drivers/net/wireless/brcm80211/brcmsmac/channel.c

   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_PASSIVE_SCAN | \
  63                                          NL80211_RRF_NO_IBSS)
  64
  65 #define BRCM_5GHZ_5180_5240     REG_RULE(5180-10, 5240+10, 40, 0, 21, \
  66                                          NL80211_RRF_PASSIVE_SCAN | \
  67                                          NL80211_RRF_NO_IBSS)
  68 #define BRCM_5GHZ_5260_5320     REG_RULE(5260-10, 5320+10, 40, 0, 21, \
  69                                          NL80211_RRF_PASSIVE_SCAN | \
  70                                          NL80211_RRF_DFS | \
  71                                          NL80211_RRF_NO_IBSS)
  72 #define BRCM_5GHZ_5500_5700     REG_RULE(5500-10, 5700+10, 40, 0, 21, \
  73                                          NL80211_RRF_PASSIVE_SCAN | \
  74                                          NL80211_RRF_DFS | \
  75                                          NL80211_RRF_NO_IBSS)
  76 #define BRCM_5GHZ_5745_5825     REG_RULE(5745-10, 5825+10, 40, 0, 21, \
  77                                          NL80211_RRF_PASSIVE_SCAN | \
  78                                          NL80211_RRF_NO_IBSS)
  79
  80 static const struct ieee80211_regdomain brcms_regdom_x2 = {
  81         .n_reg_rules = 6,
  82         .alpha2 = "X2",
  83         .reg_rules = {
  84                 BRCM_2GHZ_2412_2462,
  85                 BRCM_2GHZ_2467_2472,
  86                 BRCM_5GHZ_5180_5240,
  87                 BRCM_5GHZ_5260_5320,
  88                 BRCM_5GHZ_5500_5700,
  89                 BRCM_5GHZ_5745_5825,
  90         }
  91 };
  92
  93  /* locale per-channel tx power limits for MIMO frames
  94   * maxpwr arrays are index by channel for 2.4 GHz limits, and
  95   * by sub-band for 5 GHz limits using CHANNEL_POWER_IDX_5G(channel)
  96   */
  97 struct locale_mimo_info {
  98         /* tx 20 MHz power limits, qdBm units */
  99         s8 maxpwr20[BRCMS_MAXPWR_MIMO_TBL_SIZE];
 100         /* tx 40 MHz power limits, qdBm units */
 101         s8 maxpwr40[BRCMS_MAXPWR_MIMO_TBL_SIZE];
 102 };
 103
 104 /* Country names and abbreviations with locale defined from ISO 3166 */
 105 struct country_info {
 106         const u8 locale_mimo_2G;        /* 2.4G mimo info */
 107         const u8 locale_mimo_5G;        /* 5G mimo info */
 108 };
 109
 110 struct brcms_regd {
 111         struct country_info country;
 112         const struct ieee80211_regdomain *regdomain;
 113 };
 114
 115 struct brcms_cm_info {
 116         struct brcms_pub *pub;
 117         struct brcms_c_info *wlc;
 118         const struct brcms_regd *world_regd;
 119 };
 120
 121 /*
 122  * MIMO Locale Definitions - 2.4 GHz
 123  */
 124 static const struct locale_mimo_info locale_bn = {
 125         {QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 126          QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 127          QDB(13), QDB(13), QDB(13)},
 128         {0, 0, QDB(13), QDB(13), QDB(13),
 129          QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 130          QDB(13), 0, 0},
 131 };
 132
 133 static const struct locale_mimo_info *g_mimo_2g_table[] = {
 134         &locale_bn
 135 };
 136
 137 /*
 138  * MIMO Locale Definitions - 5 GHz
 139  */
 140 static const struct locale_mimo_info locale_11n = {
 141         { /* 12.5 dBm */ 50, 50, 50, QDB(15), QDB(15)},
 142         {QDB(14), QDB(15), QDB(15), QDB(15), QDB(15)},
 143 };
 144
 145 static const struct locale_mimo_info *g_mimo_5g_table[] = {
 146         &locale_11n
 147 };
 148
 149 static const struct brcms_regd cntry_locales[] = {
 150         /* Worldwide RoW 2, must always be at index 0 */
 151         {
 152                 .country = LOCALES(bn, 11n),
 153                 .regdomain = &brcms_regdom_x2,
 154         },
 155 };
 156
 157 static const struct locale_mimo_info *brcms_c_get_mimo_2g(u8 locale_idx)
 158 {
 159         if (locale_idx >= ARRAY_SIZE(g_mimo_2g_table))
 160                 return NULL;
 161
 162         return g_mimo_2g_table[locale_idx];
 163 }
 164
 165 static const struct locale_mimo_info *brcms_c_get_mimo_5g(u8 locale_idx)
 166 {
 167         if (locale_idx >= ARRAY_SIZE(g_mimo_5g_table))
 168                 return NULL;
 169
 170         return g_mimo_5g_table[locale_idx];
 171 }
 172
 173 /*
 174  * Indicates whether the country provided is valid to pass
 175  * to cfg80211 or not.
