret; 233 234 smc_arg[0] = PM_SIP_SVC | pm_api_id; 235 smc_arg[1] = ((u64)arg1 << 32) | arg0; 236 smc_arg[2] = ((u64)arg3 << 32) | arg2; 237 238 return do_fw_call(smc_arg[0], smc_arg[1], smc_arg[2], ret_payload); 239 } 240 241 static u32 pm_api_version; 242 static u32 pm_tz_version; 243 244 /** 245 * zynqmp_pm_get_api_version() - Get version number of PMU PM firmware 246 * @version: Returned version value 247 * 248 * Return: Returns status, either success or error+reason 249 */ 250 int zynqmp_pm_get_api_version(u32 *version) 251 { 252 u32 ret_payload[PAYLOAD_ARG_CNT]; 253 int ret; 254 255 if (!version) 256 return -EINVAL; 257 258 /* Check is PM API version already verified */ 259 if (pm_api_version > 0) { 260 *version = pm_api_version; 261 return 0; 262 } 263 ret = zynqmp_pm_invoke_fn(PM_GET_API_VERSION, 0, 0, 0, 0, ret_payload); 264 *version = ret_payload[1]; 265 266 return ret; 267 } 268 EXPORT_SYMBOL_GPL(zynqmp_pm_get_api_version); 269 270 /** 271 * zynqmp_pm_get_chipid - Get silicon ID registers 272 * @idcode: IDCODE register 273 * @version: version register 274 * 275 * Return: Returns the status of the operation and the idcode and version 276 * registers in @idcode and @version. 277 */ 278 int zynqmp_pm_get_chipid(u32 *idcode, u32 *version) 279 { 280 u32 ret_payload[PAYLOAD_ARG_CNT]; 281 int ret; 282 283 if (!idcode || !version) 284 return -EINVAL; 285 286 ret = zynqmp_pm_invoke_fn(PM_GET_CHIPID, 0, 0, 0, 0, ret_payload); 287 *idcode = ret_payload[1]; 288 *version = ret_payload[2]; 289 290 return ret; 291 } 292 EXPORT_SYMBOL_GPL(zynqmp_pm_get_chipid); 293 294 /** 295 * zynqmp_pm_get_trustzone_version() - Get secure trustzone firmware version 296 * @version: Returned version value 297 * 298 * Return: Returns status, either success or error+reason 299 */ 300 static int zynqmp_pm_get_trustzone_version(u32 *version) 301 { 302 u32 ret_payload[PAYLOAD_ARG_CNT]; 303 int ret; 304 305 if (!version) 306 return -EINVAL; 307 308 /* Check is PM trustzone version already verified */ 309 if (pm_tz_version > 0) { 310 *version = pm_tz_version; 311 return 0; 312 } 313 ret = zynqmp_pm_invoke_fn(PM_GET_TRUSTZONE_VERSION, 0, 0, 314 0, 0, ret_payload); 315 *version = ret_payload[1]; 316 317 return ret; 318 } 319 320 /** 321 * get_set_conduit_method() - Choose SMC or HVC based communication 322 * @np: Pointer to the device_node structure 323 * 324 * Use SMC or HVC-based functions to communicate with EL2/EL3. 325 * 326 * Return: Returns 0 on success or error code 327 */ 328 static int get_set_conduit_method(struct device_node *np) 329 { 330 const char *method; 331 332 if (of_property_read_string(np, "method", &method)) { 333 pr_warn("%s missing \"method\" property\n", __func__); 334 return -ENXIO; 335 } 336 337 if (!strcmp("hvc", method)) { 338 do_fw_call = do_fw_call_hvc; 339 } else if (!strcmp("smc", method)) { 340 do_fw_call = do_fw_call_smc; 341 } else { 342 pr_warn("%s Invalid \"method\" property: %s\n", 343 __func__, method); 344 return -EINVAL; 345 } 346 347 return 0; 348 } 349 350 /** 351 * zynqmp_pm_query_data() - Get query data from firmware 352 * @qdata: Variable to the zynqmp_pm_query_data structure 353 * @out: Returned output value 354 * 355 * Return: Returns status, either success or error+reason 356 */ 357 int zynqmp_pm_query_data(struct zynqmp_pm_query_data qdata, u32 *out) 358 { 359 int ret; 360 361 ret = zynqmp_pm_invoke_fn(PM_QUERY_DATA, qdata.qid, qdata.arg1, 362 qdata.arg2, qdata.arg3, out); 363 364 /* 365 * For clock name query, all bytes in SMC response are clock name 366 * characters and return code is always success. For invalid clocks, 367 * clock name bytes would be zeros. 368 */ 369 return qdata.qid == PM_QID_CLOCK_GET_NAME ? 0 : ret; 370 } 371 EXPORT_SYMBOL_GPL(zynqmp_pm_query_data); 372 373 /** 374 * zynqmp_pm_clock_enable() - Enable the clock for given id 375 * @clock_id: ID of the clock to be enabled 376 * 377 * This function is used by master to enable the clock 378 * including peripherals and PLL clocks. 379 * 380 * Return: Returns status, either success or error+reason 381 */ 382 int zynqmp_pm_clock_enable(u32 clock_id) 383 { 384 return zynqmp_pm_invoke_fn(PM_CLOCK_ENABLE, clock_id, 0, 0, 0, NULL); 385 } 386 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_enable); 387 388 /** 389 * zynqmp_pm_clock_disable() - Disable the clock for given id 390 * @clock_id: ID of the clock to be disable 391 * 392 * This function is used by master to disable the clock 393 * including peripherals and PLL clocks. 