1 /* 2 * Copyright (c) 2010 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/types.h> 18 #include <net/cfg80211.h> 19 #include <net/mac80211.h> 20 #include <net/regulatory.h> 21 22 #include <defs.h> 23 #include "pub.h" 24 #include "phy/phy_hal.h" 25 #include "main.h" 26 #include "stf.h" 27 #include "channel.h" 28 #include "mac80211_if.h" 29 #include "debug.h" 30 31 /* QDB() macro takes a dB value and converts to a quarter dB value */ 32 #define QDB(n) ((n) * BRCMS_TXPWR_DB_FACTOR) 33 34 #define LOCALE_MIMO_IDX_bn 0 35 #define LOCALE_MIMO_IDX_11n 0 36 37 /* max of BAND_5G_PWR_LVLS and 14 for 2.4 GHz */ 38 #define BRCMS_MAXPWR_MIMO_TBL_SIZE 14 39 40 /* maxpwr mapping to 5GHz band channels: 41 * maxpwr[0] - channels [34-48] 42 * maxpwr[1] - channels [52-60] 43 * maxpwr[2] - channels [62-64] 44 * maxpwr[3] - channels [100-140] 45 * maxpwr[4] - channels [149-165] 46 */ 47 #define BAND_5G_PWR_LVLS 5 /* 5 power levels for 5G */ 48 49 #define LC(id) LOCALE_MIMO_IDX_ ## id 50 51 #define LOCALES(mimo2, mimo5) \ 52 {LC(mimo2), LC(mimo5)} 53 54 /* macro to get 5 GHz channel group index for tx power */ 55 #define CHANNEL_POWER_IDX_5G(c) (((c) < 52) ? 0 : \ 56 (((c) < 62) ? 1 : \ 57 (((c) < 100) ? 2 : \ 58 (((c) < 149) ? 3 : 4)))) 59 60 #define BRCM_2GHZ_2412_2462 REG_RULE(2412-10, 2462+10, 40, 0, 19, 0) 61 #define BRCM_2GHZ_2467_2472 REG_RULE(2467-10, 2472+10, 20, 0, 19, \ 62 NL80211_RRF_NO_IR) 63 64 #define BRCM_5GHZ_5180_5240 REG_RULE(5180-10, 5240+10, 40, 0, 21, \ 65 NL80211_RRF_NO_IR) 66 #define BRCM_5GHZ_5260_5320 REG_RULE(5260-10, 5320+10, 40, 0, 21, \ 67 NL80211_RRF_DFS | \ 68 NL80211_RRF_NO_IR) 69 #define BRCM_5GHZ_5500_5700 REG_RULE(5500-10, 5700+10, 40, 0, 21, \ 70 NL80211_RRF_DFS | \ 71 NL80211_RRF_NO_IR) 72 #define BRCM_5GHZ_5745_5825 REG_RULE(5745-10, 5825+10, 40, 0, 21, \ 73 NL80211_RRF_NO_IR) 74 75 static const struct ieee80211_regdomain brcms_regdom_x2 = { 76 .n_reg_rules = 6, 77 .alpha2 = "X2", 78 .reg_rules = { 79 BRCM_2GHZ_2412_2462, 80 BRCM_2GHZ_2467_2472, 81 BRCM_5GHZ_5180_5240, 82 BRCM_5GHZ_5260_5320, 83 BRCM_5GHZ_5500_5700, 84 BRCM_5GHZ_5745_5825, 85 } 86 }; 87 88 /* locale per-channel tx power limits for MIMO frames 89 * maxpwr arrays are index by channel for 2.4 GHz limits, and 90 * by sub-band for 5 GHz limits using CHANNEL_POWER_IDX_5G(channel) 91 */ 92 struct locale_mimo_info { 93 /* tx 20 MHz power limits, qdBm units */ 94 s8 maxpwr20[BRCMS_MAXPWR_MIMO_TBL_SIZE]; 95 /* tx 40 MHz power limits, qdBm units */ 96 s8 maxpwr40[BRCMS_MAXPWR_MIMO_TBL_SIZE]; 97 }; 98 99 /* Country names and abbreviations with locale defined from ISO 3166 */ 100 struct country_info { 101 const u8 locale_mimo_2G; /* 2.4G mimo info */ 102 const u8 locale_mimo_5G; /* 5G mimo info */ 103 }; 104 105 struct brcms_regd { 106 struct country_info country; 107 const struct ieee80211_regdomain *regdomain; 108 }; 109 110 struct brcms_cm_info { 111 struct brcms_pub *pub; 112 struct brcms_c_info *wlc; 113 const struct brcms_regd *world_regd; 114 }; 115 116 /* 117 * MIMO Locale Definitions - 2.4 GHz 118 */ 119 static const struct locale_mimo_info locale_bn = { 120 {QDB(13), QDB(13), QDB(13), QDB(13), QDB(13), 121 QDB(13), QDB(13), QDB(13), QDB(13), QDB(13), 