 176  *
 177  * returns true if valid; false if not.
 178  */
 179 static bool brcms_c_country_valid(const char *ccode)
 180 {
 181         /*
 182          * only allow ascii alpha uppercase for the first 2
 183          * chars.
 184          */
 185         if (!((0x80 & ccode[0]) == 0 && ccode[0] >= 0x41 && ccode[0] <= 0x5A &&
 186               (0x80 & ccode[1]) == 0 && ccode[1] >= 0x41 && ccode[1] <= 0x5A))
 187                 return false;
 188
 189         /*
 190          * do not match ISO 3166-1 user assigned country codes
 191          * that may be in the driver table
 192          */
 193         if (!strcmp("AA", ccode) ||        /* AA */
 194             !strcmp("ZZ", ccode) ||        /* ZZ */
 195             ccode[0] == 'X' ||             /* XA - XZ */
 196             (ccode[0] == 'Q' &&            /* QM - QZ */
 197              (ccode[1] >= 'M' && ccode[1] <= 'Z')))
 198                 return false;
 199
 200         if (!strcmp("NA", ccode))
 201                 return false;
 202
 203         return true;
 204 }
 205
 206 static const struct brcms_regd *brcms_world_regd(const char *regdom, int len)
 207 {
 208         const struct brcms_regd *regd = NULL;
 209         int i;
 210
 211         for (i = 0; i < ARRAY_SIZE(cntry_locales); i++) {
 212                 if (!strncmp(regdom, cntry_locales[i].regdomain->alpha2, len)) {
 213                         regd = &cntry_locales[i];
 214                         break;
 215                 }
 216         }
 217
 218         return regd;
 219 }
 220
 221 static const struct brcms_regd *brcms_default_world_regd(void)
 222 {
 223         return &cntry_locales[0];
 224 }
 225
 226 /* JP, J1 - J10 are Japan ccodes */
 227 static bool brcms_c_japan_ccode(const char *ccode)
 228 {
 229         return (ccode[0] == 'J' &&
 230                 (ccode[1] == 'P' || (ccode[1] >= '1' && ccode[1] <= '9')));
 231 }
 232
 233 static void
 234 brcms_c_channel_min_txpower_limits_with_local_constraint(
 235                 struct brcms_cm_info *wlc_cm, struct txpwr_limits *txpwr,
 236                 u8 local_constraint_qdbm)
 237 {
 238         int j;
 239
 240         /* CCK Rates */
 241         for (j = 0; j < WL_TX_POWER_CCK_NUM; j++)
 242                 txpwr->cck[j] = min(txpwr->cck[j], local_constraint_qdbm);
 243
 244         /* 20 MHz Legacy OFDM SISO */
 245         for (j = 0; j < WL_TX_POWER_OFDM_NUM; j++)
 246                 txpwr->ofdm[j] = min(txpwr->ofdm[j], local_constraint_qdbm);
 247
 248         /* 20 MHz Legacy OFDM CDD */
 249         for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
 250                 txpwr->ofdm_cdd[j] =
 251                     min(txpwr->ofdm_cdd[j], local_constraint_qdbm);
 252
 253         /* 40 MHz Legacy OFDM SISO */
 254         for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
 255                 txpwr->ofdm_40_siso[j] =
 256                     min(txpwr->ofdm_40_siso[j], local_constraint_qdbm);
 257
 258         /* 40 MHz Legacy OFDM CDD */
 259         for (j = 0; j < BRCMS_NUM_RATES_OFDM; j++)
 260                 txpwr->ofdm_40_cdd[j] =
 261                     min(txpwr->ofdm_40_cdd[j], local_constraint_qdbm);
 262
 263         /* 20MHz MCS 0-7 SISO */
 264         for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 265                 txpwr->mcs_20_siso[j] =
 266                     min(txpwr->mcs_20_siso[j], local_constraint_qdbm);
 267
 268         /* 20MHz MCS 0-7 CDD */