394 * 395 * Return: Returns status, either success or error+reason 396 */ 397 int zynqmp_pm_clock_disable(u32 clock_id) 398 { 399 return zynqmp_pm_invoke_fn(PM_CLOCK_DISABLE, clock_id, 0, 0, 0, NULL); 400 } 401 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_disable); 402 403 /** 404 * zynqmp_pm_clock_getstate() - Get the clock state for given id 405 * @clock_id: ID of the clock to be queried 406 * @state: 1/0 (Enabled/Disabled) 407 * 408 * This function is used by master to get the state of clock 409 * including peripherals and PLL clocks. 410 * 411 * Return: Returns status, either success or error+reason 412 */ 413 int zynqmp_pm_clock_getstate(u32 clock_id, u32 *state) 414 { 415 u32 ret_payload[PAYLOAD_ARG_CNT]; 416 int ret; 417 418 ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETSTATE, clock_id, 0, 419 0, 0, ret_payload); 420 *state = ret_payload[1]; 421 422 return ret; 423 } 424 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getstate); 425 426 /** 427 * zynqmp_pm_clock_setdivider() - Set the clock divider for given id 428 * @clock_id: ID of the clock 429 * @divider: divider value 430 * 431 * This function is used by master to set divider for any clock 432 * to achieve desired rate. 433 * 434 * Return: Returns status, either success or error+reason 435 */ 436 int zynqmp_pm_clock_setdivider(u32 clock_id, u32 divider) 437 { 438 return zynqmp_pm_invoke_fn(PM_CLOCK_SETDIVIDER, clock_id, divider, 439 0, 0, NULL); 440 } 441 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_setdivider); 442 443 /** 444 * zynqmp_pm_clock_getdivider() - Get the clock divider for given id 445 * @clock_id: ID of the clock 446 * @divider: divider value 447 * 448 * This function is used by master to get divider values 449 * for any clock. 450 * 451 * Return: Returns status, either success or error+reason 452 */ 453 int zynqmp_pm_clock_getdivider(u32 clock_id, u32 *divider) 454 { 455 u32 ret_payload[PAYLOAD_ARG_CNT]; 456 int ret; 457 458 ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETDIVIDER, clock_id, 0, 459 0, 0, ret_payload); 460 *divider = ret_payload[1]; 461 462 return ret; 463 } 464 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getdivider); 465 466 /** 467 * zynqmp_pm_clock_setrate() - Set the clock rate for given id 468 * @clock_id: ID of the clock 469 * @rate: rate value in hz 470 * 471 * This function is used by master to set rate for any clock. 472 * 473 * Return: Returns status, either success or error+reason 474 */ 475 int zynqmp_pm_clock_setrate(u32 clock_id, u64 rate) 476 { 477 return zynqmp_pm_invoke_fn(PM_CLOCK_SETRATE, clock_id, 478 lower_32_bits(rate), 479 upper_32_bits(rate), 480 0, NULL); 481 } 482 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_setrate); 483 484 /** 485 * zynqmp_pm_clock_getrate() - Get the clock rate for given id 486 * @clock_id: ID of the clock 487 * @rate: rate value in hz 488 * 489 * This function is used by master to get rate 490 * for any clock. 491 * 492 * Return: Returns status, either success or error+reason 493 */ 494 int zynqmp_pm_clock_getrate(u32 clock_id, u64 *rate) 495 { 496 u32 ret_payload[PAYLOAD_ARG_CNT]; 497 int ret; 498 499 ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETRATE, clock_id, 0, 500 0, 0, ret_payload); 501 *rate = ((u64)ret_payload[2] << 32) | ret_payload[1]; 502 503 return ret; 504 } 505 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getrate); 506 507 /** 508 * zynqmp_pm_clock_setparent() - Set the clock parent for given id 509 * @clock_id: ID of the clock 510 * @parent_id: parent id 511 * 512 * This function is used by master to set parent for any clock. 513 * 514 * Return: Returns status, either success or error+reason 515 */ 516 int zynqmp_pm_clock_setparent(u32 clock_id, u32 parent_id) 517 { 518 return zynqmp_pm_invoke_fn(PM_CLOCK_SETPARENT, clock_id, 519 parent_id, 0, 0, NULL); 520 } 521 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_setparent); 522 523 /** 524 * zynqmp_pm_clock_getparent() - Get the clock parent for given id 525 * @clock_id: ID of the clock 526 * @parent_id: parent id 527 * 528 * This function is used by master to get parent index 529 * for any clock. 