122 QDB(13), QDB(13), QDB(13)}, 123 {0, 0, QDB(13), QDB(13), QDB(13), 124 QDB(13), QDB(13), QDB(13), QDB(13), QDB(13), 125 QDB(13), 0, 0}, 126 }; 127 128 static const struct locale_mimo_info *g_mimo_2g_table[] = { 129 &locale_bn 130 }; 131 132 /* 133 * MIMO Locale Definitions - 5 GHz 134 */ 135 static const struct locale_mimo_info locale_11n = { 136 { /* 12.5 dBm */ 50, 50, 50, QDB(15), QDB(15)}, 137 {QDB(14), QDB(15), QDB(15), QDB(15), QDB(15)}, 138 }; 139 140 static const struct locale_mimo_info *g_mimo_5g_table[] = { 141 &locale_11n 142 }; 143 144 static const struct brcms_regd cntry_locales[] = { 145 /* Worldwide RoW 2, must always be at index 0 */ 146 { 147 .country = LOCALES(bn, 11n), 148 .regdomain = &brcms_regdom_x2, 149 }, 150 }; 151 152 static const struct locale_mimo_info *brcms_c_get_mimo_2g(u8 locale_idx) 153 { 154 if (locale_idx >= ARRAY_SIZE(g_mimo_2g_table)) 155 return NULL; 156 157 return g_mimo_2g_table[locale_idx]; 158 } 159 160 static const struct locale_mimo_info *brcms_c_get_mimo_5g(u8 locale_idx) 161 { 162 if (locale_idx >= ARRAY_SIZE(g_mimo_5g_table)) 163 return NULL; 164 165 return g_mimo_5g_table[locale_idx]; 166 } 167 168 /* 169 * Indicates whether the country provided is valid to pass 170 * to cfg80211 or not. 171 * 172 * returns true if valid; false if not. 173 */ 174 static bool brcms_c_country_valid(const char *ccode) 175 { 176 /* 177 * only allow ascii alpha uppercase for the first 2 178 * chars. 179 */ 180 if (!((ccode[0] & 0x80) == 0 && ccode[0] >= 0x41 && ccode[0] <= 0x5A && 181 (ccode[1] & 0x80) == 0 && ccode[1] >= 0x41 && ccode[1] <= 0x5A)) 182 return false; 183 184 /* 185 * do not match ISO 3166-1 user assigned country codes 186 * that may be in the driver table 187 */ 188 if (!strcmp("AA", ccode) || /* AA */ 189 !strcmp("ZZ", ccode) || /* ZZ */ 190 ccode[0] == 'X' || /* XA - XZ */ 191 (ccode[0] == 'Q' && /* QM - QZ */ 192 (ccode[1] >= 'M' && ccode[1] <= 'Z'))) 193 return false; 194 195 if (!strcmp("NA", ccode)) 196 return false; 197 198 return true; 199 } 200 201 static const struct brcms_regd *brcms_world_regd(const char *regdom, int len) 202 { 203 const struct brcms_regd *regd = NULL; 204 int i; 205 206 for (i = 0; i < ARRAY_SIZE(cntry_locales); i++) { 207 if (!strncmp(regdom, cntry_locales[i].regdomain->alpha2, len)) { 208 regd = &cntry_locales[i]; 209 break; 210 } 211 } 212 213 return regd; 214 } 215 216 static const struct brcms_regd *brcms_default_world_regd(void) 217 { 218 return &cntry_locales[0]; 219 } 220 221 /* JP, J1 - J10 are Japan ccodes */ 222 static bool brcms_c_japan_ccode(const char *ccode) 223 { 224 return (ccode[0] == 'J' && 225 (ccode[1] == 'P' || (ccode[1] >= '1' && ccode[1] <= '9'))); 226 } 227 228 static void 229 brcms_c_channel_min_txpower_limits_with_local_constraint( 230 struct brcms_cm_info *wlc_cm, struct txpwr_limits *txpwr, 231 u8 local_constraint_qdbm) 232 { 233 int j; 234 235 /* CCK Rates */ 236 for (j = 0; j < WL_TX_POWER_CCK_NUM; j++) 237 txpwr->cck[j] = min(txpwr->cck[j], local_constraint_qdbm); 238 239 /* 20 MHz Legacy OFDM SISO */ 240 for (j = 0; j < WL_TX_POWER_OFDM_NUM; j++) 241 txpwr->ofdm[j] = min(txpwr->ofdm[j], local_constraint_qdbm); 