 269         for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 270                 txpwr->mcs_20_cdd[j] =
 271                     min(txpwr->mcs_20_cdd[j], local_constraint_qdbm);
 272
 273         /* 20MHz MCS 0-7 STBC */
 274         for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 275                 txpwr->mcs_20_stbc[j] =
 276                     min(txpwr->mcs_20_stbc[j], local_constraint_qdbm);
 277
 278         /* 20MHz MCS 8-15 MIMO */
 279         for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
 280                 txpwr->mcs_20_mimo[j] =
 281                     min(txpwr->mcs_20_mimo[j], local_constraint_qdbm);
 282
 283         /* 40MHz MCS 0-7 SISO */
 284         for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 285                 txpwr->mcs_40_siso[j] =
 286                     min(txpwr->mcs_40_siso[j], local_constraint_qdbm);
 287
 288         /* 40MHz MCS 0-7 CDD */
 289         for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 290                 txpwr->mcs_40_cdd[j] =
 291                     min(txpwr->mcs_40_cdd[j], local_constraint_qdbm);
 292
 293         /* 40MHz MCS 0-7 STBC */
 294         for (j = 0; j < BRCMS_NUM_RATES_MCS_1_STREAM; j++)
 295                 txpwr->mcs_40_stbc[j] =
 296                     min(txpwr->mcs_40_stbc[j], local_constraint_qdbm);
 297
 298         /* 40MHz MCS 8-15 MIMO */
 299         for (j = 0; j < BRCMS_NUM_RATES_MCS_2_STREAM; j++)
 300                 txpwr->mcs_40_mimo[j] =
 301                     min(txpwr->mcs_40_mimo[j], local_constraint_qdbm);
 302
 303         /* 40MHz MCS 32 */
 304         txpwr->mcs32 = min(txpwr->mcs32, local_constraint_qdbm);
 305
 306 }
 307
 308 /*
 309  * set the driver's current country and regulatory information
 310  * using a country code as the source. Look up built in country
 311  * information found with the country code.
 312  */
 313 static void
 314 brcms_c_set_country(struct brcms_cm_info *wlc_cm,
 315                     const struct brcms_regd *regd)
 316 {
 317         struct brcms_c_info *wlc = wlc_cm->wlc;
 318
 319         if ((wlc->pub->_n_enab & SUPPORT_11N) !=
 320             wlc->protection->nmode_user)
 321                 brcms_c_set_nmode(wlc);
 322
 323         brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]);
 324         brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]);
 325
 326         brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);
 327
 328         return;
 329 }
 330
 331 struct brcms_cm_info *brcms_c_channel_mgr_attach(struct brcms_c_info *wlc)
 332 {
 333         struct brcms_cm_info *wlc_cm;
 334         struct brcms_pub *pub = wlc->pub;
 335         struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
 336         const char *ccode = sprom->alpha2;
 337         int ccode_len = sizeof(sprom->alpha2);
 338
 339         wlc_cm = kzalloc(sizeof(struct brcms_cm_info), GFP_ATOMIC);
 340         if (wlc_cm == NULL)
 341                 return NULL;
 342         wlc_cm->pub = pub;
 343         wlc_cm->wlc = wlc;
 344         wlc->cmi = wlc_cm;
 345
 346         /* store the country code for passing up as a regulatory hint */
 347         wlc_cm->world_regd = brcms_world_regd(ccode, ccode_len);
 348         if (brcms_c_country_valid(ccode))
 349                 strncpy(wlc->pub->srom_ccode, ccode, ccode_len);
 350
 351         /*
 352          * If no custom world domain is found in the SROM, use the
 353          * default "X2" domain.