530 * 531 * Return: Returns status, either success or error+reason 532 */ 533 int zynqmp_pm_clock_getparent(u32 clock_id, u32 *parent_id) 534 { 535 u32 ret_payload[PAYLOAD_ARG_CNT]; 536 int ret; 537 538 ret = zynqmp_pm_invoke_fn(PM_CLOCK_GETPARENT, clock_id, 0, 539 0, 0, ret_payload); 540 *parent_id = ret_payload[1]; 541 542 return ret; 543 } 544 EXPORT_SYMBOL_GPL(zynqmp_pm_clock_getparent); 545 546 /** 547 * zynqmp_pm_set_pll_frac_mode() - PM API for set PLL mode 548 * 549 * @clk_id: PLL clock ID 550 * @mode: PLL mode (PLL_MODE_FRAC/PLL_MODE_INT) 551 * 552 * This function sets PLL mode 553 * 554 * Return: Returns status, either success or error+reason 555 */ 556 int zynqmp_pm_set_pll_frac_mode(u32 clk_id, u32 mode) 557 { 558 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_SET_PLL_FRAC_MODE, 559 clk_id, mode, NULL); 560 } 561 EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_mode); 562 563 /** 564 * zynqmp_pm_get_pll_frac_mode() - PM API for get PLL mode 565 * 566 * @clk_id: PLL clock ID 567 * @mode: PLL mode 568 * 569 * This function return current PLL mode 570 * 571 * Return: Returns status, either success or error+reason 572 */ 573 int zynqmp_pm_get_pll_frac_mode(u32 clk_id, u32 *mode) 574 { 575 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_GET_PLL_FRAC_MODE, 576 clk_id, 0, mode); 577 } 578 EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_mode); 579 580 /** 581 * zynqmp_pm_set_pll_frac_data() - PM API for setting pll fraction data 582 * 583 * @clk_id: PLL clock ID 584 * @data: fraction data 585 * 586 * This function sets fraction data. 587 * It is valid for fraction mode only. 588 * 589 * Return: Returns status, either success or error+reason 590 */ 591 int zynqmp_pm_set_pll_frac_data(u32 clk_id, u32 data) 592 { 593 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_SET_PLL_FRAC_DATA, 594 clk_id, data, NULL); 595 } 596 EXPORT_SYMBOL_GPL(zynqmp_pm_set_pll_frac_data); 597 598 /** 599 * zynqmp_pm_get_pll_frac_data() - PM API for getting pll fraction data 600 * 601 * @clk_id: PLL clock ID 602 * @data: fraction data 603 * 604 * This function returns fraction data value. 605 * 606 * Return: Returns status, either success or error+reason 607 */ 608 int zynqmp_pm_get_pll_frac_data(u32 clk_id, u32 *data) 609 { 610 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_GET_PLL_FRAC_DATA, 611 clk_id, 0, data); 612 } 613 EXPORT_SYMBOL_GPL(zynqmp_pm_get_pll_frac_data); 614 615 /** 616 * zynqmp_pm_set_sd_tapdelay() - Set tap delay for the SD device 617 * 618 * @node_id: Node ID of the device 619 * @type: Type of tap delay to set (input/output) 620 * @value: Value to set fot the tap delay 621 * 622 * This function sets input/output tap delay for the SD device. 623 * 624 * Return: Returns status, either success or error+reason 625 */ 626 int zynqmp_pm_set_sd_tapdelay(u32 node_id, u32 type, u32 value) 627 { 628 return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, IOCTL_SET_SD_TAPDELAY, 629 type, value, NULL); 630 } 631 EXPORT_SYMBOL_GPL(zynqmp_pm_set_sd_tapdelay); 632 633 /** 634 * zynqmp_pm_sd_dll_reset() - Reset DLL logic 635 * 636 * @node_id: Node ID of the device 637 * @type: Reset type 638 * 639 * This function resets DLL logic for the SD device. 640 * 641 * Return: Returns status, either success or error+reason 642 */ 643 int zynqmp_pm_sd_dll_reset(u32 node_id, u32 type) 644 { 645 return zynqmp_pm_invoke_fn(PM_IOCTL, node_id, IOCTL_SD_DLL_RESET, 646 type, 0, NULL); 647 } 648 EXPORT_SYMBOL_GPL(zynqmp_pm_sd_dll_reset); 649 650 /** 651 * zynqmp_pm_write_ggs() - PM API for writing global general storage (ggs) 652 * @index: GGS register index 653 * @value: Register value to be written 654 * 655 * This function writes value to GGS register. 656 * 657 * Return: Returns status, either success or error+reason 658 */ 659 int zynqmp_pm_write_ggs(u32 index, u32 value) 660 { 661 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_GGS, 662 index, value, NULL); 663 } 664 EXPORT_SYMBOL_GPL(zynqmp_pm_write_ggs); 665 666 /** 667 * zynqmp_pm_write_ggs() - PM API for reading global general storage (ggs) 668 * @index: GGS register index 669 * @value: Register value to be written 670 * 671 * This function returns GGS register value. 