242 243 /* 20 MHz Legacy OFDM CDD */ 244 for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++) 245 txpwr->ofdm_cdd[j] = 246 min(txpwr->ofdm_cdd[j], local_constraint_qdbm); 247 248 /* 40 MHz Legacy OFDM SISO */ 249 for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++) 250 txpwr->ofdm_40_siso[j] = 251 min(txpwr->ofdm_40_siso[j], local_constraint_qdbm); 252 253 /* 40 MHz Legacy OFDM CDD */ 254 for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++) 255 txpwr->ofdm_40_cdd[j] = 256 min(txpwr->ofdm_40_cdd[j], local_constraint_qdbm); 257 258 /* 20MHz MCS 0-7 SISO */ 259 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++) 260 txpwr->mcs_20_siso[j] = 261 min(txpwr->mcs_20_siso[j], local_constraint_qdbm); 262 263 /* 20MHz MCS 0-7 CDD */ 264 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++) 265 txpwr->mcs_20_cdd[j] = 266 min(txpwr->mcs_20_cdd[j], local_constraint_qdbm); 267 268 /* 20MHz MCS 0-7 STBC */ 269 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++) 270 txpwr->mcs_20_stbc[j] = 271 min(txpwr->mcs_20_stbc[j], local_constraint_qdbm); 272 273 /* 20MHz MCS 8-15 MIMO */ 274 for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++) 275 txpwr->mcs_20_mimo[j] = 276 min(txpwr->mcs_20_mimo[j], local_constraint_qdbm); 277 278 /* 40MHz MCS 0-7 SISO */ 279 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++) 280 txpwr->mcs_40_siso[j] = 281 min(txpwr->mcs_40_siso[j], local_constraint_qdbm); 282 283 /* 40MHz MCS 0-7 CDD */ 284 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++) 285 txpwr->mcs_40_cdd[j] = 286 min(txpwr->mcs_40_cdd[j], local_constraint_qdbm); 287 288 /* 40MHz MCS 0-7 STBC */ 289 for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++) 290 txpwr->mcs_40_stbc[j] = 291 min(txpwr->mcs_40_stbc[j], local_constraint_qdbm); 292 293 /* 40MHz MCS 8-15 MIMO */ 294 for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++) 295 txpwr->mcs_40_mimo[j] = 296 min(txpwr->mcs_40_mimo[j], local_constraint_qdbm); 297 298 /* 40MHz MCS 32 */ 299 txpwr->mcs32 = min(txpwr->mcs32, local_constraint_qdbm); 300 301 } 302 303 /* 304 * set the driver's current country and regulatory information 305 * using a country code as the source. Look up built in country 306 * information found with the country code. 307 */ 308 static void 309 brcms_c_set_country(struct brcms_cm_info *wlc_cm, 310 const struct brcms_regd *regd) 311 { 312 struct brcms_c_info *wlc = wlc_cm->wlc; 313 314 if ((wlc->pub->_n_enab & SUPPORT_11N) != 315 wlc->protection->nmode_user) 316 brcms_c_set_nmode(wlc); 317 318 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); 319 brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); 320 321 brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false); 322 323 return; 324 } 325 326 struct brcms_cm_info *brcms_c_channel_mgr_attach(struct brcms_c_info *wlc) 327 { 328 struct brcms_cm_info *wlc_cm; 329 struct brcms_pub *pub = wlc->pub; 330 struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom; 331 const char *ccode = sprom->alpha2; 332 int ccode_len = sizeof(sprom->alpha2); 333 334 wlc_cm = kzalloc(sizeof(struct brcms_cm_info), GFP_ATOMIC); 335 if (wlc_cm == NULL) 336 return NULL; 337 wlc_cm->pub = pub; 338 wlc_cm->wlc = wlc; 339 wlc->cmi = wlc_cm; 340 341 /* store the country code for passing up as a regulatory hint */ 342 wlc_cm->world_regd = brcms_world_regd(ccode, ccode_len); 343 if (brcms_c_country_valid(ccode)) 344 strncpy(wlc->pub->srom_ccode, ccode, ccode_len); 345 346 /* 347 * If no custom world domain is found in the SROM, use the 348 * default "X2" domain. 