1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2017 Intel Deutschland GmbH 9 * Copyright (C) 2019 - 2020 Intel Corporation 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * The full GNU General Public License is included in this distribution 21 * in the file called COPYING. 22 * 23 * Contact Information: 24 * Intel Linux Wireless <linuxwifi@intel.com> 25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 * 27 * BSD LICENSE 28 * 29 * Copyright(c) 2017 Intel Deutschland GmbH 30 * Copyright (C) 2019 - 2020 Intel Corporation 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 37 * * Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * * Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in 41 * the documentation and/or other materials provided with the 42 * distribution. 43 * * Neither the name Intel Corporation nor the names of its 44 * contributors may be used to endorse or promote products derived 45 * from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 58 * 59 *****************************************************************************/ 60 61 #include "iwl-drv.h" 62 #include "iwl-debug.h" 63 #include "acpi.h" 64 #include "fw/runtime.h" 65 66 void *iwl_acpi_get_object(struct device *dev, acpi_string method) 67 { 68 acpi_handle root_handle; 69 acpi_handle handle; 70 struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL}; 71 acpi_status status; 72 73 root_handle = ACPI_HANDLE(dev); 74 if (!root_handle) { 75 IWL_DEBUG_DEV_RADIO(dev, 76 "Could not retrieve root port ACPI handle\n"); 77 return ERR_PTR(-ENOENT); 78 } 79 80 /* Get the method's handle */ 81 status = acpi_get_handle(root_handle, method, &handle); 82 if (ACPI_FAILURE(status)) { 83 IWL_DEBUG_DEV_RADIO(dev, "%s method not found\n", method); 84 return ERR_PTR(-ENOENT); 85 } 86 87 /* Call the method with no arguments */ 88 status = acpi_evaluate_object(handle, NULL, NULL, &buf); 89 if (ACPI_FAILURE(status)) { 90 IWL_DEBUG_DEV_RADIO(dev, "%s invocation failed (0x%x)\n", 91 method, status); 92 return ERR_PTR(-ENOENT); 93 } 94 95 return buf.pointer; 96 } 97 IWL_EXPORT_SYMBOL(iwl_acpi_get_object); 98 99 union acpi_object *iwl_acpi_get_wifi_pkg(struct device *dev, 100 union acpi_object *data, 101 int data_size, int *tbl_rev) 102 { 103 int i; 104 union acpi_object *wifi_pkg; 105 106 /* 107 * We need at least one entry in the wifi package that 108 * describes the domain, and one more entry, otherwise there's 109 * no point in reading it. 110 */ 111 if (WARN_ON_ONCE(data_size < 2)) 112 return ERR_PTR(-EINVAL); 113 114 /* 115 * We need at least two packages, one for the revision and one 116 * for the data itself. Also check that the revision is valid 117 * (i.e. it is an integer smaller than 2, as we currently support only 118 * 2 revisions). 