672 * 673 * Return: Returns status, either success or error+reason 674 */ 675 int zynqmp_pm_read_ggs(u32 index, u32 *value) 676 { 677 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_GGS, 678 index, 0, value); 679 } 680 EXPORT_SYMBOL_GPL(zynqmp_pm_read_ggs); 681 682 /** 683 * zynqmp_pm_write_pggs() - PM API for writing persistent global general 684 * storage (pggs) 685 * @index: PGGS register index 686 * @value: Register value to be written 687 * 688 * This function writes value to PGGS register. 689 * 690 * Return: Returns status, either success or error+reason 691 */ 692 int zynqmp_pm_write_pggs(u32 index, u32 value) 693 { 694 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_WRITE_PGGS, index, value, 695 NULL); 696 } 697 EXPORT_SYMBOL_GPL(zynqmp_pm_write_pggs); 698 699 /** 700 * zynqmp_pm_write_pggs() - PM API for reading persistent global general 701 * storage (pggs) 702 * @index: PGGS register index 703 * @value: Register value to be written 704 * 705 * This function returns PGGS register value. 706 * 707 * Return: Returns status, either success or error+reason 708 */ 709 int zynqmp_pm_read_pggs(u32 index, u32 *value) 710 { 711 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_READ_PGGS, index, 0, 712 value); 713 } 714 EXPORT_SYMBOL_GPL(zynqmp_pm_read_pggs); 715 716 /** 717 * zynqmp_pm_set_boot_health_status() - PM API for setting healthy boot status 718 * @value: Status value to be written 719 * 720 * This function sets healthy bit value to indicate boot health status 721 * to firmware. 722 * 723 * Return: Returns status, either success or error+reason 724 */ 725 int zynqmp_pm_set_boot_health_status(u32 value) 726 { 727 return zynqmp_pm_invoke_fn(PM_IOCTL, 0, IOCTL_SET_BOOT_HEALTH_STATUS, 728 value, 0, NULL); 729 } 730 731 /** 732 * zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release) 733 * @reset: Reset to be configured 734 * @assert_flag: Flag stating should reset be asserted (1) or 735 * released (0) 736 * 737 * Return: Returns status, either success or error+reason 738 */ 739 int zynqmp_pm_reset_assert(const enum zynqmp_pm_reset reset, 740 const enum zynqmp_pm_reset_action assert_flag) 741 { 742 return zynqmp_pm_invoke_fn(PM_RESET_ASSERT, reset, assert_flag, 743 0, 0, NULL); 744 } 745 EXPORT_SYMBOL_GPL(zynqmp_pm_reset_assert); 746 747 /** 748 * zynqmp_pm_reset_get_status - Get status of the reset 749 * @reset: Reset whose status should be returned 750 * @status: Returned status 751 * 752 * Return: Returns status, either success or error+reason 753 */ 754 int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset, u32 *status) 755 { 756 u32 ret_payload[PAYLOAD_ARG_CNT]; 757 int ret; 758 759 if (!status) 760 return -EINVAL; 761 762 ret = zynqmp_pm_invoke_fn(PM_RESET_GET_STATUS, reset, 0, 763 0, 0, ret_payload); 764 *status = ret_payload[1]; 765 766 return ret; 767 } 768 EXPORT_SYMBOL_GPL(zynqmp_pm_reset_get_status); 769 770 /** 771 * zynqmp_pm_fpga_load - Perform the fpga load 772 * @address: Address to write to 773 * @size: pl bitstream size 774 * @flags: Bitstream type 775 * -XILINX_ZYNQMP_PM_FPGA_FULL: FPGA full reconfiguration 776 * -XILINX_ZYNQMP_PM_FPGA_PARTIAL: FPGA partial reconfiguration 777 * 778 * This function provides access to pmufw. To transfer 779 * the required bitstream into PL. 780 * 781 * Return: Returns status, either success or error+reason 782 */ 783 int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags) 784 { 785 return zynqmp_pm_invoke_fn(PM_FPGA_LOAD, lower_32_bits(address), 786 upper_32_bits(address), size, flags, NULL); 787 } 788 EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_load); 789 790 /** 791 * zynqmp_pm_fpga_get_status - Read value from PCAP status register 792 * @value: Value to read 793 * 794 * This function provides access to the pmufw to get the PCAP 795 * status 796 * 797 * Return: Returns status, either success or error+reason 798 */ 799 int zynqmp_pm_fpga_get_status(u32 *value) 800 { 801 u32 ret_payload[PAYLOAD_ARG_CNT]; 802 int ret; 803 804 if (!value) 805 return -EINVAL; 806 807 ret = zynqmp_pm_invoke_fn(PM_FPGA_GET_STATUS, 0, 0, 0, 0, ret_payload); 808 *value = ret_payload[1]; 809 810 return ret; 811 } 812 EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status); 813 814 /** 815 * zynqmp_pm_pinctrl_request - Request Pin from firmware 816 * @pin: Pin number to request 817 * 818 * This function requests pin from firmware. 819 * 820 * Return: Returns status, either success or error+reason. 