349 */ 350 if (!wlc_cm->world_regd) { 351 wlc_cm->world_regd = brcms_default_world_regd(); 352 ccode = wlc_cm->world_regd->regdomain->alpha2; 353 ccode_len = BRCM_CNTRY_BUF_SZ - 1; 354 } 355 356 /* save default country for exiting 11d regulatory mode */ 357 strncpy(wlc->country_default, ccode, ccode_len); 358 359 /* initialize autocountry_default to driver default */ 360 strncpy(wlc->autocountry_default, ccode, ccode_len); 361 362 brcms_c_set_country(wlc_cm, wlc_cm->world_regd); 363 364 return wlc_cm; 365 } 366 367 void brcms_c_channel_mgr_detach(struct brcms_cm_info *wlc_cm) 368 { 369 kfree(wlc_cm); 370 } 371 372 void 373 brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec, 374 u8 local_constraint_qdbm) 375 { 376 struct brcms_c_info *wlc = wlc_cm->wlc; 377 struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.chandef.chan; 378 struct txpwr_limits txpwr; 379 380 brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr); 381 382 brcms_c_channel_min_txpower_limits_with_local_constraint( 383 wlc_cm, &txpwr, local_constraint_qdbm 384 ); 385 386 /* set or restore gmode as required by regulatory */ 387 if (ch->flags & IEEE80211_CHAN_NO_OFDM) 388 brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false); 389 else 390 brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false); 391 392 brcms_b_set_chanspec(wlc->hw, chanspec, 393 !!(ch->flags & IEEE80211_CHAN_NO_IR), 394 &txpwr); 395 } 396 397 void 398 brcms_c_channel_reg_limits(struct brcms_cm_info *wlc_cm, u16 chanspec, 399 struct txpwr_limits *txpwr) 400 { 401 struct brcms_c_info *wlc = wlc_cm->wlc; 402 struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.chandef.chan; 403 uint i; 404 uint chan; 405 int maxpwr; 406 int delta; 407 const struct country_info *country; 408 struct brcms_band *band; 409 int conducted_max = BRCMS_TXPWR_MAX; 410 const struct locale_mimo_info *li_mimo; 411 int maxpwr20, maxpwr40; 412 int maxpwr_idx; 413 uint j; 414 415 memset(txpwr, 0, sizeof(struct txpwr_limits)); 416 417 if (WARN_ON(!ch)) 418 return; 419 420 country = &wlc_cm->world_regd->country; 421 422 chan = CHSPEC_CHANNEL(chanspec); 423 band = wlc->bandstate[chspec_bandunit(chanspec)]; 424 li_mimo = (band->bandtype == BRCM_BAND_5G) ? 425 brcms_c_get_mimo_5g(country->locale_mimo_5G) : 426 brcms_c_get_mimo_2g(country->locale_mimo_2G); 427 428 delta = band->antgain; 429 430 if (band->bandtype == BRCM_BAND_2G) 431 conducted_max = QDB(22); 432 433 maxpwr = QDB(ch->max_power) - delta; 434 maxpwr = max(maxpwr, 0); 435 maxpwr = min(maxpwr, conducted_max); 436 437 /* CCK txpwr limits for 2.4G band */ 438 if (band->bandtype == BRCM_BAND_2G) { 439 for (i = 0; i < BRCMS_NUM_RATES_CCK; i++) 440 txpwr->cck[i] = (u8) maxpwr; 441 } 442 443 for (i = 0; i < BRCMS_NUM_RATES_OFDM; i++) { 444 txpwr->ofdm[i] = (u8) maxpwr; 