 354          */
 355         if (!wlc_cm->world_regd) {
 356                 wlc_cm->world_regd = brcms_default_world_regd();
 357                 ccode = wlc_cm->world_regd->regdomain->alpha2;
 358                 ccode_len = BRCM_CNTRY_BUF_SZ - 1;
 359         }
 360
 361         /* save default country for exiting 11d regulatory mode */
 362         strncpy(wlc->country_default, ccode, ccode_len);
 363
 364         /* initialize autocountry_default to driver default */
 365         strncpy(wlc->autocountry_default, ccode, ccode_len);
 366
 367         brcms_c_set_country(wlc_cm, wlc_cm->world_regd);
 368
 369         return wlc_cm;
 370 }
 371
 372 void brcms_c_channel_mgr_detach(struct brcms_cm_info *wlc_cm)
 373 {
 374         kfree(wlc_cm);
 375 }
 376
 377 void
 378 brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec,
 379                          u8 local_constraint_qdbm)
 380 {
 381         struct brcms_c_info *wlc = wlc_cm->wlc;
 382         struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.chandef.chan;
 383         struct txpwr_limits txpwr;
 384
 385         brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr);
 386
 387         brcms_c_channel_min_txpower_limits_with_local_constraint(
 388                 wlc_cm, &txpwr, local_constraint_qdbm
 389         );
 390
 391         /* set or restore gmode as required by regulatory */
 392         if (ch->flags & IEEE80211_CHAN_NO_OFDM)
 393                 brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false);
 394         else
 395                 brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);
 396
 397         brcms_b_set_chanspec(wlc->hw, chanspec,
 398                               !!(ch->flags & IEEE80211_CHAN_PASSIVE_SCAN),
 399                               &txpwr);
 400 }
 401
 402 void
 403 brcms_c_channel_reg_limits(struct brcms_cm_info *wlc_cm, u16 chanspec,
 404                        struct txpwr_limits *txpwr)
 405 {
 406         struct brcms_c_info *wlc = wlc_cm->wlc;
 407         struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.chandef.chan;
 408         uint i;
 409         uint chan;
 410         int maxpwr;
 411         int delta;
 412         const struct country_info *country;
 413         struct brcms_band *band;
 414         int conducted_max = BRCMS_TXPWR_MAX;
 415         const struct locale_mimo_info *li_mimo;
 416         int maxpwr20, maxpwr40;
 417         int maxpwr_idx;
 418         uint j;
 419
 420         memset(txpwr, 0, sizeof(struct txpwr_limits));
 421
 422         if (WARN_ON(!ch))
 423                 return;
 424
 425         country = &wlc_cm->world_regd->country;
 426
 427         chan = CHSPEC_CHANNEL(chanspec);
 428         band = wlc->bandstate[chspec_bandunit(chanspec)];
 429         li_mimo = (band->bandtype == BRCM_BAND_5G) ?
 430             brcms_c_get_mimo_5g(country->locale_mimo_5G) :
 431             brcms_c_get_mimo_2g(country->locale_mimo_2G);
 432
 433         delta = band->antgain;
 434
 435         if (band->bandtype == BRCM_BAND_2G)
 436                 conducted_max = QDB(22);
 437
 438         maxpwr = QDB(ch->max_power) - delta;
 439         maxpwr = max(maxpwr, 0);
 440         maxpwr = min(maxpwr, conducted_max);
 441
 442         /* CCK txpwr limits for 2.4G band */
 443         if (band->bandtype == BRCM_BAND_2G) {
 444                 for (i = 0; i < BRCMS_NUM_RATES_CCK; i++)
 445                         txpwr->cck[i] = (u8) maxpwr;
 446         }
 447
 448         for (i = 0; i < BRCMS_NUM_RATES_OFDM; i++) {
 449                 txpwr->ofdm[i] = (u8) maxpwr;
 450
 451                 /*
 452                  * OFDM 40 MHz SISO has the same power as the corresponding
 453                  * MCS0-7 rate unless overriden by the locale specific code.