119 */ 120 if (data->type != ACPI_TYPE_PACKAGE || 121 data->package.count < 2 || 122 data->package.elements[0].type != ACPI_TYPE_INTEGER || 123 data->package.elements[0].integer.value > 1) { 124 IWL_DEBUG_DEV_RADIO(dev, "Unsupported packages structure\n"); 125 return ERR_PTR(-EINVAL); 126 } 127 128 *tbl_rev = data->package.elements[0].integer.value; 129 130 /* loop through all the packages to find the one for WiFi */ 131 for (i = 1; i < data->package.count; i++) { 132 union acpi_object *domain; 133 134 wifi_pkg = &data->package.elements[i]; 135 136 /* skip entries that are not a package with the right size */ 137 if (wifi_pkg->type != ACPI_TYPE_PACKAGE || 138 wifi_pkg->package.count != data_size) 139 continue; 140 141 domain = &wifi_pkg->package.elements[0]; 142 if (domain->type == ACPI_TYPE_INTEGER && 143 domain->integer.value == ACPI_WIFI_DOMAIN) 144 goto found; 145 } 146 147 return ERR_PTR(-ENOENT); 148 149 found: 150 return wifi_pkg; 151 } 152 IWL_EXPORT_SYMBOL(iwl_acpi_get_wifi_pkg); 153 154 int iwl_acpi_get_mcc(struct device *dev, char *mcc) 155 { 156 union acpi_object *wifi_pkg, *data; 157 u32 mcc_val; 158 int ret, tbl_rev; 159 160 data = iwl_acpi_get_object(dev, ACPI_WRDD_METHOD); 161 if (IS_ERR(data)) 162 return PTR_ERR(data); 163 164 wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_WRDD_WIFI_DATA_SIZE, 165 &tbl_rev); 166 if (IS_ERR(wifi_pkg)) { 167 ret = PTR_ERR(wifi_pkg); 168 goto out_free; 169 } 170 171 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER || 172 tbl_rev != 0) { 173 ret = -EINVAL; 174 goto out_free; 175 } 176 177 mcc_val = wifi_pkg->package.elements[1].integer.value; 178 179 mcc[0] = (mcc_val >> 8) & 0xff; 180 mcc[1] = mcc_val & 0xff; 181 mcc[2] = '\0'; 182 183 ret = 0; 184 out_free: 185 kfree(data); 186 return ret; 187 } 188 IWL_EXPORT_SYMBOL(iwl_acpi_get_mcc); 189 190 u64 iwl_acpi_get_pwr_limit(struct device *dev) 191 { 192 union acpi_object *data, *wifi_pkg; 193 u64 dflt_pwr_limit; 194 int tbl_rev; 195 196 data = iwl_acpi_get_object(dev, ACPI_SPLC_METHOD); 197 if (IS_ERR(data)) { 198 dflt_pwr_limit = 0; 199 goto out; 200 } 201 202 wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, 203 ACPI_SPLC_WIFI_DATA_SIZE, &tbl_rev); 204 if (IS_ERR(wifi_pkg) || tbl_rev != 0 || 205 wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER) { 206 dflt_pwr_limit = 0; 207 goto out_free; 208 } 209 210 dflt_pwr_limit = wifi_pkg->package.elements[1].integer.value; 211 out_free: 212 kfree(data); 213 out: 214 return dflt_pwr_limit; 215 } 216 IWL_EXPORT_SYMBOL(iwl_acpi_get_pwr_limit); 217 218 int iwl_acpi_get_eckv(struct device *dev, u32 *extl_clk) 219 { 220 union acpi_object *wifi_pkg, *data; 221 int ret, tbl_rev; 222 223 data = iwl_acpi_get_object(dev, ACPI_ECKV_METHOD); 224 if (IS_ERR(data)) 225 return PTR_ERR(data); 226 227 wifi_pkg = iwl_acpi_get_wifi_pkg(dev, data, ACPI_ECKV_WIFI_DATA_SIZE, 228 &tbl_rev); 229 if (IS_ERR(wifi_pkg)) { 230 ret = PTR_ERR(wifi_pkg); 231 goto out_free; 232 } 233 234 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER || 235 