821 */ 822 int zynqmp_pm_pinctrl_request(const u32 pin) 823 { 824 return zynqmp_pm_invoke_fn(PM_PINCTRL_REQUEST, pin, 0, 0, 0, NULL); 825 } 826 EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_request); 827 828 /** 829 * zynqmp_pm_pinctrl_release - Inform firmware that Pin control is released 830 * @pin: Pin number to release 831 * 832 * This function release pin from firmware. 833 * 834 * Return: Returns status, either success or error+reason. 835 */ 836 int zynqmp_pm_pinctrl_release(const u32 pin) 837 { 838 return zynqmp_pm_invoke_fn(PM_PINCTRL_RELEASE, pin, 0, 0, 0, NULL); 839 } 840 EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_release); 841 842 /** 843 * zynqmp_pm_pinctrl_get_function - Read function id set for the given pin 844 * @pin: Pin number 845 * @id: Buffer to store function ID 846 * 847 * This function provides the function currently set for the given pin. 848 * 849 * Return: Returns status, either success or error+reason 850 */ 851 int zynqmp_pm_pinctrl_get_function(const u32 pin, u32 *id) 852 { 853 u32 ret_payload[PAYLOAD_ARG_CNT]; 854 int ret; 855 856 if (!id) 857 return -EINVAL; 858 859 ret = zynqmp_pm_invoke_fn(PM_PINCTRL_GET_FUNCTION, pin, 0, 860 0, 0, ret_payload); 861 *id = ret_payload[1]; 862 863 return ret; 864 } 865 EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_function); 866 867 /** 868 * zynqmp_pm_pinctrl_set_function - Set requested function for the pin 869 * @pin: Pin number 870 * @id: Function ID to set 871 * 872 * This function sets requested function for the given pin. 873 * 874 * Return: Returns status, either success or error+reason. 875 */ 876 int zynqmp_pm_pinctrl_set_function(const u32 pin, const u32 id) 877 { 878 return zynqmp_pm_invoke_fn(PM_PINCTRL_SET_FUNCTION, pin, id, 879 0, 0, NULL); 880 } 881 EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_function); 882 883 /** 884 * zynqmp_pm_pinctrl_get_config - Get configuration parameter for the pin 885 * @pin: Pin number 886 * @param: Parameter to get 887 * @value: Buffer to store parameter value 888 * 889 * This function gets requested configuration parameter for the given pin. 890 * 891 * Return: Returns status, either success or error+reason. 892 */ 893 int zynqmp_pm_pinctrl_get_config(const u32 pin, const u32 param, 894 u32 *value) 895 { 896 u32 ret_payload[PAYLOAD_ARG_CNT]; 897 int ret; 898 899 if (!value) 900 return -EINVAL; 901 902 ret = zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_GET, pin, param, 903 0, 0, ret_payload); 904 *value = ret_payload[1]; 905 906 return ret; 907 } 908 EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_get_config); 909 910 /** 911 * zynqmp_pm_pinctrl_set_config - Set configuration parameter for the pin 912 * @pin: Pin number 913 * @param: Parameter to set 914 * @value: Parameter value to set 915 * 916 * This function sets requested configuration parameter for the given pin. 917 * 918 * Return: Returns status, either success or error+reason. 919 */ 920 int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param, 921 u32 value) 922 { 923 return zynqmp_pm_invoke_fn(PM_PINCTRL_CONFIG_PARAM_SET, pin, 924 param, value, 0, NULL); 925 } 926 EXPORT_SYMBOL_GPL(zynqmp_pm_pinctrl_set_config); 927 928 /** 929 * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller 930 * master has initialized its own power management 931 * 932 * Return: Returns status, either success or error+reason 933 * 934 * This API function is to be used for notify the power management controller 935 * about the completed power management initialization. 936 */ 937 int zynqmp_pm_init_finalize(void) 938 { 939 return zynqmp_pm_invoke_fn(PM_PM_INIT_FINALIZE, 0, 0, 0, 0, NULL); 940 } 941 EXPORT_SYMBOL_GPL(zynqmp_pm_init_finalize); 942 943 /** 944 * zynqmp_pm_set_suspend_mode() - Set system suspend mode 945 * @mode: Mode to set for system suspend 946 * 947 * This API function is used to set mode of system suspend. 948 * 949 * Return: Returns status, either success or error+reason 950 */ 951 int zynqmp_pm_set_suspend_mode(u32 mode) 952 { 953 return zynqmp_pm_invoke_fn(PM_SET_SUSPEND_MODE, mode, 0, 0, 0, NULL); 954 } 955 EXPORT_SYMBOL_GPL(zynqmp_pm_set_suspend_mode); 956 957 /** 958 * zynqmp_pm_request_node() - Request a node with specific capabilities 959 * @node: Node ID of the slave 960 * @capabilities: Requested capabilities of the slave 961 * @qos: Quality of service (not supported) 962 * @ack: Flag to specify whether acknowledge is requested 963 * 964 * This function is used by master to request particular node from firmware. 