 454                  * We set this value to 0 as a flag (presumably 0 dBm isn't
 455                  * a possibility) and then copy the MCS0-7 value to the 40 MHz
 456                  * value if it wasn't explicitly set.
 457                  */
 458                 txpwr->ofdm_40_siso[i] = 0;
 459
 460                 txpwr->ofdm_cdd[i] = (u8) maxpwr;
 461
 462                 txpwr->ofdm_40_cdd[i] = 0;
 463         }
 464
 465         delta = 0;
 466         if (band->antgain > QDB(6))
 467                 delta = band->antgain - QDB(6); /* Excess over 6 dB */
 468
 469         if (band->bandtype == BRCM_BAND_2G)
 470                 maxpwr_idx = (chan - 1);
 471         else
 472                 maxpwr_idx = CHANNEL_POWER_IDX_5G(chan);
 473
 474         maxpwr20 = li_mimo->maxpwr20[maxpwr_idx];
 475         maxpwr40 = li_mimo->maxpwr40[maxpwr_idx];
 476
 477         maxpwr20 = maxpwr20 - delta;
 478         maxpwr20 = max(maxpwr20, 0);
 479         maxpwr40 = maxpwr40 - delta;
 480         maxpwr40 = max(maxpwr40, 0);
 481
 482         /* Fill in the MCS 0-7 (SISO) rates */
 483         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 484
 485                 /*
 486                  * 20 MHz has the same power as the corresponding OFDM rate
 487                  * unless overriden by the locale specific code.
 488                  */
 489                 txpwr->mcs_20_siso[i] = txpwr->ofdm[i];
 490                 txpwr->mcs_40_siso[i] = 0;
 491         }
 492
 493         /* Fill in the MCS 0-7 CDD rates */
 494         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 495                 txpwr->mcs_20_cdd[i] = (u8) maxpwr20;
 496                 txpwr->mcs_40_cdd[i] = (u8) maxpwr40;
 497         }
 498
 499         /*
 500          * These locales have SISO expressed in the
 501          * table and override CDD later
 502          */
 503         if (li_mimo == &locale_bn) {
 504                 if (li_mimo == &locale_bn) {
 505                         maxpwr20 = QDB(16);
 506                         maxpwr40 = 0;
 507
 508                         if (chan >= 3 && chan <= 11)
 509                                 maxpwr40 = QDB(16);
 510                 }
 511
 512                 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 513                         txpwr->mcs_20_siso[i] = (u8) maxpwr20;
 514                         txpwr->mcs_40_siso[i] = (u8) maxpwr40;
 515                 }
 516         }
 517
 518         /* Fill in the MCS 0-7 STBC rates */
 519         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 520                 txpwr->mcs_20_stbc[i] = 0;
 521                 txpwr->mcs_40_stbc[i] = 0;
 522         }
 523
 524         /* Fill in the MCS 8-15 SDM rates */
 525         for (i = 0; i < BRCMS_NUM_RATES_MCS_2_STREAM; i++) {
 526                 txpwr->mcs_20_mimo[i] = (u8) maxpwr20;
 527                 txpwr->mcs_40_mimo[i] = (u8) maxpwr40;
 528         }
 529
 530         /* Fill in MCS32 */
 531         txpwr->mcs32 = (u8) maxpwr40;
 532
 533         for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 534                 if (txpwr->ofdm_40_cdd[i] == 0)
 535                         txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 536                 if (i == 0) {
 537                         i = i + 1;
 538                         if (txpwr->ofdm_40_cdd[i] == 0)
 539                                 txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 540                 }
 541         }
 542
 543         /*
 544          * Copy the 40 MHZ MCS 0-7 CDD value to the 40 MHZ MCS 0-7 SISO
 545          * value if it wasn't provided explicitly.
 546          */
 547         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 548                 if (txpwr->mcs_40_siso[i] == 0)
 549                         txpwr->mcs_40_siso[i] = txpwr->mcs_40_cdd[i];
 550         }
 551
 552         for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 553                 if (txpwr->ofdm_40_siso[i] == 0)
 554                         txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 555                 if (i == 0) {
 556                         i = i + 1;
 557                         if (txpwr->ofdm_40_siso[i] == 0)
 558                                 txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 559                 }
 560         }
 561
 562         /*
 563          * Copy the 20 and 40 MHz MCS0-7 CDD values to the corresponding
 564          * STBC values if they weren't provided explicitly.