tbl_rev != 0) { 236 ret = -EINVAL; 237 goto out_free; 238 } 239 240 *extl_clk = wifi_pkg->package.elements[1].integer.value; 241 242 ret = 0; 243 244 out_free: 245 kfree(data); 246 return ret; 247 } 248 IWL_EXPORT_SYMBOL(iwl_acpi_get_eckv); 249 250 int iwl_sar_set_profile(union acpi_object *table, 251 struct iwl_sar_profile *profile, 252 bool enabled) 253 { 254 int i; 255 256 profile->enabled = enabled; 257 258 for (i = 0; i < ACPI_SAR_TABLE_SIZE; i++) { 259 if (table[i].type != ACPI_TYPE_INTEGER || 260 table[i].integer.value > U8_MAX) 261 return -EINVAL; 262 263 profile->table[i] = table[i].integer.value; 264 } 265 266 return 0; 267 } 268 IWL_EXPORT_SYMBOL(iwl_sar_set_profile); 269 270 int iwl_sar_select_profile(struct iwl_fw_runtime *fwrt, 271 __le16 per_chain_restriction[][IWL_NUM_SUB_BANDS], 272 int prof_a, int prof_b) 273 { 274 int i, j, idx; 275 int profs[ACPI_SAR_NUM_CHAIN_LIMITS] = { prof_a, prof_b }; 276 277 BUILD_BUG_ON(ACPI_SAR_NUM_CHAIN_LIMITS < 2); 278 BUILD_BUG_ON(ACPI_SAR_NUM_CHAIN_LIMITS * ACPI_SAR_NUM_SUB_BANDS != 279 ACPI_SAR_TABLE_SIZE); 280 281 for (i = 0; i < ACPI_SAR_NUM_CHAIN_LIMITS; i++) { 282 struct iwl_sar_profile *prof; 283 284 /* don't allow SAR to be disabled (profile 0 means disable) */ 285 if (profs[i] == 0) 286 return -EPERM; 287 288 /* we are off by one, so allow up to ACPI_SAR_PROFILE_NUM */ 289 if (profs[i] > ACPI_SAR_PROFILE_NUM) 290 return -EINVAL; 291 292 /* profiles go from 1 to 4, so decrement to access the array */ 293 prof = &fwrt->sar_profiles[profs[i] - 1]; 294 295 /* if the profile is disabled, do nothing */ 296 if (!prof->enabled) { 297 IWL_DEBUG_RADIO(fwrt, "SAR profile %d is disabled.\n", 298 profs[i]); 299 /* 300 * if one of the profiles is disabled, we 301 * ignore all of them and return 1 to 302 * differentiate disabled from other failures. 303 */ 304 return 1; 305 } 306 307 IWL_DEBUG_INFO(fwrt, 308 "SAR EWRD: chain %d profile index %d\n", 309 i, profs[i]); 310 IWL_DEBUG_RADIO(fwrt, " Chain[%d]:\n", i); 311 for (j = 0; j < ACPI_SAR_NUM_SUB_BANDS; j++) { 312 idx = (i * ACPI_SAR_NUM_SUB_BANDS) + j; 313 per_chain_restriction[i][j] = 314 cpu_to_le16(prof->table[idx]); 315 IWL_DEBUG_RADIO(fwrt, " Band[%d] = %d * .125dBm\n", 316 j, prof->table[idx]); 317 } 318 } 319 320 return 0; 321 } 322 IWL_EXPORT_SYMBOL(iwl_sar_select_profile); 323 324 int iwl_sar_get_wrds_table(struct iwl_fw_runtime *fwrt) 325 { 326 union acpi_object *wifi_pkg, *table, *data; 327 bool enabled; 328 int ret, tbl_rev; 329 330 data = iwl_acpi_get_object(fwrt->dev, ACPI_WRDS_METHOD); 331 if (IS_ERR(data)) 332 return PTR_ERR(data); 333 334 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 335 ACPI_WRDS_WIFI_DATA_SIZE, &tbl_rev); 336 if (IS_ERR(wifi_pkg) || tbl_rev != 0) { 337 ret = PTR_ERR(wifi_pkg); 338 goto out_free; 339 } 340 341 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) { 342 ret = -EINVAL; 343 goto out_free; 344 } 345 346 enabled = !!