445 446 /* 447 * OFDM 40 MHz SISO has the same power as the corresponding 448 * MCS0-7 rate unless overriden by the locale specific code. 449 * We set this value to 0 as a flag (presumably 0 dBm isn't 450 * a possibility) and then copy the MCS0-7 value to the 40 MHz 451 * value if it wasn't explicitly set. 452 */ 453 txpwr->ofdm_40_siso[i] = 0; 454 455 txpwr->ofdm_cdd[i] = (u8) maxpwr; 456 457 txpwr->ofdm_40_cdd[i] = 0; 458 } 459 460 delta = 0; 461 if (band->antgain > QDB(6)) 462 delta = band->antgain - QDB(6); /* Excess over 6 dB */ 463 464 if (band->bandtype == BRCM_BAND_2G) 465 maxpwr_idx = (chan - 1); 466 else 467 maxpwr_idx = CHANNEL_POWER_IDX_5G(chan); 468 469 maxpwr20 = li_mimo->maxpwr20[maxpwr_idx]; 470 maxpwr40 = li_mimo->maxpwr40[maxpwr_idx]; 471 472 maxpwr20 = maxpwr20 - delta; 473 maxpwr20 = max(maxpwr20, 0); 474 maxpwr40 = maxpwr40 - delta; 475 maxpwr40 = max(maxpwr40, 0); 476 477 /* Fill in the MCS 0-7 (SISO) rates */ 478 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) { 479 480 /* 481 * 20 MHz has the same power as the corresponding OFDM rate 482 * unless overriden by the locale specific code. 483 */ 484 txpwr->mcs_20_siso[i] = txpwr->ofdm[i]; 485 txpwr->mcs_40_siso[i] = 0; 486 } 487 488 /* Fill in the MCS 0-7 CDD rates */ 489 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) { 490 txpwr->mcs_20_cdd[i] = (u8) maxpwr20; 491 txpwr->mcs_40_cdd[i] = (u8) maxpwr40; 492 } 493 494 /* 495 * These locales have SISO expressed in the 496 * table and override CDD later 497 */ 498 if (li_mimo == &locale_bn) { 499 maxpwr20 = QDB(16); 500 maxpwr40 = 0; 501 502 if (chan >= 3 && chan <= 11) 503 maxpwr40 = QDB(16); 504 505 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) { 506 txpwr->mcs_20_siso[i] = (u8) maxpwr20; 507 txpwr->mcs_40_siso[i] = (u8) maxpwr40; 508 } 509 } 510 511 /* Fill in the MCS 0-7 STBC rates */ 512 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) { 513 txpwr->mcs_20_stbc[i] = 0; 514 txpwr->mcs_40_stbc[i] = 0; 515 } 516 517 /* Fill in the MCS 8-15 SDM rates */ 518 for (i = 0; i < BRCMS_NUM_RATES_MCS_2_STREAM; i++) { 519 txpwr->mcs_20_mimo[i] = (u8) maxpwr20; 520 txpwr->mcs_40_mimo[i] = (u8) maxpwr40; 521 } 522 523 /* Fill in MCS32 */ 524 txpwr->mcs32 = (u8) maxpwr40; 525 526 for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) { 527 if (txpwr->ofdm_40_cdd[i] == 0) 528 txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j]; 529 if (i == 0) { 530 i = i + 1; 531 if (txpwr->ofdm_40_cdd[i] == 0) 532 txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j]; 533 } 534 } 535 536 /* 537 * Copy the 40 MHZ MCS 0-7 CDD value to the 40 MHZ MCS 0-7 SISO 538 * value if it wasn't provided explicitly. 539 */ 540 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) { 541 if (txpwr->mcs_40_siso[i] == 0) 542 txpwr->mcs_40_siso[i] = txpwr->mcs_40_cdd[i]; 543 } 544 545 for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) { 546 if (txpwr->ofdm_40_siso[i] == 0) 547 txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j]; 548 if (i == 0) { 549 i = i + 1; 550 if (txpwr->ofdm_40_siso[i] == 0) 551 txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j]; 552 } 553 } 554 555 /* 556 * Copy the 20 and 40 MHz MCS0-7 CDD values to the corresponding 557 * STBC values if they weren't provided explicitly. 