965 * Every master must request node before using it. 966 * 967 * Return: Returns status, either success or error+reason 968 */ 969 int zynqmp_pm_request_node(const u32 node, const u32 capabilities, 970 const u32 qos, const enum zynqmp_pm_request_ack ack) 971 { 972 return zynqmp_pm_invoke_fn(PM_REQUEST_NODE, node, capabilities, 973 qos, ack, NULL); 974 } 975 EXPORT_SYMBOL_GPL(zynqmp_pm_request_node); 976 977 /** 978 * zynqmp_pm_release_node() - Release a node 979 * @node: Node ID of the slave 980 * 981 * This function is used by master to inform firmware that master 982 * has released node. Once released, master must not use that node 983 * without re-request. 984 * 985 * Return: Returns status, either success or error+reason 986 */ 987 int zynqmp_pm_release_node(const u32 node) 988 { 989 return zynqmp_pm_invoke_fn(PM_RELEASE_NODE, node, 0, 0, 0, NULL); 990 } 991 EXPORT_SYMBOL_GPL(zynqmp_pm_release_node); 992 993 /** 994 * zynqmp_pm_set_requirement() - PM call to set requirement for PM slaves 995 * @node: Node ID of the slave 996 * @capabilities: Requested capabilities of the slave 997 * @qos: Quality of service (not supported) 998 * @ack: Flag to specify whether acknowledge is requested 999 * 1000 * This API function is to be used for slaves a PU already has requested 1001 * to change its capabilities. 1002 * 1003 * Return: Returns status, either success or error+reason 1004 */ 1005 int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities, 1006 const u32 qos, 1007 const enum zynqmp_pm_request_ack ack) 1008 { 1009 return zynqmp_pm_invoke_fn(PM_SET_REQUIREMENT, node, capabilities, 1010 qos, ack, NULL); 1011 } 1012 EXPORT_SYMBOL_GPL(zynqmp_pm_set_requirement); 1013 1014 /** 1015 * zynqmp_pm_aes - Access AES hardware to encrypt/decrypt the data using 1016 * AES-GCM core. 1017 * @address: Address of the AesParams structure. 1018 * @out: Returned output value 1019 * 1020 * Return: Returns status, either success or error code. 1021 */ 1022 int zynqmp_pm_aes_engine(const u64 address, u32 *out) 1023 { 1024 u32 ret_payload[PAYLOAD_ARG_CNT]; 1025 int ret; 1026 1027 if (!out) 1028 return -EINVAL; 1029 1030 ret = zynqmp_pm_invoke_fn(PM_SECURE_AES, upper_32_bits(address), 1031 lower_32_bits(address), 1032 0, 0, ret_payload); 1033 *out = ret_payload[1]; 1034 1035 return ret; 1036 } 1037 EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine); 1038 1039 /** 1040 * zynqmp_pm_system_shutdown - PM call to request a system shutdown or restart 1041 * @type: Shutdown or restart? 0 for shutdown, 1 for restart 1042 * @subtype: Specifies which system should be restarted or shut down 1043 * 1044 * Return: Returns status, either success or error+reason 1045 */ 1046 int zynqmp_pm_system_shutdown(const u32 type, const u32 subtype) 1047 { 1048 return zynqmp_pm_invoke_fn(PM_SYSTEM_SHUTDOWN, type, subtype, 1049 0, 0, NULL); 1050 } 1051 1052 /** 1053 * struct zynqmp_pm_shutdown_scope - Struct for shutdown scope 1054 * @subtype: Shutdown subtype 1055 * @name: Matching string for scope argument 1056 * 1057 * This struct encapsulates mapping between shutdown scope ID and string. 1058 */ 1059 struct zynqmp_pm_shutdown_scope { 1060 const enum zynqmp_pm_shutdown_subtype subtype; 1061 const char *name; 1062 }; 1063 1064 static struct zynqmp_pm_shutdown_scope shutdown_scopes[] = { 1065 [ZYNQMP_PM_SHUTDOWN_SUBTYPE_SUBSYSTEM] = { 1066 .subtype = ZYNQMP_PM_SHUTDOWN_SUBTYPE_SUBSYSTEM, 1067 .name = "subsystem", 1068 }, 1069 [ZYNQMP_PM_SHUTDOWN_SUBTYPE_PS_ONLY] = { 1070 .subtype = ZYNQMP_PM_SHUTDOWN_SUBTYPE_PS_ONLY, 1071 .name = "ps_only", 1072 }, 1073 [ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM] = { 1074 .subtype = ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM, 1075 .name = "system", 1076 }, 1077 }; 1078 1079 static struct zynqmp_pm_shutdown_scope *selected_scope = 1080 &shutdown_scopes[ZYNQMP_PM_SHUTDOWN_SUBTYPE_SYSTEM]; 1081 1082 /** 1083 * zynqmp_pm_is_shutdown_scope_valid - Check if shutdown scope string is valid 1084 * @scope_string: Shutdown scope string 1085 * 1086 * Return: Return pointer to matching shutdown scope struct from 1087 * array of available options in system if string is valid, 1088 * otherwise returns NULL. 1089 */ 1090 static struct