(wifi_pkg->package.elements[1].integer.value); 347 348 /* position of the actual table */ 349 table = &wifi_pkg->package.elements[2]; 350 351 /* The profile from WRDS is officially profile 1, but goes 352 * into sar_profiles[0] (because we don't have a profile 0). 353 */ 354 ret = iwl_sar_set_profile(table, &fwrt->sar_profiles[0], enabled); 355 out_free: 356 kfree(data); 357 return ret; 358 } 359 IWL_EXPORT_SYMBOL(iwl_sar_get_wrds_table); 360 361 int iwl_sar_get_ewrd_table(struct iwl_fw_runtime *fwrt) 362 { 363 union acpi_object *wifi_pkg, *data; 364 bool enabled; 365 int i, n_profiles, tbl_rev, pos; 366 int ret = 0; 367 368 data = iwl_acpi_get_object(fwrt->dev, ACPI_EWRD_METHOD); 369 if (IS_ERR(data)) 370 return PTR_ERR(data); 371 372 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 373 ACPI_EWRD_WIFI_DATA_SIZE, &tbl_rev); 374 if (IS_ERR(wifi_pkg) || tbl_rev != 0) { 375 ret = PTR_ERR(wifi_pkg); 376 goto out_free; 377 } 378 379 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER || 380 wifi_pkg->package.elements[2].type != ACPI_TYPE_INTEGER) { 381 ret = -EINVAL; 382 goto out_free; 383 } 384 385 enabled = !!(wifi_pkg->package.elements[1].integer.value); 386 n_profiles = wifi_pkg->package.elements[2].integer.value; 387 388 /* 389 * Check the validity of n_profiles. The EWRD profiles start 390 * from index 1, so the maximum value allowed here is 391 * ACPI_SAR_PROFILES_NUM - 1. 392 */ 393 if (n_profiles <= 0 || n_profiles >= ACPI_SAR_PROFILE_NUM) { 394 ret = -EINVAL; 395 goto out_free; 396 } 397 398 /* the tables start at element 3 */ 399 pos = 3; 400 401 for (i = 0; i < n_profiles; i++) { 402 /* The EWRD profiles officially go from 2 to 4, but we 403 * save them in sar_profiles[1-3] (because we don't 404 * have profile 0). So in the array we start from 1. 405 */ 406 ret = iwl_sar_set_profile(&wifi_pkg->package.elements[pos], 407 &fwrt->sar_profiles[i + 1], 408 enabled); 409 if (ret < 0) 410 break; 411 412 /* go to the next table */ 413 pos += ACPI_SAR_TABLE_SIZE; 414 } 415 416 out_free: 417 kfree(data); 418 return ret; 419 } 420 IWL_EXPORT_SYMBOL(iwl_sar_get_ewrd_table); 421 422 int iwl_sar_get_wgds_table(struct iwl_fw_runtime *fwrt) 423 { 424 union acpi_object *wifi_pkg, *data; 425 int i, j, ret, tbl_rev; 426 int idx = 1; 427 428 data = iwl_acpi_get_object(fwrt->dev, ACPI_WGDS_METHOD); 429 if (IS_ERR(data)) 430 return PTR_ERR(data); 431 432 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 433 ACPI_WGDS_WIFI_DATA_SIZE, &tbl_rev); 434 if (IS_ERR(wifi_pkg) || tbl_rev > 1) { 435 ret = PTR_ERR(wifi_pkg); 436 goto out_free; 437 } 438 439 fwrt->geo_rev = tbl_rev; 440 for (i = 0; i < ACPI_NUM_GEO_PROFILES; i++) { 441 for (j = 0; j < ACPI_GEO_TABLE_SIZE; j++) { 442 union acpi_object *entry; 443 444 entry = &wifi_pkg->package.elements[idx++]; 445 if (entry->type != ACPI_TYPE_INTEGER || 446 entry->integer.value > U8_MAX) { 447 