 565          */
 566         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 567                 if (txpwr->mcs_20_stbc[i] == 0)
 568                         txpwr->mcs_20_stbc[i] = txpwr->mcs_20_cdd[i];
 569
 570                 if (txpwr->mcs_40_stbc[i] == 0)
 571                         txpwr->mcs_40_stbc[i] = txpwr->mcs_40_cdd[i];
 572         }
 573
 574         return;
 575 }
 576
 577 /*
 578  * Verify the chanspec is using a legal set of parameters, i.e. that the
 579  * chanspec specified a band, bw, ctl_sb and channel and that the
 580  * combination could be legal given any set of circumstances.
 581  * RETURNS: true is the chanspec is malformed, false if it looks good.
 582  */
 583 static bool brcms_c_chspec_malformed(u16 chanspec)
 584 {
 585         /* must be 2G or 5G band */
 586         if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
 587                 return true;
 588         /* must be 20 or 40 bandwidth */
 589         if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
 590                 return true;
 591
 592         /* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
 593         if (CHSPEC_IS20(chanspec)) {
 594                 if (!CHSPEC_SB_NONE(chanspec))
 595                         return true;
 596         } else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) {
 597                 return true;
 598         }
 599
 600         return false;
 601 }
 602
 603 /*
 604  * Validate the chanspec for this locale, for 40MHZ we need to also
 605  * check that the sidebands are valid 20MZH channels in this locale
 606  * and they are also a legal HT combination
 607  */
 608 static bool
 609 brcms_c_valid_chanspec_ext(struct brcms_cm_info *wlc_cm, u16 chspec)
 610 {
 611         struct brcms_c_info *wlc = wlc_cm->wlc;
 612         u8 channel = CHSPEC_CHANNEL(chspec);
 613
 614         /* check the chanspec */
 615         if (brcms_c_chspec_malformed(chspec)) {
 616                 brcms_err(wlc->hw->d11core, "wl%d: malformed chanspec 0x%x\n",
 617                           wlc->pub->unit, chspec);
 618                 return false;
 619         }
 620
 621         if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) !=
 622             chspec_bandunit(chspec))
 623                 return false;
 624
 625         return true;
 626 }
 627
 628 bool brcms_c_valid_chanspec_db(struct brcms_cm_info *wlc_cm, u16 chspec)
 629 {
 630         return brcms_c_valid_chanspec_ext(wlc_cm, chspec);
 631 }
 632
 633 static bool brcms_is_radar_freq(u16 center_freq)
 634 {
 635         return center_freq >= 5260 && center_freq <= 5700;
 636 }
 637
 638 static void brcms_reg_apply_radar_flags(struct wiphy *wiphy)
 639 {
 640         struct ieee80211_supported_band *sband;
 641         struct ieee80211_channel *ch;
 642         int i;
 643
 644         sband = wiphy->bands[IEEE80211_BAND_5GHZ];
 645         if (!sband)
 646                 return;
 647
 648         for (i = 0; i < sband->n_channels; i++) {
 649                 ch = &sband->channels[i];
 650
 651                 if (!brcms_is_radar_freq(ch->center_freq))
 652                         continue;
 653
 654                 /*
 655                  * All channels in this range should be passive and have
 656                  * DFS enabled.