zynqmp_pm_shutdown_scope* 1091 zynqmp_pm_is_shutdown_scope_valid(const char *scope_string) 1092 { 1093 int count; 1094 1095 for (count = 0; count < ARRAY_SIZE(shutdown_scopes); count++) 1096 if (sysfs_streq(scope_string, shutdown_scopes[count].name)) 1097 return &shutdown_scopes[count]; 1098 1099 return NULL; 1100 } 1101 1102 static ssize_t shutdown_scope_show(struct device *device, 1103 struct device_attribute *attr, 1104 char *buf) 1105 { 1106 int i; 1107 1108 for (i = 0; i < ARRAY_SIZE(shutdown_scopes); i++) { 1109 if (&shutdown_scopes[i] == selected_scope) { 1110 strcat(buf, "["); 1111 strcat(buf, shutdown_scopes[i].name); 1112 strcat(buf, "]"); 1113 } else { 1114 strcat(buf, shutdown_scopes[i].name); 1115 } 1116 strcat(buf, " "); 1117 } 1118 strcat(buf, "\n"); 1119 1120 return strlen(buf); 1121 } 1122 1123 static ssize_t shutdown_scope_store(struct device *device, 1124 struct device_attribute *attr, 1125 const char *buf, size_t count) 1126 { 1127 int ret; 1128 struct zynqmp_pm_shutdown_scope *scope; 1129 1130 scope = zynqmp_pm_is_shutdown_scope_valid(buf); 1131 if (!scope) 1132 return -EINVAL; 1133 1134 ret = zynqmp_pm_system_shutdown(ZYNQMP_PM_SHUTDOWN_TYPE_SETSCOPE_ONLY, 1135 scope->subtype); 1136 if (ret) { 1137 pr_err("unable to set shutdown scope %s\n", buf); 1138 return ret; 1139 } 1140 1141 selected_scope = scope; 1142 1143 return count; 1144 } 1145 1146 static DEVICE_ATTR_RW(shutdown_scope); 1147 1148 static ssize_t health_status_store(struct device *device, 1149 struct device_attribute *attr, 1150 const char *buf, size_t count) 1151 { 1152 int ret; 1153 unsigned int value; 1154 1155 ret = kstrtouint(buf, 10, &value); 1156 if (ret) 1157 return ret; 1158 1159 ret = zynqmp_pm_set_boot_health_status(value); 1160 if (ret) { 1161 dev_err(device, "unable to set healthy bit value to %u\n", 1162 value); 1163 return ret; 1164 } 1165 1166 return count; 1167 } 1168 1169 static DEVICE_ATTR_WO(health_status); 1170 1171 static ssize_t ggs_show(struct device *device, 1172 struct device_attribute *attr, 1173 char *buf, 1174 u32 reg) 1175 { 1176 int ret; 1177 u32 ret_payload[PAYLOAD_ARG_CNT]; 1178 1179 ret = zynqmp_pm_read_ggs(reg, ret_payload); 1180 if (ret) 1181 return ret; 1182 1183 return sprintf(buf, "0x%x\n", ret_payload[1]); 1184 } 1185 1186 static ssize_t ggs_store(struct device *device, 1187 struct device_attribute *attr, 1188 const char *buf, size_t count, 1189 u32 reg) 1190 { 1191 long value; 1192 int ret; 1193 1194 if (reg >= GSS_NUM_REGS) 1195 return -EINVAL; 1196 1197 ret = kstrtol(buf, 16, &value); 1198 if (ret) { 1199 count = -EFAULT; 1200 goto err; 1201 } 1202 1203 ret = zynqmp_pm_write_ggs(reg, value); 1204 if (ret) 1205 count = -EFAULT; 1206 err: 1207 return count; 1208 } 1209 1210 /* GGS register show functions */ 1211 #define GGS0_SHOW(N) \ 1212 ssize_t ggs##N##_show(struct device *device, \ 1213 struct device_attribute *attr, \ 1214 char *buf) \ 1215 { \ 1216 return ggs_show(device, attr, buf, N); \ 1217 } 1218 1219 static GGS0_SHOW(0); 1220 static GGS0_SHOW(1); 1221 static GGS0_SHOW(2); 1222 static GGS0_SHOW(3); 1223 1224 /* GGS register store function */ 1225 #define GGS0_STORE(N) \ 1226 ssize_t ggs##N##_store(struct device *device, \ 1227 struct device_attribute *attr, \ 1228 const char *buf, \ 1229 size_t count) \ 1230 { \ 1231 return ggs_store(device, attr, buf, count, N); \ 1232 } 1233 1234 static GGS0_STORE(0); 1235 static GGS0_STORE(1); 1236 static GGS0_STORE(2); 1237 static GGS0_STORE(3); 1238 1239 static ssize_t pggs_show(struct device *device, 1240 struct device_attribute *attr, 1241 char *buf, 1242 u32 reg) 1243 { 1244 int ret; 1245 u32 ret_payload[PAYLOAD_ARG_CNT]; 1246 1247 ret = zynqmp_pm_read_pggs(reg, ret_payload); 1248 if (ret) 1249 return ret; 1250 1251 return sprintf(buf, "0x%x\n", ret_payload[1]); 1252 } 1253 1254 static ssize_t pggs_store(struct device *device, 1255 struct device_attribute *attr, 1256 const char *buf, size_t count, 1257 u32 reg) 1258 { 1259 long value; 1260 int ret; 1261 1262 if (reg >= GSS_NUM_REGS) 1263 return -EINVAL; 1264 1265 ret = kstrtol(buf, 16, &value); 1266 if (ret) { 1267 count = -EFAULT; 1268 goto err; 1269 } 1270 1271 ret = zynqmp_pm_write_pggs(reg, value); 1272 if (ret) 1273 count = -EFAULT; 1274 1275 err: 1276 return count; 1277 } 1278 1279 #define PGGS0_SHOW(N) \ 1280 ssize_t pggs##N##_show(struct