558 */ 559 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) { 560 if (txpwr->mcs_20_stbc[i] == 0) 561 txpwr->mcs_20_stbc[i] = txpwr->mcs_20_cdd[i]; 562 563 if (txpwr->mcs_40_stbc[i] == 0) 564 txpwr->mcs_40_stbc[i] = txpwr->mcs_40_cdd[i]; 565 } 566 567 return; 568 } 569 570 /* 571 * Verify the chanspec is using a legal set of parameters, i.e. that the 572 * chanspec specified a band, bw, ctl_sb and channel and that the 573 * combination could be legal given any set of circumstances. 574 * RETURNS: true is the chanspec is malformed, false if it looks good. 575 */ 576 static bool brcms_c_chspec_malformed(u16 chanspec) 577 { 578 /* must be 2G or 5G band */ 579 if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec)) 580 return true; 581 /* must be 20 or 40 bandwidth */ 582 if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec)) 583 return true; 584 585 /* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */ 586 if (CHSPEC_IS20(chanspec)) { 587 if (!CHSPEC_SB_NONE(chanspec)) 588 return true; 589 } else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) { 590 return true; 591 } 592 593 return false; 594 } 595 596 /* 597 * Validate the chanspec for this locale, for 40MHZ we need to also 598 * check that the sidebands are valid 20MZH channels in this locale 599 * and they are also a legal HT combination 600 */ 601 static bool 602 brcms_c_valid_chanspec_ext(struct brcms_cm_info *wlc_cm, u16 chspec) 603 { 604 struct brcms_c_info *wlc = wlc_cm->wlc; 605 u8 channel = CHSPEC_CHANNEL(chspec); 606 607 /* check the chanspec */ 608 if (brcms_c_chspec_malformed(chspec)) { 609 brcms_err(wlc->hw->d11core, "wl%d: malformed chanspec 0x%x\n", 610 wlc->pub->unit, chspec); 611 return false; 612 } 613 614 if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) != 615 chspec_bandunit(chspec)) 616 return false; 617 618 return true; 619 } 620 621 bool brcms_c_valid_chanspec_db(struct brcms_cm_info *wlc_cm, u16 chspec) 622 { 623 return brcms_c_valid_chanspec_ext(wlc_cm, chspec); 624 } 625 626 static bool brcms_is_radar_freq(u16 center_freq) 627 { 628 return center_freq >= 5260 && center_freq <= 5700; 629 } 630 631 static void brcms_reg_apply_radar_flags(struct wiphy *wiphy) 632 { 633 struct ieee80211_supported_band *sband; 634 struct ieee80211_channel *ch; 635 int i; 636 637 sband = wiphy->bands[NL80211_BAND_5GHZ]; 638 if (!sband) 639 return; 640 641 for (i = 0; i < sband->n_channels; i++) { 642 ch = &sband->channels[i]; 643 644 if (!brcms_is_radar_freq(ch->center_freq)) 645 continue; 646 647 /* 648 * All channels in this range should be passive and have 649 * DFS enabled. 650 */ 651 if (!(ch->flags & IEEE80211_CHAN_DISABLED)) 652 ch->flags |= IEEE80211_CHAN_RADAR | 653 IEEE80211_CHAN_NO_IR; 654 } 655 } 656 657 static void 658 brcms_reg_apply_beaconing_flags(struct wiphy *wiphy, 659 enum nl80211_reg_initiator initiator) 660 { 661 struct ieee80211_supported_band *sband; 662 struct ieee80211_channel *ch; 663 const struct ieee80211_reg_rule *rule; 664 int band, i; 665 666 for (band = 0; band < NUM_NL80211_BANDS; band++) { 667 sband = wiphy->bands[band]; 668 if (!sband) 669 continue; 670 671 for (i = 0; i < sband->n_channels; i++) { 672 ch = &sband->channels[i]; 673 674 if (ch->flags & 675 (IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_RADAR)) 676 continue; 677 678 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { 679 rule = freq_reg_info(wiphy, 680 MHZ_TO_KHZ(ch->center_freq)); 681 if (IS_ERR(rule)) 682 continue; 683 684 if (!