 657                  */
 658                 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 659                         ch->flags |= IEEE80211_CHAN_RADAR |
 660                                      IEEE80211_CHAN_NO_IBSS |
 661                                      IEEE80211_CHAN_PASSIVE_SCAN;
 662         }
 663 }
 664
 665 static void
 666 brcms_reg_apply_beaconing_flags(struct wiphy *wiphy,
 667                                 enum nl80211_reg_initiator initiator)
 668 {
 669         struct ieee80211_supported_band *sband;
 670         struct ieee80211_channel *ch;
 671         const struct ieee80211_reg_rule *rule;
 672         int band, i;
 673
 674         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 675                 sband = wiphy->bands[band];
 676                 if (!sband)
 677                         continue;
 678
 679                 for (i = 0; i < sband->n_channels; i++) {
 680                         ch = &sband->channels[i];
 681
 682                         if (ch->flags &
 683                             (IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_RADAR))
 684                                 continue;
 685
 686                         if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
 687                                 rule = freq_reg_info(wiphy, ch->center_freq);
 688                                 if (IS_ERR(rule))
 689                                         continue;
 690
 691                                 if (!(rule->flags & NL80211_RRF_NO_IBSS))
 692                                         ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
 693                                 if (!(rule->flags & NL80211_RRF_PASSIVE_SCAN))
 694                                         ch->flags &=
 695                                                 ~IEEE80211_CHAN_PASSIVE_SCAN;
 696                         } else if (ch->beacon_found) {
 697                                 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
 698                                                IEEE80211_CHAN_PASSIVE_SCAN);
 699                         }
 700                 }
 701         }
 702 }
 703
 704 static void brcms_reg_notifier(struct wiphy *wiphy,
 705                                struct regulatory_request *request)
 706 {
 707         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 708         struct brcms_info *wl = hw->priv;
 709         struct brcms_c_info *wlc = wl->wlc;
 710         struct ieee80211_supported_band *sband;
 711         struct ieee80211_channel *ch;
 712         int band, i;
 713         bool ch_found = false;
 714
 715         brcms_reg_apply_radar_flags(wiphy);
 716
 717         if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
 718                 brcms_reg_apply_beaconing_flags(wiphy, request->initiator);
 719
 720         /* Disable radio if all channels disallowed by regulatory */
 721         for (band = 0; !ch_found && band < IEEE80211_NUM_BANDS; band++) {
 722                 sband = wiphy->bands[band];
 723                 if (!sband)
 724                         continue;
 725
 726                 for (i = 0; !ch_found && i < sband->n_channels; i++) {
 727                         ch = &sband->channels[i];
 728
 729                         if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 730                                 ch_found = true;
 731                 }
 732         }
 733
 734         if (ch_found) {
 735                 mboolclr(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 736         } else {
 737                 mboolset(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 738                 brcms_err(wlc->hw->d11core,
 739                           "wl%d: %s: no valid channel for \"%s\"\n",
 740                           wlc->pub->unit, __func__, request->alpha2);
 741         }
 742
 743         if (wlc->pub->_nbands > 1 || wlc->band->bandtype == BRCM_BAND_2G)
 744                 wlc_phy_chanspec_ch14_widefilter_set(wlc->band->pi,
 745                                         brcms_c_japan_ccode(request->alpha2));
 746 }
 747
 748 void brcms_c_regd_init(struct brcms_c_info *wlc)
 749 {
 750         struct wiphy *wiphy = wlc->wiphy;
 751         const struct brcms_regd *regd = wlc->cmi->world_regd;
 752         struct ieee80211_supported_band *sband;
 753         struct ieee80211_channel *ch;
 754         struct brcms_chanvec sup_chan;
 755         struct brcms_band *band;
 756         int band_idx, i;
 757
 758         /* Disable any channels not supported by the phy */
 759         for (band_idx = 0; band_idx < wlc->pub->_nbands; band_idx++) {
 760                 band = wlc->bandstate[band_idx];
 761
 762                 wlc_phy_chanspec_band_validch(band->pi, band->bandtype,
 763                                               &sup_chan);
 764
 765                 if (band_idx == BAND_2G_INDEX)
 766                         sband = wiphy->bands[IEEE80211_BAND_2GHZ];
 767                 else
 768                         sband = wiphy->bands[IEEE80211_BAND_5GHZ];
 769
 770                 for (i = 0; i < sband->n_channels; i++) {
 771                         ch = &sband->channels[i];
 772                         if (!isset(sup_chan.vec, ch->hw_value))
 773                                 ch->flags |= IEEE80211_CHAN_DISABLED;
 774                 }
 775         }
 776
 777         wlc->wiphy->reg_notifier = brcms_reg_notifier;
 778         wlc->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 779                              WIPHY_FLAG_STRICT_REGULATORY;
 780         wiphy_apply_custom_regulatory(wlc->wiphy, regd->regdomain);
 781         brcms_reg_apply_beaconing_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER);
 782 }