device *device, \ 1281 struct device_attribute *attr, \ 1282 char *buf) \ 1283 { \ 1284 return pggs_show(device, attr, buf, N); \ 1285 } 1286 1287 #define PGGS0_STORE(N) \ 1288 ssize_t pggs##N##_store(struct device *device, \ 1289 struct device_attribute *attr, \ 1290 const char *buf, \ 1291 size_t count) \ 1292 { \ 1293 return pggs_store(device, attr, buf, count, N); \ 1294 } 1295 1296 /* PGGS register show functions */ 1297 static PGGS0_SHOW(0); 1298 static PGGS0_SHOW(1); 1299 static PGGS0_SHOW(2); 1300 static PGGS0_SHOW(3); 1301 1302 /* PGGS register store functions */ 1303 static PGGS0_STORE(0); 1304 static PGGS0_STORE(1); 1305 static PGGS0_STORE(2); 1306 static PGGS0_STORE(3); 1307 1308 /* GGS register attributes */ 1309 static DEVICE_ATTR_RW(ggs0); 1310 static DEVICE_ATTR_RW(ggs1); 1311 static DEVICE_ATTR_RW(ggs2); 1312 static DEVICE_ATTR_RW(ggs3); 1313 1314 /* PGGS register attributes */ 1315 static DEVICE_ATTR_RW(pggs0); 1316 static DEVICE_ATTR_RW(pggs1); 1317 static DEVICE_ATTR_RW(pggs2); 1318 static DEVICE_ATTR_RW(pggs3); 1319 1320 static struct attribute *zynqmp_firmware_attrs[] = { 1321 &dev_attr_ggs0.attr, 1322 &dev_attr_ggs1.attr, 1323 &dev_attr_ggs2.attr, 1324 &dev_attr_ggs3.attr, 1325 &dev_attr_pggs0.attr, 1326 &dev_attr_pggs1.attr, 1327 &dev_attr_pggs2.attr, 1328 &dev_attr_pggs3.attr, 1329 &dev_attr_shutdown_scope.attr, 1330 &dev_attr_health_status.attr, 1331 NULL, 1332 }; 1333 1334 ATTRIBUTE_GROUPS(zynqmp_firmware); 1335 1336 static int zynqmp_firmware_probe(struct platform_device *pdev) 1337 { 1338 struct device *dev = &pdev->dev; 1339 struct device_node *np; 1340 int ret; 1341 1342 np = of_find_compatible_node(NULL, NULL, "xlnx,zynqmp"); 1343 if (!np) { 1344 np = of_find_compatible_node(NULL, NULL, "xlnx,versal"); 1345 if (!np) 1346 return 0; 1347 1348 feature_check_enabled = true; 1349 } 1350 of_node_put(np); 1351 1352 ret = get_set_conduit_method(dev->of_node); 1353 if (ret) 1354 return ret; 1355 1356 /* Check PM API version number */ 1357 zynqmp_pm_get_api_version(&pm_api_version); 1358 if (pm_api_version < ZYNQMP_PM_VERSION) { 1359 panic("%s Platform Management API version error. Expected: v%d.%d - Found: v%d.%d\n", 1360 __func__, 1361 ZYNQMP_PM_VERSION_MAJOR, ZYNQMP_PM_VERSION_MINOR, 1362 pm_api_version >> 16, pm_api_version & 0xFFFF); 1363 } 1364 1365 pr_info("%s Platform Management API v%d.%d\n", __func__, 1366 pm_api_version >> 16, pm_api_version & 0xFFFF); 1367 1368 /* Check trustzone version number */ 1369 ret = zynqmp_pm_get_trustzone_version(&pm_tz_version); 1370 if (ret) 1371 panic("Legacy trustzone found without version support\n"); 1372 1373 if (pm_tz_version < ZYNQMP_TZ_VERSION) 1374 panic("%s Trustzone version error. Expected: v%d.%d - Found: v%d.%d\n", 1375 __func__, 1376 ZYNQMP_TZ_VERSION_MAJOR, ZYNQMP_TZ_VERSION_MINOR, 1377 pm_tz_version >> 16, pm_tz_version & 0xFFFF); 1378 1379 pr_info("%s Trustzone version v%d.%d\n", __func__, 1380 pm_tz_version >> 16, pm_tz_version & 0xFFFF); 1381 1382 ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, firmware_devs, 1383 ARRAY_SIZE(firmware_devs), NULL, 0, NULL); 1384 if (ret) { 1385 dev_err(&pdev->dev, "failed to add MFD devices %d\n", ret); 1386 return ret; 1387 } 1388 1389 zynqmp_pm_api_debugfs_init(); 1390 1391 return of_platform_populate(dev->of_node, NULL, NULL, dev); 1392 } 1393 1394 static int zynqmp_firmware_remove(struct platform_device *pdev) 1395 { 1396 struct pm_api_feature_data *feature_data; 1397 struct hlist_node *tmp; 1398 int i; 1399 1400 mfd_remove_devices(&pdev->dev); 1401 zynqmp_pm_api_debugfs_exit(); 1402 1403 hash_for_each_safe(pm_api_features_map, i, tmp, feature_data, hentry) { 1404 hash_del(&feature_data->hentry); 1405 kfree(feature_data); 1406 } 1407 1408 return 0; 1409 } 1410 1411 static const struct of_device_id zynqmp_firmware_of_match[] = { 1412 {.compatible = "xlnx,zynqmp-firmware"}, 1413 {.compatible = "xlnx,versal-firmware"}, 1414 {}, 1415 }; 1416 MODULE_DEVICE_TABLE(of, zynqmp_firmware_of_match); 1417 1418 static struct platform_driver zynqmp_firmware_driver = { 1419 .driver = { 1420 .name = "zynqmp_firmware", 1421 .of_match_table = zynqmp_firmware_of_match, 1422 .dev_groups = zynqmp_firmware_groups, 1423 }, 1424 .probe = zynqmp_firmware_probe, 1425 .remove = zynqmp_firmware_remove, 1426 }; 1427 module_platform_driver(zynqmp_firmware_driver); 1428