ret = -EINVAL; 448 goto out_free; 449 } 450 451 fwrt->geo_profiles[i].values[j] = entry->integer.value; 452 } 453 } 454 ret = 0; 455 out_free: 456 kfree(data); 457 return ret; 458 } 459 IWL_EXPORT_SYMBOL(iwl_sar_get_wgds_table); 460 461 bool iwl_sar_geo_support(struct iwl_fw_runtime *fwrt) 462 { 463 /* 464 * The GEO_TX_POWER_LIMIT command is not supported on earlier 465 * firmware versions. Unfortunately, we don't have a TLV API 466 * flag to rely on, so rely on the major version which is in 467 * the first byte of ucode_ver. This was implemented 468 * initially on version 38 and then backported to 17. It was 469 * also backported to 29, but only for 7265D devices. The 470 * intention was to have it in 36 as well, but not all 8000 471 * family got this feature enabled. The 8000 family is the 472 * only one using version 36, so skip this version entirely. 473 */ 474 return IWL_UCODE_SERIAL(fwrt->fw->ucode_ver) >= 38 || 475 IWL_UCODE_SERIAL(fwrt->fw->ucode_ver) == 17 || 476 (IWL_UCODE_SERIAL(fwrt->fw->ucode_ver) == 29 && 477 ((fwrt->trans->hw_rev & CSR_HW_REV_TYPE_MSK) == 478 CSR_HW_REV_TYPE_7265D)); 479 } 480 IWL_EXPORT_SYMBOL(iwl_sar_geo_support); 481 482 int iwl_validate_sar_geo_profile(struct iwl_fw_runtime *fwrt, 483 struct iwl_host_cmd *cmd) 484 { 485 struct iwl_geo_tx_power_profiles_resp *resp; 486 int ret; 487 488 resp = (void *)cmd->resp_pkt->data; 489 ret = le32_to_cpu(resp->profile_idx); 490 if (WARN_ON(ret > ACPI_NUM_GEO_PROFILES)) { 491 ret = -EIO; 492 IWL_WARN(fwrt, "Invalid geographic profile idx (%d)\n", ret); 493 } 494 495 return ret; 496 } 497 IWL_EXPORT_SYMBOL(iwl_validate_sar_geo_profile); 498 499 int iwl_sar_geo_init(struct iwl_fw_runtime *fwrt, 500 struct iwl_per_chain_offset_group *table) 501 { 502 int ret, i, j; 503 504 if (!iwl_sar_geo_support(fwrt)) 505 return -EOPNOTSUPP; 506 507 ret = iwl_sar_get_wgds_table(fwrt); 508 if (ret < 0) { 509 IWL_DEBUG_RADIO(fwrt, 510 "Geo SAR BIOS table invalid or unavailable. (%d)\n", 511 ret); 512 /* we don't fail if the table is not available */ 513 return -ENOENT; 514 } 515 516 BUILD_BUG_ON(ACPI_NUM_GEO_PROFILES * ACPI_WGDS_NUM_BANDS * 517 ACPI_WGDS_TABLE_SIZE + 1 != ACPI_WGDS_WIFI_DATA_SIZE); 518 519 BUILD_BUG_ON(ACPI_NUM_GEO_PROFILES > IWL_NUM_GEO_PROFILES); 520 521 for (i = 0; i < ACPI_NUM_GEO_PROFILES; i++) { 522 struct iwl_per_chain_offset *chain = 523 (struct iwl_per_chain_offset *)&table[i]; 524 525 for (j = 0; j < ACPI_WGDS_NUM_BANDS; j++) { 526 u8 *value; 527 528 value = &fwrt->geo_profiles[i].values[j * 529 ACPI_GEO_PER_CHAIN_SIZE]; 530 chain[j].max_tx_power = cpu_to_le16(value[0]); 531 chain[j].chain_a = value[1]; 532 chain[j].chain_b = value[2]; 533 IWL_DEBUG_RADIO(fwrt, 534 "SAR geographic profile[%d] Band[%d]: chain A = %d chain B = %d max_tx_power = %d\n", 535 i, j, value[1], value[2], value[0]); 536 } 537 } 538 539 return 0; 540 } 541 IWL_EXPORT_SYMBOL(iwl_sar_geo_init); 542