(rule->flags & NL80211_RRF_NO_IR)) 685 ch->flags &= ~IEEE80211_CHAN_NO_IR; 686 } else if (ch->beacon_found) { 687 ch->flags &= ~IEEE80211_CHAN_NO_IR; 688 } 689 } 690 } 691 } 692 693 static void brcms_reg_notifier(struct wiphy *wiphy, 694 struct regulatory_request *request) 695 { 696 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); 697 struct brcms_info *wl = hw->priv; 698 struct brcms_c_info *wlc = wl->wlc; 699 struct ieee80211_supported_band *sband; 700 struct ieee80211_channel *ch; 701 int band, i; 702 bool ch_found = false; 703 704 brcms_reg_apply_radar_flags(wiphy); 705 706 if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 707 brcms_reg_apply_beaconing_flags(wiphy, request->initiator); 708 709 /* Disable radio if all channels disallowed by regulatory */ 710 for (band = 0; !ch_found && band < NUM_NL80211_BANDS; band++) { 711 sband = wiphy->bands[band]; 712 if (!sband) 713 continue; 714 715 for (i = 0; !ch_found && i < sband->n_channels; i++) { 716 ch = &sband->channels[i]; 717 718 if (!(ch->flags & IEEE80211_CHAN_DISABLED)) 719 ch_found = true; 720 } 721 } 722 723 if (ch_found) { 724 mboolclr(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE); 725 } else { 726 mboolset(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE); 727 brcms_err(wlc->hw->d11core, 728 "wl%d: %s: no valid channel for \"%s\"\n", 729 wlc->pub->unit, __func__, request->alpha2); 730 } 731 732 if (wlc->pub->_nbands > 1 || wlc->band->bandtype == BRCM_BAND_2G) 733 wlc_phy_chanspec_ch14_widefilter_set(wlc->band->pi, 734 brcms_c_japan_ccode(request->alpha2)); 735 } 736 737 void brcms_c_regd_init(struct brcms_c_info *wlc) 738 { 739 struct wiphy *wiphy = wlc->wiphy; 740 const struct brcms_regd *regd = wlc->cmi->world_regd; 741 struct ieee80211_supported_band *sband; 742 struct ieee80211_channel *ch; 743 struct brcms_chanvec sup_chan; 744 struct brcms_band *band; 745 int band_idx, i; 746 747 /* Disable any channels not supported by the phy */ 748 for (band_idx = 0; band_idx < wlc->pub->_nbands; band_idx++) { 749 band = wlc->bandstate[band_idx]; 750 751 wlc_phy_chanspec_band_validch(band->pi, band->bandtype, 752 &sup_chan); 753 754 if (band_idx == BAND_2G_INDEX) 755 sband = wiphy->bands[NL80211_BAND_2GHZ]; 756 else 757 sband = wiphy->bands[NL80211_BAND_5GHZ]; 758 759 for (i = 0; i < sband->n_channels; i++) { 760 ch = &sband->channels[i]; 761 if (!isset(sup_chan.vec, ch->hw_value)) 762 ch->flags |= IEEE80211_CHAN_DISABLED; 763 } 764 } 765 766 wlc->wiphy->reg_notifier = brcms_reg_notifier; 767 wlc->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 768 REGULATORY_STRICT_REG; 769 wiphy_apply_custom_regulatory(wlc->wiphy, regd->regdomain); 770 brcms_reg_apply_beaconing_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER); 771 } 772